Brake pedal assembly, brake method and vehicle

Abstract

A brake pedal assembly, a brake method and a vehicle relate to the field of automobile technology, comprising a brake pedal, one end of the brake pedal is rotatably installed in a driver's cabin, and a rotation path comprises a first rotation path and a second rotation path; when the brake pedal rotates or rotates back on the first rotation path, a first opening device is connected with an energy recovery brake device, and the brake pedal assembly enters a first brake state; when the brake pedal rotates or rotates back on the second rotation path, the first opening device is connected with the energy recovery brake device, a second opening device opens a mechanical brake device, and the brake pedal assembly enters a second brake state. The brake pedal rotates on different rotation paths to complete the switching of the energy recovery brake state and the energy recovery brake and mechanical brake working state, the operation is completely same as that of a fuel vehicle, the reaction time of single-pedal emergency braking is eliminated from the root, and the problem of insufficient safety of single-pedal emergency braking is solved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a brake pedal assembly, a braking method and a vehicle. Background Art

[0002] The working logic of the existing single-pedal structure of new energy vehicles (hereinafter referred to as "single pedal") is to turn on the "energy recovery brake" "as long as the accelerator pedal is released", and its braking strength is a monotonically increasing function of the pedal return amount. When the accelerator pedal returns to the initial state before acceleration and reaches the "strongest energy recovery brake", if the deceleration is still insufficient when the "strongest energy recovery brake" is reached, the emergency brake pedal that controls the air brake or hydraulic brake (hereinafter collectively referred to as "mechanical brake") is pressed. Its strength is a monotonically increasing function of the brake pedal's displacement and pedal force, and the vehicle is decelerated together by the "strongest energy recovery brake" and the "mechanical brake". The main purpose of this working logic is to maximize the working opportunities of the "energy recovery brake" to maximize the driving range. It has three serious disadvantages:

[0003] 1. Single-pedal emergency braking is inadequately safe. When ICE vehicles are passing complex intersections, drivers can switch to braking in advance, adjust their speed, and place their foot on the brake pedal ready to brake, allowing them to pass through the intersection without disengaging the gear and idling. However, existing single-pedal systems activate regenerative braking as soon as the driver releases the accelerator pedal, preventing them from switching to the brake pedal in advance, exacerbating the driver's panic during emergency braking. The statistically significant time it takes for the driver's foot to switch from the accelerator to the brake pedal is approximately 0.3 seconds, and the maximum deceleration during maximum regenerative braking can reach 0.2g. At speeds between 30 km / h and 100 km / h, the braking lag distance for electric vehicles with a single pedal is 2.41 to 8.24 meters compared to ICE vehicles with a pre-engaged switch (switching time t = 0). Clearly, the single-pedal emergency braking safety of electric vehicles is significantly inferior to that of ICE vehicles.

[0004] 2. The existing single-pedal design does not conform to user habits or regulatory requirements. Human instinct is to apply force and increase it to initiate an action, and to reduce and release it to end it. However, the existing single-pedal design divides the "brake on and hold" function between two pedals, each with varying degrees of force, and the two pedals operate in opposite directions. Emergency braking is the same as with fuel vehicles: firmly press the brake pedal; non-emergency braking, however, involves reducing force and releasing the accelerator, which clearly violates human instinct. For non-emergency braking, which is the vast majority of the time, simply releasing the accelerator pedal is sufficient, leading to a gradual weakening of the awareness of the need to press the brake pedal. In the event of an emergency braking situation, drivers should immediately press the brake pedal. However, due to muscle memory, some drivers continue to release the accelerator pedal to perform regenerative braking, only pressing the brake pedal when they realize the deceleration is insufficient, resulting in premature braking. Furthermore, some drivers panic and mistakenly press the accelerator pedal, mistaking it for the brake pedal as the vehicle is slowing down, resulting in serious accidents. Hundreds of such accidents have occurred with a well-known electric vehicle brand, resulting in significant casualties and losses.

[0005] On May 27, 2024, the Ministry of Industry and Information Technology (MIIT) published a draft for public comment on the "Technical Requirements and Test Methods for Passenger Vehicle Braking Systems." Section 5.2.18 states that vehicles equipped with regenerative braking systems must meet the following additional requirements: "For vehicles equipped with regenerative braking systems, the braking effect achieved by releasing the accelerator pedal in a forward gear must not slow the vehicle to a stop." This mandates that the brake pedal must be pressed to stop a moving vehicle. Clearly, this document aims to counteract the serious harm caused by the single-pedal system, which weakens the perception of "pressing the brake pedal to brake."

[0006] 3. The existing single-pedal design lacks consistency or versatility with that of gasoline-powered vehicles. The accelerator and brake pedals on existing electric vehicles are not standardized with those on gasoline-powered vehicles. The industry generally recommends that drivers accustomed to gasoline-powered vehicles should not easily switch to electric vehicles. Clearly, these factors are extremely detrimental to the widespread adoption of electric vehicles. Summary of the Invention

[0007] The purpose of the present invention is to provide a brake pedal assembly, a braking method and a vehicle, which solve the technical problems of the existing single-pedal electric vehicles, such as insufficient emergency braking safety and the serious harm caused by the weakening of the awareness of "braking and stepping on the brake pedal".

[0008] The present invention provides the following solutions:

[0009] In a first aspect, the present invention provides a brake pedal assembly comprising:

[0010] a brake pedal, one end of which is rotatably mounted on the cab, and a rotation path of the brake pedal includes a first rotation path and a second rotation path;

[0011] a first opening device, the first opening device being disposed between the cab and a first side of the brake pedal and located on a rotational path of the brake pedal; when the brake pedal rotates or swivels on the first rotational path, the first opening device is connected to the energy recovery braking device, and the brake pedal assembly enters a first braking state;

[0012] A second opening device is arranged between the cab and the second side of the brake pedal, and is located on the rotation path of the brake pedal; when the brake pedal rotates or turns on the second rotation path, the first opening device is connected with the energy recovery braking device, the second opening device turns on the mechanical braking device, and the brake pedal assembly enters the second braking state.

[0013] Preferably, a spring is connected between the cab and the second side of the brake pedal, and when the brake pedal rotates or revolves on the first rotation path and the second rotation path, the spring is in a compressed state;

[0014] The first opening device is a spring-type switch, which is internally provided with a first telescopic part, a first return spring, a first terminal and a first contact bridge; the first end of the first return spring is fixed to the inner wall of the first opening device, and the second end is connected to the first end of the first telescopic part, the second end of the first telescopic part contacts or separates from the first side of the brake pedal, and extends or retracts relative to the first opening device; the first contact bridge is connected to the first end of the first telescopic part; the first end of the first terminal is connected to the energy recovery braking device, and the second end is located between the first contact bridge and the second end of the first telescopic part; when the spring is in a compressed state, the second end of the first telescopic part extends relative to the first opening device to make the first terminal contact with the first contact bridge, and the first opening device is connected to the energy recovery braking device.

[0015] Preferably, the second opening device is provided with a second telescopic part and a second return spring; the first end of the second return spring is connected to the mechanical brake device, and the second end is connected to the first end of the second telescopic part, and the second end of the second telescopic part contacts or separates from the second side of the brake pedal; when the brake pedal rotates or turns on the second rotation path, the second side of the brake pedal contacts the second telescopic part and puts the second return spring in a compressed state, and the second opening device opens the mechanical brake device.

[0016] Preferably, it further comprises a third opening device;

[0017] The third opening device is arranged between the cab and the first side of the brake pedal, and is located on the rotation path of the brake pedal; when the brake pedal rotates or turns on the first rotation path and the second rotation path, the third opening device is connected to the brake light.

[0018] Preferably, the third opening device is a spring-type switch, which is internally provided with a third telescopic portion, a third return spring, a second terminal and a second contact bridge;

[0019] The first end of the third return spring is fixed to the inner wall of the third opening device, and the second end is connected to the first end of the third telescopic portion. The second end of the third telescopic portion contacts or separates from the first side of the brake pedal and extends or retracts relative to the third opening device.

[0020] The second contact bridge is connected to the first end of the third telescopic portion; the first end of the second terminal is connected to the brake light, and the second end is located between the second contact bridge and the second end of the third telescopic portion;

[0021] When the spring is in a compressed state, the second end of the third telescopic portion extends relative to the third opening device to make the second terminal contact the second contact bridge, and the third opening device is connected to the brake light.

[0022] Preferably, the stiffness of the first return spring and the third return spring is smaller than the stiffness of the spring.

[0023] Preferably, the brake pedal is configured to be bent toward the first side of the brake pedal, and includes a first bent portion and a second bent portion;

[0024] The upper end of the first bent portion is rotatably mounted on the cab, and the second bent portion is connected to the lower end of the first bent portion; a first side surface of the second bent portion is provided with a bearing surface for bearing the driver's heel;

[0025] The first opening device and the third opening device are both arranged between the cab and the first side of the first bent portion;

[0026] The second opening device and the spring are both arranged between the cab and the second side of the second bent portion.

[0027] Preferably, the upper end of the first bending portion is rotatably mounted on the cab via a hinge.

[0028] In a second aspect, the present invention provides a braking method, which is performed using the above-mentioned brake pedal assembly and includes the following steps:

[0029] S1. The brake pedal is stepped on to rotate along a first path, the first opening device is connected to the energy recovery braking device, and the brake pedal assembly enters the first braking state; the first braking state is the energy recovery braking state;

[0030] S2. The force applied to the brake pedal is increased to rotate the brake pedal in a second path. The first activation device remains connected to the energy recovery braking device. Simultaneously, the second activation device activates the mechanical braking device, and the brake pedal assembly enters the second braking state. The second braking state is a state in which energy recovery braking and mechanical braking work together.

[0031] S3. Reducing the force of pressing the brake pedal so that the brake pedal rotates along the second path; the first opening device remains connected to the energy recovery braking device; and the second opening device remains on the mechanical braking device, so that the brake pedal assembly remains in the second braking state.

[0032] S4. Continue to reduce the force applied to the brake pedal so that the brake pedal rotates along the first path. The first opening device remains connected to the energy recovery braking device, and the second opening device turns off the mechanical braking device. The brake pedal assembly enters the first braking state.

[0033] S5. Completely release the brake pedal, and the brake pedal assembly is released from the braking state.

[0034] In a third aspect, the present invention describes a vehicle comprising the brake pedal assembly.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] 1. The brake pedal assembly provided by the present invention switches between regenerative braking and a combined regenerative braking and mechanical braking state by rotating the brake pedal 1 along different rotational paths. Its operation is identical to that of a fuel-powered vehicle, promoting the widespread use of electric vehicles. It also fundamentally eliminates the reaction time associated with single-pedal emergency braking, addressing the safety issues inherent in single-pedal emergency braking.

[0037] 2. By arranging the first opening device and the second opening device on both sides of the brake pedal, it is achieved that when the brake pedal rotates or turns on the first rotation path, only the energy recovery braking device is turned on; when the brake pedal rotates or turns on the second rotation path, the energy recovery device and the mechanical braking device are turned on at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 Schematic diagram of the initial state of the brake pedal assembly according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of a first braking state of a brake pedal assembly according to an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of a second braking state of the brake pedal assembly according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic structural diagram of the first opening device and the third opening device according to an embodiment of the present invention.

[0043] Among them: 1-brake pedal;

[0044] 2-first opening device; 21-first telescopic portion; 22-first return spring; 23-first terminal; 24-first terminal bridge;

[0045] 3-second opening device; 31-second telescopic portion; 32-second return spring;

[0046] 4-spring;

[0047] 5 - third opening device; 51 - third telescopic portion; 52 - third return spring; 53 - second terminal; 54 - second wiring bridge;

[0048] 6-Hinge. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of this application more clear, this application will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0050] The terms used in the examples of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a," "the," and "the" used in the examples of this application and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0051] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0052] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0053] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0054] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0055] It should be noted in particular that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0056] Example 1

[0057] See also Figures 1-4As shown, a brake pedal assembly provided by an embodiment of the present application includes a brake pedal 1, one end of the brake pedal 1 is rotatably mounted on the cab, and the rotation path of the brake pedal 1 includes a first rotation path and a second rotation path; a first opening device 2, the first opening device 2 is arranged between the cab and the first side of the brake pedal 1, and is located on the rotation path of the brake pedal 1; when the brake pedal 1 rotates or turns on the first rotation path, the first opening device 2 is connected to the energy recovery braking device, and the brake pedal assembly enters the first braking state; a second opening device 3, the second opening device 3 is arranged between the cab and the second side of the brake pedal 1, and is located on the rotation path of the brake pedal 1; when the brake pedal 1 rotates or turns on the second rotation path, the first opening device 2 is connected to the energy recovery braking device, the second opening device 3 turns on the mechanical braking device, and the brake pedal assembly enters the second braking state.

[0058] In this embodiment, the first activation device 2 is used to activate the energy recovery braking device, and the second activation device 3 is used to activate the mechanical braking device. By arranging the first and second activation devices on either side of the brake pedal, when the brake pedal 1 rotates or swivels along a first rotational path, only the first activation device 2 activates the energy recovery braking device, while the second activation device 3 does not activate the mechanical braking device. The brake pedal assembly is in a first braking state, i.e., the energy recovery braking state. When the brake pedal 1 rotates or swivels along a second rotational path, the first activation device 2 activates the energy recovery braking device, while the second activation device 3 activates the mechanical braking device. The brake pedal assembly is in a second braking state, i.e., a state in which energy recovery braking and mechanical braking work together. The switching of braking states is accomplished by rotating the brake pedal 1 along different rotational paths.

[0059] On the first hand, the present invention fundamentally solves the problem of insufficient safety of existing single-pedal emergency brakes. When the driver wants to brake, he steps on the brake pedal 1, causing the brake pedal 1 to rotate on the first rotation path. The brake pedal assembly activates the energy recovery braking function, and its braking strength is a monotonically increasing function of the pedal depression displacement and the pedal force. If the deceleration is still insufficient even after the pedal force is increased to the strongest energy recovery braking, the pedal force is further increased to cause the brake pedal 1 to rotate on the second rotation path. The brake pedal assembly simultaneously activates the mechanical braking function, and the vehicle is decelerated by the strongest energy recovery braking and mechanical braking. In case of emergency braking, the brake pedal 1 can be directly stepped on to the bottom. Its operation is exactly the same as that of a fuel vehicle, which is conducive to promoting the promotion of electric vehicles. At the same time, the reaction time during single-pedal emergency braking is eliminated from the root, solving the problem of insufficient safety of single-pedal emergency braking.

[0060] Second aspect: The present invention increases the cruising range of electric vehicles. When the driver drives an electric vehicle implementing the present invention and releases the accelerator pedal at a vehicle speed V1, under the combined effects of wind resistance, slope resistance, and tire rolling resistance, after traveling a distance L1, the vehicle speed drops to V2. When the driver drives an existing single-pedal electric vehicle and releases the accelerator pedal at a vehicle speed V1, under the combined effects of wind resistance, slope resistance, tire rolling resistance, and energy recovery braking resistance, after traveling a distance L2, the vehicle speed drops to V2. The energy recovered during this process can travel a distance L3 at a vehicle speed of 0.5*(V1+V2) on the same section of road. If the conversion rate of the vehicle's kinetic energy into battery electrical energy is 100%, according to the law of conservation of energy, then L2+L3 = L1. However, the conversion rate is actually less than 100%, so the actual situation must be: L2+L3 < L1, that is, L1 > L2+L3. This qualitative analysis shows that when the driver does not want to accelerate but also does not want to step on the brake (such as switching in advance, or the driver feels that the vehicle speed is a bit too fast, but the road conditions do not require emergency deceleration, so the accelerator pedal is released and the vehicle decelerates due to wind resistance, slope resistance, and tire rolling resistance), compared with an electric vehicle equipped with the existing single-pedal structure, the electric vehicle equipped with the present invention will increase its cruising range.

[0061] Third aspect: The present invention eradicates the operation that violates human instincts and the resulting hazards of the existing single-pedal structure of electric vehicles. Each time the present invention brakes (regardless of the intensity), it strengthens the awareness and muscle memory of "using the brake pedal to brake", and the result is far better than the expected outcome of the relevant items in the draft of the "Technical Requirements and Test Methods for Passenger Car Braking Systems" newly promulgated.

[0062] Further, a spring 4 is connected between the cab and the second side of the brake pedal 1. When the brake pedal 1 rotates or rotates back on the first rotation path and the second rotation path, the spring 4 is in a compressed state;

[0063] The first opening device 2 is a spring-type switch, which internally has a first telescopic part 21, a first return spring 22, a first terminal 23, and a first contact bridge 24; the first end of the first return spring 22 is fixed to the inner wall of the first opening device 2, the second end is connected to the first end of the first telescopic part 21, the second end of the first telescopic part 21 contacts or separates from the first side of the brake pedal 1 and extends or retracts relative to the first opening device 2; the first contact bridge 24 is connected to the first end of the first telescopic part 21; the first end of the first terminal 23 is connected to the energy recovery braking device, and the second end is located between the first contact bridge 24 and the second end of the first telescopic part 21; when the spring 4 is in a compressed state, the second end of the first telescopic part 21 extends relative to the first opening device 2 to make the first terminal 23 and the first contact bridge 24 contact, and the first opening device 2 is connected to the energy recovery braking device.

[0064] The second opening device 3 is provided with a second telescopic part 31 and a second return spring 32; the first end of the second return spring 32 is connected to the mechanical braking device, and the second end is connected to the first end of the second telescopic part 31, and the second end of the second telescopic part 31 contacts or separates from the second side of the brake pedal 1; when the brake pedal 1 rotates or turns on the second rotation path, the second side of the brake pedal 1 contacts the second telescopic part 31 and puts the second return spring 32 in a compressed state, and the second opening device 3 opens the mechanical braking device.

[0065] See also Figure 1 and Figure 4 The rightward force of spring 4 compresses first telescopic portion 21 of brake pedal 1 until it retracts relative to first opening device 2. This separates first terminal 23 from first contact bridge 24, disconnecting the regenerative braking circuit and disabling the regenerative braking system. Simultaneously, first telescopic portion 21 compresses first return spring 22. Second telescopic portion 31 is not in contact with the second side of brake pedal 1, and the mechanical brake system is not activated.

[0066] See also Figure 2 and Figure 4 The driver's leftward pedal force on the brake pedal 1 overcomes the resistance of spring 4 and rotates along the first rotational path. Spring 4 is compressed, and the first telescopic portion 21, under the action of the first return spring 22, extends relative to the first activation device 2. The first terminal 23 contacts the first contact bridge 24, completing the circuit of the first activation device 2 and activating the regenerative braking system. During this process, the second telescopic portion 31 does not contact the second side of the brake pedal 1, the mechanical brake system is not activated, and the vehicle is in the regenerative braking state. When the first telescopic portion 21 is about to lose contact with the first side of the brake pedal 1, the extension of the first telescopic portion 21 reaches its maximum value, and the vehicle is in the strongest regenerative braking state. At this point, the second side of the brake pedal 1 is in contact with the second telescopic portion 31, but the mechanical brake system is still not activated.

[0067] See also Figure 3 and Figure 4 The driver's foot continues to increase the force applied to brake pedal 1, causing it to rotate along its second rotational path, further compressing spring 4. Brake pedal 1 disengages from first telescopic portion 21, which remains fully extended, and regenerative braking remains at its strongest state. Brake pedal 1 compresses second telescopic portion 31, overcoming the resistance of second return spring 32 and retracting it to the left, thereby activating the mechanical brake system. The vehicle enters a state of combined maximum regenerative and mechanical braking. When the compressive force applied to spring 4 reaches its maximum value, the mechanical brake system reaches its strongest state, and the vehicle is now in a state of combined maximum regenerative and mechanical braking.

[0068] When the brake is released, the force applied to the brake pedal 1 decreases, and the brake pedal 1 rotates on the second rotation path under the action of the return elastic force of the spring 4. The second telescopic portion 31 extends to the right under the action of the second return spring 32, and the mechanical braking force decreases until it returns to the Figure 2 At this time, the mechanical brake is completely released, the first telescopic portion 21 is still kept in the maximum extension state, and the vehicle is in the strongest energy recovery braking state.

[0069] The force applied to the brake pedal 1 continues to decrease, and the brake pedal 1 rotates on the first rotation path, pressing the first telescopic portion 21 to overcome the resistance of the first return spring 22 and retract to the right, and the energy recovery braking force decreases accordingly until it returns to the first position. Figure 1 The energy recovery brake is completely released, and the vehicle returns to the state where both the mechanical brake and the energy recovery brake are released.

[0070] Furthermore, the brake pedal assembly also includes a third opening device 5; the third opening device 5 is arranged between the cab and the first side of the brake pedal 1, and is located on the rotation path of the brake pedal 1; when the brake pedal 1 rotates or rotates on the first rotation path and the second rotation path, the third opening device 5 is connected to the brake light.

[0071] The third opening device 5 is a spring-type switch, which is internally provided with a third telescopic part 51, a third return spring 52, a second terminal 53 and a second contact bridge 54; the first end of the third return spring 52 is fixed to the inner wall of the third opening device 5, and the second end is connected to the first end of the third telescopic part 51, the second end of the third telescopic part 51 contacts or separates from the first side of the brake pedal 1, and extends or retracts relative to the third opening device 5; the second contact bridge 54 is connected to the first end of the third telescopic part 51; the first end of the second terminal 53 is connected to the brake light, and the second end is located between the second contact bridge 54 and the second end of the third telescopic part 51; when the spring 4 is in a compressed state, the second end of the third telescopic part 51 extends relative to the third opening device 5 to make the second terminal 53 contact the second contact bridge 54, and the third opening device 5 is connected to the brake light.

[0072] The third activation device 5 is used to activate and deactivate the brake lights, synchronized with the first activation device 2. When the vehicle is in the first or second braking state, the third activation device 5 connects the brake light circuit, illuminating the brake lights to warn vehicles and people behind. When the vehicle returns to a state where both mechanical and regenerative braking are released, the third activation device disconnects the brake light circuit, turning the brake lights off. The operating principle is similar to that of the first activation device and will not be further described here.

[0073] Furthermore, the stiffness of the first return spring 22 and the third return spring 52 are both smaller than the stiffness of the spring 4 .

[0074] The stiffness of the first return spring 22 is less than that of the spring 4. When the brake pedal assembly is in the non-braking state, the first return spring 22 overcomes its resistance and compresses the first telescopic portion 21 to a position retracted relative to the first opening device 2, thereby separating the first terminal 23 from the first contact bridge 24 and disengaging the energy recovery braking device. The same applies to the third return spring 52.

[0075] Furthermore, the brake pedal 1 is configured to be bent toward a first side of the brake pedal 1 and includes a first bent portion 11 and a second bent portion 12. The upper end of the first bent portion 11 is pivotally mounted to the cab, and the second bent portion 12 is connected to the lower end of the first bent portion 11. The first side surface of the second bent portion 12 is provided with a bearing surface for supporting the driver's heel. The first opening device 2 and the third opening device 5 are both disposed between the cab and the first side of the first bent portion 11. The second opening device 3 and the spring 4 are both disposed between the cab and the second side of the second bent portion 12. This configuration has the advantage of increasing the compression stroke of the spring 4 within the limited cab space, thereby arranging the first opening device 2, the second opening device 3, and the third opening device 5 to meet the rotation path requirements of the brake pedal 1.

[0076] Furthermore, the upper end of the first bent portion 11 is rotatably mounted on the cab via a hinge 6 .

[0077] Example 2

[0078] This embodiment provides a braking method, which is implemented using the above-mentioned brake pedal assembly and includes the following steps:

[0079] S1. Depressing the brake pedal 1 causes the brake pedal 1 to rotate along a first rotation path, the first opening device 2 is connected to the energy recovery braking device, and the brake pedal assembly enters a first braking state; the first braking state is an energy recovery braking state;

[0080] See also Figure 2 and Figure 4 The driver's leftward pedal force on the brake pedal 1 overcomes the resistance of spring 4 and rotates along the first rotational path. Spring 4 is compressed, and the first telescopic portion 21, under the action of the first return spring 22, extends relative to the first activation device 2. The first terminal 23 contacts the first contact bridge 24, completing the circuit of the first activation device 2 and activating the regenerative braking system. During this process, the second telescopic portion 31 does not contact the second side of the brake pedal 1, the mechanical brake system is not activated, and the vehicle is in the regenerative braking state. When the first telescopic portion 21 is about to lose contact with the first side of the brake pedal 1, the extension of the first telescopic portion 21 reaches its maximum value, and the vehicle is in the strongest regenerative braking state. At this point, the second side of the brake pedal 1 is in contact with the second telescopic portion 31, but the mechanical brake system is still not activated.

[0081] S2. The force applied to the brake pedal 1 is increased to rotate the brake pedal 1 along the second rotation path. The first opening device 2 remains connected to the energy recovery braking device. Simultaneously, the second opening device 3 activates the mechanical braking device, and the brake pedal assembly enters the second braking state. The second braking state is a state in which energy recovery braking and mechanical braking work together.

[0082] See also Figure 3 and Figure 4 The driver's foot continues to increase the force applied to brake pedal 1, causing it to rotate along its second rotational path, further compressing spring 4. Brake pedal 1 disengages from first telescopic portion 21, which remains fully extended, and regenerative braking remains at its strongest state. Brake pedal 1 compresses second telescopic portion 31, overcoming the resistance of second return spring 32 and retracting it to the left, thereby activating the mechanical brake system. The vehicle enters a state of combined maximum regenerative and mechanical braking. When the compressive force applied to spring 4 reaches its maximum value, the mechanical brake system reaches its strongest state, and the vehicle is now in a state of combined maximum regenerative and mechanical braking.

[0083] S3. The force applied to the brake pedal 1 is reduced so that the brake pedal 1 rotates along the second rotation path. The first opening device 2 remains connected to the energy recovery braking device. Meanwhile, the second opening device 3 remains on the mechanical braking device, and the brake pedal assembly remains in the second braking state.

[0084] When the brake is released, the force applied to the brake pedal 1 decreases, and the brake pedal 1 rotates on the second rotation path under the action of the return force of the spring 4. The second telescopic part 31 extends to the right under the action of the second return spring 32, and the mechanical braking force decreases accordingly. The vehicle is in the strongest energy recovery braking and mechanical braking joint braking state.

[0085] S4. The force applied to the brake pedal 1 is further reduced so that the brake pedal 1 rotates along the first rotation path. The first opening device 2 remains connected to the energy recovery braking device, and the second opening device 3 turns off the mechanical braking device. The brake pedal assembly enters the first braking state.

[0086] As the force applied to the brake pedal 1 continues to decrease, the brake pedal 1 rotates back along the first rotational path, disengaging from the second telescopic portion 31 and disengaging the mechanical brake. Simultaneously, the first telescopic portion 21 is compressed, overcoming the resistance of the first return spring 22 and retracting to the right. The regenerative braking force decreases, and the vehicle enters the regenerative braking state.

[0087] S5. Completely release the brake pedal 1, and the brake pedal assembly is released from the braking state. Figure 1 The energy recovery brake is completely released, and the vehicle returns to the state where both the mechanical brake and the energy recovery brake are released.

[0088] First, this braking method operates identically to fuel-powered vehicles, promoting the widespread adoption of electric vehicles. It also fundamentally eliminates the reaction time associated with single-pedal emergency braking, resolving the safety issues inherent in single-pedal emergency braking. Second, it improves the range of electric vehicles. Third, it eliminates the unnatural operation and associated hazards of existing single-pedal electric vehicle structures.

[0089] Example 3

[0090] This embodiment provides a vehicle including the above-mentioned brake pedal assembly.

[0091] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. References to the common and similar parts between the various embodiments will be sufficient. For the systems or devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, their descriptions are relatively simple; for relevant details, refer to the descriptions of the methods.

[0092] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A brake pedal assembly, characterized in that: include: A brake pedal (1), one end of the brake pedal (1) being rotatably mounted on the cab, and a rotation path of the brake pedal (1) comprising a first rotation path and a second rotation path; A first opening device (2), the first opening device (2) being arranged between the cab and a first side of the brake pedal (1) and being located on a rotation path of the brake pedal (1); when the brake pedal (1) rotates or swivels on the first rotation path, the first opening device (2) is connected to the energy recovery braking device, and the brake pedal assembly enters a first braking state; A second opening device (3), the second opening device (3) is arranged between the cab and the second side of the brake pedal (1), and is located on the rotation path of the brake pedal (1); when the brake pedal (1) rotates or revolves on the second rotation path, the first opening device (2) is connected to the energy recovery braking device, the second opening device (3) activates the mechanical braking device, and the brake pedal assembly enters a second braking state; The brake pedal assembly further comprises a third opening device (5); the third opening device (5) is arranged between the driver's cab and the first side of the brake pedal (1), and is located on the rotation path of the brake pedal (1); when the brake pedal (1) rotates or revolves on the first rotation path and the second rotation path, the third opening device (5) is connected to the brake light.

2. The brake pedal assembly according to claim 1, wherein: A spring (4) is connected between the cab and the second side of the brake pedal (1), and when the brake pedal (1) rotates or revolves on the first rotation path and the second rotation path, the spring (4) is in a compressed state; The first opening device (2) is a spring-type switch, and a first telescopic portion (21), a first return spring (22), a first terminal (23) and a first contact bridge (24) are arranged inside the first opening device (2); the first end of the first return spring (22) is fixed to the inner wall of the first opening device (2), and the second end is connected to the first end of the first telescopic portion (21); the second end of the first telescopic portion (21) contacts or separates from the first side of the brake pedal (1), and extends or retracts relative to the first opening device (2); the first contact bridge (24) is connected to the first end of the first telescopic portion (21); the first end of the first terminal (23) is connected to the energy recovery braking device, and the second end is located between the first contact bridge (24) and the second end of the first telescopic portion (21); when the spring (4) is in a compressed state, the second end of the first telescopic portion (21) extends relative to the first opening device (2) so that the first terminal (23) and the first contact bridge (24) contact each other.

3. The brake pedal assembly according to claim 2, wherein: The second opening device (3) is provided with a second telescopic portion (31) and a second return spring (32); the first end of the second return spring (32) is connected to the mechanical brake device, and the second end is connected to the first end of the second telescopic portion (31), and the second end of the second telescopic portion (31) contacts or separates from the second side of the brake pedal (1); when the brake pedal (1) rotates or revolves on the second rotation path, the second side of the brake pedal (1) contacts the second telescopic portion (31) and puts the second return spring (32) into a compressed state.

4. The brake pedal assembly according to claim 3, wherein: The third opening device (5) is a spring-type switch, which is internally provided with a third telescopic portion (51), a third return spring (52), a second terminal (53) and a second contact bridge (54); The first end of the third return spring (52) is fixed to the inner wall of the third opening device (5), and the second end is connected to the first end of the third telescopic portion (51); the second end of the third telescopic portion (51) contacts or separates from the first side of the brake pedal (1), and extends or retracts relative to the third opening device (5); The second contact bridge (54) is connected to the first end of the third telescopic portion (51); the first end of the second terminal (53) is connected to the brake light, and the second end is located between the second contact bridge (54) and the second end of the third telescopic portion (51); When the spring (4) is in a compressed state, the second end of the third telescopic portion (51) extends relative to the third opening device (5) so that the second terminal (53) and the second contact bridge (54) come into contact, and the third opening device (5) is connected to the brake light.

5. The brake pedal assembly according to claim 4, wherein: The stiffness of the first return spring (22) and the third return spring (52) are both smaller than the stiffness of the spring (4).

6. The brake pedal assembly according to claim 3, wherein: The brake pedal (1) is configured to be bent in a direction toward a first side of the brake pedal (1), and comprises a first bent portion (11) and a second bent portion (12); The upper end of the first bending portion (11) is rotatably mounted on the cab, and the second bending portion (12) is connected to the lower end of the first bending portion (11); a first side surface of the second bending portion (12) is provided with a bearing surface for bearing the driver's heel; The first opening device (2) and the third opening device (5) are both arranged between the cab and the first side of the first bent portion (11); The second opening device (3) and the spring (4) are both arranged between the cab and the second side of the second bent portion (12).

7. The brake pedal assembly according to claim 6, wherein: The upper end of the first bent portion (11) is rotatably mounted on the cab via a hinge (6).

8. A braking method, characterized in that: The method is completed by using the brake pedal assembly according to any one of claims 1 to 7, comprising the following steps: S1. The brake pedal (1) is stepped on to rotate the brake pedal (1) on a first path, the first opening device (2) is connected to the energy recovery braking device, and the brake pedal assembly enters the first braking state; the first braking state is an energy recovery braking state; S2, increasing the force of stepping on the brake pedal (1) so that the brake pedal (1) rotates on the second path, the first opening device (2) remains connected to the energy recovery braking device, and at the same time, the second opening device (3) turns on the mechanical braking device, and the brake pedal assembly enters the second braking state; the second braking state is a state in which energy recovery braking and mechanical braking work together; S3, reducing the force of stepping on the brake pedal (1) so that the brake pedal (1) rotates on the second path, the first opening device (2) remains connected to the energy recovery braking device, and at the same time, the second opening device (3) remains on the mechanical braking device, and the brake pedal assembly remains in the second braking state; S4, continuing to reduce the force of stepping on the brake pedal (1) so that the brake pedal (1) rotates on the first path, the first opening device (2) remains connected to the energy recovery braking device, the second opening device (3) turns off the mechanical braking device, and the brake pedal assembly enters the first braking state; S5. Completely release the brake pedal (1), and the brake pedal assembly releases the braking state.

9. A vehicle, characterized in that: A brake pedal assembly comprising any one of claims 1 to 7.

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