Page 49 - Shigley's Mechanical Engineering Design

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24 Mechanical Engineering Design
Table 1–1

Problem Numbers for Linked End-of-Chapter Problems*

3–1 4–50 4–74
3–40 5–65 5–66
3–68 4–23 4–29 4–35 5–39 6–37 7–7 11–14
3–69 4–24 4–30 4–36 5–40 6–38 7–8 11–15
3–70 4–25 4–31 4–37 5–41 6–39 7–9 11–16
3–71 4–26 4–32 4–38 5–42 6–40 7–10 11–17
3–72 4–27 4–33 4–39 5–43 6–41 7–11 7–19 7–20 7–34 11–27 11–28 13–38 14–36
3–73 4–28 4–34 4–40 5–44 6–42 7–12 7–21 7–22 7–35 11–29 11–30 13–39 14–37
3–74 5–45 6–43 7–13 11–41 13–42
3–76 5–46 6–44 7–14 11–42 13–42
3–77 5–47 6–45 7–15 11–18 13–40 14–38
3–79 5–48 6–46 7–16 11–19 13–41 14–39
3–80 4–41 4–71 5–49 6–47
3–81 5–50 6–48
3–82 5–51 6–49
3–83 5–52 6–50
3–84 4–43 4–73 5–53 5–56 6–51
3–85 5–54 6–52
3–86 5–55 6–53
3–87 5–56

*Each row corresponds to the same mechanical component repeated for a different design concept.

1–17 Power Transmission Case Study Specifications

A case study incorporating the many facets of the design process for a power transmis-
sion speed reducer will be considered throughout this textbook. The problem will be
introduced here with the definition and specification for the product to be designed.
Further details and component analysis will be presented in subsequent chapters.
Chapter 18 provides an overview of the entire process, focusing on the design sequence,
the interaction between the component designs, and other details pertinent to transmis-
sion of power. It also contains a complete case study of the power transmission speed
reducer introduced here.
Many industrial applications require machinery to be powered by engines or elec-
tric motors. The power source usually runs most efficiently at a narrow range of rota-
tional speed. When the application requires power to be delivered at a slower speed than
supplied by the motor, a speed reducer is introduced. The speed reducer should trans-
mit the power from the motor to the application with as little energy loss as practical,
while reducing the speed and consequently increasing the torque. For example, assume
that a company wishes to provide off-the-shelf speed reducers in various capacities and
speed ratios to sell to a wide variety of target applications. The marketing team has