CN208760600U - The urgent auxiliary braking system of engineering truck - Google Patents
The urgent auxiliary braking system of engineering truck Download PDFInfo
- Publication number
- CN208760600U CN208760600U CN201820932273.3U CN201820932273U CN208760600U CN 208760600 U CN208760600 U CN 208760600U CN 201820932273 U CN201820932273 U CN 201820932273U CN 208760600 U CN208760600 U CN 208760600U
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- CN
- China
- Prior art keywords
- valve
- brake
- air accumulator
- checking cylinder
- engineering truck
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The utility model discloses a kind of urgent auxiliary braking system of engineering truck, including air accumulator, brake pedal valve and checking cylinder and transfer emergency valve, high pressure gas in the air accumulator passes through brake pedal valve and transfer emergency valve respectively and the big chamber of checking cylinder connects, the small chamber of the checking cylinder is connect with brake circuit, and braking oil liquid acts on the service brake that rim brake realizes engineering truck.The utility model has the advantages that the utility model can realize automatic detection braking pressure, automatic braking is realized when being lower than safe air pressure, it is easy to operate, safe and reliable, the safety accident caused by the failure of engineering truck service braking system can be effectively prevented from.
Description
Technical field
The utility model relates to a kind of braking system, in particular to a kind of engineering truck of in case of emergency automatic braking
Urgent auxiliary braking system, belongs to technical field of engineering machinery.
Background technique
With the continuous promotion of people's awareness of safety, operator is to the security performance especially braking system of engineering machinery
It is required that it is also higher and higher, it is especially higher in requirement of the engineering truck of the operation of overhanging cliff side or traveling to braking system.?
For winding road traveling due to the descending that constantly goes up a slope, driver can frequently use braking system.The braking of engineering truck generallys use
It is the mode of braking of gas cap oil, i.e. the big chamber of checking cylinder is connected to high pressure gas, and small chamber is connected to the hydraulic circuit of braking, passes through height
The piston motion of gas push checking cylinder is pressed to realize the service brake of vehicle.However it is from the gas that air compressor machine enters in air accumulator
High temperature, high pressure, in air accumulator lasting high temperature, high pressure gas make the sealing element that is connected with air accumulator, hose using it is long when
Between after will appear the risk that aging causes air accumulator gas leakage that can not brake.
The existing vehicle braking of engineering truck includes service braking system and urgent & parking brake system.Service brake
System is for the braking during vehicle traveling, and urgent & parking brake system is for the parking braking after vehicle parking, it is also possible to
Emergency braking when vehicle service brake is broken down.
It can only realize the braking of vehicle when there is above-mentioned service brake failure using emergency braking measure by operator.
Since emergency braking is the spragging gear that brake force is directly acted on to gearbox, the biggish engineering truck of complete vehicle quality is come
It says, greater impact will certainly be caused to the gear mechanism in gearbox, or even cause the damage of gear mechanism, generate biggish warp
Ji loss；And in vehicle service brake failure, biggish security risk can be generated, operator can be in the case where critical
Many emergency measures are taken, if emergency measure uses the improper tragedy for being likely to car crash occur.
Summary of the invention
Goal of the invention: in order to prevent when the service braking system failure of engineering truck, air pressure drops to safety value or less and produces
Raw security risk, a kind of engineering truck that can drop to the preceding realization automatic braking of safety value or less in braking pressure provided are tight
Anxious auxiliary braking system.
Technical solution: a kind of urgent auxiliary braking system of engineering truck, including air accumulator, brake pedal valve and checking cylinder with
And transfer emergency valve, the high pressure gas in the air accumulator pass through the big of brake pedal valve and transfer emergency valve and checking cylinder respectively
Chamber connection, the small chamber of the checking cylinder are connect with brake circuit, and braking oil liquid acts on rim brake and realizes engineering truck
Service brake.When pressure of the pressure in air accumulator lower than the setting of transfer emergency valve, transfer meets an urgent need valve events directly by gas storage
Automatic braking is realized in the connection of the big chamber of tank and checking cylinder, avoids the generation of security risk.
Preference, in order to safely and reliably realize emergency brake function, the transfer emergency valve includes middle rotary valve, answers
Anxious valve and check valve, the air accumulator have the control gas circuit of spring side to be connected to by brake pedal valve with middle rotary valve；The storage
Simultaneously with d mouthfuls of the air inlet of emergency valve and without the control air circuit connection of spring side, gas outlet f mouthfuls of the emergency valve divides gas tank
Do not connect with middle rotary valve without the control gas circuit and check valve inlet of spring side, the gas outlet of check valve and air accumulator simultaneously with
K mouthfuls of air inlet connections of middle rotary valve, gas outlet h mouthfuls of the middle rotary valve connect with the big chamber of checking cylinder.
When air accumulator air pressure normal vehicle normal brake application, operator's brake pedal, air accumulator has with middle rotary valve
The control gas circuit of spring side is connected to, since the control gas circuit without spring side of emergency valve is connected to air accumulator, in air accumulator
Air pressure be greater than the spring pressure of emergency valve, emergency valve be in normal open state, thus middle rotary valve without spring side control gas circuit
It is connected to by emergency valve with air accumulator, middle rotary valve two sides control gas circuit is connected to air accumulator simultaneously, in the effect of transfer valve spring
K mouthfuls of air inlet of rotary valve are connected to gas outlet h mouthfuls in lower, and air accumulator, which is directly connect with the big chamber of checking cylinder, realizes the normal of vehicle
Braking.
When the air pressure in air accumulator is lower than setting safety value, the spring force of emergency valve is greater than the control pressure of emergency valve,
Emergency valve events have cut off air accumulator and control gas circuit of the middle rotary valve without spring side, and middle rotary valve controls gas circuit without spring side
It is communicated with the atmosphere；Middle rotary valve has the control gas circuit of spring side to connect with the gas outlet of brake pedal valve, when not stepping on pedal
Middle rotary valve has the control gas circuit of spring side to be communicated with the atmosphere by brake pedal valve, and middle rotary valve two sides are communicated with the atmosphere simultaneously,
K mouthfuls of the air inlet of middle rotary valve is connected to gas outlet h mouthfuls under the action of transfer valve spring force, and air accumulator is directly big with checking cylinder
The emergency brake of vehicle is realized in chamber connection.
Preference, in order to prevent checking cylinder failure cause safety accident, and the checking cylinder includes front wheel brake cylinder and rear-wheel
Checking cylinder, the front wheel brake cylinder and rear-wheel cylinder are respectively to front and back brake circuit fuel feeding.By using front and back checking cylinder point
A possibility that other mode for implementing braking to front and back wheel, two checking cylinders fail simultaneously, is lower, reduces checking cylinder failure and causes
The probability of serious consequence.
The utility model has the advantages that the utility model can realize automatic detection braking pressure, when being lower than safe air pressure, easy to operate,
Securely and reliably, the safety accident caused by the failure of engineering truck service braking system can be effectively prevented from.
Detailed description of the invention
Fig. 1 is the hydraulic schematic diagram of the utility model.
Specific embodiment
With reference to the accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of urgent auxiliary braking system of engineering truck, including air accumulator 1, brake pedal valve 2 and braking
Cylinder 3 and transfer emergency valve 4, the high pressure gas in the air accumulator 1 pass through respectively brake pedal valve 2 and transfer emergency valve 4 with
The big chamber of checking cylinder 3 connects, and the small chamber of the checking cylinder 3 is connect with brake circuit, and braking oil liquid acts on rim brake reality
The service brake of existing engineering truck.When the pressure in air accumulator 1 is lower than the pressure that transfer emergency valve 4 is set, transfer emergency valve 4
Air accumulator 1 directly connect with the big chamber of checking cylinder 3 and realizes automatic braking by movement, avoids the generation of security risk.
In order to safely and reliably realize emergency brake function, the transfer emergency valve 4 includes middle rotary valve 41, emergency valve
42 and check valve 43, the air accumulator 1 has the control gas circuit of spring side to be connected to by brake pedal valve 2 with middle rotary valve 41；Institute
Air accumulator 1 is stated simultaneously with d mouthfuls of the air inlet of emergency valve 42 and without the control air circuit connection of spring side, and the emergency valve 42 goes out
The control gas circuit with middle rotary valve 41 without spring side and 43 air inlet of check valve are connect f mouthfuls of port respectively, the outlet of check valve 43
Mouthful and air accumulator 1 while being connect with k mouthfuls of air inlet of middle rotary valve 41, gas outlet h mouthfuls of the middle rotary valve 41 with checking cylinder 3
Big chamber connection.
When 1 air pressure normal vehicle normal brake application of air accumulator, operator's brake pedal, air accumulator 1 and middle rotary valve
41 have the control gas circuit of spring side to be connected to, since the control gas circuit without spring side of emergency valve 42 is connected to air accumulator 1, storage
Air pressure in gas tank 1 is greater than the spring pressure of emergency valve 42, and emergency valve 42 is in normal open state, thus middle rotary valve 41 without bullet
Spring side control gas circuit is connected to by emergency valve 42 with air accumulator 1, and middle 41 two sides of rotary valve control gas circuit connects with air accumulator 1 simultaneously
Logical, k mouthfuls of the air inlet of middle rotary valve 41 is connected to gas outlet h mouthfuls under the action of middle 41 spring of rotary valve, air accumulator 1 directly with braking
The normal brake application of vehicle is realized in the big chamber connection of cylinder 3.
When the air pressure in air accumulator 1 is lower than setting safety value, the spring force of emergency valve 42 is greater than the control of emergency valve 42
Air accumulator 1 and control gas circuit of the middle rotary valve 41 without spring side have been cut off in air pressure, the movement of emergency valve 42, middle rotary valve 41 without spring
Side control gas circuit is communicated with the atmosphere；Middle rotary valve 41 has the control gas circuit of spring side to connect with the gas outlet of brake pedal valve 2,
Rotary valve 41 has the control gas circuit of spring side to be communicated with the atmosphere by brake pedal valve 2 in when not stepping on pedal, middle rotary valve 41
Two sides are communicated with the atmosphere simultaneously, k mouthfuls of the air inlet of middle rotary valve 41 and gas outlet h mouthfuls of company under the action of middle 41 spring force of rotary valve
Logical, air accumulator 1 directly connect the emergency brake for realizing vehicle with the big chamber of checking cylinder 3.
The failure of checking cylinder 3 causes safety accident in order to prevent, and the checking cylinder 3 includes front wheel brake cylinder 31 and rear service brake
Cylinder 32, the front wheel brake cylinder 31 and rear-wheel cylinder 32 are respectively to front and back brake circuit fuel feeding.By using front and back checking cylinder
A possibility that mode braked respectively to front and back wheel implementation, two checking cylinders fail simultaneously, is lower, reduces checking cylinder failure and makes
At the probability of serious consequence.
Claims (3)
1. a kind of urgent auxiliary braking system of engineering truck, including air accumulator (1), brake pedal valve (2) and checking cylinder (3), institute
The high pressure gas stated in air accumulator (1) is connected to by brake pedal valve (2) with the big chamber of checking cylinder (3), the checking cylinder (3)
Small chamber is connect with brake circuit, it is characterised in that: and it further include transfer emergency valve (4), the air accumulator (1) and brake pedal valve
(2) it is connect respectively by transfer emergency valve (4) with the big chamber of checking cylinder (3).
2. the urgent auxiliary braking system of engineering truck according to claim 1, it is characterised in that: the transfer emergency valve
It (4) include middle rotary valve (41), emergency valve (42) and check valve (43), the air accumulator (1) passes through brake pedal valve (2) and transfer
Valve (41) has the control gas circuit of spring side to be connected to；The air accumulator (1) is simultaneously with d mouthfuls of the air inlet of emergency valve (42) and without bullet
The control air circuit connection of spring side, gas outlet f mouthfuls of the emergency valve (42) respectively with the control of middle rotary valve (41) without spring side
Gas circuit processed is connected with check valve (43) air inlet, the gas outlet of check valve (43) and air accumulator (1) simultaneously with middle rotary valve (41)
K mouthfuls of air inlet connections, gas outlet h mouthfuls of the middle rotary valve (41) are connect with the big chamber of checking cylinder (3).
3. the urgent auxiliary braking system of engineering truck according to claim 1, it is characterised in that: checking cylinder (3) packet
Front wheel brake cylinder (31) and rear-wheel cylinder (32) are included, the front wheel brake cylinder (31) and rear-wheel cylinder (32) are respectively to front and back
Brake circuit fuel feeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820932273.3U CN208760600U (en) | 2018-06-15 | 2018-06-15 | The urgent auxiliary braking system of engineering truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820932273.3U CN208760600U (en) | 2018-06-15 | 2018-06-15 | The urgent auxiliary braking system of engineering truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208760600U true CN208760600U (en) | 2019-04-19 |
Family
ID=66127746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820932273.3U Expired - Fee Related CN208760600U (en) | 2018-06-15 | 2018-06-15 | The urgent auxiliary braking system of engineering truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208760600U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108725418A (en) * | 2018-06-15 | 2018-11-02 | 江苏柳工机械有限公司 | The urgent auxiliary braking system of engineering truck |
-
2018
- 2018-06-15 CN CN201820932273.3U patent/CN208760600U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108725418A (en) * | 2018-06-15 | 2018-11-02 | 江苏柳工机械有限公司 | The urgent auxiliary braking system of engineering truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190419 Termination date: 20210615 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |