Exercise device and its pulling motor

Abstract

The application relates to a fitness equipment and a tension motor thereof, the tension motor of the fitness equipment comprising a stator, a rotor, a capacitor and a two-phase stator winding; the rotor is a hollow rotor of ferromagnetic material; the two-phase stator winding comprises a stator first winding and a stator second winding connected in series, and the stator first winding and the stator second winding are symmetrically arranged; the capacitor comprises a main operation capacitor group, and the main operation capacitor group is arranged in parallel at two ends of the stator first winding. The tension motor of the above-mentioned fitness equipment changes the original asymmetric winding into a symmetric winding and changes the original cast aluminum silicon steel sheet rotor into a hollow rotor of ferromagnetic material, which on one hand optimizes and improves the product performance under the premise of guaranteeing simple product structure; on the other hand, compared with traditional confrontation strength fitness equipment, the tension motor has the advantages of relative easy preparation, easy adjustment, simple use and low failure rate.

Description

Technical Field

[0001] This application relates to the field of tension motors for fitness equipment, and in particular to fitness equipment and its tension motors. Background Technology

[0002] In the fitness field, resistance training exercises are quite common. Traditional resistance training equipment mainly uses weights, servo motors, cylinders, springs, etc., to generate resistance force for users.

[0003] Traditional resistance training equipment has its own drawbacks and limitations. For example, weight machines require manual replacement of each weight to adjust the pulling force. Cylinder machines are limited to gym use and require dedicated personnel, making them unsuitable for home use. Spring machines are difficult to adjust. Servo motor machines have complex electronic control systems, are difficult to manufacture, and prone to malfunctions, making them unsuitable for home use.

[0004] The applicant's Chinese patent, publication number CN105337555A, discloses a single-phase large capacitor-run motor, which includes a main winding, an auxiliary winding, and a first running capacitor. The main winding and auxiliary winding are connected in series, and the first running capacitor is connected in parallel across the two ends of the main winding. The main winding and auxiliary winding are respectively used to connect to the two ends of a power supply. The capacitance C of the first running capacitor is determined by the following formula: C = C1 * a, where a is a constant and its value ranges from 3 to 7, and C1 is the capacitance of the second running capacitor of the single-phase capacitor-run motor. This single-phase large capacitor-run motor, through the series connection of the main and auxiliary windings and the parallel connection of the running capacitor across the two ends of the main winding, with the capacitance of the running capacitor determined by the above formula, increases the capacitance of the running capacitor. This running capacitor also acts as a starting capacitor, thus ensuring a large starting torque for the single-phase large capacitor-run motor while maintaining a simple structure and low cost.

[0005] However, the aforementioned single-phase large capacitor-operated motor still needs further improvement. Summary of the Invention

[0006] Therefore, it is necessary to provide a fitness device and its tension motor.

[0007] In one embodiment, a tension motor for a fitness device includes a stator, a rotor, a capacitor, and a two-phase stator winding.

[0008] The rotor is a hollow rotor made of ferromagnetic material;

[0009] The two-phase stator winding includes a first stator winding and a second stator winding connected in series, and the first stator winding and the second stator winding are symmetrically arranged.

[0010] The capacitor comprises a main operating capacitor group, which is arranged in parallel at both ends of the first stator winding.

[0011] The tension motor of the fitness equipment changes the original asymmetric winding into a symmetric winding and changes the original cast aluminum silicon steel sheet rotor into a ferromagnetic material hollow rotor, which optimizes the product performance on the premise of simple structure and has the advantages of easy preparation, easy adjustment, simple use and low failure rate compared with traditional confrontation fitness equipment.

[0012] In one embodiment, the capacitance of the main operating capacitor group is positively correlated with the tension output by the tension motor of the fitness equipment.

[0013] In one embodiment, the tension output by the tension motor in forward and reverse rotation has a variation range of 44% to 60%.

[0014] In one embodiment, the capacitor further comprises a secondary operating capacitor group, which is arranged in parallel at both ends of the second stator winding.

[0015] In one embodiment, the capacitance of the main operating capacitor group is greater than that of the secondary operating capacitor group.

[0016] In one embodiment, the capacitance of the secondary operating capacitor group is negatively correlated with the tension output by the tension motor of the fitness equipment.

[0017] In one embodiment, the first stator winding and the second stator winding have a first connection site, the main operating capacitor group and the secondary operating capacitor group have a second connection site, and the first connection site is connected to the second connection site.

[0018] In one embodiment, the tension output by the tension motor in forward and reverse rotation has a variation range of 10.8% to 16%.

[0019] In one embodiment, the tension size is changed by adjusting the voltage of the tension motor of the fitness equipment through the capacitor.

[0020] In one embodiment, a fitness equipment comprises the tension motor of the fitness equipment of any one of the embodiments and a strength fitness equipment connected to the tension motor of the fitness equipment, and the tension motor of the fitness equipment is used to generate a confrontation strength for the strength fitness equipment. BRIEF DESCRIPTION OF DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the external appearance of an embodiment of the tension motor of the fitness equipment described in this application.

[0023] Figure 2 for Figure 1 A schematic diagram of the internal structure of the embodiment shown.

[0024] Figure 3 for Figure 1 A schematic cross-sectional view along the AA direction of the embodiment shown.

[0025] Figure 4 for Figure 3 The illustrated embodiment shows a structural diagram of the casing removed.

[0026] Figure 5 for Figure 4 A partial structural schematic diagram of the embodiment shown.

[0027] Figure 6 This is a schematic diagram of the stator and its two stator windings of another embodiment of the tension motor of the fitness equipment described in this application.

[0028] Figure 7 This is a partial structural schematic diagram of another embodiment of the tension motor of the fitness equipment described in this application.

[0029] Figure 8 This is a circuit diagram of another embodiment of the tension motor of the fitness equipment described in this application.

[0030] Figure 9 for Figure 8 A schematic diagram of the power supply connection in the embodiment shown.

[0031] Figure 10 This is a circuit diagram of another embodiment of the tension motor of the fitness equipment described in this application.

[0032] Figure 11 for Figure 10 A schematic diagram of the power supply connection in the embodiment shown.

[0033] Figure label:

[0034] Two-phase stator winding 100, stator 200, rotor 300, shaft core 400, rotor support 500, housing 600, single-phase power supply 700, tension motor 900;

[0035] Stator first winding 110, first winding end 111, stator second winding 120, second winding end 122, first connection site 130, hollow area 310, first end cover 610, second end cover 620, take-up wheel 630, mounting hole 640, first connection end 710, second connection end 720, main operating capacitor group 810, auxiliary operating capacitor group 820, second connection site 830. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners, which are different from those described herein, and it can be apparent to those skilled in the art that similar modifications of the present application can be made without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0037] It should be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on the other element or intervening elements can also be present. In addition, the term "connected" can refer to physical or logical coupling, and can include wired and / or wireless connections. As used herein, the terms "vertical", "horizontal", "up", "down", "left", "right", and the like, are merely used for the purpose of explanation and are not intended to be limiting.

[0038] In addition, the terms "first", "second", etc., are used herein only to describe various elements, and are not intended to imply relative importance or a number of indicated technical features. Thus, features defined with "first", "second", etc., can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "above", "over" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The "below", "under" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0040] Unless otherwise defined, all technical and scientific terms used in the application's specification are intended to have the same meaning as commonly understood by one of ordinary skill in the art to which the application pertains. The terminology used in the application's specification is for describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0041] The application discloses a fitness equipment and a tension motor thereof, which comprises part or all of the following embodiments; that is, the fitness equipment and the tension motor thereof comprise part or all of the following technical features. In one embodiment of the application, a tension motor of a fitness equipment comprises a stator, a rotor, a capacitor and a two-phase stator winding; the rotor is a hollow rotor of ferromagnetic material; the two-phase stator winding comprises a stator first winding and a stator second winding connected in series, and the stator first winding and the stator second winding are symmetrically arranged; the capacitor comprises a main operating capacitor group, and the main operating capacitor group is arranged in parallel at both ends of the stator first winding. The tension motor of the fitness equipment changes the original asymmetric winding into a symmetric winding and changes the original cast aluminum silicon steel sheet rotor into a hollow rotor of ferromagnetic material, which, on the one hand, optimizes and improves the product performance on the premise of ensuring the simple product structure; on the other hand, compared with the traditional confrontation strength fitness equipment, the tension motor has the advantages of being relatively easy to manufacture, easy to adjust, simple to use and low in failure rate.

[0042] In one embodiment, a tension motor 900 of a fitness equipment as shown in Figure 1 and Figure 2 comprises a stator 200 and a rotor 300, the stator 200 is kept stationary relative to the rotor 300, and the rotor 300 has a rotating state relative to the stator 200. In each embodiment, the tension motor 900 of the fitness equipment can also be referred to as a tension motor, which is applied in the fitness field, that is, the tension motor 900 of the fitness equipment in each embodiment is used in a strength fitness equipment in the fitness field, and such a strength fitness equipment can also be referred to as a fitness equipment, which has special requirements for the working performance of the tension motor. The fitness equipment only has practicality when the special requirements are met, and the special requirements are described in detail in the following embodiments.

[0043] To meet the needs of normal use of motor products, further, in the embodiment, the bodybuilding equipment's tension motor 900 further comprises a casing 600, and the stator 200 and the rotor 300 are arranged inside the casing 600. Further, the bodybuilding equipment's tension motor 900 is respectively provided with a first end cover 610 and a second end cover 620 at two ends of the casing 600, and the first end cover 610 and the second end cover 620 are respectively detachably mounted at one end of the casing 600, for mounting at two ends of the casing 600, on one hand, can support other structures such as shaft core and take-up wheel, etc., on the other hand, can optionally cooperate with the cooling scheme to open or close the casing 600. The casing 600 can be cylindrical or prismatic, or can be a variant of cylindrical or prismatic, as long as safety and practicability are met.

[0044] In combination Figure 3 Further, in one of the embodiments, the bodybuilding equipment's tension motor 900 further comprises a shaft core 400 and a rotor support 500; the rotor support 500 is fixedly arranged on the shaft core 400, and the rotor 300 is fixed on the rotor support 500. For the embodiment with the casing 600, the shaft core 400 is rotationally arranged in the casing 600, the stator 200 is fixedly arranged in the casing 600, and the rotor 300 and the rotor support 500 are located in the casing 600. In the embodiment, the casing 600 is provided with mounting holes 640 for mounting the first end cover 610 and the second end cover 620, so as to facilitate mounting of various structures inside the casing 600, and also facilitate maintenance of the bodybuilding equipment's tension motor 900.

[0045] Further, in the embodiment, the bodybuilding equipment's tension motor 900 further comprises a take-up wheel 630 fixed at one end of the shaft core 400, and a tension line (not shown in the figure) arranged on the take-up wheel 630 in a retractable manner, and the shaft core 400 controls the take-up wheel 630 to form a recovered tension line state and a released tension line state for the tension line through rotation and rotation direction, so that the bodybuilding equipment's tension motor 900 can be applied to a bodybuilding equipment as a tension for generating counterforce. In addition to the take-up wheel and the tension line, a transmission gear and a gear belt, or similar structures can also be used for replacement, as long as they can output the tension provided by the bodybuilding equipment's tension motor 900 through power conversion.

[0046] In one of the embodiments, as Figure 3 and Figure 4As shown, the pulling motor 900 of the fitness equipment further comprises a two-phase stator winding 100, which is arranged on the stator 200 and serves to drive the rotor 300 to rotate by electric current. The two-phase stator winding is also called two-phase stator winding or 2-phase stator winding. The stator is a main structural component of the motor, mainly comprising a core and a winding wire arranged on the core. The winding wire is usually copper wire. In the embodiment, two windings can be arranged on the stator, and other winding methods can also be used in other embodiments. Figure 5 In the embodiment, the rotor 300 is a hollow rotor made of ferromagnetic material, which has a hollow area 310. Further, in one embodiment, the rotor 300 is a hollow rotor made of pure electrical iron. Pure electrical iron, also known as industrial pure iron, has an iron content of more than 99.5%, for example, specifications such as DT4A, DT4E, DT4C, DT3A or DT8 can be selected. Further, the rotor 300 of the pulling motor 900 of the fitness equipment in the embodiment is a hollow rotor made of pure electrical iron. The thickness of the rotor 300 is 4.5-8mm, and the two ends are connected to the shaft core 400 by end plates. It should be noted that the rotor 300 of the pulling motor 900 of the fitness equipment in each embodiment of the present application can only be made of ferromagnetic material, otherwise the technical functions designed for the pulling motor cannot be achieved. Specifically, to achieve the unique technical functions of the pulling motor, i.e. to meet the special requirements, the stator must be a two-phase multi-pole symmetrical winding with double sets of operating capacitors or single sets of operating capacitors; and the rotor 300 must be a hollow rotor made of ferromagnetic material, and the two cannot be used separately. The combination of technical solutions cannot achieve the purpose of design. This is the result of numerous tests and experiments. The pulling motor alternately changes in the running process, and the hollow structure of the rotor 300 is beneficial to reduce the interference of inertial force. Such a structure design has the advantages of relative ease of preparation, easy adjustment, simple use and low failure rate compared with traditional resistance fitness equipment.

[0047] Further, Figure 3 and Figure 4 In the embodiment, the stator 200 is a 24-slot stator, i.e. the stator core has 24 slots, and each phase occupies 12 slots. In one embodiment, as shown in Figure 6As shown, the stator 200 is a 48-slot stator, i.e., the stator core has 48 slots, and each phase occupies 24 slots. In this embodiment, the dual-phase stator winding 100 includes the stator first winding 110 and the stator second winding 120 connected in series, and the conventional 6-pole motor winding is a 2-phase 6-pole winding structure. The stator first winding 110 and the stator second winding 120 are symmetrically arranged. Specifically, the tension motor 900 of the fitness equipment according to the embodiments of the present application is a single-phase motor, but the difference is that the motor winding adopts a 2-phase symmetric winding, and each phase is connected in parallel with a running capacitor group. In one embodiment, the dual-phase stator winding 100 used by the stator 200 is a 2-phase 6-pole symmetric winding. Such a design changes the original asymmetric winding to a symmetric winding, and changes the original cast aluminum silicon steel sheet rotor to a ferromagnetic material hollow rotor, which optimizes the product performance under the premise of ensuring the simple structure of the product.

[0048] In one embodiment, as shown in Figure 7 The stator 200 is a 36-slot stator, i.e., the stator core has 36 slots, and each phase occupies 18 slots. Further, the number of slots of the stator 200 is set according to the quietness. More slots will lead to complex winding, but it is beneficial to form finer winding positions, thereby improving the quietness to a certain extent.

[0049] In one embodiment, as shown in Figure 8 The tension motor 900 of the fitness equipment further includes a capacitor and a dual-phase stator winding 100. In one embodiment, the voltage of the tension motor 900 of the fitness equipment is adjusted by the capacitor to change the tension. In this embodiment, the dual-phase stator winding 100 includes the stator first winding 110 and the stator second winding 120 connected in series, and the stator first winding 110 and the stator second winding 120 are symmetrically arranged. The capacitor includes a main running capacitor group 810, and the main running capacitor group 810 is connected in parallel at both ends of the stator first winding 110. In one embodiment, the capacitance of the main running capacitor group 810 is positively correlated with the tension output by the tension motor 900 of the fitness equipment. For the embodiment in which only the main running capacitor group 810 is provided and no auxiliary running capacitor group is provided, the tension output by the tension motor in forward rotation and reverse rotation has a variation amplitude of 44% to 60%.

[0050] In combination with Figure 9Further, in the embodiment, the first winding end 111 of the stator first winding 110, which is away from the stator second winding 120, is used to connect the first connecting end 710 of the single-phase power supply 700, and the second winding end 122 of the stator second winding 120, which is away from the stator first winding 110, is used to connect the second connecting end 720 of the single-phase power supply 700. Further, in one of the embodiments, the tension motor 900 of the fitness equipment further comprises a voltage adjustment controller, which is arranged between the first connecting end 710 of the single-phase power supply 700 and the first winding end 111 of the stator first winding 110, and is used to adjust the output voltage of the single-phase power supply 700 in a linear adjustment manner or a step-by-step adjustment manner, so as to adjust the tension output by the tension motor 900 of the fitness equipment in cooperation with the capacitor, for example, the main operating capacitor group 810.

[0051] In one of the embodiments, as shown in Figure 10 the capacitor further comprises a secondary operating capacitor group 820, which is arranged in parallel at both ends of the stator second winding 120. In one of the embodiments, the capacitance of the main operating capacitor group 810 is greater than the capacitance of the secondary operating capacitor group 820. In one of the embodiments, the capacitance of the secondary operating capacitor group 820 is negatively related to the tension output by the tension motor 900 of the fitness equipment. In one of the embodiments, the capacitance of the main operating capacitor group 810 is positively related to the tension output by the tension motor 900 of the fitness equipment, and the capacitance of the secondary operating capacitor group 820 is negatively related to the tension output by the tension motor 900 of the fitness equipment. The remaining embodiments are similar and will not be described in detail.

[0052] In combination with Figure 11 In the embodiment, the first connecting position 130 is arranged between the stator first winding 110 and the stator second winding 120, and the second connecting position 830 is arranged between the main operating capacitor group 810 and the secondary operating capacitor group 820, and the first connecting position 130 is connected to the second connecting position 830. For the embodiments in which the main operating capacitor group 810 and the secondary operating capacitor group 820 are arranged at the same time, the change range of the tension output by the forward rotation and reverse rotation of the tension motor is 10.8% to 16%.

[0053] For the fitness equipment tensile motor 900, it is mainly applied to fitness equipment. In one embodiment, a fitness equipment includes the fitness equipment tensile motor 900 of any embodiment and the strength fitness equipment connected with the fitness equipment tensile motor 900, and the fitness equipment tensile motor 900 is used to generate the opposing force for the strength fitness equipment. In one embodiment, the fitness equipment includes the fitness equipment tensile motor 900 and the strength fitness equipment connected with the fitness equipment tensile motor 900, and the fitness equipment tensile motor 900 includes the stator 200, the rotor 300, the capacitor and the dual-phase stator winding 100; the rotor 300 is a hollow rotor of ferromagnetic material; the dual-phase stator winding 100 includes the stator first winding 110 and the stator second winding 120 connected in series, and the stator first winding 110 and the stator second winding 120 are symmetrically arranged; the capacitor includes the main operation capacitor group 810, and the main operation capacitor group 810 is arranged in parallel at both ends of the stator first winding 110; the fitness equipment tensile motor 900 is used to generate the opposing force for the strength fitness equipment. Alternatively, the fitness equipment includes the fitness equipment tensile motor 900 and the strength fitness equipment connected with the fitness equipment tensile motor 900, and the fitness equipment tensile motor 900 includes the stator 200, the rotor 300, the main operation capacitor group 810 and the dual-phase stator winding 100; the rotor 300 is a hollow rotor of ferromagnetic material; the dual-phase stator winding 100 includes the stator first winding 110 and the stator second winding 120 connected in series, and the stator first winding 110 and the stator second winding 120 are symmetrically arranged; the first winding end 111 of the stator first winding 110 away from the stator second winding 120 is used to connect the first connection end 710 of the single-phase power supply 700, and the second winding end 122 of the stator second winding 120 away from the stator first winding 110 is used to connect the second connection end 720 of the single-phase power supply 700; the main operation capacitor group 810 is arranged in parallel at both ends of the stator first winding 110; the fitness equipment tensile motor 900 is used to generate the opposing force for the strength fitness equipment. The remaining embodiments are similar, and details are not repeated.

[0054] Further, in one embodiment, the fitness equipment tensile motor 900 is connected with the strength fitness equipment in the tensile line mode, and the output tensile force is adjusted by the electric control mode such as the voltage adjustment mode to generate the opposing force. Such design has the following advantages: on the one hand, it has good opposing tensile force output, and it is easy to realize uniform tensile force whether the wire is reeled or unreeled; on the other hand, it can further cooperate with the electric control structure to realize multi-stage speed change, for example, the tensile force can be arbitrarily changed by the voltage adjustment of the tensile motor; and on the other hand, the tensile motor generates the tensile force by electricity, so it is easy to control, and can further cooperate with the intelligent device such as the mobile terminal to realize intelligent control.

[0055] As mentioned above, the special requirements of the fitness equipment on the working performance of the pulling motor include the following two points.

[0056] First, the pulling motor must have three kinds of pulling force alternating states. The first kind of pulling force alternating state is that when the external pulling force such as manpower or material force is less than the pulling force of the pulling motor, the motor rotor runs along the direction of its own rotating magnetic field to generate active pulling force to the outside world. The second kind of pulling force alternating state is that when the external pulling force is equal to the pulling force of the pulling motor, the motor rotor remains in a static state to generate static pulling force to the outside world. The third kind of pulling force alternating state is that when the external pulling force is greater than the pulling force of the pulling motor, the motor rotor runs against the direction of its own rotating magnetic field to generate passive pulling force to the outside world. The pulling motor must be able to work in the above-mentioned three kinds of pulling force alternating states for a long time. Further, in each embodiment, the pulling motor 900 of the fitness equipment described in the present application has the above-mentioned three kinds of pulling force alternating states.

[0057] Second, when the pulling force alternates in the above-mentioned three states, the electric power input by the pulling motor cannot change greatly with the change of the pulling force state, otherwise the uniformity of the pulling force cannot be guaranteed, and if the pulling force is obviously different when winding or unwinding, it will affect the training of the resistance. Among them, in the first kind of pulling force alternating state, the fitness equipment is in the state of recovering the pulling force line, that is, winding, and in the third kind of pulling force alternating state, the fitness equipment is in the state of releasing the pulling force line, that is, unwinding. Further, in each embodiment, the pulling motor 900 of the fitness equipment described in the present application changes the electric power input by the pulling motor by no more than 60% when the pulling force alternates in the above-mentioned three states, and by no more than 16% for the embodiment with a secondary operating capacitor group 820, thus meeting the high and low standard requirements of the resistance training, and being very practical in the specific field of fitness equipment.

[0058] Obviously, the pulling motor involved in the present application is a special motor, and the conventional motor cannot meet the above-mentioned two special requirements, while the pulling motor 900 of the fitness equipment described in each embodiment of the present application can fully meet the above-mentioned two special requirements, and thus is very practical in the specific field of fitness equipment.

[0059] The following will be combined with Figures 1 to 11 to further illustrate the pulling motor 900 of the fitness equipment.

[0060] Embodiment 1: A pulling force motor 900 for fitness field, comprising a stator 200 and a rotor 300, the stator 200 adopts 2-phase multi-pole symmetrical winding, the pole number is 2-phase 6-pole symmetrical winding, a series circuit is formed by a stator first winding 110 and a stator second winding 120 of the stator 200, and is connected at both ends of a single-phase power supply 700. In this embodiment, the pulling force motor 900 for fitness field further comprises a double-group operating capacitor; the stator 200 adopts 2-phase multi-pole symmetrical winding, that is, the double-phase stator winding 100, the 2-phase multi-pole symmetrical winding is the stator first winding 110 and the stator second winding 120 respectively, the double-group operating capacitor comprises a main operating capacitor group 810 and a sub operating capacitor group 820; for the circuit structure, the stator first winding 110 and the stator second winding 120 form a series circuit, which is connected at both ends of the single-phase power supply 700, the main operating capacitor group 810 is connected in parallel at both ends of the stator first winding 110 through a first winding end 111, a first connection site 130 and a second connection site 830, and the sub operating capacitor group 820 is connected in parallel at both ends of the stator second winding 120 through a second winding end 122, the first connection site 130 and the second connection site 830, forming a series-parallel hybrid circuit structure as shown in Figure 10 and Figure 11 The rotor 300 is a hollow rotor of ferromagnetic material. In this embodiment, the size of the capacity of the main operating capacitor group 810 is positively correlated with the pulling force output by the pulling force motor, the size of the capacity of the sub operating capacitor group 820 is negatively correlated with the pulling force output by the pulling force motor, and the size variation range of the pulling force output by the pulling force motor in forward rotation and reverse rotation is 10.8% to 16%.

[0061] Embodiment 2: A pulling force motor 900 for fitness field, comprising a stator 200, a rotor 300 and a single-group operating capacitor, that is, the main operating capacitor group 810, that is, different from the first embodiment, this embodiment does not comprise the sub operating capacitor group 820. In this embodiment, the stator 200 also adopts 2-phase multi-pole symmetrical winding, the pole number is 2-phase 6-pole symmetrical winding; and the size of the capacity of the main operating capacitor group 810 or the single operating capacitor group is positively correlated with the pulling force output by the pulling force motor, and the size variation range of the pulling force output by the pulling force motor in forward rotation and reverse rotation is 44% to 60%.

[0062] In order to verify the pulling force motor 900 of the fitness equipment designed in each embodiment of the present application, the above-mentioned embodiments 1 and 2 are tested, the same conditions are adopted in the test, for example, all parameters are based on the same pulling force motor, the test voltage is 220V, only the total capacity of the capacitor circuit structure and the capacitor group is changed, and the following three groups of test results are obtained.

[0063] Test result of the first group: for example 2, the test result of the capacitance of single group running capacitor and the tension motor output tension is as follows.

[0064] 1.1, the tension motor output tension is 60KG when the capacitance is 350μF;

[0065] 1.2, the tension motor output tension is 68KG when the capacitance is 400μF;

[0066] 1.3, the tension motor output tension is 79KG when the capacitance is 450μF.

[0067] It can be seen that the capacitance of single group running capacitor is positively correlated with the tension motor output tension, and the relationship is approximately proportional.

[0068] Test result of the second group: for example 1, under the condition that the capacitance of the secondary running capacitor group is constant and rated as 110μF, the test result of the capacitance of double group running capacitor and the tension motor output tension is as follows.

[0069] 2.1, the tension motor output tension is 44KG when the main capacitance is 350μF;

[0070] 2.2, the tension motor output tension is 52KG when the main capacitance is 400μF;

[0071] 2.3, the tension motor output tension is 58KG when the main capacitance is 450μF.

[0072] It can be seen that the capacitance of double group running capacitor is positively correlated with the tension motor output tension, and the relationship is approximately proportional.

[0073] Test result of the third group: for example 1, under the condition that the capacitance of the main running capacitor group is constant and rated as 400μF, the test result of the capacitance of double group running capacitor and the tension motor output tension is as follows.

[0074] 3.1, the tension motor output tension is 60KG when the secondary capacitance is 60μF;

[0075] 3.2, the tension motor output tension is 52KG when the secondary capacitance is 110μF;

[0076] 3.3, the tension motor output tension is 42KG when the secondary capacitance is 160μF.

[0077] It can be seen that the capacitance of double group running capacitor is negatively correlated with the tension motor output tension, and the relationship is approximately inversely proportional.

[0078] From the analysis of the test results of the above three groups, it can be seen that the change of the capacity of the main operating capacitor group 810 or the single operating capacitor group is positively correlated with the tension output by the tension motor. At the same time, it is also proved that when the double operating capacitor group is added to the secondary operating capacitor group 820, the tension output by the tension motor will decrease. And it is proved that the change of the capacity of the secondary operating capacitor group 820 is negatively correlated with the tension output by the tension motor.

[0079] From the above three sets of test results, it can be seen that the design of double operating capacitor and single operating capacitor has different effects on the tension output by the tension motor. The following further tests the performance difference of double operating capacitor and single operating capacitor used in the tension motor. Four groups of technical index tests are carried out in the same tension motor using double operating capacitor and single operating capacitor, and the specific parameters obtained are as follows.

[0080] A group of technical index test: single operating capacitor 400 μF, generating tension 64 KG.

[0081] A1, no-load power 220V*9.4A*0.9 (power factor) = 1861W;

[0082] A2, full load power (static tension) 220V*11A*1 (power factor) = 2970w;

[0083] A3, full load / empty load power difference percentage:

[0084] 2970W-1861W=1109W;

[0085] 1109W÷1861W=59.59%.

[0086] B group of technical index test: single operating capacitor 450 μF, generating tension 74 KG.

[0087] B1, no-load power 220V*11.6A*0.9 (power factor) = 2296W;

[0088] B2, full load power (static tension) 220V*15A*1 (power factor) = 3300w;

[0089] B3, full load / empty load power difference percentage:

[0090] 3300W-2296W=1004W;

[0091] 1004W÷2296W=43.73%.

[0092] C group of technical index test: double operating capacitor, wherein the main operating capacitor group is 400 μF, the secondary operating capacitor group is 110 μF, and the tension generated is 53 KG.

[0093] C1, no-load power 220V*10.5A*0.9 (power factor) = 2079W;

[0094] C2, full-load power 220V*11A*1 (power factor) = 2420W;

[0095] C3, full-load / no-load power difference percentage:

[0096] 2420W-2079W=341W;

[0097] 341W÷2079W=16.40%.

[0098] D group technical index test: double group running capacitor, wherein the main running capacitor group is 450μF, the auxiliary running capacitor group is 110μF, and a pulling force of 60KG is generated.

[0099] D1, no-load power 220V*12.5A*0.91 (power factor) = 2502W;

[0100] D2, full-load power 220V*12.6A*1 (power factor) = 2772W;

[0101] D3, full-load / no-load power difference percentage:

[0102] 270W÷2502W=10.79%.

[0103] 270W÷2502W=10.79%.

[0104] By comparing the above four groups of technical index tests, it can be clearly seen from the different parameter values above that the full-load / no-load power ratio of the double group running capacitor pulling force motor is 10.8%~16% fluctuation, and the full-load / no-load power ratio of the single group running capacitor pulling force motor is 44%~60% fluctuation, and the output pulling force of the pulling force motor is positively correlated with the output electric power.

[0105] Under various pulling force states, the output pulling force of the single group running capacitor pulling force motor changes by 44%~60%, which is not practically valuable for high-performance fitness equipment, but can be used for strength fitness equipment with low quality requirements and high pulling force requirements. And the output pulling force of the double group running capacitor pulling force motor changes by 10.8%~16%, which is acceptable in high-performance fitness equipment, thus having practical value for high-performance fitness equipment.

[0106] Further, in the tension motor with double sets of operating capacitors, the addition of the auxiliary operating capacitor set reduces the output of the tension, but this is compensated by appropriately increasing the capacitance of the main operating capacitor set; that is, the reduced output of the tension is compensated by increasing the capacitance of the main operating capacitor set. For example, the capacitance of the auxiliary capacitor set is kept at 110 μF, and the capacitance of the main capacitor set is increased from 400 μF to 450 μF, at which time the output tension of the tension motor is increased from 53 kg to 60 kg, thereby solving the problem of the reduced output of the tension caused by the addition of the auxiliary operating capacitor set. From the above data, it can be seen that the technical effect of the auxiliary capacitor set is significant, and the output tension fluctuation of the tension motor can be greatly reduced, and the performance of the tension motor is improved, so that the auxiliary operating capacitor set is beneficial to reducing the tension fluctuation range and forming a stable tension output.

[0107] It should be noted that other embodiments of the present application also include the technical features of the above embodiments combined with each other to form an implementable fitness device and its tension motor.

[0108] The technical features of the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0109] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A resistance motor (900) of a fitness device comprising a stator (200) and a rotor (300), characterized in that, The capacitor and the dual-phase stator winding (100) are further included; The rotor (300) is a hollow rotor of ferromagnetic material; The dual-phase stator winding (100) includes a stator first winding (110) and a stator second winding (120) connected in series, and the stator first winding (110) and the stator second winding (120) are symmetrically arranged; The capacitor includes a main operation capacitor group (810), which is arranged in parallel at both ends of the stator first winding (110); The capacitor further includes a secondary operation capacitor group (820), which is arranged in parallel at both ends of the stator second winding (120); The capacitance of the main operation capacitor group (810) is positively correlated with the pulling force output by the pulling force motor (900) of the fitness equipment, and the capacitance of the secondary operation capacitor group (820) is negatively correlated with the pulling force output by the pulling force motor (900) of the fitness equipment.

2. The resistance motor (900) of the exercise device of claim 1, wherein, The pulling force motor (900) of the fitness equipment further includes a machine shell (600), and the stator (200) and the rotor (300) are arranged inside the machine shell (600); The pulling force motor (900) of the fitness equipment is provided with a first end cover (610) and a second end cover (620) at both ends of the machine shell (600), and the first end cover (610) and the second end cover (620) are respectively detachably mounted at one end of the machine shell (600) for mounting at both ends of the machine shell (600); The pulling force motor (900) of the fitness equipment further includes a shaft core (400) and a rotor support (500), the rotor support (500) is fixedly arranged on the shaft core (400), the rotor (300) is fixed on the rotor support (500), and the shaft core (400) is rotatably arranged in the machine shell (600), and the rotor (300) and the rotor support (500) are located in the machine shell (600); The pulling force motor (900) of the fitness equipment further includes a take-up reel (630) fixed to one end of the shaft core (400), and a pulling force line arranged on the take-up reel (630) in a retractable manner, and the shaft core (400) controls the take-up reel (630) to form a recovered pulling force line state and a released pulling force line state through rotation and rotation direction.

3. The resistance motor (900) of the exercise device of claim 1, wherein, The capacitance of the main operation capacitor group (810) is greater than the capacitance of the secondary operation capacitor group (820).

4. The resistance motor (900) of the exercise device of claim 3, wherein, The stator first winding (110) and the stator second winding (120) have a first connection site (130), the main operation capacitor group (810) and the secondary operation capacitor group (820) have a second connection site (830), and the first connection site (130) is connected with the second connection site (830).

5. The resistance motor (900) of claim 3, wherein, The variation range of the pulling force output by the pulling force motor in forward and reverse rotation is 10.8% to 16%.

6. The resistance motor (900) of the fitness device according to any one of claims 1 to 5, characterized in that, The capacitor cooperates with the voltage regulation of the pulling force motor (900) of the fitness equipment to realize the change of the pulling force.

7. An exercise apparatus characterized by, A resistance motor (900) comprising the fitness device of any one of claims 1 to 6 and a strength fitness equipment connected to the resistance motor (900) of the fitness device, the resistance motor (900) of the fitness device being configured to generate a counter force against the strength fitness equipment.

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