CN114312653A - Initiator of automobile engine hood - Google Patents
Initiator of automobile engine hood Download PDFInfo
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- CN114312653A CN114312653A CN202111564513.1A CN202111564513A CN114312653A CN 114312653 A CN114312653 A CN 114312653A CN 202111564513 A CN202111564513 A CN 202111564513A CN 114312653 A CN114312653 A CN 114312653A
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- sleeve
- piston rod
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- sleeve pipe
- initiator
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Abstract
The application provides an initiator of automobile engine hood belongs to the technical field of car to pedestrian's protection, specifically includes sleeve pipe, piston rod and generator, the generator is fixed sleeve pipe bottom, the piston rod is located in the sleeve pipe, the sleeve pipe top is equipped with the export, the generator actuation, the drive the piston rod is followed the exit is ejecting, the sleeve pipe is close to be equipped with on the body of export to the sunken annular of sleeve pipe inboard, be equipped with the card cover on the annular the inserts in the annular periphery, the cyclic annular protruding process of piston rod bottom during the annular, with annular and/or inserts interact reduces the piston rod is ejecting sleeve pipe energy. Through the processing scheme of this application, reduce the kinetic energy when piston rod flies out the sleeve pipe.
Description
Technical Field
The application relates to the field of pedestrian protection by automobiles, in particular to an initiator of an automobile engine hood.
Background
The initiator of the automobile engine hood is arranged on a metal plate of an automobile body of an engine cabin, and can jack up the hinge of the engine hood to enable the rear end of the engine hood to rise to a certain height at the moment of collision between a pedestrian and a motor vehicle, so that the head of the pedestrian has a certain crumpling space when impacting the engine hood, and the pedestrian is protected.
In the existing initiator, if MGG (gunpowder of NA251 is more than 275 mg) with large explosive amount is adopted, the structure strength is insufficient because only R angle limit energy is arranged at the top part in the pipe, and the inner piston rod is easy to fly out of the pipe body due to strong pressure generated after the MGG is ignited. Particularly, when the detonator is in a fire disaster in the storage and transportation processes, the piston rod flies out of the tube body after the detonator is accidentally ignited, so that personnel injury or property loss is easily caused.
Disclosure of Invention
In view of this, the present application provides an initiator for an automobile engine hood, which solves the problems in the prior art and reduces the kinetic energy of a piston rod when the piston rod flies out of a sleeve.
The initiator of the automobile engine hood adopts the following technical scheme that:
the utility model provides an initiator of automobile engine hood, includes sleeve pipe, piston rod and generator, the generator is fixed sleeve pipe bottom, the piston rod is located in the sleeve pipe, the sleeve pipe top is equipped with the export, the generator actuation, the drive the piston rod is followed the exit is ejecting, the sleeve pipe is close to be equipped with on the body of export to the annular that the sleeve pipe inboard is sunken, be equipped with the card cover on the annular the inserts in the annular periphery, the cyclic annular arch of piston rod bottom passes through during the annular, with annular and/or inserts interact reduces the piston rod is ejecting sleeve pipe energy.
Optionally, the sleeve is fixed on the sleeve, the sleeve is of a rigid structure, and the inner wall of the sleeve abuts against the insert and the outer wall of the sleeve.
Optionally, the top of the sleeve is narrowed to form a through hole and the through hole is sleeved on the top of the sleeve, and the diameter of the through hole is larger than or equal to that of the outlet.
Optionally, the piston rod further comprises a dustproof cap, the dustproof cap is fixed on the sleeve and seals the top end of the through hole, at least part of the dustproof cap is embedded into the through hole, and an embedding groove for embedding the top of the piston rod is formed in the bottom of the dustproof cap.
Optionally, the dustproof cap is in be equipped with ring groove and annular lug in the outer wall circumference of caulking groove, the piston rod embedding during the caulking groove, the edge of export and/or through-hole passes through slide in behind the annular lug in the ring groove, just dustproof cap with sleeve, piston rod and sleeve pipe interference fit.
Optionally, the detonator connecting structure further comprises a mounting bracket, the mounting bracket comprises a connecting portion and a flange portion, the connecting portion is sleeved on and fixed to the sleeve, the flange portion extends from the connecting portion to the outer side of the sleeve and is used for connecting the detonator with a vehicle body, and the inner wall of the connecting portion abuts against the insert and the outer wall of the sleeve.
Optionally, the flange portion is flush with the top of the sleeve.
Optionally, the insert is a rigid split snap ring.
Optionally, the cross-section of split snap ring is the rectangle, the interior contour surface of the longer limit of split snap ring laminates the diapire of annular.
Optionally, the insert is a plurality of balls surrounding the ring groove.
To sum up, the application comprises the following beneficial technical effects:
1. when the annular bulge at the bottom of the piston rod passes through the annular groove, the annular bulge interacts with the annular groove and/or the insert, so that the energy of the piston rod for ejecting out the sleeve is reduced, the kinetic energy of the piston rod is reduced, and the speed of the bottom of the piston rod reaching an outlet position is reduced;
2. the inner wall of the sleeve is abutted against the insert and the outer wall of the sleeve, when the bottom of the piston rod passes through the annular groove, the insert transmits the acting force of the bottom of the piston rod on the annular groove to the sleeve, the sleeve is restrained to the sleeve to prevent the annular groove of the sleeve from expanding outwards, a large amount of energy of the piston rod can be consumed, the kinetic energy of the piston rod is further reduced, and the speed of the piston rod reaching an outlet position from the bottom is reduced;
3. the connecting part of the mounting bracket replaces an independently arranged sleeve to restrain the sleeve, and parts of the detonator are reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of the construction of one embodiment of the initiator of the present application;
FIG. 2 is a schematic view of the detailed structure of the top of the present casing;
FIG. 3 is a schematic view of the insert of the present application being a ball;
FIG. 4 is a schematic structural view of a snap ring according to the present application;
FIG. 5 is a schematic structural view of another embodiment of the initiator of the present application;
fig. 6 is a detailed structural view of the mounting bracket positioned on top of the sleeve.
Description of reference numerals: 1. a dust cap; 11. an annular neck; 12. an annular projection; 2. a piston rod; 3. a bushing; 4. a sleeve; 41. an outlet; 42. a ring groove; 5. a split snap ring; 51. a ball; 6. a sleeve; 63. a through hole; 7. mounting a bracket; 71. a flange portion; 72. a connecting portion; 8. an insert; 9. caulking grooves; 10. a generator.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides an initiator of an automobile engine hood.
As shown in fig. 1 to 4, an initiator for a hood of an automobile comprises a sleeve 4, a piston rod 2 and a generator 10, wherein the generator 10 is fixed at the bottom of the sleeve 4, the piston rod 2 is positioned in the sleeve 4, an outlet 41 is arranged at the top of the sleeve 4, in the embodiment of the application, the distance between the ring groove 42 and the outlet 41 of the pipe is 7-10mm, the generator 10 is actuated to drive the piston rod 2 to eject out from the outlet 41, the ring groove 42 which is sunken towards the inner side of the sleeve 4 is arranged on the pipe body of the sleeve 4 which is close to the outlet 41, the ring groove 42 is provided with an insert 8 which is clamped and sleeved on the periphery of the ring groove 42, when the annular bulge at the bottom of the piston rod 2 passes through the ring groove 42, and the energy of the piston rod 2 ejected out of the sleeve 4 is reduced by interaction with the annular groove 42 and/or the insert 8, the kinetic energy of the piston rod 2 is reduced, and the speed of the bottom of the piston rod 2 reaching the position of the outlet 41 is reduced, but the speed of the piston rod 2 at the early stage of the ejection process is not influenced.
The detonator also comprises a sleeve 6 fixed on the sleeve 4, the sleeve 6 is of a rigid structure, the inner wall of the sleeve 6 is abutted to the insert 8 and the outer wall of the sleeve 4, and the sleeve 6 is welded on the outer wall of the sleeve 4. When the bottom of the piston rod 2 passes through the ring groove 42, the insert 8 transfers the acting force of the bottom of the piston rod 2 to the ring groove 42 to the sleeve 6, the sleeve 6 restrains the sleeve 4 to prevent the ring groove 42 of the sleeve 4 from expanding outwards, a large amount of energy of the piston rod 2 can be consumed, the kinetic energy of the piston rod 2 is further reduced, and the speed of the piston rod 2 reaching the position of the outlet 41 from the bottom is reduced.
As shown in FIGS. 2 and 3, the top of the sleeve 6 is narrowed to form a through hole 63 and is sleeved on the top of the sleeve 4, and the diameter of the through hole 63 is larger than or equal to that of the outlet 41 of the sleeve 4. The dust cap 1 is fixed on the sleeve 6 and closes the top end of the through hole 63. The top of the sleeve 6 is narrowed to enhance the strength of the top of the whole initiator, so that larger explosive amount can be matched; the bottom of the sleeve 6 extends to 8-15cm below the ring groove 42. The dustproof cap 1 is at least partially embedded into the through hole 63 and enters the top of the sleeve 4, the bottom of the dustproof cap 1 is provided with an embedded groove 9 for embedding the top of the piston rod 2, and a guiding effect is provided for the piston rod 2 in the ejection process of the piston rod 2. The outer wall of caulking groove 9 is equipped with ring groove 11 and annular lug 12 on the circumference, and when dustproof cap 1 was inserted, inside 2 tops of piston rod embedded caulking groove 9, export 41 and/or through-hole 73 profile edge warp annular lug 12 slided in the ring groove 11, dustproof cap and sleeve pipe interference fit, the dustproof cap and the peripheral part interference fit of caulking groove 9 part improve the leakproofness of detonator.
The lower part of the ring groove 42 in the sleeve 4 is also provided with a lining 3, and the lining 3 is made of rubber and is sleeved on the periphery of the piston rod 2. After the generator 10 is ignited, the piston rod 2 is moved upwards by strong pressure, and during the movement, the bottom of the piston rod 2 forces the bush 3 to move upwards, when the bush 3 moves to the top of the pipe, the bush 3 first meets the resistance of the ring groove 42, and because the bush 3 is a rubber part, a part of the rubber part can be squeezed into the gap between the ring groove 42 and the piston rod 2, and the energy of a part of the piston rod 2 is absorbed.
The initiator further comprises a mounting bracket 7, the mounting bracket 7 comprises a connecting portion 72 and a flange portion 71, the connecting portion 72 is sleeved on and fixed to the sleeve 4, the flange portion 71 extends from the connecting portion 72 to the outer side of the sleeve 4 and is used for connecting the initiator to a vehicle body, in the embodiment, the mounting bracket 7 is located in the middle of the sleeve 4, and the mounting bracket 7 and the sleeve 6 are arranged independently.
The insert 8 is a rigid split snap ring 5. The material of the snap ring 5 is SUS304, which can bear 1180 ℃ welding high temperature without deformation. The opening is an opening gap of about 1-2 mm.
The snap ring 5 is clamped on the ring groove 42, the cross section of the snap ring 5 can be circular, and the cross section of the ring groove 42 is semicircular.
The section of the snap ring 5 can also be rectangular, correspondingly, the section of the ring groove 42 can be trapezoidal or rectangular, and when the section of the ring groove 42 is trapezoidal, the trapezoidal shape is contracted from the outside of the sleeve 4 to the inner ring groove. The longer side inner contour surface of the snap ring 5 conforms to the bottom wall of the ring groove 42. When the cross section of the ring groove 42 may be trapezoidal or rectangular, the insert 8 may be formed by overlapping a plurality of snap rings 5. And the trapezoidal ring groove 42 can be varied in width to accommodate a wider split snap ring 5.
The insert 8 may also be a plurality of beads 51 that surround the annular groove 42.
In another embodiment, as shown in fig. 5 and 6, the inner wall of the connecting portion 72 abuts the insert 8 and the outer wall of the sleeve 4. The connecting portion 72 plays the same role as the sleeve 6 in the previous embodiment, and the connecting portion 72 restrains the annular groove 42 of the sleeve 4, so that the annular groove 42 of the sleeve 4 is prevented from expanding outwards, a large amount of energy of the piston rod 2 can be consumed, the kinetic energy of the piston rod 2 is further reduced, and the condition that the piston rod 2 flies out with larger kinetic energy is improved. The connecting part 72 of the mounting bracket 7 is used for restraining the ring groove 42 part, so that the sleeve 6 part is not required to be added, and the cost is saved. The embodiment is suitable for arrangement of the initiator mounting table board with a small gap with the hinge.
The flange portion 71 is flush with the top of the sleeve 4. The dust cap 1 is made of RE42EPT material and is stuck on the flange of the mounting bracket 7 through high temperature resistant glue.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an initiator of automobile engine hood, includes sleeve pipe, piston rod and generator, the generator is fixed sleeve pipe bottom, the piston rod is located in the sleeve pipe, the sleeve pipe top is equipped with the export, the generator actuation, the drive the piston rod is followed the exit is ejecting, its characterized in that, the sleeve pipe is close to be equipped with on the body of export to the annular that the sleeve pipe inboard is sunken, be equipped with the card cover on the annular insert in the annular periphery, the annular arch process of piston rod bottom during the annular, with the annular and/or insert interact reduces the piston rod is ejecting sleeve pipe energy.
2. The assembly of claim 1 further comprising a sleeve secured to said sleeve, said sleeve being of rigid construction, said sleeve inner wall abutting said insert and sleeve outer wall.
3. The device of claim 2, wherein the top of the sleeve narrows to form a through hole and fits over the top of the sleeve, the through hole having a diameter greater than or equal to the diameter of the outlet.
4. The anti-dust piston rod of claim 3, further comprising a dust cap fixed on the sleeve to close the top end of the through hole, wherein the dust cap is at least partially embedded in the through hole, and a caulking groove for embedding the top of the piston rod is formed in the bottom of the dust cap.
5. The dustproof cap according to claim 4, wherein an annular clamping groove and an annular protruding block are arranged on the circumferential direction of the outer wall of the caulking groove, when the piston rod is embedded into the caulking groove, the edge of the outlet and/or the through hole passes through the annular protruding block and then slides into the annular clamping groove, and the dustproof cap is in interference fit with the sleeve, the piston rod and the sleeve.
6. The initiator assembly of claim 1 further comprising a mounting bracket including a connecting portion sleeved and secured on the sleeve and a flange portion extending from the connecting portion to an outer side of the sleeve for attachment of the initiator to a vehicle body, the inner wall of the connecting portion abutting the insert and the outer wall of the sleeve.
7. The initiator for an automobile hood according to claim 6, wherein the flange portion is flush with the top of the sleeve.
8. The initiator for the hood of an automobile according to any one of claims 1 to 7, wherein the insert is a rigid snap ring.
9. The initiator for an automobile hood according to claim 8, wherein the snap ring has a rectangular cross section, and a longer inner contour surface of the snap ring fits against a bottom wall of the ring groove.
10. The initiator for the hood of an automobile according to any one of claims 2 to 7, wherein the insert is a plurality of balls surrounding the ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111564513.1A CN114312653B (en) | 2021-12-20 | 2021-12-20 | Primer for automobile engine cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111564513.1A CN114312653B (en) | 2021-12-20 | 2021-12-20 | Primer for automobile engine cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114312653A true CN114312653A (en) | 2022-04-12 |
| CN114312653B CN114312653B (en) | 2023-05-05 |
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ID=81052739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111564513.1A Active CN114312653B (en) | 2021-12-20 | 2021-12-20 | Primer for automobile engine cover |
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| Country | Link |
|---|---|
| CN (1) | CN114312653B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150175496A1 (en) * | 2012-07-13 | 2015-06-25 | Takata Corporation | Gas pressure actuator and method of assembling the same |
| CN105307908A (en) * | 2013-05-15 | 2016-02-03 | Tk控股公司 | Locking mechanism for pedestrian hood lifters |
| CN105793144A (en) * | 2014-01-16 | 2016-07-20 | 丰田自动车株式会社 | Vehicle pop-up hood device |
| US20170282849A1 (en) * | 2016-03-30 | 2017-10-05 | Toyoda Gosei Co., Ltd. | Actuator |
| AT522245A4 (en) * | 2019-07-26 | 2020-09-15 | Hirtenberger Automotive Safety Gmbh & Co Kg | Actuator, in particular for raising hoods |
| CN213838195U (en) * | 2020-09-11 | 2021-07-30 | 宁波均胜汽车安全系统有限公司 | Engine hood jacking device |
-
2021
- 2021-12-20 CN CN202111564513.1A patent/CN114312653B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150175496A1 (en) * | 2012-07-13 | 2015-06-25 | Takata Corporation | Gas pressure actuator and method of assembling the same |
| CN105307908A (en) * | 2013-05-15 | 2016-02-03 | Tk控股公司 | Locking mechanism for pedestrian hood lifters |
| CN105793144A (en) * | 2014-01-16 | 2016-07-20 | 丰田自动车株式会社 | Vehicle pop-up hood device |
| US20170282849A1 (en) * | 2016-03-30 | 2017-10-05 | Toyoda Gosei Co., Ltd. | Actuator |
| AT522245A4 (en) * | 2019-07-26 | 2020-09-15 | Hirtenberger Automotive Safety Gmbh & Co Kg | Actuator, in particular for raising hoods |
| CN213838195U (en) * | 2020-09-11 | 2021-07-30 | 宁波均胜汽车安全系统有限公司 | Engine hood jacking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114312653B (en) | 2023-05-05 |
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