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公开(公告)号：US3666060A
公开(公告)日：1972-05-30
申请号：US3666060D
申请日：1970-11-25
申请人： HANS O SCHROTER
发明人： SCHROTER HANS O
摘要： A wheel brake mechanism on a trailer has a brake shoe support mounted for limited tangential movement with respect to the wheel axle but restrained against movement during forward movement of the trailer vehicle by an abutment mounted on the frame of the vehicle. An auxiliary rod linkage interconnects the brake shoe support to the service rod linkage which is operated during ordinary or service braking applications to apply an actuating force to the brake shoes of the trailer wheel brake mechanism. During rearward movement of the trailer vehicle the brake shoe support may move sufficiently to cause the auxiliary rod linkage to exert a counteracting force on the service rod linkage. A parking brake comprising a pivotally mounted operating lever has a locking lever thereon which locks the auxiliary rod linkage against movement when the operating lever is moved in the braking direction but which is unlocked from the auxiliary rod linkage when the operating lever is in the release position.
摘要翻译： 拖车上的车轮制动机构具有安装成相对于车轮轴进行有限的切向运动的制动蹄支撑件，但是通过安装在车辆的车架上的支座在拖车车辆向前移动期间被限制。 辅助杆连杆将制动蹄支撑件与在常规或制动应用期间操作的操作杆联动装置相互连接，以将动作力施加到拖车车轮制动机构的制动蹄。 在拖车车辆的向后运动期间，制动蹄支撑件可以充分移动，以使辅助杆连杆在作用杆连杆上施加抵消力。 包括枢转安装的操作杆的驻车制动器在其上具有锁定杆，当操作杆在制动方向上移动时，当操作杆处于释放位置时，辅助杆联动装置锁定辅助杆联动装置以防止移动 。
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公开(公告)号：US2973839A
公开(公告)日：1961-03-07
申请号：US72843958
申请日：1958-04-14
申请人： DICO CORP
发明人： DE PUYDT FRANK A , SILVER ROGER C
CPC分类号： F16D51/52 , B60T7/206 , B60T11/107
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公开(公告)号：US4787487A
公开(公告)日：1988-11-29
申请号：US55235
申请日：1987-05-28
申请人： Eugene P. Conradi
发明人： Eugene P. Conradi
摘要： An improved surge braking mechanism for trailer vehicles including a brake shoe carried on a lever plate by an articulated linkage system. The braking mechanism moves the lever plate to bring the brake shoe into braking engagement with a brake drum of the trailer vehicle in response to the forward inertia of the trailer vehicle during braking. When the inertia of the trailer vehicle is either neutral or rearward, the braking mechansim acts to take the brake shoe out of braking engagement with the brake drum. The articulated linkage system limits the movement of the brake shoe away from the brake drum during rearward movement of the trailer vehicle. Upon transitional motion of the brake shoe in response to forward movement of the trailer vehicle, the brake shoe is smoothly returned to its normal position ready for braking of such forward movement. Undesired temporary braking engagement of the brake shoe observed during such transitional movement in known surge braking mechanisms is thereby prevented.
摘要翻译： 一种用于拖车的改进的喘振制动机构，包括通过铰接式连杆系统在杠杆板上承载的制动瓦。 制动机构响应于制动期间拖车的前进惯性，使闸板移动以使制动蹄与拖车的制动鼓制动接合。 当拖车的惯性为中性或后方时，制动机构用于将制动蹄与制动鼓制动接合。 铰接式联动系统在拖车车辆向后运动期间将制动蹄的运动限制在制动鼓之外。 当制动蹄响应拖车的向前移动而进行过渡运动时，制动蹄平稳地返回到其正常位置，准备制动这种向前的动作。 由此防止了在已知的浪涌制动机构中的这种过渡运动期间观察到的制动蹄的不期望的临时制动接合。
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公开(公告)号：US3814218A
公开(公告)日：1974-06-04
申请号：US25109272
申请日：1972-05-08
申请人： MERZ H
发明人： MERZ H
IPC分类号： B60T7/20
CPC分类号： B60T7/206
摘要： A mechanical overrunning braking system for trailers has main and auxiliary braking units which are mounted on the towed vehicle, at least two wheel brakes on the trailer, and cables or rods connecting the spreading levers or toggle leverages of the wheel brakes with the two units. Each wheel brake has two brake shoes one of which acts as a primary shoe in response to operation of one of the braking units while the brake drum rotates forwardly and the other of which acts as a primary shoe in response to operation of one of the braking units while the drum rotates rearwardly. A package of prestressed dished springs can be deformed only in response to operation of the auxiliary braking unit to thereby force the other shoe into frictional engagement with the drum. The characteristic curve of the springs is degressive or regressive, at least in the region corresponding to stressing of such springs beyond the initial stress. A force limiting device is installed between the main braking unit and the cables or rods to prevent the main braking unit from furnishing to the cables or drums a force which is sufficient to effect a deformation of springs to the extent which is necessary to move the other shoe into engagement with the brake drum.
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公开(公告)号：US4603763A
公开(公告)日：1986-08-05
申请号：US654223
申请日：1984-09-25
申请人： Stanley J. Mikina
发明人： Stanley J. Mikina
CPC分类号： F16D51/30 , B60T7/206 , B60T8/52 , B60T8/56 , F16D51/24 , F16D2125/48 , F16D2127/10
摘要： This invention relates to a drum brake with two internal expanding brake shoes pivoted at substantially diametrically opposite axes. It incorporates the negative feedback of the brake shoe sliding friction forces to oppose the applied hydraulic brake actuating forces for the purpose of reducing variation in brake torque due to random or uncontrolled variations in the coefficient of friction between brake shoes and brake drum. The required brake shoe friction force feedback is accomplished by eliminating the normally leading brake shoe with its undesirable lock-up prone positive feedback and replacing it with a brake shoe pivoted about an axis diametrically opposite the pivot axis of the normally trailing brake shoe. The location of the shoe pivots is chosen to establish the required feedback magnitude by use of lever ratios whose adequacy is verified by the force equilibrium equations of the brake system. The resulting unconventional location of the brake shoe pivots permits the sliding friction forces between shoes and drum at both shoes to be applied as forces acting in a direction opposite the applied brake actuating hydraulic forces for forward vehicle motion. This preferred location of the brake shoe pivots also results in uniform wear of the brake shoe lining without the necessity for starwheel turnbuckle wear compensation as in conventional drum brakes. Devices are also provided for preventing brake lock-up during reverse operation due to the positive feedback of friction forces at both brake shoes for that direction of motion.
摘要翻译： 本发明涉及一种鼓式制动器，其具有在基本上沿径向相对的轴线上枢转的两个内部扩张的制动蹄。 它结合了制动蹄滑动摩擦力的负反馈，以反对所施加的液压制动器致动力，以便减少由于制动蹄和制动鼓之间的摩擦系数的随机或不受控制的变化引起的制动转矩的变化。 所需的制动蹄摩擦力反馈通过消除正常引导的制动蹄以及不期望的锁定倾斜的正反馈来实现，并且用围绕正常拖曳制动蹄的枢转轴线的轴线枢转的制动蹄来代替。 通过使用杠杆比例来选择滑枕枢轴的位置来建立所需的反馈量值，其比例通过制动系统的力平衡方程验证其足够性。 所得到的制动靴枢轴的非常规位置允许在两个鞋的鞋和滚筒之间的滑动摩擦力被施加作为作用在与所施加的制动器相反的方向上的作用力的作用力来驱动液压力以用于前进的车辆运动。 制动蹄枢转的这个优选位置也导致制动蹄衬里的均匀磨损，而不需像传统的鼓式制动器一样需要星形轮螺丝刀磨损补偿。 还提供了用于在反向操作期间防止制动器锁定的装置，这是由于在两个制动蹄上的这种方向的摩擦力的正反馈。
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公开(公告)号：US4424888A
公开(公告)日：1984-01-10
申请号：US227761
申请日：1981-01-23
申请人： Leslie C. Chouings
发明人： Leslie C. Chouings
摘要： In a shoe and drum brake wherein the shoes can move circumferentially of the drum between first and second limit positions and are biased towards the first limit positions, there is provided for transmitting force from an actuator to the shoes a lever or hydraulic device capable of transmitting the force unequally to the shoes. The larger force urges the shoes towards their second limit positions while the smaller force urges the shoes towards their first limit positions. During forward rotation of the drum, the shoes remain in their first limit positions and can be applied radially to the drum by movement of the actuator. When the drum is rotating in the reverse direction, the larger force moves the shoes circumferentially of the drum so that the actuator fails to apply the shoes to the drum and establish a braking torque.
摘要翻译： 在鞋和鼓式制动器中，其中鞋可以在第一和第二限位位置之间沿滚筒的周向移动并且朝向第一极限位置偏置，提供用于将来自致动器的力传递到鞋的能够传递的杆或液压装置 力量不平等的鞋子。 较大的力量促使鞋子朝向第二极限位置，而较小的力促使鞋子朝向其第一极限位置。 在滚筒正向旋转期间，鞋保持在其第一极限位置，并且可以通过致动器的移动径向地施加到滚筒。 当滚筒沿相反方向旋转时，较大的力使滚筒的圆周方向移动，使得致动器不能将鞋子施加到滚筒并建立制动扭矩。
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公开(公告)号：USRE31100E
公开(公告)日：1982-12-14
申请号：US97301
申请日：1979-11-26
申请人： Leslie C. Chouings
发明人： Leslie C. Chouings
CPC分类号： B60T7/206 , F16D2127/08
摘要： A drum brake, primarily for a trailer, which gives normal braking torque in forward direction and low torque in reverse. This is achieved by having a pivoted lever acting between the one ends of two shoes remote from the ends between which the brake actuator is located. The shoes act on the lever at different effective radii and the forces applied by the shoes to the lever hold it in a first position during forward rotation, thus allowing normal braking torque, and a second position during reverse rotation which allows the ends of the shoes acted on by the actuator to move apart thus allowing a limitation of the reverse braking torque by limiting the stroke of the actuator.
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公开(公告)号：US4363386A
公开(公告)日：1982-12-14
申请号：US136970
申请日：1980-04-03
申请人： Josef Peitz, Sr.
发明人： Josef Peitz, Sr.
CPC分类号： F16D51/60 , B60T7/206 , F16D2125/56
摘要： A wheel brake, particularly an overrunning wheel brake comprising a brake drum, first and second brake shoes movable in forward and rearward directions, amplifying formations arranged to cooperate with the first brake shoe and to amplify a force with which the first brake shoe is pressed against the brake drum, a displacing element for displacing the first brake shoe in the forward direction and thereby pressing the same against the brake drum with amplified pressure force, and an urging projection provided on the first brake shoe and arranged so that when the first brake shoe is displaced in the rearward direction, the projection displaces the second brake shoe which acts upon the amplifying formations and thereby the first brake shoe is again pressed against the brake drum with the amplified pressure force.
摘要翻译： 一种车轮制动器，特别是一种超越轮子制动器，其包括制动鼓，在前后方向上可移动的第一和第二制动蹄，放大与第一制动蹄配合的结构，并且放大第一制动蹄被压紧的力 制动鼓，用于使第一制动蹄在向前方向移动并由此以放大的压力将其压在制动鼓上的移动元件，以及设置在第一制动蹄上的推动突起，并且被布置成使得当第一制动蹄 在向后的方向上移位，突起移动作用在放大结构上的第二制动蹄，从而第一制动蹄再次以压缩力被压靠在制动鼓上。
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公开(公告)号：US3951243A
公开(公告)日：1976-04-20
申请号：US552107
申请日：1975-02-24
CPC分类号： B60T7/206 , F16D2127/08
摘要： A drum brake, primarily for a trailer, which gives normal braking torque in forward direction and low torque in reverse. This is achieved by having a pivoted lever acting between the one ends of two shoes remote from the ends between which the brake actuator is located. The shoes act on the lever at different effective radii and the forces applied by the shoes to the lever hold it in a first position during forward rotation, thus allowing normal braking torque, and a second position during reverse rotation which allows the ends of the shoes acted on by the actuator to move apart thus allowing a limitation of the reverse braking torque by limiting the stroke of the actuator.
摘要翻译： 主要用于拖车的鼓式制动器，其在正向方向上产生正常的制动转矩，并且反向地产生低扭矩。 这是通过使枢转杆作用在远离制动致动器所在的端部之间的两个鞋的一端之间来实现的。 鞋子以不同的有效半径作用在杠杆上，并且鞋子施加到杠杆的力在正向旋转期间将其保持在第一位置，从而允许正常的制动力矩，并且在反向旋转期间允许鞋的端部的第二位置 由致动器作用以分开，从而通过限制致动器的行程来限制反向制动转矩。
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公开(公告)号：US3870131A
公开(公告)日：1975-03-11
申请号：US37327573
申请日：1973-06-25
CPC分类号： B60T7/206 , F16D51/00 , F16D2125/60 , F16D2125/66
摘要： A caravan has a drum brake fitted to each wheel and a brake operating mechanism which includes a hitch bar for coupling to a tow bar on a tractor vehicle. Limited movement of the hitch bar relative to the caravan in either direction accompanies movement of the tractor vehicle in the same direction relative to the caravan and is transmitted by a linkage to operating rods associated with each brake. A handbrake lever is arranged to impart a greater movement to the operating rods than can be imparted by the hitch bar. Each brake is arranged to exert a greater braking effort for rotation of the drum in the forwards direction than for rotation of the drum in the other direction. One of the brake shoes is mounted on a carrier. A brake shoe expander acts between one end of the carrier and the other brake shoe and is operated by the respective operating rod. A fixed abutment is positioned between the other end of the carrier and the other shoe, and may include a spring for engagement by the carrier. The shoe expander may be of the kind which is mounted for sliding movement on the brake backplate so that thrust due to drum drag on the shoe carried by the carrier during forwards rotation of the drum is transmitted through the expander to the other brake shoe.
摘要翻译： 大篷车具有安装在每个车轮上的鼓式制动器和制动操作机构，该制动器操作机构包括用于联接到拖拉机车辆上的拖杆的牵引杆。 挂钩杆相对于大篷车在任一方向上的有限运动伴随着拖拉机车辆相对于商队的相同方向的运动，并且通过联动装置传递到与每个制动器相关联的操作杆。 手制动杆设置成比由牵引杆施加的操作杆更大的运动。 每个制动器被布置成为滚筒在向前方向上的旋转施加更大的制动力，而不是鼓在另一个方向上的转动。 其中一个制动蹄安装在载体上。 制动蹄膨胀器作用在承载件的一端和另一个制动蹄之间，由相应的操作杆操作。 固定的基座位于托架的另一端和另一个鞋之间，并且可包括用于由托架接合的弹簧。 鞋扩展器可以是安装成用于在制动器背板上滑动运动的那种，使得由滚筒在托架向前旋转期间由托架承载的滚筒拖动的推力通过膨胀器传递到另一个制动瓦。
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