DRUM BRAKE AND NOISE REDUCTION DEVICE FOR IT

Abstract

The present disclosure relates to a drum brake and a noise-canceling device for the drum brake. The drum brake is provided in a vehicle and comprises a brake drum designed for mounting on a wheel and including at least one bolt hole, and a noise-canceling device connected to one end of an axle shaft and configured to connect an axle flange, including at least one bolt hole, to the brake drum. Accordingly, vibrations of the axle shaft and the drum brake can be isolated to prevent squealing noises.

Description

STATE OF THE ART1. Area

[0001] Embodiments of the present disclosure relate to a drum brake for isolating noise and a noise suppression device of the drum brake. 2. State of the art

[0002] The squealing noise of a drum brake system is caused by a vibration interaction between a pad (a pad holder) and a drum. Then, all other components of the braking system and an axle system begin to vibrate. Due to an increase in friction, pressure, and temperature effects or changes, the entire system vibrates close to a certain frequency, but in different directions (phases). As a result of the interaction between the components in contact with each other, the system becomes unstable and produces a squealing noise. Consequently, unwanted sound waves diffuse due to the vibrations of components with large surfaces, such as a drum or pad. Consequently, a driver and people outside a vehicle hear the squealing noise.

[0003] Brake suppliers strive to develop a silent and robust braking system regardless of the axle.

[0004] The squealing noise is caused not only by axle components (a steering knuckle, suspension, upper control arm, lower control arm, stabilizer bar, and damper), but by all components, including brake components and brake drums. To separate the vibrations and natural frequencies of the axle system and the brake system, a region connecting the two systems must be considered. In other words, the need for stable braking systems, regardless of surrounding components such as drums and axles, is increasing.

[0005] From DE 20 06 293 A a device for vibration damping and noise reduction on disc and drum brakes is known, wherein a damping mass which carries out the rotational movement by frictional engagement is arranged on the rotating part of the brake, preferably in the area of ​​the rotating part which carries out the greatest vibration amplitudes. DEMOLITION

[0006] Accordingly, it is an aspect of the present disclosure to provide a drum brake capable of isolating vibrations of an axle shaft and a noise suppression device of the drum brake.

[0007] According to one aspect of the present disclosure, a drum brake provided in a vehicle includes a brake drum intended to be mounted on a wheel and including at least one bolt receiving hole, and a noise suppression device connected to one end of an axle shaft and configured to connect an axle flange including at least one bolt hole and the brake drum.

[0008] The noise suppression device may comprise a round damping disc having at least one connection hole and at least one cylindrical hollow ring structure configured to be inserted into the at least one screw receiving hole, wherein the at least one cylindrical hollow ring structure can be coupled to the at least one connection hole.

[0009] The round damping disc can be made of a metal layer.

[0010] The round damping disc can be made of a metal layer and a rubber layer.

[0011] The round damping disc can be formed from a metal layer, two surfaces of which are coated with rubber.

[0012] The round damping disc can be made of a metal layer, a rubber layer and a bonding layer.

[0013] The thickness of the metal layer can range from 0.6 mm to 1 mm.

[0014] The thickness of the rubber layer can range from 0.2 mm to 0.4 mm.

[0015] According to another aspect of the present disclosure, a noise suppression device of a drum brake is provided for connecting an axle flange and a brake drum, wherein the axle flange is connected to one end of the axle shaft and includes at least one bolt hole, and the brake drum is configured to be mounted on a wheel and includes at least one bolt receiving hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] These and / or other aspects of the disclosure will become apparent and more easily understood from the following description of the embodiments when considered in conjunction with the accompanying drawings, of which: Fig. 1 and Fig. 2 are views illustrating a connecting structure of a drum brake and an axle of a conventional vehicle; Fig. 3 is a view illustrating a connection structure of a drum brake, a noise suppression device, and an axle according to an embodiment; Fig. 4 is a view illustrating a drum brake incorporating a noise suppression device according to an embodiment; and Fig. 5 is a cross-sectional view illustrating the noise suppression device according to an embodiment. DETAILED DESCRIPTION

[0017] Throughout the description, like reference numerals denote like elements. Not all elements of the embodiments are described in the description, and common content of the prior art or content repeated between embodiments is also not described. Terms such as parts, modules, elements, and blocks may be implemented using software or hardware, and a plurality of parts, modules, elements, and blocks may be implemented in a single element, or a part, module, element, or block may also include a plurality of elements.

[0018] When the description states that a part is "connected" to another part, this includes being "directly connected" to another part, and being "indirectly connected" to another part includes being "connected" to another part via a wireless communications network.

[0019] Furthermore, where a part “includes” an element, it may also include another part rather than excluding the existence of another element, unless otherwise described.

[0020] If the description states that an element is "on" another element, the element is in contact with another element, or there is another element between the two elements.

[0021] Terms such as first, second, etc. are used here to distinguish one element from another, and the elements are not limited to the above terms.

[0022] When used in this document, the singular forms “a” and “an” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] Reference symbols in operations are used to clarify the description and do not describe a sequence of operations, and the operations may be performed in an order different from the described order unless the context clearly indicates a particular order.

[0024] In the following, operating principles and embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0025] The Fig. 1 and Fig. 2 are views illustrating a connection structure of a brake drum 200 and an axle for a conventional drum brake.

[0026] As in Fig. As illustrated in Figure 1, the vehicle includes a device for connecting an axle and a wheel. More specifically, a driving force from an engine can be transmitted to a wheel via an axle shaft 100, an axle flange 110, the brake drum 200, and a wheel 300, or a braking force can be transmitted via a pedal force of a pedal.

[0027] Referring to Fig. 2 describes the connection structure of the brake drum 200 and the axle of the conventional drum brake, wherein one end of the axle shaft 100 is connected to the axle flange 110. The axle flange 110 may include at least one bolt hole 111. According to one embodiment, the bolt hole 111 may be provided in the form of four or five bolt holes 111. However, the present disclosure is not limited to this, and the number of bolt holes 111 may vary according to a design.

[0028] A bolt 112 may be connected to the bolt hole 111 of the axle flange 110, and a length of the bolt 112 may be greater than a length of the bolt hole 111 so that the bolt 112 can be inserted into a bolt receiving hole (not shown) formed in an outer peripheral surface of the brake drum 200.

[0029] As described above, the connecting structure of the brake drum 200 and the axle of the conventional drum brake is a structure with which vibrations from the interaction of the brake system and an axle system are difficult to suppress.

[0030] Fig. 3 is a view illustrating a connection structure of a drum brake, a noise suppression device 150, and an axle according to an embodiment.

[0031] Referring to Fig. 3, the drum brake and the noise suppression device of the drum brake may be configured as follows. The connecting structure of the drum brake, the noise suppression device 150, and the axle may include the axle including an axle shaft 100 and an axle flange 110, a brake drum 200 of the drum brake, and the noise suppression device 150 connecting the axle flange 110 and the brake drum 200 to connect the axle and the drum brake.

[0032] One end of the axle shaft 100 is connected to the axle flange 110. The axle flange 110 may include at least one bolt hole 111. According to one embodiment, the bolt hole 111 may be provided in the form of four or five bolt holes 111. However, the present disclosure is not limited thereto, and the number of bolt holes 111 may vary according to a design.

[0033] A bolt 112 is connected to the bolt hole 111 of the axle flange 110, and a length of the bolt 112 is greater than the length of the bolt hole 111 so that the bolt 112 is inserted into a bolt receiving hole (not shown) formed in an outer peripheral surface of the brake drum 200.

[0034] The brake drum 200 is intended for mounting on a wheel 300 and may include at least one bolt receiving hole (not shown).

[0035] The noise suppression device 150 may include a damping disc 151 having at least one communication hole (not shown) and at least one cylindrical hollow ring structure 152.

[0036] The at least one cylindrical hollow ring structure 152 may be configured to be coupled to the at least one connection hole (not shown). Furthermore, the at least one cylindrical hollow ring structure 152 may be inserted into the at least one bolt receiving hole (not shown) provided in the brake drum 200. Accordingly, the bolt 112 passing through the bolt hole 111 of the axle flange 110 may be inserted into the cylindrical hollow ring structure 152 inserted into the bolt receiving hole (not shown).

[0037] According to one embodiment, the cylindrical, hollow ring structure 152 may be a hollow threaded ring structure. That is, an outer portion of the cylindrical, hollow ring structure 152 may be inserted into the screw-receiving hole (not shown) by screw rotation, and the screw 112 extending through the screw hole 111 may be inserted into an inner portion of the cylindrical, hollow ring structure 152 by screw rotation.

[0038] Due to such a double structure, the connecting structure can be made more rigid even when the axle and the drum brake are connected by the noise suppression device 150.

[0039] According to another embodiment, a noise suppression device 150 may include a round damping disc 151 having at least one connection hole (not shown). Accordingly, a bolt hole 111 of an axle flange 110 and a bolt 112 passing through the connection hole (not shown) may be inserted into a bolt receiving hole (not shown) of a brake drum 200. That is, the round damping disc 151 may be configured to have only at least one connection hole (not shown).

[0040] The number of screws 112, the number of screw holes 111, the number of connecting holes (not shown), the number of cylindrical hollow ring structures 152 and the number of screw receiving holes may be the same.

[0041] Fig. 4 is a view illustrating a drum brake including a noise suppression device 150 according to an embodiment.

[0042] Referring to Fig. 4, the drum brake may include a brake drum 200, at least one bolt receiving hole (not shown) provided in the brake drum 200, and the noise suppression device 150.

[0043] The noise suppression device 150 may include a round damping disc 151 having at least one connection hole (not shown) and at least one cylindrical, hollow ring structure 152 that can be inserted into at least one screw-receiving hole (not shown). The at least one cylindrical, hollow ring structure 152 may be coupled to the at least one connection hole (not shown).

[0044] According to one embodiment, the round damping disc 151 may be formed from a metal layer.

[0045] According to one embodiment, the round damping disc 151 may be formed from a metal layer and a rubber layer.

[0046] According to one embodiment, the round damping disc 151 may be formed from a metal layer, two surfaces of which are coated with rubber.

[0047] According to one embodiment, the round damping disc 151 may be formed from a metal layer, a rubber layer and a bonding layer.

[0048] According to one embodiment, a thickness of the metal layer may be in the range of 0.6 mm to 1 mm.

[0049] According to one embodiment, a thickness of the rubber layer may be in the range of 0.2 mm to 0.4 mm.

[0050] Fig. 5 is a cross-sectional view illustrating the noise suppression device 150 according to an embodiment.

[0051] Referring to Fig.5, the noise suppression device 150 may include a round damping disc 151 and at least one communication hole (not shown).

[0052] According to one embodiment, the noise suppression device 150 may further include at least one cylindrical hollow ring structure 152 that may be coupled to the at least one communication hole (not shown).

[0053] According to one embodiment, the round damping disc 151 may be formed from a metal layer.

[0054] According to one embodiment, the round damping disc 151 may be formed from a metal layer and a rubber layer.

[0055] According to one embodiment, the round damping disc 151 may be formed from a metal layer, two surfaces of which are coated with rubber.

[0056] According to one embodiment, the round damping disc 151 may be formed from a metal layer, a rubber layer and a bonding layer.

[0057] According to one embodiment, a thickness of the metal layer may be in the range of 0.6 mm to 1 mm.

[0058] According to one embodiment, the thickness of the rubber layer may be in the range of 0.2 mm to 0.4 mm.

[0059] According to one embodiment, the cylindrical hollow ring structure 152 may be a hollow threaded ring structure. That is, an outer portion of the cylindrical hollow ring structure 152 may be inserted into the screw-receiving hole (not shown) by screw rotation, and the screw 112 extending through the screw hole 111 may be inserted into an inner portion of the cylindrical hollow ring structure 152.

[0060] Due to such a double structure, a connecting structure can be made more rigid even when an axle and a drum brake are connected by the noise suppression device 150.

[0061] According to one aspect of the disclosure, a drum brake capable of isolating vibrations of an axle component and a drum brake component, and a drum brake noise suppression device may be provided.

[0062] Accordingly, the drum brake and the drum brake noise suppression device can prevent squeaking noises.

[0063] The above description is merely an example describing the technical nature of the present disclosure, and various changes, modifications, and substitutions can be made by a person skilled in the art without departing from the essential characteristics of the present disclosure. Therefore, the embodiments disclosed in the present disclosure are to be construed only in a descriptive sense and not for purposes of limitation, and the scope of the disclosure is not limited by the embodiments. It should be understood that the scope of the disclosure is defined by the appended claims and includes all modifications and equivalents falling within the scope of the appended claims.

Claims

[1] A drum brake provided in a vehicle, comprising: a brake drum (200) adapted to be mounted with a wheel (300) on an axle flange (110) connected to the axle shaft (100) at one end thereof, the brake drum (200) including at least one screw receiving hole; and a noise suppression device (150) comprising a damping disc (151) having at least one connection hole and at least one cylindrical, hollow ring structure (152) connected to the connection hole, wherein the hollow, cylindrical ring structure (152) is inserted into the screw receiving hole; and wherein the noise suppression device (150) is designed to connect the axle shaft (100) to the brake drum (200) by means of at least one screw (112) which can be inserted into at least one screw hole (111) in the axle flange (100) and the at least one connecting hole of the noise suppression device (150). [2] Drum brake according to claim 1, wherein the damping disc (151) is round. [3] Drum brake according to claim 2, wherein the round damping disc (151) is formed from a metal layer. [4] Drum brake according to claim 2, wherein the round damping disc (151) is formed from a metal layer and a rubber layer. [5] A drum brake according to claim 2, wherein the round damping disc (151) is formed of a metal layer, two surfaces of which are coated with rubber. [6] Drum brake according to claim 2, wherein the round damping disc (151) is formed from a metal layer, a rubber layer and a bonding layer. [7] Drum brake according to one of claims 3 to 6, wherein a thickness of the metal layer is in a range of 0.6 mm to 1 mm. [8] Drum brake according to one of claims 4 or 6, wherein a thickness of the rubber layer is in a range of 0.2 mm to 0.4 mm. [9] Noise suppression device (150) of a drum brake, wherein the noise suppression device (150) is provided to connect an axle flange (110) connected to the axle shaft (100) at one end thereof to a brake drum (200) comprising at least one screw receiving hole, the noise suppression device (150) comprising: a damping disc (151) having at least one connecting hole and at least one cylindrical, hollow ring structure (152) connected to the connecting hole, wherein the hollow, cylindrical ring structure (152) is adapted to be inserted into the screw receiving hole, and wherein the noise suppression device (150) is designed to connect the axle shaft (100) to the brake drum (200) by means of at least one screw (112) which can be inserted into at least one screw hole (111) in the axle flange (100) and the at least one connecting hole of the noise suppression device (150). [10] Noise suppression device (150) according to claim 9, wherein the damping disc (151) is round. [11] The noise suppression device (150) according to claim 10, wherein the round damping disc (151) is formed from a metal layer. [12] The noise suppression device (150) according to claim 10, wherein the round damping disc (151) is formed of a metal layer and a rubber layer. [13] The noise suppression device (150) according to claim 10, wherein the round damping disc (151) is formed of a metal layer, two surfaces of which are coated with rubber. [14] The noise suppression device (150) according to claim 10, wherein the round damping disc (151) is formed of a metal layer, a rubber layer and a bonding layer. [15] The noise suppression device (150) according to any one of claims 11 to 14, wherein a thickness of the metal layer is in a range of 0.6 mm to 1 mm. [16] The noise suppression device (150) according to any one of claims 12 or 14, wherein a thickness of the rubber layer is in a range of 0.2 mm to 0.4 mm.

Images