CN2883806Y - Pressure working cylinder preventing scratch - Google Patents
Pressure working cylinder preventing scratch Download PDFInfo
- Publication number
- CN2883806Y CN2883806Y CN 200620080151 CN200620080151U CN2883806Y CN 2883806 Y CN2883806 Y CN 2883806Y CN 200620080151 CN200620080151 CN 200620080151 CN 200620080151 U CN200620080151 U CN 200620080151U CN 2883806 Y CN2883806 Y CN 2883806Y
- Authority
- CN
- China
- Prior art keywords
- piston
- seal ring
- end cap
- pressure working
- annular groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model provides a pressure work cylinder avoiding scratching, comprising a cylinder body; wherein, a piston connected with a piston rod, a support sleeve and a cover are arranged in the cylinder body. The external diameter of the top of the piston is smaller than the external diameter of the piston, and a ring-shaped groove on which the upper sealing ring is arranged is positioned on the outer wall between the top and the piston. The outside edge of the upper sealing ring which is bell-mouthed is larger than the inside edge, the outer wall of the upper sealing ring is closely contacted with the inner wall of the cylinder body, the inner wall of the seal is closely contacted with the top of the piston, the lower end of the upper sealing ring is closely contacted with the seal; the bottom of the piston has the same shape and structure with the top; the lower sealing ring which is arranged at the bottom of the position has the same shape and structure with the upper. The utility model can solve the problem of the scratch of the cylinder and the piston rod easily caused by the feculence in the prior art.
Description
Technical field
The utility model relates to industrial oil hydraulic cylinder and cylinder technical field, specifically a kind of anti-scuffing pressure working cylinder.
Background technique
At present, be widely used in the oil hydraulic cylinder and the cylinder of industry equipment transmission, it enters in the cylinder body because of dirt in the middle of reality is used easily, cylinder body and piston rod often occur and be scratched the problem that causes dielectric leakage and can't proper functioning, reason is as follows: one, traditional oil hydraulic cylinder and cylinder, and the seal ring of being installed on its piston and the supporting sleeve, its cross section is the form of rectangle, and be installed in middle and upper part, middle part and the position, middle and lower part of piston and supporting sleeve, then there is certain clearance in the end.The reason such as come off of chip during because of the entering and normally move of dirt in the middle of the installation and maintenance, its dirt and chip move along with the to-and-fro motion of piston and piston rod in cylinder body, in it enters tip-clearance between cylinder body and piston, piston rod and the supporting sleeve, then be easy to make cylinder body and piston rod to be scratched, so make its sealing each other destroyed, produce the medium leak case, finally cause the clutch release slave cylinder can't proper functioning; Two, the end cap top end is plane, and pressure working cylinder vertically when installing and using, is easy to gather dirt, and dirt is easy to enter by the tip-clearance between piston rod and the end cap, causes scratching piston rod; Three, the upper and lower end face of piston is plane, and the dirt in the cylinder body can't be assembled the location thereon relatively, and it makes dirt move about in cylinder body easily everywhere, may enter at any time and scuffing cylinder body and piston rod the tip-clearance in.
Summary of the invention
Purpose on the utility model has provided a kind of anti-scuffing pressure working cylinder, and it can solve the problem that cylinder body is interior and piston rod is scratched by dirt easily that prior art exists.
The purpose of this utility model is achieved through the following technical solutions: anti-scuffing pressure working cylinder, it comprises cylinder body, piston, supporting sleeve, end cap are installed respectively in the cylinder body, piston rod is connected with piston, the top external diameter of piston is less than piston external diameter, offer annular groove on the wall between top and the piston, last seal ring is installed in the annular groove; Last seal ring top outer edge is horn-like greater than the inside edge, and last seal ring outer wall closely contacts with inboard wall of cylinder block, and last seal ring inwall closely contacts with the top of piston, and last seal ring lower end closely contacts with piston; The bottom of piston and piston head shape, structure are identical, and lower seal is identical with shape, the structure of last seal ring, and lower seal is installed in the bottom of piston.
For further realizing the purpose of this utility model, also can finish by the following technical programs: offer arc groove on the top end face of piston.Offer arc groove on the bottom end face of piston.The bottom internal diameter of supporting sleeve is offered annular groove greater than the supporting sleeve internal diameter on the wall between its bottom and the supporting sleeve inwall, and seal ring is installed in the annular groove; Inside edge, seal ring bottom is inverted cone-shaped greater than outer edge; The seal ring inwall closely contacts with piston rod, and the seal ring outer wall closely contacts with the bottom of supporting sleeve, and the seal ring upper end closely contacts with supporting sleeve.The top internal diameter of end cap is offered the ring recessing greater than the internal diameter of end cap on the wall between its top and the end cap inwall, and seal ring is installed in the annular groove, and inside edge, seal ring top is coniform greater than outer edge; The seal ring inwall closely contacts with piston rod, and the seal ring outer wall closely contacts with the top of end cap, and the seal ring lower end closely contacts with end cap.Connect at least one projection on the bottom of supporting sleeve.The middle top height of end cap, periphery hang down and are coniform.Connect at least one projection on the top of end cap.Upper-lower seal circle and seal ring, its outer edge is 15-70 ° to the angle of inclination of inside edge.Offer annular groove on the last seal ring, the notch of annular groove is arranged in the annular groove, and corresponding with the lower end, top.
The beneficial effect that the utility model can produce: because of at the top of piston and the bottom install respectively and be trumpet-shaped upper-lower seal circle, and on the top of piston, bottom end face, offer arc groove respectively, piston is when to-and-fro motion, dirt in the cylinder body then can be collected at along the plane of inclination of upper-lower seal circle in the arc groove, to prevent that dirt from moving about everywhere, may enter at any time in the tip-clearance and scratch cylinder body; Because of in the supporting sleeve lower end and end cap upper end install respectively and be inverted cone and cone shape seal ring, it can effectively avoid dirt to enter supporting sleeve and end cap respectively and in the gap between the piston rod and scratch piston rod; Be sloping shape form because of the top with end cap is provided with that the middle part is high, periphery is low, clutch release slave cylinder can avoid dirt to assemble on it, so fundamentally stopped the possibility that dirt enters the gap between end cap and the piston vertically when installing and using.The utility model can thoroughly solve the critical defect that the existing piston of conventional art and piston rod are scratched easily, and extensive use can produce tangible social economic benefit.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the partial enlarged drawing of I portion among Fig. 1;
Fig. 3 is the partial enlarged drawing of II portion among Fig. 1;
Fig. 4 is the partial enlarged drawing of III portion among Fig. 1.
Embodiment
Anti-scuffing pressure working cylinder of the present utility model, it comprises cylinder body 1, piston 3, supporting sleeve 4, end cap 5 are installed respectively in the cylinder body 1, piston rod 2 is connected with piston 3, the top 3C external diameter of piston 3 is less than piston 3 external diameters, offer annular groove 3d on the wall between top 3C and the piston 3, last seal ring 3b is installed in the annular groove 3d; Last seal ring 3b top outer edge is horn-like greater than the inside edge, and last seal ring 3b outer wall closely contacts with cylinder body 1 inwall, and last seal ring 3b inwall closely contacts with the top 3c of piston 3, and last seal ring 3b lower end closely contacts with piston 3; The bottom of piston 3 and piston 3 top 3c shapes, structure are identical, and lower seal 3e is identical with shape, the structure of last seal ring 3b, and lower seal 3e is installed in the bottom of piston 3.Offer arc groove 3a on the top 3c end face of piston 3.Offer arc groove on the bottom end face of piston 3.The bottom 4c internal diameter of supporting sleeve 4 is offered annular groove 4d greater than supporting sleeve 4 internal diameters on the wall between its bottom 4c and supporting sleeve 4 inwalls, and seal ring 4b is installed in the annular groove 4d; Inside edge, seal ring 4b bottom is inverted cone-shaped greater than outer edge; Seal ring 4b inwall closely contacts with piston rod 2, and seal ring 4b outer wall closely contacts with the bottom 4c of supporting sleeve 4, and seal ring 4b upper end closely contacts with supporting sleeve 4.The top 5c internal diameter of end cap 5 is offered ring recessing 5d greater than the internal diameter of end cap 5 on the wall between its top 5c and end cap 5 inwalls, seal ring 5b is installed in the annular groove 5d, and inside edge, seal ring 5b top is coniform greater than outer edge; Seal ring 5b inwall closely contacts with piston rod 2, and seal ring 5b outer wall closely contacts with the top 5c of end cap 5, and seal ring 5b lower end closely contacts with end cap 5.The bottom 4c of supporting sleeve 4 goes up and connects at least one projection 4a.The top 5c middle part of end cap 5 is high, periphery is low is coniform.The top 5c of end cap 5 goes up and connects at least one projection 5a.Upper-lower seal circle 3b, 3e and seal ring 4b, 5b, its outer edge is 15-70 ° to the angle of inclination of inside edge.Offer annular groove 3bb on the last seal ring 3b, the notch of annular groove 3bb is arranged in the annular groove 3d, and corresponding with 3c lower end, top.
During making, process various component assemblings by above-mentioned requirements and get final product.During installation, inlet/outlet 1a, 1b that this usefulness is novel join by pipeline and pressure equipment.During work, when piston 3 pumps, upper and lower seal ring 3b, 3e are because of the top 3c that is installed in piston 3 respectively and the end periphery place of bottom, because of it is shaped as horn-like, its outer edge and the closely contact mutually of cylinder body 1 inwall, the top 3c of its inside edge and piston 3 and bottom be closely contact mutually, and it can stop effectively that dirt enters in the tip-clearance between piston and the cylinder body.
The seal ring 4b that is inverted cone-shaped is installed in the 4C port, bottom of supporting sleeve 4, its inside edge and piston rod 2 closely contact mutually, its outer edge closely contacts with the bottom 4c of supporting sleeve 4, and it can stop effectively that dirt enters in the tip-clearance between supporting sleeve 4 and the piston rod 2.
The 5c port, top of end cap 5 is installed and is cone shape seal ring 5b, its inside edge closely contacts with piston rod 2, its outer edge closely contacts with the top 5c of end cap 5, and it can stop effectively on the end cap 5 that the dirt of assembling enters in the tip-clearance between end cap 5 and the piston rod 2.
With these above-mentioned three kinds of seal form, can guarantee that piston 3 and piston rod 2 are not scratched by dirt.The top 5c end face of end cap 5 is middle part height, the peripheral low sloping shape form that is, and does not assemble dirt for making the utility model when vertically using.Equal equal portions connect six projection 5a on the top 5c end face of end cap 5, strike seal ring 5b when bouncing back for the link that prevents piston rod 2 upper ends, to guarantee the working life of seal ring 5b.The bottom 4c end face of supporting sleeve 4 connects 6 projections, is similarly and prevents that piston 3 from striking seal ring 4b when moving upward, to guarantee the working life of seal ring 4b.
It is after last seal ring 3b installing and locating that last seal ring 3b goes up the annular groove 3bb that is provided with, and it can form air bag naturally in annular groove 3d, and it is for increasing the sealing effect of going up seal ring 3b.Lower seal 3e is identical with last seal ring 3b shape structure, and it is installed in the base circle groove of piston 3.Offer arc groove 3a and arc groove respectively on the top 3c of piston 3 and the bottom, it is used to assemble dirt when satisfying the forward and reverse vertical use of the utility model.The utility model folk prescription can only be offered arc groove 3a at the top of piston 3 3c end face when vertical use.Upper-lower seal circle 3b, 3e and seal ring 4b, 5b, its outer edge is 50 ° to the inclination best angle of inside edge.
The original seal ring that is arranged on middle and upper part, middle part, middle and lower part on piston 3, supporting sleeve 4 and the end cap 5 is known technology, also can partial cancellation.
The utility model can be oil hydraulic cylinder, also can be cylinder.
Technological scheme described in the utility model is not limited only to the mode of execution of present embodiment record, can also have other mode of execution to finish the technical solution of the utility model.
The technology that the utility model is not described in detail partly is known technology.
Claims (10)
1, anti-scuffing pressure working cylinder, it comprises cylinder body (1), piston (3), supporting sleeve (4), end cap (5) are installed respectively in the cylinder body (1), piston rod (2) is connected with piston (3), it is characterized in that: top (3C) external diameter of piston (3) is less than piston (3) external diameter, offer annular groove (3d) on the wall between top (3C) and the piston (3), last seal ring (3b) is installed in the annular groove (3d); Last seal ring (3b) top outer edge is horn-like greater than the inside edge: go up seal ring (3b) outer wall and closely contact with cylinder body (1) inwall, last seal ring (3b) inwall closely contacts with the top (3c) of piston (3), and last seal ring (3b) lower end closely contacts with piston (3); The bottom of piston (3) and piston (3) top (3c) shape, structure are identical, and lower seal (3e) is identical with shape, the structure of last seal ring (3b), and lower seal (3e) is installed in the bottom of piston (3).
2, anti-scuffing pressure working cylinder according to claim 1 is characterized in that: offer arc groove (3a) on top (3c) end face of piston (3).
3, anti-scuffing pressure working cylinder according to claim 1 is characterized in that: offer arc groove on the bottom end face of piston (3).
4, anti-scuffing pressure working cylinder according to claim 1, it is characterized in that: bottom (4c) internal diameter of supporting sleeve (4) is greater than supporting sleeve (4) internal diameter, offer annular groove (4d) on the wall between its bottom (4c) and supporting sleeve (4) inwall, seal ring (4b) is installed in the annular groove (4d); Seal ring (4b) inside edge, bottom is inverted cone-shaped greater than outer edge; Seal ring (4b) inwall closely contacts with piston rod (2), and seal ring (4b) outer wall closely contacts with the bottom (4c) of supporting sleeve (4), and seal ring (4b) upper end closely contacts with supporting sleeve (4).
5, anti-scuffing pressure working cylinder according to claim 1, it is characterized in that: top (5c) internal diameter of end cap (5) is greater than the internal diameter of end cap (5), offer ring recessing (5d) on the wall between its top (5c) and end cap (5) inwall, seal ring (5b) is installed in the annular groove (5d), and seal ring (5b) inside edge, top is coniform greater than outer edge; Seal ring (5b) inwall closely contacts with piston rod (2), and seal ring (5b) outer wall closely contacts with the top (5c) of end cap (5), and seal ring (5b) lower end closely contacts with end cap (5).
6, anti-scuffing pressure working cylinder according to claim 4 is characterized in that: the bottom (4c) of supporting sleeve (4) is gone up and is connected at least one projection (4a).
7, anti-scuffing pressure working cylinder according to claim 5 is characterized in that: the middle part, top (5c) of end cap (5) is high, periphery is low is coniform.
8, according to claim 5 or 7 described anti-scuffing pressure working cylinders, it is characterized in that: the top (5c) of end cap (5) is gone up and is connected at least one projection (5a).
9, according to claim 1 or 4 or 5 described anti-scuffing pressure working cylinders, it is characterized in that: upper-lower seal circle (3b), (3e) and seal ring (4b), (5b), its outer edge is 15-70 ° to the angle of inclination of inside edge.
10, anti-scuffing pressure working cylinder according to claim 1 is characterized in that: go up on the seal ring (3b) and offer annular groove (3bb), the notch of annular groove (3bb) is arranged in the annular groove (3d), and corresponding with lower end, top (3c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620080151 CN2883806Y (en) | 2006-01-13 | 2006-01-13 | Pressure working cylinder preventing scratch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620080151 CN2883806Y (en) | 2006-01-13 | 2006-01-13 | Pressure working cylinder preventing scratch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2883806Y true CN2883806Y (en) | 2007-03-28 |
Family
ID=37956867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620080151 Expired - Fee Related CN2883806Y (en) | 2006-01-13 | 2006-01-13 | Pressure working cylinder preventing scratch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2883806Y (en) |
-
2006
- 2006-01-13 CN CN 200620080151 patent/CN2883806Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070328 |