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pawl    
n. 棘爪,制转杆
vt. 用制转杆使停转

棘爪,制转杆用制转杆使停转

pawl
n 1: a hinged catch that fits into a notch of a ratchet to move
a wheel forward or prevent it from moving backward [synonym:
{pawl}, {detent}, {click}, {dog}]

Pawl \Pawl\, v. t.
To stop with a pawl; to drop the pawls off.
[1913 Webster]

{To pawl the capstan}. See under {Capstan}.
[1913 Webster]


Pawl \Pawl\, n. [W. pawl a pole, a stake. Cf. {Pole} a stake.]
(Mach.)
A pivoted tongue, or sliding bolt, on one part of a machine,
adapted to fall into notches, or interdental spaces, on
another part, as a ratchet wheel, in such a manner as to
permit motion in one direction and prevent it in the reverse,
as in a windlass; a catch, click, or detent. See Illust. of
{Ratchet Wheel}. [Written also {paul}, or {pall}.]
[1913 Webster]

{Pawl bitt} (Naut.), a heavy timber, set abaft the windlass,
to receive the strain of the pawls.

{Pawl rim} or {Pawl ring} (Naut.), a stationary metallic ring
surrounding the base of a capstan, having notches for the
pawls to catch in.
[1913 Webster]


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  • How does this pawl mechanism work? - Engineering Stack Exchange
    From 507 mechanical movements, No 63, we get the following diagram and description Jumping or intermittent rotary motion, used for meters and revolution-counters The drop and attached pawl, carr
  • How can I calculate the bending and compression stress on my pawl?
    The pawl is going to have to withstand 6000 lb of weight that is going to be transferred by the pin The bottom of the pawl is going to be in contact with the tracks at an angle which is going to cause it to be in bending and compression
  • Friction versus ratcheting pawl - Engineering Stack Exchange
    The pawl is lightly spring actuated to maintain forced contact with the plunger surface at all times Does anyone have experience with friction pawls and in particular why these are not as commonly used as ratcheting pawls?
  • Ratchet and Pawl mechanism - Engineering Stack Exchange
    0 I have incorporated a ratchet and pawl mechanism in the assembly, where the lead screw is driven manually using a handle My concern is that when a load is applied, there is a possibility of sudden reverse motion or jerking due to the load To prevent back-driving and ensure load holding, I have added a ratchet and pawl mechanism
  • One way locking mechanism without springs or flexible members
    In order for a mechanical movement to be "one way", something has to change state as the elements in the mechanism move The expansion and contraction of a spring and the appearance or disappearance of a magnetic field constitute such a change of state I don't think what you are looking for exists , I would be amazed if there was a device that was "one way" without having any springs or
  • One way locking mechanism linear movement - Engineering Stack Exchange
    I have looked at a linear ratchet system (with teeth and paw or hole and pawl) which is the basic principle of completing this task But here lies the problem of the adjustability, it has to be adjustable in a maximum of 1cm (0 4 inch) increments
  • mechanical engineering - vertical rack and pinion self-stopping . . .
    I thought it was a rack and pinion solution, but since the mechanism is hidden, I didn't know which one it is If we imagine 2 perpendicular axes, the table moves up-down (z-axis) and the knob spins on the horizontal x-axis I think it's a combination of lead screw and rack and pinion, because I've found one animation where there's a worm gear (basically a screw) which turns a pinion which
  • machine design - How would I calculate the bending stress on a . . .
    The structure is a a linear and ratchet pawl and this is the free body diagram of pawl that is under bending and compression and I am just trying to figure out the bending stress caused by the moment arm
  • What is name of clutch system in a roller shade?
    It is a spring-loaded ratchet and pawl system the pawl mechanism is unlocked by the centripetal force of the initial rolling of the shade by a user Here is a diagram
  • Drum-brake self-adjusters - Engineering Stack Exchange
    I was reading about Automotive Brakes (Chapter 52, Automotive Mechanics by William H Crouse, Donald L Anglin, 10th edition) And in a section about drum-brake self-adjusters, it is said that the





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