US 12,135,047 B2
Cylinder connection assembly, cylinder and tightening module
Michael Wueste, Wesel (DE)
Assigned to ATLAS COPCO INDUSTRIAL TECHNIQUE AB, Stockholm (SE)
Appl. No. 17/921,838
Filed by ATLAS COPCO INDUSTRIAL TECHNIQUE AB, Stockholm (SE)
PCT Filed Apr. 29, 2021, PCT No. PCT/EP2021/061271
§ 371(c)(1), (2) Date Oct. 27, 2022,
PCT Pub. No. WO2021/219789, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 202020706199.0 (CN), filed on Apr. 30, 2020.
Prior Publication US 2023/0175535 A1, Jun. 8, 2023
Int. Cl. F15B 15/14 (2006.01); B23P 19/06 (2006.01); B25B 21/00 (2006.01); B25B 23/04 (2006.01)
CPC F15B 15/149 (2013.01) [B23P 19/06 (2013.01); B25B 21/00 (2013.01); B25B 23/04 (2013.01); F15B 15/1433 (2013.01); F15B 15/1438 (2013.01); F15B 15/1471 (2013.01); F15B 2211/7056 (2013.01); F15B 2211/8855 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A cylinder, comprising a cylinder connection assembly comprising a ventilation connection sleeve sleeved on a piston shaft of the cylinder, wherein the ventilation connection sleeve is fixedly provided in a cylinder barrel of the cylinder and separates an inner cavity of the cylinder barrel to form a front air chamber and a rear air chamber, a first ventilation hole communicating with the front air chamber and a second ventilation hole communicating with the rear air chamber are provided on the ventilation connection sleeve, so that when a compressed gas is filled into the front air chamber through the first ventilation hole, or when the compressed gas is filled into the rear air chamber through the second ventilation hole, a piston assembly in the cylinder barrel can move axially, wherein the cylinder further comprises a spline shaft and a drive shaft; wherein,
the drive shaft is sleeved on the spline shaft and is connected to the spline shaft by spline;
the piston assembly comprises the piston shaft, and a front piston and a rear piston which are each fixedly provided on the piston shaft, the piston shaft is sleeved on the drive shaft and both can move axially in a synchronous way, the ventilation connection sleeve is located between the front piston and the rear piston, the front air chamber is formed between the front piston and the ventilation connection sleeve, the rear air chamber is formed between the rear piston and the ventilation connection sleeve, so that when the compressed air is filled into the front air chamber or the rear air chamber, the piston assembly moves axially and drives the drive shaft to move axially and circumferentially.