A type of drive-by-wire pedal

Abstract

This invention discloses a drive-by-wire pedal, comprising a pedal, a housing, an elastic component, and a piston. The housing accommodates the elastic component and the piston. The pedal is fixedly mounted on one end of the piston. The elastic component includes a first elastic element, a second elastic element, and a third elastic element. The first and second elastic elements are connected in series, and the second and third elastic elements are connected in parallel. A displacement sensor is disposed between the pedal and the housing, and a force sensor is disposed between the pedal and the piston. This invention provides a drive-by-wire pedal that, through the cooperation of multiple elastic elements in the elastic component, provides different feedback forces according to different displacement stages of the pedal, thereby providing the driver with better pedal force feedback and facilitating driver control.

Description

Technical Field

[0001] This invention belongs to the field of vehicle technology, and specifically relates to a drive-by-wire pedal. Background Technology

[0002] The steer-by-wire pedal is an important component of the brake-by-wire system, mainly consisting of the brake pedal and pedal sensors. When the driver presses the brake pedal, the pedal sensors detect changes in the pedal's angle, displacement, or force, converting these physical signals into electrical signals, which are then transmitted to the electronic control unit.

[0003] In related technologies, drive-by-wire pedals detect vehicle status through sensors and convert it into electrical or digital signals, which are then sent to the vehicle's control system. The vehicle control system calculates control commands based on preset algorithms and real-time feedback information, and achieves precise control through actuators. However, drive-by-wire pedals in these technologies struggle to provide the driver with tactile feedback based on different pedal displacements. Summary of the Invention

[0004] The purpose of this invention is to propose a drive-by-wire pedal that solves the problem in related technologies where drive-by-wire pedals are difficult to provide the driver with force feedback based on different pedal displacements.

[0005] To this end, the first aspect of the present invention provides a drive-by-wire pedal, including a pedal, a housing, an elastic component, and a piston. The housing is used to accommodate the elastic component and the piston. The pedal is fixedly mounted on one end of the piston. The elastic component includes a first elastic element, a second elastic element, and a third elastic element. The first elastic element and the second elastic element are connected in series, and the second elastic element and the third elastic element are connected in parallel. A displacement sensor is provided between the pedal and the housing, and a force sensor is provided between the pedal and the piston.

[0006] Preferably, the elastic component further includes a spring seat, and the first elastic element and the second elastic element are connected in series through the spring seat.

[0007] Preferably, the first elastic element is disposed at one end of the spring seat, the second elastic element is sleeved on the spring seat, the two ends of the second elastic element are respectively connected to the spring seat and the piston, the spring seat is slidably connected to the piston, and the third elastic element is inside the piston.

[0008] Preferably, a wedge block and a friction ring are provided on the side wall of the piston, the friction ring is in contact with the inner wall of the housing, and the wedge block is used to fix the friction ring.

[0009] Preferably, the friction ring includes a friction surface and an inclined surface, the friction surface being in contact with the inner wall of the housing, and the inclined surface being in contact with the wedge block.

[0010] Preferably, the displacement sensor includes a sensor push rod and a sensor stator. The sensor push rod is fixedly mounted on the pedal and slidably connected to the housing. The sensor stator is fixedly mounted inside the housing.

[0011] Preferably, two displacement sensors are provided.

[0012] Preferably, a first force sensor is provided between the pedal and the piston.

[0013] Preferably, a second force sensor is provided between the housing and the elastic component.

[0014] Preferably, a dust cover is provided between the pedal and the housing to prevent foreign objects from entering.

[0015] Beneficial effects:

[0016] 1. The present invention provides a drive-by-wire pedal, which, through the cooperation of multiple elastic elements in the elastic assembly, provides different feedback forces according to different displacement stages of the pedal, thereby providing the driver with better feedback of pedal force and facilitating driver control.

[0017] 2. The present invention utilizes a combination of multiple sensors to provide timely and accurate feedback on the driver's intentions, with signal redundancy to ensure safety.

[0018] 3. In this invention, the friction ring and the wedge block work together to improve the stability of the pedal during displacement by utilizing the friction between the friction ring and the inner wall of the outer shell, thus providing the driver with better feedback on the pedal force.

[0019] 4. The drive-by-wire pedal in this invention has a compact structure, which can be easily installed in a vehicle; it has a simple structure and low cost; it is suitable for a variety of drive-by-wire applications, such as for brake pedals or accelerator pedals. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a drive-by-wire pedal according to the present invention.

[0022] Figure 2 This is a cross-sectional view of a drive-by-wire pedal according to the present invention.

[0023] Figure 3 This is a cross-sectional view of a drive-by-wire pedal according to the present invention.

[0024] Figure 4 This is an enlarged cross-sectional view of a drive-by-wire pedal according to the present invention.

[0025] In the diagram, 1-pedal, 2-housing, 3-elastic component, 31-first elastic element, 32-second elastic element, 33-third elastic element, 34-spring seat, 4-piston, 5-wedge block, 6-friction ring, 61-friction surface, 62-sloping surface, 7-first displacement sensor, 71-first sensor push rod, 72-first sensor stator, 8-second displacement sensor, 81-second sensor push rod, 82-second sensor stator, 9-first force sensor, 10-second force sensor. Detailed Implementation

[0026] The invention will be more readily understood by referring to the following detailed description of preferred embodiments and included examples. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of conflict, the definitions in this specification shall prevail.

[0027] Example 1:

[0028] like Figure 1-4 As shown, the first aspect of this embodiment provides a drive-by-wire pedal, including a pedal 1, a housing 2, an elastic component 3, and a piston 4. The housing 2 accommodates the elastic component 3 and the piston 4. The pedal 1 is fixedly mounted on one end of the piston 4. The elastic component 3 includes a first elastic element 31, a second elastic element 32, and a third elastic element 33. The first elastic element 31 and the second elastic element 32 are connected in series, and the second elastic element 32 and the third elastic element 33 are connected in parallel. A displacement sensor is provided between the pedal 1 and the housing 2, and a force sensor is provided between the pedal 1 and the piston 4. Through the cooperation of multiple elastic elements in the elastic component 3, different feedback forces are provided according to different displacement stages of the pedal 1, thereby providing the driver with better force feedback of the pedal 1 and facilitating driver control.

[0029] The elastic component 3 also includes a spring seat 34, through which the first elastic element 31 and the second elastic element 32 are connected in series. The first elastic element 31 is disposed at one end of the spring seat 34, the second elastic element 32 is sleeved on the spring seat 34, and both ends of the second elastic element 32 are respectively connected to the spring seat 34 and the piston 4. The spring seat 34 is slidably connected to the piston 4, and the third elastic element 33 is inside the piston 4. In one embodiment, the first elastic element 31 and the second elastic element 32 are helical compression springs, the third elastic element 33 is rubber, and the center lines of the first elastic element 31, the second elastic element 32, the third elastic element 33 and the spring seat 34 are collinear, providing feedback force to the pedal 1. By adjusting the stiffness parameters of the first elastic element 31, the second elastic element 32 and the third elastic element 33, different pedal 1 force requirements can be adapted.

[0030] A wedge block 5 and a friction ring 6 are provided on the side wall of the piston 4. The friction ring 6 contacts the inner wall of the housing 2, and the wedge block 5 is used to fix the friction ring 6. The friction ring 6 includes a friction surface 61 and an inclined surface 62. The friction surface 61 contacts the inner wall of the housing 2, and the inclined surface 62 contacts the wedge block 5. The wedge block 5 provides support force to the friction ring 6 through the inclined surface 62, causing the friction ring 6 to deform outward. The friction ring 6 contacts the inner wall of the housing 2 through the friction surface 61, generating pressure. When the piston 4 pushes the friction ring 6 forward, friction is generated between the friction surface 61 and the housing 2. As the feedback force increases, the generated friction increases. Because there is friction in the pedal 1 during forward and backward movement, the stability of the pedal 1 in a fixed position is improved, providing a better pedal feedback feel. The magnitude of the friction can be adjusted by adjusting the angle of the inclined surface 62.

[0031] Two displacement sensors are provided. In one embodiment, the two displacement sensors are a first displacement sensor 7 and a second displacement sensor 8, symmetrically arranged on the pedal 1. The first displacement sensor 7 includes a first sensor push rod 71 and a first sensor stator 72, and the second displacement sensor 8 includes a second sensor push rod 81 and a second sensor stator 82. The first sensor push rod 71 and the second sensor push rod 81 are fixedly mounted on the pedal 1 and slidably connected to the housing 2. The first sensor stator 72 and the second sensor stator 82 are fixedly mounted inside the housing 2. The first sensor push rod 71 and the second sensor push rod 81 move together with the pedal 1, cooperating with the first sensor stator 72 and the second sensor stator 82 to sense changes in signals and measure the displacement of the pedal 1. The first displacement sensor 7 and the second displacement sensor 8 are Hall effect sensors or inductive sensors.

[0032] A first force sensor 9 is disposed between the pedal 1 and the piston 4. A second force sensor 10 is disposed between the housing 2 and the elastic component 3. The first force sensor 9 is used to measure the magnitude of the force applied by the driver when pressing the pedal 1, and the second force sensor 10 is used to measure the magnitude of the feedback force from the elastic component 3.

[0033] A dust cover (not shown in the figure) is provided between the pedal 1 and the housing 2. The dust cover is used to prevent foreign objects from entering.

[0034] Working Principle: After the driver depresses pedal 1, pedal 1 undergoes three displacement stages. In the first stage, piston 4 rubs against the inner wall of the outer casing via friction ring 6, generating frictional force and simultaneously compressing the second elastic element 32. The second elastic element 32 transmits the force to the first elastic element 31 through spring seat 34. At this point, the first and second elastic elements 31 and 32 work together in series, and the compression stiffness is the stiffness of the first and second elastic elements 31 and 32 in series. In the second stage, piston 4 continues to advance, and the first and second elastic elements 31 and 32 are compressed until spring seat 34 contacts the end cap of the outer casing. At this point, the first elastic element 31 can no longer be compressed, and only the second elastic element 32 is active, with a compression stiffness equal to the stiffness of the second elastic element 32. In the third stage, piston 4 continues to advance, and the third elastic element 33 in piston 4 contacts spring seat 34. At this point, the second and third elastic elements 32 and 33 work together, and the compression stiffness is the stiffness of the second and third elastic elements 32 and 33 in parallel. When pedal 1 contacts housing 2, pedal 1 reaches the end of its displacement and can no longer advance. The first sensor push rod 71 and the second sensor push rod 81 move together with the pedal 1, cooperating with the first sensor stator 72 and the second sensor stator 82 to sense changes in signals and measure the displacement of the pedal 1. The first force sensor 9 is used to measure the magnitude of the force applied by the driver when pressing the pedal 1, and the second force sensor 10 is used to measure the magnitude of the feedback force from the elastic component 3.

[0035] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A drive-by-wire pedal, characterized in that, The device includes a pedal, a housing, an elastic assembly, and a piston. The housing houses the elastic assembly and the piston. The pedal is fixedly mounted on one end of the piston. The elastic assembly includes a first elastic element, a second elastic element, and a third elastic element. The first and second elastic elements are connected in series, and the second and third elastic elements are connected in parallel. A displacement sensor is provided between the pedal and the housing, and a force sensor is provided between the pedal and the piston. A wedge block and a friction ring are provided on the side wall of the piston. The friction ring contacts the inner wall of the housing, and the wedge block is used to fix the friction ring. The friction ring includes a friction surface and an inclined surface. The friction surface contacts the inner wall of the housing, and the inclined surface contacts the wedge block. The wedge block provides support force to the friction ring through the inclined surface, causing the friction ring to deform outward. The friction ring contacts the inner wall of the housing through the friction surface, generating pressure. When the piston pushes the friction ring forward, friction is generated between the friction surface and the housing. The elastic component further includes a spring seat, and the first elastic element and the second elastic element are connected in series through the spring seat; The first elastic element is disposed at one end of the spring seat, the second elastic element is sleeved on the spring seat, the two ends of the second elastic element are respectively connected to the spring seat and the piston, the spring seat is slidably connected to the piston, and the third elastic element is inside the piston.

2. A drive-by-wire pedal according to claim 1, characterized in that, The displacement sensor includes a sensor push rod and a sensor stator. The sensor push rod is fixedly mounted on the pedal and slidably connected to the housing. The sensor stator is fixedly mounted inside the housing.

3. A drive-by-wire pedal according to claim 1 or 2, characterized in that, Two displacement sensors are provided.

4. A drive-by-wire pedal according to claim 1, characterized in that, A first force sensor is provided between the pedal and the piston.

5. A drive-by-wire pedal according to claim 1, characterized in that, A second force sensor is provided between the housing and the elastic component.

6. A drive-by-wire pedal according to claim 1, characterized in that, A dust cover is provided between the pedal and the housing to prevent foreign objects from entering.

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