Motor and fitness equipment

Abstract

The utility model relates to the technical field of fitness equipment, and discloses a motor and fitness equipment, and the motor comprises a motor body, a motor rotating shaft, and a sensor module. The motor rotating shaft is rotationally arranged on the motor body; the sensor module comprises an electromagnetic induction element, a first rotor and a second rotor, the electromagnetic induction element is fixed to the motor body, the electromagnetic induction element, the first rotor and the second rotor are arranged on the motor rotating shaft in a sleeving mode, and the first rotor and the second rotor are arranged on the two sides of the electromagnetic induction element in the axial direction of the motor rotating shaft respectively. The motor rotating shaft is at least used for driving the first rotor and the second rotor to rotate; the electromagnetic induction element is used for generating an alternating magnetic field and generating induction voltage, the first rotor is used for measuring the rotation angle of a motor rotating shaft, and the second rotor is used for measuring the rotation angle of the first rotor. The motor provided by the utility model aims to solve the technical problem of inaccurate angle measurement caused by using a Hall sensor to measure the number of rotation turns of the output shaft of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness equipment, in particular to a motor and fitness equipment. Background Art

[0002] Rope fitness equipment is a widely used type of fitness equipment. This type of fitness equipment applies resistance to the rope through a motor, so that the fitness person can pull the rope back and forth or be driven by the rope to exercise. During use, it is necessary to adjust the size of the resistance applied by the motor according to the extension length of the rope, and then it is necessary to record the number of turns and angle of the motor output shaft to calculate the extension length of the rope.

[0003] In the related art, the number of rotations of the output shaft of the motor is generally measured by a Hall sensor. However, this method may result in inaccurate angle measurement, and the process of using the Hall sensor is relatively complicated and the production cost is high. Utility Model Content

[0004] The utility model aims to provide a motor and fitness equipment to solve the technical problem of inaccurate angle measurement caused by using a Hall sensor to measure the number of rotations of the output shaft of the motor.

[0005] In a first aspect, the utility model provides a motor, comprising a motor body, a motor shaft and a sensor module; the motor shaft is rotatably disposed on the motor body;

[0006] The sensor module includes an electromagnetic induction element, a first rotor and a second rotor, wherein the electromagnetic induction element is fixed to the motor body, the electromagnetic induction element, the first rotor and the second rotor are respectively sleeved on the motor shaft, and the first rotor and the second rotor are respectively arranged on both sides of the electromagnetic induction element along the axial direction of the motor shaft, and the motor shaft is at least used to drive the first rotor and the second rotor to rotate;

[0007] The electromagnetic induction element is used to generate an alternating magnetic field and an induced voltage, the first rotor is used to measure the rotation angle of the motor shaft, and the second rotor is used to measure the rotation angle of the first rotor.

[0008] In the motor of the present application, the first rotor includes a ring-shaped annular portion and a blade portion arranged outside the annular portion, the annular portion is used to connect with the motor shaft, and the blade portion is used to induce the electromagnetic induction element to generate a signal.

[0009] In the motor of the present application, the blade portion is in a semicircular arc shape.

[0010] In the motor of the present application, the blade portion and the annular portion are formed integrally.

[0011] In the motor of the present application, the second rotor includes a plurality of pairs of rotor blades, and the plurality of pairs of rotor blades are distributed at intervals along the radial direction of the motor shaft.

[0012] In the motor of the present application, a plurality of pairs of the rotor blades are distributed at equal intervals along the radial direction of the motor shaft.

[0013] In the motor of the present application, the first rotor is arranged above the electromagnetic induction element, and the second rotor is arranged below the electromagnetic induction element; or the first rotor is arranged below the electromagnetic induction element, and the second rotor is arranged above the electromagnetic induction element.

[0014] In the motor of the present application, the electromagnetic induction element includes an electromagnetic induction plate, an excitation coil and a receiving coil. The excitation coil and the receiving coil are arranged inside the electromagnetic induction plate. The excitation coil is used to generate the alternating magnetic field, and the receiving coil is used to generate the induced voltage.

[0015] In the motor of the present application, the motor body includes a shell and an end cover, the shell is provided with an opening, the end cover is fixed to the opening, the motor shaft is provided at the center of the shell and passes through the end cover, and the electromagnetic induction element is fixed to the end cover.

[0016] In a second aspect, the utility model provides a fitness device, which comprises:

[0017] Ropes, and

[0018] The motor, the rope is connected to the motor shaft.

[0019] The utility model provides a motor, which has the following beneficial effects:

[0020] The electromagnetic induction element, the first rotor and the second rotor of the utility model are all provided with mounting holes, and the electromagnetic induction element is fixedly mounted on the motor body, and the first rotor and the second rotor are sleeved on the motor shaft and the two are respectively located above and below the electromagnetic induction element, and the first rotor and the second rotor can rotate with the motor shaft. When in use, the motor shaft drives the electromagnetic induction element, the first rotor and the second rotor to rotate relative to the electromagnetic induction element. Based on the electromagnetic induction principle, the electromagnetic induction element can generate an alternating magnetic field, and the first rotor and the second rotor induce the alternating magnetic field, thereby generating an induced current. Under the action of the induced current, the first rotor and the second rotor generate a secondary magnetic field, and the electromagnetic induction element generates an induced voltage under the action of the secondary magnetic field. By measuring the periodically changing induced voltage, the first rotor measures the rotation angle of the motor shaft, and the second rotor measures the rotation angle of the first rotor, thereby refining the rotation angle of the motor shaft, and then more accurately measuring the actual rotation angle of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the structure of a motor provided in an embodiment of the utility model;

[0023] Figure 2 An exploded schematic diagram of a motor provided by an embodiment of the utility model;

[0024] Figure 3 A front view of a motor provided by an embodiment of the utility model;

[0025] Figure 4 for Figure 3 Cross-sectional view along the middle line BB;

[0026] Figure 5 A schematic diagram of the structure of a first rotor provided in an embodiment of the utility model;

[0027] Figure 6 A schematic diagram of the structure of a second rotor provided in an embodiment of the utility model;

[0028] Figure 7 A schematic diagram of the structure of an electromagnetic induction element provided in an embodiment of the utility model;

[0029] Figure 8 Another exploded schematic diagram of a motor provided by an embodiment of the utility model;

[0030] Fig. 9 for Figure 8 A partial enlarged view of point A in the middle.

[0031] The following are marked in the figure:

[0032] 10. Motor body; 101. Shell; 102. End cover; 20. Motor shaft; 30. Sensor module; 31. First rotor; 311. Ring portion; 312. Blade portion; 32. Second rotor; 321. Rotor blade; 33. Electromagnetic induction element; 331. Electromagnetic induction plate; 40. Locking ring; 50. Bushing; 51. Square spline. DETAILED DESCRIPTION

[0033] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices and elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0036] In the related art, an angle sensor is a device used to measure the angle or rotational position of an object relative to a reference direction. It can detect the rotation angle of an object and convert it into an electrical signal or digital signal output for monitoring, control or feedback applications. Angle sensors usually use different working principles (such as optics, capacitance, magnetism or ultrasound, etc.) to detect the rotation or rotation of an object and output the corresponding angle information.

[0037] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a motor, including a motor body 10, a motor shaft 20 and a sensor module 30; the motor shaft 20 is rotatably arranged on the motor body 10; the sensor module 30 includes an electromagnetic induction element 33, a first rotor 31 and a second rotor 32, the electromagnetic induction element 33 is fixed to the motor body 10, the electromagnetic induction element 33, the first rotor 31 and the second rotor 32 are respectively sleeved on the motor shaft 20, and the first rotor 31 and the second rotor 32 are respectively arranged on both sides of the electromagnetic induction element 33 along the axial direction of the motor shaft 20, and the motor shaft 20 is at least used to drive the first rotor 31 and the second rotor 32 to rotate; wherein, the electromagnetic induction element 33 is used to generate an alternating magnetic field and to generate an induced voltage, the first rotor 31 is used to measure the rotation angle of the motor shaft 20, and the second rotor 32 is used to measure the rotation angle of the first rotor 31.

[0038] Based on the above technical solution, in this embodiment, the electromagnetic induction element 33, the first rotor 31 and the second rotor 32 are all provided with mounting holes, the electromagnetic induction element 33 is fixedly mounted on the motor body 10, the first rotor 31 and the second rotor 32 are sleeved on the motor shaft 20 and are respectively located above and below the electromagnetic induction element 33, and the first rotor 31 and the second rotor 32 can rotate with the motor shaft 20. When in use, the motor shaft 20 drives the first rotor 31 and the second rotor 32 to rotate relative to the electromagnetic induction element 33. Based on the electromagnetic induction principle, the electromagnetic induction element 33 can generate an alternating magnetic field, and the first rotor 31 and the second rotor 32 induce the alternating magnetic field, thereby generating an induced current. Under the action of the induced current, the first rotor 31 and the second rotor 32 generate a secondary magnetic field, and the electromagnetic induction element 33 generates an induced voltage under the action of the secondary magnetic field. By measuring the periodically changing induced voltage, the first rotor 31 measures the rotation angle of the motor shaft 20, and the second rotor 32 measures the rotation angle of the first rotor 31, thereby refining the rotation angle of the motor shaft 20, and then more accurately measuring the actual rotation angle of the motor.

[0039] In some embodiments, Figure 7 As shown, the electromagnetic induction element 33 includes an electromagnetic induction plate 331, an excitation coil and a receiving coil (not shown in the drawings). The excitation coil and the receiving coil are arranged inside the electromagnetic induction plate 331. The excitation coil is used to generate an alternating magnetic field, and the receiving coil is used to generate an induced voltage.

[0040] Specifically, the electromagnetic induction plate 331 includes an excitation coil and a receiving coil, and the excitation coil and the receiving coil are planar spiral coils. Generally, the more turns the excitation coil has, the greater the inductance. When in use, by passing a high-frequency AC signal into the excitation coil, the excitation coil generates a corresponding alternating magnetic field, and the receiving coil is induced to generate an induced voltage. As the electromagnetic induction plate 331 rotates with the motor shaft 20, the voltage signal induced by the receiving coil will change periodically, thereby forming a mapping relationship with the first rotor 31, and the rotation angle of the first rotor 31 is determined according to the voltage signal of the receiving coil.

[0041] In some embodiments, Figure 5 As shown, the first rotor 31 includes a ring-shaped annular portion 311 and a blade portion 312 arranged outside the annular portion 311 . The annular portion 311 is used to connect with the motor shaft 20 , and the blade portion 312 is used to induce the electromagnetic induction element 33 to generate a signal.

[0042] Specifically, the annular portion 311 of the first rotor 31 is sleeved on the motor shaft 20, that is, the first rotor 31 is connected to the motor shaft 20 through the annular portion 311, ensuring that the first rotor 31 can rotate with the motor shaft 20. The blade portion 312 is arranged outside the annular portion 311, that is, the outer diameter of the blade portion 312 is larger than the outer diameter of the annular portion 311. When the annular portion 311 rotates with the motor shaft 20, the blade portion 312 rotates accordingly, and the electromagnetic induction element 33 generates an alternating magnetic field. The blade portion 312 of the first rotor 31 induces the alternating magnetic field to generate an induced current. Under the action of the induced current, the first rotor 31 generates a secondary magnetic field, and the electromagnetic induction element 33 generates a periodically changing induced voltage under the action of the secondary magnetic field. By measuring the periodically changing induced voltage signal, the first rotor 31 can measure the rotation angle of the motor shaft 20.

[0043] In some embodiments, Figure 5 As shown, the blade portion 312 is in a semicircular arc shape.

[0044] Specifically, since the distance between the blade portion 312 and the electromagnetic induction element 33 remains basically consistent over the entire arc area, the blade portion 312 is designed into a semicircular arc shape to achieve a uniform magnetic field sensing effect. The magnetic field sensing signal generated when the blade portion 312 moves is also more uniform, which helps to improve the stability and accuracy of the sensing signal.

[0045] In some embodiments, Figure 5 As shown, the blade portion 312 and the annular portion 311 are integrally formed.

[0046] Specifically, the blade portion 312 and the annular portion 311 are integrally formed, which, on the one hand, can form a tighter connection, reduce the joints between the blade portion 312 and the annular portion 311, enhance the stability of the first rotor 31, reduce looseness or vibration that may occur during rotation, and improve the reliability and durability of the first rotor 31. On the other hand, integral molding can reduce the number of components and simplify the production process. Compared with the need to process and assemble the blade portion 312 and the annular portion 311 separately, the integral molding of the first rotor 31 completes the formation of the entire structure through a single manufacturing process, reducing production costs and manufacturing cycles. Since the blade portion 312 and the annular portion 311 are integrally formed, no additional joining steps are required during the assembly process, which simplifies the assembly process and reduces the possibility of errors or problems during the assembly process.

[0047] In some embodiments, Figure 6 As shown, the second rotor 32 includes a plurality of pairs of rotor blades 321 , and the plurality of pairs of rotor blades 321 are distributed at intervals along the radial direction of the motor shaft 20 .

[0048] Specifically, the motor shaft 20 drives the electromagnetic induction element 33, the first rotor 31 and the second rotor 32 to rotate, and the rotor blades 321 rotate with the motor shaft 20. The electromagnetic induction element 33 generates an alternating magnetic field. The blade portion 312 of the first rotor 31 and the rotor blades 321 of the second rotor 32 induce the alternating magnetic field to generate an induced current. The electromagnetic induction element 33 generates an induced voltage under the action of the secondary magnetic field. By measuring the periodically changing voltage formed by multiple pairs of rotor blades 321, the rotor blades 321 indirectly measure the rotation angle of the blade portion 312, and then accurately calculate the extension and contraction length of the rope.

[0049] In some embodiments, Figure 6 As shown, a plurality of pairs of rotor blades 321 are distributed at equal intervals along the radial direction of the motor shaft 20 .

[0050] Specifically, by distributing the rotor blades 321 at equal intervals in the radial direction, it is possible to ensure that the rotor blades 321 are evenly distributed in the direction of the motor shaft 20, so that the rotor blades 321 can more accurately detect the rotation angle change of the blade portion 312. Regardless of the angle to which the blade portion 312 rotates, the rotor blades 321 will be affected by the external force or magnetic field, thereby achieving accurate perception of the rotation angle. The equal intervals of the rotor blades 321 can improve the stability of the second rotor 32 and prevent the second rotor 32 from having an unbalanced rotation during movement.

[0051] In some embodiments, the first rotor 31 is disposed above the electromagnetic induction element 33 , and the second rotor 32 is disposed below the electromagnetic induction element 33 ; or the first rotor 31 is disposed below the electromagnetic induction element 33 , and the second rotor 32 is disposed above the electromagnetic induction element 33 .

[0052] Specifically, Figure 2 As shown, the first rotor 31 is arranged above the electromagnetic induction element 33, and the second rotor 32 is arranged below the electromagnetic induction element 33. During installation, the second rotor 32, the electromagnetic induction element 33 and the first rotor 31 are successively sleeved on the motor shaft 20 to complete the fixing of the sensor module 30 on the motor body 10. Alternatively, Figure 3 As shown, the first rotor 31 is arranged below the electromagnetic induction element 33, and the second rotor 32 is arranged above the electromagnetic induction element 33. During installation, the first rotor 31, the electromagnetic induction element 33 and the second rotor 32 are successively sleeved on the motor shaft 20 to complete the fixation of the sensor module 30 on the motor body 10.

[0053] In some embodiments, Figure 2 or Figure 3As shown, the motor body 10 includes a shell 101 and an end cover 102 . The shell 101 is provided with an opening, and the end cover 102 is fixed to the opening. The motor shaft 20 is provided at the center of the shell 101 and passes through the end cover 102 . The electromagnetic induction element 33 is fixed to the end cover 102 .

[0054] Specifically, the housing 101 is provided with bolt holes, and the end cover 102 is also provided with bolt holes correspondingly. The end cover 102 is aligned with the opening of the housing 101, and bolts are passed through the bolt holes to fix the end cover 102 to the opening of the housing 101. During installation, the electromagnetic induction element 33 is sleeved on the motor shaft 20 and fixed to the end cover 102, so that the electromagnetic induction element 33 is tightly fixed inside the motor structure, ensuring that the relative position of the electromagnetic induction element 33 and the blade portion 312 and the rotor blade 321 is stable. The motor shaft 20 is fixed at the center of the housing 101 and passes through the end cover 102, which can prevent the motor shaft 20 from being offset due to vibration or external force.

[0055] In this embodiment, since the end cover 102 is detachable and the electromagnetic induction element 33 is fixed on the end cover 102, when the inside of the motor needs to be inspected or parts replaced, the end cover 102 can be directly removed without disassembling the entire motor structure, saving maintenance time and cost.

[0056] In some embodiments, Figures 2 to 4 as well as Figure 8 , Fig. 9 As shown, the motor further includes a locking ring 40 and a bushing 50 . The bushing 50 is sleeved on the motor shaft 20 . The first rotor 31 and the second rotor 32 can be locked on the bushing 50 by the locking ring 40 so as to rotate with the rotation of the motor shaft 20 .

[0057] Furthermore, the outer wall of the motor shaft 20 and the inner wall of the bushing 50 may be formed with matching square splines 51 to prevent the bushing 50 from rotating relative to the motor shaft 20 when the motor shaft 20 rotates, thereby better driving the rotation of the first rotor 31 and the second rotor 32.

[0058] A step may be formed on the outer peripheral wall of the bushing 50 for clamping the rotor. When the rotor is mounted on the bushing 50, the rotor is clamped tightly on the step by the locking ring 40 to prevent the rotor from rotating relative to the bushing 50. It should be noted that the locking ring 40 and the bushing 50 can be fastened and connected by threads, which is convenient and also convenient for replacing the rotor.

[0059] In a second aspect, an embodiment of the utility model provides a fitness device (not shown in the drawings), which includes a rope and a motor, and the rope is connected to the motor shaft 20.

[0060] Specifically, the electromagnetic induction element 33, the first rotor 31 and the second rotor 32 are driven to rotate by the motor shaft 20, the first rotor 31 measures the rotation angle of the motor shaft 20, and the second rotor 32 measures the rotation angle of the first rotor 31 to further measure the rotation angle of the motor shaft 20, thereby accurately calculating the extension and contraction length of the rope.

[0061] It should be understood that the term "and / or" used in the present utility model specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "including a..." does not exclude the presence of other identical elements in the process, method, article or system including the element.

[0062] The serial numbers of the embodiments of the utility model are only for description and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A motor, characterized in that: It includes a motor body, a motor shaft and a sensor module; the motor shaft is rotatably arranged on the motor body; The sensor module includes an electromagnetic induction element, a first rotor and a second rotor, wherein the electromagnetic induction element is fixed to the motor body, the electromagnetic induction element, the first rotor and the second rotor are respectively sleeved on the motor shaft, and the first rotor and the second rotor are respectively arranged on both sides of the electromagnetic induction element along the axial direction of the motor shaft, and the motor shaft is at least used to drive the first rotor and the second rotor to rotate; The electromagnetic induction element is used to generate an alternating magnetic field and an induced voltage, the first rotor is used to measure the rotation angle of the motor shaft, and the second rotor is used to measure the rotation angle of the first rotor.

2. The motor according to claim 1, characterized in that The first rotor includes a ring-shaped annular portion and a blade portion arranged outside the annular portion, the annular portion is used to be connected to the motor shaft, and the blade portion is used to induce the electromagnetic induction element to generate a signal.

3. The motor according to claim 2, characterized in that The blade portion is in a semicircular arc shape.

4. The motor according to claim 2, characterized in that The blade portion and the annular portion are integrally formed.

5. The motor according to claim 2, characterized in that: The second rotor includes a plurality of pairs of rotor blades, and the plurality of pairs of rotor blades are distributed at intervals along the radial direction of the motor shaft.

6. The motor according to claim 5, characterized in that The plurality of pairs of rotor blades are distributed at equal intervals along the radial direction of the motor shaft.

7. The motor according to claim 1, characterized in that The first rotor is disposed above the electromagnetic induction element, and the second rotor is disposed below the electromagnetic induction element; or the first rotor is disposed below the electromagnetic induction element, and the second rotor is disposed above the electromagnetic induction element.

8. The electric machine according to any one of claims 1 to 7, characterized in that The electromagnetic induction element comprises an electromagnetic induction plate, an excitation coil and a receiving coil. The excitation coil and the receiving coil are arranged inside the electromagnetic induction plate. The excitation coil is used to generate the alternating magnetic field, and the receiving coil is used to generate the induced voltage.

9. The motor according to claim 1, characterized in that The motor body comprises a shell and an end cover, the shell is provided with an opening, the end cover is fixed to the opening, the motor shaft is arranged at the center of the shell and passes through the end cover, and the electromagnetic induction element is fixed to the end cover.

10. A fitness equipment, characterized in that: include: Ropes, and The motor according to any one of claims 1 to 9, wherein the rope is connected to the motor shaft.

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