CN1077285C

CN1077285C - Device for detecting level of liquid

Info

Publication number: CN1077285C
Application number: CN96100251A
Authority: CN
Inventors: 西村诚司; 今野健志
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1995-04-29
Filing date: 1996-04-26
Publication date: 2002-01-02
Anticipated expiration: 2016-04-26
Also published as: FR2733587A1; TW306975B; JPH0989636A; JP3526655B2; CN1154437A; FR2733587B1

Abstract

A first cap 60 and a second cap 62 are attached to upper end parts of one pair of terminals 50, and a third cap 64 is attached to their lower parts. Intermediate parts of the terminals 50 guide a float 52 so as to be freely moved up and down. When a liquid surface 2 is lowered to a prescribed height, moving contacts 54 are connected to opened parts 56 at the terminals 50, and a switch is turned on. The first cap 60 and the second cap 62 are constituted so as to be divided. When they are fitted up and down so as to sandwich a seal member 66, the second cap 62 is coupled to an inward directed claw 51 at the terminal 50, and a claw 78 at the first cap 60 is coupled to the rear surface 84 of the second cap 62 so as to be integrated. As a result, a liquid-level detection apparatus can be assembled without insert-molding a cap. Oil level switch is manufactured easily.

Description

Liquid level sensor

The present invention relates to be applicable to the liquid level sensor of two-wheeled motor vehicle etc.

In real fair 5-13928 number, published the pasta pick-up unit of 4 two-stroke engines.This device has buoyancy body, hollow stick-like, switch block, switch block carriage, and chimeric installation portion.Buoyancy body fluctuates with liquid level, hollow stick-like is to the knee-action guiding of this buoyancy body, switch block is located at the interior knee-action along with buoyancy body of this stick-like and carries out break-make, the switch block carriage remains on desired location with this switch block, chimeric installation portion is used for installing to the switch installation portion of fluid box one side of accommodating liquid in chimeric mode, and chimeric installation portion is installed with an end of switch block carriage and stick-like.Switch block carriage and chimeric installation portion are shaped as a whole by pegging graft.

Yet, as above-mentioned conventional example, switch block carriage and the grafting of chimeric installation portion are shaped, need special mould for this reason, equipment and staff such as instrument make manufacturing cost improve.

And, the stick-like back assembled switch parts that are shaped, the switch block carriage is pegged graft to chimeric installation portion is shaped again, assembles buoyancy body then, and therefore finishing assembling procedure is not single operation, and manufacturing process is different and can not carry out continuously, thus throughput rate is low.For this reason, purpose of the present invention will address this problem exactly.

For solving above-mentioned problem, the liquid level sensor that the present invention relates to, has buoyancy body, bar-like member, switch block, switch block carriage and chimeric installation portion, buoyancy body fluctuates with liquid level, bar-like member is to the knee-action guiding of this buoyancy body, switch block is along with the knee-action of buoyancy body is connected, disconnect, the switch block carriage remains on desired location with this switch block, chimeric installation portion is used for installing to the switch installation portion of fluid box one side of accommodating liquid in chimeric mode, and chimeric installation portion is installed with an end of switch block carriage and bar-like member, switch block carriage and chimeric installation portion is dismantled and assembled engages freely, above-mentioned bar-like member is provided with the carriage of backstop in above-mentioned switch block, end has pawl under the above-mentioned chimeric installation portion, and this pawl backstop can be seized seal member in above-mentioned switch carriage on both sides by the arms between switch block carriage and the chimeric installation portion.

In addition, form bar-like member with pair of terminal, by this terminal, form and detect the series loop that liquid level is used with power supply, switch block and with dodging the indicator of representing level change of going out, in this series loop, can be provided with simultaneously to postponing indicator and dodge the delay loop that goes out.

Switch block carriage and chimeric installation portion can make its mutual dismounting engage freely as different parts, therefore switch block carriage and chimeric installation portion can be bonded into one in the assembling procedure of buoyancy body.

Therefore, can not need the grafting of existing switch block carriage and chimeric installation portion to be shaped, can when reducing manufacturing cost, boost productivity.

In addition, when engagement switch parts carriage and chimeric installation portion, between two parts, seize seal member on both sides by the arms, the installation of seal member is become be easy to, also do not need simultaneously to process at switch block carriage and chimeric installation portion one side for seal member is installed.

And, owing in the level detection loop, be provided with delay loop, so even, transition is seldom arranged because of indicator dodges the delay of going out by connection, the disconnection of instantaneous time switches such as liquid level wave inception.In addition, bar-like member is constituted with fixed contact, can make simple in structure.

Fig. 1 is from the half-sectional view of A to expression oil level switch side view.

Fig. 2 is from differing the same half-sectional view of the B of 90 degree to expression with last figure.

Fig. 3 is the vertical view of corresponding A, B direction separately.

Fig. 4 is each sectional view along the 4A of Fig. 1 Fig. 2 and 4B line.

Fig. 5 is the side view of the motor scooter rear vehicle that embodiment was suitable for.

Fig. 6 is the level detection loop of embodiment.

4 fuel tanks, 6 oil level switch, 50 terminals, 52 buoyancy aids, 54 travelling contacts, 56 extension parts, 58 indicators, 60 the 1st cover bodies, 62 the 2nd cover bodies, 64 the 3rd cover bodies, 66 seals, 68 switch installation portions

Followingly illustrate as motor scooter with a embodiment that oil level switch constituted according to drawing.Fig. 1 is from the half-sectional view (section portion be 1-1 line along Fig. 3) of A to (with reference to Fig. 2) expression oil level switch side view, and Fig. 2 is the side view (section portion is 2-2 lines along Fig. 3) from representing with half-sectional view to (with reference to Fig. 1) to the B that differ 90 degree with Figure 1A

Fig. 3 among Fig. 1 Fig. 2 separately the vertical view of oil level switch close figure, corresponding with Fig. 1 A that uses, corresponding with Fig. 2 represents with B.Fig. 4 is each sectional view along the 4A of Fig. 1 Fig. 2 and 4B line, along the section A of 4A-4A line of Fig. 1, represents with B along the section of 4B-4B line of Fig. 2.

Fig. 5 is the latter half of view of motor scooter vehicle body side that present embodiment was suitable for, and Fig. 6 is for using the level detection loop diagram of oil level switch.

At first in Fig. 5, a subtend car body rear oblique upper is arranged to the rear portion frame 2 of extending, portion is supporting fuel tank 4 in its back-end, on the installation portion described later of this fuel tank 4 oil level switch 6 is housed.。

The place ahead of fuel tank 4, the open goods-container 8 in top is being supported by rear portion frame 2, and its internal capacity is very big can accommodate the whole helmet 10, and the peristome of goods-container 8 opens and closes with seat 12.

The part that above the rear portion of goods-container 8, opens and closes by seat 12, upright lock bar 14 can be supported with freely reversing, and reversing of main support 16 can be locked.

Fuel tank 4 forms as one with the rear portion wall of goods-container 8, and accumulator 20 in the battery compartment 18 interior folding and unfoldings that extend to fuel tank 4 belows.

Below goods-container 8, swing actuating unit 24 can free unsteadily be supported in rear portion frame 2 by connecting rod 22 and be provided with pipe box at the connecting portion of connecting rod 22.

Constitute swing actuating unit 24 2 stroke cylinders 26 around cover with guard shield 28, inner with the cooling fan forced air-cooling shown in the end among the figure, its warm air draft directs into freezing preventing of gasifier 34 on every side by the wind deflector 32 that is listed in passage 30.

Passage 30 is being provided with above retreading in the crankcase side of rear portion actuating unit 24, form as be integral the part of forwards extending by front end with the wind deflector 32 of end binding thereafter, and be covered with the side of gasifier 34 from air purifier 36.

Gasifier 34 leads to leaf-valve 40 in the crankcase by sucking concetrated pipe 38.

The rear portion of actuating unit 24 connects with the rearward end of posterior bumper 42 to rear portion frame 2, and trailing wheel 44 can supported freely to rotate.

Symbol 46 is exhaust silencers, the 48th, and gas outlet.In addition, the rear vehicle between seat 12 and the actuating unit 24 is covered with bonnet 1.

As shown in Figure 6, oil level switch 6 have a pair of double parallel terminal 50 of doing bar-like member, the buoyancy body 52 made with expanded material etc. to these terminal 50 guiding, and with the switch portion of the connection of getting off on this buoyancy body 52, disconnection.

Switch portion is made of with joining with this travelling contact 54 or separating the extension part 56 that forms at the bottom of terminal 50 warpage like that the travelling contact 54 that is installed on the buoyancy body 52.

Power supplys such as terminal 50 one of this a switch portion connection accumulator, another link indicator 58 constitutes the level detection loop of series connection, and is connecting delay loop in this level detection loop.

Delay loop be by and indicator 58 capacitor C arranged side by side and constituted in the resistance R that is connected in series between they and the switch portion, along with the connection of switch portion, go out with the sudden strain of a muscle of given time constant delay open indicator 58.The suitable capacity of capacitor C is 50uF in the present embodiment.

The detailed construction of oil level switch 6 below is described.As shown in Figures 1 and 2, oil level switch 6 has the 1st cover body 60 and the 2nd cover body 62 in the upper end of pair of terminal 50, has the 3rd cover body 64 in the lower end.

These cover bodies are with pair of terminal 50 protection and when supporting at interval, and the 1st cover body 60 is chimeric installation portions, it by and the 2nd cover body 62 between the switch installation portion 68 that forms to wall portion of the seal 66 of seizing on both sides by the arms at fuel tank 4 to carry out hydraulic seal chimeric.

Be formed with the terminal hole 70 that terminal 50 is passed on the 1st cover body 60 abreast, simultaneously be formed with the flange part 72 that the upper end with switch installation portion 68 joins, and below flange part 72, be formed with and the corresponding to minor diameter part 74 in the aperture of switch installation portion 68 in upper periphery.

There is a pair of lock section 76 relatively to extend from the bottom of minor diameter part 74 downwards, is formed with inside pawl 78 at separately front end.The 2nd cover body 62 plays the function of necessary switch carriage, thereby it makes the 1st cover body 60 to the desired location of terminal 50 raising level gaging precision is installed correctly.

The size of the 2nd cover body 62 is that its relative side can enter between a pair of lock section 76, with lock section 76 superposed part are tapered portion 80 that top formation amplitude narrows down.

Above 82 contact with seal member 66, below 84 its amplitudes are spacings of a pair of lock section 76, and be formed with the recess 85 that engages with pawl 78.

In addition, be formed with the pair of terminal hole 86 corresponding with terminal hole 70, engaging groove 88 is arranged at its top, and terminal 50 is turned up the interior of formation and stretched into wherein to pawl 51.

The 3rd cover body 64 center side at an upper portion thereof is formed with the inclined-plane 90 of supporting extension part 56, is formed with the portion that pulls out 65 of hanging down single order at its sidepiece, and terminal hole 92 connects formed thereon, and also is formed with engaging groove 94 thereon.

The leading section that is folded to the extension part 56 of vertical direction again is inserted in the terminal hole 92, and the export-oriented pawl 57 that this part is turned up formation is engaged in engaging groove 94.

Buoyancy body 52 is cylinder-like parts, and its inboard has the space that terminal 50 passes, and bottom 96 is the inclined-plane parallel with extension part 56, exposes the travelling contact made from extension part parallel oblique face 54 on this inclined-plane.

Travelling contact 54 is that section is the endless member that omits L word shape, and its upstanding wall portion 55 packs in the buoyancy body 52.

Therefore, when travelling contact 54 drops to the setting height of liquid level L, along with buoyancy body 52 moving downwards, can join with extension part 56, so conducting between the pair of terminal 50, buoyancy body 52 stops moving downwards simultaneously.

Seal member 66 is held under the arm below the minor diameter part 74 of the 1st cover body 60 as shown in Figures 1 to 4 with above the 2nd cover body 62 between 82, and it is the disk-like member made from the resilient material that rubber etc. suits, and its periphery is more bigger than the circumference of above-mentioned these faces.

As shown in Figure 4, be to make hole 67 that lock section 76 sealings pass through and for the hole 69 that terminal 50 sealings are passed through forms respectively in couples, sealing make liquid not from the lock section 76 and terminal 50 around to leaking outside.

The below effect of explanation present embodiment.In Fig. 1 and Fig. 2, at first the bottom with terminal 50 is pressed into the into terminal hole 92 of the 3rd cover body 64, and export-oriented pawl 57 is engaged in engaging groove 94, installs the 3rd cover body 64 thus.

Then terminal 50 is led to the inboard of buoyancy body 52, and then, make terminal 50 again, the 1st cover body 60 and the 2nd cover body 62 are pressed on the approaching direction by terminal hole 70 by the 2nd cover body 62 and seal member 66.

So the 2nd cover body 62 is with engaging groove 88 and interiorly engage to pawl 51, and pawl 78 engages with recess 85, and the 1st cover body 60 and the 2nd cover body 62 are in aggregates thus.

At this moment, terminal 50 can not come off downwards with engaging of engaging groove 88 by pawl 51, and owing to also stoped upwards and come off at the laterally projecting teat 53 (with reference to Fig. 2,4) that is provided with of the pars intermedia of terminal 50, consequently the 1st cover body 60 is correctly located with the relative position of terminal 50.

Thereby, just finished this assembling as long as will combine as the 1st cover body 60 of chimeric installation portion and the 2nd cover body 62 separately as the switch block carriage, therefore in continuous assembling procedure, can carry out the assembling of oil level switch.

Owing to be not embed shaping with the diverse operation of existing assembling procedure content, therefore easy to manufacture significantly, production efficiency improves, and manufacturing cost reduces.

At this moment, so owing between the 1st cover body 60 and the 2nd cover body 62, seize on both sides by the arms simultaneously and fixed seal member 66 and do not need to carry out special processing the installation exercise quickening for seal member 66 is installed.

Owing in the level detection loop, be provided with delay loop,, therefore can prevent transition, even responsive LED also can use so, disconnect because the effect of delay loop does not make indicator 58 sudden strains of a muscle go out yet even do momentary connection because of switches such as liquid level wave inceptions.

And, terminal 50 is utilized as bar-like member self, can effectively utilize parts and make simple in structurely, and can suppress the increase of number of components.

In addition, the present invention is not limited to the foregoing description can various improvement shapes.For example also can be with bar-like member as fixed contact body formation in addition.

Travelling contact also can be installed in the upper end and the pars intermedia of buoyancy body.And switch block also can adopt the magnetic wire switch that is housed in the hollow bar-like member as above-mentioned conventional example.

And, use object also to be not limited to the various casees of fuel tank and all can use, all can use in the various casees of the automobile beyond 2 wheeled motorcycles etc.

Claims

1. liquid level sensor, this liquid level sensor has buoyancy body, bar-like member, switch block, switch block carriage and chimeric installation portion; Buoyancy body fluctuates with liquid level, bar-like member is to the knee-action guiding of this buoyancy body, switch block is along with the knee-action of buoyancy body is connected, disconnect, the switch block carriage remains on desired location with this switch block, chimeric installation portion is used for installing to the installation portion of fluid box one side of accommodating liquid in chimeric mode, chimeric installation portion is installed with an end of switch block carriage and bar-like member, in above-mentioned liquid level sensor, make the switch block carriage and chimeric installation portion is dismantled and assembled engages freely, it is characterized in that: this bar-like member is provided with the carriage of backstop in above-mentioned switch block, end has pawl under this chimeric installation portion, this pawl backstop has been seized seal member in above-mentioned switch block carriage on both sides by the arms between switch block carriage and chimeric installation portion.

2. the described liquid level sensor of claim 1, it is characterized by: form bar-like member with pair of terminal, by this terminal, form and detect the series loop that liquid level is used with power supply, switch block and with dodging the indicator of representing level change of going out, in this series loop, be provided with simultaneously to postponing indicator and dodge the delay loop that goes out.