CN207984839U - A kind of truck hydraulic braking system with bladder type hydropneumatic accumulator - Google Patents
A kind of truck hydraulic braking system with bladder type hydropneumatic accumulator Download PDFInfo
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- CN207984839U CN207984839U CN201820172366.0U CN201820172366U CN207984839U CN 207984839 U CN207984839 U CN 207984839U CN 201820172366 U CN201820172366 U CN 201820172366U CN 207984839 U CN207984839 U CN 207984839U
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Abstract
The utility model discloses a kind of truck hydraulic braking systems with bladder type hydropneumatic accumulator, including left brake cylinder, right brake cylinder, brake valve, bladder type hydropneumatic accumulator and the brake pump being connect with fuel tank, the brake pump is connect with first throttle valve and brake valve respectively, the first throttle valve is connect with accumulator valve block, the accumulator valve block respectively with bladder type hydropneumatic accumulator, alarm switch is connected with second throttle, the second throttle is connect with brake valve, the brake valve is connect with residual valve and fuel tank respectively, the residual valve and a left side, right brake cylinder connection.The utility model is realized by brake pump, first throttle valve, accumulator valve block, bladder type hydropneumatic accumulator, second throttle, brake valve and left and right brake cylinder and is controlled braking system, pass through the use of bladder type hydropneumatic accumulator, increase accumulator dischargeable capacity, can solve the problems, such as that alarm switch is often alarmed.And when oil pump is stopped or damages, emergency braking can be realized.
Description
Technical field
The utility model belongs to fork truck design field, specifically, it is related to a kind of fork with bladder type hydropneumatic accumulator
Vehicle brake fluid system.
Background technology
Brake system of forklift is important one of the system of fork truck, and safety issue when concerning actual job is therefore, complete
Kind braking system is vital.
Referring to Fig. 5, truck hydraulic non-muscular energy braking system includes fuel tank 1, return filter 2, oil absorption filter 3, system at present
Dynamic oil pump 4, alarm switch 7, brake valve 9, left brake cylinder 12, right brake cylinder 13, spring accumul ator 14 and threeway 15.By
It is shunt circuit in spring accumul ator 14 and brake valve 9, during fork truck frequently puts brake, 14 pressure of spring accumul ator is very
It releases soon, the often alarm of alarm switch 7 and braking abnormal sound often occurs, carry out security risk to fork truck brake band.
Utility model content
The utility model provides to solve the problems, such as that abnormal sound is alarmed and braked to the length that original spring accumul ator is brought
A kind of truck hydraulic braking system with bladder type hydropneumatic accumulator.
The technical solution of the utility model is：A kind of truck hydraulic braking system with bladder type hydropneumatic accumulator, including fuel tank
1, return filter 2, oil absorption filter 3, brake pump 4, first throttle valve 5, alarm switch 7, brake valve 9, second throttle
10, left brake cylinder 12 and right brake cylinder 13,4 inlet port of the brake pump connect oil absorption filter 3, the oil suction filtering
Device 3 is immersed in fuel tank 1, and the brake pump 4 is set there are two oil outlet, and described two oil outlets are separately connected first throttle valve
5 and brake valve 9 oil inlet.The oil inlet of the oil return opening connection return filter 2 of brake valve 9, the oil outlet of return filter 2
It is connected to fuel tank 1.
The oil outlet of the first throttle valve 5 is connect with 6 oil inlet of accumulator valve block, accumulator valve block 6 and bellows accumulation of energy
Device 8 connects, and the accumulator valve block 6 is connect with second throttle 10, and second throttle 10 connects with 9 emergency braking mouth of brake valve
Connect, the brake valve 9 brake hydraulic fluid port connect with residual valve 11,11 oil outlet of the residual valve by three-way connection respectively with left system
Dynamic oil cylinder 12 is connected with 13 oil inlet of right brake cylinder.Alarm switch 7 is connected in accumulator valve block 6.When fork truck is being run over
Brake pushrod is stepped in journey, brake valve 9 is in retarder location, and brake pump 4 gives 13 fuel feeding of left brake cylinder 12 and right brake cylinder,
8 filling liquid of bladder type hydropneumatic accumulator is given simultaneously.When fork truck in the process of moving, the power source of brake pump 4 cannot provide power because unexpected,
Brake pushrod is firmly stepped at this time, and brake valve 9 is in emergency position, and bladder type hydropneumatic accumulator 8 gives left brake cylinder 12 and right braking
13 fuel feeding of oil cylinder completes emergency braking.
The technical solution further limited is as follows：
The accumulator valve block 6 is cuboid, including valve block oil inlet 61, one-way pressure maintaining valve 62, valve block oil outlet 63, valve
Block auxiliary braking mouth 64, valve block oil return opening 65 and system overflow valve 66.The left side of accumulator valve block 6 is equipped with valve block oil inlet
61, right side connects alarm switch 7, and upper side connects one-way pressure maintaining valve 62, and downside connects system overflow valve 66.Accumulator valve
The leading flank first half of block 6 is equipped with valve block auxiliary braking mouth 64, and the leading flank lower half of accumulator valve block 6 is equipped with valve block oil return opening
65。
The specification of the bladder type hydropneumatic accumulator 8 is NXQA-1/31.5-L.
The advantageous effects of the utility model are：
(1) by the use of bladder type hydropneumatic accumulator, increase accumulator dischargeable capacity, and when oil pump is stopped or damages,
Bladder type hydropneumatic accumulator completes emergency braking to left brake cylinder and right brake cylinder fuel feeding.
(2) bladder type hydropneumatic accumulator is used on the fork truck of ten tons or less specifications, replaces original spring type mechanical accumulator, increases accumulator
The pressure oil overwhelming majority that oil pump exports is input to brake valve by actually active volume, first throttle valve, and second throttle slows down
Energy storage pressure oil rate of release thoroughly solves occur alarm switch often alarm and braking in braking process by Optimal improvements
Abnormal sound problem, improves braking system stability, and fork truck security performance is improved.
Description of the drawings
Fig. 1 is the utility model pipeline scheme of installation.
Fig. 2 is the utility model bladder type hydropneumatic accumulator scheme of installation.
Fig. 3 is the utility model accumulator valve block structure schematic diagram.
Fig. 4 is Tthe utility model system principle schematic.
Fig. 5 is spring accumul ator brake fluid system schematic diagram.
Serial number in figure：Fuel tank 1, return filter 2, oil absorption filter 3, brake pump 4, first throttle valve 5, accumulator valve
Block 6, valve block oil inlet 61, one-way pressure maintaining valve 62, valve block oil outlet 63, valve block auxiliary braking mouth 64, valve block oil return opening 65, system
Overflow valve 66, alarm switch 7, bladder type hydropneumatic accumulator 8, brake valve 9, second throttle 10, residual valve 11, left brake cylinder 12, the right side
Brake cylinder 13, spring accumul ator 14, threeway 15.
Specific implementation method
Below in conjunction with the accompanying drawings, by embodiment, the utility model is described in further detail.
Embodiment one
Referring to Fig. 1 and Fig. 2, a kind of truck hydraulic braking system with bladder type hydropneumatic accumulator, including fuel tank 1, oil return filter
Device 2, oil absorption filter 3, brake pump 4, first throttle valve 5, alarm switch 7, brake valve 9, second throttle 10, left brake oil
Cylinder 12 and right brake cylinder 13,4 inlet port of the brake pump connect oil absorption filter 3, and the oil absorption filter 3 is immersed in fuel tank
In 1, the brake pump 4 is set there are two oil outlet, and described two oil outlets are separately connected first throttle valve 5 and brake valve 9
Oil inlet.The oil inlet of the oil return opening connection return filter 2 of brake valve 9, oil outlet and the fuel tank 1 of return filter 2 connect
It is logical.
The oil outlet of the first throttle valve 5 is connect with 6 oil inlet of accumulator valve block, accumulator valve block 6 and bellows accumulation of energy
Device 8 connects, and the accumulator valve block 6 is connect with second throttle 10, and second throttle 10 connects with 9 emergency braking mouth of brake valve
Connect, the brake valve 9 brake hydraulic fluid port connect with residual valve 11,11 oil outlet of the residual valve by three-way connection respectively with left system
Dynamic oil cylinder 12 is connected with 13 oil inlet of right brake cylinder.Alarm switch 7 is connected in accumulator valve block 6.The bladder type hydropneumatic accumulator 8
Specification be NXQA-1/31.5-L, wherein 1 indicate accumulator volume be 1L, 31.5 expression accumulator maximum pressures be
31.5MPa。
Referring to Fig. 3, the accumulator valve block 6 is cuboid, including valve block oil inlet 61, one-way pressure maintaining valve 62, valve block go out
Hydraulic fluid port 63, valve block auxiliary braking mouth 64, valve block oil return opening 65 and system overflow valve 66.The left side of accumulator valve block 6 is equipped with valve
Block oil inlet 61, right side connect alarm switch 7, and upper side connects one-way pressure maintaining valve 62, and downside connects system overflow valve 66.
The leading flank first half of accumulator valve block 6 is equipped with valve block auxiliary braking mouth 64, and the leading flank lower half of accumulator valve block 6 is equipped with valve
Block oil return opening 65.Valve block oil inlet 61 is connect with brake pump 4, and valve block oil outlet 63 is connect with bladder type hydropneumatic accumulator 8, and valve block is auxiliary
Brake port 64 is helped to be connect with brake valve 9, valve block oil return opening 65 is connect with fuel tank, and one-way pressure maintaining valve 62 is for keeping inside accumulator
Pressure, system overflow valve 66 are protected for system overload.
Referring to Fig. 4, the utility model braking system course of work is as follows：
(1) brake pump unloading condition：
When fork truck in the process of moving when, brake valve 9 is in middle position, and left brake cylinder 12, right brake cylinder 13 are in
The fluid of non-brake state, the P1 mouthfuls of outputs of 4 oil outlet of brake pump flows directly into the P mouths of brake valve 9, then the N by brake valve 9
Mouthful, return to fuel tank 1 through return filter 2.
(2) on-position service brake and filling liquid state：
When fork truck steps on brake pushrod in the process of moving, brake valve 9 is in retarder location, P1 mouthfuls of 4 oil outlet of brake pump
The fluid of output divides two-way, connects the P mouths of brake valve 9 all the way, then by the Br mouths of brake valve 9, the P8 mouths through residual valve 11, point
Brake cylinder is not entered from left brake cylinder 12, the P10 of right brake cylinder 13 and P9 mouthfuls, brake cylinder pushes brake real at this time
Existing fork truck braking.Another way passes through the P3 mouths connection accumulation of energy of first throttle valve 5 by the P2 mouths of connection first throttle valve 5 simultaneously
The P4 mouths of device valve block 6 give 8 filling liquid of bladder type hydropneumatic accumulator.When system pressure reaches setting pressure, the high pressure oil warp of brake pump 4
It crosses first throttle valve 5 and returns to fuel tank 1 from P5 hydraulic fluid port off-loads into accumulator valve block 6.(referring to Fig. 3, the accumulator valve block 6
P4 mouthfuls are exactly valve block oil outlet 63, the accumulator valve block 6 from P5 hydraulic fluid ports be exactly valve block oil return opening 65)
(3) brake cylinder oil return：
When take-off the brake push rod, the fluid in left brake cylinder 12, right brake cylinder 13 is under the action of the spring from P10
With P9 mouthfuls, by residual valve 11, enter back into brake valve 9 finally from T mouthfuls to fuel tank 1, brake release, the setting of residual valve 11 at this time one
A back pressure allows in left brake cylinder 12, right brake cylinder 13 and there is pressure oil always, has both been avoided that brake piping is mixed into air,
Also it can guarantee that braking response is rapid next time.
(4) emergency braking：
When fork truck in the process of moving, the power source of brake pump 4 cannot provide power because unexpected, just must promptly make
It is dynamic, brake pushrod firmly is stepped at this time, brake valve 9 is in emergency position, and the pressure oil in bladder type hydropneumatic accumulator 8 enters from P7 mouthfuls
Second throttle 10 enters brake valve 9 through Pa mouthfuls, then by the Br mouths of brake valve 9, the P8 mouths through residual valve 11, from left braking
Oil cylinder 12, the P10 of right brake cylinder 13 and P9 mouthfuls enter brake cylinder, and brake cylinder pushes brake to realize that fork truck is urgent at this time
Braking.
The above content not makes any form of restriction the structure, shape of the utility model.It is every according to this practicality
It is new to still fall within this practicality to any simple modification, equivalent change and modification made by above example for novel technical spirit
In the range of type technical solution.
Claims (3)
1. a kind of truck hydraulic braking system with bladder type hydropneumatic accumulator, including fuel tank (1), return filter (2), oil suction filtering
Device (3), brake pump (4), first throttle valve (5), alarm switch (7), brake valve (9), second throttle (10), left brake oil
Cylinder (12) and right brake cylinder (13), brake pump (4) the inlet port connection oil absorption filter (3), the oil absorption filter
(3) it is inner to be immersed in fuel tank (1), the brake pump (4) sets there are two oil outlet, and described two oil outlets are separately connected first segment
Flow the oil inlet of valve (5) and brake valve (9)；The oil inlet of the oil return opening connection return filter (2) of brake valve (9), oil return
The oil outlet of filter (2) is connected to fuel tank (1)；
It is characterized in that：The oil outlet of the first throttle valve (5) is connect with accumulator valve block (6) oil inlet, accumulator valve block
(6) connect with bladder type hydropneumatic accumulator (8), the accumulator valve block (6) connect with second throttle (10), second throttle (10) with
Brake valve (9) emergency braking mouth connects, and brake valve (9) the braking hydraulic fluid port is connect with residual valve (11), the residual valve (11)
Oil outlet is connected with left brake cylinder (12) with right brake cylinder (13) oil inlet respectively by three-way connection；Alarm switch (7)
It is connected in accumulator valve block (6)；
When fork truck steps on brake pushrod in the process of moving, brake valve (9) is in retarder location, and brake pump (4) gives left brake oil
Cylinder (12) and right brake cylinder (13) fuel feeding, while giving bladder type hydropneumatic accumulator (8) filling liquid；When fork truck in the process of moving, brake oil
Power cannot be provided because unexpected by pumping the power source of (4), firmly step on brake pushrod at this time, and brake valve (9) is in emergency position,
Bladder type hydropneumatic accumulator (8) completes emergency braking to left brake cylinder (12) and right brake cylinder (13) fuel feeding.
2. a kind of truck hydraulic braking system with bladder type hydropneumatic accumulator according to claim 1, it is characterised in that：It is described
Accumulator valve block (6) is cuboid, including valve block oil inlet (61), one-way pressure maintaining valve (62), valve block oil outlet (63), valve block be auxiliary
Help brake port (64), valve block oil return opening (65) and system overflow valve (66)；The left side of accumulator valve block (6) is equipped with valve block oil inlet
Mouth (61), right side connect alarm switch (7), and upper side connects one-way pressure maintaining valve (62), and downside connects system overflow valve
(66)；The leading flank first half of accumulator valve block (6) is equipped with valve block auxiliary braking mouth (64), the leading flank of accumulator valve block (6)
Lower half is equipped with valve block oil return opening (65).
3. a kind of truck hydraulic braking system with bladder type hydropneumatic accumulator according to claim 1, it is characterised in that：It is described
The specification of bladder type hydropneumatic accumulator (8) is NXQA-1/31.5-L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820172366.0U CN207984839U (en) | 2018-02-01 | 2018-02-01 | A kind of truck hydraulic braking system with bladder type hydropneumatic accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820172366.0U CN207984839U (en) | 2018-02-01 | 2018-02-01 | A kind of truck hydraulic braking system with bladder type hydropneumatic accumulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207984839U true CN207984839U (en) | 2018-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820172366.0U Active CN207984839U (en) | 2018-02-01 | 2018-02-01 | A kind of truck hydraulic braking system with bladder type hydropneumatic accumulator |
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| CN (1) | CN207984839U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566521A (en) * | 2019-08-23 | 2019-12-13 | 安徽合力股份有限公司 | automatic explosion-proof fork truck hydraulic system of control |
| CN111439707A (en) * | 2020-04-16 | 2020-07-24 | 安徽合力股份有限公司 | Forklift lifting hydraulic oil way with regenerated descending potential energy |
-
2018
- 2018-02-01 CN CN201820172366.0U patent/CN207984839U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566521A (en) * | 2019-08-23 | 2019-12-13 | 安徽合力股份有限公司 | automatic explosion-proof fork truck hydraulic system of control |
| CN110566521B (en) * | 2019-08-23 | 2024-05-10 | 安徽合力股份有限公司 | Automatic explosion-proof fork truck hydraulic system of control |
| CN111439707A (en) * | 2020-04-16 | 2020-07-24 | 安徽合力股份有限公司 | Forklift lifting hydraulic oil way with regenerated descending potential energy |
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