Self-locking device for telescopic arm of crane

Self-locking device for telescopic arm of crane

  • CN 1,669,904 B
  • Filed: 03/18/2005
  • Issued: 08/17/2011
  • Est. Priority Date: 03/18/2005
  • Status: Active Grant
First Claim
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1. self-locking device for telescopic arm of crane, comprise the first arm and second arm of adjacent suit with it, it is characterized in that:

  • be hinged with the jam plate (3) of unilateral constrain effect and controlled the control setup that described jam plate (3) is swung at described second arm, at least be provided with a block (4) on described the first arm, described jam plate (3) connects along sidewall riding under the control of control setup on the described the first arm with described block (4) back;

    Or on described the first arm, be provided with a hole slot (6) at least, described jam plate (3) is inserted in the hole slot (6) in the control declivity of control setup and docks with described hole slot (6) forward position sidewall, described the first arm is an inner arm, described second arm is an outer arm, and described jam plate and described control setup are arranged on the head of described outer arm.

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