KR102092780B1 - Multi-Brake Disc - Google Patents

Abstract

The present invention relates to a multi-brake disc, and more specifically, to a multi-brake disc which reduces noise and vibration by adjusting the natural frequency of a brake disc, and further maintains weight similar to a conventional one.

Description

Multi-Brake Disc {Multi-Brake Disc}

The present invention relates to a multi-brake disc, and more particularly, to a multi-brake disc capable of reducing noise and vibration by adjusting the natural frequency of the brake disc, and further maintaining the weight similar to the conventional one.

In general, a vehicle is capable of driving at a high speed, and various systems for safety of drivers and / or passengers have been developed. Among these stabilization devices, the brake system is the most basic and important system that provides braking power to a driving vehicle.

Looking at the brake disc of the above-described automobile brake system, a hub is generally connected to a wheel of a vehicle, and a friction part connected to the hub. In this case, the brake disc compresses the brake pad to generate a braking effect. Such a brake disc structure is shown in Korean Patent Publication No. 10-2013-0061246.

However, when the vehicle body is stopped or the speed is reduced by driving the above-described brake disc, noise may be greatly generated in the brake disc, which corresponds to one of the biggest complaints of users who use automobiles.

Particularly, as the braking pressure increases during the operation of the brake disc, that is, during braking, the natural frequency of the brake disc decreases and then tends to rise again. At this time, if the natural frequency of the brake disc coincides with the natural frequency of the knuckle, noise may occur along with severe vibration due to resonance.

In the case of the prior art, in order to avoid this resonance phenomenon, a method of increasing the thickness of the ribs disposed between the friction plates of the brake disc compared to the prior art was adopted. However, in the case of the prior art, the load of the brake disc is increased, and thus, the load of the entire components is not met.

1. Korea Patent Publication No. 10-2013-0061246

An object of the present invention is to provide a multiple brake disc that can reduce noise and vibration due to resonance with a knuckle when braking.

In addition, an object of the present invention is to increase the natural frequency of the brake disc so as not to coincide with the natural frequency of the knuckle, thereby providing a multiple brake disc capable of avoiding resonance.

Furthermore, an object of the present invention is to provide a multi-brake disc capable of maintaining the same or similar to the load of the brake disc while increasing the natural frequency of the brake disc.

The object of the present invention as described above is a friction part that provides frictional force by friction with a brake pad, and a plurality of friction plates are spaced apart to provide a discharge space forming a plurality of layers between the plurality of friction plates, the friction It is provided in the discharge space of each layer between the plurality of friction plates and a hub provided in the central portion of the vehicle and connected to the wheel of the vehicle, and has a plurality of ribs extending radially from the center of the friction portion to obtain a natural frequency. It is achieved by multiple brake discs characterized by increasing.

In this case, by adjusting at least one of the height of the discharge space forming the plurality of layers, the width of the ribs, and the phase of the ribs disposed on each layer of the plurality of discharge spaces, the natural frequency of the multiple brake discs is increased. Can kill.

Meanwhile, at least one phase among the ribs disposed on each layer of the plurality of discharge spaces may be different from other ribs.

In addition, at least one rib among the ribs disposed on each layer of the plurality of discharge spaces may be disposed to be staggered with respect to the other ribs without being overlapped on a plane.

In addition, the height of at least one discharge space among each layer of the plurality of discharge spaces may be different than the height of other discharge spaces.

Meanwhile, at least one width among the ribs disposed on each layer of the plurality of discharge spaces may be different from other ribs.

In addition, the increased natural frequency of the multiple brake discs may not match the natural frequency of the knuckle even when the braking pressure changes.

According to the brake disc of the vehicle of the present invention, noise and vibration due to resonance with the knuckle during braking can be reduced.

In addition, according to the present invention, it is possible to avoid the resonance phenomenon by increasing the natural frequency of the brake disc so as not to match the natural frequency of the knuckle.

Furthermore, according to the present invention, while increasing the natural frequency of the brake disc, the load of the brake disc can be maintained the same or similar to the prior art, thereby achieving light weight.

1 is a perspective view of a multiple brake disc according to an embodiment of the present invention,
Figure 2 is a plan view of Figure 1,
Figure 3 is a partial side view of Figure 1,
4 is a perspective view showing the structure of a multiple brake disc according to another embodiment,
Figure 5 is a perspective view showing the structure of a multiple brake disc according to another embodiment,
6 is a perspective view of a multiple brake disc according to another embodiment,
7 is a plan view of FIG. 6,
8 is a perspective view showing the structure of a multiple brake disc according to another embodiment,
9 is a plan view of a multiple brake disc according to another embodiment,
10 is a graph comparing the braking pressure and the natural frequency of the brake disc and the knuckle when the braking pressure is applied by driving the brake system provided in the vehicle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Unless otherwise specified, all terms in this specification are the same as the general meaning of the term understood by those skilled in the art to which the present invention belongs, and if the terms used herein conflict with the general meaning of the term In accordance with the definitions used herein. On the other hand, the configuration or control method of the apparatus to be described below is only for explaining an embodiment of the present invention and is not intended to limit the scope of the present invention, and the same reference numerals are used throughout the specification. Indicate

Hereinafter, a multi-brake disc according to the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a multiple brake disc 100 according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. In FIG. 2, a part of the first friction plate 132 and a part of the second friction plate 134 among the friction portions 130 are cut out to show the configuration of the ribs 142 and 144.

1 and 2, the multiple brake discs 100 according to the present invention provide friction with a brake pad to provide braking force, and a plurality of friction plates 132, 134, and 136 are spaced apart to arrange the plurality of frictions. A friction unit 130 providing an exhaust space for forming a plurality of layers between the plates 132, 134, and 136, and a hub 110 provided at the center of the friction unit 130 and connected to a wheel of a vehicle, and It is provided in the discharge space of each layer between the plurality of friction plates (132, 134, 136), and provided with a plurality of ribs (142, 144) extending in the radial direction from the center of the friction portion (130) The natural frequency can be increased.

Generally, a brake disc of a vehicle is connected to a vehicle body through a wheel and a knuckle of a vehicle.

In this case, noise may be greatly generated during the operation of the brake disc, which corresponds to one of the biggest complaints of users using automobiles. Particularly, as the braking pressure increases during the operation of the brake disc, that is, during braking, the natural frequency of the brake disc may decrease. At this time, if the natural frequency of the brake disc coincides with the natural frequency of the knuckle, noise may occur along with severe vibration due to resonance.

The present invention provides a brake disk capable of adjusting the natural frequency to reduce noise and vibration as described above, that is, noise and vibration due to resonance between the brake disk and the knuckle, in particular, a brake disk having an increased natural frequency. Will be provided. In addition, even when the natural frequency of the brake disc is increased as described above, the weight of the brake disc can be maintained at the same or similar level to that of the prior art. With reference to the drawings below will be described in detail.

The above-described multiple brake disc 100 may be generally made of a metal material such as cast iron or aluminum.

Looking at the configuration of the multi-brake disc 100, the multi-brake disc 100 is provided in a ring-shaped friction portion 130 generating frictional force by friction with a brake pad, and a vehicle provided at a central portion of the friction portion 130 It may be provided with a hub 110 that is connected to the wheel.

The hub 110 may be made of a material different from the material of the friction part 130, and may be made of aluminum alloy or the like having a relatively light weight for weight reduction.

The hub 110 includes an upper surface 112 protruding from the friction part 130, an extension part 114 extending from an edge of the upper surface 112 toward the bottom, and the extension part 114 and the A connecting portion 116 connecting the friction portion 130 may be provided.

In this case, the upper surface 112 of the hub 110 may be provided with various fastening holes 113 for coupling with a vehicle wheel (not shown).

Meanwhile, the friction part 130 and the hub 110 may be completed by being combined by an insert casting method.

For example, looking at the manufacturing process, the friction plates 130 are first manufactured by fabricating and assembling the friction plates 132, 134, and 136 in the form of an annular disk using a cast iron casting and a first mold.

When the friction part 130 manufactured as described above is bitten by a second mold for manufacturing the hub 110, and an aluminum casting is injected into the second mold, a hub in a form combined with the friction part 130 110 is completed.

On the other hand, the friction portion 130 can be made of a relatively heavy material while withstanding the frictional force for braking of the vehicle, such as cast iron.

Specifically, the friction part 130 may include a plurality of friction plates 132, 134, and 136 stacked and connected vertically.

For example, the friction plates 132, 134, and 136 may include a first plate 132, a second plate 134, and a third plate 136 from top to bottom in the drawing. The present embodiment is illustrated as having three friction plates, but is not limited thereto and may be appropriately modified.

At this time, the plurality of friction plates 132, 134, and 136 may be stacked at predetermined intervals in a vertical direction. In this case, the space between the plurality of friction plates (132, 134, 136) forms the discharge space (152, 154), the discharge space (152, 154) is the plurality of friction plates (132, 134, 136) may be provided by forming a plurality of layers in the vertical direction.

In this case, the height of the discharge space (152, 154) corresponds to the distance between the plurality of friction plates (132, 134, 136). Accordingly, when the distance between the plurality of friction plates 132, 134, 136 changes, the height of the discharge spaces 152, 154 also changes.

At this time, a plurality of ribs 142 and 144 may be provided in the discharge spaces 152 and 154 of each layer between the aforementioned friction plates 132, 134, and 136, respectively.

The ribs (142, 144) are disposed in the discharge spaces (152, 154) of each layer between the plurality of friction plates (132, 134, 136), radially in the radial direction from the center of the friction portion (130) It may be extended to form. At this time, the space between the ribs 142 and 144 acts as a vent hole 140 or 141 for discharging the friction heat inside the friction part 130 to the outside.

That is, when the friction part 130 generates a braking force by rubbing with the brake pad, heat is generated by friction, and the heat is discharged to the outside through the vent holes 140 and 141 to generate the braking force ( 130) can be prevented from being heated above a predetermined temperature.

On the other hand, in the case of the multi-brake disc 100 according to the present invention, the height of the plurality of discharge spaces 152 and 154, the width of the ribs 142 and 144, and each of the plurality of discharge spaces 152 and 154 By adjusting at least one of the phases of the ribs 142 and 144 disposed on the layer, the natural frequency of the multiple brake discs 100 can be increased.

That is, in order to increase the natural frequency of the multiple brake discs 100, the height of the plurality of discharge spaces 152 and 154, the width of the ribs 142 and 144, and the plurality of discharge spaces 152 in the present invention , 154 to adjust at least one of the phases of the ribs 142 and 144 disposed on each layer.

In the case of the multi-brake disc () according to the present embodiment, as shown in FIG. 2, the agent disposed in the discharge space 152 of the first layer located at the top between the plurality of friction plates 132, 134, and 136 The 1 rib 142 and the second rib 144 disposed in the discharge space 154 of the second layer positioned under the rib may have approximately the same width.

That is, the first rib 142 and the second rib 144 may be disposed in the discharge space 152 of the first layer and the discharge space 154 of the second layer while having approximately the same width.

When having such an arrangement, the stiffness between the plurality of friction plates 132, 134, and 136 can be increased compared to the prior art, thereby increasing the natural frequency of the multiple brake discs 100.

Furthermore, as shown in FIG. 2, the first rib 142 disposed in the discharge space 152 of the first layer and the second rib disposed in the discharge space 154 of the second layer positioned below the first rib 142. 144 may be disposed in the same phase with respect to the center of the friction portion 130.

That is, the first rib 142 disposed in the discharge space 152 of the first layer on the planar surface, and the second rib 144 disposed in the discharge space 154 of the second layer positioned below the each other They can be placed in overlap.

On the other hand, the distance (h ₁ , h ₂ ) between the plurality of friction plates 132, 134, 136 in the multiple brake discs 100 according to this embodiment (see FIG. 3), or the discharge spaces 152, 154 ), The heights h ₁ and h ₂ may be kept constant.

3 is a partial side view of a multiple brake disc 100 according to the present embodiment.

As shown in FIG. 3, in the case of the multi-brake disc 100 according to the present embodiment, the discharge space 152 of the first layer located at the uppermost position among the plurality of friction plates 132, 134, and 136 the height (h ₁₎ and height (h ₂₎ of the discharge space 154 in the second layer positioned in the lower portion can be equally determined with each other.

Alternatively, the distance between the plurality of friction plates 132, 134, and 136 may be kept constant, and specifically, the distance h ₁ between the first friction plate 132 and the second friction plate 134 and The distance between the second friction plate 134 and the third friction plate 136 may maintain the same distance.

As such, when the distance (h ₁ , h ₂ ) between the plurality of friction plates (132, 134, 136), or the height (h ₁ , h ₂ ) of the discharge spaces (152, 154) is kept constant It is relatively easy to manufacture the friction portion 130, it can provide a balanced appearance.

Meanwhile, FIGS. 4 to 9 show a structure of a multiple brake disc according to another embodiment. The structure of multiple brake discs according to various embodiments will be described with reference to each drawing.

4 is a perspective view showing the structure of a multiple brake disc 200 according to another embodiment. 4, the distance between the plurality of friction plates (232, 234, 236) (h ₃ , h ₄ ), or the height (h ₃ , h ₄ ) of the discharge space (152, 154) compared to the above-described embodiment ) Suggests differently determined structures. In addition, the same reference numbers are used for the same components as compared with the above-described embodiment.

Referring to FIG. 4, in the case of the multi-brake disc 200 according to the present embodiment, the height (h) of the discharge space 252 of the first layer located at the top between the plurality of friction plates 232, 234, and 236 ₃ ) and the height (h ₄ ) of the discharge space 254 of the second layer positioned below it may be determined differently.

Alternatively, a distance h ₃ between the first friction plate 232 and the second friction plate 234 and a distance between the second friction plate 234 and the third friction plate 236 may be determined differently. .

In FIG. 4, the height h ₃ of the discharge space 252 of the first layer is larger than the height h ₄ of the discharge space 254 of the second layer positioned below the first layer, but is not limited thereto. It can be variously modified.

The height change of the discharge spaces 252 and 254 may be appropriately modified according to the size, material, natural frequency, and natural frequency of the knuckle described above.

In addition, when the friction part 230 includes, for example, four or more friction plates, the distance between at least one pair of friction plates may be determined differently than the distance between other friction plates.

5 is a perspective view showing the structure of a multiple brake disc 300 according to another embodiment. FIG. 5 presents a structure in which the first rib 342 disposed on the first layer and the second rib 344 disposed on the second layer have different widths compared to the above-described embodiment. In addition, the same reference numbers are used for the same components as compared with the above-described embodiment.

Referring to FIG. 5, in the case of the multi-brake disc 300 according to the present embodiment, the first rib 342 disposed on the first layer located at the top between the plurality of friction plates 332, 334, and 336 And widths of the second ribs 344 disposed on the second layer positioned below the different widths.

When the width of the rib is changed as described above, the width of the vent hole 340 between the first rib 342 and the width of the vent hole 341 between the second rib 344 may be different.

Accordingly, a vent hole between the first ribs 342 may be different from each other by different widths of the first ribs 342 disposed on the first layer and the second ribs 344 disposed on the second layer positioned below the first rib 342. By simultaneously varying the width of 340 and the width of the vent hole 341 between the second ribs 344, the heat discharged through the vent holes 340 and 341 is effectively discharged, and at the same time, the multiple brake discs 300 Can increase the natural frequency of.

The change in the width of the ribs 342 and 344 may be appropriately modified according to the size, material, natural frequency, and natural frequency of the knuckle described above.

In addition, when the friction portion 330 includes, for example, four or more friction plates, the width of the ribs disposed in the discharge space of at least one layer may be determined differently from the width of the ribs disposed in the discharge space of the other layer. have.

6 is a perspective view showing the structure of a multiple brake disc 400 according to another embodiment, and FIG. 7 is a plan view of FIG. 6. In FIG. 7, a portion of the first friction plate 432 and a portion of the second friction plate 434 among the friction portions 430 are cut out to show the configuration of the ribs 442 and 444. In addition, the same reference numbers are used for the same components as compared with the above-described embodiment.

6 and 7, in the case of the multi-brake disc 400 according to the present embodiment, the first rib disposed on the first layer located at the top between the plurality of friction plates 432, 434, and 436 The phases of the 442 and the second rib 444 disposed in the second layer positioned below it may be determined differently.

That is, the first rib 442 disposed on the first layer on the plane and the second rib 444 disposed on the second layer positioned below the plane are not disposed to overlap each other on the plane, and the friction portion ( 430) may be staggered in different phases with respect to the center.

Thus, when the first rib 442 disposed on the first layer and the second rib 444 disposed on the second layer positioned under the first layer are alternately arranged, heat fluid flows along the respective layers By inducing differently, the natural frequency of the multiple brake discs 400 may be increased.

In addition, when the first rib 442 and the second rib 444 are disposed according to the present embodiment, heat flow discharged through the vent holes 440 and 441 of the first layer and the second layer is provided to the layer. Accordingly, heat can be discharged more effectively by differently.

In addition, when the friction portion 430 includes, for example, four or more friction plates, the phase of the ribs disposed in the discharge space of at least one layer may be determined differently from the phase of the ribs disposed in the discharge space of the other layer. have.

8 is a perspective view showing the structure of a multiple brake disc 500 according to another embodiment. The same reference numbers are used for the same components as compared with the above-described embodiment.

Referring to FIG. 8, in the case of the multi-brake disc 500 according to the present exemplary embodiment, the plurality of friction plates 532, 534, and 536 are disposed in the discharge space 552 of the first layer located at the uppermost portion The phases of the first ribs 542 and the second ribs 544 disposed in the discharge space 554 of the second layer positioned below the different ribs and the plurality of friction plates 532, 534, and 536 at the same time between it may be a height (h ₆₎ of the height of the discharge space on the first layer (552) ₍₅ h) and the discharge space of the second layer located in a lower portion 554 which is located at the top differently.

That is, the distance (h ₆₎ between the first friction plate 532 and the distance between the friction plate 534 (h ₅₎ and the second friction plate 534 and the third friction plate 536 It can be determined differently.

In this way, the height h ₅ of the discharge space 552 of the first layer and the height h ₆ of the second discharge space 554 are different, and at the same time, the first rib 542 and the second rib 544 are provided. By being staggered with each other, the natural frequency of the multiple brake discs 500 can be increased more effectively.

FIG. 9 is a plan view showing a portion of the first friction plate 632 and a portion of the second friction plate 634 among the friction portions 630 to show the configuration of the ribs 642 and 644. The same reference numbers are used for the same components as compared with the above-described embodiment.

Referring to FIG. 9, in the case of the multi-brake disc 600 according to the present embodiment, the first rib 642 disposed on the first layer located at the top between the plurality of friction plates 632, 634, and 636 And the phases of the second ribs 644 disposed on the second layer located at the bottom thereof are different from each other, and the widths of the first ribs 642 and the widths of the second ribs 644 are different from each other. .

In this case, by varying the width and phase of the first rib 642 and the second rib 644, it is possible to more effectively change the natural frequency of the multiple brake discs 600.

10 is a graph comparing the braking pressure and the natural frequency of the brake disc and the knuckle when the braking pressure is applied by driving the brake system provided in the vehicle. In Fig. 10, the horizontal axis shows the braking pressure, and the vertical axis shows the frequency according to the natural frequency.

Referring to FIG. 10, the natural frequency of the brake disc changes according to the braking pressure.

That is, looking at the change in the natural frequency curve A of the brake disc according to the prior art, the braking pressure decreases as it increases, and when a braking pressure of a certain value or more acts, it tends to rise again.

At this time, looking at the natural frequency curve (A) of the brake disc according to the prior art, when it first decreases and then rises again, as shown in the figure, the natural frequency of the knuckle passes two times (two intersections, C ), A resonance phenomenon occurs at a point where the natural frequency of the brake disc and the natural frequency of the knuckle are the same, which significantly increases noise and vibration.

On the other hand, in the case of multiple brake discs according to the present invention, the natural frequency increases according to the above-described embodiment. Therefore, as shown in the figure, the natural frequency curve B of the multiple brake discs according to the present invention rises along the vertical axis compared to the conventional natural frequency curve.

Therefore, even when the natural frequency of the multiple brake discs according to the present invention decreases with the increase of the braking pressure and then rises again, it does not meet the natural frequency of the knuckle as shown in the figure.

As a result, in the case of the multi-brake disc according to the present invention, by increasing the natural frequency, it is possible to prevent resonance with the knuckle and significantly reduce noise and vibration even when the braking pressure is increased.

The inventor performed an experiment to confirm the effect of increasing the natural frequency of the multiple brake discs according to the present invention, and [Table 1] below shows the experimental results.

Natural frequency of comparative example (Hz) Natural frequency of Example 1 (Hz) Natural frequency of Example 2 (Hz) 3Z 1909 1946 (1.9% ↑) 2082 (9.1% ↑) 4Z 3075 3205 (4.2% ↑) 3500 (13.8% ↑) 5Z 5505 5817 (5.7% ↑) 6523 (18.5% ↑) 6Z 8107 8438 (4.1% ↑) 9573 (18.1% ↑)

[Table 1] compares and shows the natural frequencies according to the frequency modes (3Z, 4Z, 5Z, and 6Z) of the brake disc. Here, the 'comparative example' corresponds to a brake disc according to the prior art, and has a pair of friction plates and a structure having a plurality of ribs between the pair of friction plates.

Meanwhile, Embodiment 1 shows the structure according to FIG. 1 in the present invention, and Embodiment 2 shows the structure according to FIG. 6.

Looking at [Table 1], it can be seen that the natural frequency of the brake disc increases according to the frequency mode.

In addition, it can be seen that in each frequency mode, the natural frequencies of Examples 1 and 2 were all increased compared to Comparative Examples.

For example, in the case of Example 1, the natural frequency increase effect of 1.9%, 4.2%, 5.7%, and 4.1% occurred in each frequency mode.

In addition, in the case of Example 2, the natural frequency increase effect of 9.1%, 13.8%, 18.5%, and 18.1% occurred in each frequency mode.

After all, in the case of the multiple brake discs according to the present invention, it can be seen that the natural frequency increases compared to the brake discs according to the prior art, and the effect of increasing the natural frequency is excellent in the case of Example 2 compared to Example 1. You can.

The present invention can be implemented by being modified in various forms, and the scope of the right is not limited to the above-described embodiment. Therefore, if the modified embodiment includes the components of the claims of the present invention, it should be regarded as belonging to the scope of the present invention.

100: multiple brake discs
110: hub
130: friction part
132: first friction plate
134: second friction plate
136: third friction plate
142: first rib
144: second rib

Claims (7)

A friction unit frictional with a brake pad to provide a braking force, and a plurality of friction plates are spaced apart to provide a discharge space for forming a plurality of layers between the plurality of friction plates;
A hub provided in the central portion of the friction portion and connected to a wheel of a vehicle; And
It is provided in the discharge space of each layer between the plurality of friction plates, a plurality of ribs formed in the radial direction extending from the center of the friction portion; having a natural frequency to increase,
Adjusting at least one of the height of the discharge space forming the plurality of layers, the width of the ribs and the phase of the ribs disposed on each layer of the plurality of discharge spaces,
Multiple brake discs, characterized in that the height of at least one discharge space in each layer of the plurality of discharge spaces is different than the height of the other discharge spaces.

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