TWI743002B - Magnetic control device that can directly measure the value of motion load - Google Patents

Abstract

A magnetic control device that can directly measure the value of exercise load is applied to fitness exercise equipment. It includes: a support frame, an axis, a flywheel, a magnetoresistive mechanism, an action rod, a beam load cell, and a Control circuit unit: After calculating the set torque value, the control circuit unit will generate a moderate current, which is input into the electromagnetic coil of the reluctance mechanism, and the current will form an eddy current on the brake iron core, which will affect the rotation of the flywheel A resistance is caused, and the resistance will drive the magnetic resistance mechanism to float and pivot, and the resistance is applied to the beam load cell by the lever, the control circuit unit will repeatedly capture the resistance value to compare the desired torque After the value, the delivered current is further changed to make the actual load achieve the desired torque value.

Description

Magnetic control device that can directly measure the movement load value

The present invention relates to a fitness exercise equipment device, especially a magnetic control device that connects a beam-type load cell with a magnetoresistive mechanism to achieve the desired exercise load effect, which can directly measure the exercise load value.

According to, many fitness equipment will be equipped with a flywheel to increase its rotational inertia, and the flywheel can also be used as a load to achieve fitness effects; in recent years, flywheels are used to install permanent magnets as rotors, and armatures are used as stators to generate alternating current from the stator coils. This current is then used as the power required to control and brake the load; this type of patent is found in U.S. No. 6,084,325 "BRAKE DEVICE WITH A COMBINATION OF POWER-GENERATING AND EDDY-CURRENT MAGNETIC RESISTANCE), as shown in Figures 1-1 and 1-2; in the figure, the rotating wheel A of the sports equipment drives the flywheel 820 to rotate. The permanent magnet 821 attached to the flywheel 820 and the stator core 830 form a magnetic circuit, so that the coil 831 generates current The current is converted into DC by the rectifier & filter circuit 860, one is supplied to the control instrument 890 via the DC power supply 870; the other is supplied to the brake core 850 located on the side of the flywheel 820 via the adjustable DC power supply 880, so that the The brake core 850 forms an eddy current (EDDY CURRENT), thereby causing a magnetic resistance effect on the flywheel 820.

In addition, the aforementioned patent uses the kinetic energy applied by the user to the sports equipment to make the power generation mechanism generate electricity, and then the electricity is fed back to the magnetoresistive mechanism to generate magnetic resistance to form a load for movement; However, the large current and large magnetic resistance generated by the mechanism are suitable for installation on larger sports equipment or sports equipment with more control functions; on the contrary, sports equipment that requires small current and small magnetic resistance, if the above The patented device has doubts about investing too much resources; therefore, if the kinetic energy load can be reduced, its volume is reduced, and the manufacturing cost can be reduced, the magnetoresistive mechanism should be integrated and applied to small sports equipment. It is the goal of this creator’s research and development.

Press again, the control instrument 890 in the aforementioned patent converts the set torque value into a current level and supplies the brake iron core 850 to cause magnetic resistance to the flywheel 820; however, the device does not have a torque value detection mechanism. There is a more or less gap between the magnetic resistance and the set value, which will cause confusion to the user about the effect of the exercise; therefore, a feedback device for torque detection is added to enhance the user’s grasp and trust in sports equipment , Will be the subject of further improvement for this creator.

The reason is that the main purpose of the present invention is to provide an eddy current magnetic resistance braking device that can apply the magnetic resistance mechanism to small fitness equipment.

The secondary objective of the present invention is to provide a magnetic control device capable of directly measuring the value of the moving load by connecting the load cell with the magnetoresistive mechanism to achieve the desired moving load effect.

To achieve the above objective, the technical means adopted by the present invention include: a support frame, an axis, a flywheel, a magnetoresistive mechanism, an action rod, a beam load cell, and a control circuit unit; wherein, the The support frame has a front and a back plate body, which are combined into one body by a plurality of positioning rods, each of which is provided with a shaft hole at the upper end, and the support frame is provided with a foot seat for fixing on the frame body of the fitness exercise equipment ; The shaft is pivoted in the shaft hole to receive the power transmitted by the fitness exercise equipment; the flywheel is a disc body with a hub in the center and an outer ring on the periphery, and the hub has a shaft hole to It is sleeved on the shaft, and the flywheel is driven by the shaft to rotate; the reluctance mechanism includes a coil movable frame, which is pivoted on the periphery of the hub, and a stator is fixed on the coil to move. On the outer edge of the frame, the ring is provided with a plurality of brake iron cores, the brake iron core is provided with a accommodating part for sheathing the electromagnetic coil, and an input wire connected to the electromagnetic coil; the action rod is fastened to the The magnetoresistive mechanism is outside, and its end has a pressing part; the beam-type load cell has its inner end locked to the support frame through a load cell bracket, and its outer end is fixedly connected to the pressing part; The control circuit unit is assembled on the side of the support frame in a built-in form, and it at least includes a microcomputer control instrument, a torque value conversion unit, and a power control unit And a DC power supply connected to an AC power supply, the control circuit unit can be used to input the desired torque value, and is electrically connected to the input wire of the electromagnetic coil and the beam load cell.

According to the principle of the beam load cell, when one end of the application mechanism is subjected to shearing force, the elastic body of the mechanism will produce shear strain, and its strain will change the resistance value attached to the mechanism; because the system applies a fixed power supply Voltage, therefore, the partial pressure passing through the beam load cell changes accordingly. After the changed partial pressure value is measured, the signal can be amplified and calculated to convert it into the shear force that the mechanism bears, that is, the load value. The principle of the beam load cell is not the focus of this creation. However, the inventor cleverly installed the mechanism under the operating rod, which is to use the beam load cell to connect the magnetoresistive mechanism to drive the sensing element. At this time, the shearing force of the elastic body can be sensed and converted into a load value, and then transmitted to the system to achieve the control effect.

In this way, the control circuit unit will calculate the desired torque value, generate a control signal and then form a moderate current, and synchronously input the electromagnetic coil of the magnetoresistive mechanism, then the current of the electromagnetic coil will be in the An eddy current is formed on the brake core, which in turn causes a resistance to the rotation of the flywheel, and the resistance will drive the reluctance mechanism to float and pivot, and the resistance will be applied to the beam load cell by the action rod, then The control circuit unit repeatedly captures the resistance value to compare the desired torque value, and then further changes the delivered current, so that the actual load reaches the desired torque value.

According to the features disclosed above, the present invention further includes at least one ball bearing, which is installed between the coil movable frame and the hub of the flywheel, so that the coil movable frame can float and pivot relative to the flywheel.

According to the features of the foregoing disclosure, the present invention further includes a pulley, which is installed on the shaft outside the support frame to transmit the power sent by the fitness exercise equipment to the shaft.

With the help of the aforementioned features, the "magnetic control device capable of directly measuring the motion load value" of the present invention has the following benefits:

(1) In the present invention, the flywheel system is driven by the axis to rotate, and the reluctance mechanism is arranged in the outer ring of the flywheel. The inner periphery has a plurality of brake cores and electromagnetic coils; since the reluctance mechanism of the present invention is arranged at the inner periphery of the flywheel, it can simplify the mechanism, reduce the volume, reduce the manufacturing cost, and make it applicable to small fitness Sports equipment; At the same time, the present invention controls the magnetoresistive load by the magnitude of the current applied to the electromagnetic coil. Since the mechanism is a non-contact resistance device, the present invention also has easy control of resistance, and no wear of components. The advantage of lower maintenance costs.

(2) The present invention includes a flywheel that provides inertial rotation, and the reluctance mechanism is arranged on the inner periphery of the outer ring of the flywheel; a moderate current is input to the electromagnetic coil of the reluctance mechanism, and the current will be on the brake core An eddy current is formed, which in turn causes a resistance to the rotation of the flywheel; since the brake iron core is ringed at the inner periphery of the flywheel, the resistance of the eddy current will be evenly distributed on the inner periphery of the flywheel, so the present invention can achieve symmetry and smoothness The load effect.

(3) The microcomputer control instrument in the present invention is equipped with an input unit for inputting the desired torque value. The microcomputer will generate a moderate current through the torque value conversion unit to the electromagnetic coil of the reluctance mechanism to make it brake An eddy current is formed on the iron core, which then generates a resistance to the rotation of the flywheel and acts on the magnetoresistive mechanism; because a beam load cell is connected to the magnetoresistive mechanism through an acting rod to measure its resistance, the control circuit unit is The resistance is repeatedly captured to compare the desired torque value, and then the delivered current is further changed, so that the load value reaches the desired torque value. Because the beam load cell is used as the actual load sensing device and the control circuit in the present invention The unit will use the feedback signal to correct the magnitude of the current it delivers, so the accuracy of its load can be improved to more than 95%, so that the present invention truly meets the user's exercise benefit.

10: Support frame

11: Front plate body

12: Rear plate body

13: Shaft hole

14: positioning hole

15: Feet

16: slot

17: positioning rod

20: flywheel

21: Outer ring

22: inner wall

23: Wheel hub

24: Shaft hole

25: Ball bearing

30: axis

33: bearing seat

34: Ball bearing

40: Pulley

50: Magnetoresistive mechanism

51: Coil movable frame

52: stator

53: Brake Core

54: Electromagnetic coil

55: penetration hole

60: Acting lever

61: Pressure Department

62: Positioning Department

63: positioning hole

64: screw

65: Screw

70: Beam load cell

71: Load element bracket

72: Load value

80: control circuit unit

81: Microcomputer control instrument

82: Torque value conversion unit

83: Power Control Unit

84: DC power supply

100: Magnetic control device that can directly measure the value of the motion load

P: resistance value

δ: Shear strain

Figure 1-1 is a front view of a conventional hybrid brake device combining power generation and eddy current reluctance.

Figure 1-2 is a schematic diagram of the overall control of a conventional hybrid brake device for power generation and eddy current reluctance.

Figure 2A is an exploded perspective view of the structure of the present invention.

Fig. 2B is a perspective view of the structure of the acting rod in the present invention.

Fig. 2C is a perspective view of the related structure for measuring the motion load value in the present invention.

Figure 2D is a three-dimensional view of the structure of the invention for measuring the motion load value.

Figure 3 is a perspective view of the structure of the present invention.

Figure 4 is a side view of the structure of the present invention.

Fig. 5 is a cross-sectional view of Fig. 4 in the present invention.

Fig. 6A is a front view of the structure assembly of the present invention.

Fig. 6B is a schematic view of the floating pivot structure of the magnetic resistance mechanism of the present invention.

Figure 6C is a schematic diagram of the load cell bearing load in the present invention.

Fig. 7A is the first cross-sectional view of Fig. 6A in the present invention.

Fig. 7B is the second cross-sectional view of Fig. 6A in the present invention.

Figure 8 is a schematic diagram of the overall control in the present invention.

The following description uses the drawings as an embodiment, but is not limited thereto. The present invention can be implemented in other embodiments, and the well-known steps or elements are not described in the details, so as to avoid unnecessary limitations on the present invention. . It should be noted that the drawings are for illustrative purposes only, and do not represent the actual size or quantity of the components. Some details may not be completely drawn in order to keep the drawings concise.

First, please refer to FIG. 2A, which is the structure of the "Magnetic Control Device for Directly Measuring the Motion Load Value" 100 of the present invention, which includes a support frame 10, a flywheel 20, an axis 30, and a magnetoresistive mechanism 50 , An action rod 60, a beam load cell 70, and a control circuit unit (not shown); wherein, the support frame 10 is assembled by the front and rear plate bodies 11, 12, and the upper end of the plate body is each A shaft hole 13 is provided, and a plurality of positioning holes 14 corresponding to the front and rear are respectively provided on the board body, and a plurality of positioning rods 17 are individually inserted into the positioning holes 14 and locked with a nut to make the front and rear plates The bodies 11 and 12 are combined into one body, and the lower end of the plate body is each provided with a foot base 15, and the support frame 10 can be fixed to the fitness body by means of bolts locking the slots 16 On the frame of sports equipment; the flywheel 20 is a disk that provides an inertial rotation, with an outer ring 21 and an inner side wall 22, and a hub 23 with a shaft hole 24 is formed at the center of the inner side wall 22; The shaft 30 is a shaft for transmitting power. Its middle section will penetrate into the shaft hole 24 of the flywheel 20. Both ends of the shaft 30 are respectively combined with a ball bearing 34 to penetrate a bearing housing 33, and the outer end of the shaft passes through A key is connected to a pulley 40 for receiving the power transmitted by the fitness equipment and driving the flywheel 20 and the shaft 30 to rotate synchronously.

In addition, the reluctance mechanism 50 includes a coil movable frame 51 and a stator 52 fixed on its outer edge. The stator 52 is ringed with a plurality of brake cores 53, and the brake core 53 is provided with a accommodating part. It is used to cover the electromagnetic coil 54 with an input wire (not shown), one end is connected to the DC power supply, and the other end is connected in series with the electromagnetic coil 54. The input current will form an eddy current on the brake core 53 (EDDY CURRENT) The coil movable frame 51 has a through hole 55, which is sleeved on the outer edge of the hub 23 of the flywheel 20, so that the reluctance mechanism 50 is pivoted on the inner edge of the outer ring 21 of the flywheel 20, due to the eddy current being The rotating flywheel is broken to produce a resistance and act on the magnetoresistive mechanism 50; the acting rod 60 has a pressing portion 61, which is locked on the outer side of the magnetoresistive mechanism 50 with a screw 65 so that it can be Driven to float and pivot in synchronization with the magnetoresistive mechanism 50; the beam load cell 70 is locked on the support frame 10 through a load cell bracket 71, and its outer end is connected to the pressing portion 61 of the acting rod 60 Therefore, the resistance value will be measured by the beam load cell 70 via the acting rod 60.

Figures 2B~2D show the combined state of the acting rod 60 and the magnetic resistance mechanism 50 in the present invention; wherein the acting rod 60 has a pressing portion 61 and an arc-shaped positioning portion 62, and the positioning portion 62 is provided with a plurality of positioning holes 63 (Figure 2B), when the acting rod 60 is locked on the side edge of the stator 52 with a screw 65, and then the beam load cell 70 is connected to the acting rod 60 with a screw 64 After the pressing portion 61, when the magnetoresistive mechanism 50 suffers resistance and generates a floating pivot, the acting rod 60 will also be driven to float and pivot, and the floating force will be applied to the beam load cell 70 ( Figure 2C~2D).

Please further refer to Figures 3 to 5, which are the combined state of the structure of the present invention. As can be seen from the drawings, the stator 52 includes a plurality of brake cores 53 and electromagnetic coils 54, which are fixed on the wire by screws. The outer edge of the movable frame 51 is formed to form the magnetic resistance mechanism 50; then the penetration hole 55 of the movable frame 51 of the coil is sleeved on the periphery of the hub 23 of the flywheel 20, so that the magnetic resistance mechanism 50 surrounds the outer ring of the flywheel 20 21 inner edge pivoting; the present invention further includes a ball bearing 25, which is installed between the through hole 55 of the coil movable frame 51 and the hub 23, so that the coil movable frame 51 can float relative to the flywheel 20 Pivot; continue, insert the shaft 30 into the shaft hole 24 of the flywheel 20, and insert a key block into the middle section so that the shaft 30 and the flywheel 20 can rotate synchronously; and then the shaft 30 is located on the flywheel 20 A ball bearing 34 is sleeved on both sides of the wheel hub 23, and a bearing seat 33 is sleeved on the outer circumference of the ball bearing 34, and then the bearing seat 33 is inserted into the shaft holes 13 of the front and rear plate bodies 11 and 12 respectively. And bolts are inserted into the positioning holes 14 of the front and rear plates 11, 12 to lock the bearing seat 33, and then a plurality of positioning rods 17 are inserted into the positioning holes 14 and locked with a nut to make the shaft The core 30, the flywheel 20, and the magnetoresistive mechanism 50 are combined and positioned in the front and rear plate bodies 11, 12 to form an integrated body; furthermore, the pulley 40 is inserted into the outer end of the shaft core 30 with a key block, and the After the positioning portion 62 of the acting rod 60 is screwed to the side edge of the stator 52, the beam load cell 70 is locked on the support frame 10 through a load element bracket 71, and finally the acting rod 60 The pressing portion 61 is locked on the outer end of the beam load cell 70, which completes the mechanism assembly of the present invention.

Figures 6A to 6C and Figures 7A to 7B show the state of the present invention when a moving load is applied. In the drawings, the coil movable frame 51 of the magnetoresistive mechanism 50 has a through hole 55 connected to a ball bearing 25 and It is sleeved on the periphery of the hub 23 of the flywheel 20, so the reluctance mechanism 50 can pivot freely relative to the flywheel 20 (FIG. 7A); the stator 52 of the reluctance mechanism 50 is provided with a plurality of brake cores 53 and electromagnetic coils 54, When the DC current is sent to the electromagnetic coil 54, an eddy current will be formed on the brake core 53; because the shaft 30 is driven by the power transmitted by the fitness equipment to drive the flywheel 20 to rotate synchronously, the eddy current will be rotated by the flywheel When a resistance is generated by the destruction and acts on the magnetoresistive mechanism 50, the magnetoresistive mechanism 50 will therefore generate a resistance value P which is applied to the acting rod 60 connected to it (FIG. 7B), and the resistance value P will further pass through it. The pressing portion 61 reacts to the beam load cell 70, and makes one end of it bear the shearing force, thereby causing the elastic body of the beam load cell 70 to generate a shear strain δ (FIG. 7C), and the amount of strain will be Be converted The load value is transmitted to the control circuit unit 80 via the electrical connection.

FIG. 8 is a schematic diagram of the control of the present invention, in which the control circuit unit 80 is assembled on the side of the support frame 10 in a built-in form, and it includes at least a microcomputer control instrument 81 and a torque value conversion unit 82. A power control unit 83, and a DC power supply 84 connected to AC power. The microcomputer control instrument 81 is provided with an input unit for inputting the desired torque value, and is electrically connected to the input wire of the solenoid 54 and The beam type load cell 70. Thereby, the control circuit unit 80 will calculate the desired torque value, and then generate a control signal to form a moderate current, which is synchronously input to the electromagnetic coil 54 of the magnetoresistive mechanism 50, and the electromagnetic coil 54 The current will form an eddy current (EDDY CURRENT) on the brake core 53; because the flywheel 20 is in a rotating state, when the eddy current is damaged by the rotating flywheel 20, a resistance will be generated to resist, and the resistance will drive the magnetic The resistance mechanism 50 floats and pivots, and the resistance value is applied to the beam load cell 70 by the action rod 60, and the control circuit unit 80 will repeatedly capture the resistance or the load value 72 to compare the desired torque. After the value, the delivered current is further changed to make the actual load achieve the desired torque value.

According to the present invention, the flywheel 20 is driven by the shaft 30 to rotate. The reluctance mechanism 50 is arranged on the inner edge of the outer ring 21 of the flywheel 20, and it has a plurality of brake cores 53 and electromagnetic coils 54; The magnetoresistive mechanism 50 in the invention is arranged at the inner periphery of the flywheel 20, so that the mechanism can be simplified, the volume is reduced, and the manufacturing cost can be reduced, and it can be applied to small fitness equipment; The current on the electromagnetic coil 54 controls the magnetoresistive load. Since the mechanism is a non-contact resistance device, the present invention also has the advantages of easy resistance control, no wear of components, and low maintenance cost.

Secondly, the present invention includes a flywheel 20 that provides inertial rotation, and the magnetic resistance mechanism 50 is arranged on the inner periphery of the outer ring 21 of the flywheel 20; a moderate current is input to the electromagnetic coil 54 of the magnetic resistance mechanism 50, then The current will form an eddy current on the brake core 53, which will cause resistance to the rotation of the flywheel 20; since the brake core 53 is ringed at the inner periphery of the flywheel 20, the resistance of the eddy current will be equal It is evenly distributed on the inner circumference of the flywheel 20, so the present invention can achieve a balanced and smooth load effect.

Press again, the microcomputer control instrument 81 of the present invention is provided with an input unit for inputting the desired torque value. The microcomputer will generate a moderate current through the torque value conversion unit 82 to the electromagnetic coil 54 of the reluctance mechanism 50. It forms an eddy current on the brake core 53, and then generates a resistance to the flywheel 20 and acts on the magnetoresistive mechanism 50; because a beam load cell 70 is connected to the magnetoresistive mechanism 50 through an action rod 60 for measurement The control circuit unit 80 repeatedly captures the resistance to compare the desired torque value, and then further changes the delivered current, so that the load value reaches the desired torque value, because the beam load cell 70 is used in the present invention. The actual load sensing device, and the control circuit unit 80 will use the feedback signal to modify the current delivered by it, so that the accuracy of the load can be increased to more than 95%, so that the present invention truly meets the user's exercise benefit.

To sum up, the technical means disclosed in the present invention do have the requirements of invention patents such as "novelty", "progressiveness" and "available for industrial use". I hope that the Jun Bureau will grant patents to encourage invention without any responsibility. Sense of virtue.

However, the drawings and descriptions disclosed above are only preferred embodiments of the present invention. Anyone who is familiar with the art and makes modifications or equivalent changes based on the spirit of the case should still be included in the scope of the patent application in this case.

10: Support frame

11: Front plate body

12: Rear plate body

13: Shaft hole

14: positioning hole

15: Feet

16: slot

17: positioning rod

20: flywheel

21: Outer ring

22: inner wall

23: Wheel hub

24: Shaft hole

30: axis

33: bearing seat

34: Ball bearing

40: Pulley

50: Magnetoresistive mechanism

51: Coil movable frame

52: stator

53: Brake Core

54: Electromagnetic coil

55: penetration hole

60: Acting lever

61: Pressure Department

65: Screw

70: Beam load cell

71: Load element bracket

100: Magnetic control device that can directly measure the value of the motion load

Claims (3)

A magnetic control device that can directly measure the value of exercise load is applied to fitness exercise equipment. It includes: a support frame with a front and rear plate body, which is combined into one body by a plurality of positioning rods. The front, The upper end of the back plate is provided with a shaft hole, and the support frame is provided with a foot seat for fixing on the frame of the fitness exercise equipment; an axis is pivoted in the shaft hole for receiving the fitness equipment Transmission power; a flywheel, a disk body with a hub in the center and an outer ring on the outer periphery, and the hub has a shaft hole to sleeve on the shaft, and make the flywheel rotate by the shaft; A reluctance mechanism, including a coil movable frame, is pivoted on the periphery of the hub, and a stator is fixed on the outer edge of the coil movable frame. The ring is provided with a plurality of brake cores, and the brake core is provided with a container. The setting part is used to sleeve the electromagnetic coil and an input wire to connect the electromagnetic coil; an acting rod is fixed on the outer side of the magnetic resistance mechanism, and the end has a pressing part; a beam-type load The sensor is fixed on the support frame through a load cell bracket, and its outer end is fixedly connected to the pressing part; a control circuit unit is assembled on the side of the support frame in a built-in form, which at least includes A microcomputer control instrument, a torque value conversion unit, a power control unit, and a DC power supply connected to an AC power supply. The control circuit unit can input the desired torque value and is electrically connected to the input wire of the solenoid coil And the beam-type load cell; and the control circuit unit will calculate the desired torque value, generate a control signal and then form a moderate current, and synchronously input the electromagnetic coil of the magnetoresistive mechanism, then the electromagnetic The current of the coil will form an eddy current on the brake core, and then cause a resistance to the rotation of the flywheel, and the resistance will drive the reluctance mechanism to float and pivot, and the resistance will be applied to the beam by the lever Type load cell, the control circuit unit will repeatedly capture the resistance value to compare the desired torque value After that, the delivered current is further changed to make the actual load achieve the desired torque value. As described in item 1 of the scope of patent application, the magnetic control device that can directly measure the value of the motion load, which further includes at least one ball bearing, is installed between the coil movable frame and the hub of the flywheel, so that the coil The movable frame can float and pivot relative to the flywheel. As described in item 1 of the scope of patent application, the magnetic control device that can directly measure the value of exercise load, which further includes a pulley, is installed on the axis outside the support frame for sending fitness exercise equipment The input power is transmitted to the axis.

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