What Is a Caterpillar Chain?
Tracks are driven by a driving wheel, and are a flexible link that surrounds the driving wheel, road wheel, induction wheel, and carrier wheel. Tracks consist of track shoes and track pins. A track pin connects each track shoe to form a track link. There are holes at both ends of the track shoe, which mesh with the driving wheels, and induce teeth in the middle, which are used to regulate the track and prevent the track from falling off when the tank is turned or tilted. To improve the rigidity of the track shoe and the adhesion of the track to the ground.
- [l dài]
- The track is driven by the driving wheel, around the driving wheel,
- Word: Track
- Pinyin: l daì
Unblocked tracks
- The reason why the tank can climb steep slopes, the wider it is, the deeper the water, the vertical walls, the swamps, the fields, and the galloping battlefield are unobstructed because it has two special tracks, which are often called the "infinite tracks of the tank" "Or the tank" bring your own way. "
Tracks first developed
- However, the first tanks developed by people used the tracks of agricultural crawler tractors. In 1915, the "Little Voyager" tank developed by Britain followed the tracks of the American "Brock" tractor. In 1916, the "Schnard" and "San Chamon" tanks developed by France used the tracks of the American "Holter" tractor. It has been nearly 90 years since the track entered the history of the tank. Today s track, regardless of its structural form, materials, and processing, has continuously enriched the tank s treasure trove. The track has developed into a tank infinite track that can withstand the test of war.
Track crawler classification
- Tank tracks can be divided into two categories: metal pin hinge type and metal rubber hinge type. Among them, metal rubber hinges can be divided into two types: single pin type and double pin type.
- The metal pin type track has a simple structure, direct dry friction between the pin and the pin hole, fast wear, and short life. When the tank is maintained, it is often found that the track pin is ground into a "sugar" shape. Track pins are also one of the wearing parts.
- The metal rubber hinged track is vulcanized with multiple rubber collars on the metal pin and press-fits in the track pin holes.In this way, there is no direct friction between the track pins and the track pin holes, and only the rubber collar generates elastic twist when twisted. Low noise, long life, of course, the structure is more complicated, and the cost is higher. The double pin metal rubber track uses the end connector to connect the two pins of the two track pads. The force is good, the disassembly is more convenient, but the structure is more complicated. It is the mainstream track form on the main battle tank.
Track Active
- The driving wheel is a driving part, which is composed of a wheel hub, a ring gear, a toothed washer, a bevel gear cup, a fixed nut and a stop bolt. It meshes with gears and tracks to transmit the power from the side reducer to the tracks to make the tank move.
- The induction wheel is a driven wheel that is used to induce and support the track and adjust the tightness of the track together with the track adjuster. It consists of a hub, a wheel disc, a ball bearing, an axle cover, a fixed nut, a double-row ball bearing, a support cup and a wrap-around oil cap.
- The pulley is mainly used to support the upper track. Without such a pulley, the track will collide. One end of the supporting wheel axle is firmly fixed on the vehicle body. Because the diameter of the pulley is smaller than that of the road wheel, the bearing's rotation speed is much higher. However, it only supports the upper track, that is, 1/3 of the weight of the track, to reduce the oscillation of the track.
- The track adjuster is used to adjust the tightness of the track. It consists of a bracket, a crank arm, a shaft sleeve, a worm gear, a worm, a screw, a capstan and a bushing. The tension of the track has a great impact on the tank's travel and track life. The track is too tight or too loose. Different use environments require different tightness of the track. If driving on a hard road, the track should be tightened; when driving in a desert area, the track should be loosened. In addition, as the track pin and pin ear hole wear increase, the track will become loose. In order to maintain the proper tension of the track, a track adjuster is needed to adjust the tension of the track. This is to change the tension of the track by means of the track adjuster to change the distance of the induction wheel relative to the driving wheel. The track adjuster swings the induction wheel backward to a certain position, and the induction wheel moves away from the driving wheel, so the track is tightened; the track adjuster swings the induction wheel forward to a certain position, and the track becomes loose.
Track composition
- Road wheels are used to support the weight of the tank and to regulate the tracks. It consists of wheels, wheels, tape,
- When the power of the engine is transmitted to the driving wheel, the driving wheel toggles the track in a clockwise direction, so an interaction force is generated between the grounded track and the ground. According to the principle of force and reaction, the track gives a force to the ground in the horizontal direction, and the ground gives a reaction to the track. This reaction force makes the tank move, which is called the tractive force of the tank.
Track structure material
- The special track material and structure have two major characteristics. The fiber is made of DuPont Kevlar fiber instead of the steel wire used for ordinary tracks. Kevlar fiber has the advantages of high strength, light weight, high modulus, no shrinkage, etc. This material is used as the skeleton for tires used in several famous cars in the world. The internal reinforcement of the track adopts the world recognized space material carbon fiber skeleton instead of the traditional cast steel skeleton. The strength of Kevlar fiber is 3 times that of steel wire compared with steel wire of the same specification, and the carbon fiber skeleton is 4 times stronger than that of cast steel. The phenomenon of stripping, tooth loss and broken teeth in the traditional track will not occur on special tracks at all.
- 4.Advantages of using special crawlers
- A. The special track is light, so after using the special track, the power transmission power of the equipment can be greatly improved.
- B. The various characteristics of the special track can make the equipment easily meet the design requirements.
- C. The service life of special tracks is more than doubled compared with traditional tracks, which saves equipment maintenance costs and improves work efficiency.
- 5.Price of special track
- Because of the high cost of the material, the price of special tracks is about 30% higher than that of traditional tracks. Therefore, customers can choose different designs and different materials of crawler according to their own design requirements.
Restricted track conditions
- From this point of view, the tank's ability to move is mainly limited by two conditions; one is the dynamic condition, and the other is the ground condition. The power condition refers to the power that the engine must provide to the tank to pass through the ground. Without this power, the driving wheel cannot turn. The ground condition refers to the force transmitted to the track by the active wheel, which must be provided by the ground with a reaction force (even the tractive force of tank movement). When the traction and driving resistance are equal, the tank moves at a constant speed; when the traction is greater than the driving resistance, the tank accelerates; when the traction is less than the driving resistance, the tank decelerates.
Tracked Track Features
- Light weight, high strength, can produce flame retardant, anti-explosion, anti-static, high temperature resistance, acid and alkali resistance according to customer requirements to meet various special requirements.
Tracked chassis
- Rubber shoes
- Rubber rubber track chassis are mostly suitable for small light industry and small construction machinery industry. Light industry is generally agricultural machinery within one to four tons. The construction machinery industry is mostly used in the small drilling industry.
- The choice of its operating environment is roughly as follows:
- (1) The operating temperature of rubber crawlers is generally between -25 and + 55'C.
- (2) The salinity of chemicals, oil, and seawater will accelerate the aging of the crawler track. After use in such an environment, clean the crawler track.
- (3) The road surface with sharp protrusions (such as steel bars, stones, etc.) will cause injuries to the rubber tracks.
- (4) The edges of the road, ruts or uneven roads will cause cracks on the ground side of the track edges. Such cracks can continue to be used when they do not damage the steel cord.
- (5) Gravel and gravel roads will cause early wear of the rubber surface in contact with the load-bearing wheels, forming small cracks. In severe cases, moisture intrudes, causing the core iron to fall off and the wire to break.
- Steel track
- The use of steel tracks is relatively wide, its life span and the choice of working conditions are wider. It consists of steel tracks, track wheels, guide wheels, track wheels, chassis, and two walking reducers (the walking reducer consists of a motor, a gear box, a brake, and a valve body). Generally, for example, the drilling rig is arranged on the chassis as a whole, and the walking speed of the crawler chassis is adjusted by the control handle, which can make the whole machine move, turn, climb, and walk conveniently. [2]