CN210149414U - Full hydraulic steering system of street sweeper dynamic load sensing - Google Patents
Full hydraulic steering system of street sweeper dynamic load sensing Download PDFInfo
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- CN210149414U CN210149414U CN201920937452.0U CN201920937452U CN210149414U CN 210149414 U CN210149414 U CN 210149414U CN 201920937452 U CN201920937452 U CN 201920937452U CN 210149414 U CN210149414 U CN 210149414U
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Abstract
The utility model discloses a full-hydraulic steering system of street sweeper dynamic load sensing, including oil tank, oil pump, pressure compensation priority valve, pressure compensation full-hydraulic steering gear, steering wheel and steering cylinder; the steering oil cylinder is arranged between the front frame and the rear frame which are hinged with each other and can drive the front frame and the rear frame to rotate mutually to perform steering action; the pressure compensation priority valve is provided with a P1 port, a CF port, an EF port, an LS1 port and a T1 port, and the pressure compensation full hydraulic steering gear is provided with a P2 port, an L port, an R port, an LS2 port and a T2 port. The steering mechanism has the advantages of flexible steering performance, small-size installation, capability of reducing power loss, strong adaptability to cold weather, light operation, safety and reliability.
Description
Technical Field
The utility model relates to a street sweeper technical field, concretely relates to street sweeper hydraulic steering system.
Background
The sweeper is an integrated garbage sweeper combining sweeping and dust collection, has the advantages of high working efficiency, low cleaning cost, good cleaning effect, high safety performance, high economic return rate and the like, and is widely applied to the sweeping work of roads in various large, medium and small cities.
At present, a small diesel sweeper has no perfect hydraulic steering system. The existing sweeping vehicle generally refers to a relatively mature hydraulic steering system scheme of a tractor, a forklift, a loader and the like. But the general existence volume is on the large side, and the system is spacious, turns to the flexibility poor, and cold weather work has abnormal sound, power loss scheduling problem greatly.
Therefore, how to improve the existing hydraulic steering system of the sweeper to overcome the above problems is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pair of have a nimble performance that turns to, realize little volume installation, can reduce power loss, to cold weather's strong adaptability, easy operation, and safe and reliable's the full hydraulic steering system of street sweeper dynamic load sensing.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a full hydraulic steering system of street sweeper dynamic load sensing which characterized in that: the hydraulic steering system comprises an oil tank, an oil pump, a pressure compensation priority valve, a pressure compensation full hydraulic steering gear, a steering wheel and a steering oil cylinder; the steering oil cylinder is arranged between the front frame and the rear frame which are hinged with each other and can drive the front frame and the rear frame to rotate mutually to perform steering action;
the pressure compensation priority valve is provided with a P1 port, a CF port, an EF port, an LS1 port and a T1 port, and the pressure compensation full hydraulic steering gear is provided with a P2 port, an L port, an R port, an LS2 port and a T2 port;
an oil suction pipeline is arranged between the P1 port and the oil pump, the oil pump is connected in series with the oil suction pipeline, a steering pipeline is arranged between the CF port and the P2 port, the EF port is connected with a working oil way, a standby oil way is arranged between the LS1 port and the LS2 port, the T1 port is connected with an oil drainage pipeline, the oil drainage pipeline is connected with the oil tank, the L port and the R port are connected with an output pipeline, the output pipeline is connected with a steering oil cylinder, the T2 port is connected with an oil return pipeline, and the oil return pipeline is connected with the oil tank; it should be noted that, the hydraulic system of this scheme is not the totally closed structure, therefore has a small amount of hydraulic oil leakage, and the hydraulic oil that leaks this moment just can return to the oil tank through T1 mouth and draining pipeline.
When the steering wheel acts, hydraulic oil is preferentially supplied through the pressure compensation priority valve to ensure the supply of the CF port, and the hydraulic oil flows out of the CF port, enters the P2 port through the steering pipeline, then flows through the pressure compensation full hydraulic steering gear, flows out of the L port and the R port, and enters the steering oil cylinder through the output pipeline to realize steering;
when the steering wheel does not act, one part of hydraulic oil flows out of the EF port through the pressure compensation priority valve and flows to a working part through the working pipeline, and the other part of hydraulic oil flows out of the LS1 port through the pressure compensation priority valve and enters the LS2 port through the standby oil way, then flows through the pressure compensation full-hydraulic steering gear, flows out of the T2 port and enters the oil tank through the oil return pipeline; and the hydraulic oil quantity discharged from the EF port is larger than that discharged from the LS1 port.
Preferably, when the steering wheel is not operated, the hydraulic oil amount discharged through the EF port accounts for 90% to 99% of the total outflow hydraulic oil amount, and the hydraulic oil amount discharged through the LS1 port accounts for 1% to 10% of the total outflow hydraulic oil amount.
Further, when the steering wheel is not operated, the hydraulic oil mass through the EF port accounts for 95% of the total outflow hydraulic oil mass, and the hydraulic oil mass through the LS1 port accounts for 5% of the total outflow hydraulic oil mass.
As an improvement, an oil supplementing pipeline is further connected in parallel between the output pipelines, two oil supplementing one-way valves are arranged on the oil supplementing pipeline, and the oil supplementing one-way valves only allow hydraulic oil to enter the output pipelines from the oil supplementing pipeline; the oil supplementing pipeline is further provided with three safety valves, and the three safety valves are respectively arranged at two ends of the oil supplementing one-way valve and between the two oil supplementing one-way valves. Due to different road surface conditions, uneven road surfaces such as concave road teeth, raised stones and the like can be encountered in the traveling process of the sweeper, and the oil pressures required by the two steering cylinders are different when the sweeper turns; therefore, an oil supplementing pipeline is added, so that two output pipelines connected with the steering oil cylinder can obtain proper oil pressure, and smooth steering is ensured. It is worth mentioning that the oil supplementing pipeline is communicated with the oil return pipeline so that redundant hydraulic oil can flow back into the oil tank.
Preferably, an oil suction filter is arranged on the oil suction pipeline, an oil return filter is arranged on the oil return pipeline, and an oil drainage filter is arranged on the oil drainage pipeline. The filter makes the hydraulic oil that gets into hydraulic system purer.
As an improvement, still include gear motor and encoder, gear motor can drive the steering wheel rotates, the encoder sets up preceding frame with the articulated department of back frame, and electric connection gear motor, the encoder feedback preceding frame with turned angle extremely between the back frame gear motor. The sweeper has the function of remote control steering.
Compared with the prior art, the utility model has the advantages of:
1. the pressure compensation priority valve can preferentially distribute flow according to the requirement of a steering pipeline, and the sufficient oil supply can be ensured no matter how the load pressure and the rotating speed of the steering wheel change, so that the steering is stable and reliable.
2. The hydraulic oil output from the oil pump is distributed to the steering line at a flow rate necessary for maintaining the steering line in a normal operation, and the remaining hydraulic oil is supplied to other hydraulic oil passages for use. Therefore, the power loss caused by excessive oil supply to the steering oil way is eliminated, the system efficiency is improved, the oil way is simplified, the installation space is reduced, and the energy consumption of the sweeper is reduced.
3. According to the scheme, the pressure compensation priority valve and the pressure compensation full-hydraulic steering gear are connected with each other through the LS1 port, the LS2 port and the standby oil way; when the steering wheel does not rotate, most of hydraulic oil (about 95%) can enter other working components (other working components comprise a sweeping motor, a sweeping lifting oil cylinder and a sweeping mechanism amplitude-variable oil cylinder) from an EF port and a working pipeline to realize other hydraulic actions, and a small part of hydraulic oil enters the pressure compensation full-hydraulic steering gear from an LS1 port, an LS2 port and a standby oil way to ensure that the pressure compensation full-hydraulic steering gear is filled with the hydraulic oil all the time, so that when the steering wheel rotates, the pressure compensation full-hydraulic steering gear can quickly respond to the steering wheel to realize flexible steering.
Drawings
Fig. 1 is a schematic diagram of the operation of a preferred embodiment according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.
As shown in fig. 1, a preferred embodiment of the present invention includes an oil tank 1, an oil pump 2, a pressure compensation priority valve 3, a pressure compensation full hydraulic steering gear 4, a steering wheel 5, a steering cylinder 6, a reduction motor 7 and an encoder 8; the steering oil cylinder 6 is arranged between the front frame 100 and the rear frame 200 which are hinged mutually, and can drive the front frame 100 and the rear frame 200 to rotate mutually to perform steering action; the encoder 8 is arranged at the hinged position of the front frame 100 and the rear frame 200 and is electrically connected with the speed reducing motor 7, and the encoder 8 feeds back a rotating angle between the front frame 100 and the rear frame 200 to the speed reducing motor for electrically controlling and steering the sweeper.
In this embodiment, the hydraulic control system is as follows: the pressure compensation priority valve 3 is provided with a P1 port, a CF port, an EF port, an LS1 port and a T1 port, and the pressure compensation full hydraulic steering gear 4 is provided with a P2 port, an L port, an R port, an LS2 port and a T2 port. An oil suction pipeline 9 is arranged between the port P1 and the oil pump 2, the oil pump 2 is connected in series to the oil suction pipeline 9, a steering pipeline 10 is arranged between the port CF and the port P2, the port EF is connected with a working oil way 11, a standby oil way 12 is arranged between the port LS1 and the port LS2, the port T1 is connected with an oil drainage pipeline 13, the oil drainage pipeline 13 is connected with the oil tank 1, the port L and the port R are connected with an output pipeline 14, the output pipeline 14 is connected with the steering oil cylinder 6, the port T2 is connected with an oil return pipeline 15, and the oil return pipeline 15 is connected with the oil.
The specific working mode is as follows: when the steering wheel 5 acts, hydraulic oil is preferentially supplied from a CF port through the pressure compensation priority valve 3, flows out from the CF port, enters a P2 port through the steering pipeline 10, then flows out from an L port and an R port through the pressure compensation full hydraulic steering gear 4, and enters the steering oil cylinder 6 through the output pipeline 14 to realize steering. When the steering wheel 5 does not act, one part of hydraulic oil flows out from an EF port through the pressure compensation priority valve 3 and flows to a working part through a working pipeline 11, and the other part of hydraulic oil flows out from an LS1 port through the pressure compensation priority valve 3 and enters an LS2 port through a standby oil way 12, then flows through the pressure compensation full-hydraulic steering gear 4, flows out from a T2 port and enters an oil tank through an oil return pipeline 15; and the hydraulic oil mass through EF export is greater than the hydraulic oil mass through LS1 export, specifically, when steering wheel 5 is not moved, the hydraulic oil mass through EF export accounts for 95% of the total outflow hydraulic oil mass, and the hydraulic oil mass through LS1 accounts for 5% of the total outflow hydraulic oil mass.
In addition, in order to make the steering more stable and reliable, an oil supplementing pipeline 16 is connected in parallel between the output pipelines 14, two oil supplementing one-way valves 161 are arranged on the oil supplementing pipeline, and the oil supplementing one-way valves 161 only allow hydraulic oil to enter the output pipelines 14 from the oil supplementing pipeline 16; the oil supplementing pipeline 16 is further provided with three safety valves 162, and the three safety valves 162 are respectively arranged at two ends of the oil supplementing one-way valve 161 and between the two oil supplementing one-way valves 161.
As a conventional arrangement, an oil suction filter 91 is arranged on the oil suction pipeline 9, an oil return filter 151 is arranged on the oil return pipeline 15, and an oil drain filter 131 is arranged on the oil drain pipeline 13.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A full hydraulic steering system of street sweeper dynamic load sensing which characterized in that: the hydraulic steering system comprises an oil tank, an oil pump, a pressure compensation priority valve, a pressure compensation full hydraulic steering gear, a steering wheel and a steering oil cylinder; the steering oil cylinder is arranged between the front frame and the rear frame which are hinged with each other and can drive the front frame and the rear frame to rotate mutually to perform steering action;
the pressure compensation priority valve is provided with a P1 port, a CF port, an EF port, an LS1 port and a T1 port, and the pressure compensation full hydraulic steering gear is provided with a P2 port, an L port, an R port, an LS2 port and a T2 port;
an oil suction pipeline is arranged between the P1 port and the oil pump, the oil pump is connected in series with the oil suction pipeline, a steering pipeline is arranged between the CF port and the P2 port, the EF port is connected with a working oil way, a standby oil way is arranged between the LS1 port and the LS2 port, the T1 port is connected with an oil drainage pipeline, the oil drainage pipeline is connected with the oil tank, the L port and the R port are connected with an output pipeline, the output pipeline is connected with a steering oil cylinder, the T2 port is connected with an oil return pipeline, and the oil return pipeline is connected with the oil tank;
when the steering wheel acts, hydraulic oil is preferentially supplied through the pressure compensation priority valve to ensure the supply of the CF port, and the hydraulic oil flows out of the CF port, enters the P2 port through the steering pipeline, then flows through the pressure compensation full hydraulic steering gear, flows out of the L port and the R port, and enters the steering oil cylinder through the output pipeline to realize steering;
when the steering wheel does not act, one part of hydraulic oil flows out of the EF port through the pressure compensation priority valve and flows to a working part through the working pipeline, and the other part of hydraulic oil flows out of the LS1 port through the pressure compensation priority valve and enters the LS2 port through the standby oil way, then flows through the pressure compensation full-hydraulic steering gear, flows out of the T2 port and enters the oil tank through the oil return pipeline; and the hydraulic oil quantity discharged from the EF port is larger than that discharged from the LS1 port.
2. The full hydraulic steering system for the dynamic load sensing of the sweeper according to claim 1, wherein: when the steering wheel does not act, the hydraulic oil mass discharged from the EF port accounts for 90-99% of the total outflow hydraulic oil mass, and the hydraulic oil mass discharged from the LS1 port accounts for 1-10% of the total outflow hydraulic oil mass.
3. The full hydraulic steering system for the dynamic load sensing of the sweeper according to claim 2, wherein: when the steering wheel is not operated, the hydraulic oil mass through EF mouth accounts for 95% of the total outflow hydraulic oil mass, and the hydraulic oil mass through LS1 mouth accounts for 5% of the total outflow hydraulic oil mass.
4. The full hydraulic steering system for the dynamic load sensing of the sweeper according to claim 1, wherein: an oil supplementing pipeline is also connected in parallel between the output pipelines, two oil supplementing one-way valves are arranged on the oil supplementing pipeline, and the oil supplementing one-way valves only allow hydraulic oil to enter the output pipelines from the oil supplementing pipeline; the oil supplementing pipeline is further provided with three safety valves, and the three safety valves are respectively arranged at two ends of the oil supplementing one-way valve and between the two oil supplementing one-way valves.
5. The full hydraulic steering system for the dynamic load sensing of the sweeper according to claim 1, wherein: an oil suction filter is arranged on the oil suction pipeline, an oil return filter is arranged on the oil return pipeline, and an oil drainage filter is arranged on the oil drainage pipeline.
6. The full hydraulic steering system for the dynamic load sensing of the sweeper according to any one of claims 1 to 5, wherein: still include gear motor and encoder, gear motor can drive the steering wheel rotates, the encoder sets up preceding frame with the articulated department of back frame, and electric connection gear motor, the encoder feedback preceding frame with turned angle extremely between the back frame gear motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937452.0U CN210149414U (en) | 2019-06-20 | 2019-06-20 | Full hydraulic steering system of street sweeper dynamic load sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937452.0U CN210149414U (en) | 2019-06-20 | 2019-06-20 | Full hydraulic steering system of street sweeper dynamic load sensing |
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| Publication Number | Publication Date |
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| CN210149414U true CN210149414U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920937452.0U Active CN210149414U (en) | 2019-06-20 | 2019-06-20 | Full hydraulic steering system of street sweeper dynamic load sensing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110254509A (en) * | 2019-06-20 | 2019-09-20 | 宁波易捷环卫设备有限公司 | A kind of road sweeper dynamic load sensing all hydraulic pressure steering-gear |
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2019
- 2019-06-20 CN CN201920937452.0U patent/CN210149414U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110254509A (en) * | 2019-06-20 | 2019-09-20 | 宁波易捷环卫设备有限公司 | A kind of road sweeper dynamic load sensing all hydraulic pressure steering-gear |
| CN110254509B (en) * | 2019-06-20 | 2024-05-28 | 宁波易捷环卫设备有限公司 | Dynamic load sensing full-hydraulic steering system of sweeper |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Ruiling electromechanical Co.,Ltd. Assignor: NINGBO YIJIE ENVIRONMENTAL SANITATION EQUIPMENT CO.,LTD. Contract record no.: X2022330000282 Denomination of utility model: A dynamic load sensing full hydraulic steering system for sweeper Granted publication date: 20200317 License type: Common License Record date: 20220707 |