CN102330593B - Connection structure of low-emission double-stroke gasoline engine silencer - Google Patents
Connection structure of low-emission double-stroke gasoline engine silencer Download PDFInfo
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- CN102330593B CN102330593B CN 201110279139 CN201110279139A CN102330593B CN 102330593 B CN102330593 B CN 102330593B CN 201110279139 CN201110279139 CN 201110279139 CN 201110279139 A CN201110279139 A CN 201110279139A CN 102330593 B CN102330593 B CN 102330593B
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- baffler
- nut
- bolt
- silencer
- connection structure
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Abstract
The invention discloses a connection structure of a low-emission double-stroke gasoline engine silencer. The structure comprises a venting flange, a silencer pad, a silencer, a flat washer, a spring washer, a bolt and a nut. The connection structure is characterized in that the venting flange is symmetrically provided with two bolt holes; one side of the venting flange, which faces to a cylinder body, is provided with two nut arrangement chambers; the center line of the nut arrangement chambers and the center line of the bolt holes are coincident; and the bolt passes through the spring washer, the flat washer, the silencer and the spring washer to be connected with the nut to fix the silencer on the venting flange. According to the connection structure, the problem that the bolt is loosened because the temperature of the silencer side is overhigh can be effectively solved.
Description
Technical field
The present invention relates to low-discharge two-stroke gasoline engine, particularly a kind of baffler linkage structure of low-discharge two-stroke gasoline engine.
Background technique
Two-stroke gasoline engine is because the cause of its working principle, its discharging is difficult to reach the requirement of the Abgasgesetz of just having promulgated at present, must carry out external purification, the means of external purification are for increasing catalyzer in baffler at present, make waste gas in baffler, carry out secondary combustion, therefore, in the situation that satisfy emission request, the temperature of baffler side cylinder body flanged surface reaches between 300 ℃～400 ℃, process two tapped holes according to traditional Placement at the exhaust flange face of cylinder body, pass baffler with bolt, the baffler pad is fixed on the exhaust flange of cylinder body, but this kind Placement is in the process of machine run, owing to adding catalyzer, waste gas carries out secondary combustion in baffler in the baffler, the baffler side, the temperature of exhaust flange side reaches more than 300 ℃, and cylinder body is aluminum alloy at present, and its tensile strength is reducing by 70% under the high temperature for a long time, so screw-down torque is retained in about 20%, can not satisfy locking usage requirement, the loosening phenomenon of baffler often occur.Therefore, be badly in need of wanting a kind of linkage structure that at high temperature baffler is firmly connected.
Summary of the invention
The linkage structure that the purpose of this invention is to provide a kind of low-emission double-stroke gasoline engine silencer, by at the cylinder body exhaust flange nut holding chamber being set, firmly be connected to baffler on the exhaust flange by bolt, packing ring and nut, make temperature be reduced to minimum for the impact of screw-down torque, reached locking purpose.
The technological scheme that the present invention takes is, a kind of connection structure of low-emission double-stroke gasoline engine silencer, draw together exhaust flange, baffler pad, baffler, plain washer, spring washer, bolt, nut, it is characterized in that: in exhaust flange, be symmetrically arranged with two bolts hole, be provided with two nut holding chambers at exhaust flange towards a side of cylinder body, described nut holding chamber overlaps with described bolt hole center line; Bolt is fastened on baffler on the exhaust flange by dual mode: a kind of is that the threaded end of bolt passes successively spring washer, plain washer, baffler, baffler pad, described bolt hole and is connected with nut in the described nut holding chamber; Another kind is that the threaded end of bolt passes successively described bolt hole, baffler pad, baffler, plain washer, spring washer and is connected with nut.
Beneficial effect is: compare with traditional Placement, when high temperature, the tensile strength of nut is higher by 70% than the tensile strength of aluminum alloy screw thread during owing to connection, and the screw-down torque of screw is retained in about 90%, has reached and has loosened purpose.
Description of drawings
Fig. 1 is the solution of the present invention schematic diagram
Fig. 2 is the exploded view that nut of the present invention is placed on the nut holding chamber
Fig. 3 B is to view
Fig. 4 is the exploded view that bolt head of the present invention is placed on the nut holding chamber
Fig. 5 A is to view
Fig. 6 is the tightening torque comparison diagram of the present invention and prior art bolt after petrol engine moves half an hour
Sequence number explanation in the accompanying drawing: 1, nut holding chamber; 2, exhaust flange; 3, baffler pad; 4, baffler; 5, plain washer; 6, spring washer; 7, bolt; 8, bolt hole; 9, nut; 10, baffler pad hole; 11, baffler hole; 12, bolt head.
Embodiment
Such as Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, baffler linkage structure of the present invention is comprised of exhaust flange 2 (nut holding chamber 1, bolt hole 8), baffler pad 3 (baffler pad hole 10), baffler 4 (baffler hole 11), plain washer 5, spring washer 6, bolt 7 (bolt head 12), nut 9.
The specific works process is as follows:
Connecting means one: nut 9 is put into nut holding chamber 1, and the threaded end of bolt 7 penetrates successively spring washer 6, plain washer 5, baffler 4, baffler pad 3, bolt hole 8 and nut 9 and screws.
Connecting means two: bolt head 12 is put into nut holding chamber 1, and threaded end penetrates successively bolt hole 8, baffler pad 3, baffler 4, plain washer 5, spring washer 6 and nut 8 and screws.
Beneficial effect:
Compare according to the baffler Placement of foregoing invention design and traditional direct each 10 of Placements that process the baffler of screw thread at exhaust flange, use simultaneously the moment of torsion of 10N.m to carry out fastening these two kinds of Placements, the machine operation is after 30 minutes, again detect the tightening torque of screw, the result as shown in Figure 6, as can be seen from the figure, the tightening torque of baffler screw of the present invention keeps about 90%, satisfy usage requirement, and the tightening torque of the baffler screw of prior art keeps about 20%, easily loosening, do not satisfy usage requirement.
Claims (1)
1. connection structure of low-emission double-stroke gasoline engine silencer, comprise exhaust flange, baffler pad, baffler, plain washer, spring washer, bolt, nut, it is characterized in that: in exhaust flange, be symmetrically arranged with two bolts hole, be provided with two nut holding chambers at exhaust flange towards a side of cylinder body, described nut holding chamber overlaps with described bolt hole center line; Bolt is fastened on baffler on the exhaust flange by dual mode: a kind of is that the threaded end of bolt passes successively spring washer, plain washer, baffler, baffler pad, described bolt hole and is connected with nut in the described nut holding chamber; Another kind is that bolt head is put into the nut holding chamber, and the threaded end of bolt passes successively described bolt hole, baffler pad, baffler, plain washer, spring washer and is connected with nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110279139 CN102330593B (en) | 2011-08-26 | 2011-08-26 | Connection structure of low-emission double-stroke gasoline engine silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110279139 CN102330593B (en) | 2011-08-26 | 2011-08-26 | Connection structure of low-emission double-stroke gasoline engine silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102330593A CN102330593A (en) | 2012-01-25 |
| CN102330593B true CN102330593B (en) | 2013-02-13 |
Family
ID=45482520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110279139 Active CN102330593B (en) | 2011-08-26 | 2011-08-26 | Connection structure of low-emission double-stroke gasoline engine silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102330593B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266851A (en) * | 1997-03-21 | 1998-10-06 | Mitsubishi Heavy Ind Ltd | Exhaust device of engine |
| DE69907912T2 (en) * | 1999-10-20 | 2004-05-13 | Umicore Ag & Co.Kg | Muffler with catalytic device for two-stroke internal combustion engines and catalytic device therefor |
| CA2720477C (en) * | 2008-04-04 | 2017-03-07 | Maxtech Consumer Products Limited | Flange assembly with improved serviceability |
| CN202250324U (en) * | 2011-08-26 | 2012-05-30 | 山东华盛农业药械有限责任公司 | Connection structure for silencer of low-emission two-stroke gasoline engine |
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2011
- 2011-08-26 CN CN 201110279139 patent/CN102330593B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102330593A (en) | 2012-01-25 |
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