CN114802142A - Plunger type brake master cylinder with automobile constant-pressure quick-charging structure - Google Patents
Plunger type brake master cylinder with automobile constant-pressure quick-charging structure Download PDFInfo
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- CN114802142A CN114802142A CN202210349427.7A CN202210349427A CN114802142A CN 114802142 A CN114802142 A CN 114802142A CN 202210349427 A CN202210349427 A CN 202210349427A CN 114802142 A CN114802142 A CN 114802142A
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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
- B60T13/12—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 liquid
- B60T13/14—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 liquid using accumulators or reservoirs fed by pumps
- B60T13/142—Systems with master cylinder
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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
- B60T13/12—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 liquid
- B60T13/16—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 liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/161—Systems with master cylinder
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
The invention provides a plunger type brake master cylinder with an automobile constant-pressure quick-charging structure, wherein a constant-pressure quick-charging assembly is arranged between a first brake cavity and a liquid supply cavity, and the constant-pressure quick-charging assembly consists of a valve rod, a quick-charging valve sealing ring, a return spring, an O-shaped ring, a valve seat and a plug. When the master pump is in a static state, the sealing ring of the quick-charging valve forms a plug for an oil return hole under the action of a return spring, when a first plunger moves forwards under the action of a pedal mechanism to close a first oil inlet hole, the volume of a liquid supply cavity is changed during movement, brake liquid is pushed into a first brake cavity from the liquid supply cavity, at the moment, the constant-pressure quick-charging assembly plays a role, when the first brake cavity does not reach a certain pressure, the oil return hole communicated with the liquid supply cavity is always kept in a closed state in the quick-charging process, and the brake liquid in the liquid supply cavity is prevented from entering a liquid storage tank through a first oil supply port, so that the purpose of quickly supplying the brake liquid is achieved, and no brake liquid loss exists in the quick-charging process.
Description
Technical Field
The invention relates to the technical field of automobile braking, in particular to a plunger type brake master cylinder with an automobile constant-pressure quick-charging structure.
Background
The master cylinder, also known as the hydraulic master cylinder, is the power source for the service brake system. The main function of the brake master cylinder is to convert the mechanical force applied by the driver on the brake pedal and the vacuum booster into brake oil pressure, and to send the brake fluid with a certain pressure to the brake cylinders (sub-pumps) of each wheel through the brake pipeline, and then to convert the brake fluid into wheel braking force by the wheel brakes.
Referring to fig. 1, a conventional quick-charging type brake master cylinder is composed of a cylinder body a with a stepped structure, a stepped piston assembly B, and a quick-charging valve assembly C (see fig. 2) arranged at the position of an oil inlet. When the piston assembly B moves forwards under the action of the pedal mechanism force, the brake fluid is quickly pushed into the brake cavity N from the fluid supply cavity M due to the stepped structure of the inner hole of the cavity and the action of the quick-charging valve assembly C at the position of the oil inlet, so that the aim of quickly supplying the fluid is fulfilled. However, because the quick-charging valve assembly C with this structure has a quick-charging valve core 04 with an oil through groove (as shown in fig. 2), during the process of realizing quick liquid supply, a part of brake fluid can flow back to the liquid storage tank L, and a part of brake fluid is lost, so that the purpose of quick liquid supply is lost.
Secondly, the quick-charging valve component C of the structure has the following corresponding accessories: the upper valve body 01, the quick-charging sealing ring 02 and the lower valve body 05 have high development cost; the cylinder body A has complex processing technology and high difficulty; and the upper valve body 01, the quick-charging sealing ring 02, the lower valve body 05, the snap spring and the like are difficult to assemble, so that the production efficiency is low.
In conclusion, the brake master cylinder with the traditional quick-charging structure has low production efficiency, high development cost and perfect quick-charging performance.
Disclosure of Invention
In order to solve the problems pointed out in the background technology, the invention provides a plunger type brake master cylinder of an automobile constant-pressure quick-charging structure type. To solve the above problems
The technical scheme of the invention is realized as follows:
a plunger type brake master cylinder of an automobile constant-pressure quick-charging structure comprises a cylinder body, wherein a second plunger and a first plunger are sequentially arranged in the cylinder body from front to back, the rear end of the first plunger extends out of the cylinder body, a first brake cavity is formed between the first plunger and the second plunger, and a second brake cavity is formed between the front end of the second plunger and the cylinder body;
the diameter of the front half part of the first plunger is smaller than that of the rear half part of the first plunger, two first sealing leather rings are arranged between the outer peripheral surface of the first plunger and the inner wall of the cylinder body, the first sealing leather ring positioned on the front side forms sealing fit between the outer peripheral surface of the front half part of the first plunger and the inner wall of the cylinder body, and the first sealing leather ring positioned on the rear side can form sealing fit between the outer peripheral surface of the rear half part of the first plunger and the inner wall of the cylinder body;
a liquid supply cavity is formed between the outer peripheral surface of the front half part of the first plunger and the cylinder body, a first oil supply port is formed in the cylinder body, a first oil inlet hole communicated with the liquid supply cavity and the first oil supply port is formed in the inner wall of the cylinder body, the first oil inlet hole is located on the rear side of the first sealing leather ring, the cross section of the first sealing leather ring is U-shaped, and the first sealing leather ring is provided with an opening towards the front side;
the outer side wall of the cylinder body is provided with an oil return port, the oil return port comprises a first hole, a second hole and a third hole which are sequentially arranged from inside to outside along the radial direction of the cylinder body, the diameter of the first hole is smaller than that of the second hole, the diameter of the second hole is smaller than that of the third hole, and the bottom of the first hole is provided with an oil return hole communicated with the liquid supply cavity;
the quick-charging valve comprises a valve rod, a quick-charging valve sealing ring, a return spring, an O-shaped ring, a valve seat and an end cap, wherein the valve rod consists of three parts, the three parts of the valve rod are respectively a front section, a middle section and a rear section, the diameters of the front section, the middle section and the rear section of the valve rod are sequentially increased, the front section and the front end of the middle section of the valve rod are connected in a first hole, the front end of the front section connected with the quick-charging valve sealing ring forms a plug for an oil return hole, the diameter of the rear section of the valve rod is larger than that of the first hole, the diameter of the front section of the valve rod is smaller than that of the first hole, an oil return cavity is formed between the front section of the valve rod and the first hole, and is communicated with a first oil supply port;
the valve seat is connected in the second hole, the front end of the valve seat abuts against the bottom of the second hole, the plug is in threaded connection with the third hole, the front end of the plug abuts against the rear end of the valve seat, a concave hole is formed in the front end face of the valve seat, the rear end of the valve rod extends into the concave hole, the valve rod can move in the axial direction of the oil return port, a mounting hole penetrating through the rear end of the valve rod is formed in the valve rod, a return spring is arranged in the mounting hole, one end of the return spring abuts against the bottom of the mounting hole, the other end of the return spring abuts against the valve seat, and a first flow channel communicated with the mounting hole is formed in the side wall of the front section of the valve rod;
and O-shaped rings are respectively arranged between the outer peripheral surface of the middle section of the valve rod and the side wall of the first hole, between the outer peripheral surface of the rear section of the valve rod and the side wall of the concave hole, and between the valve seat and the side wall of the second hole, a jacking cavity is formed between the side wall of the concave hole and the outer peripheral surface of the middle section of the valve rod, and the first braking cavity is communicated with the jacking cavity.
The invention is further provided that the first oil supply port is communicated with the liquid storage tank.
The invention is further provided that the cylinder body is provided with oil outlet holes which are respectively communicated with the first brake cavity and the second brake cavity.
The invention is further arranged in a way that an annular oil return flow channel is arranged on the outer side wall of the cylinder body, and the oil return hole is communicated with the oil return flow channel.
The invention is further provided that the first plunger is provided with a first compensation hole communicating the first brake chamber and the liquid supply chamber.
The invention is further arranged in that two second sealing rubber rings are arranged between the outer peripheral surface of the second plunger and the inner wall of the cylinder body, a second oil supply port is arranged on the cylinder body, a second oil inlet hole communicated with the second brake cavity and the second oil supply port is arranged on the inner wall of the cylinder body, and a second compensation hole communicated with the second oil inlet hole and the second brake cavity is arranged on the second plunger.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention provides a plunger type brake master cylinder with an automobile constant-pressure quick-charging structure, wherein a constant-pressure quick-charging assembly is arranged between a first brake cavity and a liquid supply cavity, and the constant-pressure quick-charging assembly consists of a valve rod, a quick-charging valve sealing ring, a return spring, an O-shaped ring, a valve seat and a plug. When the master pump is in a static state, the sealing ring of the quick-charging valve forms a plug for an oil return hole under the action of a return spring, when a first plunger moves forwards under the action of a pedal mechanism to close a first oil inlet hole, the volume of a liquid supply cavity changes during movement, brake liquid is pushed into a first brake cavity from the liquid supply cavity, at the moment, a constant-pressure quick-charging assembly plays a role, when the first brake cavity does not reach a certain pressure, the oil return hole communicated with the liquid supply cavity is always kept in a closed state in the quick-charging process, the brake liquid in the liquid supply cavity is not allowed to enter a liquid storage tank through a first oil supply port, and therefore the purpose of quickly supplying oil is achieved, and no brake liquid is lost in the quick-charging process; when the pressure in the first brake cavity is increased to a pressure value which is greater than the pressure value set by the constant-pressure quick-charging assembly, the sealing ring of the quick-charging valve is opened to block the oil return hole, the liquid supply cavity is communicated with the first oil supply port, and redundant brake liquid flows back to the liquid storage tank; after the acting force of the pedal mechanism is cancelled, the sealing ring of the quick-filling valve forms plugging to the oil return hole under the action of the return spring, and the initial state is recovered.
Secondly, in the traditional design, in the quick charging process, quick charging pressure acts on a large-area piston, so that the reaction force on the piston is large; the constant-pressure quick-charging assembly is connected with the brake cavity, quick-charging pressure acts on a small area, and reaction force on the piston is small, so that force required by a pedal mechanism is smaller when the same quick-charging effect is realized under the same condition.
The technical scheme has the advantages of simple and novel design structure, low processing and manufacturing cost, better quick charging effect and stable performance in practical operation, and is an innovative and reliable design scheme.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 these drawings without creative efforts.
FIG. 1 is a schematic structural view of a brake master cylinder of the prior art;
FIG. 2 is a schematic structural view of a quick fill valve assembly of the prior art;
FIG. 3 is a schematic structural view of a master cylinder for a brake of the present invention;
FIG. 4 is a schematic structural view of a closed state of the constant pressure quick charging assembly according to the present invention;
fig. 5 is a schematic structural diagram of the open state of the constant-pressure quick-charging assembly according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention is described below with reference to fig. 1-5:
the utility model provides a brake master cylinder of plunger type of car level pressure quick charge structural formula, includes cylinder body 1, cylinder body 1 in by preceding second plunger 2 and first plunger 3 of being equipped with in proper order after to, outside the rear end of first plunger 3 extended cylinder body 1, formed first brake chamber 4 between first plunger 3 and the second plunger 2, formed second brake chamber 5 between the front end of second plunger 2 and the cylinder body 1.
The diameter of the front half part of the first plunger 3 is smaller than that of the rear half part of the first plunger 3, two first sealing leather rings 6 are arranged between the outer peripheral surface of the first plunger 3 and the inner wall of the cylinder body 1, the first sealing leather rings 6 positioned on the front side form sealing fit between the outer peripheral surface of the front half part of the first plunger 3 and the inner wall of the cylinder body 1, and the first sealing leather rings 6 positioned on the rear side can form sealing fit between the outer peripheral surface of the rear half part of the first plunger 3 and the inner wall of the cylinder body 1.
Form between the first half's of first plunger 3 outer peripheral face and the cylinder body 1 and supply liquid chamber 7, be equipped with first fuel feeding port 8 on the cylinder body 1, be equipped with the first inlet port 9 that the intercommunication supplied liquid chamber 7 and first fuel feeding port 8 on the inner wall of cylinder body 1, first inlet port 9 is located the rear side of first sealing leather collar 6, first sealing leather collar 6 the cross-section be the U-shaped, first sealing leather collar 6 sets up forward for the opening side.
The outer side wall of the cylinder body 1 is provided with an oil return port 10, the oil return port 10 comprises a first hole 101, a second hole 102 and a third hole 103 which are sequentially arranged from inside to outside along the radial direction of the cylinder body 1, the diameter of the first hole 101 is smaller than that of the second hole 102, the diameter of the second hole 102 is smaller than that of the third hole 103, and the bottom of the first hole 101 is provided with an oil return hole 11 communicated with the liquid supply cavity 7.
The quick-charging valve sealing ring sealing structure further comprises a valve rod 12, a quick-charging valve sealing ring 13, a return spring 14, an O-shaped ring 15, a valve seat 16 and a plug 17, wherein the valve rod 12 is composed of three parts, the three parts of the valve rod 12 are a front section 121, a middle section 122 and a rear section 123 respectively, the front section 121, the middle section 122 and the rear section 123 of the valve rod 12 are sequentially enlarged in diameter, the front ends of the front section 121 and the middle section 122 of the valve rod 12 are connected in a first hole 101, the quick-charging valve sealing ring 13 is connected to the front end of the front section 121 to form plugging of the oil return hole 11, the diameter of the rear section 123 of the valve rod 12 is larger than that of the first hole 101, the diameter of the front section 121 of the valve rod 12 is smaller than that of the first hole 101, an oil return cavity 18 is formed between the front section 121 of the valve rod 12 and the first hole 101, and the oil return cavity 18 is communicated with the first oil supply port 8 through a second flow channel 302.
The valve seat 16 is connected in hole two 102, and the front end of valve seat 16 offsets with the bottom in hole two 102, and end cap 17 and three 103 threaded connection in hole, and the front end of end cap 17 offsets with the rear end of valve seat 16, is equipped with shrinkage pool 19 on the preceding terminal surface of valve seat 16, and the rear end of valve rod 12 stretches into shrinkage pool 19 in, valve rod 12 can move along oil return port 10 axial direction, and the inside of valve rod 12 is equipped with the mounting hole 20 that runs through its rear end, and return spring 14 sets up in mounting hole 20, and return spring 14's one end offsets with the bottom of mounting hole 20, and return spring 14's the other end offsets with valve seat 16, is equipped with the runner one 21 with mounting hole 20 intercommunication on the lateral wall of the anterior segment 121 of valve rod 12, and 21 intercommunication mounting hole 20 and oil return chamber 18.
O-shaped rings 15 are respectively arranged between the outer peripheral surface of the middle section 122 of the valve rod 12 and the side wall of the first hole 101, between the outer peripheral surface of the rear section 123 of the valve rod 12 and the side wall of the concave hole 19, and between the valve seat 16 and the side wall of the second hole 102, a top pressure cavity 22 is formed between the side wall of the concave hole 19 and the outer peripheral surface of the middle section 122 of the valve rod 12, and the first brake cavity 4 and the top pressure cavity 22 are communicated through a flow passage 303.
The first oil supply port 8 is communicated with the liquid storage tank.
The cylinder body 1 is provided with an oil outlet 23 which is respectively communicated with the first brake cavity 4 and the second brake cavity 5.
The outer side wall of the cylinder body 1 is provided with an annular oil return flow passage 24, and the oil return hole 11 is communicated with the oil return flow passage 24.
And a first compensation hole 25 for communicating the first brake cavity 4 with the liquid supply cavity 7 is formed in the first plunger 3.
The outer peripheral face of the second plunger 2 and the inner wall of the cylinder body 1 are provided with two second sealing rubber rings 26 therebetween, the cylinder body 1 is provided with a second oil supply port 27, the inner wall of the cylinder body 1 is provided with a second oil inlet hole 28 communicated with the second brake cavity 5 and the second oil supply port 27, and the second plunger 2 is provided with a second compensation hole 29 communicated with the second oil inlet hole 28 and the second brake cavity 5.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention provides a plunger type brake master cylinder with a constant-pressure quick-charging structure for an automobile, wherein a constant-pressure quick-charging assembly is arranged between a first brake cavity 4 and a liquid supply cavity 7, and the constant-pressure quick-charging assembly consists of a valve rod 12, a quick-charging valve sealing ring 13, a return spring 14, an O-shaped ring 15, a valve seat 16 and a plug 17. When the master pump is in a static state, under the action of a return spring 14, a quick-charging valve sealing ring 13 blocks an oil return hole 11, when a first plunger 3 moves forwards under the action of a pedal mechanism, a first oil inlet hole 9 is closed, the volume of a liquid supply cavity 7 changes during movement, brake liquid is pushed into a first brake cavity 4 from the liquid supply cavity 7, at the moment, a constant-pressure quick-charging assembly plays a role, when the first brake cavity 4 does not reach a certain pressure, the oil return hole 11 communicated with the liquid supply cavity 7 is always kept in a closed state in the quick-charging process, the brake liquid in the liquid supply cavity 7 is not allowed to enter a liquid storage tank through a first oil supply port 8, the purpose of quick oil supply is achieved, and no brake liquid loss exists in the quick-charging process. When the pressure in the first brake chamber 4 is increased to a pressure value larger than the pressure value set by the constant-pressure quick-charging assembly, the sealing ring 13 of the quick-charging valve opens the seal of the oil return hole 11, the liquid supply chamber 7 is communicated with the first oil supply port 8, and redundant brake liquid flows back to the liquid storage tank. After the acting force of the pedal mechanism is removed, the quick-charging valve sealing ring 13 forms a plug for the oil return hole 11 under the action of the return spring 14, and the initial state is recovered.
Secondly, in the conventional design, in the quick charging process, quick charging pressure acts on a large-area piston, so that the reaction force on the piston is large. The constant-pressure quick-charging assembly is connected with the brake cavity, quick-charging pressure acts on a small area, and reaction force on the piston is small, so that force required by a pedal mechanism is smaller when the same quick-charging effect is realized under the same condition.
The technical scheme has the advantages of simple and novel design structure, low processing and manufacturing cost, better quick charging effect and stable performance in practical operation, and is an innovative and reliable design scheme.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A plunger type brake master cylinder of an automobile constant-pressure quick-charging structure is characterized in that: the brake device comprises a cylinder body, wherein a second plunger and a first plunger are sequentially arranged in the cylinder body from front to back, the rear end of the first plunger extends out of the cylinder body, a first brake cavity is formed between the first plunger and the second plunger, and a second brake cavity is formed between the front end of the second plunger and the cylinder body;
the diameter of the front half part of the first plunger is smaller than that of the rear half part of the first plunger, two first sealing leather rings are arranged between the outer peripheral surface of the first plunger and the inner wall of the cylinder body, the first sealing leather ring positioned on the front side forms sealing fit between the outer peripheral surface of the front half part of the first plunger and the inner wall of the cylinder body, and the first sealing leather ring positioned on the rear side can form sealing fit between the outer peripheral surface of the rear half part of the first plunger and the inner wall of the cylinder body;
a liquid supply cavity is formed between the outer peripheral surface of the front half part of the first plunger and the cylinder body, a first oil supply port is formed in the cylinder body, a first oil inlet hole communicated with the liquid supply cavity and the first oil supply port is formed in the inner wall of the cylinder body, the first oil inlet hole is located on the rear side of the first sealing leather ring, the cross section of the first sealing leather ring is U-shaped, and the opening of the first sealing leather ring is arranged towards the front side;
the outer side wall of the cylinder body is provided with an oil return port, the oil return port comprises a first hole, a second hole and a third hole which are sequentially arranged from inside to outside along the radial direction of the cylinder body, the diameter of the first hole is smaller than that of the second hole, the diameter of the second hole is smaller than that of the third hole, and the bottom of the first hole is provided with an oil return hole communicated with the liquid supply cavity;
the quick-charging valve comprises a valve rod, a quick-charging valve sealing ring, a return spring, an O-shaped ring, a valve seat and an end cap, wherein the valve rod consists of three parts, the three parts of the valve rod are respectively a front section, a middle section and a rear section, the diameters of the front section, the middle section and the rear section of the valve rod are sequentially increased, the front section and the front end of the middle section of the valve rod are connected in a first hole, the front end of the front section connected with the quick-charging valve sealing ring forms a plug for an oil return hole, the diameter of the rear section of the valve rod is larger than that of the first hole, the diameter of the front section of the valve rod is smaller than that of the first hole, an oil return cavity is formed between the front section of the valve rod and the first hole, and is communicated with a first oil supply port;
the valve seat is connected in the second hole, the front end of the valve seat abuts against the bottom of the second hole, the plug is in threaded connection with the third hole, the front end of the plug abuts against the rear end of the valve seat, a concave hole is formed in the front end face of the valve seat, the rear end of the valve rod extends into the concave hole, the valve rod can move in the axial direction of the oil return port, a mounting hole penetrating through the rear end of the valve rod is formed in the valve rod, a return spring is arranged in the mounting hole, one end of the return spring abuts against the bottom of the mounting hole, the other end of the return spring abuts against the valve seat, and a first flow channel communicated with the mounting hole is formed in the side wall of the front section of the valve rod;
and O-shaped rings are respectively arranged between the outer peripheral surface of the middle section of the valve rod and the side wall of the first hole, between the outer peripheral surface of the rear section of the valve rod and the side wall of the concave hole, and between the valve seat and the side wall of the second hole, a jacking cavity is formed between the side wall of the concave hole and the outer peripheral surface of the middle section of the valve rod, and the first braking cavity is communicated with the jacking cavity.
2. The plunger type brake master cylinder of an automobile constant-pressure quick-charging structural formula as claimed in claim 1, wherein: the first oil supply port is communicated with the liquid storage tank.
3. The plunger type brake master cylinder of an automobile constant-pressure quick-charging structural formula as claimed in claim 1, wherein: the cylinder body on be equipped with the oil outlet that communicates first braking chamber and second braking chamber respectively.
4. The plunger type brake master cylinder of an automobile constant-pressure quick-charging structural formula as claimed in claim 1, wherein: the lateral wall of the cylinder body is provided with an annular oil return flow passage, and the oil return hole is communicated with the oil return flow passage.
5. The plunger type brake master cylinder of an automobile constant-pressure quick-charging structural formula as claimed in claim 1, wherein: and the first plunger is provided with a first compensation hole for communicating the first brake cavity with the liquid supply cavity.
6. The plunger type brake master cylinder of an automobile constant-pressure quick-charging structural formula as claimed in claim 1, wherein: two second sealing rubber rings are arranged between the outer peripheral surface of the second plunger and the inner wall of the cylinder body, a second oil supply port is formed in the cylinder body, a second oil inlet hole communicated with the second braking cavity and the second oil supply port is formed in the inner wall of the cylinder body, and a second compensation hole communicated with the second oil inlet hole and the second braking cavity is formed in the second plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210349427.7A CN114802142A (en) | 2022-04-01 | 2022-04-01 | Plunger type brake master cylinder with automobile constant-pressure quick-charging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210349427.7A CN114802142A (en) | 2022-04-01 | 2022-04-01 | Plunger type brake master cylinder with automobile constant-pressure quick-charging structure |
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| Publication Number | Publication Date |
|---|---|
| CN114802142A true CN114802142A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210349427.7A Pending CN114802142A (en) | 2022-04-01 | 2022-04-01 | Plunger type brake master cylinder with automobile constant-pressure quick-charging structure |
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| CN (1) | CN114802142A (en) |
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| EP1382503A1 (en) * | 2002-07-19 | 2004-01-21 | Meritor Heavy Vehicle Braking Systems (UK) Limited | Hydraulic booster valve |
| CN110641436A (en) * | 2019-10-30 | 2020-01-03 | 浙江奔腾智能制动***有限公司 | Hydraulic brake master cylinder for agricultural machinery |
| CN210634538U (en) * | 2019-07-18 | 2020-05-29 | 浙江奔腾智能制动***有限公司 | Brake master cylinder applied to two-wheel braking |
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2022
- 2022-04-01 CN CN202210349427.7A patent/CN114802142A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1104395A (en) * | 1953-04-13 | 1955-11-18 | Bendix Aviat Corp | Power operated master cylinder |
| US3321918A (en) * | 1965-07-02 | 1967-05-30 | Ford Motor Co | Motor vehicle brake precharge system |
| FR2464169A1 (en) * | 1979-09-05 | 1981-03-06 | Weber Spa | Master cylinder for vehicle hydraulic brake - has cylinder with sliding stepped piston and non return and relief valves |
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