CN111976690A - Air booster control valve assembly and air booster - Google Patents
Air booster control valve assembly and air booster Download PDFInfo
- Publication number
- CN111976690A CN111976690A CN202010857945.0A CN202010857945A CN111976690A CN 111976690 A CN111976690 A CN 111976690A CN 202010857945 A CN202010857945 A CN 202010857945A CN 111976690 A CN111976690 A CN 111976690A
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- assembly
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- piston
- air inlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/36—Other control devices or valves characterised by definite functions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
Abstract
The invention relates to the technical field of hydraulic braking, and discloses a control valve assembly of an air booster and the air booster. The control valve assembly includes: the valve body comprises a partition plate arranged in the valve body; the valve component is arranged in the valve body and positioned on one side of the partition plate, a high-pressure air cavity is formed between the valve component and the partition plate, and the valve component can block the air inlet; the air inlet seat is partially nested in the valve body and is positioned on the other side of the partition plate; the boosting piston assembly is arranged in the valve body and positioned between the air inlet seat and the partition plate, and a boosting air cavity is formed between the boosting piston assembly and the partition plate; the power-assisted transmission assembly is movably arranged in the air inlet seat and drives the power-assisted piston assembly to push the valve assembly; the limiting assembly is arranged between the air inlet seat and the power-assisted transmission assembly and used for limiting the maximum stroke of the power-assisted transmission assembly. The air booster comprises the air booster control valve assembly. The limiting assembly limits the maximum stroke of the power-assisted transmission assembly, so that the maximum stroke of the power-assisted piston assembly is controlled, and the power-assisted transmission assembly is suitable for vehicle types with different tonnages.
Description
Technical Field
The invention relates to the technical field of hydraulic braking, in particular to a control valve assembly of a pneumatic booster and the pneumatic booster.
Background
The air booster is a mechanism which uses compressed air as boosting source to produce boosting force in hydraulic brake using working oil as transmission medium so as to raise brake efficiency and running safety.
The existing air booster has poor adaptability to different tonnage vehicle types, and the boosting air pressure value is generally adjusted by arranging a pressure limiting valve in a brake pipeline or changing the size of the air booster, so that the structure of a brake system is complex, the size is increased, and the cost is improved.
Disclosure of Invention
The invention aims to provide a control valve assembly of an air booster and the air booster, which can adapt to vehicle types with different tonnages, do not need to arrange a pressure limiting valve in a braking system, and do not need to change the sizes of a boosting piston assembly and the whole air booster, thereby reducing the production cost.
In order to realize the purpose, the following technical scheme is provided:
in a first aspect, a booster control valve assembly is provided, comprising:
the valve body comprises a clapboard arranged in the valve body, and an air inlet is arranged on the clapboard;
the valve component is arranged in the valve body and is positioned on one side of the partition plate, a high-pressure air cavity is formed between the valve component and the partition plate, and the valve component can block the air inlet;
the air inlet seat is partially nested in the valve body and is positioned on the other side of the partition plate;
the boosting piston assembly is arranged in the valve body and positioned between the air inlet seat and the partition plate, a boosting air cavity is formed between the boosting piston assembly and the partition plate, and the boosting piston assembly can push the valve assembly through the air inlet hole so as to enable the boosting air cavity to be communicated with the high-pressure air cavity;
the boosting transmission assembly is movably arranged in the air inlet seat and is abutted against the boosting piston assembly so as to drive the boosting piston assembly to jack the valve assembly;
and the limiting assembly is arranged between the air inlet seat and the power-assisted transmission assembly and is used for limiting the maximum stroke of the power-assisted transmission assembly.
As a preferred embodiment of the control valve assembly of the air booster,
the inner wall of the air inlet seat is provided with a groove, the limiting component is partially clamped in the groove, and the limiting component is abutted against the power-assisted transmission component when the power-assisted transmission component moves to the maximum stroke; or the like, or, alternatively,
the outer wall of the power-assisted transmission assembly is provided with a groove, the limiting assembly is partially clamped in the groove, and when the power-assisted transmission assembly moves to the maximum stroke, the limiting assembly is abutted to the air inlet seat.
As a preferable scheme of the control valve assembly of the air booster, the limiting component is a check ring.
As a preferred embodiment of the control valve assembly of the air booster,
the limiting assembly is a bulge convexly arranged on the inner wall of the air inlet seat, the bulge and the air inlet seat are of an integrated structure, and when the power-assisted transmission assembly moves to the maximum stroke, the bulge is abutted against the power-assisted transmission assembly; or the like, or, alternatively,
the limiting assembly is a protrusion which is convexly arranged on the outer wall of the power-assisted transmission assembly, the protrusion and the power-assisted transmission assembly are of an integrated structure, and when the power-assisted transmission assembly moves to the maximum stroke, the protrusion is abutted to the air inlet seat.
As the preferred scheme of air booster control valve assembly, the helping hand transmission subassembly includes guide block and rubber spring, the guide block movably set up in the seat of admitting air, rubber spring connect in the guide block stretches out the one end of seat of admitting air, rubber spring be located the guide block with between the helping hand piston assembly.
As the preferred scheme of atmospheric pressure booster control valve assembly, the helping hand transmission subassembly includes guide block and the first spring and the second spring that the endotheca was established, guide block movably set up in the seat of admitting air, the both ends of first spring respectively the butt in the guide block with helping hand piston assembly, the second spring is located the guide block with between the helping hand piston assembly, the guide block move to predetermine behind the stroke with the second spring butt, it is less than to predetermine the stroke the maximum stroke of guide block.
As the preferable scheme of the control valve assembly of the air booster, the boosting piston assembly comprises a piston and a piston return spring, two ends of the piston return spring are respectively abutted to the piston and the partition plate, and the piston return spring presses the piston against the air inlet seat.
As the optimal scheme of the control valve assembly of the air booster, the valve component comprises a valve, a valve sleeve and a valve return spring, the valve sleeve is sleeved on the valve, the valve sleeve is positioned between the valve and the valve body, and two ends of the valve return spring are respectively abutted against the valve and the valve sleeve.
As the preferred scheme of the control valve assembly of the air booster, a first sealing ring is arranged between the valve sleeve and the valve body, and a second sealing ring is arranged between the valve and the valve sleeve.
In a second aspect, there is provided a booster comprising a booster control valve assembly as described above.
The invention has the beneficial effects that:
in the air booster control valve assembly and the air booster comprising the same, the valve comprises the partition plate arranged in the valve, and the valve component and the air inlet seat are respectively arranged at two sides of the partition plate. A high-pressure air cavity is formed between the valve component and the partition plate. The boosting piston assembly is arranged in the valve and is positioned between the air inlet seat and the partition plate. When the vehicle is in an unbraked state, the boosting piston assembly is abutted against the air inlet seat. An assistant air cavity is formed between the assistant piston component and the clapboard. The high-pressure air enters the high-pressure air cavity, the valve assembly blocks the air inlet, and the valve assembly is in a closed state so as to isolate the high-pressure air from entering the boosting air cavity. The boosting piston assembly can push the valve assembly through the air inlet hole, so that the boosting air cavity is communicated with the high-pressure air cavity through the air inlet hole, and high-pressure air in the high-pressure air cavity enters the boosting air cavity to assist in braking. The boosting transmission assembly is movably arranged in the air inlet seat and is abutted against the boosting piston assembly. After a driver steps on the brake pedal, pedal force is transmitted to the power-assisted piston assembly through the power-assisted transmission assembly, and the power-assisted transmission assembly drives the power-assisted piston assembly to push the valve assembly. The limiting assembly is arranged between the air inlet seat and the power-assisted transmission assembly and used for limiting the maximum stroke of the power-assisted transmission assembly and further controlling the maximum stroke of the power-assisted piston assembly to control the power-assisted air pressure in the power-assisted air cavity, so that the brake system is suitable for vehicle types with different tonnages, a pressure limiting valve is not required to be arranged in the brake system, the sizes of the power-assisted piston assembly and the whole air pressure booster are not required to be changed, the brake system is simple in structure, and the production cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic view of a control valve assembly of a booster according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a control valve assembly of a pneumatic booster according to a second embodiment of the present invention.
Reference numerals:
10-high pressure air cavity; 20-an assisting air cavity;
1-a valve body; 2-a valve assembly; 3-an air inlet seat; 4-a booster piston assembly; 5-a power-assisted transmission assembly; 6-a limiting component; 71-a first stop ring; 72-a second stop ring; 81-a first sealing ring; 82-a second sealing ring; 83-third sealing ring; 9-a guide ring;
11-a separator; 111-inlet holes;
21-a valve; 22-valve sleeve; 23-a valve return spring;
41-a piston; 42-piston return spring;
51-a guide block; 52-rubber spring; 53-a first spring; 54-second spring.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a control valve assembly of a pneumatic booster, which includes a valve body 1, a valve assembly 2, an air inlet seat 3, a booster piston assembly 4 and a booster transmission assembly 5.
The valve 21 includes a diaphragm 11 disposed therein. The partition 11 divides the interior of the valve 21 into two chambers on either side thereof. The partition 11 is provided with an air intake hole 111. The valve assembly 2 and the air inlet seat 3 are respectively arranged at two sides of the clapboard 11.
A high-pressure air chamber 10 is formed between the valve component 2 and the partition plate 11. When the vehicle is in an unbraked state, high-pressure air enters the high-pressure air chamber 10, the air inlet hole 111 is blocked by the valve assembly 2, and the valve assembly 2 is in a closed state so as to prevent the high-pressure air from entering the boosting air chamber 20.
The air inlet seat 3 is partially nested in the valve body 1.
The booster piston assembly 4 is disposed in the valve 21 between the intake seat 3 and the partition 11. When the vehicle is in an unbraked state, the booster piston assembly 4 abuts against the intake seat 3. An assist air chamber 20 is formed between the assist piston assembly 4 and the partition plate 11. The boosting piston assembly 4 can push the valve assembly 2 through the air inlet hole 111, so that the boosting air chamber 20 is communicated with the high-pressure air chamber 10 through the air inlet hole 111, and high-pressure air in the high-pressure air chamber 10 enters the boosting air chamber 20 to assist in braking.
The boosting transmission assembly 5 is movably arranged in the air inlet seat 3 and is abutted against the boosting piston assembly 4. After a driver steps on a brake pedal, pedal force is transmitted to the power-assisted piston assembly 4 through the power-assisted transmission assembly 5, and the power-assisted transmission assembly 5 drives the power-assisted piston assembly 4 to push the valve assembly 2.
Illustratively, the valve assembly 2 includes a valve 21, a valve sleeve 22, and a valve return spring 23. The valve sleeve 22 is sleeved on the valve 21, and the valve sleeve 22 is located between the valve 21 and the valve body 1. A first sealing ring 81 is arranged between the valve sleeve 22 and the valve body 1. The inner wall of the port of the valve body 1 is provided with a first stop ring 71 for limiting the valve sleeve 22. A second sealing ring 82 is arranged between the valve 21 and the valve sleeve 22. Two ends of the valve return spring 23 are respectively abutted against the valve 21 and the valve sleeve 22. The valve return spring 23 presses the valve 21 against the partition 11, and the valve 21 blocks the air inlet hole 111.
The booster piston assembly 4 includes a piston 41 and a piston return spring 42. The piston 41 is located between the intake seat 3 and the partition 11. Both ends of the piston return spring 42 abut against the piston 41 and the partition plate 11, respectively, and the piston return spring 42 presses the piston 41 against the intake seat 3. A third sealing ring 83 and a guide ring 9 are arranged between the piston 41 and the valve body 1.
The booster drive assembly 5 includes a guide block 51 and a rubber spring 52. The guide block 51 is movably disposed in the air intake seat 3. The rubber spring 52 is connected to one end of the guide block 51 extending out of the air inlet seat 3, and the rubber spring 52 is located between the guide block 51 and the piston 41. The end of the guide block 51 remote from the piston 41 is in driving connection with the pedal. The guide block 51 is provided with a through hole for exhausting high-pressure gas generated between the rubber spring 52 and the piston 41 when the rubber spring 52 is deformed. The inner wall of the air inlet seat 3 is provided with a second stop ring 72, and the second stop ring 72 is positioned at one end of the guide block 51 far away from the piston 41 to limit the position of the guide block 51.
When the vehicle brakes, the driver steps on the pedal, the pedal force is transmitted to the guide block 51, the rubber spring 52, and the piston 41, and the piston return spring 42 is compressed. The guide block 51, the rubber spring 52 and the piston 41 move together to the direction close to the valve 21, the piston 41 is separated from the air inlet seat 3 and moves to the air inlet hole 111 of the partition 11, at this time, the valve 21 is about to open, that is, the piston 41 is just in contact with the valve 21, and this is the equilibrium position when the air booster assembly is boosted. With the increase of pedal force, the piston 41 presses the valve 21, the valve 21 is separated from the partition 11, high-pressure air in the high-pressure air chamber 10 enters the boosting air chamber 20 through the air inlet hole 111, the high-pressure air in the high-pressure air chamber 10 acts on the piston 41, and the piston 41 moves towards the direction close to the air inlet seat 3 against the force of the rubber spring 52 until the forces on the two sides of the piston 41 are balanced, and then boosting balance is achieved. The pedal force is continuously increased, the valve 21 is further jacked, the pressure value of the high-pressure air in the high-pressure air chamber 10 is continuously increased, the force applied to the two sides of the piston 41 is continuously increased until the power-assisted transmission assembly 5 reaches the maximum stroke, the rubber spring 52 is not deformed due to the increase of the pedal force, and therefore the pressure (namely the power-assisted air pressure) of the high-pressure air in the high-pressure air chamber 10 is not increased any more, the force applied to the two sides of the rubber spring 52 is balanced, and the air pressure booster reaches the maximum power assisting point.
The control valve assembly of this embodiment also includes a stop assembly 6. The limiting assembly 6 is arranged between the air inlet seat 3 and the power-assisted transmission assembly 5 and used for limiting the maximum stroke of the power-assisted transmission assembly 5 and further controlling the maximum stroke of the power-assisted piston assembly 4 so as to control the power-assisted air pressure in the power-assisted air cavity 20, so that the automobile type brake device is suitable for automobile types with different tonnages, a pressure limiting valve is not required to be arranged in a brake system, the sizes of the power-assisted piston assembly 4 and the whole air pressure booster are not required to be changed, and the production cost is reduced.
Illustratively, the inner wall of air inlet seat 3 is provided with the recess, and spacing subassembly 6 part card is located the recess, and when helping hand transmission subassembly 5 moved to the maximum stroke, spacing subassembly 6 and helping hand transmission subassembly 5 butt to the maximum stroke of control helping hand transmission subassembly 5. The grooves are arranged along the circumference of the air inlet seat 3 or the power transmission assembly 5. The limiting component 6 is a check ring.
Or, the groove can be arranged on the outer wall of the power-assisted transmission assembly 5, the part of the limiting assembly 6 is clamped in the groove, and when the power-assisted transmission assembly 5 moves to the maximum stroke, the limiting assembly 6 is abutted against the air inlet seat 3, so that the maximum stroke of the power-assisted transmission assembly 5 can be controlled.
Optionally, the limiting component 6 may also be a protrusion protruding from the inner wall of the air inlet seat 3, the protrusion and the air inlet seat 3 are of an integrated structure, and when the power transmission component 5 moves to the maximum stroke, the protrusion abuts against the power transmission component 5.
Or, set up the arch in the outer wall of helping hand transmission subassembly 5, protruding and helping hand transmission subassembly 5 formula structure as an organic whole, when helping hand transmission subassembly 5 moved to the maximum stroke, protruding and air inlet seat 3 butt, so also can control the maximum stroke of helping hand transmission subassembly 5.
In addition to the above examples, protrusions may be disposed on both the power transmission assembly 5 and the air inlet seat 3, and when the two protrusions abut against each other, the power transmission assembly 5 moves to the position of the maximum stroke. The limit component 6 can also be arranged in other forms as long as the limit component can control the maximum stroke of the power transmission component 5.
When the power transmission assembly 5 reaches the maximum stroke, it is possible to obtain: fInput device＝P0×SPiston 41. Wherein, FInput deviceThe force, P, applied to the guide block 51 on the side closer to the pedal0For assisting the pressure in the air chamber 20 when the air booster reaches the maximum assisting pointStrong, SPiston 41Is the effective force-receiving area of the piston 41 within the booster air chamber 20. P0Less than the cut-off pressure of the air booster, P0The specific size of the auxiliary transmission assembly 5 can be adjusted according to the braking force requirement of the whole vehicle, so that the maximum stroke of the auxiliary transmission assembly 5 is reversely deduced. The maximum travel of the power transmission assembly 5 in this embodiment is the distance L1 between the guide block 51 and the limit assembly 6 when the vehicle is not braked.
The embodiment also provides a pneumatic booster, including foretell pneumatic booster control valve assembly, can control the maximum stroke of helping hand drive assembly 5, and then control the maximum stroke of helping hand piston assembly 4 to control the helping hand atmospheric pressure in the helping hand air cavity 20, thereby adapt to the motorcycle type of different tonnages, need not to set up the pressure limiting valve in braking system, also need not to change the size of helping hand piston assembly 4 and whole pneumatic booster, reduction in production cost.
Example two:
as shown in fig. 2, the difference between the present embodiment and the first embodiment is that the power transmission assembly 5 includes a guide block 51, and a first spring 53 and a second spring 54 sleeved inside and outside, that is, the rubber spring 52 is replaced by the first spring 53 and the second spring 54 sleeved inside and outside.
The guide block 51 is movably disposed in the air intake seat 3. Both ends of the first spring 53 abut against the guide block 51 and the booster piston assembly 4, respectively. A second spring 54 is located between the guide block 51 and the booster piston assembly 4.
When the vehicle is in an unbraked state, both ends of the first spring 53 abut against the guide block 51 and the piston 41, respectively. The first spring 53 presses the guide block 51 against the second stop ring 72, and the second spring 54 is in a free state at this time, i.e., the second spring 54 has no force action with the guide block 51 and the piston 41.
When the vehicle brakes, the driver steps on the pedal, the pedal force is transmitted to the guide block 51, the first spring 53, and the piston 41, and the piston return spring 42 is compressed. The guide block 51, the first spring 53 and the piston 41 move together in a direction to approach the valve 21, and the piston 41 is separated from the intake seat 3. When the guide block 51 moves by the preset stroke (L3), the guide block 51 abuts against the second spring 54. The guide block 51, the first spring 53, the second spring 54 and the piston 41 move together in a direction to approach the valve 21. When the piston 41 moves to the air inlet hole 111 of the partition 11, the valve 21 is about to open, i.e. the piston 41 is just in contact with the valve 21, which is the equilibrium position when the air booster assembly is pressurized. With the increase of the pedal force, the piston 41 presses the valve 21, the valve 21 is separated from the partition 11, the high-pressure air in the high-pressure air chamber 10 enters the boosting air chamber 20 through the air inlet hole 111, the high-pressure air in the high-pressure air chamber 10 acts on the piston 41, and the piston 41 moves towards the direction close to the air inlet seat 3 by overcoming the forces of the first spring 53 and the second spring 54 until the forces on the two sides of the piston 41 are balanced, and then boosting balance is achieved. The pedal force continues to be increased, the valve 21 is further pushed, the pressure value of the high-pressure air in the high-pressure air chamber 10 continuously increases, the force applied to the two sides of the piston 41 continuously increases until the power-assisted transmission assembly 5 reaches the maximum stroke, the rubber spring 52 is not deformed due to the increase of the pedal force, and therefore the pressure (i.e., the power-assisted air pressure) of the high-pressure air in the high-pressure air chamber 10 is not increased, so that the forces applied to the two sides of the first spring 53 and the second spring 54 are balanced, and the air pressure booster reaches the maximum power-assisted point.
When the power transmission assembly 5 reaches the maximum stroke, it is possible to obtain: fInput device＝P0×SPiston 41. Wherein, FInput deviceThe force, P, applied to the guide block 51 on the side closer to the pedal0The pressure intensity, S, in the boosting air cavity 20 when the air booster reaches the maximum boosting pointPiston 41Is the effective force-receiving area of the piston 41 within the booster air chamber 20. P0Less than the cut-off pressure of the air booster, P0The specific size of the auxiliary transmission assembly 5 can be adjusted according to the braking force requirement of the whole vehicle, so that the maximum stroke of the auxiliary transmission assembly 5 is reversely deduced. The maximum travel of the power transmission assembly 5 in this embodiment is the distance L2 between the guide block 51 and the limit assembly 6 when the vehicle is not braked, and L3 is smaller than L2.
In this embodiment, the rubber spring 52 is replaced with a first spring 53 and a second spring 54 that are sleeved inside and outside. The deformation resistance of the rubber spring 52 increases exponentially. The respective deformation resistances of the first spring 53 and the second spring 54 increase linearly. In this embodiment, the second spring 54 starts to deform under pressure after the guide block 51 reaches the predetermined stroke. Before the guide block 51 reaches the preset stroke, the deformation resistance of the first spring 53 is changed linearly, and is the same as that of the rubber spring 52 in the initial stress stage. After the guide block 51 reaches the preset stroke, the second spring 54 and the first spring 53 are simultaneously deformed, and the deformation resistance of the spring assembly formed by the two springs has a similar variation trend to that of the rubber spring 52.
The embodiment also provides a pneumatic booster, including foretell pneumatic booster control valve assembly, can control the maximum stroke of helping hand drive assembly 5, and then control the maximum stroke of helping hand piston assembly 4 to control the helping hand atmospheric pressure in the helping hand air cavity 20, thereby adapt to the motorcycle type of different tonnages, need not to set up the pressure limiting valve in braking system, also need not to change the size of helping hand piston assembly 4 and whole pneumatic booster, reduction in production cost.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A booster control valve assembly, comprising:
the valve body (1) comprises a partition plate (11) arranged in an inner cavity of the valve body, and an air inlet hole (111) is formed in the partition plate (11);
the valve assembly (2) is arranged in the valve body (1) and is positioned on one side of the partition plate (11), a high-pressure air chamber (10) is formed between the valve assembly (2) and the partition plate (11), and the valve assembly (2) can block the air inlet (111);
the air inlet seat (3) is partially nested in the valve body (1) and is positioned on the other side of the partition plate (11);
the boosting piston assembly (4) is arranged in the valve body (1) and is positioned between the air inlet seat (3) and the partition plate (11), a boosting air cavity (20) is formed between the boosting piston assembly (4) and the partition plate (11), and the boosting piston assembly (4) can push the valve assembly (2) through the air inlet hole (111) so that the boosting air cavity (20) is communicated with the high-pressure air cavity (10);
the power-assisted transmission assembly (5) is movably arranged in the air inlet seat (3) and is abutted against the power-assisted piston assembly (4) so as to drive the power-assisted piston assembly (4) to jack the valve assembly (2);
and the limiting assembly (6) is arranged between the air inlet seat (3) and the power-assisted transmission assembly (5) and is used for limiting the maximum stroke of the power-assisted transmission assembly (5).
2. A gas booster control valve assembly as set forth in claim 1,
a groove is formed in the inner wall of the air inlet seat (3), the limiting component (6) is partially clamped in the groove, and when the power-assisted transmission component (5) moves to the maximum stroke, the limiting component (6) is abutted to the power-assisted transmission component (5); or the like, or, alternatively,
the outer wall of the power-assisted transmission assembly (5) is provided with a groove, the limiting assembly (6) is partially clamped in the groove, and when the power-assisted transmission assembly (5) moves to the maximum stroke, the limiting assembly (6) is abutted to the air inlet seat (3).
3. A booster control valve assembly according to claim 2, in which the stop element (6) is a circlip.
4. A gas booster control valve assembly as set forth in claim 1,
the limiting assembly (6) is a bulge convexly arranged on the inner wall of the air inlet seat (3), the bulge and the air inlet seat (3) are of an integrated structure, and when the power-assisted transmission assembly (5) moves to the maximum stroke, the bulge is abutted to the power-assisted transmission assembly (5); or the like, or, alternatively,
the limiting assembly (6) is a protrusion which is convexly arranged on the outer wall of the power-assisted transmission assembly (5), the protrusion and the power-assisted transmission assembly (5) are of an integrated structure, and when the power-assisted transmission assembly (5) moves to the maximum stroke, the protrusion is abutted to the air inlet seat (3).
5. A booster control valve assembly according to any one of claims 1 to 4, characterised in that the booster drive assembly (5) comprises a guide block (51) and a rubber spring (52), the guide block (51) being movably arranged in the air inlet seat (3), the rubber spring (52) being connected to an end of the guide block (51) extending out of the air inlet seat (3), the rubber spring (52) being sandwiched between the guide block (51) and the booster piston assembly (4).
6. The air pressure booster control valve assembly according to any one of claims 1 to 4, wherein the booster transmission component (5) comprises a guide block (51), and a first spring (53) and a second spring (54) sleeved inside and outside, the guide block (51) is movably arranged in the air inlet seat (3), two ends of the first spring (53) are respectively abutted against the guide block (51) and the booster piston component (4), the second spring (54) is arranged between the guide block (51) and the booster piston component (4), the guide block (51) is abutted against the second spring (54) after moving to a preset stroke, and the preset stroke is smaller than the maximum stroke of the guide block (51).
7. A booster control valve assembly according to any of claims 1 to 4, characterised in that the booster piston assembly (4) comprises a piston (41) and a piston return spring (42), the two ends of the piston return spring (42) abutting against the piston (41) and the diaphragm (11), respectively, the piston return spring (42) pressing the piston (41) against the inlet seat (3).
8. The air booster control valve assembly according to any one of claims 1 to 4, wherein the valve assembly (2) comprises a valve (21), a valve sleeve (22) and a valve return spring (23), the valve sleeve (22) is sleeved on the valve (21), the valve sleeve (22) is located between the valve (21) and the valve body (1), and two ends of the valve return spring (23) are respectively abutted against the valve (21) and the valve sleeve (22).
9. A booster control valve assembly according to claim 8, characterised in that a first sealing ring (81) is arranged between the valve sleeve (22) and the valve body (1), and a second sealing ring (82) is arranged between the valve (21) and the valve sleeve (22).
10. A booster pump comprising a booster control valve assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010857945.0A CN111976690B (en) | 2020-08-24 | 2020-08-24 | Air booster control valve assembly and air booster |
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| CN202010857945.0A CN111976690B (en) | 2020-08-24 | 2020-08-24 | Air booster control valve assembly and air booster |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324574A (en) * | 2021-01-04 | 2021-02-05 | 成都裕鸢航空零部件制造有限公司 | Aeroengine, aeroengine's (air) intake valve and air intake structure |
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| CN112324574A (en) * | 2021-01-04 | 2021-02-05 | 成都裕鸢航空零部件制造有限公司 | Aeroengine, aeroengine's (air) intake valve and air intake structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111976690B (en) | 2022-04-05 |
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