CN201129248Y

CN201129248Y - Petrol engine oil box cap

Info

Publication number: CN201129248Y
Application number: CNU2007201884556U
Authority: CN
Inventors: 江伟; 罗荣; 冉沅忠; 张国繁
Original assignee: Chongqing Zongshen Technology Development and Research Co Ltd
Current assignee: Chongqing Zongshen General Power Machine Co Ltd
Priority date: 2007-12-07
Filing date: 2007-12-07
Publication date: 2008-10-08
Anticipated expiration: 2017-12-07

Abstract

The utility model relates to a fuel tank cover for closing an oil inlet of a fuel tank of a gasoline engine, which is composed of an outer cover and an inner cover. The inner cover is a cylinder with two steps, at least two through holes are opened on the end face of a first step and enable the end face to form elongated cantilevers, the end of the elongated cantilever is equipped with a boss, the internal surface of the top portion of the outer over is equipped with ribs, the internal surface of the outer cover cylinder is equipped with a limit boss, the first step of the inner cover is arranged between the internal surface of the top portion of the outer over and the limit boss, and the boss at the end of the cantilever is arranged between the ribs. The fuel tank cover can enable the screwing force between the fuel tank cover and the fuel tank port to be certain without being influenced by rotating strengths which vary among different people.

Description

The gasoline engine oil case lid

Technical field

The utility model relates to a kind of fuel tank cap that is used for enclosed gasoline machine fuel tank filler opening.

Background technique

The reservoir port of gasoline engine fuel case must seal with fuel tank cap, to guarantee that fuel oil can not flow out from the fuel tank reservoir port.At present, fuel tank cap mainly contains two kinds of structural types, a kind of for covering door bolt clamp-press type fuel tank cap, as utility model patent 200420060536.4 and 200520009771.3 disclosed fuel tank cap, this kind fuel tank cap is to comprise that lid is latched in interior fuel tank cap bottom and puts into reservoir port in use, and with the fuel tank cap half-twist, thereby the reservoir port card is pressed between lid door bolt and the fuel tank cap seal ring; Another kind is a screw thread rotary joint style fuel tank cap, and this kind fuel tank cap is screwed on the reservoir port by screw thread.

For the rotary joint style fuel tank cap, because fuel tank cap is by being threaded with reservoir port, so its dynamics of spinning will be according to the size of different operator's strength and different, it is the influence that the dynamics of spinning between fuel tank cap and the reservoir port will be subjected to the spinning force size, for the bigger operator of strength, after it is screwed in fuel tank cap on the reservoir port, the dynamics of spinning between fuel tank cap and the reservoir port will be bigger, and make the less operator of strength be difficult for fuel tank cap is screwed off from reservoir port.

The model utility content

The purpose of this utility model provides a kind of screw thread rotary joint style gasoline engine oil case lid, and making the maximum dynamics of spinning that can reach between fuel tank cap and the reservoir port is certain value, is not subjected to the influence of spinning force size.

Gasoline engine oil case lid described in the utility model is made up of enclosing cover and inner cap, and described inner cap is the cylindrical body with two steps, and first step is positioned at the inner cap upper end, and second step is positioned at the first step below, and inner cap part below second step offers outside thread; On the first step end face, offer two through holes at least, it is evenly distributed on the first step end face, each through hole makes this end face form a long strip cantilever, be provided with boss in the cantilever termination, it is positioned at the cantilever upper surface, this boss face to the one side of cantilever root and the angle between the cantilever upper surface greater than 90 °.

Be provided with rib at the cover top portion internal surface, it circumferentially is distributed in the cover top portion inner surface edge along enclosing cover, and the enclosing cover internal surface of column is provided with at least two positive stop lug boss that are located in the same horizontal plane.

The first step of inner cap between cover top portion internal surface and described positive stop lug boss, and with the enclosing cover Spielpassung, the boss of cantilever termination is between described rib.

Inner cap outside thread of offering of part below second step is used for and the spinning of reservoir port, greater than 90 °, make this face of cantilever termination boss is not vertical with cantilever upper surface inclined-plane to the boss face of cantilever termination to the one side of cantilever root and the angle between the cantilever upper surface.The first step of inner cap between cover top portion internal surface and positive stop lug boss, and with the enclosing cover Spielpassung, inner cap can be embedded in the enclosing cover, and can produce relative rotation with enclosing cover.

It is on the same circumference in the center of circle that the medial axis of described cantilever is positioned at the first step center.

The medial axis of the rib that the cover top portion internal surface is provided with is through the medial axis of enclosing cover, and the straight line that cantilever termination boss face intersects to the one side of cantilever root and cantilever upper surface is through the medial axis of inner cap.Like this when enclosing cover produce relative rotation with inner cap and the rib that makes the cover top portion internal surface and cantilever termination boss face when the one side of cantilever root contacts, be line contact but not some contact.

Be set with seal ring at the second step root, can cut open fuel tank and carry out reliable sealing.

When needs are screwed in fuel tank cap on the reservoir port, rotate the enclosing cover of fuel tank cap, then can produce the rotation of slight distance with respect to inner cap at enclosing cover originally, afterwards, because described muscle stopped by cantilever termination boss, rib will promote the boss motion of cantilever termination, rotate together thereby make enclosing cover drive inner cap.When being torqued-up to certain dynamics between inner cap and the reservoir port, if be rotated further enclosing cover, then rib will promote cantilever termination boss and make the cantilever termination produce downward distortion, because cantilever termination boss and rib surface of contact are the inclined-plane, when the cantilever termination is moved downward to certain distance, rib will be crossed cantilever termination boss and produce " skidding " phenomenon, afterwards, owing to there is not the effect of rib, the cantilever termination upsprings back, and the rib in back contacts with cantilever termination boss again, produces " skidding " phenomenon equally once more, and produce the sound of " rattling away ", prompting operation person's fuel tank cap has rotated to limit position thus.

The utility model is owing to have this kind structure, when driving the inner cap rotation by rotation fuel tank cap enclosing cover, " skidding " phenomenon can appear, enclosing cover just again can not drive inner cap and rotate, thereby the dynamics that spins between fuel tank cap and the reservoir port is no longer increased, so its maximum dynamics of spinning is a certain value, the influence of the spinning force size that is not varied with each individual.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

Fig. 1 is the main pseudosection of gasoline engine oil case lid described in the utility model;

Fig. 2 is the plan view of inner cap;

Fig. 3 is the sectional view of A-A line among Fig. 2;

Fig. 4 is the sectional view of B-B line among Fig. 2;

Fig. 5 is the main pseudosection of enclosing cover;

Fig. 6 is the worm's eye view of Fig. 5.

Embodiment

Extremely shown in Figure 6 as Fig. 1, this gasoline engine oil case lid is made up of enclosing cover 3 and inner cap 6, described inner cap 6 is for having the cylindrical body of two steps, first step 9 is positioned at inner cap 6 upper ends, second step 10 is positioned at first step 9 belows, be set with seal ring 4 at second step 10 roots, inner cap 6 offers outside thread (mode that this outside thread also can be embedded on the plastics inner cap 6 by metallic stamping pieces is made) in part below the second step 10, and seal ring 4 usefulness are fastened in the seal ring baffle ring 5 of second step 10 outside thread roots and are fixed.Offer six through holes 8 on first step 9 end faces, it is evenly distributed on first step 9 end faces, and it is on the same circumference in the center of circle that the medial axis that each through hole 8 makes this end face form 1, six cantilever 1 of a long strip cantilever is positioned at first step 9 centers.Be provided with boss 7 in cantilever 1 termination, it is positioned at cantilever 1 upper surface, and greater than 90 °, and the straight line that intersects of this face and cantilever 1 upper surface is through the medial axis of inner cap 6 towards the one side of cantilever 1 root and the angle between cantilever 1 upper surface for this boss 7.

Be provided with three groups of totally two ten seven ribs 2 in enclosing cover 3 top inner surface, three groups of ribs 2 circumferentially are evenly distributed on enclosing cover 3 top inner surface edges along enclosing cover 3, nine ribs 2 in every group of rib 2 are all equidistantly arranged, and the medial axis of enclosing cover 3 is all passed through in the medial axis of every rib 2.Enclosing cover 3 internal surface of column are provided with three positive stop lug boss 11, and it is evenly distributed on enclosing cover 3 internal surface of column and is located in the same horizontal plane.

The first step position 9 of inner cap 6 between enclosing cover 3 top inner surface and three positive stop lug boss 11, and with enclosing cover 3 Spielpassung, the boss 7 of cantilever 1 termination is all between described rib 2.

When needs are screwed in fuel tank cap on the reservoir port, rotate the enclosing cover 3 of fuel tank cap, originally enclosing cover 3 can be with respect to the rotation of inner cap 6 generation slight distance, afterwards, enclosing cover 3 will drive inner cap 6 and rotate, produce relative rotation with inner cap 6 once more to enclosing cover 3, and when producing the sound of " rattling away ", fuel tank cap just is tightened on the reservoir port.

Claims

1, a kind of gasoline engine oil case lid, be made up of enclosing cover (3) and inner cap (6), it is characterized in that: described inner cap is the cylindrical body with two steps, and first step (9) is positioned at the inner cap upper end, second step (10) is positioned at the first step below, and inner cap part below second step offers outside thread; On the first step end face, offer two through holes (8) at least, it is evenly distributed on the first step end face, each through hole makes this end face form a long strip cantilever (1), be provided with boss (7) in the cantilever termination, it is positioned at the cantilever upper surface, this boss face to the one side of cantilever root and the angle between the cantilever upper surface greater than 90 °;

Be provided with rib (2) in enclosing cover (3) top inner surface, it circumferentially is distributed in the cover top portion inner surface edge along enclosing cover, and the enclosing cover internal surface of column is provided with at least two positive stop lug boss that are located in the same horizontal plane (11);

The first step of inner cap (9) is positioned between enclosing cover (3) top inner surface and the described positive stop lug boss (11), and with the enclosing cover Spielpassung, the boss of cantilever termination (7) is positioned between the described rib (2).

2, gasoline engine oil case lid according to claim 1 is characterized in that: it is on the same circumference in the center of circle that the medial axis of described cantilever (1) is positioned at first step (9) center.

3, gasoline engine oil case lid according to claim 2, it is characterized in that: the medial axis of the rib (2) that enclosing cover (3) top inner surface is provided with is through the medial axis of enclosing cover, and the straight line that cantilever (1) termination boss (7) intersects towards the one side of cantilever root and cantilever upper surface is through the medial axis of inner cap (6).

4, gasoline engine oil case lid according to claim 1 is characterized in that: be set with seal ring (4) at second step (10) root.