Ratchet mechanism spring
A spring component for a ratcheting mechanism, such as a ratchet wrench. The spring component is shaped to be retained in a recess without any special machining. For example, the spring component can be retained at three abutment points. A leaf of the spring component can abut a pawl, and a base portion opposite the leaf can abut the drive gear. Support arms can abut the sidewall of the recess to retain the spring component within the recess without the need for special machining or tooling.
1. A ratchet mechanism comprising:
a drive gear;
a pawl adapted to engage the drive gear when the drive gear is rotated in a drive direction, and slip against the drive gear when the drive gear is rotated in a ratcheting direction opposite the drive direction;
a recess with a wall; and
a spring component disposed in the recess and including:
a base portion extending in a first plane;
a leaf extending from the base portion and adapted to abut and bias the pawl into engagement with the drive gear; and
a support arm extending from the base portion to an arcuate edge, and having a length and width that extend in a second plane substantially perpendicular to the first plane, wherein the arcuate edge abuts the wall with a rocking movement during use of the spring component.
2. The ratchet mechanism of claim 1 , wherein the leaf extends at an angle relative to the base portion.
3. The ratchet mechanism of claim 2 , wherein the angle is a first angle when the pawl engages the drive gear, and the angle is a second angle when the pawl slips against the drive gear to allow rotation of the drive gear in the ratcheting direction, wherein the first angle is greater than the second angle.
4. The ratchet mechanism of claim 1 , wherein the base portion has a base width and the leaf has a leaf width, wherein the base width is larger than the leaf width.
5. The ratchet mechanism of claim 1 , further comprising a gap disposed between the leaf and the support arm.
6. A ratcheting tool comprising:
a drive gear;
a pawl adapted to engage the drive gear when the drive gear is rotated in a drive direction, and slip against the drive gear when the drive gear is rotated in a ratcheting direction opposite the drive direction;
a head having a recess with a wall; and
a spring component disposed in the recess and including:
a base portion extending in a first plane and having a base width;
a leaf extending from and at an angle relative to the base portion, and adapted to abut and bias the pawl into engagement with the drive gear, wherein the angle is a first angle when the pawl engages the drive gear, and the angle is a second angle when the pawl slips against the drive gear to allow rotation of the drive gear in the ratcheting direction, wherein the first angle is greater than the second angle, and the leaf has a leaf width smaller than the base width;
a support arm extending from the base portion to an arcuate edge, and having a length and width that extend in a second plane substantially perpendicular to the first plane, wherein the arcuate edge abuts the wall with a rocking movement during use of the spring component; and
a gap disposed between the leaf and the support arm.