CN212400894U - High-pressure fuel tank cover assembly of automobile - Google Patents

Abstract

The utility model discloses an automobile high-pressure fuel tank cover assembly, which comprises an upper cover and a shell, wherein a spiral groove which is matched with an internal thread in an oil filling pipe in a spiral way is processed on the outer peripheral surface of the shell, the upper end of the shell can be rotatably sleeved and supported on a cover pressing plate, and the cover pressing plate and the upper cover are assembled in an anti-falling way; the upper cover is internally provided with a thorn disc driven by the torsion of the upper cover, the bottom surface of the thorn disc is formed with a thrust lug used for driving the shell to rotate, the shell is formed with a stress lug matched with the thrust lug, and the stress lug is an elastic lug which can enable the thorn disc and the shell to generate relative motion through elastic deformation when the torsion value reaches a set value; the spiral groove is a double-end spiral groove which is symmetrically arranged on the peripheral surface of the shell and can enable the oil tank cover to be screwed up by 90 degrees. The utility model discloses a design is screwed up to 90 degrees to unscrew the back casing and can kick-back automatically, improve and screw out efficiency, be equipped with and screw up the damage that suggestion mechanism can effectively avoid excessively hard to cause, guarantee fuel tank cap's life.

Description

High-pressure fuel tank cover assembly of automobile

Technical Field

The utility model belongs to the technical field of auto-parts and specifically relates to a fuel tank cap of car fuel tank, specifically speaking are car high pressure fuel tank lid assembly.

Background

The fuel tank is a container used for containing gasoline or diesel oil on an automobile, and in order to seal a tank opening of the fuel tank, an oil filling pipe is generally welded at the tank opening of the fuel tank in a sealing manner, and fuel oil is sealed in the fuel tank through the matching of the oil filling pipe and a fuel tank cover.

In the prior art, the cover body of the fuel tank cap is generally formed with external threads so as to be installed in a spiral sealing fit manner by utilizing the formed external threads and the internal threads in the fuel filling pipe. Since the tank cap needs to be rotated more than 360 degrees in the filler pipe, the convenience of operation is relatively poor, and the tank cap is also prone to damage due to the difficulty in grasping the degree of screwing.

Disclosure of Invention

The utility model aims to solve the technical problem that to the current situation of above-mentioned prior art, and provide convenient operation, the leakproofness is good, long service life just adopts a car high pressure fuel tank lid assembly of 90 degrees tightening structures.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the high-pressure fuel tank cover assembly of the car, including upper cover and body, process the helical groove used for cooperating with internal thread screw thread in the filler tube on the perimeteric surface of the body, the upper end of the body can be fitted and supported on the cover pressure plate rotatably, the cover pressure plate is fitted with the upper cover anticreep; the upper cover is internally provided with a thorn disc driven by the torsion of the upper cover, the bottom surface of the thorn disc is formed with a thrust lug used for driving the shell to rotate, the shell is formed with a stress lug matched with the thrust lug, and the stress lug is an elastic lug which can enable the thorn disc and the shell to generate relative motion through elastic deformation when the torsion value reaches a set value; the spiral groove is a double-end spiral groove which is symmetrically arranged on the peripheral surface of the shell and can enable the oil tank cover to be screwed up by 90 degrees.

In order to optimize the technical scheme, the specific measures adopted further comprise:

an upper concave torsion spring cavity is formed in the center of the bottom surface of the upper cover, and a torsion spring of the torsion driving ratchet plate is installed in the torsion spring cavity; the center of the top surface of the thorn disc is provided with a lower positioning column which is in sleeved fit with the lower end of the torsion spring, an upper positioning column which is in sleeved fit with the upper end of the torsion spring is formed in the cavity of the torsion spring, an upper end chuck of the torsion spring is positioned and clamped in a crack formed by the upper positioning column, and a lower end chuck of the torsion spring is positioned and clamped in a crack formed by the lower positioning column.

Two through channels within the range of 90 degrees are formed on the positioning columns below and above the thorn disc as symmetrical shafts, and two upper cover convex blocks which are clamped into the through channels in a sliding mode and used for rigidly pushing the thorn disc to rotate relative to the shell are formed on the bottom surface of the upper cover by taking the torsion spring cavities as the symmetrical shafts.

Two clearance adjusting mechanisms which are elastically abutted with the bottom surface of the upper cover and used for adjusting the axial fit clearance between the thorn disc and the upper cover are formed on the thorn disc through the symmetrical shafts, each clearance adjusting mechanism comprises an arc-shaped slot hole formed on the thorn disc and an elastic tongue piece which is arranged in the arc-shaped slot hole and the root of the elastic tongue piece is connected to one end of the arc-shaped slot hole, and an abutting convex column which is abutted with the bottom surface of the upper cover is formed on the free end of the elastic tongue piece.

The upper end of the shell is formed with an annular boss, the cover pressing plate is formed with an annular step surface which is supported and matched with the bottom surface of the annular boss, the cover pressing plate is further formed with an annular clamping groove which is used for clamping the periphery of the upper cover, an anti-falling convex buckle is arranged in the clamping groove, the lower part of the periphery of the upper cover is clamped into the clamping groove, and an anti-falling barb which is used for being outwards used for being matched with the anti-falling convex buckle in an anti-falling hook mode is formed at the bottom end of the periphery of the upper cover.

The automobile high-pressure fuel tank cover assembly is internally provided with a tightening prompting mechanism for giving out a 'click' tightening prompting sound when the fuel tank cover is tightened, and the tightening prompting mechanism comprises an inclined plane boss formed on the bottom surface of the thorn disc and an elastic sounding sheet formed on the shell and used for being matched with the inclined plane boss; the sounding sheet goes over the inclined plane boss to give out a prompt sound when the thorn disc and the shell move relatively.

The outer peripheral surface of the shell is formed with a spiral raised line for forming a double-end spiral groove, and the front end of the spiral raised line is formed with an arc-shaped guide head for enabling the internal thread on the oil filling pipe to be smoothly screwed into the double-end spiral groove.

A cover bolt component is rotationally clamped at the other end of the cover chain; the cover bolt component comprises an oil tank cover pin and a cover bolt, wherein the upper end of the oil tank cover pin is sleeved in a bolt connecting hole formed by the cover tether, and the cover bolt is inserted into the oil tank cover pin in an anti-falling mode.

A cover handle in a straight line shape for facilitating manual rotation of the upper cover is formed on the top surface of the upper cover, and a torsion spring cavity extends into the cover handle.

An O-shaped ring for sealing is sleeved on the outer peripheral surface of the shell above the double-end spiral groove.

Compared with the prior art, the utility model discloses the design has the double-end helicla flute that enables oil tank cap to realize 90 screws up on the outer peripheral face of casing, thereby makes the utility model discloses an oil tank cap is when installing to adding oil pipe, and the upper cover only needs rotatory 90 can screw up. The utility model discloses an upper cover drives the casing through thorn dish, and when torsion reached the torsion value of settlement, thorn dish can produce relative motion with the casing under the elastic deformation of atress lug to effectively solved the problem that traditional fuel tank cap is hard too violently easily causes the lid destruction. The utility model discloses still be provided with in the fuel tank cap and screw up suggestion mechanism, in order to send the sound of "clicking" when screwing up to can indicate the operator fuel tank cap to screw up. The utility model discloses a be provided with the torsional spring in the fuel tank cap, like this when the fuel tank cap is opened, the casing can be rotatory pop out rapidly automatically under the torsion effect of torsional spring to can improve fuel tank cap's the efficiency of twisting out.

The utility model discloses a design is screwed up to 90 degrees to unscrew the back casing and can kick-back automatically, improve and screw out efficiency, be equipped with and screw up the damage that suggestion mechanism can effectively avoid excessively hard to cause, guarantee fuel tank cap's life.

Drawings

Fig. 1 is an exploded view of the present invention;

fig. 2 is a schematic perspective view of the present invention;

fig. 3 is a top view of the present invention;

FIG. 4 is a sectional view in the direction A-A of FIG. 3;

fig. 5 is a partially enlarged view of the point i in fig. 4.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 5 are schematic structural views of the present invention.

Wherein the reference numerals are: the structure comprises a crack F, an upper cover 1, a torsion spring cavity 1a, an upper positioning column 1b, an upper cover convex block 11, an anti-falling barb 12, a cover handle 13, a shell 2, a double-head spiral groove 2a, a spiral convex strip 2b, an arc-shaped guide head 2c, a stress convex block 21, an annular convex boss 22, a sound sheet 23, a cover pressing plate 3, an annular step surface 31, a clamping matching groove 32, an anti-falling convex buckle 33, a thorn disc 4, a through groove channel 4a, a thrust convex block 41, a lower positioning column 42, a top connection convex column 43, an inclined plane convex block 44, a torsion spring 5, an upper end chuck 51, a lower end chuck 52, a cover chain 6, a cover bolt component 7, an oil tank cover pin 71, a cover bolt 72 and an O.

As shown in the figures 1 to 5, the utility model provides a car high pressure fuel tank cover assembly, this fuel tank cover assembly including upper cover 1 and casing 2, processing on casing 2's the outer peripheral face have be used for with add the internal thread screw complex helicla flute in the oil pipe, the fuel tank cover just can seal the mouth of pipe of adding the oil pipe through the helicla flute with the internal thread screw cooperation in adding the oil pipe like this to prevent the fuel leakage of filling. In traditional fuel tank cap's structure upper cover 1 and casing 2 all adopt rigid connection, and people can directly drive casing 2 rotatory through rotatory upper cover 1, screw up the fuel tank cap in the mouth of pipe of adding oil pipe, and rotatory at least in order to 360 degrees, and the operation is more troublesome. As shown in fig. 1, the utility model discloses an upper end shaping of casing 2 has the annular boss 22 of radial evagination, and casing 2 can rotate ground fit support on lid clamp plate 3 through annular boss 22, and the upper end of casing 2 is injectd between upper cover 1 and lid clamp plate 3 through lid clamp plate 3 anticreep, and lid clamp plate 3 then adopts buckle formula anticreep to join in marriage mutually with upper cover 1. The cover press plate 3 is a circular ring-shaped member having a central through hole, and the main body portion of the housing 2 passes through the central through hole of the cover press plate 3. An annular step surface 31 is formed in the central through hole of the cover pressing plate 3, and the annular step surface 31 is matched with the bottom surface of the annular boss 22 of the shell 2 in a positioning and supporting way so that the shell 2 and the cover pressing plate 3 can rotate relatively. With further reference to fig. 4 and 5, the cover pressing plate 3 is further formed with an annular snap-fit groove 32 for snap-fitting the periphery of the upper cover 1, an anti-release protrusion 33 is disposed in the snap-fit groove 32, the lower portion of the periphery of the upper cover 1 is snapped into the snap-fit groove 32, and the bottom end of the periphery of the upper cover 1 is formed with an anti-release barb 12 for anti-release hook-and-hook engagement with the anti-release protrusion 33. The cover pressing plate 3 and the upper cover 1 are in snap fit through the matching of the anti-falling convex buckle 33 and the anti-falling barb 12.

As shown in fig. 1 and 4, the present invention is provided with a ratchet plate 4 driven by the torque of the upper cover 1 in the upper cover 1, the bottom surface of the ratchet plate 4 is formed with a thrust projection 41 for driving the rotation of the housing 2, and the housing 2 is formed with a force-receiving projection 21 matched with the thrust projection 41. The stress lug 21 is rectangular, and the root part of the stress lug is integrally connected with the inner wall of the annular boss 22. The stress lug 21 is an elastic lug with certain elasticity, and the free end of the stress lug can enable the thrust lug 41 to cross the stress lug 21 through elastic bending deformation when the torque force applied to the barbed disk 4 by the upper cover 1 reaches a set torque force value, so that the barbed disk 4 can move relative to the shell 2, and the problem of cover damage caused by over-force during screwing of the fuel tank cover is avoided.

The utility model discloses fashioned helicla flute is different with traditional 2 fashioned helicla flutes of casing on 2 outer peripheral faces of casing, the utility model discloses a 90 screw up the structure, the design shaping has double-end helicla flute 2a on 2 outer peripheral faces of casing, utilizes double-end helicla flute 2a to realize 90 of fuel tank cap and screws up, and upper cover 1 only needs rotatory 90 degrees to screw up like this, and the orientation of handle 13 on the upper cover 1 when screwing up at every turn is unanimous, and the fuel tank cap of being convenient for dismantles, makes the operation more convenient.

In the embodiment, as shown in fig. 1, in order to facilitate manual rotation of the upper cover 1, the handle 13 is formed on the top surface of the upper cover 1, and the handle 13 is in a straight-line structure. An upwardly concave torsion spring cavity 1a is formed in the center of the bottom surface of the upper cover 1, and the torsion spring cavity 1a extends into the cover handle 13. The torsion spring cavity 1a is provided with a torsion spring 5 which drives the ratchet plate 4 to rotate by the torsion generated by the rotation of the upper cover 1. The center of the top surface of the thorn disc 4 is formed with a lower positioning column 42 which is matched with the lower end of the torsion spring 5 in a sleeving way, and an upper positioning column 1b which is matched with the upper end of the torsion spring 5 in a sleeving way is formed in the torsion spring cavity 1 a. The lower positioning column 42 and the upper positioning column 1b can prevent the torsion spring 5 from deviating, an upper end chuck 51 of the torsion spring 5 is positioned and clamped in a crack F formed by the upper positioning column 1b, and a lower end chuck 52 of the torsion spring 5 is positioned and clamped in a crack formed by the lower positioning column 42. The utility model discloses a design has torsional spring 5 among the fuel tank cap, and torsional spring 5 can open at the fuel tank cap and lose when the screw thread side effect, utilizes the torsion of its storage to force 4 reverse drive casings of thorn dish to kick-back rapidly, reaches the purpose that makes the fuel tank cap deviate from the oil pipe mouth of pipe rotation fast to improve the efficiency that the fuel tank cap was twisted out.

In the embodiment, as can be seen from fig. 1, two through channels 4a in the range of 90 ° are formed on the thorn disc 4 by taking the lower positioning columns 42 as the symmetry axes, and the through channels 4a are arc-shaped grooves in the range of 90 °. As can be seen from fig. 4, the bottom surface of the upper cover 1 is formed with two upper cover protrusions 11, which can be slidably inserted into the through channels 4a for rigidly pushing the ratchet plate 4 to rotate relative to the housing 1, by using the torsion spring cavity 1a as a symmetry axis. The upper cover projection 11 can rotate 90 degrees in the through channel 4a, when the upper cover 1 is screwed down by rotating 90 degrees, the upper cover projection 11 rotates from one end of the through channel 4a to the other end of the through channel 4a, at this time, if the upper cover 1 is screwed down continuously, the upper cover projection 11 of the upper cover 1 can rigidly push the thorn disc 4 to rotate, so that the thrust projection 41 of the thorn disc 4 can cross the stressed projection 21 of the shell 2 under the action of increased torque, and at this time, the thorn disc 4 can move relative to the shell 2.

In the embodiment, the utility model discloses a last still symmetry axis shaping of thorn dish 4 has two can and the clearance adjustment mechanism of the bottom surface elasticity looks apical grafting of upper cover 1, can adjust thorn dish 4 and 1 axial fit clearances of upper cover through clearance adjustment mechanism, guarantees that the assembly back fuel tank cap can not send the abnormal sound. The clearance adjusting mechanism comprises an arc-shaped slot hole formed on the thorn disc 4 and an elastic tongue piece which is arranged in the arc-shaped slot hole and the root part of which is connected with one end of the arc-shaped slot hole, and a top-connecting convex column 43 which is used for being connected with the bottom surface of the upper cover 1 in a top-connecting mode is formed at the free end of the elastic tongue piece. The arc-shaped slotted hole and the through channel 4a are arc-shaped holes, only the arc-shaped slotted hole is short, the arc-shaped slotted hole has the function of ensuring that the elastic tongue piece has a space for vertical deformation and movement, the elastic tongue piece is an arc-shaped piece positioned in the arc-shaped slotted hole, and the thorn disc 4 can be always in elastic jacking contact with the upper cover 1 by utilizing the elastic tongue piece and the jacking convex column 43.

In the embodiment, the utility model discloses a still be equipped with among the car high pressure fuel tank lid assembly and screw up suggestion mechanism, screw up the suggestion mechanism and can send the suggestion sound of screwing up of "clicking" when the fuel tank cap is screwed up, the user just can judge out the fuel tank lid through the sense of hearing like this and whether screw up to can avoid the fuel tank cap to damage because of excessively screwing up better. The tightening prompting mechanism of the utility model comprises an inclined plane boss 44 formed on the bottom surface of the thorn disc 4 and an elastic sounding sheet 23 formed on the shell 2 and used for matching with the inclined plane boss 44; the squealer tab 23 goes over the ramp boss 44 to make a warning sound when the ratchet plate 4 and the housing 2 move relatively.

In the embodiment, the utility model discloses a shaping has spiral sand grip 2b that is used for forming double-end helicla flute 2a on the outer peripheral face of casing 2, and spiral sand grip 2 b's front end shaping has and is arranged in making the smooth spiral shell of internal thread on the oil pipe go into arc guide 2c in double-end helicla flute 2 a.

In the embodiment, a cover chain 6 is rotatably sleeved on the outer peripheral surface of the upper cover 1, and the other end of the cover chain 6 is rotatably clamped with a cover bolt component 7; the cover latch assembly 7 includes a tank cover pin 71 having an upper end fitted in a latch coupling hole formed in the cover tether 6, and a cover latch 72 detachably inserted in the tank cover pin 71. The cover chain 6 can rotate freely around the upper cover 1, and the tether of the cover chain 6 adopts a wave shape, can effectively stretch and retract, and achieves an ideal state.

In the embodiment, a sealing ring assembling groove is formed on the outer peripheral surface of the shell 2, the sealing ring assembling groove is positioned above the double-end spiral groove 2a, and an O-shaped ring 8 for sealing is sleeved in the sealing ring assembling groove.

The utility model discloses a main technical index does:

(1) mounting moment: 1.0-2.3 N.m.

(2) When the pressure is less than or equal to 30Kpa, no leakage phenomenon occurs.

(3) The fuel leakage rate of the fuel tank cover is measured in the leakage detection, the fuel leakage rate is less than or equal to 60ml/min under the condition of 7500pa, a pressure loss test has a space of about 1L at the top of the liquid level, the initial pressure is 7000pa, and the pressure loss is less than or equal to 1500pa in 10 s.

(4) Leak-proof property: when the assembly is immersed in water and pressurized to 30Kpa, no leakage can occur within 15S.

(5) Oil resistance: the sample is put into the mixed solution of fuel C, 85 percent of fuel C, 5 percent of MEOH and 10 percent of ETOH at the temperature of (40 +/-5) DEG C for soaking for 168 hours respectively, and the performance and the appearance of the sample meet the requirements.

(6) The evaporative emission of the fuel tank cap is less than or equal to 10 mg/test.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims (10)

1. Car high pressure fuel tank lid assembly, including upper cover (1) and casing (2), the outer peripheral face of casing (2) on process be used for with add the internal thread spiral complex helicla flute in the oil pipe, characterized by: the upper end of the shell (2) can be rotatably supported on the cover pressing plate (3) in a sleeved mode, and the cover pressing plate (3) is assembled with the upper cover (1) in an anti-falling mode; the ratchet plate (4) driven by the torsion of the upper cover (1) is arranged in the upper cover (1), a thrust lug (41) used for driving the shell (2) to rotate is formed on the bottom surface of the ratchet plate (4), a stress lug (21) matched with the thrust lug (41) is formed in the shell (2), and the stress lug (21) is an elastic lug which can enable the ratchet plate (4) and the shell (2) to generate relative movement through elastic deformation when the torsion value reaches a set value; the spiral groove is a double-end spiral groove (2a) which is symmetrically arranged on the peripheral surface of the shell (2) and can enable the oil tank cover to be screwed up for 90 degrees.

2. The automotive high pressure fuel cap assembly of claim 1, wherein: a concave torsion spring cavity (1a) is formed in the center of the bottom surface of the upper cover (1), and a torsion spring (5) for driving the ratchet plate (4) through torsion is installed in the torsion spring cavity (1 a); the top surface center of thorn dish (4) form have with the lower extreme suit complex lower reference column (42) of torsional spring (5), torsional spring chamber (1a) in form have with the upper end suit complex upper reference column (1b) of torsional spring (5), the upper end dop (51) location centre gripping of torsional spring (5) in last reference column (1b) fashioned crack (F), the lower extreme dop (52) location centre gripping of torsional spring (5) in the fashioned crack of lower reference column (42).

3. The automotive high pressure fuel cap assembly of claim 2, wherein: two through channels (4a) within the range of 90 degrees are formed on the thorn disc (4) by taking the positioning columns (42) below the thorn disc as symmetrical axes, and two upper cover convex blocks (11) which are clamped into the through channels (4a) in a sliding mode and used for rigidly pushing the thorn disc (4) to rotate relative to the shell (2) are formed on the bottom surface of the upper cover (1) by taking the torsion spring cavities (1a) as symmetrical axes.

4. The automotive high pressure fuel cap assembly of claim 3, wherein: two clearance adjusting mechanisms which are elastically abutted with the bottom surface of the upper cover (1) and used for adjusting the axial fit clearance between the thorn disc (4) and the upper cover (1) are formed on the thorn disc (4) through a symmetrical shaft, each clearance adjusting mechanism comprises an arc-shaped groove hole formed on the thorn disc (4) and an elastic tongue piece which is arranged in the arc-shaped groove hole and the root of the elastic tongue piece is connected to one end of the arc-shaped groove hole, and an abutting convex column (43) which is abutted with the bottom surface of the upper cover (1) is formed on the free end of the elastic tongue piece.

5. The automotive high pressure fuel cap assembly as set forth in claim 4, wherein: the upper end shaping of casing (2) have annular boss (22), cover clamp plate (3) on the shaping have with the bottom surface of this annular boss (22) support matched with annular step face (31) to this cover clamp plate (3) on still the shaping have annular card joining in marriage groove (32) that the periphery that is used for making upper cover (1) is gone into, card joining in marriage groove (32) in be provided with anticreep protruding knot (33), the peripheral lower part card of upper cover (1) in joining in marriage groove (32) to the peripheral bottom shaping of upper cover (1) has the direction outwards to be used for with this anticreep protruding knot (33) anticreep complex anticreep hook anti-off barb (12).

6. The automotive high pressure fuel cap assembly of claim 5, wherein: the automobile high-pressure fuel tank cover assembly is internally provided with a tightening prompting mechanism for giving out a 'click' tightening prompting sound when the fuel tank cover is tightened, and the tightening prompting mechanism comprises an inclined plane boss (44) formed on the bottom surface of the thorn disc (4) and an elastic sounding sheet (23) formed on the shell (2) and used for being matched with the inclined plane boss (44); the sounding sheet (23) generates a prompt sound when passing through the inclined plane boss (44) when the thorn disc (4) and the shell (2) move relatively.

7. The automotive high pressure fuel cap assembly as set forth in claim 6, wherein: the outer peripheral face of casing (2) on the shaping have spiral sand grip (2b) that are used for forming double-end helicla flute (2a), the front end shaping of spiral sand grip (2b) have and be arranged in making the smooth spiral shell of internal thread on the oil pipe go into arc guide head (2c) in double-end helicla flute (2 a).

8. The automotive high pressure fuel cap assembly of claim 7, wherein: a cover bolt component (7) is rotationally clamped at the other end of the cover tether (6); the cover bolt component (7) comprises an oil tank cover pin (71) the upper end of which is sleeved in a bolt connecting hole formed by the cover tether (6) and a cover bolt (72) which is inserted into the oil tank cover pin (71) in a falling-off prevention manner.

9. The automotive high pressure fuel cap assembly of claim 8, wherein: the top surface of upper cover (1) on the shaping have a font be used for making things convenient for manual rotatory upper cover (1) lid handle (13), torsional spring chamber (1a) extend and cover in handle (13).

10. The automotive high pressure fuel cap assembly as set forth in claim 9, wherein: an O-shaped ring (8) with a sealing function is sleeved on the outer peripheral surface of the shell (2) and positioned above the double-end spiral groove (2 a).

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