Driving motor and fitness equipment

Abstract

The utility model discloses a driving motor and fitness equipment, and the driving motor comprises a motor body which comprises a housing, and a stator and a rotor which are disposed in the housing; the rotor comprises a rotor rotating shaft, the shell comprises a shell, a front end cover and a rear end cover, and the rotor rotating shaft and the rear end cover can rotate relatively; end portions, facing the rear end cover, of the rotor rotating shafts are provided with encoder magnetic steel through magnetic steel sleeves. The magnetic steel sleeve is provided with a magnetic steel mounting groove, and the encoder magnetic steel is completely accommodated in the magnetic steel mounting groove; an encoder chip is fixedly arranged on the rear end cover, and the encoder chip and the encoder magnetic steel are coaxially arranged. The magnetic steel sleeve is arranged at the end part of the rotating shaft of the rotor, and the encoder magnetic steel is completely accommodated and protected in the magnetic steel sleeve, so that the structural length is not increased, and the situation that the position of the encoder magnetic steel is changed due to the fact that the encoder magnetic steel is influenced by the rotation of the rotor, so that a magnetic field is changed is avoided; and meanwhile, damage to encoder magnetic steel caused by vibration and impact generated by rotation of the rotor is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of fitness machinery, and in particular to a driving motor and fitness equipment using the same. Background Art

[0002] In the field of commercial digital strength fitness equipment, motors are commonly used to provide power and resistance. Traditional servo motors are generally large in size and low in power density, which cannot effectively utilize the space of the entire machine. The magnetic ring encoder is easily affected by the rotation of the rotor, resulting in reduced stability and reliability. Therefore, a commercial fitness equipment drive motor with high power density and reasonable structural layout is needed. Utility Model Content

[0003] The purpose of the embodiments of the utility model is to provide a driving motor which can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] In one aspect, a driving motor is provided, comprising:

[0006] The motor body comprises a rotor shaft and a rear end cover, wherein the rotor shaft and the rear end cover can rotate relative to each other;

[0007] The end of the rotor shaft facing the rear end cover is equipped with an encoder magnet through a magnet sleeve; the magnet sleeve has a magnet installation groove, and the encoder magnet is completely received in the magnet installation groove;

[0008] An encoder chip is fixedly arranged on the rear end cover, and the encoder chip (160) is coaxially arranged with the encoder magnetic steel.

[0009] By arranging a magnetic steel sleeve at the end of the rotor shaft and completely housing and protecting the encoder magnet in the magnetic steel sleeve, the structural length is not increased, and the encoder magnet is prevented from being affected by the rotation of the rotor, causing the position of the encoder magnet to change, thereby causing the magnetic field to change. At the same time, the vibration and impact caused by the rotation of the rotor are avoided, which may cause damage to the encoder magnet.

[0010] Optionally, a first mounting groove is provided on the rotor shaft, and the magnetic steel sleeve is embedded in the first mounting groove.

[0011] By arranging the magnetic steel sleeve in the first mounting groove on the rotor shaft, the length in the axial direction is further reduced and the volume of the drive motor is reduced.

[0012] Optionally, an exhaust hole is provided on the magnetic steel sleeve and passes through the axial direction of the rotor shaft.

[0013] When the magnetic steel sleeve is installed in the first installation groove, the gas between the magnetic steel sleeve and the rotor shaft can be discharged through the exhaust hole.

[0014] Optionally, the encoder magnet is fixedly installed in the magnet installation groove by interference fit.

[0015] Optionally, the magnetic steel sleeve is made of non-magnetic material.

[0016] The magnetic steel sleeve made of non-magnetic conductive material can prevent eddy current loss between the encoder magnetic steel and the rotor shaft, and can prevent electromagnetic interference between the magnetic steel encoder and the rotor shaft.

[0017] Optionally, an encoder bracket is fixedly mounted on the rear end cover, and the encoder chip is fixedly connected to the rear end cover via the encoder bracket.

[0018] Optionally, it also includes:

[0019] A housing, wherein the rear end cover is buckled on the housing;

[0020] A cooling fan is arranged on a side wall of the housing;

[0021] A plurality of heat dissipation ribs are arranged on the surface of the shell, and the heat dissipation fan is installed on the heat dissipation ribs.

[0022] By arranging heat dissipation ribs on the surface of the shell and arranging the heat dissipation fan on the heat dissipation ribs, the heat dissipation effect of the shell can be increased, thereby ensuring uniform heat dissipation inside the motor, thereby extending the life of the drive motor and increasing its power density.

[0023] Optionally, the shell has a first heat dissipation area and a second heat dissipation area, the first heat dissipation area and the second heat dissipation area are both provided with the heat dissipation ribs, and the heat dissipation fan is arranged in the first heat dissipation area or the second heat dissipation area.

[0024] Optionally, the height of the heat dissipation ribs is a, the distance between adjacent heat dissipation ribs is b, and the ratio of the height of the heat dissipation ribs to the distance between the heat dissipation ribs is 1<a / b<1.5.

[0025] Optionally, the number of heat dissipation ribs in the first heat dissipation area and the second heat dissipation area is 7-10.

[0026] On the other hand, a fitness equipment is provided, which has the driving motor as described above.

[0027] The beneficial effects of the present application are as follows: in the present application, a magnetic steel sleeve is arranged at the end of the rotor shaft, and the encoder magnet is completely housed and protected in the magnetic steel sleeve, without increasing the length of the structure, and at the same time, the encoder magnet is prevented from being affected by the rotation of the rotor, causing the position of the encoder magnet to change, thereby causing the magnetic field to change, and at the same time, the vibration and impact caused by the rotation of the rotor is avoided, which may cause damage to the encoder magnet.

[0028] The driving motor as described above has a small size, high resistance control accuracy and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present application is further described in detail below based on the drawings and embodiments.

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the driving motor described in the embodiment of the present application;

[0031] Figure 2 A schematic side view of a drive motor according to an embodiment of the present application;

[0032] Figure 3 is a cross-sectional schematic diagram of a drive motor according to an embodiment of the present application;

[0033] Figure 4 for Figure 3 A partial enlarged view of the middle part;

[0034] Figure 5 This is a cross-sectional view of the magnetic steel sleeve structure described in an embodiment of the present application.

[0035] In the figure:

[0036] 100, motor body; 110, shell; 111, casing; 112, front cover; 113, rear cover; 120, stator; 130, rotor; 131, rotor shaft; 1311, first mounting groove; 1312, process hole; 140, magnetic steel sleeve; 141, magnetic steel mounting groove; 142, exhaust hole; 150, encoder magnetic steel; 160, encoder chip; 170, encoder bracket; 180, first heat dissipation area; 190, second heat dissipation area; 200, cooling fan. DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0038] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] Fitness servo resistance motor is a servo motor used in fitness equipment. It uses electromagnetic resistance to generate resistance and has the following advantages: high resistance adjustment accuracy, the resistance size can be controlled by changing the excitation current of the motor to achieve stepless resistance adjustment. Low noise level, no mechanical transmission mechanism is required, so the noise level is low. Small size and light weight, no mechanical transmission mechanism is required, so the size and weight are small.

[0041] Since fitness users have different strength levels and require different resistance intensities, high resistance adjustment accuracy can well meet the usage requirements of different users. At the same time, the low noise level can make the working environment quiet and improve the user experience. The small size and light weight can reduce the floor space and facilitate transportation and relocation. Therefore, fitness servo resistance motors are currently widely used.

[0042] Existing fitness servo resistance motors usually rely on magnetic ring encoders to measure and feedback the motor's speed and position, and feed back the motor's speed or position information to the control system, which controls the motor based on the feedback information to achieve precise motion control. However, due to the unreasonable setting of the magnetic ring encoder, the size of the fitness servo resistance motor will increase. At the same time, the magnetic ring encoder is easily affected by the rotation of the rotor, resulting in reduced stability and reliability, which makes it unable to meet the use requirements of high resistance adjustment accuracy in the fitness field.

[0043] In addition, the existing fitness servo resistance motors on the market have a relatively high temperature rise because the shell design does not take into account the issue of optimized heat dissipation, further limiting the life and power density of the fitness servo resistance motors.

[0044] Based on the above-mentioned technical problems existing in the existing fitness servo resistance motor, the present application provides a driving motor, which has a reasonable internal structure layout, small size, a more stable and reliable magnetic ring encoder, and a heat dissipation structure is arranged on the shell, which extends the life of the fitness servo resistance motor and can increase its power density.

[0045] Specifically, Figure 1-5 As shown, an embodiment of the present application provides a driving motor, including: a motor body 100, including a shell 110 and a stator 120 and a rotor 130 arranged in the shell 110; the shell 110 plays a role in protecting the internal structure of the motor, the stator 120 is the stationary part of the motor, and is composed of a winding and an iron core, and the rotor 130 is the rotating part of the motor, and is composed of a rotor shaft 131, a rotor core and a rotor 0 winding.

[0046] Among them, the stator and rotor are the parts that generate torque in the motor. The stator winding generates a magnetic field by energizing it, and the rotor winding generates current under the action of the stator magnetic field. The magnetic field generated by the current in the rotor winding interacts with the stator magnetic field to generate torque.

[0047] The rotor 130 includes a rotor shaft 131, and the housing 110 includes a casing 111, a front cover 112, and a rear cover 113. The rotor shaft 131 and the rear cover 113 can rotate relative to each other.

[0048] An encoder magnet 150 is installed at the end of the rotor shaft 131 facing the rear end cover 113 through a magnetic sleeve 140; the magnetic sleeve 140 is a component for fixing the encoder magnet 150, and has a magnetic mounting groove 141, and the encoder magnet 150 is completely accommodated in the magnetic mounting groove 141; an encoder chip 160 is fixedly installed on the rear end cover 113, and the encoder chip 160 is coaxially arranged with the encoder magnet 150.

[0049] It is understandable that in the traditional structure, the encoder magnet 150 is usually directly magnetically attracted to the rotor shaft 131. When the rotor shaft 131 rotates, the encoder magnet 150 is easily affected by inertia and changes position with it, which affects the stability of the encoder output signal.

[0050] In the present application, a magnetic steel sleeve 140 is arranged at the end of the rotor shaft 131, and the encoder magnet 150 is completely housed and protected in the magnetic steel sleeve 140, without increasing the length of the structure. At the same time, the encoder magnet 150 is prevented from being affected by the rotation of the rotor 130, causing the position of the encoder magnet 150 to change, thereby causing the magnetic field to change. At the same time, the rotation of the rotor 130 can avoid vibration and impact that may cause damage to the encoder magnet 150.

[0051] For example, refer to Figure 3-4 As shown, the rotor shaft 131 is provided with a first mounting groove 1311, and the magnetic steel sleeve 140 is embedded in the first mounting groove 1311. By arranging the magnetic steel sleeve 140 in the first mounting groove 1311 on the rotor shaft 131, the length in the axial direction is further reduced, and the volume of the drive motor is reduced.

[0052] The present application also provides a specific connection method between the magnetic steel sleeve 140 and the rotor shaft 131. Figure 4 As shown, a process hole 1312 is provided on the rotor shaft 131, and an exhaust hole 142 is provided on the magnetic steel sleeve 140 along the axial direction of the rotor shaft 131. When the magnetic steel sleeve 140 is installed in the first installation groove 1311, the gas between the magnetic steel sleeve 140 and the rotor shaft 131 is discharged through the exhaust hole 142.

[0053] It should be pointed out that in the process of installing the magnetic steel sleeve 140 to the rotor shaft 131, the two are tightly fitted together and are therefore roughly in a sealed state. After the end surface of the magnetic steel sleeve 140 facing the rotor shaft 131 has completely entered the first installation groove 1311, if the gas between the two is not discharged, the air pressure will cause the magnetic steel sleeve 140 to be unable to be installed in the rotor shaft 131. The exhaust hole 142 provided in this embodiment can discharge the above-mentioned gas.

[0054] In this embodiment, the encoder magnet 150 , the magnet sleeve 140 and the rotor shaft 131 are installed in the following manner: the encoder magnet 150 is installed in the first installation groove 1311 after the magnet sleeve 140 is fixed to the rotor shaft 131 .

[0055] Preferably, in this embodiment, the process hole 1312 and the exhaust hole 142 are both located on the rotation axis of the rotor shaft 131 .

[0056] It is understandable that the exhaust hole is not only required to discharge the gas between the rotor shaft 131 and the magnetic steel sleeve 140, but also needs to prevent the first installation groove from being sealed and affecting the disassembly of the magnetic steel sleeve 140. The process hole 1312 and the exhaust hole 142 are arranged to partially overlap so that the two are connected, which can prevent the above situation from occurring.

[0057] It should be pointed out that the process hole 1312 in this embodiment is a positioning hole used for turning positioning when machining the rotor shaft 131 .

[0058] Reference Figure 4 As shown, the encoder magnet 150 is fixedly installed in the magnet installation slot 141 by interference fit. The magnet installation slot 141 is a circular structure, and its center is located on the rotation axis of the rotor shaft 131.

[0059] It should be pointed out that the magnetic steel sleeve 140 described in the embodiment of the present application is made of non-magnetic conductive material.

[0060] The magnetic sleeve 140 made of non-magnetic material can prevent eddy current loss between the encoder magnet 150 and the rotor shaft 131. If the magnetic sleeve 140 is made of magnetic material, eddy current loss will be generated in the magnetic sleeve 140 when the rotor 130 rotates. The eddy current loss will generate heat, thereby reducing the magnetic strength of the magnet.

[0061] Furthermore, it can prevent electromagnetic interference between the magnetic steel encoder and the rotor shaft 131. If the magnetic steel sleeve 140 is made of magnetic conductive material, an induced current will be generated in the magnetic steel sleeve 140 when the rotor 130 rotates. The induced current will generate electromagnetic interference and affect the normal operation of the encoder.

[0062] Optionally, the magnetic steel sleeve 140 can be made of non-magnetic metal materials such as stainless steel, aluminum, copper, etc., or made of plastic materials such as nylon, polycarbonate, polypropylene, etc. Metal materials have high strength and wear resistance, and can effectively protect the magnetic steel from damage. Plastic materials have light weight and good corrosion resistance, which can reduce the cost of the magnetic steel sleeve 140.

[0063] Further, see Figure 4 As shown, in the embodiment of the present application, an encoder bracket 170 is fixedly mounted on the rear end cover 113 , and the encoder chip 160 is fixedly connected to the rear end cover 113 via the encoder bracket 170 .

[0064] The encoder chip 160 is fixedly connected to the rear end cover 113 via the encoder bracket 170 , which can improve the stability of the encoder chip 160 . The encoder chip 160 can be disassembled by disassembling the rear end cover 113 , which facilitates the installation and maintenance of the encoder chip 160 .

[0065] Reference Figure 1-3 As shown, the drive motor described in the embodiment of the present application further includes: a heat dissipation fan 200, which is arranged on the side wall of the housing 110; a plurality of heat dissipation ribs are arranged on the surface of the housing 110, and the heat dissipation fan 200 is installed on the heat dissipation ribs. The wind direction of the heat dissipation fan 200 is to blow towards the heat dissipation ribs.

[0066] In the prior art, heat dissipation of the motor is usually only achieved by using heat dissipation fins, or by using a heat dissipation fan 200 to dissipate the heat of the rotating part of the motor. In this solution, heat dissipation ribs are provided on the surface of the housing 110, and the heat dissipation fan 200 is provided on the heat dissipation ribs. This can increase the heat dissipation effect of the housing 110, thereby ensuring uniform heat dissipation inside the motor, thereby extending the life of the drive motor and increasing its power density.

[0067] Specifically, refer to Figure 1 As shown, the housing 110 has a first heat dissipation area 180 and a second heat dissipation area 190 , both of which are provided with heat dissipation ribs, and the heat dissipation fan 200 is disposed in the first heat dissipation area 180 or the second heat dissipation area 190 .

[0068] It should be pointed out that the fact that the shell 110 has the first heat dissipation area 180 and the second heat dissipation area 190 does not limit the present application. In other embodiments, it may have only one heat dissipation area, or three or four heat dissipation areas, and a heat dissipation fan 200 may be provided on the heat dissipation ribs of one or more of the heat dissipation areas.

[0069] The embodiment of the present application further provides a specific installation method for the heat dissipation fan 200. A threaded hole is provided on the end surface of the heat dissipation rib away from the housing 110. The heat dissipation fan 200 is fixed to the heat dissipation rib by means of screws and threaded holes.

[0070] The height of the heat dissipation ribs in the present application is a, the distance between adjacent heat dissipation ribs is b, and the ratio between the height of the heat dissipation ribs and the distance between the heat dissipation ribs is 1<a / b<1.5.

[0071] Preferably, a / b=1.39.

[0072] At the same time, in the present application, the number of heat dissipation ribs in the first heat dissipation area 180 and the second heat dissipation area 190 is 7-10, preferably 9.

[0073] At the same time, the embodiment of the present application also provides a fitness equipment having a driving motor as described above, which has a small size, high resistance control accuracy and a long service life.

[0074] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and other directions or positional relationships are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of this application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0075] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0076] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0077] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the present application without creative work, and these methods will fall within the scope of protection of the present application.

Claims

1. A driving motor, characterized in that: include: The motor body (100) comprises a rotor shaft (131) and a rear end cover (113), wherein the rotor shaft (131) and the rear end cover (113) are relatively rotatable. An encoder magnet (150) is installed at the end of the rotor shaft (131) facing the rear end cover (113) through a magnet sleeve (140); the magnet sleeve (140) has a magnet installation groove (141), and the encoder magnet (150) is completely received in the magnet installation groove (141); An encoder chip (160) is fixedly arranged on the rear end cover (113), and the encoder chip (160) is coaxially arranged with the encoder magnetic steel (150).

2. The drive motor according to claim 1, characterized in that: The rotor shaft (131) is provided with a first installation groove (1311), and the magnetic steel sleeve (140) is embedded in the first installation groove (1311).

3. The drive motor according to claim 2, characterized in that: An exhaust hole (142) is provided on the magnetic steel sleeve (140) and penetrates along the axial direction of the rotor shaft (131).

4. The drive motor according to claim 3, characterized in that: The encoder magnetic steel (150) is fixedly installed in the magnetic steel installation groove (141) by interference fit.

5. The driving motor according to claim 1, characterized in that: The magnetic steel sleeve (140) is made of non-magnetic conductive material.

6. The driving motor according to claim 1, characterized in that: An encoder bracket (170) is fixedly mounted on the rear end cover (113), and the encoder chip (160) is fixedly connected to the rear end cover (113) via the encoder bracket (170).

7. The driving motor according to claim 1, characterized in that: Also includes: A housing (110), wherein the rear end cover (113) is buckled onto the housing (110); A heat dissipation fan (200) is arranged on a side wall of the housing (110); A plurality of heat dissipation ribs are provided on the surface of the housing (110), and the heat dissipation fan (200) is mounted on the heat dissipation ribs.

8. The driving motor according to claim 7, characterized in that: The housing (110) has a first heat dissipation area (180) and a second heat dissipation area (190), the first heat dissipation area (180) and the second heat dissipation area (190) are both provided with the heat dissipation ribs, and the heat dissipation fan (200) is arranged in the first heat dissipation area (180) or the second heat dissipation area (190).

9. The driving motor according to claim 7, characterized in that: The height of the heat dissipation ribs is a, the distance between adjacent heat dissipation ribs is b, and the ratio of the height of the heat dissipation ribs to the distance between the heat dissipation ribs is 1<a / b<1.

5.

10. The driving motor according to claim 8, characterized in that: The number of heat dissipation ribs in the first heat dissipation area (180) and the second heat dissipation area (190) is 7-10.

11. A fitness equipment, characterized in that: A drive motor according to any one of claims 1 to 10.

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