{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# ch01 - Solutions to Chapter 1 Exercise Problems Problem 1.1...

This preview shows pages 1–9. Sign up to view the full content.

- 1 - Solutions to Chapter 1 Exercise Problems Problem 1.1 Find a mechanism as an isolated device or in a machine and make a realistic sketch of the mechanism. Then make a freehand sketch of the kinematic schematics for the mechanism chosen. Typical examples of solutions for this problem are given in the problem definitions of Chapter 3. Some examples are: 2 4 1 3 A D C B 1.88" 2.22" 201 ˚ 1.55" 1.64" 2 ω Bicycle suspension A B C D θ 2 3 4 2 3 ω Oscillating fan 2 ω A B C D 2 3 4 6 ˚ Door Y X Door closing linkage

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
- 2 - Problem 1.2 Cabinet hinges use various types of linkages for the folding mechanism. Identify three types of cabinet hinges and make a freehand sketch of the kinematic mechanism used. There are a large number of mechanisms that are used to obtain various types of hinge motions. Below are three of them. The first is a 6-bar Watt’s linkage used for chest lids. The hinge guides the chest lid such that no part of the lid crosses the plane of the back of the chest. The second example is a four bar linkage that guides the door from the open to closed position. The hinge is basically hidden when the door is closed. The third uses a 6-bar Watt’s linkage with a slider. The lid glides about the back corner of the box.
- 3 - Problem 1.3 The drawings shown below are pictorial representations of real mechanisms that are commonly encountered. Make a freehand sketch of the kinematic schematic representation of each mechanism. Water Pump Pin in a slot (pin attached to seat) Folding Chair Casement window mechanism 1 2 3 4 A B C

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
- 4 - Solution 1 2 3 4 A B C Water Pump 1 2 3 4 5 6 Casement window mechanism 1 2 3 Folding Chair
- 5 - Problem 1.4 Linkages are often used to guide devices such as computer keyboards in and out of cabinets. Find three such devices, and make a freehand sketch of the kinematic mechanisms used for the devices. Typewriter desk linkage Under drawer swing up mechanism Overhead bin hinge Problem 1.5 Fourbar linkages are used in common devices around the home and businesses. Locate six such devices and make a freehand sketch of each device and describe its function. Solution: Sample examples are given in the following:

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
- 6 - Brake for wheelchair. The mechanism exhibits a toggle motion Walking toy. The fourbar linkage moves the leg and wing. Door closer. The fourbar linkage is connected to a damper mechanism Kickback protector on table saw. The fourbar linkage is a parallelogram linkage.
- 7 - Tree trimmer. The fourbar linkage is a double lever mechanism used to increase the mechanical advantage Vicegrips. The fourbar linkage is a toggle mechanism

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
- 8 - Problem 1.6 Calculate the mobility, or number of degrees of freedom, of each of the mechanisms in Problem 1.3. 1 2 3 4 A B C n = 4 j = 4 M = 3(n j 1) + f i i = 1 j Mobility = 1 = 3(4 4 1) + 4 = 3 + 4 = 1 Water Pump 1 2 3 4 5 6 = 6 = 7 = 3(N L N J 1) + f i i = 1 j Mobility = 1 = 3(6 7 1) + 7 = 6 + 7 = 1 Casement window mechanism 1 2 3 Folding Chair n = 3 j = 3 = 3( ) + f i i = 1 Mobility = 1 = 3(3 3 1) + 4 = 1 f i = 2) Arbitrarily pick link 1 as the frame pin-in-slot joint ( n j
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern