CN201850487U - Hydraulic steering system of double-steel-wheel road roller - Google Patents
Hydraulic steering system of double-steel-wheel road roller Download PDFInfo
- Publication number
- CN201850487U CN201850487U CN2010205964195U CN201020596419U CN201850487U CN 201850487 U CN201850487 U CN 201850487U CN 2010205964195 U CN2010205964195 U CN 2010205964195U CN 201020596419 U CN201020596419 U CN 201020596419U CN 201850487 U CN201850487 U CN 201850487U
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- control valve
- mouth
- valve
- road roller
- steering system
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Abstract
The utility model discloses a hydraulic steering system of a double-steel-wheel road roller, which belongs to the technical field of engineering machinery, and comprises a gear pump, a control valve, an electromagnetic directional valve, two bidirectional cushion valves connected with an oil path, a first steering cylinder and a second steering cylinder connected with the control valve, a first crab type travel cylinder and a second crab type travel cylinder connected with the control valve; the gear pump is mounted in a pipeline from an oil tank to the control valve to supply oil to a whole loop; a T1 port of the control valve is connected with the oil tank; an L port of the control valve is connected with a P2 port of the electromagnetic directional valve; and a R port of the control valve is connected with a T2 port of the electromagnetic directional valve. The steering and crab type travel modes of the double steel wheel road roller are selected through controlling a power-off and electrified operation steering wheel of the electromagnetic directional valve. When two groups of cylinders are impacted by barriers during steering, the bidirectional cushion valves timely carry out reduction pressure and unload to play the role of protecting the cylinders. The hydraulic steering system of the double-steel-wheel road roller has the benefits of not only being capable of realizing the two modes comprising steering and crab type travel, but also being simple in operation, and improving the working performance of the road roller.
Description
Technical field
The utility model relates to a kind of hydraulic steering system, specifically is a kind of dual-steel wheel road roller hydraulic steering system, belongs to technical field of engineering machinery.
Background technology
Two steel wheels series vibratory rollers are the main types that are used for high-grade asphalt concrete pavement compacting, along with the requirement of pavement of road construction technology is more and more higher, the function and the operating aspect of this series vibratory roller have been had higher requirement.
Existing double-steel wheeled vibratory roller generally possesses and turns to and two kinds of patterns of crab row, and configuration aspects need generally be to adopt two articulated structures, turns to the crab row mode and mainly realizes by hydraulic steering system.Turn to the realization with the crab row mode in the existing hydraulic steering system,, cause operating efficiency to reduce owing to the reason operation logic relation of hydraulic steering system principle is complicated.
Summary of the invention
At the problem that above-mentioned prior art exists, the utility model provides a kind of dual-steel wheel road roller hydraulic steering system, realizes turning to and two kinds of patterns of crab row of dual-steel wheel road roller, and improves this two kinds of patterns, makes it easy and simple to handle.
The technical solution adopted in the utility model is: a kind of dual-steel wheel road roller hydraulic steering system, it is characterized in that hydraulic steering system comprise gear pump, control valve, solenoid operated directional valve, the first bidirectional buffering valve, the second bidirectional buffering valve, be connected with the A1 mouth of control valve first turn to oil cylinder, be connected with the B1 mouth of control valve second turn to oil cylinder, first crab row oil cylinder that is connected with the A2 mouth of control valve and the capable oil cylinder of second crab that is connected with the B2 mouth of control valve; Gear pump be installed in fuel tank to the pipeline of control valve to whole loop fuel feeding; The T1 mouth of control valve is connected with fuel tank, the L mouth of control valve is connected with the P2 mouth of solenoid operated directional valve, the R mouth of control valve is connected with the T2 mouth of solenoid operated directional valve, and the first bidirectional buffering valve is connected between oil duct a and the oil duct b, and the second bidirectional buffering valve is connected between oil duct c and the oil duct d.
Hydraulic steering system is provided with the crab row mode and turns to two kinds of patterns of pattern.When described solenoid operated directional valve was in off-position, oil duct was connected with A1, the B1 mouth of control valve, and fluid enters two and turns to oil cylinder, realized turning to pattern; When described solenoid operated directional valve was in "on" position, oil duct was connected with A2, the B2 mouth of control valve, and fluid enters two crab row oil cylinders, after crab row cylinder action is finished, disconnect solenoid operated directional valve, the reverse operating steering wheel, fluid enters and turns to oil cylinder, realizes the crab row mode.
Operating principle: in this system; provide oil sources by gear pump; select turning to and the crab row mode of dual-steel wheel road roller by the charged situation of control solenoid operated directional valve earlier; the operation steering wheel drives control valve under selected pattern; control fluid arrives a wherein group oil cylinder, realizes selected pattern, runs into obstruction and impacted when two group oil cylinders turn to; the bidirectional buffering valve carries out the step-down unloading timely, plays the effect of protection oil cylinder.
The beneficial effects of the utility model are: can not only realize turning to and two kinds of patterns of crab row, and easy and simple to handle, improve the operating efficiency of road roller.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Among the figure: 1, fuel tank, 2, gear pump, 3, control valve, 4, solenoid operated directional valve, 51, the first bidirectional buffering valve, 52, the second bidirectional buffering valve, 61, first turns to oil cylinder, and 62, second turns to oil cylinder, 71, first crab row oil cylinder, 72, second crab row oil cylinder, 8, main overflow valve.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 1, the dual-steel wheel road roller hydraulic steering system comprise gear pump 2, control valve 3, solenoid operated directional valve 4, the first bidirectional buffering valve 51, the second bidirectional buffering valve 52, be connected with the A1 mouth of control valve 3 first turn to oil cylinder 61, be connected with the B1 mouth of control valve 3 second turn to oil cylinder 62, first crab row oil cylinder 71 that is connected with the A2 mouth of control valve 3 and the capable oil cylinder 72 of second crab that is connected with the B2 mouth of control valve 3; The S mouth of gear pump 2 is connected with fuel tank 1, the P mouth of gear pump 2 is connected with the P1 mouth of control valve 3, the T1 mouth of control valve 3 is connected with fuel tank 1, the L mouth of control valve 3 is connected with the P2 mouth of solenoid operated directional valve 4, the R mouth of control valve 3 is connected with the T2 mouth of solenoid operated directional valve 4, and solenoid operated directional valve 4 is charged to be the crab row mode, not charged for turning to pattern, be connected the first bidirectional buffering valve 51 between oil duct a and the oil duct b, be connected the second bidirectional buffering valve 52 between oil duct c and the oil duct d.
Described hydraulic steering system is provided with the crab row mode and turns to two kinds of patterns of pattern.When described solenoid operated directional valve 4 was in off-position, oil duct was connected with A1, the B1 mouth of control valve 3, and fluid enters two and turns to oil cylinder, realized turning to pattern.When described solenoid operated directional valve 4 was in "on" position, oil duct was connected with A2, the B2 mouth of control valve 3, and fluid enters two crab row oil cylinders, after crab row cylinder action is finished, disconnect solenoid operated directional valve 4, the reverse operating steering wheel, fluid enters and turns to oil cylinder, realizes the crab row mode.
The course of work is as follows: gear pump 2 uses for whole loop from hydraulic oil container 1 oil suction, when dual-steel wheel road roller does not need to realize any pattern, and inoperation steering wheel, the control valve 3 direct oil sump tanks 1 that fluid drives by steering wheel.Wherein, solenoid operated directional valve 4 is not charged for turning to pattern, and charged is the crab row mode.When needs are realized turning to pattern, keep solenoid operated directional valve 4 not charged, the control valve 3 that the direction of operating dribbling is moving, fluid enters and turns to oil cylinder, thereby realizes turning to of road roller, and speed that turns to and angular dimension depend on the speed and the number of turns of direction of operating dish.When needs are realized the crab row mode, give solenoid operated directional valve 4 charged, direction of operating dribbling brake control valve 3, fluid enters crab row oil cylinder, after crab row cylinder action is finished, makes solenoid operated directional valve 4 not charged, direction of operating dish round about again, thus realize the crab row of road roller.
Main overflow valve 8 is used to limit whole steering pressure, and when running into obstruction being subjected to impacting when two group oil cylinders turn to, the first bidirectional buffering valve 51 and the second bidirectional buffering valve 52 carry out the step-down unloading timely, play the effect of protection oil cylinder.
Claims (5)
1. dual-steel wheel road roller hydraulic steering system, the capable oil cylinder (72) of second crab that it is characterized in that hydraulic steering system comprises gear pump (2), control valve (3), solenoid operated directional valve (4), the first bidirectional buffering valve (51), the second bidirectional buffering valve (52), first crab row oil cylinder (71) that second turns to oil cylinder (62), is connected with the A2 mouth of control valve (3) that first turns to oil cylinder (61), is connected with the B1 mouth of control valve (3) that is connected with the A1 mouth of control valve (3) is connected with B2 mouth with control valve (3); Gear pump (2) be installed in fuel tank to the pipeline of control valve (3) to whole loop fuel feeding; The T1 mouth of control valve (3) is connected with fuel tank (1), the L mouth of control valve (3) is connected with the P2 mouth of solenoid operated directional valve (4), the R mouth of control valve (3) is connected with the T2 mouth of solenoid operated directional valve (4), the first bidirectional buffering valve (51) is connected between oil duct a and the oil duct b, and the second bidirectional buffering valve (52) is connected between oil duct c and the oil duct d.
2. dual-steel wheel road roller hydraulic steering system according to claim 1 is characterized in that the S mouth of described gear pump (2) is connected with fuel tank (1), and the P mouth of gear pump (2) is connected with the P1 mouth of control valve (3).
3. dual-steel wheel road roller hydraulic steering system according to claim 1 is characterized in that described hydraulic steering system is provided with the crab row mode and turns to two kinds of patterns of pattern.
4. dual-steel wheel road roller hydraulic steering system according to claim 3 is characterized in that oil duct is connected with A1, the B1 mouth of control valve (3) when described solenoid operated directional valve (4) when being in off-position, and fluid enters two and turns to oil cylinder, realizes turning to pattern.
5. dual-steel wheel road roller hydraulic steering system according to claim 1, it is characterized in that when described solenoid operated directional valve (4) when being in "on" position, oil duct is connected with A2, the B2 mouth of control valve (3), fluid enters two crab row oil cylinders, after crab row cylinder action is finished, disconnect solenoid operated directional valve (4), the reverse operating steering wheel, fluid enters and turns to oil cylinder, realizes the crab row mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205964195U CN201850487U (en) | 2010-11-05 | 2010-11-05 | Hydraulic steering system of double-steel-wheel road roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205964195U CN201850487U (en) | 2010-11-05 | 2010-11-05 | Hydraulic steering system of double-steel-wheel road roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201850487U true CN201850487U (en) | 2011-06-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205964195U Expired - Lifetime CN201850487U (en) | 2010-11-05 | 2010-11-05 | Hydraulic steering system of double-steel-wheel road roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201850487U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839589A (en) * | 2012-09-12 | 2012-12-26 | 王全章 | Directional vibration road roller |
| CN103452936A (en) * | 2013-09-10 | 2013-12-18 | 徐工集团工程机械股份有限公司道路机械分公司 | Lockable hydraulic crab steering system for double-drum rollers |
| CN103452936B (en) * | 2013-09-10 | 2016-11-30 | 徐工集团工程机械股份有限公司道路机械分公司 | A kind of hydraulic pressure Eriocheir sinensis row steering of dual-steel wheel road roller locking function |
| CN106481605A (en) * | 2016-12-13 | 2017-03-08 | 三汽车制造有限公司 | A kind of road roller hydraulic system and road roller |
| CN107304542A (en) * | 2016-04-20 | 2017-10-31 | 卡特彼勒路面机械公司 | Vibratile compacter |
| CN107879290A (en) * | 2017-12-20 | 2018-04-06 | 合肥搬易通科技发展有限公司 | The enlarger that a kind of multidirectional forklift front wheel turns to |
-
2010
- 2010-11-05 CN CN2010205964195U patent/CN201850487U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839589A (en) * | 2012-09-12 | 2012-12-26 | 王全章 | Directional vibration road roller |
| CN102839589B (en) * | 2012-09-12 | 2014-12-03 | 王全章 | Directional vibration road roller |
| CN103452936A (en) * | 2013-09-10 | 2013-12-18 | 徐工集团工程机械股份有限公司道路机械分公司 | Lockable hydraulic crab steering system for double-drum rollers |
| CN103452936B (en) * | 2013-09-10 | 2016-11-30 | 徐工集团工程机械股份有限公司道路机械分公司 | A kind of hydraulic pressure Eriocheir sinensis row steering of dual-steel wheel road roller locking function |
| CN107304542A (en) * | 2016-04-20 | 2017-10-31 | 卡特彼勒路面机械公司 | Vibratile compacter |
| CN107304542B (en) * | 2016-04-20 | 2021-07-27 | 卡特彼勒路面机械公司 | Vibrating compactor |
| CN106481605A (en) * | 2016-12-13 | 2017-03-08 | 三汽车制造有限公司 | A kind of road roller hydraulic system and road roller |
| CN107879290A (en) * | 2017-12-20 | 2018-04-06 | 合肥搬易通科技发展有限公司 | The enlarger that a kind of multidirectional forklift front wheel turns to |
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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: 20110601 |