CN217713121U - Locking hydraulic control system of battery replacement system and engineering machinery - Google Patents
Locking hydraulic control system of battery replacement system and engineering machinery Download PDFInfo
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- CN217713121U CN217713121U CN202220897052.3U CN202220897052U CN217713121U CN 217713121 U CN217713121 U CN 217713121U CN 202220897052 U CN202220897052 U CN 202220897052U CN 217713121 U CN217713121 U CN 217713121U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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Abstract
The utility model relates to an engineering machine tool technical field, concretely relates to lock hydraulic control system and engineering machine tool that trades electrical system. The locking hydraulic control system of the battery replacement system comprises: the hydraulic pump is communicated with the oil tank, the rod cavity of the hydraulic cylinder and the rodless cavity of the hydraulic cylinder, and the rod cavity of the hydraulic cylinder and the rodless cavity of the hydraulic cylinder are communicated with the oil tank; the lock-up hydraulic control system has a lock-up state for supplying oil to a rodless cavity of the hydraulic cylinder and an unlock state for supplying oil to a rod cavity of the hydraulic cylinder by the hydraulic pump. The utility model discloses a hydraulic control trades locking and unblock of electric system, and locking force is bigger, more is fit for the trade operating mode of engineering machine tool class such as excavator.
Description
Technical Field
The utility model relates to an engineering machine tool technical field, concretely relates to lock hydraulic control system and engineering machine tool that trades electrical system.
Background
Under the leading of national policy, under the condition that the battery and motor technology is mature day by day, the electric operation of the operation machine becomes great trend, and meanwhile, the application and the development of the battery charging and replacing technology are promoted due to the large electric quantity requirement of the operation machine.
The locking mechanism and control of the battery replacement system are important points of battery replacement technology, the battery replacement adopted by the current electric heavy truck usually adopts a telescopic locking mechanism controlled by a cylinder, but like an operation machine with large electric quantity demand such as an excavator, the weight of the whole battery system and the acceleration impact force under complex working conditions are large, and the locking force of the corresponding battery replacement lock is also large.
At present, a pneumatic locking mechanism is adopted for battery replacement of an electric heavy truck, a magnetic switch on an air cylinder is used for detecting that the battery is locked in place, and a battery replacement controller is used for detecting whether a signal feedback of the battery replacement controller in place of locking is carried out to determine whether the battery replacement is locked; the electric heavy truck adopts an air brake on the truck, and comprises an air source, an air valve and the like, so that other products are not required to be additionally added. And the operation machinery with larger electric quantity demand such as an excavator does not have an air source per se, and the cylinder locking mode is not suitable.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the unsuitable defect of excavator of pneumatic locking mode among the prior art to a locking hydraulic control system and engineering machine tool that trade the electrical system are provided.
In order to solve the problem, the utility model provides a trade locking hydraulic control system of electric system, include: the hydraulic pump is communicated with the oil tank, a rod cavity of the hydraulic cylinder and a rodless cavity of the hydraulic cylinder, and the rod cavity of the hydraulic cylinder and the rodless cavity of the hydraulic cylinder are communicated with the oil tank; the lock-up hydraulic control system has a lock-up state for supplying oil to a rodless cavity of the hydraulic cylinder and an unlock state for supplying oil to a rod cavity of the hydraulic cylinder by the hydraulic pump.
Optionally, the locking hydraulic control system further comprises a reversing valve, the reversing valve is provided with an oil inlet, an oil return port and two working oil ports, the oil inlet is communicated with the hydraulic pump, the two working oil ports are communicated with the rod cavity and the rodless cavity of the hydraulic cylinder in a one-to-one correspondence manner, and the oil return port is communicated with the oil tank.
Optionally, the locking hydraulic control system further includes a driving member, a pressure sensor and a controller, the pressure sensor is communicated with the rodless cavity of the hydraulic cylinder through a first oil return path, the pressure sensor is arranged on the first oil return path, the controller is electrically connected with the reversing valve, the pressure sensor and the driving member, and the controller controls the driving member and the reversing valve according to the pressure detected by the pressure sensor.
Optionally, the locking hydraulic control system further includes an accumulator, and the accumulator is communicated with the first oil return passage.
Optionally, the directional control valve includes two-position three-way directional control valves, each two-position three-way directional control valve has an oil inlet, an oil return port and a working oil port, the two-position three-way directional control valve has a first working position and a second working position, when the two-position three-way directional control valve is in the first working position, the oil inlet is communicated with the working oil port, when the two-position three-way directional control valve is in the second working position, the oil return port is communicated with the working oil port, when the locking hydraulic control system is in the locking state, the two-position three-way directional control valve is in the first working position, when the locking hydraulic control system is in the unlocking state, the two-position three-way directional control valve communicated with the rodless cavity of the hydraulic cylinder is in the second working position, and the two-position three-way directional control valve communicated with the rod cavity of the hydraulic cylinder is in the first working position.
Optionally, the reversing valve is a three-position four-way reversing valve, the two working oil ports are respectively a first working oil port and a second working oil port, the first working oil port is communicated with a rodless cavity of the hydraulic cylinder, the second working oil port is communicated with a rod cavity of the hydraulic cylinder, the three-position four-way reversing valve is provided with a first working position, a second working position and a third working position, when the three-position four-way reversing valve is in the first working position, the oil inlet is communicated with the first working oil port, the second working oil port is communicated with the oil return port, when the three-position four-way reversing valve is in the second working position, the oil inlet is not communicated with the first working oil port and the second working oil port, and when the three-position four-way reversing valve is in the third working position, the oil inlet is communicated with the second working oil port, and the first working oil port is communicated with the oil return port.
Optionally, the locking hydraulic control system further includes a hydraulic lock, and the two working oil ports are correspondingly communicated with the rod cavities and the rodless cavities of the hydraulic cylinder one by one through the hydraulic lock.
Optionally, the hydraulic lock includes two first check valves conducting to the hydraulic cylinder in one way, one first check valve is communicated with the rodless cavity and one working oil port of the hydraulic cylinder, and the other first check valve is communicated with the rod cavity and the other working oil port of the hydraulic cylinder.
Optionally, the locking hydraulic control system further comprises an overflow valve, the hydraulic pump and the oil inlet are communicated through an oil inlet path, the oil return port and the oil tank are communicated through a second oil return path, an overflow inlet of the overflow valve is communicated with the oil inlet path, and an overflow outlet of the overflow valve is communicated with the second oil return path.
The utility model also provides an engineering machine tool, include: the locking hydraulic system of the battery replacement system is provided.
The utility model has the advantages of it is following:
1. when the power exchanging system needs to be locked, the hydraulic pump is controlled to supply oil to the rodless cavity of the hydraulic cylinder, and the piston rod of the hydraulic cylinder extends out and locks the power exchanging system; when the power exchanging system needs to be unlocked, the hydraulic pump is controlled to supply oil to the rod cavity of the hydraulic cylinder, the piston rod of the hydraulic cylinder retracts to unlock the power exchanging system, and the locking and unlocking of the power exchanging system are controlled through hydraulic pressure, so that the locking force is larger, and the power exchanging system is more suitable for the power exchanging working conditions of engineering machinery such as excavators.
2. The locking hydraulic control system further comprises a driving piece, a pressure sensor and a controller, the pressure sensor is communicated with a rodless cavity of the hydraulic cylinder through a first oil return path, the pressure sensor is arranged on the first oil return path, the controller is electrically connected with the reversing valve, the pressure sensor and the driving piece, and the controller controls the driving piece and the reversing valve to make corresponding actions according to the pressure detected by the pressure sensor. The pressure sensor can detect the pressure in the first oil return way, namely the pressure on the side of the rodless cavity of the hydraulic cylinder, and then transmits the detected pressure signal to the controller, and the controller controls the reversing valve and the driving piece to realize in-place timely cutting-off and low-pressure monitoring and alarming and timely oil supplement, so that the system pressure is maintained in a design range, and the reliability and the safety of the system are improved.
3. The locking hydraulic control system also comprises an energy accumulator, and the energy accumulator is communicated with the first oil return way. The energy accumulator stores energy when being locked, the stored energy pressure reaches the upper limit of the set system pressure range, the pressure maintaining time is prolonged when the system is in pressure maintaining, the energy accumulator can achieve the purposes of supplementing oil and maintaining the system pressure in the system, frequent starting of a motor and frequent alarming are avoided, energy conservation can be realized, and the use satisfaction degree of a user can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic view of a locking hydraulic control system of a battery replacement system according to a first embodiment of the present invention;
fig. 2 shows a locking hydraulic control system schematic diagram of the battery replacement system according to the second embodiment of the present invention.
Description of reference numerals:
10. a drive member; 20. a hydraulic pump; 30. a diverter valve; 31. a two-position three-way reversing valve; 40. hydraulic locking; 41. a first check valve; 50. a hydraulic cylinder; 60. an oil tank; 70. a pressure sensor; 81. a first oil return path; 82. an oil inlet path; 83. a second oil return path; 90. an accumulator; 100. an overflow valve; 110. An on-off valve; 120. a second one-way valve; 130. and (3) a filter.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example one
As shown in fig. 1, the lockup hydraulic control system of the battery replacement system according to the present embodiment includes: the hydraulic pump 20 is communicated with the oil tank 60, the rod cavity of the hydraulic cylinder 50 and the rodless cavity of the hydraulic cylinder 50, and the rod cavity of the hydraulic cylinder 50 and the rodless cavity of the hydraulic cylinder 50 are communicated with the oil tank 60.
The locking hydraulic control system has a locking state and an unlocking state, when the locking hydraulic control system is in the locking state, the hydraulic pump 20 supplies oil to the rodless cavity of the hydraulic cylinder 50, and the piston rod of the hydraulic cylinder 50 extends out and locks the battery replacement system; when the locking hydraulic control system is in an unlocking state, the hydraulic pump 20 supplies oil to the rod cavity of the hydraulic cylinder 50, and the piston rod of the hydraulic cylinder 50 retracts to unlock the power conversion system.
When the locking hydraulic control system of the battery replacement system in this embodiment is used, and the battery replacement system needs to be locked, the hydraulic pump 20 is controlled to supply oil to the rodless cavity of the hydraulic cylinder 50, and the piston rod of the hydraulic cylinder 50 extends out and locks the battery replacement system; when the power exchanging system needs to be unlocked, the hydraulic pump 20 is controlled to supply oil to the rod cavity of the hydraulic cylinder 50, the piston rod of the hydraulic cylinder 50 retracts to unlock the power exchanging system, and the locking and unlocking of the power exchanging system are controlled through hydraulic pressure, so that the locking force is larger, and the power exchanging system is more suitable for power exchanging working conditions of engineering machinery such as excavators.
In this embodiment, the locking hydraulic control system further includes a reversing valve 30, the reversing valve 30 has an oil inlet, an oil return port, and two working oil ports, the oil inlet is communicated with the hydraulic pump 20, the two working oil ports are correspondingly communicated with the rod cavity and the rodless cavity of the hydraulic cylinder 50, and the oil return port is communicated with the oil tank 60. The switching between the locking state and the unlocking state of the locking hydraulic control system is realized through the reversing valve 30, and the control is simpler and more convenient. It will be appreciated that, as an alternative embodiment, the reversing valve 30 may not be provided and only two states may be switched by a plurality of lines and a plurality of valves.
In this embodiment, the lockup hydraulic control system further includes a driving element 10, a pressure sensor 70, and a controller, where the pressure sensor 70 is communicated with a rodless cavity of the hydraulic cylinder 50 through a first oil return path 81, the pressure sensor 70 is disposed on the first oil return path 81, the controller is electrically connected to the directional valve 30, the pressure sensor 70, and the driving element 10, and the controller controls the driving element 10 and the directional valve 30 to perform corresponding actions according to the pressure detected by the pressure sensor 70. The pressure sensor 70 can detect the pressure in the first oil return path 81, that is, the pressure at the side of the rodless cavity of the hydraulic cylinder 50, and then transmit the detected pressure signal to the controller, and the controller controls the reversing valve 30 and the driving member 10 to realize in-place timely cutting-off and low-pressure monitoring and alarming and timely oil supplement, and the like, so that the system pressure is maintained within the design range, and the reliability and the safety of the system are improved. Preferably, the driving member 10 is an electric motor, the output shaft of which is connected to the hydraulic cylinder 50 by a coupling.
In the present embodiment, the lockup hydraulic control system further includes an accumulator 90, and the accumulator 90 communicates with the first oil return passage 81. The energy accumulator 90 stores energy when locked, the stored energy pressure reaches the upper limit of the set system pressure range, the pressure maintaining time is prolonged when the system is in pressure maintaining, the energy accumulator can achieve the purposes of supplementing oil and maintaining the system pressure in the system, frequent starting of a motor and frequent alarming are avoided, energy conservation can be achieved, and the using satisfaction degree of a user can be improved.
In this embodiment, the reversing valve 30 includes two-position three-way reversing valves 31, each two-position three-way reversing valve 31 has an oil inlet, an oil return port and a working oil port, the two-position three-way reversing valve 31 has a first working position and a second working position, when the two-position three-way reversing valve 31 is in the first working position, the oil inlet is communicated with the working oil port, when the two-position three-way reversing valve 31 is in the second working position, the oil return port is communicated with the working oil port, when the locking hydraulic control system is in the locking state, the two-position three-way reversing valves 31 are in the first working position, when the locking hydraulic control system is in the unlocking state, the two-position three-way reversing valve 31 communicated with the rodless cavity of the hydraulic cylinder 50 is in the second working position, and the two-position three-way reversing valve 31 communicated with the rod cavity of the hydraulic cylinder 50 is in the first working position. When the locking and switching system is needed, the hydraulic pump 20 supplies oil to the rodless cavity of the hydraulic cylinder and also supplies oil to the rod cavity of the hydraulic cylinder, so that differential motion of the hydraulic cylinder can be realized, the piston rod of the hydraulic cylinder rapidly extends out for locking, the purpose of improving the extension speed of the hydraulic cylinder is realized without increasing a motor or a pump, and the locking time is shortened.
Preferably, the two-position three-way reversing valves 31 are electromagnetic valves, and when the power switching system needs to be locked, the two-position three-way reversing valves 31 are simultaneously powered on, and the two-position three-way reversing valves 31 are switched to the first working position, that is, the two-position three-way reversing valves 31 are in the left position. It should be noted that, when the two-position three-way directional valve 31 is not powered, the two-position three-way directional valve 31 is in the second working position, that is, the two-position three-way directional valve 31 is in the right position.
In this embodiment, the locking hydraulic control system further includes a hydraulic lock 40, and the two working oil ports are correspondingly communicated with the rod cavities and the rodless cavities of the hydraulic cylinder 50 through the hydraulic lock 40. The hydraulic lock 40 can greatly reduce the system leakage on the hydraulic cylinder side, and improve the pressure maintaining time and the system stability.
In this embodiment, the hydraulic lock 40 includes two first check valves 41 that are in one-way communication with the hydraulic cylinder 50, one first check valve 41 is in communication with the rodless cavity and one working port of the hydraulic cylinder 50, and the other first check valve 41 is in communication with the rod cavity and the other working port of the hydraulic cylinder 50. The two first non return valves 41 allow the hydraulic oil to flow only to the hydraulic cylinder, so as to ensure that the hydraulic cylinder can keep its position still even under a certain external load.
In this embodiment, the locking hydraulic control system further includes an overflow valve 100, the hydraulic pump 20 is communicated with the oil inlet through the oil inlet path 82, the oil return port is communicated with the oil tank 60 through the second oil return path 83, an overflow inlet of the overflow valve 100 is communicated with the oil inlet path 82, and an overflow outlet of the overflow valve 100 is communicated with the second oil return path 83. The overflow valve 100 plays a safety protection role in the system, when the system pressure exceeds a set value, the overflow valve 100 is opened, and a part of hydraulic oil in the system is discharged into the oil tank 60, so that the system pressure does not exceed an allowable value, and the system is ensured not to have an accident due to overhigh pressure.
In this embodiment, the oil inlet path 82 is provided with a second check valve that conducts to the oil inlet in one way. The second check valve allows hydraulic oil to flow only to the directional control valve 30 to prevent the shock of the load oil pressure fluctuation to the hydraulic pump.
In the present embodiment, the lockup hydraulic control system further includes an on-off valve 110, and the on-off valve 110 is provided on the first oil return passage 81. When the battery replacement system needs to be unlocked, the switch valve 110 is opened, and the oil in the rodless cavity of the hydraulic cylinder 50 can flow back to the oil tank 60 through the first oil return circuit 81; when the battery replacement system needs to be locked, the switch valve 110 is closed.
In this embodiment, the lockup hydraulic control system further includes a filter 130, the filter 130 is connected between the hydraulic pump 20 and the oil tank 60, and the filter 130 may filter impurities of the hydraulic oil, and the filtered hydraulic oil is sucked and delivered to the hydraulic cylinder 50 by the hydraulic pump 20.
In the present embodiment, the number of the hydraulic cylinders 50 is two, but the number of the hydraulic cylinders is not limited thereto.
The working process of the locking hydraulic control system of the power conversion system is explained as follows:
when the power switching system needs to be locked, a locking button is pressed down, the controller controls the motor and the two-position three-way reversing valves 31 to be powered on, the two-position three-way reversing valves 31 are switched to the left position, oil is fed into a rodless cavity of the hydraulic cylinder 50, meanwhile, oil is fed into a rod cavity of the hydraulic cylinder, differential motion of the hydraulic cylinder is achieved, a piston rod of the hydraulic cylinder extends out to be locked quickly, when the pressure sensor monitors that the pressure of the system rises to the lower limit of the set system pressure range, the two-position three-way reversing valve 31 communicated with the rod cavity of the hydraulic cylinder is powered off, the system continues boosting, the system stops boosting until the pressure reaches the upper limit of the set system pressure range, the locking is in place, and the pressure sensor feeds back to the controller to disconnect the motor and the reversing valves, so that locking is completed.
When the power switching system needs to be unlocked, the unlocking key is pressed, the controller controls the motor and the two-position three-way reversing valve 31 communicated with the rod cavity of the hydraulic cylinder to be powered on, the rod cavity of the hydraulic cylinder is filled with oil until the piston rod of the hydraulic cylinder is completely retracted, and the controller controls the motor and the two-position three-way reversing valve 31 communicated with the rod cavity of the hydraulic cylinder to be powered off, so that the unlocking process is completed.
Example two
As shown in fig. 2, a locking hydraulic control system of the battery replacement system in the second embodiment is different from that in the first embodiment in that a structure of the directional control valve is different, in the second embodiment, the directional control valve 30 is a three-position four-way directional control valve, two working oil ports are respectively a first working oil port and a second working oil port, the first working oil port is communicated with a rodless cavity of the hydraulic cylinder 50, the second working oil port is communicated with a rod cavity of the hydraulic cylinder 50, the three-position four-way directional control valve has a first working position, a second working position and a third working position, when the three-position four-way directional control valve is in the first working position, an oil inlet is communicated with the first working oil port, the second working oil port is communicated with an oil return port, when the three-position four-way directional control valve is in the second working position, the oil inlet is not communicated with the first working oil port and the second working oil port, and when the three-position four-way directional control valve is in the third working position, the oil inlet is communicated with the second working oil port, and the first working oil return port is communicated with the oil return port. The locking and unlocking of the locking hydraulic control system are realized through one reversing valve, the number of the valves is small, and the system structure is simplified.
The utility model also provides an engineering machine tool, it includes: the locking hydraulic system of the battery replacement system is provided.
In this embodiment, the engineering machine further includes a battery replacement system, where the battery replacement system includes a battery and the like, and the battery replacement system is implemented by using a structure in the prior art, which is not described in detail herein.
In this embodiment, the working machine is an excavator, a crane or a drilling rig, etc.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
1. the locking hydraulic system of the power switching system comprises a motor, a hydraulic pump 20, two-position three-way reversing valves 31, a hydraulic lock 40, a hydraulic cylinder 50, an oil tank 60, a second one-way valve 120 and the like, wherein the inlet of the second one-way valve 120 is communicated with the outlet of the hydraulic pump 20, the outlet of the second one-way valve 120 is communicated with oil inlets of the two-position three-way reversing valves 31, the second one-way valve 120 is used for preventing the impact of load oil pressure fluctuation on the hydraulic pump, the oil inlets of the two-position three-way reversing valves 31 are communicated, oil return ports of the two-position three-way reversing valves 31 are communicated and connected back to the oil tank 60, the working oil port of one two-position three-way reversing valve 31 is connected with the rodless cavity of the hydraulic cylinder, the working oil port of the other two-position three-way reversing valve 31 is connected with the rod cavity of the hydraulic cylinder, two reversing valves are powered on simultaneously, differential extension of the hydraulic cylinder can be achieved, the purpose of improving the extension speed of the hydraulic cylinder is achieved while a motor or a pump is not increased, the locking time is shortened, and the purpose of stable, effective and safe battery replacement locking control is achieved on the operation machinery with the battery replacement requirement.
2. The hydraulic lock 40 is composed of two first check valves 41, oil inlets of the two first check valves 41 are respectively connected with working oil ports of the two-position three-way reversing valves 31, and working oil ports of the two first check valves 41 are respectively connected with a rodless cavity and a rod cavity of the hydraulic cylinder, so that pressure maintaining is realized for the hydraulic cylinder for a long time, and frequent starting of a motor and the hydraulic pump is avoided to pressurize a system.
3. The energy accumulator 90 is arranged in an oil return path communicated with a rodless cavity of the hydraulic cylinder, and has the purposes of supplementing oil and maintaining system pressure, so that the pressure maintaining time of the system is prolonged, and frequent starting of a motor and frequent alarming are avoided.
4. The pressure sensor is arranged in an oil return path communicated with a rodless cavity of the hydraulic cylinder, the locking pressure of the hydraulic cylinder is monitored, a detected pressure signal is transmitted to the controller, in-place timely cutting-off and low-pressure monitoring alarming and oil supplementing are achieved, the pressure of the monitoring system is maintained within a design range, and the reliability and the safety of the system are improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A locking hydraulic control system of a battery replacement system is characterized by comprising: the hydraulic pump (20) is communicated with the oil tank (60), a rod cavity of the hydraulic cylinder (50) and a rodless cavity of the hydraulic cylinder (50), and the rod cavity of the hydraulic cylinder (50) and the rodless cavity of the hydraulic cylinder (50) are communicated with the oil tank (60);
wherein the lockup hydraulic control system has a lockup state in which oil is supplied to a rodless chamber of the hydraulic cylinder (50), and an unlock state in which oil is supplied to a rod chamber of the hydraulic cylinder (50) from the hydraulic pump (20).
2. The lockup hydraulic control system according to claim 1, further comprising a directional control valve (30), wherein the directional control valve (30) has an oil inlet, an oil return port, and two working oil ports, the oil inlet is communicated with the hydraulic pump (20), the two working oil ports are communicated with the rod chambers and the rodless chambers of the hydraulic cylinder (50) in a one-to-one correspondence, and the oil return port is communicated with the oil tank (60).
3. The lockup hydraulic control system according to claim 2, further comprising a driving member (10), a pressure sensor (70), and a controller, wherein the pressure sensor (70) is communicated with the rodless cavity of the hydraulic cylinder (50) through a first oil return path (81), the pressure sensor (70) is disposed on the first oil return path (81), the controller is electrically connected to the reversing valve (30), the pressure sensor (70), and the driving member (10), and the controller controls the driving member (10) and the reversing valve (30) according to a pressure detected by the pressure sensor (70).
4. The lockup hydraulic control system as recited in claim 3, further comprising an accumulator (90), the accumulator (90) being in communication with the first oil return passage (81).
5. The latching hydraulic control system according to any one of claims 2 to 4, wherein the directional control valve (30) includes two-position three-way directional control valves (31), each of the two-position three-way directional control valves (31) has an oil inlet, an oil return port, and a working oil port, the two-position three-way directional control valve (31) has a first working position and a second working position, the oil inlet and the working oil port are communicated when the two-position three-way directional control valve (31) is in the first working position, the oil return port and the working oil port are communicated when the two-position three-way directional control valve (31) is in the second working position, the two-position three-way directional control valves (31) are in the first working position when the latching hydraulic control system is in the latching state, the two-position three-way directional control valve (31) communicated with the rodless chamber of the hydraulic cylinder (50) is in the second working position, and the two-position three-way directional control valve (31) communicated with the rod chamber of the hydraulic cylinder (50) is in the first working position when the latching hydraulic control system is in the unlatching state.
6. The latching hydraulic control system according to any one of claims 2 to 4, wherein the selector valve (30) is a three-position four-way selector valve, the two working oil ports include a first working oil port and a second working oil port, the first working oil port is communicated with a rodless cavity of the hydraulic cylinder (50), the second working oil port is communicated with a rod cavity of the hydraulic cylinder (50), the three-position four-way selector valve has a first working position, a second working position and a third working position, when the three-position four-way selector valve is in the first working position, the oil inlet is communicated with the first working oil port, the second working oil port is communicated with the oil return port, when the three-position four-way selector valve is in the second working position, the oil inlet is not communicated with the first working oil port and the second working oil port, when the three-position four-way selector valve is in the third working position, the oil inlet is communicated with the second working oil port, and the first working oil port is communicated with the oil return port.
7. The latching hydraulic control system of any one of claims 2 to 4, further comprising a hydraulic lock (40), wherein the two working oil ports are in one-to-one correspondence communication with the rod chambers and the rodless chambers of the hydraulic cylinder (50) through the hydraulic lock (40).
8. The latching hydraulic control system of claim 7, wherein the hydraulic lock (40) includes two first check valves (41) that are in one-way communication with the hydraulic cylinder (50), one of the first check valves (41) being in communication with the rodless chamber of the hydraulic cylinder (50) and one of the working ports, and the other of the first check valves (41) being in communication with the rod chamber of the hydraulic cylinder (50) and the other of the working ports.
9. The lock-up hydraulic control system according to any one of claims 2 to 4, further comprising an overflow valve (100), wherein the hydraulic pump (20) and the oil inlet communicate through an oil inlet path (82), the oil return port and the oil tank (60) communicate through a second oil return path (83), an overflow inlet of the overflow valve (100) communicates with the oil inlet path (82), and an overflow outlet of the overflow valve (100) communicates with the second oil return path (83).
10. A work machine, comprising: the lock-up hydraulic system of the battery swapping system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220897052.3U CN217713121U (en) | 2022-04-18 | 2022-04-18 | Locking hydraulic control system of battery replacement system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220897052.3U CN217713121U (en) | 2022-04-18 | 2022-04-18 | Locking hydraulic control system of battery replacement system and engineering machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116608181A (en) * | 2023-05-19 | 2023-08-18 | 湖北盛达动力科技有限公司 | Combined power unit for replacing electricity of heavy truck |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608181A (en) * | 2023-05-19 | 2023-08-18 | 湖北盛达动力科技有限公司 | Combined power unit for replacing electricity of heavy truck |
| CN116608181B (en) * | 2023-05-19 | 2024-01-19 | 湖北盛达动力科技有限公司 | Combined power unit for replacing electricity of heavy truck |
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