Brake-by-wire pedal and vehicle equipped with brake-by-wire pedal

Abstract

The utility model relates to a brake-by-wire pedal and a vehicle provided with the brake-by-wire pedal. The brake-by-wire pedal comprises a controller, a brake-by-wire pedal and a brake-by-wire pedal, a mounting seat; the brake pedal arm is rotatably mounted on the mounting seat; the sensor assembly is mounted on the mounting seat, is electrically connected to the controller, and can generate at least one trigger signal when sensing the rotation of the brake pedal arm; the first end of the first elastic assembly is connected to the upper portion of the brake pedal arm, the second end of the first elastic assembly is connected to the lower portion of the installation base, and the first elastic assembly can provide first elastic force for the brake pedal arm. According to the utility model, the overall occupied space and weight of the brake device can be reduced, and the cost is saved. In addition, the stability of a reaction force counteracting on the brake pedal arm can be improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to a brake-by-wire pedal and a vehicle equipped with the brake-by-wire pedal. Background Art

[0002] In existing vehicle brakes, the brake pedal needs to be connected to an integrated electric booster (IEB). The IEB includes at least a controller, an electric motor, and a sensor. The sensor can sense the pedaling stroke and transmit the pedaling stroke to the controller. The controller can calculate the required braking force for the vehicle and the required feedback reaction force based on the pedaling stroke. The IEB provides this reaction force through the electric motor, which reacts on the brake pedal arm and then feeds the reaction force back to the driver's foot. This solution has at least the following disadvantages:

[0003] (1) The feedback reaction force must be determined based on the pedal stroke detected by the sensor. Problems with the sensor or controller will result in errors in the determined reaction force. Furthermore, problems with the motor will directly lead to errors in the reaction force acting on the brake pedal arm. Therefore, the reaction force provided by this solution is less stable.

[0004] (2) The electric motor takes up a large space and is relatively heavy and expensive.

[0005] The information disclosed in the background section of the present invention is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0006] The present invention aims to provide a brake-by-wire pedal and a vehicle equipped with the brake-by-wire pedal, which can reduce the space and weight occupied by the entire brake device and save costs. In addition, the stability of the reaction force acting on the brake pedal arm can be improved.

[0007] According to a first aspect of the present utility model, a wire-controlled brake pedal is provided, comprising: a controller; a mounting base; a brake pedal arm, which can be rotatably mounted to the mounting base; a sensor assembly, which is mounted on the mounting base and electrically connected to the controller, and can generate at least one trigger signal when sensing the rotation of the brake pedal arm; and a first elastic assembly, a first end of which is connected to the upper part of the brake pedal arm, a second end of which is connected to the lower part of the mounting base, and can provide a first elastic force to the brake pedal arm.

[0008] Preferably, the brake pedal arm is mounted on the mounting base at a position near the top thereof via a first mounting shaft and is capable of rotating together with the first mounting shaft around the axis of the first mounting shaft. The sensor assembly includes: a base on which a first sensor and a second sensor are mounted; a cover plate mounted to the mounting base and forming a sensor housing with the base; a first bracket fixed to the first mounting shaft, passing through the cover plate, and capable of rotating relative to the cover plate, the first bracket being mounted with a first magnetic component corresponding to the first sensor, the first sensor being capable of generating a first trigger signal when sensing rotation of the first magnetic component; and a second bracket mounted to the mounting base, passing through the cover plate, and capable of rotating relative to the cover plate, the second bracket being mounted with a second magnetic component corresponding to the second sensor, the second sensor being capable of generating a second trigger signal when sensing rotation of the second magnetic component; wherein the first bracket is provided with a guide post on an outer edge in a radial direction thereof, and the second bracket is provided with a guide plate extending outward in a radial direction, the guide plate having an elongated slot, the guide post being located in the elongated slot and being capable of sliding along the elongated slot.

[0009] Preferably, the sensor assembly further includes: a PCB board, which is arranged in the sensor housing and electrically connected to the controller, the first sensor and the second sensor are mounted on the PCB board, and the first trigger signal and the second trigger signal are sent to the controller via the PCB board.

[0010] Preferably, the first elastic component includes: a first mounting shell having a first mounting cavity therein, the first mounting cavity having a first end wall close to the brake pedal arm and a second end wall away from the brake pedal arm; a first sliding member and a second sliding member, which can be slidably mounted in the first mounting cavity, the first sliding member being closer to the brake pedal arm than the second sliding member; a first elastic member, a first end of which is connected to the first sliding member, and a second end of which is connected to the second end wall after passing through the second sliding member; a second elastic member, a first end of which is connected to the second sliding member, and a second end of which is connected to the second end wall; and a connecting rod, a first end of which is connected to the brake pedal arm through a second mounting shaft, and a second end of which passes through the first end wall and is fixed to the first sliding member.

[0011] Preferably, the wire-controlled brake pedal further includes a hysteresis seat, which has a matching surface; the brake pedal arm has a second mounting shell, the second mounting shell has a first end away from the mounting seat and a second end close to the mounting seat, the second end of the second mounting shell has an opening, and a second elastic component is installed in the second mounting shell; the second elastic component includes: a third sliding member, which is arranged at the opening and contacts with the at least one matching surface; and a third elastic member, whose first end abuts against the first end of the second mounting shell, and the second end of the third elastic member is connected to the third sliding member so that the third sliding member can abut against the matching surface.

[0012] Preferably, the matching surface gradually moves away from the first installation axis from top to bottom.

[0013] Preferably, the matching surface includes a first inclined surface and a second inclined surface, the second inclined surface is located above the first inclined surface, and the absolute value of the slope of the first inclined surface is greater than the absolute value of the slope of the second inclined surface; the third sliding member can slide along the first inclined surface and the second inclined surface.

[0014] Preferably, the brake-by-wire pedal further comprises a limiting washer, which is arranged on a side of the mounting seat facing the brake pedal arm.

[0015] Preferably, the controller is integrated into the sensor assembly and mounted on the PCB board.

[0016] According to a second aspect of the present invention, a vehicle is provided, equipped with the brake-by-wire pedal as described in the first aspect.

[0017] The brake-by-wire pedal of this utility model includes a sensor assembly and a first elastic assembly. A trigger signal generated by the sensor assembly is used to control vehicle braking. The first elastic force of the first elastic assembly provides a reaction force on the brake pedal arm, eliminating the need for an electric motor, thereby reducing the overall space and weight of the braking system and saving costs. Furthermore, the reaction force on the brake pedal arm no longer relies on the sensor assembly, controller, or electric motor, but rather on the purely mechanical structure of the first elastic assembly, thereby improving stability.

[0018] Furthermore, using two sensors to jointly sense the rotation angle can avoid inaccurate sensing by a single sensor.

[0019] Furthermore, a hysteresis seat with a matching surface is provided so that the pedaling force in the two processes of releasing and stepping down is different, which can facilitate the driver to distinguish between the two actions of releasing and stepping down and prevent misoperation.

[0020] The device of the present invention has other features and advantages, which will be obvious from the drawings and subsequent embodiments incorporated herein, or will be described in detail in the drawings and subsequent embodiments incorporated herein, which together are used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a wire-controlled brake pedal according to an embodiment of the present invention;

[0022] Figure 2A This is a front view of the brake-by-wire pedal;

[0023] Figure 2B for Figure 2A Cross-section at AA;

[0024] Figure 3 This is a three-dimensional exploded view of the brake-by-wire pedal;

[0025] Figure 4 It is a three-dimensional exploded view of the sensor assembly;

[0026] Figure 5A is a schematic diagram of the coordination between the first bracket and the second bracket;

[0027] Figure 5B Schematic diagram of the installation of the first bracket and the second bracket;

[0028] Figure 5C is a schematic diagram of the cooperation between the first sensor and the first magnetic component;

[0029] Figure 6A is a schematic diagram of a first state of the first elastic component;

[0030] Figure 6B is a schematic diagram of the second state of the first elastic component;

[0031] Figure 6C is a schematic diagram of the third state of the first elastic component;

[0032] Figure 6D is a schematic diagram of the fourth state of the first elastic component;

[0033] Figure 7A is a schematic diagram of a first state of the second elastic component;

[0034] Figure 7B is a schematic diagram of a second state of the second elastic component;

[0035] Figure 7C is a schematic diagram of the third state of the second elastic component;

[0036] Figure 8Ais a schematic diagram of a first state of a brake-by-wire pedal;

[0037] Figure 8B for Figure 8A Schematic diagram of the status of the sensor component;

[0038] Figure 9A is a schematic diagram of a second state of a brake-by-wire pedal;

[0039] Figure 9B for Figure 9A Schematic diagram of the status of the sensor component;

[0040] Figure 10A is a schematic diagram of the third state of the brake-by-wire pedal;

[0041] Figure 10B for Figure 10A Schematic diagram of the status of the sensor component;

[0042] Figure 11A This is a force analysis diagram when the third sliding member slides upward;

[0043] Figure 11B is a force analysis diagram when the third sliding member slides downward;

[0044] Figure 12 Schematic diagram of the relationship between the pedaling force and the brake pedal arm.

[0045] Description of reference numerals:

[0046] 100. Controller;

[0047] 200, mounting seat;

[0048] 300, brake pedal arm; 301, pedal portion; 302, first mounting shaft; 303, second mounting housing; 304, opening; 305, first end; 306, second end; 307, stopper; 308, second mounting shaft;

[0049] 400, sensor assembly;

[0050] 420, base; 421, first sensor; 422, second sensor;

[0051] 410, cover plate;

[0052] 430, first bracket; 431, first magnetic component; 432, guide post; 433, first shaft; 434, first mounting plate;

[0053] 440, second bracket; 441, second magnetic component; 442, guide plate; 443, long slot; 444, second shaft; 445, second mounting plate;

[0054] 450, PCB board;

[0055] 500, first elastic component;

[0056] 510, first mounting housing; 511, first mounting cavity; 512, first end wall; 513, second end wall;

[0057] 520, first sliding member;

[0058] 530, second sliding member;

[0059] 540, first elastic member;

[0060] 550, second elastic member;

[0061] 560, connecting rod;

[0062] 600, hysteresis seat; 610, matching surface; 611, first inclined surface; 612, second inclined surface; 613, inflection point;

[0063] 700, second elastic component; 710, third sliding member; 720, third elastic member.

[0064] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of the present invention. The specific design features disclosed in the present invention (including, for example, specific dimensions, directions, positions, and shapes) will be determined in part by the specific environment in which the invention is to be applied and used.

[0065] In the figures, like reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. DETAILED DESCRIPTION

[0066] Reference will now be made in detail to various embodiments of the present invention, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with the exemplary embodiments, it should be understood that this description is not intended to limit the present invention to these exemplary embodiments. On the contrary, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit of the present invention and the scope defined by the appended claims.

[0067] The following combination Figures 1 to 12 A brake-by-wire pedal according to an embodiment of the present invention will be described.

[0068] like Figures 1 to 3As shown, the brake-by-wire pedal according to the embodiment of the present invention includes: a controller 100 , a mounting seat 200 , a brake pedal arm 300 , a sensor assembly 400 and a first elastic assembly 500 .

[0069] The brake pedal arm 300 is rotatably mounted to the mounting seat 200 and has a stepped portion 301 .

[0070] The sensor assembly 400 is mounted on the mounting base 200 and electrically connected to the controller 100 , and is capable of generating at least one trigger signal when sensing the rotation of the brake pedal arm 300 , the trigger signal including the rotation angle of the brake pedal arm 300 .

[0071] The first elastic component 500 has a first end connected to the upper portion of the brake pedal arm 300 , a second end connected to the lower portion of the mounting seat 200 , and can provide a first elastic force to the brake pedal arm 300 .

[0072] The present embodiment of the present invention incorporates a sensor assembly 400 and a first elastic assembly 500 in the brake-by-wire control pedal. The trigger signal generated by the sensor assembly 400 can be used to control vehicle braking. The first elastic force of the first elastic assembly 500 acts as a reaction force on the brake pedal arm 300, eliminating the need for an electric motor. This reduces the overall space and weight of the brake system, thereby saving costs. Furthermore, the reaction force on the brake pedal arm 300 no longer relies on the sensor assembly 400, controller 100, and electric motor, but instead relies on the purely mechanical structure of the first elastic assembly 500, improving stability.

[0073] Both the mounting base 200 and the brake pedal arm 300 may be made of plastic material to further reduce weight.

[0074] In an exemplary embodiment, the brake pedal arm 300 is mounted near its top by a first mounting shaft 302 (see Figure 5B ) is installed on the mounting base 200 and can rotate around the axis y1 of the first mounting shaft 302 together with the first mounting shaft 302.

[0075] like Figure 4 As shown, the sensor assembly 400 includes a base 420, a cover 410, a first bracket 430, and a second bracket 440. The base 420 is mounted with a first sensor 421 and a second sensor 422. The cover 410 is mounted to the mounting base 200 and forms a sensor housing with the base 420.

[0076] like Figure 5A 、 Figure 5B and Figure 5CAs shown, the first bracket 430 is fixed to the first mounting shaft 302, passes through the cover 410, and is rotatable relative to the cover 410. The first bracket 430 is mounted with a first magnetic component 431 corresponding to the first sensor 421. The first sensor 421 is capable of generating a first trigger signal when sensing the rotation of the first magnetic component 431.

[0077] Specifically, if Figure 4 and Figure 5A As shown, the first bracket 430 includes a first shaft 433 and a first mounting plate 434. The first shaft 433 is fixed to the first mounting shaft 302 and passes through the cover plate 410. The axis y2 of the first shaft 433 coincides with the axis y1 of the first mounting shaft 302. The first mounting plate 434 is circular and can rotate together with the first shaft 433 about the axis of the first shaft 433 (i.e., about the axis y1 of the first mounting shaft 302). The first magnetic component 431 is mounted at the center of the first mounting plate 434.

[0078] The second bracket 440 is mounted to the mounting base 200, passes through the cover plate 410, and is rotatable relative to the cover plate 410. The second bracket 440 is mounted with a second magnetic component 441 corresponding to the second sensor 422 and has a guide plate 442 extending radially outward and having an elongated slot 443. The first bracket 430 has a guide post 432 disposed on the outer edge of the first mounting plate 434. The guide post 432 is located within the elongated slot 443 and is slidable along the elongated slot 443. The second sensor 422 is capable of generating a second trigger signal upon sensing rotation of the second magnetic component 441.

[0079] Specifically, if Figure 4 and Figure 5A As shown, the second bracket 440 includes a second shaft 444 and a second mounting plate 445. The second shaft 444 is mounted to the mounting base 200 and passes through the cover plate 410. The second mounting plate 445 is circular and can rotate together with the second shaft 444 around the axis of the second shaft 444. The guide plate 442 is provided on the outer edge of the second mounting plate 445, and the second magnetic component 441 is mounted at the center of the second mounting plate 445.

[0080] like Figure 5A As shown, when the first bracket 430 is rotated in the first direction (ie, Figure 5AWhen the guide post 432 rotates along the first mounting shaft 302 (i.e., the axis y2 of the first shaft 433) in the direction of the arrow P in the figure, the guide post 432 rotates along the first rotation direction along with the first bracket 430. Due to the matching relationship between the guide post 432 and the long slot 443, while rotating along the first rotation direction, the guide post 432 will also slide along the long slot 443 toward the second mounting plate 445, and drive the guide plate 442 and the first bracket 430 to rotate along the second rotation direction (i.e., Figure 5A The first bracket 430 rotates along the first rotation direction and the second bracket 440 also rotates along the second rotation direction.

[0081] The above-mentioned movement relationship between the first bracket 430 and the second bracket 440 enables the first magnetic component 431 and the second magnetic component 441 to rotate simultaneously, so that when the first sensor 421 senses the rotation of the first magnetic component 431, the second sensor 422 can also sense the rotation of the second magnetic component 441, that is, the first trigger signal and the second trigger signal can be generated simultaneously.

[0082] The coordinated working structure of the first bracket 430 and the second bracket 440 is simple, can save space, and reduce costs.

[0083] The controller 100 can obtain the braking state based on the first trigger signal and / or the second trigger signal to control the braking of the vehicle. Specifically, the braking state includes at least the rotation angle of the first magnetic component 431, the rotation angle of the first bracket 430 (i.e., the rotation angle of the brake pedal arm 300), the rotation angle of the second magnetic component 441, and the rotation angle of the second bracket 440.

[0084] In an exemplary embodiment, Figure 4 and Figure 5C As shown, the sensor assembly 400 further includes a PCB board 450, which is disposed within the sensor housing and fixed to the base 420 and electrically connected to the controller 100. A first sensor 421 and a second sensor 422 are mounted on the PCB board 450. A first trigger signal generated by the first sensor 421 and a second trigger signal generated by the second sensor 422 are transmitted to the controller 100 via the PCB board 450.

[0085] The controller 100 may be integrated with an onboard computer, or provided separately, or integrated within the sensor assembly 400. The controller 100 may calculate the braking force required to brake the vehicle based on the first trigger signal and / or the second trigger signal.

[0086] In an exemplary embodiment, 6A to 6DAs shown, the first elastic assembly 500 includes a first mounting housing 510 , a first sliding member 520 , a second sliding member 530 , a first elastic member 540 , a second elastic member 550 and a connecting rod 560 .

[0087] The first mounting housing 510 defines a first mounting cavity 511 therein. The first mounting cavity 511 includes a first end wall 512 proximal to the brake pedal arm 300 and a second end wall 513 distal to the brake pedal arm 300. The second end wall 513 can be in the form of an end cap and can be removably mounted on the first mounting housing 510, thereby facilitating the installation of the first and second sliding members 520, 530, and the first and second elastic members 540, 550.

[0088] The first sliding member 520 and the second sliding member 530 are slidably installed in the first installation cavity 511 , that is, the first sliding member 520 and the second sliding member 530 can slide along the first installation cavity 511 . In addition, the first sliding member 520 is closer to the brake pedal arm 300 than the second sliding member 530 .

[0089] A first end of the first elastic member 540 is connected to the first sliding member 520 , and a second end of the first elastic member 540 passes through the second sliding member 530 and is connected to the second end wall 513 .

[0090] The first end of the second elastic member 550 is connected to the second sliding member 530, and the second end of the second elastic member 550 is connected to the second end wall 513. The first elastic member 540 and the second elastic member 550 can be coil springs, but their types are not limited to this. They can be any form in the prior art as long as they can achieve the above functions.

[0091] A first end of the connecting rod 560 is connected to the brake pedal arm 300 via the second mounting shaft 308 , and a second end of the connecting rod 560 passes through the first end wall 512 and is fixed to the first sliding member 520 . The connecting rod 560 is rotatable around the second mounting shaft 308 .

[0092] When the brake pedal arm 300 rotates in the first rotational direction, it pushes the connecting rod 560 and the first sliding member 520 to move toward the second end wall 513, compressing the first elastic member 540 during the movement. After the first sliding member 520 moves a certain distance, it contacts the second sliding member 530 and pushes the second sliding member 530 to move toward the second end wall 513. As the second sliding member 530 moves toward the second end wall 513, it compresses the second elastic member 550.

[0093] In an exemplary embodiment, Figure 3 、 7A to 7CAs shown, the brake-by-wire pedal according to the embodiment of the present invention further includes a hysteresis seat 600 , and the hysteresis seat 600 has a matching surface 610 .

[0094] In an exemplary embodiment, 7A to 7C As shown, the brake pedal arm 300 has a second mounting housing 303. The second mounting housing 303 has a first end 305 away from the mounting base 200 and a second end 306 close to the mounting base 200. The second end 306 of the second mounting housing 303 has an opening 304. A second elastic component 700 is mounted in the second mounting housing 303. The second elastic component 700 can provide a second elastic force to the brake pedal arm 300.

[0095] The second elastic assembly 700 includes a third sliding member 710 and a third elastic component 720. The third sliding member 710 is positioned at the opening 304 and contacts the at least one mating surface 610. The first end of the third elastic component 720 abuts the first end 305 of the second mounting housing 303. The second end of the third elastic component 720 is connected to the third sliding member 710, enabling the third sliding member 710 to abut the mating surface 610. The third elastic component 720 may be a coil spring, but its type is not limited to this. It may be any type known in the art, as long as it can achieve the aforementioned functions.

[0096] The first elastic force provided by the first elastic component 500 to the brake pedal arm 300 is a main elastic force, and the second elastic force provided by the second elastic component 700 to the brake pedal arm 300 is an auxiliary elastic force.

[0097] In an exemplary embodiment, Figure 7A As shown, the mating surface 610 gradually moves away from the first mounting axis 302 along a top-to-bottom direction.

[0098] In an exemplary embodiment, Figure 7A As shown, the matching surface 610 includes a first inclined surface 611 and a second inclined surface 612. The second inclined surface 612 is located above the first inclined surface 611. The absolute value of the slope of the first inclined surface 611 is greater than the absolute value of the slope of the second inclined surface 612. The intersection of the first inclined surface 611 and the second inclined surface 612 is an inflection point 613.

[0099] The third sliding member 710 can slide along the first inclined surface 611 and the second inclined surface 612 .

[0100] In an exemplary embodiment, Figure 1 and Figure 3 As shown, the brake-by-wire pedal further includes a limiting washer 307 , which is disposed on a side of the mounting base 200 facing the brake pedal arm 300 . The limiting washer 307 can limit the maximum travel of the brake pedal arm 300 .

[0101] Furthermore, the limiting gasket 307 is made of rubber material, which can reduce the noise when the brake pedal arm 300 collides with the mounting seat 200 .

[0102] The embodiment of the present invention further provides a vehicle equipped with the aforementioned brake-by-wire pedal.

[0103] The vehicle further includes a brake light. The controller 100 is electrically connected to the brake light. The brake light can operate under the control of the controller 100 , that is, the brake light emits light.

[0104] The vehicle further includes an instrument panel, to which the controller 100 is electrically connected. The controller 100 is capable of generating a warning signal and sending the warning signal to the instrument panel, thereby notifying the driver that a problem occurs with the sensor assembly 400.

[0105] The vehicle further includes an electro-mechanical brake (EMB) provided at each wheel. The controller 100 is electrically connected to the EMB and controls braking of the wheel through the EMB.

[0106] Other structures and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail to reduce redundancy.

[0107] The operation of the wire-controlled brake pedal according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0108] When the driver's foot steps on the pedal portion 301, the pedal portion 301 exerts a reaction force on the driver's foot. This reaction force, felt by the driver, is the pedaling force. This reaction force originates from the resistance experienced by the brake pedal arm 300 during its rotation. This resistance primarily consists of two components: the first component comprises the first elastic force provided by the first elastic component 500 to the brake pedal arm 300, and the second component comprises the second elastic force provided by the second elastic component 700 to the brake pedal arm 300, as well as a portion of the force applied by the mating surface 610. The first elastic force is the primary resistance.

[0109] In the initial state, that is, when the foot just contacts the pedal portion 301 and has not stepped down, the second elastic member 550 of the first elastic assembly 500 is in a natural state, and the first elastic member 540 is in a compressed state (see Figure 6A The third elastic member 720 of the second elastic assembly 700 is in a compressed state, and the third sliding member 710 abuts against the first inclined surface 611. The guide post 432 of the first bracket 430 is located at the position of the second bracket 440 farthest from the second shaft 444.

[0110] The driver's pedaling action pushes the brake pedal arm 300 in the first rotation direction (ie, Figure 8A and Figure 8B The brake pedal arm 300 rotates around the axis y1 of the first mounting shaft 302 (in the direction of the arrow P). This rotation process primarily involves four changes: the expansion and contraction of the first elastic component 500, the expansion and contraction of the second elastic component 700, the relative sliding of the second elastic component 700 and the hysteresis seat 600, and the relative rotation of the first bracket 430 and the second bracket 440. Furthermore, the brake pedal arm 300 has two node positions within its pedal stroke, specifically a first node position x1 and a second node position x2 (see also FIG. 2 ). Figure 12 ), wherein the first node position x1 is the position where the first sliding member 520 and the second sliding member 530 just begin to contact, and the second node position x2 is the position where the third sliding member 710 of the second elastic component 700 slides to the inflection point 613 of the matching surface 610. Figure 12 As shown, the brake pedal arm 300 rotates from the initial position to the first node position x1 as the first stage, the brake pedal arm 300 rotates from the first node position x1 to the second node position x2 as the second stage, and the brake pedal arm 300 rotates from the second node position x2 to the maximum position x3 as the third stage.

[0111] In the first stage, the brake pedal arm 300 pushes the first sliding member 520 to move in a direction close to the second end wall 513 and further compresses the first elastic member 540 (see Figure 6A 、 Figure 6B ). The further compressed first elastic member 540 provides a force F1 that reacts against the brake pedal arm 300. At this time, the first elastic force provided by the first elastic component 500 to react against the brake pedal arm 300 is only F1.

[0112] As the pedal stroke of the brake pedal arm 300 increases, the first sliding member 520 contacts the second sliding member 530 (see Figure 6C ) and push the second sliding member 530 to move along the direction close to the second end wall 513 (see Figure 6D ), at this time, the pedaling stroke of the brake pedal arm 300 enters the second stage. During the movement of the second sliding member 530 in the direction close to the second end wall 513, the second sliding member 530 compresses the second elastic member 550. The compressed second elastic member 550 provides a force F2 that reacts to the brake pedal arm 300. At this time, the first elastic force provided by the first elastic component 500 to react to the brake pedal arm 300 is F1+F2. This further increases the pedaling force within the unit pedaling stroke, so in Figure 12 The slope of the pedaling force curve in the second stage is greater than that in the first stage.

[0113] In the first stage and the second stage, the second elastic assembly 700 rotates along the first rotation direction, so that the third sliding member 710 slides upward along the first inclined surface 611 and gradually compresses the third elastic component 720 .

[0114] As the pedal stroke of the brake pedal arm 300 continues to increase, the third sliding member 710 slides to the second inclined surface 612 through the inflection point 613 and continues to slide upward along the second inclined surface 612 . At this time, the pedal stroke of the brake pedal arm 300 enters the third stage.

[0115] Since the absolute value of the slope of the first inclined surface 611 is greater than the absolute value of the slope of the second inclined surface 612, within a unit pedaling stroke, the degree of compression of the third elastic member 720 when sliding along the second inclined surface 612 is greater than the degree of compression of the third elastic member 720 when sliding along the first inclined surface 611, so that the reaction force provided by the third elastic member 720 within the unit pedaling stroke is greater, thereby increasing the pedaling force within the unit pedaling stroke. Figure 12 The pedaling force curve in the third stage is more inclined than that in the second stage.

[0116] So far, we've described the overall evolution of pedal force. The differences in force across the three stages provide the driver with clear feedback, allowing them to intuitively sense how deeply they're pressing the brake pedal and the desired braking effect, such as light braking, heavy braking, and sudden braking.

[0117] Regardless of the stage, the first elastic component 500 and the second elastic component 700 provide the reaction force, thereby improving the stability of the reaction force.

[0118] The following describes the changes in pedaling force during the release and downward pedaling processes.

[0119] When the brake pedal arm 300 is depressed downward, the third slider 710 slides upward along the first and second slopes 611 and 612 . When the brake pedal arm 300 is released, the third slider 710 slides downward along the first and second slopes 611 and 612 .

[0120] like Figure 11A As shown, when the third sliding member 710 slides upward along the first inclined surface 611, the first inclined surface 611 provides the third sliding member 710 with a supporting force F perpendicular to the first inclined surface 611. n , support force F n Can be decomposed into the component force F s and component force F r , where the force F s It can just offset the elastic force provided by the third elastic member 720, and the force F rThis just blocks the third sliding member 710 from moving upward.

[0121] When sliding upward, the first inclined surface 611 generates a sliding friction force F along the first inclined surface 611 downward. f , F f The size of is positively correlated with the friction coefficient and the deformation of the third elastic member 720.

[0122] When sliding upward, the F generated by the first inclined surface 611 f and F r Both of them are downward, so that these two forces hinder the third sliding member 710 from sliding upward.

[0123] For the same position, when the third elastic member 720 slides downward along the first inclined surface 611, F r Still downward, it becomes a force to help the third elastic member 720 slide downward, and F f Upward (see Figure 11B ), is still the resistance to sliding. At this time, F r It will offset some of the F f Therefore, the resistance received by the brake pedal arm 300 during the downward sliding process will become smaller. That is, at the same position, the pedaling force during the release process (reference Figure 12 The pedaling force curve C2 in the downward pedaling process is smaller than the pedaling force (reference Figure 12 The same principle and force analysis also apply to the second inclined surface 612. That is, the pedaling force during the release and downward pedaling processes is different, which can help the driver distinguish between the release and downward pedaling actions and prevent misoperation.

[0124] The working process and principle of the sensor assembly 400 are introduced below.

[0125] When the brake pedal arm 300 and the first mounting shaft 302 are rotated in the first direction (ie, Figure 8A and Figure 8B When the first mounting shaft 302 (i.e., the axis y2 of the first shaft 433) is rotated in the direction of the arrow P in the figure, the first bracket 430 and the second bracket 440 are driven to rotate simultaneously in opposite directions, thereby driving the first magnetic component 431 and the second magnetic component 441 to rotate simultaneously.

[0126] like Figure 10A and Figure 10B As shown, when the first magnetic component 431 rotates by an angle of θ, the second magnetic component 441 rotates by an angle of The distance between the guide post 432 and the second axis 444 before and after the rotation is s, the distance between the guide post 432 and the second axis 444 before the rotation is L, and the distance between the guide post 432 and the second axis 444 after the rotation is L'. θ is positively correlated with the pedal stroke, and θ is positively correlated with The quantitative relationship is as follows:

[0127]

[0128] Right now, There is a one-to-one correspondence with θ.

[0129] When both the first sensor 421 and the second sensor 422 are in normal use, the first sensor 421 can generate a first trigger signal corresponding to θ when the first magnetic component 431 rotates and send the first trigger signal to the controller 100, and the second sensor 422 can generate a first trigger signal corresponding to θ when the second magnetic component 441 rotates. The corresponding second trigger signal is sent to the controller 100. The controller 100 calculates the braking force required to brake the vehicle according to the first trigger signal and / or the second trigger signal.

[0130] As mentioned earlier, There is a one-to-one correspondence between θ and θ, so the first trigger signal and the second trigger signal also have a one-to-one correspondence.

[0131] Since θ is positively correlated with the pedal travel, the first sensor 421 can be used as a main sensor and the second sensor 422 can be used as a redundant sensor.

[0132] The controller 100 pre-stores the one-to-one correspondence between the first trigger signal and the second trigger signal. After receiving the first trigger signal and the second trigger signal, the controller 100 compares the first trigger signal and the second trigger signal to determine whether the one-to-one correspondence is satisfied, thereby determining whether the signal is correct. Using the first sensor 421 and the second sensor 422 to jointly sense the rotation angle can avoid inaccurate sensing by a single sensor.

[0133] When it is determined that the first trigger signal and the second trigger signal do not satisfy the one-to-one correspondence, the controller 100 generates a warning signal and sends the warning signal to the instrument panel, thereby notifying the driver that a problem occurs with the sensor assembly 400 .

[0134] In addition, the first angle threshold θ' and the second angle threshold θ' can be pre-stored in the controller 100. When the rotation angle of the first magnetic component 431 is θ', the rotation angle of the second magnetic component 441 is (See also Figure 9A and Figure 9B ).

[0135] Specifically, the controller 100 obtains the first current rotation angle of the first magnetic component 431 based on the first trigger signal and compares the first current rotation angle with a first angle threshold θ'. If the first current rotation angle is less than the first angle threshold θ', the controller 100 does not generate a control signal. If the first current rotation angle is greater than or equal to the first angle threshold θ', the controller generates a control signal to control the brake light to illuminate. The first current rotation angle is the angle at which the first magnetic component 431 rotates from its initial position to its current position.

[0136] When the first sensor 421 is damaged, the signal of the second sensor 422 will be used as a temporary signal.

[0137] That is, when it is determined that the first trigger signal and the second trigger signal do not satisfy the above one-to-one correspondence, in addition to generating a warning signal, the controller 100 also obtains the second current rotation angle of the second magnetic component 441 according to the second trigger signal, and compares the second current rotation angle with the second angle threshold. If the second current rotation angle is less than the second angle threshold The controller 100 does not generate a control signal. If the second current rotation angle is greater than or equal to the second angle threshold The controller 100 generates a control signal to control the brake light to light up. The second current rotation angle is the angle at which the second magnetic component 441 rotates from the initial position to the current position.

[0138] For convenience of explanation and precise definition of the appended claims, the terms "upper", "lower", "inner", "outer", "above", "below", "upper", "lower", "upward", "downward", "front", "back", "behind", "inside", "outside", "inward", "outward", "inner", "exterior", "inner", "external", "forward", and "backward" are used to describe the features of the exemplary embodiments with reference to the positions of such features as shown in the accompanying drawings.

[0139] The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. The foregoing descriptions are not intended to be exhaustive, nor are they intended to limit the present invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described to explain the specific principles of the present invention and its practical application, thereby enabling others skilled in the art to realize and utilize the various exemplary embodiments of the present invention and its various alternatives and modifications. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake-by-wire pedal, characterized in that: include: Controller; Mounting seat; a brake pedal arm rotatably mounted to the mounting seat; a sensor assembly mounted on the mounting base and electrically connected to the controller, and capable of generating at least one trigger signal upon sensing rotation of the brake pedal arm; as well as The first elastic component has a first end connected to the upper portion of the brake pedal arm and a second end connected to the lower portion of the mounting seat, and is capable of providing a first elastic force to the brake pedal arm.

2. The brake-by-wire pedal according to claim 1, characterized in that: The brake pedal arm is mounted on the mounting seat at a position near the top thereof via a first mounting shaft and is capable of rotating together with the first mounting shaft around the axis of the first mounting shaft. The sensor assembly includes: a base, on which the first sensor and the second sensor are installed; a cover plate, which is mounted to the mounting seat and forms a sensor housing with the base; a first bracket fixed to the first mounting shaft, passing through the cover plate, and rotatable relative to the cover plate, the first bracket being mounted with a first magnetic component corresponding to the first sensor, the first sensor being capable of generating a first trigger signal upon sensing rotation of the first magnetic component; and a second bracket mounted to the mounting base, passing through the cover plate, and capable of rotating relative to the cover plate, the second bracket being mounted with a second magnetic component corresponding to the second sensor, the second sensor being capable of generating a second trigger signal when sensing rotation of the second magnetic component; The first bracket is provided with a guide column on its outer edge in the radial direction, and the second bracket is provided with a guide plate extending outward in the radial direction. The guide plate has a long slot, and the guide column is located in the long slot and can slide along the long slot.

3. The brake-by-wire pedal according to claim 2, wherein: The sensor assembly further comprises: A PCB board is arranged in the sensor housing and electrically connected to the controller, the first sensor and the second sensor are mounted on the PCB board, and the first trigger signal and the second trigger signal are sent to the controller via the PCB board.

4. The brake-by-wire pedal according to claim 3, characterized in that: The first elastic component includes: A first mounting housing having a first mounting cavity therein, wherein the first mounting cavity has a first end wall close to the brake pedal arm and a second end wall away from the brake pedal arm; a first sliding member and a second sliding member slidably mounted in the first mounting cavity, the first sliding member being closer to the brake pedal arm than the second sliding member; a first elastic member, a first end of which is connected to the first sliding member, and a second end of which passes through the second sliding member and is connected to the second end wall; a second elastic member having a first end connected to the second slider and a second end connected to the second end wall; and A connecting rod has a first end connected to the brake pedal arm through a second mounting shaft, and a second end passing through the first end wall and fixed to the first sliding member.

5. The brake-by-wire pedal according to claim 2, wherein: It further includes a hysteresis seat having a mating surface; The brake pedal arm has a second mounting housing, the second mounting housing has a first end away from the mounting seat and a second end close to the mounting seat, the second end of the second mounting housing has an opening, and a second elastic component is installed in the second mounting housing; The second elastic component includes: a third sliding member disposed at the opening and in contact with the at least one matching surface; and A first end of the third elastic member abuts against the first end of the second mounting housing, and a second end of the third elastic member is connected to the third sliding member so that the third sliding member can abut against the matching surface.

6. The brake-by-wire pedal according to claim 5, characterized in that: The matching surface gradually moves away from the first installation axis along a direction from top to bottom.

7. The brake-by-wire pedal according to claim 6, wherein: The matching surface includes a first inclined surface and a second inclined surface, the second inclined surface is located above the first inclined surface, and the absolute value of the slope of the first inclined surface is greater than the absolute value of the slope of the second inclined surface; The third sliding member is capable of sliding along the first inclined surface and the second inclined surface.

8. The brake-by-wire pedal according to claim 1, wherein: It further includes a limiting gasket, which is arranged on a side of the mounting seat facing the brake pedal arm.

9. The brake-by-wire pedal according to claim 3, wherein: The controller is integrated into the sensor assembly and mounted on the PCB board.

10. A vehicle, characterized in that: It is equipped with a brake-by-wire pedal according to any one of claims 1 to 9.

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