A boom limiting system

Abstract

A boom limiting system is applied to a boom of a crane, including a speed booster, a circuit breaker, and a push rod. The speed booster is connected to the boom and drives the boom to operate. The circuit breaker is connected to the speed booster, and the push rod is connected to the boom and moves in conjunction with the boom. When the boom moves to a limited position, the push rod touches the circuit breaker, causing the circuit breaker to cut off power to the speed booster and stop the boom's operation. This prevents the speed booster from burning out due to continuous high-load operation, thereby limiting the boom's operating stroke and protecting the speed booster.

Claims

1. A boom limiting system applied to a boom of a crane, the boom limiting system comprising: A speed booster is connected to the boom and drives the boom to operate; a circuit breaker is connected to the speed booster; a push rod is connected to the boom and moves in conjunction with the boom. When the boom moves to a limit position, the push rod touches the circuit breaker, causing the circuit breaker to cut off the power to the speed booster and stop the boom from operating.

2. The boom limiting system as described in claim 1, wherein both the push rod and the circuit breaker are located at the bottom end of the boom.

3. The boom limiting system as described in claim 1, wherein the circuit breaker triggers the circuit breaker to disconnect power to the accelerator based on a rotational speed value of the accelerator.

4. The boom limiting system as described in claim 1, wherein the push rod, the speed booster and the circuit breaker are powered by a power unit of the crane.

5. The boom limiting system as described in claim 4, wherein the power unit includes an engine.

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