限位开关就是用以限定机械设备的运动****限位置的电气开关。限位开关有接触式的和非接触式的。接触式的比较直观，机械设备的运动部件上，安装上行程开关，与其相对运动的固*上安装****限位置的挡块，或者是相反安装位置。当行程开关的机械触头碰上挡块时，切断了（或改变了）控制电路，机械就停止运行或改变运行。由于机械的惯性运动，这种行程开关有一定的“超行程”以保护开关不受损坏。非接触式的形式很多，常见的有干簧管、光电式、感应式等，这几种形式在电梯中都能够见到。当然还有更多的****形式。限位开关是一种常用的小电流主令电器。利用生产机械运动部件的碰撞使其触头动作来实现接通或分断控制电路，达到一定的控制目的。通常，这类开关被用来限制机械运动的位置或行程，使运动机械按一*置或行程自动停止、反向运动、变速运动或自动往返运动等。在电气控制系统中，限位开关的作用是实现顺序控制、*控制和位置状态的检测。用于控制机械设备的行程及限位保护。构造：由操作头、触点系统和外壳组成。

------------------------------------------------------------------------------------------------

v  陕西欣鸿然自动化设备有限公司

v  联系人:宁超         热  线：029-83338136

v  手 机：15339052544  *1293858601       

v  邮箱:1293858601@** 传真:029-83561013 

------------------------------------------------------------------------------------------------

Limit switch working limit switch and limit switch, limit switch is used to give the work mechani* of action in place signal. Limit switch is to prevent the agency beyond the scope of design and accident. Work limit switches are installed in the *ition of the mechani* to change the conditi*witch, signal is given, for other related acti*. Limit switch installed in the mos*stal moveme*f mechani*, to protect the mechani* of action is too large there is damaged.

The main part of the switch is com*ed of the following materials

Mark of part*aterials

Contact Au corrosion resistance is superior, for *all load. Because of its soft texture (Vivtorinox hardness HV25 ~ 65), it is easy to adhesion (contact adhesive), and in the contact force under the condition of large contact easy to sag.

Alloy of gold, silver, 10% silver gold alloy AuAg 90% corrosion resistance is very good, hardness is HV30 ~ 90, higher than the gold, so it is widely used in *all load switch.

Platinum, gold, silver, 69% gold, 25% silver alloy PGS, 6% platinum alloy, corrosion resistance is very good, hardness is also the same with gold and silver alloy, widely used in *all load switch. Known as the "No. 1 alloy".

Silver palladium alloy AgPd, good corrosion resistance, but it is easy to adsorb organic gas generation polymer. 50% silver, 50% case of palladium, hardness is HV100 ~ 200.

Silver Ag electrical conductivity, thermal conductivity is one of the largest in the metal. Although the exhibit lower contact resistance, but the drawback*easy to generate sulfide film in sulfide gases in the environment, in the *all load area is easy to produce bad. Hardness is HV25 ~ 45. For more general load switch.

Silver, nickel alloy AgNi 90% silver, 10% silver, nickel and silver nickel alloy electric conductivity in close, arc resistance, excelle*esistance to melting. Hardness is HV65 ~ 115.

Silver, indium, tin alloy AgInSn hardness, high melting point, excellent arc resistance, not easy to melt or transfer.

The movable spring, the movable plate spring with phosphor bronze C5210 rolling resistance, fatigue resistance and corrosion resistance. H*e carried out annealing treatment. If the spring critical value (Kb0.075) of C5210-H i*ore than 40kgf/mm2, C5210-EH i*ore than 47kgf/mm2, the lower, are widely used in the *all micro switch.

VXF31.25  VXF31.39  VXF31.40  VXF31.50  VXF31.65  VXF31.80  VXF31.90 VXF31.91 

VXF31.92  VXF40.100-124  VXF40.125-200  VXF40.150-300  VXF40.15-1.9  VXF40.15-3 

VXF40.25-5  VXF40.25-7.5  VXF40.40-12  VXF40.40-19  VXF40.50-31  VXF40.65-49 

VXF40.80-78  VXF41.25  VXF41.25(4)  VXF41.40  VXF41.40(4)  VXF41.49  VXF41.49(4) 

VXF41.50  VXF41.50(4)  VXF41.65  VXF41.65(4)  VXF41.80  VXF41.80(4) 

VXF41.90  VXF41.90(4)  VXF41.91  VXF41.91(4)  VXF41.92  VXF41.92(4)   

NHR-M41-27/X-0/X-A    NHR-M41-27/X-0/X-D

      NHR-M41-28/X-0/X-A    NHR-M41-28/X-0/X-D

      NHR-M41-29/X-0/X-A    NHR-M41-29/X-0/X-D

      NHR-M41-30/X-0/X-A    NHR-M41-30/X-0/X-D

      NHR-M41-31/X-0/X-A    NHR-M41-31/X-0/X-D

      NHR-M41-32/X-0/X-A    NHR-M41-32/X-0/X-D

      NHR-M41-33/X-0/X-A    NHR-M41-33/X-0/X-D

      NHR-M41-34/X-0/X-A    NHR-M41-34/X-0/X-D

      NHR-M41-35/X-0/X-A    NHR-M41-35/X-0/X-D

      NHR-M41-25/X-0/0-A    NHR-M41-25/X-0/0-D

      NHR-M41-26/X-0/0-A    NHR-M41-26/X-0/0-D

      NHR-M41-27/X-0/0-A    NHR-M41-27/X-0/0-D

      NHR-M41-28/X-0/0-A    NHR-M41-28/X-0/0-D

      NHR-M41-29/X-0/0-A    NHR-M41-29/X-0/0-D

      NHR-M41-30/X-0/0-A    NHR-M41-30/X-0/0-D

      NHR-M41-31/X-0/0-A    NHR-M41-31/X-0/0-D

      NHR-M41-32/X-0/0-A    NHR-M41-32/X-0/0-D

      NHR-M41-33/X-0/0-A    NHR-M41-33/X-0/0-D

      NHR-M41-34/X-0/0-A    NHR-M41-34/X-0/0-D

      NHR-M41-35/X-0/0-A    NHR-M41-35/X-0/0-D

      NHR-M41-25/X-0/1-A    NHR-M41-25/X-0/1-D

有大忠者，有次忠者，有下忠者，有*者：以德覆君而化之，大忠也；以德 调君而辅之，次忠也；以是谏非而怒之，下忠也；不恤君之荣辱，不恤国之臧否， *以持禄养交而已耳，*也。若周公之于成王也，可谓大忠矣；若管仲之 于桓公，可谓次忠矣；若子胥之于夫差，可谓下忠矣；若曹触龙之于纣者，可谓*矣。

仁者必敬人。凡人非贤，则案不肖也。人贤而不敬，则是禽兽也；人不肖而不 敬，则是狎虎也。禽兽则乱，狎虎则危，灾及其身矣。诗曰：“不敢暴虎，不敢冯 河。人知其一，莫知其它。战战兢兢－－如临深渊，如履薄冰。”此之谓也。故仁 者必敬人。敬人有道，贤者则贵而敬之，不肖者则畏而敬之；贤者则亲而敬之，不 肖者则疏而敬之。其敬一也，其情二也。若夫忠信端悫，而不害伤，则无接而不然， 是仁人之质也。忠信以为质，端悫以为统，礼义以为文，伦类以为理，喘而言，臑 而动，而一可以为法则。诗曰：“不僭不贼，鲜不为则。”此之谓也。

恭敬、礼也；调和、乐也；谨慎、利也；斗怒、害也。故君子安礼乐利，谨慎 而无斗怒，是以百举而不过也。－－小人反是。

通忠之顺，权险之平，*之从声，三者非明主莫之能知也。争然后善，戾然 后功，生死无私，致忠而公，夫是之谓通忠之顺，信陵君似之矣。夺然后义，杀然 后仁，上下易位然后贞，功参天地，泽被生民，夫是之谓权险之平，汤武是也。过 而通情，和而无经，不恤是非，不论曲宜，*，迷乱狂生，夫是之谓*之 从声，飞廉恶来是也。传曰：“斩而齐，枉而顺，不同而一。”诗曰：“受小球大 球，为下国缀旒。”此之谓也。