CN214388689U

CN214388689U - Loading motor of force instrument and force instrument

Info

Publication number: CN214388689U
Application number: CN202022086733.5U
Authority: CN
Inventors: 张江鹏
Original assignee: Guangzhou Yuandong Smart Sports Technology Co Ltd
Current assignee: Guangzhou Yuandong Smart Sports Technology Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-10-15
Anticipated expiration: 2030-09-21
Also published as: WO2022057885A1

Abstract

The utility model relates to a loading motor of a strength instrument, which comprises a stator component; the stator assembly is annular, the inner diameter of the stator assembly is D1, the outer diameter of the stator assembly is D2, and D1/D2 are more than or equal to 0.6 and less than or equal to 0.8; the thickness of the stator assembly is L, and L/D2 is more than or equal to 0.2 and less than or equal to 0.5. The utility model discloses a strength apparatus loading motor, the fracture of increase motor is than the flat ratio that reduces the motor simultaneously to reduced the volume of stator, be favorable to increasing torque density, made the output torque of strength apparatus more steady.

Description

Loading motor of force instrument and force instrument

Technical Field

The utility model belongs to the motor field, concretely relates to strength apparatus loading motor and strength apparatus.

Background

Along with the development of economic society and the improvement of living standard of people, people pay more and more attention to physical health, and fitness equipment is more and more widely applied to daily life of people. Exercise equipment has had many new developments in exercise devices, such as the use of motors to control the devices. At present, a motor is used as a resistance load force instrument, a standard servo motor and a speed reducer are adopted, but the pull range of the existing motor load type force instrument is smaller.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the shortcoming among the prior art is overcome to aim at and not enough, provides a strength apparatus loading motor, and the fracture of increase motor is compared the flat ratio that reduces the motor simultaneously, has reduced the volume of stator, is favorable to increasing torque density, reduces the tooth's socket effect, can increase the pulling force scope of strength apparatus, and makes motor output torque more steady.

The embodiment of the utility model provides a realize through following technical scheme: a force instrument loading motor comprising a stator assembly; the stator assembly is annular, the inner diameter of the stator assembly is D1, the outer diameter of the stator assembly is D2, and D1/D2 are more than or equal to 0.6 and less than or equal to 0.8; the thickness of the stator assembly is L, and L/D2 is more than or equal to 0.2 and less than or equal to 0.5.

The utility model discloses technical scheme reduces the flat ratio of motor simultaneously through the split ratio of increase motor, has reduced the volume of stator, and torque density is positive correlation with the internal diameter of stator, and the increase of internal diameter and external diameter ratio is favorable to increasing torque density, realizes exporting big torque under small-size, can increase the pulling force scope of strength apparatus.

Further, power apparatus loading motor still includes the rotor subassembly, the rotor subassembly is cylindricly, stator module around set up in the outside of rotor subassembly, the air gap between stator module and the rotor subassembly is 0.5-0.6 mm. The specific limitation of the air gap between the stator assembly and the rotor assembly enables the rotor assembly to be increased along with the increase of the ratio of the inner diameter to the outer diameter of the motor, and the design of the number of the multiple magnetic poles and the multiple grooves of the motor is facilitated, so that the tooth space positioning force of the motor is reduced, the tooth space effect is weakened, and the output torque of the motor is smoother.

Further, strength apparatus loading motor still includes shell and reduction gear, stator module is located the shell is inboard and with the shell is fixed, the reduction gear is located in the shell, and with the rotor subassembly is fixed. Through setting up the reduction gear in the shell for the reduction gear with stator module and rotor subassembly sharing shell, above-mentioned structure not only is favorable to strengthening the axiality of motor, makes motor output torque more smooth-going, reduces usage space moreover, compact structure.

Further, the speed reducer is a single-stage planetary speed reducer which comprises a sun gear and an inner gear ring, wherein the sun gear is fixedly connected with an output shaft of the motor, and the inner gear ring is fixedly connected with the shell. The structure is a specific implementation mode that the speed reducer is arranged in the shell, and is used for enabling the coaxiality of the motor to be stronger and the structure to be more compact.

Furthermore, the single-stage planetary reducer also comprises a planet wheel, the planet wheel is a plastic part, the sun wheel and the inner gear ring are both metal parts, and the planet wheel is positioned between the sun wheel and the inner gear ring, so that the special selection of the materials is favorable for reducing friction and noise.

Further, the shell further comprises heat dissipation fins, and the heat dissipation fins are located at positions corresponding to the stator assembly. The heat dissipation fins are used for dissipating heat.

The embodiment of the utility model provides a still provide a strength apparatus, including above-mentioned strength apparatus loading motor.

In the power apparatus provided by the embodiment of the utility model, the loading motor of the power apparatus increases the splitting ratio and reduces the flattening ratio, so that the output torque is stable, the torque density is increased, and the tension range of the power apparatus is enlarged; meanwhile, the volume of the loading motor of the force instrument is reduced, so that the placement space required by the force instrument is reduced.

And one end of the flexible connecting piece is wound and fixed on the output shaft of the motor, and the other end of the flexible connecting piece is fixed with the handle. The handle is used for applying pulling force to the flexible connecting piece through the handle, and resistance provided by the motor is overcome to do work, so that the effect of body building is achieved.

The utility model also provides a force apparatus, which comprises the force apparatus loading motor; the motor is characterized by further comprising a flexible connecting piece and a handle, wherein one end of the flexible connecting piece is wound and fixed on a shaft output shaft of the motor, and the other end of the flexible connecting piece is fixed with the handle; the power instrument loading motor comprises a rear end cover and a photoelectric encoder; the photoelectric encoder comprises a detection part and a receiving part, wherein the detection part is arranged on the rotor assembly and used for detecting the position and the rotating speed of the rotor assembly, and the receiving part is arranged on the rear end cover and used for receiving the detection data of the detection part and transmitting the detection data to the driver to regulate and control the force instrument loading motor. The structure is a specific implementation mode of the force instrument, and is beneficial to detecting the working condition of the rotor assembly in real time, so that the external driver can timely regulate and control the loading motor of the force instrument.

For a better understanding and practice, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the internal structure of a force instrument loading motor.

Fig. 2 is a schematic view of the stator structure of the force instrument loading motor.

Fig. 3 is a view in the direction B-B of fig. 2.

Fig. 4 is an external structural view of the power instrument loading motor.

Fig. 5 is a schematic structural view of the power instrument.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad embodiments of the invention. It should be further noted that, for convenience of description, only some structures, but not all structures, related to the embodiments of the present invention are shown in the drawings.

Furthermore, the terms first, second, third and the like in the description and in the claims, are used for descriptive purposes only to distinguish one element from another, and are not to be construed as indicating or implying relative importance or implying any order or order to the indicated elements. The terms are interchangeable where appropriate. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Similarly, the term "coupled", as used in the description and in the claims, should not be construed as limited to direct coupling. Thus, the expression "device a is connected to device B" should not be limited to devices or systems in which device a is directly connected to device B, meaning that there is a path between device a and device B, which may be a path including other devices or tools.

The embodiment of the utility model provides a through the split ratio and the flat ratio of increase motor to the moment density and the inertia of increase motor make the output torque of motor more smooth-going, reduction gear and stator module, rotor subassembly sharing shell make motor compact structure. The following examples are intended to illustrate the details.

Example 1

The embodiment 1 provides a force instrument loading motor, which includes a stator assembly, wherein the stator assembly is annular, the inner diameter of the stator assembly is D1, the outer diameter of the stator assembly is D2, and D1/D2 is not less than 0.8 and is not less than 0.6; the thickness of the stator assembly is L, and L/D2 is more than or equal to 0.2 and less than or equal to 0.5.

As shown in fig. 1, 2 and 3, the ratio D1/D2 of the stator inner diameter D1 to the stator outer diameter D2 is the split ratio of the motor, and the ratio L/D2 of the stator assembly thickness L to the stator outer diameter D2 is the flat ratio of the motor, wherein the thickness L of the stator assembly specifies the distance between the upper surface and the lower surface of the subassembly.

In a certain space, for example, in a use scene with a smaller size, in order to meet the design of increasing the split ratio, the split ratio can be increased by increasing the inner diameter D1 of the stator by keeping the outer diameter D2 of the stator unchanged, and the volume of the stator assembly is reduced, so that when the force instrument loading motor is applied to the force instrument, the volume reduction of the stator assembly is beneficial to reducing the space required for placing the force instrument. Because the rotational inertia and the inner diameter of the stator are in positive correlation, the increase of the inner diameter of the stator is beneficial to increasing the rotational inertia, so that the output torque of the motor is more stable; in addition, the inner diameter of the stator is increased, the design of the number of the multiple slots of the motor can be met, and more slots for placing wires are arranged. In addition, in a certain space, for example, in an application scenario with a smaller size, in order to meet the design of reducing the flat ratio, it is generally possible to reduce the flat ratio and reduce the volume of the stator assembly by reducing the thickness L of the stator assembly 2 and keeping the stator outer diameter D2 unchanged. The reduced size of the stator assembly facilitates reducing the space required for placement of the power tool.

In a preferred embodiment, the motor split ratio D1/D2 is 0.7, and L/D2 is 0.3, so that the size of the stator volume is optimized, the tension range of the force instrument is effectively increased, and the stability of the output torque is optimized.

In one embodiment, the power instrument load motor may further include a rotor assembly 3, a housing 1, and a reducer. As shown in fig. 1, 2 and 3, the rotor assembly 3 has a cylindrical shape, and the stator assembly 2 is disposed around the rotor assembly 3. The rotor assembly 3 rotates to cut the magnetic induction lines when the stator assembly 2 is energized to generate a magnetic field. The air gap between the stator assembly 2 and the rotor assembly 3 is 0.5-0.6 mm. The particular definition of the air gap between the stator assembly 2 and the rotor assembly 3 is such that the rotor assembly 3 increases as the ratio of the inner diameter to the outer diameter of the machine increases. In one embodiment, when the stator outer diameter D2 is unchanged and the stator inner diameter D1 is increased to increase the split ratio of the motor, the diameter of the rotor assembly 3 in the stator assembly 2 can be correspondingly increased until the air gap between the stator assembly 2 and the rotor assembly 3 is 0.5-0.6mm, and as the diameter of the rotor assembly 3 is increased, the magnetic flux is in positive correlation with the torque density, and the increase of the magnetic flux is beneficial to increase of the torque density; meanwhile, the rotor assembly 3 is increased along with the increase of the inner diameter of the stator, and the design of a plurality of magnetic poles can be met, so that the tooth space positioning force of the motor is reduced, the tooth space effect is weakened, and the output torque of the motor is further smoother.

As shown in fig. 1 and 4, the housing 1 may further include a front end cover 12, a rear end cover 14, and a casing, where the front end cover 12 and the rear end cover 14 are detachably connected to the casing, respectively, to form an accommodating space. Stator module 2 and rotor subassembly 3 all locate the accommodation space, stator module 2 is located shell 1 inboard and fixed with shell 1. The power instrument loading motor further comprises an output shaft 6, and the front end cover 12 and the rear end cover 14 are provided with holes so that the output shaft 6 of the motor can penetrate through the holes.

As shown in fig. 1, as a preferred embodiment, the speed reducer is disposed in the housing 1 and directly connected to the rotor assembly 3, which is beneficial to enhance the coaxiality of the motor and stabilize the output torque of the motor. Through setting up the reduction gear in shell 1 for the reduction gear with stator module 2, rotor subassembly 3 sharing motor's shell 1, be favorable to making the motor compacter, reduce the usage space. Preferably, the speed reducer is a single-stage planetary speed reducer 4, the single-stage planetary speed reducer 4 comprises a sun gear (not shown), a planet gear (not shown) and an inner gear ring 42, the sun gear is fixed with the output shaft 6 of the motor so as to be integrated, and the inner gear ring 42 is fixedly connected with the shell 1. Preferably, the sun gear and the ring gear 42 are metal members, and the planet gears are plastic members, so as to reduce system friction and reduce noise. If the sun wheel and the inner gear ring are both plastic parts, the mechanical strength of the sun wheel and the inner gear ring is insufficient, and the transmission of power cannot be completed.

As shown in fig. 4, the housing 1 may further include a heat dissipation rib 16, the heat dissipation rib 16 is located at a position corresponding to the housing of the stator assembly, and the heat dissipation rib 16 is used to enhance the heat dissipation effect of the force instrument loading motor.

The force instrument loading motor provided by the embodiment of the utility model increases the motor splitting ratio and reduces the motor flattening ratio, thus reducing the volume of the stator assembly, being beneficial to improving the torque density of the motor, increasing the rotational inertia of the rotor assembly and making the operation more stable; in a further technical scheme, the speed reducer, the stator assembly and the rotor assembly share the shell and are fixed with the output shaft, coaxiality is enhanced, operation is stable, and the motor is compact in structure.

This embodiment 1 also provides a power tool including the power tool loading motor described above. In a preferred embodiment, the power instrument loading motor further comprises a flexible connecting member 73 and a handle 74, wherein one end of the flexible connecting member 73 is wound and fixed on the output shaft of the power instrument loading motor, and the other end is fixed with the handle 74.

In a specific embodiment, the force instrument may further comprise a driver (not shown) for driving and regulating the force instrument loading motor. As shown in fig. 1, the power instrument loading motor may further include a photoelectric encoder, the photoelectric encoder includes a detection portion and a receiving portion 54, the detection portion is disposed on the rotor assembly 3 and is used for detecting the position and the rotation speed of the rotor assembly 3, and the receiving portion 54 is disposed on the rear end cap 14 and is used for receiving the detection data of the detection portion and transmitting the detection data to the driver to regulate the power instrument loading motor. The structure is a specific implementation mode of the force instrument, and is beneficial to detecting the working condition of the rotor assembly in real time, so that the driver can timely regulate and control the loading motor of the force instrument.

In one specific embodiment, as shown in fig. 5, the power tool further includes a pedal 71 and a case 72. The pedal 71 is used for a user to step on during exercise, and a plurality of supporting columns 711 are arranged at the lower part of the pedal 71 and used for supporting the pedal 71. The force instrument may be provided with two cases 72 and two force instrument loading motors. The loading motor of the strength instrument is arranged in the box bodies 72, and the two box bodies 72 are respectively fixedly connected with the pedal 71 and are provided with through holes. The power instrument may comprise two flexible connectors 73, the flexible connectors 73 being in particular pull cords, and the handle 74 being in particular a pull ring for a user to apply a pulling force to the pull cords through the pull ring, the pull cords passing through the case 72 and being wound around the power instrument load motor. When the strength apparatus provided by the embodiment of the utility model is used, a user applies pulling force to the pull rope through the pull ring and drives the output shaft of the motor to rotate, so as to achieve the effect of exercise; when the pulling force is removed, the force instrument loads the output torque of the motor to pull the pull rope to reset.

The utility model discloses above-mentioned strength apparatus loading motor has been applied to strength apparatus, and this motor increase motor splits and compares and reduces flat ratio, is favorable to increasing torque density and inertia, makes output torque smooth-going, makes the torque output of strength apparatus is steady and the pulling force scope is big.

Embodiments of the present invention are not limited to the above-described embodiments, and if various modifications or variations to the embodiments of the present invention do not depart from the spirit and scope of the embodiments of the present invention, if these modifications and variations fall within the scope of the claims and equivalent technical scope of the embodiments of the present invention, then the embodiments of the present invention are also intended to include these modifications and variations.

Claims

1. A force instrument loading motor, characterized by:

the stator assembly is annular, the inner diameter of the stator assembly is D1, the outer diameter of the stator assembly is D2, and D1/D2 is more than or equal to 0.6 and less than or equal to 0.8; the thickness of the stator assembly is L, and L/D2 is more than or equal to 0.2 and less than or equal to 0.5.

2. The power instrument load motor of claim 1, wherein:

the wind power generator further comprises a rotor assembly, wherein the rotor assembly is cylindrical, the stator assembly is arranged on the outer side of the rotor assembly in a surrounding mode, and an air gap between the stator assembly and the rotor assembly is 0.5-0.6 mm.

3. The power instrument load motor of claim 2, wherein:

the device also comprises a shell and a speed reducer; the stator assembly is positioned inside the shell and fixed with the shell; the speed reducer is arranged in the shell and is fixed with the rotor component.

4. The power instrument load motor of claim 3, wherein:

the speed reducer is a single-stage planetary speed reducer which comprises a sun gear and an inner gear ring, wherein the sun gear is fixedly connected with an output shaft of the motor, and the inner gear ring is fixedly connected with the shell.

5. The power instrument load motor of claim 4, wherein:

the single-stage planetary reducer further comprises a planetary wheel which is a plastic part, and the sun wheel and the inner gear ring are both metal parts.

6. The power instrument load motor of claim 3, wherein:

the shell further comprises heat dissipation fins, and the heat dissipation fins are located at positions corresponding to the stator assembly.

7. A force instrument, characterized by: comprising a force instrument loading motor according to any one of claims 1 to 6.

8. The power instrument of claim 7, wherein:

still include flexible connectors and handle, flexible connectors one end winding is fixed in on the axle of the axle play of motor, the other end with the handle is fixed.

9. A force instrument, characterized by:

comprising a power device loading motor according to any one of claims 2-6;

the motor is characterized by further comprising a flexible connecting piece and a handle, wherein one end of the flexible connecting piece is wound and fixed on a shaft output shaft of the motor, and the other end of the flexible connecting piece is fixed with the handle;

the motor comprises a rear end cover and a photoelectric encoder; the photoelectric encoder comprises a detection part and a receiving part, wherein the detection part is arranged on the rotor assembly and used for detecting the position and the rotating speed of the motor rotor, and the receiving part is arranged on the rear end cover and used for receiving the detection data of the detection part and transmitting the detection data to the driver for regulating and controlling the motor.