CN204877622U - Engine exhaust pipe compresses tightly anti loosening structure - Google Patents
Engine exhaust pipe compresses tightly anti loosening structure Download PDFInfo
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- CN204877622U CN204877622U CN201520568622.4U CN201520568622U CN204877622U CN 204877622 U CN204877622 U CN 204877622U CN 201520568622 U CN201520568622 U CN 201520568622U CN 204877622 U CN204877622 U CN 204877622U
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- nut
- blast pipe
- lock nut
- frustum
- outlet pipe
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Abstract
The utility model discloses an engine exhaust pipe compresses tightly anti loosening structure twists the cylinder cap in blast pipe stud one end, and one end compresses tightly fixed blast pipe through locknut in addition, increases by one and fill up the cover between blast pipe and locknut, fills up the side of cover and scribbles the friction coat in the two sides about and, and locknut's tail end be the frustum type, and the frustum is slotted to carry out mechanical predeformation at the frustum afterbody for the intermediate position of locknut opposite side, through intercalary band coating pad cover, reduce the high temperature that the blast pipe reached double -screw bolt and nut, reduce the heat altered shape volume of double -screw bolt and nut, reduce under high low -temperature impact condition the friction between blast pipe nut and the exhaust manifold flange face simultaneously, only produce relative translational slip when making the blast pipe receive heat altered shape and between the nut, through the mechanical predeformation of nut tail end, prevent that the nut from taking off vibration in -process pine to the realization blast pipe is locking.
Description
Technical field
The utility model relates to waste pipe gland nut, and especially a kind of engine exhaust pipe compresses anti-loose structure.
Background technique
Along with the technical development of motor, HP, hp/litre improves constantly, the delivery temperature of motor constantly raises, traditional outlet pipe is locking adopts the outlet pipe stud and nut of selecting exotic material, if linear expansion coeffcient stud is greater than nut when stud and nut material are selected, then nut and stud high temperature can be caused to kill, and outlet pipe amount of deformation can not discharge, under causing high-temperature condition, stud is elongated, and can not seal when Tail Pipe Temperature reduces; If linear expansion coeffcient nut is greater than stud when stud and nut material are selected, then nut high temperature can be caused to loosen, cannot seal.
Summary of the invention
The purpose of this utility model is the deficiency existed for above-mentioned prior art, a kind of engine exhaust pipe is provided to compress anti-loose structure, cylinder cap is screwed in outlet pipe stud one end, one end is fixed outlet pipe by lock nut in addition, between outlet pipe and lock nut, increase a cushion cover, the side of cushion cover and upper and lower surface are coated with friction coat, and the tail end of lock nut is frustum type, frustum is slotted, and carries out mechanical predeformation at frustum afterbody relative to the neutral position of lock nut opposite side.
Described mechanical predeformation is inwardly exert pressure in the two sections that screw thread tail end periphery is relative with fixture, makes lock nut afterbody local lose circle, increases the local moment of outlet pipe stud by lock nut afterbody.
Advantage of the present utility model and beneficial effect are: by Intermediate Gray coating cushion cover, reduce the high temperature that outlet pipe reaches outlet pipe stud and lock nut, reduce the heat distortion amount of outlet pipe stud and lock nut; Reduce the friction between lock nut and gas exhaust tube flange face under high/low-temperature impact condition simultaneously, when making outlet pipe temperature distortion and between lock nut, only produce relative translational movement slippage.By the mechanical predeformation of lock nut tail end, making outlet pipe stud increasing partially over moment by during lock nut screw thread rear, prevent lock nut from getting loose in vibration processes, thus it is locking to realize outlet pipe.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is scheme of installation of the present utility model;
Fig. 3 is schematic diagram before the utility model outlet pipe lock nut machinery predeformation;
Fig. 4 is stereogram after the utility model outlet pipe lock nut machinery predeformation;
Fig. 5 is orthographic drawing after the utility model outlet pipe lock nut machinery predeformation;
In figure: shape after 1-cushion cover, 2-friction coat, 3-lock nut, 4-outlet pipe, 5-outlet pipe stud, 6-cylinder cap, 7-run-out(of thread) fluting, 8-run-out(of thread) machinery predeformation.
Embodiment
Below in conjunction with the accompanying drawing 1-5 in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not paying the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in the figure, a kind of engine exhaust pipe compresses anti-loose structure, cylinder cap 6 is screwed in outlet pipe stud 5 one end, one end is fixed outlet pipe 4 by lock nut 3 in addition, a cushion cover 1 is increased between outlet pipe 4 and lock nut 3, the side of cushion cover 1 and upper and lower surface are coated with friction coat 2, as in Figure 3-5, the tail end of lock nut 3 is frustum type, frustum is slotted, the groove of can be two with diameter be symmetric points, inwardly exert pressure in the two sections that screw thread tail end periphery is relative with fixture, lock nut 3 afterbody local is made to lose circle, increase the local moment of outlet pipe stud 5 by lock nut 3 afterbody.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (2)
1. an engine exhaust pipe compresses anti-loose structure, it is characterized in that, cylinder cap (6) is screwed in outlet pipe stud (5) one end, one end is fixed outlet pipe (4) by lock nut (3) in addition, a cushion cover (1) is increased between outlet pipe (4) and lock nut (3), the side of cushion cover (1) and upper and lower surface are coated with friction coat (2), the tail end of lock nut (3) is frustum type, frustum is slotted, and carries out mechanical predeformation at frustum afterbody relative to the neutral position of lock nut (3) opposite side.
2. a kind of engine exhaust pipe according to claim 1 compresses anti-loose structure, it is characterized in that, described mechanical predeformation is inwardly exert pressure in the two sections that screw thread tail end periphery is relative with fixture, make lock nut (3) afterbody local lose circle, increase the local moment of outlet pipe stud (5) by lock nut (3) afterbody.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568622.4U CN204877622U (en) | 2015-07-31 | 2015-07-31 | Engine exhaust pipe compresses tightly anti loosening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568622.4U CN204877622U (en) | 2015-07-31 | 2015-07-31 | Engine exhaust pipe compresses tightly anti loosening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204877622U true CN204877622U (en) | 2015-12-16 |
Family
ID=54822005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520568622.4U Active CN204877622U (en) | 2015-07-31 | 2015-07-31 | Engine exhaust pipe compresses tightly anti loosening structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204877622U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194377A (en) * | 2016-09-13 | 2016-12-07 | 奇瑞汽车股份有限公司 | The heat-insulating cushion block of exhaust manifold is installed |
-
2015
- 2015-07-31 CN CN201520568622.4U patent/CN204877622U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194377A (en) * | 2016-09-13 | 2016-12-07 | 奇瑞汽车股份有限公司 | The heat-insulating cushion block of exhaust manifold is installed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |