CN214255991U - Treadmill is fallen and is fallen electromagnetism optimized structure for making an uproar - Google Patents

Abstract

The utility model relates to an electromagnetic optimization structure for noise reduction of a treadmill, which comprises a motor, a low-pass filter circuit connected with the motor and a physical noise reduction structure for reducing noise of the motor; the low-pass filter circuit performs low-pass filtering on the pulse width modulation signal to reduce the pulse component applied to the motor coil, so that the electromagnetic noise of the motor is reduced; the structure of making an uproar falls in physics is including locating the motor cabin outside the motor and being used for the radiating initiative heat radiation structure of motor, sound-proof material has been laid to the motor under-deck wall, the utility model discloses when reducing motor electromagnetic noise to the noise that sends the motor carries out physics completely cuts off, and guarantees its good heat dissipation, makes the noise that exposes when the motor operation little and can steady operation.

Description

Treadmill is fallen and is fallen electromagnetism optimized structure for making an uproar

Technical Field

The utility model relates to a treadmill technical field, concretely relates to treadmill is fallen and is fallen with electromagnetism and optimize structure.

Background

The electric running machine drives the running belt through the motor to enable a person to passively run or walk at different speeds or slopes to experience different running environments, and is a systemic exercise mode. Because the exercise mode has almost no pedaling and stretching actions, the exercise intensity can be reduced compared with the land, the exercise amount can be improved, and the distance of 1/3 is increased compared with the land, so that the exercise device has very good effects on improving the cardio-pulmonary function, the muscle endurance and the weight reduction of a user. Therefore, the treadmill is also popular with the majority of fitness enthusiasts, and is a better aerobic exercise mode.

At present, the motor of the existing treadmill usually has a motor torque ripple phenomenon, which causes the noise of the motor to increase, and therefore an electromagnetic optimization structure capable of significantly reducing the motor noise caused by the motor torque ripple is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a treadmill is fallen and is fallen with electromagnetism and optimize structure to the above-mentioned problem that exists among the prior art.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: an electromagnetic optimization structure for noise reduction of a treadmill comprises a motor, a low-pass filter circuit connected with the motor and a physical noise reduction structure for reducing noise of the motor; the low-pass filter circuit performs low-pass filtering on the pulse width modulation signal to reduce the pulse component applied to the motor coil, so that the electromagnetic noise of the motor is reduced; the physical noise reduction structure comprises a motor cabin arranged outside the motor and an active heat dissipation structure used for dissipating heat of the motor, and sound insulation materials are laid on the inner wall of the motor cabin.

The working principle and the beneficial effects are as follows: 1. the pulse width modulation signal is subjected to low-pass filtering through a low-pass filtering circuit, so that the pulse component applied to a motor coil is reduced, and the electromagnetic noise of the motor is reduced;

2. the noise emitted outwards when the motor runs is reduced in a physical isolation mode, and the motor is refrigerated and radiated through the active radiating structure, so that the normal running of the motor is ensured;

3. compare independent electromagnetism optimization or the mode that physics was syllable-dividing, the effect of this scheme is better.

Furthermore, the active heat dissipation structure comprises a semiconductor refrigeration sheet arranged outside the motor cabin, a heat pipe which is respectively contacted with the semiconductor refrigeration sheet and the motor shell to realize heat exchange, and a temperature sensor arranged on the motor shell. This setting, through the cold side refrigeration of semiconductor refrigeration piece, compare compressor and the little and almost no extra noise of traditional forced air cooling's equipment occupation space, can cool down motor housing fast effectively, guarantee the normal operating of motor.

Furthermore, the low-pass filter circuit comprises a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor, one end of the first resistor is connected with the first capacitor, the other end of the first resistor is respectively connected with the second capacitor and the second resistor, the other end of the second resistor is connected with the third capacitor, and the first capacitor, the second capacitor and the third capacitor are all grounded. The three-order passive low-pass filter circuit generated by the circuit structure has a simple structure, and can remarkably reduce the pulse component of the pulse width modulation signal added on the motor coil, thereby reducing the electromagnetic noise of the motor.

Further, the motor cabin and the shell of the motor are both made of aluminum alloy. This setting is compared pure copper's material, and is lighter with the volume quality, more is fit for being used for the treadmill, and the radiating effect is good, and material cost is low.

Furthermore, heat-conducting silicone grease is arranged between the semiconductor refrigeration sheet and the outer surface of the motor cabin. Fill the small clearance between semiconductor refrigeration piece and the motor cabin surface through heat conduction silicone grease to promote heat exchange area, promote the heat exchange effect, some heat conduction silicone grease can also play certain fixed effect simultaneously, makes things convenient for the installation of semiconductor refrigeration piece.

Further, the sound insulation material is composite sound insulation cotton, and the composite sound insulation cotton is bonded with the inner wall of the motor cabin. Preferably, the high-resilience wave crest sound absorption cotton is commercially available and is formed by compounding polyurethane sponge material and NBR nitrile rubber heat insulation cotton. The sound-deadening, sound-absorbing, sound-insulating and shock-absorbing material is formed by special treatment of equipment and foaming through a complex process, wherein one surface of the material is in a concave-convex wave shape. The interior of the sound wave attenuation device is filled with tiny gaps and a half-open hole structure, so that a large amount of incident sound wave energy can be absorbed to attenuate sound waves, and interference and reverberation of internal reflected sound are reduced.

Furthermore, a heat radiating fin is arranged between the shell of the motor and the inner wall of the motor cabin, and at least part of the heat pipe penetrates through the heat radiating fin. The heat exchange area of the motor shell can be increased through the radiating fins, so that the motor shell can better exchange heat with the heat pipe, and the heat exchange fins can be directly sleeved outside the existing motor and then matched with the heat pipe, so that the motor shell is convenient to assemble.

Furthermore, latticed reinforcing ribs are arranged on the inner wall of the motor cabin, and the sound insulation material fills each grid and covers the reinforcing ribs. This setting can show the mechanical strength who strengthens the motor cabin, can make things convenient for sound insulation material's installation simultaneously for sound insulation material's thickness can be guaranteed, thereby guarantee its syllable-dividing effect.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention;

fig. 2 is a schematic view of an embodiment of the heat dissipation fin of the present invention;

fig. 3 is a schematic diagram of an embodiment of the low-pass filter circuit of the present invention.

In the figure, 1, a motor cabin; 2. a motor; 3. a heat dissipating fin; 4. a housing; 5. a sound insulating material; 6. reinforcing ribs; 7. a semiconductor refrigeration sheet; 8. a heat pipe; 9. a temperature sensor; 10. a pulley.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting.

As shown in fig. 1, this treadmill is fallen and is fallen with electromagnetism optimized structure includes motor 2, still includes the low pass filter circuit who is connected with motor 2 and is used for falling the physics of making an uproar and fall the structure of making an uproar to motor 2, and in this embodiment, motor 2 is the motor 2 of the drive race platform for current common treadmill, and it runs the platform through common band pulley 10 or gear connection, and concrete structure is prior art, and it is no longer repeated here.

Preferably, the motor compartment 1 and the housing 4 of the motor 2 are both made of aluminum alloy. This setting is compared pure copper's material, and is lighter with the volume quality, more is fit for being used for the treadmill, and the radiating effect is good, and material cost is low.

Referring to fig. 3, specifically, the low pass filter circuit performs low pass filtering on the pulse width modulation signal to reduce the ripple component applied to the coil of the motor 2, so as to reduce the electromagnetic noise of the motor 2, the low pass filter circuit includes a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, and a third capacitor C3, one end of the first resistor R1 is connected to the first capacitor C1, the other end of the first resistor R1 is connected to the second capacitor C2 and the second resistor R2, the other end of the second resistor R2 is connected to the third capacitor C3, and the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all grounded. The circuit structure generates a three-order passive low-pass filter circuit and is simple in structure.

In the electromagnetic optimization circuit, it is further explained that the input terminal In passes through the low-pass filter composed of the first resistor R1 and the first capacitor C1, the high frequency is bypassed to the ground by the first capacitor C1, the low frequency is passed by the first resistor R1, the low-pass filter composed of the first resistor R1, the second resistor R2 and the second capacitor C2, the high frequency is bypassed to the ground by the second capacitor C2, the low frequency is passed by the second resistor R2, the low-pass filter composed of the second resistor R2 and the third capacitor C3, the high frequency is bypassed to the ground by the third capacitor C3, and the low frequency is passed by the second resistor R2 and output through the output terminal Out. The time constant is determined by the capacities of the first capacitor C1, the second capacitor C2 and the third capacitor C3 and the resistances of the first resistor R1 and the second resistor R2, wherein the larger the capacity of the capacitor is, the larger the resistance of the resistor is, the longer the time constant is, and the lower the passing frequency is.

Specifically, the structure of making an uproar falls in physics is including locating motor 2 outer motor cabin 1 and being used for the radiating initiative heat radiation structure of motor 2, sound-proof material 5 has been laid to motor cabin 1 inner wall, wherein sound-proof material 5 is compound soundproof cotton, just compound soundproof cotton bonds with 1 inner wall in motor cabin. Preferably, the high-resilience wave crest sound absorption cotton is commercially available and is formed by compounding polyurethane sponge material and NBR nitrile rubber heat insulation cotton. The sound-deadening, sound-absorbing, sound-insulating and shock-absorbing material is formed by special treatment of equipment and foaming through a complex process, wherein one surface of the material is in a concave-convex wave shape. The interior of the sound wave attenuation device is filled with tiny gaps and a half-open hole structure, so that a large amount of incident sound wave energy can be absorbed to attenuate sound waves, and interference and reverberation of internal reflected sound are reduced.

Specifically, the active heat dissipation structure comprises a semiconductor refrigeration piece 7 arranged outside the motor cabin 1, a heat pipe 8 which is respectively in contact with the semiconductor refrigeration piece 7 and the motor 2 shell 4 to realize heat exchange, and a temperature sensor 9 arranged on the motor 2 shell 4. This setting, through the cold side refrigeration of semiconductor refrigeration piece 7, compare compressor and the equipment occupation space of traditional forced air cooling little and almost no extra noise, can cool down motor 2 shell 4 fast effectively, guarantee motor 2's normal operating. The semiconductor refrigeration piece 7 is attached to the outside of the motor cabin 1 in this embodiment, and the shape of the motor cabin 1 may be a cube according to actual requirements. The temperature of the motor 22 is detected by the temperature sensor 911, when the temperature of the motor 22 is higher than a set value, the semiconductor chilling plate 79 is opened to actively dissipate heat, and when the temperature of electricity is lower than the set value, the semiconductor chilling plate 79 is closed, so that the energy-saving effect is achieved. The whole control process is controlled by the control panel of the treadmill, and the detailed description is omitted here.

Specifically, heat-conducting silicone grease is arranged between the semiconductor refrigerating sheet 7 and the outer surface of the motor cabin 1. Fill the small clearance between semiconductor refrigeration piece 7 and the 1 surface in motor cabin through heat conduction silicone grease to promote heat exchange area, promote the heat exchange effect, some heat conduction silicone grease can also play certain fixed effect simultaneously, makes things convenient for the installation of semiconductor refrigeration piece 7. The heat-conducting silicone grease is 7921 or MX-4, and can be other heat-conducting silicone gels.

Referring to fig. 2, preferably, a heat dissipation fin 3 is further disposed between the housing 4 of the motor 2 and the inner wall of the motor compartment 1, and the heat pipe 8 at least partially penetrates through the heat dissipation fin 3. Can increase the heat transfer area of motor 2 shell 4 through this radiating fin 3, make it carry out the heat exchange with heat pipe 8 better, can directly overlap outside current motor 2 through radiating fin 3 moreover, again with the heat pipe 8 cooperation can, convenient assembling.

Preferably, grid-shaped reinforcing ribs 6 are arranged on the inner wall of the motor compartment 1, and the sound insulation material 5 fills each grid and covers the reinforcing ribs 6. This setting can show the mechanical strength who strengthens motor cabin 1, can make things convenient for sound barrier material 5's installation simultaneously for sound barrier material 5's thickness can be guaranteed, thereby guarantees its syllable-dividing effect.

The part of the utility model which is not described in detail is the prior art, so the utility model does not detail the part.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Although the terms motor compartment 1, motor 2, heat dissipating fins 3, housing 4, sound insulating material 5, reinforcing ribs 6, semiconductor cooling fins 7, heat pipe 8, temperature sensor 9, pulley 10, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims (8)

1. An electromagnetic optimization structure for noise reduction of a treadmill comprises a motor, and is characterized by further comprising a low-pass filter circuit connected with the motor and a physical noise reduction structure for reducing noise of the motor; the low-pass filter circuit performs low-pass filtering on the pulse width modulation signal to reduce the pulse component applied to the motor coil, so that the electromagnetic noise of the motor is reduced; the physical noise reduction structure comprises a motor cabin arranged outside the motor and an active heat dissipation structure used for dissipating heat of the motor, and sound insulation materials are laid on the inner wall of the motor cabin.

2. The electromagnetic optimization structure for noise reduction of the treadmill of claim 1, wherein the active heat dissipation structure comprises a semiconductor refrigeration piece disposed outside the motor compartment, a heat pipe contacting the semiconductor refrigeration piece and the motor housing respectively to realize heat exchange, and a temperature sensor disposed on the motor housing.

3. The electromagnetic optimization structure for noise reduction of a treadmill of claim 1, wherein the low pass filter circuit comprises a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor, the first resistor is connected to the first capacitor at one end, the second capacitor and the second resistor are connected to the other end, the second resistor is connected to the third capacitor at the other end, and the first capacitor, the second capacitor and the third capacitor are all grounded.

4. The electromagnetic optimization structure for noise reduction of treadmill of claim 1, wherein the motor compartment and the housing of the motor are made of aluminum alloy.

5. The electromagnetic optimization structure for noise reduction of the treadmill of claim 2, wherein a heat conductive silicone grease is disposed between the semiconductor refrigeration sheet and the outer surface of the motor compartment.

6. The electromagnetic optimization structure for noise reduction of treadmill of claim 1, wherein the sound insulation material is composite sound insulation cotton, and the composite sound insulation cotton is bonded with the inner wall of motor compartment.

7. The electromagnetic optimization structure for noise reduction of the treadmill of claim 2, wherein a heat dissipation fin is further disposed between the housing of the motor and the inner wall of the motor compartment, and the heat pipe is at least partially disposed through the heat dissipation fin.

8. The electromagnetic optimizing structure for noise reduction of treadmill according to any one of claims 1 to 7, wherein the inner wall of motor compartment is provided with grid-shaped reinforcing ribs, and the sound insulation material fills each grid and covers the reinforcing ribs.

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