CN115402275A - Brake control mechanism and method and engineering machinery - Google Patents

Brake control mechanism and method and engineering machinery Download PDF

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Publication number
CN115402275A
CN115402275A CN202211126351.8A CN202211126351A CN115402275A CN 115402275 A CN115402275 A CN 115402275A CN 202211126351 A CN202211126351 A CN 202211126351A CN 115402275 A CN115402275 A CN 115402275A
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CN
China
Prior art keywords
stroke
pedal
brake
section
braking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211126351.8A
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Chinese (zh)
Inventor
彭世发
谭愿波
卓圣翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Sany Port Equipment Co Ltd
Sany Marine Heavy Industry Co Ltd
Original Assignee
Hunan Sany Port Equipment Co Ltd
Sany Marine Heavy Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Sany Port Equipment Co Ltd, Sany Marine Heavy Industry Co Ltd filed Critical Hunan Sany Port Equipment Co Ltd
Priority to CN202211126351.8A priority Critical patent/CN115402275A/en
Publication of CN115402275A publication Critical patent/CN115402275A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The application relates to the technical field of engineering machinery, in particular to a brake control mechanism, a brake control method and engineering machinery. The application provides a braking control mechanism, including: the pedal is used for moving in a preset stroke when being stepped; the preset stroke comprises a first section of stroke and a second section of stroke; the maximum value in the first stroke section is less than or equal to the minimum value in the second stroke section; the first brake control assembly is used for acquiring the stroke of the pedal, controlling a preset brake mechanism when the stroke of the pedal is in a first section of stroke, and braking by adopting brake pressure corresponding to the stroke of the pedal; and the second brake control component is used for controlling the brake mechanism to brake emergently when the stroke of the pedal is in the second section of stroke. If the first brake control assembly and the related structure thereof are out of order, a driver presses the brake pedal to the bottom by habit and enters a second section of travel of the pedal, and the second brake control assembly can control the brake mechanism to brake emergently.

Description

Brake control mechanism and method and engineering machinery
Technical Field
The application relates to the technical field of engineering machinery, in particular to a brake control mechanism and method and engineering machinery.
Background
With the progress of science and technology and the development of society, more and more engineering machines enter the production and life of people. During operation of the work machine, braking may sometimes be required. The working machine class is therefore generally provided with a brake system.
The brake system in the engineering machinery is mainly an electric control hydraulic brake system. The system can respond to the brake signal in time to brake. However, a fault may occur in the operation of the system, which causes brake failure, and has a great safety hazard.
Disclosure of Invention
In view of the above, the present application is directed to a brake control mechanism, a method and a construction machine, so as to reduce the potential safety hazard of a brake system of the construction machine.
According to a first aspect of embodiments of the present application, there is provided a brake control mechanism including:
the pedal is used for moving in a preset stroke when being stepped; the preset stroke comprises a first section of stroke and a second section of stroke; the maximum value in the first stroke section is less than or equal to the minimum value in the second stroke section;
the first brake control assembly is used for acquiring the stroke of the pedal, controlling a preset brake mechanism when the stroke of the pedal is in a first section of stroke, and braking by adopting brake pressure corresponding to the stroke of the pedal;
and the second brake control component is used for controlling the brake mechanism to brake emergently when the stroke of the pedal is in the second section of stroke.
In one embodiment, the first brake control assembly includes:
the first sensor is used for acquiring the stroke of the pedal;
the first controller is connected with the first sensor and an electric control brake proportional valve of the brake mechanism and used for acquiring the stroke of the pedal, and when the stroke of the pedal is in a first section of stroke, an electric signal is sent to the electric control brake proportional valve based on the stroke of the pedal so as to control the brake mechanism and brake by adopting brake pressure corresponding to the stroke of the pedal;
wherein, the corresponding relation of the brake pressure and the travel of the pedal is as follows: the greater the pedal travel, the greater the corresponding brake pressure.
In one embodiment, the first sensor is an angle sensor for collecting angle information of the pedal;
wherein the angle information is used to characterize the stroke of the pedal.
In one embodiment, the second brake control assembly is a mechanical control assembly or an electrical control assembly.
In one embodiment, the machine control assembly comprises: a push rod structure;
when the pedal is treaded to the second section of stroke, the push rod structure is connected with the pedal;
the push rod structure is also connected with a brake mechanism;
when the pedal is treaded to the second section of travel, the pedal pushes the push rod structure to move, and when the push rod structure moves, the brake mechanism is pushed to move so as to control the brake mechanism to brake emergently.
In one embodiment, the first end of the pushrod structure is coupled to the pedal when the pedal is depressed to a second stroke;
the second end of the push rod structure is connected with a mechanical ejector rod of a first emergency braking manual reversing valve of the braking mechanism;
the third end of the push rod structure is connected with a mechanical ejector rod of a second emergency braking manual reversing valve of the braking mechanism;
when the pedal is treaded to the second section of travel, the pedal pushes the first end of the push rod structure, so that the second end of the push rod structure pushes the first emergency braking manual reversing valve, and the third end of the push rod structure pushes the second emergency braking manual reversing valve to control the brake mechanism to perform emergency braking.
In one embodiment, the electronic control assembly comprises:
the second sensor is used for acquiring the stroke of the pedal;
and the second controller is connected with the second sensor and the parking electric control reversing valve of the braking mechanism and used for acquiring the stroke of the pedal, and when the stroke of the pedal is in a second section of stroke, the second controller sends an electric signal to the parking electric control reversing valve so as to control the braking mechanism to brake emergently.
In one embodiment, the second sensor is an angle sensor for collecting angle information of the pedal; wherein the angle information is used for representing the stroke of the pedal; or the like, or, alternatively,
the second sensor is a pressure sensor, and when the pedal is in the second section of stroke, the pedal presses the pressure sensor; the pressure information detected by the pressure sensor is used for indicating whether the pedal is in the second section of stroke.
According to a second aspect of an embodiment of the present application, there is provided a brake control method applied to the brake control mechanism provided in any one of the embodiments described above, the brake control method including:
acquiring the stroke of a pedal;
when the pedal is in the first section of stroke, a preset brake mechanism is controlled, and brake is performed by adopting brake pressure corresponding to the stroke of the pedal;
when the pedal is in the second stroke, the brake mechanism is controlled to brake emergently.
According to a third aspect of embodiments of the present application, there is provided a construction machine including: a brake mechanism and a brake control mechanism as provided in any of the above embodiments.
According to the brake control mechanism, the stroke of the pedal is divided into a first stroke and a second stroke; the maximum value in the first stroke section is less than or equal to the minimum value in the second stroke section; namely: when a user uses the pedal to send a brake signal, the pedal is firstly enabled to enter a first section of travel. At the moment, the first brake control assembly can collect the stroke of the pedal, controls the preset brake mechanism, adopts the brake pressure corresponding to the stroke of the pedal to brake, and meets the requirement of normal braking of the engineering machinery. If the first brake control assembly and the related structure (wherein the related structure mainly comprises a structure which is used during normal braking and is not used during emergency braking) fail, a driver presses the brake pedal to the bottom due to habit and enters a second section of pedal stroke, and the second brake control assembly can control the brake mechanism to perform emergency braking. Therefore, when partial devices of the braking system are out of order, braking can be completed in time, larger damage is avoided, and potential safety hazards of the existing braking system are reduced.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 is a schematic structural diagram of a brake control mechanism according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of another brake control mechanism provided in the embodiment of the present application.
Fig. 3 is a schematic flow chart of a braking control method according to an embodiment of the present application.
Reference numerals:
1. a pedal; 21. a first sensor; 22. a first controller; 31. a push rod structure; 32. a second sensor; 33. a second controller; 41. an oil pump; 42. an accumulator charge valve; 43-a brake accumulator; 44. a first emergency braking manual directional control valve; 45. a second emergency braking manual reversing valve; 46. an electric control brake proportional valve; 47 liquid filling overflow valve; 48. a drive axle; 49. parking electrically controlled directional control valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Summary of the application
With the progress of science and technology and the development of society, more and more engineering machines enter the production and life of people. During operation of the work machine, braking may sometimes be required. The working machine class is therefore generally provided with a brake system.
At present, a braking system in engineering machinery is mainly an electric control hydraulic braking system. The system can respond to the brake signal in time to brake. However, a fault may occur in the operation of the system, which causes brake failure, and has a great safety hazard.
In order to solve the above problems, the present application provides a brake control mechanism, which divides the stroke of a pedal into a first stroke and a second stroke; the maximum value in the first stroke section is less than or equal to the minimum value in the second stroke section; namely: when a user uses the pedal to send a brake signal, the pedal is firstly enabled to enter a first section of stroke. At the moment, the first brake control assembly can collect the stroke of the pedal, controls the preset brake mechanism, adopts the brake pressure corresponding to the stroke of the pedal to brake, and meets the requirement of normal braking of the engineering machinery. If the first brake control assembly and the related structure (wherein the related structure mainly comprises a structure which is used during normal braking and is not used during emergency braking) fail, a driver presses the brake pedal to the bottom due to habit and enters a second section of pedal stroke, and the second brake control assembly can control the brake mechanism to perform emergency braking. Therefore, when partial devices of the braking system are out of order, braking can be completed in time, larger damage is avoided, and potential safety hazards of the existing braking system are reduced.
Having described the basic principles of the present application, various non-limiting embodiments of the present application will now be described with reference to the accompanying drawings.
Exemplary brake control mechanism
Fig. 1 is a schematic structural diagram of a brake control mechanism according to an embodiment of the present application. As shown in fig. 1, the construction machine includes: the pedal 1 is used for moving in a preset stroke when being stepped; the preset stroke comprises a first section of stroke and a second section of stroke; the maximum value in the first stroke section is less than or equal to the minimum value in the second stroke section;
the first brake control assembly is used for acquiring the stroke of the pedal 1, controlling a preset brake mechanism when the stroke of the pedal 1 is in a first section of stroke, and braking by adopting brake pressure corresponding to the stroke of the pedal 1;
and the second brake control component is used for controlling the brake mechanism to brake emergently when the stroke of the pedal 1 is in the second section of stroke.
The arrangement is that the stroke of the pedal 1 is divided into a first section of stroke and a second section of stroke; the maximum value in the first section of stroke is less than or equal to the minimum value in the second section of stroke; namely: when a user uses the pedal 1 to issue a brake signal, the pedal 1 is firstly caused to enter a first stroke. At this moment, the first brake control assembly can collect the stroke of the pedal 1, control the preset brake mechanism, and brake by adopting the brake pressure corresponding to the stroke of the pedal 1, so that the normal braking of the engineering machinery is met. If the first brake control assembly and the related structure (wherein the related structure mainly comprises a structure which is used during normal braking and is not used during emergency braking) fail, a driver presses the brake pedal 1 to the bottom due to habit and enters a second section of stroke of the pedal 1, and at the moment, the second brake control assembly can control the brake mechanism to perform emergency braking. Therefore, when partial devices of the braking system are out of order, braking can be completed in time, larger damage is avoided, and potential safety hazards of the existing braking system are reduced.
In practical application, for better braking, the stroke of the brake pedal can be divided into three sections: namely the "first stroke", "second stroke" and "overtravel" referred to in this application. Wherein the overstroke is the stroke between the first and second strokes "
For example: the "first stroke" may be: the stepping angle of the pedal 1 is 0-70% of the stroke; the "second stroke" may be: the stepping angle of the pedal 1 is 90-100% of the stroke; the overtravel "is a stroke in which the stepping angle of the pedal 1 is 70% to 90%.
So set up: when the stroke is 0-70%, a brake pedal angle signal is transmitted to the controller, the controller outputs a control signal to the electric proportional brake valve according to the angle, and the larger the pedal angle is, the larger the brake pressure output by the electric proportional brake valve is. When the stroke is 70% -90%, the pedal does not output an angle signal at the angle, and the pushing torque of the hydraulic manual reversing valve is not transmitted. When the stroke is 90% -100%, the manual reversing valve is pushed to reverse, and at the moment, the pressure of the energy accumulator acts on the axle through the hydraulic control reversing valve, so that emergency braking protection is realized.
It should be noted that the specific structure of the first brake control assembly is various. The present application provides an explanation of one of the specific structures, which is as follows:
the first brake control assembly includes:
a first sensor 21 for acquiring a stroke of the pedal 1;
the first controller 22 is connected with the first sensor 21 and the electric control brake proportional valve 46 of the brake mechanism and is used for acquiring the stroke of the pedal 1, and when the stroke of the pedal 1 is in a first section of stroke, an electric signal is sent to the electric control brake proportional valve 46 based on the stroke of the pedal 1 so as to control the brake mechanism and brake by adopting brake pressure corresponding to the stroke of the pedal 1;
wherein, the corresponding relation between the brake pressure and the stroke of the pedal 1 is as follows: the greater the stroke of the pedal 1, the greater the corresponding brake pressure.
So configured, when the driver steps on the pedal 1 in the first stroke, the electrically controlled brake proportional valve 46 can execute the same control strategy as the prior art electrically controlled brake proportional valve 46, so that the driver can perform normal braking through the pedal 1. Namely: when light braking is needed, the driver only needs to slightly step on the pedal 1; the driver can adjust the amplitude of stepping on the pedal 1 based on the required braking force to achieve normal flexible braking.
Wherein, the first sensor 21 is an angle sensor for collecting the angle information of the pedal 1; wherein the angle information is used to characterize the stroke of the pedal 1. The stepping width of the driver (i.e., the stroke of the pedal 1) can thus be determined based on the angle information of the pedal 1.
It should be noted that, in the prior art, the braking mode is often adopted, but in the braking mode, if the 'first braking control component or the electrically controlled braking proportional valve 46' fails, the situation of incapability of braking may occur, and at this time, other accidents are easily caused. For example, in the course of a vehicle, a traffic accident may occur if the brake system fails.
Based on this, the present application provides a second brake control assembly corresponding to a second stroke of the pedal 1. When the vehicle pedal 1 enters the second stroke, it is considered that a malfunction or an accident has occurred at this time, and emergency braking is required. Therefore, the second brake control component is used for controlling the brake mechanism to brake emergently when the stroke of the pedal 1 is in the second section of stroke.
It should be noted that the second brake control assembly is a mechanical control assembly or an electrical control assembly. Mechanical control assemblies may not be as reliable in use as electronic control assemblies, but are more reliable than electronic control assemblies.
In one embodiment, the machine control assembly comprises: a push rod structure 31;
when the pedal 1 is stepped to the second stroke, the push rod structure 31 is connected with the pedal 1;
the push rod structure 31 is also connected with a brake mechanism;
when the pedal 1 is stepped to the second stroke, the pedal 1 pushes the push rod structure 31 to move, and when the push rod structure 31 moves, the brake mechanism is pushed to move so as to control the brake mechanism to brake emergently.
So set up, whole second brake control subassembly comprises mechanical structure, and does not relate to electronic circuit, can not receive influences such as electromagnetic interference, and the reliability is higher.
Specifically, when the pedal 1 is stepped to the second stroke, the first end of the push rod structure 31 is connected with the pedal 1; the second end of the push rod structure 31 is connected with a mechanical top rod of a first emergency braking manual reversing valve 44 of the braking mechanism; the third end of the push rod structure 31 is connected with a mechanical ejector rod of a second emergency braking manual reversing valve 45 of the braking mechanism; when the pedal 1 is stepped to the second stroke, the pedal 1 pushes the first end of the push rod structure 31, so that the second end of the push rod structure 31 pushes the first emergency braking manual directional control valve 44, and the third end of the push rod structure 31 pushes the second emergency braking manual directional control valve 45, so as to control the brake mechanism to perform emergency braking. It should be noted that the first emergency brake manual direction valve 44 and the second emergency brake manual direction valve 45 are emergency brake structures commonly used in the art, such as hand brakes. The emergency braking of the vehicle can be completed based on the partial structure of the existing mechanical manual brake of the engineering machinery in the scheme provided by the application. To the engineering machinery that does not have mechanical type manual brake structure, can set up braking mechanism according to the mechanical type brake structure among the prior art and the scheme that this application provided.
The core of the scheme provided by the application is that when the pedal 1 is stepped to the second stroke, a mechanical braking control mechanism is adopted to control the engineering machinery to brake.
With particular reference to fig. 1, the braking control mechanism comprises: the pedal 1, an angle sensor, a controller and a push rod structure 31; the brake mechanism specifically includes: the emergency braking system comprises an oil pump 41, an accumulator charging valve 42, a braking accumulator 43, a first emergency braking manual reversing valve 44, a drive axle 48, a second emergency braking manual reversing valve 45, an electric control braking proportional valve 46 and a charging overflow valve 47.
The angle sensor is arranged on the pedal 1, the stroke of the pedal 1 is divided into two sections, in the first section of stroke, the controller controls the electric control brake proportional valve 46 to output corresponding brake pressure by identifying the signal of the angle sensor, and normal braking under the conventional working condition is realized; in the second section of stroke, the pedal 1 is connected with the mechanical ejector rods of the first emergency manual reversing valve and the second emergency manual reversing valve through the push rod structure 31, and is used for driving the mechanical ejector rods of the first emergency manual reversing valve and the second emergency manual reversing valve to perform emergency braking.
When the electric control brake proportional valve 46 is stuck, the power is cut off accidentally, the controller is down, the angle sensor fails and other accidents occur, when a driver normally steps on the brake pedal 1 to a first section of stroke, the vehicle has no braking effect, immediately the driver steps on the brake pedal 1 to a second section of stroke, at the moment, the pedal 1 push rod pushes the first emergency brake manual reversing valve 44 and the second emergency brake manual reversing valve 45 in sequence, the brake energy accumulator pressure oil reaches the axle through the first emergency brake manual reversing valve 44, and the pressure is reduced through the second emergency brake manual reversing valve 45, so that the vehicle braking is realized.
Referring to fig. 2, in one embodiment, the electronic control assembly provided by the applicant comprises: the automatically controlled subassembly includes:
a second sensor 32 for acquiring the stroke of the pedal 1;
and the second controller 33 is connected with the second sensor 32 and a parking electronic control reversing valve 49 of the brake mechanism and is used for acquiring the stroke of the pedal 1 and sending an electric signal to the parking electronic control reversing valve 49 when the stroke of the pedal 1 is in the second section of stroke so as to control the brake mechanism to brake emergently.
With the arrangement, when the driver treads the pedal 1 to the second section of travel, the electronic control assembly can perform emergency braking through the parking electronic control reversing valve 49 of the engineering machinery.
Specifically, the second sensor 32 is an angle sensor, and is used for collecting angle information of the pedal 1; wherein the angle information is used for representing the stroke of the pedal 1; or the like, or, alternatively,
the second sensor 32 is a pressure sensor, and when the pedal 1 is in the second stroke, the pedal 1 presses the pressure sensor; the pressure information detected by the pressure sensor is used for indicating whether the pedal 1 is in the second stroke.
When the second sensor 32 is an angle sensor, the second sensor 32 may be the same sensor as the first sensor 21. The corresponding first controller 22 may be the same controller as the second controller 33.
In summary, in the brake control mechanism provided by the present application, if the first brake control component and the electrically controlled brake proportional valve 46 are out of order, the driver will habitually step the pedal 1 to the limit, and at this time, the pedal 1 will enter the second section of stroke, and emergency braking is performed through the second brake control component and the matched brake mechanism.
Note that, for convenience of illustration, the first brake control assembly is not shown in fig. 2.
Exemplary method
Fig. 3 is a flowchart illustrating a brake control method according to an embodiment of the present application. The method of fig. 3 may be applied to the brake control mechanism provided in any of the above embodiments, and the embodiments of the present application do not limit this. As shown in fig. 3, the brake control method includes the following.
S310: acquiring the stroke of a pedal;
the manner of obtaining the pedal stroke may be to obtain angle information of the pedal through a preset angle sensor disposed on the pedal, and represent the pedal stroke through the angle information of the pedal.
S320: when the pedal is in the first section of stroke, a preset brake mechanism is controlled, and brake is performed by adopting brake pressure corresponding to the stroke of the pedal;
it should be noted that the corresponding relationship between the brake pressure and the pedal stroke is as follows: the greater the pedal travel, the greater the corresponding brake pressure. The arrangement is that the driver can control the pedal to move in the first section of stroke so as to brake flexibly.
S330: when the pedal is in the second stroke, the brake mechanism is controlled to brake emergently.
If the first brake control assembly and the related structure (wherein the related structure mainly comprises a structure which is used during normal braking and is not used during emergency braking) fail, a driver presses the brake pedal to the bottom due to habit and enters a second section of pedal stroke, and the second brake control assembly can control the brake mechanism to perform emergency braking. Therefore, when partial devices of the braking system are out of order, braking can be completed in time, greater damage is avoided, and potential safety hazards of the existing braking system are reduced.
Exemplary working machine
An embodiment of the present application provides a construction machine, including: a brake mechanism and a brake control mechanism as provided in any of the embodiments described above.
Thus, the brake control mechanism of the engineering machinery divides the stroke of the pedal into a first section of stroke and a second section of stroke; the maximum value in the first stroke section is less than or equal to the minimum value in the second stroke section; namely: when a user uses the pedal to send a brake signal, the pedal is firstly enabled to enter a first section of stroke. At the moment, the first brake control assembly can collect the stroke of the pedal, controls the preset brake mechanism, adopts the brake pressure corresponding to the stroke of the pedal to brake, and meets the requirement of normal braking of the engineering machinery. If the first brake control assembly and the related structure (wherein the related structure mainly comprises a structure which is used during normal braking and is not used during emergency braking) fail, a driver presses the brake pedal to the bottom due to habit and enters a second section of pedal stroke, and the second brake control assembly can control the brake mechanism to perform emergency braking. Therefore, when partial devices of the braking system are out of order, braking can be completed in time, larger damage is avoided, and potential safety hazards of the existing braking system are reduced.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

Claims (10)

1. A brake control mechanism, comprising:
the pedal is used for moving in a preset stroke when being stepped; the preset stroke comprises a first section of stroke and a second section of stroke; the maximum value in the first stroke section is less than or equal to the minimum value in the second stroke section;
the first brake control assembly is used for acquiring the stroke of the pedal, controlling a preset brake mechanism when the stroke of the pedal is in a first section of stroke, and braking by adopting brake pressure corresponding to the stroke of the pedal;
and the second brake control component is used for controlling the brake mechanism to brake emergently when the stroke of the pedal is in the second section of stroke.
2. The brake control mechanism of claim 1, wherein the first brake control assembly comprises:
the first sensor is used for acquiring the stroke of the pedal;
the first controller is connected with the first sensor and an electric control brake proportional valve of the brake mechanism and used for acquiring the stroke of the pedal, when the stroke of the pedal is in a first section of stroke, an electric signal is sent to the electric control brake proportional valve based on the stroke of the pedal so as to control the brake mechanism, and brake is carried out by adopting brake pressure corresponding to the stroke of the pedal;
wherein, the corresponding relation between the brake pressure and the travel of the pedal is as follows: the greater the pedal travel, the greater the corresponding brake pressure.
3. The brake control mechanism of claim 2, wherein the first sensor is an angle sensor;
the angle sensor is arranged on the pedal and used for acquiring angle information of the pedal;
wherein the angle information is used to characterize the travel of the pedal.
4. The brake control mechanism of claim 1, wherein the second brake control assembly is a mechanical control assembly or an electrical control assembly.
5. The brake control mechanism of claim 4, wherein the mechanical control assembly comprises: a push rod structure;
when the pedal is stepped to a second stroke, the push rod structure is connected with the pedal;
the push rod structure is also connected with the brake mechanism;
when the pedal is stepped to a second section of stroke, the pedal pushes the push rod structure to move, and when the push rod structure moves, the brake mechanism is pushed to move so as to control the brake mechanism to brake emergently.
6. The brake control mechanism of claim 5, wherein the first end of the pushrod structure is coupled to the pedal when the pedal is depressed to a second stroke;
the second end of the push rod structure is connected with a mechanical ejector rod of a first emergency braking manual reversing valve of the braking mechanism;
the third end of the push rod structure is connected with a mechanical ejector rod of a second emergency braking manual reversing valve of the braking mechanism;
when the pedal is trampled to a second section of travel, the pedal pushes the first end of the push rod structure, so that the second end of the push rod structure pushes the first emergency braking manual reversing valve, and the third end of the push rod structure pushes the second emergency braking manual reversing valve to control the braking mechanism to perform emergency braking.
7. The brake control mechanism of claim 4, wherein the electronic control assembly comprises:
the second sensor is used for acquiring the stroke of the pedal;
and the second controller is connected with the second sensor and the parking electronic control reversing valve of the braking mechanism and used for acquiring the stroke of the pedal, and when the stroke of the pedal is in a second section of stroke, the second controller sends an electric signal to the parking electronic control reversing valve so as to control the braking mechanism to perform emergency braking.
8. The brake control mechanism of claim 7, wherein the second sensor is an angle sensor for collecting angle information of the pedal; wherein the angular information is used to characterize the travel of the pedal; or the like, or, alternatively,
the second sensor is a pressure sensor, and when the pedal is in a second section of stroke, the pedal presses the pressure sensor; the pressure information detected by the pressure sensor is used for indicating whether the pedal is in the second stroke or not.
9. A brake control method applied to the brake control mechanism according to any one of claims 1 to 8, the brake control method comprising:
acquiring the stroke of a pedal;
the pedal is used for moving in a preset stroke when being stepped; the preset stroke comprises a first section of stroke and a second section of stroke; the maximum value in the first section of stroke is less than or equal to the minimum value in the second section of stroke;
when the pedal is in a first section of stroke, controlling a preset brake mechanism, and braking by adopting brake pressure corresponding to the stroke of the pedal;
and when the pedal is in a second section of stroke, controlling the brake mechanism to brake emergently.
10. A work machine, comprising: a brake mechanism and a brake control mechanism as claimed in any one of claims 1 to 8.
CN202211126351.8A 2022-09-15 2022-09-15 Brake control mechanism and method and engineering machinery Pending CN115402275A (en)

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Publication number Priority date Publication date Assignee Title
US20090105919A1 (en) * 2007-10-17 2009-04-23 Gm Global Technology Operations, Inc. Method and System for Determining Initiation of a Panic Braking Maneuver
CN108407710A (en) * 2018-03-13 2018-08-17 无锡烁然机械科技有限公司 Brake detection device, intelligent braking monitoring system and its method
CN109572438A (en) * 2017-09-29 2019-04-05 比亚迪股份有限公司 Electric car and its regenerating brake control method, device
CN111717035A (en) * 2020-06-23 2020-09-29 徐工集团工程机械股份有限公司科技分公司 Braking system and braking method for super-tonnage electric transmission loader
CN111731249A (en) * 2020-06-30 2020-10-02 徐工集团工程机械股份有限公司科技分公司 Electric control machinery brake hydraulic system and engineering machinery thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090105919A1 (en) * 2007-10-17 2009-04-23 Gm Global Technology Operations, Inc. Method and System for Determining Initiation of a Panic Braking Maneuver
CN109572438A (en) * 2017-09-29 2019-04-05 比亚迪股份有限公司 Electric car and its regenerating brake control method, device
CN108407710A (en) * 2018-03-13 2018-08-17 无锡烁然机械科技有限公司 Brake detection device, intelligent braking monitoring system and its method
CN111717035A (en) * 2020-06-23 2020-09-29 徐工集团工程机械股份有限公司科技分公司 Braking system and braking method for super-tonnage electric transmission loader
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Application publication date: 20221129