A sketch of an adjustable-height platform used to load and unload freight trucks is shown below. How many primary joints are there in this mechanism?
A sketch of an adjustable-height platform used to load and unload freight trucks is shown below. How many primary joints are there in this mechanism?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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
Transcribed Image Text:**Question 2**
A sketch of an adjustable-height platform used to load and unload freight trucks is shown below.
**How many primary joints are there in this mechanism?**
---
**Diagram Description:**
The image shows a side view of a mechanical loading platform system. It consists of a scissor lift mechanism, which is used to elevate and lower a platform for loading freight trucks.
- **Platform:** The top flat surface, inclined upwards on the right side, is used for loading and unloading.
- **Mechanism:** The scissor lift mechanism includes several components:
- **Two Pairs of Crossed Members:** These are the main arms that form an "X" shape. They pivot in the middle and are connected by bolts, allowing movement.
- **Hydraulic Cylinder:** Positioned diagonally across the lower section, this may assist in lifting the platform.
- **Fixed Pivot Points:** Located at the bottom ends where the crossed members attach to the base on the left and right sides.
- **Load Illustration:** A section on the right shows stacked boxes on a surface level with the platform, indicating where the load is supposed to be placed or removed.
The scissor lift mechanism visually includes several primary joints at points where members intersect or connect with the hydraulic cylinder and fixed points.
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