Electronic pedal structure for brake-by-wire

Abstract

The utility model discloses an electronic pedal structure for brake-by-wire, which comprises a pedal support and a pedal arm rotationally connected to the pedal support through a pedal shaft, and further comprises a pedal simulator arranged below the pedal arm, the pedal simulator is provided with a central axis, and the pedal simulator can stretch out and draw back in the extending direction of the central axis. The two ends of the pedal simulator in the telescopic direction are flexibly connected with the pedal arm and the pedal support respectively, the pedal support is provided with a mounting face, the included angle between the mounting face and the central axis ranges from 80 degrees to 100 degrees, and projections of the pedal shaft and the pedal simulator on the plane where the mounting face is located are staggered. The height of the pedal support in the electronic pedal structure is small, so that the structural size of the pedal support is small; in addition, the electronic pedal structure and an original hydraulic brake pedal can be installed on an automobile in a replaceable mode, and therefore the transition requirement of the hydraulic pedal and the electronic pedal is met in stages.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking equipment technology, specifically to an electronic pedal structure for brake-by-wire. Background Technology

[0002] The electronic pedal recognizes the driver's intention through pedal movement. The pedal sensor processes the pedal signal and sends it to the domain controller or vehicle processor. The vehicle then brakes the braking unit based on the signal to meet the driver's deceleration expectations.

[0003] Electronic pedals achieve complete decoupling from the mechanical braking unit, theoretically allowing for a smaller structure and more installation options. However, current vehicle pedal installation locations often need to consider compatibility with the mounting holes of traditional mechanical EHB boosters. Furthermore, to accommodate modern drivers' habits, a pedal simulator is required to simulate the brake feel of a hydraulic braking system.

[0004] However, in the existing technology, after designing an electronic pedal with a pedal simulator in the existing traditional pedal installation position, the electronic pedal has a large structural size, and the design and layout of the electronic pedal is relatively difficult. The original position of the hydraulic brake pedal on the car cannot be used to install the electronic pedal. That is, the electronic pedal and the original hydraulic brake pedal cannot be replaced by each other. It is necessary to modify the front cover for adaptation, resulting in high cost. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an electronic pedal structure that is small in size and can be replaced by the existing hydraulic brake pedal.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An electronic pedal structure for brake-by-wire includes a pedal bracket and a pedal arm rotatably connected to the pedal bracket via a pedal shaft. It also includes a pedal simulator disposed below the pedal arm. The pedal simulator has a central axis and is telescopically extendable along the extension direction of the central axis. Both ends of the pedal simulator in the telescopic direction are flexibly connected to the pedal arm and the pedal bracket, respectively. The pedal bracket has a mounting surface with an angle of 80° to 100° between the mounting surface and the central axis. The projections of the pedal shaft and the pedal simulator onto the plane of the mounting surface are offset from each other.

[0008] In some embodiments, the angle between the mounting surface and the central axis is 90°.

[0009] In some embodiments, the pedal bracket is provided with mounting holes corresponding to the mounting position of the EHB brake pedal on the automobile, the mounting holes are provided in four, the centers of the four mounting holes are sequentially connected to form a quadrilateral structure, and the mounting position of the pedal simulator on the pedal bracket is located in the middle of the quadrilateral structure.

[0010] In some embodiments, the part of the pedal arm mounting the pedal simulator is provided with protrusions protruding to the left and right and to the outside of the pedal arm, the protrusions extend from the upper end surface to the lower end surface of the pedal arm, the protrusions are located on the inside of the quadrilateral structure, and the projections of the protrusions on the plane of the mounting surface are staggered with the positions of the mounting holes.

[0011] In some embodiments, the pedal simulator comprises an upper shell, a lower shell, and an elastic assembly provided between the upper shell and the lower shell, the upper shell is slidably arranged on the lower shell along the extension direction of the central axis, the sliding of the upper shell relative to the lower shell along the extension direction of the central axis causes the pedal simulator to stretch and retract, the end of the upper shell away from the lower shell is connected to the pedal arm in a universal manner, and the end of the lower shell away from the upper shell is connected to the pedal bracket in a universal manner.

[0012] In some embodiments, the end of the upper shell away from the lower shell is provided with a first ball head on one of the pedal arm and the other, and the other is provided with a first ball socket matched with the first ball head, the first ball head is arranged in the first ball socket in a universal manner, and the ball centers of the first ball head and the first ball socket are located on the central axis.

[0013] In some embodiments, the end of the lower shell away from the upper shell is provided with a second ball head on one of the pedal bracket and the other, and the other is provided with a second ball socket matched with the second ball head, the second ball head is arranged in the second ball socket in a universal manner, and the ball centers of the second ball head and the second ball socket are located on the central axis.

[0014] In some embodiments, the pedal simulator further comprises a piston and a hysteresis assembly provided between the upper shell and the lower shell, the elastic assembly comprises a first elastic component abutting between the piston and the upper shell, and a second elastic component abutting between the piston and the lower shell, one of the first elastic component and the second elastic component has a smaller elastic force when compressed than the initial force of the other; the hysteresis assembly comprises a wedge-shaped friction block, the friction block forms a slope from the inside and abuts on the piston, and abuts on the inner wall of the upper shell or / and the lower shell from the outside.

[0015] In some embodiments, the pedal arm is connected with the pedal shaft in an interference fit, an anti-rotation structure is arranged between the pedal arm and the pedal shaft, and the pedal shaft is rotatably connected to the pedal support.

[0016] In some embodiments, the electronic pedal structure further comprises a sensor assembly for detecting the rotation angle of the pedal arm, the sensor assembly comprising a sensing rotor fixedly arranged at an end of the pedal shaft and an angle sensor fixedly arranged on the pedal support, the position of the angle sensor corresponding to the position of the sensing rotor, and the sensing rotor and the angle sensor being in sensing cooperation.

[0017] The sensor assembly is arranged at any one of the left and right ends of the pedal shaft, or the sensor assembly is arranged at both ends of the pedal shaft.

[0018] Thanks to the above technical scheme, the electronic pedal structure for brake-by-wire of the present application has the following advantages compared with the prior art: in the electronic pedal structure for brake-by-wire of the present application, the included angle between the central axis of the pedal simulator and the mounting surface of the pedal support is set to 80-100°, so that the projection of the pedal simulator and the pedal shaft on the plane where the mounting surface is located is staggered with each other, thereby reducing the height of the pedal support and reducing the structure size of the pedal support; moreover, such arrangement enables the electronic pedal structure to be installed on the automobile in a replacement manner with the original hydraulic brake pedal, thereby solving the transitional demand of hydraulic and electronic pedals. BRIEF DESCRIPTION OF DRAWINGS

[0019] FIG. 1 is a perspective view of the electronic pedal structure for brake-by-wire of the present application; Figure 1 FIG. 2 is an exploded view of the electronic pedal structure for brake-by-wire of the present application;

[0020] FIG. 3 is a projection view of the electronic pedal structure for brake-by-wire of the present application; Figure 2 FIG. 4 is a sectional view of the electronic pedal structure for brake-by-wire of the present application along line A-A;

[0021] FIG. 5 is an enlarged view of part A of the electronic pedal structure for brake-by-wire of the present application. Figure 3

[0022] FIG. 6 is an enlarged view of part B of the electronic pedal structure for brake-by-wire of the present application. Figure 4 FIG. 7 is an enlarged view of part C of the electronic pedal structure for brake-by-wire of the present application. Figure 3 FIG. 8 is an enlarged view of part D of the electronic pedal structure for brake-by-wire of the present application.

[0023] Figure 5 FIG. 9 is an enlarged view of part E of the electronic pedal structure for brake-by-wire of the present application. Figure 4

[0024] ​​​Wherein: 1, pedal support; 11, mounting surface; 12, mounting hole; 13, seat body; 131, second ball socket; 2, pedal arm; 21, convex part; 22, first ball head; 3, pedal shaft; 31, anti-twist rib; 4, pedal simulator; 41, central axis; 42, upper shell; 421, first ball socket; 43, lower shell; 431, second ball head; 44, piston; 45, first elastic component; 46, second elastic component; 47, friction block; 51, induction rotor; 52, angle sensor. DETAILED DESCRIPTION

[0025] In order to make the above objectives, characteristics and advantages of the present application more apparent, understandable and easier to be understood, the present application will be described in detail below with the accompanying drawings and specific embodiments. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0028] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0031] As shown in Figures 1-4 The electronic pedal structure for brake-by-wire of the present application comprises a pedal bracket 1, a pedal arm 2, a pedal shaft 3 and a pedal simulator 4.

[0032] The pedal arm 2 is rotatably connected to the pedal bracket 1 through the pedal shaft 3. In this embodiment, the pedal shaft 3 is fixedly arranged at one end of the pedal arm 2, and the pedal shaft 3 is rotatably connected to the pedal bracket 1. Specifically, the pedal arm 2 is provided with a first shaft hole, which is sleeved on the pedal shaft 3 and connected to the pedal shaft 3 through interference fit, so that the pedal arm 2 and the pedal shaft 3 are fixedly connected together. The pedal bracket 1 is provided with a second shaft hole, which is sleeved on the pedal shaft 3 and connected to the pedal shaft 3 through clearance fit, so that the pedal shaft 3 can rotate relative to the pedal bracket 1.

[0033] A rotation prevention structure is arranged between the pedal arm 2 and the pedal shaft 3, so that the pedal shaft 3 and the pedal arm 2 can synchronously rotate relative to the pedal bracket 1, and relative movement between the pedal arm 2 and the pedal shaft 3 after assembly is prevented. In this embodiment, as shown in Figure 2 The rotation prevention structure is a torsion prevention rib 31 arranged on the outer circumferential surface of the pedal shaft 3 and extending in the axial direction thereof. A plurality of torsion prevention ribs 31 are arranged at intervals in the circumferential direction of the pedal shaft 3.

[0034] The pedal simulator 4 is arranged below the pedal arm 2 and between the pedal arm 2 and the pedal bracket 1. The pedal simulator 4 has a central axis 41, and when the pedal arm 2 rotates, the pedal simulator 4 can stretch and contract along the extension direction of the central axis 41, thereby providing appropriate pedal feeling while outputting the driver's braking intention.

[0035] The pedal bracket 1 has a mounting surface 11, which refers to a plane where the pedal bracket 1 contacts the automobile parts when the electronic pedal structure is mounted on the automobile. The angle a between the mounting surface 11 and the central axis 41 is 80-100°, preferably 90°. The projections of the pedal shaft 3 and the pedal simulator 4 on the plane where the mounting surface 11 is located are staggered, as shown in Figure 4

[0036] The mounting mode of the pedal simulator 4 is arranged in this way, so that the height of the pedal bracket 1 is reduced, and thus the structural size of the pedal bracket 1 is reduced.

[0037] In addition, the mounting position of the electronic pedal structure on the automobile is consistent with the mounting position of the original hydraulic brake pedal on the automobile, i.e. the electronic pedal structure of the present application can be installed on the automobile in place of the original hydraulic brake pedal.

[0038] Specifically, as shown in Figure 3 The pedal bracket 1 is provided with mounting holes 12 for mounting the electronic pedal structure on the automobile. The mounting holes 12 are arranged in a quadrilateral structure, and the positions of the mounting holes 12 correspond to the mounting position of the EHB brake pedal on the automobile, i.e. the size of the quadrilateral structure is generally 60x80 or 72x72. The mounting position of the pedal simulator 4 on the pedal bracket 1 is located in the middle of the quadrilateral structure, so as to be staggered with the positions of the mounting holes 12. In this way, the pedal simulator 4 does not affect the mounting of the pedal bracket 1 on the automobile.

[0039] In addition, as shown in Figure 3 The part of the pedal arm 2 where the pedal simulator 4 is mounted is provided with protrusions 21, which protrude to the left and right and to the outside of the pedal arm 2. The protrusions 21 extend from the upper end surface to the lower end surface of the pedal arm 2, and the protrusions 21 on the left and right sides can be the same or different. The thickness of the part of the pedal arm 2 where the pedal simulator 4 is mounted is increased by the protrusions 21, so as to improve the structural strength of the pedal arm 2. The protrusions 21 are located on the inner side of the quadrilateral structure, and the projections of the protrusions 21 on the plane where the mounting surface 11 is located are also staggered with the positions of the mounting holes 12. In this way, the protrusions 21 on the pedal arm 2 do not block the mounting holes 12, so as to affect the mounting of the pedal bracket 1 on the automobile.

[0040] ​The two ends of the telescopic direction of the pedal simulator 4 are respectively flexibly connected with the pedal arm 2 and the pedal support 1, so that the pedal simulator 4 will follow the rotation of the pedal arm 2 when the pedal arm 2 rotates, that is, the included angle α between the mounting surface 11 and the central axis 41 changes. In this embodiment, the two ends of the telescopic direction of the pedal simulator 4 are respectively universally rotatably connected with the pedal arm 2 and the pedal support 1. In this way, when the pedal arm 4 rotates, the rotation of the pedal simulator 4 is more flexible, and the pedal simulator 4 can be prevented from blocking the rotation of the pedal arm 2, so that normal braking cannot be achieved.

[0041] As shown in Figure 4 and Figure 5 The pedal simulator 4 includes an upper shell 42, a lower shell 43, and an elastic assembly arranged between the upper shell 41 and the lower shell 42. The upper shell 42 is slidably arranged on the lower shell 43 along the extension direction of the central axis 41. The sliding of the upper shell 42 relative to the lower shell 43 along the extension direction of the central axis 41 causes the pedal simulator 4 to telescope. The end of the upper shell 42 away from the lower shell 43 is universally rotatably connected with the pedal arm 2, and the end of the lower shell 43 away from the upper shell 42 is universally rotatably connected with the pedal support 1.

[0042] Specifically, one of the end of the upper shell 42 away from the lower shell 43 and the pedal arm 2 is provided with a first ball head 22, and the other is provided with a first ball socket 421 matched with the first ball head 22. The first ball head 22 is universally rotatably arranged in the first ball socket 421, and the ball centers of the first ball head 22 and the first ball socket 421 are located on the central axis 41.

[0043] The pedal support 1 is fixedly provided with a seat body 13. One of the end of the lower shell 43 away from the upper shell 42 and the seat body 13 is provided with a second ball head 431, and the other is provided with a second ball socket 131 matched with the second ball head 431. The second ball head 431 is universally rotatably arranged in the second ball socket 131, and the ball centers of the second ball head 431 and the second ball socket 131 are located on the central axis 41. The seat body 13 and the pedal support 1 can be integrally arranged; the seat body 13 and the pedal support 1 can also be independently arranged and fixedly connected through a connecting piece.

[0044] That is, the ball head and the ball socket are matched between the pedal simulator 4 and the pedal arm 2 and between the pedal simulator 4 and the pedal support 1, so that the centering effect is good, and the vibration of the pedal simulator 4 during the movement of the pedal arm 2 can be reduced.

[0045] The pedal simulator 4 further comprises a piston 44 and a hysteresis assembly arranged between the upper housing 42 and the lower housing 43, the elastic assembly comprising a first elastic component 45 abutting against the piston 44 and the upper housing 42, and a second elastic component 46 abutting against the piston 44 and the lower housing 43, wherein one of the first elastic component 45 and the second elastic component 46 compresses to form an elastic force smaller than the initial force of the other. The hysteresis assembly comprises a wedge-shaped friction block 47, wherein the friction block 47 forms a slope from the inner side and abuts against the piston 44, and from the outer side abuts against the inner wall of the upper housing 42 or / and the lower housing 43. In this way, when the user steps on the pedal arm 2, the upper housing 42 moves downward, one of the first elastic component 45 and the second elastic component 46 deforms and synchronously drives the friction block 47 to move downward or upward, the friction force formed between the friction block 47 and the piston 44 gradually increases, and as the upper housing 42 or the lower housing 43 abuts against the piston 44, the other of the first elastic component 45 and the second elastic component 46 deforms and forms a counterforce, thereby simulating the hysteresis force effect of a mechanical pedal.

[0046] The electronic pedal structure further comprises a sensor assembly for detecting the rotation angle of the pedal arm 2. The sensor assembly comprises a sensing rotor 51 fixedly arranged at the end of the pedal shaft 3, and an angle sensor 52 fixedly arranged on the pedal support 1, and the installation position of the angle sensor 52 on the pedal support 1 corresponds to the position of the sensing rotor 51, and the sensing rotor 51 and the angle sensor 52 are inductive cooperation.

[0047] In this embodiment, when the driver applies force to the pedal arm 2 and rotates it, the pedal shaft 3 and the sensing rotor 51 rotate synchronously, causing a change in the magnetic field, and the angle sensor 52 generates a corresponding electrical signal according to the change in the magnetic field, i.e. the rotation angle signal of the pedal arm 2, which is output to the controller of the electronic mechanical brake system for calculating and identifying the deceleration intention of the driver, thereby achieving accurate brake control.

[0048] The sensor assembly can be arranged at any one of the left and right ends of the pedal shaft 3 as needed.

[0049] Alternatively, the sensor assembly can also be arranged at both left and right ends of the pedal shaft 3. When the driver steps on the pedal arm 2 to rotate it, the two angle sensors 52 synchronously send the rotation angle signal of the pedal arm 2 to the controller of the electronic mechanical brake system. When any one of the sensor assemblies fails, the controller of the electronic mechanical brake system can still obtain the rotation angle of the pedal shaft 3 through the other normal sensor assembly, and then identify the deceleration intention of the driver, thereby achieving accurate brake control.

[0050] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. An electronic pedal structure for brake-by-wire, comprising a pedal bracket and a pedal arm rotatably connected to the pedal bracket by a pedal shaft, characterized in that: The pedal simulator is arranged below the pedal arm and has a central axis, the pedal simulator can be extended along the extension direction of the central axis, the two ends of the extension direction of the pedal simulator are respectively flexibly connected with the pedal arm and the pedal support, the pedal support has a mounting surface, the included angle between the mounting surface and the central axis is 80-100°, and the projections of the pedal shaft and the pedal simulator on the plane where the mounting surface is located are staggered.

2. The electronic brake-by-wire pedal structure for brake-by-wire according to claim 1, characterized by: The included angle between the mounting surface and the central axis is 90°.

3. The electronic pedal structure for brake-by-wire, according to claim 1, characterized in that: The pedal support is provided with mounting holes, the positions of the mounting holes correspond to the mounting positions of the EHB brake pedal on the automobile, the pedal support is provided with four mounting holes, the centers of the four mounting holes are sequentially connected to form a quadrilateral structure, and the mounting position of the pedal simulator on the pedal support is located in the middle of the quadrilateral structure.

4. The electronic pedal structure for brake-by-wire, according to claim 3, characterized in that: The part where the pedal arm is mounted with the pedal simulator is provided with protrusions which protrude to the left and right and to the outside of the pedal arm, the protrusions extend from the upper end surface to the lower end surface of the pedal arm, the protrusions are located on the inside of the quadrilateral structure, and the projections of the protrusions on the plane where the mounting surface is located are staggered with the positions of the mounting holes.

5. The electronic pedal structure for brake-by-wire, according to claim 1, characterized in that: The pedal simulator comprises an upper shell, a lower shell and an elastic assembly arranged between the upper shell and the lower shell, the upper shell can be slidably arranged on the lower shell along the extension direction of the central axis, the upper shell slides relative to the lower shell along the extension direction of the central axis to make the pedal simulator extend or retract, the end of the upper shell away from the lower shell is universally connected with the pedal arm, and the end of the lower shell away from the upper shell is universally connected with the pedal support.

6. The electronic brake-by-wire pedal structure for brake-by-wire according to claim 5, characterized in that: The end of one of the pedal arm and the pedal support away from the other is provided with a first ball head, and the other is provided with a first ball socket matched with the first ball head, the first ball head is universally arranged in the first ball socket, and the ball centers of the first ball head and the first ball socket are located on the central axis.

7. The electronic pedal structure for brake-by-wire, according to claim 5, characterized in that: The end of one of the pedal support and the pedal arm away from the other is provided with a second ball head, and the other is provided with a second ball socket matched with the second ball head, the second ball head is universally arranged in the second ball socket, and the ball centers of the second ball head and the second ball socket are located on the central axis.

8. The electronic brake-by-wire pedal structure for brake-by-wire according to claim 5, characterized by: The pedal simulator further comprises a piston and a hysteresis assembly arranged between the upper shell and the lower shell, the elastic assembly comprises a first elastic component abutting between the piston and the upper shell and a second elastic component abutting between the piston and the lower shell, the elastic force generated by the compression of one of the first elastic component and the second elastic component is smaller than the initial force of the other, and the hysteresis assembly comprises a wedge-shaped friction block which forms a slope from the inside and abuts on the piston and abuts on the inner wall of the upper shell or / and the lower shell from the outside.

9. The electronic pedal structure for brake-by-wire, according to claim 1, characterized in that: The pedal arm is connected with the pedal shaft in an interference fit, and an anti-rotation structure is arranged between the pedal arm and the pedal shaft, and the pedal shaft is rotatably connected to the pedal support.

10. The electronic pedal structure for brake-by-wire, according to claim 9, characterized in that: The electronic pedal structure further comprises a sensor assembly for detecting the rotation angle of the pedal arm, the sensor assembly comprising a sensing rotor fixed to the end of the pedal shaft and an angle sensor fixed to the pedal support, the position of the angle sensor corresponding to the position of the sensing rotor, and the sensing rotor and the angle sensor being in sensing cooperation; The sensor assembly is arranged at any one of the left and right ends of the pedal shaft, or the sensor assembly is arranged at both ends of the pedal shaft.

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