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Anonymous users2024-02-13Motion analysis. Action Missions.
1) Speed up the center of gravity and increase the frequency of sliding.
2) Increase the power of the ice push to produce more forward thrust.
3) Maintain the balance of the movement and the smoothness of the straight line. Types of swing arms.
Swing arm action. Divided into single swing arm, double swing arm and backhand glide (no swing arm). Generally, the single swingarm is mostly used for medium and long distances and curves to keep the cadence and speed even; The double swingarm is mostly used for starts, short distances, and finish sprints to increase speed; Backhand sliding is mainly used in the middle of the straight after the long distance events, to take advantage of the higher speed gained in the corner.
Swing arm method and action specification requirements.
1) Swing arm method: There are three points in the swing of the two arms, namely the front high point of the right (left) arm, the droop point of the two arms, and the back high point of the right (left) arm (Figure 1-15). When swinging forward, the arm falls from the back high point and accelerates forward and upward swing to the front high point through the droop point, and then, swings back from the front high point and falls through the droop point, and then accelerates to the rear swing to the back high point.
2) Action specification requirements.
The swing arm should be ahead of the leg movement, and when the leg movement is moving at high speed, the arm and leg move in sync.
The two arms swing back and forth independently with the shoulder as the axis.
When swinging forward to the highest point, the hand does not exceed shoulder height, and the elbow bend angle can be less than 45° for short distances and 150° for long distances of 150° 170°.
When swinging back to the back high, keep the short elbow bent and the elbow roughly level with the shoulder; The long-distance arms can be extended and the fingers can be slightly above the head.
Action points. 1) The swing of the arm should be based on the shoulder. Do not swing the arm to affect the stability of the shoulders and upper body, so as not to cause shoulder tension and redundant movements.
2) Do a front and back swing arm close to your thighs.
3) Bend your fingers slightly or half-clenched into a fist and relax your wrists. If there is tension in the hands and wrists, it will be transmitted to the arms and shoulders, which will affect the coherence and speed of the movements.
4) The swing direction, strength, amplitude and speed of the arms should be in harmony with the leg movements, and the swing of the arms can be slightly ahead of the leg movements before getting a high-speed run to speed up the rhythm of the leg movements.
5) When the distance is short, the elbow can be flexed to swing; Swing your arms straight when swinging backwards in the middle to long distances, and glide with a single swing arm or backhand on different sections.
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Anonymous users2024-02-12When the tower crane swings the arm, what is the empty of the swing arm is broken, and the arm lock shields you try to see if you can lock it? Just lock it up.
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Anonymous users2024-02-11Hello, kissing, very suspicious, Suixing can answer this question for you. Can the tower crane lock the boom after work: the tower crane boom is strictly not allowed to be locked, because the tower crane is heavy in the no-load state, that is, the balance arm is heavier, so the tower crane boom will be properly lifted, which is a very good attitude.
When the wind blows, the tower crane boom swings with the wind, and eventually swings to the direction of the balance arm to the wind. In this way, the wind can appropriately reduce the bending moment formed by the different weights of the two arms of the tower crane, which is of great benefit to prevent the tower crane from overturning. If the hungry Sun arm is locked, the tower crane can not rotate, it can not maintain the shape of the tail blowing, if the wind is strong, the tower crane will be in danger of capsizing.
Especially if you get the gear stuck, it is possible to squeeze the gear of the tower crane off. Extended information: 1. The most important thing in the basic operation of the tower crane is the start and stop arm of the tower crane, acceleration and deceleration should be uniform, and the hook generally slows down and stops when swinging in the direction of the cab when the arm turns, and shifts to accelerate when swinging in the opposite direction of the driver's license.
2. In the operation of the tower crane, the main thing is to accelerate gear-by-gear, decelerate gear-by-gear, and do not overstep the operation! The interval between each gear is 2 to 3 seconds; Secondly, we must learn to follow the car, just like we use the wire pendant, use the inertia, and you will understand. When the hook is thrown forward, it is to follow forward, but the length of the distance to be mastered.
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Anonymous users2024-02-10No, you don't.
As a tower crane, don't you know the most basic operating procedures? How did you get your tower crane certificate? Did you buy it with money? Have you ever attended a study?
Follow the operating procedures to lock the boom strictly after work.
So there is no need for a lock.
You're not afraid of an accident and try to lock it, and I'm really speechless to you.
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Anonymous users2024-02-091.Get the bearing.
Generally, when the boom rotates the arm, the hook should slow down to stop when swinging in the direction of the cab, and change gears to accelerate when swinging in the opposite direction of the cab rotating arm.
Method steps.
2.Pay attention to the speed.
The acceleration and deceleration of the boom should be uniform when starting and stopping the arm, and it is best to accelerate and decelerate gear-by-gear, and never over-gear operation.
Method steps.
3.Take advantage of inertia.
When the hook is thrown forward, it is towards the forward heel, and it is necessary to master the length of the distance, which requires proficiency in the running speed of the trolley.
Method steps.
4.Skill comes from practice.
When the arm suddenly stops, you may feel that the arm of the bucket is still swinging in the direction of the stuffy group, in this case, you can vacate the gear, and then return the arm to the opposite direction of a first gear, and then vacate it.
Method steps.
5.Basic knowledge of machinery.
If you want to drive a good car, you must mainly master some basic common sense, if you don't even know the basic common sense, you may not even be able to guarantee your own safety.
Method steps.
6.Observe the weather.
If the weather is bad and the wind may be a little strong, it is very difficult to stop the boom, and it is necessary to have skilled technology, of course, if it is in the case of strong winds, the tower crane is not allowed to work.
Method steps.
7.Adjust according to the hook.
If it is unstable, it may be caused by the hook swaying from side to side, at this time, the big arm can be adjusted according to the direction of the hook's swaying, and the heel can be stabilized.
Swinging the arms balances the kinetic energy of the legs, providing stability to the runner. >>>More
Walking is not just a leg exercise, but a full-body exercise, and it is important to balance your body and adjust your pace by swinging your arms. Control the rhythm, the best walking speed is to walk without panting, the pulse should not exceed 120 minutes, the back and shoulders are heavy, breathe deeply with the abdomen, touch the ground with the whole ball of the foot, displacement from the heel to the toe, and walk according to your own walking rhythm at all times, do not be fast and slow, stop when running, and try to maintain a uniform speed. At the beginning of the hike can slow down a little, so that each part of the body is warmed up first, there is a process of adaptation, 5-10 minutes before speeding up the pace, walking from the perspective of safety, team members should maintain a reasonable distance between each other, generally 2-3 meters, in the walking, to develop a good habit, concentrate on walking, do not laugh while walking, play and play, but also can not sing loudly, which not only distracts the attention of other team members, but also consumes their physical energy meaninglessly. >>>More
Are you talking about the big Dongfeng Duolika or the small Dongfeng Duolika, now if the small 4 square Dongfeng Duolika garbage truck is more than 80,000, it generally depends on which factory you want, and the general large factory and small factory ** are also more than 10,000 differences.
Change the direction of the force, and the magnitude of the force remains the same.
The two are the relationship of containing and being included. The range of arms is relatively wide, referring to the hands and arms, and the range is relatively wide. The arm does not include the hand, and the range is relatively small. In general, the arm contains the arm, and the arm is included.