CN108915814B - Cam shaft driving device of common rail diesel engine - Google Patents
Cam shaft driving device of common rail diesel engine Download PDFInfo
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- CN108915814B CN108915814B CN201810987577.4A CN201810987577A CN108915814B CN 108915814 B CN108915814 B CN 108915814B CN 201810987577 A CN201810987577 A CN 201810987577A CN 108915814 B CN108915814 B CN 108915814B
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- 239000003921 oil Substances 0.000 claims abstract description 33
- 239000010687 lubricating oil Substances 0.000 claims abstract description 23
- 230000002159 abnormal effect Effects 0.000 claims abstract description 8
- 238000005461 lubrication Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000010705 motor oil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
本发明属于机械技术领域，提出一种共轨柴油机凸轮轴驱动装置。提出的一种共轨柴油机凸轮轴驱动装置具有呈阶梯轴状的轮毂；轮毂的中心具有阶梯通孔；轮毂的右侧端面具有用以与凸轮轴过盈配合的盲孔；轮毂上具有与阶梯通孔连通的径向油孔；凸轮轴的中心具有与阶梯通孔相连通的压力润滑油道Ⅱ；凸轮轴的左端与所述的轮毂过盈配合，右端伸出轮毂通过凸轮轴衬套支撑在机体内；轮毂上套置有前端盖，且前端盖与轮毂之间设置有与轮毂间隙配合的轴承衬套；轴承衬套与轮毂之间的间隙连通所述的径向油孔；轮毂上套置有与其间隙配合的驱动齿轮；轮毂的左端固定有止推装置。本发明有效避免了驱动端凸轮轴衬套的异常磨损；提高了凸轮轴驱动装置的可靠性。
The invention belongs to the field of mechanical technology and proposes a common rail diesel engine camshaft driving device. The proposed common rail diesel engine camshaft drive device has a stepped shaft-shaped hub; the center of the hub has a stepped through hole; the right end face of the hub has a blind hole for interference fit with the camshaft; the hub has a stepped through hole. The radial oil hole is connected with the through hole; the center of the camshaft has a pressure lubricating oil passage II connected with the stepped through hole; the left end of the camshaft is an interference fit with the hub, and the right end extends out of the hub and is supported by the camshaft bushing In the body; a front end cover is set on the wheel hub, and a bearing bushing that is clearance matched with the wheel hub is provided between the front end cover and the wheel hub; the gap between the bearing bushing and the wheel hub is connected to the radial oil hole; on the wheel hub There is a driving gear with clearance fit therein; a thrust device is fixed on the left end of the hub. The invention effectively avoids abnormal wear of the camshaft bushing at the driving end and improves the reliability of the camshaft driving device.
Description
技术领域Technical field
本发明属于机械技术领域，具体涉及一种共轨柴油机凸轮轴驱动装置。The invention belongs to the field of mechanical technology, and specifically relates to a common rail diesel engine camshaft driving device.
背景技术Background technique
凸轮轴是柴油机的重要部件，它通过驱动摇臂、气阀机构，控制气阀定时定量地开启和关闭，为柴油机提供缸内燃烧必须的新鲜空气，保证柴油机对外输出动力。The camshaft is an important component of the diesel engine. It drives the rocker arm and the valve mechanism, and controls the valve to open and close regularly and quantitatively. It provides the diesel engine with fresh air necessary for combustion in the cylinder and ensures that the diesel engine outputs power to the outside world.
凸轮轴驱动装置是柴油机配气系统的重要组成部分，它为凸轮轴提供动力，驱动凸轮轴旋转，其设计方法是否合理，直接决定了凸轮轴工作的可靠性;对于许多高速大功率柴油机来说，凸轮轴驱动端附件过多、重量过大，对驱动端的凸轮轴轴承产生较大的弯矩，易造成该处轴承异常磨损；同时，由于主动斜齿轮的轴向推力作用，凸轮轴在工作过程中会产生轴向窜动，这对凸轮轴的正常运转是不利的，必须设计合理的凸轮轴止推装置消除不利影响；对于许多共轨柴油机来说，齿轮箱体内需要布置共轨泵齿轮及其惰轮机构，在这样狭小的空间内，给凸轮轴驱动机构的布置带来很大困难。The camshaft drive device is an important part of the diesel engine gas distribution system. It provides power to the camshaft and drives the camshaft to rotate. Whether its design method is reasonable directly determines the reliability of the camshaft work; for many high-speed and high-power diesel engines , there are too many attachments and excessive weight on the drive end of the camshaft, which will produce a large bending moment on the camshaft bearing on the drive end, easily causing abnormal wear of the bearing there; at the same time, due to the axial thrust of the driving helical gear, the camshaft is working Axial movement will occur during the process, which is detrimental to the normal operation of the camshaft. A reasonable camshaft thrust device must be designed to eliminate the adverse effects; for many common rail diesel engines, common rail pump gears need to be arranged in the gear box. and its idler gear mechanism, which brings great difficulties to the layout of the camshaft drive mechanism in such a small space.
对于高速大功率的共轨柴油机来说，设计合理的凸轮轴驱动装置是许多柴油机设计厂家必须考虑的问题。For high-speed and high-power common rail diesel engines, a reasonably designed camshaft drive device is an issue that many diesel engine designers must consider.
发明内容Contents of the invention
为解决上述技术问题，本发明的目的是提出一种共轨柴油机凸轮轴驱动装置。In order to solve the above technical problems, the purpose of the present invention is to propose a common rail diesel engine camshaft driving device.
本发明采用下述技术方案完成其发明任务：The present invention adopts the following technical solutions to accomplish its inventive tasks:
一种共轨柴油机凸轮轴驱动装置，所述的共轨柴油机凸轮轴驱动装置具有轮毂；所述轮毂为由多段不同直径的圆柱体构成的阶梯轴状结构；多段不同直径的圆柱体由左向右依次为第一圆柱体、第二圆柱体、第三圆柱体和第四圆柱体，并在第一圆柱体的中心具有向左突出的圆形凸台；所述第二圆柱体的直径小于第一圆柱体的直径、第一圆柱体的直径小于第三圆柱体的直径、第三圆柱体的直径小于第四圆柱体的直径；所述轮毂的中心具有阶梯通孔；所述的阶梯通孔由左向右依次为螺纹孔、节流孔、压力润滑油道Ⅰ和油槽；所述节流孔的直径小于所述的螺纹孔的直径；所述螺纹孔的直径与压力润滑油道Ⅰ的直径相同；所述轮毂的右侧端面具有用以与凸轮轴过盈配合的盲孔；所述盲孔底面的中心具有连通压力润滑油道Ⅰ的缺槽；所述的缺槽连通所述的压力润滑油道Ⅰ和油槽；所述轮毂上具有与所述的压力润滑油道Ⅰ连通的径向油孔；所述凸轮轴的中心具有与所述的压力润滑油道Ⅰ相连通的压力润滑油道Ⅱ；所述凸轮轴的左端与所述的轮毂过盈配合，右端伸出所述的轮毂通过凸轮轴衬套支撑在机体内；轮毂的所述第一圆柱体上套置有前端盖，且所述前端盖与轮毂的第一圆柱体之间设置有与第一圆柱体间隙配合的轴承衬套；所述轴承衬套的外圈与所述的前端盖过盈配合，内圈与所述第一圆柱体的外圆间隙配合形成轮毂的浮动支撑；轴承衬套与第一圆柱体之间的间隙连通所述的径向油孔；轮毂的一端与凸轮轴过盈连接，另一端浮动安装在前端盖的所述轴承衬套内，柴油机工作时，轴承衬套与轮毂之间建立了油膜，油膜承载了凸轮轴驱动端各附件的重力，有效避免驱动端凸轮轴衬套的异常磨损；轮毂的所述第三圆柱体上套置有与其间隙配合的驱动齿轮；套置在第三圆柱体上的所述驱动齿轮与轮毂的第四圆柱体固联；所述轮毂的左端固定有止推装置；所述的止推装置具有套置在轮毂左端所述圆形凸台上的连接法兰；所述的连接法兰与所述的圆形凸台间隙配合；所述的连接法兰与所述的轮毂固联；所述的连接法兰与所述的轴承衬套之间设置有止推环；所述的止推环套置在所述第一圆柱体上，并与所述的前端盖固联；所述的止推装置还包括有止推盘；所述的止推盘位于止推环的左侧，并与所述的前端盖固联；所述的前端盖与所述的止推盘外圆之间通过密封圈密封；所述的止推盘为由大直径轴与小直径轴构成的阶梯轴状结构；所述的大直径轴位于小直径轴的左侧；所述止推盘的右侧端面与连接法兰的左侧端面之间具有0.1mm的间隙；所述止推盘右侧端面的中心具有向内凹陷的凹槽；所述的凹槽与轮毂中心所述的螺纹孔连通，形成用以对止推盖和连接法兰的间隙进行润滑的润滑油槽。A common rail diesel engine camshaft driving device, the common rail diesel engine camshaft driving device has a hub; the hub is a stepped shaft-like structure composed of multiple sections of cylinders with different diameters; the multiple sections of cylinders with different diameters are arranged from left to right On the right are a first cylinder, a second cylinder, a third cylinder and a fourth cylinder in order, and there is a circular boss protruding to the left in the center of the first cylinder; the diameter of the second cylinder is smaller than The diameter of the first cylinder is smaller than the diameter of the third cylinder, and the diameter of the third cylinder is smaller than the diameter of the fourth cylinder; the center of the hub has a stepped through hole; the stepped through hole The holes are threaded holes, throttling holes, pressure lubricating oil passage I and oil grooves from left to right; the diameter of the throttling hole is smaller than the diameter of the threaded hole; the diameter of the threaded hole is the same as the pressure lubricating oil passage I have the same diameter; the right end face of the hub has a blind hole for interference fit with the camshaft; the center of the bottom surface of the blind hole has a missing groove that communicates with the pressure lubricating oil passage I; the missing groove communicates with the The pressure lubricating oil passage I and the oil groove; the hub has a radial oil hole connected with the pressure lubricating oil passage I; the center of the camshaft has a pressure lubricating oil passage connected with the pressure lubricating oil passage I Lubricating oil channel II; the left end of the camshaft is an interference fit with the hub, and the right end extends out of the hub and is supported in the body through the camshaft bushing; a front end is set on the first cylinder of the hub cover, and a bearing bushing that has a clearance fit with the first cylinder is provided between the front end cover and the first cylinder of the hub; the outer ring of the bearing bushing has an interference fit with the front end cover, and the inner ring It cooperates with the outer circle clearance of the first cylinder to form a floating support of the wheel hub; the gap between the bearing bushing and the first cylinder is connected to the radial oil hole; one end of the wheel hub is interference connected with the camshaft, and the other end is interference connected with the camshaft. One end is floatingly installed in the bearing bushing of the front end cover. When the diesel engine is working, an oil film is established between the bearing bushing and the wheel hub. The oil film carries the gravity of the accessories on the drive end of the camshaft, effectively avoiding damage to the camshaft bushing on the drive end. Abnormal wear and tear; the third cylinder of the wheel hub is covered with a driving gear that has a clearance fit with it; the driving gear placed on the third cylinder is firmly connected to the fourth cylinder of the wheel hub; the left end of the wheel hub A thrust device is fixed; the thrust device has a connecting flange nested on the circular boss at the left end of the wheel hub; the connecting flange has a clearance fit with the circular boss; the The connecting flange is fixedly connected to the hub; a thrust ring is provided between the connecting flange and the bearing bushing; the thrust ring is placed on the first cylinder, and Fixedly connected with the front end cover; the thrust device also includes a thrust plate; the thrust plate is located on the left side of the thrust ring and is fixedly connected with the front end cover; the front end The cover and the outer circle of the thrust plate are sealed by a sealing ring; the thrust plate is a stepped shaft-like structure composed of a large diameter shaft and a small diameter shaft; the large diameter shaft is located between the small diameter shaft and On the left side; there is a gap of 0.1mm between the right end face of the thrust plate and the left end face of the connecting flange; the center of the right end face of the thrust plate has an inwardly concave groove; the concave The groove is connected with the threaded hole in the center of the hub to form a lubricating oil groove for lubricating the gap between the thrust cover and the connecting flange.
所述驱动齿轮的中心具有与轮毂间隙配合的通孔；所述驱动齿轮的外圆均布有若干个用以与共轨柴油机的主动斜齿轮吻配的斜齿；所述驱动齿轮上具有用于与轮毂固联的连接通孔；所述的连接通孔为沿通孔轴线均布的多个；所述驱动齿轮上还具有用以与轮毂固联的定位销孔。The center of the driving gear has a through hole that fits with the hub; the outer circumference of the driving gear is evenly distributed with a number of helical teeth for matching the driving helical gear of the common rail diesel engine; the driving gear has a A connection through hole is fixedly connected to the wheel hub; the connection through holes are multiple evenly distributed along the axis of the through hole; the driving gear also has a positioning pin hole for being fixedly connected to the wheel hub.
轮毂的所述第四圆柱体上具有多个用于与驱动齿轮固联的连接孔和一个销孔。The fourth cylinder of the hub has a plurality of connecting holes and a pin hole for firmly connecting with the driving gear.
所述的连接法兰为中心具有通孔的圆盘，且连接法兰中心所述的通孔与轮毂上所述的圆形凸台间隙配合。The connecting flange is a disc with a through hole in the center, and the through hole in the center of the connecting flange is in clearance fit with the circular boss on the hub.
本发明提出的一种共轨柴油机凸轮轴驱动装置，采用上述技术方案，具有如下有益效果：The common rail diesel engine camshaft driving device proposed by the present invention adopts the above technical solution and has the following beneficial effects:
1）轮毂的一端与凸轮轴过盈连接，另一端在前端盖的轴承衬套内孔里浮动安装，柴油机工作时，轴承衬套与轮毂之间建立了油膜，油膜承载了凸轮轴驱动端各附件的重力，有效避免了驱动端凸轮轴衬套的异常磨损；提高了凸轮轴驱动装置的可靠性；1) One end of the wheel hub is interference-connected with the camshaft, and the other end is floatingly installed in the inner hole of the bearing bushing of the front end cover. When the diesel engine is working, an oil film is established between the bearing bushing and the wheel hub, and the oil film carries the various components of the camshaft driving end. The gravity of the attachment effectively avoids abnormal wear of the camshaft bushing at the drive end; improves the reliability of the camshaft drive device;
2）对于许多共轨柴油机来说，齿轮箱体内需要布置共轨泵齿轮及其惰轮机构，这就要求凸轮轴驱动装置在与之重叠的区域防止干涉；本技术方案中，轮毂的一端与凸轮轴过盈连接，因此不需要在轮毂上布置螺钉与凸轮轴连接，使轮毂右侧第三阶梯轴的外圆直径大幅缩小，解决了驱动装置与其他齿轮部件干涉的问题；2) For many common rail diesel engines, the common rail pump gear and its idler mechanism need to be arranged in the gear box, which requires the camshaft drive device to prevent interference in the overlapping area; in this technical solution, one end of the hub and The camshaft has an interference connection, so there is no need to arrange screws on the hub to connect to the camshaft, which greatly reduces the outer diameter of the third stepped shaft on the right side of the hub, solving the problem of interference between the drive device and other gear components;
3）柴油机工作时，凸轮轴驱动齿轮3在主动斜齿轮的轴向推力作用，沿凸轮轴轴向窜动，若不控制窜动量，将会加剧凸轮轴衬套、凸轮与挺柱等零件的磨损；本技术方案设置止推装置，并在止推盘与连接法兰之间、连接法兰与止推环之间设计了合理的间隙，使凸轮轴在沿轴向向左或向右窜动时，其窜动量都是可控的。3) When the diesel engine is working, the camshaft drive gear 3 moves axially along the camshaft due to the axial thrust of the driving helical gear. If the amount of movement is not controlled, the damage to the camshaft bushing, cam, tappet and other parts will be aggravated. Wear; This technical solution is equipped with a thrust device, and a reasonable gap is designed between the thrust plate and the connecting flange, and between the connecting flange and the thrust ring, so that the camshaft can move left or right along the axial direction. When moving, its momentum is controllable.
4）为避免轴承衬套与轮毂之间、止推组件之间产生异常磨损，本技术方案设计了压力润滑通道，即带有一定压力的机油从凸轮轴中间油孔流经轮毂中心孔，然后一部分机油通过轮毂上的径向油孔进入轴承衬套与轮毂的工作轴颈之间实现压力润滑，另一部分通过节流孔，进入止推盘的空腔，并流入止推盘与连接法兰之间、连接法兰与止推环之间实现压力润滑。4) In order to avoid abnormal wear between the bearing bushing and the hub, and between the thrust components, this technical solution designs a pressure lubrication channel, that is, engine oil with a certain pressure flows from the middle oil hole of the camshaft through the center hole of the hub, and then Part of the engine oil enters the space between the bearing bushing and the working journal of the wheel hub through the radial oil hole on the wheel hub to achieve pressure lubrication. The other part enters the cavity of the thrust plate through the throttle hole and flows into the thrust plate and the connecting flange. Pressure lubrication is achieved between the connecting flange and the thrust ring.
5）止推环、连接法兰、止推盘均为消耗件，都有一定的寿命周期，需要定期检修或更换；本发明中凸轮轴止推组件设计在前端盖的外侧，在拆卸时，只需要依次拆掉紧固螺栓Ⅱ、止推盘、紧固螺栓Ⅰ、连接法兰、止推环，即完成了所以止推组件的拆卸，安装方法与之步骤相反，整个拆卸或安装过程中，不需要拆卸前端盖等复杂零件，拆装简便、且省时省力，具有良好的可维修性。5) The thrust ring, connecting flange and thrust plate are all consumable parts and have a certain life cycle and require regular maintenance or replacement. In the present invention, the camshaft thrust assembly is designed on the outside of the front end cover. When disassembled, It is only necessary to remove the fastening bolt II, thrust plate, fastening bolt I, connecting flange, and thrust ring in order to complete the disassembly of all thrust components. The installation method is the opposite of the steps. During the entire disassembly or installation process , there is no need to disassemble complex parts such as the front end cover, it is easy to disassemble and assemble, saves time and effort, and has good maintainability.
附图说明Description of the drawings
图1为本发明的结构示意图。Figure 1 is a schematic structural diagram of the present invention.
图2为本发明中轮毂的结构示意图。Figure 2 is a schematic structural diagram of the wheel hub in the present invention.
图中：1、轮毂；1-1、第一圆柱体，1-2、第二圆柱体，1-3、第三圆柱体，1-4、第四圆柱，1-5、圆形凸台，1-6、螺纹孔，1-7、节流孔，1-8、压力润滑油道Ⅰ，1-9、径向油孔，2、夹紧销；3、驱动齿轮；4、紧固螺栓Ⅰ；5、轴承衬套；6、定位销；7、止推环；8、连接法兰；9、紧固螺栓Ⅱ；10、止推盘；11、密封圈，12、凸轮轴，12-1、压力润滑油道Ⅱ，13、凸轮轴衬套，14、机体，15、前端盖。In the picture: 1. Hub; 1-1, first cylinder, 1-2, second cylinder, 1-3, third cylinder, 1-4, fourth cylinder, 1-5, circular boss , 1-6, threaded hole, 1-7, orifice, 1-8, pressure lubricating oil channel I, 1-9, radial oil hole, 2, clamping pin; 3, drive gear; 4, fastening Bolt I; 5. Bearing bushing; 6. Positioning pin; 7. Thrust ring; 8. Connecting flange; 9. Fastening bolt II; 10. Thrust plate; 11. Seal ring, 12. Camshaft, 12 -1. Pressure lubricating oil passage II, 13. Camshaft bushing, 14. Body, 15. Front end cover.
具体实施方式Detailed ways
下面结合附图对本发明的具体实施方式作进一步的说明：The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings:
如图1所示，一种共轨柴油机凸轮轴驱动装置，所述的共轨柴油机凸轮轴驱动装置具有轮毂1；结合图2，所述轮毂1为由多段不同直径的圆柱体构成的阶梯轴状结构；多段不同直径的圆柱体由左向右依次为第一圆柱体1-1、第二圆柱体1-2、第三圆柱体1-3和第四圆柱体1-4，并在第一圆柱体1-1的中心具有向左突出的圆形凸台1-5；所述第二圆柱体1-2的直径小于第一圆柱体1-1的直径、第一圆柱体1-1的直径小于第三圆柱体1-3的直径、第三圆柱体1-3的直径小于第四圆柱体1-4的直径；所述轮毂1的中心具有阶梯通孔；所述的阶梯通孔由左向右依次为螺纹孔1-6、节流孔1-7、压力润滑油道Ⅰ1-8和油槽；所述节流孔1-7的直径小于所述的螺纹孔1-6的直径；所述螺纹孔1-6的直径与压力润滑油道Ⅰ1-8的直径相同；所述轮毂1的右侧端面具有用以与凸轮轴过盈配合的盲孔；所述盲孔底面的中心具有连通压力润滑油道Ⅰ1-8的缺槽；所述的缺槽连通所述的压力润滑油道Ⅰ1-8和油槽；所述轮毂1上具有与所述的压力润滑油道Ⅰ连通的径向油孔1-9；所述凸轮轴12的中心具有与所述的压力润滑油道Ⅰ1-9相连通的压力润滑油道Ⅱ12-1；所述凸轮轴12的左端与所述的轮毂1过盈配合，右端伸出所述的轮毂1通过凸轮轴衬套13支撑在机体14内；轮毂的所述第一圆柱体1-1上套置有前端盖15，且所述前端盖15与轮毂的第一圆柱体之间设置有与第一圆柱体间隙配合的轴承衬套5；所述轴承衬套5的外圈与所述的前端盖15过盈配合，内圈与所述第一圆柱体的外圆间隙配合形成轮毂的浮动支撑；轴承衬套5与第一圆柱体之间的间隙连通所述的径向油孔1-9；轮毂1的一端与凸轮轴12过盈连接，另一端浮动安装在前端盖的所述轴承衬套5内，柴油机工作时，轴承衬套与轮毂之间建立了油膜，油膜承载了凸轮轴驱动端各附件的重力，有效避免驱动端凸轮轴衬套的异常磨损；轮毂的所述第三圆柱体1-3上套置有与其间隙配合的驱动齿轮3；套置在第三圆柱体上的所述驱动齿轮3通过紧固螺栓Ⅰ4和夹紧销2与轮毂的第四圆柱体1-4固联；所述的紧固螺栓Ⅰ4为十个；所述的夹紧销2为一个；所述轮毂1的左端固定有止推装置；所述的止推装置具有套置在轮毂左端所述圆形凸台1-5上的连接法兰8；所述的连接法兰为中心具有通孔的圆盘，且连接法兰中心所述的通孔与轮毂上所述的圆形凸台1-5间隙配合；所述的连接法兰8与所述的轮毂1固联；所述的连接法兰8与所述的轴承衬套5之间设置有止推环7；所述的止推环7套置在所述第一圆柱体1-1上，并通过定位销6与所述的前端盖15固联；所述的止推装置还包括有止推盘10；所述的止推盘10位于止推环7的左侧，并与所述的前端盖15固联；所述的前端盖15与所述的止推盘外圆之间通过密封圈11密封；所述的止推盘10为由大直径轴与小直径轴构成的阶梯轴状结构；所述的大直径轴位于小直径轴的左侧；所述止推盘的右侧端面与连接法兰的左侧端面之间具有0.1mm的间隙；所述止推盘右侧端面的中心具有向内凹陷的凹槽；所述的凹槽与轮毂中心所述的螺纹孔连通，形成用以对止推盖和连接法兰的间隙进行润滑的润滑油槽。As shown in Figure 1, a common rail diesel engine camshaft driving device has a hub 1; combined with Figure 2, the hub 1 is a stepped shaft composed of multiple sections of cylinders with different diameters. -like structure; multiple sections of cylinders with different diameters are the first cylinder 1-1, the second cylinder 1-2, the third cylinder 1-3 and the fourth cylinder 1-4 from left to right, and in the The center of a cylinder 1-1 has a circular boss 1-5 protruding to the left; the diameter of the second cylinder 1-2 is smaller than the diameter of the first cylinder 1-1. The diameter of the hub 1 is smaller than the diameter of the third cylinder 1-3, and the diameter of the third cylinder 1-3 is smaller than the diameter of the fourth cylinder 1-4; the center of the hub 1 has a stepped through hole; the stepped through hole From left to right are threaded holes 1-6, orifices 1-7, pressure lubricating oil passages I1-8 and oil grooves; the diameter of the orifice 1-7 is smaller than the diameter of the threaded hole 1-6 ; The diameter of the threaded holes 1-6 is the same as the diameter of the pressure lubricating oil channel I1-8; the right end face of the hub 1 has a blind hole for interference fit with the camshaft; the center of the bottom surface of the blind hole There is a missing groove communicating with the pressure lubricating oil passage I1-8; the missing groove communicates the pressure lubricating oil passage I1-8 and the oil groove; the hub 1 has a diameter that communicates with the pressure lubricating oil passage I Oil hole 1-9; the center of the camshaft 12 has a pressure lubricating oil passage II12-1 connected with the pressure lubricating oil passage I1-9; the left end of the camshaft 12 is connected to the hub 1 Interference fit, the right end of the wheel hub 1 protruding out is supported in the body 14 through the camshaft bushing 13; a front end cover 15 is set on the first cylinder 1-1 of the wheel hub, and the front end cover 15 and A bearing bushing 5 is provided between the first cylinders of the hub with a clearance fit between the first cylinders; the outer ring of the bearing bushing 5 has an interference fit with the front end cover 15, and the inner ring has an interference fit with the first cylinder. The outer circle clearance of the cylinder forms the floating support of the wheel hub; the gap between the bearing bushing 5 and the first cylinder is connected to the radial oil holes 1-9; one end of the wheel hub 1 is interference connected with the camshaft 12, The other end is floatingly installed in the bearing bushing 5 of the front end cover. When the diesel engine is working, an oil film is established between the bearing bushing and the wheel hub. The oil film carries the gravity of the accessories at the drive end of the camshaft, effectively preventing the camshaft bushing from being driven. Abnormal wear of the sleeve; the third cylinder 1-3 of the hub is sleeved with a driving gear 3 that fits with it; the driving gear 3 sleeved on the third cylinder is clamped by fastening bolts I4 and The pin 2 is firmly connected with the fourth cylinder 1-4 of the hub; the number of the fastening bolts I4 is ten; the number of the clamping pin 2 is one; the left end of the hub 1 is fixed with a thrust device; The thrust device has a connecting flange 8 nested on the circular boss 1-5 at the left end of the wheel hub; the connecting flange is a disc with a through hole in the center, and the through hole in the center of the connecting flange The hole has a clearance fit with the circular boss 1-5 on the wheel hub; the connecting flange 8 is firmly connected to the wheel hub 1; the connection flange 8 is connected to the bearing bushing 5. A thrust ring 7 is provided; the thrust ring 7 is placed on the first cylinder 1-1 and is firmly connected to the front end cover 15 through the positioning pin 6; the thrust device also It includes a thrust plate 10; the thrust plate 10 is located on the left side of the thrust ring 7 and is firmly connected to the front end cover 15; the front end cover 15 is between the outer circle of the thrust plate and the thrust plate 10. It is sealed by a sealing ring 11; the thrust plate 10 is a stepped shaft-like structure composed of a large diameter shaft and a small diameter shaft; the large diameter shaft is located on the left side of the small diameter shaft; the thrust plate 10 There is a gap of 0.1mm between the right end face and the left end face of the connecting flange; the center of the right end face of the thrust plate has an inwardly concave groove; the groove is connected to the threaded hole in the center of the hub Connected to form a lubricating oil groove for lubricating the gap between the thrust cover and the connecting flange.
所述驱动齿轮的中心具有与轮毂间隙配合的通孔；所述驱动齿轮的外圆均布有若干个用以与共轨柴油机的主动斜齿轮吻配的斜齿；所述驱动齿轮上具有用于与轮毂固联的连接通孔；所述的连接通孔为沿通孔轴线均布的多个；所述驱动齿轮上还具有用以与轮毂固联的定位销孔。The center of the driving gear has a through hole that fits with the hub; the outer circumference of the driving gear is evenly distributed with a number of helical teeth for matching the driving helical gear of the common rail diesel engine; the driving gear has a A connection through hole is fixedly connected to the wheel hub; the connection through holes are multiple evenly distributed along the axis of the through hole; the driving gear also has a positioning pin hole for being fixedly connected to the wheel hub.
轮毂的所述第四圆柱体上具有多个用于与驱动齿轮固联的连接孔和一个销孔。The fourth cylinder of the hub has a plurality of connecting holes and a pin hole for firmly connecting with the driving gear.
为避免轴承衬套5与轮毂1之间、止推组件之间产生异常磨损，本发明使用时，带有一定压力的机油从凸轮轴中间的压力润滑油道Ⅱ流经轮毂1的压力润滑油道Ⅰ，然后一部分机油通过轮毂上的径向油孔进入轴承衬套5与轮毂1的工作轴颈之间实现压力润滑，另一部分通过节流孔，进入止推盘的凹槽，并流入止推盘10与连接法兰8之间、连接法兰8与止推环7之间实现压力润滑。In order to avoid abnormal wear between the bearing bushing 5 and the wheel hub 1 and between the thrust components, when the present invention is used, engine oil with a certain pressure flows from the pressure lubricating oil passage II in the middle of the camshaft through the pressure lubricating oil of the wheel hub 1 Channel I, then part of the engine oil enters between the bearing bushing 5 and the working journal of the wheel hub 1 through the radial oil hole on the wheel hub to achieve pressure lubrication, and the other part passes through the throttle hole, enters the groove of the thrust plate, and flows into the stop Pressure lubrication is achieved between the push plate 10 and the connecting flange 8, and between the connecting flange 8 and the thrust ring 7.
Claims (4)
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|---|---|---|---|
| CN201810987577.4A CN108915814B (en) | 2018-08-28 | 2018-08-28 | Cam shaft driving device of common rail diesel engine |
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| CN201810987577.4A CN108915814B (en) | 2018-08-28 | 2018-08-28 | Cam shaft driving device of common rail diesel engine |
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| CN112431646B (en) * | 2020-12-30 | 2024-12-20 | 潍柴动力扬州柴油机有限责任公司 | Camshaft gear end support device for improving camshaft load-bearing capacity |
| CN115095461A (en) * | 2022-07-18 | 2022-09-23 | 中船动力镇江有限公司 | Starting valve of high-power diesel engine |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208950659U (en) * | 2018-08-28 | 2019-06-07 | 河南柴油机重工有限责任公司 | A kind of common rail diesel engine camshaft drive |
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| JPS648508U (en) * | 1987-07-07 | 1989-01-18 | ||
| US5111780A (en) * | 1988-07-15 | 1992-05-12 | Audi Ag | Drive arrangement for a camshaft in an internal combustion engine |
| JPH10196322A (en) * | 1997-01-17 | 1998-07-28 | Mitsubishi Motors Corp | Engine cam control device |
| DE10141213A1 (en) * | 2001-08-23 | 2003-03-06 | Bayerische Motoren Werke Ag | Arrangement of a camshaft in the cylinder head of an internal combustion engine |
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