US 12,168,493 B2
Locking arm of a carrier connecting rod and method for making the same
Chiu Kuei Wang, Taichung (TW)
Assigned to KING RACK INDUSTRIAL CO., LTD., Taichung (TW)
Filed by KING RACK INDUSTRIAL CO., LTD., Taichung (TW)
Filed on Sep. 14, 2023, as Appl. No. 18/368,530.
Claims priority of application No. 111137338 (TW), filed on Sep. 30, 2022.
Prior Publication US 2024/0124081 A1, Apr. 18, 2024
Int. Cl. B62H 3/12 (2006.01); B21D 37/10 (2006.01); B29C 45/14 (2006.01); B60R 9/10 (2006.01); E05B 71/00 (2006.01); F16B 45/02 (2006.01)
CPC B62H 3/12 (2013.01) [B21D 37/10 (2013.01); B29C 45/14336 (2013.01); B60R 9/10 (2013.01); E05B 71/00 (2013.01); F16B 45/02 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method for manufacturing a locking arm of a carrier connecting rod comprising the following steps:
step S1: preparing a strip of metal sheet;
step S2: placing the metal sheet in a first stamping die which presses the metal sheet to form a first half-finished product, the first half-finished product including a front section, a bent middle section, and a rear section, the front section having an aperture, the bent middle section having a positioning hole, and the rear section having a pivotal hole;
step S3: preparing a second stamping die, the second stamping die having a circular groove which is located corresponding to the bent middle section, placing the first half-finished product in the second stamping die and pressing the first half-finished product to form a second half-finished product, the bent middle section being pressed through the circular groove of the second stamping die to form two arc-shaped portions respectively protruding from an upper side and a lower side of the bent middle section, the bent middle section being formed to include a recessed area, the positioning hole being centered formed to the recessed area, an inner periphery of the positioning hole being formed to be a conical positioning hole, a surplus material generated corresponding to the aperture, the positioning hole, and the pivotal hole during the step S2 being deburred, and
step S4: placing the second half-finished product into a plastic mold, injecting plastic to cover the front section and the aperture to form an L-shaped stopper, resulting in the locking arm.