CN219790135U - Hydraulic booster brake pump with braking force feedback function - Google Patents
Hydraulic booster brake pump with braking force feedback function Download PDFInfo
- Publication number
- CN219790135U CN219790135U CN202320510767.3U CN202320510767U CN219790135U CN 219790135 U CN219790135 U CN 219790135U CN 202320510767 U CN202320510767 U CN 202320510767U CN 219790135 U CN219790135 U CN 219790135U
- Authority
- CN
- China
- Prior art keywords
- plunger
- cavity
- force feedback
- oil
- composite
- 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.)
- Active
Links
- 239000003921 oil Substances 0.000 claims abstract description 161
- 239000002131 composite material Substances 0.000 claims abstract description 106
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 54
- 238000013016 damping Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 229920002148 Gellan gum Polymers 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 description 21
- 238000010586 diagram Methods 0.000 description 16
- 150000001875 compounds Chemical class 0.000 description 9
- 238000003825 pressing Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
A hydraulic booster brake pump with braking force feedback comprises a brake pump housing combination and a composite plunger combination, wherein the composite plunger combination is arranged in a cavity of the brake pump housing combination in a sliding manner, the cavity of the brake pump housing combination is divided into an oil inlet cavity, an oil return cavity and a booster cavity, and the pressure difference between the oil inlet cavity and the oil return cavity is transmitted to a brake after being increased by the booster cavity to brake a tractor or other vehicles; the composite plunger combination comprises a composite plunger and a force feedback control plunger, wherein the force feedback control plunger is arranged in the composite plunger in a sliding way, and the sliding stroke of the force feedback control plunger is used for controlling the magnitude of hydraulic oil flow damping between an oil inlet cavity and an oil return cavity or switching off oil path connection between the two cavities; the brake pump can control the stroke of the feedback control plunger through the feedback force of the force feedback control plunger, so as to realize the deceleration braking of the tractor or other motor vehicles, and can directly move the feedback control plunger in place, so as to realize the braking of the tractor or other vehicles in emergency.
Description
Technical Field
The utility model relates to the technical field of power-assisted brake pumps for tractors or other motor vehicles, in particular to a hydraulic booster brake pump with braking force feedback.
Background
The existing hydraulic booster brake pump for the tractor or other motor vehicles does not have a force feedback function, and when the hydraulic booster brake pump is braked, after a driver presses a brake pedal, the hydraulic system drives the brake pump to work, and the hydraulic booster brake pump directly enters a full-pressure braking state, namely an emergency braking state, and the brake locks wheels to stop the tractor or other motor vehicles from running; in the braking of a tractor or other motor vehicle, however, most of the situations are that the running speed of the tractor or other vehicle is hoped to be reduced through braking, rather than directly entering emergency braking, and obviously, the hydraulic power-assisted braking pump of the existing tractor or other motor vehicle cannot meet the requirement; when the existing hydraulic power-assisted brake pump is used for braking a tractor or other vehicles in a decelerating way, the brake pedal is repeatedly stepped on, so that the aim of locking wheels by the brake and simultaneously reducing the speed is fulfilled.
Disclosure of Invention
In order to overcome the defects in the background art, the utility model discloses a hydraulic pressurizing brake pump with braking force feedback, which comprises a brake pump housing combination and a composite plunger combination, wherein the composite plunger combination is arranged in a cavity of the brake pump housing combination in a sliding manner, and the cavity of the brake pump housing combination is divided into an oil inlet cavity, an oil return cavity and a pressurizing cavity; the composite plunger combination comprises a composite plunger and a force feedback control plunger, wherein the force feedback control plunger is arranged in the composite plunger in a sliding manner, and controls the magnitude of hydraulic oil flow damping between an oil inlet cavity and an oil return cavity or shuts off oil path connection between the oil inlet cavity and the oil return cavity; when the speed-reducing braking is carried out, a driver controls the sliding stroke of the force feedback control plunger in the composite plunger by controlling the stroke of the brake pedal, so that the hydraulic oil flow damping between the oil inlet cavity and the oil return cavity is controlled, the pressure difference is generated between the oil inlet cavity and the oil return cavity, the composite plunger is driven to move in a combined way by the pressure difference, the pressurizing cavity generates increased pressure, and the brake is driven to brake the wheels, so that the wheels are prevented from being locked; when the speed-reducing braking is carried out, the pressure of the pressurizing cavity is fed back to the force feedback control plunger, so that a driver can feel the braking force, and further the stroke of the brake pedal can be accurately controlled; when emergency braking is carried out, a driver steps on the brake pedal, so that hydraulic oil between the oil inlet cavity and the oil return cavity is completely shut off, the pressure difference between the oil inlet cavity and the oil return cavity reaches the maximum (the pressure of the oil return cavity is zero), meanwhile, the diameter difference between the large plunger and the small plunger of the composite plunger is utilized to increase the pressure of the hydraulic oil in the pressurizing cavity, the hydraulic oil enters a full-pressure pressurizing braking state, and the brake locks the wheels, so that the purpose of emergency braking is achieved.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: a hydraulic booster brake pump with braking force feedback comprises a brake pump housing combination and a composite plunger combination, wherein the composite plunger combination is arranged in a cavity of the brake pump housing combination in a sliding manner; the brake pump shell comprises a shell, and a front end cover and a rear end cover which are fixedly arranged at two ends of the shell, or the front end cover and the shell are welded to form an integrated structure, or the front end cover and the shell are cast integrally and then machined, wherein a rear end cover oil cavity is arranged at the inner side of the rear end cover; the composite plunger combination comprises a composite plunger and a force feedback control plunger, the composite plunger is provided with a large plunger and a small plunger, the large plunger divides a cavity of the brake pump housing combination into an oil inlet cavity and an oil return cavity, and the small plunger extends into the oil cavity of the rear end cover to form a pressurizing cavity; the middle of the composite plunger is provided with a step hole, the force feedback control plunger is arranged in the step hole of the composite plunger in a sliding way, and the magnitude of hydraulic oil flow damping between the oil inlet cavity and the oil return cavity is controlled or the oil path connection between the oil inlet cavity and the oil return cavity is closed; when the speed-reducing braking is carried out, a driver controls the sliding stroke of the force feedback control plunger in the composite plunger by controlling the stroke of the brake pedal, so that the magnitude of hydraulic oil flow damping between the oil inlet cavity and the oil return cavity is controlled, pressure difference is generated between the oil inlet cavity and the oil return cavity, the pressure difference drives the composite plunger to move in a combined way, the pressurizing cavity generates increased pressure, hydraulic oil in the pressurizing cavity enters a brake, and the brake is driven to brake wheels, and meanwhile, the wheels are prevented from being locked; when the speed-reducing braking is carried out, the pressure of the pressurizing cavity is fed back to the force feedback control plunger, so that a driver can feel the magnitude of the braking feedback force, further the stroke of a brake pedal can be accurately controlled, and the purpose of controlling the magnitude of braking force is achieved; when emergency braking is carried out, a driver steps on a brake pedal, a force feedback control plunger is directly moved in place, so that a hydraulic oil connecting channel between an oil inlet cavity and an oil return cavity is completely shut off, the pressure of the oil return cavity is zero, the hydraulic oil pressure of the oil inlet cavity is fully acted on a composite plunger, the diameter difference between a large plunger and a small plunger of the composite plunger is utilized, the hydraulic oil pressure of a pressurizing cavity is increased, the hydraulic oil enters a full-pressure pressurizing braking state, and a brake locks wheels, so that the purpose of emergency braking is achieved.
Further, the composite plunger is correspondingly provided with a composite plunger return spring, and the force feedback control plunger is correspondingly provided with a force feedback control plunger return spring; after the return spring is added, the hydraulic booster brake pump with the braking force feedback can return the composite plunger and the force feedback control plunger more reliably after braking is finished.
Further, a brake oil leakage compensation structure is arranged on the composite plunger combination; when the hydraulic booster brake pump with the braking force feedback works, the hydraulic booster brake pump with the braking force feedback and a brake driven by the hydraulic booster brake pump can have the problem of hydraulic oil leakage, and a brake oil leakage compensation structure is arranged on the composite plunger combination, so that the problem of hydraulic oil leakage possibly existing in compensation is solved, and the problem of insufficient braking force or braking failure caused by hydraulic oil leakage is avoided.
Further, a pressure limiting structure is arranged on the composite plunger; when the hydraulic booster brake pump with braking force feedback works, the hydraulic oil flowing through the pump can be changed from a flowing state to a blocking state, so that pressure impact can be generated in the pump, and particularly when in emergency braking, the pressure impact is more obvious, and the pump Hu Zhidong can be damaged; after the pressure limiting structure is added, the impact pressure is released through the pressure limiting structure, so that the hydraulic booster brake pump or the brake with braking force feedback is prevented from being damaged in emergency braking.
Further, a Gelai ring is arranged between the composite plunger and the force feedback control plunger.
Further, a Gelai ring is arranged between the composite plunger and the shell and between the composite plunger and the rear end cover.
Further, a dustproof sealing ring and a Y-shaped sealing ring are arranged between the force feedback control plunger and the front end cover.
Due to the adoption of the technical scheme, the utility model has the following beneficial effects: the utility model discloses a hydraulic booster brake pump with braking force feedback, which comprises a brake pump housing combination and a composite plunger combination, wherein the composite plunger combination is arranged in a cavity of the brake pump housing combination in a sliding manner, and the cavity of the brake pump housing combination is divided into an oil inlet cavity, an oil return cavity and a booster cavity; the composite plunger combination comprises a composite plunger and a force feedback control plunger, wherein the force feedback control plunger is arranged in the composite plunger in a sliding manner, and controls the magnitude of hydraulic oil flow damping between an oil inlet cavity and an oil return cavity or shuts off oil path connection between the oil inlet cavity and the oil return cavity; when the speed-reducing braking is carried out, a driver controls the sliding stroke of the force feedback control plunger in the composite plunger by controlling the stroke of the brake pedal, so that the hydraulic oil flow damping between the oil inlet cavity and the oil return cavity is controlled, the pressure difference is generated between the oil inlet cavity and the oil return cavity, the composite plunger is driven to move in a combined mode by the pressure difference, the pressurizing cavity generates increased pressure, the pressure of the pressurizing cavity drives the brake to brake the wheels, and meanwhile, the wheels are prevented from being locked; when the speed-reducing braking is carried out, the pressure of the pressurizing cavity is fed back to the force feedback control plunger, so that a driver can feel the braking force, and further the stroke of the brake pedal can be accurately controlled; when emergency braking is carried out, a driver steps on a brake pedal, so that hydraulic oil between an oil inlet cavity and an oil return cavity is completely shut off, the diameter difference between a large plunger and a small plunger is utilized, the hydraulic oil pressure of a pressurizing cavity is increased, the hydraulic oil enters a full-pressure pressurizing braking state, and a brake locks wheels, so that the purpose of emergency braking is achieved; when the hydraulic booster brake pump fed back by the braking force is used for braking in a decelerating manner, a driver does not need to repeatedly click a brake pedal and only needs to control the stroke of the brake pedal according to the feedback force of the brake pedal, so that the decelerating braking operation is more convenient, and the safety of decelerating braking is improved.
Drawings
FIG. 1 is a schematic diagram of a hydraulic booster brake pump with braking force feedback according to the first embodiment;
FIG. 2 is a schematic view of a brake pump housing assembly;
FIG. 3 is a schematic view of a composite plunger assembly according to the first embodiment;
FIG. 4 is a schematic diagram of a composite plunger structure according to the first embodiment;
FIG. 5 is a schematic diagram of a force feedback control plunger according to the first embodiment;
FIG. 6 is a schematic diagram of a hydraulic booster brake pump with braking force feedback according to the second embodiment;
FIG. 7 is a schematic diagram of a composite plunger assembly according to a second embodiment;
FIG. 8 is a schematic diagram of a force feedback control plunger according to a second embodiment;
FIG. 9 is a schematic diagram of a hydraulic booster brake pump with brake force feedback according to the third embodiment;
FIG. 10 is a schematic view of a composite plunger assembly according to the third embodiment;
FIG. 11 is a schematic view of a composite plunger structure according to a third embodiment;
FIG. 12 is a schematic diagram of a force feedback control plunger according to a third embodiment;
FIG. 13 is a schematic diagram of a hydraulic booster brake pump with brake force feedback according to the fourth embodiment;
FIG. 14 is a schematic view of a composite plunger assembly according to a fourth embodiment;
FIG. 15 is a schematic view of a force feedback control plunger according to a fourth embodiment;
FIG. 16 is a schematic diagram of a hydraulic booster brake pump with brake force feedback according to the fifth embodiment;
FIG. 17 is a schematic diagram of a composite plunger assembly according to a fifth embodiment;
FIG. 18 is a schematic diagram of a composite plunger structure according to a fifth embodiment;
FIG. 19 is a schematic diagram of a hydraulic booster brake pump with braking force feedback according to the sixth embodiment;
FIG. 20 is a schematic diagram showing a composite plunger assembly structure according to a sixth embodiment;
FIG. 21 is a schematic view of a composite plunger structure according to a sixth embodiment;
FIG. 22 is a schematic diagram of a hydraulic booster brake pump with brake force feedback according to the seventh embodiment;
FIG. 23 is a schematic view of a composite plunger assembly according to a seventh embodiment;
FIG. 24 is a schematic view of a composite plunger structure according to a seventh embodiment;
fig. 25 is a schematic diagram of a force feedback control plunger according to a seventh embodiment.
In the figure: 1. a brake pump housing assembly; 1.1, a shell; 1.1.1, an oil inlet; 1.1.2, an oil return port; 1.2, a front end cover; 1.2.1, a front end cover through hole; 1.3, a rear end cover; 1.3.1, a rear end cover oil cavity; 1.3.2, brake oil outlet; 2. a composite plunger combination; 2.1, a composite plunger; 2.1.1, large plungers; 2.1.1.1, the oil hole of pressure limiting; 2.1.2, small plungers; 2.1.2.1, a composite plunger oil return hole; 2.1.2.2, oil supplementing and pressure releasing holes; 2.1.3 plunger head; 2.1.3.1, plunger head oil inlet; 2.2, force feedback control plunger; 2.2.1, controlling a plunger ring groove; 2.2.2, controlling the plunger to prevent the ring from falling off; 2.2.3, oil supplementing one-way valve; 2.2.4, oil supplementing holes; 2.2.5, controlling the counter bore at the end part of the plunger; 2.2.6, throttling cone; 2.2.7, orifice; 2.2.8, annular groove through holes; 2.3, force feedback control plunger return spring; 2.4, a return spring stop sleeve; 2.5, limiting rings; 2.6, a pressure limiting spring; 2.7, a pressure limiting adjusting nut; 2.8, a pressure limiting disc spring; 3. a composite plunger return spring; 4. an oil inlet cavity; 5. an oil return cavity; 6. a pressurizing chamber; 7. an annular orifice; 8. force feedback controls the plunger return spring.
Description of the embodiments
The utility model will be explained in more detail by the following examples, the purpose of which is to protect all technical improvements within the scope of the utility model.
Examples
See fig. 1 of the specification: a hydraulic booster brake pump with braking force feedback comprises a brake pump housing combination 1 and a composite plunger combination 2;
see fig. 2 of the specification: the brake pump shell assembly 1 comprises a shell 1.1, a front end cover 1.2 and a rear end cover 1.3 which are fixedly arranged at two ends of the shell 1.1, or the front end cover 1.2 and the shell 1.1 form an integrated structure through welding, or the front end cover 1.2 and the shell 1.1 are cast integrally and then machined; an oil inlet 1.1.1 and an oil return port 1.1.2 which are communicated with the inner cavity are arranged on the shell 1.1; a front end cover through hole 1.2.1 is arranged in the middle of the front end cover 1.2; the inner side of the rear end cover 1.3 is provided with a rear end cover oil cavity 1.3.1, and the bottom of the rear end cover oil cavity 1.3.1 is provided with a brake oil outlet 1.3.2;
see fig. 3 of the specification: the composite plunger combination 2 comprises a composite plunger 2.1 and a force feedback control plunger 2.2; see fig. 4 of the specification: the composite plunger 2.1 is provided with a large plunger 2.1.1 and a small plunger 2.1.2, the end face of the large plunger 2.1.1 is provided with a plunger head 2.1.3, and a step hole is arranged in the middle of the composite plunger 2.1; four plunger head oil inlet holes 2.1.3.1 communicated with the step holes are uniformly distributed on the plunger head 2.1.3, and four composite plunger oil return holes 2.1.2.1 communicated with the step holes are uniformly distributed on the small plunger head 2.1.2 close to the large plunger head 2.1.1; see fig. 5 of the specification: a control plunger ring groove 2.2.1 is arranged at the right end of the force feedback control plunger 2.2, and a throttling conical surface 2.2.6 is arranged at the left side of the control plunger ring groove 2.2.1; the force feedback control plunger 2.2 is arranged in a step hole of the composite plunger 2.1 in a sliding manner, and in an unoperated state, the plunger head oil inlet hole 2.1.3.1 is communicated with the composite plunger oil return hole 2.1.2.1 through the step hole of the composite plunger 2.1 and the control plunger ring groove 2.2.1; the throttling conical surface 2.2.6 is matched with the step hole of the composite plunger 2.1 to form an annular throttling port 7;
the composite plunger combination 2 is arranged in the cavity of the brake pump housing combination 1 in a sliding manner; the left end of the force feedback control plunger 2.2 extends out of the brake pump housing assembly 1 through the front end cover through hole 1.2.1; in the non-working state, the end face of the plunger head 2.1.3 is abutted against the front end cover 1.2; the large plunger 2.1.1 divides the cavity of the brake pump housing combination 1 into an oil inlet cavity 4 and an oil return cavity 5; the small plunger 2.1.2 extends into the oil cavity 1.3.1 of the rear end cover to form a pressurizing cavity 6; in the initial state, the opening of the annular throttling port 7 is maximum in the initial state, the flow of hydraulic oil is hardly damped, and the pressure between the oil inlet cavity 4 and the oil return cavity 5 is equal;
the oil inlet 1.1.1 is connected with a hydraulic system of a tractor or other motor vehicle through a hydraulic pipeline, the oil return port 1.1.2 is connected with an oil storage tank of the hydraulic system of the tractor or other motor vehicle through a hydraulic pipeline, and the brake oil outlet 1.3.2 is connected with a brake of the tractor or other motor vehicle through a hydraulic pipeline; when the tractor or other motor vehicles are in an unbraked state, hydraulic oil entering the hydraulic booster brake pump with braking force feedback through the oil inlet 1.1.1 firstly enters the oil inlet cavity 4, flows into the oil return cavity 5 through the annular throttle opening 7 and the composite plunger oil return hole 2.1.2.1, and flows back into an oil storage tank of the hydraulic system through the oil return opening 1.1.2; at the moment, the end faces of the left side and the right side of the large plunger piston 2.1.1 have no pressure difference, and the composite plunger piston 2.1 is kept in situ;
when a tractor or other motor vehicles perform deceleration braking, a driver presses a brake pedal by foot, a driving force feedback control plunger 2.2 moves rightwards, a throttling conical surface 2.2.6 gradually enters a small hole of a step hole of a compound plunger 2.1, the opening degree of an annular throttling opening 7 becomes smaller, at the moment, pressure drop is generated when hydraulic oil flows through the annular throttling opening 7, so that pressure difference is generated between an oil inlet cavity 4 and an oil return cavity 5 at the left side and the right side of a large plunger 2.1.1, and the pressure difference pushes the compound plunger 2.1 to move rightwards; when the composite plunger 2.1 moves rightwards, the small plunger 2.1.2 positioned in the oil cavity 1.3.1 of the rear end cover moves rightwards, so that the volume of the pressurizing cavity 6 is reduced, the pressure is increased, the increased pressure is related to the ratio of the effective area of the large plunger 2.1.1 to the effective area of the small plunger 2.1.2, and the pressure difference between the oil inlet cavity 4 and the oil return cavity 5 is amplified; the hydraulic oil in the pressurizing cavity 6 enters the brake under the action of the pressure after rising, and braking is generated; when the deceleration braking is carried out, the pressure of the pressurizing cavity 6 acts on the right end face of the force feedback control plunger 2.2 to form force feedback, so that a driver can feel the magnitude of braking feedback force, and further the driver controls the stroke of a brake pedal according to the magnitude of the feedback force, thereby achieving the purpose of controlling the magnitude of braking force; in the process of braking by deceleration, if the driver needs to shift into emergency braking, the force of stepping on a brake pedal is increased, at the moment, the pressure of a pressurizing cavity 6 is continuously increased due to the small area of a feedback control plunger 2.2, and the pressure of the pressurizing cavity 6 is larger than the pressure difference between an oil inlet cavity 4 and an oil return cavity 5, so that a compound plunger 2.1 can rapidly move leftwards under the pressure action of the pressurizing cavity 6, finally an annular throttle 7 is completely closed, the oil way connection between the oil inlet cavity 4 and the oil return cavity 5 is completely closed, at the moment, the pressure of the oil return cavity 5 is zero, the hydraulic oil pressure of the oil inlet cavity 4 is completely acted on the left end face of a large plunger 2.1.1, and the diameter difference between the large plunger 2.1.1 and a small plunger 2.1.2 is utilized by the compound plunger 2.1, so that the hydraulic oil pressure of the pressurizing cavity 6 is increased, the hydraulic oil in the pressurizing cavity 6 rapidly enters a brake under the pressure action of the full pressure and is locked by the brake, and the purpose of emergency braking is achieved;
when a driver needs to directly enter emergency braking, the driver rapidly presses a brake pedal, drives a feedback control plunger 2.2 to rapidly move rightwards, an annular throttle 7 is rapidly closed, the oil way connection between an oil inlet cavity 4 and an oil return cavity 5 is directly and completely closed, at the moment, the pressure of the oil return cavity 5 is zero, the hydraulic oil pressure of the oil inlet cavity 4 is completely acted on the left end face of a large plunger 2.1.1, the compound plunger 2.1 is pushed to rapidly move rightwards, a small plunger 2.1.2 positioned in a rear end cover oil cavity 1.3.1 rapidly moves rightwards, the volume of a pressurizing cavity 6 is reduced, the pressure is increased, and meanwhile, the pressure of the pressurizing cavity 6 is pressurized by utilizing the diameter difference between the large plunger 2.1.1 and the small plunger 2.2, so that the pressure of the pressurizing cavity 6 enters a full-pressure pressurizing braking state, the hydraulic oil in the pressurizing cavity 6 rapidly enters a brake under the action of the pressurized pressure, and the brake is locked to achieve the aim of emergency braking;
after the braking is finished, the driver releases the brake pedal, hydraulic oil in the brake flows back to the pressurizing cavity 6 under the action of the homing spring, and the hydraulic oil flowing back in the pressurizing cavity 6 drives the composite plunger 2.1 and the force feedback control plunger 2.2 to restore to the original position.
Examples
See figures 6, 7, 8 of the description: in the embodiment, an orifice 2.2.7 is arranged on the left side of a control plunger ring groove 2.2.1 in the force feedback control plunger 2.2, a ring groove through hole 2.2.8 is arranged at the bottom of the control plunger ring groove 2.2.1, and the orifice 2.2.7 is communicated with the ring groove through hole 2.2.8 through an axial hole; in the braking process, the distance of the plunger 2.2 moving rightwards is controlled through controlling force feedback, the throttling area of the throttling hole 2.2.7 is controlled, and then the hydraulic oil flowing damping size between the oil inlet cavity and the oil return cavity is controlled or the oil path connection between the oil inlet cavity and the oil return cavity is closed.
Examples
See fig. 9, 10, 11, 12 of the specification: in the embodiment, a composite plunger return spring 3 and a force feedback control plunger return spring 8 are arranged for driving the reliable return of the composite plunger 2.1 and the force feedback control plunger 2.2 after the hydraulic booster brake pump for braking force feedback works; the composite plunger return spring 3 is arranged between the right end face of the large plunger 2.1.1 and the left end face of the rear end cover 1.3 in a collision manner; the force feedback control plunger return spring 8 is arranged between the right end face of the force feedback control plunger 2.2 and the step face of the step hole of the composite plunger 2.1 in a collision mode;
in addition, in the embodiment, a radial oil supplementing and pressure releasing hole 2.1.2.2 is further formed in the small plunger 2.1.2 of the composite plunger 2.1, and in the non-working state of the hydraulic booster brake pump fed back by braking force, the oil return cavity 5 is communicated with the stepped hole of the composite plunger 2.1 through the oil supplementing and pressure releasing hole 2.1.2.2, so that communication with the booster cavity 6 is realized;
under normal conditions, after the braking is finished, a driver releases a brake pedal, hydraulic oil in a brake flows back to the pressurizing cavity 6 under the action of the homing spring, and the composite plunger 2.1 and the force feedback control plunger 2.2 return to the original positions under the action of the hydraulic oil and the homing spring which flow back in the pressurizing cavity 6; however, when the hydraulic booster brake pump with the feedback of the braking force and the brake driven by the hydraulic booster brake pump have the problem of hydraulic oil leakage, the hydraulic oil flowing back in the booster cavity 6 is insufficient to completely reset the composite plunger 2.1 and the force feedback control plunger 2.2; at the moment, hydraulic oil in the oil return cavity 5 enters a stepped hole of the composite plunger 2.1 (namely enters the pressurizing cavity 6) through the oil supplementing and pressure releasing hole 2.1.2.2, hydraulic pressurizing brake pump for compensating braking force feedback is self, hydraulic oil leakage of a brake driven by the hydraulic pressurizing brake pump is guaranteed, the composite plunger 2.1 and the force feedback control plunger 2.2 are completely reset, and the reliability of braking operation of the hydraulic pressurizing brake pump for braking force feedback is guaranteed;
in summer, when the ambient temperature rises, hydraulic oil in the brake is expanded, residual pressure is generated in the brake by the expanded hydraulic oil, and the piston of the brake caliper is not completely returned due to the residual pressure, so that friction plates of a tractor or other motor vehicles are in a friction state for a long time; when the hydraulic oil in the brake expands, the expanded hydraulic oil enters the pressurizing cavity 6 and then enters the oil return cavity 5 through the oil supplementing and pressure relieving hole 2.1.2.2, so that the residual pressure of the brake is released.
Examples
See fig. 13, 14, 15 of the specification: in the embodiment, the right end of the force feedback control plunger 2.2 is fixedly provided with an oil supplementing one-way valve 2.2.3, the left side of the oil supplementing one-way valve 2.2.3 on the force feedback control plunger 2.2 is provided with an oil supplementing hole 2.2.4, and the control plunger ring groove 2.2.1 is unidirectionally communicated to the right end surface of the force feedback control plunger 2.2 through the oil supplementing hole 2.2.4 and the oil supplementing one-way valve 2.2.3, namely the unidirectional communication between the oil return cavity 5 and the pressurizing cavity 6 is realized when the force feedback control plunger 2.2 is in an unoperated state;
when the hydraulic booster brake pump with the braking force feedback and the brake driven by the hydraulic booster brake pump have the problem of hydraulic oil leakage, the hydraulic oil flowing back in the booster cavity 6 is insufficient to completely reset the composite plunger 2.1 and the force feedback control plunger 2.2; at this time, under the action of the compound plunger return spring 3 and the force feedback control plunger return spring 8, the compound plunger 2.1 and the force feedback control plunger 2.2 have a tendency to move leftwards, and the tendency causes the pressurizing cavity 6 to generate negative pressure, so that the pressure of the oil return cavity 5 is larger than that of the pressurizing cavity 6, the oil supplementing one-way valve 2.2.3 is opened under the action of the pressure difference between the oil return cavity 5 and the pressurizing cavity 6, the hydraulic oil of the oil return cavity 5 enters the pressurizing cavity 6, and the hydraulic pressurizing brake pump for compensating braking force feedback is self, and the hydraulic oil of a brake driven by the hydraulic brake pump leaks.
Examples
See figures 16, 17, 18 of the description: in this embodiment, a pressure limiting structure is provided on the composite plunger assembly 2; the concrete structure is as follows: six through pressure limiting oil holes 2.1.1.1 are uniformly distributed around the axis on the end face of the large plunger 2.1.1 of the composite plunger 2.1; the right end face (oil return cavity 5) of the large plunger 2.1.1 is abutted against a limited pressure ring 2.5, the right side of the limited pressure ring 2.5 is abutted against a limited pressure spring 2.6, the right side of the limited pressure spring 2.6 is abutted against a limited pressure adjusting nut 2.7, and the limited pressure adjusting nut 2.7 is connected with the composite plunger 2.1 through threads arranged on the outer circumference of the small plunger 2.1.2; the adjusting nut 2.7 applies pre-pressing to the pressure limiting spring 2.6;
when the hydraulic booster brake pump with braking force feedback works, particularly when emergency braking is carried out, hydraulic oil flowing through the pump can be quickly changed into a blocking state from a circulating state, so that pressure impact can be generated in the pump body, the pressure of the oil inlet cavity 4 is greatly increased (exceeds the pressure input by a hydraulic system) instantly, and meanwhile, the pressure of the oil inlet cavity 4 is increased through the booster cavity 6, and then the pressure becomes higher, so that the hydraulic booster brake pump with braking force feedback is easily damaged; meanwhile, the brake is easily damaged after the huge pressure of the pressurizing cavity 6 is transmitted to the brake; after the pressure limiting structure is added, when the pressure of the oil inlet cavity 4 rises instantaneously, the pressure is transmitted to the pressure limiting ring 2.5 through the pressure limiting oil hole 2.1.1.1, the pressure limiting ring 2.5 compresses the pressure limiting spring 2.6, so that the pressure limiting ring 2.5 is separated from the right end face of the large plunger 2.1.1, the oil inlet cavity 4 is communicated with the oil return cavity 5 through the pressure limiting oil hole 2.1.1.1, the instantaneous high pressure of the oil inlet cavity 4 is released, the pressure impact during emergency braking is greatly improved, and the problem that a hydraulic booster brake pump and a brake fed back by braking force are damaged due to overhigh pressure during emergency braking is solved; the pressure limiting pressure of the pressure limiting structure of the composite plunger combination 2 is determined by the pre-pressing size applied on the pressure limiting spring 2.6.
Examples
See fig. 19, 20, 21 of the specification: in the embodiment, the pressure limiting disc spring 2.8 is used for replacing the pressure limiting spring 2.6 in the fifth embodiment, and the thread position of the corresponding compound plunger 2.1 meshed with the pressure limiting adjusting nut 2.7 is correspondingly changed; the adjusting nut 2.7 applies pre-pressing to the pressure limiting disc spring 2.8, and the pre-pressing size determines the pressure limiting pressure of the pressure limiting structure;
in addition, in this embodiment, the pressure limiting disc spring 2.8 may also be a slotted disc spring, and the adjusting nut 2.7 applies pre-compression to the slotted disc spring, so that the slotted disc spring works in the linear working area, and the pressure limiting pressure of the pressure limiting structure is determined by the characteristics of the linear working area of the slotted disc spring.
Examples
See fig. 22, 23, 24, 25 of the specification: the embodiment is a hydraulic booster brake pump with perfect structural function and braking force feedback, wherein a composite plunger return spring 3, a force feedback control plunger return spring 8, an oil supplementing one-way valve 2.2.3, an oil supplementing pressure relief hole 2.1.2.2 and a pre-pressed pressure limiting ring 2.5 are arranged in the structure through a pressure limiting spring 2.6;
in this embodiment, the oil replenishing one-way valve 2.2.3 and the oil replenishing pressure relief hole 2.1.2.2 are provided at the same time, which is because: when the hydraulic booster brake pump with braking force feedback and a brake driven by the hydraulic booster brake pump have the problem of hydraulic oil leakage, after braking is finished, in the process that the composite plunger 2.1 and the force feedback control plunger 2.2 return to the original position under the action of hydraulic oil in the booster cavity 6 and the return spring, the return speeds of the composite plunger 2.1 and the force feedback control plunger 2.2 are not guaranteed to be synchronous, the situation that the composite plunger 2.1 is completely returned, but the force feedback control plunger 2.2 is not completely returned exists, at the moment, if only the oil supplementing pressure relief hole 2.1.2.2 is arranged, the oil supplementing pressure relief hole 2.1.2.2 can be blocked by the force feedback control plunger 2.2 which is not completely returned, so that the compensation of leaked hydraulic oil cannot be completed; at this time, if only the oil supplementing one-way valve 2.2.3 is arranged, the compensation of leaked hydraulic oil can be completed, but when residual pressure exists in the brake, the residual pressure of the brake cannot be released because the oil supplementing one-way valve 2.2.3 is of a one-way opening structure; when the oil supplementing one-way valve 2.2.3 and the oil supplementing pressure relief hole 2.1.2.2 are arranged at the same time, the problems can be solved.
The dynamic sealing structure of the hydraulic booster brake pump with braking force feedback is as follows: a Gellan ring is arranged between the sealing compound plunger 2.1 and the force feedback control plunger 2.2; a Gellan ring is arranged between the composite plunger 2.1 and the shell 1.1 and between the composite plunger and the rear end cover 1.3; a dustproof sealing ring and a Y-shaped sealing ring are arranged between the force feedback control plunger 2.2 and the front end cover 1.2.
The utility model is not described in detail in the prior art.
Claims (7)
1. A hydraulic booster brake pump with braking force feedback comprises a brake pump housing assembly (1) and a composite plunger assembly (2), wherein the composite plunger assembly (2) is arranged in a cavity of the brake pump housing assembly (1) in a sliding manner; the method is characterized in that: the brake pump shell assembly (1) comprises a shell (1.1) and front end covers (1.2) and rear end covers (1.3) fixedly arranged at two ends of the shell (1.1), or the front end covers (1.2) and the shell (1.1) are of an integrated structure, wherein a rear end cover oil cavity (1.3.1) is arranged at the inner side of the rear end cover (1.3); the composite plunger combination (2) comprises a composite plunger (2.1) and a force feedback control plunger (2.2), the composite plunger (2.1) is provided with a large plunger (2.1.1) and a small plunger (2.1.2), the large plunger (2.1.1) divides the cavity of the brake pump housing combination (1) into an oil inlet cavity (4) and an oil return cavity (5), and the small plunger (2.1.2) extends into the rear end cover oil cavity (1.3.1) to form a pressurizing cavity (6);
the middle of the composite plunger (2.1) is provided with a step hole, the force feedback control plunger (2.2) is arranged in the step hole of the composite plunger (2.1) in a sliding way, and the hydraulic oil flow damping between the oil inlet cavity (4) and the oil return cavity (5) is controlled or the oil path connection between the oil inlet cavity and the oil return cavity is closed.
2. The hydraulically pressurized brake pump with braking force feedback of claim 1, wherein: the composite plunger (2.1) is correspondingly provided with a composite plunger homing spring (3); the force feedback control plunger (2.2) is correspondingly provided with a force feedback control plunger return spring (8).
3. The hydraulically pressurized brake pump with braking force feedback of claim 1, wherein: the composite plunger combination (2) is provided with a brake oil leakage compensation structure.
4. The hydraulically pressurized brake pump with braking force feedback of claim 1, wherein: the composite plunger (2.1) is provided with a pressure limiting structure.
5. The hydraulically pressurized brake pump with braking force feedback of claim 1, wherein: a Gellan ring is arranged between the composite plunger (2.1) and the force feedback control plunger (2.2).
6. The hydraulically pressurized brake pump with braking force feedback of claim 1, wherein: a Gellan ring is arranged between the composite plunger (2.1) and the shell (1.1) and between the composite plunger and the rear end cover (1.3).
7. The hydraulically pressurized brake pump with braking force feedback of claim 1, wherein: a dustproof sealing ring and a Y-shaped sealing ring are arranged between the force feedback control plunger (2.2) and the front end cover (1.2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320510767.3U CN219790135U (en) | 2023-03-16 | 2023-03-16 | Hydraulic booster brake pump with braking force feedback function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320510767.3U CN219790135U (en) | 2023-03-16 | 2023-03-16 | Hydraulic booster brake pump with braking force feedback function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219790135U true CN219790135U (en) | 2023-10-03 |
Family
ID=88152703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320510767.3U Active CN219790135U (en) | 2023-03-16 | 2023-03-16 | Hydraulic booster brake pump with braking force feedback function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219790135U (en) |
-
2023
- 2023-03-16 CN CN202320510767.3U patent/CN219790135U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3719044A (en) | Hybrid brake booster control valve | |
| EP1591295B1 (en) | Hydraulic drive system and improved control valve assembly therefor | |
| US4075848A (en) | Hydraulic brake booster | |
| US7287969B2 (en) | Rotary fluid pressure device and improved brake assembly for use therewith | |
| JP2002127891A (en) | Brake device | |
| US4419862A (en) | Hydraulic master cylinders | |
| US5061016A (en) | Brake fluid pressure control apparatus | |
| EP3500463B1 (en) | Dual master cylinder brake assembly with quick-fill function | |
| US4161867A (en) | Hydraulic brake booster | |
| US3834277A (en) | Hydraulic servo unit for automotive braking system | |
| EP2663477B1 (en) | Differential master cylinder, braking system comprising the cylinder and method of driving a user device by means of the cylinder | |
| CN219790135U (en) | Hydraulic booster brake pump with braking force feedback function | |
| US9664189B2 (en) | Hydrostatic piston engine having a brake device | |
| US4423598A (en) | Working fluid supply system for a hydraulic power booster and a power steering system | |
| US4014171A (en) | Hydraulic brake booster | |
| US3774736A (en) | Hydraulic controls for transmission with brake priority valve | |
| US4781421A (en) | Actuator for use in an anti-skid system | |
| JP2918225B2 (en) | Two-stage brake valve | |
| CN116476791A (en) | Composite plunger force feedback type hydraulic booster brake pump | |
| US6082831A (en) | Electro-hydraulic brake apply system displacement augmentation | |
| US3937127A (en) | Hydraulic brake booster with shut-off means | |
| US4835967A (en) | Hydraulic booster equipped with emergency accumulator | |
| US6062654A (en) | Brake control valve | |
| US5079990A (en) | Hydraulic pressure booster | |
| CN218703193U (en) | Structure for automatically compensating oil leakage of brake mechanism of brake booster pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |