Disk drive having an actuator arm assembly that includes stamped actuator arms
View Patent ↗A disk drive includes a disk and a head stack assembly. The head stack assembly includes an actuator arm assembly that includes first and second stamped actuator arms. The first stamped actuator arm may include a first arm portion, a first body portion and a coil-supporting portion for supporting a coil of a VCM. The first body portion defines a first contact surface. The second stamped actuator arm may include a second arm portion and a second body portion, the second body portion defining a second contact surface. According to one embodiment, the first and second stamped actuator arms may be attached to one another such that the first contact surface faces and contacts the second contact surface.
1. An actuator arm assembly for a disk drive, comprising:
a first stamped actuator arm, the first stamped actuator arm including a first arm portion, a first body portion and a coil-supporting portion for supporting a coil of a voice coil motor, the first body portion defining a first through bore and a first contact surface;
a second stamped actuator arm, the second stamped actuator arm including a second arm portion and a second body portion, the second body portion defining a second through bore and a second contact surface, wherein the first and second stamped actuator arms are configured to be bent and attached to one another such that the first contact surface faces and contacts the second contact surface, and
a collar fitted within the first and second through bores.
2. The actuator arm assembly of claim 1 , wherein the first actuator arm is unconnected to the second actuator arm when the arm assembly is stamped from the flat sheet of material.
3. The actuator arm assembly of claim 1 , wherein only the first actuator arm includes a coil-supporting portion.
4. The actuator arm assembly of claim 1 , wherein the second body portion is separate and distinct from the first body portion.
5. The actuator arm assembly of claim 1 , wherein the first and second contact surfaces are welded together.
6. The actuator arm assembly of claim 1 , further including a layer of adhesive between the first and second contact surfaces.
7. The actuator arm assembly of claim 1 , wherein the collar is fitted within the first and second through bores by a press fitting or swaging process.
8. A head stack assembly for a disk drive, the head stack assembly comprising:
an actuator arm assembly, the actuator assembly including:
a first stamped actuator arm, the first stamped actuator arm including a first arm portion, a first body portion and a coil-supporting portion for supporting a coil of a voice coil motor, the first body portion defining a first through bore and a first contact surface;
a second stamped actuator arm, the second stamped actuator arm including a second arm portion and a second body portion, the second body portion defining a second through bore and a second contact surface, wherein the first and second stamped actuator arms are configured to be bent and attached to one another such that the first contact surface faces and contacts the second contact surface;
a collar fitted within the first and second through bores, and
a first head gimbal assembly coupled to the actuator arm assembly.
9. The head stack assembly of claim 8 , further including a second head gimbal assembly coupled to the second actuator arm portion.
10. The head stack assembly of claim 8 , wherein the first actuator arm is unconnected to the second actuator arm when the arm assembly is stamped from the flat sheet of material.
11. The head stack assembly of claim 8 , wherein only the first actuator arm includes a coil-supporting portion.
12. The head stack assembly of claim 8 , wherein the second body portion is separate and distinct from the first body portion.
13. The head stack assembly of claim 8 , wherein the first and second contact surfaces are welded together.
14. The head stack assembly of claim 8 , further including a layer of adhesive between the first and second contact surfaces.
15. The head stack assembly of claim 8 , wherein the collar is fitted within the first and second through bores by a press fitting or swaging process.
16. A disk drive, comprising:
a disk;
a head stack assembly for reading and writing to the disk, the head stack assembly comprising:
an actuator arm assembly, the actuator assembly including:
a first stamped actuator arm, the first stamped actuator arm including a first arm portion, a first body portion and a coil-supporting portion for supporting a coil of a voice coil motor, the first body portion defining a first through bore and a first contact surface;
a second stamped actuator arm, the second stamped actuator arm including a second arm portion and a second body portion, the second body portion defining a second through bore and a second contact surface, wherein the first and second stamped actuator arms are configured to be bent and attached to one another such that the first contact surface faces and contacts the second contact surface;
a collar fitted within the first and second through bores, and
a first head gimbal assembly coupled to the actuator arm assembly.
17. The disk drive of claim 16 , further including a second head gimbal assembly coupled to the second actuator arm portion.
18. The disk drive of claim 16 , wherein the first actuator arm is unconnected to the second actuator arm when the arm assembly is stamped from the flat sheet of material.
19. The disk drive of claim 16 , wherein only the first actuator arm includes a coil-supporting portion.
20. The disk drive of claim 16 , wherein the second body portion is separate and distinct from the first body portion.
21. The disk drive of claim 16 , wherein the first and second contact surfaces are welded together.
22. The disk drive of claim 16 , further including a layer of adhesive between the first and second contact surfaces.
23. The disk drive of claim 16 , wherein the collar is fitted within the first and second through bores by a press fitting or swaging process.