CA2495472A1 - Linear transfer device - Google Patents
Linear transfer device Download PDFInfo
- Publication number
- CA2495472A1 CA2495472A1 CA 2495472 CA2495472A CA2495472A1 CA 2495472 A1 CA2495472 A1 CA 2495472A1 CA 2495472 CA2495472 CA 2495472 CA 2495472 A CA2495472 A CA 2495472A CA 2495472 A1 CA2495472 A1 CA 2495472A1
- Authority
- CA
- Canada
- Prior art keywords
- axle
- tapped
- threaded rod
- transfer device
- linear transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
Abstract
The invention relates to a transfer device for converting rotational motion into linear motion along a straight path or along a curved path, comprising a threaded rod, a device for generating rotational motion about an axle such as a DC motor, said motor comprising an axle that is hollow and tapped along the length of the axis of rotation of the axle such that the threaded rod enters at one end, feeds through the inside of the tapped axle and exits the back end of the tapped axle, thus extending beyond both ends of the axle.
The threaded rod is immobile. The electric motor housing is kept from rotating by a guide.
When the motor axle spins the motor travels along the threaded rod. This invention also applies to pneumatic rotating devices comprising a tapped rotating axle engaged by a threaded rod to convert rotational motion into linear motion.
The threaded rod is immobile. The electric motor housing is kept from rotating by a guide.
When the motor axle spins the motor travels along the threaded rod. This invention also applies to pneumatic rotating devices comprising a tapped rotating axle engaged by a threaded rod to convert rotational motion into linear motion.
Description
BACKGROUND OF THE INVENTION:
The invention pertains generally to linear transfer devices. More specifically to linear transfer devices utilizing a combination of an electric motor and a longitudinal member such as a rod, rail, cable, shaft etc. to convert rotational motion of the motor into linear motion.
The principles behind the operations of a conventional electric motor Fig 1 are well known.
A typical conventional motor consists of an axle which serves as the main shaft of rotation, a commutator to control current flow, copper wire to generate electromagnetic fields in the armature, permanent magnets (or electromagnets) to attract/repel the electromagnets of the armature, the contents of which are housed in a motor housing. When current is applied the motor turns around the axis of rotation of the axle. This is rotational motion. To change rotational motion into linear motion engineering has relied on the use of gears, pulleys, cables, sliding devices etc which are expensive to manufacture and challenging to house. This current invention converts rotational motion of the axle of the electric motor through the tapped core of the axle directly into linear motion along a threaded rod thus causing the motor to travel in a to-and-fro motion in a linear path or curved path along the threaded rod. Thus the invention is simple, consists of very few parts, is small and easily packaged in small-space applications, it is compact and inexpensive to manufacture. One additional advantage is in this invention's ability to produce motion not only along a straight line but also along a curved path.
It can thus be seen that the present invention provides a novel, superior and inexpensive method for converting rotational motion into linear motion.
SUMMARY OF THE INVENTION:
The invention pertains to a linear transfer device for the purpose of converting rotational motion of an electric motor (or pneumatic motor) into motion along a straight line or a curved path. The said invention comprises a conventional reversible electric motor with a hollow tapped core extending the full length of the axle through which a threaded rod wilt pass entering at one end of the axle, through the full length of the axle, and out the other end of the axle and beyond the electric motor.
The threaded rod is secured so that it cannot move in any direction, and the threaded rod cannot rotate along its longitudinal axis. The motor housing containing the tapped-axle is secured such that the motor housing cannot rotate about the axis of the tapped-axle, however the motor can move in a linear direction along the threaded rod.
Conversion of rotational motion into linear motion is obtained at the point where the treaded rod engages the tapped-axle of the motor.
When current is applied to the electric motor, the axle rotates causing the entire electric motor to advance in either direction along the threaded rod which passes through the axle.
If the length of the tapped-axle is sufficiently short, or the length of the tap along the inner core of the axle is sufficiently short, movement can be obtained along a curved path. The invention is of significant benefit since it is small, consists of very few parts, does not rely on reduction gears, belts, cables, pulleys etc and is very cost effective to manufacture.
DESCRIPTION OF PRIOR ART:
It is known in the prior act to provide a linear transfer device comprising an electric motor and a threaded rod to convert rotary motion of the motor into linear motion along the threaded rod. For instance U.S. Patent number 6,453,761 (inventor Babinski, Sept 24/2002) and U.S. Patent number 5,899,114 (inventor Dolata May 4/1999), which rely on a helical rod entering a nut-like motor cavity, a complex ball-circuit raceway, a re-circulation of balls, and the motor stands still while the rod moves.
In a different application, U.S. patent number 5,622,251 (inventor Rantanen April 22, 1997) relies on a stationary electric motor, a straight threaded rod, a tapped nut and accompanying brackets and guiding rods to accompany linear travel, limitations include high manufacturing costs and linear travel in a straight line only.
In an interesting design, US Patent number 4,560,894 (Stoll Dec 24/1985), a concentric tap running on the outside of the armature of the electric motor is mated with a threaded rod of a sliding unit, however the mechanism is limited in travel length no greater than the length of the motor and linear movement is limited to straight line travel only.
It is clear that the present invention presents a novel, versatile and low cost solution to the need for converting rotational motion of an electric motor into movement along a straight path or curved path which the above mentioned patents fail to provide.
BRIEF DESCRIPTION OF THE DRAWINGS:
Fig-1: Conventional Electric Motor Fig-2: Invention: New Electric motor having a concentric hollow and tapped center extending the full length of the motor axle and threaded rod Fig-3: A cross section of Fig 2 along plane FF showing the tapped axle Fig-4: A cross section of Fig 2 along plane FF showing a straight threaded rod fed through the tapped axle Fig-5: A cross section of Fig 2 along plane FF showing the axle with a shorter tapped core for use on curved threaded rods Fig-6: A cross section of Fig 2 along plane FF showing a curved threaded rod fed through the tapped axle Fig-7: A cross section illustrating how the threaded rod is to be immobilized in order to prevent rotation of the rod during motor travel Fig-8: Illustrates how the invention can be applied to serve as a vehicle window regulator Fig-9: Illustrates a cross section of a tapped-axle having a concentric profile to suit the curvature of the curved rod Fig-10: Illustrates a cross section of a tapped-axle's internal curved profile Fig-11: Illustrates an insert to be housed inside a hollow axle where said insert replaces the tap for engaging the curved threaded rod Fig-12: 111ustrates said insert of Fig-11 housed inside said hollow axle and engaged by a curved threaded rod DESCRIPTION OF THE PREFERRED EMBODIMENT:
Fig-1 illustrates the design of the conventional electric motor (10) and the modification to the conventional motor to create the tapped-axle motor (12) in Fig-2 which in cooperation with the threaded rod (8) comprises a transfer device for performing linear transfer movement along a straight path or along a curved path.
Fig-1 illustrates the design of the conventional electric motor including the axle (1 ), the commutator (2), copper wiring (3), armature (4), permanent magnet (5), motor housing (6) and an axis of rotation (AA) along the axle (1) allowing for direction of rotation (B) and (C) of the axle (1 ).
Fig-2 illustrates the modification to the conventional electric motor. Note the solid axle (1) of Fig-1 is replaced with an axle having a hollow core (7b) concentric to the axis of rotation FF and said hollow core is tapped such that a matching threaded rod (8) will pass through the tapped-axle (7) and extend beyond both ends of the electric motor. When the tapped-axle motor (12) is engaged, rotational movement of the tapped-axle (7) in the direction D and E is transformed into linear movement along the threaded rod (8) in the direction G and H.
Fig-3 is an illustration of the cross section of the tapped-axle motor (12) of Fig-2 along (FF). Note the tapped-axle (7) is hollow throughout the full length of the axle and the tap (14) itself is concentric and internal to the tapped-axle (7). The diameter of the axle (13), the tap size (14), the length of tapping distance (15) will vary with the application depending on strength requirement, torque necessary to move the load, travel speed etc. required by the transfer device. Also concentric bearings (11A) and (11 B) are mounted to separate the tapped-axle (7) and the motor housing (9) as well as reduce component wear during motor travel.
Fig-4 illustrates a straight threaded rod (8) passing through the full length of the tapped-axle (7) of the tapped -axle motor (12).
Fig-5 illustrates how the tapped-axle (7) would be adapted to suit a curved threaded rod (16) passing through the tapped-axle motor (12). Note the tapping distance (15) is reduced to minimize the points of contact between the tapped-axle (7) and the curved threaded rod (16). The hollow axle-core (17a) and (17b) is the part of the tapped-axle (7) that is not tapped but is of greater diameter than the tap diameter to allow the curved threaded rod (16) to pass uninhibited. Also thread separation of fine or coarse thread, hollow axle-core diameter (17c), tap size, tapping distance (15) will be selected to allow the curved threaded rod (16) to pass uninhibited. Note that although the curved-threaded-rod (16) is in fact curved over a large distance, the curved rod (16) over a length equal to the tapped distance (15) of the tapped-axle (7) is almost straight, hence with minimal play between the tap and the thread the tapped-axle motor (12) can advance along a curved rod (16).
Fig-6 illustrates how a curved threaded rod (16) would fit through the tapped-axle motor (12). Note that the treaded rod (16) only engages the tapped-axle (7) along the tapped distance (15) and the hollow axle core (1Ta) and (17b) do not engage the curved threaded rod (16).
Fig-7 illustrates that the threaded rod is secured at either or both ends with a stopper (17) such that the straight threaded rod (8) or curved threaded rod (16) is immobilized by the stopper (17).
A guide-clamp (18) is secured to the tapped-axle motor housing (9) to prevent the motor housing (9) from spinning around the threaded rod (8) when the motor is engaged. The guide clamp (18) may be guided along a guide (19) to allow movement of the tapped-axle motor (12) in the direction (G) and (H) along the length of the threaded rod (8) or (16).
Fig-8 illustrates how an automotive window regulator would apply this invention. A
car window (23) guided along a window frame (21 ) is attached to the tapped-axle motor housing (9) by way of attachment units (20) and (22). Thus the window (23) would prevent the tapped-axle motor (12) from spinning around the threaded rod (8).
The tapped-axle motor (12) and the car window (23) travel along the straight threaded rod (8) or curved threaded rod (16) in the direction (G) and (H).
Fig-9 illustrates a cross-section of a particularly curved threaded (16) rod entering the tapped-axle (7) where the tapped-axle's axis of rotation (24) is linear, but the axis of the curved threaded rod (16) has a curved profile (25).
Fig-10 illustrates a cross section of a tapped-axle core having a concentric axis (24) and a curved profile of the tapped core (26a) and (26b) in an effort to eliminate jamming of the transfer device when penetrated by a threaded rod.
The invention pertains generally to linear transfer devices. More specifically to linear transfer devices utilizing a combination of an electric motor and a longitudinal member such as a rod, rail, cable, shaft etc. to convert rotational motion of the motor into linear motion.
The principles behind the operations of a conventional electric motor Fig 1 are well known.
A typical conventional motor consists of an axle which serves as the main shaft of rotation, a commutator to control current flow, copper wire to generate electromagnetic fields in the armature, permanent magnets (or electromagnets) to attract/repel the electromagnets of the armature, the contents of which are housed in a motor housing. When current is applied the motor turns around the axis of rotation of the axle. This is rotational motion. To change rotational motion into linear motion engineering has relied on the use of gears, pulleys, cables, sliding devices etc which are expensive to manufacture and challenging to house. This current invention converts rotational motion of the axle of the electric motor through the tapped core of the axle directly into linear motion along a threaded rod thus causing the motor to travel in a to-and-fro motion in a linear path or curved path along the threaded rod. Thus the invention is simple, consists of very few parts, is small and easily packaged in small-space applications, it is compact and inexpensive to manufacture. One additional advantage is in this invention's ability to produce motion not only along a straight line but also along a curved path.
It can thus be seen that the present invention provides a novel, superior and inexpensive method for converting rotational motion into linear motion.
SUMMARY OF THE INVENTION:
The invention pertains to a linear transfer device for the purpose of converting rotational motion of an electric motor (or pneumatic motor) into motion along a straight line or a curved path. The said invention comprises a conventional reversible electric motor with a hollow tapped core extending the full length of the axle through which a threaded rod wilt pass entering at one end of the axle, through the full length of the axle, and out the other end of the axle and beyond the electric motor.
The threaded rod is secured so that it cannot move in any direction, and the threaded rod cannot rotate along its longitudinal axis. The motor housing containing the tapped-axle is secured such that the motor housing cannot rotate about the axis of the tapped-axle, however the motor can move in a linear direction along the threaded rod.
Conversion of rotational motion into linear motion is obtained at the point where the treaded rod engages the tapped-axle of the motor.
When current is applied to the electric motor, the axle rotates causing the entire electric motor to advance in either direction along the threaded rod which passes through the axle.
If the length of the tapped-axle is sufficiently short, or the length of the tap along the inner core of the axle is sufficiently short, movement can be obtained along a curved path. The invention is of significant benefit since it is small, consists of very few parts, does not rely on reduction gears, belts, cables, pulleys etc and is very cost effective to manufacture.
DESCRIPTION OF PRIOR ART:
It is known in the prior act to provide a linear transfer device comprising an electric motor and a threaded rod to convert rotary motion of the motor into linear motion along the threaded rod. For instance U.S. Patent number 6,453,761 (inventor Babinski, Sept 24/2002) and U.S. Patent number 5,899,114 (inventor Dolata May 4/1999), which rely on a helical rod entering a nut-like motor cavity, a complex ball-circuit raceway, a re-circulation of balls, and the motor stands still while the rod moves.
In a different application, U.S. patent number 5,622,251 (inventor Rantanen April 22, 1997) relies on a stationary electric motor, a straight threaded rod, a tapped nut and accompanying brackets and guiding rods to accompany linear travel, limitations include high manufacturing costs and linear travel in a straight line only.
In an interesting design, US Patent number 4,560,894 (Stoll Dec 24/1985), a concentric tap running on the outside of the armature of the electric motor is mated with a threaded rod of a sliding unit, however the mechanism is limited in travel length no greater than the length of the motor and linear movement is limited to straight line travel only.
It is clear that the present invention presents a novel, versatile and low cost solution to the need for converting rotational motion of an electric motor into movement along a straight path or curved path which the above mentioned patents fail to provide.
BRIEF DESCRIPTION OF THE DRAWINGS:
Fig-1: Conventional Electric Motor Fig-2: Invention: New Electric motor having a concentric hollow and tapped center extending the full length of the motor axle and threaded rod Fig-3: A cross section of Fig 2 along plane FF showing the tapped axle Fig-4: A cross section of Fig 2 along plane FF showing a straight threaded rod fed through the tapped axle Fig-5: A cross section of Fig 2 along plane FF showing the axle with a shorter tapped core for use on curved threaded rods Fig-6: A cross section of Fig 2 along plane FF showing a curved threaded rod fed through the tapped axle Fig-7: A cross section illustrating how the threaded rod is to be immobilized in order to prevent rotation of the rod during motor travel Fig-8: Illustrates how the invention can be applied to serve as a vehicle window regulator Fig-9: Illustrates a cross section of a tapped-axle having a concentric profile to suit the curvature of the curved rod Fig-10: Illustrates a cross section of a tapped-axle's internal curved profile Fig-11: Illustrates an insert to be housed inside a hollow axle where said insert replaces the tap for engaging the curved threaded rod Fig-12: 111ustrates said insert of Fig-11 housed inside said hollow axle and engaged by a curved threaded rod DESCRIPTION OF THE PREFERRED EMBODIMENT:
Fig-1 illustrates the design of the conventional electric motor (10) and the modification to the conventional motor to create the tapped-axle motor (12) in Fig-2 which in cooperation with the threaded rod (8) comprises a transfer device for performing linear transfer movement along a straight path or along a curved path.
Fig-1 illustrates the design of the conventional electric motor including the axle (1 ), the commutator (2), copper wiring (3), armature (4), permanent magnet (5), motor housing (6) and an axis of rotation (AA) along the axle (1) allowing for direction of rotation (B) and (C) of the axle (1 ).
Fig-2 illustrates the modification to the conventional electric motor. Note the solid axle (1) of Fig-1 is replaced with an axle having a hollow core (7b) concentric to the axis of rotation FF and said hollow core is tapped such that a matching threaded rod (8) will pass through the tapped-axle (7) and extend beyond both ends of the electric motor. When the tapped-axle motor (12) is engaged, rotational movement of the tapped-axle (7) in the direction D and E is transformed into linear movement along the threaded rod (8) in the direction G and H.
Fig-3 is an illustration of the cross section of the tapped-axle motor (12) of Fig-2 along (FF). Note the tapped-axle (7) is hollow throughout the full length of the axle and the tap (14) itself is concentric and internal to the tapped-axle (7). The diameter of the axle (13), the tap size (14), the length of tapping distance (15) will vary with the application depending on strength requirement, torque necessary to move the load, travel speed etc. required by the transfer device. Also concentric bearings (11A) and (11 B) are mounted to separate the tapped-axle (7) and the motor housing (9) as well as reduce component wear during motor travel.
Fig-4 illustrates a straight threaded rod (8) passing through the full length of the tapped-axle (7) of the tapped -axle motor (12).
Fig-5 illustrates how the tapped-axle (7) would be adapted to suit a curved threaded rod (16) passing through the tapped-axle motor (12). Note the tapping distance (15) is reduced to minimize the points of contact between the tapped-axle (7) and the curved threaded rod (16). The hollow axle-core (17a) and (17b) is the part of the tapped-axle (7) that is not tapped but is of greater diameter than the tap diameter to allow the curved threaded rod (16) to pass uninhibited. Also thread separation of fine or coarse thread, hollow axle-core diameter (17c), tap size, tapping distance (15) will be selected to allow the curved threaded rod (16) to pass uninhibited. Note that although the curved-threaded-rod (16) is in fact curved over a large distance, the curved rod (16) over a length equal to the tapped distance (15) of the tapped-axle (7) is almost straight, hence with minimal play between the tap and the thread the tapped-axle motor (12) can advance along a curved rod (16).
Fig-6 illustrates how a curved threaded rod (16) would fit through the tapped-axle motor (12). Note that the treaded rod (16) only engages the tapped-axle (7) along the tapped distance (15) and the hollow axle core (1Ta) and (17b) do not engage the curved threaded rod (16).
Fig-7 illustrates that the threaded rod is secured at either or both ends with a stopper (17) such that the straight threaded rod (8) or curved threaded rod (16) is immobilized by the stopper (17).
A guide-clamp (18) is secured to the tapped-axle motor housing (9) to prevent the motor housing (9) from spinning around the threaded rod (8) when the motor is engaged. The guide clamp (18) may be guided along a guide (19) to allow movement of the tapped-axle motor (12) in the direction (G) and (H) along the length of the threaded rod (8) or (16).
Fig-8 illustrates how an automotive window regulator would apply this invention. A
car window (23) guided along a window frame (21 ) is attached to the tapped-axle motor housing (9) by way of attachment units (20) and (22). Thus the window (23) would prevent the tapped-axle motor (12) from spinning around the threaded rod (8).
The tapped-axle motor (12) and the car window (23) travel along the straight threaded rod (8) or curved threaded rod (16) in the direction (G) and (H).
Fig-9 illustrates a cross-section of a particularly curved threaded (16) rod entering the tapped-axle (7) where the tapped-axle's axis of rotation (24) is linear, but the axis of the curved threaded rod (16) has a curved profile (25).
Fig-10 illustrates a cross section of a tapped-axle core having a concentric axis (24) and a curved profile of the tapped core (26a) and (26b) in an effort to eliminate jamming of the transfer device when penetrated by a threaded rod.
Fig-11 illustrates a helical insert (27) comprising a mounting member (28) and extending in both directions are flexible helical spiral prongs (29) and (30).
The helical insert engages the curved threaded rod (16) in a nut-and-screw method, the spiral prongs (29) and (30) are flexible and bend to follow the contour of the threaded rod (16) as in Fig-12. The helical insert (27) is concentrically fitted in the hollow core of the axle (7b) in place of the tap. The helical insert (27) is used in applications where the curvature of the threaded rod (16) is significant such that the use of a tap inside the axle is not practical.
The helical insert engages the curved threaded rod (16) in a nut-and-screw method, the spiral prongs (29) and (30) are flexible and bend to follow the contour of the threaded rod (16) as in Fig-12. The helical insert (27) is concentrically fitted in the hollow core of the axle (7b) in place of the tap. The helical insert (27) is used in applications where the curvature of the threaded rod (16) is significant such that the use of a tap inside the axle is not practical.
Claims (44)
1) A linear transfer device comprising a modified conventional reversible electric motor and a threaded rod, said transfer device comprising:
a) an enclosing motor housing with front and rear walls having axially aligned openings for freely passing the motor-axle to extend marginally beyond said walls in both directions;
b) an outside spin electric motor including a radially inner axle and a generally concentric outer rotor assembly wherein said axle comprises a concentric hollow and tapped through-hole along the axis of rotation of the axle such that the tapped through-hole extends the full length of the axle;
c) a concentric bearing at each end of the motor between the tapped-axle and the motor housing reducing friction between the axle and the motor housing caused by rotation of the tapped-axle;
d) a threaded rod entering the tapped axle in a nut and screw type manner (the threaded rod being the screw and the tapped axle being the nut), wherein the threaded rod penetrates the full length of the tapped axle and the threaded rod exits the other end of the tapped axle, and the threaded rod extends beyond both ends of the tapped axle;
a) an enclosing motor housing with front and rear walls having axially aligned openings for freely passing the motor-axle to extend marginally beyond said walls in both directions;
b) an outside spin electric motor including a radially inner axle and a generally concentric outer rotor assembly wherein said axle comprises a concentric hollow and tapped through-hole along the axis of rotation of the axle such that the tapped through-hole extends the full length of the axle;
c) a concentric bearing at each end of the motor between the tapped-axle and the motor housing reducing friction between the axle and the motor housing caused by rotation of the tapped-axle;
d) a threaded rod entering the tapped axle in a nut and screw type manner (the threaded rod being the screw and the tapped axle being the nut), wherein the threaded rod penetrates the full length of the tapped axle and the threaded rod exits the other end of the tapped axle, and the threaded rod extends beyond both ends of the tapped axle;
2) A linear transfer device as in Claim 1 wherein the threaded rod comprises a rod that may have a solid or concentrically hollow core and said rod is threaded the full length of the rod;
3) A linear transfer device as in Claim 1 wherein the threaded is threaded the full length of the rod;
4) A linear transfer device as in Claim 1 wherein said threaded rod is secured at one or both ends such that the threaded rod is unable to move in any direction;
5) A linear transfer device as in Claim 1 wherein said threaded rod is secured at one or both ends such that the threaded rod is unable to rotate about its longitudinal axis;
6) A linear transfer device as in Claim 1 wherein said threaded rod is resistant to deformation of shape under load;
7) A linear transfer device as in Claim 1 wherein said threaded rod may be flexible in applications where guiding of the motor housing is accomplished by an external guiding member and the rod serves the purpose of motion in either direction along the threaded rod without performing guiding functions;
8) A linear transfer device as in Claim 1 wherein either the threaded rod or the tapped-axle or both are made of material, preferably metal, wherein said metal is not affected by attraction or repulsion of magnetic fields;
9) A linear transfer device as in Claim 1 wherein both the threaded rod and the tapped-axle are comprised of a ferromagnetic metal provided the magnetic field lines of the armature of the electric motor do not interfere with ease of travel at the points of contact between the tapped-axle and the threaded rod;
10) A linear transfer device as in Claim 1 wherein said threaded rod is straight or marginally curved or a combination of straight and marginally curved;
11 ) A linear transfer device as in Claim 1 wherein said threaded rod is immobilized at either or both ends of the threaded rod such that the body between the ends of the threaded rod remains unobstructed for the tapped-axle of the electric motor to travel along;
12) A linear transfer device as in Claim 1 wherein increasing or decreasing the number of threads per linear inch on the threaded rod serves as a direct gear system to transfer energy from the rotating tapped axle into linear motion along the threaded rod;
13) A linear transfer device as in Claim 1 wherein if the threaded rod is curved along an arc of radius "x", the length of the tap along the core of the tapped axle which engages the threaded rod at any given time is 1/15th or less of radius "x";
14) A linear transfer device as in Claim 1 wherein the number of threads per linear inch of the threaded rod are a direct function of the device's travel distance and rotation of the electric motor under load and time required to perform the linear transfer; by example if a linear travel distance of "A" inches along the threaded rod must be covered over a period of "B" seconds employing an electric motor with an operating speed of "C" RPM under load, then the thread separation is mathematically derived to be C/60*B/A;
15) A linear transfer device as in Claim 1 wherein the threaded rod thickness/diameter is a function of the load requirement such that the diameter will be sufficiently large such that the curvature of the threaded rod will not be compromised under full load;
16) A linear transfer device as in Claim 1 wherein the profile of the inner tapped core of the tapped axle is concentric to the axis of rotation of the axle where travel is desired along a straight threaded rod;
17) A linear transfer device as in Claim 1 wherein the profile of the inner tapped core of the tapped axle follows the profile of the curvature of the threaded rod, thus the tapped profile is convex to the axle's axis of rotation;
18) A linear transfer device as in Claim 1 wherein the rod diameter and thread size selection will have a direct impact on the torque and speed of the linear transfer device;
19) A linear transfer device as in Claim 1 wherein the thread on the threaded rod and the tap through the tapped-axle is a matching fit;
20) A linear transfer device as in Claim 1 wherein the threaded rod and the tap of the tapped axle are of marginal play, and the distance of the tapped core of the tapped-axle is such that movement can be obtained along a curved threaded rod;
21) A linear transfer device as in Claim 1 wherein the thread on a curved threaded rod and the tap on the tapped axle should have sufficient play such that the curved threaded rod will fit through the tapped axle and engage the tapped axle without causing the points of contact between the thread and the tap to jam during axle rotation;
22) A linear transfer device as in Claim 1 wherein said tapped axle motor is able to travel along a curved threaded rod relying on the principle that an arc of a large radius is virtually straight along short distances along the arc, thus the tapped region along the axle must be short enough that the curvature of the rod engaging the tapped-axle is sufficiently small as to not jam the linear transfer device;
23) A linear transfer device as in Claim 1 wherein the path of the movement of the motor is determined by the shape of the threaded rod, and said movement of the reversible motor is along the threaded rod and in both directions;
24) A linear transfer device as in Claim 1 wherein the entire reversible electric motor comprising the tapped-axle travels along the stationary threaded rod in a to-and-fro motion;
25) A linear transfer device as in Claim 1 wherein the direction of travel of the motor along the threaded rod will depend on the direction of rotation of the tapped-axle of the reversible motor;
26) A linear transfer device as in Claim 1 wherein a guide is secured to the motor housing to prevent the motor housing from spinning around the tapped-axle's axis of rotation;
27) A linear transfer device as in Claim 1 wherein the object to be transferred is secured directly or indirectly to the motor housing in place of a guide and serves as a guide;
28) A linear transfer device as in Claim 1 wherein the object to be transferred is secured directly or indirectly to the motor housing in place of a guide and serves to prevent the electric motor from rotating about its tapped-axle's axis of rotation;
29) A linear transfer device as in Claim 1 wherein the object to be transferred is mounted directly or indirectly to the motor housing in place of a guide and said object serves as a method of preventing the electric motor housing from spinning around the tapped-axle's axis of rotation when the motor is energized;
30) A linear transfer device as in Claim 1 wherein the object to be transferred is mounted directly or indirectly to the motor housing in place of a guide and said object is guided along a pathway;
31) A linear transfer device as in Claim 1 wherein said motor housing is restricted from spinning around the tapped-axle's axis of rotation;
32) A linear transfer device as in Claim 1 wherein the electric motor housing is secured to an external body such that the Electric motor housing is restricted from rotating about its longitudinal axis; however movement along the longitudinal axis is permitted;
33) A linear transfer device as in Claim 1 wherein the electric motor housing is secured to an external body such that the Electric motor housing is permitted to travel in both directions along the longitudinal axis of the threaded bar;
34) A linear transfer device as in Claim 1 comprising a concentric bearing at each end of the motor between the tapped-axle and the motor housing reducing friction between the tapped-axle and the motor housing caused by linear movement in a to-and-fro direction by the tapped-axle as it advances in either direction along the threaded rod;
35) A bearing system as in Claim 1 wherein said bearings reduce friction between the tapped-axle and the electric motor housing;
36) A linear transfer device as in Claim 1 wherein the reversible electric motor has the threaded rod fed through the full length of the tapped-axle of said motor, the threaded rod engages the tap of the tapped-axle and as the electric motor is energized the tapped-axle spins thus causing the motor to move along the threaded rod;
37) A linear transfer device as in Claim 1 wherein the tapped-axle of the reversible motor is allowed to spin in either direction depending on current flow thus controlling the direction of motion of the tapped-axle (hence the electric motor) along the threaded rod;
38) A linear transfer device comprising a longitudinal member, a device for generating rotational motion about an axle (such as an electric motor or a pneumatic motor) wherein said axle comprises a concentric hollow and tapped through-hole along the axis of rotation of the axle such that the tapped through-hole extends the full length of the axle and said longitudinal member penetrates and engages the centre core of the axle and extends beyond each end of the axle;
39) A linear transfer device as in Claim 38 wherein said longitudinal member is immobilized at each end such that the position of each end remains fixed;
40) A linear transfer device as in Claim 38 wherein said longitudinal member is restrained from rotation about its longitudinal axis;
41 ) A linear transfer device as in Claim 38 wherein said longitudinal member engages the axle of the device through the axial centre of the device's rotating axle;
42) A linear transfer device as in Claim 38 wherein rotational motion of the device is converted into linear motion of the device along the longitudinal member at the points of engagement between the longitudinal member and the axle-core of the device;
43) A linear transfer device as in Claim 38 wherein the longitudinal member may be solid or hollow, and resistant to deformation of shape if the application requires the longitudinal member to assist in the guiding functions as well as linear motion;
44) A linear transfer device as in Claim 38 wherein the longitudinal member may be solid or hollow, and flexible if the application requires the longitudinal member for purposes of linear motion and not guiding purposes;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2495472 CA2495472A1 (en) | 2005-01-28 | 2005-01-28 | Linear transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2495472 CA2495472A1 (en) | 2005-01-28 | 2005-01-28 | Linear transfer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2495472A1 true CA2495472A1 (en) | 2006-07-28 |
Family
ID=36702751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2495472 Abandoned CA2495472A1 (en) | 2005-01-28 | 2005-01-28 | Linear transfer device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2495472A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10975891B2 (en) | 2016-08-17 | 2021-04-13 | Project Phoenix, LLC | Motor operated accumulator |
-
2005
- 2005-01-28 CA CA 2495472 patent/CA2495472A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10975891B2 (en) | 2016-08-17 | 2021-04-13 | Project Phoenix, LLC | Motor operated accumulator |
| US11655831B2 (en) | 2016-08-17 | 2023-05-23 | Project Phoenix, LLC | Motor operated accumulator |
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