CN204210551U - Steering swivel system and there is the construction machinery and equipment of this steering swivel system - Google Patents
Steering swivel system and there is the construction machinery and equipment of this steering swivel system Download PDFInfo
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- CN204210551U CN204210551U CN201420640437.7U CN201420640437U CN204210551U CN 204210551 U CN204210551 U CN 204210551U CN 201420640437 U CN201420640437 U CN 201420640437U CN 204210551 U CN204210551 U CN 204210551U
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- Prior art keywords
- oil
- motor
- check valve
- steering swivel
- swivel system
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Abstract
The utility model relates to steering swivel system and has the construction machinery and equipment of this steering swivel system, the oil inlet of the oil pump of this steering swivel system is connected to fuel tank, the oil outlet of oil pump is connected to the oil inlet of deflector, oil circuit between the oil outlet and the oil inlet of deflector of oil pump is connected to the first check valve, the oil outlet of motor is connected to the oil inlet of deflector, oil circuit between the oil outlet and the oil inlet of deflector of motor is connected to the second check valve, the oil outlet of deflector is connected to fuel tank by oil return circuit, oil return circuit is connected to this back pressure check valve, the oil suction of motor is connected on oil return circuit, and back pressure check valve is between the oil suction and fuel tank of motor, the oil outlet of motor is optionally communicated with oil suction or disconnects by pilot operated directional control valve.Steering swivel system adopts motor to provide stable pressure oil for steering swivel system, thus overcomes the shortcomings such as radial plunger pump suction capacity is poor.
Description
Technical field
The utility model relates to steering swivel system technical field, particularly a kind of steering swivel system and have the construction machinery and equipment of this steering swivel system.
Background technology
At present, the steering swivel system that the steering swivel system of large-tonnage construction machinery and equipment is mostly equipped with two covers to work alone, i.e. main steering swivel system and emergent steering swivel system, emergent steering swivel system can prevent the construction machinery and equipment when main steering swivel system lost efficacy from can not turn to and have an accident.
Chinese patent CN201210176375.4 discloses a kind of emergency double loop steering boost system, include main steering swivel system and emergent steering swivel system, its version is as shown in Figure 1: the jury pump 31 in this emergency double loop steering boost system is radial plunger pump, because radial plunger pump is subject to its row's quantitative limitation, the stroke of its radial plunger is very short, and suction capacity is poor and load-carrying capacity is lower in actual applications to make radial plunger pump.In addition, the structure for the guard valve 32 switching main steering swivel system and emergent steering swivel system work in this emergency double loop steering boost system is comparatively complicated, and its cost is also higher.
Therefore, how improving for above-mentioned deficiency, more to adapt to use needs, is those skilled in the art's technical matterss urgently to be resolved hurrily.
Utility model content
In view of this, one of the purpose of this utility model is to provide a kind of steering swivel system.
Specifically, this steering swivel system comprises oil pump, motor, back pressure check valve, pilot operated directional control valve, second check valve and deflector, the oil inlet of described oil pump is connected to fuel tank, the oil outlet of described oil pump is connected to the oil inlet of described deflector, the oil outlet of described motor is connected to the oil inlet of described deflector, oil circuit between the oil outlet and the oil inlet of described deflector of described motor is connected to described second check valve, the oil outlet of described deflector is connected to described fuel tank by oil return circuit, described oil return circuit is connected to described back pressure check valve, the oil suction of described motor is connected on described oil return circuit, and described back pressure check valve is between the oil suction and described fuel tank of described motor, the oil outlet of described motor is optionally communicated with oil suction or disconnects by described pilot operated directional control valve.
Further, the first actuator port of described pilot operated directional control valve is connected on the oil circuit between described motor and described second check valve, and the second actuator port of described pilot operated directional control valve is connected on the oil suction of described motor.
Further, also comprise governor valve, the oil inlet of described governor valve is connected on the oil circuit between the oil outlet of described motor and described second check valve, and the oil outlet of described governor valve is connected on described oil return circuit, and the control end of described pilot operated directional control valve is connected with described oil pump.
Further, also comprise repairing check valve, the oil inlet of described repairing check valve is connected on described oil return circuit, and the oil outlet of described repairing check valve is connected on the oil circuit between the oil outlet of described motor and described second check valve.
Further, also include the first by pass valve and the first check valve, oil circuit between the oil outlet of described oil pump and the oil inlet of described deflector is connected to described first check valve, the oil inlet of described first by pass valve is connected on the oil circuit between the oil outlet of described oil pump and described first check valve, and the oil outlet of described first by pass valve is connected on described oil return circuit.
Further, also include the second by pass valve, the oil inlet of described second by pass valve is connected on the oil circuit between the oil outlet of described motor and described second check valve, and the oil outlet of described second by pass valve is connected to described oil return circuit.
Steering swivel system of the present utility model adopts motor to provide stable pressure oil for steering swivel system, and oil absorption and the load-carrying capacity of motor is improved by back pressure check valve, make this steering swivel system just can realize turning to work to the emergent of construction machinery and equipment by motor, thus overcome the shortcoming that in prior art, radial plunger pump suction capacity is poor and load-carrying capacity is lower.In addition, in this steering swivel system, substitute guard valve in background technology and be provided in the pilot operated directional control valve that two kinds of mode of operations switch to turning to there is simple, the lower-cost advantage of structure.
Another object of the present utility model is to provide a kind of construction machinery and equipment.
Further, described construction machinery and equipment is hoisting crane.
This project machinery is provided with any one steering swivel system above-mentioned.Because above-mentioned steering swivel system has above-mentioned technique effect, therefore, this project machinery also has corresponding technique effect.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of existing a kind of emergency double loop steering boost system;
The hydraulic principle schematic diagram of the steering swivel system that Fig. 2 provides for the utility model embodiment.
Detailed description of the invention
To it should be pointed out that in this part to the description of concrete structure and description order it is only explanation to specific embodiment, should not be considered as there is any restriction to protection domain of the present utility model.In addition, when not conflicting, the embodiment in this part and the feature in embodiment can combine mutually.
The utility model embodiment provides a kind of steering swivel system, and it is applied in construction machinery and equipment, to control turning to of construction machinery and equipment when the main steering swivel system of construction machinery and equipment breaks down, avoids construction machinery and equipment generation traffic or construction accident.
Please refer to Fig. 2, the steering cylinder 9 that this steering swivel system comprises oil pump 1, first check valve 2, motor 3, back pressure check valve 4, pilot operated directional control valve 5, second check valve 7, deflector 8 and is connected with this deflector 8.
This oil pump 1 is arranged at the power taking mouth of engineering machinery engine, and it is followed driving engine and works together.The oil inlet of this oil pump 1 is connected to fuel tank 10, and oil outlet is connected to the oil inlet P of this deflector 8, and the oil circuit between the oil outlet and the oil inlet P of this deflector 8 of this oil pump 1 is connected to this first check valve 2.This motor 3 is arranged at the power taking mouth in construction machinery and equipment auxiliary gear box or vehicle bridge, as long as the tire of construction machinery and equipment is in rotation, this motor 3 just can normal operation.The oil outlet of this motor 3 is connected to the oil inlet P of this deflector 8, and the oil circuit between the oil outlet and the oil inlet P of this deflector 8 of this motor 3 is connected to this second check valve 7.The oil outlet T of this deflector 8 is connected to this fuel tank 10 by oil return circuit.This oil return circuit is connected to this back pressure check valve 4, and this back pressure check valve 4 can guarantee the back pressure that the intake side of this motor 3 keeps certain.The oil suction of this motor 3 is connected on this oil return circuit, and this back pressure check valve 4 is between the oil suction and this fuel tank 10 of this motor 3.First actuator port of this pilot operated directional control valve 5 is connected on the oil circuit between this motor 3 and this second check valve 7, second actuator port of this pilot operated directional control valve 5 is connected on the oil suction of this motor 3, and the oil outlet of this motor 3 is optionally communicated with oil suction or disconnects by this pilot operated directional control valve 5.This pilot operated directional control valve 5 is the common component in Hydraulic Field, and it has simple, the lower-cost advantage of structure compared to the guard valve in background technology.In addition, it should be noted that this motor 3 is preferably piston motor, also can be the motor of bidirectional geared motor or other form.
When this project machinery normally travels, driving engine normal rotation, oil pump 1 normally works, the oil outlet pressure oil output of this oil pump 1 enters the oil inlet P of this deflector 8 through this first check valve 2, entered to control the flexible of this steering cylinder 9 in this steering cylinder 9 by this deflector 8 control presssure oil, and then the turning to of dominant project machinery.The oil return of this steering cylinder 9 in this deflector 8, and is back to this fuel tank 10 from the oil outlet T of this deflector 8 by this oil return circuit.Simultaneously, the pressure oil of the oil outlet output of this oil pump 1 can control this pilot operated directional control valve 5 as control oil and be in conducting position (namely the control end of this pilot operated directional control valve 5 is connected with this oil pump 1), the oil outlet of this motor 3 is connected with the oil suction of this motor 3 by this pilot operated directional control valve 5, therefore, the oil outlet of this motor 3 and oil suction form closed loop, namely pressure oil flows out from the oil outlet of this motor 3, flows into from the oil suction of this motor 3.Therefore this motor 3 cannot control this deflector 8.
When this oil pump 1 et out of order cannot work, the control oil acted on this pilot operated directional control valve 5 disappears, and this pilot operated directional control valve 5 is reset to the state of closedown, therefore, and this deflector uncontrollable of this oil pump 1.Because this pilot operated directional control valve 5 is in closed condition, therefore, the pressure oil exported by the oil outlet of this motor 3 enters the oil inlet P of this deflector 8 by this second check valve 7, entered to control the flexible of this steering cylinder 9 in this steering cylinder 9 by this deflector 8 control presssure oil, and then the turning to of dominant project machinery.The oil return of this steering cylinder 9 in this deflector 8, and is back to the oil suction of this motor 3 from the oil outlet T of this deflector 8 by this oil return circuit.Owing to being provided with this back pressure check valve 4 in oil return circuit, therefore, be positioned at this motor 3 intake side at this oil return circuit and can produce certain back pressure, can guarantee that this motor 3 can oil suction fully, thus overcome the shortcoming that in prior art, radial plunger pump suction capacity is poor and load-carrying capacity is lower.
When this project mechanical high-speed travels (oil pump 1 et out of order cannot work), because the rotation of the power taking mouth on auxiliary gear box or vehicle bridge also can be very high, the rotating speed of this motor 3 improves, and the oil mass of its pressure oil exported must increase.Now, this deflector 8 is easily caused to damage because oil pressure is excessive.In order to prevent the generation of above-mentioned situation, preferably, this steering swivel system also comprises governor valve 11, and its oil inlet is connected on the oil circuit between the oil outlet of this motor 3 and this second check valve 7, and its oil outlet is connected on oil return circuit.This governor valve 11 is in normally closed mode of operation, when the pressure oil oil mass that motor 3 exports acquires a certain degree, this governor valve 11 can be controlled by oil circuit control and be in conducting state, the oil outlet of this motor 3 is connected with the oil suction of this motor 3, thus the partial pressure that this deflector 8 is exported oil is back to the intake side of this motor 3.Can effectively lower the damage causing this deflector 8 because oil pressure is excessive like this.This governor valve 11 has flow regulating effect, and it can be flow divider valve etc.
When construction machinery and equipment low speed driving, because motor 3 inherently has the good feature of low speed response (can be low to moderate 50 revolutions per seconds), therefore, equally can the flow of effective stable output, ensure the normal work of deflector.
When construction machinery and equipment needs reversing, this motor 3 is driven reversion.Now, also can turn to when moveing backward to make construction machinery and equipment, preferably, this steering swivel system also comprises repairing check valve 12, the oil inlet of this repairing check valve 12 is connected on oil return circuit, and the oil outlet of this repairing check valve 12 is connected on the oil circuit between the oil outlet of this motor 3 and this second check valve 7.When this motor 3 reverses; this oil suction (now as the oil outlet) pressure oil output of motor 3 is also through this repairing check valve 12; and carry out oil suction by the oil outlet (now as oil suction) of this motor 3, thus protect this motor 3 can not cause because inhaling sky damaging.
In addition, under the state that this oil pump 1 normally works, in order to prevent this deflector 8 because of the pressure of pressure oil excessive and damage, the first by pass valve 13 is also included in this steering swivel system, the oil inlet of this first by pass valve 13 is connected on the oil circuit between the oil outlet of this oil pump 1 and this first check valve 2, and the oil outlet of this first by pass valve 13 is connected on this oil return circuit.
Similarly, under the state of this motor 3 work, in order to prevent this deflector 8 because of the pressure of pressure oil excessive and damage, the second by pass valve 14 is also included in this steering swivel system, the oil inlet of this second by pass valve 14 is connected on the oil circuit between the oil outlet of this motor 3 and this second check valve 7, and the oil outlet of this second by pass valve 14 is connected to this oil return circuit.
The steering swivel system that the utility model embodiment provides, it adopts motor to provide stable pressure oil for steering swivel system, and oil absorption and the load-carrying capacity of motor is improved by back pressure check valve, make this steering swivel system just can realize turning to work to the emergent of construction machinery and equipment by motor, thus overcome the shortcoming that in prior art, radial plunger pump suction capacity is poor and load-carrying capacity is lower.In addition, in this steering swivel system, substitute guard valve in background technology and be provided in the pilot operated directional control valve that two kinds of mode of operations switch to turning to there is simple, the lower-cost advantage of structure.
The utility model other embodiment still provides a kind of construction machinery and equipment, be specially hoisting crane, this project machinery is provided with above-mentioned steering swivel system, because above-mentioned steering swivel system has above-mentioned technique effect, therefore, the construction machinery and equipment being provided with this steering swivel system also should possess corresponding technique effect, and its specific implementation process is similar to the above embodiments, therefore does not repeat.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. a steering swivel system, it is characterized in that, comprise: oil pump (1), motor (3), back pressure check valve (4), pilot operated directional control valve (5), second check valve (7) and deflector (8), the oil inlet of described oil pump (1) is connected to fuel tank (10), the oil outlet of described oil pump (1) is connected to the oil inlet (P) of described deflector (8), the oil outlet of described motor (3) is connected to the oil inlet (P) of described deflector (8), oil circuit between the oil outlet and the oil inlet (P) of described deflector (8) of described motor (3) is connected to described second check valve (7), the oil outlet (T) of described deflector (8) is connected to described fuel tank (10) by oil return circuit, described oil return circuit is connected to described back pressure check valve (4), the oil suction of described motor (3) is connected on described oil return circuit, and described back pressure check valve (4) is positioned between the oil suction of described motor (3) and described fuel tank (10), the oil outlet of described motor (3) is optionally communicated with oil suction or disconnects by described pilot operated directional control valve (5).
2. steering swivel system as claimed in claim 1, it is characterized in that: the first actuator port of described pilot operated directional control valve (5) is connected on the oil circuit between described motor (3) and described second check valve (7), second actuator port of described pilot operated directional control valve (5) is connected on the oil suction of described motor (3), and the control end of described pilot operated directional control valve (5) is connected with described oil pump (1).
3. steering swivel system as claimed in claim 1, it is characterized in that: also comprise governor valve (11), the oil inlet of described governor valve (11) is connected on the oil circuit between the oil outlet of described motor (3) and described second check valve (7), and the oil outlet of described governor valve (11) is connected on described oil return circuit.
4. steering swivel system as claimed in claim 1, it is characterized in that: also comprise repairing check valve (12), the oil inlet of described repairing check valve (12) is connected on described oil return circuit, and the oil outlet of described repairing check valve (12) is connected on the oil circuit between the oil outlet of described motor (3) and described second check valve (7).
5. steering swivel system as claimed in claim 1, it is characterized in that: also include the first by pass valve (13) and the first check valve (2), oil circuit between the oil outlet of described oil pump (1) and the oil inlet (P) of described deflector (8) is connected to described first check valve (2), the oil inlet of described first by pass valve (13) is connected on the oil circuit between the oil outlet of described oil pump (1) and described first check valve (2), and the oil outlet of described first by pass valve (13) is connected on described oil return circuit.
6. steering swivel system as claimed in claim 1, it is characterized in that: also include the second by pass valve (14), the oil inlet of described second by pass valve (14) is connected on the oil circuit between the oil outlet of described motor (3) and described second check valve (7), and the oil outlet of described second by pass valve (14) is connected to described oil return circuit.
7. a construction machinery and equipment, is characterized in that: described construction machinery and equipment is provided with the steering swivel system described in any one of claim 1-6.
8. construction machinery and equipment as claimed in claim 7, is characterized in that: described construction machinery and equipment is hoisting crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420640437.7U CN204210551U (en) | 2014-10-30 | 2014-10-30 | Steering swivel system and there is the construction machinery and equipment of this steering swivel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420640437.7U CN204210551U (en) | 2014-10-30 | 2014-10-30 | Steering swivel system and there is the construction machinery and equipment of this steering swivel system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204210551U true CN204210551U (en) | 2015-03-18 |
Family
ID=52979249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420640437.7U Expired - Fee Related CN204210551U (en) | 2014-10-30 | 2014-10-30 | Steering swivel system and there is the construction machinery and equipment of this steering swivel system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204210551U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016493A (en) * | 2017-11-29 | 2018-05-11 | 山东蓬翔汽车有限公司 | A kind of steering of wide dumper |
| CN114382869A (en) * | 2022-01-24 | 2022-04-22 | 一汽解放汽车有限公司 | Gearbox assembly and vehicle |
-
2014
- 2014-10-30 CN CN201420640437.7U patent/CN204210551U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016493A (en) * | 2017-11-29 | 2018-05-11 | 山东蓬翔汽车有限公司 | A kind of steering of wide dumper |
| CN108016493B (en) * | 2017-11-29 | 2024-01-16 | 山东蓬翔汽车有限公司 | Steering system of wide dump truck |
| CN114382869A (en) * | 2022-01-24 | 2022-04-22 | 一汽解放汽车有限公司 | Gearbox assembly and vehicle |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20171030 |