Double-loop brake signal generator for electronic control mechanical brake system

Abstract

The invention relates to a double-loop brake signal generator for an electric control mechanical brake system. The double-loop brake signal generator comprises a valve body and a signal generating device, for an electric control mechanical braking system, the whole vehicle does not need to be braked through compressed air, and braking is achieved through electric control. In order to ensure the controllability and safety of braking, a double-loop braking signal generator is adopted, the pedal stroke is converted into analog quantity signals with different voltage values, meanwhile, in order to improve the safety redundancy performance of electric control mechanical braking, two paths of independent analog quantity signals are adopted, braking switch signals are integrated at the same time, and braking signals are provided for a whole vehicle.

Description

Technical Field

[0001] The present invention relates to a dual-circuit braking signal generator for an electro-mechanical braking system, and is particularly applied to the braking system of heavy-duty vehicles, belonging to the technical field of heavy-duty vehicles. Background Art

[0002] In the existing braking system of heavy-duty vehicles, the braking system is a dual-circuit pneumatic braking system. In order to improve the response speed of the braking system and simplify the braking system pipeline, electro-control can be used to replace pneumatic control. Therefore, a device is needed to convert the pedal travel signal into an electrical signal to control the braking intensity. Summary of the Invention

[0003] The purpose of the present invention is to provide a dual-circuit braking signal generator for an electro-mechanical braking system in view of the deficiencies of the prior art, so as to solve the braking signal problem and the braking signal redundancy problem of the electro-mechanical braking system.

[0004] The present invention is implemented by the following technical solutions:

[0005] A dual-circuit braking signal generator for an electro-mechanical braking system, comprising:

[0006] A valve body, on the upper end of which a brake pedal is provided, and inside which a push rod connected to the brake pedal and at least two groups of travel sensors connected to the push rod are provided; each group of the travel sensors has at least two sensors, which are respectively used to convert the travel signal into a rising electrical signal and a falling electrical signal; the rising electrical signal and the falling electrical signal are used for mutual verification;

[0007] A signal generating device, which has at least two and is arranged staggeredly outside the valve body, and on the top wall of which an access port for electrical signal access is provided, and on the bottom wall of which a sending port for electrical signal sending is provided;

[0008] A vehicle controller, which is connected to the signal generating device; the vehicle controller is used to control at least two independent electrical signals in the electro-mechanical braking system.

[0009] As a further description of the present invention, the electrical signal includes a voltage signal and a current signal.

[0010] As a further description of the present invention, a power supply interface for accessing power and a grounding interface for grounding are respectively provided on the valve body, each group of the travel sensors is connected to the power supply interface and the grounding interface, a brake switch is provided on the travel sensor, and the brake switch is connected to the vehicle controller.

[0011] As a further description of the present invention, the valve body adopts a sealed structure.

[0012] As a further description of the present invention, it further includes a damping device; the damping device uses a spring, and the number of springs is at least two and they are arranged side by side on the ejector rod.

[0013] As a further description of the present invention, it further includes a connecting mechanism; the connecting mechanism can adopt a first bolt; the signal generating device is fixed on the valve body through a plurality of second bolts.

[0014] As a further description of the present invention, it further includes a fastening device; the fastening device can adopt a second bolt, and a plurality of second bolts are arranged on the valve body.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The value of the braking signal of this device is determined by the pedal angle, and it can accurately convert the pedal angle signal into an electrical signal, and then provide an accurate braking intention for the vehicle controller; this device is used for no less than two independent signals to improve the reliability of the braking pedal signal and the driving safety of the vehicle; this device is also equipped with a braking switch signal to provide a braking switch signal for the vehicle and is used to activate braking signal devices such as brake lights; this device needs to have dust-proof and waterproof performance to ensure the reliability of the device assembly under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the drawings:

[0018] Figure 1 It is a schematic diagram of the internal structural principle of the dual-circuit braking signal generator of the present invention;

[0019] Figure 2 It is a schematic diagram of the external structure of the dual-circuit braking signal generator of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structural principle of the signal generating device of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0022] In the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and "greater than", "less than", "exceeding", etc. are understood not to include the number itself; "above", "below", "within", etc. are understood to include the number itself. In the description of the present invention, if there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0023] In the present invention, unless otherwise clearly defined, words such as "arranged", "installed", "connected", etc. should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected, or electrically connected or capable of communicating with each other; they can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0024] The following combines Figures 1-3 , to illustrate the embodiments of the present invention.

[0025] The embodiment of the present invention provides a dual-circuit braking signal generator for an electro-mechanical braking system, including:

[0026] A valve body 100, on the upper end of which a brake pedal is arranged, and inside which a push rod 8 connected to the brake pedal and at least two groups of travel sensors connected to the push rod 8 are arranged; each group of travel sensors has at least two, and is respectively used to convert the travel signal into a rising electrical signal 4 and a falling electrical signal 5; the rising electrical signal 4 and the falling electrical signal 5 are used for mutual verification;

[0027] A signal generating device 200, at least two of which are arranged offset on the outside of the valve body 100, and on the top wall of which an access port for electrical signals is opened, and on the bottom wall of which a sending port for electrical signals is opened;

[0028] A vehicle controller, which is connected to the signal generating device 200; the vehicle controller is used to control at least two independent electrical signals in the electro-mechanical braking system.

[0029] It can be understood that when a heavy vehicle executes braking, the brake pedal converts the angle signal into a travel signal through the push rod 8, and the travel signal is converted into different voltage signals inside the valve body 100; the voltage signal has two forms of manifestation, namely the rising electrical signal 4 (increasing) and the falling electrical signal 5 (decreasing), mainly for mutual verification to ensure the accuracy of the braking signal; and

[0030] At least two signal generating devices 200, mainly composed of a valve core 8, a rotating device 9, a rotating magnet 10, and a circuit board chip 11; the valve core 8 is used to transmit the brake pedal stroke signal; the rotating device 9 is used to convert the up-and-down movement into a rotational movement, thereby driving the rotation of the rotating magnet 10, which will cause a change in the magnetic field of the circuit board chip 11, and after logical operation, it is converted into a voltage signal and output from the power supply interface 2; the main function of the signal generating device 200 is to send the stroke signal in the form of a voltage signal and input it to the vehicle controller; for the electro-mechanical braking system, the vehicle does not require compressed air for braking, but uses electricity to achieve braking; to ensure the controllability and safety of braking, and at the same time to improve the safety redundancy performance of electro-mechanical braking, there are at least 2 independent brake signal outputs to ensure the reliability of the brake signal, which can simulate the independent circuits in the dual-circuit pneumatic braking and improve the safety redundancy performance of electro-mechanical braking;

[0031] Of course, the electrical signals include voltage signals, current signals, etc., which can accurately express the brake pedal stroke signal.

[0032] In some embodiments, referring to Figure 1 , on the valve body 100, a power supply interface 2 for accessing the power supply and a grounding interface 1 for grounding are respectively provided. Each group of stroke sensors is connected to the power supply interface 2 and the grounding interface 1. A brake switch 6 is provided on the stroke sensor, and the brake switch 6 is connected to the vehicle controller; when the ejector rod 8 actuates the damping device to cause a change in the stroke, a switch quantity signal is output. This signal does not change with the stroke change and only provides a signal indicating whether a braking action occurs; the switch quantity signal can be used to activate braking signal devices such as brake lights;

[0033] Similarly, referring to Figure 1 , a reserved interface 3 for accessing the trailer signal can also be reserved on the valve body 100;

[0034] As a preferred embodiment of the present invention, referring to Figure 2 , the valve body 100 needs to adopt a sealing structure to protect the internal components of the valve body 100 and has the ability of protection and waterproofing;

[0035] It can be understood that in some embodiments, the damping device is a device with a certain reaction force. The damping of the damping device decreases as the stroke increases. The resistance can remain unchanged or can also change in response to reflect the angle of the brake pedal;

[0036] Preferably, referring to Figure 1 , the damping device adopts a spring 7, and the number of springs is at least two and they are arranged side by side on the ejector rod;

[0037] In some embodiments, the connecting mechanism is mainly used to fasten the signal generating device 200 on the valve body 100;

[0038] Preferably, referring to Figure 2 , the connecting mechanism may employ a first bolt; the signal generating device 200 is fixed to the valve body 100 by a plurality of second bolts.

[0039] In some embodiments, the fastening device is mainly used to fasten the valve body 100 under the brake pedal, and the top end of the push rod 8 is used to connect the brake pedal of a heavy vehicle; it is used to ensure that the angle of the brake pedal can be accurately transmitted into the valve body 100, and then an electrical signal is generated to control the braking force of the braking system;

[0040] Preferably, referring to Figure 2 , the fastening device may employ a second bolt, and a plurality of second bolts are provided on the valve body 100.

[0041] In the description of this specification, the description referring to terms such as "example", "embodiment" or "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] Of course, the present invention is not limited to the above embodiments, and those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. The dual-circuit braking signal generator used in the electro-mechanical braking system is characterized in that Comprising: A valve body, at the upper end of which is provided a brake pedal, and inside which are provided a push rod connected to the brake pedal and at least two sets of travel sensors connected to the push rod; each set of the travel sensors has at least two sensors, which are respectively used to convert travel signals into rising electrical signals and falling electrical signals; the rising electrical signals and the falling electrical signals are used for mutual verification; A signal generating device, at least two of which are arranged offset on the outside of the valve body, and on the top wall of which is provided an access port for electrical signal access, and on the bottom wall of which is provided an emission port for electrical signal emission; A vehicle controller, which is connected to the signal generating device; the vehicle controller is used to control at least two independent electrical signals in the electro-mechanical braking system.

2. The dual-circuit braking signal generator used in the electro-mechanical braking system according to claim 1, characterized in that, The electrical signals include voltage signals and current signals.

3. The dual-circuit braking signal generator used in the electro-mechanical braking system according to claim 2, characterized in that, On the valve body are respectively provided a power supply interface for accessing power and a grounding interface for grounding, each set of the travel sensors is connected to the power supply interface and the grounding interface, and a brake switch is provided on the travel sensors, and the brake switch is connected to the vehicle controller.

4. The dual-circuit braking signal generator used in the electro-mechanical braking system according to claim 1, characterized in that, The valve body adopts a sealed structure.

5. The dual-circuit braking signal generator used in the electro-mechanical braking system according to claim 1, characterized in that, It further includes a damping device; the damping device adopts a spring, and the number of the springs is at least two and they are arranged side by side on the push rod.

6. The dual-circuit braking signal generator for the electro-mechanical braking system according to claim 1, characterized in that, It further includes a connecting mechanism; the connecting mechanism can adopt a first bolt; the signal generating device is fixed on the valve body through a plurality of second bolts.

7. The dual-circuit braking signal generator used in the electro-mechanical braking system according to claim 1, characterized in that, It further includes a fastening device; the fastening device can adopt a second bolt, and a plurality of second bolts are provided on the valve body.

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