Torsion sensor device of resistance system

Abstract

The utility model discloses a torsion sensor device of a resistance system, which is characterized in that a torsion sensor is arranged on a support frame of the resistance system and on a straight line of a flywheel axis and a coil magnetic resistance mechanism, and a resistance strain gauge on the torsion sensor can generate different resistance value changes according to the deformation of a strain block. And the resistance value change is used as a magnetic force detection device, and the obtained magnetic force data is used for compensating and correcting the output current, so that the closed-loop system has the effects of improving the resistance control accuracy of the resistance system, enabling the resistance control to be more accurate and meeting the high-order equipment requirement. Furthermore, according to the utility model, the torsion sensor and the coil magnetic resistance mechanism for generating resistance (tension) are constructed in the same resistance system mechanism, so that the benefit of simplifying the whole structure is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to a kind of resistance system's torsion sensor device, especially a kind of resistance value change is used as the detection device of magnetic force, and the obtained magnetic force data is used as the torsion sensor device of compensation and correction output current. BACKGROUND

[0002] Resistance (tension) size control is applied in many places, such as resistance system of fitness equipment, resistance control of medical rehabilitation equipment, or even tension control on commercial or industrial equipment, with quite wide application.

[0003] As shown in Figure 1 , a widely used electromagnetic resistance system 10A is disclosed, which includes a flywheel 11 with its shaft 12 mounted on a support frame 13, and one or more coils 14 are provided on the side of the flywheel 11. When the coil 14 passes through the current to generate a magnetic field, and by the magnetic permeability of the flywheel 11 surface material, a magnetic circuit is formed between the coil core and the flywheel 11 when the coil 14 is energized, and when the flywheel 11 rotates, by Lenz's law, the flywheel 11 generates a rotating resistance which is opposite in direction and same in size.

[0004] As shown in Figure 2 , a widely used self-generating resistance system 10B is disclosed, which has the same structure as the electromagnetic resistance system 10A disclosed above, the difference is that the coil 14 of the electromagnetic resistance system 10A needs external power supply. The flywheel 11 of the self-generating resistance system 10B is provided with a power generation device 15, which can generate electricity by the rotation of the flywheel 11, and then provide the required power supply for the coil 14 to generate resistance.

[0005] The two resistance (tension) systems 10A, 10B disclosed above are mature products 2k7 prior art, so their principles and characteristics are not described in detail. This type of resistance (tension) system has been seen in: China publication CN201204540 "built-in eddy current magnetic resistance hybrid generator", Taiwan publication M420342 "self-generating resistance device for fitness equipment and rehabilitation equipment", U.S. Patent No. 6,084,325 "brake device with a combination of power-generating and eddy-current magnetic resistance", etc. The above resistance (tension) system relies on controlling the current size of the input coil 14 to control the size of the generated magnetic force (current X coil winding number = magnetic force), that is, the size of resistance or tension.

[0006] As Figure 3 shown, in the absence of measurement sensor as feedback, the control of magnetic force (i.e. resistance or tension) is difficult to meet the requirements of accurate control. The general control method is to measure the resistance curve of the device in advance at the beginning of the resistance system, which contains current, speed and power parameters and forms a power table. When we need to control the resistance, we can first explore the current required by the corresponding speed of the device required resistance (tension), and then control the current to control the resistance (tension) system 10A or 10B to generate the corresponding resistance (tension).

[0007] Therefore, we can see that it is an "open loop system", there is no feedback to compensate for the results, and the resistance system 10A or 10B, in the process of generating resistance, has many factors that affect the size of the magnetic force. For example, the length of the running time, the temperature of the flywheel, the temperature of the coil, the size of the gap between the flywheel and the iron core, etc. Because these factors will affect the size of the magnetic force line, the size of the magnetic resistance, the size of the coil wire resistance, etc. These will cause a large deviation between the final resistance and the required data.

[0008] To improve such deviation, one of the more effective ways is to change the above process into a "closed loop system" with a feedback device, and the feedback is the size of the magnetic force, which is a more effective method. This closed loop system can feedback the measured magnetic force to the control system at any time, and compare it with the set magnetic force size. If there is a deviation, the current size can be adjusted in time to meet the set requirements.

[0009] Therefore, it is urgent to design a torque sensor device of a resistance system to solve the above problems. Content of the utility model

[0010] The utility model discloses a torque sensor device of a resistance system, which has the advantages of improving the accuracy of resistance system in controlling resistance size, making resistance control more accurate, and meeting the requirements of high-level equipment.

[0011] The utility model also has the advantages of providing a torque sensor device of a resistance system, which has a precise resistance (tension) control method, and the torque sensor and the resistance (tension) generator are arranged in the same mechanism, so that the overall structure is simplified.

[0012] To achieve the above object, the utility model adopts technical means of a resistance system, it includes a support frame, has a left, right plate body, with a plurality of fixed position pole is combined into a whole, the left, right plate body is equipped with a shaft hole in the opposite position; a flywheel, it has a shaft, through left, right two bearings and bearing seat is pivoted on the shaft hole, so that the flywheel can rotate on the support frame; a coil magnetic resistance mechanism, it is equipped with a side edge of the flywheel outer periphery, is used to provide a magnetic force for the flywheel, and its magnetic force is proportional to the current applied; its characterized in that:

[0013] The bearing seat has a first ring body, the first ring body outer periphery is equipped with a positioning ring groove, and the inner side of the first ring body is equipped with a second ring body with a larger outer diameter; The shaft hole of the left, right plate body is equipped with an oval hole with a long slot, the first ring body of the bearing seat is placed from inside to outside on the shaft hole, the inner side is taken as the positioning surface of the second ring body, the outer side is taken with a positioning piece is placed on the ring groove, thereby the bearing seat is not connected rigidly on the shaft hole, but the bearing seat is in floating state on the shaft hole; A torque sensor, including a strain block, installed in the long slot of the shaft hole side, and needs with the shaft of the flywheel and the center of the coil magnetic resistance mechanism, on the same straight line, and the top end of the strain block extends inwards to form a transverse protruding plate, the top surface of the protruding plate is equipped to contact with the second ring body of the bearing seat, and the bottom edge surface of the opposite side of the protruding plate is equipped with a resistance strain gauge and its connecting wire, the resistance strain gauge will produce different resistance value changes according to the deformation amount of the strain block; And a control circuit, receiving the resistance value change of the torque sensor, then calculating the change of the resistance received, and comparing the difference between the required resistance and the actual resistance to adjust the size of the force, so that the required resistance and the actual resistance are consistent.

[0014] Further, when the first ring body of the bearing seat is placed in the shaft hole, an active gap is formed between the shaft hole and the long slot, which can displace the bearing seat to the strain block.

[0015] Further, the protruding plate at the top end of the strain block has a free end without fixing object, so that it has elastic deformation.

[0016] Further, the positioning piece includes a clamp spring or a positioning ring, which is placed on the ring groove, so that the bearing seat is positioned on the shaft hole.

[0017] Further, one side end of the shaft of the flywheel is locked by a first nut and a first screw, and the other side end is placed with a belt pulley and locked by a second nut and a second screw. According to the above characteristics, the torque sensor is locked on the left, right plate body by a third screw.

[0018] With the above technical means, the utility model has the following effects:

[0019] The present invention utilizes a torque sensor positioned in a straight line between the flywheel axis and the coil magnetic resistance mechanism, using resistance value changes as a magnetic force detection device, and uses the resulting magnetic force data to compensate and correct the output current, thereby improving the resistance system's accuracy in controlling resistance, making resistance control more precise and meeting the requirements of high-end equipment.

[0020] The present invention integrates the torque sensor and the coil magnetic resistance mechanism that generates resistance (tension) into the same resistance system, which has the benefit of simplifying the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of an electromagnetic resistance system;

[0022] Figure 2 A schematic diagram of a self-generating resistance system;

[0023] Figure 3 It is a schematic diagram of the resistance control process of an open-loop system;

[0024] Figure 4 This is an exploded perspective view of the utility model;

[0025] Figure 5 This is an enlarged schematic diagram of the right plate of the support frame of the present invention;

[0026] Figure 6 This is a three-dimensional diagram of the torque sensor of the present utility model;

[0027] Figure 7 This is a three-dimensional view of the torque sensor of the present invention from another angle;

[0028] Figure 8 It is a right side combined stereogram of the present utility model;

[0029] Figure 9 It is a left-side combined stereogram of the present utility model;

[0030] Figure 10 This is an exploded perspective view of the bearing seat and torque sensor of the present invention;

[0031] Figure 11 This is a combined three-dimensional diagram of the bearing seat and torque sensor of the present invention;

[0032] Figure 12 It is a side view of the utility model;

[0033] Figure 13 yes Figure 12 An enlarged cross-sectional view of some structures in FIG.

[0034] Figure 14 Resistance control flow diagram of the closed loop system of the utility model;

[0035] Figure 15 Reference schematic diagram of the utility model in use state Figure 1 ;

[0036] Figure 16 Reference schematic diagram of the utility model in use state Figure 4 .

[0037] Marking in the figure:

[0038] 20 support frame;

[0039] 20L left plate body;

[0040] 20R right plate body;

[0041] 21 shaft hole;

[0042] 24 positioning rod;

[0043] 30 flywheel;

[0044] 31 shaft center;

[0045] 32 bearing;

[0046] 33 first nut;

[0047] 34 first screw;

[0048] 35 belt pulley;

[0049] 36 second nut;

[0050] 37 second screw;

[0051] 40 coil magnetic resistance mechanism;

[0052] 41 iron core;

[0053] 42 coil;

[0054] 50 bearing seat;

[0055] 60 torsion sensor;

[0056] 65 third screw;

[0057] 70 resistance system. DETAILED DESCRIPTION

[0058] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0059] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0060] Refer to the following Figures 4 to 14 The present invention describes a torque sensor device for a resistance system. Basically, the resistance system proposed in the present invention, whether an "electromagnetic system" or a "self-generated system," differs in how the current is obtained: one uses an external power source, and the other uses self-generated power. However, the structure of the magnetic feedback strain gauge is essentially the same. Therefore, the following embodiments only illustrate the structure of the electromagnetic resistance system.

[0061] The resistance system 70 of the present invention includes: a support frame 20 having left and right plates 20L and 20R, which are assembled into one body by a plurality of positioning rods 24. The left and right plates 20L and 20R are provided with an axial hole 21 at relative positions; a flywheel 30 having an axis 31, which is pivotally mounted on the axis hole 21 via left and right bearings 32 and a bearing seat 50, so that the flywheel 30 can rotate on the support frame 20. In this embodiment, one end of the axis 31 of the flywheel 30 is locked in place by a first nut 33 and a first screw 34, and the other end is provided with a pulley 35 and locked in place by a second nut 36 and a second screw 37. A coil reluctance mechanism 40 is disposed on one side of the outer periphery of the flywheel 30 to provide a magnetic force proportional to the applied current. In this embodiment, the coil reluctance mechanism 40 comprises an iron core 41 and a coil 42 wound thereon. This structure is prior art and is not the subject of this utility model, so a detailed description thereof will not be given.

[0062] The main features of the present invention are as follows: the bearing seat 50 has a first ring body 51, a positioning ring groove 511 is provided on the outer periphery of the first ring body 51, and a second ring body 52 with a larger outer diameter is provided on the inner side surface of the first ring body 51; in this embodiment, the outer diameter of the second ring body 52 needs to be larger than the shaft hole 21.

[0063] The shaft hole 21 of the left and right plate bodies 20L, 20R is an oval hole with a long slot 23, and the first ring body 51 of the bearing seat 50 is placed on the shaft hole 21 from inside to outside. The inside is positioned by the second ring body 52, and the outside is placed on the ring groove 511 by a positioning member 53, so that the bearing seat 50 is not rigidly connected to the shaft hole 21, but is in a floating state on the shaft hole 21. In this embodiment, the positioning member 53 includes a snap spring or a positioning ring, which is placed on the ring groove 511 to position the bearing seat 50 on the shaft hole 21.

[0064] As shown in Figure 5 , which shows an enlarged schematic view of the right plate body 20R of the support frame 20. In a preferred embodiment, when the first ring body 51 of the bearing seat 50 is placed on the shaft hole 21, an active gap 22 is formed between the shaft hole 21 and the long slot 23, which allows the bearing seat 50 to move in the direction of the strain block 61. The dashed line indicates a circle, which is the position of the first ring body 51. However, the shaft hole 21 of the utility model is not a circle, but is in the shape of B, with an active gap 22, which allows the bearing seat 50 to move when the acting pressure (P) changes, and can adjust the movement in real time when the acting pressure (P) changes, as shown in Figure 12 and Figure 13 .

[0065] A torsion sensor 60, as shown in Figure 6 and Figure 7 , includes a strain block 61 installed in the long slot 23 on the side of the shaft hole 21, and needs to be in the same straight line (X-X axis) as the shaft center 31 of the flywheel 30 and the center of the coil reluctance mechanism 40, as shown in Figure 12 and Figure 13 , and the top end of the strain block 61 extends inward to form a transverse protruding plate 62, the top surface 621 of the protruding plate is arranged to contact the second ring body 52 of the bearing seat 50, and the bottom edge surface 622 of the opposite side of the protruding plate 62 is provided with a resistance strain gauge 63 and a connecting wire 64, the resistance strain gauge 63 will produce different resistance value changes according to the deformation amount of the strain block 61.

[0066] In this embodiment, the torsion sensor 60 is locked on the left and right plate bodies 20L, 20R by a third screw 65. As shown in Figure 10 and Figure 11 , the protruding plate 62 at the top end of the strain block 61 has a free end without a fixed object, so that it has elastic deformation. The protruding plate 62 is in a hollow state and contacts and abuts against the outer periphery of the second ring body 52, and bears the acting pressure (P).

[0067] In this embodiment, the greater the current of the coil reluctance mechanism 40, the stronger the magnetic force, and the smaller the current, the weaker the magnetic force. The magnetic force generated by the coil reluctance mechanism 40 forms a magnetic circuit with the flywheel 30 with a magnetic conductive material, thereby attracting the flywheel 30. When the flywheel 30 is subjected to the magnetic force, since the flywheel 30 is floating and fixed on the support frame 20, it will approach the coil reluctance mechanism 40, and the strain block 61 will bear pressure and be deformed, thereby causing the resistance change of the resistance strain gauge 63. The greater the magnetic force received by the flywheel 30, the greater the deformation of the strain block 61. Conversely, the smaller the magnetic force received by the flywheel 30, the smaller the pressure on the strain block 61, and the smaller the deformation.

[0068] A control circuit 80 receives the resistance value change of the torque sensor 60, and calculates the change of the resistance received, and compares the difference between the required resistance and the actual resistance to adjust the size of the force, so as to make the required resistance consistent with the actual resistance.

[0069] As shown in the resistance control flowchart of the closed-loop system of the utility model, the steps include: Figure 14 S1: input the required resistance (tension);

[0070] S2: compare the required resistance with the actual resistance;

[0071] S3: calculate the required current, so that the control circuit 80 adjusts the required current 82 according to the resistance value change 81, so that the coil reluctance mechanism 40 changes the magnetic force;

[0072] S4: generate the corresponding resistance;

[0073] S5: measure the actual resistance, and then return to S2: compare the required resistance with the actual resistance;

[0074] According to the above-mentioned closed-loop system, feedback is used to compensate to correct the result. To form such a closed-loop system, the technical means of the utility model is to use the torque sensor 60 to use the resistance value change as a magnetic force detection device, and use the obtained magnetic force data as compensation and correction of the output current. In this way, the above-mentioned many factors affecting the resistance (tension) can be reduced to the minimum.

[0075]

[0076] Figure 15 ​is a use state reference schematic diagram of the utility model, which shows the application of the resistance system 70 on the fitness and rehabilitation equipment 90; the belt pulley 35 can be connected with the fitness and rehabilitation equipment 90, and the control circuit 80 can be arranged in the instrument panel. In the fitness equipment and the medical rehabilitation equipment, due to the high-level fitness equipment, especially the training fitness equipment for professional training, the accuracy of training data has strict requirements. Training personnel need to set and execute fine training plans and obtain accurate training result feedback as the basis for achievement verification and retraining plan making, so accurate data acquisition and execution are very important. The resistance system 70 of the closed-loop system of the utility model combined with the control circuit 80 can effectively make the resistance control more accurate and achieve the effect of high-level equipment requirements.

[0077] Figure 16 is another use state reference schematic diagram of the utility model, which shows the application of the resistance system 70 on a tension device 100; the belt pulley 35 can be connected with the tension device 100, and the control circuit 80 can be arranged around the tension device 100. For the equipment that needs to strictly control the tension, the resistance system 70 of the closed-loop system of the utility model combined with the control circuit 80 has a resistance value change 81 feedback device and can adjust the output current 82 to form a closed-loop control brake system, which can better achieve the required control requirements, and the embodiment can well achieve the required functional characteristics in such requirements.

[0078] The utility model discloses the technical means, and it has the following effect improvement:

[0079] , the utility model uses the torque sensor 60 arranged in the straight line between the flywheel shaft 31 and the coil magnetic resistance mechanism 40, uses resistance value change as a magnetic force detection device, and uses the obtained magnetic force data as compensation and correction output current, has the effect of improving the accuracy of resistance system 70 control resistance, makes resistance control more accurate, and achieves the effect of high-level equipment requirements.

[0080] Secondly, the utility model arranges the torque sensor 60 and the coil magnetic resistance mechanism 40 generating resistance (tension) in the same mechanism of resistance system 70, has the benefit of simplifying the overall structure.

[0081] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A torque sensor device for a resistance system, characterized by Including, A support frame has a left and right plate body combined into one by a plurality of positioning rods, and an axle hole is arranged at opposite positions on the left and right plate bodies; A flywheel has an axle and is pivotally arranged on the axle hole through two bearings and a bearing seat, so that the flywheel can rotate on the support frame; A coil magnetic resistance mechanism is arranged on one side of the outer periphery of the flywheel to provide a magnetic force to the flywheel, and the magnetic force is proportional to the applied current; Characterized in that: The bearing seat has a first ring body, and a positioning ring groove is arranged on the outer periphery of the first ring body, and a second ring body with a larger outer diameter is arranged on the inner side of the first ring body; The axle hole of the left and right plate bodies is an oval hole with a long slot and is not a true circle, and the first ring body of the bearing seat is arranged on the axle hole from the inside to the outside, the inner side is positioned by the second ring body, and the outer side is positioned by a positioning member arranged in the ring groove, so that the bearing seat is not rigidly connected to the axle hole, but is arranged in a floating state on the axle hole; A torsion sensor includes a strain block installed in the long slot on the side of the axle hole, and needs to be on the same straight line with the axle of the flywheel and the center of the coil magnetic resistance mechanism, and the top end of the strain block extends inward to form a transverse protruding plate, the top surface of the protruding plate is arranged to contact the second ring body of the bearing seat, and the bottom edge surface of the opposite side of the protruding plate is provided with a resistance strain gauge and its connecting wire, and the resistance strain gauge generates different resistance value changes according to the deformation amount of the strain block; and A control circuit receives the resistance value changes of the torsion sensor, calculates the changes of the resistance received, compares the difference between the required resistance and the actual resistance, and adjusts the size of the applied force to make the required resistance consistent with the actual resistance.

2. The torsion sensor device of a resistance system according to claim 1, characterized in that, When the first ring body of the bearing seat is arranged on the axle hole, an active gap is formed between the axle hole and the long slot for the displacement of the bearing seat to the strain block.

3. The torsion sensor device of a resistance system according to claim 2, characterized in that, The protruding plate at the top end of the strain block has a free end without fixation, so that it has elastic deformation.

4. The torsion sensor device of the resistance system of claim 1, wherein, The positioning member includes a clamp spring or a positioning ring arranged on the ring groove to position the bearing seat on the axle hole.

5. The torsion sensor device of the resistance system of claim 1, wherein, One side end of the axle of the flywheel is locked by a first nut and a first screw, and the other side end is sleeved with a belt pulley and locked by a second nut and a second screw.

6. The torsion sensor device of the resistance system of claim 1, wherein, The torsion sensor is locked on the left and right plate bodies by a third screw.

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