CN114439869B - Spring brake chamber with clearance change self-adjusting sealing function - Google Patents
Spring brake chamber with clearance change self-adjusting sealing function Download PDFInfo
- Publication number
- CN114439869B CN114439869B CN202210357526.XA CN202210357526A CN114439869B CN 114439869 B CN114439869 B CN 114439869B CN 202210357526 A CN202210357526 A CN 202210357526A CN 114439869 B CN114439869 B CN 114439869B
- Authority
- CN
- China
- Prior art keywords
- cavity
- sealing
- parking
- brake
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
-
- 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
- B60T13/26—Compressed-air systems
- B60T13/261—Compressed-air systems systems with both indirect application and application by springs or weights and released by compressed air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Braking Systems And Boosters (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a spring brake chamber with a gap change self-adjusting sealing function, which relates to the technical field of spring brake chambers and comprises a first shell and a second shell, wherein the first shell and the second shell are connected through a clamp, a partition plate is arranged at one end, close to the second shell, in the first shell, a sealing adjusting seat is arranged in the middle of the partition plate, and a sealing adjusting mechanism is arranged on the sealing adjusting seat, so that when a vehicle is in a non-parking brake state, a parking brake mechanism cannot move, at the moment, the sealing adjusting mechanism can be driven by using the gas pressure in a parking brake cavity to seal a gap between the sealing adjusting seat and the parking brake mechanism, and the situation that the gas in the parking brake cavity enters a service brake cavity through the gap to cause that the service brake force is automatically started in the service state to influence the driving safety is avoided.
Description
Technical Field
The invention relates to the technical field of spring brake chambers, in particular to a spring brake chamber with a gap change self-adjusting sealing function.
Background
The spring brake chamber is part of an automobile brake system; the brake is generally arranged on a drive axle of an automobile and is used for providing braking force for automobile wheels, so that the running brake and the parking brake of the automobile can be realized;
the spring brake air chamber in the prior art has the following problems when in use:
1. the spring brake chamber is a pneumatic element, the requirement on the sealing performance is high, and in order to realize the movement of parts, a certain gap is formed at the joint of the spring brake chamber in the prior art, so that the sealing performance is not high;
2. when the existing spring brake chamber is used for parking brake, all braking force comes from an energy storage spring, and the situation that the braking force is insufficient or the parking brake cannot be carried out exists;
therefore, a spring brake chamber with a gap variation self-adjusting sealing function is urgently needed to solve the technical problems.
Disclosure of Invention
The invention aims to provide a spring brake air chamber with a clearance change self-adjusting sealing function, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a spring brake air chamber with a clearance change self-adjusting sealing function comprises a first shell and a second shell, wherein the first shell is connected with the second shell through a clamp, a partition plate is arranged at one end, close to the second shell, of the interior of the first shell, a piston is arranged in the first shell, the piston divides the interior of the first shell into a parking brake cavity and a spring cavity, an energy storage spring is arranged in the spring cavity, when parking brake is needed, gas in the parking brake cavity is discharged, the piston can move towards the partition plate under the action of the energy storage spring, a diaphragm is arranged at one end, close to the first shell, of the interior of the second shell, a service brake cavity is formed between the diaphragm and the partition plate, the other side of the diaphragm forms a service brake normal pressure cavity, a return spring is arranged in the service brake normal pressure cavity, and when service brake is needed, gas is injected into the service brake cavity, so that the air pressure in the service brake cavity is increased, the diaphragm can move towards the service brake normal pressure cavity and compresses the reset spring, a sealing adjusting seat is arranged in the middle of the partition plate, a sealing adjusting mechanism is arranged on the sealing adjusting seat, a parking brake mechanism is arranged in the first shell in a penetrating manner, the sealing adjusting mechanism is used for sealing a gap between the sealing adjusting seat and the parking brake mechanism, the situation that the gas in the parking brake cavity enters the service brake cavity through the gap to cause the service brake to be started and influence the driving safety under the normal running state of a vehicle is avoided, the parking brake mechanism moves towards the service brake cavity under the action of the movement of the piston, a service brake rod is arranged at one end of the second shell in the service brake normal pressure cavity, and the parking brake mechanism moving towards the service brake cavity can drive the service brake rod to move during the parking brake, and then provide parking brake power for the vehicle, during service braking, parking brake mechanism is unmovable, and the diaphragm drives the service brake lever and removes, provides service brake power for the vehicle, service brake lever is close to diaphragm one end and is provided with the axle dish that resets, the parking brake chamber advances exhaust through the parking brake gas port, the service brake chamber advances exhaust through the service brake gas port, connect through external communicating pipe between spring chamber and the service brake constant pressure chamber.
As a preferred technical scheme, the sealing adjusting mechanism comprises a fixed seat, a stroke cavity, an air pressure port, an air pressure plate, a moving rod, a sealing mechanism, a stroke accommodating cavity and a return spring;
the sealing adjusting seat is characterized in that a plurality of fixed seats are arranged around the sealing adjusting seat, a stroke cavity is arranged in each fixed seat, an air pressure port is arranged at the top end of each fixed seat, an air pressure plate is arranged in each stroke cavity in a sliding mode, so that when air is injected into each parking braking cavity through a parking braking air port, namely a vehicle is in a non-parking braking state, the air pressure can extrude the air pressure plate through the air pressure port, the lower surface of the air pressure plate is connected with a sealing mechanism through a moving rod, when the air pressure plate is extruded, the sealing mechanism can be pushed by the moving rod to fill a gap between the sealing adjusting seat and the parking braking mechanism, the sealing effect is improved, the air in each parking braking cavity is prevented from entering the service braking cavity through the gap, the service braking is triggered uncontrollably in the service braking process, and a return spring is arranged below the air pressure plate in each stroke cavity, when the parking brake is started, the sealing mechanism can be released from sealing under the action of the return spring, the parking brake mechanism can be moved normally, the inner side of the sealing adjusting seat close to the parking brake mechanism is provided with a stroke accommodating cavity, and the sealing mechanism is driven by the moving rod to move in the stroke accommodating cavity.
As a preferred technical scheme, the sealing mechanism comprises a sealing rubber seat, an extrusion cavity and an extrusion plate;
the sealing rubber seat is internally provided with an extrusion cavity, the bottom end of the moving rod is provided with an extrusion plate, the extrusion plate is positioned inside the extrusion cavity, and a plurality of sealing mechanisms are tightly attached to each other when sealing gaps.
As a preferred technical scheme, extrusion helping hand flex points are arranged at two ends inside the extrusion cavity, two ends of the extrusion plate are mutually attached to the extrusion helping hand flex points, a deformation cavity is formed between the extrusion plate and the bottom of the extrusion cavity, the purpose is that the movable rod continues to press down to drive the extrusion plate to continue to press down after the sealing rubber seats are contacted with the parking braking mechanism, under the action of the extrusion helping hand flex points, the two adjacent sealing rubber seats can be attached to each other more tightly, and the sealing effect is further improved.
As a preferred technical scheme, the parking brake mechanism comprises a piston rod, a parking tappet, a boosting cavity and a parking rubber head;
the parking brake device is characterized in that a parking rubber head is arranged at one end, close to the sealing adjusting seat, of the piston rod, one end of the piston rod is located inside the sealing adjusting seat in a non-parking braking state, a parking tappet is fixedly mounted at the other end of the piston rod, and a power assisting cavity is arranged inside the piston rod.
As a preferred technical scheme, the piston rod is provided with a one-way air inlet which penetrates through the power-assisted cavity, so that air can only enter the power-assisted cavity through the parking braking cavity in a non-parking braking state, the parking rubber head is close to the middle of one end of the power-assisted cavity and is provided with a main air supply channel, one end of the main air supply channel is provided with a plurality of secondary air supply channels, one end of each secondary air supply channel is provided with a movable cavity which penetrates through the parking rubber head, a sealing rubber ball is arranged in the movable cavity, a stressed driving rod is arranged on the sealing rubber ball and extends out of the movable cavity in the non-parking braking state, so that the parking rubber head can extrude the reset shaft disc when the parking rubber head is in the parking braking state, the stressed driving rod can be extruded at the moment, the sealing rubber ball can not block the movable cavity any more, and the air in the power-assisted cavity can pass through the main air supply channel, The secondary air supply channel and the movable cavity enter the service brake cavity, so that larger braking force can be provided for parking braking of a vehicle, the effect of parking braking is more obvious, and the middle of the movable cavity is provided with the blocking grid plate.
According to the preferable technical scheme, the diameter of the sealing rubber ball is larger than the diameters of the two ends of the movable cavity, and the diameter of the sealing rubber ball is smaller than the diameter of the middle of the movable cavity, so that when a vehicle is in a non-parking braking state, the sealing rubber ball can be used for plugging the movable cavity by utilizing the gas pressure of the boosting cavity, and gas is prevented from entering a driving braking cavity.
According to the preferable technical scheme, when the sealing rubber ball is located at one end, close to the service braking cavity, of the movable cavity, the stressed driving rod is located in the service braking cavity, the isolation columns are arranged on one side, close to the service braking cavity, of the partition board, on one hand, when gas is injected through the service braking air port, the gas pressure can directly act on the whole diaphragm conveniently, the service braking rod can be pushed quickly to provide service braking force for a vehicle, and on the other hand, when the vehicle is in a non-service braking state, the diaphragm extrudes the stressed driving rod to cause the gas in the power assisting cavity to enter the service braking cavity, and accordingly service braking force is generated in the non-service braking state.
As preferred technical scheme, the spliced eye has been seted up near service brake chamber one end middle part to the parking rubber head, service brake lever is provided with the spliced pole that runs through the diaphragm near diaphragm one end, though the spliced pole runs through the diaphragm, does not influence service brake chamber's leakproofness, and the purpose is in order to make parking brake mechanism when providing parking braking force, can with service brake lever between be connected inseparabler, avoid service brake lever's removal to appear the dislocation, influence parking braking.
As a preferred technical scheme, the elastic force of the energy storage spring is greater than that of the return spring, so that when parking braking is performed, the parking braking mechanism can be used for pushing the service brake rod to move, parking braking force is provided, and meanwhile, the return shaft disc can extrude the stressed driving rod, so that gas in the power assisting cavity can smoothly enter the service brake cavity.
Compared with the prior art, the invention has the beneficial effects that:
1. the sealing adjusting mechanism is arranged, so that the parking braking mechanism cannot move when a vehicle is in a non-parking braking state, and at the moment, the sealing adjusting mechanism can be driven by using the gas pressure in the parking braking cavity to seal a gap between the sealing adjusting seat and the parking braking mechanism, so that the situation that the gas in the parking braking cavity enters the service braking cavity through the gap, and the service braking force is automatically started in a running state to influence the driving safety is avoided.
2. The extrusion assisting inflection point is arranged, so that acting force can be applied to the side wall of the sealing rubber seat when the gap is sealed, the close fit between a plurality of adjacent sealing rubber seats is ensured, and the sealing effect is improved.
3. The parking brake mechanism is arranged, so that gas in the parking brake cavity can enter the power-assisted cavity through the one-way air inlet when the parking brake is not in a parking brake state, the diaphragm and the reset shaft disc can extrude the stressed driving rod along with the movement of the piston rod when the parking brake is started, the sealing rubber ball cannot continuously block the movable cavity, and at the moment, the gas in the power-assisted cavity can enter the service brake cavity, so that greater parking brake force can be provided when the parking brake is in the parking brake state, and the effect of the parking brake is improved.
Drawings
FIG. 1 is a schematic structural diagram of a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 2 is a schematic structural diagram of the interior of a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 3 is a schematic view of the installation position of a seal adjusting mechanism in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 4 is a schematic diagram of the opening position of a stroke accommodating cavity in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 5 is a schematic structural diagram of a seal adjusting mechanism in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 6 is a schematic perspective view of the interior of a seal adjustment mechanism in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 7 is a schematic view of the internal structure of a seal adjusting mechanism in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 8 is a schematic diagram showing the positional relationship between a parking brake mechanism and a service brake lever in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 9 is a schematic structural view of a service brake lever in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 10 is a schematic structural diagram of a parking brake mechanism in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
FIG. 11 is a cross-sectional view of a parking brake mechanism in a spring brake chamber with a gap variation self-adjusting sealing function in accordance with the present invention;
FIG. 12 is a schematic structural diagram of the area A in the spring brake chamber boss 11 with a clearance variation self-adjusting sealing function according to the present invention;
FIG. 13 is a schematic structural view of a parking rubber head in a spring brake chamber with a gap variation self-adjusting sealing function according to the present invention;
reference numbers in the figures: 1. a first housing; 2. a second housing; 3. a piston; 4. a parking brake chamber; 5. a spring cavity; 6. an energy storage spring; 7. a diaphragm; 8. a partition plate; 9. a service brake chamber; 10. a service brake constant pressure chamber; 11. a return spring; 12. a sealing adjusting seat;
13. a seal adjustment mechanism; 1301. a fixed seat; 1302. a stroke chamber; 1303. an air pressure port; 1304. a gas pressure plate; 1305. a travel bar; 13061. a sealing rubber seat; 13062. extruding the cavity; 13063. a pressing plate; 13064. an extrusion assistance inflection point; 13065. a deformation cavity; 1307. a stroke accommodating cavity; 1308. a return spring;
14. a parking brake mechanism; 1401. a piston rod; 1402. a parking tappet; 1403. a power-assisted cavity; 1404. a parking rubber head; 1405. a one-way air inlet; 1406. a main gas supply channel; 1407. a secondary air supply channel; 1408. moving the cavity; 1409. sealing the rubber ball; 1410. a barrier grid plate; 1411. a stressed driving rod; 1412. an isolation column; 1413. inserting holes; 1414. inserting the column;
15. a service brake lever; 16. resetting the shaft disc; 17. a parking brake port; 18. a service brake port; 19. a communication pipe is provided.
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.
Example (b): as shown in fig. 1 to 13, the present invention provides a spring brake air chamber with a gap variation self-adjusting sealing function, the spring brake air chamber includes a first housing 1 and a second housing 2, the first housing 1 and the second housing 2 are connected by a clamp, a partition 8 is disposed at one end of the first housing 1 near the second housing 2, a piston 3 is disposed in the first housing 1, the piston divides the first housing 1 into a parking brake chamber 4 and a spring chamber 5, an energy storage spring 6 is disposed in the spring chamber 5, when parking brake is required, gas in the parking brake chamber 4 is exhausted, the piston 3 moves toward the partition 8 under the action of the energy storage spring 6, a diaphragm 7 is disposed at one end of the second housing 2 near the first housing 1, a service brake chamber 9 is formed between the diaphragm 7 and the partition 8, a service brake constant pressure chamber 10 is formed at the other side of the diaphragm 7, a return spring 11 is arranged in the service brake constant pressure cavity 10, when service braking is needed, gas is injected into the service brake cavity 9, so that the air pressure in the service brake cavity 9 is increased, the diaphragm 7 can move towards the service brake constant pressure cavity 10 and compress the return spring 11, a seal adjusting seat 12 is arranged in the middle of the partition plate 8, a seal adjusting mechanism 13 is arranged on the seal adjusting seat 12, a parking brake mechanism 14 is arranged in the first shell 1 in a penetrating manner, the seal adjusting mechanism 13 is used for sealing a gap between the seal adjusting seat 12 and the parking brake mechanism 14, the condition that the gas in the parking brake cavity 4 enters the service brake cavity 9 through the gap under the normal running state of the vehicle, so that service braking is started and driving safety is influenced, the parking brake mechanism 14 moves towards the service brake cavity 9 under the moving action of the piston 3, a service brake lever 15 is arranged at one end of the service brake constant pressure cavity 10, which penetrates through the second shell 2, during parking braking, the parking braking mechanism 14 moving towards the service braking cavity 9 can drive the service brake lever 15 to move, and further provide parking braking force for the vehicle, during service braking, the parking braking mechanism 14 is not movable, the diaphragm 7 drives the service brake lever 15 to move, service braking force is provided for the vehicle, the service brake lever 15 is provided with a reset shaft disc 16 near one end of the diaphragm 7, the parking braking cavity 4 carries out air intake and exhaust through a parking braking air port 17, the service braking cavity 9 carries out air intake and exhaust through a service braking air port 18, and the spring cavity 5 is connected with the service braking normal pressure cavity 10 through an external communicating pipe 19.
The sealing adjusting mechanism 13 comprises a fixed seat 1301, a stroke cavity 1302, an air pressure port 1303, an air pressure plate 1304, a moving rod 1305, a sealing mechanism, a stroke accommodating cavity 1307 and a return spring 1308;
a plurality of fixed seats 1301 are arranged around the sealing regulation seat 12, a stroke cavity 1302 is arranged inside the fixed seat 1301, an air pressure port 1303 is arranged at the top end of the fixed seat 1301, an air pressure plate 1304 is arranged inside the stroke cavity 1302 in a sliding manner, so that when air is injected into the parking brake cavity 4 through the parking brake port 17, namely, when a vehicle is in a non-parking brake state, the air pressure can extrude the air pressure plate 1304 through the air pressure port 1303, the lower surface of the air pressure plate 1304 is connected with a sealing mechanism through a moving rod 1305, so that when the air pressure plate 1304 is extruded, the sealing mechanism can be pushed by the moving rod 1305 to fill a gap between the sealing regulation seat 12 and the parking brake mechanism 14, the sealing effect is improved, the air inside the parking brake cavity 4 is prevented from entering the service brake cavity 9 through the gap, the service brake is triggered uncontrollably in the vehicle running process, a return spring 1308 is arranged inside the stroke cavity 1302 and below the air pressure plate 1304, when the parking brake is started, the sealing mechanism can be unsealed under the action of the return spring 1308, so that the parking brake mechanism 14 can move normally, a stroke accommodating cavity 1307 is formed in the sealing adjusting seat 12 close to the inner side of the parking brake mechanism 14, and the sealing mechanism moves inside the stroke accommodating cavity 1307 under the driving action of the moving rod 1305.
The sealing mechanism comprises a sealing rubber seat 13061, a squeezing cavity 13062 and a squeezing plate 13063;
the inside extrusion cavity 13062 of having seted up of sealing rubber seat 13061, the carriage release lever 1305 bottom is provided with stripper plate 13063, and stripper plate 13063 is located inside extrusion cavity 13062, and a plurality of sealing mechanism is when sealing the clearance, closely laminates each other.
The parking brake mechanism 14 comprises a piston rod 1401, a parking tappet 1402, an assistance cavity 1403 and a parking rubber head 1404;
one end of the piston rod 1401 close to the sealing adjusting seat 12 is provided with a parking rubber head 1404, one end of the piston rod 1401 is located inside the sealing adjusting seat 12 in a non-parking braking state, the other end of the piston rod 1401 is fixedly provided with a parking tappet 1402, and the inside of the piston rod 1401 is provided with a boosting cavity 1403.
A unidirectional air inlet 1405 penetrating through the boosting cavity 1403 is arranged on the piston rod 1401, so that in a non-parking braking state, air can only enter the boosting cavity 1403 through the parking braking cavity 4, a main air supply channel 1406 is formed in the middle of one end, close to the boosting cavity 1403, of the parking rubber head 1404, a plurality of secondary air supply channels 1407 are formed in one end of the main air supply channel 1406, a moving cavity 1408 penetrating through the parking rubber head 1404 is formed in one end of each secondary air supply channel 1407, a sealing rubber ball 1409 is arranged in the moving cavity 1408, the diameter of each sealing rubber ball 1409 is larger than that of two ends of the moving cavity 1408, and the diameter of each sealing rubber ball 1409 is smaller than that of the middle of the moving cavity 1408, so that when a vehicle is in a non-parking braking state, the sealing rubber ball 1409 can be used for plugging the moving cavity 1408 by using the air pressure of the boosting cavity 1403, and the air is prevented from entering the driving braking cavity 9; the sealing rubber ball 1409 is provided with a stressed driving rod 1411, the stressed driving rod 1411 extends out of the moving cavity 1408 in a non-parking braking state, so that when the vehicle is in a parking braking state, the parking rubber head 1404 can extrude the reset shaft disc 16, at the moment, the stressed driving rod 1411 can be extruded, the sealing rubber ball 1409 can not seal the moving cavity 1408 any more, gas in the boosting cavity 1403 can enter the service braking cavity 9 through the main gas supply channel 1406, the secondary gas supply channel 1407 and the moving cavity 1408, so that greater braking force can be provided for parking braking of the vehicle, the effect of parking braking is more obvious, and the middle part of the moving cavity 1408 is provided with the blocking grid plate 1410.
When the sealing rubber ball 1409 is located inside the movable cavity 1408 and is close to one end of the service brake cavity 9, the stressed driving rod 1411 is located in the service brake cavity 9, the partition plate 8 is provided with a plurality of separation columns 1412 on one side close to the service brake cavity 9, the arrangement of the separation columns 1412 is realized, on one hand, when gas is injected through the service brake air port 18, the pressure of the gas can be more conveniently and directly acted on the whole diaphragm 7, and then the service brake rod 15 can be rapidly pushed to provide service brake force for the vehicle, on the other hand, when the vehicle is prevented from being in a non-service brake state, the diaphragm 7 extrudes the stressed driving rod 1411, the gas inside the boosting cavity 1403 is caused to enter the service brake cavity 9, and the service brake force is generated in the non-service brake state.
The parking rubber head 1404 is close to the middle of one end of the service brake cavity 9 and is provided with a plug hole 1413, one end of the service brake lever 15, which is close to the diaphragm 7, is provided with a plug column 1414 penetrating through the diaphragm 7, although the plug column 1414 penetrates through the diaphragm 7, the sealing performance of the service brake cavity 9 is not affected, the purpose is to enable the parking brake mechanism 14 to be more compact in connection with the service brake lever 15 when providing parking brake force, the dislocation of the movement of the service brake lever 15 is avoided, and the parking brake is affected.
The elastic force of the energy storage spring 6 is greater than the elastic force of the return spring 11, so that when parking braking is performed, the parking braking mechanism 14 can be used to push the service brake lever 15 to move, so as to provide parking braking force, and meanwhile, the return shaft disc 16 can extrude the stressed driving rod 1411, so that gas inside the boosting cavity 1403 can smoothly enter the service brake cavity 9.
The working principle of the invention is as follows: when the spring brake chamber is used, the spring brake chamber is mainly divided into a service brake state and a parking brake state;
when the vehicle is in a non-parking braking state and a non-service braking state, gas is injected into the parking braking cavity 4 through the parking braking air port 17, and gas is exhausted from the service braking cavity 9 through the service braking air port 18;
when a vehicle needs service braking force in the running process, gas is injected into the service braking cavity 9 through the service braking air port 18, so that the gas pressure in the service braking cavity 9 is increased, the diaphragm 7 is extruded under the action of the gas pressure, the diaphragm 7 pushes the reset shaft disc 16 and the service braking rod 15 to move, the reset spring 11 is compressed, and at the moment, the service braking rod 15 extends out of the service braking normal pressure cavity 10 to provide service braking force for the vehicle braking disc;
moreover, when the vehicle is in a running state, a large amount of gas is injected into the parking brake cavity 4 through the parking brake port 17, at this time, the gas pressure inside the parking brake cavity 4 is relatively high, at this time, the gas pressure presses the gas pressure plate 1304 to compress the return spring 1308, at this time, the gas pressure plate 1304 pressed downwards drives the moving rod 1305 to press the sealing rubber seat 13061, so that the sealing rubber seat 13061 moves towards the parking brake mechanism 14 inside the stroke accommodating cavity 1307, the gap between the sealing adjusting seat 12 and the parking brake mechanism 14 is filled and sealed, the gas inside the parking brake cavity 4 is prevented from entering the running brake cavity 9 through the gap between the sealing adjusting seat 12 and the parking brake mechanism 14 when the vehicle is in the running state, and in the process that the pressing plate 13063 presses the sealing rubber seat 13061, under the action of the pressing boosting inflection point 13064, the extrusion plate 13063 can divert the extrusion force to the side wall of the sealing rubber seat 13061, so that the adjacent sealing rubber seats 13061 are attached more tightly;
when the vehicle is in a non-parking braking state, gas in the parking braking cavity 4 enters the boosting cavity 1403 through the one-way air inlet 1405, so that air pressure in the boosting cavity 1403 is increased, at the moment, the gas pressure in the boosting cavity 1403 enables the sealing rubber ball 1409 to plug one end of the moving cavity 1408, at the moment, the stressed driving rod 1411 also extends into the service braking cavity 9, but under the action of the isolating column 1412, the diaphragm 7 and the reset shaft disc 16 cannot extrude the stressed driving rod 1411;
when the vehicle needs to enter a parking brake state, gas in the parking brake chamber 4 and the service brake chamber 9 is exhausted through the parking brake gas port 17 and the service brake gas port 18, at this time, the sealing rubber seat 13061 releases the sealing of the gap under the action of the return spring 1308, the piston 3 moves towards the partition plate 8 under the action of the energy storage spring 6, at this time, the parking rubber head 1404 also moves towards the service brake chamber 9, the partition plate 7 and the return shaft disc 16 extrude the stressed driving rod 1411 along with the contact of the stressed driving rod 1411 and the partition plate 7, at this time, the sealing rubber ball 1409 in the moving cavity 1408 is also extruded, so that the main gas supply channel 1406, the secondary gas supply channel 1407 and the moving cavity 1408 are passively opened, the gas in the boosting cavity 1403 enters the service brake chamber 9, and at this time, a part of acting force can be provided for the parking brake process, the parking braking force is larger, and the parking braking effect is improved;
when the parking brake state needs to be released, gas is injected into the parking brake chamber 4 through the parking brake port 17, gas in the service brake chamber 9 is exhausted through the service brake port 18, and the vehicle can release the parking brake state under the action of the air pressure and the return spring 11.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A spring brake chamber with clearance change self-adjusting sealing function is characterized in that: the spring brake air chamber comprises a first shell (1) and a second shell (2), the first shell (1) is connected with the second shell (2) through a clamping hoop, a partition plate (8) is arranged at one end, close to the second shell (2), of the interior of the first shell (1), a piston (3) is arranged inside the first shell (1), the piston divides the interior of the first shell (1) into a parking brake cavity (4) and a spring cavity (5), an energy storage spring (6) is arranged inside the spring cavity (5), a diaphragm (7) is arranged at one end, close to the first shell (1), of the interior of the second shell (2), a service brake cavity (9) is formed between the diaphragm (7) and the partition plate (8), a service brake normal pressure cavity (10) is formed at the other side of the diaphragm (7), and a reset spring (11) is arranged inside the service brake normal pressure cavity (10), a sealing adjusting seat (12) is arranged in the middle of the partition plate (8), a sealing adjusting mechanism (13) is arranged on the sealing adjusting seat (12), a parking braking mechanism (14) penetrates through the inside of the first shell (1), a service braking lever (15) penetrates through one end of the second shell (2) inside the service braking normal pressure cavity (10), a reset shaft disc (16) is arranged at one end, close to the diaphragm (7), of the service braking lever (15), the parking braking cavity (4) conducts air inlet and exhaust through a parking braking air port (17), the service braking cavity (9) conducts air inlet and exhaust through a service braking air port (18), and the spring cavity (5) is connected with the service braking normal pressure cavity (10) through an external communicating pipe (19);
the sealing adjusting mechanism (13) comprises a fixed seat (1301), a stroke cavity (1302), an air pressure port (1303), an air pressure plate (1304), a moving rod (1305), a sealing mechanism, a stroke accommodating cavity (1307) and a return spring (1308);
a plurality of fixed seats (1301) are installed on the periphery of the sealing adjusting seat (12), a stroke cavity (1302) is formed in each fixed seat (1301), an air pressure port (1303) is formed in the top end of each fixed seat (1301), an air pressure plate (1304) is arranged in each stroke cavity (1302) in a sliding mode, the lower surface of each air pressure plate (1304) is connected with a sealing mechanism through a movable rod (1305), a return spring (1308) is arranged in each stroke cavity (1302) and located below the air pressure plate (1304), a stroke accommodating cavity (1307) is formed in the inner side, close to the parking brake mechanism (14), of each sealing adjusting seat (12), and the sealing mechanisms move in the stroke accommodating cavities (1307) under the driving action of the movable rods (1305);
the sealing mechanism comprises a sealing rubber seat (13061), an extrusion cavity (13062) and an extrusion plate (13063);
the sealing rubber seat (13061) is internally provided with an extrusion cavity (13062), the bottom end of the moving rod (1305) is provided with an extrusion plate (13063), the extrusion plate (13063) is positioned in the extrusion cavity (13062), and a plurality of sealing mechanisms are tightly attached to each other when sealing gaps.
2. A spring brake chamber with gap variation self-adjusting sealing function as claimed in claim 1, wherein: extrusion helping hand inflection points (13064) are arranged at two ends of the interior of the extrusion cavity (13062), two ends of the extrusion plate (13063) are attached to the extrusion helping hand inflection points (13064) mutually, and a deformation cavity (13065) is formed between the extrusion plate (13063) and the bottom of the extrusion cavity (13062).
3. A spring brake chamber with gap variation self-adjusting sealing function as claimed in claim 2, wherein: the parking brake mechanism (14) comprises a piston rod (1401), a parking tappet (1402), a boosting cavity (1403) and a parking rubber head (1404);
the parking brake device is characterized in that a parking rubber head (1404) is arranged at one end, close to the sealing adjusting seat (12), of the piston rod (1401), one end of the piston rod (1401) is located inside the sealing adjusting seat (12) in a non-parking braking state, a parking tappet (1402) is fixedly installed at the other end of the piston rod (1401), and a power assisting cavity (1403) is arranged inside the piston rod (1401).
4. A spring brake chamber with gap variation self-adjusting sealing function according to claim 3, characterized in that: be provided with one-way air inlet (1405) that runs through helping hand cavity (1403) on piston rod (1401), main air feed channel (1406) have been seted up near helping hand cavity (1403) one end middle part in parking rubber head (1404), a plurality of time air feed channel (1407) have been seted up to main air feed channel (1406) one end, removal cavity (1408) that runs through parking rubber head (1404) have been seted up to time air feed channel (1407) one end, it is provided with sealed rubber ball (1409) to remove cavity (1408) inside, be provided with atress actuating lever (1411) on sealed rubber ball (1409), atress actuating lever (1411) stretches out under non-parking braking state and removes cavity (1408), it keeps off grid plate (1410) to remove cavity (1408) middle part is provided with the fender.
5. A spring brake chamber with clearance change self-adjusting sealing function according to claim 4, characterized in that: the diameter of the sealing rubber ball (1409) is larger than the diameter of the two ends of the moving cavity (1408), and the diameter of the sealing rubber ball (1409) is smaller than the diameter of the middle of the moving cavity (1408).
6. A spring brake air chamber with clearance change self-adjusting sealing function as claimed in claim 5, wherein: when the sealing rubber ball (1409) is positioned at one end, close to the service braking cavity (9), of the movable cavity (1408), the stressed driving rod (1411) is positioned in the service braking cavity (9), and a plurality of isolation columns (1412) are arranged on one side, close to the service braking cavity (9), of the partition plate (8).
7. A spring brake air chamber with clearance change self-adjusting sealing function as claimed in claim 6, wherein: the middle part of one end, close to the service brake cavity (9), of the parking rubber head (1404) is provided with an inserting hole (1413), and one end, close to the diaphragm (7), of the service brake lever (15) is provided with an inserting column (1414) penetrating through the diaphragm (7).
8. A spring brake chamber with gap variation self-adjusting sealing function as claimed in claim 7, characterized in that: the elastic force of the energy storage spring (6) is greater than that of the return spring (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210357526.XA CN114439869B (en) | 2022-04-07 | 2022-04-07 | Spring brake chamber with clearance change self-adjusting sealing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210357526.XA CN114439869B (en) | 2022-04-07 | 2022-04-07 | Spring brake chamber with clearance change self-adjusting sealing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114439869A CN114439869A (en) | 2022-05-06 |
| CN114439869B true CN114439869B (en) | 2022-07-01 |
Family
ID=81359568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210357526.XA Active CN114439869B (en) | 2022-04-07 | 2022-04-07 | Spring brake chamber with clearance change self-adjusting sealing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114439869B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117386745B (en) * | 2023-11-30 | 2024-03-19 | 浙江升豪机械有限公司 | Brake air chamber with high air tightness |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201872743U (en) * | 2010-11-16 | 2011-06-22 | 宁波万丰汽车制动器有限公司 | Internal gas-circulating independent discharging type spring brake chamber |
| CN202091411U (en) * | 2011-07-11 | 2011-12-28 | 宜宾三江机械有限责任公司 | Energy-storage piston type spring braking suction and exhaust structure device in air chamber |
| CN207921180U (en) * | 2017-11-24 | 2018-09-28 | 瑞立集团瑞安汽车零部件有限公司 | Commercial car brake chamber with three lip seal structures |
| CN214698911U (en) * | 2020-12-15 | 2021-11-12 | 陕西万安汽车零部件有限公司 | Hydraulic brake cylinder |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1492965A (en) * | 1975-04-22 | 1977-11-23 | Secr Defence | Shaft seals |
| DE19806882A1 (en) * | 1997-12-22 | 1999-07-08 | Hunger Walter Dr Ing E H | Device for the radial pressing of a sealing body |
| JP2000018307A (en) * | 1998-04-27 | 2000-01-18 | Showa Corp | Shaft seal portion fixing structure of hydraulic shock absorber |
| ATE386669T1 (en) * | 2001-10-01 | 2008-03-15 | Knorr Bremse Systeme | SPRING STORAGE CYLINDER |
| US7121191B1 (en) * | 2005-09-01 | 2006-10-17 | Haldex Brake Corporation | Air-operated brake actuator with control valve |
| DE102012110752A1 (en) * | 2012-11-09 | 2014-05-15 | Krones Ag | Device and method for sealing a machine part relative to a second machine part |
| CN203868199U (en) * | 2014-05-04 | 2014-10-08 | 屠伟飞 | Dual-diaphragm brake air chamber with auxiliary parking device |
| KR101539892B1 (en) * | 2014-07-11 | 2015-07-28 | (주)지앤피오토모티브 | Brake Chamber Having Sealing Structure for Internal Air Circulation |
| EP2995518A1 (en) * | 2014-09-11 | 2016-03-16 | Kancioglu Otomotiv Sanayi Ve Ticaret Anonim Sirketi | Universal type spring brake chamber |
| CN106740776A (en) * | 2016-12-27 | 2017-05-31 | 芜湖盛力科技股份有限公司 | A kind of row parking braking combined supercharging device |
| CN207389177U (en) * | 2017-11-13 | 2018-05-22 | 浙江万安科技股份有限公司 | Spring brake cylinder and internal respiration structure |
| US10663025B2 (en) * | 2018-07-31 | 2020-05-26 | Bendix Spicer Foundation Brake Llc | Bushing assembly for a spring brake actuator of a vehicle air braking system |
| CN111457037A (en) * | 2020-04-27 | 2020-07-28 | 浙江万安科技股份有限公司 | Breather valve for spring brake chamber and spring brake chamber |
| CN214036369U (en) * | 2020-12-28 | 2021-08-24 | 盐城荣易达精密机械有限公司 | Piston with full-sealing structure |
| CN214008070U (en) * | 2020-12-29 | 2021-08-20 | 无锡市生丰锻造有限公司 | Oil seal positioning ring for hub oil seal |
| CN214367720U (en) * | 2020-12-31 | 2021-10-08 | 济南鸿德橡塑有限公司 | Sealing ring with strong deformation resistance |
| CN113477168A (en) * | 2021-07-20 | 2021-10-08 | 广州猪猪霞科技有限公司 | Coating production is with sealed effectual agitating unit |
-
2022
- 2022-04-07 CN CN202210357526.XA patent/CN114439869B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201872743U (en) * | 2010-11-16 | 2011-06-22 | 宁波万丰汽车制动器有限公司 | Internal gas-circulating independent discharging type spring brake chamber |
| CN202091411U (en) * | 2011-07-11 | 2011-12-28 | 宜宾三江机械有限责任公司 | Energy-storage piston type spring braking suction and exhaust structure device in air chamber |
| CN207921180U (en) * | 2017-11-24 | 2018-09-28 | 瑞立集团瑞安汽车零部件有限公司 | Commercial car brake chamber with three lip seal structures |
| CN214698911U (en) * | 2020-12-15 | 2021-11-12 | 陕西万安汽车零部件有限公司 | Hydraulic brake cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114439869A (en) | 2022-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114439869B (en) | Spring brake chamber with clearance change self-adjusting sealing function | |
| CN101628577B (en) | Hysteresis characterizing typed electro pedal device | |
| CN112833119B (en) | Manual parking relieving device and parking brake cylinder | |
| CN210434785U (en) | Pressure-adjustable fluid glue injection device | |
| CN210554744U (en) | Brake chamber boosting device and gas-liquid integrated brake system comprising same | |
| CN217540691U (en) | Sealing structure of LED module | |
| CN211642151U (en) | Electric cylinder device with high dynamic characteristic and self-locking at limit position | |
| CN218577718U (en) | Parking braking and service braking integrated braking structure and tractor | |
| CN114475283A (en) | Power supply for new energy automobile | |
| CN113500989B (en) | Electric control exhaust and air supply dual-braking relay valve | |
| CN100404337C (en) | Automobile hydraulic booster | |
| CN117387415A (en) | Pipe end sealing device of heat exchanger for factory tail gas treatment | |
| CN216636454U (en) | High-sealing brake pump | |
| CN201133432Y (en) | Vacuum booster assembly | |
| CN216618553U (en) | Cage type regulating valve sealing structure | |
| CN210484468U (en) | Brake piston for automobile brake system | |
| CN218453365U (en) | Brake master cylinder, brake system and vehicle | |
| CN102431538B (en) | Booster with emergency braking function | |
| CN219883834U (en) | Pedal feel simulation device and brake system | |
| CN217814677U (en) | Brake piston capable of reducing dead volume | |
| CN113738797B (en) | Anti-lock brake device with replaceable brake pad for automobile and implementation method thereof | |
| CN212177723U (en) | Integrated parking braking and service braking's arrestment mechanism | |
| CN2758139Y (en) | Hydraulic brake master pump | |
| CN113830046B (en) | Efficient braking system based on heavy-duty truck and working method thereof | |
| CN211623999U (en) | Two-way hole type clutch sub-pump structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |