博文

目前显示的是 八月, 2018的博文

Do you know that today is Chinese Valentine's Day- Qi Xi?

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Legend of Niu Lang and Zhi Nu As one of the Chinese four folk legends concerning love, the legend of Niu Lang and Zhi Nu features the Double Seventh Festival.   It is said that Niu Lang was a cowboy who had a kind heart even though he was without living parents. Living with his brother and brother-in-law, he was maltreated. One day, after having been driven out of his home, an old man (in fact a supernatural being), guided him to the sick cattle from heaven. With great care from Niu Lang, the cattle recovered. In order to show gratitude to Niu Lang, the cow helped him get acquainted with Zhi Nu - a fairy from the heaven. They fell in love with each other and married to live a happy life with Niu Lang planting in the field while Zhi Nu did weaving at home. They were also magically given a boy and a girl. However, good times didn't last long because Zhi Nu's deeds were known by the king of the heaven who took her back to heaven. With the cow's help, Niu Lang flew to...

Where Do We Use Rod Ends

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Where Do We Use Rod Ends    Rod end bearings are used at the end of cylinders, linkages, rods and shafts to enable rotations between connecting parts. They generally consist of a spherical inner ring and a hole for mounting shafts. Applications: Rod end bearings are widely used in aerospace, agricultural machinery, automotive, military, automation equipment and many other fields. Most rod ends bearings have been special treated in ways like surface phosphating, galvanizing, chromium plating, padding, spraying and so on, so they have great load capacity and impact resistance ability. Rod end bearings can work properly even if the installation is not correct. Specifications: Load capacity and maximum rotation angle are the two most important indexes of rod end bearings. In most cases, the motion of rod end joint bearings is symmetrical, and the maximum angular misalignment is half of the total side-to-side range. Materials: Metallic materials are made of...

The History of Rod Ends

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    Although the WWII happened 80 years ago, but because of the trauma it caused, people still cannot help shivering when they are talking it. However, if we look at the war from a different perspective, we will make different discoveries. War is the catalyst of technology, penicillin, radar, computer, nuclear energy… Many of the technologies that changed our lives today actually came from World War II. In 1940, the Allied forces shot down a Nazi’s plane, after thorough examination, they discovered a strange but unique device which was designed by the famous German aircraft designer, Merserschitt… Henceforth, Rod ends came into people’s sight.   After WW II, the U.S. government authorized a company, H.G. Heim, to produce the rod ends. Until now, Rod ends are still called “Heim Joints” by a lot of people. In the year of 1950, the Korean War broke out, the United States started running like a powerful war machine and a large number of rod ends were produced to ...
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Rod Ends Market: Global Industry Analysis and Forecast O verview : Rod ends also known as heim joints or rose joints are a type of bearing used in oscillating assemblies to reduce friction. It consists of a bearing mostly spherical, in the eye-shaped head of the rod end housing with integral shank. The rod ends misalign axially and thus allows the machinery to work efficiently even under misaligned or oscillating conditions. The other advantages of rod ends are it helps in eliminating edge stress and the excessive stress caused by adjacent components within a working machinery. The rod ends can constitute of plain spherical, ball or roller bearing. The sliding surface of the bearing is mirror finished and hence it smoothly can rotate within the housing. The rod ends can be non-lubricating or self-lubricating. The non-lubricating rod ends are made up of steel and are used in applications which has shock loads, alternating heavy loads or static heavy loads. The non-lubricati...

Why are Rod Ends and Spherical Bearings Teflon Lined?

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A PTFE liner in a spherical bearing or rod end is a component that allows the unit to be “self-lubricating”. Metal on metal bearings need to be lubricated. In certain applications this can be difficult to accomplish. Grease lubrication attracts dirt and may prematurely wear apposing metal surfaces. Excessive wear will produce increased fatigue and ultimately leads to an expensive failure. A PTFE liner eliminates the need to lubricate spherical and rod end bearings. A PTFE liner usually consists of a base fabric containing PTFE that is applied to a metal surface with a bonding resin. The liner is adhered to the inner portion of the bearings outer race(Body). This allows the ball to ride on the surface of the liner. When the ball moves it literally rubs on the liner providing the bearings’ lubrication. It is important to understand that an exceptionally good PTFE liner will have a minimum compressive strength of 40,000 psi. A liner of this type greatly reduces internal clearance b...

Why Do We Use heim Joints in ATV and Racing Vehicles

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  A lot of technologies we are using today were invented during WW2, including computers, ATMs,Penicillin,etc. Heim joint, also known as rod end and rose joint were developed in WW2 by German armies.   Heim joints are vastly used in ATV,UTV and other kind of racing vehicles. Because They permit the rod passingthrough it to be misaligned to a limited degree.  Heim joints  provide necessary degree of freedom to A arms and other components.   They can be easily replaced.  They are economical.

What Kind of Ball Joints is the Best for Off-Road Vehicles

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  Basic Situation: An off-road racing vehicle weighs about 2 tons with the driver inside, most of its weight is distributed on the frame (body), the frame is connected to the pillar and wheels through the suspension system (all kinds of forked arms and swinging links). Ball joints are often used to connect the suspension system with the body and pillar. They connect different parts of a vehicle just like the joints that connect different parts of our body, from here we can see the importance of ball joints. Moreover, the vehicle is like an athlete who needs to jump up and down throughout the race, which requires the joints to be stronger and more durable, so that the vehicle can win out in a variety of special and harsh environments.     There are basically two kinds of ball joints that can be used in an off-road racing vehicle: 1) Injection molded. 2) Stamped.                   An...

What is a Heim Joint

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     A  rod end bearing , also known as a  heim joint  (N. America) or  rose joint  (U.K. and elsewhere), is a mechanical articulating  joint . Such joints are used on the ends of control rods,  steering links ,  tie rods , or anywhere a precision articulating joint is required, and where a  clevis end  (which requires perfect 90 degree alignment between the attached shaft and the second component) is unsuitable. A ball  swivel  with an opening through which a bolt or other attaching hardware may pass is pressed into a circular casing with a threaded shaft attached. The threaded portion may be either male or female. The heim joint’s advantage is that the ball insert permits the rod or bolt passing through it to be misaligned to a limited degree (an angle other than 90 degrees). A link terminated in two heim joints permits misalignment of their attached shafts (viz., other than 180 degrees) when used in tension...