CN105408220B

CN105408220B - Case lid

Info

Publication number: CN105408220B
Application number: CN201480041447.1A
Authority: CN
Inventors: 娓¤竟寤跺箍; 渡边延广
Original assignee: Yanmar Co Ltd
Current assignee: Yanmar Power Technology Co Ltd
Priority date: 2013-07-23
Filing date: 2014-03-19
Publication date: 2017-05-31
Anticipated expiration: 2034-03-19
Also published as: CN105408220A; JP6131325B2; JPWO2015011946A1; WO2015011946A1

Abstract

A kind of case lid (100), possess outer body (1) and be assemblied in the leaf spring (2) of the outer body (1), when outer body (1) is rotated, the plate portion (2P) extended from the leaf spring (2) is mobile along the rake (Ts) of case (fuel tank T) side, wherein, the leaf spring (2) is held rigidity when the outer body (1) starts to be rotated to " closing " direction and holds rigid different when the outer body (1) starts to be rotated to " opening " direction in operator.

Description

Case lid

Technical field

The present invention relates to case lid technology.

Background technology

Conventionally, there is known a kind of case lid (referring for example to patent document 1) of oil supply port for being assemblied in fuel tank.Such case Lid typically is provided with outer body and leaf spring.The housing held for operator when outer body is loading and unloading case lid, leaf spring is to be assemblied in The part of the lower section of outer body.Additionally, accommodating inside subject, packing ring etc. on the inside of outer body.

But, it is formed with leaf spring toward the plate portion for radially extending the leaf spring.On the other hand, in the oil supply port of fuel tank It is formed with rake, recess (referring for example to patent document 2).Therefore, such case lid holds outer body to " pass in operator Close " direction rotate when, plate portion along rake move, packing ring is urged to oil supply port.Additionally, recessed by being embedded in plate portion Portion, the locking mechanism that composition will not be rotated surprisingly to " opening " direction.

Like this, case lid is designed as：When being rotated to " closing " direction when case lid is in assembling, plate portion starts to withstand inclination Portion.Now, be bent because a part for plate portion has withstood rake (specifically, whole leaf spring produce twisting stress and Bending stress), produce reaction force, therefore operator to need to hold outer body with bigger power, rotated to " closing " direction. Therefore, the case lid that can be assembled with less power is sought.

Further, case lid is designed as：When being rotated to " opening " direction when case lid is in dismounting, plate portion departs from from recess.This When, it is bent that (specifically, whole leaf spring produces twisting stress and the bending should because a part for plate portion has withstood recess Power), produce reaction force, therefore operator to need to hold outer body with bigger power, rotated to " opening " direction.But, If can be dismantled with less power, the unexpected problem rotated to " opening " direction can be produced.Therefore, seeking can be with appropriateness Power dismantled, while ensuring the case lid of Guidelines for House.

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2006-76582 publications

Patent document 2：Japanese Unexamined Patent Publication 2005-104174 publications

The content of the invention

Invent problem to be solved

The purpose of the present application is to provide a kind of case lid, and it can be assembled with less power, and can be with appropriateness Power dismantled, while ensuring Guidelines for House.

The scheme for solving problem

First scheme of the invention is,

A kind of case lid, possesses：

Outer body；And

Leaf spring, is assemblied in the outer body,

When the outer body is rotated, from the plate portion that the leaf spring extends, moved along the rake of case side,

Wherein, the leaf spring holds the rigidity (bag when outer body starts to be rotated to " closing " direction in operator Containing flexural rigidity and torsion rigidity) and hold when the outer body starts to be rotated to " opening " direction rigidity (comprising bending Rigidity and torsion rigidity) it is different.

Alternative plan of the invention is, in the case lid of first scheme,

Constitute when the outer body is rotated to " closing " direction, the plate portion is moved and embedding along the rake Enter the locking mechanism of recess,

The leaf spring holds the plate portion when outer body is rotated to " closing " direction and starts to withstand institute in operator Rigidity when stating rake and hold when the outer body is rotated to " opening " direction the plate portion from the recess depart from when Rigidity it is different.

Third program of the invention is, in the case lid of alternative plan,

The leaf spring holds when the outer body is rotated to " opening " direction the plate portion from the recess in operator Rigidity during disengaging is than when holding that the plate portion starts to withstand the rake when outer body is rotated to " closing " direction Rigidity it is high.

Fourth program of the invention is, in the case lid of third program,

The leaf spring on the basis of the central dummy line for passing through the plate portion from the central point of the leaf spring to " opening " Direction is assemblied in the outer body in the position at the phase angle of regulation.

5th scheme of the invention is, in the case lid of third program,

The leaf spring is formed with inclined plane on the side long of the plate portion, the angle of depression of the angle of depression ratio " closing " side of " opening " side Greatly.

6th scheme of the invention is, in the case lid of third program,

The leaf spring is formed with inclined plane on the side long of the plate portion, bend allowance ratio " closing " side of " opening " side it is curved Qu Yuliang is long.

7th scheme of the invention is that in the case lid of the first to the 6th either a program, possess：

Inside subject, is assemblied in the inside of the outer body；And

Packing ring, is assemblied in the lower surface of the inside subject,

Resin sheet is configured between the inside subject and the packing ring.

Invention effect

The present invention obtains effect as follows.

First scheme of the invention, leaf spring is held when outer body starts to be rotated to " closing " direction in operator Rigidity with hold rigid different when outer body starts to be rotated to " opening " direction.Accordingly, it is capable to assembling moment of torsion during case lid Moment of torsion during with dismounting case lid assigns difference.Accordingly, it is capable to improve the operability of case lid.

Alternative plan of the invention, leaf spring is held plate portion when outer body is rotated to " closing " direction and is opened in operator Rigidity of beginning when withstanding rake and hold plate portion when outer body is rotated to " openings " direction from recess depart from when rigidly not Together.Accordingly, it is capable to assign difference to moment of torsion when assembling the moment of torsion and dismounting case lid during case lid.Additionally, when can ensure that dismounting case lid Guidelines for House.Accordingly, it is capable to further improve the operability of case lid.

Third program of the invention, leaf spring operator hold when outer body is rotated to " opening " direction plate portion from Rigidity when recess departs from is than holding rigid height when plate portion when outer body is rotated to " closings " direction starts to withstand rake. Accordingly, it is capable to assemble case lid with less power, and the case lid can be dismantled with the power of appropriateness, while can ensure that Guidelines for House.

Fourth program of the invention, leaf spring is being with the central dummy line for passing through plate portion from the central point of the leaf spring Benchmark is assemblied in outer body to " opening " direction in the position at the phase angle of regulation.Therefore, although be simple construction, but grasp Author hold plate portion when outer body is rotated to " opening " direction from recess depart from when rigidity than holding outer body to " closing Close " rigidity when plate portion starts to withstand rake when rotating in direction is high.

5th scheme of the invention, leaf spring is formed with inclined plane on the side long of plate portion, and the angle of depression ratio of " opening " side " is closed Close " angle of depression of side is big., although be simple construction, but operator holds plate when outer body is rotated to " opening " direction therefore Portion when recess departs from rigidity than hold outer body to " closing " direction rotate when plate portion withstand rake when it is firm Property is high.

6th scheme of the invention, leaf spring is formed with inclined plane on the side long of plate portion, the bend allowance of " opening " side Bend allowance than " closing " side is long., although be simple construction, but operator holds outer body to " opening " direction therefore Rigidity of plate portion when recess departs from withstand inclination plate portion when outer body is rotated to " closing " direction than holding during rotation Rigidity during portion is high.

7th scheme of the invention, possesses the inside subject of the inside for being assemblied in outer body and is assemblied in internal master The packing ring of the lower surface of body.And then, resin sheet is internally configured between main body and packing ring.Accordingly, it is capable to prevent case lid to " pass Closing " moment of torsion needed for direction or " opening " direction rotate is excessive.

Brief description of the drawings

Fig. 1 is the integrally-built figure of the case lid for representing present embodiment.

Fig. 2 is to represent that the oil supply port in fuel tank is assembled with the figure of the state of case lid.

Fig. 3 is the figure for being exaggerated the region Ra shown in Fig. 2.

Fig. 4 is the figure of the region Ra of the case lid for being exaggerated other embodiment.

Fig. 5 is the figure for representing leaf spring.

Fig. 6 is the figure for representing the situation after case lid is rotated to " closing " direction.

Fig. 7 is the figure for being exaggerated the region Rb shown in Fig. 6 B.

Fig. 8 is the figure for representing the situation after case lid is rotated to " opening " direction.

Fig. 9 is the figure for being exaggerated the region Rc shown in Fig. 8 B.

Figure 10 is the figure of the concrete shape for representing leaf spring.

Figure 11 is the figure of the use example for representing case lid.

Specific embodiment

Then, the implementation method invented is illustrated.

First, the overall structure to case lid 100 is briefly described.It should be noted that the technology of present invention Thought is not limited to the case lid of fuel tank, can be suitably used for all of case lid.

Fig. 1 is the integrally-built figure of the case lid 100 for representing present embodiment.Fig. 1 shows case with third angle projection Lid 100, Figure 1A is top view, and Figure 1B is side view, and Fig. 1 C are look up figure.Additionally, Fig. 2 is to represent the oil supply port in fuel tank T To is assembled with the figure of the state of case lid 100.Fig. 3 is the figure for being exaggerated the region Ra shown in Fig. 2.It should be noted that Fig. 4 is It is exaggerated the figure of the region Ra of the case lid of other embodiment.

The case lid 100 of present embodiment is the oil supply port To for being assemblied in fuel tank T, blocks the component of oil supply port To.Case Lid 100 is mainly made up of outer body 1 and leaf spring 2.Additionally, case lid 100 possesses inside subject 3 and packing ring 4.

Outer body 1 is to dismount the housing held for operator during case lid 100.In the present embodiment, outer body 1 by Resin material is formed.All plate portion 1R of outer body 1 are the parts held for operator when case lid 100 is dismounted, and separate one Fixed is interval with multiple projection 1t.Additionally, the upper plate portion 1T of outer body 1 is to block oil supply port To after being assembled with case lid 100 Part, central portion be formed as protuberance cheese.

Leaf spring 2 is the part of the lower section for being assemblied in outer body 1.In the present embodiment, leaf spring 2 is by spring steel material shape Into.The plate portion 2P of leaf spring 2 is the part of the rake Ts for touching fuel tank T sides, past to radially extend the leaf spring 2 and formed.Additionally, The plate portion 2P of leaf spring 2 is also embedded in the part (reference picture 6, Fig. 8) of the recess Td of fuel tank T sides.

Inside subject 3 is the part of the inside for being assemblied in outer body 1.In the present embodiment, inside subject 3 is by resin Material is formed.The upper surface of inside subject 3 is the part for constituting ventilation (breather) path (air flue), is formed with spiral The dividing plate 3p of shape.Additionally, the lower surface of inside subject 3 is the part for being equipped with packing ring 4, the support plate 3s of annular shape is formed with.

Packing ring 4 is the part of the lower surface for being assemblied in inside subject 3.In the present embodiment, packing ring 4 is by elastomeric material shape Into.The upper surface of packing ring 4 is formed as multiple in the way of it can ensure that surface pressing when the lower surface of inside subject 3 is pushed into Wedge-like.Additionally, the lower surface of packing ring 4 when the upper wall surface Trt of oil supply port To is pushed into the way of it can ensure that surface pressing It is again formed as multiple wedge-likes.It should be noted that as shown in Figure 4, it is also possible to internally configure resin between main body 3 and packing ring 4 Piece (such as polypropylene foil) 5.Its object is to pass through the reduction friction of resin sheet 5.Thus, can prevent case lid 100 to " closing " Moment of torsion needed for direction or " opening " direction rotate is excessive.

Then, the shape to leaf spring 2 is described in detail.

Fig. 5 is the figure for representing leaf spring 2.Fig. 5 shows leaf spring 2 with third angle projection, and Fig. 5 A are look up figure, and Fig. 5 B are sides View.It should be noted that the arrow X shown in figure represents the direction (being set to " closing " direction) rotated during assembling case lid 100. Additionally, the arrow Y shown in figure represents the direction (being set to " opening " direction) rotated during dismounting case lid 100.On the other hand, it is aftermentioned Figure 10 be the concrete shape for representing leaf spring 2 figure.Figure 10 also uses third angle projection.

Leaf spring 2 is assemblied in the lower section (reference picture 1, Fig. 2) of outer body 1 by two bolts 6.Therefore, leaf spring 2 is in operation When person holds outer body 1 and rotated, integratedly rotated with the outer body 1.Here, the pivot of leaf spring 2 is defined It is " central point C ".

The leaf spring 2 has two plate portion 2P.Plate portion 2P refers to toward the part for radially extending, i.e., toward the side away from central point C To the part for extending.Additionally, each plate portion 2P is formed as away from central point C, it is generally trapezoidal that width W narrows gradually.And And, the mutual shapes of each plate portion 2P are identical, are formed at the position that the phase difference centered on central point C is 180 °.That is, each Plate portion 2P point symmetries centered on central point C.

Additionally, each plate portion 2P is formed as more long along the side in the direction away from central point C.Therefore, will be along away from The direction of heart point C is being defined as " 2Pe while long ".Inclined plane 2PS is formed with the side 2Pe long of each plate portion 2P.Inclined plane 2PS Formed toward lower section bending relative to horizontal direction.It should be noted that angle of depression γ 1, γ 2 to inclined plane 2PS；Bend allowance B1, b2 etc., are described again afterwards.

Then, the oil supply port To of fuel tank T is briefly described using Fig. 2 and Fig. 3.

Fuel tank T is to be welded to one another the part that bending rolled steel material is formed to be made.The upper plate of fuel tank T is provided with Oil supply port To.Oil supply port To is, by circular hole of perforating, the rib Tr for assembling case lid 100 to be formed with around it.Below Rib Tr is illustrated.

In fuel tank T, rib Tr is to form a part of bending of fuel tank T.Specifically, rib Tr is by by fuel Outside wall surface Tro, the upper wall surface Trt and internal face Tri of the upper plate bending of case T are formed.Outside wall surface Tro is relative to fuel The upper plate of case T is vertical, and upper wall surface Trt is vertical relative to outside wall surface Tro.And, internal face Tri is folded into the inner side of fuel tank T, It is generallyperpendicular relative to upper wall surface Trt.That is, rib Tr is that the upper plate bending of fuel tank T is formed as into hook shape (Hook shapes Shape) component.

Rib Tr has carried out various treatment to assemble case lid 100.That is, in upper wall surface Trt and internal face Tri, office Portion is provided with breach Tn (reference picture 6, Fig. 8).Pass through its object is to the plate portion 2P when case lid 100 is dismounted for leaf spring 2.Additionally, In internal face Tri, rake Ts (reference picture 6, Fig. 8) is provided with its bottom.And, in internal face Tri, set in its bottom There is recess Td (reference picture 6, Fig. 8).Below to setting these positions the reasons why, is described in detail.

First, to being illustrated the reasons why internal face Tri sets rake Ts.

Fig. 6 is the figure for representing the situation after case lid 100 is rotated to " closing " direction.Fig. 6 A are the plate portions for representing leaf spring 2 The stereogram of 2P situations of embedded recess Td after being moved along rake Ts, Fig. 6 B are the expanded views for representing the situation.Additionally, Fig. 7 is the figure for being exaggerated the region Rb shown in Fig. 6 B.It should be noted that the arrow A shown in figure represents the shifting of plate portion 2P Dynamic direction.

As shown in Figure 6A and 6B, when being rotated to " closing " direction when case lid 100 is in assembling, plate portion 2P starts to withstand Rake Ts.Rake Ts is inclined away from the way of gradually by from upper wall surface Trt.Therefore, plate portion 2P is with one of plate portion 2P The state for having withstood rake Ts is divided to be twisted (angle beta 1 shown in reference picture 7).And, plate portion 2P is with withstanding on rake Ts and bend gradually.So, reaction force (specifically, the desired recovery of leaf spring 2 of plate portion 2P is passed through due to case lid 100 The power of original state) loaded in lower section, therefore packing ring 4 can be urged to the upper wall surface Trt of oil supply port To.That is, can closed oil supply Mouth To.

Then, to being illustrated the reasons why internal face Tri sets recess Td.

As shown in Figure 6A and 6B, when further being rotated to " closing " direction when case lid 100 is in assembling, plate portion 2P is embedding Enter recess Td.Recess Td is formed at the near top of rake Ts simplely.Therefore, plate portion 2P is will not discharge plate portion 2P The state that is contacted with the base of recess Td of reaction force ground be kept.So, because case lid 100 can not as plate portion 2P The state for moving easily, therefore the case lid 100 can be prevented unexpected to the rotation of " opening " direction.That is, locking mechanism can be constituted.

And, also exist other setting recess Td the reasons why.

Fig. 8 is the figure for representing the situation after case lid 100 is rotated to " opening " direction.Fig. 8 A are the plate portions for representing leaf spring 2 The stereogram of the situation that 2P is moved from after recess Td disengagings along rake Ts, Fig. 8 B are the expanded views for representing the situation.Additionally, Fig. 9 is the figure for being exaggerated the region Rc shown in Fig. 8 B.It should be noted that the arrow A shown in figure represents the shifting of plate portion 2P Dynamic direction.

As shown in Figure 8A and 8B, when being rotated to " opening " direction when case lid 100 is in dismounting, plate portion 2P is from recess Td Depart from.Recess Td is formed as the degree that the inclined plane 2PS of plate portion 2P is not covered all simplely.Therefore, plate portion 2P is with the plate The state that a part of portion 2P has withstood recess Td is twisted (angle beta 2 shown in reference picture 9).And, plate portion 2P is due to Withstand recess Td and be further bent.So, reaction force (specifically, the plate of plate portion 2P is passed through due to case lid 100 Spring 2 wants restorable power) loaded in lower section, therefore only can increase moment of torsion in this moment.That is, can ensure that Guidelines for House.

Present invention is illustrated below.

Moment of torsion when first scheme is to assembling case lid 100 assigns difference with moment of torsion when dismantling case lid 100, improves the case lid 100 operability.This point can suitably set the rigidity of leaf spring 2 (comprising flexural rigidity by the direction of rotation by case lid 100 And torsion rigidity) realize.It should be noted that in this case lid 100, starting to withstand inclination by suitably setting plate portion 2P Rigidity and plate portion 2P during portion Ts from recess Td depart from when rigidity realize.

Like this, in this case lid 100, leaf spring 2 is when operator holds outer body 1 and starts to be rotated to " closing " direction Rigidity with hold rigid different when outer body 1 starts to be rotated to " opening " direction.Accordingly, it is capable to assembling during case lid 100 Moment of torsion and dismounting case lid 100 when moment of torsion assign difference.Accordingly, it is capable to improve the operability of case lid 100.

Alternative plan by assuring that dismounting case lid 100 when Guidelines for House, further improve the operability of the case lid 100. This point can be realized by being arranged on during assembling case lid 100 for the recess Td of plate portion 2P insertions.It should be noted that with first Scheme is identical, in this case lid 100, suitably sets rigidity and plate portion 2P when plate portion 2P starts to withstand rake Ts from recess Rigidity when Td departs from.

Like this, in this case lid 100, leaf spring 2 holds plate portion when outer body 1 is rotated to " closing " direction in operator Rigidity when 2P starts to withstand rake Ts departs from plate portion 2P when outer body is rotated to " opening " direction is held from recess Td When rigidity it is different.Accordingly, it is capable to assign difference to moment of torsion when assembling the moment of torsion and dismounting case lid 100 during case lid 100.Additionally, Can ensure that Guidelines for House during dismounting case lid 100.Accordingly, it is capable to further improve the operability of case lid 100.

Here, this case lid 100 can be assembled with less power, while can be dismantled with the power of appropriateness, and have Ensure that Guidelines for House this feature.Therefore, illustrated to the construction of such feature can be realized.

Third program is that moment of torsion when assembling case lid 100 by making torque ratio during dismounting case lid 100 is big, so as to compared with Small power assembles the case lid 100.Additionally, case lid 100 can be dismantled with the power of appropriateness, while ensuring Guidelines for House.This point can pass through The first to third method described later is realized.

Like this, in this case lid 100, leaf spring 2 holds plate portion when outer body 1 is rotated to " opening " direction in operator Rigidity of 2P when recess Td departs from withstand rake Ts plate portion 2P when outer body 1 is rotated to " closing " direction than holding When rigidity it is high.Accordingly, it is capable to assemble case lid 100 with less power, and the case lid 100 can be dismantled with the power of appropriateness, while energy Ensure Guidelines for House.

Hereinafter, illustrated to the first method of such feature can be realized.This is equivalent to fourth program.

As described above, leaf spring 2 is assemblied in the lower section (reference picture 1, Fig. 2) of outer body 1 by two bolts 6.Each spiral shell Bolt 6 is anchored on outer body 1 via the bolt hole 2h (reference picture 5) between the central point C and plate portion 2P of leaf spring 2. This, the line of the central imagination for passing through plate portion 2P from the central point C of leaf spring 2 is defined as " dummy line L " (reference picture 5).

As shown in figure 5, the bolt hole 2h of leaf spring 2 is arranged on the basis of dummy line L to " opening " direction in the phase for specifying The position of parallactic angle α (0 °~80 °).Therefore, for side 2Pe long (specifically, the side 2Pe long from bolt hole 2h to plate portion 2P The point intersected with rake Ts, recess Td) apart from D1, D2, mathematical expression below is set up.Thus, leaf spring 2 is according to direction of rotation With different rigidity.That is, due to can to from fulcrum (equivalent to from central point C by the central straight line of bolt hole 2h) to making Difference is assigned apart from D1, D2 with point (point intersected with rake Ts, recess Td equivalent to side 2Pe long), therefore according to rotation Turning direction has different rigidity.

Mathematical expression：D1 ＜ D2

Like this, in this case lid 100, leaf spring 2 is in the central void to pass through plate portion 2P from the central point C of the leaf spring 2 On the basis of plan line L outer body 1 is assemblied in " opening " direction in the position of the phase angle [alpha] of regulation.Therefore, although be simple Construction, but operator hold plate portion 2P when outer body 1 is rotated to " opening " direction from recess Td depart from when rigid ratio hold Rigidity when plate portion 2P starts to withstand rake Ts when firmly outer body 1 is rotated to " closing " direction is high.

Specifically, as shown in Figure 10, the leaf spring 2 of present embodiment is designed as phase angle [alpha] for 60 °.Thus, possess so Leaf spring 2 case lid 100 operator to " opening " direction rotate when ratio rotated to " closing " direction when it is painstaking.And then, can be with Less power assembles case lid 100, and can dismantle the case lid 100 with the power of appropriateness, while can ensure that Guidelines for House.Need explanation It is that the value (60 °) of phase angle [alpha] is as long as meet apart from D2 than apart from D1 big relation, being not limited to this.

Then, second method is illustrated.This is equivalent to the 5th scheme.

As described above, being formed with inclined plane 2PS (reference picture 5) in the side 2Pe long of plate portion 2P.Set in opposed mode The mutual angle of depression γ 1 of each inclined plane 2PS, γ 2 are different, and mathematical expression below is set up.Thus, leaf spring 2 has according to direction of rotation There are different rigidity.That is, due to difference can be assigned by angle of depression γ 1, the difference of γ 2, pair cross-section the moment of inertia, therefore according to rotation Direction has different rigidity.

The ＜ γ 2 of mathematical expression γ 1

Like this, in this case lid 100, leaf spring 2 is formed with inclined plane 2PS in the side 2Pe long of plate portion 2P, " opening " side Angle of depression γ 2 is bigger than the angle of depression γ 1 of " closing " side.Therefore, although be simple construction, but operator hold outer body 1 to " opening " direction rotate when plate portion 2P from recess Td departs from when rigidity compare hold outer body 1 to " closing " direction rotate when plate Portion 2P starts to withstand rigidity height during rake Ts.

Specifically, as shown in Figure 10, angle of depression γ 1 is set to 45 ° by the leaf spring 2 of present embodiment, and angle of depression γ 2 is set to 60°.Thus, the case lid 100 for possessing such leaf spring 2 rotates when ratio to the rotation of " closing " direction in operator to " opening " direction When it is painstaking.And then, case lid 100 can be assembled with less power, and the case lid 100 can be dismantled with the power of appropriateness, while can ensure that Guidelines for House.It should be noted that the value (45 ° and 60 °) of angle of depression γ 1 and angle of depression γ 2 is bigger than angle of depression γ 1 as long as meeting angle of depression γ 2 This relation, is not limited to this.

Then, third method is illustrated.This is equivalent to the 6th scheme.

As described above, being formed with inclined plane 2PS (reference picture 5) in the side 2Pe long of plate portion 2P.Set in opposed mode Mutual bend allowances b1, b2 of each inclined plane 2PS are different, and mathematical expression below is set up.Thus, leaf spring 2 is according to direction of rotation With different rigidity.That is, due to difference, therefore basis can be assigned by the different pair cross-section the moment of inertias of bend allowance b1, b2 Direction of rotation has different rigidity.

Mathematical expression b1 ＜ b2

Like this, in this case lid 100, leaf spring 2 is formed with inclined plane 2PS in the side 2Pe long of plate portion 2P, " opening " side The bend allowance b1 of bend allowance b2 ratio " closing " side is long.Therefore, although be simple construction, but outside master is held in operator When body 1 is rotated to " opening " direction plate portion 2P from recess Td depart from when rigidity than holding outer body 1 to " closings " direction turn Rigidity when plate portion 2P starts to withstand rake Ts when dynamic is high.

Specifically, as shown in Figure 10, bend allowance b1 is set to 2.8mm by the leaf spring 2 of present embodiment, by bend allowance B2 is set to 3.5mm.Thus, the case lid 100 for possessing such leaf spring 2 rotates when ratio to " closing " in operator to " opening " direction Direction is painstaking when rotating.And then, case lid 100 can be assembled with less power, and the case lid 100 is dismantled with the power of appropriateness, while Can ensure that Guidelines for House.It should be noted that the value (2.8mm and 3.5mm) of bend allowance b1 and bend allowance b2 is as long as meet curved Qu Yuliang b2 this relation bigger than bend allowance b1, is not limited to this.

This case lid 100 is used in the fuel tank T (reference picture 11) of Diesel engine DE.This case lid 100 can be with less power Assembled, and can be dismantled with the power of appropriateness, while ensuring Guidelines for House.Accordingly, it is capable to improve the business of Diesel engine DE Product are worth.

Industrial applicability

The present invention can be used in case lid technology.

Description of reference numerals

100：Case lid；

1：Outer body；

2：Leaf spring；

2P：Plate portion；

2Pe：Side long；

2PS：Inclined plane；3：Inside subject；

4：Packing ring；

5：Resin sheet；

6：Bolt；

T：Fuel tank；

To：Oil supply port；

Ts：Rake；

Td：Recess；

C：Central point；

L：Dummy line；

α：Phase angle；

γ1：The angle of depression；

γ2：The angle of depression；

b1：Bend allowance；

b2：Bend allowance.

Claims

1. a kind of case lid, possesses：

Outer body；And

Leaf spring, is assemblied in the outer body,

The case lid is characterised by,

Constitute when the outer body is rotated to " closing " direction, the plate portion is moved and be embedded in recessed along the rake The locking mechanism in portion,

The leaf spring on the basis of the central dummy line for passing through the plate portion from the central point of the leaf spring to " opening " direction The outer body is assemblied in the position at the phase angle of regulation, the phase angle of the regulation is 0 ° of ＜ α≤80 °.

2. case lid according to claim 1, it is characterised in that

The leaf spring is formed with inclined plane on the side long of the plate portion, and the angle of depression of the angle of depression ratio " closing " side of " opening " side is big.

3. case lid according to claim 1, it is characterised in that

The leaf spring is formed with inclined plane on the side long of the plate portion, more than the bending of bend allowance ratio " closing " side of " opening " side Amount length.

4. case lid according to any one of claim 1 to 3, it is characterised in that possess：

Inside subject, is assemblied in the inside of the outer body；And

Packing ring, is assemblied in the lower surface of the inside subject,

Resin sheet is configured between the inside subject and the packing ring.