Movatterモバイル変換

[0]ホーム

Jump to content

Dog clutch

Edit links

From Wikipedia, the free encyclopedia

Type of clutch

Not to be confused withDog-leg gearbox.

Dog clutch used to drive the rotating platter in amicrowave oven.

Dog clutch (disengaged) on the countershaft gears of theHonda CBR600RR transmission.

Adog clutch (also known as adog box,dog gears,dog ring,clutch dog, orpositive clutch) is a type ofclutch that couples two rotatingshafts or other rotating components by engagement of interlocking teeth ordogs rather than byfriction. The two parts of the clutch are designed such that one will push the other, causing both to rotate at the same speed and will never slip. In engineering, a "dog" is a tool or device used to lock two components in relation to each other.

Dog clutches are used where slip is undesirable and/or the clutch is not used to controltorque. Without slippage, dog clutches are not affected by wear in the same way that friction clutches are, but result inshock when shafts of different speeds are engaged. For this reason they are best used when sudden starting action is acceptable and the inertia of the system is small.^[1]

Dog clutches are used inside constant-meshmanual transmissions to lock different gears to the rotating input and output shafts. Asynchromesh arrangement ensures smooth engagement by matching the shaft speeds before the dog clutch is allowed to engage.^[2]Racecar,motorcycle, and largetruck transmissions, having higher performance demands and less need for smooth engagement than passenger cars, commonly employ dog clutches alone (without the use of synchronizers) to engage gears due to their high strength and durability and low complexity and weight.^[3] These unsynchronized gearboxes, also referred to as a dog boxes, allow clutchless shifting.^[4]

Oftentimes boats with inboard engines, such as sailboats, will use a dog clutch to engage the drive shaft to the transmission. Shifting from neutral to forward or reverse often results in a large "clunk" noise that can be heard by occupants as the clutch engages suddenly.

Another example of a dog clutch is in theSturmey-Archer bicyclehub gear, where a sliding cross-shaped clutch locks the driver assembly to different parts of theplanetary geartrain.^[5]

References

[edit]

Wikimedia Commons has media related toDog clutches.

^Oberg, Erik; Franklin D., Jones; Horton, Holbrook L.; Ryffel, Henry H. (2012). McCauley, Christopher J. (ed.).Machinery's Handbook(PDF) (29th ed.). New York: Industrial Press. pp. 2451–2452.ISBN 978-1-61344-859-5.OCLC 802251511. Archived fromthe original(PDF) on 2020-11-19.
^Automotive Transmissions: Fundamentals, Selection, Design and Application. Harald Naunheimer, Bernd Bertsche, Joachim Ryborz, Wolfgang Novak, in collaboration with Peter Fietkau (2nd ed.). Berlin: Springer. 2011. pp. 300–301, 317, 535.ISBN 978-3-642-16213-8.OCLC 695386840.{{cite book}}: CS1 maint: others (link)
^Hackl, Thomas (2009)."Potentials and development methodology for transmissions with dog clutches"(PDF).Hofer Powertrain GmbH. Archived fromthe original(PDF) on 2016-08-02.
^Smith, Carroll (1978).Tune to Win. Fallbrook, CA: Aero Publishers. p. 148.ISBN 0-87938-071-3.OCLC 5324491.
^Sutherland, Howard."Sutherland Handbook of Coaster Brakes and Internally Geared Hubs"(PDF).www.sheldonbrown.com. Sutherland Pubns.Archived(PDF) from the original on 2020-09-14. Retrieved21 July 2015.

This article about an automotive part or component is astub. You can help Wikipedia byexpanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Dog_clutch&oldid=1277234481"

Categories:

Hidden categories:

[8]ページ先頭