• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. Ventilation arrangement for a combined service brake and spring-loaded brake cylinder, particularly for brake arrangements of vehicles, having a piston (9) arranged in the spring-loaded brake cylinder (5) and operable by a loaded spring, whose piston rod (23) is of a hollow design and carries at its front end, which displaceably penetrates the partition (7) between the service brake cylinder and spring-loaded brake cylinder, a thrust piece (29) which, when the brake of the spring-loaded brake cylinder is activated, can act on a piston rod head (35) extending into the service brake cylinder (3) and connected to a braking mechanism, having an aperture (77) opening out of the hollow piston rod into the spring pocket of the spring-loaded brake cylinder, via which aperture the pressure conditions inside the spring pocket (19) are also effective in the hollow piston rod, and having a valve carried by the piston rod and opening and closing the connection between the spring pocket (19) and the pressure chamber (25) of the service brake cylinder (3), characterised in that there is inserted into the thrust piece (29) a pressure reservoir (43, 51) having a predetermined pressure, which is subjected to the pressure inside the hollow piston rod (23) and acts on the valve (59, 61, 63) by means of an operating element (51) movable corresponding to the difference in pressure.
    公开号:SU1099838A3
    申请号:SU802982596
    申请日:1980-09-11
    公开日:1984-06-23
    发明作者:Лехнер Антон
    申请人:Кнорр-Бремзе Гмбх (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a transport machinery industry, in particular to brake cylinders of combined brake systems. Closest to the invention is a combined brake cylinder comprising a housing consisting of an operating braking section and a pneumatic spring energy accumulator section, in the latter of which a piston with a spring and a hollow rod is installed, having a pressure detail on the end facing the operating brake section an intermediate wall mounted for movement through the separating section and intercommunicating with the piston rod of the working brake section connected to the brake mechanism, and Hoists equipped cavity message via a hollow stem with a camera section Pneumosprings energoakkumul torus and connected via a spring loaded valve having a plunger with a locking element through the axial channel and side channels to push the items to the compression chamber of the service brake section lj. However, the well-known cylinder oBl provides insufficient reliability due to the pressure drop in the section of the service brake and the pneumo-spring energy-accumulator. The purpose of the invention is to increase reliability. This goal is achieved by the fact that a reservoir with an elastic wall in contact with the valve pusher is installed in the combined brake cylinder in the cavity of the pressure part, the reservoir is filled with working medium under pressure, and a chamber connected to the hollow rod is formed between the elastic wall and the valve , the valve seat is located at the outlet of the axial channel on the side of the side channels, and the locking element is spring-loaded towards said seat. In this case, the reservoir is formed by a locking collet screwed into the pressure part, the valve seat is made in a washer, the elastic wall is pressed tightly in relation to the specified washer having a central hole, and the valve tappet is passed through one hole through the other condom, and the other condom is placed in the pressure plate. Moreover, a spring plate is installed on the locking element of the valve, between which and the pressure part a spring is installed. FIG. 1 shows schematically a combined brake cylinder, section; in fig. 2 - articulation of the push piece and the hollow stem, section. The casing of the combined brake cylinder consists of a section 1 of the service brake and section 2 of a pneumatic energy accumulator, which are separated from each other by an intermediate wall 3. Inside section 2 there is a moving piston 4, and an accumulator spring 5 adjoins one side of the piston 4. with its opposite side on the base 6 of section 2. In the base 6 there is installed an overpressure valve 7. An inlet opening 8 is inserted in the left (relative to the piston 4 chamber) of FIG. 1, through which the pressure medium is introduced to move the piston 4 while compressing the accumulating spring 5 to the right. During this movement of the piston 4, the air inside the spring chamber 9, in which the accumulation spring 5 is located, is released under pressure through the overpressure valve 7. On the contrary, if the pressure in the compression chamber 10 of the section 2 is released when actuated, the accumulation spring 5 is able to move the piston 4 to the left (Fig. 1). The piston 4 is connected to a hollow rod 11 passing through the intermediate wall 3 into the region of the compression chamber 12 of the section 1. The seal 13 installed in the intermediate wall 3 seals against the outer wall of the rod 11 during its longitudinal movements. The rod 11 carries, at its front, extending into the region of the compression chamber 12, the end of the pressing part 14. In the compression chamber 12 enters an inlet hole 15, through which the pressure medium, therefore compressed air, is admitted to bring the working brake into action. This compressed air acts on the membrane 16 installed inside section 1, on the opposite side is located the head 17 of the rod 18, which extends from the chamber 16 left to the left relative to the membrane 16, section 1 and is in conjunction with. brake mechanism. The part 14 is fixed in a seal at the end of the stem 11, which has a channel 20 inside. The part 14 is screwed using a sealing eperent into the open end of the stem 11 and contains (Fig. 2) an internal cavity into which the closure cap 21 is screwed. the circumference of the locking mechanism 21 is provided respectively at an angular distance from each other of the slits 22 for the passage of air. These slots for the passage of air end with a groove 23 permanently connected to the channel 20 through the slots 22 for the passage of air. The closure cap 21 has, for example, blind holes 24 into which an instrument can be inserted in order to clamp the closure cap relative to the membrane 25. On the opposite side of the membrane 25, a washer 26 is provided, which has a synthetic material or metal, and there are holes 27. The membrane 25 is clamped under atmospheric conditions with the aid of a closure cap 21 ensuring tightness relative to the washer 26 in such a way that the membrane 25 and the closure cap 21 of the chamber 28 are covered with atmospheric pressure. To the left side (Fig. 2) of the diaphragm 25, the pusher 29 abuts, on which the valve closing element 30, for example, made of solid rubber, is screwed to ensure tightness. The element 30 acts relative to the valve seat 31, formed by the end of the hole 32 facing in its direction, passing through the sleeve 26. A spring plate 33 is attached to the left end (FIG. 2) of the element 30, which is clamped by the spring simultaneously supporting the part 14 34. The spring 34 accordingly constantly presses against the element 30, and thus the pusher 29, in order to shift it to the right. The inner region of the part 14 comprising the spring plate 33 includes radial 84 channels 35 located at an angular distance from each other. These channels create a connection in part 14 by chamber 12 of section 11 (Fig. 1) and chamber 36, ti of which is spring 34 and element 30. A chamber 37 is formed between the diaphragm 35 and the washer 26. During normal operating braking, compressed air is injected into the inlet 15 of section 1 in order to move the rod 18 to actuate the brake. The compressed air present inside the compression chamber 12 also acts on the element 30 held by the spring 34 in the closed position relative to the seat 31, i.e. the compressed air cannot in any way enter the chamber 37, which (FIG. 2) adjoins the membrane 25 directly from the left side. During this actuation phase, the element 30 closes the saddle 31 and normal working braking can occur without what is happening loss of pressure. If the spring loaded brake acts as an auxiliary brake (if the service brake fails) or is used as a hundred night brake, the pressure in the compression chamber 10 is reduced by using a valve device (not shown) connected to the inlet 8, that the accumulating spring 5 is able to move the piston 4 (Fig. 1) to the left. Inside the chamber 9, in which the accumulating spring 5 is located, a reduced pressure occurs due to the fact that the volume of the chamber 9 increases during movement to the left (Fig. 1) of pressure 4. During this movement, the pressure inside the compression chamber 12 of section 1 is held predominantly at least equal to atmospheric pressure. The reduced pressure in the spring chamber generated during the movement of the piston 4 is transmitted through the slots 22 to allow air to pass through the grooves 23 and the openings 27 to the chamber 37. Since atmospheric pressure is inside the chamber 28, the membrane 25 is due to the existing pressure difference between the chambers 37 and 28 (Fig 2) it is displaced to the left and at the same time the element 30 and the pusher will mix
    29. The element 30 then rises from the saddle 31, so that a connection is created between the chambers 37 and 36 through the channels 35 with the compression chamber 12.
    Thus, the pressure is equalized, i.e. air enters through the connection from the compression chamber 12 into the chamber 37 and from there through the slots 22 to allow air to pass into the channel 20 until the pressure drop across the membrane 25 in accordance with the filling the air of the spring chamber does not decrease to such an extent that the force of the spring 34 again does not press the element 30 against the seat 31. With the moving ram 11, the element 30 opens and closes against the compression of the spring 34 in the manner described until the desired pressure equalization takes place.
    When the spring loaded brake is lowered, the element 30 remains under the pressure of the spring 34 in the position of fitting with sealing to the saddle 31. The increased pressure created by reducing the volume of the spring chamber 9 due to this decreases in a known manner with the help of the overpressure valve 7 and during this pressure under certain conditions, dust particles also enter the outside air
    The proposed implementation of the brake. Cylinder provides increased reliability of the system as a whole.
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    权利要求:
    Claims (3)
    [1]
    1. COMBINED BRAKE CYLINDER, comprising a housing consisting of a service brake section and a spring-loaded spring accumulator section, the last of which has a piston with a spring and a hollow rod having a pressure part mounted on the end of the service brake section, which is mounted with the possibility of moving through an intermediate section wall and interacting with the piston rod head of the working brake section connected to the brake mechanism, and a cavity communicated through a rod with a chamber of a section of a pneumatic spring energy accumulator and connected by means of a spring-loaded valve having a pusher with a locking element through the axial channel and side channels in the pressure part to the compression chamber of the service brake section, characterized in that, in order to increase reliability, the cavity of the pressure part is installed a reservoir with an elastic wall in contact with the valve follower, the reservoir being filled with a pressurized working medium, a chamber is formed between the elastic wall and the valve constant prices with a hollow stem, a valve seat located at the outlet of the axial passage from the side channels, and the locking member is biased towards said sedla._
    [2]
    2. Cylinder pop. 1, characterized in that the tank is formed by a locking cap screwed into the pressure piece, the valve seat is made in the washer, and the elastic wall is tightly pressed against the specified washer having a Central hole, and the valve follower is passed through the specified hole with one end and the other end placed in the push part.
    [3]
    3. The cylinder according to claim 1, characterized in that a spring plate is installed on the valve shutoff element, between which a spring is installed and the pressing part.
    >
    类似技术:
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    RU2108248C1|1998-04-10|Automobile brake with booster
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    US4309935A|1982-01-12|Two circuit vacuum brake booster
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    US6148711A|2000-11-21|Normally-closed diaphragm check valve
    US3486337A|1969-12-30|Dual master cylinder
    USRE27784E|1973-10-16|Master cylindhi) kok hydraulic: xhakinc, sy.stkm
    HU182199B|1983-12-28|Deaerating device for brake cylinder storing spring force particularly for combined service brake and brake cylinder storing spring force
    同族专利:
    公开号 | 公开日
    EP0025558A1|1981-03-25|
    DE2936899A1|1981-04-02|
    DE2936899C2|1983-01-27|
    EP0025558B1|1983-05-18|
    HU183208B|1984-04-28|
    AT3392T|1983-06-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2868492A|1954-01-25|1959-01-13|Baranoff|Automatic quiet discharge valve|
    FR1599539A|1968-02-29|1970-07-15|
    US3710692A|1971-04-16|1973-01-16|Bendix Westinghouse Automotive|Breathing system for spring brake actuator|
    US3736842A|1972-02-22|1973-06-05|Bendix Corp|Breathing and failure detection system for spring brakes|
    US3800668A|1972-04-03|1974-04-02|Bendix Corp|Breathing and failure detection system for spring brakes|DE8508521U1|1985-03-22|1986-07-17|Robert Bosch Gmbh, 7000 Stuttgart|Membrane cylinder|
    DE3704282A1|1987-02-12|1988-08-25|Wabco Westinghouse Fahrzeug|VENTILATION DEVICE FOR A SPRING-BRAKE CYLINDER|
    EP0554050A1|1992-01-28|1993-08-04|Alliedsignal Limited|Fluid pressure operable actuators|
    CA2138379C|1993-04-27|2005-11-22|William C. Pierce|Spring chamber isolation system for a fluid-operated brake actuator|
    AU683926B2|1994-03-14|1997-11-27|Nai Anchorlok, Inc.|Fluid-operated brake actuator with spring chamber isolation|
    US5722311A|1993-04-27|1998-03-03|Nai Anchorlok, Inc.|Fluid-operated brake actuator with spring chamber isolation|
    US5372059A|1993-04-27|1994-12-13|Nai Anchorlok Inc.|Fluid operated brake actuator with internal valve|
    DE102005035787A1|2005-07-27|2007-02-08|Knorr-Bremse Systeme für Nutzfahrzeuge GmbH|Combined service brake and spring brake cylinder with internal ventilation|
    DE102005047872B3|2005-10-06|2007-04-26|Knorr-Bremse Systeme für Nutzfahrzeuge GmbH|Combined service brake and spring brake cylinder with internal ventilation|
    DE102008061346A1|2008-12-10|2010-06-17|Knorr-Bremse Systeme für Nutzfahrzeuge GmbH|Spring brake cylinder with external venting|
    US8978839B2|2012-05-07|2015-03-17|Haldex Brake Products Corporation|Pneumatic brake actuator with flow insensitive two way control valve|
    DE102012012708B3|2012-06-26|2013-07-04|Wabco Gmbh|Method for producing a combined service brake and spring brake cylinder of a vehicle|
    BR112018073730A2|2016-05-20|2019-02-26|Haldex Brake Products Corporation|spring brake actuator with diaphragm retainer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2936899A|DE2936899C2|1979-09-12|1979-09-12|Bleeding device for a combined service brake and spring brake cylinder|
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