CN109204273B - Hydraulic main pump and hydraulic braking system - Google Patents
Hydraulic main pump and hydraulic braking system Download PDFInfo
- Publication number
- CN109204273B CN109204273B CN201811341880.3A CN201811341880A CN109204273B CN 109204273 B CN109204273 B CN 109204273B CN 201811341880 A CN201811341880 A CN 201811341880A CN 109204273 B CN109204273 B CN 109204273B
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- pressure regulating
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 103
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 30
- 239000003921 oil Substances 0.000 claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 45
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Details Of Reciprocating Pumps (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to the technical field of braking, in particular to a hydraulic main pump and a hydraulic braking system. The hydraulic main pump provided by the invention comprises a valve body, a pressing mechanism and a pressure regulating mechanism; the valve body is provided with a liquid storage cavity and a pressure regulating cavity, and the liquid storage cavity is communicated with the pressure regulating cavity through an exhaust hole; the liquid storage cavity is provided with a first oil outlet, and the pressure regulating cavity is provided with a second oil outlet; the pressing mechanism is configured to apply pressure to the hydraulic oil in the reservoir. The pressure regulating mechanism is arranged in the pressure regulating cavity and is configured to regulate the output size or time of hydraulic oil in the pressure regulating cavity. And the pressure is applied to the hydraulic oil in the liquid storage cavity through the pressure applying mechanism, one part of the hydraulic oil is output through the first oil outlet, the other part of the hydraulic oil flows into the pressure regulating cavity, and the hydraulic oil is output from the second oil outlet through the regulation of the pressure regulating mechanism.
Description
Technical Field
The invention relates to the technical field of braking machinery, in particular to a hydraulic main pump and a hydraulic braking system.
Background
The importance of a brake system, which is one of the driving safety guarantee systems of vehicles, attracts great attention. A number of motorcycles now employ a linkage brake system. However, if the front wheels and the rear wheels are braked simultaneously to generate the same braking force, the front wheels and the rear wheels cannot be regulated, so that locking of the front wheels can be caused in advance in the braking process of the low-adhesion road surface; or the conditions of unbalanced braking force, insufficient braking force and the like of the whole vehicle occur, and the safety performance of braking is seriously affected.
Disclosure of Invention
In order to solve the above problems in the prior art, an object of the present invention is to provide a hydraulic main pump.
Another object of the present invention is to provide a hydraulic brake system having the above hydraulic main pump.
Embodiments of the present invention are implemented as follows:
The hydraulic main pump comprises a valve body, wherein the valve body is provided with a liquid storage cavity and a pressure regulating cavity, and the liquid storage cavity is communicated with the pressure regulating cavity through an exhaust hole; the liquid storage cavity is provided with a first oil outlet, and the pressure regulating cavity is provided with a second oil outlet; a pressure applying mechanism disposed within the reservoir, the pressure applying mechanism configured to apply pressure to hydraulic oil within the reservoir; the pressure regulating mechanism is arranged in the pressure regulating cavity and is configured to regulate the output size or time of hydraulic oil in the pressure regulating cavity.
In one embodiment of the invention:
The pressure applying mechanism comprises a main pump piston part and a pressure applying part, wherein the main pump piston part is in sliding fit with the liquid storage cavity and pushes the main pump piston part to be used for changing the pressure of hydraulic oil in the liquid storage cavity; the pressing portion is configured to apply pressure to the main pump piston portion so that the main pump piston portion slides toward the inside of the reservoir chamber in the axial direction.
In one embodiment of the invention:
the main pump piston part comprises a piston head, a piston rod, an annular baffle, a first sealing piece and a piston return spring; the piston head and the annular baffle are arranged at two ends of the piston rod, and the first sealing piece is arranged at the end face of the piston head far away from the piston rod; one end of the piston return spring is connected with the first sealing piece, and the other end of the piston return spring is abutted to the liquid storage cavity.
In one embodiment of the invention:
The inner wall of the liquid storage cavity is provided with an oil through hole, and when the piston return spring is in an initial state, the oil through hole is arranged on one side of the first sealing element, which is close to the piston return spring.
In one embodiment of the invention:
The pressure regulating mechanism comprises a delay piston piece and a delay spring, and the delay piston piece and the delay spring are arranged in the pressure regulating cavity; the retard spring is configured to cause the retard piston member to have a tendency to move toward the exhaust hole.
In one embodiment of the invention:
The delay piston piece comprises a delay piston head, a delay piston rod, a delay sealing ring and a delay piston return spring; the delay piston head is arranged at one end of the delay piston rod; the delay sealing ring is sleeved on the delay piston rod, a space is reserved between the delay sealing ring and the side wall of the delay piston rod and the side wall of the pressure regulating cavity respectively, and an annular boss is arranged at the end part of the pressure regulating cavity, which is close to the pressure input port; the delay spring is sleeved on the delay piston rod, one end of the delay spring is abutted with the delay sealing ring, and the other end of the delay spring is abutted with the pressure regulating cavity so as to enable the delay sealing ring to be abutted on the annular boss; the delay piston return spring is arranged at one end of the delay piston rod, which is far away from the delay piston head, so that a gap is reserved between the piston head and the delay sealing ring; the spring force of the delay spring is greater than the spring force of the delay piston return spring.
In one embodiment of the invention:
the pressure regulating intracavity is provided with delay spring base, delay piston rod slidable run through delay spring base, delay spring one end butt in delay sealing washer, the other end butt in delay spring base.
In one embodiment of the invention:
The pressure regulating mechanism comprises a proportional piston rod, a proportional piston head, a proportional spring and an annular stop block; a proportional sealing ring is arranged in the pressure regulating cavity close to the pressure output port; the proportional piston rod, the proportional piston head, the proportional spring and the annular stop block are all arranged in the pressure regulating cavity; the proportional piston rod slidably penetrates through the proportional sealing ring, the proportional piston head is arranged at one end of the proportional piston rod, the annular stop block is annularly arranged on the proportional piston rod and coaxial with the proportional piston rod, and the proportional piston head and the annular stop block are arranged at two sides of the proportional sealing ring; the proportional spring is sleeved on the proportional piston rod, one end of the proportional spring is abutted against the annular stop block, and the other end of the proportional spring is abutted against the pressure regulating cavity; when the proportional spring is in an initial state, the annular stop block and the proportional piston head are spaced from the proportional sealing ring; the end part of the proportional piston rod, which is far away from the proportional piston head, is provided with a preset gap with the pressure regulating cavity.
In one embodiment of the invention:
the pressure regulating intracavity is provided with proportion spring base, proportion piston rod slidably runs through proportion spring base, proportion spring one end butt in annular dog, the other end butt in proportion spring base.
A hydraulic brake system comprising any one of the hydraulic main pumps described above.
The embodiment of the invention has the beneficial effects that:
The hydraulic main pump provided by the embodiment of the invention comprises a valve body, wherein the valve body is provided with a liquid storage cavity and a pressure regulating cavity, and the liquid storage cavity is communicated with the pressure regulating cavity through an exhaust hole; the liquid storage cavity is provided with a first oil outlet, and the pressure regulating cavity is provided with a second oil outlet; a pressure applying mechanism disposed within the reservoir, the pressure applying mechanism configured to apply pressure to hydraulic oil within the reservoir; the pressure regulating mechanism is arranged in the pressure regulating cavity and is configured to regulate the output size or time of hydraulic oil in the pressure regulating cavity. In the braking process, pressure is applied to the hydraulic oil in the liquid storage cavity through the pressure applying mechanism, one part of the hydraulic oil is output through the first oil outlet, the other part of the hydraulic oil flows into the pressure regulating cavity, and the hydraulic oil is output from the second oil outlet through the regulation of the pressure regulating mechanism. The hydraulic main pump provided by the invention can change one-position input into two-position hydraulic output, and the two-position output hydraulic is different, so that the problem of overlarge front braking force caused by linkage braking can be effectively avoided, the front braking distribution ratio and the rear braking distribution ratio are more suitable, and the braking is smoother and quicker.
The hydraulic braking system provided by the invention comprises the hydraulic main pump, so that the hydraulic braking system also has the beneficial effects.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following description will briefly explain the drawings that need to be used in the embodiments. It is appreciated that the following drawings depict only certain embodiments of the invention and are not therefore to be considered limiting of its scope. Other figures can be obtained from these figures without inventive effort for the person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a hydraulic main pump according to embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of A-A of FIG. 1;
fig. 3 is a schematic diagram of the overall structure of a hydraulic brake system according to embodiment 2 of the present invention.
Icon: 10-a hydraulic main pump; 100-valve body; 110-a liquid storage cavity; 112-a first oil outlet; 120-pressure regulating cavity; 122-a second oil outlet; 130-exhaust holes; 200-a pressing mechanism; 210-a main pump piston portion; 211-piston heads; 212-a piston rod; 213-annular baffles; 214-a first seal; 215-a second seal; 216-a piston return spring; 300-a pressure regulating mechanism; 310-delay piston member; 311-delay piston head; 312-delaying the piston rod; 313-delay seal ring; 314-a retard piston return spring; 320-delay spring; 400-pressing part; 410-piston push rod; 420-a main pump piston dust cover; 20-hydraulic braking system.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "inner," "outer," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like in the description of the present invention, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1:
Referring to fig. 1 in combination with fig. 2, the present embodiment provides a hydraulic main pump 10, which includes a valve body 100, wherein the valve body 100 is provided with a liquid storage cavity 110 and a pressure regulating cavity 120, the liquid storage cavity 110 is communicated with the pressure regulating cavity 120 through an exhaust hole 130, the liquid storage cavity 110 is provided with a first oil outlet 112, and the pressure regulating cavity 120 is provided with a second oil outlet 122; a pressing mechanism 200, the pressing mechanism 200 being disposed in the liquid storage chamber 110, the pressing mechanism 200 being configured to apply pressure to hydraulic oil in the liquid storage chamber 110; and a pressure regulating mechanism 300, wherein the pressure regulating mechanism 300 is arranged in the pressure regulating cavity 120, and the pressure regulating mechanism 300 is configured to regulate the hydraulic pressure in the pressure regulating cavity 120.
In this embodiment, the pressure applying mechanism 200 includes a main pump piston portion 210 and a pressure applying portion 400, where the main pump piston portion 210 is slidably matched with the fluid storage chamber 110 along an axial direction, and pushes the main pump piston portion 210 to change the pressure of the hydraulic oil in the fluid storage chamber 110; the pressing portion 400 is configured to apply pressure to the main pump piston portion 210 so that the main pump piston portion 210 slides toward the inside of the reservoir 110 in the axial direction.
The specific mechanism form of the pressing mechanism 200 is not limited herein, and in other specific embodiments, the pressing mechanism 200 may be configured as a supercharger or the like according to the needs of the user.
Specifically, in the present embodiment, the pressing part 400 includes a main pump piston push rod 410 and a main pump piston dust cover 420; the main pump piston push rod 410 abuts against the annular baffle 213 of the main pump piston portion 210, the end portion of the main pump piston push rod 410 is configured as a hemispherical shape, and the annular baffle 213 is configured with an arc-shaped groove matched with the hemispherical end portion.
During the application of pressure, the main pump piston portion 210 is pushed to move toward the reservoir 110 by pushing the main pump piston push rod 410.
In the present embodiment, the main pump piston portion 210 includes a piston head 211, a piston rod 212, an annular baffle 213, a first seal 214, and a piston return spring 216; the piston head 211 and the annular baffle 213 are disposed at two ends of the piston rod 212, and the first seal 214 is disposed at an end surface of the piston head 211 away from the piston rod 212; the piston return spring 216 has one end connected to the first seal 214 and the other end abutting the reservoir 110..
Specifically, in the present embodiment, the first seal 214 is provided in a Y-shape.
Specifically, in this embodiment, the main pump piston portion 210 includes a second sealing member 215, the second sealing member 215 is sleeved on the piston rod 212, and one end of the second sealing member 215 abuts against the annular baffle 213.
Specifically, in the present embodiment, the second sealing member 215 is provided in a Y shape.
After the pressure is applied to the main pump piston portion 210, the piston return spring 216 may push the piston rod 212 to return to the initial position, so that the next pressure is applied.
In this embodiment, an oil port is disposed on the inner wall of the liquid storage chamber 110, and when the piston return spring 216 is in the initial state, the oil port is disposed on a side of the first sealing member 214 close to the piston return spring 216.
During the pressing process, the main pump piston portion 210 moves toward the inner side of the liquid storage cavity 110, and continues to press the pressure, so that the piston head 211 passes over the oil through port, and further, the system hydraulic pressure is generated in the liquid storage cavity 110. One part of the hydraulic oil is output through the first oil outlet 112, the other part of the hydraulic oil flows into the pressure regulating cavity 120, and the pressure or the outflow mode of the hydraulic oil from the second oil outlet 122 is changed through the regulation of the pressure regulating mechanism 300.
In this embodiment, the pressure regulating mechanism 300 includes a delay piston member 310 and a delay spring 320, where the delay piston member 310 and the delay spring 320 are both disposed in the pressure regulating chamber 120; the retard spring 320 is configured to cause the retard piston member 310 to have a tendency to move toward the exhaust hole 130.
In the present embodiment, the pressure regulating mechanism 300 is configured to have a delay function, so as to delay the output of braking power from the second oil outlet 122 of the pressure regulating chamber 120.
In this embodiment, the retard piston member 310 includes a retard piston head 311, a retard piston rod 312, a retard seal 313, and a retard piston return spring 314; the retard piston head 311 is disposed at one end of the retard piston rod 312; the delay sealing ring 313 is sleeved on the delay piston rod 312, a space is reserved between the delay sealing ring 313 and the side walls of the delay piston rod 312 and the pressure regulating cavity 120 respectively, and an annular boss is arranged at the end part of the pressure regulating cavity 120, which is close to the pressure input port; the delay spring 320 is sleeved on the delay piston rod 312, one end of the delay spring is abutted against the delay sealing ring 313, and the other end is abutted against the pressure regulating cavity 120 so as to abut the delay sealing ring 313 against the annular boss; the retard piston return spring 314 is provided at an end of the retard piston rod 312 remote from the retard piston head 311 so that there is a space between the piston head 211 and the retard seal 313; the spring force of the retard spring 320 is greater than the spring force of the retard piston return spring 314.
During braking, hydraulic oil is input through the exhaust hole 130, when the pressure of the retard piston head 311 in the direction of the pressure regulating cavity 120 is greater than the elastic force of the retard piston return spring 314, the retard piston member 310 starts to move until the end face of the retard piston head 311 contacts with the retard seal ring 313, at this time, the pressure input port is blocked from the pressure regulating cavity 120, the pressure of the pressure input port continues to be increased, that is, the rear input pressure continues to be increased, and when the pressure of the end face of the retard piston head 311 is greater than the elastic force of the retard spring 320, the retard piston head 311 presses the retard spring 320 to move towards the inner side of the pressure regulating cavity 120 until the exhaust hole 130 is communicated with the second oil outlet 122, at this time, the retard is released.
It should be noted that the hydraulic main pump 10 provided in this embodiment may be applied to a motorcycle, an automobile, or other machinery requiring braking and proportional braking.
In this embodiment, a delay spring base (not shown) is disposed in the pressure regulating chamber 120, the delay piston rod 312 slidably penetrates through the delay spring base, one end of the delay spring 320 abuts against the delay seal 313, and the other end abuts against the delay spring base.
The hydraulic main pump 10 provided in the embodiment of the invention comprises a valve body 100, a pressing mechanism 200 and a pressure regulating mechanism 300, wherein the valve body 100 is provided with a liquid storage cavity 110 and a pressure regulating cavity 120, and the liquid storage cavity 110 is communicated with the pressure regulating cavity 120 through an exhaust hole 130; the reservoir 110 has a first outlet 112 and the pressure regulating chamber 120 has a second outlet 122. The pressing mechanism 200 is disposed in the liquid storage chamber 110, and the pressing mechanism 200 is configured to apply pressure to the hydraulic oil in the liquid storage chamber 110. The pressure regulating mechanism 300 is disposed in the pressure regulating chamber 120, and the pressure regulating mechanism 300 is configured to regulate the hydraulic pressure in the pressure regulating chamber 120. In the braking process, the pressure is applied to the hydraulic oil in the liquid storage cavity 110 by the pressure applying mechanism 200, a part of the hydraulic oil is output through the first oil outlet 112, and the other part of the hydraulic oil flows into the pressure regulating cavity 120, and the pressure or the outflow mode of the hydraulic oil from the second oil outlet 122 is changed by the regulation of the pressure regulating mechanism 300. The hydraulic main pump 10 provided by the invention can change one-position input into two-position hydraulic output, and the two-position output hydraulic pressure is different, so that the problem of overlarge front braking force caused in linkage braking can be effectively avoided, the front braking distribution ratio and the rear braking distribution ratio are more suitable, and the braking is smoother and quicker.
Example 2:
In this embodiment, the pressure regulating mechanism 300 includes a proportional piston rod, a proportional piston head, a proportional spring, and an annular stop (not shown); a proportional sealing ring is arranged in the pressure regulating cavity 120 and close to the pressure output port; the proportional piston rod, the proportional piston head, the proportional spring and the annular stop block are all arranged in the pressure regulating cavity 120; the proportional piston rod slidably penetrates through the proportional sealing ring, the proportional piston head is arranged at one end of the proportional piston rod, the annular stop block is annularly arranged on the proportional piston rod and coaxial with the proportional piston rod, and the proportional piston head and the annular stop block are arranged at two sides of the proportional sealing ring; the proportional spring is sleeved on the proportional piston rod, one end of the proportional spring is abutted against the annular stop block, and the other end of the proportional spring is abutted against the pressure regulating cavity 120; when the proportional spring is in an initial state, the annular stop block and the proportional piston head are spaced from the proportional sealing ring; the end of the proportional piston rod, which is far away from the proportional piston head, is provided with a preset gap with the pressure regulating cavity 120.
In the braking process, as the pressure in the liquid storage cavity 110 increases, hydraulic oil flows into the pressure regulating cavity 120, when the pressure in the direction of the proportional piston head and the annular stop block pointing to the pressure regulating cavity 120 is larger than the elastic force of the proportional spring, the proportional piston head moves towards the inner side of the pressure regulating cavity 120 until the proportional piston head contacts with the proportional sealing ring, so that the exhaust hole 130 is separated from the pressure regulating cavity 120, and the pressure output by the second oil outlet 122 is determined by the elastic force of the proportional spring.
After the proportional piston is contacted with the proportional sealing ring, the pressure of the pressure regulating cavity 120 is continuously increased, when the pressure born by the proportional sealing ring is instantaneously greater than the pressure born by the proportional piston head and the annular stop block in the direction of the pressure regulating cavity 120, the proportional piston instantaneously moves back, the pressure output port is instantaneously communicated with the pressure regulating cavity 120, but immediately returns to the condition that the proportional piston head and the annular stop block are independently subjected to the pressure in the direction of the pressure regulating cavity 120, and the proportional piston head is instantaneously reset and is contacted with the proportional sealing ring, so that the exhaust hole 130 is separated from the pressure regulating cavity 120, and the proportional piston is always in an on-off balance state in the next working.
A proportional spring base (not shown in the figure) is disposed in the pressure regulating cavity 120, the proportional piston rod slidably penetrates through the proportional spring base, one end of the proportional spring abuts against the annular stop block, and the other end of the proportional spring abuts against the proportional spring base.
The pressure regulating mechanism 300 is not limited to the two specific structures in the embodiment 1 and the embodiment 2, and may be configured as other structures according to the actual requirements of the user.
Example 3:
Fig. 3 is a schematic diagram of the overall structure of a hydraulic brake system 20 according to embodiment 2 of the present invention. Referring to fig. 3, the present embodiment provides a hydraulic brake system 20, where the hydraulic brake system 20 includes any one of the hydraulic main pumps 10 described above. In the implementation process, an input force F is applied to the pedal, the pedal output force P is converted into a hydraulic output P1 and a hydraulic output P2 through the hydraulic main pump 10, and the hydraulic outputs (P1 and P2) at two positions are different, so that the difference of front and rear braking forces is realized, and the braking stability is enhanced.
The hydraulic brake system 20 provided by the invention comprises the hydraulic main pump 10, so that the hydraulic brake system has the beneficial effects.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (5)
1. A hydraulic main pump, characterized in that it comprises:
the valve body is provided with a liquid storage cavity and a pressure regulating cavity, the liquid storage cavity is communicated with the pressure regulating cavity through an exhaust hole, the liquid storage cavity is provided with a first oil outlet, and the pressure regulating cavity is provided with a second oil outlet;
a pressure applying mechanism disposed within the reservoir, the pressure applying mechanism configured to apply pressure to hydraulic oil within the reservoir;
the pressure regulating mechanism is arranged in the pressure regulating cavity and is configured to regulate the output size or time of hydraulic oil in the pressure regulating cavity;
The pressure applying mechanism comprises a main pump piston part and a pressure applying part, wherein the main pump piston part is in sliding fit with the liquid storage cavity and pushes the main pump piston part to be used for changing the pressure of hydraulic oil in the liquid storage cavity; the pressing portion is configured to apply pressure to the main pump piston portion so that the main pump piston portion slides axially inward of the reservoir;
The main pump piston part comprises a piston head, a piston rod, an annular baffle, a first sealing piece and a piston return spring; the piston head and the annular baffle are arranged at two ends of the piston rod, and the first sealing piece is arranged at the end face of the piston head far away from the piston rod; one end of the piston return spring is connected with the first sealing piece, and the other end of the piston return spring is abutted against the liquid storage cavity;
The pressure regulating mechanism comprises a delay piston piece and a delay spring, and the delay piston piece and the delay spring are arranged in the pressure regulating cavity; the retard spring is configured to cause the retard piston member to have a tendency to move toward the exhaust hole;
The delay piston piece comprises a delay piston head, a delay piston rod, a delay sealing ring and a delay piston return spring; the delay piston head is arranged at one end of the delay piston rod; the delay sealing ring is sleeved on the delay piston rod, a space is reserved between the delay sealing ring and the side wall of the delay piston rod and the side wall of the pressure regulating cavity respectively, and an annular boss is arranged at the end part of the pressure regulating cavity, which is close to the pressure input port; the delay spring is sleeved on the delay piston rod, one end of the delay spring is abutted with the delay sealing ring, and the other end of the delay spring is abutted with the pressure regulating cavity so as to enable the delay sealing ring to be abutted on the annular boss; the delay piston return spring is arranged at one end of the delay piston rod, which is far away from the delay piston head, so that a gap is reserved between the piston head and the delay sealing ring; the elasticity of the delay spring is larger than that of the delay piston return spring;
The pressure regulating mechanism comprises a proportional piston rod, a proportional piston head, a proportional spring and an annular stop block; a proportional sealing ring is arranged in the pressure regulating cavity close to the pressure output port; the proportional piston rod, the proportional piston head, the proportional spring and the annular stop block are all arranged in the pressure regulating cavity; the proportional piston rod slidably penetrates through the proportional sealing ring, the proportional piston head is arranged at one end of the proportional piston rod, the annular stop block is annularly arranged on the proportional piston rod and coaxial with the proportional piston rod, and the proportional piston head and the annular stop block are arranged at two sides of the proportional sealing ring; the proportional spring is sleeved on the proportional piston rod, one end of the proportional spring is abutted against the annular stop block, and the other end of the proportional spring is abutted against the pressure regulating cavity; when the proportional spring is in an initial state, the annular stop block and the proportional piston head are spaced from the proportional sealing ring; the end part of the proportional piston rod, which is far away from the proportional piston head, is provided with a preset gap with the pressure regulating cavity.
2. The hydraulic main pump of claim 1, wherein the reservoir inner wall is provided with an oil port disposed on a side of the first seal member adjacent the piston return spring when the piston return spring is in an initial state.
3. The hydraulic main pump of claim 1, wherein a retard spring mount is disposed within the pressure regulating chamber, the retard piston rod slidably extends through the retard spring mount, one end of the retard spring abuts the retard seal, and the other end abuts the retard spring mount.
4. The hydraulic main pump of claim 1, wherein a proportional spring mount is disposed in the pressure regulating chamber, the proportional piston rod slidably penetrates the proportional spring mount, one end of the proportional spring abuts against the annular stop, and the other end of the proportional spring abuts against the proportional spring mount.
5. A hydraulic brake system including the hydraulic main pump according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811341880.3A CN109204273B (en) | 2018-11-12 | 2018-11-12 | Hydraulic main pump and hydraulic braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811341880.3A CN109204273B (en) | 2018-11-12 | 2018-11-12 | Hydraulic main pump and hydraulic braking system |
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| Publication Number | Publication Date |
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| CN109204273A CN109204273A (en) | 2019-01-15 |
| CN109204273B true CN109204273B (en) | 2024-04-26 |
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| CN201811341880.3A Active CN109204273B (en) | 2018-11-12 | 2018-11-12 | Hydraulic main pump and hydraulic braking system |
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| CN116700374B (en) * | 2023-08-03 | 2023-10-24 | 合肥市富林物联网技术股份有限公司 | Positive and negative pressure and differential pressure transmission control system and device thereof |
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| CN209191922U (en) * | 2018-11-12 | 2019-08-02 | 湖北航特科技有限责任公司 | A kind of hydraulic main pump and brake fluid system |
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2018
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| US5557935A (en) * | 1995-05-23 | 1996-09-24 | Kelsey-Hayes Company | Apply-rate-independent fast-fill master cylinder |
| CN103223934A (en) * | 2012-01-25 | 2013-07-31 | 株式会社万都 | Pre-fill system to improve brake feel and method of increasing initial flux using the same |
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| CN106005212A (en) * | 2016-07-12 | 2016-10-12 | 湖北航特科技有限责任公司 | Hydraulic delay proportional distribution linking system |
| CN206068063U (en) * | 2016-07-12 | 2017-04-05 | 湖北航特科技有限责任公司 | Fluid pressure linkage brakes |
| CN209191922U (en) * | 2018-11-12 | 2019-08-02 | 湖北航特科技有限责任公司 | A kind of hydraulic main pump and brake fluid system |
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| CN109204273A (en) | 2019-01-15 |
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