CN203580932U - Charging brake valve set of wheel type hydraulic shovel - Google Patents
Charging brake valve set of wheel type hydraulic shovel Download PDFInfo
- Publication number
- CN203580932U CN203580932U CN201320610360.4U CN201320610360U CN203580932U CN 203580932 U CN203580932 U CN 203580932U CN 201320610360 U CN201320610360 U CN 201320610360U CN 203580932 U CN203580932 U CN 203580932U
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- China
- Prior art keywords
- valve
- oil
- oil inlet
- check valve
- filter
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- Expired - Lifetime
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- Braking Systems And Boosters (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses a charging brake valve set of a wheel type hydraulic shovel, belonging to the technical field of a fluid pressure actuating mechanism. Based on the primary structure, a filter (19), a reducing valve (2), a two-position three-way electromagnetic valve (16) and an overflow valve (14) are further arranged. On the basis of the braking function of a brake, the functions of filtering, parking braking and providing the oil of a pilot control system are integrated, so that the valve set is compact in structure, high in reliability and convenient to maintain; an inner oil line is arranged according to the realization of functions and a logical relationship, so that the problems of oil line interference and dysfunction can not be generated; and meanwhile, a filter is arranged behind an oil inlet, so as to prevent potential safety hazards due to the failure of a braking system caused by impurities in the oil from entering into the valve set to clamp valve cores, and improve the reliability of the charging brake valve set; and on the above basis, a normally closed type switch is connected with the oil inlet of an energy accumulator, so that the braking reliability of an integral device can be improved.
Description
Technical field
The utility model relates to a kind of wheeled hydraulic excavator topping up brake activation valve group, belongs to fluid pressure actuator technical field.
Background technology
Wheeled hydraulic excavator topping up brake activation valve generally only comprises check valve, energy storage, pressure shut-off valve and braking foot valve, and parking braking function needs extra valve piece and oil circuit to realize, the fluid of pilot control system also needs an independent gear type pump to supply with, this form not only design cost is higher, and the comparatively dispersion of whole system layout, to maintenance, make troubles.Brake system is had relatively high expectations to the cleanliness level of fluid, without the fluid filtering, easily causes spool clamping stagnation, brings potential safety hazard to normal drag, has reduced the reliability of system.
Summary of the invention
The deficiency existing for above-mentioned prior art, the utility model provides a kind of wheeled hydraulic excavator topping up brake activation valve group, filter, parking brake function, parking braking function and pilot control system fuel feeding are integrated, reduce the design cost of joint, pipeline and pump, and compact conformation, when improving reliability, be convenient to safeguard.
To achieve these goals, the technical solution adopted in the utility model is: a kind of wheeled hydraulic excavator topping up brake activation valve group, comprises sequence valve, 2/2-way change-over valve, four check valves, energy storage and interlock foot valves.
On the basis of said structure, also comprise filter, reducing valve, two-bit triplet electromagnetic valve and by pass valve.Wherein, the oil inlet of topping up brake activation valve group is connected with the oil inlet of filter, the oil outlet of filter and reducing valve, check valve
be connected check valve with the oil inlet of sequence valve
oil outlet and check valve
and check valve
oil inlet connect, check valve
and check valve
oil outlet respectively with energy storage
, energy storage
with and two oil inlets of interlock foot valve is connected, two oil outlets of the foot valve that links are connected with the second brake circuit oil inlet with the first brake circuit oil inlet respectively; The oil outlet of sequence valve is connected with pilot control oil circuit oil inlet with the oil inlet of by pass valve, and the drain tap of sequence valve is connected with the oil inlet of 2/2-way change-over valve; The oil outlet of reducing valve is connected with the oil inlet of two-bit triplet electromagnetic valve, and the oil outlet of two-bit triplet electromagnetic valve is connected with the oil inlet of braking during standstill oil circuit, the drain tap of two-bit triplet electromagnetic valve and check valve
oil inlet connect; Drain tap, the oil outlet of 2/2-way change-over valve, the oil outlet of by pass valve and the check valve of interlock foot valve
oil outlet be all connected with tank drainback mouth.
Preferably, the utility model also comprises signalling generator, and signalling generator is in parallel with filter.
Preferably, the utility model also comprises normally closed pressure switch, and normally closed pressure switch is connected with the oil inlet of energy storage.
Preferably, the utility model also comprises pressure switch open in usual, and pressure switch open in usual (11) arranges two, in parallel with the first brake circuit oil inlet and the second brake circuit oil inlet respectively.
Compared with prior art, the utility model integrated filtration on drag function basis, stop and stay moving and the function of pilot control system fluid is provided, compact conformation, reliability is high, maintain easily, internal oil passages designs according to practical function and logical relation, there will not be the problem of oil circuit interference and dysfunction; Further, after oil inlet, increased filter, preventing in fluid that impurity enters into blocks each spool in valve group and causes brake system failure to bring potential safety hazard, the signalling generator in parallel with filter detects the pressure signal of filter both sides, once plugged filter, the difference of pressure of both sides is greater than the setting pressure of signalling generator, and signalling generator just can send electric signal gives the alarm annunciator, remind chaufeur to clean or renew cartridge more, improved the reliability of topping up brake activation valve group; On the basis of the above, normally closed pressure switch is connected with the oil inlet of energy storage, and when the supercharging pressure of energy storage can not meet brake request, normally closed pressure switch contact disconnects, and now, digging machine can not be walked; Pressure switch open in usual is in parallel with the first brake circuit oil inlet and the second brake circuit oil inlet, and when drag, pressure switch contact open in usual is closed, and stoplight stop lamp lights warning front vehicle, thereby improves the braking reliability of single unit system.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present utility model.
In figure: 1, normally closed pressure switch, 2, reducing valve, 3, sequence valve, 4, check valve
, 5, energy storage
, 6, check valve
, 7, check valve
, 8, energy storage
9, interlock foot valve, 10, the first brake circuit oil inlet, 11, pressure switch open in usual, the 12, second brake circuit oil inlet, 13,2/2-way change-over valve, 14, by pass valve, 15, pilot control system oil inlet, 16, two-bit triplet electromagnetic valve, 17, braking during standstill oil circuit oil inlet, 18, check valve
, 19, filter, 20, tank drainback mouth, 21, valve group oil inlet, 22, signalling generator.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of wheeled hydraulic excavator topping up brake activation valve group, comprises sequence valve 3,2/2-way change-over valve 13, check valve
4, check valve
6, check valve
7, check valve
18, energy storage
5, energy storage
8 and interlock foot valve 9, on the basis of said structure, also increased filter 19, reducing valve (2), two-bit triplet electromagnetic valve 16 and by pass valve 14; Total oil inlet 21 of topping up brake activation valve group is connected with the oil inlet of filter 19, the oil outlet of filter 19 and reducing valve 2, check valve
4 are connected with the oil inlet of sequence valve 3, check valve
4 oil outlet and check valve
6 and check valve
7 oil inlet connects, check valve
6 and check valve
7 oil outlet respectively with energy storage
5 and energy storage
8 and two oil inlets of interlock foot valve 9 connect, two oil outlets of interlock foot valve 9 are connected with the second brake circuit oil inlet 12 with the first brake circuit oil inlet 10 respectively; The oil outlet of sequence valve 3 is connected with pilot control oil circuit oil inlet 15 with the oil inlet of by pass valve 14, and the drain tap of sequence valve 3 is connected with the oil inlet of 2/2-way change-over valve 13; The oil outlet of reducing valve 2 is connected with the oil inlet of two-bit triplet electromagnetic valve 16, and the oil outlet of two-bit triplet electromagnetic valve 16 is connected with the oil inlet 17 of braking during standstill oil circuit, the drain tap of two-bit triplet electromagnetic valve 16 and check valve
18 oil inlet connects; The interlock drain tap of foot valve 9 is, oil outlet and the check valve of the oil outlet of 2/2-way change-over valve 13, by pass valve 14
18 oil outlet is all connected with tank drainback mouth 20.
From the fluid of topping up brake activation valve group oil inlet 21, through filter 19, pass through check valve
4, check valve
6 and check valve
7 enter into energy storage
5 and energy storage
8 carry out topping up, work as energy storage
5 and energy storage
8 inlet pressure reaches after the supercharging pressure of brake system setting, check valve
the fluid of 4 oil outlets can act on guide's end of 2/2-way change-over valve 13, make 13 commutations of 2/2-way change-over valve, be operated in right position, the fluid of sequence valve 3 drain taps is got back to tank drainback mouth 20 by the right position of 2/2-way change-over valve 13, now sequence valve 3 spools move down, oil inlet is communicated with oil outlet, and the fluid of process filter 19 enters into pilot control oil circuit oil inlet 15 by sequence valve 3, and 14 pairs of pilot control systems of by pass valve play the effect of restriction top pressure simultaneously.When drag, chaufeur pin is stepped on interlock foot valve 9 and is made its commutation, energy storage
5 and energy storage
fluid in 8 enters into the first brake circuit oil inlet 10 by interlock foot valve 9 and 12 pairs of vehicle bridge of the second brake circuit oil inlet are braked.Work as energy storage
5 and energy storage
when the pressure drop in 8 arrives a certain setting value, the spring of 2/2-way change-over valve 13 left ends is pushed into the work of left position, and the drain tap of sequence valve 3 and tank drainback mouth 20 disconnect, and on the spool of sequence valve 3, move, oil inlet and oil outlet disconnect, and the fluid of process filter 19 passes through check valve
4, check valve
6 and check valve
7 enter into energy storage
5 and energy storage
8 carry out topping up again, move in circles.With respect to prior art, after topping up brake activation valve group oil inlet 21, increased filter 19 newly, prevent from fluid that impurity enters in valve group, to block each spool and cause brake system failure to bring potential safety hazard.Sequence valve 3 and by pass valve 14 after filter 19, have been increased newly, at energy storage
5 and energy storage
in the situation that 8 fluid are full of, through the fluid of filter 19, can supply with pilot control system, 14 pairs of pilot control systems of by pass valve play the effect of restriction top pressure simultaneously.Reducing valve 2 and two-bit triplet electromagnetic valve 16 after filter 19, have been increased newly, fluid by filter 19 is connected pressure decreased after the pressure of moving system to stopping through reducing valve 2 with the oil inlet of two-bit triplet electromagnetic valve 16, chaufeur is controlled the oil circuit break-make of two-bit triplet electromagnetic valve 16 by pressing rocker switch in operator's compartment, realizing stops stays moving function, two-bit triplet electromagnetic valve 16 drain taps and check valve
18 oil inlet connects, check valve
18 oil outlet is connected with tank drainback mouth 20, prevents that the fluid of oil sump tank from flowing into the oil inlet 17 of braking during standstill oil circuit by the drain tap of two-bit triplet electromagnetic valve 16, stays moving function cause interference to stopping.
As preferably, on filter 19, be parallel with signalling generator 22, the pressure difference signal at signalling generator 22 acquisition filter device 19 two ends, once gather pressure difference signal, be greater than signalling generator 22 setting pressures, in proof filter 19, held certain impurity, now signalling generator 22 just can send electric signal annunciator is given the alarm, and long-range prompting chaufeur cleans and changes the filter core of filter 19, has improved the reliability of topping up brake activation valve group.
As preferably, normally closed pressure switch 1 is connected with the oil inlet of energy storage 5, and when the supercharging pressure of energy storage 5 can not meet brake request, normally closed pressure switch contact disconnects, and now, wheel excavator can not be walked, and improve the safety of drag.
As preferably, also increased pressure switch 11 open in usual, pressure switch 11 open in usual arranges two, in parallel with the first brake circuit oil inlet 10 and the second brake circuit oil inlet 12, when drag, pressure switch contact open in usual is closed, and stoplight stop lamp lights, and plays the effect of warning rear driving vehicle.
In sum, the utility model guarantees that whole topping up brake activation valve group has reduced the quantity of joint, pipeline and pump, and compact conformation, when having reduced design cost, has improved the reliability of integral stop.
Claims (4)
1. a wheeled hydraulic excavator topping up brake activation valve group, comprises sequence valve (3), 2/2-way change-over valve (13), check valve
(4), check valve
(6), check valve
(7), check valve
(18), energy storage
(5), energy storage
(8) and interlock foot valve (9), it is characterized in that, also comprise filter (19), reducing valve (2), two-bit triplet electromagnetic valve (16) and by pass valve (14); Total oil inlet (21) of topping up brake activation valve group is connected with the oil inlet of filter (19), the oil outlet of filter (19) and reducing valve (2), check valve
(4) be connected check valve with the oil inlet of sequence valve (3)
(4) oil outlet and check valve
and check valve (6)
(7) oil inlet connects, check valve
and check valve (6)
(7) oil outlet respectively with energy storage
and energy storage (5)
(8) and two oil inlets of interlock foot valve (9) connect, two oil outlets of interlock foot valve (9) are connected with the second brake circuit oil inlet (12) with the first brake circuit oil inlet (10) respectively; The oil outlet of sequence valve (3) is connected with pilot control oil circuit oil inlet (15) with the oil inlet of by pass valve (14), and the drain tap of sequence valve (3) is connected with the oil inlet of 2/2-way change-over valve (13); The oil outlet of reducing valve (2) is connected with the oil inlet of two-bit triplet electromagnetic valve (16), and the oil outlet of two-bit triplet electromagnetic valve (16) is connected with the oil inlet (17) of braking during standstill oil circuit, drain tap and the check valve of two-bit triplet electromagnetic valve (16)
(18) oil inlet connects; Drain tap, the oil outlet of 2/2-way change-over valve (13), oil outlet and the check valve of by pass valve (14) of interlock foot valve (9)
(18) oil outlet is all connected with tank drainback mouth (20).
2. a kind of wheeled hydraulic excavator topping up brake activation valve group according to claim 1, is characterized in that, also comprise signalling generator (22), signalling generator (22) is in parallel with filter (19).
3. a kind of wheeled hydraulic excavator topping up brake activation valve group according to claim 1 and 2, is characterized in that, also comprise normally closed pressure switch (1), normally closed pressure switch (1) is connected with the oil inlet of energy storage (5).
4. a kind of wheeled hydraulic excavator topping up brake activation valve group according to claim 1 and 2, it is characterized in that, also comprise pressure switch open in usual (11), pressure switch open in usual (11) arranges two, in parallel with the first brake circuit oil inlet (10) and the second brake circuit oil inlet (12) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320610360.4U CN203580932U (en) | 2013-09-30 | 2013-09-30 | Charging brake valve set of wheel type hydraulic shovel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320610360.4U CN203580932U (en) | 2013-09-30 | 2013-09-30 | Charging brake valve set of wheel type hydraulic shovel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203580932U true CN203580932U (en) | 2014-05-07 |
Family
ID=50578891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320610360.4U Expired - Lifetime CN203580932U (en) | 2013-09-30 | 2013-09-30 | Charging brake valve set of wheel type hydraulic shovel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203580932U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960517A (en) * | 2015-07-08 | 2015-10-07 | 安徽合力股份有限公司 | Integrated valve block for hydraulic braking system of empty-container stacking machine |
| CN105000008A (en) * | 2015-07-13 | 2015-10-28 | 青岛四方车辆研究所有限公司 | Active tram hydraulic braking system with high speed switch valve |
| CN113682289A (en) * | 2021-09-28 | 2021-11-23 | 国能神东煤炭集团有限责任公司 | Support vehicle braking system and support vehicle |
-
2013
- 2013-09-30 CN CN201320610360.4U patent/CN203580932U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960517A (en) * | 2015-07-08 | 2015-10-07 | 安徽合力股份有限公司 | Integrated valve block for hydraulic braking system of empty-container stacking machine |
| CN105000008A (en) * | 2015-07-13 | 2015-10-28 | 青岛四方车辆研究所有限公司 | Active tram hydraulic braking system with high speed switch valve |
| CN105000008B (en) * | 2015-07-13 | 2019-02-15 | 中车青岛四方车辆研究所有限公司 | The active tramcar brake fluid system of high-speed switch valve |
| CN113682289A (en) * | 2021-09-28 | 2021-11-23 | 国能神东煤炭集团有限责任公司 | Support vehicle braking system and support vehicle |
| CN113682289B (en) * | 2021-09-28 | 2022-05-20 | 国能神东煤炭集团有限责任公司 | Support vehicle braking system and support vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |