KR200471660Y1 - Low noise wheel - Google Patents

Abstract

The soundproof wheel according to the present invention is generated from the wheel body described above through contact friction with the wheel body and the wheel body provided with a contact surface coupled to the axle while contacting the rail and inclined toward the axle while integrally rotating. It is made of a metal material that absorbs the vibration to form an outer circumferential surface corresponding to the contact surface described above and the ring damper fixed to the wheel body, and the elastic material to absorb the vibration generated from the wheel body through the plastic deformation and viscous damping And a damping member interposed between the outer circumferential surface of the above-mentioned ring damper and the above-mentioned contact surface, wherein the above-described ring damper and the above-mentioned damping member are divided into at least one arc shape along the forming direction of the above-described contact surface, A seating groove in which the above-mentioned damping member is fixed is formed along the outer circumferential surface of one ring damper, The damping member is fixed to the aforementioned receiving groove is formed along the projecting direction of the aforementioned recess.

Description

Soundproofing Wheels {LOW NOISE WHEEL}

The present invention relates to a soundproof wheel, and more particularly, a soundproof wheel that can effectively reduce vibrations and noises generated from a wheel body, particularly friction noises, by a damping member interposed between an outer circumferential surface of a ring damper and an inclined surface of a wheel body. It is about.

Recently, as the construction of subways, light rail and high-speed railways has been actively carried out, measures to reduce noise and vibration have also emerged as the biggest challenges.

In the low speed range (80 km / h or less), the noise generated from the propulsion system generally acts as one of the biggest sources of noise. In the medium speed range (80 km / h / 250 km / h), the noise generated by the interaction between the wheel body and the rail is the largest. It acts as one of the sources of noise.

Among them, the noise caused by the propulsion system can be effectively reduced by establishing countermeasures for the device itself, but the noise caused by the interaction between the wheel body and the rail is very complicated and diverse. Various reduction measures are applied, such as a method, a method of supplying lubricant to the wheel surface or the rail surface to reduce noise caused by the contact between the wheel body and the rail.

Noise caused by the interaction between the wheel body and the rail is caused by rolling noise generated in a straight section according to the generating mechanism, squeal noise and wheel howing noise generated in a curved section, a turnout and It is largely divided into impact noise generated at the joint of the rail.

Among these noises, especially in subways or light rail trains with a large number of sections of curved rails, friction noise is frequently generated, thereby increasing the inconvenience of users.

Frequent occurrence of friction noise in a large section of curved rails such as subways or light rails is fixed to both ends of the axle, which is in contact with the rails and interlocks with the axles, and the inner structure of the wheel body is provided with a predetermined side slope. Is caused.

That is, the step surface of the wheel body in contact with the rail is inclined so that the distance from the center of the axle to the contact of the wheel body in contact with the rail can be adjusted so that the curved rail can travel.

However, since the axle and the wheel body are integrally rotated in a firmly fixed state so as not to allow flow, the wheel body on the curved rail is difficult to perform smooth curve running due to its structural characteristics.

That is, the wheel body slides in the transverse direction on the rail surface of the rail due to the shape of the answer surface having a predetermined gradient, and the inherent mode of the wheel body is excited while passing the stick-slip state. Structure-borne noise turns into air-borne noise, resulting in very large vibrations and noise.

The vibration and noise described above may also be generated by friction between the wheel body and the brake during braking.

The present invention devised to improve the above problems relates to effectively reducing vibrations and noises generated from the wheel body, in particular, friction sounds.

In addition, the present invention relates to the damping member to be easily installed in the wheel body.

The soundproof wheel according to the present invention is a wheel body provided with a contact surface which is coupled to the axle and integrally rotates to contact the rail and is inclined toward the axle, and the aforementioned wheel body through contact friction with the wheel body described above. A ring damper made of a metal material absorbing the generated vibration and fixed to the wheel body by forming an outer circumferential surface corresponding to the contact surface described above, and an elastic material absorbing the vibration generated from the wheel body through plastic deformation and viscous damping. And a damping member interposed between the outer circumferential surface of the above-mentioned ring damper and the above-mentioned contact surface, wherein the above-described ring damper and the above-mentioned damping member are divided into at least one arc shape along the forming direction of the above-described contact surface, A seating groove to which the above-mentioned damping member is fixed is formed along the outer circumferential surface of the above-described ring damper, The damping member is a structure that protrudes along the formation direction of the aforementioned fixed to the aforementioned receiving groove receiving groove.

According to a preferred embodiment, the above-mentioned damping member is made of any one of natural rubber, synthetic rubber or synthetic resin.

The area in which the above-mentioned seating groove is formed is preferably 50 to 70% of the area formed by the outer circumferential surface of the above-mentioned ring damper, and the distance from the outer circumferential surface of the above-mentioned ring damper to the bottom surface of the above-mentioned seating groove has the damping member. It is preferred that it is 50 to 60% of the thickness.

The above-mentioned ring damper is coupled to the above-mentioned wheel body by a fastening member coupled in parallel to the longitudinal direction of the above-described axle, and elastically inclined toward the end side of the above-mentioned fastening member between the end of the above-mentioned fastening member and the above-mentioned ring damper. It is preferable that the supporting spring washer is interposed.

On the other hand, the soundproof wheel according to another embodiment of the present invention is coupled to the axle and rotated integrally in contact with the rail and the first contact surface and the second contact surface inclined toward the axle on both sides perpendicular to the longitudinal direction of the axle, respectively The wheel body is made of a metal material which absorbs the vibration generated from the wheel body through the contact friction between the wheel body and the wheel body described above, and forms an outer circumferential surface corresponding to the above-described first contact surface to be fixed to the wheel body. The first ring damper is made of a metal material which absorbs vibration generated from the wheel body described above through contact friction between the wheel body and the wheel body described above, and forms an outer circumferential surface corresponding to the above-described second contact surface and is fixed to the wheel body. 2-ring damper and elastic material absorbing vibration generated from the wheel body described above through plastic deformation and viscous damping. And a damping member interposed between the outer circumferential surface of the first and second ring dampers described above and the first and second contact surfaces described above, and the first and second ring dampers described above and the damping members described above. At least one divided along the forming direction of the contact surface, the seating groove is formed is fixed to the above-mentioned damping member is formed along the outer peripheral surface of the above-mentioned first and second ring damper, the damping member is fixed to the seating groove described above It is also possible to apply a structure that protrudes along the formation direction of one seating groove.

According to another preferred embodiment, the above-mentioned first and second ring dampers are coupled to the above-described wheel body by a fastening member coupled in parallel to the longitudinal direction of the above-described axle, and the end of the above-mentioned fastening member and the above-mentioned first , Between the two ring dampers is provided with a spring washer that is elastically supported inclined toward the end side of the above-mentioned fastening member.

The damping member described above is preferably made of any one of natural rubber, synthetic rubber or synthetic resin.

As described above, the soundproof wheel according to the present invention has the following advantages.

First, according to a structure in which a damping member made of an elastic material for plastic deformation and viscous damping is mounted between the wheel body and the ring damper, the vibration generated from the wheel body and the noise caused by the aforementioned vibrations can be essentially blocked.

In addition, the fastening operation can be easily performed regardless of the level of skill, according to the structure in which the damping member is fixed along the outer circumferential surface of the ring damper facing the contact surface of the wheel body.

Further, according to the structure of the ring damper and the damping member divided into at least one arc shape along the direction in which the contact surface of the wheel body is formed, the fastening, checking and replacement can be smoothly performed even when the axle and the wheel body are coupled. have.

In addition, since the fastening member is fastened in a direction parallel to the axle to strongly compress the damping member interposed between the contact surface of the wheel body and the outer circumferential surface of the ring damper, vibration generated during driving can be prevented, resulting in minimizing noise generation. Can be.

1 is a perspective view showing the overall structure of a soundproof wheel according to an embodiment of the present invention
Figure 2 is a cross-sectional conceptual view showing the overall structure of the soundproof wheel according to an embodiment of the present invention
Fig. 3 is a partial enlarged view of Fig. 2
Figure 4 is a perspective view showing the overall structure of the soundproof wheel according to another embodiment of the present invention
5 is a cross-sectional conceptual view showing the overall structure of a sound insulation wheel according to another embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

This is intended to be illustrative in nature to enable those skilled in the art to readily implement the invention, and this does not mean that the technical idea and scope of the invention is limited.

In addition, the size and shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms defined in particular in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or the operator And the definitions of these terms should be based on the contents throughout this specification.

1 is a perspective view showing the overall structure of the soundproof wheel according to an embodiment of the present invention, Figure 2 is a cross-sectional conceptual view showing the overall structure of the soundproof wheel according to an embodiment of the present invention.

Soundproof wheel according to an embodiment of the present invention can be understood that the wheel body 100, the ring damper 200, and the damping member 300 is configured to include.

In the drawings, reference numeral 600 denotes a fastening member such as a wrench bolt for fixing the ring damper 200 to the wheel body 100.

The wheel body 100 is coupled to the axle 400 to rotate integrally in contact with the rail 500, the contact surface 110 is inclined toward the axle 400 is provided, which supports the axle 400 as a whole The bearing portion 101, the answer surface portion 103 in contact with the rail 500, and the reinforcement portion 102 that connects between the bearing portion 101 and the answer surface portion 103.

Ring damper 200 is made of a durable metal material such as stainless steel to form a ring shape as a whole to absorb the vibration generated through contact friction with the wheel body 100, the outer peripheral surface corresponding to the contact surface 110 Form 210 is to be fixed to the wheel body (100).

The damping member 300 is interposed between the outer circumferential surface 210 of the ring damper 200 and the contact surface 110 of the wheel body 100 to absorb the vibration generated from the wheel body 100, and is made of an elastic material. .

The present invention can be applied by the embodiment as described above, will be described in more detail for the main part of the present invention for a more detailed description.

Figure 2 is a cross-sectional conceptual view showing the overall structure of the sound insulation wheel according to an embodiment of the present invention, Figure 3 is a partial enlarged view of FIG.

As described above, the wheel body 100 is coupled to the axle 400 to contact the rail 500 while integrally rotating to provide a space in which the ring damper 200 and the damping member 300 are mounted.

The ring damper 200 serves to absorb vibration generated through contact friction with the wheel body 100 as described above, and the contact surface 110 of the wheel body 100 by a fastening member 600 such as a wrench bolt. It is fixed to the), and because it is a mass body made of a metal material such as stainless steel changes the natural frequency as the mass of the wheel body 100 and the axle 400 is increased.

That is, since the natural frequency of the object is proportional to the square root of stiffness and inversely proportional to the square root of mass, the wheel body 100 equipped with the ring damper 200 has a lower natural frequency than the existing wheel body.

Therefore, the wheel body 100 of the soundproof wheel according to the exemplary embodiment of the present invention may be changed so that the vibration mode of the wheel body 100 is reduced in the generation of friction sound by the change of the natural frequency as described above.

Meanwhile, it can be seen that the ring damper 200 is coupled to the wheel body 100 by a fastening member 600 coupled in parallel to the longitudinal direction of the axle 400 as shown in FIGS. 1 to 3.

Here, a spring washer 610 is disposed between the end of the fastening member 600, that is, the head of the wrench bolt and the fastening groove 201 formed in the ring damper 200 to incline and elastically support the head of the wrench bolt. It is preferable to be.

At this time, as the spring washer 610 moves while the fastening member 600 is screwed toward the wheel body 100 side, the wheel through the fastening member 600 acts elastically repulsive force in the opposite direction to the moving direction of the fastening member 600. The body 100 and the ring damper 200 serves to strengthen the fastening force between each other.

The damping member 300 absorbs the vibration transmitted from the wheel body 100 through plastic deformation and viscous damping of the material itself as described above, and for example, synthetic resin such as natural rubber, synthetic rubber, or polyurethane pad. By adopting a material having excellent vibration absorption, such as may be seated on the outer circumferential surface 210 of the ring damper 200.

In addition, the damping member 300 may be formed by spraying and coating a liquid containing the aforementioned components on the outer circumferential surface 210 of the ring damper 200.

When the damping member 300 is fixed to the outer circumferential surface 210 of the ring damper 200, it is preferable to form a seating groove 220 to which the damping member 300 is fixed along the outer circumferential surface 210. 300 is preferably fixed to the seating groove 220 and protrudes along the forming direction of the seating groove 220.

Here, the damping member 300 is orthogonal to the contact surface 110 and the outer circumferential surface 210, including a direction orthogonal to the axle 400, which is a main vibration generating direction from the wheel body 100 to the axle 400. It serves to increase the shock absorbing power over the entire direction up to the inclination with the axle 400.

The area in which the seating groove 220 is formed may be formed to about 50 to 70%, more preferably about 60% of the area formed by the outer circumferential surface 210 of the ring damper 200.

Here, when the seating groove 220 is less than 50% of the area of the outer circumferential surface 210, the damping member 300 is insufficient in contact with the contact surface 110 to prevent the smooth vibration absorption, the wheel body 100 The problem may occur that the amount of vibration and noise transmitted from the ring damper 200 from the offset does not cancel.

At this time, when the seating groove 220 exceeds 70% of the area of the outer circumferential surface 210, the damping member 300 is in contact with the contact surface 110 is too large to prevent the smooth vibration absorption, the wheel body ( The ring damper 200 may not be fixed from the 100 and may be separated.

Meanwhile, as shown in FIG. 3, the distance d from the outer circumferential surface 210 of the ring damper 200 to the bottom surface of the seating recess 220 is 50 to 60% of the thickness h of the damping member 300. Be sure to

Here, when the distance d is less than 50% of the thickness h, the damping member 300 may not be fixed between the wheel body 100 and the ring damper 200 and may be separated.

At this time, when the above-mentioned distance (d) exceeds 60% of the thickness (h), since the portion of the wheel body 100 and the ring damper 200 is in contact with each other by continuous vibration and impact, smooth vibration absorption It is not possible to generate noise and friction is also inevitable.

On the other hand, the present invention can be applied to the embodiment as described above, as well as to the embodiment as described above.

That is, since the ring damper 200 and the damping member 300 are fixed to the contact surface 110 of the wheel body 100, when the ring damper 200 and the damping member 300 are manufactured in a ring shape having a closed curve as illustrated in FIG. 1, the wheel body 100 and the axle 400 may be separated. Before coupling can be easily fixed, there is a cumbersome point to combine the wheel body 100 already coupled to the axle 400.

Accordingly, at least one ring damper 200 and the damping member 300 may be easily coupled to the wheel body 100 that is already coupled to the axle 400 along the forming direction of the contact surface 110 as shown in FIG. 4. It is preferable to divide into the above arc shape.

In addition, the present invention can be applied to the embodiment as described above, as well as to the embodiment as described above.

For reference, Figure 5 is a cross-sectional conceptual view showing the overall structure of the sound insulation wheel according to another embodiment of the present invention.

According to another embodiment of the present invention, the soundproof wheel includes a wheel body 100 ′, a first ring damper 200 ′, a second ring damper 200 ″, and a damping member 300 as shown. It can be seen that the structure to include.

The wheel body 100 ′ is coupled to the axle 400 (refer to FIG. 1 hereinafter) and contacts the rail 500 (refer to FIG. 1 hereinafter) while integrally rotating, and the axle ( The first contact surface and the second contact surface which are inclined toward 400 are respectively provided.

The wheel body 100 ′ includes a bearing portion 101 ′ to which the axle 400 is coupled, a tread portion 103 ′ in contact with the rail 500, and a bearing portion 101 ′ and a tread portion 103 described above. And a reinforcing portion 102 'interconnecting the').

The first contact surface 111 and the second contact surface 112 are formed along the inner surface of the step surface portion 103 ', respectively, and are equipped with a first ring damper 200' and a second ring damper 200 "which will be described later. Provide space to become.

The first ring damper 200 ′ absorbs vibration generated from the wheel body 100 ′ through contact friction with the wheel body 100 ′. The first ring damper 200 ′ is made of a metal material such as stainless steel, and has a first contact surface 111. The outer circumferential surface 210 ′ corresponding to the wheel body 100 ′ is fixed to the wheel body 100 ′.

The second ring damper 200 ″ absorbs vibration generated from the wheel body 100 ′ through contact friction with the wheel body 100 ′. The second ring damper 200 ″ is made of a metal material such as stainless steel and has a second contact surface 112. The outer circumferential surface 210 "corresponding to) is formed and fixed to the wheel body 100 '.

The damping member 300 is interposed between the outer circumferential surfaces 210 ′ and 210 ″ of the first and second ring dampers 200 ′ and 200 ″ and the first and second contact surfaces 111 and 112, through plastic deformation and viscous damping. It serves to absorb the vibration generated from the wheel body (100 ').

Here, the first and second ring dampers 200 'and 200 "and the damping member 300 are divided into at least one or more along the forming direction of the first and second contact surfaces 111 and 112, and the first and second ring dampers ( The mounting grooves 220 'and 220 "to which the damping member 300 is fixed are formed along the outer circumferential surfaces 210' and 210" of the 200 'and 200 ".

At this time, the damping member 300 is fixed to the mounting grooves 220 ', 220 "to protrude along the forming direction of the mounting grooves 220', 220".

In addition, the first and second ring dampers 200 'and 200 "are connected to the wheel body 100' by fastening members 600 'and 600", such as wrench bolts, which are coupled in parallel to the longitudinal direction of the axle 400. It can be seen that it is combined.

Here, the above-mentioned wrench is provided between the ends of the fastening members 600 'and 600 ", that is, between the head of the wrench bolt and the fastening grooves 201' and 201" formed in the first and second ring dampers 200 'and 200 ", respectively. Preferably, spring washers 610 'and 610 "which are elastically inclined toward the head side of the bolt are interposed therebetween.

At this time, the spring washers 610 ', 610 "acts elastic repulsion force in the opposite direction to the direction of movement of the fastening members 600', 600" as the fastening member 600 is screwed to the wheel body 100 '. The wheel body 100 'and the first and second ring dampers 200' and 200 "through the fastening members 600 'and 600" serve to strengthen the fastening force.

The damping member 300 absorbs vibration transmitted from the wheel body 100 ′ through plastic deformation and viscous damping of the material itself as described above. For example, the damping member 300 may be made of natural rubber, synthetic rubber, or polyurethane pad. By adopting a material having excellent vibration absorption, such as synthetic resin, it can be mounted on the outer peripheral surfaces 210 ', 210 "of the first and second ring dampers 200', 200".

In addition, the damping member 300 may be formed by spraying and coating a liquid containing the above-mentioned components on the outer peripheral surfaces 210 'and 210 "of the first and second ring dampers 200' and 200". .

Accordingly, the first and second ring dampers 200 ′ and 200 ″ attenuate the vibration generated from the vehicle body 100 together with the damping member 300 to reduce noise.

As described above, the present invention can effectively reduce vibrations and noises generated from the wheel body, in particular, friction noise, and provide a soundproof wheel in which a damping member can be easily installed on the wheel body. Able to know.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

Therefore, the true scope of technical protection of this invention should be determined by the following claims.

100, 100 '... wheel body 101, 101' ... bearing
102, 102 '... reinforcement section 103, 103' ...
110 ... contact surface 111 ... first contact surface
112 ... 2nd contact surface 200 ... ring damper
200 '... first ring damper 200' ... second ring damper
201, 201 ', 201 "... Tightening grooves 210, 210', 210" ... Outer circumference
220, 220 ', 220 "... sitting groove 300 ... damping member
400 axle 500 rail
600, 600 ', 600 "... fasteners 610, 610', 610" ... spring washers
d ... distance from the outer circumferential surface 210 to the bottom surface of the seating groove 220
h ... thickness of the damping member

Claims (6)

A wheel body 100 coupled to the axle 400 and in contact with the rail 500 while integrally rotating and having a contact surface 110 inclined toward the axle 400;
The wheel body 100 is formed of a metal material that absorbs vibration generated from the wheel body 100 through contact friction with the wheel body 100, and forms an outer circumferential surface 210 corresponding to the contact surface 110. Ring damper 200 is fixed to the;
A damping member (300) formed of an elastic material absorbing vibration generated from the wheel body (100) through plastic deformation and viscous damping and interposed between the outer circumferential surface of the ring damper (200) and the contact surface (110); In the soundproof wheel comprising:
The ring damper 200 and the damping member 300 are formed by dividing at least one into an arc shape along the forming direction of the contact surface 110,
A seating groove 220 to which the damping member 300 is fixed is formed along the outer circumferential surface of the ring damper 200.
The damping member 300 is selected from natural rubber, synthetic rubber or synthetic resin, is fixed to the mounting groove 220 is formed to protrude along the forming direction of the mounting groove 220,
The outer circumferential surface 210 of the ring damper 200 is coated with a liquid containing a selected component of natural rubber, synthetic rubber, polyurethane,
The area where the seating groove 220 is formed is 50 % to 70% of the area formed by the outer circumferential surface 210 of the ring damper 200,
The distance d from the outer circumferential surface 210 of the ring damper 200 to the bottom surface of the seating groove 220 is 50 % to 60% of the thickness h of the damping member 300.
The ring damper 200 is coupled to the wheel body 100 by a fastening member 600 coupled in parallel to the longitudinal direction of the axle 400, the end of the fastening member 600 and the ring damper ( Soundproof wheel, characterized in that the spring washer 610 is interposed between the elastic member to be inclined toward the end side of the fastening member 600.
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