WO2016011945A1 - 带有轴承限位结构的气压盘式制动器压力臂 - Google Patents

带有轴承限位结构的气压盘式制动器压力臂 Download PDF

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Publication number
WO2016011945A1
WO2016011945A1 PCT/CN2015/084784 CN2015084784W WO2016011945A1 WO 2016011945 A1 WO2016011945 A1 WO 2016011945A1 CN 2015084784 W CN2015084784 W CN 2015084784W WO 2016011945 A1 WO2016011945 A1 WO 2016011945A1
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WO
WIPO (PCT)
Prior art keywords
pressure arm
circular arc
arc surface
bearing
disc brake
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Application number
PCT/CN2015/084784
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English (en)
French (fr)
Inventor
陈振
苏松
石潮
杨熊
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武汉元丰汽车零部件有限公司
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Application filed by 武汉元丰汽车零部件有限公司 filed Critical 武汉元丰汽车零部件有限公司
Priority to US15/328,902 priority Critical patent/US20170211645A1/en
Publication of WO2016011945A1 publication Critical patent/WO2016011945A1/zh

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    • 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
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • 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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/2255—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is pivoted
    • 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
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—Pivots or supporting members therefor
    • 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
    • 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
    • F16D2121/14—Mechanical
    • 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
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
    • F16D2125/28—Cams; Levers with cams
    • F16D2125/32—Cams; Levers with cams acting on one cam follower

Definitions

  • the invention relates to a pneumatic disc brake pressure arm, in particular to a pneumatic disc brake pressure arm with a bearing limit structure.
  • disc brakes have the advantage that drum brakes cannot match, and pneumatic disc brakes are becoming more and more widely used in commercial vehicles.
  • the pneumatic disc brake achieves braking by providing a stable and effective braking torque by the moment of friction between the friction plate and the brake disc that hinders the rotation of the wheel.
  • the pressure arm increases the input force of the cylinder input by a lever principle to provide sufficient braking torque.
  • the pressure arm is fixed on the caliper body by a needle bearing, a fulcrum cylinder and a positioning block.
  • the rotating circular surface rotates around the center of the shaft, and a low friction coefficient sliding bearing or a needle bearing is on the pressure arm. Scroll around a fixed point.
  • the center of the arc of the thrust surface of the pressure arm is at the maximum stroke position, the center of the pressure will simultaneously produce a displacement to the left (brake force) and the up and down direction.
  • the pressure arm rotates from the position to the position 2
  • the position of the center of the arc of the rotation is unchanged, and the position of the center of the arc of the thrust surface changes.
  • the horizontal component of the displacement (3.8 mm in Fig.
  • a pneumatic disc brake pressure arm with a bearing limit structure including a pressure arm, which is fixed by a needle bearing, a fulcrum cylinder and a positioning block.
  • a pressure arm which is fixed by a needle bearing, a fulcrum cylinder and a positioning block.
  • One end of the pressure arm is a force receiving portion, and the other end is a spinning portion, an inner surface of the spinning portion is a rotating circular arc surface, and an outer surface is a thrust circular arc surface, and the fulcrum cylinder is disposed on the rotating circle a concave portion formed by the curved surface, wherein the fulcrum cylinder is disposed concentrically with the rotating circular arc surface, a plurality of the needle bearing are disposed around the fulcrum cylinder, and located at the rotating circular arc surface and the fulcrum cylinder The positioning block is disposed on a side of the fulcrum cylinder away from the rotating circular arc surface;
  • the spinning portion is provided with a limiting block at an upper end of the rotating circular arc surface, and a limiting piece is disposed at a lower end of the rotating circular arc surface, wherein a lower end surface of the limiting block is higher than The inner surface of the positioning block is lower than the top of the needle bearing adjacent to the limiting block.
  • the thrust circular arc surface is disposed differently from the fulcrum cylinder.
  • the limiting block is integrally formed with the spinning portion.
  • the limiting block is mounted and fixed at an upper end of the rotating circular arc surface.
  • the limiting piece is fixed to the lower end of the rotating circular arc surface by a rivet for resisting the needle bearing close to the limiting piece.
  • a groove is formed on an outer side of the lower end portion of the spinning portion, and the groove has a through hole therein, and the through hole communicates with the outer surface of the rotating circular arc surface and the lower end portion of the spinning portion.
  • the rivet is disposed in the through hole.
  • the limiting piece extends from the outer side of the lower end portion of the spinning portion and covers the lower end portion of the spinning portion, and then bends inwardly to the lower end of the rotating circular surface .
  • the spinning portion is formed by bending downwardly from the force receiving portion, and the spinning portion has an arc shape.
  • the spinning portion is provided with a limiting block at an upper end of the rotating circular arc surface, and a limiting piece is disposed at a lower end of the rotating circular arc surface, wherein a lower end surface of the limiting block is higher than the positioning
  • the inner surface of the block is lower than the top of the needle bearing adjacent the stop block.
  • FIG. 1 is a schematic structural view of a conventional pressure arm
  • FIG. 2 is a movement trend diagram of a needle bearing of a conventional pressure arm
  • Figure 3 is another movement trend diagram of the needle bearing of the existing pressure arm
  • FIG. 4 is a schematic structural view of a pressure disc brake pressure arm with a bearing limit structure according to an embodiment of the present invention
  • FIG. 5 is a perspective view of a pressure arm according to an embodiment of the present invention.
  • an embodiment of the present invention provides a pneumatic disc brake pressure arm with a bearing limit structure, including a pressure arm 1, which passes through a needle bearing 3, a fulcrum cylinder 2, and a positioning block. 6 is fixed to the caliper body of the air disc brake.
  • one end of the pressure arm 1 is a force receiving portion 1a, and the other end is a spinning portion 1b.
  • the spinning portion 1b is formed by bending and extending the force receiving portion 1a downward.
  • the spinning portion 1b has an arc structure.
  • the inner surface of the spinning portion 1b is a rotating circular arc surface 1d, and the outer surface is a thrust circular arc surface.
  • the fulcrum cylinder 2 is disposed in a concave portion formed by the rotating circular arc surface 1d, and the fulcrum cylinder 2 is The rotating circular arc surface 1d is concentrically arranged.
  • the thrust circular arc surface is disposed differently from the fulcrum cylinder 2 such that the thrust circular arc surface does not coincide with the rotation angle of the rotating circular arc surface 1d.
  • a plurality of the needle bearings 3 are disposed around the fulcrum cylinder 2, and are located between the rotating circular arc surface 1d and the fulcrum cylinder 2, and the positioning block 6 is disposed at the The fulcrum cylinder 2 is away from the side of the rotating circular arc surface 1d, and the positioning block 6 is used to abut against the fulcrum cylinder 2.
  • the spinning portion 1b is provided with a limiting block 1c at the upper end of the rotating circular arc surface 1d.
  • the limiting block 1c and the spinning Part 1b is integrally formed, that is, The stopper 1c is protruded from the spinning portion 1b.
  • the limiting block 1c is mounted and fixed at the upper end of the rotating circular arc surface 1d, that is, the limiting block 1c is separately formed and then mounted on the rotating portion of the rotating portion 1b.
  • the lower end surface of the limiting block 1c is higher than the inner surface of the positioning block 6 and lower than the top of the needle bearing 3 near the limiting block 1c.
  • the lower end surface of the limiting block 1c is higher than the inner surface of the positioning block 6 for preventing interference between the limiting block 1c and the positioning block 6, thereby affecting the normal operation of the individual pressure arm 1;
  • the lower end surface of the limiting block 1c is lower than the top of the needle bearing 3 near the limiting block 1c for resisting the needle bearing 3, if the lower end surface of the limiting block 1c is higher than the near end At the top of the needle bearing 3 of the limiting block 1c, the positioning block 6 cannot limit the needle bearing 3, and the needle bearing 3 is still easy to roll out.
  • the spinning portion 1b is provided with a limiting piece 4 at a lower end of the rotating circular arc surface 1d, and the limiting piece 4 is fixed to the lower end of the rotating circular arc surface 1d by a rivet. At the same time, it is used to resist the needle bearing 3 close to the limiting piece 4, preventing the needle bearing 3 from rolling out.
  • a groove (not shown) is disposed on the outer side of the lower end portion of the spinning portion 1b, and the groove has a through hole 1e therein, and the through hole 1e communicates with the Rotating the circular arc surface 1d and the outer side of the lower end portion of the spinning portion 1b, the rivet is disposed in the through hole 1e, the limiting piece 4 is fixed by the rivet, and the limiting piece 4 is self-owned
  • the outer end of the lower end portion of the spinning portion 1b is bent and extends to cover the lower end portion of the spinning portion 1b, and is bent to extend inwardly to the lower end of the rotating circular arc surface 1d so as to be able to withstand the lowermost end. Needle roller bearing 3 at the place.
  • the force receiving portion 1a of the pressure arm 1 is actuated by a cylinder, and the spinning portion 1b is rotated around the center of the fulcrum cylinder 2, and the center of the arc of the thrust surface of the pressure arm 1 is moved to the maximum stroke position.
  • the needle bearing 3 rolls in the circular arc surface 1d of the pressure arm 1.
  • the needle linear velocity of the needle bearing 3 which is in contact with the rotating circular arc surface 1d is the same as the linear velocity of the rotating circular arc surface 1d, and the diameter of the needle bearing 3 is It is smaller than the circular arc surface 1d, so the angular velocity of the needle bearing 3 is smaller than the angular velocity of the rotating circular surface 1d, that is, the small arc formed by the needle bearing 3 with respect to the rotating circular surface 1d of the pressure arm 1 is slowly rotated. After the number of brakes, the needle bearing 3 has a tendency to roll outward in a small arc of the pressure arm 1.
  • the spinning portion 1b is provided with a limiting block 1c at an upper end of the rotating circular arc surface 1d, and a limiting piece 4 is disposed at a lower end of the rotating circular arc surface 1d.
  • the lower end surface of the bit block 1c is higher than the inner surface of the positioning block 6, lower than the top of the needle bearing 3 near the limit block 1c.
  • the pneumatic disc brake pressure arm with the bearing limiting structure cooperates with the limiting piece 1c and the limiting piece 4, and the needle bearing 3 is in any case during braking It is always within the range of the rotating circular surface 1d of the pressure arm 1, so that the brake provides a stable and effective braking torque to ensure safe driving.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

一种带有轴承限位结构的气压盘式制动器压力臂被公开。压力臂（1）的一端为受力部（1a），另一端为旋压部（1b）。旋压部（1b）的内表面为转动圆弧面（1d），外表面为推力圆弧面。支点圆柱（2）设于转动圆弧面（1d）形成的凹部内且与转动圆弧面（1d）同心设置，多个滚针轴承（3）环绕着支点圆柱（2）设置，定位块（6）设于支点圆柱（2）远离转动圆弧面（1d）的一侧。旋压部（1b）于转动圆弧面（1d）的上端处设有限位块（1c），于转动圆弧面（1d）的下端处设有限位片（4），限位块（1c）的下端面高于定位块（6）的内表面，低于靠近限位块（1c）的滚针轴承（3）的顶部。带有轴承限位结构的气压盘式制动器压力臂通过限位块（1c）和限位片（4）的共同作用，保证了滚针轴承（3）始终处于压力臂（1）的转动圆弧面（1d）的范围内。

Description

带有轴承限位结构的气压盘式制动器压力臂 技术领域
本发明涉及一种气压盘式制动器压力臂，尤其涉及一种带有轴承限位结构的气压盘式制动器压力臂。
背景技术
目前，盘式制动器具有鼓式制动器无法比拟的优势，气压盘式制动器在商用车领域的应用也越来越广泛。气压盘式制动器通过提供稳定有效的制动力矩，靠摩擦片与制动盘接触产生的阻碍车轮转动的力矩来实现制动。压力臂作为增力机构最关键的部件，通过杠杆原理对气缸输入的输入力进行倍数上的增大，来提供足够的制动力矩。
压力臂通过滚针轴承、支点圆柱和定位块固定在卡钳体上，当压力臂被气缸促动，旋转圆弧面绕轴中心旋转，一个低摩擦系数的滑动轴承或者滚针轴承在压力臂上绕一固定点进行滚动。压力臂推力面圆弧圆心在最大行程位置时，圆心会同时在向左(产生制动力)和上下方向各产生一个位移。压力臂从位置一转动到位置二，转动圆弧圆心位置不变，推力面圆弧圆心位置改变，位移的水平分量(图1中为3.8mm)代表基准座移动产生摩擦片推力的方向，位移的垂直分量(图1中为0.31mm)代表滚针推力轴承向着和制动盘平行的方向运动。同时，低摩擦系数的滑动轴承或者滚针轴承在压力臂的小圆弧内滚动一定距离，由于滑动轴承或者滚针轴承相对于压力臂圆弧运动速度慢，经过多次制动，滑动轴承或者滚针轴承有滚出压力臂小圆弧的运动趋势(如图2图3所示)。而滑动轴承或者滚针轴承如果滚出压力臂小圆弧，支点圆柱会直接与压力臂小圆弧接触，导致制动***卡死，致使整个制动***失效。如何减小或者消除滑动轴承或者滚针轴承滚出压力臂小圆弧正是现在的设计目的之一。
因此有必要设计一种带有轴承限位结构的气压盘式制动器压力臂，以克服上述问题。
技术问题
本发明的目的在于克服现有技术的缺陷，提供了一种避免滚针轴承在运动过程中滚出的带有轴承限位结构的气压盘式制动器压力臂。
技术解决方案
为达到上述目的，本发明的技术方案是这样实现的：一种带有轴承限位结构的气压盘式制动器压力臂，包括压力臂，所述压力臂通过滚针轴承、支点圆柱和定位块固定在气压盘式制动器的卡钳体上；
所述压力臂的一端为受力部，另一端为旋压部，所述旋压部的内表面为转动圆弧面，外表面为推力圆弧面，所述支点圆柱设于所述转动圆弧面形成的凹部内，且所述支点圆柱与所述转动圆弧面同心设置，多个所述滚针轴承环绕着所述支点圆柱设置，并位于所述转动圆弧面和所述支点圆柱之间，所述定位块设于所述支点圆柱远离所述转动圆弧面的一侧；
所述旋压部于所述转动圆弧面的上端处设有一限位块，于所述转动圆弧面的下端处设有一限位片，其中，所述限位块的下端面高于所述定位块的内表面，低于靠近所述限位块的滚针轴承的顶部。
进一步地，所述推力圆弧面与所述支点圆柱不同心设置。
进一步地，所述限位块与所述旋压部一体成型。
进一步地，所述限位块安装固定于所述转动圆弧面的上端处。
进一步地，所述限位片通过铆钉固定于所述转动圆弧面的下端处，用于抵挡靠近所述限位片的滚针轴承。
进一步地，所述旋压部的下端部的外侧设有一凹槽，所述凹槽内具有一通孔，所述通孔连通所述转动圆弧面和所述旋压部的下端部的外侧，所述铆钉设于所述通孔内。
进一步地，所述限位片自所述旋压部的下端部的外侧弯折延伸并覆盖所述旋压部的下端部，再弯折向内延伸至所述转动圆弧面的下端处。
进一步地，所述旋压部由所述受力部向下弯折延伸而成，所述旋压部呈弧形结构。
有益效果
本发明具有以下有益效果：
所述旋压部于所述转动圆弧面的上端处设有一限位块，于所述转动圆弧面的下端处设有一限位片，所述限位块的下端面高于所述定位块的内表面，低于靠近所述限位块的滚针轴承的顶部。当滚针轴承运动到限位块的位置时，滚针轴承继续向后运动的过程中，限位块会将滚针轴承回拨，从而限制了滚针轴承从压力臂 的转动圆弧面滚出；当滚针轴承运动到限位片时，在滚针轴承继续往前运动的过程中，限位片会将滚针轴承回拨，从而限制了滚针轴承从压力臂的转动圆弧面滚出，保证了带有轴承限位结构的气压盘式制动器压力臂的正常工作。
附图说明
图1为现有的压力臂的结构示意图；
图2为现有的压力臂的滚针轴承的运动趋势图；
图3为现有的压力臂的滚针轴承的另一运动趋势图；
图4为本发明实施例提供的带有轴承限位结构的气压盘式制动器压力臂的结构示意图；
图5为本发明实施例提供的压力臂的立体图。
本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其它实施例，都属于本发明保护的范围。
如图1至图5，本发明实施例提供一种带有轴承限位结构的气压盘式制动器压力臂，包括压力臂1，所述压力臂1通过滚针轴承3、支点圆柱2和定位块6固定在气压盘式制动器的卡钳体上。
如图1至图5，所述压力臂1的一端为受力部1a，另一端为旋压部1b，所述旋压部1b由所述受力部1a向下弯折延伸而成，所述旋压部1b呈弧形结构。所述旋压部1b的内表面为转动圆弧面1d，外表面为推力圆弧面，所述支点圆柱2设于所述转动圆弧面1d形成的凹部内，且所述支点圆柱2与所述转动圆弧面1d同心设置。而所述推力圆弧面则与所述支点圆柱2不同心设置，使得所述推力圆弧面与所述转动圆弧面1d的旋转角度不一致。
如图1至图5，多个所述滚针轴承3环绕着所述支点圆柱2设置，并位于所述转动圆弧面1d和所述支点圆柱2之间，所述定位块6设于所述支点圆柱2远离所述转动圆弧面1d的一侧，所述定位块6用于抵顶住所述支点圆柱2。
如图1至图5，所述旋压部1b于所述转动圆弧面1d的上端处设有一限位块1c，在本较佳实施例中，所述限位块1c与所述旋压部1b一体成型，也即是，所 述限位块1c由所述旋压部1b上凸设而成。在其它实施例中，所述限位块1c安装固定于所述转动圆弧面1d的上端处，也即是，所述限位块1c单独成型，再安装于所述旋压部1b的转动圆弧面1d的上端处。其中，所述限位块1c的下端面高于所述定位块6的内表面，并低于靠近所述限位块1c的滚针轴承3的顶部。所述限位块1c的下端面高于所述定位块6的内表面用于防止所述限位块1c与所述定位块6之间产生干涉，从而影响单独压力臂1的正常工作；所述限位块1c的下端面低于靠近所述限位块1c的滚针轴承3的顶部，用于抵挡住所述滚针轴承3，若所述限位块1c的下端面高于靠近所述限位块1c的滚针轴承3的顶部，则所述定位块6会无法限位滚针轴承3，滚针轴承3还是容易滚出。
如图1至图5，所述旋压部1b于所述转动圆弧面1d的下端处设有一限位片4，所述限位片4通过铆钉固定于所述转动圆弧面1d的下端处，用于抵挡靠近所述限位片4的滚针轴承3，防止滚针轴承3滚出。在本较佳实施例中，所述旋压部1b的下端部的外侧设有一凹槽(已图示，未标号)，所述凹槽内具有一通孔1e，所述通孔1e连通所述转动圆弧面1d和所述旋压部1b的下端部的外侧，所述铆钉设于所述通孔1e内，所述限位片4由所述铆钉固定，所述限位片4自所述旋压部1b的下端部的外侧弯折延伸并覆盖所述旋压部1b的下端部，再弯折向内延伸至所述转动圆弧面1d的下端处，从而可抵挡住最下端处的滚针轴承3。
如图1至图5，所述压力臂1的受力部1a被气缸促动，旋压部1b绕支点圆柱2中心旋转，压力臂1的推力面圆弧圆心在运动到最大行程位置过程中，所述滚针轴承3在压力臂1的转动圆弧面1d内滚动。在压力臂1的转动圆弧面1d形成的小圆弧范围内，与转动圆弧面1d接触的滚针轴承3的滚针线速度和转动圆弧面1d线速度相同，滚针轴承3中径小于转动圆弧面1d，因此滚针轴承3的角速度小于转动圆弧面1d的角速度，即滚针轴承3相对于压力臂1的转动圆弧面1d形成的小圆弧滚动得慢，经过一定次数的制动后，滚针轴承3在压力臂1小圆弧内有向外滚出的趋势。
如图1至图5，所述旋压部1b于所述转动圆弧面1d的上端处设有限位块1c，于所述转动圆弧面1d的下端处设有限位片4，所述限位块1c的下端面高于所述定位块6的内表面，低于靠近所述限位块1c的滚针轴承3的顶部。当滚针轴承3运动到限位块1c的位置时，在滚针轴承3继续向后运动的过程中，所述限位 块1c会将滚针轴承3回拨，从而限制了滚针轴承3从压力臂1的转动圆弧面1d滚出；当滚针轴承3运动到限位片4时，在滚针轴承3继续往前运动的过程中，所述限位片4会将滚针轴承3回拨，从而限制了滚针轴承3从压力臂1的转动圆弧面1d滚出，保证了带有轴承限位结构的气压盘式制动器压力臂1的正常工作。
所述带有轴承限位结构的气压盘式制动器压力臂通过所述限位块1c和所述限位片4的共同作用，在制动过程中，所述滚针轴承3在任何情况下都始终处于压力臂1的转动圆弧面1d的范围内，从而使制动器提供稳定而有效的制动力矩，保证行车安全。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (8)

  1. 一种带有轴承限位结构的气压盘式制动器压力臂，其特征在于，包括压力臂，所述压力臂通过滚针轴承、支点圆柱和定位块固定在气压盘式制动器的卡钳体上；
    所述压力臂的一端为受力部，另一端为旋压部，所述旋压部的内表面为转动圆弧面，外表面为推力圆弧面，所述支点圆柱设于所述转动圆弧面形成的凹部内，且所述支点圆柱与所述转动圆弧面同心设置，多个所述滚针轴承环绕着所述支点圆柱设置，并位于所述转动圆弧面和所述支点圆柱之间，所述定位块设于所述支点圆柱远离所述转动圆弧面的一侧；
    所述旋压部于所述转动圆弧面的上端处设有一限位块，于所述转动圆弧面的下端处设有一限位片，其中，所述限位块的下端面高于所述定位块的内表面，低于靠近所述限位块的滚针轴承的顶部。
  2. 如权利要求1所述的带有轴承限位结构的气压盘式制动器压力臂，其特征在于：所述推力圆弧面与所述支点圆柱不同心设置。
  3. 如权利要求1所述的带有轴承限位结构的气压盘式制动器压力臂，其特征在于：所述限位块与所述旋压部一体成型。
  4. 如权利要求1所述的带有轴承限位结构的气压盘式制动器压力臂，其特征在于：所述限位块安装固定于所述转动圆弧面的上端处。
  5. 如权利要求1所述的带有轴承限位结构的气压盘式制动器压力臂，其特征在于：所述限位片通过铆钉固定于所述转动圆弧面的下端处，用于抵挡靠近所述限位片的滚针轴承。
  6. 如权利要求5所述的带有轴承限位结构的气压盘式制动器压力臂，其特征在于：所述旋压部的下端部的外侧设有一凹槽，所述凹槽内具有一通孔，所述通孔连通所述转动圆弧面和所述旋压部的下端部的外侧，所述铆钉设于所述通孔内。
  7. 如权利要求1所述的带有轴承限位结构的气压盘式制动器压力臂，其特征在于：所述限位片自所述旋压部的下端部的外侧弯折延伸并覆盖所述旋压部的下端部，再弯折向内延伸至所述转动圆弧面的下端处。
  8. 如权利要求1所述的带有轴承限位结构的气压盘式制动器压力臂，其特征在于：所述旋压部由所述受力部向下弯折延伸而成，所述旋压部呈弧形结构。
PCT/CN2015/084784 2014-07-25 2015-07-22 带有轴承限位结构的气压盘式制动器压力臂 WO2016011945A1 (zh)

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