CN203686114U - Oil cylinder piston structure in non-threaded connection - Google Patents
Oil cylinder piston structure in non-threaded connection Download PDFInfo
- Publication number
- CN203686114U CN203686114U CN201320894038.9U CN201320894038U CN203686114U CN 203686114 U CN203686114 U CN 203686114U CN 201320894038 U CN201320894038 U CN 201320894038U CN 203686114 U CN203686114 U CN 203686114U
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- China
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- piston
- oil cylinder
- end surface
- down ring
- threaded connection
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- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to an oil cylinder piston structure in non-threaded connection. The oil cylinder piston structure comprises a piston (2) and a piston rod (1), wherein the lower end of the piston rod (1) stretches into a center hole in the upper end of the piston (2), the lower end of the piston rod (1) is a cylinder portion (5) with a large diameter, the piston rod (1) is connected with a pressing ring (3) in a sleeved mode, the pressing ring (3) is in threaded connection with the center hole in the upper end face of the piston (2), the lower end face of the pressing ring (3) abuts against the upper end of the cylinder portion (5) with the large diameter, the two sides of the upper end of the pressing ring (3) are symmetrically provided with inclined grooves (6), and the inclined grooves (6) face the circumference tangential direction of the pressing ring (3). The oil cylinder piston structure is simple in structure, reduces machining precision, reduces cost, and solves the problem that coaxiality of an oil cylinder piston structure in threaded connection is not high.
Description
Technical field
The utility model relates to oil cylinder piston field, particularly relates to a kind of oil cylinder piston structure of non-threaded connection.
Background technique
Oil cylinder is the power original paper of often using in current mechanical transmission fields, its effect by piston and hydraulic oil realizes by hydraulic energy conversion and is mechanical energy, in oil cylinder, piston is important parts, its precision is very high, mostly existing piston is to adopt piston and piston rod is made of one or piston and separately production and then assembling of piston rod, the piston coaxial degree of integral type is good, precision is high, but manufacture cost is very high, now mostly be to adopt piston and piston rod separately to produce and then assembly structure, low cost of manufacture, mostly piston and piston rod are that employing is threaded, it is very high that but the coaxality of piston and piston rod requires, the piston rod being threaded is easily to lopsidedness, so just cause the stuck or excessive wear on one side of piston and cylinder body, eliminate the problems referred to above so need a kind of new Placement.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of oil cylinder piston structure of non-threaded connection, simple in structure, has reduced machining accuracy, has reduced cost, has solved the not high problem of produced coaxality that is threaded.
The utility model solves the technological scheme that its technical problem adopts: the oil cylinder piston structure that a kind of non-threaded connection is provided, comprise piston and piston rod, the lower end of described piston rod extend in the center hole of piston upper end, described piston-rod lower end is cylinder with large diameter portion, described upper cover of piston rod is connected to the hold-down ring being threaded with the center hole of piston upper-end surface, the upper end of cylinder with large diameter portion is withstood in the lower end surface of this hold-down ring, the upper-end surface bilateral symmetry of described hold-down ring is furnished with skewed slot, the tangent to periphery direction that is oriented hold-down ring of this skewed slot.
Described hold-down ring is embedded in the step of center hole upper end layout of piston upper-end surface, and the sidewall of this step is furnished with screw thread, and its lower end surface flushes with the upper-end surface of cylinder with large diameter portion.
The inclined-plane true dip direction of the skewed slot of described hold-down ring both sides is contrary.
The upper-end surface of described hold-down ring flushes with the upper-end surface of piston.
In installing, skewed slot can provide a Point of Strength tangentially knocking, and can apply the tangential power of circumference to hold-down ring its rotation is tightened.
beneficial effect
The utility model relates to a kind of oil cylinder piston structure of non-threaded connection, simple in structure, has reduced machining accuracy, has reduced cost, has solved the not high problem of produced coaxality that is threaded.
Brief description of the drawings
Fig. 1 is the structural drawing that partly cuts open of the present utility model;
Fig. 2 is the plan view of hold-down ring described in the utility model;
Fig. 3 is the partial sectional view of hold-down ring described in the utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments are only not used in restriction scope of the present utility model for the utility model is described.In addition should be understood that those skilled in the art can make various changes or modifications the utility model after having read the content of the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
As Figure 1-3, mode of execution of the present utility model relates to a kind of oil cylinder piston structure of non-threaded connection, comprise piston 2 and piston rod 1, the lower end of described piston rod 1 extend in the center hole of piston 2 upper ends, described piston rod 1 lower end is cylinder with large diameter portion 5, on described piston rod 1, be socketed with the hold-down ring 3 being threaded with the center hole of piston 2 upper-end surfaces, the upper end of cylinder with large diameter portion 5 is withstood in the lower end surface of this hold-down ring 3, the upper-end surface bilateral symmetry of described hold-down ring 3 is furnished with skewed slot 6, the tangent to periphery direction that is oriented hold-down ring 3 of this skewed slot 6.
Described hold-down ring 3 is embedded in the step 4 of center hole upper end layout of piston 2 upper-end surfaces, and the sidewall of this step 4 is furnished with screw thread, and its lower end surface flushes with the upper-end surface of cylinder with large diameter portion 5.
The inclined-plane true dip direction of the skewed slot 6 of described hold-down ring 3 both sides is contrary.
The upper-end surface of described hold-down ring 3 flushes with the upper-end surface of piston 2.
In installing, piston rod 1 is extend in the center hole of piston 2 upper-end surfaces, hold-down ring 3 is socketed on piston rod 1, then rotate hold-down ring 3, skewed slot 6 on hold-down ring 3 can provide a Point of Strength tangentially knocking, apply the tangential power of circumference can to hold-down ring 3 its rotation is tightened, until piston rod 1 is fully compressed.
Claims (4)
1. the oil cylinder piston structure of a non-threaded connection, comprise piston (2) and piston rod (1), it is characterized in that, the lower end of described piston rod (1) extend in the center hole of piston (2) upper end, described piston rod (1) lower end is cylinder with large diameter portion (5), on described piston rod (1), be socketed with the hold-down ring (3) being threaded with the center hole of piston (2) upper-end surface, the upper end of cylinder with large diameter portion (5) is withstood in the lower end surface of this hold-down ring (3), the upper-end surface bilateral symmetry of described hold-down ring (3) is furnished with skewed slot (6), the tangent to periphery direction that is oriented hold-down ring (3) of this skewed slot (6).
2. the oil cylinder piston structure of a kind of non-threaded connection according to claim 1, it is characterized in that: described hold-down ring (3) is embedded in the step (4) of center hole upper end layout of piston (2) upper-end surface, the sidewall of this step (4) is furnished with screw thread, and its lower end surface flushes with the upper-end surface of cylinder with large diameter portion (5).
3. the oil cylinder piston structure of a kind of non-threaded connection according to claim 1, is characterized in that: the inclined-plane true dip direction of the skewed slot (6) of described hold-down ring (3) both sides is contrary.
4. the oil cylinder piston structure of a kind of non-threaded connection according to claim 1 and 2, is characterized in that: the upper-end surface of described hold-down ring (3) flushes with the upper-end surface of piston (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320894038.9U CN203686114U (en) | 2013-12-31 | 2013-12-31 | Oil cylinder piston structure in non-threaded connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320894038.9U CN203686114U (en) | 2013-12-31 | 2013-12-31 | Oil cylinder piston structure in non-threaded connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203686114U true CN203686114U (en) | 2014-07-02 |
Family
ID=51008014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320894038.9U Expired - Fee Related CN203686114U (en) | 2013-12-31 | 2013-12-31 | Oil cylinder piston structure in non-threaded connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203686114U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269622A (en) * | 2017-07-31 | 2017-10-20 | 山东万通液压股份有限公司 | Self-adapting type piston rod and piston coupling structure |
-
2013
- 2013-12-31 CN CN201320894038.9U patent/CN203686114U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269622A (en) * | 2017-07-31 | 2017-10-20 | 山东万通液压股份有限公司 | Self-adapting type piston rod and piston coupling structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20171231 |