CN216518965U - Balance oil cylinder with oil inlet at center of piston rod - Google Patents
Balance oil cylinder with oil inlet at center of piston rod Download PDFInfo
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- CN216518965U CN216518965U CN202123368748.1U CN202123368748U CN216518965U CN 216518965 U CN216518965 U CN 216518965U CN 202123368748 U CN202123368748 U CN 202123368748U CN 216518965 U CN216518965 U CN 216518965U
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Abstract
The utility model provides a balance oil cylinder with oil fed in the center of a piston rod, which comprises an oil cylinder pipe and a piston rod, wherein the piston rod is movably arranged in the oil cylinder pipe, the axial center of the piston rod is penetrated and opened with a central hole, the upper end of the central hole is provided with an oil inlet, the lower end of the piston rod is provided with an anti-falling block, the central hole penetrates to the lower end of the anti-falling block, the lower end of the oil cylinder pipe is provided with a lower end cover through an O-shaped sealing ring, the upper end of the oil cylinder pipe is fixedly sleeved with an upper end cover, the piston rod is hermetically arranged on the inner wall of the upper end cover through a UN sealing ring, the UN sealing ring is embedded and arranged in the inner wall of the upper end cover, and a sealed oil cavity is formed between the piston rod and the oil cylinder pipe through the upper end cover and the lower end cover; the oil inlet pipe of the oil cylinder needs to move along with the moving part, and the oil pipe is easy to bend and break; and the length of the oil inlet pipe can be greatly shortened, and the cost is saved.
Description
Technical Field
The utility model belongs to the technical field of balance oil cylinders of numerical control machines, and particularly relates to a balance oil cylinder with an oil inlet at the center of a piston rod.
Background
The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion, has simple structure and reliable work, can remove a transmission device when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to hydraulic systems of various machines, and the output force of the hydraulic cylinder is in direct proportion to the effective area of a piston and the pressure difference between the two sides of the piston; in a conventional machine tool machining center, a balance cylinder is generally used for balancing the weight of a machine tool up-and-down movement component.
Conventionally used balance oil cylinders are divided into a piston rod power type and an oil cylinder pipe power type, the existing oil cylinder pipe power type is usually characterized in that a piston rod is fixed, an oil cylinder pipe is connected to an up-and-down moving part of a machine tool to perform weight balance, an oil inlet is usually and directly arranged on an end cover at the lower end of the oil cylinder pipe, so that an oil injection pipe moves along with the oil cylinder pipe, and the oil injection pipe is easy to bend and break; and the length of the oil inlet pipe can be greatly shortened, and the cost is saved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that an oil filling pipe is easy to bend and break and the length of the oil cylinder pipe is long in the environment of the movement of the oil cylinder pipe in the existing balance oil cylinder in the background technology, and therefore, the balance oil cylinder with the oil inlet at the center of a piston rod is provided.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides a balanced hydro-cylinder of piston rod center oil feed, includes hydro-cylinder pipe and piston rod, piston rod movable mounting is intraductal at the hydro-cylinder, piston rod axial direction center runs through to open there is the centre bore, the centre bore upper end is provided with the oil inlet, the anticreep piece is installed to the piston rod lower extreme, the centre bore runs through to anticreep piece lower extreme, the bottom end cover is installed through O type sealing washer to hydro-cylinder pipe lower extreme, hydro-cylinder pipe upper end fixedly connected with has the upper end cover, the piston rod passes through UN sealing washer seal installation at the upper end cover inner wall, UN sealing washer embedding is installed in the upper end cover inner wall, form sealed oil pocket through upper end cover and bottom end cover between piston rod and the hydro-cylinder pipe.
Preferably, the lower part of the outer side of the upper end cover is provided with an air outlet which is communicated with the sealing oil cavity.
Preferably, the upper end of the inner ring of the upper end cover is embedded with a dustproof ring.
Preferably, a steiner seal ring is further installed in the upper end cover, and the steiner seal ring is arranged below the UN seal ring.
Preferably, the inner ring of the upper end cover is positioned below the steckel seal sealing ring and above the UN sealing ring, and guide belts are arranged on the inner wall of the inner ring of the upper end cover in an embedded mode.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, oil is fed directly through the piston rod, the piston rod is used as a fixing part, the oil injection pipe can be fixedly connected to the oil inlet at the upper end of the piston rod, oil is introduced into the sealed oil cavity through the central hole, the oil cylinder pipe is pushed or pulled back, the weight balance of the up-and-down moving part of the machine tool is realized, the oil cylinder pipe is suitable for being used in the machine tool environment where the piston rod is fixed and the oil cylinder pipe is connected with the moving part, the oil is prevented from being introduced from the end cover, the oil inlet pipe of the oil cylinder needs to move along with the moving part, and the oil pipe is easy to bend and break; and the length of the oil inlet pipe can be greatly shortened, and the cost is saved.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a piston rod according to an embodiment of the present invention;
the embodiment of the utility model mainly comprises the following component symbols:
the oil cylinder comprises an oil cylinder pipe-1, a piston rod-2, a central hole-201, an oil inlet-202, an anti-falling block-3, a lower end cover-4, an O-shaped sealing ring-401, an upper end cover-5, an exhaust port-501, a UN sealing ring-502, a steckel sealing ring-503, a dust ring-504 and a guide belt-505.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.
As shown in fig. 1 to 3, a balance cylinder of piston rod center oil feed, including hydro-cylinder pipe 1 and piston rod 2, 2 movable mounting of piston rod are in hydro-cylinder pipe 1, 2 axial direction centers of piston rod run through to open there is centre bore 201, centre bore 201 upper end is provided with oil inlet 202, anticreep piece 3 is installed to 2 lower extremes of piston rod, centre bore 201 runs through to anticreep piece 3 lower extreme, 1 lower extreme of hydro-cylinder pipe installs lower extreme cover 4 through O type sealing washer 401, the fixed cover in 1 upper end of hydro-cylinder pipe has upper end cover 5, piston rod 2 passes through UN sealing washer 502 seal installation at upper end cover 5 inner wall, UN sealing washer 502 embedding is installed in 5 inner walls of upper end cover, form sealed oil pocket through upper end cover 5 and lower extreme cover 4 between piston rod 2 and the hydro-cylinder pipe 1.
According to the utility model, oil is fed directly through the piston rod 2, the piston rod 2 is used as a fixing part, the oil injection pipe can be fixedly connected to an oil inlet 202 at the upper end of the piston rod 2, oil is fed into the sealed oil cavity through the central hole 201, the oil cylinder pipe 1 is pushed or pulled back, the weight balance of the up-and-down moving part of the machine tool is realized, the oil injection pipe is suitable for being used in the machine tool environment where the piston rod 2 is fixed and the oil cylinder pipe 1 is connected with the moving part, and the oil is prevented from being fed from an end cover, so that the oil inlet pipe and the oil pipe of the oil cylinder need to move along with the moving part, and the oil pipe is easy to bend and break; and the length of the oil inlet pipe can be greatly shortened, and the cost is saved.
An air outlet 501 is formed in the lower portion of the outer side of the upper end cover 5, and the air outlet 501 is communicated with the sealed oil cavity.
And a dustproof ring 504 is embedded in the upper end of the inner ring of the upper end cover 5, so that dust is prevented from entering the sealed oil cavity from the piston port to pollute hydraulic oil.
A steiner seal ring 503 is also installed in the upper end cover 5, and the steiner seal ring 503 is arranged below the UN seal ring 502.
The UN seal ring 502 is generally a U-shaped urethane hydraulic seal ring, and is an annular cover composed of one or more parts, which is fixed on one ferrule or gasket of the bearing and contacts with the other ferrule or gasket or forms a narrow labyrinth gap to prevent hydraulic oil leakage and external impurity dust intrusion; the steiner seal 503 is generally formed by a rubber O-ring and a teflon ring, and the O-ring is a force application element and provides sufficient sealing force and compensates for the teflon ring to improve the sealing effect on the hydraulic oil.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a balanced hydro-cylinder of piston rod center oil feed, includes hydro-cylinder pipe and piston rod, piston rod movable mounting is intraductal at the hydro-cylinder, its characterized in that: the piston rod axial direction center runs through and has opened the centre bore, the centre bore upper end is provided with the oil inlet, the anticreep piece is installed to the piston rod lower extreme, the centre bore runs through to anticreep piece lower extreme, the lower extreme of hydro-cylinder pipe is installed the lower extreme through O type sealing washer, the fixed cover of hydro-cylinder pipe upper end has the upper end cover, the piston rod passes through UN sealing washer seal installation at the upper end cover inner wall, UN sealing washer embedding is installed in the upper end cover inner wall, form sealed oil pocket through upper end cover and lower end cover between piston rod and the hydro-cylinder pipe.
2. The balance cylinder of claim 1, wherein: and the lower part of the outer side of the upper end cover is provided with an air outlet which is communicated with the sealing oil cavity.
3. The balance cylinder of claim 2, wherein: and a dustproof ring is embedded in the upper end of the inner ring of the upper end cover.
4. The balance cylinder of claim 3, wherein: still install the steckel seal sealing washer in the upper end cover, the steckel seal sealing washer sets up in UN sealing washer below.
5. The balance cylinder of claim 4, wherein: the inner ring of the upper end cover is positioned below the steckel seal ring and above the UN seal ring, and guide belts are arranged on the inner wall of the inner ring of the upper end cover in an embedded mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123368748.1U CN216518965U (en) | 2021-12-30 | 2021-12-30 | Balance oil cylinder with oil inlet at center of piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123368748.1U CN216518965U (en) | 2021-12-30 | 2021-12-30 | Balance oil cylinder with oil inlet at center of piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216518965U true CN216518965U (en) | 2022-05-13 |
Family
ID=81506475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123368748.1U Active CN216518965U (en) | 2021-12-30 | 2021-12-30 | Balance oil cylinder with oil inlet at center of piston rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216518965U (en) |
-
2021
- 2021-12-30 CN CN202123368748.1U patent/CN216518965U/en active Active
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