CN1408600A - Heavy truck power steering double loop hydraulic booster system - Google Patents
Heavy truck power steering double loop hydraulic booster system Download PDFInfo
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- CN1408600A CN1408600A CN 02135345 CN02135345A CN1408600A CN 1408600 A CN1408600 A CN 1408600A CN 02135345 CN02135345 CN 02135345 CN 02135345 A CN02135345 A CN 02135345A CN 1408600 A CN1408600 A CN 1408600A
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- steering
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- valve
- hydraulic booster
- power steering
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- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
The present invention belongs to the field of hydraulic booster technology for truck steering control. Of the heavy truck powre steering double-lop hydraulic booster system, each steering axle has two steering booster oil cylinders installed to constitute two separate loops; the main pump is one twin pump with two single pumps to provide power to the two loops separately; and each loop has steering oil cylinder, main pump, overflow flow rate valve, flow rate indicating valve, powered steering device, damping valve and steering booster oil cylinder connected successively; and two loops are linked via the two distributing valves in the powered steering devices. One of the loops has emergency valve to constitute combined oil path together with the emergency pump.
Description
(1) technical field
The invention belongs to the operating hydraulically operated power-assisted technical field of motor turning, particularly a kind of multi-axle steering hydraulic booster power steering system.
(2) background technology
The steering swivel system of automobile should be able to guarantee vehicle straight-line travelling reposefully, and can require to change easily flexibly travel direction according to vehicle '.The heavy motor vehicle that many bridges turn to, the mode that must adopt a plurality of steeraxles to turn to synchronously, common double loop hydraulic booster system, two loops are controlled respectively by two oil pumps, its power-assisted oil cylinder is installed on the drag link leverage direction, because the heavy motor vehicle that turns to of many bridges adopts wide-section tyre, when on the relatively poor road surface of grade, using, turn to generally heavy.And the speciality car that military vehicle, hoister in large tonnage etc. turn to more than two bridges has higher requirement to sensitieness, stability, the safety of handling maneuver system, and common double loop power steering hydraulic efficiency pressure system then is difficult to satisfy its requirement.
(3) summary of the invention
At the deficiencies in the prior art, the object of the present invention is to provide a kind of multi-axle steering autotruck requirement of being suitable for, working stability, handle sensitive light, safe and reliable double loop hydraulic booster power steering system.
The object of the present invention is achieved like this:
Heavy truck power steering double loop hydraulic booster system of the present invention, two steering jacks are installed respectively on each steeraxle, form two loops respectively, main pump has two single pumps, provide power to two loops respectively, be connected with steering oil reservoir, main pump, excess flow valve, flow indicator valve, power steering, steering jack in each loop in turn, by the interlock of two distributing valves in the power steering, realize the interlock in two loops between two loops; One of them loop is serially connected with urgent guard valve, incorporates jury pump into and forms the combination oil circuit.
Heavy truck power steering double loop hydraulic booster system of the present invention further improves, and is that the steering jack of double loop hydraulic booster system is installed in and turns to sedan-chair top on the tierod direction, like this, handling maneuver power is less, turns to sensitivity, has overcome lacking of hard steering.
Because interlock, and realize linking by two distributing valves in the deflector between two loops, and separate between two loops.Make the steering swivel system working stability, safe and reliable.
During this force aid system normal operation, work respectively in two loops.Break down when one the road, other one the tunnel can independently finish power steering.During combination oil circuit normal operation, main pump work, to the steering jack fuel feeding, the jury pump fuel feeding is through urgent guard valve off-load oil sump tank through urgent guard valve.If the main pump oil circuit breaks down, when flow system flow was lower than urgent guard valve set flow, urgent guard valve effect was switched, and jury pump is supplied with the enough oil masses of combination oil circuit, realizes emergent turning to.All have simultaneously flow indication prior-warning device in each loop, when the flow in the oil circuit was lower than setting, indication was reported to the police, so that on-call maintenance.Therefore, this system has double insurance, has higher safe reliability.
Heavy truck power steering double loop hydraulic booster system of the present invention is equipped with dash pot valve between power steering and steering jack, can alleviate the road surface and the power-assisted oil cylinder be impacted the too quickly impact to the chaufeur feel that brings.The excess flow valve limits the maximum functional flow, and power steering pressure inside by pass valve limits the operation pressure in two loops.Make steering boost system, working stability.
Therefore, the present invention has working stability, handles sensitive light, safe and reliable advantage.
(4) description of drawings
Accompanying drawing is a block diagram of the present invention
Among the figure, 1,15,16 is steering oil reservoir, and 2 is oil pump, and 3 is the excess flow valve, and 4 is the flow indicator valve, and 5 is power steering, and 6 is dash pot valve, and 7,8,9,10,11,12 is steering jack, and 13 is urgent guard valve, and 14 is jury pump
(5) specific embodiment
Embodiments of the invention as shown in the figure, this system is double loop hydraulic booster permanent current half a separated type power steering system.Main pump 2 is driven by driving engine for twin pump, and jury pump 14 is driven by auxiliary gear box.Steering jack 7 and 12,8 and 11,9 and 10 is installed in respectively on the steeraxle, forms two loops, realizes the steering hydraulic power-assisted.Two single pumps of main pump 2 are respectively two loops power are provided, and by the interlock of power steering 5 in-to-ins two distributing valves, realize the interlock in two loops between two loops.In loop, urgent guard valve 13 is housed therein, incorporates jury pump 14 into, form the combination oil circuit.During normal operation, two loops are separate, work respectively.Break down when one the road, other one the tunnel can independently finish power steering.During combination oil circuit normal operation, main pump 2 work, to the steering jack fuel feeding, the urgent guard valve 13 off-loads revolution of jury pump 14 fuel feeding warp is to oil tank 16 through urgent guard valve 13.If main pump 2 place oil circuits break down, when flow system flow was lower than urgent guard valve 13 set flows, urgent guard valve 13 effects were switched, and jury pump 14 is supplied with the enough oil masses of combination oil circuits, realizes emergent turning to.Simultaneously all have flow indicator valve 4 in each loop, when the flow in the oil circuit was lower than setting, the flow indication was reported to the police, so that on-call maintenance. Steering oil reservoir 1,15,16 is main pump 2, jury pump 14 fuel feeding respectively, makes two loop oil sources supply with and is independent of each other.Dash pot valve 6 is housed in the system, can alleviates the road surface and steering jack be impacted the too quickly impact that brings the chaufeur feel.System limits the maximum functional flow by excess flow valve 3, and there are two Pressure relief valves deflector 5 inside, limit the operation pressure in two loops with this.Each loop of double loop hydraulic booster system is separate, control a group oil cylinder respectively, cornering resistance is mainly overcome by hydraulic booster system, and this makes that the force-bearing situation of steering gear connection is better, and light sensitivity, safe and reliable is stablized, handled in the common double loop of turning rate.
Claims (3)
1. heavy truck power steering double loop hydraulic booster system, two steering jacks are installed respectively on each steeraxle, form two loops respectively, main pump (2) has two single pumps, provide power to two loops respectively, be connected with steering oil reservoir, main pump, excess flow valve, flow indicator valve, power steering, steering jack in each loop in turn, it is characterized in that: by the interlock of two distributing valves in the power steering (5), realize the interlock in two loops between two loops; One of them loop is serially connected with urgent guard valve (13), incorporates jury pump (14) into and composition combination oil circuit.
2. heavy truck power steering double loop hydraulic booster system according to claim 1 is characterised in that: the steering jack of double loop hydraulic booster system is installed in and turns to sedan-chair top on the tierod direction.
3. heavy truck power steering double loop hydraulic booster system according to claim 1 and 2 is characterised in that: between power steering and the steering jack dash pot valve is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02135345 CN1408600A (en) | 2002-08-06 | 2002-08-06 | Heavy truck power steering double loop hydraulic booster system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02135345 CN1408600A (en) | 2002-08-06 | 2002-08-06 | Heavy truck power steering double loop hydraulic booster system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1408600A true CN1408600A (en) | 2003-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02135345 Pending CN1408600A (en) | 2002-08-06 | 2002-08-06 | Heavy truck power steering double loop hydraulic booster system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1408600A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535574A (en) * | 2012-01-17 | 2012-07-04 | 中钢集团衡阳重机有限公司 | Hydraulic control system for scooptram |
| CN103043095A (en) * | 2012-12-27 | 2013-04-17 | 三一重工股份有限公司 | Steering pump, steering device, steering system and automobile |
| CN103552601A (en) * | 2013-11-07 | 2014-02-05 | 邓平 | Hydraulic steering boosting system with automatic repair function and control method |
| CN114312994A (en) * | 2022-01-10 | 2022-04-12 | 中国重汽集团济南动力有限公司 | Hydraulic steering power assisting device and system for multi-shaft vehicle |
-
2002
- 2002-08-06 CN CN 02135345 patent/CN1408600A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535574A (en) * | 2012-01-17 | 2012-07-04 | 中钢集团衡阳重机有限公司 | Hydraulic control system for scooptram |
| CN102535574B (en) * | 2012-01-17 | 2015-01-07 | 中钢集团衡阳重机有限公司 | Hydraulic control system for scooptram |
| CN103043095A (en) * | 2012-12-27 | 2013-04-17 | 三一重工股份有限公司 | Steering pump, steering device, steering system and automobile |
| CN103043095B (en) * | 2012-12-27 | 2016-02-10 | 三一汽车制造有限公司 | Steering pump, deflector, steering swivel system and vehicle |
| CN103552601A (en) * | 2013-11-07 | 2014-02-05 | 邓平 | Hydraulic steering boosting system with automatic repair function and control method |
| CN103552601B (en) * | 2013-11-07 | 2016-04-13 | 邓平 | There is the fluid-link steering control method automatically remedying function |
| CN114312994A (en) * | 2022-01-10 | 2022-04-12 | 中国重汽集团济南动力有限公司 | Hydraulic steering power assisting device and system for multi-shaft vehicle |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |