CN213775887U - Double-acting self-unloading piston type oil cylinder - Google Patents
Double-acting self-unloading piston type oil cylinder Download PDFInfo
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- CN213775887U CN213775887U CN202021663719.0U CN202021663719U CN213775887U CN 213775887 U CN213775887 U CN 213775887U CN 202021663719 U CN202021663719 U CN 202021663719U CN 213775887 U CN213775887 U CN 213775887U
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Abstract
A double-acting self-unloading piston type oil cylinder is composed of a guide sleeve, a cylinder barrel, a piston assembly, a gasket, a back cap, a cylinder bottom, a valve core, a valve sleeve and a valve rod, and is characterized in that the cylinder barrel and the cylinder bottom are welded into a whole; the valve rod is arranged in the valve sleeve hole, then the valve core is riveted on the valve rod, and the valve core is arranged in the piston rod hole; the piston assembly is sleeved on the piston rod, the gasket is locked by the back cap and then is arranged in the cylinder barrel, and the gasket is tightly sealed by the guide sleeve; the right end of the piston rod is provided with an oil inlet groove, an oil inlet hole and a hole for installing a valve core, and is provided with an external thread; the right end of the cylinder of the valve rod is provided with a conical sealing surface, the round rod part is provided with 4 oil grooves, and the left end of the round rod part is riveted with a valve core; two ends of the valve sleeve are provided with taper holes for sealing; the back cap is provided with 2 oblique oil holes; pressure oil enters from a left end oil inlet and enters into a C hole through a B hole, the valve rod is pushed to move to the right to the conical surface on the valve rod to be matched with the conical hole on the valve sleeve to seal oil, the pressure oil pushes the piston to move to the right until the piston touches the cylinder bottom, at the moment, the valve core moves to the left, the pressure oil enters into the piston rod axial hole through the C cavity and 4 oil grooves on the valve rod to enter into the inclined hole on the back cap and flows out of an unloading port at the right end.
Description
Technical Field
The invention relates to the technical field of hydraulic machinery, in particular to the technical field of oil cylinder design.
Background
When the piston stroke reaches the bottom of the cylinder, the pressure of the double-acting piston type oil cylinder rises, mechanical parts and a hydraulic system are easily damaged, and energy is wasted.
Disclosure of Invention
The invention aims to solve the problems that when a piston travels to the bottom of a cylinder, the pressure of the oil cylinder rises, mechanical parts and a hydraulic system are damaged, and energy is wasted.
A double-acting self-unloading piston type oil cylinder is composed of a guide sleeve, a cylinder barrel, a piston assembly, a gasket, a back cap, a cylinder bottom, a valve core, a valve sleeve and a valve rod, and is characterized in that the cylinder barrel and the cylinder bottom are welded into a whole; the valve rod is arranged in the valve sleeve hole, then the valve core is riveted on the valve rod, and the valve core is arranged in the piston rod hole; the piston assembly is sleeved on the piston rod, and is locked by a back cap after being cushioned by a gasket; the assembled components are arranged into a cylinder barrel and tightly sealed by a guide sleeve; the guide sleeve is provided with an internal thread matched with the cylinder barrel; the cylinder barrel is a fine steel pipe and is welded with 2 oil inlets, and the left end of the cylinder barrel is provided with external threads matched with the guide sleeve; the piston rod is made of round steel, the outer surface of the piston rod is subjected to chromium plating and polishing after grinding, and the right end of the piston rod is provided with an oil inlet groove, an oil inlet hole, a hole for installing a valve core and an external thread matched with the back cap; the left end of the valve rod is a cylinder, the right end of the cylinder is provided with a conical sealing surface, the right round rod part is provided with 4 oil grooves, and the left end of the valve rod is riveted with a valve core; the valve sleeve is a casting, and two ends of the valve sleeve are provided with taper holes for sealing; the piston is a ductile iron piece and is provided with 2 grooves provided with oil seals; the back cap is a round steel piece, and an inner hole is provided with an internal thread matched with the piston rod and 2 oblique oil holes; pressure oil enters from a left end oil inlet and enters into a C hole through a B hole, the valve rod is pushed to move to the right to the conical surface on the valve rod to be matched with the conical hole on the valve sleeve to seal oil, the pressure oil pushes the piston to move to the right until the piston touches the cylinder bottom, at the moment, the valve core moves to the left, the pressure oil enters into the piston rod axial hole through the C cavity and 4 oil grooves on the valve rod to enter into the inclined hole on the back cap and flows out of an unloading port at the right end. Pressure oil enters from a right-end oil inlet, the pressure oil enters 4 oil grooves in the valve rod through the inclined oil holes in the back cap to push the valve rod to move left, the valve core moves left to block the oil on the valve core, and the pressure oil pushes the piston to move left in a reciprocating manner to realize the reciprocating motion of the piston rod.
Drawings
Fig. 1 is a front view of the present invention with the piston at the left end and pressurized oil opening to an oil inlet from the left end.
In the figure, a big hole of a guide sleeve (1) is an internal thread, a sealing ring (omitted in the figure) is arranged on the plane, a small hole B for oil inlet is arranged on the plane, a cylinder barrel (2) is a refined steel pipe and is welded with 2 oil inlets, the right end of the cylinder barrel is welded with the bottom of the cylinder, and the left end of the cylinder barrel is provided with an external thread matched with the guide sleeve; 2 sealing grooves for installing sealing rings are arranged on the piston (3); the back cap (5) is provided with an internal thread and an inclined oil hole, the cylinder bottom (6) is welded on the cylinder barrel, and a hole G for connection is formed; the valve core (7) is provided with a conical surface for sealing oil, two ends of the valve sleeve (8) are provided with conical holes for sealing, the valve rod (9) is arranged in the hole of the valve sleeve (8), and the valve core is riveted at the right end of the valve rod; the piston rod (10) is made of round steel through grinding and polishing, a radial hole C is formed in the piston rod, an axial hole for installing a valve sleeve is formed in the piston rod, and an external thread for screwing a back cap is formed at the right end of the piston rod;
FIG. 2 is a front view of the present invention, in which the piston is at the right end, the valve core (7) touches the bottom plane of the cylinder, the valve rod moves to the left, and the pressure oil is unloaded through the groove in the middle of the valve rod and the inclined hole on the back cap and the right oil port; the parts are the same as in fig. 1;
fig. 3 is a front view of the present invention, in this view, the piston is at the right end, the oil inlet at the right end starts to feed oil, the pressure oil pushes the piston to move left to close through 4 oil grooves on the valve core (7), and the pressure oil pushes the piston to move left. The parts are the same as in fig. 1;
FIG. 4 is a combination diagram of a back cap (5), a valve core (7), a valve sleeve (8) and a valve rod (9) in the invention, wherein the back cap (5) is provided with internal threads and an inclined oil hole, the valve core (7) is provided with a conical surface for sealing oil, two ends of the valve sleeve (8) are provided with conical holes for sealing, the valve rod (9) is arranged in the hole of the valve sleeve (8), and the valve core is riveted and pressed at the right end of the valve rod;
FIG. 5 is a combination view of the valve body (7) and the valve stem (9) in the present invention
In the figure, a valve core (7) is provided with a conical surface for sealing oil, the right side of a cylinder at the left end of a valve rod (9) is provided with a conical surface for sealing oil, 4 oil grooves are arranged on the valve rod, and the figure C is a cross-sectional view of the valve rod and is provided with 4 oil grooves;
FIG. 6 is a right end view of the piston rod (10) of the present invention
In the figure, D1 is a circumferential oil inlet groove, C is a radial oil hole, D2 is an axial oil hole and is used for installing a valve sleeve (8), and D3 is an external thread and is used for screwing a back cap (5);
Detailed Description
A double-acting self-unloading piston type oil cylinder is composed of a guide sleeve, a cylinder barrel, a piston assembly, a gasket, a back cap, a cylinder bottom, a valve core, a valve sleeve and a valve rod, and is characterized in that the cylinder barrel and the cylinder bottom are welded into a whole; the valve rod is arranged in the valve sleeve hole, then the valve core is riveted on the valve rod, and the valve core is arranged in the piston rod hole; the piston assembly is sleeved on the piston rod, and is locked by a back cap after being cushioned by a gasket; the assembled components are arranged into a cylinder barrel and are compressed by a guide sleeve; the guide sleeve is provided with an internal thread matched with the cylinder barrel; the cylinder barrel is a fine steel pipe and is welded with 2 oil inlets, and the left end of the cylinder barrel is provided with external threads matched with the guide sleeve; the piston rod is made of round steel, the outer surface of the piston rod is subjected to chromium plating and polishing after grinding, and the right end of the piston rod is provided with an oil inlet groove, an oil inlet hole, a hole for installing a valve core and an external thread matched with the back cap; the left end of the valve rod is a cylinder, the right end of the cylinder is provided with a conical sealing surface, the right round rod part is provided with 4 oil grooves, and the left end of the valve rod is riveted with a valve core; the valve sleeve is a casting, and two ends of the valve sleeve are provided with taper holes for sealing; the piston is a ductile iron piece and is provided with 2 grooves provided with oil seals; the back cap is a round steel piece, and an inner hole is provided with an internal thread matched with the piston rod and 2 oblique oil holes; pressure oil enters from a left end oil inlet and enters into a C hole through a B hole, the valve rod is pushed to move to the right to the conical surface on the valve rod to be matched with the conical hole on the valve sleeve to seal oil, the pressure oil pushes the piston to move to the right until the piston touches the cylinder bottom, at the moment, the valve core moves to the left, the pressure oil enters into the piston rod axial hole through the C cavity and 4 oil grooves on the valve rod to enter into the inclined hole on the back cap and flows out of an unloading port at the right end. Pressure oil enters from a right-end oil inlet, the pressure oil enters 4 oil grooves in the valve rod through the inclined oil holes in the back cap to push the valve rod to move left, the valve core moves left to block the oil on the valve core, and the pressure oil pushes the piston to move left in a reciprocating manner to realize the reciprocating motion of the piston rod. Except the special design of the unloading part, the rest structure is basically the same as that of the common double-acting oil cylinder.
Claims (1)
1. A double-acting self-unloading piston type oil cylinder is composed of a guide sleeve, a cylinder barrel, a piston assembly, a gasket, a back cap, a cylinder bottom, a valve core, a valve sleeve and a valve rod, and is characterized in that the cylinder barrel and the cylinder bottom are welded into a whole; the valve rod is arranged in the valve sleeve hole, then the valve core is riveted on the valve rod, and the valve core is arranged in the piston rod hole; the piston assembly is sleeved on the piston rod, and is locked by a back cap after being cushioned by a gasket; the assembled components are arranged into a cylinder barrel and tightly sealed by a guide sleeve; the guide sleeve is provided with an internal thread matched with the cylinder barrel; the cylinder barrel is a fine steel pipe and is welded with 2 oil inlets, and the left end of the cylinder barrel is provided with external threads matched with the guide sleeve; the piston rod is made of round steel, the outer surface of the piston rod is subjected to chromium plating and polishing after grinding, and the right end of the piston rod is provided with an oil inlet groove, an oil inlet hole, a hole for installing a valve core and an external thread matched with the back cap; the left end of the valve rod is a cylinder, the right end of the cylinder is provided with a conical sealing surface, the right round rod part is provided with 4 oil grooves, and the left end of the valve rod is riveted with a valve core; the valve sleeve is a casting, and two ends of the valve sleeve are provided with taper holes for sealing; the piston is a ductile iron piece and is provided with 2 grooves provided with oil seals; the back cap is a round steel piece, and the inner hole is provided with an internal thread matched with the piston rod and 2 inclined oil holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021663719.0U CN213775887U (en) | 2020-08-07 | 2020-08-07 | Double-acting self-unloading piston type oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021663719.0U CN213775887U (en) | 2020-08-07 | 2020-08-07 | Double-acting self-unloading piston type oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213775887U true CN213775887U (en) | 2021-07-23 |
Family
ID=76902688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021663719.0U Active CN213775887U (en) | 2020-08-07 | 2020-08-07 | Double-acting self-unloading piston type oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213775887U (en) |
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2020
- 2020-08-07 CN CN202021663719.0U patent/CN213775887U/en active Active
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