NOTE: Contemporary Operational Environment At various times during the class, the instructor will stress the importance of the topic by conveying personal experience related to the topic of discussion. The instructor will also answer any questions relating to the experience. a. The engine provides the torque to move the vehicle; see how the engine let’s torque is transferred to the drive wheels. We will do this by examining the propeller shaft. NOTE: Show Slide #3 b. Propeller Shaft: 1) Purpose: The power, having been transmitted through an angle by means of a universal joint, is next carried along the power train by a device known as a propeller shaft, or drive shaft. Propeller shaft is the most commonly used term, however either may be used. 2) Propeller shafts may be solid or tubular. A solid shaft is somewhat stronger than a hollow shaft of the same diameter, but a hollow shaft is much stronger than a solid shaft of the same weight. NOTE: Show Slide #4 c. Slip Joints: 1) Purpose: Because flexing of the suspension causes the axle housing to move forward and backward, and up and down, some provisions must be made to allow the propeller shaft to contract and expand. A device known as a slip joint provides the necessary telescopic action for the propeller shaft. 2) Construction: A slip joint consists of a male and female spline, a grease seal, and a lubrication fitting. The male spline is an integral part of the propeller shaft and the female portion is fixed to a universal joint directly behind the transmission or transfer case. As the axle housing moves backwards and forward, the slip joint gives freedom of movement in a horizontal direction and yet is capable of transmitting rotary motion. NOTE: Show Slide #5 d. Location: The propeller shaft connects the power flow from the transmission to the differentials with universal joints that permit the shaft to be installed at varying angles. NOTE: Show Slides #6 and 7 e. Purpose: 1) Transmit torque to the Axles: One function of the differential is to transmit engine torque to the drive axles. 2) Provide a gear reduction: Gear reduction is gained by the different sizes of gears used in the differential assembly, a smaller gear driving a larger gear.
NOTE: Contemporary Operational Environment At various times during the class, the instructor will stress the importance of the topic by conveying personal experience related to the topic of discussion. The instructor will also answer any questions relating to the experience. a. The engine provides the torque to move the vehicle; let’s see how the engine torque is transferred to the drive wheels. We will do this by examining the propeller shaft. NOTE: Show Slide #3 b. Propeller Shaft: 1) Purpose: The power, having been transmitted through an angle by means of a universal joint, is next carried along the power train by a device known as a propeller shaft, or drive shaft. Propeller shaft is the most commonly used term, however either may be used. 2) Propeller shafts may be solid or tubular. A solid shaft is somewhat stronger than a hollow shaft of the same diameter, but a hollow shaft is much stronger than a solid shaft of the same weight. NOTE: Show Slide #4 c. Slip Joints: 1) Purpose: Because flexing of the suspension causes the axle housing to move forward and backward, and up and down, some provisions must be made to allow the propeller shaft to contract and expand. A device known as a slip joint provides the necessary telescopic action for the propeller shaft. 2) Construction: A slip joint consists of a male and female spline, a grease seal, and a lubrication fitting. The male spline is an integral part of the propeller shaft and the female portion is fixed to a universal joint directly behind the transmission or transfer case. As the axle housing moves backwards and forward, the slip joint gives freedom of movement in a horizontal direction and yet is capable of transmitting rotary motion. NOTE: Show Slide #5 d. Location: The propeller shaft connects the power flow from the transmission to the differentials with universal joints that permit the shaft to be installed at varying angles. NOTE: Show Slides #6 and 7 e. Purpose: 1) Transmit torque to the Axles: One function of the differential is to transmit engine torque to the drive axles. 2) Provide a gear reduction: Gear reduction is gained by the different sizes of gears used in the differential assembly, a smaller gear driving a larger gear.
Power%20Trains%20(TSP).docx