Magnetic drive motor assembly and related method of use

Abstract

To enhance operation of known magnetic motors for improving efficiency of power sources and enhancing the power output from such motors.SOLUTION: A camshaft arrangement for transforming a reciprocating input to a rotational output is provided. The camshaft arrangement comprises an output cam 200, 205 having a recessed track 125 to engage a cam roller 102 of a reciprocating shaft 106, where a force produced by the reciprocating shaft 106 fluctuates during a reciprocating stroke of the reciprocating shaft 106. The recessed track 125 of the output cam 200, 205 is dimensioned to reduce the fluctuation in the force produced by the reciprocating shaft 106 during the reciprocating stroke.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] Cross - Reference to Related Applications This application claims priority to currently pending U.S. Provisional Patent Application No. 62 / 977,568, filed on February 17, 2020, entitled "Magnetic Drive Motor Assembly and Related Methods of Use", the content of which is hereby incorporated by reference in its entirety.

Background Art

[0002] Magnetic drive motors are known in the art where a rotating set of magnets is affected by attractive and repulsive forces generated by opposing magnets. In one magnetic drive motor known in the art, permanent magnets rotate about an axis extending between opposing N and S poles. The magnetic field of the rotating permanent magnets interacts with the magnetic field of the permanent magnets supported by a magnetic shuttle for the purpose of repelling or attracting the fixed permanent magnets, thereby providing a linear reciprocating movement of the magnetic shuttle in response to the rotational movement of the rotating permanent magnets.

[0003] It is known in the art to utilize the direction of motion to convert linear motion into rotational motion or, alternatively, rotational motion into linear motion, but these conversions have inherent inefficiencies.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Accordingly, what is needed in the art is an improved system and method for improving the operation of known magnetic motors to improve the efficiency of the power source and the output from such motors.

Means for Solving the Problem

[0006] In various embodiments, the present invention provides a magnetic transmission that operates economically and efficiently to supply power to a load. Various embodiments provide an input camshaft device for converting rotary motion into reciprocating motion, and an output camshaft device for converting reciprocating motion into rotary motion.

[0007] In one embodiment for providing an efficient conversion of rotary motion into reciprocating motion, a camshaft device is provided for establishing the dwell time of a plurality of rotatable permanent magnets of a magnetic drive train. In this embodiment, the camshaft device comprises an input cam having a concave track that engages a cam roller of a crank arm, and further comprises one or more supports for attaching the input cam to a reciprocating shaft. The reciprocating shaft rotates a plurality of rotatable permanent magnets in response to the rotation of the crank arm, thereby providing a reciprocating stroke of a shuttle having a plurality of fixed permanent magnets. During operation, the concave track of the input cam is dimensioned to establish a desired dwell time of the plurality of rotatable permanent magnets during the reciprocating stroke of the shuttle.

[0008] In particular, the dwell time established by the concave track of the input cam is sufficient time for the shuttle to complete its reciprocating stroke. The dimensions of the concave track of the input cam effectively provide for alignment such that maximum magnetic interaction occurs between the plurality of rotatable permanent magnets of the shuttle and the plurality of fixed permanent magnets during the reciprocating stroke of the shuttle.

[0009] In a particular embodiment, the width of the concave track of the input cam at the 0° and 180° positions is substantially equal to the diameter of the cam roller. Also, the width of the concave track of the input cam at the 90° and 270° positions is substantially equal to the movement of the rotation of the crank arm.

[0010] By using an input cam with a concave track of appropriate dimensions, a continuous drive motor can be used to rotate a crankshaft connected to a crank arm, thereby eliminating the need to use a servo motor to control the reciprocating shaft and the timing of the shuttle movement.

[0011] In another embodiment for providing an efficient conversion of the reciprocating motion to a rotational motion, a camshaft device is provided for converting a reciprocating input to a rotational output. The camshaft device includes an output cam having a concave track that engages a cam roller of the reciprocating shaft. In this embodiment, the force generated by the reciprocating shaft varies during the reciprocating stroke of the reciprocating shaft, and the concave track of the output cam is dimensioned to reduce the variation in the force generated by the reciprocating shaft during the reciprocating stroke. , including a certain negative acceleration portion, a certain positive acceleration portion, and a certain constant velocity portion, wherein the negative acceleration portion has a shape that can vary the velocity so as to slow down the reciprocating shuttle velocity as the load approaches the end point of the reciprocating stroke Generally, the concave track of the output cam is dimensioned to maximize the conversion of the energy generated by the reciprocating stroke of the reciprocating shaft to a rotational output. , including a certain negative acceleration portion, a certain positive acceleration portion, and a certain constant velocity portion, having a shape that first provides a certain acceleration, then provides a certain constant velocity, and finally provides a certain negative acceleration for the remainder Dimensioned.

[0012] In a particular embodiment, the concave track of the output cam is dimensioned to provide a constant positive acceleration portion, a constant velocity portion, and a constant negative acceleration portion in order to maximize the conversion of the energy generated by the reciprocating stroke to a rotational output. More specifically, the constant positive acceleration portion in the concave track of the output cam constitutes approximately 20% of the concave track, the constant velocity portion in the concave track of the output cam constitutes approximately 50% of the concave track, and the constant negative acceleration portion in the concave track of the output cam constitutes approximately 30% of the concave track.

[0013] In another embodiment, the present invention provides a magnetic drive train device including a plurality of rotatable permanent magnets and a plurality of first rotating shafts. Each of the rotatable permanent magnets has an N pole and an opposite S pole arranged in a plane, and each of the plurality of rotatable permanent magnets is rotatable by one of the plurality of first rotating shafts about an axis between opposite magnetic poles in the plane. The magnetic drive train further includes a first reciprocating shaft connected to the plurality of first rotating shafts, a plurality of fixed permanent magnets fixed to the shuttle, and a shuttle arranged such that rotation of the plurality of rotatable permanent magnets causes alternating repulsive and attractive forces on the plurality of fixed permanent magnets to provide a reciprocating stroke of the shuttle parallel to the axis. The magnetic drive train further includes a crank arm having a cam roller disposed at a first end of the crank arm. To provide an efficient conversion of rotational motion to reciprocating motion, the magnetic drive train further includes an input cam connected to the first reciprocating shaft, the input cam having a concave track that engages the cam roller of the crank arm. Rotation of the crank arm provides a reciprocating stroke of the first reciprocating shaft perpendicular to the axis and a corresponding reciprocating stroke of the shuttle parallel to the axis, and the concave track is sized to establish a dwell time during the reciprocating stroke of the first reciprocating shaft. The magnetic drive train further includes a second reciprocating shaft connected to the shuttle, the second reciprocating shaft having a cam roller. To provide an efficient conversion of reciprocating motion to rotational motion, the magnetic drive train further includes an output cam having a concave track that engages the cam roller of the second reciprocating shaft, the force generated by the reciprocating shaft varying during the reciprocating stroke of the reciprocating shaft, and the concave track of the output cam being sized to reduce the variation in the force generated by the reciprocating shaft during the reciprocating stroke of the second reciprocating shaft.

[0014] In various embodiments of the present invention, an input cam and an output cam are provided to improve the operation of a known magnetic motor for the purpose of improving the efficiency of a power source and enhancing the output from a known motor.

[0015] To more fully understand the present invention, reference should be made to the following detailed description in connection with the accompanying drawings.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Best Mode for Carrying Out the Invention

[0017] Hereinafter, the present invention will be more fully described with reference to the accompanying drawings showing exemplary embodiments of the present invention. However, the illustrated embodiments are not intended to be limiting, and are provided to make the present disclosure detailed and complete and to fully convey the scope of the present invention as understood by those skilled in the art. Like numbers refer to like elements throughout the drawings and the accompanying detailed description.

[0018] In various embodiments, the present invention provides an input and output camshaft apparatus for converting between reciprocating magnetic drive motion and rotational magnetic drive motion in an efficient drive train.

[0019] The first embodiment provides an improvement to an input cam for driving the rotational motion of an efficient drive train. As shown in FIG. 1, in one embodiment of the present invention, a magnetic transmission for motion conversion includes an improved drive train comprising a plurality of rotatable permanent magnets 124, 126, 128, 130 coupled to a reciprocating shaft 106. This embodiment further includes a camshaft apparatus including an input cam 100 for controlling the placement and dwell time of the plurality of rotatable permanent magnets 124, 126, 128, 130. Each of the rotatable permanent magnets 124, 126, 128, 130 includes an N pole and an opposing S pole and is rotatable about a common axis. The rotatable permanent magnets 124, 126, 128, 130 are rotated about the common axis using an input cam 100, a crank arm 101, and a cam roller 102 driven by a continuous drive motor 120. The electric motor 120 is coupled to an output shaft 123, which is coupled to the crank arm 101 to move the rotatable permanent magnets 124, 126, 128, 130 using the linear shaft 106. The revolutions per minute (rpm) of the continuous drive motor 120 can be reduced using a gear reducer 122. A torque transducer 121 is used to measure the input torque during testing. The cam roller 102 of the crank arm 101 is disposed within a concave track 125 provided in the input cam 100. The concave track 125 is dimensioned to establish the dwell time of the plurality of rotatable permanent magnets 124, 126, 128, 130 during the reciprocating stroke of a shuttle (not shown in this figure).

[0020] During operation, when the continuous drive motor 120 drives the crank arm 101 using the output shaft 123, the cam roller 102 follows along the concave track 125 provided in the input cam 100, whereby the linear shaft 106 moves linearly back and forth. As a result, the rotatable permanent magnets 124, 126, 128, 130 rotate 180° as the linear shaft 106 moves and then reverse 180°.

[0021] An additional view of the magnetic transmission is shown in FIG. 2. FIG. 2 more clearly illustrates the output shaft 130 that is connected to the crank arm 101 and driven by the electric motor 120 so as to act on the reciprocating motion of the linear shaft 106 and the corresponding rotation of the rotatable permanent magnets 124, 126, 128, 130. As shown in FIG. 2, the rotational movement of the rotatable permanent magnets 124, 126, 128, 130 is achieved by using a gear 135 that engages with the gear rack 106 and rotating the first and second rotatable permanent magnets 124, 128 around the first common axis 140 and rotating the third and fourth rotatable permanent magnets 126, 130 around the second common axis 141.

[0022] FIG. 3 shows a magnetic drive system further including a magnetic shuttle 150 restricted to linear reciprocating movement substantially parallel to a first common axis 140 and a second common axis 141. A plurality of fixed permanent magnets 174, 176, 178, 180 are fixed to the magnetic shuttle 150. In this embodiment, the first fixed permanent magnet 174 is disposed opposite the first rotatable permanent magnet 124, the second fixed permanent magnet 176 is disposed opposite the second rotatable permanent magnet 126, the third fixed permanent magnet 178 is disposed opposite the third rotatable permanent magnet 128, and the fourth fixed permanent magnet 180 is disposed opposite the fourth rotatable permanent magnet 130. As shown, the first and second fixed permanent magnets 174, 176 and the third and fourth fixed permanent magnets 178, 180 are fixed to opposite first and second side surfaces of the magnetic shuttle 150. In addition, each of the fixed permanent magnets 174, 176, 178, 180 has an N pole and an S pole. These magnets are arranged such that the rotation of the rotatable permanent magnets 124, 126, 128, 130 coincides with the repulsive and attractive forces of the fixed permanent magnets 174, 176, 178, 180 of the magnetic shuttle 150 to cause the reciprocating movement of the magnetic shuttle 150. During operation, the electric motor 120 rotates the rotatable permanent magnets 124, 126, 128, 130, which acts on the linear movement of the fixed permanent magnets 174, 176, 178, 180 and the reciprocating movement of the magnetic shuttle 150.

[0023] The exemplary embodiments shown in FIGS. 1 - 3 show a determined number of rotatable permanent magnets and fixed permanent magnets, but are not limited thereto, and any number of magnets are within the scope of the present invention. In addition, although this embodiment has described an electric motor, it is well understood that other well-known means for driving the rotation of the magnets can be employed without departing from the present invention.

[0024] To maximize the amount of energy transferred from rotation to linear (reciprocating) motion, it is desirable that the dwell time be sufficient for the magnetic shuttle 150 to complete its reciprocating stroke when the rotatable permanent magnets 124, 126, 128, 130 are rotated 180°. To hold the rotatable permanent magnets 124, 126, 128, 130 in a fixed position when the magnetic shuttle 150 completes its stroke, the use of an intermittent drive device, or a servo motor, is known in the art, but the use of an intermittent drive device is undesirable because it is more expensive and complex than a continuous drive motor.

[0025] To overcome the need for an intermittent drive device or a servo motor, in this embodiment, the input cam 100 provides the dwell time, thereby enabling the use of a standard AC motor 120 that supplies continuous input rotation to the rotatable permanent magnets 124, 126, 128, 130. The use of an input cam 100 with a concave track 125 of appropriate dimensions and a continuous drive motor 120 reduces the energy required and the cost of the magnetic drive assembly.

[0026] Referring to FIG. 4, the shape of the concave track 125 of the input cam 100 establishes the dwell time of the rotatable permanent magnets 124, 126, 128, 130 when driven by the continuous motor 120. The legs 165, 167 of the input cam 100 are configured to be attached to the linear shaft 106 that rotates the rotatable permanent magnets 124, 126, 128, 130. The design of the concave track 125 provides a sinusoidal motion that minimizes movement at the end of the stroke of the magnetic shuttle 150, thereby providing the dwell time necessary to maximize the energy transferred. A specific dwell time can be controlled by the physical shape of the concave track 125 of the input cam 100.

[0027] When determining the dimensions of the concave track 125 of the input cam 100, the load and speed of the magnetic shuttle 150 must be considered because the residence time should match the travel time of the magnetic shuttle 150. More importantly, the residence time established by the concave track 125 should be sufficient to enable the magnetic shuttle 150 to be aligned such that maximum magnetic interaction occurs between the rotatable permanent magnets 124, 126, 128, 130 and the fixed permanent magnets 174, 176, 178, 180 as the magnetic shuttle 150 moves along its stroke. Generally, the dimensions of the concave track 125 can vary based on the specific application. In particular, the concave track 125 is dimensioned to have a portion 425 that establishes the required residence time.

[0028] In a particular embodiment, the residence time provided by the input cam 100 can be achieved by matching the widths 405 of the concave track 125 at the 90° position 400 and the 270° position 415 to the rotational movement of the crank arm 101. As shown in FIG. 4, the widths of the concave track 125 of the input cam 100 at the 0° position 400 and the 180° position 410 are substantially equal to the diameter of the cam roller 102, and the widths of the concave track 125 at the 90° 405 and 270° positions 415 are substantially equal to the rotational movement of the crank arm 101.

[0029] FIG. 5 shows a more detailed view of the camshaft 123, the cam arm 101, and the cam roller 102 of the present invention. As shown in FIG. 5, the camshaft 123 is driven by the output from the gear reducer 122. The cam roller 102 is disposed within the concave track 125 of the input cam 100 as previously described with reference to FIGS. 1 - 4. The rotational movement of the crank arm 101 is determined as the distance 500 from the center of the crank arm 101 to the outer diameter of the cam roller 102. In addition, the distance reached by the rotation of the cam is the travel distance of the cam arm 101, which is twice the distance 505 from the center of the crankshaft 102 to the center of the cam roller 102 on the crank arm 101.

[0030] Thus, as shown in FIGS. 1-5, in one embodiment, the present invention uses an input cam 100 and a continuous drive motor 120 to provide an improved magnetic drive train that captures the maximum amount of energy when converting the rotational movement of rotatable permanent magnets 124, 126, 128, 130 into the reciprocating movement of a magnetic shuttle 150.

[0031] In a second embodiment, the reciprocating linear movement of the magnetic shuttle 150 can be converted back into a rotational movement. As shown in FIG. 6, two output cams 200, 205 are coupled to the magnetic shuttle 150 using shuttle mounting brackets 210, 215. In particular, the shuttle mounting brackets 210, 215 are attached to the magnetic shuttle 150 on one side of the shuttle bracket 150 as shown in FIG. 3. During operation, the cams 200, 205 are used to capture energy from the magnetic drive linear shuttle 150.

[0032] As shown in FIG. 6, an output shaft 240 is driven by the rotational movement of the two output cams 200, 205. The movement of the magnetic shuttle 150 causes a linear movement of linear input shafts 220, 222, which are respectively coupled to each of the two output cams 200, 205. The linear input shafts 220, 222 each include cam rollers 225, 227 disposed in respective concave tracks 230, 232 in the corresponding output cams 200, 205. The dimensions of the concave tracks 230, 232 of the output cams 200, 205 control the movement of the output shaft 240.

[0033] The purpose of the shape of the concave tracks 230, 232 provided by the output cams 200, 205 is to enable efficient capture of the energy of the linear motion of the magnetic shuttle 150 powered by the interaction between the permanent magnet of the magnetic shuttle 150 and the rotatable permanent magnet, as described above with reference to the first embodiment. The force curve of a linear motion magnetic system such as the magnetic shuttle 150 is affected by the magnetic gap as it moves along its path. The desired output for a given application varies, and the design of the concave tracks 230, 232 of the output cams 200, 205 allows for modification of the output force and speed. Thus, the inertia, speed, and magnetic force of the mechanical system can be controlled by the shape of the concave tracks 230, 232 of the output cams 200, 205.

[0034] In the embodiment shown in FIG. 6, the output shaft 240 is perpendicular to the movement of the linear shafts 220, 222. However, as shown in FIG. 7, there may be cases where it is desirable to change the orientation so that it lies in the same plane as the linear motion of the axes of the linear shafts 220, 222. To achieve the configuration shown in FIG. 7, barrel-shaped output cams 270, 272 may be used in a multi-axis manner. In this embodiment, the barrel cams 270, 272 rotate the output shaft 240, and each of the barrel cams 270, 272 is driven by a combination of drive gears 255, 257, shaft rotation gears 250, 252, fixed magnets 260, 262, and rotating magnets 265, 267. As in the embodiment shown in FIG. 6, the cam rollers 290, 292 of the embodiment of FIG. 7 trace along the concave tracks of the barrel output cams 270, 272 to provide the desired speed output.

[0035] The relationship between one of the cams, cam rollers, and the linear shaft 220 of the output cam 200 of FIG. 7 is more clearly shown in FIG. 8. As shown in FIG. 8, the output shaft 240 is driven by the output cam 200, and the rotational motion of the output cam 200 is provided by the cam roller 235 of the linear shaft 220 moving along the concave track 230 of the output cam 200.

[0036] FIG. 9 additionally shows an exemplary shape of the concave track 230 of the output cam 200. In the present invention, the concave tracks 230, 232 of the output cams 200, 205 are dimensioned to capture the energy of the magnetic shuttle 150 and transmit it into rotational movement. The movement of the shuttle is caused by magnetic force, and the force curve during its stroke is "U"-shaped. The resulting force curve is inherent to the magnetic system and may cause mechanical failure at the end of the stroke where the force peaks and becomes overloaded. As described above, when the output cams 200, 205 are not used, the resulting force curve is not flat, but instead reaches its lowest level near the center of the stroke of the magnetic shuttle 150 and its peak level at the end of the stroke. This is not ideal, and it is desirable to obtain a constant force curve from the movement of the magnetic shuttle 150. In the present invention, the output cams 200, 205 are introduced to help the output force curve become constant.

[0037] The dimensions of the concave track 230 of the output cam 200 shown in FIG. 9 are a constant negative acceleration portion 300, a constant positive acceleration portion 305, and a constant velocity portion 310. The negative acceleration portion 300 of the concave track 230 needs to change the velocity so that the load can slow down the shuttle velocity as it approaches the end of the stroke. Thus, the inertia of the moving load is part of the design of the slope of the concave track at the end of the stroke. Additionally, the center of the stroke is where the magnetic force is minimum, and it is desirable for the slope of the concave track of the cam to be at a constant velocity in this region (portion) of the track. In a particular embodiment, assuming the input movement that rotates the magnet is 180°, the concave tracks of the output cams 200, 205 determine the magnetic drive ratio (angle per stroke).

[0038] The concave tracks shown in FIGS. 8 and 9 illustrate these desired conditions. Additionally, the output cams 200, 205 prevent the magnetic shuttle 150 from drifting from the end point of the stroke because they rotate the magnet for the next stroke. This is important to maximize the effectiveness of the full stroke of the magnetic shuttle 150. Generally, the shape of the protruding portion in the concave track of the output cam is a variable determined based on the application and the size of the magnet, along with the stroke of the magnetic shuttle.

[0039] The output cams 200, 205 as shown in the exemplary embodiment provide a constant acceleration for the first 20% of the shuttle stroke, a constant velocity through the next 50%, and a constant negative acceleration for the remaining 30%. However, these parameters can be changed according to the application while providing the same result of maximizing the shuttle energy and applying the energy utilized to the rotational output.

[0040] In the present invention, the output cam is used to provide a constant force curve and change the velocity at the end point of the reciprocating stroke. The end point of the reciprocating stroke is the peak of the force curve, which increases the velocity if there is no change in the load. In contrast to many cam designs that form a concave track to provide a preferred output motion, in the present invention, the concave track of the cam is formed to control the output force and the input velocity.

[0041] Furthermore, in either of the embodiments shown in FIGS. 7 or 8, by adding a flywheel load to store energy, the velocity at the highest energy portion of the linear stroke is reduced. The use of the flywheel improves the reliability and efficiency of the linear system. The energy that reduces the velocity is stored in the flywheel for output.

[0042] It can be seen that the above advantages, as well as the advantages that become apparent from the above description, are efficiently achieved. Since it is possible to make specific changes to the above configuration without departing from the scope of the present invention, all matters included in the above description or shown in the accompanying drawings are intended to be construed not in a limiting sense but as illustrative.

[0043] It should also be understood that the following claims are intended to cover all of the general and specific features of the present invention described herein, and all descriptions of the scope of the present invention that can be said to be applicable between them as a matter of language. The present invention has been described above.

Industrial Applicability

[0044] The magnetic drive motor assembly of the present invention can be used for various devices that are rotationally driven.

Explanation of Reference Numerals

[0045] 102 Cam roller 106 Reciprocating shaft 125 Concave track 200, 205 Output cam

Claims

1. 1. A camshaft apparatus for converting a reciprocating motion input into a rotational output, the camshaft apparatus comprising: an output cam having a recessed track for engaging a cam roller of a reciprocating shaft, the force generated by the reciprocating shaft varying during a reciprocating stroke of the reciprocating shaft; a camshaft arrangement, wherein the concave track of the output cam includes a constant negative acceleration portion, a constant positive acceleration portion and a constant velocity portion to reduce the variation in the force generated by the reciprocating shaft during the reciprocating stroke, the negative acceleration portion being sized with a velocity varying shape to slow the reciprocating shuttle velocity as the load approaches the end of the reciprocating stroke.

2. 1. A camshaft apparatus for converting a reciprocating motion input into a rotational output, the camshaft apparatus comprising: an output cam having a recessed track for engaging a cam roller of a reciprocating shaft, the force generated by the reciprocating shaft varying during a reciprocating stroke of the reciprocating shaft; a camshaft arrangement, wherein the concave track of the output cam is sized with a velocity varying shape including a constant negative acceleration portion, a constant positive acceleration portion and a constant velocity portion to maximize conversion of energy generated by the reciprocating stroke of the reciprocating shaft into rotational output, first providing constant acceleration, then providing constant velocity, and the remainder providing constant negative acceleration.

3. 3. The camshaft arrangement of claim 1 or 2, wherein the constant positive acceleration portion of the concave track of the power cam comprises approximately 20% of the concave track.

4. 3. The camshaft arrangement of claim 1 or 2, wherein the constant velocity portion of the concave track of the power cam constitutes approximately 50% of the concave track.

5. 3. The camshaft arrangement of claim 1 or 2, wherein the constant negative acceleration portion of the concave track of the power cam comprises approximately 30% of the concave track.

6. 3. The camshaft arrangement of claim 1 or 2, further comprising a shuttle coupled to the reciprocating shaft, the shuttle having a plurality of fixed permanent magnets arranged such that rotation of a plurality of rotatable permanent magnets causes alternating repulsive and attractive forces on the plurality of fixed permanent magnets to effect the reciprocating stroke of the reciprocating shaft.

7. an output shaft coupled to the output cam, the output shaft being rotated by the output cam in response to the reciprocating stroke of the reciprocating shaft; The camshaft assembly according to claim 1 or 2, further comprising: a flywheel coupled to the output shaft.

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