CN214255978U - Wind path optimization structure for treadmill motor - Google Patents

Abstract

The utility model relates to an air path optimization structure for a treadmill motor, which comprises a motor cabin, a motor arranged in the motor cabin and a fan blade arranged on a motor shaft of the motor, wherein a 3-5mm gap is arranged between the fan blade and the motor; sound insulation material has been laid to the motor compartment inner wall, the utility model discloses improve the distance between original fan blade and the motor from 2mm to 3-5mm, can show the noise that reduces the wind shear and produce, and through the sound insulation material in motor compartment, can further block the noise that fan blade and motor operation produced in the motor compartment.

Description

Wind path optimization structure for treadmill motor

Technical Field

The utility model relates to a treadmill field, concretely relates to wind path optimization structure for treadmill motor.

Background

The treadmill is a commonly-used apparatus for families and gymnasiums, is the simplest one of family fitness apparatuses, and is the best choice of the family fitness apparatus.

Present intelligent treadmill is because its electrical equipment is more and the structure is comparatively complicated, consequently need set up special heat radiation structure and come to dispel the heat to inside motor etc. for example current treadmill is used for passing the direct current brushless motor of drive race board, can set up the fan blade on the motor shaft usually, it is rotatory to carry out the radiating operation to motor itself to drive the fan blade in driving motor, but can produce great wind shear high frequency noise when high rotational speed motor drives the fan blade and rotates, consequently, need to design a structure that can show the noise that produces when reducing the motor and rotate the heat dissipation urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an air path optimization structure for treadmill motor 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 air path optimization structure for a treadmill motor comprises a motor cabin, a motor arranged in the motor cabin and a fan blade arranged on a motor shaft of the motor, wherein a gap of 3-5mm is formed between the fan blade and 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 gap between the current fan blade and the motor is too small, mostly 1-2mm, when the motor runs at high speed, the rotating speed of the fan blade is high, the wind speed in the gap is high, and the noise generated by wind shear is large, the scheme reduces the wind speed in the gap by increasing the gap between the fan blade and the motor to 3-5mm, so that the wind energy blowing to the motor can be better blown to other parts of the shell of the motor, and the noise generated by the wind shear is reduced;

2. the motor cabin is reinforced in a sound insulation mode through the sound insulation material, and therefore noise transmitted from the inside of the motor cabin is remarkably reduced.

Further, the gap is 4 mm. Through many times of experiments, adjust original fan blade and motor housing's interval to 4mm from 2mm, the wind shear noise that produces when the fan blade rotates is showing and is reducing, and 4 mm's distance is just suitable, though can play better noise reduction effect a little more than 4mm, but can cause the inside structure occupation space grow of treadmill, causes the cost to rise, must not repay, consequently chooses for use 4mm as the best.

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. The mechanical strength of the motor cabin is strengthened through the reinforcing ribs, and meanwhile, the installation of filling materials can be facilitated.

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.

Further, the shell of the motor is sleeved with annular radiating fins, and the radiating fins are consistent with the shell of the motor in length and are abutted to the sound insulation material. The arrangement can increase the heat exchange area of the motor shell, thereby ensuring the heat dissipation capacity of the motor.

Furthermore, a plurality of through holes for ventilation are respectively formed in the front end and the rear end of the motor cabin, and the motor cabin is made of aluminum alloy. This setting can make things convenient for the ventilation of fan blade, and the motor cabin can carry out the supplementary heat dissipation of certain degree to can play certain filtration effect through sound-proof material, prevent inside the entering motor of cockroaches etc..

The motor is characterized by further comprising a noise reduction circuit for performing electromagnetic optimization on the motor, wherein the noise reduction circuit is a low-pass filter circuit composed of 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 connected with the second capacitor and the second resistor respectively, 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. According to the arrangement, the low-pass filter circuit is formed by the circuit, and the pulse width modulation signals in the treadmill circuit are subjected to low-pass filtering, so that the pulsation component added on the coil is reduced, the electromagnetic noise is reduced, and the comprehensive working condition noise of the treadmill can be reduced by about 5-8 decibels.

Furthermore, a semiconductor refrigeration piece is arranged outside the motor cabin and is in contact with the shell of the motor through a plurality of heat pipes to carry out heat exchange. This setting through initiative refrigeration, can further promote the radiating effect of motor, consequently can choose for use the material thicker sound-proof material that the effect is better that gives sound insulation, further promotes sound-proof effect, can guarantee the normal operating of motor again.

Furthermore, a temperature sensor is arranged on a shell of the motor, and the temperature of the shell of the motor is detected through the temperature sensor, so that the switch of the semiconductor refrigerating sheet is adjusted. According to the arrangement, the temperature of the motor is detected through the temperature sensor, when the temperature of the motor is higher than a set value, the semiconductor refrigerating sheet is opened to carry out active heat dissipation, and when the temperature of electricity is lower than the set value, the semiconductor refrigerating sheet is closed, so that an 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.

Furthermore, an electromagnetic clutch is arranged between the fan blade and the motor shaft, and the connection and the separation of the fan blade and the motor shaft are controlled through the electromagnetic clutch. This setting, just can the steady operation when the temperature of motor need not to dispel the heat, through electromagnetic clutch with the fan blade and motor shaft disconnection to make the fan blade not rotate, can eliminate fan blade pivoted noise completely, also can directly dispel the heat with the semiconductor refrigeration piece, only when full power heat dissipation, the fan blade just carries out the forced air cooling heat dissipation with the motor shaft linkage, noise control effectively, whole control flow is controlled through the control panel of treadmill itself, no longer gives unnecessary details to it here.

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 electromagnetic optimization circuit of the present invention;

fig. 4 is a schematic view of an embodiment of the reinforcing bar of the present invention.

In the figure, 1, a motor cabin; 2. a motor; 3. a fan blade; 4. a through hole; 5. a heat dissipating fin; 6. a housing; 7. a sound insulating material; 8. reinforcing ribs; 9. a semiconductor refrigeration sheet; 10. a heat pipe; 11. a temperature sensor; 12. an electromagnetic clutch; 13. 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, the wind path optimizing structure for the treadmill motor 2 includes a motor compartment 1, a motor 2 disposed in the motor compartment 1, and a fan blade 3 disposed on a shaft of the motor 2, wherein a gap of 4mm is formed between the fan blade 3 and the motor 2, a plurality of through holes 4 for ventilation are respectively formed at front and rear ends of the motor compartment 1, and the motor compartment 1 is made of aluminum alloy. This setting can make things convenient for the ventilation of fan blade 3, and motor cabin 1 can carry out the supplementary heat dissipation of certain degree to can play certain air filter effect through sound-proof material 7, prevent inside the entering motor 2 of cockroaches etc.. One end of the motor 2 far away from the fan blade 3 is provided with a belt wheel 13 or a gear connected with the running platform. Because the interval of former design fan blade 3 and motor housing 6 only has 2mm, can produce the shear noise when the air outlet of fan blade cut the electricity shell, after this distance increases, the distance that 3 blades of fan blade cut the air outlet of electricity shell increases, the noise that the wind shear produced this moment weakens, through practical test, increase to 4mm from 2mm when the interval of fan blade 3 and motor housing 6, the noise that the wind shear produced obviously weakens, through the actual measurement: the wind shear noise generated by the 2mm distance reaches 68dB (A) at full speed, and the wind shear noise generated by the increased distance of 4mm is reduced to 63dB (A) at full speed, so that the noise can be obviously reduced by matching with other noise reduction measures.

Referring to fig. 2, specifically, the outer casing 6 of the motor 2 is sleeved with an annular heat dissipation fin 5, and the length of the heat dissipation fin 5 is the same as that of the outer casing 6 of the motor 2 and abuts against the sound insulation material 7. With this arrangement, the heat exchange area of the casing 6 of the motor 2 can be increased, thereby ensuring the heat dissipation capability of the motor 2.

Referring to fig. 4, specifically, a sound insulation material 7 is laid on the inner wall of the motor compartment 1, grid-shaped reinforcing ribs 8 are arranged on the inner wall of the motor compartment 1, and the sound insulation material 7 fills each grid and covers the reinforcing ribs 8. The mechanical strength of the motor cabin 1 is strengthened by the reinforcing ribs 8, and meanwhile, the installation of filling materials can be facilitated.

Preferably, the sound insulation material 7 is composite sound insulation cotton, and the composite sound insulation cotton is bonded with the inner wall of the motor compartment 1. 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.

In a preferred embodiment, a semiconductor refrigeration piece 9 is arranged outside the motor cabin 1, and the semiconductor refrigeration piece 9 is in contact with the shell 6 of the motor 2 through a plurality of heat pipes 10 for heat exchange. This setting through initiative refrigeration, can further promote the radiating effect of motor 2, consequently can choose for use the material thicker sound-proof material 7 that the effect is better that gives sound insulation, further promotes sound-proof effect, can guarantee motor 2's normal operating again.

Specifically, a temperature sensor 11 is arranged on the shell 6 of the motor 2, and the temperature of the shell 6 of the motor 2 is detected through the temperature sensor, so that the switch of the semiconductor refrigeration sheet 9 is adjusted. According to the arrangement, the temperature of the motor 2 is detected through the temperature sensor 11, when the temperature of the motor 2 is higher than a set value, the semiconductor refrigerating sheet 9 is opened to actively dissipate heat, and when the temperature of electricity is lower than the set value, the semiconductor refrigerating sheet 9 is closed, so that an 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, an electromagnetic clutch 12 is arranged between the fan blade 3 and the motor 2 shaft, and the connection and the separation of the fan blade 3 and the motor 2 shaft are controlled through the electromagnetic clutch 12. This setting, just can the steady operation when the temperature of motor 2 need not the heat dissipation, break off fan blade 3 and motor 2 axle through electromagnetic clutch 12, thereby make fan blade 3 not rotate, can eliminate fan blade 3 pivoted noise completely, also can directly dispel the heat with semiconductor refrigeration piece 9, only when the full power heat dissipation, fan blade 3 just carries out the forced air cooling heat dissipation with the 2 axle linkages of motor, noise control effectively, whole control flow is controlled through the control panel of treadmill itself in area, here no longer gives unnecessary details to it.

Referring to fig. 3, In another preferred embodiment, the electromagnetic optimization noise reduction circuit for the motor 2 further includes a noise reduction circuit, the noise reduction circuit includes an input end In and an output end Out, a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, and a third capacitor C3 are disposed between the input end In and the output end Out, one end of the first resistor R1 is connected to the input end In, the other end of the first resistor R1 is connected to the second resistor R2, the other end of the second resistor R2 is connected to the output end In, one end of the first capacitor C1 is connected to the input end In, the other end of the first capacitor C2 is connected to a connection point between the first resistor R1 and the second resistor R2, the other end of the first capacitor C3 is connected to ground, and one end of the third capacitor C3 is connected to the output end In and the other end of the second capacitor C is grounded. According to the arrangement, the low-pass filter circuit is formed by the circuit, and the pulse width modulation signals in the treadmill circuit are subjected to low-pass filtering, so that the pulsation component added on the coil is reduced, the electromagnetic noise is reduced, and the comprehensive working condition noise of the treadmill can be reduced by about 5-8 decibels.

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.

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 of the motor compartment 1, the motor 2, the fan blades 3, the through holes 4, the heat radiating fins 5, the outer shell 6, the sound insulating material 7, the reinforcing ribs 8, the semiconductor chilling plates 9, the heat pipes 10, the temperature sensors 11, the electromagnetic clutch 12 and the like are used more frequently, 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 (10)

1. An air path optimization structure for a treadmill motor comprises a motor cabin, a motor arranged in the motor cabin and a fan blade arranged on a motor shaft of the motor, and is characterized in that a gap of 3-5mm is formed between the fan blade and the motor; and sound insulation materials are laid on the inner wall of the motor cabin.

2. The optimized structure of an air passage for a treadmill motor of claim 1, wherein the gap is 4 mm.

3. The optimized structure of an air passage for a treadmill motor as claimed in claim 1, wherein said motor compartment has a grid-shaped rib on the inner wall thereof, and said sound insulation material fills each grid and covers the rib.

4. The optimized structure of the wind path for the motor of the running machine as claimed in claim 1, wherein the sound insulation material is a composite sound insulation cotton, and the composite sound insulation cotton is adhered to the inner wall of the motor compartment.

5. The optimized structure of the wind path for the motor of the running machine as claimed in claim 3, wherein the casing of the motor is sleeved with a ring-shaped heat dissipating fin, and the heat dissipating fin has the same length as the casing of the motor and abuts against the sound insulation material.

6. The optimized structure of an air path for a treadmill motor as claimed in claim 5, wherein the motor compartment is provided with a plurality of through holes for ventilation at the front and rear ends thereof, and the motor compartment is made of aluminum alloy.

7. The structure of claim 1, further comprising a noise reduction circuit for electromagnetically optimizing the motor, wherein the noise reduction circuit is a low-pass filter circuit formed by a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor, one end of the first resistor is connected to the first capacitor, the other end of the first resistor is connected to the second capacitor and the second resistor, the other end of the second resistor is connected to the third capacitor, and the first capacitor, the second capacitor and the third capacitor are all grounded.

8. The wind path optimizing structure for the treadmill motor according to any one of claims 1 to 7, wherein a semiconductor cooling fin is disposed outside the motor compartment, and the semiconductor cooling fin is in contact with a housing of the motor through a plurality of heat pipes to perform heat exchange.

9. The optimized structure of an air passage for a treadmill motor as claimed in claim 8, wherein a temperature sensor is disposed on the housing of the motor, and the temperature sensor detects the temperature of the housing of the motor, so as to adjust the switch of the semiconductor cooling plate.

10. The structure of claim 9, wherein an electromagnetic clutch is disposed between the fan and the motor shaft, and the electromagnetic clutch controls the connection and the disconnection between the fan and the motor shaft.

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