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双柱式举升器 设计 汽车 举升机

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双柱式举升器的设计【汽车举升机】,双柱式举升器,设计,汽车,举升机

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附录A A brand of a particular model of moveOr machines, in different places Side, at different times, more than once There have been entrusted to the side under the arm of a sudden Slip off, causing people, vehicles of the two injured Accident. After the lifting of the failure Machine testing, analysis, and found the existence of Design flaws. It is a mechanical lifting Machine, the drive screw nut from The main drive nut care arm movement Taking off and landing vehicle. In addition to cutting off power Motive power to stop drive screw Automotive Lift Fly Peach Failure Analysis I Nantong Products Quality Supervision and Inspection and the Lei Zou Shields can be observed. In order to effectively To protect the security, automotive lift Should stop the browser and the backstop. From The Brand Lift of the occurrence of several Lapsed since the incident, the principal, Vice-nut at the same time lead to wear and tear due to strong Decreases occurred in the thread root cut Letter, which of course, and materials selection, Manufacturing quality, the use of maintenance due to Su-relevant, but imagine if Is an independent work of the backstop , And even in the absence of Vice-nut, so that The possibility of a thing you Moment of downtime in order to achieve things, it does not work independently of the stop device and the backstop , And only made use of the role of self-locking screw to prevent the decline in our care arm Know that the conditions for self-locking thread is the thread friction angle or Chaetoceros. Its an But to protect the whole body is fitted with a nut in the bottom of the main vice of the so-called Nut, through institutions linked synchronous rotation with the main nut. There is no denying that when the Lord, Vice-nut There is a certain gap between the, if nut the main event of an accident, child care Vice-nut will be on the arm and not the accidents. However, the main, the Deputy nut As the gap between the main nut and gradually reduce the wear and tear, when reduced to a Certain extent, it must be replaced with new ones of the main nut, otherwise, continue to use When the owners go, the gap between the Deputy nut completely disappear, the Lord, is Vice-nut Quality has become one, and act as security devices has been gradually Vice nut Until all the nuts to replace the main workload. At this point if an accident such as Thread occur due to wear and cut the root, see the attached map, security protection devices can play It should be the role to be sure, if the timely replacement of the main nut, can be avoided Some accidents, but not all users have the professional knowledge and Lord, the gap between the Vice-nut is not clear at a glance from the outside can, it is necessary to disassemble Therefore, the use of cars to check whether the lift should be independent Work backstop safety protection device, if not, be sure to strengthen the Inspection and timely replacement of drive nut to avoid accidents. The manufacturers, but also Should be to improve the design and use of backstop, such as pallet rack style, convenient and practicalresults Yes. Changes in the scope of separation relatively fixed itinerary, when separated from a trip to meet a very Limits, we will feel separated from the heavy foot pedal fixed. Mainly due to spiral Spring has been pressed, the lever for the rigid separation of parts is not easy deformation, and the diaphragm clutch Separation, the diaphragm spring bearing ring rotating around the larger scope, there is no separation Limit structure, membrane separation shaped toe There is a certain variable, so diaphragm clutch Separation itinerary changes provide a scope of the right table. Separation does not trip Separation often exceeds the maximum trip, as it would increase the diaphragm spring dish Some changes in the amplitude of alternating stress, which is the alternating stress fatigue diaphragm spring break Split the direct cause of failure. Therefore, as long as the clutch feel, there is no need to artificially increase the Separation tour, which diaphragm clutch diaphragm spring is one of the most useful security Care. In order to facilitate the light of the above patch to play a greater effectiveness of the clutch must be To do regular checks of 2.1 to adjust the clutch to prevent the separation of space 2 Diaphragm clutch travel too large.附录C汽车举升机失效性分析某一品牌某型号的举升机，在不同的地方、不同的时间、不止一次的发生过单侧托臂突然下落滑， 造成人、车两伤的事故。经过对失效的举升机检测、分析, 发现其存在设计上的缺陷。该机为机械式举升机, 采用螺杆螺母传动, 由主螺母带动托臂运动实现汽车升降的。除了切断电动机的电源停止带动螺杆汽车举升飞桃失效分析口南通市产品质量监督检验所邹雷护罩才能观察到。为有效地保障安全, 汽车举升机应有停止器与逆止器。该品牌的举升机发生的数起失效事故看, 都是主、副螺母同时因磨损导致强度降低发生了螺纹根切所致, 这固然与材料的选用、制造质量、使用维护等因素有关, 但设想一下若是具有独立工作的逆止器, 即使没有副螺母, 这样的事有可能发生吗转动以实现停机外, 该机并无独立工作的停止器与逆止器, 只是利用了螺纹的自锁作用来防止托臂下滑的本文知道, 螺纹自锁的条件是螺纹的升角毛摩擦角。它的安全保护机构不过是了一只装在主螺母下方的所谓的副螺母, 通过连动机构与主螺母同步转动。不可否认, 当主、副螺母之间存在一定的间隙时, 若主螺母发生意外时, 托臂将落在副螺母上而不致于发生意外。但是, 主、副螺母之间的间隙随着主螺母的磨损而逐渐减少, 当减少到一定程度时, 就必须更换新的主螺母, 不然的话, 继续使用下去而当主、副螺母间的间隙完全消失时, 主、副螺母实质上已成为一体了, 充当安全保护装置的副螺母已逐渐直至全部接替了主螺母的工作负荷。此时若发生意外如螺纹因磨损而发生根切, 见附图, 安全保护装置能否起到应有的作用呢诚然, 若能及时更换主螺母, 可以避免一些事故的发生, 但使用者并非都具有专业知识, 而且主、副螺母之间的间隙并非从外面可以一目了然, 要拆开因此, 使用汽车举升机时应检查一下是否具有独立工作的安全保护装置逆止器, 如若没有的话, 务必加强检查, 及时更换传动螺母, 以免发生意外。对厂家而言, 也应改进设计, 采用逆止器如齿条棘爪式, 方便实用, 效果不错。器分离行程变动范围比较固定, 当分离行程达到某一极限值时, 会感觉到分离踏板沉重踩不动。主