Cylinder

Patent metadata

Field	Value
Publication number	US-9470249-B2
Application number	US-201213726542-A
Country	US
Kind code	B2
Filing date	Dec 25, 2012
Priority date	Feb 17, 2012
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A cylinder includes a cylinder body assembly, a cylinder rod assembly, and a piston assembly. The cylinder body assembly includes a cylinder body. The cylinder body defines a receiving chamber. The cylinder rod assembly includes a rod fixed with the cylinder body. The rod includes an inclined resisting surface. The piston assembly includes a piston, a piston rod, and one or more resisting member. The piston is slidably received in the receiving chamber and sleeved on the rod. The piston rod protrudes from the piston and extending out from the receiving chamber. The piston rod is sleeved on the rod, and defines a through hole. The resisting member is movably mounted in the through hole. The piston and the piston rod slide relative to the rod, which enable the resisting surface to resist the resisting member to be partially exposed from the through hole.

First claim

What is claimed is:

1. A cylinder, comprising:
a cylinder body assembly comprising a cylinder body defining a receiving chamber;
a cylinder rod assembly comprising a mounting base, a rod, and a connecting rod, the mounting base being received in the receiving chamber and defining a through hole, the rod being inserted in the mounting base through the through hole and being fixed with the mounting base by the connecting rod; the rod comprising an inclined resisting surface; and
a piston assembly comprising:
a piston slidably received in the receiving chamber and sleeved on the rod;
a piston rod protruding from the piston and extending out from the receiving chamber, the piston rod sleeved on the rod, and defining at least one through hole; and
at least one resisting member movably mounted in the at least one through hole,

wherein the rod comprises a rod body and a pushing end at a distal end of the rod body away from the piston, the pushing end comprises a first section and a second section, the first section interconnects the rod body with the second section, the first section is a frustum of a cone, the inclined resisting surface is at an outer sidewall of the first section, the second section is substantially cylindrical, and protrudes outwardly from a distal end of the first section; the piston and the piston rod slide relative to the rod, which enable the inclined resisting surface of the rod to resist the at least one resisting member to be partially exposed from the at least one through hole of the piston rod; and
wherein the piston rod is substantially hollow cylindrical, and the piston assembly further comprises a dust cover, and the dust cover is detachably mounted on the piston rod to cover an end of the piston rod away from the piston.

2. The cylinder of claim 1 , wherein the cylinder body comprises a mounting portion and a receiving portion protruding from the mounting portion, the receiving chamber passes through the mounting portion and the receiving portion, the mounting portion forms a first shoulder portion protruding from an inner sidewall thereof, the receiving portion forms a second shoulder portion protruding from an inner sidewall thereof, the first shoulder portion and the second shoulder portion separate the receiving chamber into a first chamber, a second chamber, and a third chamber, cooperatively, the piston is received in the second chamber, a part of the piston rod adjacent to the piston is received in the second chamber, and a middle portion of the piston rod is received in the third chamber.

3. The cylinder of claim 2 , wherein the mounting base is received in the first chamber and the second chamber, the mounting base is fixed with the mounting portion, and the mounting base resists the first shoulder portion.

4. The cylinder of claim 2 , wherein the piston is received in the second chamber, and an outer sidewall of the piston resists against an inner sidewall of the second chamber.

5. The cylinder of claim 2 , wherein the mounting portion defines a first air inlet hole, the receiving portion defines a second air inlet hole, the first air inlet hole communicates with the second chamber, the second air inlet hole communicates with the third chamber, the second chamber defines a through groove communicating with the second air inlet hole and the second chamber, the first air inlet hole and the through groove are positioned at opposite sides of the piston.

6. The cylinder of claim 5 , wherein a diameter of an end of the first air inlet hole away from the receiving chamber is greater than a diameter of an end thereof adjacent to the receiving chamber, a diameter of an end of the second air inlet hole away from the receiving chamber is greater than a diameter of an end thereof adjacent to the receiving chamber.

7. The cylinder of claim 1 , wherein the at least one resisting member is a ball, and a diameter of the at least one resisting member is larger than a diameter of the at least one through hole.

8. A cylinder, comprising:
a cylinder body assembly comprising a cylinder body defining a receiving chamber;
a cylinder rod assembly comprising a mounting base, a rod, and a connecting rod, the mounting base being received in the receiving chamber and defining a through hole, the rod being inserted in the mounting base through the through hole and being fixed with the mounting base by the connecting rod; the rod comprising an inclined resisting surface; and
a piston assembly comprising:
a piston slidably received in the receiving chamber and sleeved on the rod;
a piston rod protruding from the piston and extending out from the receiving chamber, the piston rod sleeved on the rod, and defining at least one through hole; and
at least one resisting member movably mounted in the at least one through hole,

wherein the rod comprises a rod body and a pushing end at a distal end of the rod body away from the piston, the pushing end comprises a first section and a second section, the first section interconnects the rod body with the second section, the first section is a frustum of a cone, the inclined resisting surface is at an outer sidewall of the first section, the second section is substantially cylindrical, and protrudes outwardly from a distal end of the first section; the piston and the piston rod slide relative to the rod, which enable the inclined resisting surface of the rod to resist the at least one resisting member to be partially exposed from the at least one through hole of the piston rod.

9. The cylinder of claim 8 , wherein the cylinder body comprises a mounting portion and a receiving portion protruding from the mounting portion, the receiving chamber passes through the mounting portion and the receiving portion, the mounting portion forms a first shoulder portion protruding from an inner sidewall thereof, the receiving portion forms a second shoulder portion protruding from an inner sidewall thereof, the first shoulder portion and the second shoulder portion separate the receiving chamber into a first chamber, a second chamber, and a third chamber, cooperatively, the piston is received in the second chamber, a part of the piston rod adjacent to the piston is received in the second chamber, and a middle portion of the piston rod is received in the third chamber.

10. The cylinder of claim 9 , wherein the mounting base is received in the first chamber and the second chamber, the mounting base is fixed with the mounting portion, and the mounting base resists the first shoulder portion.

11. The cylinder of claim 9 , wherein the piston is received in the second chamber, and an outer sidewall of the piston resists against an inner sidewall of the second chamber.

12. The cylinder of claim 9 , wherein the mounting portion defines a first air inlet hole, the receiving portion defines a second air inlet hole, the first air inlet hole communicates with the second chamber, the second air inlet hole communicates with the third chamber, the second chamber defines a through groove communicating with the second air inlet hole and the second chamber, the first air inlet hole and the through groove are positioned at opposite sides of the piston.

13. The cylinder of claim 12 , wherein a diameter of an end of the first air inlet hole away from the receiving chamber is greater than a diameter of an end thereof adjacent to the receiving chamber, a diameter of an end of the second air inlet hole away from the receiving chamber is greater than a diameter of an end thereof adjacent to the receiving chamber.

14. The cylinder of claim 8 , wherein the at least one resisting member is a ball, and a diameter of the at least one re

Assignees

• Xu Huan-Fan
• He Jun
• Fu Tai Hua Ind (Shenzhen) Co Ltd
• Hon Hai Prec Ind Co Ltd

Inventors

• Xu Huan-Fan
• He Jun

Classifications

• F15B15/1466 Primary

  Hollow piston sliding over a stationary rod inside the cylinder · CPC title

• F15B15/1457 Primary

  Piston rods (F15B15/1447 takes precedence) · CPC title