Adjustable load leveler apparatus and related methods for use with automotive manufacturing systems

Patent metadata

Field	Value
Publication number	US-11738974-B2
Application number	US-202016945967-A
Country	US
Kind code	B2
Filing date	Aug 3, 2020
Priority date	Aug 3, 2020
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

Adjustable load leveler apparatus and related methods for use with automotive manufacturing systems are disclosed. A disclosed automotive manufacturing system includes a hoist supported by a support structure and configured to carry a vehicle component. The automotive manufacturing system also includes a load leveler mechanism attached to the hoist. The load leveler mechanism includes a frame, a weight movably coupled to the frame, and an actuator operatively coupled to the weight. The automotive manufacturing system also includes control circuitry connected to the actuator and an input device connected to the control circuitry and configured to generate input data in response to a user interacting with the input device. The control circuitry is configured to move, via the actuator, the weight relative to the hoist based on the input data to adjust a levelness of the hoist.

First claim

What is claimed is:

1. An automotive manufacturing system, comprising:
a hoist supported by a support structure and configured to carry a vehicle component;
a load leveler mechanism attached to the hoist, the load leveler mechanism including a frame, a weight movably coupled to the frame, and an actuator operatively coupled to the weight;
a control circuitry connected to the actuator; and
an input device connected to the control circuitry and configured to generate input data in response to a user interacting with the input device,
wherein the control circuitry is configured to move, via the actuator, the weight relative to the hoist based on the input data to adjust a levelness of the hoist, and
wherein the weight of the load leveler mechanism is a primary weight positioned adjacent a first side of a hoist body, the load leveler mechanism including an auxiliary weight supported by the hoist body and positioned adjacent a second side of the hoist body opposite to the first side.

2. The automotive manufacturing system of claim 1 , wherein the frame of the load leveler mechanism is configured to couple to a body of the hoist and decouple from the body.

3. The automotive manufacturing system of claim 1 , wherein the load leveler mechanism includes a safety structure coupled to the frame and preventing access to the weight by the user.

4. The automotive manufacturing system of claim 1 , wherein the primary and auxiliary weights are incrementally adjustable.

5. The automotive manufacturing system of claim 1 , wherein the control circuitry is configured to present, via an output device, a production instruction notifying the user regarding how or when to interact with the input device during a production run of the manufacturing system.

6. The automotive manufacturing system of claim 1 , wherein the input device includes an operation box positioned in a manufacturing area within viewing distance of the hoist.

7. The automotive manufacturing system of claim 1 , wherein the control circuitry is configured to:
receive a user input from the input device indicative of a predefined position of the weight relative to the hoist, and
move, via the actuator, the weight to the predefined position to substantially level the hoist.

8. The automotive manufacturing system of claim 1 , wherein the input device includes switch mechanisms, and wherein the control circuitry is configured to initiate control of the actuator in response to detecting activation of one of the switch mechanisms.

9. The automotive manufacturing system of claim 8 , wherein the control circuitry is configured to:
receive a user input from the input device indicative of a first predefined direction or a second predefined direction opposite the first predefined direction,
move, via the actuator, the weight relative to the hoist in the first or second predefined direction while the one of switch mechanisms is held in an activated state, and
cease moving, via the actuator, the weight relative to the hoist when the one of the switch mechanisms changes from the activated state to a deactivated state.

10. The automotive manufacturing system of claim 1 , further including a first tilt sensor positioned on the hoist and connected to the control circuitry, wherein the control circuitry is configured to:
detect a coarse tilt angle of the hoist via the first tilt sensor, and
move, via the actuator, the weight relative to the hoist at a first speed based on the coarse tilt angle.

11. The automotive manufacturing system of claim 10 , further including a second tilt sensor, different from the first tilt sensor, positioned on the hoist and connected to the control circuitry, wherein the control circuitry is configured to:
detect a fine tilt angle of the hoist via the second tilt sensor, and
move, via the actuator, the weight relative to the hoist at a second speed, less than the first speed, based on the fine tilt angle.

12. The automotive manufacturing system of claim 11 , wherein the control circuitry is configured to:
perform a comparison of the coarse tilt angle with an auxiliary target tilt angle,
move, via the actuator, the weight (a) at the first speed when the coarse tilt angle is greater than the auxiliary target tilt angle and (b) at the second speed when the coarse tilt angle is less than or equal to the auxiliary target tilt angle.

13. The automotive manufacturing system of claim 11 , wherein the control circuitry is configured to:
perform a comparison of the fine tilt angle with a primary target tilt angle,
move, via the actuator, the weight at the second speed when the fine tilt angle is greater than the primary target tilt angle, and
cease movement, via the actuator, of the weight when the fine tilt angle is less than or equal to the primary target tilt angle.

14. The automotive manufacturing system of claim 11 , wherein the first tilt sensor includes a relatively low precision inclinometer and the second tilt sensor includes a relatively high precision inclinometer.

15. The automotive manufacturing system of claim 11 , wherein the control circuitry includes a feedback controller forming a feedback control loop with the actuator, the first tilt sensor, and the second tilt sensor.

16. The automotive manufacturing system of claim 1 , wherein the load leveler mechanism has a first operating mode associated with a first operating characteristic of the load leveler mechanism and a second operating mode associated with a second operating characteristic of the load leveler mechanism different relative to the first operating characteristic, and wherein the control circuitry is configured to:
receive a user input from the input device indicative of the second operating mode while the load leveler mechanism is in the first operating mode,
change, based on the user input, the load leveler mechanism from the first operating mode to the second operating mode, and
operate the actuator while the load leveler mechanism is in the second operating mode.

17. An adjustable load leveler mechanism for a hoist, comprising:
a frame coupled to the hoist;
a weight movable along the frame to change a center of gravity of the hoist;
an actuator operatively coupled to the weight;
an input device configured to generate a user input in response to a user interacting with the input device; and
a control circuitry configured to receive the user input from the input device and control, based on the user input, the actuator to move the weight relative to the hoist,
wherein the weight of the load leveler mechanism is a primary weight positioned adjacent a first side of a hoist body, the load leveler mechanism including an auxiliary weight supported by the hoist body and positioned adjacent a second side of the hoist body opposite to the first side.

18. A method of operating an adjustable load leveler mechanism attached to a hoist, comprising:
interacting with an output device to receive a production instruction;
lifting an object of interest off of a first handling unit via the hoist;
identifying an input device connected to a control circuitry of the adjustable load leveler mechanism, the adjustable load leveler mechanism including a frame, a weight movably coupled to the frame, and an actuator operatively coupled to the weight; and
interacting with the input device in accordance with the production instruction to cause the control circuitry to move, via the actuator, the weight relative to the hoist to adjust a levelness to the hoist,
wherein the weight of the load leveler mechanism is a primary

Assignees

• Toyota Eng & Mfg North America
• Toyota Motor Engineering & Mfg North Inc

Inventors

• Akiyama Shigeo

Classifications

• B66C13/04 Primary

  Auxiliary devices for controlling movements of suspended loads, or preventing cable slack · CPC title

• B62D65/022

  Transferring or handling sub-units or components, e.g. in work stations or between workstations and transportation systems · CPC title

• B66C1/10

  by mechanical means · CPC title

• B66C1/107 Primary

  for lifting engines · CPC title

• B66C11/12

  having hoisting gear adapted to special load-engaging elements and not otherwise provided for · CPC title