• 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:
    A brake applying device for an internal shoe drum brake and comprising a hydraulic wheel cylinder (11) having pistons (12, 13) operated to apply the brakes by one or both of hydraulic pressure or a wedge assembly (14) that move transversely of the wheel cylinder (11). The wedge assembly has a wedge (16) and rollers (21) which act between the wedge (16) and the pistons (12,13) to facilitate movement of the wedge. The rollers (21) are housed in a cage (22) that can move relative to the wedge (16), the unloaded datum position of the cage (22) on the wedge is determined by two opposed springs (27 and 29) that act on the cage. In order to prevent the cage (22) from becoming damaged during exceptional service conditions it has been arranged for the cage (22) to move relative to the wedge (16) during the initial application of the brakes. This is achieved by providing an abutment (38) which is encountered by the cage (22) during retraction of the wedge (16) so as to compress one of said springs (27).
    公开号:SU1055345A3
    申请号:SU792807709
    申请日:1979-08-31
    公开日:1983-11-15
    发明作者:Канвар Рандхир
    申请人:Аутомоутив Продактс Паблик Лимитед Компани (Фирма)；
    IPC主号:
    专利说明:

    ate
    SAE
    four; The invention relates to mechanical engineering, in particular to drum drives: o-shoe brakes. The most blizzy to the invention is the drive of an arabannr-block-brake, containing a hydraulic cylinder, working pistons with Kliov surfaces, a wedge expanding element with a rod, on which, with the possibility of axial movement, is placed with poJracks, installed between the wedge surfaces of the wedge element and between the parallel wedge surfaces of the working pistons. However, this device is unreliable in operation due to the possible damage of the sleeve by unclamping rollers. . . The aim of the invention is to increase the reliability of the device. The goal is achieved by the fact that in the actuator of the drive drum-shoe brake with internal pads of the wheel-transport means containing installed in the working cavity of the hydraulic cylinder, across the hydraulic cylinder, between the wedge surfaces of the working pistons, there is a wedge clamping element with a rod, on which the possibility of axial movement along kztn & there is a cage with rollers installed between the wedge surfaces of the wedge of the expanding element and Between parallel (1 this surface is the wedge surfaces of the working pistons, two coaxially mounted opposite each other with the possibility of interaction with the spring cage in the working cavity of the hydraulic piston, there is a lug in the form of a collar, and the clip with the rollers is installed with the possibility of interaction of one of its ends with the projection of the hydraulic one. Fig. I shows the executive mechanism for driving the drum-and-submarine brake When the drive is turned on, a longitudinal section; .2 the same, with the drive off. The drive actuator of the drum-shoe brake of a wheel-vehicle consists of hydraulic cylinder 1, in the working cavity of which there are working pistons 2 and 3 with wedge surfaces 4. Opposite The wedge surfaces of the working piston surface interact with the brake shoes of the drum-shoe brake (not shown). The actuator 5 is part of the drive of the drum-shoe brake. It is located in the working cavity 6 of the hydraulic cylinder 1 across the hydraulic cylinder between the wedge surfaces 4 of the working pistons 2 and 3. So that its wedge expansion element in the wedge 7 is coaxial with the bore made in the hydraulic cylinder G. Klin 7 is integral with one end with an emphasis and with another rod 8, which interacts through the piston 9 with a brake spring (not shown) installed above the piston 9. The wedge 7 is filled with suzhakitsim and its thin end is most distant from the piston 9. The wedge surfaces 10 of the wedge are made and installed in the device ve parallel to the wedge surfaces of the working pistons 2 and 3. Between the wedge surfaces to the wedge 7 and the wedge surfaces of the working pistons 2 and 3 are installed rollers 11. THE ROLLERS are placed 3 cages 12 in the guides 13. The cages 14 cages are located on both sides of the wedge 7. In the upper part of the yoke 12 there is a hole designed for the passage of the rod 8. Due to which the yoke 12 can move relative to the wedge 7. In the yoke 12 on each of its section 14, two windows 15 are installed, in which the spring 16 is mounted, covering the rod 8 and coaxial to him, and the ends it is adjacent to the ends of the windows 15. One of. the ends of the spring 16 has the ability to interact with the collar 7 of the wedge 7. The second spring 18 is made 1; more rigid than the spring 16, and is located between the piston 9 and the yoke 12, springing the latter. If the wedge and yoke are in the unloaded condition, then the position of the sleeves 12 relative to the wedge 7 is determined by the equilibrium of the spring 16 acting on the yoke upwards and the spring 18 acting on the yoke down. However, in the initial position, since the spring 16 is stiffer than the spring I8, the collar 17 is located at one of the ends of the window 15. The hydraulic clamp 1 is installed in the housing of the drive 19 connected to the wheel cylinder. The back cavity 20 of the brake drum is sandwiched between the hydraulic block 1 and the brake device, therefore the brake device is in a certain position relative to the rear cavity 20. The internal cavity of the drive body 19 is made stepped, partly part of the working bands and the hydraulic cylinder 1, Step openings 21, 22 n 23 are coaxial with each other and their diameters are reduced from the hydraulic cylinder 1. A protrusion 24 is hydrophilic and 1 is installed in a larger stepped hole 23 of the drive housing 9 and a guide is installed between them. sealing rings 25 made of nylon. In the guide ring, protrusions are made; KOTOpiae prevent movement of the 6th 12 and the wedge 7 in the transverse direction relative to the working cavity of the hydraulic cylinder 1, i.e. transverse to the direction of movement of the wedge 7 Step openings 21 22 form a shoulder 26 in the working cavity 6. A stop 27 is made on the end surface of the wedge 7. The device works as follows. In the off position of the drive, the wedge 7 executes the heping mechanism retracted into the yoke 12, the spring 16 under the action of the wedge 7 is removed, acts and holds the yoke 12. The progrule of the collar 26. When the braking device operates on: driving and driven wheels and the braking is carried out hydraulically, the working pistons 2 and 3 move outwards, while their new surfaces are not in contact with the rollers 11. When the braking device works by relieving air pressure that holds the piston 9 in retracted position, it is under the action of the brake springs The actuator 5 is driven. WED) 7 moves between the wedge surfaces 4, which causes the displacement v of the casing 12 with the rollers across the axis of the hydraulic cylinder 1 until the rollers touch the wedge surfaces 4 working pistons 2 and 3 The further movement of the wedge 7 is related to its interaction with the rollers 11 and it moves faster under the action of a stronger spring 16 than the yoke 12, which travels only half a distance, which is passed by the wedge 7. This movement continues until pistons 2 and 3 brake This drive does its work. If the hydraulic pressure is released, the rollers 11 are pressed against the wedge surfaces 10 against the compression of the brake drums. If the air pressure is increased, the sleeve 12 is held by the rollers 11, and the wedge 7 is withdrawn from it. Effort on wedge surfaces of Yu.menyyyts at OTHOCHTeibs movement of the rollers I1 towards the thin end of the wedge and their slippage. Therefore, when the wedge is removed, only the release of the springs acts on the rollers. The movement of the rollers I and the wedge 7 is limited by the stop 27 with the rollers II slipping over the beveled surfaces 4. The use of the invention will improve the reliability of the device, since the rollers are exerted by the force of the unloaded springs when the drive is turned on, and when the drive is turned off control mechanism.
    P
    ten
    权利要求:
    Claims (2)
    [1]
    No. 1424536- c.T
    [2]
    2 E. J9Z6. .; EXECUTIVE MECHANISM [DRUM AND DRIVE BRAKE DRIVES WITH INNER PADS OF A WHEEL VEHICLE, containing installed in the working cavity of the hydraulic cylinder, across the hydraulic cylinder between the wedge surfaces of the working pistons, the wedge shaft of which has a wedge with a clamping element the wedge surfaces of the wedge of the expanding element and between the wedge surfaces of the working pistons parallel to these surfaces, two but installed opposite each other to engage the clip spring, characterized in that, in order to increase the reliability of the device in the working chamber of the hydraulic cylinder is formed a protrusion in the form of a collar, and a ferrule with rollers mounted to engage one of its ends with a cylinder projection.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1055345A3|1983-11-15|Actuating mechanism of drum-and-shoe brake drive with inner shoes for wheel-mounted vehicle
    US20050205367A1|2005-09-22|Drum brake and brake shoe for one such brake
    EP0070106A1|1983-01-19|Disc brakes
    JPS5786639A|1982-05-29|Hydraulic wheel cylinder assembly of inner shoe drum brake
    US4611691A|1986-09-16|Hydraulic actuator assemblies for vehicle brakes
    EP0087335A1|1983-08-31|Wedge actuated drum brake assembly
    US3726367A|1973-04-10|Combined service and parking brake
    SU1056923A3|1983-11-23|Brake cylinder for vehicle wheel
    EP0260100A1|1988-03-16|Improvements in self-energising disc brakes
    US4067417A|1978-01-10|Self-energizing applied wedge actuator
    US3122222A|1964-02-25|Combination automatic adjuster and deflection absorbing mechanism
    US2965073A|1960-12-20|Fluid motor actuator
    JPS4947219B1|1974-12-14|
    US3118518A|1964-01-21|Internally expanding vehicle brake
    US3647034A|1972-03-07|Floating output wedge with articulated pull rod
    US2084388A|1937-06-22|Brake
    US4543791A|1985-10-01|Power brake unit
    US3874483A|1975-04-01|Automatic adjusters for vehicle brakes
    GB1427521A|1976-03-10|Shoe drum brakes for vehicles
    US3481433A|1969-12-02|Brake with double face clamping and braking system comprising such brakes especially for automobile vehicles
    KR102243281B1|2021-04-22|common breaking device for travelling working vehicle
    US2791296A|1957-05-07|Wheel brake
    SU954284A1|1982-08-30|Vehicle air brake braking cylinder
    SU920292A1|1982-04-15|Brake hydraulic drive control member
    SU1136988A1|1985-01-30|Master brake cylinder
    同族专利:
    公开号 | 公开日
    JPS5538100U|1980-03-11|
    EP0008876B1|1982-06-02|
    US4280603A|1981-07-28|
    ES483783A1|1980-04-16|
    EP0008876A1|1980-03-19|
    DE2963005D1|1982-07-22|
    JPS6015955Y2|1985-05-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1151352A|1965-06-09|1969-05-07|Girling Ltd|Improvements in and relating to Wedge Type Actuators for Vehicle Brakes|
    US3511103A|1968-07-09|1970-05-12|Rockwell Standard Co|Brake mechanism|
    GB1424536A|1972-05-12|1976-02-11|Automotive Prod Co Ltd|Shoe expanding devices for internal shoe drum brakes adjustable speed projector|
    GB1447360A|1972-11-09|1976-08-25|Girling Ltd|Actuators for vehicle brakes|
    GB1447358A|1972-11-09|1976-08-25|Girling Ltd|Actuators for vehicle brakes|
    PL86893B1|1972-11-09|1976-06-30|Girling Ltd Birmingham Warwickshire |DE3230316A1|1982-08-14|1984-02-16|Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt|SPREAD WEDGE ACTUATOR|
    US4666022A|1985-07-01|1987-05-19|Lucas Industries Public Limited Company|Wedge-type brake actuator|
    JPH0546252Y2|1990-04-25|1993-12-03|
    US5248863A|1991-10-01|1993-09-28|Ncr Corporation|Switch actuator mechanism|
    DE19527005A1|1994-09-26|1996-03-28|Koyo Machine Ind Co Ltd|Magnetic screw used for machinery|
    US6460678B1|2000-10-24|2002-10-08|Nexen Group, Inc.|Linear motion brake|
    US7124861B2|2004-02-20|2006-10-24|Nexen Group, Inc.|Motion control apparatus|
    US20070227837A1|2006-03-28|2007-10-04|Akebono Corporation |Wedge roller ramp parking brake assembly|
    TWI438052B|2011-10-17|2014-05-21|Ind Tech Res Inst|Braking device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB7835422|1978-09-02|
    [返回顶部]