hand lever

简明释义

手杆

英英释义

例句

1.He quickly grabbed the hand lever to stop the machine from working.

他迅速抓住手动杠杆以停止机器运转。

2.The hand lever on the exercise machine allows you to adjust the resistance.

健身器械上的手动杠杆可以让你调整阻力。

3.The mechanic used the hand lever to lift the car for repairs.

机械师使用手动杠杆将汽车抬起以进行维修。

4.Using the hand lever, she was able to control the flow of water.

通过使用手动杠杆，她能够控制水流。

5.To open the gate, simply pull the hand lever down.

要打开大门，只需向下拉手动杠杆。

作文

In the world of machinery and engineering, the term hand lever refers to a simple yet effective mechanical device that allows users to exert force or control over a particular function. A hand lever is typically a rigid bar or arm that pivots around a fixed point, known as the fulcrum. This design enables the user to amplify their input force, making it easier to perform tasks that would otherwise require significant effort. The versatility of the hand lever makes it an essential component in various applications, from everyday tools to complex machinery.One of the most common examples of a hand lever is found in the design of a pair of scissors. When the user squeezes the handles of the scissors, they are effectively using a hand lever to bring the blades together with greater force than what their fingers alone could achieve. This principle of leverage is crucial not only in scissors but also in many other tools, such as pliers, crowbars, and even the gearshift in a car.The mechanics behind a hand lever can be explained through the concept of mechanical advantage. By changing the distance from the fulcrum to the point where the force is applied, users can either increase or decrease the amount of force needed to accomplish a task. For instance, when using a long hand lever, less effort is required to lift a heavy object compared to a shorter lever. This is why levers are so widely used in various fields, including construction, automotive repair, and even in sports equipment.In addition to its practical applications, the hand lever also plays a significant role in ergonomics. Tools designed with hand levers often allow for more comfortable use, reducing strain on the user's hands and wrists. This ergonomic consideration is particularly important in professional settings where workers may be using these tools for extended periods. By incorporating hand levers into tool designs, manufacturers can help prevent injuries and improve overall efficiency.Furthermore, the hand lever has also found its way into various forms of entertainment and sports. For example, in the game of tug-of-war, teams often employ strategies that involve leveraging their body weight against the opposing team's strength. Here, the concept of the hand lever is metaphorically applied, as participants use their physical positioning and grip to gain an advantage. Similarly, in sports like baseball and golf, athletes utilize hand levers in the form of bats and clubs to maximize their performance and control.In conclusion, the hand lever is a fundamental mechanical device that significantly enhances our ability to perform various tasks with ease and efficiency. Its applications span across multiple domains, from everyday tools to specialized machinery, and its principles are rooted in the basic laws of physics. Understanding the mechanics and advantages of the hand lever not only helps us appreciate its role in our daily lives but also inspires innovation in tool design and ergonomics. As we continue to explore and develop new technologies, the hand lever will undoubtedly remain a key element in shaping the future of mechanical engineering and design.

在机械和工程的世界中，术语手动杠杆指的是一种简单而有效的机械装置，使用户能够对特定功能施加力量或控制。手动杠杆通常是一个刚性杆或臂，围绕一个固定点（称为支点）旋转。这种设计使得用户能够放大他们的输入力量，从而更容易执行那些否则需要大量努力的任务。手动杠杆的多功能性使其成为各种应用中的基本组成部分，从日常工具到复杂的机械。一个最常见的手动杠杆例子可以在剪刀的设计中找到。当用户挤压剪刀的手柄时，他们实际上是在使用手动杠杆将刀片以比单靠手指施加的力量更大的力量合拢。杠杆原理在剪刀以及许多其他工具（如钳子、撬棍甚至汽车的换挡杆）中至关重要。手动杠杆背后的机制可以通过机械优势的概念来解释。通过改变从支点到施加力量的点的距离，用户可以增加或减少完成任务所需的力量。例如，当使用长的手动杠杆时，举起重物所需的努力比使用短杠杆要少。这就是为什么杠杆在建筑、汽车维修甚至体育设备等多个领域被广泛使用。除了实用应用外，手动杠杆在人体工程学中也发挥着重要作用。设计有手动杠杆的工具通常允许更舒适的使用，减少对用户手和手腕的压力。这种人体工程学的考虑在专业环境中尤为重要，因为工人可能会长时间使用这些工具。通过将手动杠杆纳入工具设计，制造商可以帮助防止伤害并提高整体效率。此外，手动杠杆还出现在各种娱乐和体育形式中。例如，在拔河比赛中，团队通常采用利用身体重量对抗对方力量的策略。在这里，手动杠杆的概念被比喻性地应用，因为参与者利用自己的身体位置和握力来获得优势。同样，在棒球和高尔夫等运动中，运动员利用手动杠杆作为球棒和球杆来最大化他们的表现和控制。总之，手动杠杆是一种基本的机械装置，显著增强了我们轻松高效地执行各种任务的能力。它的应用跨越多个领域，从日常工具到专业机械，其原理根植于物理学的基本法则。理解手动杠杆的机制和优势不仅有助于我们欣赏其在日常生活中的作用，还激发了工具设计和人体工程学的创新。随着我们继续探索和开发新技术，手动杠杆无疑将继续成为塑造机械工程和设计未来的关键元素。