Impact brake disk assembly for mitigating noise, vibration, and harshness of brake system

Abstract

The present invention relates to an impact brake disk assembly capable of mitigating noise, vibration, and harshness (NVH) generated in a brake system of a vehicle.

Description

Crash brake disc assembly for improving noise and vibration of the braking system

[0001] The present invention relates to a crash brake disc assembly capable of improving noise and vibration (NVH, Noise Vibration Harshness) generated from a braking device of a vehicle.

[0002]

[0003] In general, squeal noise generated from the braking system when driving a vehicle can cause noise and vibration harshness (NVH) problems in the vehicle and act as a factor that reduces ride comfort.

[0004] In order to improve the noise and vibration problems of the above braking system, it is important to dampen the brake disc, which accounts for a large portion of the braking system.

[0005] Accordingly, a method of changing the friction coefficient by coating the surface of a brake disc or changing the material has been previously proposed to reduce noise and vibration problems of a braking device.

[0006] However, the existing noise and vibration reduction methods described above may cause noise and vibration to increase and ride comfort to deteriorate as the disc surface and coating layer are damaged due to aging of the brake device.

[0007] Meanwhile, in another existing embodiment, a method of changing the disk shape of the braking device to set the resonance frequency to a low-noise range was also used.

[0008] However, this method may result in increased weight and material costs of the brake device, as well as problems with brake device installation space.

[0009]

[0010] The present invention is intended to solve the above-described problems, and its purpose is to provide a crash brake disc assembly that can improve the vibration noise (NVH) generated from the braking system of a vehicle.

[0011]

[0012] In order to achieve the above-described purpose, the present invention provides a crash brake disc assembly comprising: a first disc plate having a fastening portion on a central axis so as to be coupled to a vehicle wheel, and having a plurality of seating grooves radially spaced apart at a predetermined angle from the central axis on one surface thereof; a second disc plate integrally formed on one surface of the first disc plate to block openings of the seating grooves; and a plurality of impact bodies rotatably inserted into the plurality of seating grooves; wherein noise and vibration (NVH) generated when a braking device is operated can be attenuated by the plurality of impact bodies inelastically colliding with the inner peripheral surfaces of the first and second disc plates.

[0013] In this case, the fixing groove may include a groove formed with a predetermined length toward the central axis from the edge of the first disk plate.

[0014] Additionally, the above impactor may include a plurality of impactors arranged along the length direction of the above fixing groove.

[0015] In addition, the edges of the first and second disk plates may include a coupling ring that is coupled to prevent the impactor inserted into the mounting groove from being detached to the outside due to centrifugal force.

[0016] Additionally, the above-mentioned collision body may include one formed in a spherical shape.

[0017]

[0018] The collision brake disc assembly for improving noise and vibration of a braking device according to the present invention having the above configuration is configured by inserting a plurality of impact bodies into a seating groove between the first and second disc plates, so that when the braking device is operated, the impact bodies can move within the seating groove and generate an inelastic collision on the inner peripheral surfaces of the first and second disc plates, thereby reducing the vibration noise (NVH) generated from the braking device.

[0019] In this case, since the above-mentioned impactor is configured to be inserted and applied between the first and second disk plates, it can be applied immediately without significantly changing the shape of the existing disk assembly.

[0020]

[0021] Figure 1 is a perspective view of a crash brake disc assembly for improving noise and vibration of a braking device according to the present invention.

[0022] Figure 2 is an exploded perspective view of a crash brake disc assembly according to the present invention;

[0023] Figure 3 is a plan view of a crash brake disc assembly according to the present invention;

[0024] Figure 4 is a cross-sectional view taken along line I-I' of Figure 3;

[0025] Figure 5 is a cross-sectional view showing the state in which the impact body of the impact brake disc assembly according to the present invention is arranged.

[0026] Figure 6 is a finite element model for verifying the damping performance of the impact brake disc assembly according to the present invention.

[0027] Figure 7 is a drawing explaining a theoretical model of a collision body colliding with the inner surface of the first and second disk plates according to the present invention.

[0028] Figure 8 shows the results of comparing the damping performance of the first and second disk plates into which the impactor according to the present invention is inserted using the brake torque variation (BTV) spectrum.

[0029]

[0030] ※Explanation of symbols※

[0031] 100: Crash brake disc assembly 110: First disc plate

[0032] 111: Fastener 113: Fastener

[0033] 114: Bulkhead 115: Mounting groove

[0034] 117: Coupling ring 120: Second disk plate

[0035] 130: Collider

[0036]

[0037] The configuration and operation of a specific embodiment of the present invention will be described in detail with reference to the attached drawings.

[0038] Here, when adding reference signs to components of each drawing, it should be noted that identical components are indicated with the same signs as much as possible even if they are shown in different drawings.

[0039] Fig. 1 is a perspective view of a crash brake disc assembly for improving noise and vibration of a braking device according to the present invention, and Fig. 2 is an exploded perspective view of a crash brake disc assembly according to the present invention.

[0040] Referring to FIG. 1, a crash brake disc assembly (100) for improving noise and vibration (NYH) of a braking device according to a preferred embodiment of the present invention may include a first disc plate (110), a second disc plate (120), and an impact body (130).

[0041] The composition of the present invention is described in detail as follows.

[0042]

[0043] First, the first disc plate (110) forms the main body of the braking device, and the first disc plate (110) may be provided with a fastening portion (111) on the central axis so that it can be coupled to a vehicle wheel. In addition, the fastening portion (111) may be provided with a plurality of fastening holes (113) so that the first disc plate (110) can be fastened to the vehicle wheel via a fastening member.

[0044] In addition, on one surface of the first disk plate (110), a plurality of fixing grooves (115) formed via a partition wall (114) can be arranged radially spaced apart at a predetermined angle based on the central axis.

[0045] In this case, the above-mentioned settling groove (115) can be formed with a predetermined length toward the central axis from the edge of the first disk plate (110), and a plurality of impact bodies (130) to be described later can be inserted and arranged within the above-mentioned settling groove (115).

[0046]

[0047] Referring to FIG. 2, the second disc plate (120) may be integrally formed on one side of the first disc plate (110) to block the upper opening of the mounting groove (115) based on the drawing. That is, the mounting groove (115) may be formed in the form of a hole of a predetermined length within the space between the first disc plate (110) and the second disc plate (120).

[0048] In addition, a coupling ring (117) may be coupled to the outer opening of the mounting groove (115) at the edge of the first disk plate (110) and the second disk plate (120). Accordingly, it is possible to prevent a plurality of impact bodies (130) inserted into the mounting groove (115) between the first disk plate (110) and the second disk plate (120) from being detached to the outside due to centrifugal force.

[0049] In addition, the inner opening of the above-mentioned settling groove (115) may be formed to be smaller than the diameter of the impactor (130) to prevent the impactor (130) from coming off, or may be formed to have a structure in which the inner opening of the above-mentioned settling groove (115) is blocked by installing a separate structure.

[0050]

[0051] Referring to FIGS. 3 and 4, the impactor (130) is rotatably inserted into a plurality of fixing grooves (115), and the impactor (130) can attenuate noise and vibration (NYH) generated when the vehicle's braking system is operated.

[0052] Specifically, the above impactor (130) may be formed in a spherical shape, and a plurality of such impactors (130) may be arranged along the longitudinal direction within a plurality of fixing grooves (115) radially arranged on the first disk plate (110) as shown in FIG. 5.

[0053] That is, when the braking device equipped in the vehicle operates, noise and vibration (NVH) is generated, and the plurality of impact bodies (130) can attenuate the noise and vibration (NVH) by inelastically colliding with the inner surfaces of the first disc plate (110) and the second disc plate (120).

[0054] In this case, the impactor (130) may be formed of a material (such as steel) similar to the first and second disk plates (110, 120).

[0055] In addition, the above-mentioned impact body (130) must have a clearance so that it can move smoothly within the mounting groove (115) between the first and second disk plates (110, 120) and cause an inelastic collision.

[0056] For reference, an inelastic collision is a collision in which, during the collision process between the first and second disk plates (110, 120), some of the kinetic energy before the collision is lost due to deformation, sound, heat, etc. of the first and second disk plates (110, 120), and the kinetic energy after the collision is reduced.

[0057]

[0058] The collision brake disc assembly (100) for improving noise and vibration of a braking device according to the present invention having the above configuration is configured by inserting a plurality of impact bodies (130) into the mounting grooves (115) between the first and second disc plates (110, 120), so that when the braking device is operated, the impact bodies (130) move within the mounting grooves (115) and cause an inelastic collision on the inner peripheral surfaces of the first and second disc plates (110, 120). Accordingly, the vibration noise (NVH) generated in the braking device can be reduced.

[0059]

[0060] <Experimental Example>

[0061] An experiment was conducted to verify the performance of a crash brake disc assembly (100) for improving noise and vibration of a braking device according to the present invention.

[0062] Figure 6 is a finite element model for verifying the damping performance of the impact brake disc assembly (100) according to the present invention.

[0063] Referring to Fig. 6, the fastening part (111) provided at the center of the first disc plate (110) was given a fixed-end condition, and the pressure of the pad used the specifications of the braking pressure to be currently applied. In addition, in order to simulate the movement of the vehicle wheel, the force condition was set so that the pressure position of the pad rotates with respect to the central axis over time. In addition, a time analysis was performed for the numerical analysis model, and the collision damping between the impactor (130) and the first and second disc plates (110, 120) tracked the real-time position change to simulate an inelastic collision.

[0064] Figure 7 is a drawing explaining a theoretical model of an impact body (impact damper) (130) colliding with the inner surface of the first and second disk plates (110, 120).

[0065] Referring to FIG. 7, the impactor (130) collides with the inner surface of the first and second disk plates (110, 120) due to a change in speed (deceleration, acceleration, etc.) of the first and second disk plates (110, 120), and when the vibration of the first and second disk plates (110, 120) is attenuated to a certain extent, the impactor stops due to dissipation of kinetic energy.

[0066] Figure 8 shows the results of comparing the damping performance of the first and second disk plates (110, 120) with the impactor inserted using the brake torque variation (BTV) spectrum.

[0067] Referring to Fig. 8, it can be seen that the frequency response is lowered across all frequencies due to the damping of the impactor (130). This is expected to help improve noise, vibration, and harshness (NVH).

[0068]

[0069] Although the present invention has been described and illustrated with specific embodiments above, the present invention is not limited to the above-described embodiments, and various changes and modifications are possible within a scope that does not depart from the technical spirit of the present invention.

Claims

1. A first disc plate having a fastening portion provided on a central axis so as to be coupled to a vehicle wheel, and having a plurality of fixing grooves radially spaced apart at a predetermined angle based on the central axis on one surface; A second disk plate integrally formed on one side of the first disk plate to block the opening of the mounting groove; and Including a plurality of impactors rotatably inserted into the plurality of fixing grooves; A crash brake disc assembly that can attenuate noise and vibration (NVH) generated when a braking device is operated by having the plurality of impact bodies inelastically collide with the inner surfaces of the first and second disc plates.

2. In paragraph 1, The above-mentioned anchoring groove is, A crash brake disc assembly including a part formed with a predetermined length toward the center axis from the edge of the first disc plate.

3. In paragraph 2, The above collider is, A crash brake disc assembly comprising a plurality of mounting grooves arranged along the longitudinal direction of the mounting groove.

4. In paragraph 2, On the edges of the first and second disk plates, A collision brake disc assembly including a coupling ring that is coupled to prevent the collision body inserted into the above-mentioned mounting groove from being detached to the outside due to centrifugal force.

5. In paragraph 1, The above collider is, A crash brake disc assembly comprising a spherical shape.

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