Organ-type electronic brake pedal device

Abstract

The present invention relates to an accordion type electronic brake pedal device having a high load spring module and a hysteresis module, which is capable of adjusting different pedal forces, strokes, and hysteresis operating forces required for each vehicle type by changing components of the high load spring module or the hysteresis module. In particular, the accordion type electronic brake pedal device includes a pedal housing fixedly installed on a floor under a driver seat of a vehicle, a pedal pad rotatably coupled to the pedal housing to be operated by a driver of the vehicle, a high load spring module including first and second ends rotatably coupled to the pedal housing and the pedal pad, respectively, and a hysteresis module connecting the pedal housing and the pedal pad and generating hysteresis when the driver operates the pedal pad.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an accordion type electronic brake pedal device, and more particularly, to an accordion type electronic brake pedal device capable of adjusting pedal force, stroke, and hysteresis operation force. BACKGROUND

[0002] The statements in this section merely provide background information related to the present disclosure and do not constitute the related art.

[0003] Generally, brake pedal devices of a vehicle can be classified into a suspended brake pedal suspended on an instrument panel and an accordion type brake pedal having a pedal pad installed on a floor based on their installation structure.

[0004] In the suspended brake pedal, the center of rotation of the pedal pad is located at the upper side, and thus, a driver operates the brake pedal by pressing down the lower portion of the pedal pad or pushing the pedal pad forward using the toe of the foot. In the accordion type brake pedal, the center of rotation of the pedal pad is located at the lower side, and the driver operates the brake pedal by rotating the upper portion of the pedal pad forward.

[0005] The accordion type brake pedal device is configured such that the pedal pad on which the driver's foot is placed has a large area and the movement trajectory of the pedal pad is similar to that of the driver's foot, so that the operation feeling of the brake pedal device can be improved. Therefore, the accordion type brake pedal device has an advantage of being more comfortable to operate than the suspended brake pedal device.

[0006] However, we found that the accordion type brake pedal devices currently used cannot effectively cope with different requirements for pedal force, stroke, or hysteresis operation force for each vehicle model. Therefore, the entire brake pedal device must be newly manufactured whenever necessary, which requires excessive investment.

[0007] The contents described as related art are provided only to help the understanding of the background of the present disclosure, and should not be considered as corresponding to the related art known to those skilled in the art. SUMMARY

[0008] The present disclosure provides an accordion type electronic brake pedal device having a high load spring module and a hysteresis module, and capable of adjusting different pedal force, stroke, and hysteresis operation force required for each vehicle model by changing components of the high load spring module or the hysteresis module, thereby reducing costs.

[0009] According to one form of the present application, an accordion electronic brake pedal apparatus includes a pedal housing fixedly mounted on a floor of a vehicle, a pedal pad rotatably coupled to the pedal housing along a front-rear direction by a hinge pin and operated by a driver, a high load spring module having first and second ends rotatably coupled to the pedal housing and the pedal pad, respectively, and a hysteresis module connecting the pedal housing and the pedal pad to each other and generating hysteresis when the pedal pad is operated by the driver.

[0010] The accordion electronic brake pedal apparatus can further include a plurality of pedal sensors fixedly mounted in the pedal housing, connected to the pedal pad, and each generating a signal related to braking of the vehicle as the pedal pad rotates.

[0011] The pedal pad can include a box-shaped pad portion having a pad surface operated by a foot of the driver and rotatably coupled to the first end of the high load spring module, and a pedal arm portion having an upper end connected to the pad portion and a lower end coupled to the hinge pin and connected to the pedal sensors. In one form, the box-shaped pad portion includes an opening open toward the front, and the first end of the high load spring module is inserted into the opening of the box-shaped pad portion.

[0012] A sensor pin can be coupled to the pedal arm portion above the hinge pin and to a sensor rod of the pedal sensors.

[0013] The pad portion can pass through a housing hole formed in the pedal housing to be inserted into or protrude from the pedal housing according to rotation of the pedal pad, and the pedal arm portion can always be located in the pedal housing regardless of rotation of the pedal pad.

[0014] The accordion electronic brake pedal apparatus can further include a stroke damper located on the high load spring module and limiting a stroke of the pedal pad when the pedal pad is rotated forward while the high load spring module is compressed.

[0015] The high load spring module can include a housing connection portion rotatably coupled to the pedal housing, a pad connection portion rotatably coupled to the pedal pad and moving together with the pedal pad, and a plurality of high load springs connecting the housing connection portion and the pad connection portion to each other and generating a pedal force while being compressed as the pad connection portion moves toward the housing connection portion.

[0016] The accordion electronic brake pedal apparatus can further include a stroke damper coupled to and surrounding the housing connection portion and regulating a stroke of the pedal pad by contacting the pad connection portion when the pad connection portion moves toward the housing connection portion while the pedal pad is rotated forward and the high load springs are compressed.

[0017] The hysteresis module can include a friction member fixed in the pedal housing and having a friction surface at an upper end thereof, a friction rod having a lower end in contact with the friction surface of the friction member and moving along the friction surface in a state of contact with the friction surface as the pedal pad rotates, a hysteresis damper fixed to the pedal pad, and a hysteresis spring installed so that both opposite ends thereof are supported by the friction rod and the hysteresis damper, respectively.

[0018] The friction surface can be formed as a curved surface having an arcuate trajectory in the forward and rearward directions, a rear end of the friction surface having the same trajectory as a radius of rotation centered on the hinge pin, and the arcuate trajectory of the friction surface gradually being greater than the radius of rotation from the rear end of the friction surface toward the front end of the friction surface.

[0019] The friction rod can be injection molded of plastic and can be in frictional contact with the friction surface.

[0020] The friction rod, the hysteresis damper, and the hysteresis spring can be connected in series with each other.

[0021] The friction member can have a connection protrusion protruding upward from the front end of the friction surface, and the connection protrusion can have a stroke protrusion that limits a stroke of the pedal pad by contact with the pedal pad rotating forward.

[0022] Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to make the present disclosure easily understood, various forms thereof will now be described by way of example with reference to the accompanying drawings, in which:

[0024] Figure 1 is a view of an accordion-type electronic brake pedal apparatus according to one form of the present disclosure;

[0025] Figure 2 is Figure 1 a side view of the pedal pad with the pad portion protruding rearward as the pedal pad rotates rearward;

[0026] Figure 3 is a view of Figure 2 with the pedal sensor removed therefrom;

[0027] Figure 4 is a view of one form of the present invention with the pad portion of the pedal pad inserted into the pedal housing as the pedal pad rotates forward;

[0028] Figure 5 is a view of Figure 4 with the pedal sensor removed therefrom;

[0029] Figure 6 is an exploded perspective view of a pedal pad, a high load spring module, and a hysteresis module according to one form of the present disclosure;

[0030] Figure 7 is a view of a high load spring module according to another form of the present disclosure;

[0031] Figure 8A shows a state in which a pedal arm portion and a stroke protrusion portion are separated from each other when a pedal pad is rotated rearward according to one form of the present disclosure; and

[0032] Figure 8B shows a state in which a pedal arm portion and a stroke protrusion portion are in contact when a pedal pad is rotated forward according to another form of the present disclosure.

[0033] The accompanying drawings described herein are for purposes of illustration only and are not intended to limit the scope of the present disclosure in any way. DETAILED DESCRIPTION

[0034] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

[0035] The specific descriptions of the structure and function of the forms of the present disclosure described herein are merely illustrative. These forms can be implemented in various forms, and the above description is not to be interpreted as limiting the present disclosure to this.

[0036] The present disclosure can be variously modified and has several exemplary forms, and thus a specific exemplary form will be shown in the accompanying drawings and described in detail. However, it should be understood that the present disclosure is not limited to the specific exemplary form and includes all modifications, equivalents, and alternatives included in the spirit and scope of the present disclosure.

[0037] Terms such as "first", "second", etc. can be used to describe various components, and these components should not be interpreted as being limited to these terms. These terms are used only to distinguish one component from another component. For example, a "first" component can be named as a "second" component without departing from the scope of the present disclosure, and a "second" component can also be similarly named as a "first" component.

[0038] It will be understood that when an element is referred to as being "connected to" or "coupled to" another element, it can be directly connected or coupled to the other element or intervening elements can be present. In contrast, it will be understood that when an element is referred to as being "directly connected to" or "directly coupled to" another element, there are no intervening elements present. Other expressions that describe the relationship between elements should be interpreted in a like fashion, i.e., "between," "directly between," "adjacent to," "directly adjacent to," etc.

[0039] The terminology used in the present specification is for the purpose of describing particular example forms only and is not intended to limit the present disclosure. Unless clearly indicated otherwise, singular forms used herein are intended to include the plural forms as well. It will be further understood that the terms "includes" and / or "has," when used in this specification, specify the presence of stated features, numbers, steps, operations, components, parts, or combinations thereof, and do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0040] Unless otherwise defined, it will be understood that all terms used herein, including technical and scientific terms, have the same meaning as those understood by a person of ordinary skill in the art. It must be understood that terms defined in a dictionary have the same meaning as those in the context of the relevant technology, and unless explicitly defined in the context, they should not be ideally or overly formally limited.

[0041] The control unit (controller) according to an example form of the present disclosure can be implemented by an algorithm configured to control the operations of various components of the vehicle, a non-volatile memory (not shown) configured to store data related to software instructions for reproducing the algorithm, and a processor (not shown) configured to perform the operations described below using the data stored in the memory. Here, the memory and the processor can be implemented as separate chips. Alternatively, the memory and the processor can be implemented as a single chip integrated with each other. The processor can be implemented as one or more processor chips.

[0042] Hereinafter, an accordion-type electronic brake pedal apparatus according to a form of the present disclosure is described with reference to the accompanying drawings.

[0043] As Figures 1 to 7As illustrated, an electronic brake pedal apparatus according to one form of the present disclosure includes a pedal housing 100 fixedly installed in a space below a driver seat of a vehicle, a pedal pad 300 rotatably coupled to the pedal housing 100 in a forward and backward direction by a hinge pin 200 and operated by a driver of the vehicle, a high load spring module 400 rotatably coupled to the pedal housing 100 and the pedal pad 300 at opposite ends, respectively, and a hysteresis module 500 connecting the pedal housing 100 and the pedal pad 300 to each other and generating hysteresis when the pedal pad 300 is operated by the driver.

[0044] The pedal housing 100 can be formed in the shape of a box having an empty internal space in which the high load spring module 400, the hysteresis module 500, and a pedal sensor, etc. to be described below can be installed, and a cover 110 can be detachably coupled to opposite sides of the pedal housing 100, respectively.

[0045] The pedal pad 300 can include a pad surface 311 operated by a driver's foot, and the pad surface 311 is a structure spaced apart upward from the hinge pin 200. When the pedal pad 300 is rotated backward around the hinge pin 200 and protrudes from the pedal housing 100, the pedal pad 300 has a pull-out structure in which only a portion of the pad surface 311 of the pedal pad 300 protrudes from the pedal housing 100 (see Figure 2 ). Accordingly, it is impossible for the driver to step on a portion other than the pad surface 311 of the pedal pad 300 with the foot.

[0046] The present disclosure can further include a plurality of pedal sensors 600 fixedly installed in the pedal housing 100, connected to the pedal pad 300, and each generating a signal related to vehicle braking when the pedal pad 300 is rotated.

[0047] Each pedal sensor 600 can include a sensor rod 610 rotatably coupled. The sensor rod 610 can be connected with a sensor pin 620 coupled to the pedal pad 300, and the sensor rod 610 is rotated by the sensor pin 620 when the pedal pad 300 is rotated with respect to the pedal housing 100.

[0048] In addition, a permanent magnet can be coupled to the sensor rod 610, a printed circuit board (PCB) is provided in the pedal sensor 600, the PCB is disposed to face the permanent magnet, and the PCB can be electrically connected with a power supply device such as a battery through a wire.

[0049] Accordingly, when the driver operates the pedal pad 300 with his foot to rotate the pedal pad 300 with respect to the pedal housing 100, the sensor rod 610 connected to the pedal pad 300 through the sensor pin 620 rotates. When the sensor rod 610 rotates, the position of the permanent magnet coupled to the sensor rod 610 can change, and thus the pedal sensor 600 can detect the operation (rotation) of the pedal pad 300 through the change in the magnetic field intensity caused by the change in the rotational position of the permanent magnet, thereby generating a signal related to the vehicle braking.

[0050] The pedal sensor 600 according to the present disclosure can be a contact type pedal sensor connected to the pedal pad 300 through a mechanical structure, i.e., the sensor rod 610, and as needed, can be a non-contact type pedal sensor including only a permanent magnet and a PCB.

[0051] In one form, the pedal pad 300 can include a box-shaped pad portion 310 having a pad surface 311, and one end of the high-load spring module 400 is inserted into the box-shaped pad portion 310 and rotatably coupled to the box-shaped pad portion 310, and a pedal arm portion 320 having an upper end connected to the pad portion 310 and a lower end connected to the hinge pin 200 and connected to the pedal sensor 600.

[0052] When viewed from the side, the pad portion 310 and the pedal arm portion 320 can be formed in an L shape.

[0053] According to one form of the present disclosure, the sensor pin 620 can be coupled to the pedal arm portion 320 located between the pad portion 310 and the hinge pin 200, and the sensor pin 620 can be coupled to the sensor rod 610 of the pedal sensor 600.

[0054] Since the sensor pin 620 is coupled to the pedal arm portion 320, the pedal sensor 600 can be brought close to the pedal arm portion 320, thereby reducing the overall size of the device.

[0055] The pad portion 310 can be configured such that the front portion of the high-load spring module 400 into which the pad portion 310 is inserted is open, and all other portions are sealed to prevent foreign matter from flowing in.

[0056] In the pedal pad 300, the lower end of the pedal arm portion 320 is coupled to the pedal housing 100 so as to be rotatable forward and backward with respect to the pedal housing with the hinge pin 200 as the center. When the pedal arm portion 320 is rotated forward, the pad portion 310 spaced apart upward from the hinge pin 200 can be inserted into the pedal housing 100 through the housing hole 120 formed in the pedal housing 100, and when the pedal arm portion 320 is rotated backward, the pad portion 310 can be exposed by protruding backward from the pedal housing 100, i.e., toward the driver.

[0057] The upper surface and the lower surface of the pad portion 310 can each be formed in an arc shape having the same track as a radius of rotation of the pedal pad 300 centered on the hinge pin 200. Accordingly, the pad portion 310 can maintain a constant gap with the housing hole 120 formed in the pedal housing 100, thereby preventing inflow of foreign matter as much as possible.

[0058] The pad portion 310 can be installed to pass through the housing hole 120 formed in the pedal housing 100 to be inserted into or protrude from the pedal housing 100 as the pedal pad 300 rotates, and the pedal arm portion 320 can always be located in the pedal housing 100 regardless of the rotation of the pedal pad 300, thereby preventing contact with the driver.

[0059] Accordingly, when the driver operates the pedal pad 300 by stepping on the pedal pad 300 with the foot, only the pad surface 311 of the pad portion 310 exposed from the pedal housing 100 can be operated. The pedal arm portion 320 located in the pedal housing 100 is prevented from contacting the driver's foot, thereby being unable to be operated by the driver, thereby preventing the driver from misoperation.

[0060] One end of the high-load spring module 400 can be rotatably coupled to the front of the pedal housing 100 through the first protrusion 411, and the other end is inserted into the pad portion 310 and rotatably coupled to the pad portion 310 through the second protrusion 421.

[0061] The high-load spring module 400 can be installed to be inclinedly disposed in a direction in which the pad portion 310 moves.

[0062] That is, the high-load spring module 400 can include a housing connection portion 410 rotatably coupled to the pedal housing 100, a pad connection portion 420 rotatably coupled to the pedal pad 300 and moving together with the pedal pad 300, and a plurality of high-load springs 430 connecting the housing connection portion 410 and the pad connection portion 420 to each other and generating a pedal force while being compressed when the pad connection portion 420 moves toward the housing connection portion 410.

[0063] The first protrusion 411 can be disposed to protrude outward from a lower end of the housing connection portion 410 and be rotatably coupled to the pedal housing 100.

[0064] The second protrusion 421 can be disposed to protrude outward from an upper end of the pad connection portion 420 and be inserted into the pad portion 310 and rotatably coupled to the pad portion 310.

[0065] The housing connection portion 410 can have a guide hole 412 extending in a length direction, and the pad connection portion 420 can have a guide rod 422 inserted into and moving along the guide hole 412.

[0066] The high-load spring 430 can include three springs having different spring forces so that other undamaged springs can perform their functions when one spring is damaged.

[0067] Due to the difference and safety in the operation process of the brake pedal and the accelerator pedal of a vehicle, the brake pedal of the vehicle can require a high load, and for this, a high-load spring module 400 according to one form of the present disclosure can be used. One form can use the high-load spring module 400 to achieve the required pedal force, and thus a small capacity motor used in a general foldable accelerator pedal device can be used, thereby reducing costs.

[0068] The pedal force can be adjusted by using the high-load spring 430 having different spring forces based on the vehicle model.

[0069] The present disclosure can further include a stroke damper 700 located on the high-load spring module 400 and adjusting the stroke of the pedal pad 300 when the high-load spring module 400 is compressed as the pedal pad 300 rotates forward.

[0070] That is, the stroke damper 700 can be coupled to and surround the housing connection portion 410 on the high-load spring module 400.

[0071] When the pedal pad 300 rotates forward around the hinge pin 200 by the operation of the driver and the pad connection portion 420 moves toward the housing connection portion 410 while compressing the high-load spring 430, the stroke damper 700 comes into contact with the pad connection portion 420 to limit the stroke of the pedal pad 300.

[0072] The stroke of the pedal can be adjusted by using the stroke damper 700 having different lengths based on the vehicle model.

[0073] The hysteresis module 500 according to one form of the present disclosure can include a friction member 510 fixed in the pedal housing 100 and having a friction surface 511 at an upper end thereof, a friction rod 520 having a lower end in contact with the friction surface 511 of the friction member 510 and moving along the friction surface 511 in a state of contact with the friction surface 511 when the pedal pad 300 rotates, a hysteresis damper 530 fixed to the pedal pad 300, and a hysteresis spring 540 installed so that both opposite ends thereof are supported by the friction rod 520 and the hysteresis damper 530, respectively.

[0074] The friction rod 520, the hysteresis damper 530, and the hysteresis spring 540 can be provided in the pedal arm portion 320 of the pedal pad 300.

[0075] According to another form of the friction member 510 of this disclosure, the friction surface 511 can be formed as a curved surface with an arcuate trajectory in the forward and backward directions. In this case, the rear end of the friction surface 511 has the same trajectory as the radius of rotation R1 centered on the hinge pin 200, and the arcuate trajectory R2 of the friction surface 511 gradually increases in size from the rear end of the friction surface to the front end of the friction surface, thus increasing the radius of rotation R1. Therefore, the pedal force when the driver depresses and operates the pedal pad 300 can be distinguished from the pedal force when the pedal pad 300 returns to its original position, thereby achieving pedal hysteresis.

[0076] According to another form of this disclosure, the friction rod 520 of the hysteresis module 500 can be injection molded from plastic and can be in frictional contact with the friction surface 511, thereby achieving smooth hysteresis due to friction.

[0077] In some forms of this disclosure, the hysteresis pedal force can be achieved through the friction of the friction surface 511, the friction rod 520 of the injection-molded material, and the hysteresis damper 530.

[0078] The friction surface 511 of the friction member 510 and the injection-molded friction rod 520 can contact each other to achieve frictional force, and the hysteresis damper 530 made of rubber material can greatly generate the elastic force of the hysteresis spring 540, thereby increasing the hysteresis pedal force.

[0079] The hysteresis damper 530 can have a larger elastic modulus than a conventional spring, thereby increasing friction by increasing its normal force. However, the hysteresis damper 530 has a longer recovery time than a conventional spring.

[0080] Some forms of this disclosure can provide a reliable return structure by connecting the friction rod 520, the hysteresis damper 530 and the hysteresis spring 540 in series to increase the hysteresis power and by significantly shortening the recovery time of the hysteresis damper 530 by utilizing the elastic force of the hysteresis spring 540.

[0081] The pedal force or hysteresis operating force can be adjusted by changing the shape of the friction surface 511 of the friction component 510, the hardness of the hysteresis damper 530, and the spring force of the hysteresis spring 540 according to the vehicle model.

[0082] like Figure 8A and Figure 8B As shown, in some forms of this disclosure, the friction member 510 may have a connecting protrusion 512 that protrudes forward and upward from the front end of the friction surface 511, and the connecting protrusion 512 may have a travel protrusion 513.

[0083] When the pedal pad 300 is rotated forward by the operation of the driver with the hinge pin 200 as the center and the pedal arm portion 320 rotated forward comes into contact with the stroke protrusion 513, the stroke protrusion 513 can limit the stroke of the pedal pad 300.

[0084] When the stroke of the pedal pad 300 is limited using the stroke protrusion 513, the stroke damper 700 coupled to the high load spring module 400 can not be used as needed, thereby reducing the cost.

[0085] The concertina brake pedal apparatus according to one form of the present disclosure can include a high load spring module 400 and a hysteresis module 500, and can appropriately adjust different pedal forces required for each vehicle type as needed by changing the shape of the high load spring 430, the friction surface 511 of the friction member 510, or the hardness of the hysteresis damper 530, or the hysteresis spring 540.

[0086] In another form, the concertina brake pedal apparatus can appropriately adjust different pedal hysteresis operating forces required for each vehicle type by changing the shape of the friction surface 511 of the friction member 510, or the hardness of the hysteresis damper 530, or the hysteresis spring 540.

[0087] In other forms, the concertina brake pedal apparatus can change the stroke damper 700 as needed to appropriately adjust different pedal strokes required for each vehicle type.

[0088] The concertina electronic brake pedal apparatus according to one form of the present disclosure can include a high load spring module and a hysteresis module, and can appropriately adjust different pedal forces required for each vehicle type as needed by changing the high load spring, or the shape of the friction surface of the friction member, or the hardness of the hysteresis damper, or the hysteresis spring.

[0089] In addition, the concertina electronic brake pedal apparatus can appropriately adjust different pedal hysteresis operating forces required for each vehicle type by changing the shape of the friction surface of the friction member, or the hardness of the hysteresis damper, or the hysteresis spring.

[0090] In one form, the concertina electronic brake pedal apparatus can appropriately adjust different pedal strokes required for each vehicle type as needed by changing the stroke damper.

[0091] While the present disclosure has been shown and described with respect to exemplary forms, it will be apparent that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.

Claims

1. An accordion electronic brake pedal apparatus comprising: a pedal housing fixedly mounted on a floor of a vehicle; a pedal pad rotatably coupled to the pedal housing by a hinge pin in a fore and aft direction and operated by a driver of the vehicle, wherein the pedal pad comprises: a box-shaped pad portion having a pad surface operated by the driver and rotatably coupled to a first end of a high load spring module; and a pedal arm portion having an upper end connected to the pad portion and a lower end coupled to the hinge pin; wherein the high load spring module further comprises a second end rotatably coupled to the pedal housing; and a hysteresis module connecting the pedal housing and the pedal pad and generating hysteresis when the pedal pad is operated by the driver, and wherein the hysteresis module comprises a friction bar and a hysteresis spring disposed within the pedal arm portion.

2. The concertina electronic brake pedal apparatus of claim 1, further comprising: a plurality of pedal sensors fixedly mounted in the pedal housing, connected to the pedal pad, and each generating a signal related to vehicle braking as the pedal pad rotates.

3. The accordion electronic brake pedal apparatus of claim 1, further comprising a pedal sensor connected to the pedal arm portion.

4. The accordion electronic brake pedal apparatus of claim 3, wherein: the box-shaped pad portion comprises an open forward-facing opening and the first end of the high load spring module is inserted into the opening of the box-shaped pad portion.

5. The accordion electronic brake pedal apparatus of claim 3, wherein: a sensor pin is coupled to the pedal arm portion above the hinge pin and to a sensor bar of the pedal sensor.

6. The accordion electronic brake pedal apparatus of claim 3, wherein: the pad portion is configured to pass through a housing hole formed in the pedal housing to be inserted into or protrude from the pedal housing as the pedal pad rotates; and the pedal arm portion is always located in the pedal housing regardless of rotation of the pedal pad.

7. An accordion electronic brake pedal apparatus comprising: a pedal housing fixedly mounted on a floor of a vehicle; a pedal pad rotatably coupled to the pedal housing by a hinge pin in a fore and aft direction and operated by a driver of the vehicle; a high load spring module comprising first and second ends rotatably coupled to the pedal housing and the pedal pad, respectively; a hysteresis module connecting the pedal housing and the pedal pad and generating hysteresis when the pedal pad is operated by the driver; and a travel damper located on the high load spring module and limiting travel of the pedal pad when the pedal pad is rotated forward and the high load spring module is compressed, wherein the high load spring module comprises: a housing connection portion rotatably coupled to the pedal housing; and a pad connection portion rotatably coupled to the pedal pad and moving with the pedal pad. ​ wherein the travel damper is coupled to the housing connection portion and surrounds the housing connection portion, and adjusts a travel of the pedal pad by contacting the pad connection portion when the pad connection portion moves toward the housing connection portion while the pad connection portion compresses the plurality of high load springs in the high load spring module as the pedal pad rotates forward. 8.The concertina electric brake pedal apparatus of claim 7, wherein, the plurality of high load springs connect the housing connection portion and the pad connection portion to each other, and generate a pedal force while the high load springs are compressed as the pad connection portion moves toward the housing connection portion. 9.A concertina electric brake pedal apparatus comprising: a pedal housing fixedly installed on a floor of a vehicle; a pedal pad rotatably coupled to the pedal housing in a front and rear direction by a hinge pin, and operated by a driver of the vehicle; a high load spring module including first and second ends rotatably coupled to the pedal housing and the pedal pad, respectively; and a hysteresis module connecting the pedal housing and the pedal pad, and generating a hysteresis as the pedal pad is operated by the driver, wherein the high load spring module includes: a housing connection portion rotatably coupled to the pedal housing; a pad connection portion rotatably coupled to the pedal pad and moving with the pedal pad; and a plurality of high load springs connecting the housing connection portion and the pad connection portion to each other, and generating a pedal force while the high load springs are compressed as the pad connection portion moves toward the housing connection portion, wherein the concertina electric brake pedal apparatus further includes a travel damper coupled to the housing connection portion and surrounding the housing connection portion, and adjusting a travel of the pedal pad by contacting the pad connection portion when the pad connection portion moves toward the housing connection portion while the pad connection portion compresses the plurality of high load springs as the pedal pad rotates forward. 10.A concertina electric brake pedal apparatus comprising: a pedal housing fixedly installed on a floor of a vehicle; a pedal pad rotatably coupled to the pedal housing in a front and rear direction by a hinge pin, and operated by a driver of the vehicle; a high load spring module including first and second ends rotatably coupled to the pedal housing and the pedal pad, respectively; and a hysteresis module connecting the pedal housing and the pedal pad, and generating a hysteresis as the pedal pad is operated by the driver wherein the hysteresis module includes: a friction member fixed in the pedal housing, and having a friction surface on an upper end thereof; a friction rod having a lower end in contact with the friction surface of the friction member, and moving along the friction surface in a state of contact with the friction surface as the pedal pad rotates; a hysteresis damper fixed on the pedal pad; and hysteresis springs installed to have both opposite ends supported by the friction rod and the hysteresis damper, respectively. 11.The concertina electric brake pedal apparatus of claim 10, wherein, The friction surface is formed as a curved surface having an arcuate trajectory in the forward and rearward directions, a rear end of the friction surface has the same trajectory as a radius of rotation centered on the hinge pin, and the arcuate trajectory of the friction surface gradually becomes larger than the radius of rotation from the rear end of the friction surface toward the front end of the friction surface.

12. The concertina electronic brake pedal apparatus according to claim 10, wherein The friction rod is injection molded from plastic and is in frictional contact with the friction surface.

13. The concertina electronic brake pedal apparatus according to claim 10, wherein The friction rod, the hysteresis damper, and the hysteresis spring are connected in series with each other.

14. The concertina electronic brake pedal apparatus according to claim 10, wherein The friction member has a connection protrusion protruding upward from the front end of the friction surface; and The connection protrusion has a stroke protrusion that limits the stroke of the pedal pad by contacting the pedal pad when rotated forward.

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