Title:
PULLEY ASSEMBLY, TELESCOPIC BOOM AND FIRE FIGHTING TRUCK
Document Type and Number:
WIPO Patent Application WO/2021/072983
Kind Code:
A1
Abstract:
Disclosed are a pulley assembly, a telescopic boom and a fire fighting truck, the pulley assembly comprising: a pulley block frame body (10), a mounting base assembly (20) connected to the pulley block frame body (10), and a supporting shaft (30), wherein a first end of the supporting shaft (30) is connected to a mounting plate (64); a second end of the supporting shaft is connected to the mounting base assembly (20); the mounting base assembly (20) is hinged to the mounting plate (64) by means of the supporting shaft (30; the mounting base assembly (20) comprises a first limiting member (24); and the first limiting member (24) is used for limiting the mounting base assembly (20) from being separated from the supporting shaft (30). According to the pulley assembly, the risk of a fixing bolt being cut off is prevented, such that the pulley block frame body (10) and the mounting base assembly (20) can rotate around the supporting shaft (30) relative to an outer arm (60), and the pulley assembly is prevented from being damaged by a large impact force generated by sudden cutting off of the fixing bolt.
Inventors:
LIN LIMING (CN)
YAO ZHANLEI (CN)
AI GUODONG (CN)
YAO ZHANLEI (CN)
AI GUODONG (CN)
Application Number:
PCT/CN2019/130530
Publication Date:
April 22, 2021
Filing Date:
December 31, 2019
Export Citation:
Assignee:
SANY AUTOMOBILE MFG CO LTD (CN)
International Classes:
A62C27/00; B66F11/04
Foreign References:
| CN103171979A | 2013-06-26 | |||
| CN103171979A | 2013-06-26 | |||
| CN2364011Y | 2000-02-16 | |||
| CN101327893A | 2008-12-24 | |||
| JP2009012871A | 2009-01-22 | |||
| CN204281125U | 2015-04-22 | |||
| CN109780004A | 2019-05-21 |
Attorney, Agent or Firm:
YOULINK INTELLECTUAL PROPERTY LAW FIRM (CN)
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