CN216401401U

CN216401401U - Intelligent sub-control hydraulic brake system

Info

Publication number: CN216401401U
Application number: CN202123332556.5U
Authority: CN
Inventors: 齐世勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-29
Anticipated expiration: 2031-12-28

Abstract

The utility model discloses an intelligent sub-control hydraulic brake system which comprises a control unit, a plurality of independent hydraulic execution units and a sensing unit, wherein each hydraulic execution unit comprises a hydraulic oil tank, an electric hydraulic pump, a first one-way valve, a high-pressure oil storage barrel, a second one-way valve and a master brake pump, wherein the electric hydraulic pump, the first one-way valve, the high-pressure oil storage barrel, the second one-way valve and the master brake pump are sequentially communicated in a closed mode through hydraulic oil pipes; the control unit is electrically connected with the sensing unit and the hydraulic execution unit. The utility model provides a brand-new braking technical scheme, which can completely replace the existing vehicle braking system and simultaneously overcome the problem of brake failure caused by leakage fault of the existing braking system.

Description

Intelligent sub-control hydraulic brake system

Technical Field

The utility model relates to the technical field of vehicle brake control systems, in particular to an independent control brake system based on hydraulic pressure, and particularly relates to an intelligent sub-control hydraulic brake system.

Background

Existing vehicle braking systems are mainly classified into two categories: one type adopts hydraulic braking, the other type adopts pneumatic braking, and the principle of the pneumatic braking is to realize clamping and holding between mechanical structures through the pressure action of fluid so as to achieve the purpose of braking.

The existing hydraulic brake system is characterized in that a brake master cylinder is associated to generate hydraulic driving force through the action of a brake pedal, the hydraulic driving force is uniformly distributed to each brake cylinder through a hydraulic pipeline, and a brake block is pushed by a brake cylinder piston to clamp a brake disc to generate braking force to realize braking. The existing hydraulic brake system has a good effect in a normal working state, but if any part of a hydraulic pipeline is leaked and decompressed, the whole brake system loses the brake force, the brake failure occurs, and the traffic safety is greatly threatened. In order to solve the problem and improve the reliability of a brake system, most of the existing hydraulic pipelines of the automobile adopt metal pipes to replace rubber pipes, but the rubber hydraulic pipelines still inevitably exist because a wheel cylinder of the automobile needs to turn along with wheels, and the rubber pipelines and joint parts are potential safety hazard points of leakage.

The other air-break brake is generally used on buses or trucks, the working principle is relatively reliable, but a large vehicle needs very large braking force, so that a new technical problem is introduced; because a plurality of wheels of the whole vehicle are a set of braking system, when the vehicle is driven in a cold state, the condition of insufficient air pressure often occurs, the vehicle which is relatively old in winter or in years is particularly obvious, and the vehicle is generally driven after the air pressure is increased to the working pressure by the air pump in the cold state. And a large amount of harmful substances such as sulfide and carbon monoxide can be generated in the process of cold idling and vehicle heating to cause environmental pollution. Furthermore, the brakes of the heavy-duty trucks are often equipped with water drenchers, and when the water drenchers break down, the brake drum temperature can be increased sharply by continuously braking, so that tire burst accidents are caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of the existing vehicle brake control system, the intelligent sub-control hydraulic brake system can fundamentally solve the problem of brake failure caused by brake pipeline leakage, and can still provide normal braking on the premise of hydraulic pump failure; in addition, the brake of one or more wheels can be selectively closed, so that the problem that the temperature of a brake drum is rapidly increased to finally cause tire burst due to the fault of a water sprayer of one wheel of a heavy truck is solved.

The intelligent sub-control hydraulic brake is adopted, and two sets of independent electric hydraulic pumps are arranged to form a complementary action, so that the normal work of a brake system can not be influenced at all when any one electric hydraulic pump breaks down, a driver has sufficient time to maintain after finding the fault, and the hidden danger of anchoring or traffic accidents is avoided.

According to the utility model, each oil way node is provided with a sensor, so that a driver can intuitively master the working state of the whole brake system, and meanwhile, the problem of pressure loss caused by pipeline leakage is avoided by arranging a plurality of one-way valves at specific positions in a pipeline.

According to the utility model, each control slave cylinder is also provided with the electromagnetic valve, so that the oil supply of any brake slave cylinder can be independently closed at any time, and the problem of tire burst caused by incapability of cooling the brake drum due to high temperature caused by water sprayer failure is effectively solved.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the utility model provides an intelligent sub-control hydraulic brake system which comprises a control unit, a plurality of independent hydraulic execution units and a sensing unit, wherein each hydraulic execution unit comprises a hydraulic oil tank, an electric hydraulic pump, a first one-way valve, a high-pressure oil storage barrel, a second one-way valve and a master brake pump which are sequentially communicated in a sealing mode through a hydraulic oil pipe;

the sensing unit comprises an oil mass sensor arranged in the hydraulic oil tank, a first oil pressure sensor used for detecting the oil pressure at the outlet of the electric hydraulic pump, a second oil pressure sensor used for detecting the oil supply pressure of the high-pressure oil storage barrel, a third oil pressure sensor used for detecting the oil pressure at the outlet of the control cylinder or a fourth oil pressure sensor used for detecting the oil pressure of the brake cylinder; the sensing unit further comprises a first oil pressure sensor for detecting the oil pressure of an outlet of the electric hydraulic pump and a temperature sensor for detecting the working temperature of the brake cylinder.

The control unit is electrically connected with the sensing unit and the hydraulic execution unit.

In order to avoid the problem that the electric hydraulic pump continues to supply pressure after reaching the preset pressure due to the failure of the second oil pressure sensor, so that the high-pressure oil storage barrel explodes, preferably, the sensing unit further comprises a displacement sensor which is arranged in the high-pressure oil storage barrel and is positioned at the center of the bottom. The effect of displacement sensor is the effect of an insurance for the inside stroke of real-time supervision high pressure oil storage bucket, because of unknown reason can't be when the confession pressure during operation of presetting the pressure value and stopping electric hydraulic pump, along with high pressure oil storage bucket pressure increases gradually, when arriving the warning stroke that displacement sensor can monitor, displacement sensor will send signal to the control unit, thereby stop electric hydraulic pump's work immediately through the control unit, avoid exploding the jar occurence of failure.

It should be noted that, in order to avoid the problem of cylinder explosion due to the out-of-control system caused by the failure of the control unit, the displacement sensor may be replaced by a mechanical travel switch, and when the electric hydraulic pump is in an out-of-control state and continuously supplies pressure, the pressure of the high-pressure oil storage tank gradually increases, and when the electric hydraulic pump reaches an alarm stroke, the gland will collide with the travel switch to trigger the switch to forcibly disconnect the power supply of the electric hydraulic pump, thereby playing a role in protection.

In order to be compatible with the existing different types of vehicle brake refitting, preferably, the brake master cylinder comprises a master cylinder shell, a first cavity for sliding and sealing installation of a master cylinder valve core is arranged in the master cylinder shell, an oil return port with the inner diameter smaller than that of the first cavity is integrally arranged at one end of the master cylinder shell, a limiting mechanism is clamped on the inner wall of the other end of the master cylinder shell, and the master cylinder valve core is limited by the limiting mechanism and the oil return port to axially slide in the first cavity; the oil pump is characterized in that at least one pair of a master cylinder oil inlet and a master cylinder oil outlet is arranged on the outer wall of the master cylinder shell, a T-shaped oil passage used for respectively communicating the master cylinder oil inlet and the oil return port or communicating the master cylinder oil outlet and the oil return port through position change is arranged on the master cylinder valve core, the T-shaped oil passage is in sliding and sealing communication with the oil return port through a telescopic oil pipe integrally formed with the master cylinder valve core, and a reset spring used for pushing the master cylinder valve core to reset is sleeved on the outer circumferential side wall of the telescopic oil pipe; the master cylinder shell is provided with a support, and the support is hinged with a pull arm used for controlling the extension of the master cylinder valve core. The pull arm is the only part for controlling the valve core of the master cylinder, and can establish a driving relation with the existing vehicle brake pedal through a pull wire connection mode, a connecting rod hinge mode and the like, so that the control of the valve core of the master cylinder is realized by trampling the original brake pedal of the vehicle. And the telescopic oil pipe is provided with a limiting step for limiting the downward movement of the master cylinder valve core. When a driver treads a brake pedal and controls the valve core of the master cylinder to move downwards through the pull arm, the maximum stroke is in a state that the limiting step is abutted against and contacted with the master cylinder shell, at the moment, the T-shaped oil passage is respectively communicated with the oil inlet of the master cylinder, the T-shaped oil passage and the oil return port, and high-pressure hydraulic oil from the high-pressure oil storage barrel quickly enters the brake slave cylinder to perform braking action, so that quick braking is realized.

In order to ensure the linear relation between the moving position and the braking of the master cylinder valve core, preferably, an annular oil collecting groove is further arranged on the circumferential side wall of the master cylinder valve core close to the T-shaped oil passage. Because the number of the oil inlet holes of the T-shaped oil passage is two, if the master cylinder valve core axially rotates, the closed communication between the T-shaped oil passage and the master cylinder oil inlet or the master cylinder oil outlet cannot be influenced no matter how many degrees the master cylinder valve core deflects under the action of the annular oil collecting groove, and therefore the working reliability of the master cylinder valve core is improved.

In order to facilitate the dismouting, compromise simultaneously sliding seal's technological effect, preferably, stop gear is in including dismantling fixed joint first jump ring and second jump ring on the total pump casing inner wall, and set up first oil blanket between first jump ring and the second jump ring. The first clamp spring and the second clamp spring are embedded in the inner wall of the master cylinder shell to achieve axial fixation, the first oil seal is always limited at a fixed position, and the first oil seal is respectively in sliding contact with the master cylinder valve core and the master cylinder shell to achieve sealing.

In order to realize independent control of braking of each wheel, preferably, the control wheel cylinder comprises a wheel cylinder shell, a wheel cylinder oil inlet arranged at the bottom of the wheel cylinder shell and a wheel cylinder piston arranged in the wheel cylinder shell in a sliding sealing manner, a wheel cylinder oil outlet is arranged at the upper end of the wheel cylinder shell, and an electromagnetic valve for controlling the on-off of an oil way and a third oil pressure sensor for detecting the oil pressure of the wheel cylinder oil outlet are detachably and hermetically connected to the wheel cylinder oil outlet; and an avoidance blind hole for avoiding the electromagnetic valve core is formed in one side, close to the electromagnetic valve, of the cylinder piston. When the control slave cylinder is in normal work, the solenoid valve is always in a conducting state, when the oil pressure detected by a third oil pressure sensor positioned at an oil outlet of the slave cylinder has obvious pressure loss and represents that the corresponding brake has obvious brake failure fault, in order to avoid leakage of hydraulic oil, a driver manually gives an instruction to close the corresponding solenoid valve through the control unit, so that the slave cylinder is closed aiming at a certain independent control, the problem of hydraulic pressure loss of the whole brake system caused by local hydraulic oil leakage is avoided, and the brake of other wheels is not influenced. Compared with the prior art, the improved structure can still keep all the braking capacities of all the wheels except the failed wheel under the condition of hydraulic oil leakage, greatly improves the reliability and the fault resistance of the brake, and reduces brake failure traffic accidents caused by brake oil leakage.

In order to realize not receiving the engine stall influence, can provide brake braking force under emergency all the time, preferably, high pressure oil storage bucket includes the oil drum casing, airtight being provided with the end cover can be dismantled to oil drum casing one end, other end coaxial arrangement has the pneumatic cylinder, airtight sliding is provided with the pressure piston in the pneumatic cylinder, the pressure piston passes through the connecting rod and sets up with axial reciprocating sliding gland in the oil drum casing, the gland with be provided with high-pressure spring between the end cover, the pneumatic cylinder is close to end cover one end and is provided with spacing sealing mechanism, the pneumatic cylinder other end communicates with the exit end of first check valve and the entrance point of second check valve respectively. When the brake pedal is not stepped on, the high-pressure oil storage barrel is in a pressure accumulation state, the electric hydraulic pump continuously pumps hydraulic oil in the hydraulic oil tank into the hydraulic cylinder, the hydraulic oil overcomes the elasticity of the high-pressure spring and sequentially pushes the connecting rod and the pressing cover to compress the high-pressure spring through the pressure supply piston, meanwhile, the hydraulic oil entering the hydraulic cylinder is more and more along with the sliding of the pressure supply piston to one side of the high-pressure spring, when the pressure of the hydraulic oil in the hydraulic cylinder reaches a preset value, the electric hydraulic pump stops oil supply, the pressure value of the hydraulic oil is always kept in a preset value state under the action of the high-pressure spring, and the pressure storage process is completed. When the brake pedal is stepped on, the brake master cylinder is opened, and high-pressure hydraulic oil in the hydraulic cylinder instantly supplies oil under the action of the high-pressure spring, so that the braking action is realized.

In order to strengthen the reliability of the pressure supply piston, preferably, the pressure supply piston is provided with second oil seals on the side walls close to the two ends of the pressure supply piston, and a rubber sleeve B arranged between the two second oil seals, the limiting sealing mechanism comprises a third snap spring clamped on the inner wall of the hydraulic cylinder, and a rubber sleeve A which is in contact sealing with the connecting rod and the hydraulic cylinder on the connecting rod respectively is sleeved with the limiting sealing mechanism.

Has the advantages that:

1. the intelligent sub-control hydraulic brake is adopted, and two sets of independent electric hydraulic pumps are arranged to form a complementary action, so that the normal work of a brake system can not be influenced at all when any one electric hydraulic pump breaks down, a driver has sufficient time to maintain after finding the fault, and the hidden danger of anchoring or traffic accidents is avoided.

2. According to the utility model, each oil way node is provided with a sensor, so that a driver can intuitively master the working state of the whole brake system, and meanwhile, the problem of pressure loss caused by pipeline leakage is avoided by arranging a plurality of one-way valves at specific positions in a pipeline.

3. According to the utility model, each control slave cylinder is also provided with the electromagnetic valve, so that the oil supply of any brake slave cylinder can be independently closed at any time, and the problem of tire burst caused by incapability of cooling the brake drum due to high temperature caused by water sprayer failure is effectively solved.

4. The electric hydraulic pump is not affected by the fact that whether the engine is in a working state or not, the engine is abnormally shut down in time, and the brake cannot lose brake capacity due to lack of power assistance.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the system of the present application.

Fig. 2 is an isometric view of a master cylinder structure.

Fig. 3 is a front view of fig. 2.

Fig. 4 is a sectional view (in a braking state) taken along a sectional line a-a in fig. 3.

Fig. 5 is the non-braking state of fig. 4.

Fig. 6 is an enlarged view of the structure of region B in fig. 4.

Fig. 7 is a plan view of the master cylinder.

Fig. 8 is a sectional view taken along the section symbol C-C in fig. 7.

Fig. 9 is an isometric view of a control cylinder structure.

Fig. 10 is a plan view of the control cylinder.

Fig. 11 is a sectional view taken along a sectional symbol D-D in fig. 10.

Fig. 12 is an axial full sectional view of the high-pressure reserve tank in a reserve state.

Fig. 13 is an axial full sectional view of the high-pressure reserve tank in the oil supplying state.

Fig. 14 is an enlarged view of the structure of region E in fig. 13.

FIG. 15 is an isometric view of the mounting of the master cylinder and the control slave cylinder.

Fig. 16 is a structural perspective view of the high-pressure reserve tank.

Fig. 17 is an isometric view of the inverted visual structure of fig. 16.

In the figure: 1-a control unit; 2-a hydraulic oil tank; 3-an electric hydraulic pump; 4-a first one-way valve; 5-high pressure oil storage barrel; 6-a second one-way valve; 7-brake master cylinder; 8-controlling the branch pump; 9-brake cylinder;

11-oil mass sensor; 12-a first oil pressure sensor; 13-a second oil pressure sensor; 14-a displacement sensor; 15-a fourth oil pressure sensor; 16-temperature sensor.

51-oil drum housing; 52-end cap; 521-disassembling the blind hole; 53-high pressure spring; 54-a gland; 55-a connecting rod; 56-pressure supply piston; 561-second oil seal; 562-rubber sleeve B; 57-hydraulic cylinder; 58-rubber sleeve A; 59-third circlip.

71-master cylinder housing; 711-a master pump oil inlet; 712-master pump oil outlet; 713-a first chamber; 714-oil return port; 715-pressure equalizing holes; 72-a scaffold; 73-a pulling arm; 74-master cylinder spool; 741-T oil gallery; 742-telescoping tubing; 743-limit step; 75-a return spring; 76-a first circlip; 77-a second clamp spring; 78-first oil seal.

81-wheel cylinder shell; 82-branch pump oil outlet; 83-third oil pressure sensor; 84-a solenoid valve; 85-cylinder piston; 86-branch pump oil inlet; 87-avoid blind holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

the utility model provides an intelligent sub-control hydraulic brake system, which comprises a control unit 1, a plurality of independent hydraulic execution units and a sensing unit, wherein each hydraulic execution unit comprises a hydraulic oil tank 2, an electric hydraulic pump 3, a first one-way valve 4, a high-pressure oil storage barrel 5, a second one-way valve 6 and a master brake pump 7, which are sequentially communicated in a sealing manner through a hydraulic oil pipe, the master brake pump 7 is connected with at least one control sub-pump 8, and any control sub-pump 8 is connected with a brake sub-pump 9 for braking;

the sensing unit comprises an oil quantity sensor 11 arranged in the hydraulic oil tank 2, a first oil pressure sensor 12 used for detecting the oil pressure at the outlet of the electric hydraulic pump 3, a second oil pressure sensor 13 used for detecting the oil supply pressure of the high-pressure oil storage barrel 5, a third oil pressure sensor 83 used for detecting the oil pressure at the outlet of the control cylinder 8 or a fourth oil pressure sensor 15 used for detecting the oil pressure of the brake cylinder 9; the sensing unit further comprises a first oil pressure sensor 12 for detecting the oil pressure at the outlet of the electric hydraulic pump 3 and a temperature sensor 16 for detecting the working temperature of the brake cylinder 9.

The control unit 1 is electrically connected with the sensing unit and the hydraulic actuating unit.

The working principle is as follows:

the control unit 1 can be implemented by using an existing integrated chip, and the working logic is as follows: the method comprises the steps of collecting signal information of each sensor of the sensing unit in real time, sending a corresponding instruction according to the comparison between an actually collected information value and a preset threshold value of the control unit 1, and enabling the control logic of the control unit 1 to be consistent with the existing closed-loop control.

As shown in fig. 1, in this embodiment, the same master brake pump 7 is connected to four control slave cylinders 8, and each control slave cylinder 8 is hermetically communicated with a brake slave cylinder 9; when the brake pedal is in a natural state in a non-braking state, the control unit 1 sends a control instruction to the electric hydraulic pump 3, and the electric hydraulic pump 3 pumps the hydraulic oil in the hydraulic oil tank 2 into the high-pressure oil storage tank 5 and sends the hydraulic oil into the master brake pump 7. After a driver steps on a brake pedal, the master brake pump 7 is started, high-pressure hydraulic oil in the high-pressure oil storage barrel 5 enters the control branch pumps 8, and each brake branch pump 9 is finally driven to brake the wheel. The embodiment adopts two hydraulic execution units to control four wheels, and is suitable for vehicles with ordinary four-wheel braking. If the brake cylinder is applied to a multi-wheel vehicle, the brake cylinders 9 are required to be additionally arranged according to the number of the braking wheels. As shown in fig. 1, in the embodiment, the two electric hydraulic pumps 3 of the hydraulic execution units are arranged in parallel, the normal operation of the braking system is not affected by the failure of any one of the electric hydraulic pumps 3, and the other electric hydraulic pump which normally operates can still provide high-pressure hydraulic oil to the master cylinder 7 to maintain the normal operation of the braking system. The first one-way valve 4 is used for avoiding the pressure loss of the hydraulic oil in the high-pressure oil storage barrel 5 when the electric hydraulic pump 3 fails or leaks; the second check valve 6 is used for preventing hydraulic oil in the master cylinder 7 from losing pressure due to pipeline leakage before the hydraulic oil enters the oil inlet of the master cylinder 7.

Aiming at the sensing unit, the braking pressure required by different vehicle types is set by manual self-definition, and when the oil pressure value of the second oil pressure sensor 13 collected by the control unit 1 is lower than the preset value, a working instruction is sent to the electric hydraulic pump 3 until the actual pressure value reaches the preset value. The temperature sensor 16 arranged on the brake cylinder 9 is used for carrying out high-temperature early warning on the brake working temperature, and avoids high temperature of a hub caused by high brake temperature, so that serious accidents such as tire burst and even nature can be caused. If the actual temperature that a certain temperature sensor 16 gathered is higher than the preset temperature value of the control unit 1, then the driver can close the corresponding brake slave cylinder 9, or inspect the water drenching device, thereby effectively putting an end to the traffic accident that the high temperature leads to brake failure, and greatly improving the driving safety guarantee. It should be noted that fig. 1 of the present embodiment is only used for illustrating the present embodiment, and shows the relationship between the connections, and does not represent that hydraulic oil pipes must be used for connecting two components connected to each other, and the two components can also be directly connected as the actual installation conditions allow.

Example 2:

in this embodiment, in addition to embodiment 1, referring to fig. 1 of the specification, in order to avoid the problem that the high-pressure oil storage tank 5 is exploded due to the fact that the electric hydraulic pump 3 continues to supply pressure after reaching the preset pressure caused by the failure of the second oil pressure sensor 13, this embodiment is particularly improved as follows, and the sensing unit further includes a displacement sensor 14 installed at the center of the bottom of the high-pressure oil storage tank 5. Displacement sensor 14's effect is the effect of an insurance for the inside stroke of real-time supervision high pressure oil storage bucket 5, because of unknown reason can't be when presetting the pressure value and stopping the pressure supply work of electric hydraulic pump 3, along with 5 pressure of high pressure oil storage bucket increases gradually, when arriving the warning stroke that displacement sensor 14 can monitor, displacement sensor 14 will send signal to control unit 1, thereby stop the work of supplying power for electric hydraulic pump 3 immediately through control unit 1, avoid the knock occurence of failure. It should be noted that, in order to avoid the problem of cylinder explosion due to the out-of-control system caused by the failure of the control unit 1, the displacement sensor may be replaced by a mechanical travel switch, and when the electric hydraulic pump is in an out-of-control state and continuously supplies pressure, the pressure of the high-pressure oil storage tank gradually increases, and when the electric hydraulic pump reaches an alarm stroke, the gland will collide with the travel switch to trigger the switch to forcibly disconnect the power supply of the electric hydraulic pump, thereby playing a role in protection.

Example 3:

in this embodiment, on the basis of any one of the above embodiments, in order to be compatible with existing different types of vehicle brake refitting, the present embodiment is optimized and improved for a master cylinder 7, specifically, as shown in fig. 2 to 8 in the specification, the master cylinder 7 includes a master cylinder housing 71, a first chamber 713 for slidably and hermetically mounting a master cylinder valve spool 74 is provided in the master cylinder housing 71, an oil return port 714 having an inner diameter smaller than that of the first chamber 713 is integrally provided at one end of the master cylinder housing 71, a limiting mechanism is clamped on an inner wall of the other end of the master cylinder housing 71, and the limiting mechanism and the oil return port 714 limit the master cylinder valve spool 74 to axially slide in the first chamber 713; the oil pump comprises a master pump shell 71 and is characterized in that at least one pair of master pump oil inlets 711 and master pump oil outlets 712 are arranged on the outer wall of the master pump shell 71, a T-shaped oil passage 741 used for respectively communicating the master pump oil inlets 711 with an oil return port 714 or communicating the master pump oil outlets 712 with the oil return port 714 through position change is arranged on the master pump spool 74, the T-shaped oil passage 741 is in sliding and sealing communication with the oil return port 714 through a telescopic oil pipe 742 integrally formed with the master pump spool 74, and a return spring 75 used for pushing the master pump spool 74 to reset is sleeved on the outer circumferential side wall of the telescopic oil pipe 742; a bracket 72 is mounted on the master cylinder housing 71, and a pull arm 73 for controlling the extension and contraction of the master cylinder valve core 74 is hinged on the bracket 72. And a pressure equalizing hole 715 is formed in the side wall of the master cylinder shell 71, which is close to the return spring 75. When the master cylinder valve core 74 moves up and down, air is discharged or sucked through the pressure equalizing hole 715 to achieve the effect of balancing air pressure, so that the situation that the air at the lower part of the master cylinder valve core 74 cannot be discharged to increase the stepping resistance of a driver is avoided. The pull arm 73 is the only component for controlling the master cylinder valve core 74, and can establish a driving relation with the existing vehicle brake pedal through a pull wire connection mode, a connecting rod hinge mode and the like, so that the master cylinder valve core 74 can be controlled by stepping on the original brake pedal of the vehicle. Of course, the linear braking relationship can also be established by using a telex control method, i.e., converting the stepping formation amount of the brake pedal of the vehicle into the movement formation amount of the master cylinder spool 74 in a wired or wireless manner. The telescopic oil pipe 742 is provided with a limiting step 743 for limiting the downward movement of the master cylinder valve core 74. When a driver steps on a brake pedal and controls the master cylinder valve core 74 to move downwards through the pull arm, the maximum stroke is in a state that the limiting step 743 is abutted and contacted with the master cylinder shell 71, at the moment, the T-shaped oil channel 741 is respectively communicated with the master cylinder oil inlet 711, the T-shaped oil channel 741 and the oil return port 714, and high-pressure hydraulic oil from the high-pressure oil storage barrel 5 pushes the brake cylinder 9 to perform a braking action, so that quick braking is realized.

In order to ensure a linear relationship between the displacement position of the master cylinder spool 74 and the brake, it is preferable that an annular oil sump is further provided on the circumferential side wall of the master cylinder spool 74 near the T-shaped oil passage 741. Because the number of the oil inlet holes of the T-shaped oil passage 741 is two, if the master pump spool 74 axially rotates, the closed communication between the T-shaped oil passage 741 and the master pump oil inlet 711 or the master pump oil outlet 712 is not affected no matter how many degrees the master pump spool 74 deflects under the action of the annular oil collecting groove, so that the working reliability of the master pump spool 74 is improved.

In order to facilitate the disassembly and assembly, and simultaneously take into account the technical effects of sliding seal, preferably, the limiting mechanism comprises a first snap spring 76 and a second snap spring 77 which are detachably and fixedly clamped on the inner wall of the master cylinder shell 71, and a first oil seal 78 arranged between the first snap spring 76 and the second snap spring 77. The first snap spring 76 and the second snap spring 77 are embedded in the inner wall of the master cylinder housing 71 to realize axial fixation, and always limit the first oil seal 78 at a fixed position, and the first oil seal 78 is in sliding contact with the master cylinder valve core 74 and the master cylinder housing 71 respectively to realize sealing.

Example 4:

in this embodiment, on the basis of embodiment 3, further referring to fig. 9-11 of the specification, in order to implement independent control of braking of each wheel, in this embodiment, the control wheel cylinder 8 includes a wheel cylinder housing 81, a wheel cylinder oil inlet 86 provided at the bottom of the wheel cylinder housing 81 and a wheel cylinder piston 85 slidably and hermetically provided in the wheel cylinder housing 81, a wheel cylinder oil outlet 82 provided at the upper end of the wheel cylinder housing 81, and an electromagnetic valve 84 for controlling on/off of an oil path and a third oil pressure sensor 83 for detecting oil pressure of the wheel cylinder oil outlet 82 are detachably and hermetically communicated with the wheel cylinder oil outlet 82; an avoidance blind hole 87 for avoiding the electromagnetic valve core is formed in one side, close to the electromagnetic valve 84, of the wheel cylinder piston 85, so that the valve core of the electromagnetic valve 84 is prevented from interfering with the wheel cylinder piston 85. When the control slave cylinder 8 is in normal operation, the electromagnetic valve 84 is always in a conducting state, when the oil pressure detected by the third oil pressure sensor 83 located at the slave cylinder oil outlet 82 has obvious pressure loss and represents that the corresponding brake has obvious brake failure fault, in order to avoid leakage of hydraulic oil, a driver manually gives an instruction to close the corresponding electromagnetic valve 84 through the control unit 1, so that the slave cylinder 8 is controlled to be closed independently, the problem of hydraulic pressure loss of the whole brake system due to local hydraulic oil leakage is avoided, and the brake of other wheels is not influenced. Compared with the prior art, the improved structure can still keep all the braking capacities of all the wheels except the failed wheel under the condition of hydraulic oil leakage, greatly improves the reliability and the fault resistance of the brake, and reduces brake failure traffic accidents caused by brake oil leakage.

Example 5:

in order to realize the effect of engine stall and always provide braking force in case of emergency, the present embodiment optimizes the high-pressure oil storage barrel 5 based on any one of the above embodiments, and as shown in the attached drawings 12-14, the high-pressure oil storage barrel 5 comprises an oil barrel shell 51, one end of the oil barrel shell 51 is detachably and hermetically provided with an end cover 52, the other end is coaxially provided with a hydraulic cylinder 57, a pressure supply piston 56 is hermetically and slidably arranged in the hydraulic cylinder 57, the pressure supply piston 56 and a gland 54 axially and reciprocally slidably arranged in the oil drum shell 51 are connected through a connecting rod 55, a high-pressure spring 53 is arranged between the gland 54 and the end cover 52, one end of the hydraulic cylinder 57 close to the end cover 52 is provided with a limit sealing mechanism, the other end of the hydraulic cylinder 57 is respectively communicated with the outlet end of the first check valve 4 and the inlet end of the second check valve. When the brake pedal is not stepped on, the high-pressure oil storage barrel 5 is in a pressure accumulation state, the electric hydraulic pump 3 continuously pumps the hydraulic oil in the hydraulic oil tank 2 into the hydraulic cylinder 57, the hydraulic oil overcomes the elasticity of the high-pressure spring 53 and sequentially pushes the connecting rod 55 and the gland 54 through the pressure supply piston 56 to compress the high-pressure spring 53, meanwhile, the hydraulic oil entering the hydraulic cylinder 57 is more and more along with the sliding of the pressure supply piston 56 towards one side of the high-pressure spring 53, when the pressure of the hydraulic oil in the hydraulic cylinder 57 reaches a preset value, the electric hydraulic pump 3 stops supplying the oil, the pressure value of the hydraulic oil is always kept in a preset value state under the action of the high-pressure spring 53, and the pressure accumulation process is completed. When the brake pedal is stepped on and the master cylinder 7 is turned on, the high-pressure hydraulic oil in the hydraulic cylinder 57 instantly supplies oil under the action of the high-pressure spring 53, so that the braking action is realized. It should be noted that, in order to further save space and reduce the occupied space of the equipment, and at the same time, in order to effectively prevent the pressure supply piston 56 from tilting during the reciprocating motion of oil supply, the inner wall of the gland 54 is slidably fitted over the outer wall of the hydraulic cylinder 57.

In order to enhance the reliability of the pressure supply piston 56, preferably, the pressure supply piston 56 is provided with second oil seals 561 on the side walls near the two ends, and a rubber sleeve B562 arranged between the two second oil seals 561, and the limiting sealing mechanism includes a third clamp spring 59 clamped on the inner wall of the hydraulic cylinder 57, and a rubber sleeve a58 sleeved on the connecting rod 55 and respectively in contact sealing with the connecting rod 55 and the hydraulic cylinder 57.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Intelligent sub-control hydraulic brake system comprises a control unit (1), a plurality of independent hydraulic execution units and a sensing unit, and is characterized in that:

the hydraulic execution unit comprises a hydraulic oil tank (2), an electric hydraulic pump (3), a first one-way valve (4), a high-pressure oil storage barrel (5), a second one-way valve (6) and a master brake pump (7) which are sequentially communicated in a closed mode through a hydraulic oil pipe, the master brake pump (7) is connected with at least one control slave cylinder (8), and any control slave cylinder (8) is connected with a master brake pump (9) for braking;

the sensing unit comprises an oil quantity sensor (11) arranged in the hydraulic oil tank (2), a second oil pressure sensor (13) used for detecting the oil supply pressure of the high-pressure oil storage barrel (5), a third oil pressure sensor (83) used for detecting the oil pressure of an outlet of the control cylinder (8) or a fourth oil pressure sensor (15) used for detecting the oil pressure of the brake cylinder (9);

the control unit (1) is electrically connected with the sensing unit and the hydraulic execution unit.

2. The intelligent sub-control hydraulic brake system according to claim 1, characterized in that: the sensing unit also comprises a displacement sensor (14) which is arranged in the high-pressure oil storage barrel (5) and is positioned at the center of the bottom.

3. The intelligent sub-control hydraulic brake system according to claim 1 or 2, characterized in that: the brake master cylinder (7) comprises a master cylinder shell (71), a first chamber (713) used for sliding and sealing and mounting a master cylinder valve core (74) is arranged in the master cylinder shell (71), an oil return port (714) with the inner diameter smaller than that of the first chamber (713) is integrally arranged at one end of the master cylinder shell (71), a limiting mechanism is clamped on the inner wall of the other end of the master cylinder shell (71), and the master cylinder valve core (74) is limited by the limiting mechanism and the oil return port (714) to axially slide in the first chamber (713); the oil pump is characterized in that at least one pair of a master pump oil inlet (711) and a master pump oil outlet (712) are arranged on the outer wall of the master pump shell (71), a T-shaped oil passage (741) used for respectively communicating the master pump oil inlet (711) with the oil return port (714) or communicating the master pump oil outlet (712) with the oil return port (714) through position change is arranged on the master pump valve spool (74), the T-shaped oil passage (741) is in sliding and sealing communication with the oil return port (714) through a telescopic oil pipe (742) integrally formed with the master pump valve spool (74), and a reset spring (75) used for pushing the master pump valve spool (74) to reset is sleeved on the outer circumferential side wall of the telescopic oil pipe (742); a bracket (72) is installed on the master cylinder shell (71), and a pull arm (73) used for controlling the extension and retraction of the master cylinder valve core (74) is hinged on the bracket (72); and the telescopic oil pipe (742) is provided with a limiting step (743) for limiting the downward movement of the master cylinder valve core (74).

4. The intelligent sub-control hydraulic brake system according to claim 3, characterized in that: an annular oil collecting groove is further formed in the circumferential side wall of the master cylinder valve core (74) close to the T-shaped oil passage (741).

5. The intelligent sub-control hydraulic brake system according to claim 4, wherein: stop gear is in including dismantling fixed joint first jump ring (76) and second jump ring (77) on master cylinder casing (71) inner wall, and set up first oil blanket (78) between first jump ring (76) and second jump ring (77).

6. The intelligent sub-control hydraulic brake system according to claim 1 or 2, characterized in that: the control branch pump (8) comprises a branch pump shell (81), a branch pump oil inlet (86) and a branch pump piston (85) are arranged at the bottom of the branch pump shell (81) in a sliding and sealing mode, the branch pump piston is arranged in the branch pump shell (81), a branch pump oil outlet (82) is arranged at the upper end of the branch pump shell (81), and an electromagnetic valve (84) used for controlling the on-off of an oil way and a third oil pressure sensor (83) used for detecting the oil pressure of the branch pump oil outlet (82) are detachably and hermetically connected to the branch pump oil outlet (82); and an avoidance blind hole (87) for avoiding the electromagnetic valve core is formed in one side of the wheel cylinder piston (85) close to the electromagnetic valve (84).

7. The intelligent sub-control hydraulic brake system according to claim 1 or 2, characterized in that: high-pressure oil storage bucket (5) include oil drum casing (51), airtight being provided with end cover (52) can be dismantled to oil drum casing (51) one end, and other end coaxial arrangement has pneumatic cylinder (57), airtight sliding is provided with and supplies pressure piston (56) in pneumatic cylinder (57), it sets up with axial reciprocating sliding through connecting rod (55) to supply pressure piston (56) gland (54) in oil drum casing (51), gland (54) with be provided with high-pressure spring (53) between end cover (52), pneumatic cylinder (57) are close to end cover (52) one end and are provided with spacing sealing mechanism, pneumatic cylinder (57) other end respectively with the exit end of first check valve (4) and the entrance point intercommunication of second check valve.

8. The intelligent sub-control hydraulic brake system according to claim 7, wherein: supply to press piston (56) and all be provided with second oil blanket (561) on being close to both ends head lateral wall to and set up gum cover B (562) between two second oil blankets (561), spacing sealing mechanism includes third jump ring (59) of joint on pneumatic cylinder (57) inner wall, and the cover is established respectively on connecting rod (55) with connecting rod (55) and pneumatic cylinder (57) between gum cover A (58) of contact seal.

9. The intelligent sub-control hydraulic brake system according to claim 1, characterized in that: the sensing unit further comprises a temperature sensor (16) for detecting the working temperature of the wheel cylinder (9).

10. The intelligent sub-control hydraulic brake system according to claim 3, characterized in that: and a pressure equalizing hole (715) is formed in the side wall of the master cylinder shell (71) close to the return spring (75).