Reaction device for forming equipment

• US 7,152,451 B1
• Filed: 05/25/2006
• Issued: 12/26/2006
• Est. Priority Date: 05/26/2006
• Status: Active Grant

• Current Assignee: Diebolt International, Inc.
• Original Assignee: Diebolt International, Inc.
• Inventors: Cotter, Jonathan P.
• Primary Examiner(s): Larson, Lowell A.
• Assistant Examiner(s): SULLIVAN, DEBRA M
• Application Number:
  US11/441,970
• Time in Patent Office: 215 Days
• Field of Search: 723/61, 724/050.6, 724/20, 724/050.7, 267/119
• US Class Current: 72/361
• CPC Class Codes: B21D 24/02 Die-cushions
• CPC Class Codes: F16F 9/0218 Mono-tubular units F16F9/0227, F16F9/0236, F16F9/0245 take precedence

Abstract

A reaction device for forming equipment includes a housing having a mount adapted to be connected to a forming die and a casing carried by the mount. A lift rod is disposed at least partially on the housing for movement relative to the house between extended and retracted positions. The lift rod has a first end disposed in the housing, a second end and a passage extending through the lift rod between its ends. An adapter is connected to the lift rod within the passage and is adapted to be coupled to a lift bar of the forming equipment. A biasing member is disposed between the lift rod and the housing to yieldably bias the lift rod to its extended position.

Claims

1. A reaction device for a forming die, comprising:

a housing including a mount adapted to be connected to a forming die and a casing carried by the mount;

a lift rod disposed at least partially in the housing for movement relative to the housing between extended and retracted positions, the lift rod having a first end disposed in the housing, a second end and a passage extending through the lift rod between the first end and the second end;

an adapter connected to the lift rod within the passage and adapted to be coupled to a lift bar of the forming die; and

a biasing member disposed between the lift rod and the housing that yieldably biases the lift rod to its extended position.

2. The reaction device of claim 1 wherein the adapter is threadedly connected to the lift rod.

3. The reaction device of claim 1 which also includes a connector disposed in the passage and engaged with both the lift rod and the adapter to retain the adapter on the lift rod.

4. The reaction device of claim 3 wherein the lift rod includes a shoulder extending into the passage, and wherein the connector engages the shoulder and the shoulder is disposed between the portion of the connector that engages the shoulder and the adapter.

5. The reaction device of claim 4 wherein the connector includes a head and a threaded portion extending from the head, and the head engages the shoulder and the threaded portion is threadedly connected to the adapter.

6. The reaction device of claim 5 wherein the head defines a seat that is engaged by the biasing member.

7. The reaction device of claim 1 wherein the adapter includes a shank that extends into the passage and is connected to the lift rod.

8. The reaction device of claim 1 wherein the biasing member is a gas spring having a casing that defines a first end of the gas spring and a piston rod extending out of the casing and defining a second end of the gas spring, one end of the gas spring being associated with the lift rod for movement therewith.

9. The reaction device of claim 1 which also includes a stop carried by at least one of the lift rod, the mount or the housing and adapted to limit movement of the lift rod relative to the housing.

10. The reaction device of claim 9 wherein the stop is formed of a resilient material to dampen the impact loads thereon.

11. The reaction device of claim 7 which also includes a connector connecting the adapter to the lift rod and wherein the shank of the adapter includes internal threads and the connector includes an externally threaded portion that mates with the internal threads to connect the adapter to the lift rod.

12. The reaction device of claim 1 which further includes an anti-rotation feature disposed between the housing and the lift rod to prevent rotation of the lift rod relative to the housing.

13. The reaction device of claim 12 wherein the anti-rotation feature includes a noncircular cross sectional portion of the lift rod and an opening in the housing through which the lift rod extends.

14. The reaction device of claim 13 wherein the noncircular cross sectional area of the opening is defined at least in part by an insert carried by the housing.

15. The reaction device of claim 13 wherein the noncircular cross sectional area of the lift rod is defined by a flat surface formed on the lift rod.

16. The reaction device of claim 1 wherein the housing also includes a base removably connected to the casing wherein the biasing member engages the base at one end and the lift rod at its other end to yieldably bias the lift rod away from the base.