CN206049643U - A kind of fork truck master cylinder for improving pump body structure - Google Patents

A kind of fork truck master cylinder for improving pump body structure Download PDF

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Publication number
CN206049643U
CN206049643U CN201620938441.0U CN201620938441U CN206049643U CN 206049643 U CN206049643 U CN 206049643U CN 201620938441 U CN201620938441 U CN 201620938441U CN 206049643 U CN206049643 U CN 206049643U
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China
Prior art keywords
lug
brake fluid
master cylinder
brake
pump housing
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Active
Application number
CN201620938441.0U
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Chinese (zh)
Inventor
钱正旺
张冬林
王平
许振兴
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Anhui Heli Co Ltd
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Anhui Heli Co Ltd
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Priority to CN201620938441.0U priority Critical patent/CN206049643U/en
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Abstract

The utility model discloses a kind of fork truck master cylinder for improving pump body structure, including mounting bracket, brake pedal unit, master cylinder, the master cylinder include push rod assembly, the pump housing, piston.By the innovative design of brake pump pump body structure, the position of delivery valve is changed so that the work of delivery valve is not affected by return spring, it is ensured that the reliability of brake pump.Bleed screw is additionally arranged on the brake pump pump housing, pump body is efficiently solved and be there is the phenomenon that air cannot be discharged.

Description

A kind of fork truck master cylinder for improving pump body structure
Technical field
This utility model belongs to fork lift truck structure design field, and it is related to a kind of fork truck braking for improving pump body structure Master cylinder.
Background technology
Fork truck original brake master cylinder structure is shown in Fig. 4 and Fig. 5, and former master cylinder 4 is main by push rod assembly 31, cylinder body 32, piston 33rd, sealing ring 34, return spring 35, delivery valve 36 are constituted, and are wherein provided with oil-in 321 and oil-out on master cylinder cylinder body 32 322.Isolation inside cylinder body 32 is upper and lower two not connected cavitys by master cylinder inner seal rings 34.Work schedule moves pedal Push rod assembly 31 is driven to push down on piston 33 when assembly 2 is operated, so as to push cavity of resorption brake fluid Jing oil-outs 322 to braking Car load braking is produced in device;When car load is no longer braked, with the return upwards of brake pedal unit 2, piston 33 is because of return for push rod assembly 31 35 active force of spring return upwards, in brake, brake fluid Jing delivery valves 36 return to 32 cavity of resorption of cylinder body, and delivery valve 36 is in this off-load Vital effect is played in loop.Current this master cylinder using when the problem that exists be:Delivery valve 36 is in back The lower position of position spring 35, when return spring 35 can not return, 36 cisco unity malfunction of delivery valve in time, cause no longer to brake When brake in brake fluid cannot return in time in master cylinder, so as to cause brake premature wear;Brake fluid enters cylinder body Certain air can be brought during 32 cavity of resorption into, because master cylinder adopts this vertical mounting structure, air to float on brake fluid upper table Face cannot exclude all the time, cause piston 33 that compressed air ability urges brake liquid first is needed during pushing down on, cause work Stroke is wasted, and can cause to brake powerless or even car load brakeless.
Utility model content
Main purpose of the present utility model is for the problems referred to above, there is provided a kind of fork truck system of improvement pump body structure Dynamic master cylinder.
A kind of fork truck master cylinder for improving pump body structure, including mounting bracket 1, brake pedal unit 2, master cylinder 3, the master cylinder 3 includes push rod assembly 31, the pump housing 32, piston 33;The pump housing is the cylindric knot that near vertical is placed Component, thereon side be provided with mounting flange, centrally along the inner chamber for being axially arranged with precision machined depth blind hole shape, in its axial direction Between position be provided with brake fluid import 321, piston 33 is inserted in the depth blind hole, and the lower end of piston 33 is located at brake fluid import Above in the of 321, and sealing ring 34 is provided with, isolation inside the pump housing 32 is upper and lower two not connected cavitys by sealing ring 34;Piston Return spring 35 is provided between the bottom of 33 lower ends and the inner chamber, 33 upper end of piston connects push rod assembly 31, push rod assembly 31 Connection brake pedal unit 2;The pump housing 32 is arranged in mounting bracket 1 by mounting flange.
32 outer lower portion of the pump housing is provided with the first lug of radially evagination, and the first lug center is provided with insertion pump The brake fluid outlet 322 of intracoelomic cavity, brake fluid outlet 322 are provided with delivery valve 36;
During use, push rod assembly 31 when brake pedal unit 2 is operated, is driven to push down on piston 33, sealing ring 34 is crossed After brake fluid import 321, start to pressurize brake fluid compression, when brake fluid pressure starts pressure more than delivery valve 36, cavity of resorption Brake fluid Jing brake fluid outlet 322 produces car load braking in pushing brake to;When car load is no longer braked, push rod assembly 31 is with braking The return upwards of pedal assembly 2, because of 35 active force of return spring return upwards, in brake, brake fluid pressure is more than fuel-displaced for piston 33 Valve 36 starts pressure, and brake fluid Jing brake fluid outlet 322 returns to 32 cavity of resorption of cylinder body.
The technical scheme for further limiting is as follows:
First lug is cylindric lug.
The delivery valve 36 is fixed by the flowline connection to subsea 37 being installed in the first lug, makes delivery valve 36 avoid pump The interference of return spring 35 in vivo.
The outer lower portion of the pump housing 32, sets on the cross section at the first lug center that 322 positions are exported positioned at brake fluid There is the second lug, perpendicular to the first lug, the center of the second lug is provided with the gas outlet of insertion pump housing inner chamber to second lug 323, gas outlet 323 is provided with bleed screw 38.
Second lug is cylindric lug.
Effective technology effect of the present utility model is:
(1)The innovative design of brake pump pump body structure, changes the position of delivery valve so that the work of delivery valve is not received The impact of return spring, it is ensured that the reliability of brake pump;
(2)Bleed screw is additionally arranged on the brake pump pump housing, efficiently solve that pump body has that air cannot discharge shows As.
Description of the drawings
Accompanying drawing 1 is this utility model schematic view of the mounting position.
Accompanying drawing 2 is this utility model structural representation.
Accompanying drawing 3 is this utility model bleed screw position view.
Accompanying drawing 4 is former master cylinder schematic view of the mounting position.
Accompanying drawing 5 is former brake master cylinder structure schematic diagram.
Sequence number in upper figure:Mounting bracket 1, brake pedal unit 2, master cylinder 3, former master cylinder 4, push rod assembly 31, The pump housing 32, piston 33, sealing ring 34, return spring 35, delivery valve 36, flowline connection to subsea 37, bleed screw 38, brake fluid import 321st, brake fluid outlet 322, gas outlet 323.
Specific embodiment
Below in conjunction with the accompanying drawings, by embodiment, the utility model is further described.
Embodiment
Referring to Fig. 1, Fig. 2, a kind of fork truck master cylinder of improvement pump body structure, including mounting bracket 1, brake pedal are total Into 2, master cylinder 3.The master cylinder 3 includes push rod assembly 31, the pump housing 32, piston 33, and push rod assembly 31 is vertically inserted in pump In the inner chamber of body 32, its upper end connects brake pedal unit 2, and its lower end is sequentially provided with sealing ring 34, return spring 35, return bullet The not pressurized free state position of spring 35, is provided with brake fluid import on the internal chamber wall of the pump housing 32 closed on below sealing ring 34 321;Limit state position under return spring 35 is compressed, is provided with the internal chamber wall of the pump housing 32 closed on below sealing ring 34 Brake fluid outlet 322, brake fluid outlet 322 is manhole, and it is penetrated on the outside of the pump housing perpendicular to internal chamber wall, outside the pump housing 32 The brake fluid of side exports 322 positions and is provided with the first lug, and the first lug is cylindric lug.Set in brake fluid outlet 322 There is delivery valve 36, which is fixed by the flowline connection to subsea 37 being installed on the first lug, delivery valve 36 avoids returning in the pump housing The interference of position spring 35.The pump housing 32 is arranged in mounting bracket 1 by mounting flange.
Referring to Fig. 3, the outer lower portion of the pump housing 32, the horizontal stroke at the first lug center of 322 positions is exported positioned at brake fluid On tangent plane, the second lug is provided with the radial direction upright position of the first lug, the second lug is cylindric lug, and its center is provided with to be passed through The gas outlet 323 of logical pump housing inner chamber, gas outlet 323 are provided with bleed screw 38, efficiently solve pump body exist air without The phenomenon that method is discharged.
During use, the mounting bracket 1 equipped with brake pedal unit 2, master cylinder 3 is arranged on the setting position of fork truck, Push rod assembly 31 is driven to push down on piston 33 when brake pedal unit 2 is operated, sealing ring 34 crosses brake fluid import 321 Afterwards, start to pressurize brake fluid compression, when brake fluid pressure starts pressure more than delivery valve 36, cavity of resorption brake fluid Jing brake fluid Outlet 322 produces car load braking in pushing brake to;When car load is no longer braked push rod assembly 31 with brake pedal unit 2 back up Position, because of 35 active force of return spring return upwards, in brake, brake fluid pressure starts pressure, system more than delivery valve 36 to piston 33 Hydrodynamic Jing brake fluid outlet 322 returns to 32 cavity of resorption of cylinder body, completes the car load braking of a fork truck.
This utility model does not change the mounting flange size of former master cylinder 4, convenient to replace former master cylinder 4.
Above content not makees any pro forma restriction to structure of the present utility model, shape.It is every according to this practicality Any simple modification, equivalent variations and modification that new technical spirit is made to above example, still fall within this practicality new In the range of type technical scheme.

Claims (5)

1. a kind of fork truck master cylinder for improving pump body structure, including mounting bracket(1), brake pedal unit(2), braking it is total Pump(3), the master cylinder(3)Including push rod assembly(31), the pump housing(32), piston(33);The pump housing is put near vertical The cylindrical-shaped structure part put, thereon side be provided with mounting flange, centrally along being axially arranged with precision machined depth blind hole shape Inner chamber, its axial middle part are provided with brake fluid import(321), piston(33)It is inserted in the depth blind hole, piston(33)'s Lower end is located at brake fluid import(321)Top, and it is provided with sealing ring(34), sealing ring(34)By the pump housing(32)Internal isolation is upper Lower two not connected cavitys;Piston(33)Return spring is provided between the bottom of lower end and the inner chamber(35), piston (33)Upper end connects push rod assembly(31), push rod assembly(31)Connection brake pedal unit(2);The pump housing(32)By mounting flange Installed in mounting bracket(1)On, it is characterised in that:
The pump housing (32) outer lower portion is provided with the first lug of radially evagination, and the first lug center is provided with the insertion pump housing The brake fluid outlet of inner chamber(322), brake fluid outlet(322)It is provided with delivery valve(36);
During use, brake pedal unit(2)Push rod assembly is driven when being operated(31)Push down on piston(33), sealing ring(34) Cross brake fluid import(321)Afterwards, start to pressurize brake fluid compression, when brake fluid pressure is more than delivery valve(36)Start pressure When, the outlet of cavity of resorption brake fluid Jing brake fluid(322)Car load braking is produced in pushing brake to;Push rod assembly when car load is no longer braked (31)With brake pedal unit(2)Return upwards, piston(33)Because of return spring(35)Active force return upwards, makes in brake Hydrodynamic forces are more than delivery valve(36)Start pressure, the outlet of brake fluid Jing brake fluid(322)Return to cylinder body(32)Cavity of resorption.
2. it is according to claim 1 it is a kind of improve pump body structure fork truck master cylinder, it is characterised in that:Described first Lug is cylindric lug.
3. it is according to claim 1 it is a kind of improve pump body structure fork truck master cylinder, it is characterised in that:It is described fuel-displaced Valve(36)It is fixed by the flowline connection to subsea (37) being installed in the first lug, make delivery valve(36)Avoid return bullet in the pump housing Spring(35)Interference.
4. it is according to claim 1 it is a kind of improve pump body structure fork truck master cylinder, it is characterised in that:The pump Body(32)Outer lower portion, positioned at brake fluid export(322)The cross section at the first lug center of position is provided with the second lug, Perpendicular to the first lug, the center of the second lug is provided with the gas outlet of insertion pump housing inner chamber to second lug(323), gas outlet (323)It is provided with bleed screw(38).
5. it is according to claim 4 it is a kind of improve pump body structure fork truck master cylinder, it is characterised in that:Described second Lug is cylindric lug.
CN201620938441.0U 2016-08-25 2016-08-25 A kind of fork truck master cylinder for improving pump body structure Active CN206049643U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620938441.0U CN206049643U (en) 2016-08-25 2016-08-25 A kind of fork truck master cylinder for improving pump body structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620938441.0U CN206049643U (en) 2016-08-25 2016-08-25 A kind of fork truck master cylinder for improving pump body structure

Publications (1)

Publication Number Publication Date
CN206049643U true CN206049643U (en) 2017-03-29

Family

ID=58384543

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620938441.0U Active CN206049643U (en) 2016-08-25 2016-08-25 A kind of fork truck master cylinder for improving pump body structure

Country Status (1)

Country Link
CN (1) CN206049643U (en)

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