CN202879461U - Purely hydraulic parking braking system - Google Patents
Purely hydraulic parking braking system Download PDFInfo
- Publication number
- CN202879461U CN202879461U CN 201220566291 CN201220566291U CN202879461U CN 202879461 U CN202879461 U CN 202879461U CN 201220566291 CN201220566291 CN 201220566291 CN 201220566291 U CN201220566291 U CN 201220566291U CN 202879461 U CN202879461 U CN 202879461U
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- valve
- hydraulic
- parking brake
- check valve
- braking
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Abstract
The utility model discloses a purely hydraulic parking braking system which comprises a parking brake, a hydraulic pump, a prefill valve, a manual pump, a first check valve, a pressure gage, a second check valve, an overflow valve and a manual control reversing valve, wherein an engine is connected with the hydraulic pump, the hydraulic pump is connected with the prefill valve, the manual pump and the first check valve in sequence, the manual control reversing valve is connected with the parking brake, the pressure gage is arranged between the manual pump and the first check valve, and the second check valve and the overflow valve are arranged between the prefill valve and the manual control reversing valve. The parking brake is a normally closed multi-disks wet-type parking brake. Wet-type braking enables a finished automobile work hydraulic system and a braking hydraulic system to form a whole. The connection of the prefill valve solves the problem of source of full hydraulic parking braking hydraulic sources. The purely hydraulic parking braking system has the advantages of simplifying pipeline system, being simple in structure and convenient to operate, reducing cost, being stable and rapid in braking, having good practicability, and being capable of being used in anti-explosion trackless rubber-tyred vehicles for coal mines.
Description
Technical field
The utility model relates to a kind of emergency brake system, is specifically related to a kind of for the pure hydraulic parking braking system on the mine anti-explosion articulator.
Background technology
At present, pure hydraulic parking braking system needing to be widely used on the vehicle of the large or work under bad environment of lock torque in recent years.Compare with the parking brake parking system of transmission, it is large that pure hydraulic parking braking system has a lock torque, advantages such as brake safe is reliable, thereby adopted by engineering truck more and more widely, also so the engineering truck that also more and more is widely used in coal mine operation adopt.But the pure hydraulic parking braking system on the existing mine anti-explosion articulator, complex structure, cost is high, easy-maintaining not, the braking stationarity is poor.
The utility model content
Goal of the invention: for the problem and shortage that above-mentioned prior art exists, the purpose of this utility model provide a kind of compact conformation, easy to maintenance, cost is low, braking pure hydraulic parking braking system more stably.
Technical scheme: for achieving the above object, the technical solution adopted in the utility model is:
A kind of pure hydraulic parking braking system comprises Parking Brake, Hydraulic Pump, prefill valve, manual pump, check valve one, compression indicator, check valve two, by pass valve and hand control change-over valve; Driving engine is connected with described Hydraulic Pump; Hydraulic Pump is connected with prefill valve in turn, manual pump, and check valve one, hand control change-over valve is connected to Parking Brake; Be provided with compression indicator between manual pump and the check valve one; Check valve two, by pass valve are arranged between prefill valve and the hand control change-over valve.
Described Parking Brake is normally closed multi-disc wet type Parking Brake; Parking Brake is the power element of whole emergency brake system.
Described by pass valve is used for the pressure rating that control distributes the pressure oil of coming to be input to Parking Brake from prefill valve, optimization, pressure is controlled at 3-5Mpa, played preferably protective effect.
Principle of work: engine starting drives hydraulic pump works, Hydraulic Pump inputs to prefill valve with hydraulic oil, prefill valve with hydraulic oil distribution to Parking Brake, must be through check valve in this process, pressure rating by by pass valve control hydraulic oil, to Parking Brake, Parking Brake is in the brake off state through hand control change-over valve.When vehicle stop work, engine off, chaufeur can be controlled hand control change-over valve, and the hydraulic oil in the Parking Brake is through manual change-over valve oil return at this moment, and Parking Brake is implemented braking during standstill.When vehicle stop is worked, remove braking during standstill such as need, chaufeur can be handled manual pump.Hand control change-over valve must be resetted and note that observing manometric numerical value can not surpass 5Mpa before handling manual pump, input Parking Brake, Parking Brake brake off from the hydraulic oil of manual pump through check valve and hand control change-over valve this moment.Prefill valve has played the effect of hinge in whole brake system, the pressure oil of in the future self-hydraulic pump conveying is distributed to the hydraulic subsystem in downstream, wherein distributes to the braking during standstill hydraulic subsystem with part, and this just solves the source problem that comes of braking liquid potential source.
Beneficial effect: compared with prior art, pure hydraulic parking braking of the present utility model system, adopt normally closed multi-disc wet type Parking Brake, for coal mine explosion-proof railless free-wheeled vehicle wet braking provides effective solution, so that car load hydraulic system of working and hydraulic braking system become an organic whole; Expand the use function of prefill valve, solved the source problem that comes of all-hydraulic braking during standstill hydraulic power source, simplified pipeline system, simple in structure, easy to operate, reduced the cost of development of complete machine; Adopt hydraulic coupling to control, so that the enforcement of braking during standstill and releasing become more steadily and be rapid; Has good practicality.
Description of drawings
Fig. 1 is the principle schematic of pure hydraulic parking braking system.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further specified.Should understand these embodiment only is used for explanation the utility model and is not used in restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.
As shown in Figure 1, pure hydraulic parking braking system comprises Parking Brake, Hydraulic Pump 1, prefill valve 2, manual pump 3, check valve 1, compression indicator 5, check valve 26, by pass valve 7 and hand control change-over valve 8; Driving engine is connected with Hydraulic Pump 1; Hydraulic Pump 1 is connected with prefill valve 2 in turn, manual pump 3, and check valve 1, hand control change-over valve 8 is connected to Parking Brake; Be provided with compression indicator 5 between manual pump 3 and the check valve 1; Check valve 26, by pass valve 7 are arranged between prefill valve 2 and the hand control change-over valve 8.
Parking Brake is normally closed multi-disc wet type Parking Brake; Parking Brake is the power element of whole emergency brake system.
By pass valve 7 is used for the pressure rating that control distributes the pressure oil of coming to be input to Parking Brake from prefill valve, optimization, pressure is controlled at 3-5Mpa, played preferably protective effect.
Engine starting drives hydraulic pump works, Hydraulic Pump inputs to prefill valve with hydraulic oil, prefill valve with hydraulic oil distribution to Parking Brake, must be through check valve in this process, pressure rating by by pass valve control hydraulic oil, to Parking Brake, Parking Brake is in the brake off state through hand control change-over valve.When vehicle stop work, engine off, chaufeur can be controlled hand control change-over valve, and the hydraulic oil in the Parking Brake is through manual change-over valve oil return at this moment, and Parking Brake is implemented braking during standstill.When vehicle stop is worked, remove braking during standstill such as need, chaufeur can be handled manual pump.Hand control change-over valve must be resetted and note that observing manometric numerical value can not surpass 5Mpa before handling manual pump, input Parking Brake, Parking Brake brake off from the hydraulic oil of manual pump through check valve and hand control change-over valve this moment.Prefill valve has played the effect of hinge in whole brake system, the defeated pressure oil of self-hydraulic pump is distributed to the hydraulic subsystem in downstream in the future, wherein distributes to the braking during standstill hydraulic subsystem with part, and this just solves the source problem that comes of braking liquid potential source.
This pure hydraulic parking braking system adopts normally closed multi-disc wet type Parking Brake, for coal mine explosion-proof railless free-wheeled vehicle wet braking provides effective solution, so that car load hydraulic system of working and hydraulic braking system become an organic whole; Expand the use function of prefill valve, solved the source problem that comes of all-hydraulic braking during standstill hydraulic power source, simplified pipeline system, simple in structure, easy to operate, reduced the cost of development of complete machine; Adopt hydraulic coupling to control, so that the enforcement of braking during standstill and releasing become more steadily and be rapid; Has good practicality.
Claims (2)
1. a pure hydraulic parking braking system is characterized in that: comprise Parking Brake, Hydraulic Pump (1), prefill valve (2), manual pump (3), check valve one (4), compression indicator (5), check valve two (6), by pass valve (7) and hand control change-over valve (8); Driving engine is connected with described Hydraulic Pump (1); Described Hydraulic Pump (1) is connected with prefill valve (2), manual pump (3), check valve one (4), hand control change-over valve (8) in turn, is connected to Parking Brake; Be provided with compression indicator (5) between described manual pump (3) and the check valve one (4); Described check valve two (6), by pass valve (7) are arranged between prefill valve (2) and the hand control change-over valve (8).
2. pure hydraulic parking braking according to claim 1 system, it is characterized in that: described Parking Brake is normally closed multi-disc wet type Parking Brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220566291 CN202879461U (en) | 2012-10-31 | 2012-10-31 | Purely hydraulic parking braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220566291 CN202879461U (en) | 2012-10-31 | 2012-10-31 | Purely hydraulic parking braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202879461U true CN202879461U (en) | 2013-04-17 |
Family
ID=48070919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220566291 Expired - Fee Related CN202879461U (en) | 2012-10-31 | 2012-10-31 | Purely hydraulic parking braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202879461U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109435928A (en) * | 2018-12-29 | 2019-03-08 | 徐工集团工程机械股份有限公司 | A kind of unmanned vehicle electro-hydraulic brake system |
-
2012
- 2012-10-31 CN CN 201220566291 patent/CN202879461U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109435928A (en) * | 2018-12-29 | 2019-03-08 | 徐工集团工程机械股份有限公司 | A kind of unmanned vehicle electro-hydraulic brake system |
| CN109435928B (en) * | 2018-12-29 | 2024-04-30 | 徐工集团工程机械股份有限公司 | Unmanned vehicle electrohydraulic braking system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20141031 |
|
| EXPY | Termination of patent right or utility model |