CN108131214A - A kind of piston coupling structure of variable compression ratio engine - Google Patents
A kind of piston coupling structure of variable compression ratio engine Download PDFInfo
- Publication number
- CN108131214A CN108131214A CN201711386175.0A CN201711386175A CN108131214A CN 108131214 A CN108131214 A CN 108131214A CN 201711386175 A CN201711386175 A CN 201711386175A CN 108131214 A CN108131214 A CN 108131214A
- Authority
- CN
- China
- Prior art keywords
- piston
- transmission parts
- sleeve
- hole
- anticreep
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/0015—Multi-part pistons
- F02F3/0023—Multi-part pistons the parts being bolted or screwed together
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a kind of piston coupling structure of variable compression ratio engine, by being fixedly connected at the top of connector and transmission parts in the middle part of piston, piston base at the top of anti-loose structure and transmission parts by being fixedly connected；Connector includes the sleeve being coaxially fixed in piston and is fixedly and coaxially connected with sleeve, the stud that bottom is stretched into transmission parts and is fixedly connected with transmission parts；Anti-loose structure includes being opened in the anticreep locating slot and anticreep positioning through hole at the top of piston base and transmission parts respectively, is fixedly connected between anticreep locating slot and anticreep positioning through hole by anticreep positioning pin.Piston cavity reduces manufacturing process and reduces cost without independent machining internal thread.The positioning slot structure of piston leg outer surface makes piston simpler in assembling, improves efficiency of assembling.Anti-loose structure at the top of supporting leg bottom and transmission parts has fundamentally prevented the possibility that piston occurs loosening and relatively rotate with transmission parts under various operating conditions.
Description
Technical field
The present invention relates to automotive engine component technical fields, connect in particular to a kind of piston of variable compression ratio engine
Binding structure.
Background technology
The Chinese patent CN102947628 of Wei Yanei Lapies proposes a kind of elasticity of variable compression ratio engine piston
Fastener provides enough elasticity deposits between transmission parts and piston, can be to work while reaching and tensing pretightning force
Plug makees rotary index.Try hard to the risk for solving to collide between risk, piston and valve that piston and transmission parts loosen with
And the risk of engine premature breakdown.But there are still the possibilities loosened under extreme operating condition for this kind of elastic fixing part.Once
Piston is got loose with transmission parts, and the contact surface between piston stabilizer blade and transmission parts top surface is likely to occur separation, causes to live
There is the risk rotated in plug, on the one hand it cannot be guaranteed that the stabilization of variable compression ratio engine compression ratio, on the other hand can cause to live
Collision is generated between plug and variable compression ratio engine valve, this is fatal risk for the engine to run at high speed.
Invention content
Present invention aim to solve the deficiency of above-mentioned background technology, provide it is a kind of it is simple in structure, be easily assembled, keep away
Exempt from the piston coupling structure of the variable compression ratio engine of piston rotation.
In order to achieve this, the piston coupling structure of the variable compression ratio engine designed by the present invention, including piston and
The transmission parts transmitted between piston and crank axle connecting rod into action edge, it is characterised in that：Pass through connection in the middle part of the piston
It is fixedly connected at the top of part and transmission parts, the piston base at the top of anti-loose structure and transmission parts by being fixedly connected；Institute
State connector include the sleeve that is coaxially fixed in piston and be fixedly and coaxially connected with sleeve, bottom is stretched into transmission parts and with
The stud that transmission parts are fixedly connected；The anti-loose structure includes being opened in respectively anti-at the top of piston base and transmission parts
De- locating slot and anticreep positioning through hole are fixed by anticreep positioning pin between the anticreep locating slot and anticreep positioning through hole and connected
It connects.
Specifically, the piston includes piston head, the piston skirt and and piston skirt that are fixedly connected on piston head bottom
The piston supporting leg being fixedly connected, the connector are fixed in piston supporting leg.
More specifically, the piston branch midleg is coaxially provided with sleeve location hole, and the sleeve location hole, which includes being located at, lives
First circular hole portion of plug supporting leg lower part and the second circular hole portion positioned at piston supporting leg top, the aperture of first circular hole portion are more than
The aperture of second circular hole portion is connected with tapering transition hole between the top of first circular hole portion and the bottom of the second circular hole portion
Section；The sleeve includes the first sleeve part coordinated with the first circular hole portion and the second sleeve portion coordinated with the second circular hole portion, institute
State the transition sleeve canister portion for being connected between the top of the first sleeve part and the bottom in second sleeve portion and coordinating with tapering transition hole section.
Preferably, first circular hole portion is mach smooth hole section, and second circular hole portion is blank hole section；It is described
The outer surface of first sleeve part is mach smooth surface, and the outer surface in the second sleeve portion is equipped with screw thread.
Preferably, the top inner wall in the second sleeve portion is fixedly connected with the thread bush canister portion being coaxial therewith, the spiral shell
The top of column is screwed with thread bush canister portion and connect.
Further, threaded hole is provided at the top of the transmission parts, the stud bottom passes through sleeve connection in threaded hole
It is interior.
Further, the bottom of the piston supporting leg is provided with and aperture coaxial with the first circular hole portion more than the first circular hole sector hole
The transmission parts location hole of diameter, the transmission parts top are equipped with the positioning convex platform coordinated with transmission parts location hole.
Preferably, the anticreep positioning pin is elastic component；The anticreep positioning through hole is stepped hole, including first through hole
Section and the top coaxial communication of bottom and first through hole section, aperture are more than the second through hole section of first through hole section；The anticreep is determined
The both ends of position pin are taper type structure, and the aperture of the first through hole section is more than the most narrow place aperture of anticreep positioning pin and less than anti-
De- positioning pin the widest part diameter, the aperture of second through hole section and the aperture of anticreep locating slot with anticreep positioning pin the widest part
Diameter it is identical.
Preferably, the stud is elastic component.
Preferably, the depth bounds of the anticreep locating slot be 2mm~4mm, the depth model of the transmission parts location hole
It encloses for 2mm~4mm.
The beneficial effects of the invention are as follows：Sleeve is fastened by its design shape and external screw thread with the cooperation of sleeve location hole, living
Inner cavity is filled in without independent machining internal thread, is reduced manufacturing process and is reduced cost.The locating slot knot of piston leg outer surface
Structure makes piston simpler in assembling, improves efficiency of assembling.Anti-loose structure at the top of supporting leg bottom and transmission parts from
Fundamentally prevent the possibility that piston occurs loosening and relatively rotate with transmission parts under various operating conditions, ensure that piston
Firm and reliable connection between transmission parts.
Description of the drawings
Fig. 1 is the front view of piston coupling structure in the present invention；
Fig. 2 is the sectional view of A-A in Fig. 1；
Fig. 3 is the sectional view of anti-loose structure in the present invention；
Fig. 4 is the sectional view of anticreep positioning through hole and anticreep locating slot in the present invention；
Wherein, 1-piston (1.1-piston head, 1.2-piston skirt, 1.3-piston supporting leg), 2-transmission parts, 3-
Sleeve (the 3.1-the first sleeve part, 3.2-transition sleeve canister portion, 3.3-second sleeve portion, 3.4-thread bush canister portion), 4-spiral shell
Column, 5-anticreep positioning pin, 6-anticreep locating slot, 7-anticreep positioning through hole (7.1-first through hole section, the 7.2-the second through-hole
Section), the 8-the first circular hole portion, 9-tapering transition hole section, the 10-the second circular hole portion, 11-transmission parts location hole, 12-positioning
Boss, 13-assembling locating slot, 14-threaded hole.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
The piston coupling structure of variable compression ratio engine as shown in Fig. 1-2, including piston 1 and in piston 1 and crank
The transmission parts 2 (identical with the transmission parts mentioned in Patent No. CN102947628) transmitted between axis connecting rod into action edge,
1 middle part of piston is fixedly connected by connector with 2 top of transmission parts, and 1 bottom of piston passes through anti-loose structure and transmission parts 2
Top is fixedly connected.
As shown in Fig. 2, piston 1 include piston head 1.1, be fixedly connected on 1.1 bottom of piston head piston skirt 1.2 and with
The piston supporting leg 1.3 that piston skirt 1.2 is fixedly connected, connector are fixed in piston supporting leg 1.3.Connector includes coaxial fixed
In the sleeve 3 in piston 1 and be fixedly and coaxially connected with sleeve 3, bottom is stretched into transmission parts 2 and is fixed with transmission parts 2 and connected
The stud 4 connect.1.3 middle part of piston supporting leg is coaxially provided with sleeve location hole, and sleeve location hole includes being located at 1.3 lower part of piston supporting leg
The first circular hole portion 8 and the second circular hole portion 10 positioned at 1.3 top of piston supporting leg, the aperture of the first circular hole portion 8 be more than the second circle
Tapering transition hole section 9 is connected between the bottom of the aperture of hole section 10, the top of the first circular hole portion 8 and the second circular hole portion 10；Set
Cylinder 3 includes the first sleeve part 3.1 coordinated with the first circular hole portion 8 and the second sleeve portion 3.3 coordinated with the second circular hole portion 10, the
The transition sleeve coordinated with tapering transition hole section 9 is connected between the top of one sleeve part 3.1 and the bottom in second sleeve portion 3.3
Portion 3.2.First circular hole portion 8 is mach smooth hole section, and the second circular hole portion 10 is blank hole section；Outside first sleeve part 3.1
Surface is mach smooth surface, and the outer surface in second sleeve portion 3.3 is equipped with screw thread.In the top in second sleeve portion 3.3
Wall is fixedly connected with the thread bush canister portion 3.4 being coaxial therewith, and the top of stud 4 is screwed with thread bush canister portion 3.4 to be connect.It passes
2 top of dynamic component is provided with threaded hole 14, and 4 bottom of stud is connected to across sleeve 3 in threaded hole 14.The bottom of piston supporting leg 1.3
It is provided with and is pushed up with transmission parts location hole 11 of the 8 coaxial and aperture of the first circular hole portion more than 8 aperture of the first circular hole portion, transmission parts 2
Portion is equipped with the positioning convex platform 12 coordinated with transmission parts location hole 11.The depth of transmission parts location hole 11 (both ensures to live for 3mm
The reliability that plug 1 is positioned and connect with transmission parts 2, also reduces the influence for 1 structural strength of piston as far as possible).Piston
Some black skin is set in the inner cavity of supporting leg 1.3, when piston 1 is connect with transmission parts 2, by having the spiral shell of certain elasticity
Column 4 connects.Sleeve 3 is connect by way of thread tapping with piston 1；Certain depth is processed at 1.3 lumen inlet of piston supporting leg
Smooth hole section, between piston 1 position and be oriented to accurate to ensure sleeve 3 before tapping.
As shown in Fig. 3-4, the anticreep that anti-loose structure includes being opened in 2 top of 1 bottom of piston and transmission parts respectively is determined
Position slot 6 and anticreep positioning through hole 7, are fixedly connected between anticreep locating slot 6 and anticreep positioning through hole 7 by anticreep positioning pin 5.It is anti-
De- positioning pin 5 is elastic component；Anticreep positioning through hole 7 is stepped hole, including first through hole section 7.1 and bottom and first through hole section
7.1 top coaxial communication, aperture are more than the second through hole section 7.2 of first through hole section 7.1；The both ends of anticreep positioning pin 5 are
Taper type structure, the aperture of first through hole section 7.1 are straight between the most narrow place aperture of anticreep positioning pin 5 and 5 the widest part of anticreep positioning pin
Between diameter, the aperture of the second through hole section 7.2 and the aperture of anticreep locating slot 6 are identical with the diameter of 5 the widest part of anticreep positioning pin.
Stud 4 is elastic component.For 3mm, (anticreep positioning pin 5 is subjected to certain shearing force, the anticreep positioning to the depth of anticreep locating slot 6
6 depth of slot is preferably 3mm, and 5 diameter of anticreep positioning pin is preferably 3mm).After piston 1 is tightened with transmission parts 2 by stud 4, lead to
The anticreep positioning pin 5 that tight condition is inserted into the anticreep positioning through hole 7 at 2 top of transmission parts is crossed, anticreep positioning pin 5, which is inserted into, lives
It can automatically spring open after filling in the anticreep locating slot 6 of supporting leg 1.3, be formed by first through hole section 7.1 and 7.2 junction of the second through hole section
Shoulder structure prevent anticreep positioning pin 5 from dropping out.
As shown in Fig. 2, in 1.3 side process and assemble locating slot 13 of piston supporting leg, according to pre-designed rotation during assembling
Gyration, and the corresponding position of the assembly tooling in transmission parts 2 sets telltale mark in advance, ensures that stud 4 is twisted in assembling
Assembling locating slot 13 on next piston 1 is aligned with the telltale mark on 2 clamping tool of transmission parts, ensures piston 1 and transmission
Component 2 it is circumferentially positioned accurate.
The above described is only a preferred embodiment of the present invention, not the structure of the present invention is done in any form
Limitation.Any simple modification, equivalent change and modification that every technical spirit according to the present invention makees above example,
In the range of still falling within technical scheme of the present invention.
Claims (10)
1. a kind of piston coupling structure of variable compression ratio engine, including piston (1) and piston (1) and crank axle connecting rod it
Between into action edge transmit transmission parts (2), it is characterised in that：Pass through connector and transmission parts (2) in the middle part of the piston (1)
Top is fixedly connected, and piston (1) bottom at the top of anti-loose structure and transmission parts (2) by being fixedly connected；The connection
Part include the coaxial sleeve (3) being fixed in piston (1) and be fixedly and coaxially connected with sleeve (3), transmission parts (2) are stretched into bottom
Stud (4) that is interior and being fixedly connected with transmission parts (2)；The anti-loose structure include be opened in respectively piston (1) bottom and
Anticreep locating slot (6) and anticreep positioning through hole (7) at the top of transmission parts (2), the anticreep locating slot (6) and anticreep positioning are logical
It is fixedly connected between hole (7) by anticreep positioning pin (5).
2. a kind of piston coupling structure of variable compression ratio engine as described in claim 1, it is characterised in that：The piston
(1) including piston head (1.1), be fixedly connected on piston head (1.1) bottom piston skirt (1.2) and with piston skirt (1.2)
The piston supporting leg (1.3) being fixedly connected, the connector are fixed in piston supporting leg (1.3).
3. a kind of piston coupling structure of variable compression ratio engine as claimed in claim 2, it is characterised in that：The piston
Sleeve location hole is coaxially provided in the middle part of supporting leg (1.3), the sleeve location hole includes first positioned at piston supporting leg (1.3) lower part
Circular hole portion (8) and the second circular hole portion (10) positioned at piston supporting leg (1.3) top, the aperture of first circular hole portion (8) are more than
The aperture of second circular hole portion (10) is connected between the top of first circular hole portion (8) and the bottom of the second circular hole portion (10)
Tapering transition hole section (9)；The sleeve (3) including the first sleeve part (3.1) for coordinating with the first circular hole portion (8) and with the second circle
The second sleeve portion (3.3) of hole section (10) cooperation, the top of first sleeve part (3.1) and the bottom in second sleeve portion (3.3)
The transition sleeve canister portion (3.2) coordinated with tapering transition hole section (9) is connected between portion.
4. a kind of piston coupling structure of variable compression ratio engine as claimed in claim 3, it is characterised in that：Described first
Circular hole portion (8) is mach smooth hole section, and second circular hole portion (10) is blank hole section；First sleeve part (3.1)
Outer surface for mach smooth surface, the outer surface of the second sleeve portion (3.3) is equipped with screw thread.
5. a kind of piston coupling structure of variable compression ratio engine as claimed in claim 3, it is characterised in that：Described second
The top inner wall of sleeve part (3.3) is fixedly connected with the thread bush canister portion (3.4) being coaxial therewith, the top of the stud (4) with
Thread bush canister portion (3.4) is screwed connection.
6. a kind of piston coupling structure of variable compression ratio engine as described in claim 1 or 5, it is characterised in that：It is described
Threaded hole (14) is provided at the top of transmission parts (2), stud (4) bottom is connected to across sleeve (3) in threaded hole (14).
7. a kind of piston coupling structure of variable compression ratio engine as claimed in claim 3, it is characterised in that：The piston
The bottom of supporting leg (1.3) is provided with and aperture coaxial with the first circular hole portion (8) and determines more than the transmission parts in the first circular hole portion (8) aperture
Position hole (11), transmission parts (2) top are equipped with the positioning convex platform (12) coordinated with transmission parts location hole (11).
8. a kind of piston coupling structure of variable compression ratio engine as described in claim 1, it is characterised in that：The anticreep
Positioning pin (5) is elastic component；The anticreep positioning through hole (7) is stepped hole, includes first through hole section (7.1) and bottom and the
The top coaxial communication of one through hole section (7.1), aperture are more than the second through hole section (7.2) of first through hole section (7.1)；The anticreep
The both ends of positioning pin (5) are taper type structure, and the aperture of the first through hole section (7.1) is most narrow more than anticreep positioning pin (5)
Locate aperture and less than anticreep positioning pin (5) the widest part diameter, the aperture of second through hole section (7.2) and anticreep locating slot (6)
Aperture it is identical with the diameter of anticreep positioning pin (5) the widest part.
9. a kind of piston coupling structure of variable compression ratio engine as described in claim 1, it is characterised in that：The stud
(4) it is elastic component.
10. a kind of piston coupling structure of variable compression ratio engine as claimed in claim 7, it is characterised in that：It is described anti-
The depth bounds of de- locating slot (6) are 2mm~4mm, and the depth bounds of the transmission parts location hole (11) are 2mm~4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711386175.0A CN108131214B (en) | 2017-12-20 | 2017-12-20 | A kind of piston coupling structure of variable compression ratio engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711386175.0A CN108131214B (en) | 2017-12-20 | 2017-12-20 | A kind of piston coupling structure of variable compression ratio engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108131214A true CN108131214A (en) | 2018-06-08 |
| CN108131214B CN108131214B (en) | 2019-11-05 |
Family
ID=62390905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711386175.0A Active CN108131214B (en) | 2017-12-20 | 2017-12-20 | A kind of piston coupling structure of variable compression ratio engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108131214B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5247911A (en) * | 1991-10-23 | 1993-09-28 | Vratislav Nenicka | Compression ratio control in gasoline engines |
| WO1994019589A1 (en) * | 1993-02-23 | 1994-09-01 | Un Kil Paek | A power output boosting engine piston |
| CN104454223A (en) * | 2013-09-18 | 2015-03-25 | 马自达汽车株式会社 | Piston structure for engine |
| CN105508046A (en) * | 2016-01-20 | 2016-04-20 | 吉林大学 | Piston with variable compression ratio |
| US9470311B2 (en) * | 2012-06-14 | 2016-10-18 | Mahle International Gmbh | Lightweight engine power cell assembly |
-
2017
- 2017-12-20 CN CN201711386175.0A patent/CN108131214B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5247911A (en) * | 1991-10-23 | 1993-09-28 | Vratislav Nenicka | Compression ratio control in gasoline engines |
| WO1994019589A1 (en) * | 1993-02-23 | 1994-09-01 | Un Kil Paek | A power output boosting engine piston |
| US9470311B2 (en) * | 2012-06-14 | 2016-10-18 | Mahle International Gmbh | Lightweight engine power cell assembly |
| CN104454223A (en) * | 2013-09-18 | 2015-03-25 | 马自达汽车株式会社 | Piston structure for engine |
| CN105508046A (en) * | 2016-01-20 | 2016-04-20 | 吉林大学 | Piston with variable compression ratio |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108131214B (en) | 2019-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2015136396A (en) | SYRINGE | |
| JP7168508B2 (en) | A device for adjusting the height of the pieces | |
| DE102009005390A1 (en) | Axial piston machine in bent axis design | |
| CN205453393U (en) | Connection structure of motor shaft and derailleur axle | |
| CN108131214A (en) | A kind of piston coupling structure of variable compression ratio engine | |
| CN109964052A (en) | Adjust bolt | |
| DE102015213278A1 (en) | Device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine | |
| CN107588084A (en) | A kind of anti-loosening bolt assembly easily assembled | |
| CN108884914A (en) | Chain tensioning device | |
| CN105465750A (en) | Lamp cap free from riveting and manufacturing method thereof | |
| JP6672598B2 (en) | Spool switching valve device | |
| CN106573534A (en) | Fuel tank check valve | |
| CN104176122A (en) | Automobile pull rod assembly | |
| CN203717593U (en) | Anti-loose and anti-slip screwing assembly and bolt and nut thereof | |
| CN108644218A (en) | A kind of locked connector | |
| US20150010375A1 (en) | Self-tapping screw | |
| CN108023200A (en) | A kind of micro- spring socket electrical contact component | |
| CN202901784U (en) | Rotary barrier-free grease filling nozzle | |
| CN106051279A (en) | Square piston oil cylinder system with valve needle positioning function | |
| CN208900915U (en) | Improved quick coupling structure | |
| CN207554773U (en) | Gear shift operation mechanism | |
| DE102019117463A1 (en) | Connecting rod for an internal combustion engine with variable compression and method for producing a connecting rod | |
| DE102012023367B4 (en) | Internal combustion engine with a cylinder head and a spark plug | |
| CN108591226A (en) | A kind of new mechanical lock curable type nut connection anti-loose structure | |
| CN210912742U (en) | Folding positioning locking handle seat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |