CN202250324U - Connection structure for silencer of low-emission two-stroke gasoline engine - Google Patents
Connection structure for silencer of low-emission two-stroke gasoline engine Download PDFInfo
- Publication number
- CN202250324U CN202250324U CN2011203586384U CN201120358638U CN202250324U CN 202250324 U CN202250324 U CN 202250324U CN 2011203586384 U CN2011203586384 U CN 2011203586384U CN 201120358638 U CN201120358638 U CN 201120358638U CN 202250324 U CN202250324 U CN 202250324U
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- CN
- China
- Prior art keywords
- baffler
- nut
- silencer
- bolt
- exhaust flange
- 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 - Lifetime
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- Exhaust Silencers (AREA)
Abstract
The utility model discloses a connection structure for a silencer of a low-emission two-stroke gasoline engine, which comprises an air exhaust flange, a silencer pad, a silencer, a flat washer, a spring washer, bolts and nuts. The connection structure is characterized in that two bolt holes are symmetrically arranged in the air exhaust flange, two nut accommodating chambers are positioned on one side of the air exhaust flange towards a cylinder body, the central lines of the nut accommodating chambers and the bolt holes coincide, and the bolts penetrate through the spring washer, the flat washer, the silencer and the silencer pad to be connected with the nuts to fix the silencer on the air exhaust flange. The connection structure can effectively resolve the problem of bolt looseness caused by high temperature on the side of the silencer.
Description
Technical field
The utility model 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 owing to the cause of its working principle, and its discharging is difficult to reach at present the requirement of the Abgasgesetz of promulgation just, must carry out external purification; The means of external purification make waste gas in baffler, carry out secondary combustion, therefore in baffler, to increase catalyzer at present; Satisfying under the situation of emission request, the temperature of baffler side cylinder body flanged surface reaches between 300 ℃～400 ℃, on the exhaust flange face of cylinder body, processes two tapped holes according to traditional Placement; With bolt pass baffler, the baffler pad is fixed on the exhaust flange of cylinder body, but this kind Placement is in the process of machine run, in the baffler owing to add catalyzer; Waste gas carries out secondary combustion in baffler; The temperature of baffler side, exhaust flange side reaches more than 300 ℃, and cylinder body is an aluminum alloy at present, and its tensile strength is reducing by 70% under the high temperature for a long time; Therefore screw-down torque is retained in about 20%, can not satisfy locking usage requirement.Therefore, be badly in need of wanting a kind of at high temperature with the firm connection structure connecting of baffler.
Summary of the invention
The purpose of the utility model provides a kind of linkage structure of low-discharge two-stroke gasoline engine baffler; Through being set, nut places the chamber on the cylinder body exhaust flange; Firmly be connected baffler on the exhaust flange through bolt, packing ring and nut; Make temperature be reduced to minimum, reached locking purpose for the influence of screw-down torque.
The technological scheme that the utility model is taked is; A kind of linkage structure of low emission petrol engine baffler; 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 nuts at exhaust flange towards a side of cylinder body and place chambers, said nut is placed the chamber and is overlapped with said bolt hole center line; Bolt is fastened on baffler on the exhaust flange through dual mode: a kind of is that the threaded end of bolt passes spring washer, plain washer, baffler, baffler pad, said bolt hole successively and places indoor nut with said nut and be connected; Another kind is that the threaded end of bolt passes said bolt hole, baffler pad, baffler, plain washer, spring washer successively 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 locking purpose.
Description of drawings
Fig. 1 is the scheme schematic representation of the utility model
Fig. 2 is that the utility model nut is placed on the exploded view that nut is placed the chamber
Fig. 3 B is to view
Fig. 4 is that the utility model bolt head is placed on the exploded view that nut is placed the chamber
Fig. 5 A is to view
Fig. 6 is the tightening torque comparison diagram of the utility model and existing technology bolt after petrol engine moves half an hour
Sequence number explanation in the accompanying drawing: 1, nut is placed the 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
Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, the baffler linkage structure of the utility model is made up of exhaust flange 2 (nut is placed 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.
Nut is placed chamber 1 in the side of exhaust flange 2 towards cylinder body, and bolt hole 8 is symmetrical set for 2 li at exhaust flange, and two nuts place chamber 1 respectively with two bolts hole, 8 central lines; Exhaust flange 2 side of cylinder body dorsad is baffler pad 3, baffler 4, plain washer 5, spring washer 6 successively; When nut 9 was put into nut placement chamber 1, bolt 7 threaded end penetrated and nut 9 connections from spring washer 6 ends successively; When bolt head 12 was put into nut placement chamber 1, threaded end penetrated and nut 9 connections from bolt hole 8 successively.
Concrete working procedure is following:
Connecting means one: nut 9 is put into nut place chamber 1, the threaded end of bolt 7 penetrates spring washer 6, plain washer 5, baffler 4, baffler pad 3, bolt hole 8 and nut 9 successively and screws.
Connecting means two: bolt head 12 is put into nut and is placed chamber 1, and threaded end penetrates bolt hole 8, baffler pad 3, baffler 4, plain washer 5, spring washer 6 and nut 8 successively and screws.
Beneficial effect:
Compare according to the baffler Placement of above-mentioned model utility design and traditional direct each 10 of Placements that on exhaust flange, process the baffler of screw thread, it is fastening to use the moment of torsion of 10N.m to carry out simultaneously these two kinds of Placements, and machine run is after 30 minutes; Again detect the tightening torque of screw; The result is as shown in Figure 6, and as can be seen from the figure, the tightening torque of the utility model baffler screw keeps about 90%; Satisfy usage requirement; And the tightening torque of the baffler screw of existing technology keeps about 20%, is prone to become flexible, and does not satisfy usage requirement.
Claims (1)
1. low-discharge two-stroke gasoline engine baffler linkage structure; 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 nuts at exhaust flange towards a side of cylinder body and place chambers, said nut is placed the chamber and is overlapped with said bolt hole center line; Bolt is fastened on baffler on the exhaust flange through dual mode: a kind of is that the threaded end of bolt passes spring washer, plain washer, baffler, baffler pad, said bolt hole successively and places indoor nut with said nut and be connected; Another kind is that the threaded end of bolt passes said bolt hole, baffler pad, baffler, plain washer, spring washer successively and is connected with nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203586384U CN202250324U (en) | 2011-08-26 | 2011-08-26 | Connection structure for silencer of low-emission two-stroke gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203586384U CN202250324U (en) | 2011-08-26 | 2011-08-26 | Connection structure for silencer of low-emission two-stroke gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202250324U true CN202250324U (en) | 2012-05-30 |
Family
ID=46111581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203586384U Expired - Lifetime CN202250324U (en) | 2011-08-26 | 2011-08-26 | Connection structure for silencer of low-emission two-stroke gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202250324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330593A (en) * | 2011-08-26 | 2012-01-25 | 山东华盛农业药械有限责任公司 | Connection structure of low-emission double-stroke gasoline engine silencer |
-
2011
- 2011-08-26 CN CN2011203586384U patent/CN202250324U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330593A (en) * | 2011-08-26 | 2012-01-25 | 山东华盛农业药械有限责任公司 | Connection structure of low-emission double-stroke gasoline engine silencer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |