CN103318015A - Fuel tank for forklift - Google Patents
Fuel tank for forklift Download PDFInfo
- Publication number
- CN103318015A CN103318015A CN201310227570XA CN201310227570A CN103318015A CN 103318015 A CN103318015 A CN 103318015A CN 201310227570X A CN201310227570X A CN 201310227570XA CN 201310227570 A CN201310227570 A CN 201310227570A CN 103318015 A CN103318015 A CN 103318015A
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- fuel tank
- rubber pad
- tank
- lid
- spring
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention relates to a fuel tank for a forklift. Pressure in the fuel tank is always kept in a safety range to ensure the sealing performance of the fuel tank, accurate fuel inlet pressure and normal and safe work of the forklift. The technical scheme is that the fuel tank for the forklift comprises a tank body, a tank cover assembly and a tank cover, wherein the tank cover assembly and the tank cover are respectively installed on the tank body in a sealing mode. The fuel tank is characterized in that the tank cover comprises a hollow cover body in threaded sealing connection with the tank body, a blank cap is coaxially fixed in the cover body, an upper spring, an annular sealing disc and an annular rubber pad are coaxially and sequentially installed under the blank cap from top to bottom, and the lower end face of the annular rubber pad is in sealed contact with an inner wall of the cover body under the effect of the upper spring. A disc-shaped safety valve and a lower spring are sequentially and coaxially arranged under the rubber pad from top to bottom, the lower end of the lower spring abuts against the inner wall of the cover body to achieve limitation, and the upper end of the lower spring abuts against the lower surface of the safety valve to achieve sealed contact between the lower surface and the lower end face of the rubber pad.
Description
Technical field
The present invention relates to fuel tank, particularly a kind of fork truck fuel tank mainly is applicable to the fork truck take combustion engine as power and satisfies North America market to the safety requirements of fuel tank.
Background technology
Fuel tank is the container that fork truck is stored fuel, mainly is comprised of casing, fuel tank locking cap, fuel tank locking cap board component etc.When fork truck by jolting road surface or be subject to sharp impacts when fuel tank, meeting produces oil gas in the fuel tank, pressure sharply raises, oil gas can ooze out along with fuel lid, fuel tank locking cap board component and casing connecting portion, and car body surface can leave oil stain affects presentation quality, has simultaneously serious potential safety hazard.North America market has strict requirement to the fuel tank of fork truck: fuel tank must be kept certain pressure, range of pressure can be set on request in-0.7kPa ~ 24.5kPa(force value), guarantee the accurate input pressure of fuel charger (can not block because of temperature traverse and fuel lid and cause pressure transient), guarantee simultaneously the cleanliness level (dust can not enter in the fuel tank from fuel lid) of fuel tank.The fuel tank design leak tightness of at present domestic diesel fork lift truck is unreliable, fuel tank locking cap does not have two-way valve, causes pressure and barometric pressure in the fuel tank basically identical, can't the satisfying the market requirement.
Summary of the invention
The technical problem to be solved in the present invention is: the problem for above-mentioned existence provides a kind of fork truck fuel tank, and tank pressure is maintained in the safe range all the time, with leak tightness and the accurate input pressure that guarantees fuel tank, guarantees the work of the normal safety of fork truck.
The technical solution adopted in the present invention is: the fork truck fuel tank, comprise casing, and be seal-installed on respectively case lid assembly and case lid on this casing, it is characterized in that: described case lid comprises the hollow lid that is connected with the casing thread seal, the coaxial stifle that is fixed with in this lid, this stifle below is coaxial spring, ring seal dish and the ring-shaped rubber pad installed successively from top to bottom, and wherein the rubber pad lower surface contacts with the lid inner wall sealing under the upper spring effect; Described rubber pad below is coaxial disc safety valve and the lower spring of being provided with successively from top to bottom, and wherein the lower spring lower end is withstood the lid inwall and realized spacingly, and the upper end is withstood the safety valve lower surface and contacted to realize its sealing with the rubber pad lower surface.
Described safety valve up and down on two end faces respectively one be shaped with guidepost and spring fitting post, wherein the guidepost centre hole that passes seal disc and rubber pad forms free-running fit, the lower spring coaxial sleeve is located at outside the spring fitting post.
Described lid comprises the housing with casing screw thread coupling, and coaxial sleeve is located at the outer seal ring of this housing, its middle shell upper surface is equipped with successively from bottom to top and can rotates together, also can drive linkage piece, rotor wheel and the case that housing rotates, and by buckle structure coaxial sleeve is installed on this case and is located at the outer retainer of housing; Described housing upper surface vertically is shaped with a circle flange, all is processed with the inclined-plane that one day, the housing tightening direction tilted on each flange, is processed with the groove that a circle and flange are complementary on the linkage piece.
Be connected with a tethers on the described case.
Described case lid assembly comprises cover plate, runs through the oil suction pipe and the oil return pipe that are fixed on this cover plate, and is installed on the fuel-quantity transducer on this cover plate, and wherein the oil suction pipe bottom welding has carriage, and the oil pump that is communicated with oil suction pipe is installed on this carriage; Described fuel-quantity transducer and oil pump are connected to the external control unit by fuel-quantity transducer wire harness and oil pump harness respectively.
The invention has the beneficial effects as follows: 1, the present invention is equipped with a safety valve in the lid of case lid, when tank pressure during less than-0.7kPa the safety valve of fuel lid open, air enters fuel tank, when tank pressure during greater than+24.5kPa the fuel lid safety valve open, discharge oil gas so that tank pressure maintain all the time-0.7kPa ~+the 24.5kPa scope in, thereby guaranteed leak tightness and the accurate input pressure of fuel tank, avoid oil leakage phenomenon, guaranteed the work of the normal safety of fork truck.2, the housing upper surface vertically is shaped with a circle flange, all be processed with the inclined-plane that one day, the housing tightening direction tilted on each flange, be processed with the groove that a circle and flange are complementary on the linkage piece, when screwing force surpasses a certain critical value, housing can not continue to rotate with case, thus the problem of having avoided seal ring to lose efficacy because of excessive deformation.3, case is connected with retainer by buckle structure, and when case lid was subject to huge External Force Acting suddenly, case can separate with other parts, made fuel tank be in all the time sealing state, has guaranteed fork truck safety, normal work.
Description of drawings
Fig. 1 is exploded view of the present invention.
Fig. 2 is the constructional drawing of raising middle flask cap assemblies of the present invention.
Fig. 3 is the constructional drawing of case lid among the present invention.
Fig. 4 is that the A-A of Fig. 3 is to cutaway view.
Fig. 5 is the block diagram of case lid among the present invention.
Fig. 6 is the block diagram at another visual angle of case lid among the present invention.
The specific embodiment
As shown in Figure 1, the present embodiment comprises casing 1(steel stamping part), and be installed on respectively case lid assembly 2 and case lid 3 on this casing; Case lid assembly 2 and case lid 3 must seal reliably with casing 1 junction, and faying face all seals with the O RunddichtringO.
The A place of described casing 1 is used for install bin cap assemblies 2, and is with the O-ring seals sealing, fastening with bolt and packing ring between the two, so plane, A place must smoothly, bright and clean meet the sealing member installation requirement; The B place is oil filling port, is used for installing case lid 3, the outside thread size of this case lid and the dimension of inner screw thread no-float of oil filling port, and gas leakage is avoided in sealing; The C place is oil drain hole, is positioned at casing 1 bottom.
As shown in Figure 2, described case lid assembly 2 comprises cover plate 2-1, runs through the oil suction pipe 2-2 and the oil return pipe 2-3 that are fixed on this cover plate, and is installed on the fuel-quantity transducer 2-4 on this cover plate; Its cover plate 2-1 lower surface has O shape ring recess, realizes being tightly connected of cover plate 2-1 and casing 1 for placing O-ring seals, and cover plate 2-1 periphery has a circle mounting hole, is used for the fixing of case lid assembly 2 and casing 1; Oil suction pipe 2-2 bottom welding has carriage 2-6, and the oil pump 2-5 that is communicated with oil suction pipe 2-2 is installed on this carriage; Described fuel-quantity transducer 2-4 and oil pump 2-5 are connected to the external control unit by fuel-quantity transducer wire harness 2-7 and oil pump harness 2-8 respectively, and need between fuel-quantity transducer 2-4, sensor wire harness 2-7, oil pump harness 2-8 and the cover plate 2-1 to fix and seal with glue.
As shown in Figure 3, Figure 4, described case lid 3 comprises the hollow lid that is connected with casing 1 thread seal, the coaxial stifle 3-8 that is fixed with in this lid, this stifle below is coaxial spring 3-9, ring seal dish 3-10 and the ring-shaped rubber pad 3-11 of installing successively from top to bottom, and wherein rubber pad 3-11 lower surface contacts with the lid inner wall sealing under upper spring 3-9 effect; Described rubber pad 3-11 below is coaxial disc safety valve 3-13 and the lower spring 3-12 of being provided with successively from top to bottom, it is spacing that wherein lower spring 3-12 withstands the lower end realization of lid inwall, safety valve 3-13 lower surface is withstood in the upper end, and utilizes the elastic force of lower spring 3-12 itself to realize that safety valve 3-13 contacts with the sealing of rubber pad 3-11 lower surface.In this example, described safety valve 3-13 up and down on two end faces respectively one be shaped with guidepost 3-14 and spring fitting post 3-15, wherein guidepost 3-14 passes the centre hole formation free-running fit of seal disc 3-10 and rubber pad 3-11, and lower spring 3-12 coaxial sleeve is located at outside the spring fitting post 3-15.After case lid 3 was installed on the casing 1, safety valve 3-13 upper space was communicated with outside atmosphere, safety valve 3-13 lower space and casing 1 internal communication.
In actual the use, minimizing along with oil mass in the fuel tank, produce negative pressure in the fuel tank, when pressure during less than-0.7kPa, safety valve 3-13 overcomes the elastic force of lower spring 3-12 under the bar pressure effect, move down, so that safety valve 3-13 and rubber pad 3-11 lower surface break away from, extraneous air is by the gap between guidepost 3-14 and seal disc 3-10, the rubber pad 3-11 centre hole, and the gap between safety valve 3-13 and the rubber pad 3-11, enter into safety valve 3-13 lower space (namely entering in the fuel tank), prevent that the fuel tank suction is flat, guarantee that fuel feeding is smooth and easy; On the other hand when fork truck when jolting the road surface, produce oil gas in the fuel tank, perhaps work as fuel tank and be subject to sharp impacts, tank pressure sharply raises, when pressure during greater than+24.5kPa, rubber pad 3-11 overcomes the elastic force of upper spring 3-9 under pressure, move up, so that safety valve 3-13 and rubber pad 3-11 lower surface break away from, oil gas is by guidepost 3-14 and seal disc 3-10 in the case, gap between the rubber pad 3-11 centre hole, and discharge in the gap between safety valve 3-13 and the rubber pad 3-11, the regulating oil tank internal pressure, make the fuel tank internal pressure maintain all the time design value-0.7kPa ~+the 24.5kPa scope in, thereby guaranteed leak tightness and the accurate input pressure of fuel tank, avoid oil leakage phenomenon, guaranteed the work of the normal safety of fork truck.The response pressure of safety valve 3-13 is determined by the elastic force of upper spring 3-9 and lower spring 3-12.
Such as Fig. 5, shown in Figure 6, described lid comprises that the housing 3-7(outside face that mates with casing 1 screw thread is processed with the outside thread that mates with the oil filling port negative thread), and coaxial sleeve is located at the outer seal ring 3-6 of this housing, its middle shell 3-7 upper surface is equipped with linkage piece 3-5, rotor wheel 3-4 and case 3-1 from bottom to top successively, and connect by draw-in groove fixture block structure between linkage piece 3-5, rotor wheel 3-4 and the case 3-1, realize the function that linkage piece 3-5 and rotor wheel 3-4 can rotate with case 3-1; In addition, described housing 3-7 upper surface vertically is shaped with a circle plastic flange 3-7-1, all be processed with the inclined-plane that one day, housing 3-7 tightening direction tilted on each flange 3-7-1, be processed with the groove 3-5-1 that a circle and flange 3-7-1 are complementary on the linkage piece 3-5, described flange 3-7-1 embeds in the corresponding groove 3-5-1, at this moment, if linkage piece 3-5 rotates, then can drive housing 3-7 and also rotate, thereby case lid 3 is tightened on the oil filling port; When screwing force surpasses certain value, force flange 3-7-1 to deform and in groove 3-5-1, skid off, at this moment, only linkage piece 3-5 and rotor wheel 3-4 rotate with case 3-1, and housing 3-7 can not rotate, and loses efficacy to avoid seal ring 3-6 excessive deformation.
Described case 3-1 upward is equipped with coaxial sleeve by buckle structure and is located at the outer retainer 3-3 of housing 3-7, when case lid 3 is subject to huge External Force Acting suddenly, case 3-1 can separate with other parts, makes fuel tank be in all the time sealing state, has guaranteed fork truck safety, normal work.
It is 201220002961.2 the disclosed structure of Chinese utility model patent that described lid also can adopt the patent No., to reach same effect.
Be connected with a tethers 3-2 on the described case 3-1, the free end of this tethers is bolted on casing 1, can effectively prevent losing of case lid 3.
Claims (5)
1. fork truck fuel tank, comprise casing (1), and be seal-installed on respectively case lid assembly (2) and case lid (3) on this casing, it is characterized in that: described case lid (3) comprises the hollow lid that is connected with casing (1) thread seal, the coaxial stifle (3-8) that is fixed with in this lid, this stifle below is coaxial spring (3-9), ring seal dish (3-10) and the ring-shaped rubber pad (3-11) installed successively from top to bottom, and wherein rubber pad (3-11) lower surface contacts with the lid inner wall sealing under upper spring (3-9) acts on; Described rubber pad (3-11) below is coaxial disc safety valve (3-13) and the lower spring (3-12) of being provided with successively from top to bottom, it is spacing that wherein the realization of lid inwall is withstood in lower spring (3-12) lower end, and the upper end is withstood safety valve (3-13) lower surface and contacted to realize its sealing with rubber pad (3-11) lower surface.
2. fork truck fuel tank according to claim 1, it is characterized in that: described safety valve (3-13) up and down on two end faces respectively one be shaped with guidepost (3-14) and spring fitting post (3-15), wherein guidepost (3-14) passes the centre hole formation free-running fit of seal disc (3-10) and rubber pad (3-11), and lower spring (3-12) coaxial sleeve is located at outside the spring fitting post (3-15).
3. fork truck fuel tank according to claim 1 and 2, it is characterized in that: described lid comprises the housing (3-7) with casing (1) screw thread coupling, and coaxial sleeve is located at the outer seal ring (3-6) of this housing, its middle shell (3-7) upper surface is equipped with successively from bottom to top and can rotates together, also can drive linkage piece (3-5), rotor wheel (3-4) and the case (3-1) that housing (3-7) rotates, and by buckle structure coaxial sleeve is installed on this case and is located at the outer retainer (3-3) of housing (3-7); Described housing (3-7) upper surface vertically is shaped with a circle flange (3-7-1), all be processed with the inclined-plane that housing on one day (3-7) tightening direction tilts on each flange (3-7-1), be processed with the groove (3-5-1) that a circle and flange (3-7-1) are complementary on the linkage piece (3-5).
4. fork truck fuel tank according to claim 3 is characterized in that: be connected with a tethers (3-2) on the described case (3-1).
5. fork truck fuel tank according to claim 1 and 2, it is characterized in that: described case lid assembly (2) comprises cover plate (2-1), runs through the oil suction pipe (2-2) and the oil return pipe (2-3) that are fixed on this cover plate, and be installed on fuel-quantity transducer (2-4) on this cover plate, wherein oil suction pipe (2-2) bottom welding has carriage (2-6), and the oil pump (2-5) that is communicated with oil suction pipe (2-2) is installed on this carriage; Described fuel-quantity transducer (2-4) and oil pump (2-5) are connected to the external control unit by fuel-quantity transducer wire harness (2-7) and oil pump harness (2-8) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310227570XA CN103318015A (en) | 2013-06-08 | 2013-06-08 | Fuel tank for forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310227570XA CN103318015A (en) | 2013-06-08 | 2013-06-08 | Fuel tank for forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103318015A true CN103318015A (en) | 2013-09-25 |
Family
ID=49187180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310227570XA Pending CN103318015A (en) | 2013-06-08 | 2013-06-08 | Fuel tank for forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103318015A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106427544A (en) * | 2016-09-27 | 2017-02-22 | 宁波舜江汽车部件制造有限公司 | Automobile fuel tank filler cap assembly |
| CN115264136A (en) * | 2022-08-15 | 2022-11-01 | 东莞利富高塑料制品有限公司 | Safety valve for automobile oil tank |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4091955A (en) * | 1977-05-24 | 1978-05-30 | Stant Manufacturing Company, Inc. | Plastic filler neck cap |
| US5449086A (en) * | 1993-10-18 | 1995-09-12 | Stant Manufacturing Inc. | Delayed actuation fuel cap |
| WO1995030596A1 (en) * | 1994-05-06 | 1995-11-16 | Stant Manufacturing Inc. | Lost-motion fuel cap with cap closure indicator |
| CN1421360A (en) * | 2001-11-26 | 2003-06-04 | 丰田合成株式会社 | Filling oil device for fuel oil box |
| US20030205578A1 (en) * | 2000-09-18 | 2003-11-06 | Newport James B | Torque-limit signal system for filler neck cap |
| CN201627662U (en) * | 2010-02-01 | 2010-11-10 | 北京汽车研究总院有限公司 | Fuel oil supplying device and automobile |
| US20110240643A1 (en) * | 2010-03-04 | 2011-10-06 | Stant Usa Corp. | Cap-installation signal system for filler neck cap |
| CN202669468U (en) * | 2012-04-19 | 2013-01-16 | 斯丹德汽车***（苏州）有限公司 | Separation protection type fuel tank cap mounted on position of oil filling pipe mouth |
| CN203372057U (en) * | 2013-06-08 | 2014-01-01 | 杭叉集团股份有限公司 | Forklift fuel tank |
-
2013
- 2013-06-08 CN CN201310227570XA patent/CN103318015A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4091955A (en) * | 1977-05-24 | 1978-05-30 | Stant Manufacturing Company, Inc. | Plastic filler neck cap |
| US5449086A (en) * | 1993-10-18 | 1995-09-12 | Stant Manufacturing Inc. | Delayed actuation fuel cap |
| WO1995030596A1 (en) * | 1994-05-06 | 1995-11-16 | Stant Manufacturing Inc. | Lost-motion fuel cap with cap closure indicator |
| US20030205578A1 (en) * | 2000-09-18 | 2003-11-06 | Newport James B | Torque-limit signal system for filler neck cap |
| CN1421360A (en) * | 2001-11-26 | 2003-06-04 | 丰田合成株式会社 | Filling oil device for fuel oil box |
| CN201627662U (en) * | 2010-02-01 | 2010-11-10 | 北京汽车研究总院有限公司 | Fuel oil supplying device and automobile |
| US20110240643A1 (en) * | 2010-03-04 | 2011-10-06 | Stant Usa Corp. | Cap-installation signal system for filler neck cap |
| CN202669468U (en) * | 2012-04-19 | 2013-01-16 | 斯丹德汽车***（苏州）有限公司 | Separation protection type fuel tank cap mounted on position of oil filling pipe mouth |
| CN203372057U (en) * | 2013-06-08 | 2014-01-01 | 杭叉集团股份有限公司 | Forklift fuel tank |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106427544A (en) * | 2016-09-27 | 2017-02-22 | 宁波舜江汽车部件制造有限公司 | Automobile fuel tank filler cap assembly |
| CN115264136A (en) * | 2022-08-15 | 2022-11-01 | 东莞利富高塑料制品有限公司 | Safety valve for automobile oil tank |
| CN115264136B (en) * | 2022-08-15 | 2023-04-14 | 东莞利富高塑料制品有限公司 | Safety valve for automobile oil tank |
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Application publication date: 20130925 |
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