CN203868199U - Dual-diaphragm brake air chamber with auxiliary parking device - Google Patents
Dual-diaphragm brake air chamber with auxiliary parking device Download PDFInfo
- Publication number
- CN203868199U CN203868199U CN201420226231.XU CN201420226231U CN203868199U CN 203868199 U CN203868199 U CN 203868199U CN 201420226231 U CN201420226231 U CN 201420226231U CN 203868199 U CN203868199 U CN 203868199U
- Authority
- CN
- China
- Prior art keywords
- chamber
- air chamber
- parking
- valve
- driving
- 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.)
- Expired - Fee Related
Links
Landscapes
- Braking Arrangements (AREA)
Abstract
The utility model discloses a dual-diaphragm brake air chamber with an auxiliary parking device. The dual-diaphragm brake air chamber with the auxiliary parking device comprises a housing, an upper diaphragm and a lower diaphragm, wherein the housing is provided with a running main cavity and a parking main cavity, the upper diaphragm divides the running main cavity into a running auxiliary cavity and a running cavity, and the lower diaphragm divides the parking main cavity into a parking auxiliary cavity and a parking cavity. An auxiliary parking device comprises a valve body, a valve plate installed in a valve cavity, a columnar piston inserted into a valve hole in a sliding mode, an annular piston located in a second air chamber, surrounding the peripheral wall of the columnar piston in a protruding mode and dividing the second air chamber into an air chamber a and an air chamber b, an inner channel arranged inside the columnar piston, a valve seat arranged at the inner wall position in the inner channel close to an air outlet, a valve core matched with the valve seat, a reset spring for driving the valve core to move towards the valve seat, an ejection pin inserted into the air outlet and corresponding to the position the valve core is located, wherein the central position of the valve plate is provided with a valve hole. The auxiliary parking device can solve the problem that force produced during emergent braking and re-braking is insufficient and enables the braking to be slow.
Description
Technical field
The utility model relates to a kind of brake chamber, especially a kind of two diaphragm brake actuators with auxiliary parking device.
Background technique
At present, two diaphragm brake actuators are made up of driving chamber and parking in the form of piston chamber two-part of diaphragm type mostly: driving chamber obtains braking force by inflation, then by vent gas, get back to brake off state by return spring in driving chamber; Parking chamber discharges by energy storage spring and exports braking force, inflates brake off to parking chamber.In Chinese patent, notice of authorization day is on December 1st, 2004, in " closed spring brake chamber " that notice of authorization number is CN2659763Y, a kind of closed spring brake chamber is disclosed, it comprises upper shell, middle body, lower shell body, upper diaphragm, lower diaphragm, upper shell and middle body are combined to form the total chamber of driving, and lower shell body and middle body are combined to form the total chamber of parking; Upper diaphragm is positioned at the total chamber of driving, and driving chamber is separated into two independently drive a vehicle secondary chamber and driving chambeies, and driving chamber is the position near middle body; Lower diaphragm is positioned at the total chamber of parking, and parking chamber is separated into two the independently secondary chamber of parking and parking chambeies, and parking chamber is the position near middle body; On upper shell, be inserted with the push rod extending in the secondary chamber of driving, in the secondary chamber of driving a vehicle, be provided with for driving the driving spring of push rod pushing tow upper diaphragm to the motion of driving chamber; On middle body, be equipped with jack shaft, jack shaft perisporium and middle body are sealed and matched, and the two ends of jack shaft are stretched into respectively in driving chamber and parking chamber, are also provided with for driving the return spring that under jack shaft pushing tow, diaphragm moves to the secondary chamber of parking in parking chamber; On lower shell body, be inserted with the suspension rod extending in the secondary chamber of parking, in the secondary chamber of parking, be also provided with for driving the parking spring of suspension rod pushing tow upper diaphragm to the motion of parking chamber.In the time travelling, in parking chamber, be filled with pressurized air, pressurized air acts on lower diaphragm and is expanded in parking chamber, and jack shaft enters completely in parking chamber under the effect of return spring, now parking spring is subject to the extruding of lower diaphragm and compressed, removes parking braking; While needing parking braking, by emptying air in parking chamber.In the time that vehicle needs to brake in the process of moving, in driving chamber, be filled with pressurized air, pressurized air acts on upper diaphragm and expand in the chamber that makes to drive a vehicle, and upper diaphragm pushing tow push rod output braking force, makes vehicle stop; When service brake need to be removed, only need air in emptying driving chamber.
This pair of diaphragm brake actuator be because of the feature such as simple in structure, small volume, adaptive capacity to environment be stronger, and adopted by numerous auto vendor.But, in the time of emergency braking, the shortcoming such as due to the defect in design, it is slow that it has reaction velocity, and period of braking is long.In addition, when after artic, three bridges are applied, parking spring, for a long time in compressive state, is not brought into play any effect substantially.
Model utility content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of raising reaction velocity, can make parking spring stretch in time, shortens two diaphragm brake actuators of the auxiliary parking device of band of period of braking.
The utility model solves the technological scheme that its technical problem adopts: a kind of two diaphragm brake actuators with auxiliary parking device, comprise housing and be positioned at upper diaphragm and the lower diaphragm of housing, housing is made up of upper shell, middle body and lower shell body, upper shell and middle body are combined to form the total chamber of driving, and lower shell body and middle body are combined to form the total chamber of parking; Upper diaphragm is positioned at the total chamber of driving, and the total chamber of driving is separated into the secondary chamber of driving and driving chamber; Lower diaphragm is positioned at the total chamber of parking, and total parking chamber is separated into the secondary chamber of parking and parking chamber; On upper shell, be inserted with push rod, in the secondary chamber of driving a vehicle, be provided with the driving spring matching with push rod; On middle body, be equipped with jack shaft, the two ends of jack shaft are stretched into respectively in driving chamber and parking chamber, are also provided with the return spring matching with jack shaft in parking chamber; On lower shell body, be inserted with suspension rod, in the secondary chamber of parking, be also provided with match with suspension rod parking spring, described auxiliary parking device includes:
Valve body, is fixed on outside housing, offers valve pocket in valve body;
Valve plate, is installed in valve pocket, and valve pocket is divided into the first air chamber and the second air chamber, and valve plate middle position offers valve opening;
Plunger piston, plunger piston is inserted in valve opening slidably, and the outer wall of plunger piston coordinates with the slipper seal of valve opening inner edge;
Annular piston, is positioned at the second air chamber, and annular piston is convexly set in plunger piston surface, and arranges around plunger piston perisporium, and annular piston coordinates with the second air chamber inwall slipper seal, and the second air chamber is divided into a air chamber and b air chamber;
Internal channel, is opened in plunger piston inside, and this internal channel is with the suction port being conducted with b air chamber and the air outlet being conducted with the first air chamber;
Valve seat, is convexly set in the inwall place near air outlet on internal channel;
Spool, is positioned at internal channel, and suitable with valve seat;
Returnning spring, for driving spool to move towards valve seat;
Thimble, is positioned at the first air chamber, and this thimble is inserted in air outlet, and corresponding with spool position;
Between the first air chamber and parking chamber, be conducted by parking passage, between a air chamber and driving chamber, be conducted by the formation passage of driving a vehicle, on valve body, offer a pore being conducted with a air chamber and the b pore being conducted with b air chamber.
The beneficial effects of the utility model are: a pore connects three-axle relay valve, b pore is directly connected on gas cylinder, annular piston is convexly set in plunger piston surface, in the time that the second air chamber is separated into a air chamber and b air chamber by annular piston, the surface portion of annular piston is grouped into the inwall of a air chamber, and a air chamber inwall being formed by annular piston surface is a face; Part forms the inwall of b air chamber, and the b air chamber inwall being formed by annular piston surface is b face; A face and b face are symmetrically located at annular piston both sides.Under conventional state, b air chamber is by internal channel suction port and the inner on state that keeps of internal channel, and the spool that is positioned at internal channel is subject to action of reset spring and compresses valve seat, make between the enterprising gas port of internal channel and air outlet isolation mutually, between b air chamber and the first air chamber in isolation.In the time being filled with pressurized gas in b air chamber, b face is subject to gas pressure and moves towards a air chamber place direction, thimble inserts in the air outlet of plunger piston thereupon gradually simultaneously, now spool is subject to action of reset spring and top pressure valve seat, until thimble pushing tow spool, and spool and valve seat are separated, be that passage between b air chamber and the first air chamber is opened, pressurized gas in b air chamber enter the first air chamber by internal channel, then enter parking chamber by parking passage, after the inflation of parking chamber, extruding parking spring is to minimum point, jack shaft is return under return spring effect, it is now driving states, remove parking braking.When brake, three-axle relay valve distribution is filled with pressurized gas from a pore in a air chamber, a face is subject to gas pressure and moves towards a air chamber place direction, thimble exits the air outlet of plunger piston thereupon gradually simultaneously, now spool is subject to action of reset spring and close valve seat, until top is pressed on valve seat, realize the partition of internal channel, the passage between b air chamber and the first air chamber is cut off; Pressurized gas in parking chamber are bled off, and gas cylinder flows to the pressurized gas in parking chamber and is closed at spool and valve seat place, parking spring stretches, thereby helps brake.The gas pressure entering when gas cylinder place is when maximum, the brake operating air pressure of the first air chamber will reach 6 more than barometric pressure, could effectively promote annular piston and carry out exhaust, the air pressure of a face is connected with driving chamber, that is to say, while only having brake to certain dynamics, annular piston just can be worked, can ensure not waste like this source of the gas, and retain fine gauze, rub stopping property.Brake finishes, and the pressure of a face is removed, and on annular piston, b face is subject to conventional gas to promote to move from trend a air chamber direction, thus the sealing of opening spool and valve base chamber, and pressurized gas enter in parking chamber, by lower diaphragm compression parking spring, remove brake.By such scheme, the dynamics deficiency that auxiliary parking device occurs can alleviate emergency brake, heavy brake time, brakes slow problem, and parking spring stretches, and props up jack shaft, and immediate roof is lived in diaphragm and promoted push rod power-assisted, and its effect directly effectively; Then, when parking, hold parking brake switch, moved and braked by upper diaphragm, parking spring stretches and helps brake, greatly reduces the possibility that car slides; Simultaneously, when brake, brake basin and brake rubber block generate heat rubbing energetically, brake rubber block surface can form the very sliding carbide of one deck, the friction factor of brake rubber block is reduced, now, by the supernatural power of shock again of parking spring, can play certain effect of vibration, the carbide covering on brake rubber block surface is shaken off, ensure that brake rubber block maintains normal brake ability; Finally, in the time of continuous descending, brake continually, gas cylinder air pressure can decline thereupon, and on annular piston, the pressure of b face also declines thereupon, and parking spring is followed the servobrake that carries out that the instruction meeting of brake shifts to an earlier date more, shortens stopping distance.
Because a face on annular piston and b face are the acting surfaces during as atmospheric pressure pushing tow, in the situation that pressure is identical, atmospheric pressure is made the direction of used time and angle and directly affects the stressed size of a face and b face, be reaction velocity and the reaction effect of annular piston, therefore annular piston is vertically convexly set on plunger piston perisporium.
Tradition spool and valve base chamber are mainly by being firmly sealed and matched, realizing valve cuts off, but the sealing effect of this structure is not fine, therefore, on spool, the end corresponding with valve seat is provided with the rubber sheet gasket for sealing, also be that spool seals by the rubber sheet gasket and the valve seat that carry, the sealing effect that this structure is brought is better.
In conventional art, sealing between plunger piston and valve opening and annular piston and the second air chamber all adopts hard sealing, and there is many deficiencys in the sealing effect of this kind of mode, therefore, between plunger piston and valve opening and between annular piston and the second air chamber, be equipped with O-ring seal, the sealing effect that this structure is brought is better.
Position relative with plunger piston on valve body offers screw, and described auxiliary parking device also comprises the adjusting bolt for pushing tow plunger piston, and this adjusting bolt is installed in screw, and suitable with screw.By adjusting bolt, can realize precession or the back-out of adjusting bolt along screw axis, and the turnover of adjusting bolt regulates, will change the working stroke of plunger piston, thereby the turnover tolerance of a pore and b pore is regulated.In addition, if by adjusting bolt be threaded to bottom, be also plunger piston to the leftmost side, between the first air chamber, internal channel and b air chamber in normally open.By controlling gas cylinder, gas cylinder inner high voltage gas can directly enter in parking chamber by b pore, and three-axle relay valve itself directly enters a air chamber and driving chamber by a pore, now the function of auxiliary parking device is cancelled, the utility model is just equivalent to traditional two diaphragm brake actuators, thereby realize the switching of new function and old function, be applicable to dissimilar vehicle.
Owing to realizing and being sealed and matched by hard sealing or O-ring seal when the contact between many parts in valve pocket, this structure can not ensure that pressurized gas very seal, due to problems such as aging or cooperation imprecisions, more or less there will be leakage phenomenon, if and these gases accumulate and do not discharge, can affect overall normal work.Therefore in thimble, spool, plunger piston and adjusting bolt, offer respectively exhaust passage, each exhaust passage is located along the same line, and ensures that the high pressure air physical efficiency of internal leakage is discharged from exhaust passage.
Can accomplish tight cooperation when ensureing adjusting bolt pushing tow plunger piston, therefore in adjusting bolt, be provided with positioning seat for the end of pushing tow plunger piston, on this positioning seat, convex with plunger piston on the suitable positioning table of exhaust passage internal diameter.In the time of adjusting bolt pushing tow plunger piston, on positioning seat, positioning table directly heads in exhaust passage, realizes the accurate location of plunger piston.
Because two diaphragm brake actuators in use can vibrate, therefore adjusting bolt in use may be shifted because of vibration, so when adjusting bolt runs through screw, and when adjusting bolt part extends to valve body and forms locking end outward, on this locking end, be arranged with suitable lock-nut.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment brake chamber.
Fig. 2 is the structural representation of the auxiliary parking device of the utility model embodiment.
Fig. 3 is the structural representation of the utility model embodiment valve body.
Fig. 4 is the erection drawing of the utility model embodiment plunger piston, annular piston and spool.
Fig. 5 is the structural representation of the utility model embodiment plunger piston.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Fig. 1～5, the present embodiment comprises housing 1 and is positioned at upper diaphragm 21 and the lower diaphragm 22 of housing 1, housing 1 is made up of upper shell 11, middle body 12 and lower shell body 13, and upper shell 11 and middle body 12 are combined to form the total chamber 31 of driving, and lower shell body 13 and middle body 12 are combined to form the total chamber 32 of parking; Upper diaphragm 21 is positioned at the total chamber 31 of driving, and the total chamber 31 of driving is separated into the secondary chamber 311 of driving and driving chamber 312 (Fig. 1 middle rolling car chamber 312, because upper diaphragm 21 cannot directly show with the close contact of middle body 12, is a wire); Lower diaphragm 22 is positioned at the total chamber 32 of parking, and total parking chamber 32 is separated into the secondary chamber 321 of parking and parking chamber 322; On upper shell 11, be inserted with push rod 4, in the secondary chamber 311 of driving a vehicle, be provided with the driving spring 411 matching with push rod 41; On middle body 12, be equipped with jack shaft 42, the two ends of jack shaft 42 are stretched into respectively in driving chamber 312 and parking chamber 322, are also provided with the return spring 421 matching with jack shaft 42 in parking chamber 322; On lower shell body 13, be inserted with suspension rod 43, in the secondary chamber 321 of parking, be also provided with match with suspension rod 43 parking spring 431.On housing 1, be also fixed with auxiliary parking device 5, auxiliary parking device 5 comprises the valve body 51 being fixed on outside housing 1, offers a columned valve pocket 511 in this valve body 51; Valve plate 52 is installed in valve pocket 511, and valve plate 52 place planes are perpendicular to valve pocket 511 axis settings, and valve pocket 511 is divided into the first air chamber 5111 and the second air chamber 5112 by valve plate 52, and the central position of valve plate 52 offers a valve opening 521; In valve opening 521, be equipped with slidably plunger piston 53, the outer wall of this plunger piston 53 coordinates with valve opening 521 inwall slipper seals; The surface that is positioned at the second air chamber 5112 on plunger piston 53 convexes with annular piston 54, this annular piston 54 is around plunger piston 53 perisporium settings, annular piston 54 place planes are perpendicular to the axis setting of plunger piston 53, the outer rim of annular piston 54 coordinates with the second air chamber 5112 inwall slipper seals, and the second air chamber 5112 is separated into a air chamber 51121 and b air chamber 51122; Inside at plunger piston 53 also offers internal channel 531, and this internal channel 531 is with the suction port 5311 being conducted with b air chamber 51122 and the air outlet 5312 being conducted with the first air chamber 5111; Inwall place near air outlet 5311 on internal channel 531 convexes with valve seat 55; In internal channel 531, be also provided with the spool 56 suitable with valve seat 55; On spool 56, be also provided with Returnning spring 57, this Returnning spring 57 is for driving spool 56 to move towards valve seat 55, and then realizes the sealing between spool 56 and valve seat 55; In the first air chamber 5111, be also provided with thimble 58, thimble 58 is inserted in air outlet 5312, and corresponding with spool 56 positions, and this correspondence refers to, and in the time of spool 56 unlimited close thimble 58, thimble 58 is by conflict spool 56, thus the movement of restriction spool 56; Between the first air chamber 5111 and parking chamber 322, (do not draw by parking passage, in accompanying drawing, only show the access portal of parking passage at the first air chamber 5111 places) be conducted, between a air chamber 51121 and driving chamber 311, do not draw by the formation passage of driving a vehicle, in accompanying drawing, only show the access portal of parking passage at a air chamber 51121 places) be conducted, on valve body 51, offer a pore 512 being conducted with a air chamber 51121 and the b pore 513 being conducted with b air chamber 51122.A pore 512 connects three-axle relay valve, b pore 513 is directly connected on gas cylinder, annular piston 54 is convexly set in plunger piston 53 surfaces, in the time that the second air chamber 5112 is separated into a air chamber 51121 and b air chamber 51122 by annular piston 54, the surface portion of annular piston 54 is grouped into the inwall of a air chamber 51121, and a air chamber 51121 inwalls that formed by annular piston 54 surfaces are a face 541; The surface portion of annular piston 54 is grouped into the inwall of b air chamber 51122, and b air chamber 51122 inwalls that formed by annular piston 54 surfaces are b face 542; A face 541 and b face 542 are symmetrically located at annular piston 54 both sides.
On valve body 51, the position relative with plunger piston 53 offers screw 514, and auxiliary parking device 5 also comprises the adjusting bolt 6 for pushing tow plunger piston 53, and this adjusting bolt 6 is installed in screw 514, and suitable with screw 514.By adjusting bolt 6, can realize precession or the back-out of adjusting bolt 6 along screw 514 axis, and the turnover of adjusting bolt 6 regulates, will change the working stroke of plunger piston 53, thereby the turnover tolerance of a pore 512 and b pore 513 is regulated.In addition, if by adjusting bolt 6 be threaded to bottom, be also that plunger piston 53 is subject to pushing tow to the leftmost side, between the first air chamber 5111, internal channel 531 and b air chamber 51122 in normally open.By controlling gas cylinder, gas cylinder inner high voltage gas can directly enter in parking chamber 322 by b pore 513, and three-axle relay valve itself directly enters a air chamber 51121 and driving chamber 312 by a pore 512, now the function of auxiliary parking device 5 is cancelled, the utility model is just equivalent to traditional two diaphragm brake actuators, thereby realize the switching of new function and old function, be applicable to dissimilar vehicle.On spool 56, the end corresponding with valve seat 55 is provided with the rubber sheet gasket 561 for sealing, and between plunger piston 53 and valve opening 521 and between annular piston 54 and the second air chamber 5112, is being equipped with O-ring seal, and the sealing effect that this structure is brought is better.
During due to contact between the interior many parts of valve pocket 511, realize and being sealed and matched by hard sealing or O-ring seal, this structure can not ensure that pressurized gas very seal, due to problems such as aging or cooperation imprecisions, more or less there will be leakage phenomenon, if and these gases accumulate and do not discharge, can affect overall normal work.Therefore in thimble 58, spool 56, plunger piston 53 and adjusting bolt 6, offer respectively exhaust passage 7, each exhaust passage 7 is located along the same line, if have high pressure gas leakage in the first air chamber 5111 and the second air chamber 5112, these gases can directly enter in each exhaust passage 7, and drain into outside by exhaust passage 7, thereby ensure inner pressure security.Can accomplish tight cooperation when ensureing adjusting bolt 6 pushing tow plunger piston 53, therefore in adjusting bolt 6, be provided with positioning seat 61 for the end of pushing tow plunger piston 53, on this positioning seat 61, convex with plunger piston 53 on the suitable positioning table 62 of exhaust passage 7 internal diameters.In the time of adjusting bolt 6 pushing tow plunger piston 53, on positioning seat 61, positioning table 62 directly heads in exhaust passage 7, realizes the accurate location of plunger piston 53.Because two diaphragm brake actuators in use can vibrate, therefore adjusting bolt 6 in use may be shifted because of vibration, so when adjusting bolt 6 runs through screw 514, and when adjusting bolt 6 parts extend to the outer formation locking of valve body 51 end, on this locking end, be arranged with suitable lock-nut 63.
Under conventional state, b air chamber 5112 is by the inner on state that keeps of internal channel 531 suction ports 5311 and internal channel 531, and the spool 56 that is positioned at internal channel 531 is acted on by Returnning spring 57 and compress valve seat 55, make between the enterprising gas port 5311 of internal channel 531 and air outlet 5312 isolation mutually, between b air chamber 5112 and the first air chamber 5111 in isolation.In the time being filled with pressurized gas in b air chamber 5112, b face 542 is subject to gas pressure and moves towards a air chamber 5111 place directions, thimble 58 inserts in internal channel 531 air outlets 5312 on plunger piston 53 thereupon gradually simultaneously, now spool 56 is acted on and top pressure valve seat 55 by Returnning spring 57, until thimble 58 pushing tow spools 56, and spool 56 and valve seat 55 are separated, be that passage between b air chamber 51122 and the first air chamber 5111 is opened, pressurized gas in b air chamber 51122 enter the first air chamber 5111 by internal channel 531, then enter parking chamber 322 by parking passage, after 322 inflations of parking chamber, extruding parking spring 431 is to minimum point, jack shaft 42 is return under return spring 421 effects, it is now driving states, remove parking braking.When brake, three-axle relay valve distribution is filled with pressurized gas from a pore 512 in a air chamber 5111, a face 541 is subject to gas pressure and moves towards a air chamber 5111 place directions, thimble 58 exits internal channel 531 air outlets 5312 of plunger piston 53 thereupon gradually simultaneously, now spool 56 is acted on by Returnning spring 57 and close valve seat 55, until top is pressed on valve seat 55, realize the partition of internal channel 531, the passage between b air chamber 51122 and the first air chamber 5111 is cut off; Pressurized gas in parking chamber 322 are bled off, and gas cylinder flows to the pressurized gas in parking chamber 322 and is closed at spool 56 and valve seat 55 places, parking spring 431 stretches, thereby helps brake.The gas pressure entering when gas cylinder place is when maximum, the brake operating air pressure of the first air chamber 5111 will reach 6 more than barometric pressure, could effectively promote annular piston 54 and carry out exhaust, the air pressure of a face 541 is connected with driving chamber 312, that is to say, while only having brake to certain dynamics, annular piston 54 just can be worked, can ensure not waste like this source of the gas, and retain fine gauze, rub stopping property.Brake finishes, and the pressure of a face 541 is removed, and on annular piston 54, b face 542 is subject to conventional gas to promote to move from trend a air chamber 51121 directions, thereby open the sealing between spool 56 and valve seat 55, pressurized gas enter in parking chamber 322, compress parking spring 431 by lower diaphragm 22, remove brake.By such scheme, the dynamics deficiency that auxiliary parking device 5 occurs can alleviate emergency brake, heavy brake time, brakes slow problem, and parking spring 431 stretches, and props up jack shaft 42, and immediate roof is lived in diaphragm 21 and promoted push rod 41 power-assisteds, and its effect directly effectively; Then, when parking, hold parking brake switch, moved and braked by upper diaphragm 21, parking spring 431 stretches and helps brake, greatly reduces the possibility that car slides; Simultaneously, when brake, brake basin and brake rubber block generate heat rubbing energetically, brake rubber block surface can form the very sliding carbide of one deck, the friction factor of brake rubber block is reduced, now, by the supernatural power of shock again of parking spring 431, can play certain effect of vibration, the carbide covering on brake rubber block surface is shaken off, ensure that brake rubber block maintains normal brake ability; Finally, in the time of continuous descending, brake continually, gas cylinder air pressure can decline thereupon, and on annular piston 54, the pressure of b face 542 also declines thereupon, and parking spring 431 is followed the servobrake that carries out that the instruction meeting of brake shifts to an earlier date more, shortens stopping distance.
Claims (8)
1. two diaphragm brake actuators of the auxiliary parking device of band, comprise housing and be positioned at upper diaphragm and the lower diaphragm of housing, housing is made up of upper shell, middle body and lower shell body, and upper shell and middle body are combined to form the total chamber of driving, and lower shell body and middle body are combined to form the total chamber of parking; Upper diaphragm is positioned at the total chamber of driving, and the total chamber of driving is separated into the secondary chamber of driving and driving chamber; Lower diaphragm is positioned at the total chamber of parking, and total parking chamber is separated into the secondary chamber of parking and parking chamber; On upper shell, be inserted with push rod, in the secondary chamber of driving a vehicle, be provided with the driving spring matching with push rod; On middle body, be equipped with jack shaft, the two ends of jack shaft are stretched into respectively in driving chamber and parking chamber, are also provided with the return spring matching with jack shaft in parking chamber; On lower shell body, be inserted with suspension rod, in the secondary chamber of parking, be also provided with match with suspension rod parking spring, it is characterized in that, described auxiliary parking device includes:
Valve body, is fixed on outside housing, offers valve pocket in valve body;
Valve plate, is installed in valve pocket, and valve pocket is divided into the first air chamber and the second air chamber, and valve plate middle position offers valve opening;
Plunger piston, plunger piston is inserted in valve opening slidably, and the outer wall of plunger piston coordinates with the slipper seal of valve opening inner edge;
Annular piston, is positioned at the second air chamber, and annular piston is convexly set in plunger piston surface, and arranges around plunger piston perisporium, and annular piston coordinates with the second air chamber inwall slipper seal, and the second air chamber is divided into a air chamber and b air chamber;
Internal channel, is opened in plunger piston inside, and this internal channel is with the suction port being conducted with b air chamber and the air outlet being conducted with the first air chamber;
Valve seat, is convexly set in the inwall place near air outlet on internal channel;
Spool, is positioned at internal channel, and suitable with valve seat;
Returnning spring, for driving spool to move towards valve seat;
Thimble, is positioned at the first air chamber, and this thimble is inserted in air outlet, and corresponding with spool position;
Between the first air chamber and parking chamber, be conducted by parking passage, between a air chamber and driving chamber, be conducted by the formation passage of driving a vehicle, on valve body, offer a pore being conducted with a air chamber and the b pore being conducted with b air chamber.
2. two diaphragm brake actuators of the auxiliary parking device of band according to claim 1, is characterized in that: described annular piston is vertically convexly set on plunger piston perisporium.
3. two diaphragm brake actuators of the auxiliary parking device of band according to claim 2, is characterized in that: on described spool, the end corresponding with valve seat is provided with the rubber sheet gasket for sealing.
4. two diaphragm brake actuators of the auxiliary parking device of band according to claim 3, is characterized in that: between described plunger piston and valve opening and between annular piston and the second air chamber, be equipped with O-ring seal.
5. two diaphragm brake actuators of the auxiliary parking device of band according to claim 1, it is characterized in that: position relative with plunger piston on described valve body offers screw, described auxiliary parking device also comprises the adjusting bolt for pushing tow plunger piston, this adjusting bolt is installed in screw, and suitable with screw.
6. two diaphragm brake actuators of the auxiliary parking device of band according to claim 5, is characterized in that: in described thimble, spool, plunger piston and adjusting bolt, offer respectively exhaust passage, each exhaust passage is located along the same line.
7. two diaphragm brake actuators of the auxiliary parking device of band according to claim 6, it is characterized in that: in described adjusting bolt, be provided with positioning seat for the end of pushing tow plunger piston, on this positioning seat, convex with plunger piston on the suitable positioning table of exhaust passage internal diameter.
8. two diaphragm brake actuators of the auxiliary parking device of band according to claim 7, is characterized in that: described adjusting bolt runs through screw, and adjusting bolt part extends to valve body and form locking end outward, on this locking end, are arranged with suitable lock-nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420226231.XU CN203868199U (en) | 2014-05-04 | 2014-05-04 | Dual-diaphragm brake air chamber with auxiliary parking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420226231.XU CN203868199U (en) | 2014-05-04 | 2014-05-04 | Dual-diaphragm brake air chamber with auxiliary parking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203868199U true CN203868199U (en) | 2014-10-08 |
Family
ID=51649156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420226231.XU Expired - Fee Related CN203868199U (en) | 2014-05-04 | 2014-05-04 | Dual-diaphragm brake air chamber with auxiliary parking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203868199U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446336A (en) * | 2021-06-30 | 2021-09-28 | 采埃孚商用车系统(青岛)有限公司 | Double-piston spring brake air chamber |
| CN114439869A (en) * | 2022-04-07 | 2022-05-06 | 江苏恒鑫正宏科技有限公司 | Spring brake chamber with clearance change self-adjusting sealing function |
-
2014
- 2014-05-04 CN CN201420226231.XU patent/CN203868199U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446336A (en) * | 2021-06-30 | 2021-09-28 | 采埃孚商用车系统(青岛)有限公司 | Double-piston spring brake air chamber |
| CN114439869A (en) * | 2022-04-07 | 2022-05-06 | 江苏恒鑫正宏科技有限公司 | Spring brake chamber with clearance change self-adjusting sealing function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101725652B (en) | Slip seal diaphragm for spring brake actuator | |
| CN203868199U (en) | Dual-diaphragm brake air chamber with auxiliary parking device | |
| EP3168100B1 (en) | Brake actuator having sealing structure for inside air circulation | |
| CN204458933U (en) | With the cyclostrophic liquid type brake clamp unit of stopping brake | |
| CN102011819A (en) | Brake air chamber, brake system comprising same and motor vehicle | |
| CN114834421B (en) | Air control valve | |
| CN107017117B (en) | A kind of pneumatic operation system for motor-car vacuum circuit breaker | |
| US8256341B2 (en) | Air brake diaphragms | |
| CN206774449U (en) | A kind of pneumatic operation system for motor-car vacuum circuit breaker | |
| CN114802159B (en) | Emergency valve | |
| CN115214585B (en) | Air control valve | |
| CN106627542B (en) | Multi-channel rubber cylinder sealing distribution valve | |
| CN205523860U (en) | Electric automobile's air spring strutting arrangement | |
| CN202024073U (en) | Gas bottle for high-pressure gas storage | |
| CN201884528U (en) | Brake chamber, brake system including brake chamber, and motor vehicle comprising brake system | |
| CN202169938U (en) | Pressure-adjusting three-way valve and boosting relay valve composed of pressure-adjusting three-way valve and relay valve | |
| CN2587729Y (en) | Relay valve for vehicle | |
| WO2016019865A1 (en) | Superposition-preventing valve, brake cylinder assembly having same, and brake control method thereof | |
| CN204399197U (en) | Cyclostrophic liquid type brake clamp unit | |
| CN114802160B (en) | Air control valve with acceleration relieving function | |
| CN202531854U (en) | Bottle head valve | |
| CN203623656U (en) | Cushion valve on brake system | |
| EP4180288A1 (en) | Pressure braking device, braking system and rail vehicle | |
| CN217598544U (en) | Pressure increasing valve | |
| CN216382013U (en) | Pressure system of semiconductor bonding equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20150504 |
|
| EXPY | Termination of patent right or utility model |