KR102616343B1 - Electric brake system - Google Patents

Abstract

An electronic brake system of the present invention is disclosed. According to one aspect of the present invention, a hydraulic block is provided with a master cylinder and has a plurality of passages and valves for controlling braking hydraulic pressure, and a hydraulic block coupled to the hydraulic block to generate hydraulic pressure according to the pedal force of the brake pedal. In an electronic brake system including a hydraulic pressure generator and a reservoir coupled to the hydraulic block and having a plurality of oil ports for supplying oil, each coupling portion formed in the plurality of oil ports is provided with a device to prevent oil leakage. An electronic brake system may be provided in which a sealing member is installed, and at least one of the sealing members is provided such that two or more flow paths are formed.

Description

Electronic brake system {Electric brake system}

The present invention relates to an electronic brake system, and more specifically, to an electronic brake system that can reduce the number of parts of the brake system and reduce the size of the product.

Vehicles are essentially equipped with a brake system for braking, and recently, various types of systems have been proposed to achieve stronger and more stable braking force. As an example, an intelligent integrated brake (IDB: Integrated Dynamic Brake) system is being proposed. The IDB system is proposed to generate stable and powerful braking force by integrating a master booster and electronic stability control (ESC).

For example, an electronic brake system is disclosed in European patent registration EP 2520473. According to the disclosed literature, the electronic brake system includes a hydraulic pressure generator that outputs the operation of the brake pedal as an electrical signal through a pedal displacement sensor to operate a motor and converts the rotational force of the motor into linear motion to generate braking hydraulic pressure, and the hydraulic pressure It includes a hydraulic block equipped with a plurality of valves to control braking operations by receiving hydraulic pressure with the force generated by the generator, a pedal simulator that provides reaction force to the pedal, and an electronic control unit that controls the motor and valves.

This electronic brake system is provided to supply oil to each hydraulic chamber of the master cylinder provided in the hydraulic block and to the hydraulic pressure generator or pedal simulator through a reservoir in which oil is stored. More specifically, the reservoir is provided with two oil ports to supply oil to the first and second hydraulic chambers of the master cylinder. This oil port is combined with the connection port formed on the hydraulic block to provide oil to the master cylinder. Additionally, a sealing member to prevent oil leakage is installed in each oil port, and this sealing member is coupled to the oil port to form only one flow path. In addition, in order to supply oil to the hydraulic pressure generator and/or pedal simulator, an oil port must be separately processed in the reservoir.

However, in the case of the electronic brake system, when a reservoir with at least three oil ports is connected to the hydraulic block to supply oil, it is difficult to secure space to install the oil ports and sealing members as the product is miniaturized, and the structure becomes complicated. There is.

In addition, since a sealing member must be installed in each oil port, the number of parts increases and the product price increases.

European registered patent EP 2520473 (Honda Motor Co., Ltd) 2011. 2. 23.

The electronic brake system according to an embodiment of the present invention is advantageous in securing space for installing the oil port and sealing member by forming a plurality of flow paths in the sealing member installed in the oil port of the reservoir, and the product price is reduced by reducing the number of parts. Make it possible to reduce it.

According to one aspect of the present invention, a hydraulic block is provided with a master cylinder and has a plurality of passages and valves for controlling braking hydraulic pressure, and a hydraulic block that is coupled to the hydraulic block to generate hydraulic pressure according to the pedal pressure of the brake pedal. In an electronic brake system including a generator and a reservoir coupled to the hydraulic block and equipped with a plurality of oil ports for supplying oil, each coupling portion formed in the plurality of oil ports is provided with a seal to prevent oil leakage. An electronic brake system may be provided in which a member is installed, and at least one of the sealing members is provided such that two or more flow paths are formed.

Additionally, the hydraulic block may be provided with a plurality of connection ports at positions corresponding to the oil ports, and the plurality of connection ports may be formed on the same surface of the hydraulic block.

Additionally, in the hydraulic block at a position where the sealing member in which the two or more flow paths are formed is coupled to the oil port, flow paths communicating with the two or more flow paths may be formed at positions corresponding to the two or more flow paths.

In addition, the sealing member having two or more flow paths may include a cylindrical body portion whose upper and lower portions are open and a flow path is formed therein; and a partition wall formed to divide the flow path within the body into two or more flow paths in the longitudinal direction.

Additionally, protrusions may be formed on the inner peripheral surface of the body portion and the partition wall portion in directions facing each other.

In addition, the partition wall portion is provided so that one end is integrally formed and the other end is spaced apart, so that a support groove may be formed between the spaced apart partition wall portions.

Additionally, the coupling portion may be coupled in close contact between the inner peripheral surface of the body portion and each partition wall portion.

Additionally, the sealing member may be made of a rubber material.

The electronic brake system according to an embodiment of the present invention forms two or more flow paths in a sealing member installed in the oil port of the reservoir, thereby enabling connection to a plurality of parts to which oil is supplied through one oil port. Accordingly, there is an effect of lowering the price of the product by reducing the number of parts.

In addition, there is an advantage in that a connection port connected to a plurality of oil ports of the reservoir can be formed on the same side of the hydraulic block, making it advantageous to secure space for installing the oil port and sealing member. This has the effect of miniaturizing the product.

The present invention will be explained in detail with the drawings below, but since these drawings show preferred embodiments of the present invention, the technical idea of the present invention should not be construed as limited to the drawings.
1 is a perspective view briefly showing an electronic brake system according to an embodiment of the present invention.
Figure 2 is a plan view showing a hydraulic block of an electronic brake system according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing a combined state of an oil port formed in the reservoir of an electronic brake system according to an embodiment of the present invention and a sealing member.
Figure 4 is a cross-sectional view showing a combined state of an oil port formed in the reservoir of an electronic brake system according to another embodiment of the present invention and a sealing member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the idea of the present invention to those skilled in the art. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. In order to clarify the present invention, the drawings may omit illustrations of parts unrelated to the description and may slightly exaggerate the sizes of components to aid understanding.

Figure 1 is a perspective view briefly showing an electronic brake system according to an embodiment of the present invention, and Figure 2 is a plan view showing a hydraulic block of the electronic brake system.

Referring to Figures 1 and 2, the electronic brake system 1 includes a hydraulic block 20 in which a master cylinder 10 is installed and a plurality of passages and valves for controlling the braking hydraulic pressure are provided, and the hydraulic block A hydraulic pressure generator (30) coupled to (20) to generate hydraulic pressure according to the pedal force of the brake pedal (not shown), and an electronic control that controls the hydraulic pressure generator (30) and valves based on hydraulic pressure information and pedal displacement information. It is coupled to the unit 40 and the hydraulic block 20 and includes a reservoir 50 equipped with a plurality of oil ports (see '52' in FIG. 3) for supplying oil. Meanwhile, although not shown, a pedal simulator that provides reaction force to the brake pedal may be installed in the hydraulic block 20.

The master cylinder 10 is installed within the hydraulic block 20 and is provided with two hydraulic chambers (not shown). This is generally to ensure safety by operating the remaining hydraulic chamber when one of the hydraulic chambers of the master cylinder 10 breaks down and providing braking hydraulic pressure to the wheel cylinders installed on each wheel.

The hydraulic pressure generator 30 is designed to operate by receiving the driver's intention to brake as an electrical signal from a pedal displacement sensor (not shown) that detects the displacement of the brake pedal according to the pedal pressure. That is, the hydraulic pressure generated from the hydraulic pressure generator 30 is transmitted to the wheel cylinder installed on each wheel to generate braking force. At this time, the valves provided in the hydraulic block 20 are controlled to control the flow of hydraulic pressure delivered to the wheel cylinder.

The hydraulic block 20 of the electronic brake system 1 as described above is coupled with a master cylinder 10, a hydraulic pressure generator 30, and a reservoir 50 in which oil is stored to supply oil to the pedal simulator. In this embodiment, three oil ports (see '52' in FIG. 3) are formed in the reservoir 50 and are shown to be coupled to the hydraulic block 20, but this is not limited to this, and the connection structure of the parts or the user's request is not limited to this. It should be understood that it can be selectively changed depending on.

As shown in FIG. 2, three connection ports 22 connected to the oil port of the reservoir 50 (see '52' in FIG. 3) are formed in the hydraulic block 20. This connection port 22 is formed on the same surface of the hydraulic block 20. This not only ensures ease of assembly by forming a plurality of connection ports 22 on the same mating surface as the oil port 52, which is essentially connected to supply oil to the master cylinder 10, but also has a simple structure. This is because securing space for installing the oil port 52 is advantageous.

Among the three connection ports 22, two connection ports 22 are connected to the two hydraulic chambers formed in the master cylinder 10, and the remaining connection port 22 is connected to the hydraulic pressure generator 30 and/or Can be connected to a pedal simulator.

A plurality of oil ports 52 are formed in the reservoir 50 at positions corresponding to the plurality of connection ports 22. More specifically, referring to FIG. 3, a sealing member 60 to prevent oil leakage is installed at each coupling portion 53 formed in the plurality of oil ports 52. At this time, two or more flow paths 62 may be formed in at least one sealing member 60 among the plurality of sealing members 60 . Here, the oil port 52 is typically formed to have one flow path, and a sealing member coupled to the oil port 52 is also used to form one flow path. That is, according to one aspect of the present invention, at least two flow paths 62 are formed in the sealing member as described above, thereby making it possible to connect two or more parts through one sealing member 60. At this time, the hydraulic block 20 at a position where the sealing member 60 having the two or more flow paths 62 is coupled to the oil port 52 is provided with the two or more flow paths 62 at a position corresponding to the two or more flow paths 62. A flow path (not shown) communicating with (62) is formed.

More specifically, the sealing member 60 has a body portion 61 with a flow path formed therein so that the coupling portion 53 of the oil port 52 is inserted, and two or more flow paths within the body portion 61 in the longitudinal direction. It is provided with a partition wall portion (63) formed to partition it into a flow path (62).

The body portion 61 is formed to have a cylindrical shape with the upper and lower portions open and a flow path formed therein.

The partition wall portion 63 is formed integrally with the body portion 61 and serves to divide the flow path within the body portion 61 into two or more flow paths 62. The number of partition walls 63 connected to a portion of the inner surface in the longitudinal direction of the body 61 divides the passage into a plurality of passages. For example, if the partition 63 has an 'I' shape in plan, it is divided into two flow paths 62, and if the partition 63 has a '+' shape in plan, it is divided into four flow paths. I do it. That is, as shown, the sealing member 60 is shown as having two flow paths 62, but it is not limited to this, and three or more flow paths can be formed depending on the formation structure of the partition wall portion 63. .

The coupling portion 53 of the oil port 52 coupled to the sealing member 60 communicates with the inside of the reservoir 50 and is provided to be inserted into the connection port 22 together with the sealing member 60. Accordingly, the coupling portion 53 is tightly coupled between the inner peripheral surface of the body portion 61 and each partition wall portion 63. That is, the coupling portion 53 is formed to be coupled to each passage 62 formed in the sealing member 60. As shown in FIG. 3, a pair of coupling portions 53 are respectively inserted into and coupled to the sealing member 60 in which the two flow paths 62 are formed, so that each coupling portion is coupled by the body portion 61 and the partition wall portion 63. Oil leakage through the unit 53 can be prevented. This sealing member 60 is made of a rubber material.

Meanwhile, in order to ensure tight coupling and effectively prevent oil leakage when the sealing member 60 and the coupling portion 53 are coupled, protrusions 65 are formed on the inner peripheral surface of the body portion 61 and the partition wall portion 63 in directions facing each other. ) is formed. Accordingly, when the sealing member 60 and the coupling portion 53 are coupled, the protrusion 65 is pressed by the coupling portion 53 and is elastically deformed, thereby increasing the coupling force.

Figure 4 is a cross-sectional view showing a combined state of an oil port formed in the reservoir of an electronic brake system according to another embodiment of the present invention and a sealing member. Here, the same reference numbers as in the previously shown drawings indicate members performing the same function.

Referring to FIG. 4, the sealing member 60' includes a body portion 61 and a partition wall portion 63'. At this time, the partition wall portion 63' is composed of a plurality of partitions, with one end provided integrally and the other ends spaced apart. Accordingly, a support groove 64' is formed between the spaced apart partition walls 63'. The coupling portion 53 of the oil port 52 coupled to the sealing member 60' having this structure is coupled to fit into the inner peripheral surface of the body portion 61 and the support groove 64'. That is, the coupling portion 53 has a support portion 54 fitted into the support groove 64', and the support portion 54 is provided to support a plurality of neighboring partition walls 63', thereby forming the body portion 61 and the Oil leakage can be prevented by the partition wall portion 63'.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the patent claims to be described.

1: Electronic brake system 10: Master cylinder
20: hydraulic block 22: connection port
30: Hydraulic pressure generator 40: Electronic control unit
50: reservoir 52: oil port
53: coupling part 54: support part
60, 60': sealing member 61: body part
63, 63': partition wall 65: protrusion part

Claims (8)

A hydraulic block equipped with a master cylinder and equipped with a plurality of passages and valves for controlling braking hydraulic pressure, a hydraulic pressure generator coupled to the hydraulic block to generate hydraulic pressure according to the pedal force of the brake pedal, and a hydraulic block connected to the hydraulic block. In an electronic brake system that is coupled and has a reservoir equipped with a plurality of oil ports for supplying oil,
A sealing member to prevent oil leakage is installed at each coupling portion formed in the plurality of oil ports,
At least one of the sealing members is provided to form two or more flow paths,
The sealing member in which the two or more flow paths are formed,
A cylindrical body portion with the upper and lower portions open and a flow path formed therein; and
An electronic brake system comprising: a partition formed to divide the passage within the body into two or more passages in the longitudinal direction. According to paragraph 1,
The hydraulic block is provided with a plurality of connection ports at positions corresponding to the oil ports, and the plurality of connection ports are formed on the same surface of the hydraulic block. According to paragraph 1,
An electronic brake system in which flow paths communicating with the two or more flow paths are formed at positions corresponding to the two or more flow paths in a hydraulic block at a position where the sealing member having the two or more flow paths is installed. delete According to paragraph 1,
An electronic brake system in which protrusions are formed on the inner peripheral surface of the body and the partition wall in directions facing each other. According to paragraph 1,
An electronic brake system in which one end of the partition wall is integrally formed and the other end is spaced apart, and a support groove is formed between the spaced partition walls. According to paragraph 1,
The coupling portion is an electronic brake system in which the coupling portion is tightly coupled between the inner peripheral surface of the body portion and each partition wall portion. According to paragraph 1,
An electronic brake system in which the sealing member is made of a rubber material.

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