CN203035367U - Piston of engine cylinder and engine cylinder using piston - Google Patents
Piston of engine cylinder and engine cylinder using piston Download PDFInfo
- Publication number
- CN203035367U CN203035367U CN 201220694530 CN201220694530U CN203035367U CN 203035367 U CN203035367 U CN 203035367U CN 201220694530 CN201220694530 CN 201220694530 CN 201220694530 U CN201220694530 U CN 201220694530U CN 203035367 U CN203035367 U CN 203035367U
- Authority
- CN
- China
- Prior art keywords
- piston
- piston pin
- wall portion
- cylindrical wall
- pin hole
- 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
Links
Images
Abstract
The utility model provides a piston of an engine cylinder and the engine cylinder using the piston. The length of an axial direction of a hole wall of the upper half portion of the piston is larger than that of a hole wall of the lower half portion of the piston so as to accordingly form a special-shaped pin hole and ensure that when being used, the piston is evenly stressed; and because the area of a hole wall of a half portion is reduced, the weight of the piston is reduced, inertia loss is reduced and performance of an engine is improved. In addition, a decompression groove is additionally placed on a second ring rim of the piston, and sealing performance of the end surface of a first air ring is improved so as to accordingly ensure that air tightness of the first air ring is better. Two machining oil holes used by the prior piston are replaced by an oil drainage cavity formed through casting to form an oil path so as to lubricate the piston, and the structure of the special-shaped pin hole is combined so as to homogenize stressed conditions of the pin hole of the piston, machining cost is saved and lubrication of a piston pin is also improved.
Description
Technical field
The utility model relates to the piston technology, particularly the piston of engine cylinder and use the cylinder of this piston.
Background technique
The piston of available engine cylinder as depicted in figs. 1 and 2, this piston comprises piston only 1, the side face that the top of piston only 1 has end face portion 1a, piston only 1 has the 1b of cylindrical wall portion, the 1b of the cylindrical wall portion encirclement of the end face portion 1a at top and side face is formed on piston only 1 bottom to have the piston cavity 2(of opening or is referred to as home record), this piston cavity 2 is used for inserting piston rod, and:
The outer surface of the 1b of cylindrical wall portion of piston only 1 side face is formed with some ring banks 3 in the position of the end face portion 1a at close top;
The 1b of cylindrical wall portion of piston only 1 side face offers corresponding piston pin hole 5 being formed with near the position of piston only 1 bottom in two piston pin bosses 4, each piston pin boss 4, each piston pin hole 5 is in the extension in the radial direction of side face and run through the 1b of cylindrical wall portion and be communicated with piston cavity 2; And the piston pin hole 5 that is opened in two piston pin bosses 4 respectively is oppositely arranged along the radial direction of side face; Wrist pin is inserted into piston pin hole 5 and stretches in the piston cavity 2 by piston pin hole 5, the piston rods that can utilize wrist pin will be inserted in the piston cavity 2 are fixed;
The outer surface of the 1b of cylindrical wall portion of piston only 1 side face also is formed with oil ring groove 6 between one of the most close piston pin boss 4 ring bank 3 and piston pin boss 4, the hole wall that oil ring groove 6 offers an oilhole 7a, piston pin hole 5 offers oilhole 7b, and this oilhole 7a is communicated with the lubricating oil path that forms piston pin hole 5 with oilhole 7b, to realize lubricating piston pin hole 5.
Though aforesaid existing piston can be realized the proper functioning of motor by the feed movement in cylinder,, but there are the following problems:
One, when piston is done feed movement, be inserted in wrist pins in the piston pin hole 5 and can be subjected to lighting pressure and inertial force, and producing the crooked deformation of arching upward to the end face portion 1a at the top of piston only 1 of DYNAMIC DISTRIBUTION, meanwhile, piston only 1 also can deformation under thermal distortion and huge pressure of explosion percussion and is caused piston pin hole 5 to produce the crooked deformation of arching upward to piston only 1 bottom; Therefore, wrist pin will be to piston pin hole 5 near the first half hole wall 5a generation huge impact power of top 1a and to the Lower Half 5b generation less impact force of piston pin hole 5 near piston only 1 bottoms, that is, the hole wall unbalance stress of piston pin hole 5, its first half hole wall 5a are main stress surface; But the Lower Half hole wall 5b of the piston pin hole 5 of existing piston is identical with the area of first half hole wall 5a, thereby fails to adapt to effectively the situation of unbalance stress;
They are two years old, as mentioned above, the area of the Lower Half hole wall 5b of the piston pin hole 5 of existing piston is set to identical with the area of first half hole wall 5a, therefore, has the area that is enough to carry impact force if satisfy first half hole wall 5a, then can increase the area of Lower Half hole wall 5b meaninglessly, increase piston weight so meaninglessly and then increased the inertial force loss;
Its three, some ring banks 3 of existing piston can contacts with the inwall of cylinder, thereby cause the gas pressure in the cylinder excessive, influence is installed in the compression ring sealability of encircling between bank, thereby is unfavorable for the tightness of piston;
Its four, existing piston need can form by oilhole 7a by machining and be communicated with the lubricating oil path that forms with oilhole 7b, thereby has increased the processing cost of piston.
The model utility content
In view of the problem of existing piston structure, the utility model provides a kind of piston of cylinder, comprises piston only, and the side face that the top of described piston only has end face portion, described piston only has cylindrical wall portion;
Described end face portion and described cylindrical wall portion surround and form piston cavity, and described piston cavity has opening in the bottom of piston only;
Described cylindrical wall portion is formed with piston pin boss in the position near described bottom, offers piston pin hole in the described piston pin boss, and described piston pin hole is in the extension in the radial direction of described side face and run through described cylindrical wall portion and be communicated with described piston cavity;
Wherein, described piston pin hole has the Lower Half hole wall near the first half hole wall at described top and close described bottom, and the length of described first half hole wall on the bearing of trend of described piston pin hole is greater than described Lower Half hole wall.
Optionally, described piston cavity is cylindric in the position near described top, is taper in the position near described bottom;
Wherein, described taper is identical with described columned diameter towards the diameter of an end at described top, described taper towards the diameter of the other end of described bottom greater than described columned diameter.
Optionally, the outer surface of described cylindrical wall portion is provided with at least two ring banks in the position near described top, and at least two described ring banks are arranged between described end face portion and the described piston pin boss in proper order along the axial direction of described side face;
Wherein, except a described ring bank at the most close described top, at least one remaining described ring bank offers decompressing groove.
Optionally, described ring bank is three, and a described ring bank that is arranged in the neutral position is provided with described decompressing groove.
Optionally, the outer surface of described cylindrical wall portion forms oil ring groove between a described ring bank of the most close described piston pin boss and described piston pin boss;
And the outer surface of described cylindrical wall portion also is formed with the draining chamber, and described draining chamber extends to described piston pin hole at the opening surface place of the outer surface of described cylindrical wall portion from described oil ring groove.
The utility model also provides a kind of cylinder, comprises cylinder, and aforesaid piston.
Adopt piston of the present utility model to have the following advantages:
One, because the length on the first half hole wall axial direction of piston pin hole is greater than the Lower Half hole wall, to form special pinhole, thereby make that the area of the first half hole wall bear greater impact power is big relatively, the area of Lower Half hole wall that bears less impact force is relatively little, and then improves the problem of the hole wall discontinuity of piston pin hole;
Its two owing to reduced the area of Lower Half hole wall, thereby can enlarge piston cavity by the position at the Lower Half hole wall and increase the hollow parts of piston, and then make the overall weight of piston alleviate, reduced the inertial force loss;
Its three, set up decompressing groove at the non-top land of piston, make that the tightness be installed in the compression ring between the ring bank is better, end face seal improves;
Its four, substitute existing two machining oilhole oil circuits wrist pin be lubricated by casting the draining chamber that forms, and in conjunction with the structure of special pinhole, saved processing cost, and improved the lubricated of wrist pin.
Description of drawings
Fig. 1 is existing structure of piston schematic representation;
Fig. 2 is the generalized section of A-A direction among Fig. 1;
Fig. 3 is structure of piston schematic representation in the utility model;
Fig. 4 is the generalized section of B-B direction among Fig. 3.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used for explaining the utility model, is not for limiting scope of the present utility model.
A kind of embodiment's of the utility model piston structure as shown in Figure 3 main schematic representation, as shown in Figure 3, piston comprises piston only 11, and the top of piston only 11 has end face portion 11a, and the side face of piston only 11 has the 11b of cylindrical wall portion; The 11b of cylindrical wall portion of the end face portion 11a at top and side face surrounds and is formed on the piston cavity 12 that piston only 11 bottoms have opening, and piston cavity 12 is used for inserting piston rod;
The 11b of cylindrical wall portion is formed with piston pin boss 13 in the position of the bottom of close piston only 11, offer piston pin hole 14 in the piston pin boss 13, piston pin hole 14 is in the extension in the radial direction of side face and run through the 11b of cylindrical wall portion and be communicated with piston cavity 12, wrist pin is inserted in the piston pin hole 14, and the piston rod that can utilize wrist pin will insert in the piston cavity 12 is fixed;
As a kind of typical structure, in this enforcement, the outer surface of the 11b of cylindrical wall portion of side face is being provided with three ring bank 15a ~ 15c near the position at top, and three ring bank 15a ~ 15c are arranged between the end face portion 11a and piston pin boss 13 at top in proper order along the axial direction of side face; And 15b offers decompressing groove 16 at second ring bank, therefore, can improve the end face seal performance that is installed in the top compression ring (not shown) between top land 15a and the second ring bank 15b, thereby improve the first compression ring tightness.
In addition, in other enforceable structures, the number of ring bank can be more than or equal to 2, owing to install compression ring between each ring bank, so except the ring bank of the end face portion 11a at close top, remaining, at least one ring offers decompressing groove on the bank, all can improve the sealability of piston.
In the present embodiment, the outer surface of the 11b of cylindrical wall portion encircles at the 3rd of the most close piston pin boss 13 and forms oil ring groove 17 between bank 15c and the piston pin boss 13, and, the outer surface of the 11b of cylindrical wall portion also is formed with draining chamber 18, draining chamber 18 extends to piston pin hole 14 at the opening surface place of the outer surface of the 11b of cylindrical wall portion from oil ring groove 17, to realize lubricating piston pin hole 14.
Further as shown in Figure 4, piston pin hole 14 has the first half hole wall 15a at close top and the Lower Half hole wall 14b of close piston only 11 bottoms, and the length of first half hole wall 14a on the bearing of trend of piston pin hole 14 is greater than Lower Half hole wall 14b;
Structure by present embodiment, because the length of the first half hole wall of piston pin hole is greater than the Lower Half hole wall, to form special pinhole, thereby make that the area of the first half hole wall bear greater impact power is big relatively, the area of Lower Half hole wall that bears less impact force is relatively little, and then improves the problem of the hole wall discontinuity of piston pin hole;
And, owing to reduced the area of Lower Half hole wall, thereby can enlarge piston cavity by the position at the Lower Half hole wall and increase the hollow parts of piston, and then make the overall weight of piston alleviate, reduced the inertial force loss;
Moreover, set up decompressing groove on the bank at second ring of piston, make that the top compression ring tightness that is installed in top land and the second ring bank is better, end face seal improves;
Further, substitute existing two machining oilhole oil circuits wrist pin is lubricated by casting the draining chamber that forms, and in conjunction with the structure of special pinhole, saved processing cost, and improved the lubricated of wrist pin.
The utility model also provides a kind of motor car engine cylinder, comprises above-mentioned piston structure and cylinder barrel.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, not all within spirit of the present utility model and principle, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (6)
1. the piston of a cylinder comprises piston only, and the side face that the top of described piston only has end face portion, described piston only has cylindrical wall portion;
Described end face portion and described cylindrical wall portion surround and form piston cavity, and described piston cavity has opening in the bottom of piston only;
Described cylindrical wall portion is formed with piston pin boss in the position near described bottom, offers piston pin hole in the described piston pin boss, and described piston pin hole is in the extension in the radial direction of described side face and run through described cylindrical wall portion and be communicated with described piston cavity;
It is characterized in that described piston pin hole has the Lower Half hole wall near the first half hole wall at described top and close described bottom, and the length of described first half hole wall on the bearing of trend of described piston pin hole is greater than described Lower Half hole wall.
2. piston according to claim 1 is characterized in that, described piston cavity is cylindric in the position near described top, is taper in the position near described bottom;
Wherein, described taper is identical with described columned diameter towards the diameter of an end at described top, described taper towards the diameter of the other end of described bottom greater than described columned diameter.
3. piston according to claim 1, it is characterized in that, the outer surface of described cylindrical wall portion is provided with at least two ring banks in the position near described top, and at least two described ring banks are arranged between described end face portion and the described piston pin boss in proper order along the axial direction of described side face;
Wherein, except a described ring bank at the most close described top, at least one remaining described ring bank offers decompressing groove.
4. piston according to claim 3 is characterized in that, described ring bank is three, and a described ring bank that is arranged in the neutral position is provided with described decompressing groove.
5. according to claim 3 or 4 described pistons, it is characterized in that,
The outer surface of described cylindrical wall portion forms oil ring groove between a described ring bank of the most close described piston pin boss and described piston pin boss;
And the outer surface of described cylindrical wall portion also is formed with the draining chamber, and described draining chamber extends to described piston pin hole at the opening surface place of the outer surface of described cylindrical wall portion from described oil ring groove.
6. a cylinder comprises cylinder, it is characterized in that, also comprises as each described piston of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220694530 CN203035367U (en) | 2012-12-17 | 2012-12-17 | Piston of engine cylinder and engine cylinder using piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220694530 CN203035367U (en) | 2012-12-17 | 2012-12-17 | Piston of engine cylinder and engine cylinder using piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035367U true CN203035367U (en) | 2013-07-03 |
Family
ID=48687499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220694530 Expired - Fee Related CN203035367U (en) | 2012-12-17 | 2012-12-17 | Piston of engine cylinder and engine cylinder using piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035367U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677916A (en) * | 2017-02-16 | 2017-05-17 | 无锡华源凯马发动机有限公司 | Low-emission non-road single-cylinder diesel engine piston structure |
| CN111140397A (en) * | 2019-12-24 | 2020-05-12 | 潍柴动力股份有限公司 | Engine piston and engine |
-
2012
- 2012-12-17 CN CN 201220694530 patent/CN203035367U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677916A (en) * | 2017-02-16 | 2017-05-17 | 无锡华源凯马发动机有限公司 | Low-emission non-road single-cylinder diesel engine piston structure |
| CN111140397A (en) * | 2019-12-24 | 2020-05-12 | 潍柴动力股份有限公司 | Engine piston and engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203035367U (en) | Piston of engine cylinder and engine cylinder using piston | |
| CN109630056B (en) | Dynamic seal structure of mandrel of jar and jar based on dynamic seal structure | |
| CN103920913A (en) | Technological cylinder cover for machining cylinder holes of engine cylinder body and machining method therefor | |
| CN201412473Y (en) | Strong-force quick response damper | |
| CN103437973B (en) | Vertical star-like high-pressure air compressor | |
| CN107654481A (en) | A kind of crank-shaft link neck oil pocket sealing structure | |
| CN201687688U (en) | Oilless packing assembly of piston type compressor | |
| CN102412651B (en) | Oil seal structure used in high speed motor | |
| CN102359675A (en) | Novel seal joint | |
| CN103696869B (en) | Rolling friction built-up piston | |
| CN215409920U (en) | Integrated two-stage pressure hydraulic air spring | |
| CN202178649U (en) | Oil seal structure for high-speed motor | |
| CN207049110U (en) | Spacer type hydraulic synchronous oil cylinder | |
| CN204512060U (en) | Two-in-one Composite Double is to sealing suit | |
| CN203796609U (en) | Sealing component for pump | |
| CN107237730A (en) | A kind of inverted Y-shaped oil-free gas compressor | |
| CN202381282U (en) | Grading compressor | |
| CN2376548Y (en) | Compressor for natural gas station | |
| CN206509036U (en) | Single-Cylinder Hydraulic Cone Crusher hydraulic cylinder | |
| CN106930855A (en) | A kind of piston | |
| CN2837863Y (en) | Reinforced sealing device of controllable epicenter vibrator | |
| CN205714664U (en) | A kind of full-oil-free lubrication sealing type piston structure | |
| CN2856456Y (en) | Engine piston having dual-ring multiple oil discharging holes structure | |
| CN207297188U (en) | Internal combustion engine | |
| CN204003929U (en) | A kind of connecting rod small end of engine structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180515 Address after: 570216 Jinniu Road No. 2-8, Jinpan Industrial Development Zone, Haikou, Hainan Patentee after: Haima Autocars Co., Ltd., No. Autocar Manufacture Plant Address before: 570216 Jin pan Industrial Development Zone, Haikou, Hainan Patentee before: FAW Haima Power Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20201217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |