WO2016146069A1 - 低惯量高强度的滚轮摇臂 - Google Patents

低惯量高强度的滚轮摇臂 Download PDF

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Publication number
WO2016146069A1
WO2016146069A1 PCT/CN2016/076574 CN2016076574W WO2016146069A1 WO 2016146069 A1 WO2016146069 A1 WO 2016146069A1 CN 2016076574 W CN2016076574 W CN 2016076574W WO 2016146069 A1 WO2016146069 A1 WO 2016146069A1
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Prior art keywords
rocker arm
low inertia
frame
inertia high
roller
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PCT/CN2016/076574
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English (en)
French (fr)
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徐纳
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杭州新坐标科技股份有限公司
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Publication of WO2016146069A1 publication Critical patent/WO2016146069A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers

Definitions

  • the invention belongs to the field of engine parts manufacturing and relates to a roller arm with low inertia and high strength.
  • the valve mechanism of the roller rocker type engine includes a cam, a roller rocker arm, an intake and exhaust valve and a hydraulic tappet.
  • the roller rocker arm includes a rocker arm and a roller.
  • the bottom end of the rocker arm has a bottom for connecting the plunger end.
  • a hemispherical convex ball socket, the right end of the ball and socket rocker frame is provided with a bearing surface connected with the valve stem, and the roller is fixed between the side walls of the middle of the rocker arm by a pin shaft; the existence of the ball socket makes the rocker arm left end
  • the upper part correspondingly forms a convex hull.
  • the existing rocker frame scheme is shown in Fig. 1.
  • the bottom surface of the middle frame of the rocker frame is substantially flush with the bottom surface of the frame body on the side of the ball socket, or other schemes.
  • the bottom surface of the middle frame of the gas mechanism is convex with respect to the bottom surface of the frame body on the side of the ball and socket.
  • the extension surface includes the right bottom surface of the ball socket, which causes the ball socket
  • the left bottom surface and the right bottom surface are not on the same horizontal line, which is not conducive to the fixing of the ball lock piece;
  • the inner surface of the ball socket is a spherical crown smaller than 180°, so that the inner surface of the upper end of the ball socket is incomplete, which may reduce the bearing area.
  • the development trend of the engine is lighter, and the valve train mechanism is also the same.
  • the roller rocker arm is one of the main components of the valve train mechanism, and how to reduce the weight of the roller rocker arm without affecting its overall strength is a problem that those skilled in the art are eager to solve but always Failure to achieve successful technical challenges.
  • the object of the present invention is to provide a roller arm with low inertia and high strength, which has the characteristics of light weight and reasonable structural design.
  • the low inertia high-strength roller rocker arm comprises a rocker arm and a roller, and the roller is fixed between the side walls of the middle part of the rocker arm through a pin shaft, and the right end of the rocker arm frame is provided with a bearing surface connected with the valve stem, the rocker arm frame
  • the left end includes a convex hull, and the convex hull includes a ball socket for connecting the hemispherical convex surface of the plunger end, which is characterized by An inner recessed area for avoiding the step is provided between the bottom surface of the side wall of the middle frame of the boom and the bottom surface of the side wall of the right side of the ball socket.
  • a bulge like a bridge of the nose is preferably designed above the indentation.
  • One of the functions of the inner recessed area is to eliminate the interference between the middle frame of the rocker frame and the engine block; the applicable surface of the U-shaped rocker arm is widened.
  • the distance between the concave surface of the recessed relief region and the step surface of the cylinder is not less than 0.5 mm. That is, the closest moving distance between the two is not less than 0.5 mm.
  • the distance between the concave surface of the recessed relief zone and the step surface of the cylinder refers to the movement between the concave surface of the roller rocker arm and the step surface of the cylinder when the roller rocker arm moves to the nearest end of the cylinder.
  • the minimum spacing Any recessed relief zone structure that conforms to the above rules may be used, preferably a curved combined surface, a fold line or other structure.
  • the bottom surface of the middle frame side wall of the rocker arm frame and the bottom surface of the frame body side of the bearing surface comprise an inner concave surface, and the apex of the inner concave surface is not higher than the arc radius R of the bottom surface of the frame body of the bearing surface
  • the intersection of the arc radius L of the bottom surface of the middle frame side wall may be preferably a curved combined surface.
  • the application is based on the lightweight guiding principle, and the weight of the product is minimized under the condition that the overall rigidity and strength of the rocker arm are kept constant. Applicants have found that the intersection of the two arcs determines the rigidity of the rocker frame. The key to the strength, the side walls below the intersection can be removed.
  • the bottom right side of the ball socket is flat with the left bottom surface.
  • flat refers to the direction of the axis of the ball and socket as the reference, and the left bottom surface and the right bottom surface are on the same horizontal line.
  • the right bottom surface of the ball socket is higher than the left bottom surface, causing the curvature of the ball socket to be missing.
  • the solution reduces the height of the right bottom surface to be level with the left bottom surface. This solution provides a relatively complete ball socket, which solves the deficiencies in the prior art.
  • the right end frame above the bearing surface contains a punching groove, and the width of the punching groove is smaller than the width of the bearing surface.
  • a punching groove can be arranged on the right end frame body. Applicants have found that an excessively large stamping groove width reduces the wall thickness of the portion of the frame body and causes stress defects.
  • a support body for connecting the ball card is provided on both sides of the convex hull opening.
  • roller rocker arm of the present application is ingeniously designed, and the weight reduction structure does not reduce the overall rigidity and strength.
  • FIG. 1 is a schematic structural view of a prior art roller rocker arm.
  • Figure 2 is a structural view showing the state in which the roller rocker arm of the present invention is at the distal end.
  • Figure 3 is a structural view showing the state in which the roller rocker arm of the present invention is at the distal end.
  • Figure 4 is a partially enlarged schematic view of a portion A.
  • Figure 5 is a schematic view showing the structure of the roller rocker arm of the present invention.
  • Figure 6 is a cross-sectional view showing the structure of the roller rocker arm of the present invention.
  • Figure 7 is a partial enlarged view of a portion B.
  • Ha the minimum distance between the concave surface of the recessed relief zone and the step surface of the cylinder
  • Hb a large distance between the concave surface of the recessed relief zone and the step surface of the cylinder.
  • the low inertia high strength roller rocker arm includes a cam 4, a roller rocker arm 5, a valve assembly 6 and a hydraulic tappet 3, and the hydraulic tappet 3 and the valve assembly 6 are mounted on the engine block 1.
  • the roller rocker arm 3 comprises a rocker arm and a roller 57.
  • the roller 57 is fixed between the side walls of the middle of the rocker arm by a pin shaft, and the right end of the rocker arm frame is provided with a bearing surface 50 connected to the valve stem, and the rocker arm frame
  • the left end includes a convex hull 60, and the convex hull 60 includes a ball socket 61 for connecting the hemispherical convex surface of the plunger end.
  • the engine block 1 below the roller rocker arm 3 includes a step 10, and the middle frame of the rocker arm frame
  • An inner recessed area 51 for escaping the step 10 is disposed between the side wall bottom surface 53 and the side wall bottom surface 52 of the right side of the ball socket.
  • the distance between the concave surface of the recessed relief area 51 and the surface of the cylinder step 10 is not less than 0.5 mm.
  • the recessed relief area 51 is preferably a circular arc combination surface.
  • the minimum distance of the concave relief zone 51 from the turning portion of the step 10 is Ha, and the maximum distance is Hb, and Ha should be not less than 0.5 mm in this embodiment.
  • An inner concave surface 54 is defined between the bottom surface 53 of the middle frame of the middle frame of the rocker frame and the bottom surface 55 of the frame side of the bearing surface.
  • the apex of the concave surface 54 is not higher than the circle of the bottom surface 55 of the frame side of the bearing surface.
  • the concave surface 54 is preferably a circular arc combined surface.
  • the right bottom surface 63 of the ball socket 61 is flush with the left bottom surface 62.
  • a convex sill table 59 is formed between the convex hull 60 and the middle frame 58.
  • the middle frame 58 is a nose-beam type ridge 580 for the purpose of ensuring the strength of the rocker arm to counteract the overall strength loss due to the recessed relief zone 51.
  • the ridge 580 of the middle frame body 58 is located in the recessed avoidance zone 51. Just above it.
  • the right end frame above the bearing surface 50 contains a stamping groove 56 having a width that is less than the width of the bearing surface 50, i.e., less than the width of the bearing surface groove 64.
  • the left side wall 66 and the right side wall 65 of the bearing surface 50 constitute the bearing surface groove 64.
  • the convex bag 60 is provided on both sides with a support for connecting the ball card 2, and the support body includes a front support body 67 and a rear support body 68.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

低惯量高强度的滚轮摇臂，含有摇臂架和滚轮（57），滚轮（57）通过销轴固定在摇臂架中部的侧壁之间，摇臂架的右端设有与气门杆连接的承载面（50），摇臂架的左端含有一个凸包（60），凸包（60）内含用于连接柱塞端部半球凸面的球窝（61），滚轮摇臂（5）下方的发动机缸体（1）含有一个台阶（10），摇臂架中间架体的侧壁底面（53）与球窝右侧架体的侧壁底面（52）之间设有一个用于避让台阶（10）的内凹避让区（51）。该滚轮摇臂具有轻量化和结构设计合理的特点。

Description

低惯量高强度的滚轮摇臂 技术领域
本发明属于发动机配件制造领域，涉及一种低惯量高强度的滚轮摇臂。
背景技术
滚轮摇臂式的发动机的配气机构包括凸轮、滚轮摇臂、进排气门和液压挺柱，滚轮摇臂包括摇臂架和滚轮，摇臂架的左端底部含有一个用于连接柱塞端部半球凸面的球窝，该球窝摇臂架的右端设有与气门杆连接的承载面，滚轮通过销轴固定在摇臂架中部的侧壁之间；球窝的存在使得摇臂架左端上部相应形成一个凸包。
目前已有的摇臂架方案，如图1所示，美国专利文献US04697473，如图1，摇臂架的中部架体底面与球窝一侧的架体底面基本平齐，或其他方案的配气机构中部架体底面相对球窝一侧架体底面外凸，这些结构在柱状液压挺住突出气缸盖长度较少的情况下，就不适合，可能会在一些工况下发生摇臂架底面与汽缸盖干涉。
其次，摇臂架中部架体与凸包底面之间存在高度差，中部架体与凸包之间平滑过渡形成一个倾斜的延展面，该延展面包含了球窝的右侧底面，造成球窝左侧底面和右侧底面不在同一水平线上，不利于球头锁片的固定；这种球窝的内表面为小于180°的球冠，使得球窝上端内表面不完整，可能会减少承载面积。
发动机的发展趋势是轻量化，配气机构也是如此，滚轮摇臂是配气机构的主要部件之一，而如何降低滚轮摇臂的重量而不影响其整体强度是本领域技术人员渴望解决但始终未能获得成功的技术难题。
发明内容
本发明的目的在于提供一种低惯量高强度的滚轮摇臂，具有轻量化和结构设计合理的特点。
为实现上述目的，本方案采用的具体技术方案如下：
低惯量高强度的滚轮摇臂，含有摇臂架和滚轮，滚轮通过销轴固定在摇臂架中部的侧壁之间，摇臂架的右端设有与气门杆连接的承载面，摇臂架的左端含有一个凸包，凸包内含用于连接柱塞端部半球凸面的球窝，其特征在于所述摇 臂架中部架体的侧壁底面与球窝右侧架体的侧壁底面之间设有一个用于避让台阶的内凹避让区。同时，为了保证摇臂的强度，在内凹的上方，较佳地设计了类似鼻梁的隆起。
内凹避让区的作用之一是消除了摇臂架的中部架体与发动机缸体之间的干涉；使这种U型摇臂的适用面拓宽。
所述内凹避让区的内凹表面与缸体台阶表面之间的距离不小于0.5mm。即两者的最近运动距离不小于0.5mm。
这里所说内凹避让区的内凹表面与缸体台阶表面之间的距离，指的是滚轮摇臂运动至相对缸体最近端时，滚轮摇臂的内凹表面与缸体台阶表面之间的最小间距。凡是符合上述规律的内凹避让区结构均可，较佳地为弧线组合的表面，折线或其他结构也可。
所述摇臂架的中部架体侧壁底面与承载面的架体侧壁底面之间含有一个内凹面，该内凹面的顶点不高于承载面的架体侧壁底面的圆弧半径R与中部架体侧壁底面圆弧半径L的交点。凡是符合上述规律的内凹面结构均可，较佳地为弧线组合的表面。
本申请基于轻量化的指导思想，在保持摇臂整体刚性和强度不变的条件下尽量减轻产品的重量，申请人研究得出，上述两段圆弧的交点为决定该部分摇臂架刚性和强度的关键，交点以下的部分侧壁可以去除。
所述球窝右侧底面与左侧底面持平。
此处所谓的持平，指的是在球窝轴线方向为基准，左侧底面和右侧底面在同一水平线上。
如背景技术所述，现有技术的摇臂，球窝的右侧底面高于左侧底面，造成球窝的弧度缺失。为了解决该技术问题，本方案降低了右侧底面的高度，使之与左侧底面相平，这种方案提供了一种结构较为完整的球窝，解决了现有技术中的不足。
为了实现上述结构，通过对板材的进一步冷成形工艺，在凸包与中部架体之间形成一个凸包沉台，降低了球窝右侧底面的相对高度。
所述承载面上方的右端架体含有一个冲压槽，该冲压槽的宽度小于承载面的宽度。
为了减重，可以在右端架体上设置一个冲压槽，申请人发现，过大的冲压槽宽度会降低该部分架体折弯处的壁厚，造成应力缺陷。
所述凸包开放两侧设有用于连接球头卡片的支撑体。
所谓凸包开放两侧，指的是没有侧壁包覆的两侧。
本申请方案中的滚轮摇臂设计巧妙，减重结构不降低整体刚度和强度。
附图说明
图1是现有技术滚轮摇臂的结构示意图。
图2是本发明滚轮摇臂处于远端的结构状态图。
图3是本发明滚轮摇臂处于远端的结构状态图。
图4是A部分局部放大示意图。
图5是本发明滚轮摇臂结构示意图。
图6是本发明滚轮摇臂剖视结构示意图。
图7是B部分局部放大图。
其中：
1.缸体
2.球头卡片
3.液压挺柱
4.凸轮
5.滚轮摇臂
6.气门组件
10、台阶
50、承载面
51、内凹避让区
52、球窝右侧架体的侧壁底面
53、摇臂架中部架体的侧壁底面
54、内凹部
55、承载面的架体侧壁底面
56、冲压槽
57、滚轮
58、中部架体
59、凸包沉台
60、凸包
61、球窝
62、球窝左侧底面
63、球窝右侧底面
64、承载面槽
65、承载面右侧壁
66、承载面左侧壁
67、前支撑体
68、后支撑体
580、隆起。
Ha：内凹避让区的内凹表面与缸体台阶表面之间的最小距离
Hb：内凹避让区的内凹表面与缸体台阶表面之间的较大距离。
具体实施方式
如图2-7所示，低惯量高强度的滚轮摇臂，包括凸轮4、滚轮摇臂5、气门组件6和液压挺柱3，液压挺柱3和气门组件6安装在发动机缸体1上，滚轮摇臂3含有摇臂架和滚轮57，滚轮57通过销轴固定在摇臂架中部的侧壁之间，摇臂架的右端设有与气门杆连接的承载面50，摇臂架的左端含有一个凸包60，凸包60内含用于连接柱塞端部半球凸面的球窝61，所述滚轮摇臂3下方的发动机缸体1含有一个台阶10，摇臂架中部架体的侧壁底面53与球窝右侧架体的侧壁底面52之间设有一个用于避让台阶10的内凹避让区51。
内凹避让区51的内凹表面与缸体台阶10表面之间的距离不小于0.5mm。如图4所示的放大图，所述内凹避让区51较佳地为圆弧组合面。内凹避让区51的与台阶10的转折部的最小距离为Ha，最大距离为Hb，本方案中Ha应不小于0.5mm。
摇臂架的中部架体的侧壁底面53与承载面的架体侧壁底面55之间含有一个内凹面54，该内凹面54的顶点不高于承载面的架体侧壁底面55的圆弧半径R与中部架体侧壁底面53圆弧半径L的交点.即图7中的交点C，整段内凹面 54应在两条圆弧延长线组成的边线之下。所述内凹面54较佳地为圆弧组合面。
所述球窝61的右侧底面63与左侧底面62持平。
所述凸包60与中部架体58之间形成一个凸包沉台59。中部架体58为鼻梁式的隆起580，目的在于保证摇臂的强度，抵消由于内凹避让区51引起的整体强度损失，较佳地，中部架体58的隆起580部分位于内凹避让区51的正上方。
承载面50上方的右端架体含有一个冲压槽56，冲压槽56的宽度小于承载面50的宽度，即小于承载面槽64的宽度。承载面50的左侧壁66和右侧壁65组成了所述的承载面槽64。
所述凸包60开放两侧设有用于连接球头卡片2的支撑体，该支撑体包括前支撑体67和后支撑体68。

Claims (12)

  1. 低惯量高强度的滚轮摇臂，含有摇臂架和滚轮(57)，滚轮(57)通过销轴固定在摇臂架中部的侧壁之间，摇臂架的右端设有与气门杆连接的承载面(50)，摇臂架的左端含有一个凸包(60)，凸包(60)内含用于连接柱塞端部半球凸面的球窝(61)，所述滚轮摇臂(5)下方的发动机缸体(1)含有一个台阶(10)，其特征在于所述摇臂架中间架体的侧壁底面(53)与球窝右侧架体的侧壁底面(52)之间设有一个用于避让台阶(10)的内凹避让区(51)。
  2. 根据权利要求1所述低惯量高强度的滚轮摇臂，其特征在于所述内凹避让区(51)的内凹表面与缸体台阶(10)表面之间的距离不小于0.5mm。
  3. 根据权利要求1所述低惯量高强度的滚轮摇臂，其特征在于所述摇臂架的中间架体的侧壁底面(53)与承载面的架体侧壁底面(55)之间含有一个内凹面(54)，该内凹面(54)的顶点不高于承载面(50)的架体侧壁底面(55)的圆弧半径R与中部架体侧壁底面(53)圆弧半径L的交点。
  4. 根据权利要求1所述低惯量高强度的滚轮摇臂，其特征在于所述内凹避让区(51)为圆弧组合面。
  5. 根据权利要求3所述低惯量高强度的滚轮摇臂，其特征在于所述内凹面(54)为圆弧组合面。
  6. 根据权利要求1所述低惯量高强度的滚轮摇臂，其特征在于所述球窝(61)的右侧底面(63)与左侧底面(62)持平。
  7. 根据权利要求1所述低惯量高强度的滚轮摇臂，其特征在于所述凸包(60)与中部架体(58)之间形成一个凸包沉台(59)。
  8. 根据权利要求1所述低惯量高强度的滚轮摇臂，其特征在于所述承载面(50)上方的右端架体含有一个冲压槽(56)。
  9. 根据权利要求8所述低惯量高强度的滚轮摇臂，其特征在于所述冲压槽(56)的宽度小于承载面(50)的宽度。
  10. 根据权利要求1所述低惯量高强度的滚轮摇臂，其特征在于所述凸包(60)开放两侧设有用于连接球头卡片的支撑体。
  11. 根据权利要求1所述低惯量高强度的滚轮摇臂，其特征在于所述摇臂架上设有用于补偿内凹避让区(51)的隆起(580)。
  12. 根据权利要求11所述低惯量高强度的滚轮摇臂，其特征在于所述隆起(580) 位于内凹避让区(51)的正上方。
PCT/CN2016/076574 2015-03-18 2016-03-17 低惯量高强度的滚轮摇臂 WO2016146069A1 (zh)

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CN109779712A (zh) * 2018-12-28 2019-05-21 杭州新坐标科技股份有限公司 滚轮摇臂

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