CN213574384U - Combined piston connected by using double-end stud - Google Patents
Combined piston connected by using double-end stud Download PDFInfo
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- CN213574384U CN213574384U CN202021567115.6U CN202021567115U CN213574384U CN 213574384 U CN213574384 U CN 213574384U CN 202021567115 U CN202021567115 U CN 202021567115U CN 213574384 U CN213574384 U CN 213574384U
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- piston skirt
- cooling oil
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Abstract
The utility model discloses a combined piston connected by stud, which comprises a first combined device, a second combined device and a third combined device, wherein the first combined device, the second combined device and the third combined device are all arranged in an internal combustion engine, the first combined device comprises a first piston skirt, the first piston skirt is arranged in the internal combustion engine, a first oil return hole is arranged in the first piston skirt, only one stud is adopted to fasten the piston top and the piston skirt together, the stud is positioned at the central position of the piston, after the piston top and the piston skirt are fastened together by a nut, the circumferential deformation of the piston top is uniform, the performance influence of the combined piston is minimal, only one stud is used, compared with a plurality of bolts, because the number of parts of the combined piston is reduced, the reliability of the combined piston is greatly improved, after the piston top and the piston skirt are screwed up by the nut, reliable connection, long service life and difficult looseness of the nut.
Description
Technical Field
The utility model belongs to the piston field, concretely relates to use combination piston that stud connects.
Background
With the development of the internal combustion engine technology, the internal combustion engine has higher efficiency, more environment-friendly emission and longer service life, the internal combustion engine is widely applied to the fields of commercial vehicles, ship power, generator sets and the like, the piston is mainly formed by combining a piston top and a piston skirt, the piston is distinguished from the traditional piston and is called a combined piston, the service life of the combined piston cooled by using cooling engine oil is greatly prolonged, the main connection mode of the piston top and the piston skirt of the combined piston is divided into two modes of bolt connection and welding, and the combined piston connected by bolts mainly comprises two bolts and four bolts at present.
The existing piston bolt connection has certain defects, the combined piston connected by two bolts only has two bolts, the pretightening force applied to the top of the piston by the bolts is only two, the deformation of the position of the top of the piston close to the bolts is inconsistent with the deformation of the position far away from the bolts, and the combined piston connected by four bolts can ensure the consistency of the distances between the four bolts as far as possible, but the deformation of the position close to the bolts is inconsistent with the deformation of the position between the two bolts.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an use composite piston that stud connects to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a composite piston connected using a stud includes a first composite set, a second composite set, and a third composite set, each disposed within an internal combustion engine.
Example 1
Preferably, the first combination device comprises a first piston skirt, the first piston skirt is arranged in the internal combustion engine, a first oil return hole is formed in the first piston skirt, a first piston crown is arranged above the first piston skirt, a first threaded hole is formed in the bottom of the first piston crown, the first threaded hole is opposite to the first oil return hole, a first stud is arranged in the first threaded hole and is in threaded connection with the first threaded hole, the bottom of the first stud penetrates through the first oil return hole and extends to the position below the first oil return hole, a first nut is arranged at the bottom of the first stud, the first nut is provided with an oil return passage, cooling engine oil in the first oil return hole can flow out of the combination piston to complete the exchange of the cooling engine oil, and a first inner cooling oil cavity and a first outer cooling oil cavity are arranged between the first piston skirt and the first piston crown, the first inner cooling oil cavity is communicated with the first outer cooling oil cavity.
Example 2
Preferably, the second combination device comprises a second piston skirt, the second piston skirt is arranged in the internal combustion engine, a second oil return hole is formed in the second piston skirt, a cushion block is arranged in the second oil return hole, the cushion block is provided with an oil return channel, the cooling engine oil in the second oil return hole can flow out of the combination piston to complete the exchange of the cooling engine oil, a second piston top is arranged above the second piston skirt, a second threaded hole is formed in the bottom of the second piston top and is opposite to the second oil return hole in position, a second stud is arranged in the second threaded hole and is in threaded connection with the second threaded hole, one end of the second stud penetrates through the cushion block and the second oil return hole, a second nut is arranged at the bottom of the second stud, and a second inner cooling oil cavity and a second outer cooling oil cavity are arranged between the second piston top and the second piston skirt, and the second inner cooling oil cavity is communicated with the second outer cooling oil cavity.
Example 3
Preferably, the third combination device comprises a third piston skirt, the third piston skirt is arranged in the internal combustion engine, a third oil return hole is formed in the third piston skirt, a bell-shaped cover is arranged in the third oil return hole, a third piston top is arranged above the third piston skirt, a third threaded hole is formed in the bottom of the third piston top, a third stud is arranged in the third threaded hole and is in threaded connection with the third threaded hole, one end of the third stud penetrates through the third oil return hole and the bell-shaped cover, a third nut is arranged at the bottom of the third stud, the third nut is provided with an oil return channel, cooling engine oil in the first oil return hole can flow out of the combined piston to complete the exchange of the cooling engine oil, and a third inner cooling oil cavity and a third outer cooling oil cavity are arranged between the third piston skirt and the third piston top, and the third inner cooling oil cavity is communicated with the third outer cooling oil cavity.
Compared with the prior art, the beneficial effects of the utility model are that: the piston crown and the piston skirt are fastened together only by adopting one stud, the position of the stud is located at the center of the piston, after the piston crown and the piston skirt are fastened together by using the nut, the circumferential deformation of the piston crown is uniform, the performance influence of the combined piston is minimal, and only one stud is used.
Drawings
FIG. 1 is a schematic view of a first combined piston connection structure;
FIG. 2 is a schematic view of a second combined piston connection structure;
FIG. 3 is a schematic view of a third composite piston connection structure;
in the figure: 1. a first combining means; 101. a first piston crown; 102. a first piston skirt; 103. a first stud; 104. a first internal cooling oil cavity; 105. a first outer cooling gallery; 106. a first nut; 107. a first threaded hole; 108. a first oil return hole; 2. a second combining means; 201. a second piston crown; 202. a second piston skirt; 203. a second stud; 204. a second internal cooling oil cavity; 205. a second outer cooling gallery; 206. a second nut; 207. cushion blocks; 208. a second threaded hole; 209. a second oil return hole; 3. a third combination device; 301. a third piston crown; 302. a third piston skirt; 303. a third stud; 304. a third internal cooling oil cavity; 305. a third outer cooling gallery; 306. a third nut; 307. a bell jar; 308. a third threaded hole; 309. and a third oil return hole.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-3, the present invention provides the following technical solutions: a combined piston connected by using a double-end stud comprises a first combined device 1, a second combined device 2 and a third combined device 3, wherein the first combined device 1, the second combined device 2 and the third combined device 3 are all arranged in an internal combustion engine.
In order to ensure the assembling accuracy, the mating surface of the first nut 106 and the first piston skirt 102 may be designed to be a spherical surface or a conical surface, the first piston crown 101 may be made of alloy steel, and the first piston skirt 102 may be made of alloy such as aluminum alloy, ductile iron, and alloy steel, in this embodiment, preferably, the first assembling device 1 includes the first piston skirt 102, the first piston skirt 102 is disposed in an internal combustion engine, a first oil return hole 108 is disposed in the first piston skirt 102, the first piston crown 101 is disposed above the first piston skirt 102, a first threaded hole 107 is disposed at the bottom of the first piston skirt 101, the first threaded hole 107 is opposite to the first oil return hole 108, a first stud 103 is disposed in the first threaded hole 107, the first stud 103 is in threaded connection with the first threaded hole 107, the bottom of the first stud 103 penetrates through the first oil return hole 108 and extends to below the first oil return hole 108, a first nut 106 is disposed at the bottom of the first stud 103, the first nut 106 is provided with an oil return passage which enables cooling oil in the first oil return hole 108 to flow out of the combined piston to complete exchange of the cooling oil, a first inner cooling oil chamber 104 and a first outer cooling oil chamber 105 are arranged between the first piston skirt 102 and the first piston crown 101, and the first inner cooling oil chamber 104 is communicated with the first outer cooling oil chamber 105.
In order to ensure that the matching surfaces of the pad 207 and the second piston skirt 202 can be designed to be spherical surfaces or conical surfaces, the matching surfaces of the pad 207 and the second nut 206 can be designed to be spherical surfaces or conical surfaces, the second piston crown 201 can be made of alloy steel, the second piston skirt 202 can be made of alloy steel, aluminum alloy, ductile iron, alloy steel and the like, in this embodiment, preferably, the second assembly device 2 comprises the second piston skirt 202, the second piston skirt 202 is arranged in the internal combustion engine, a second oil return hole 209 is arranged in the second piston skirt 202, the pad 207 is arranged in the second oil return hole 209, the pad 207 has an oil return channel, so that the cooling oil in the second oil return hole 209 can flow out of the combined piston to complete the exchange of the cooling oil, the second piston crown 201 is arranged above the second piston skirt 202, a second threaded hole 208 is arranged at the bottom of the second piston crown 201, and the second threaded hole 208 is opposite to the second oil return hole 209, a second stud 203 is arranged in the second threaded hole 208, the second stud 203 is in threaded connection with the second threaded hole 208, one end of the second stud 203 penetrates through the cushion block 207 and the second oil return hole 209, a second nut 206 is arranged at the bottom of the second stud 203, a second inner cooling oil cavity 204 and a second outer cooling oil cavity 205 are arranged between the second piston crown 201 and the second piston skirt 202, and the second inner cooling oil cavity 204 is communicated with the second outer cooling oil cavity 205.
In order to ensure that the matching surfaces of the bell jar 307 and the third piston skirt 302 are designed to be spherical surfaces or conical surfaces, the third piston crown 301 can be made of alloy steel, the third piston skirt 302 can be made of alloy steel, such as aluminum alloy, ductile iron, alloy steel, and the like, in this embodiment, preferably, the third combination device 3 comprises the third piston skirt 302, the third piston skirt 302 is disposed in the internal combustion engine, a third oil return hole 309 is disposed in the third piston skirt 302, a bell jar 307 is disposed in the third oil return hole 309, the third piston crown 301 is disposed above the third piston skirt 302, a third threaded hole 308 is disposed at the bottom of the third piston crown 301, a third stud 303 is disposed in the third threaded hole 308, the third stud 303 is in threaded connection with the third threaded hole 308, one end of the third stud 303 penetrates through the third oil return hole 309 and the bell jar 307, a third nut 306 is disposed at the bottom of the third stud 303, a third inner cooling oil chamber 304 and a third outer cooling oil chamber 305 are provided between the third piston skirt 302 and the third piston crown 301, and the third inner cooling oil chamber 304 communicates with the third outer cooling oil chamber 305.
The utility model discloses a theory of operation and use flow: the utility model discloses after having installed, at first inspect the utility model discloses an installation is fixed and safety protection, then just can use, during the use, in the first screw hole 107 of first piston top 101 is twisted into with the one end of first stud 103 when using first composite set 1, utilize the instrument to clip to pull the part of screwing up and screw up first stud 103, first nut 106 is twisted into first stud 103 from first piston skirt 102 inner chamber top, and apply corresponding tightening torque, utilize first stud 103 and first nut 106 to fasten first piston skirt 102 and first piston top 101 together, after the cooling machine oil in the first outer cooling oil pocket 105 got into first inner cooling oil pocket 104 through connecting channel, the cooling machine oil flowed into inside first nut 106, through the first nut 106 combination piston that flows out, accomplish the exchange of cooling machine oil; when the second combination device 2 is used, one end of a second stud 203 is screwed into a second threaded hole 208 of a second piston top 201, the second stud 203 is screwed by clamping a screwing part with a tool, a cushion block 207 is added between a second nut 206 and a second piston skirt 202, the second nut 206 is screwed into the second stud 203 from the top of the inner cavity of the second piston skirt 202, corresponding screwing torque is applied, the second piston skirt 202, the second piston top 201 and the cushion block 207 are fastened together by using the second stud 203 and the second nut 206, cooling oil in a second outer cooling oil cavity 205 enters a second inner cooling oil cavity 204 through a connecting channel, the cooling oil flows into the cushion block 207, and the cooling oil flows out of the combination piston through the cushion block 207, so that the exchange of the cooling oil is completed; when the third combination device 3 is used, one end of the third stud bolt 303 is screwed into the third threaded hole 308 of the third piston crown 301, the third stud bolt 303 is screwed by clamping a screwing part with a tool, a bell-shaped cover 307 is added between the third nut 306 and the third piston skirt 302, the third nut 306 is screwed into the third stud bolt 303 from the top of the inner cavity of the third piston skirt 302, a corresponding screwing torque is applied, the third piston skirt 302, the third piston crown 301 and the bell-shaped cover 307 are fastened together by using the third stud bolt 303 and the third nut 306, cooling oil in the third outer cooling oil cavity 305 enters the third inner cooling oil cavity 304 through the connecting passage, the cooling oil flows into the third nut 306, and the cooling oil flows out of the combination piston through the third nut 306, so that the exchange of the cooling oil is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. Composite piston for a stud-and-bolt connection, comprising a first (1), a second (2) and a third (3) composite device, characterized in that: the first combination device (1), the second combination device (2) and the third combination device (3) are all arranged in an internal combustion engine; the first combination device (1) comprises a first piston skirt (102), the first piston skirt (102) is arranged in an internal combustion engine, a first oil return hole (108) is arranged in the first piston skirt (102), a first piston crown (101) is arranged above the first piston skirt (102), a first threaded hole (107) is arranged at the bottom of the first piston crown (101), the first threaded hole (107) is opposite to the first oil return hole (108), a first stud (103) is arranged in the first threaded hole (107), the first stud (103) is in threaded connection with the first threaded hole (107), the bottom of the first stud (103) penetrates through the first oil return hole (108) and extends to the position below the first oil return hole (108), a first nut (106) is arranged at the bottom of the first stud (103), a first inner cooling oil cavity (104) and a first outer cooling oil cavity (104) are arranged between the first piston skirt (102) and the first piston crown (101) A cooling oil chamber (105), the first inner cooling oil chamber (104) being in communication with a first outer cooling oil chamber (105); the second combination device (2) comprises a second piston skirt (202), the second piston skirt (202) is arranged in the internal combustion engine, a second oil return hole (209) is formed in the second piston skirt (202), a cushion block (207) is arranged in the second oil return hole (209), a second piston top (201) is arranged above the second piston skirt (202), a second threaded hole (208) is formed in the bottom of the second piston top (201), the second threaded hole (208) is opposite to the second oil return hole (209), a second stud (203) is arranged in the second threaded hole (208), the second stud (203) is in threaded connection with the second threaded hole (208), one end of the second stud (203) penetrates through the cushion block (207) and the second oil return hole (209), and a second nut (206) is arranged at the bottom of the second stud (203), a second inner cooling oil cavity (204) and a second outer cooling oil cavity (205) are arranged between the second piston crown (201) and the second piston skirt (202), and the second inner cooling oil cavity (204) is communicated with the second outer cooling oil cavity (205); the third combination device (3) comprises a third piston skirt (302), the third piston skirt (302) is arranged in an internal combustion engine, a third oil return hole (309) is formed in the third piston skirt (302), a bell-shaped cover (307) is arranged in the third oil return hole (309), a third piston top (301) is arranged above the third piston skirt (302), a third threaded hole (308) is formed in the bottom of the third piston top (301), a third stud (303) is arranged in the third threaded hole (308), the third stud (303) is in threaded connection with the third threaded hole (308), one end of the third stud (303) penetrates through the third oil return hole (309) and the bell-shaped cover (307), a third nut (306) is arranged at the bottom of the third stud (303), a third inner cooling oil cavity (304) and a third outer cooling oil cavity (305) are arranged between the third piston skirt (302) and the third piston top (301), the third inner cooling oil chamber (304) is in communication with a third outer cooling oil chamber (305).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021567115.6U CN213574384U (en) | 2020-08-01 | 2020-08-01 | Combined piston connected by using double-end stud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021567115.6U CN213574384U (en) | 2020-08-01 | 2020-08-01 | Combined piston connected by using double-end stud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213574384U true CN213574384U (en) | 2021-06-29 |
Family
ID=76553911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021567115.6U Active CN213574384U (en) | 2020-08-01 | 2020-08-01 | Combined piston connected by using double-end stud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213574384U (en) |
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2020
- 2020-08-01 CN CN202021567115.6U patent/CN213574384U/en active Active
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