File:Direct pawl clicker torque concept.png
Original file (2,154 × 610 pixels, file size: 202 KB, MIME type: image/png)
Captions
Summary[edit]
DescriptionDirect pawl clicker torque concept.png |
English: A basic view of the workings of a clicker type torque wrench. This particular type is probably the simplest, it uses a cubic pawl as the detente directly in contact with the drive head and spring cam. Français : Principe de fonctionnement d'une clé dynamométrique à réarmement automatique. Le mécanisme consiste à appliquer une force sur le carré par le biais du ressort de réglage. Une fois le couple atteint, le carré bascule laissant le bras de levier relié à la tête heurter la paroi du tube principal, l'utilisateur entend un "clac" et ressent un a-coup dans sa main. |
Date | |
Source | Own work |
Author | Lead holder |
Licensing[edit]
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Annotations InfoField | This image is annotated: View the annotations at Commons |
Torque wrench head.
Many varieties, can be ratcheted, can have removable socket, spanner or wrench ends.
In the direct pawl type this extends deeply into the barrel and makes contact with the (in this case) cubic pawl.
Pawl
Can be many different shapes and sizes depending on manufacturer. A simple cube shaped one is used here. It is firmly fixed between head and cam under no load and below torque situations.
Cam
Evenly applies spring pressure to the pawl and head.
Spring
Applies (adjustable in some cases) force to the cam, pawl and head. This force is what resists the wrench clicking until the torque desired is reached.
Grip and adjustment parts
Not modelled in any detail. These parts vary widely with manufacturer and purpose of the wrench. Generally a screw pushes against a spring cylinder and serves to increase or decrease spring force depending on how much the grip is turned.
When desired torque has not been reached (or the wrench is in storage or at rest.
The spring force pushing against the cam and pawl is adequate to overcome the desire of the interior end of the head to tilt outwards and upset the pawl's orientation.
The desired torque has been reached.
Once the torque at the head is enough to overcome the spring force which is keeping the pawl in position, the pawl tilts and pushes the cam back towards the grip (in turn compressing the spring), as the internal end of the head tilts outwards and hits the body tube. This causes the audible click and noticeable tactile feedback which is characteristic of this type of wrench.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 19:17, 21 October 2016 | 2,154 × 610 (202 KB) | Lead holder (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
- Usage on fr.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Horizontal resolution | 37.79 dpc |
---|---|
Vertical resolution | 37.79 dpc |