Pneumatic cylinder motor with end-of-travel cushioning mechanism
AssigneeShoketsu Kinzoku Kogyo Kabushiki Kaisha
InventorJunya Kaneko
Life of this patent
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Abstract
A cushioning mechanism in a pneumatic cylinder utilizing a supplied air pressure, and a method of cushioning a piston in the pneumatic cylinder. Cushioning chambers are provided at opposite ends of a cylinder body of the pneumatic cylinder. Respective differential pressure valves and relief valves are provided between each of the cushioning chambers and an air supply. A cushioning member is disposed between each cushioning chamber and a cylinder bore. Air supplied under pressure from the air supply is stored in one of the cushioning chambers. When the piston is displaced to push the cushioning member, the air in the cushioning chamber is compressed to cushion the piston. As the cushioning member is moved a prescribed interval, the cushioning chamber is vented to atmosphere.
Claims9
A pneumatic cylinder with a cushioning mechanism, comprising:
- (a) a cylinder body having a first cushioning chamber at one end thereof and a second cushioning chamber at an opposite end thereof, said cylinder body having first and second inlet/outlet ports at the ends thereof, respectively, said first inlet/outlet port and said first cushioning chamber communicating with each other through a first air passage, said second inlet/outlet port and said second cushioning chamber communicating with each other through a second air passage:
- (b) a piston slidably movable in said cylinder body;
- (c) a first cushioning member displaceably mounted in said first cushioning chamber and extending toward said piston for being pushed thereby;
- (d) a second cushioning member displaceably mounted in said second cushioning chamber and extending toward said piston for being pushed thereby;
- (e) an air supply connected to said first and second inlet/outlet ports through a common directional control valve;
- (f) a first valve body disposed in said first air passage for adjusting an air pressure from said air supply and supplying the adjusted air pressure into said first cushioning chamber to displace said first cushioning member;
- (g) a second valve body disposed in said first air passage for discharging compressed air from said first cushioning chamber to said first inlet/outlet port when the pressure of air compressed in said first cushioning chamber by said first cushioning member displaced by being pushed by said piston exceeds a predetermined level;
- (h) a third valve body disposed in said second air passage for adjusting an air pressure from said air supply and supplying the adjusted air pressure into said second cushioning chamber to displace said second cushioning member;
- (i) a fourth valve body disposed in said second air passage for discharging compressed air from said second cushioning chamber to said second inlet/outlet port when the pressure of air compressed in said second cushioning chamber by said seocnd cushioning member displaced by being pushed by said piston exceeds a predetermined level;
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- (j) respective disk members integral with said first and second cushioning members, respectively, dividing each of said first and second cushioning chambers into two chambers, each of said disk members having a passage providing communication between said two chambers.
Dependencies are inferred from the claim text.