CN211819691U - Cast aluminum piston based on expansion assembly - Google Patents
Cast aluminum piston based on expansion assembly Download PDFInfo
- Publication number
- CN211819691U CN211819691U CN202020167147.0U CN202020167147U CN211819691U CN 211819691 U CN211819691 U CN 211819691U CN 202020167147 U CN202020167147 U CN 202020167147U CN 211819691 U CN211819691 U CN 211819691U
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- piston
- expansion
- arc
- pull rod
- base body
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Abstract
The utility model discloses a cast aluminium piston based on expansion assembly, include: piston base member and prevent subassembly that expands, prevent that the subassembly that expands includes: the anti-expansion piston comprises a cross pull rod and 4 arc anti-expansion pieces, wherein a cavity is formed in a piston base body, pin hole seats extending into the cavity are symmetrically arranged on the lower portion of the piston base body, the 4 arc anti-expansion pieces are evenly distributed in the inner wall of the piston base body, the cross pull rod is horizontally arranged in the cavity of the piston base body, 4 end portions of the cross pull rod respectively extend into the inner wall of the piston base body and are connected with the 4 arc anti-expansion pieces, the arc anti-expansion pieces and the cross pull rod are located above the pin hole seats, and the top surfaces and the bottom surfaces of the arc anti-expansion pieces are provided with concave structures. In this way, the utility model provides a cast aluminium piston based on expansion assembly prevents the setting of bloated piece and cross pull rod through the arc, and the cross pull rod prevents the bloated piece to the arc and draws admittedly, has promoted the suppression effect to piston side wall thermal energy greatly.
Description
Technical Field
The utility model relates to a piston technical field especially relates to a cast aluminium piston based on expansion assembly.
Background
The automobile piston is better than the center part of an automobile engine and is used for bearing gas pressure, a connecting rod is driven by a piston pin to drive a crankshaft to rotate, and the top of the piston is also a component of a combustion chamber, so that the automobile piston occupies an extremely important position when the engine runs.
The aluminum alloy piston is light in weight and beneficial to reducing the energy consumption of an engine, but the aluminum alloy piston has a high thermal expansion coefficient, is easy to expand under a high-temperature environment to accelerate abrasion, and reduces the service life of the engine. Part aluminum alloy piston resists the heat altered shape through burying the expander ring of preventing, but the simple structure of ordinary expander ring of preventing, and the effect of preventing expanding is relatively poor with the combination effect of piston, and it is limited to prevent the expansion effect, needs the improvement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a cast aluminium piston based on expansion assembly to solve the problem that proposes in the background art.
In order to solve the technical problem, the utility model discloses a technical scheme be: there is provided a cast aluminium piston based on an expansion assembly comprising: piston base member and prevent subassembly that expands, prevent that the subassembly that expands includes: the anti-expansion piston comprises a cross pull rod and 4 arc anti-expansion pieces, wherein a cavity is formed in a piston base body, pin hole seats extending into the cavity are symmetrically arranged on the lower portion of the piston base body, the 4 arc anti-expansion pieces are evenly distributed in the inner wall of the piston base body, the cross pull rod is horizontally arranged in the cavity of the piston base body, 4 end portions of the cross pull rod respectively extend into the inner wall of the piston base body and are connected with the 4 arc anti-expansion pieces, the arc anti-expansion pieces and the cross pull rod are located above the pin hole seats, and the top surfaces and the bottom surfaces of the arc anti-expansion pieces are provided with concave structures.
In a preferred embodiment of the present invention, the concave structure is a rectangular groove, and the top surface and the bottom surface of the arc-shaped anti-expansion sheet are both provided with at least 3 rectangular grooves.
In a preferred embodiment of the present invention, the concave structure is a triangular groove, and the top surface and the bottom surface of the arc-shaped anti-expansion sheet are provided with at least 3 triangular grooves.
In a preferred embodiment of the present invention, the 4 ends of the cross-shaped tie bar and the 4 arc-shaped anti-expansion pieces are fixed by welding.
In a preferred embodiment of the present invention, a pin shaft mounting hole is provided in the pin shaft seat, and a snap spring mounting groove is provided in the pin shaft mounting hole.
In a preferred embodiment of the present invention, the piston base and the pin hole seat are an integrated cast aluminum structure.
In a preferred embodiment of the present invention, the piston base body is provided with a gas ring groove and an oil ring groove on the outer circumference, and the gas ring groove is located above the oil ring groove.
In a preferred embodiment of the present invention, a plurality of annular heat dissipating fins are disposed on the cross rod at intervals.
The utility model has the advantages that: the utility model provides a cast aluminium piston based on expansion assembly prevents the setting of bloated piece and cross pull rod through the arc, and the cross pull rod prevents to expand the piece to the arc and draws admittedly, has promoted the suppression effect to piston side wall thermal energy greatly, and further top surface and the low side that prevent the piece that expands through at the arc set up the indent structure, strengthen the arc and prevent the combination effect of bloated piece and piston base member.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic structural view of an embodiment 1 of a cast aluminum piston according to the present invention based on an expansion assembly;
FIG. 2 is a schematic structural view of an arc-shaped expansion-preventing piece and a cross-shaped pull rod;
fig. 3 is a schematic structural diagram of embodiment 2 of the cast aluminum piston according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
referring to fig. 1-2, an embodiment of the present invention includes:
a cast aluminum piston based expansion assembly comprising: piston base member 1 and prevent subassembly that expands, prevent the subassembly that expands and include: cross pull rod 2 and 4 arc-shaped anti-expansion pieces 3. 4 the arc prevents the bloated piece 3 evenly distributed in the inner wall of piston base member 1, 4 tip of cross pull rod 2 extend to respectively in the inner wall of piston base member 1 and are connected with 4 arc prevent bloated pieces 3, 4 tip and 4 arc of cross pull rod 2 prevent through welded fastening between bloated piece 3. Through the setting of the arc-shaped anti-expansion piece 3 and the cross pull rod 2, the cross pull rod 2 is used for pulling and fixing the arc-shaped anti-expansion piece 3, and the inhibition effect on the thermal expansion of the side wall of the piston is greatly improved.
The piston is characterized in that a cavity 4 is formed in the piston base body 1, the cross-shaped pull rod 2 is horizontally arranged in the cavity 4 of the piston base body 1, pin hole seats 5 extending into the cavity 4 are symmetrically arranged on the lower portion of the piston base body 1, and pin shaft mounting holes 6 are formed in the pin hole seats 5 and used for supporting two ends of a pin shaft. Be provided with jump ring mounting groove 7 in the round pin axle mounting hole 6, make things convenient for the installation of jump ring, carry on spacingly to the both ends of round pin axle, avoid the axial to slide.
The arc-shaped anti-expansion piece 3 and the cross pull rod 2 are both located above the pin hole seat 5, and the top surface and the bottom surface of the arc-shaped anti-expansion piece 3 are both provided with concave structures. The indent structure is rectangle recess 8, and the top surface and the bottom surface of arc anti-swelling piece 3 all are provided with 3 at least rectangle recesses 8. During the mould was put into to the piece 3 that expands is prevented to the arc, carries out the casting of piston base member 1, and partial cast aluminium material fills in getting into rectangle recess 8, has strengthened the arc and has prevented the combination effect of expanding piece 3 and piston base member 1, on the arc prevent expanding piece 3 prevent expanding the basis, utilize rectangle recess 8 to the spacing of partial cast aluminium material, promote the effect that restraines piston base member 1 lateral wall inflation.
The piston base body 1 and the pin hole base 5 are of an integrated cast aluminum structure, and are light in weight, high in structural strength and beneficial to reducing the energy consumption of an engine.
Be provided with gas ring groove 9 and oil ring groove 10 on the excircle of piston base member 1, gas ring groove 9 is located the top of oil ring groove 10, carries out the installation of gas ring and oil ring respectively, promotes piston motion's gas tightness, reduces the machine oil loss.
A plurality of annular radiating fins 11 are arranged on the cross pull rod 2 at intervals, and the annular radiating fins 11 are made of metal sheets and welded on the cross pull rod 2, so that the cooling effect is further improved.
The arc-shaped anti-expansion pieces 3 and the cross pull rod 2 are made of metal materials with low expansion coefficients, such as iron-nickel alloy, so that the problem of thermal expansion deformation is solved.
Example 2:
referring to fig. 3, the embodiment 2 of the present invention is basically similar to the embodiment 1 in structure, and the only difference is that the concave structure is a triangular groove 12, and the top surface and the bottom surface of the arc-shaped expansion-preventing piece 3 are both provided with at least 3 triangular grooves 12, the arc-shaped expansion-preventing piece 3 is placed into the mold, the piston base body 1 is cast, and a part of cast aluminum material enters the triangular grooves 12 for filling, so that the combination effect of the arc-shaped expansion-preventing piece 3 and the piston base body 1 is enhanced.
To sum up, the utility model provides a cast aluminium piston based on expansion assembly prevents the setting of bloated piece and cross pull rod through the arc, and the cross pull rod prevents the bloated piece to the arc and draws admittedly, has promoted the suppression effect to piston side wall thermal energy greatly, and further top surface and the low side that prevent the bloated piece at the arc through set up the indent structure, strengthen the arc and prevent the combination effect of bloated piece and piston base member.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (8)
1. A cast aluminum piston based expansion assembly, comprising: piston base member and prevent subassembly that expands, prevent that the subassembly that expands includes: the anti-expansion piston comprises a cross pull rod and 4 arc anti-expansion pieces, wherein a cavity is formed in a piston base body, pin hole seats extending into the cavity are symmetrically arranged on the lower portion of the piston base body, the 4 arc anti-expansion pieces are evenly distributed in the inner wall of the piston base body, the cross pull rod is horizontally arranged in the cavity of the piston base body, 4 end portions of the cross pull rod respectively extend into the inner wall of the piston base body and are connected with the 4 arc anti-expansion pieces, the arc anti-expansion pieces and the cross pull rod are located above the pin hole seats, and the top surfaces and the bottom surfaces of the arc anti-expansion pieces are provided with concave structures.
2. The expansion assembly-based cast aluminum piston of claim 1, wherein the concave structure is a rectangular groove, and the top surface and the bottom surface of the arc-shaped expansion prevention piece are provided with at least 3 rectangular grooves.
3. The expansion assembly-based cast aluminum piston of claim 1, wherein the concave structure is a triangular groove, and the top surface and the bottom surface of the arc-shaped expansion prevention piece are provided with at least 3 triangular grooves.
4. The cast aluminum piston based on the expansion assembly as claimed in claim 1, wherein 4 ends of the cross tie bar are fixed with 4 arc-shaped anti-expansion pieces by welding.
5. The cast aluminum piston based on the expansion assembly as claimed in claim 1, wherein a pin shaft mounting hole is provided in the pin shaft seat, and a snap spring mounting groove is provided in the pin shaft mounting hole.
6. The expansion assembly-based cast aluminum piston of claim 1 wherein the piston base and pin bore seat are a unitary cast aluminum structure.
7. The expansion assembly based cast aluminum piston of claim 1 wherein the outer circumference of the piston base body is provided with a gas ring groove and an oil ring groove, the gas ring groove being located above the oil ring groove.
8. The expansion assembly-based cast aluminum piston of any of claims 1-7, wherein the cross tie rod is provided with a plurality of annular heat dissipating fins at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020167147.0U CN211819691U (en) | 2020-02-13 | 2020-02-13 | Cast aluminum piston based on expansion assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020167147.0U CN211819691U (en) | 2020-02-13 | 2020-02-13 | Cast aluminum piston based on expansion assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211819691U true CN211819691U (en) | 2020-10-30 |
Family
ID=72992796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020167147.0U Expired - Fee Related CN211819691U (en) | 2020-02-13 | 2020-02-13 | Cast aluminum piston based on expansion assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211819691U (en) |
-
2020
- 2020-02-13 CN CN202020167147.0U patent/CN211819691U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201030 Termination date: 20210213 |
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| CF01 | Termination of patent right due to non-payment of annual fee |