Title:
CRANKSHAFT OF SEVEN-BELLCRANK SIX-SUPPORT STRUCTURE AND MACHINING PROCESS THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/173391
Kind Code:
A1
Abstract:
A crankshaft of a seven-bellcrank six-support structure. A through-type central lubricating oil hole (20) is formed in the crankshaft and located at the rotation center of an input shaft (1); branch lubricating oil holes communicated with the through-type central lubricating oil hole (20) are formed in all connecting rods; the front three bellcranks and the rear three bellcranks of the crankshaft are mirror-symmetrically distributed relative to a middle bellcrank; and a keyway (28) is formed on the input shaft (1) of the crankshaft. The crankshaft is different from a traditional seven-bellcrank that needs eight supports, and only needs six supports, is smaller in required size, and is not fully supported. Further provided is a machining method for a crankshaft, comprising the following steps: performing rough machining on the crankshaft by using a turning-milling composite machining center, i.e., sequentially performing rough turning, fine turning, fine milling, and milling machining on a keyway (28), and performing drilling machining on a through-type central lubricating oil hole (20) and all branch lubricating oil holes; and performing fine grinding on the crankshaft by using a numerically controlled crankshaft grinding machine. According to the method, a high-precision device is used for machining, so that high-speed cutting machining can be achieved, a requirement for machining precision can also be satisfied, guarantee is provided for the machining precision of a seven-bellcrank six-support crankshaft, and the machining efficiency of the crankshaft is improved.
Inventors:
ZHANG QIANG (CN)
ZHANG RUNXIN (CN)
TIAN YING (CN)
LIU SIYUAN (CN)
ZHANG RUNXIN (CN)
TIAN YING (CN)
LIU SIYUAN (CN)
Application Number:
PCT/CN2022/081608
Publication Date:
September 21, 2023
Filing Date:
March 18, 2022
Export Citation:
Assignee:
UNIV SHANDONG SCIENCE & TECH (CN)
International Classes:
F16C3/08; F16C3/06; F16C3/14
Foreign References:
| CN215805701U | 2022-02-11 | |||
| CN102126113A | 2011-07-20 | |||
| CN102777481A | 2012-11-14 | |||
| CN203614572U | 2014-05-28 | |||
| CN201817671U | 2011-05-04 | |||
| US6845807B1 | 2005-01-25 |
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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