Title:
FEED LIFTING ROCK SHAFT ASSEMBLY AND SEWING MACHINE PROVIDED WITH FEED LIFTING ROCK SHAFT ASSEMBLY
Document Type and Number:
WIPO Patent Application WO/2021/184646
Kind Code:
A1
Abstract:
A feed lifting rock shaft assembly, comprising a front feed lifting rock shaft (12) and a rear feed lifting rock shaft (18) that are arranged in parallel; the front feed lifting rock shaft is fixedly provided with a front feed lifting rock crank (14), and the rear feed lifting rock shaft is fixedly provided with a rear feed lifting rock crank (16); the front feed lifting rock crank is rotatably connected to a first end of a front feed lifting rock swing plate (20), and the rear feed lifting rock crank is rotatably connected to a first end of a rear feed lifting rock swing plate (21); and a second end of the front feed lifting rock swing plate and a second end of the rear feed lifting rock swing plate are both rotatably connected to one end of a driving device, respectively. After the driving device carries out driving, the included angle between the front feed lifting rock crank and the rear feed lifting rock crank changes so that the front feed lifting rock shaft and the rear feed lifting rock shaft rotate relative one another so as to adjust the height of a feed dog. The present invention also relates to a sewing machine provided with the described feed lifting rock shaft assembly. The feed lifting rock shaft assembly can conveniently and quickly control the height of a feed dog, thereby achieving the function of automatically adjusting the height of the teeth of the feed dog.
Inventors:
HUANG MINGXUE (CN)
WAN YIMING (CN)
LIN XIAOXIAO (CN)
HONG ZHIMING (CN)
WAN YIMING (CN)
LIN XIAOXIAO (CN)
HONG ZHIMING (CN)
Application Number:
PCT/CN2020/107004
Publication Date:
September 23, 2021
Filing Date:
August 05, 2020
Export Citation:
Assignee:
JACK SEWING MACHINE CO LTD (CN)
International Classes:
D05B27/02; D05B27/24
Foreign References:
| CN111197202A | 2020-05-26 | |||
| CN105088548A | 2015-11-25 | |||
| JPH04156883A | 1992-05-29 | |||
| CN109371576A | 2019-02-22 | |||
| JPH119867A | 1999-01-19 | |||
| CN104878522A | 2015-09-02 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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