An electronic pedal for an electromechanical brake system and a vehicle

Abstract

The utility model provides a kind of electronic pedal and vehicle for electronic mechanical braking system, a kind of electronic pedal for electronic mechanical braking system, comprising: pressure sensor, sensor pad, shell, spring assembly, for preventing the positioning mechanism of spring assembly autorotation, support frame, displacement sensor, magnet, push rod and pedal connecting rod, the pressure sensor and the sensor pad are all installed in one end of the shell, one end of the spring assembly is abutted with the sensor pad, the other end of the spring assembly is abutted with the support frame by the positioning mechanism, the support frame is slidably installed in the shell, the displacement sensor is installed on the shell, the magnet is installed on the support frame, the push rod is connected with the support frame and the pedal connecting rod respectively.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking equipment technology, and in particular to an electronic pedal for an electromechanical braking system and a vehicle. Background Technology

[0002] Most electronic pedals on the market currently use dual displacement sensors to ensure system safety, or spring and magnet components to ensure the transmission of reciprocating motion displacement signals.

[0003] Using dual displacement sensors to ensure functional safety results in the absence of pedal pressure feedback, making it impossible to accurately determine the driver's intention to apply the brakes. Consequently, the electromechanical braking system cannot provide comfortable and accurate braking feedback.

[0004] A magnet is used to transmit the displacement signal, and the compression of a spring provides feedback on the pedal's displacement signal. Due to the nature of the spring material, vibrations during pedaling and vehicle movement cause the spring to rotate, which can affect the magnetic field signal of the magnet, thereby affecting the transmission of the pedal displacement signal. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing an electronic pedal for an electromechanical braking system and a vehicle.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An electronic pedal for an electromechanical braking system includes: a pressure sensor, a sensor pad, a housing, a spring assembly, a positioning mechanism for preventing the spring assembly from rotating, a support frame, a displacement sensor, a magnet, a push rod, and a pedal connecting rod. The pressure sensor and the sensor pad are both installed at one end of the housing. One end of the spring assembly abuts against the sensor pad, and the other end of the spring assembly abuts against the support frame through the positioning mechanism. The support frame is slidably installed in the housing. The displacement sensor is installed on the housing. The magnet is installed on the support frame. The push rod is connected to the support frame and the pedal connecting rod respectively.

[0007] The beneficial effects of this utility model's technical solution are as follows: The pedal input displacement is connected to the front end of the pedal connecting rod. This input displacement drives the support frame via a push rod, causing the magnet installed in the support frame to reciprocate. The displacement signal is captured by a displacement sensor. At the pressure sensor end, the support frame, driven by the push rod, compresses a spring assembly that presses against a sensor pad. The sensor pad then presses against the pressure sensor, thus capturing the pedal pressure signal applied by the entire structure. When the passenger car driver depresses the brake pedal, the internal spring assembly is positioned to ensure that the electronic pedal transmits a precise displacement signal to the displacement sensor during its reciprocating motion. Furthermore, a pressure sensor mechanism is added to the electronic pedal to ensure continuous monitoring and feedback of the pressure signal during the pedal's reciprocating motion, facilitating precise displacement and pressure feedback. The positioning mechanism achieves anti-rotation positioning and precise transmission of displacement signals. The installation of the positioning mechanism prevents rotation during compression, ensuring that the spring assembly does not rotate, thus preventing it from affecting the magnet's magnetic field and consequently the transmission and reception of the displacement sensor's displacement signal, achieving precise displacement feedback. The system employs a combination of a pressure sensor and a displacement sensor to ensure functional safety. This allows the electronic pedal to receive both displacement and pressure signals during operation, facilitating accurate judgment of the driver's intention to apply the brakes and enabling the electromechanical braking system to make comfortable and accurate braking force output decisions.

[0008] Furthermore, the positioning mechanism is a positioning pin, the support frame is provided with a positioning hole, the other end of the spring assembly is provided with a positioning groove, one end of the positioning pin is installed in the positioning hole, and the other end of the positioning pin is installed in the positioning groove.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are as follows: To achieve precise displacement and pressure feedback, a positioning hole is set at the end of the support frame, and a positioning pin is added to cooperate with the large spring to achieve anti-rotation positioning and precise transmission of displacement signals. Placing the positioning pin in the positioning hole of the support frame and installing the large spring with a positioning groove to cooperate with the positioning pin serves to prevent rotation and ensure that the large spring will not rotate during compression, thus affecting the magnetic field of the magnet and consequently affecting the transmission and reception of the displacement sensor's displacement signal, achieving the purpose of precise displacement feedback.

[0010] Furthermore, the spring assembly includes: a small spring, a large spring seat, and a large spring. The two ends of the small spring abut against the sensor pad and the large spring seat, respectively. One end of the large spring seat abuts against the large spring seat, and the other end of the large spring seat abuts against the support frame via the positioning mechanism. The large spring seat is sleeved on the push rod. The large spring seat has a "U"-shaped structure, and the diameter of the large spring is larger than the diameter of the small spring.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The pedal input displacement is connected to the front end of the pedal connecting rod. This input displacement drives the support frame via a push rod. Magnets embedded in the support frame reciprocate, and the displacement signal is captured by a displacement sensor. At the pressure sensor end, the support frame, driven by the push rod, compresses a small spring and a large spring, pressing them onto a sensor pad. The sensor pad then presses against the pressure sensor, thereby capturing the pedal pressure signal applied by the entire structure. In the initial position after the entire mechanism is installed, the small spring, through tolerance control, ensures that the pressure sensor is already pressed down by the sensor pad at the same time the entire mechanism is installed, placing it in a pre-compressed state. There is no gap between the pressure sensor and the sensor pad, guaranteeing that the pedal pressure signal is quickly and accurately transmitted the instant the pedal is pressed down.

[0012] Furthermore, one end of the housing is connected to a bottom cover by a bottom cover bolt, and the bottom cover is provided with a pressure sensor placement slot. The pressure sensor is installed in the pressure sensor placement slot and is provided with a pressure sensor force-receiving end. One end of the sensor pad is provided with a contact surface, and the pressure sensor force-receiving end abuts against the contact surface.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are: a pressure sensor is placed in the bottom cover, and a sensor pad is used to press on the pressure sensor to achieve the purpose of transmitting pressure signals. Pressure is transmitted to the pressure sensor through the contact surface, and the accurate transmission of pressure signals is achieved through the design of the installation method and the pressure transmission method.

[0014] Furthermore, the other end of the sensor pad is provided with transition rubber and shock-absorbing rubber. The transition rubber is located on the movement trajectory of the push rod, and the shock-absorbing rubber is located on the movement trajectory of the spring assembly.

[0015] The beneficial effects of adopting the above-mentioned further technical solutions are: the transition rubber and the shock-absorbing rubber are used to buffer the push rod, the large spring seat of the elastic component and the sensor pad, to prevent damage and improve stability and reliability.

[0016] Furthermore, a firewall is installed at the other end of the housing, one end of the push rod is fixedly connected to the support frame, one end of the push rod is connected to a ball-head push rod, the ball-head push rod is connected to the pedal connecting rod, a push rod spring is sleeved on the outside of the ball-head push rod, and the two ends of the push rod spring abut against the firewall and the pedal connecting rod respectively.

[0017] The beneficial effects of adopting the above-mentioned further technical solution are: the firewall is used to limit the support frame; the ball-end push rod is used to connect the push rod to the pedal connecting rod; and the push rod spring is used to reset the ball-end push rod.

[0018] Furthermore, the firewall is connected to the housing via housing bolts, and firewall mounting bolts are installed on the firewall. The ball-head push rod is connected to the pedal connecting rod via an adapter. The two ends of the push rod spring abut against the firewall and the adapter, respectively. A dust cover is fitted on the outer side of the push rod spring.

[0019] The beneficial effects of adopting the above-mentioned further technical solutions are: the bolts facilitate the installation and maintenance of components; the adapter allows for detachable connection between the ball joint push rod and the pedal connecting rod, improving applicability; and the dust cover prevents external dust from contaminating the push rod spring and the ball joint push rod.

[0020] Furthermore, a damping ring is installed on the side wall of the support frame, and the damping ring abuts against the inner wall of the housing.

[0021] The beneficial effects of adopting the above-mentioned further technical solutions are: the setting of the damping ring increases the damping of the support frame, thereby improving the stability and reliability of the system.

[0022] Furthermore, the displacement sensor is mounted on the side wall of the housing by displacement sensor bolts; the magnet is embedded in the side wall of the support frame, and the position of the magnet is adjacent to the displacement sensor.

[0023] The beneficial effects of adopting the above-mentioned further technical solution are: setting a positioning mechanism on the support frame will limit and stop the rotation of the exploration component that affects the magnetic field of the magnet, so that the magnetic signal can be transmitted accurately during the pedaling process, thereby enabling the pedal displacement signal to be accurately transmitted to the displacement sensor.

[0024] In addition, this utility model also provides a vehicle including the above-mentioned electronic pedal for an electromechanical braking system, and further including a pedal connected to a pedal connecting rod.

[0025] The beneficial effects of this utility model's technical solution are as follows: The pedal input displacement is connected to the front end of the pedal connecting rod. This input displacement drives the support frame via a push rod, causing the magnet installed in the support frame to reciprocate. The displacement signal is captured by a displacement sensor. At the pressure sensor end, the support frame, driven by the push rod, compresses a spring assembly that presses against a sensor pad. The sensor pad then presses against the pressure sensor, thus capturing the pedal pressure signal applied by the entire structure. When the passenger car driver depresses the brake pedal, the internal spring assembly is positioned to ensure that the electronic pedal transmits a precise displacement signal to the displacement sensor during its reciprocating motion. Furthermore, a pressure sensor mechanism is added to the electronic pedal to ensure continuous monitoring and feedback of the pressure signal during the pedal's reciprocating motion, facilitating precise displacement and pressure feedback. The positioning mechanism achieves anti-rotation positioning and precise transmission of displacement signals. The installation of the positioning mechanism prevents rotation during compression, ensuring that the spring assembly does not rotate, thus preventing it from affecting the magnet's magnetic field and consequently the transmission and reception of the displacement sensor's displacement signal, achieving precise displacement feedback. The system employs a combination of a pressure sensor and a displacement sensor to ensure functional safety. This allows the electronic pedal to receive both displacement and pressure signals during operation, facilitating accurate judgment of the driver's intention to apply the brakes and enabling the electromechanical braking system to make comfortable and accurate braking force output decisions.

[0026] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is one of the structural schematic diagrams of an electronic pedal for an electromechanical braking system provided in an embodiment of this utility model.

[0029] Figure 2 This is a second schematic diagram of the structure of an electronic pedal for an electromechanical braking system provided in an embodiment of this utility model.

[0030] Figure 3 The third schematic diagram of the structure of the electronic pedal for the electromechanical braking system provided in this embodiment of the present invention.

[0031] Figure 4The fourth schematic diagram of the structure of the electronic pedal for the electromechanical braking system provided in this embodiment of the present invention.

[0032] Figure 5 The fifth schematic diagram of the structure of the electronic pedal for the electromechanical braking system provided in this embodiment of the present invention.

[0033] Figure 6 This is the sixth schematic diagram of the structure of the electronic pedal for the electromechanical braking system provided in this embodiment of the present invention.

[0034] Figure 7 The seventh schematic diagram of the structure of the electronic pedal for the electromechanical braking system provided in this embodiment of the present invention.

[0035] Reference numerals: 10, Pressure sensor; 11, Pressure sensor force-bearing end; 20, Bottom cover bolt; 30, Bottom cover; 31, Pressure sensor placement slot; 40, Sensor pad; 41, Contact surface; 50, Transition rubber; 60, Shock-absorbing rubber; 70, Housing; 80, Small spring; 90, Large spring seat; 100, Large spring; 110, Positioning pin; 120, Support frame; 130, Displacement sensor bolt; 140, Damping ring; 150, Displacement sensor; 160, Magnet; 170, Push rod; 180, Firewall; 190, Housing bolt; 200, Firewall mounting bolt; 210, Push rod spring; 220, Ball-head push rod; 230, Dust cover; 240, Adapter; 250, Pedal connecting rod. Detailed Implementation

[0036] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] like Figures 1 to 7 As shown, this utility model embodiment provides an electronic pedal for an electromechanical braking system, including: a pressure sensor 10, a sensor pad 40, a housing 70, a spring assembly, a positioning mechanism for preventing the spring assembly from rotating, a support frame 120, a displacement sensor 150, a magnet 160, a push rod 170, and a pedal connecting rod 250. The pressure sensor 10 and the sensor pad 40 are both installed at one end of the housing 70. One end of the spring assembly abuts against the sensor pad 40, and the other end of the spring assembly abuts against the support frame 120 through the positioning mechanism. The support frame 120 is slidably installed in the housing 70. The displacement sensor 150 is installed on the housing 70, the magnet 160 is installed on the support frame 120, and the push rod 170 is connected to both the support frame 120 and the pedal connecting rod 250.

[0043] The beneficial effects of this utility model's technical solution are as follows: The pedal input displacement is connected to the front end of the pedal connecting rod. This input displacement drives the support frame via a push rod, causing the magnet installed in the support frame to reciprocate. The displacement signal is captured by a displacement sensor. At the pressure sensor end, the support frame, driven by the push rod, compresses a spring assembly that presses against a sensor pad. The sensor pad then presses against the pressure sensor, thus capturing the pedal pressure signal applied by the entire structure. When the passenger car driver depresses the brake pedal, the internal spring assembly is positioned to ensure that the electronic pedal transmits a precise displacement signal to the displacement sensor during its reciprocating motion. Furthermore, a pressure sensor mechanism is added to the electronic pedal to ensure continuous monitoring and feedback of the pressure signal during the pedal's reciprocating motion, facilitating precise displacement and pressure feedback. The positioning mechanism achieves anti-rotation positioning and precise transmission of displacement signals. The installation of the positioning mechanism prevents rotation during compression, ensuring that the spring assembly does not rotate, thus preventing it from affecting the magnet's magnetic field and consequently the transmission and reception of the displacement sensor's displacement signal, achieving precise displacement feedback. The system employs a combination of a pressure sensor and a displacement sensor to ensure functional safety. This allows the electronic pedal to receive both displacement and pressure signals during operation, facilitating accurate judgment of the driver's intention to apply the brakes and enabling the electromechanical braking system to make comfortable and accurate braking force output decisions.

[0044] Precise displacement and pressure feedback: When the driver of a passenger car presses the brake pedal, the internal spring assembly is positioned to ensure that the electronic pedal transmits a precise displacement signal to the displacement sensor during its reciprocating motion; and a pressure sensor mechanism is added to the electronic pedal to ensure that the pressure signal is constantly monitored and fed back during the pedal's reciprocating motion; this is what constitutes precise displacement and pressure feedback.

[0045] Furthermore, the positioning mechanism is a positioning pin 110, the support frame 120 is provided with a positioning hole, the other end of the spring assembly is provided with a positioning groove, one end of the positioning pin 110 is installed in the positioning hole, and the other end of the positioning pin 110 is installed in the positioning groove.

[0046] The beneficial effects of adopting the above-mentioned further technical solution are as follows: To achieve precise displacement and pressure feedback, a positioning hole is set at the end of the support frame, and a positioning pin is added to cooperate with the large spring to achieve anti-rotation positioning and precise transmission of displacement signals. Placing the positioning pin in the positioning hole of the support frame and installing the large spring with a positioning groove to cooperate with the positioning pin serves to prevent rotation and ensure that the large spring will not rotate during compression, thus affecting the magnetic field of the magnet and consequently affecting the transmission and reception of the displacement sensor's displacement signal, achieving the purpose of precise displacement feedback.

[0047] The positioning pin 110 is pressed into the positioning hole of the support frame 120 and is fixedly connected to the support frame 120.

[0048] Furthermore, the spring assembly includes: a small spring 80, a large spring seat 90, and a large spring 100. The two ends of the small spring 80 abut against the sensor pad 40 and the large spring seat 90, respectively. One end of the large spring seat 90 abuts against the large spring seat 90, and the other end of the large spring seat 90 abuts against the support frame 120 via the positioning mechanism. The large spring seat 90 is sleeved on the push rod 170. The large spring seat 90 has a "U"-shaped structure, and the diameter of the large spring 100 is larger than the diameter of the small spring 80.

[0049] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The pedal input displacement is connected to the front end of the pedal connecting rod. This input displacement drives the support frame via a push rod. Magnets embedded in the support frame reciprocate, and the displacement signal is captured by a displacement sensor. At the pressure sensor end, the support frame, driven by the push rod, compresses a small spring and a large spring, pressing them onto a sensor pad. The sensor pad then presses against the pressure sensor, thereby capturing the pedal pressure signal applied by the entire structure. In the initial position after the entire mechanism is installed, the small spring, through tolerance control, ensures that the pressure sensor is already pressed down by the sensor pad at the same time the entire mechanism is installed, placing it in a pre-compressed state. There is no gap between the pressure sensor and the sensor pad, guaranteeing that the pedal pressure signal is quickly and accurately transmitted the instant the pedal is pressed down.

[0050] To prevent the large spring from rotating freely at the lower end of the support frame and affecting the magnetic field signal, a positioning hole was added to the end of the support frame to press in a positioning pin. The spring (large spring) has a positioning groove, which engages with the positioning pin, ensuring that the spring (large spring) is limited and prevented from rotating on its own.

[0051] Furthermore, one end of the housing 70 is connected to a bottom cover 30 via a bottom cover bolt 20. The bottom cover 30 is provided with a pressure sensor placement slot 31. The pressure sensor 10 is installed in the pressure sensor placement slot 31. The pressure sensor 10 is provided with a pressure sensor force-receiving end 11. One end of the sensor pad 40 is provided with a contact surface 41. The pressure sensor force-receiving end 11 abuts against the contact surface 41.

[0052] The beneficial effects of adopting the above-mentioned further technical solution are: a pressure sensor is placed in the bottom cover, and a sensor pad is used to press on the pressure sensor to achieve the purpose of transmitting pressure signals. Pressure is transmitted to the pressure sensor through the contact surface, and the accurate transmission of pressure signals is achieved through the design of the installation method and the pressure transmission method.

[0053] Furthermore, the other end of the sensor pad 40 is provided with a transition rubber 50 and a shock-absorbing rubber 60. The transition rubber 50 is located on the movement trajectory of the push rod 170, and the shock-absorbing rubber 60 is located on the movement trajectory of the spring assembly.

[0054] The beneficial effects of adopting the above-mentioned further technical solutions are: the transition rubber and the shock-absorbing rubber are used to buffer the push rod, the large spring seat of the elastic component and the sensor pad, to prevent damage and improve stability and reliability.

[0055] Furthermore, a firewall 180 is installed at the other end of the housing 70, one end of the push rod 170 is fixedly connected to the support frame 120, one end of the push rod 170 is connected to a ball-head push rod 220, the ball-head push rod 220 is connected to the pedal connecting rod 250, and a push rod spring 210 is sleeved on the outside of the ball-head push rod 220. The two ends of the push rod spring 210 abut against the firewall 180 and the pedal connecting rod 250 respectively.

[0056] The beneficial effects of adopting the above-mentioned further technical solution are: the firewall is used to limit the support frame; the ball-end push rod is used to connect the push rod to the pedal connecting rod; and the push rod spring is used to reset the ball-end push rod.

[0057] Furthermore, the firewall 180 is connected to the housing 70 via housing bolts 190, and firewall mounting bolts 200 are installed on the firewall 180. The ball-head push rod 220 is connected to the pedal connecting rod 250 via an adapter 240. The two ends of the push rod spring 210 abut against the firewall 180 and the adapter 240 respectively, and a dust cover 230 is fitted on the outer side of the push rod spring 210.

[0058] The beneficial effects of adopting the above-mentioned further technical solutions are: the bolts facilitate the installation and maintenance of components; the adapter allows for detachable connection between the ball joint push rod and the pedal connecting rod, improving applicability; and the dust cover prevents external dust from contaminating the push rod spring and the ball joint push rod.

[0059] Furthermore, a damping ring 140 is installed on the side wall of the support frame 120, and the damping ring 140 abuts against the inner wall of the housing 70.

[0060] The beneficial effects of adopting the above-mentioned further technical solutions are: the setting of the damping ring increases the damping of the support frame, thereby improving the stability and reliability of the system.

[0061] Furthermore, the displacement sensor 150 is mounted on the side wall of the housing 70 by displacement sensor bolts 130; the magnet 160 is embedded in the side wall of the support frame 120, and the position of the magnet 160 is adjacent to the displacement sensor 150.

[0062] The beneficial effects of adopting the above-mentioned further technical solution are: setting a positioning mechanism on the support frame will limit and stop the rotation of the exploration component that affects the magnetic field of the magnet, so that the magnetic signal can be transmitted accurately during the pedaling process, thereby enabling the pedal displacement signal to be accurately transmitted to the displacement sensor.

[0063] In order to overcome the shortcomings of the existing technology of sub-pedal feel simulator in the electromechanical braking system of passenger vehicles, this utility model provides an electronic pedal simulator (for electronic pedals in electromechanical braking systems) with precise displacement and pressure feedback.

[0064] like Figure 7 The pressure sensor 10 is inserted into the groove (pressure sensor placement slot 31) of the sensor base cover (base cover 30). The pressure sensor 10 has two positioning pins that fix and limit its position within the groove (pressure sensor placement slot 31) of the base cover 30; Figure 1 Bottom cover bolts 20 tighten and fix bottom cover 30 to the rear end of housing 70; transition rubber 50 and shock-absorbing rubber 60 are press-fitted onto sensor pad 40; sensor pad 40 abuts against the pressure sensor force-receiving end 11 of pressure sensor 10; as Figure 1 One end of the small spring 80 abuts against the groove inside the sensor pad, the inner hole of the large spring seat 90 abuts against the other end of the small spring 80, one end of the large spring 100 abuts against the outer end plane of the large spring seat 90, and the other end of the large spring 100 has a slot (positioning slot) and is fixedly abutting against the end face of the support frame 120, and the slot (positioning slot) is engaged with the positioning pin 110 (e.g. Figures 3 to 5 The support frame 120 slides and compresses the large and small springs within the housing 70. The inner hole of the support frame 120 is press-fitted with the push rod 170. One end of the push rod 170 is riveted to the ball-head push rod 220. The ball-head push rod 220 is threadedly fixed to the adapter 240, which is also threadedly fixed to the pedal connecting rod 250. The pedal connecting rod 250 is connected to the pedal. Stepping on the pedal pushes the pedal connecting rod 250, the adapter 240, and the ball-head push rod 220, which in turn pushes the support frame 120 to slide and compress within the housing 70 after reaching the push rod 170. Large and small springs; magnet 160 is embedded in support frame 120; displacement sensor 150 is inserted into the limit position through the slot of the housing and tightened by displacement sensor bolt 130; firewall 180 is locked and fixed to the end face of housing 70 by housing bolt 190 and abuts against push rod 170. Firewall 180 is installed on the vehicle by firewall mounting bolt 200. After installation, the large and small springs are in a compressed state inside housing 70; one end of push rod spring 210 abuts against firewall 180 and the other end abuts against end face of adapter 240; it is in a compressed state.

[0065] Figure 2This is a cross-sectional view of a specific embodiment of the present invention. The operating principle is as follows: the pedal is connected to the pedal via a connecting rod 250, which inputs displacement. This input displacement drives a push rod 170, which in turn drives a support frame 120. A magnet 160 embedded in the support frame 120 reciprocates, and a displacement sensor 150 captures the displacement signal. At the pressure sensor end, the support frame 120, driven by the push rod 170, compresses a small spring 80 and a large spring 100, pressing them onto a sensor pad 40. The sensor pad 40 then presses against the pressure sensor 10, thereby capturing the pedal pressure signal applied by the entire structure. To achieve precise displacement and pressure feedback, a positioning pin groove (positioning hole) is provided at the support frame end, with a positioning pin 110 engaging with the large spring 100 to achieve anti-rotation positioning and precise transmission of displacement signals. Additionally, the pressure sensor 10 is placed in the bottom cover 30, and the sensor pad 40 presses against it to transmit pressure signals.

[0066] Specifically, such as Figures 3 to 5 In the process, the support frame 120 is opened (positioning hole) to place the positioning pin 110, and the large spring 100 is slotted (positioning groove) to cooperate with the positioning pin 110 for installation to play the role of anti-rotation positioning, thereby ensuring that the large spring 100 will not rotate during the compression process, thus affecting the magnetic field of the magnet 160, and consequently affecting the transmission and reception of the displacement signal of the displacement sensor 150, so as to achieve the purpose of accurate displacement feedback.

[0067] Specifically, such as Figure 6 and Figure 7 The bottom cover 30 is fixed to the end of the housing 70 using fastener bottom cover bolts 20. A pressure sensor placement slot 31 is provided inside the bottom cover 30 to place the pressure sensor 10. The contact surface 41 of the sensor pad 40 is pressed against the force-receiving end 11 of the pressure sensor. The pressure transmission method is to transmit the force of the entire mechanism by pressing the sensor pad 40. The pedal force is pushed by the push rod 170 to drive the support frame 120 to compress the large spring 100 and the small spring 80, which are pressed onto the sensor pad 40. The pressure is then transmitted to the pressure sensor 10 through the contact surface 41. After the push rod 170 pushes the support frame 120 to fully compress the two springs, the push rod 170 directly presses onto the transition rubber 50 and transmits the pressure to the sensor pad 40. The pressure is then transmitted to the pressure sensor 10 through the contact surface 41. The above installation method and pressure transmission method are used to achieve the purpose of accurately transmitting pressure signals.

[0068] like Figure 1At the starting position after the entire mechanism is installed, the small spring 80 is controlled by tolerance so that the pressure sensor 10 is pressed by the sensing pad 40 at the same time the entire mechanism is installed, and is in a pre-compression state. There is no gap between the pressure sensor 10 and the sensing pad 40, which can ensure that the signal when stepping is quickly and accurately transmitted to the pedal pressure at the moment of stepping.

[0069] 1. A pressure sensor and a displacement sensor are used to ensure functional safety, so that the electronic pedal receives both displacement and pressure signals during the pressing process, accurately judging the driver's intention to press the brake, and enabling the electromechanical braking system to make a comfortable and accurate judgment on the braking force output.

[0070] 2. A positioning guide pin (positioning pin 110) is installed on the support frame to limit and stop the rotation of the large spring that affects the magnetic field of the magnet, so that the magnetic signal can be transmitted accurately during the pedaling process, thereby enabling the pedal displacement signal to be accurately transmitted to the displacement sensor.

[0071] 3. Add a pressure sensor to the rear end of the housing, and use tolerance control to put the entire mechanism in a pre-pressurized state in advance, so that the overall pressure of the mechanism is pressed on the pad (sensor pad). At the moment the driver steps on the pedal, the intention can be accurately transmitted to the pressure sensor.

[0072] Tolerance control here refers to shortening the axial dimensions by controlling the axial length tolerances of the large spring, small spring, support frame, large spring seat, and sensor pad to ensure that after the pressure sensor is installed and the bottom cover is put on, the large and small springs are in a pre-compressed state and press against the pressure sensor end.

[0073] In addition, this utility model also provides a vehicle including the above-mentioned electronic pedal for an electromechanical braking system, and further including a pedal connected to a pedal connecting rod 250.

[0074] The beneficial effects of this utility model's technical solution are as follows: The pedal input displacement is connected to the front end of the pedal connecting rod. This input displacement drives the support frame via a push rod, causing the magnet installed in the support frame to reciprocate. The displacement signal is captured by a displacement sensor. At the pressure sensor end, the support frame, driven by the push rod, compresses a spring assembly that presses against a sensor pad. The sensor pad then presses against the pressure sensor, thus capturing the pedal pressure signal applied by the entire structure. When the passenger car driver depresses the brake pedal, the internal spring assembly is positioned to ensure that the electronic pedal transmits a precise displacement signal to the displacement sensor during its reciprocating motion. Furthermore, a pressure sensor mechanism is added to the electronic pedal to ensure continuous monitoring and feedback of the pressure signal during the pedal's reciprocating motion, facilitating precise displacement and pressure feedback. The positioning mechanism achieves anti-rotation positioning and precise transmission of displacement signals. The installation of the positioning mechanism prevents rotation during compression, ensuring that the spring assembly does not rotate, thus preventing it from affecting the magnet's magnetic field and consequently the transmission and reception of the displacement sensor's displacement signal, achieving precise displacement feedback. The system employs a combination of a pressure sensor and a displacement sensor to ensure functional safety. This allows the electronic pedal to receive both displacement and pressure signals during operation, facilitating accurate judgment of the driver's intention to apply the brakes and enabling the electromechanical braking system to make comfortable and accurate braking force output decisions.

[0075] When the pedal is pressed, the compression spring (spring assembly) transmits the pressure signal to the pressure sensor pad (sensor pad). The pad (sensor pad) presses against the pressure sensor, which then sends out a pressure signal. The vehicle's main control system (controller) receives this signal and determines the driver's pedaling intention. If the pedal is pressed suddenly, the pressure will increase instantaneously, and the braking system will issue an instant braking signal to ensure safety. If the pedal is pressed slowly, the pressure will increase gradually, and the braking system will issue a comfortable braking force signal, causing the electronic braking mechanism to brake slowly, ensuring both safety and user comfort.

[0076] A controller can be installed in the vehicle, and the controller interface wiring harness has connectors to connect with pressure sensors and displacement sensors. It should be noted that the controller's data acquisition methods, analysis methods, comparison methods, calculation methods, judgment methods, and control methods are all existing technologies. Those skilled in the art can easily conceive of how to program and implement them according to actual needs, and will not be elaborated here.

[0077] 1. In addition to ensuring system safety requirements, the addition of a pressure sensor also includes limiting mechanical slots (positioning pins, positioning holes, and positioning slots) and a pressure sensor pre-pressing structure to ensure that the driver's foot can output a pressure signal the instant it is pressed.

[0078] 2. The pressure and displacement parameters are output separately and transmitted to the braking system for comprehensive analysis in order to make a correct and comfortable braking force judgment.

[0079] 3. Ensure that both sensors output two-way SENT (single-sided half-word transmission protocol) signals. In the event of displacement failure, pressure can still provide correct pedal force feedback, which can be uniformly judged and processed by the brake master control system.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electronic pedal for an electromechanical braking system, characterized in that, comprising: a pressure sensor (10), a sensor cushion block (40), a housing (70), a spring assembly, a positioning mechanism for preventing the spring assembly from autorotating, a support frame (120), a displacement sensor (150), a magnet (160), a push rod (170) and a pedal connecting rod (250), wherein the pressure sensor (10) and the sensor cushion block (40) are both mounted at one end of the housing (70), one end of the spring assembly abuts against the sensor cushion block (40), the other end of the spring assembly abuts against the support frame (120) via the positioning mechanism, the support frame (120) is slidably mounted in the housing (70), the displacement sensor (150) is mounted on the housing (70), the magnet (160) is mounted on the support frame (120), and the push rod (170) is connected to the support frame (120) and the pedal connecting rod (250) respectively.

2. An electronic pedal for an electromechanical braking system according to claim 1, characterized in that, The positioning mechanism is a positioning pin (110), a positioning hole is formed in the support frame (120), a positioning groove is formed at the other end of the spring assembly, one end of the positioning pin (110) is mounted in the positioning hole, and the other end of the positioning pin (110) is mounted in the positioning groove.

3. An electronic pedal for an electromechanical braking system according to claim 1, characterized in that, The spring assembly comprises a small spring (80), a large spring seat (90) and a large spring (100), wherein two ends of the small spring (80) abut against the sensor cushion block (40) and the large spring seat (90) respectively, one end of the large spring (100) abuts against the large spring seat (90), the other end of the large spring seat (90) abuts against the support frame (120) via the positioning mechanism; the large spring seat (90) is sleeved on the push rod (170); the large spring seat (90) has a "several"-shaped structure, and the diameter of the large spring (100) is greater than the diameter of the small spring (80).

4. An electronic pedal for an electromechanical braking system according to claim 1, characterized in that, One end of the housing (70) is connected with a bottom cover (30) via bottom cover bolts (20), a pressure sensor placement slot (31) is formed in the bottom cover (30), the pressure sensor (10) is mounted in the pressure sensor placement slot (31), a force receiving end (11) of the pressure sensor is arranged on the pressure sensor (10), a contact surface (41) is arranged at one end of the sensor cushion block (40), and the force receiving end (11) of the pressure sensor abuts against the contact surface (41).

5. An electronic pedal for an electromechanical braking system according to claim 1, characterized in that, The other end of the sensor cushion block (40) is provided with transition rubber (50) and damping rubber (60), the transition rubber (50) is located on the motion track of the push rod (170), and the damping rubber (60) is located on the motion track of the spring assembly.

6. An electronic pedal for an electromechanical braking system according to claim 1, characterized in that, A firewall (180) is installed at the other end of the housing (70). One end of the push rod (170) is fixedly connected to the support frame (120). One end of the push rod (170) is connected to a ball-head push rod (220). The ball-head push rod (220) is connected to the pedal connecting rod (250). A push rod spring (210) is sleeved on the outside of the ball-head push rod (220). The two ends of the push rod spring (210) abut against the firewall (180) and the pedal connecting rod (250) respectively.

7. An electronic pedal for an electromechanical braking system according to claim 6, characterized in that, The firewall (180) is connected to the housing (70) by housing bolts (190). Firewall mounting bolts (200) are installed on the firewall (180). The ball head push rod (220) is connected to the pedal connecting rod (250) through an adapter (240). The two ends of the push rod spring (210) abut against the firewall (180) and the adapter (240) respectively. A dust cover (230) is fitted on the outside of the push rod spring (210).

8. An electronic pedal for an electromechanical braking system according to claim 1, characterized in that, A damping ring (140) is installed on the side wall of the support frame (120), and the damping ring (140) abuts against the inner wall of the housing (70).

9. An electronic pedal for an electromechanical braking system according to claim 1, characterized in that, The displacement sensor (150) is mounted on the side wall of the housing (70) by displacement sensor bolts (130); the magnet (160) is embedded in the side wall of the support frame (120), and the position of the magnet (160) is adjacent to the displacement sensor (150).

10. A vehicle, characterized in that, The electronic pedal for an electromechanical braking system, as described in any one of claims 1 to 9, further includes a pedal connected to a pedal connecting rod (250).

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