Braek pedal apparatus and vehicle having the same

Abstract

The disclosed embodiment relates to a brake pedal device and a vehicle equipped with the same, wherein a pedal part (200) operated by a driver and a brake master cylinder (300) that generates brake hydraulic pressure are provided together in a single case (100), and the brake master cylinder (300) is installed so as to be arranged in a left-right direction perpendicular to the operating direction of the pedal part (200), and the pedal part (200) is configured to be an organ-type pedal, so that the external size of the brake pedal device can be configured to be a compact size and can be effectively applied to a small vehicle.

Description

Technology Field

[0001] The disclosed embodiment relates to a brake pedal device and a vehicle equipped with the same, and more specifically, to a brake pedal device in which a pedal part operated by a driver and a brake master cylinder that generates brake hydraulic pressure are provided together in a single case, and to a vehicle equipped with the same. Background Technology

[0002] The vehicle may be equipped with a brake pedal operated by the driver for braking.

[0003] Brake pedals are classified into pendant type and organ type depending on the mounting structure.

[0004] In the pendant type, the center of rotation of the pedal pad is located at the top, allowing the driver to operate it by pressing or pushing it forward, while in the organ type, the center of rotation of the pedal pad is located at the bottom, allowing the driver to operate it by rotating the pedal pad forward.

[0005] In the case of a mechanical braking system, the driver's pedal pad operation force is transmitted to the brake master cylinder to generate brake hydraulic pressure, and the generated brake hydraulic pressure is transmitted to the braking devices on the front and rear wheels to generate braking force on the front and rear wheels.

[0006] In general, small vehicles (small electric vehicles) that are small in size and have limited interior space may find it difficult to individually secure mounting space for the brake pedal device and the brake master cylinder.

[0007] Therefore, it is necessary to develop a new type of brake pedal device that can be effectively applied to small vehicles.

[0008] The matters described as background technology above are intended only to enhance understanding of the background of the disclosed embodiments and should not be construed as an acknowledgment that they constitute prior art already known to those skilled in the art. The problem to be solved

[0009] The disclosed embodiment is a brake pedal device in which a pedal part operated by a driver and a brake master cylinder that generates brake hydraulic pressure are provided together in a single case, and the external size can be configured in a compact size and effectively applied to small vehicles, thereby aiming to improve productivity and marketability. means of solving the problem

[0010] A brake pedal device according to a disclosed embodiment for achieving the above-mentioned purpose comprises: a case fixedly installed on a vehicle panel; a pedal portion rotatably installed on the case and operated by a driver; and a brake master cylinder fixedly installed within the case, which operates by transmitting operating force through the pedal portion and generates brake hydraulic pressure upon operation; wherein the brake master cylinder is installed within the case so as to be arranged in a left-right direction perpendicular to the operating direction of the pedal portion.

[0011] It is characterized by further including a power transmission unit located within the above case and arranged in the left-right direction, which connects the pedal unit and the brake master cylinder to transmit the driver's pedal operation force to the brake master cylinder.

[0012] The above pedal part is characterized as an organ-type pedal that operates by rotating back and forth relative to the case, centering on the other end located inside the case, when the driver steps on the end protruding upward from the case with their foot.

[0013] The above pedal unit is characterized by comprising: a pedal pad operated by a driver; and a pedal arm installed through the upper surface of the case, one end of which is coupled to the pedal pad outside the case, and the other end of which is coupled to a power transmission unit installed inside the case so as to be rotatable relative to the case.

[0014] The first nipple and the second nipple connected to the brake oil reservoir tank in the above brake master cylinder are characterized by being provided to penetrate the front of the case and be exposed to the outside.

[0015] The first port and the second port connected to the front wheel braking device and the rear wheel braking device in the above brake master cylinder are characterized by being provided to be exposed to the outside by penetrating the front of the case.

[0016] The power transmission unit comprises: a cam bracket fixedly installed and spaced apart in the left-right direction within the case; a barrel cam rotatably installed on the cam bracket, coupled to a pedal unit, and having a spiral guide groove formed on its outer surface extending in the longitudinal direction; and a master cylinder rod, one end of which is inserted into the guide groove and moves along the guide groove when the barrel cam rotates, is bent at a predetermined angle and extends in the longitudinal direction of the brake master cylinder, and the other end of which is connected to the brake master cylinder.

[0017] The above brake master cylinder and barrel cam are characterized by being spaced apart in the front-rear direction, extending left and right, and arranged parallel to each other.

[0018] It is characterized by the fact that when the pedal part and barrel cam rotate due to driver operation, one end of the master cylinder rod moves along the guide groove, causing the master cylinder rod to move linearly, and during the linear movement of the master cylinder rod, the brake master cylinder is compressed to generate brake hydraulic pressure.

[0019] The above pedal part is characterized by the fact that when the front surface of the pedal part contacts a case hole formed in the case when the pedal part rotates forward relative to the case by the driver's operation, the operation stroke of the pedal part is restricted.

[0020] It is characterized by further including: a spring seat located within the case and coupled to the pedal part; a spring block located within the case and fixed to the case; and a return spring installed with both ends supported by the spring seat and the spring block, which returns the pedal part by spring force.

[0021] The above master cylinder rod is provided with a rod projection protruding therefrom; the above spring block is provided with a block projection protruding in a direction toward the master cylinder rod; and when the above pedal part performs a return motion by the spring force of the return spring, the return stroke of the pedal part is regulated when the rod projection contacts the block projection.

[0022] The invention is further characterized by including: a brake light switch fixedly coupled to the above case; a stopper bracket provided to be connected to the above pedal part; and a stopper fixedly provided to the above stopper bracket, which contacts the brake light switch when the driver does not operate the pedal part, and separates from the brake light switch when the driver operates the pedal part.

[0023] The upper rear surface of the above case is characterized by being formed as an inclined surface with a predetermined slope so that it can be used as a footrest surface on which a driver can rest their foot.

[0024] The barrel cam is formed in a cylindrical shape, and hinge projections protruding from both left and right ends are rotatably coupled to a cam bracket; and when the pedal part rotates, the barrel cam coupled to the pedal part rotates relative to the cam bracket fixed to the case.

[0025] The barrel cam is formed with a spiral guide groove extending in the longitudinal direction; one end of a master cylinder rod is inserted into the guide groove; and the one end of the master cylinder rod is formed as a circular sphere.

[0026] The vehicle of the disclosed embodiment comprises a case installed in a vehicle panel section, a pedal section and a brake master cylinder installed together in the case, wherein the brake master cylinder is a brake pedal device installed to be arranged in a left-right direction perpendicular to the operating direction of the pedal section; and a braking device located on the wheel of the vehicle and generating braking force when the brake pedal device is operated. Effects of the invention

[0027] The brake pedal device according to the disclosed embodiment is configured such that a pedal part operated by a driver and a brake master cylinder that generates brake hydraulic pressure are provided together in a single case, allowing the external size of the brake pedal device to be configured in a compact size and effectively applicable to small vehicles, thereby enabling improved productivity and marketability.

[0028] In addition, the brake master cylinder is configured to be installed within the case in a left-right direction perpendicular to the operating direction of the pedal section. This allows the front-to-rear length of the brake pedal device to be reduced, making it effective for application in small vehicles with limited front space.

[0029] In addition, the disclosed embodiment is configured such that the pedal part is an organ-type pedal, which has an advantageous effect for pedal operation when applied to a small vehicle with a high seating position in the driver's seat.

[0030] The effects obtainable from the disclosed embodiments are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the disclosed embodiments belong from the description below. Brief explanation of the drawing

[0031] FIGS. 1 and 2 are perspective views of the combined state of a brake pedal device according to a disclosed embodiment, Fig. 3 is an exploded view of Fig. 1, FIGS. 4 to 7 are drawings of the assembly process of a brake pedal device. FIG. 8 is an enlarged view of the area where the return spring is installed. FIGS. 9 to 12 are drawings of the state before the driver operates the pedal unit. FIGS. 13 to 16 are drawings of the state in which the driver operates the pedal part. Specific details for implementing the invention

[0032] In describing the embodiments disclosed in this specification, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the embodiments disclosed in this specification. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of this disclosure. The disclosure below is not intended to limit this disclosure to the described form or specific field, and it is considered that various alternative modes and modifications to this disclosure are possible, whether explicitly stated or implied in this specification. Those skilled in the art will recognize that the form and details of this disclosure may change.

[0033] The present disclosure is described with reference to specific embodiments. However, as understood by those skilled in the art to which the present disclosure pertains, the various embodiments disclosed herein may be modified or otherwise implemented in various other ways without departing from the spirit and scope of the present disclosure. Accordingly, the following description should be considered illustrative and is intended to teach those skilled in the art to the manner in which various embodiments are made and used. It will be understood that the forms of the disclosure shown and described herein are to be taken as representative embodiments. Equivalent elements, or materials, processes, or steps may be substituted for those representatively exemplified and described in the present disclosure. Expressions used in describing the present disclosure, such as "including," "comprising," "incorporating," "consisting of," "have," "is," etc., should be interpreted as allowing items, components, or elements not explicitly described to be indicated in a non-exclusive manner, i.e., to be indicated. In addition, references to the singular should be interpreted as including those related to the plural.

[0034] Furthermore, the various embodiments disclosed herein should be accepted as illustrative and descriptive and should not be interpreted as limiting the content of the disclosure. All references to joining (e.g., attached, affixed, coupled, connected, etc.) are used solely to aid in understanding the disclosure and are not intended to limit the location, orientation, or use of the configuration or the methods disclosed herein. Accordingly, where joining references exist, they should be interpreted broadly. Moreover, in such joining references, it is not assumed that two or more elements are directly connected to each other. Additionally, all numeric terms, e.g., "first," "second," "third," "primary," "secondary," "major," or any other general or numeric terms, are to be taken solely as identifiers to aid in understanding the various components, forms, variations, or modifications of the present disclosure and are not to imply any limitation to any component, form, variation, or modification, or to any order or preference thereof. That is, while such expressions may be used to describe various components, the components are not limited by such expressions. Such expressions are used solely for the purpose of distinguishing one component from another.

[0035] The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification, and do not inherently possess distinct meanings or roles.

[0036] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0037] Furthermore, the terms "Unit" or "Control Unit" included in the name are merely terms widely used to name controllers that control specific vehicle functions, and do not refer to generic function units.

[0038] A controller may include a communication device that communicates with other controllers or sensors to control the function it is responsible for, a memory that stores an operating system, logic instructions, and input / output information, and one or more processors that perform judgments, calculations, decisions, etc., necessary for controlling the function it is responsible for.

[0039] Any number of components or various components in any configuration described herein may be included within the disclosure described herein. Components may include any combination of features described herein and may be arranged in any configuration among the various configurations described herein. Concepts regarding the structure and arrangement of the components of the disclosure, as well as their use and operation, may be applied to any number of embodiments in any combination, as well as to specific embodiments discussed herein. Embodiments including those having various features of various arrangements are described below with reference to the drawings.

[0040] Hereinafter, various embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components are given the same reference number regardless of the drawing symbols, and redundant descriptions thereof will be omitted.

[0041] A brake pedal device according to a disclosed embodiment may include: a case (100) fixedly installed on a vehicle panel part (10) as shown in FIGS. 1 to 16; a pedal part (200) rotatably installed in the case (100) and operated by a driver; a brake master cylinder (300) fixedly installed within the case (100), which operates by transmitting operating force through the pedal part (200) and generates brake hydraulic pressure when operated; and a power transmission part (400) located within the case (100) and arranged in a left-right direction, which connects the pedal part (200) and the brake master cylinder (300) to transmit the operating force of the driver's pedal part (200) to the brake master cylinder (300).

[0042] The brake pedal device according to the disclosed embodiment is configured such that a pedal part (200) operated by a driver and a brake master cylinder (300) that generates brake hydraulic pressure are provided together in a single case (100). This allows the external size of the brake pedal device to be configured in a compact size, thereby providing the advantage of being effectively applicable to small vehicles.

[0043] The case (100) may be composed of a first case (110) at the front and a second case (120) at the rear, and the first case (110) and the second case (120) may be assembled via a plurality of first pins (130).

[0044] The case (100) is fixedly installed on the panel section (10) of the vehicle, for example, the panel section (10) can be a floor panel and can be installed in the interior space of the vehicle where the driver's seat is located.

[0045] According to the disclosed embodiment, the brake master cylinder (300) is configured to be installed within the case (100) in a left-right direction that is perpendicular to the operating direction (rotational direction, front-rear direction) of the pedal part (200). This allows the front-rear length (L1) of the brake pedal device to be reduced, thereby enabling effective application to small vehicles with limited front space and maximizing package usability.

[0046] The pedal part (200) can be an organ-type pedal that operates by rotating back and forth relative to the case (100) around the other end (bottom) located inside the case (100) when the driver steps on the upper end (top) protruding from the top of the case (100) with their foot.

[0047] The organ-type pedal has the advantage of good operability because the movement of the pedal part (200) and the trajectory of the driver's foot are similar, and it is particularly advantageous to operate compared to the pendant-type pedal when the seating position of the driver's seat is high.

[0048] The pedal unit (200) may include a pedal pad (210) operated by a driver stepping on it with their foot; and a pedal arm (220) that is installed through the upper surface of the case (100), one end of which is coupled to the pedal pad (210) outside the case (100), and the other end of which is coupled to a power transmission unit (400) that is rotatably installed with respect to the case (100) inside the case (100).

[0049] The pedal arm (220) penetrates the upper surface of the case (100) and protrudes to the outside of the case (100), and one end (upper end) of the pedal arm (220) protruding to the outside of the case (100) is connected to the pedal pad (210) via the second pin (230).

[0050] A case hole (140) that allows a pedal arm (220) to pass through the upper surface of the case (100) and to allow rotation of the pedal arm (220) in the forward and backward directions may be formed to extend in the forward and backward directions.

[0051] The lower end of the pedal arm (220) can be fixedly connected to the power transmission unit (400) via the third pin (240) in the internal space of the case (100).

[0052] That is, the lower end of the pedal arm (220) can be fixedly connected to the barrel cam (420) constituting the power transmission unit (400) via a plurality of third pins (240).

[0053] The first nipple (310) and the second nipple (320) connected to the brake oil reservoir tank (20) in the brake master cylinder (300) can be exposed to the outside by penetrating the front of the case (100).

[0054] The first nipple (310) and the second nipple (320) are provided with the same directionality in the brake master cylinder (300) and are structured to penetrate the front of the case (100) together, that is, they are structured to penetrate the front of the first case (110), and through this, they can contribute to realizing a compact size of the brake pedal device.

[0055] A reservoir hose is connected to each of the first nipple (310) and the second nipple (320) so that they can be connected to the brake oil reservoir tank (20) through the reservoir hose.

[0056] Additionally, the first port (330) and the second port (340), which are connected to the front wheel braking device (30) and the rear wheel braking device (40) in the brake master cylinder (300), may be provided to be exposed to the outside by penetrating the front of the case (100).

[0057] The braking device may be located on the wheels of the vehicle and may include a brake caliper for a disc brake and a wheel cylinder for a drum brake.

[0058] In the case of a small three-wheeled vehicle, the first port (330) can be connected to the front wheel, and the second port (340) can be connected to the rear wheel.

[0059] In the case of a four-wheel vehicle, the first port (330) is connected to the front left wheel (FL) and the rear right wheel (RR), and the second port (340) can be connected to the front right wheel (FR) and the rear left wheel (RL).

[0060] The first port (330) and the second port (340) are provided with the same directionality in the brake master cylinder (300) and are structured to penetrate the front of the case (100) together, that is, they are structured to penetrate the front of the first case (110), and through this, they can contribute to realizing a compact size of the brake pedal device.

[0061] Hydraulic hoses are connected to the first port (330) and the second port (340), respectively, so that brake hydraulic pressure can be transmitted to the front wheel braking device (30) and the rear wheel braking device (40), respectively, through the hydraulic hoses.

[0062] The first nipple (310) and the second nipple (320) may be arranged in a left-right direction and penetrate the front of the first case (110), and the first port (330) and the second port (340) may be arranged in a left-right direction below the first nipple (310) and the second nipple (320) and penetrate the front of the first case (110).

[0063] The power transmission unit (400) may include a pair of cam brackets (410) fixedly installed spaced apart in the left and right directions within the case (100); a barrel cam (420) rotatably installed on the cam brackets (410), coupled with a pedal unit (200), and having a spiral guide groove (421) formed on its outer surface extending in the longitudinal direction; and a master cylinder rod (430) having one end inserted into the guide groove (421) and moving along the guide groove (421) when the barrel cam (420) rotates, and being bent at a predetermined angle to extend in the longitudinal direction of the brake master cylinder (300), with the other end connected to the brake master cylinder (300).

[0064] The cam bracket (410) is composed of two, and the two cam brackets (410) can be installed to be fixed via a plurality of fourth pins (440) at positions spaced apart from each other on the bottom of the second case (120).

[0065] The barrel cam (420) is formed in a cylindrical shape, and hinge protrusions (422) protrude from both the left and right ends, and the hinge protrusions (422) can be rotatably connected to the cam bracket (410).

[0066] The lower end of the pedal arm (220) can be fixedly connected to the barrel cam (420) via a plurality of third pins (240).

[0067] Accordingly, as the driver operates the pedal pad (210) by stepping on it with their foot, the pedal arm (220) rotates, and the barrel cam (420) coupled to the pedal arm (220) rotates relative to the cam bracket (410) fixed to the case (100).

[0068] A spiral guide groove (421) is formed in the barrel cam (420) so as to extend in the longitudinal direction, and one end of the master cylinder rod (430) can be inserted into the guide groove (421).

[0069] When the barrel cam (420) rotates, one end of the master cylinder rod (430) inserted into the guide groove (421) can move along the guide groove (421).

[0070] One end of the master cylinder rod (430) can be formed into a circular sphere (431) so that it can move smoothly along the guide groove (421).

[0071] The master cylinder rod (430) is formed in an L shape, so that one end of the sphere (431) is inserted into the guide groove (421) of the barrel cam (420), and the other end is extended in the longitudinal direction of the brake master cylinder (300) and can be connected to the brake master cylinder (300).

[0072] The brake master cylinder (300) can be fixedly installed by being positioned in the left and right directions within the second case (120) via a plurality of fifth pins (350).

[0073] According to the disclosed embodiment, the brake master cylinder (300) and the barrel cam (420) can be spaced apart in the front-rear direction and extended left-right while being arranged parallel to each other, thereby contributing to the realization of a compact size of the brake pedal device.

[0074] A brake pedal device according to the disclosed embodiment may further include: a spring seat (510) located within a case (100) and coupled to a pedal portion (200); a spring block (520) located within the case (100) and fixed to the case (100); and a return spring (530) installed so that both ends are supported by the spring seat (510) and the spring block (520) and returns the pedal portion (200) by spring force.

[0075] The spring seat (510) can be fixedly coupled to the pedal arm (220) within the case (100) via the sixth pin (540).

[0076] The spring block (520) can be installed so as to be fixed to the inner bottom of the first case (110) via the seventh pin (550).

[0077] The return spring (530) serves to return the pedal arm (220) by spring force and can be composed of, for example, a coil spring.

[0078] When the driver operates the pedal pad (210) and the pedal arm (220) rotates forward, the return spring (530) is compressed, and when the driver's operating force is released from the pedal pad (210) while the pedal arm (220) is rotated forward, the pedal arm (220) can return to its initial position by the spring force of the return spring (530).

[0079] According to the disclosed embodiment, when the pedal part (200) rotates forward relative to the case (100) by operation of the driver, if the front surface of the pedal part (200) comes into contact with the case hole (140) formed in the case (100), the operation stroke of the pedal part (200) can be restricted.

[0080] That is, when the driver operates the pedal pad (210) and the pedal arm (220) rotates forward, if the front surface of the pedal arm (220) comes into contact with the front surface of the case hole (140), the stroke during operation of the pedal part (200) can be restricted.

[0081] According to the disclosed embodiment, the master cylinder rod (430) may be provided with a rod projection (432) protruding therefrom, and the spring block (520) may be provided with a block projection (521) protruding in a direction toward the master cylinder rod (430).

[0082] The rod protrusion (432) can be formed to protrude radially from the master cylinder rod (430) and be connected to a circular ring along the circumferential direction of the master cylinder rod (430).

[0083] Accordingly, when the pedal part (200) returns to the starting position using the spring force of the return spring (530), if the rod projection (432) comes into contact with the block projection (521), the return stroke of the pedal part (200) can be restricted.

[0084] That is, when the driver's operating force is released from the pedal pad (210) while the pedal arm (220) is rotated forward, the pedal arm (220) rotates in a direction of return due to the spring force of the return spring (530), and at this time, when the rod projection (432) provided on the master cylinder rod (430) comes into contact with the convex projection (521) formed on the spring block (520), the return stroke of the pedal arm (220) can be restricted.

[0085] The brake pedal device according to the disclosed embodiment may further include: a brake light switch (610) fixedly coupled to a case (100); a stopper bracket (620) provided to be connected to the pedal part (200); and a stopper (630) fixedly provided to the stopper bracket (620), which contacts the brake light switch (610) when the driver's pedal part (200) is not operated, and separates from the brake light switch (610) when the driver's pedal part is operated.

[0086] The brake light switch (610) can be fixedly coupled to the upper surface of the first case (110), and the stopper bracket (620) can be fixedly coupled to the spring seat (510) coupled to the pedal arm (220), so that the stopper bracket (620) can be provided to be connected to the pedal part (200) through the spring seat (510).

[0087] A case (100) according to the disclosed embodiment may be composed of a first case (110) on the front side and a second case (120) on the rear side.

[0088] A case hole (140) that allows a pedal arm (230) to pass through the upper surface of the case (100) and to allow rotation of the pedal arm (230) in the forward and backward directions may be formed to extend in the forward and backward directions.

[0089] Additionally, a nipple hole (151) to which a first nipple (310) and a second nipple (320) are combined, and a port hole (160) to which a first port (330) and a second port (340) are combined may be formed on the front of the first case (100).

[0090] Additionally, the upper rear surface of the case (100) may be formed as an inclined surface (170) having a predetermined slope so that it can be used as a footrest surface on which a driver can rest their foot.

[0091] The inclined surface (170) can be formed on the second case (120), and the inclined surface (170) on one side relative to the pedal arm (220) can be used as a seat surface for the footrest.

[0092] FIGS. 9 to 12 show the state before the driver operates the pedal unit (100), and FIGS. 13 to 16 show the state after the driver operates the pedal unit (100).

[0093] When the driver operates the pedal pad (210) by stepping on it with their foot (arrow F1), the pedal arm (220) rotates forward (arrow R2) due to the rotation of the barrel cam (420) (arrow R1). When the barrel cam (420) rotates, one end of the master cylinder rod (430) moves along the guide groove (421) of the barrel cam (420), and as a result, the master cylinder rod (430) moves toward the brake master cylinder (300). (arrow M1)

[0094] When the master cylinder rod (430) moves in a straight line, the brake master cylinder (300) is compressed, and brake hydraulic pressure is generated. The generated brake hydraulic pressure is transmitted to the front wheel braking device (30) and the rear wheel braking device (40) through the first port (330) and the second port (340) to generate braking force.

[0095] The vehicle of the disclosed embodiment comprises a case (100) installed on a vehicle panel part (10), a pedal part (200) and a brake master cylinder (300) installed together on the case (100), wherein the brake master cylinder (300) is a brake pedal device installed to be arranged in a left-right direction perpendicular to the operating direction of the pedal part (200); and a braking device located on the wheel of the vehicle and generating braking force when the brake pedal device is operated.

[0096] The braking device may include a front wheel braking device (30) and a rear wheel braking device (40).

[0097] As described above, the brake pedal device according to the disclosed embodiment is configured such that a pedal part (200) operated by a driver and a brake master cylinder (300) that generates brake hydraulic pressure are provided together in a single case (100), and the external size of the brake pedal device can be configured to a compact size, and it can be effectively applied to small vehicles, thereby having the advantage of improving productivity and marketability.

[0098] In addition, the brake master cylinder (300) is configured to be installed within the case (100) in a left-right direction perpendicular to the operating direction of the pedal part (200), thereby allowing the front-to-back length (L1) of the brake pedal device to be reduced, which has the advantage of being effectively applicable to small vehicles with limited front space.

[0099] In addition, the disclosed embodiment is configured such that the pedal part (200) is an organ-type pedal, which has the advantage of being advantageous for pedal operation when applied to a small vehicle with a high seating position in the driver's seat.

[0100] Although specific embodiments of the disclosed embodiments have been illustrated and described, it will be obvious to those skilled in the art that the disclosed embodiments may be modified and changed in various ways without departing from the technical spirit of the disclosed embodiments provided by the following claims. Explanation of the symbols

[0101] 10 - Panel section 20 - Brake fluid reservoir tank 30 - Front braking system 40 - Rear braking system 100 - Case 110 - Case 1 120 - Case 2 130 - 1st pin 140 - Case Hole 150 - Nipple Hole 160 - Pothole 170 - Slope 200 - Pedal section 210 - Pedal Pad 220 - Pedal Arm 230 - 2nd pin 240 - 3rd pin 300 - Brake Master Cylinder 310 - 1st nipple 320 - 2nd nipple 330 - 1st port 340 - 2nd port 350 - 5th pin 400 - Power transmission unit 410 - Cam bracket 420 - Barrel Cam 421 - Guide Home 422 - Hinge projection 430 - Master Cylinder Rod 431 - Sphere 432 - Rod protrusion 440 - 4th pin 510 - Spring Seat 520 - Spring Block 521 - Block protrusion 530 - Return spring 540 - 6th pin 550 - 7th pin 610 - Brake light switch 620 - Stopper Bracket 630 - Stopper

Claims

Claim 1 A brake pedal device comprising: a case fixedly installed on a vehicle panel; a pedal portion rotatably installed on the case and operated by a driver; and a brake master cylinder fixedly installed within the case, which operates by transmitting operating force through the pedal portion and generates brake hydraulic pressure upon operation; wherein the brake master cylinder is installed within the case in a left-right direction perpendicular to the operating direction of the pedal portion. Claim 2 A brake pedal device according to claim 1, further comprising a power transmission unit positioned within the case and arranged in the left-right direction, connecting the pedal unit and the brake master cylinder to transmit the driver's operating force of the pedal unit to the brake master cylinder. Claim 3 A brake pedal device according to claim 1, wherein the pedal portion is an organ-type pedal that operates by rotating back and forth relative to the case around the other end located inside the case when the driver steps on one end protruding upward from the case with their foot. Claim 4 A brake pedal device according to claim 2, wherein the pedal portion comprises: a pedal pad operated by a driver; and a pedal arm installed through the upper surface of the case, one end of which is coupled to the pedal pad outside the case, and the other end of which is coupled to a power transmission portion rotatably installed within the case relative to the case. Claim 5 A brake pedal device according to claim 1, characterized in that the first nipple and the second nipple connected to the brake oil reservoir tank in the brake master cylinder are provided to penetrate the front of the case and be exposed to the outside. Claim 6 A brake pedal device according to claim 1, characterized in that the first port and the second port connected to the front wheel braking device and the rear wheel braking device in the brake master cylinder are provided to be exposed to the outside by penetrating the front of the case. Claim 7 A brake pedal device according to claim 2, wherein the power transmission unit comprises: a cam bracket fixedly installed and spaced apart in the left-right direction within a case; a barrel cam rotatably installed on the cam bracket, coupled to a pedal unit, and having a spiral guide groove formed on its outer surface extending in the longitudinal direction; and a master cylinder rod, one end of which is inserted into the guide groove and moves along the guide groove when the barrel cam rotates, is bent at a predetermined angle and extends in the longitudinal direction of the brake master cylinder, and the other end of which is connected to the brake master cylinder. Claim 8 A brake pedal device according to claim 7, characterized in that the brake master cylinder and the barrel cam are spaced apart in the front-rear direction and extended left-right while being arranged parallel to each other. Claim 9 A brake pedal device according to claim 7, characterized in that when the pedal part and the barrel cam rotate due to driver operation, one end of the master cylinder rod moves along the guide groove so that the master cylinder rod moves linearly, and when the master cylinder rod moves linearly, the brake master cylinder is compressed to generate brake hydraulic pressure. Claim 10 A brake pedal device according to claim 7, characterized in that when the pedal part rotates forward relative to the case by operation of the driver, the front surface of the pedal part contacts a case hole formed in the case, thereby restricting the operation stroke of the pedal part. Claim 11 A brake pedal device according to claim 7, further comprising: a spring seat located within the case and coupled to the pedal portion; a spring block located within the case and fixed to the case; and a return spring installed such that both ends are supported by the spring seat and the spring block, and which returns the pedal portion by spring force. Claim 12 A brake pedal device according to claim 11, wherein the master cylinder rod is provided with a rod projection protruding therefrom; the spring block is provided with a block projection protruding in a direction toward the master cylinder rod; and when the pedal part performs a return operation by the spring force of the return spring, the return stroke of the pedal part is restricted when the rod projection contacts the block projection. Claim 13 A brake pedal device according to claim 1, further comprising: a brake light switch fixedly coupled to the case; a stopper bracket provided to be connected to the pedal portion; and a stopper fixedly provided to the stopper bracket, which contacts the brake light switch when the driver does not operate the pedal portion and separates from the brake light switch when the driver operates the pedal portion. Claim 14 A brake pedal device according to claim 1, characterized in that the upper rear surface of the case is formed as an inclined surface having a predetermined slope so as to be used as a footrest surface on which a driver can rest their foot. Claim 15 A brake pedal device according to claim 7, wherein the barrel cam is formed in a cylindrical shape, and hinge projections protruding from both left and right ends are rotatably coupled to a cam bracket; and when the pedal part rotates, the barrel cam coupled to the pedal part rotates relative to a cam bracket fixed to a case. Claim 16 A brake pedal device according to claim 7, wherein the barrel cam has a spiral guide groove formed to extend in the longitudinal direction; one end of a master cylinder rod is inserted into the guide groove; and the one end of the master cylinder rod is formed as a circular sphere. Claim 17 A vehicle characterized by comprising: a case installed in a vehicle panel section, a pedal section and a brake master cylinder installed together in the case, wherein the brake master cylinder is installed so as to be positioned in a left-right direction perpendicular to the operating direction of the pedal section; and a braking device located on a wheel of the vehicle and generating braking force when the brake pedal device is operated.

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