CN216767963U - Pressure signal speed regulating system of electric loader - Google Patents
Pressure signal speed regulating system of electric loader Download PDFInfo
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- CN216767963U CN216767963U CN202122673431.2U CN202122673431U CN216767963U CN 216767963 U CN216767963 U CN 216767963U CN 202122673431 U CN202122673431 U CN 202122673431U CN 216767963 U CN216767963 U CN 216767963U
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Abstract
The utility model discloses a pressure signal speed regulating system of an electric loader, which relates to the technical field of electric loaders and comprises a hydraulic pilot valve, a pilot type hydraulic multi-way valve and a pressure sensor, wherein the pressure sensor is installed on an oil path of the hydraulic pilot valve, and the hydraulic pilot valve is connected with oil cavities at two ends of a valve rod of the pilot type hydraulic multi-way valve and used for controlling the valve rod of the pilot type hydraulic multi-way valve to move; the pilot hydraulic multi-way valve is connected with a lifting cylinder and a tipping bucket cylinder through an oil path in a rolling mode, and a plurality of overflow valves are installed among the pilot hydraulic multi-way valve, the lifting cylinder and the tipping bucket cylinder. The utility model can control the operation of the pilot-operated hydraulic multi-way valve only by arranging the pressure sensor and the hydraulic pilot valve, thereby realizing the operation of the lifting cylinder and the overturning cylinder, avoiding using a plurality of sensors, reducing the fault points of the vehicle, reducing the overflow of the pilot-operated hydraulic multi-way valve and avoiding the high temperature caused by the circulation of hydraulic oil.
Description
Technical Field
The utility model relates to the technical field of electric loaders, in particular to a pressure signal speed regulating system of an electric loader.
Background
The power part of the electric loader applied to the engineering machinery is provided by a walking motor and a pump control motor, wherein the walking motor can be controlled by an accelerator pedal, the pump control motor works to output hydraulic oil to a working mechanism, the hydraulic oil returns to an oil tank after work is done, the working mechanism is slow or fast according to the requirements of working conditions, the required working hydraulic oil is more in the fast state, and the required working hydraulic oil is less in the slow state. Therefore, a set of working device is needed to sense the operation system, the working speed is detected according to the operation amplitude of the operation system, the magnitude of an electric signal generated by the working device is fed back to the VCU of the whole vehicle controller, the VCU analyzes data according to the given signal and outputs a signal to the controller of the pump control motor, the rotating speed of the pump control motor is controlled by the magnitude of the output current of the controller, oil is discharged more when the rotating speed is high, oil is discharged less when the rotating speed is low, and the risk of overhigh oil temperature caused by power saving and multi-way valve overflow is achieved.
The defects that a plurality of sensors are needed to be installed, each sensor corresponds to one action, so that the sensors need to be subjected to data matching, a plurality of VCU signal input ports are occupied, and the number of sensors is increased to increase the number of fault points of a vehicle. Based on the situation, new technical improvements are made.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pressure signal speed regulating system of an electric loader, which solves the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: a pressure signal speed regulating system of an electric loader comprises a hydraulic pilot valve, a pilot type hydraulic multi-way valve and a pressure sensor, wherein the pressure sensor is installed on an oil path of the hydraulic pilot valve, and the hydraulic pilot valve is connected with oil cavities at two ends of a valve rod of the pilot type hydraulic multi-way valve and used for controlling the valve rod of the pilot type hydraulic multi-way valve to move;
the pilot hydraulic multi-way valve is connected with a lifting cylinder and a tipping bucket cylinder through an oil path in a rolling mode, and a plurality of overflow valves are installed among the pilot hydraulic multi-way valve, the lifting cylinder and the tipping bucket cylinder.
Preferably, the pressure sensor is provided with one and is installed at the oil inlet end of the hydraulic pilot valve to convert the magnitude of the hydraulic oil pressure into an electric signal.
Preferably, the number of the pressure sensors is 4, the pressure sensors are arranged at the oil outlet end of the hydraulic pilot valve and are respectively arranged on lifting, descending, tipping bucket and collecting bucket oil way pipelines in a control oil way, and the pressure of the hydraulic oil is converted into an electric signal.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model can control the operation of the pilot-operated hydraulic multi-way valve only by arranging the pressure sensor and the hydraulic pilot valve, thereby realizing the operation of the lifting cylinder and the overturning cylinder, avoiding using a plurality of sensors, reducing the fault points of the vehicle, reducing the overflow of the pilot-operated hydraulic multi-way valve and avoiding the high temperature caused by the circulation of hydraulic oil.
Drawings
FIG. 1 is a schematic diagram of the prior art;
FIG. 2 is a schematic diagram of hydraulic connection of embodiment 1 of the present invention;
fig. 3 is a hydraulic connection schematic diagram of embodiment 2 of the present invention.
In the figure: 1. a pressure sensor; 2. a hydraulic pilot valve; 3. a pilot hydraulic multi-way valve; 4. a lifting cylinder; 5. a tipping bucket cylinder; 6. an overflow valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The hydraulic executing parts on the electric loader are a lifting cylinder and a tipping bucket cylinder, hydraulic oil for pushing the lifting cylinder and the tipping bucket cylinder comes from a multi-way valve, the action speed of the tipping bucket cylinder and the lifting cylinder depends on the quantity of oil supplied by the multi-way valve, 2 factors are related to the quantity of oil supply, one factor is that a gear pump can provide oil required during working, and the other factor is that the size of the oil conveyed to the lifting cylinder and the tipping bucket cylinder is controlled by the opening size of a valve rod when the oil passes through the multi-way valve.
When the lifting cylinder and the tipping bucket cylinder need to work in full force, the pump motor drives the gear pump to work at full power to convey sufficient hydraulic oil, the valve rod is opened to the maximum, and all the hydraulic oil is conveyed to the lifting cylinder and the tipping bucket cylinder.
When the lifting cylinder and the tipping bucket cylinder need to work slowly, the pump motor can transmit sufficient hydraulic oil if working fully, at the moment, the valve rod can only open one part according to the requirement, so that part of the hydraulic oil enters the lifting cylinder and the tipping bucket cylinder, and under the condition, the redundant hydraulic oil enters the oil return port of the multi-way valve through the overflow channel and flows back to the hydraulic oil tank, so that the power loss of the hydraulic system can be caused.
The electric loader adopts a pilot hydraulic multi-way valve, two ends of a valve rod of the multi-way valve are respectively provided with an oil cavity, hydraulic oil in the oil cavities comes from a hydraulic pilot valve, the hydraulic pilot valve changes the pressure in the oil cavities by controlling the pressure of the output hydraulic oil, the valve rod of the multi-way valve moves under the action of the pressure, a channel on the valve rod is communicated with a channel on a valve body in the moving process, and the hydraulic oil enters a lifting cylinder and a tipping bucket cylinder.
Example 1
Referring to fig. 1-2, the present embodiment provides a pressure signal speed regulating system for an electric loader, which includes a hydraulic pilot valve 2, a pilot hydraulic multi-way valve 3, and a pressure sensor 1 (also called as a pressure transmitter), wherein the pressure sensor 1 is installed at an oil inlet end of the hydraulic pilot valve 2, and the pressure sensor 1 converts the hydraulic oil pressure into an electrical signal, which is a general output signal: 4-20 mA; 1-5V; 0-10V; 0-5V; (the model number is RS485), the hydraulic pilot valve 2 of 0-5V adopted in the implementation is connected with oil cavities at two ends of a valve rod of the pilot hydraulic multi-way valve 3 and used for controlling the valve rod of the pilot hydraulic multi-way valve 3 to move.
The pilot hydraulic multi-way valve 3 is connected with a lifting cylinder 4 and a tipping bucket cylinder 5 through an oil path in a rolling way, and a plurality of overflow valves 6 are arranged between the pilot hydraulic multi-way valve 3 and the lifting cylinder 4 as well as between the pilot hydraulic multi-way valve and the tipping bucket cylinder 5.
When the actuator lifting cylinder 4 and the tipping bucket cylinder 5 need to work, a valve rod or a handle of the hydraulic pilot valve 2 is manually controlled, the lifting cylinder extends out of the large arm to lift generally backwards, the lifting cylinder retracts to retract forwards, the large arm falls, the tipping bucket extends out of the tipping bucket cylinder leftwards, the bucket retracts, the tipping bucket retracts rightwards, and the tipping bucket is tipped.
The size of the broken handle controls the size of hydraulic oil pressure in a pilot hydraulic valve 2, the size of the opening of a valve rod is controlled by the pressure of the hydraulic oil greatly, meanwhile, the pressure of the hydraulic oil is converted into a voltage signal through a pressure sensor 1, the voltage signal is input into a vehicle control unit VCU on a vehicle, the vehicle control unit VCU is converted into a rotating speed signal of a pump motor through the voltage signal, the rotating speed signal is input into a pump controller, the pump controller converts the rotating speed signal into current, the current is supplied to the pump motor through a cable, the pump motor outputs corresponding rotating speed according to the current, the pump motor is connected with a gear pump, the rotating of the gear pump is driven by the rotating of the pump motor to output the hydraulic oil to a pilot hydraulic multi-way valve 3, the pilot hydraulic multi-way valve 3 divides the incoming hydraulic oil into two ways, each way is provided with 2 interfaces, one way is connected with oil inlet and return oil of a lifting cylinder, and the other way is connected with oil inlet and return oil of a tipping bucket cylinder, the hydraulic pilot valve 2 moves the valve rod of the pilot hydraulic multi-way valve 3 through the pressure of hydraulic oil in the pilot hydraulic pilot valve, so that the pilot hydraulic multi-way valve 3 is controlled to be opened and closed, and oil inlet, oil return or closing is conducted.
In the early stage, through calculation and matching, the hydraulic oil output by the gear pump approximately meets the hydraulic oil required by the lifting cylinder 4 and the tipping bucket cylinder 3 in the state, and the pilot type hydraulic multi-way valve 3 does not overflow or slightly overflows, so that the condition of high temperature caused by power saving and no excessive circulation of the hydraulic oil is achieved.
Example 2
The difference from example 1 is that: as shown in fig. 1 and 3, the oil outlet end of the hydraulic pilot valve is connected with pressure sensors, i.e. 4 in normal condition, and respectively connected to the lifting, descending, tipping and receiving oil paths in the pilot control oil path. The specific work is as follows: when an actuating element lifting cylinder and a tipping bucket cylinder need to work, a valve rod or a handle of a hydraulic pilot valve 2 is manually controlled, generally, a lifting cylinder 4 extends backwards to lift a large arm, the lifting cylinder 4 retracts forwards to retract the large arm, the large arm falls, a tipping bucket cylinder 5 extends leftwards to retract a bucket; and the bucket cylinder 5 is retracted to the right, and the bucket is used for bucket tipping.
The size that the handle was broken off with fingers and thumb is controlling the size of guide's hydraulic oil pressure, the size that the valve rod was opened is being controlled to hydraulic oil pressure greatly little, hydraulic oil pressure converts a voltage signal through pressure sensor 1 simultaneously, owing to connect 4 pressure sensor 1, consequently, there is 4 way voltage signal feedbacks, voltage signal input vehicle control unit VCU on the car, vehicle control unit VCU passes through voltage signal conversion and becomes the rotational speed signal of a pump motor, rotational speed signal input pump controller, the pump controller changes rotational speed signal into the electric current, give the pump motor through the cable with the electric current, the pump motor is according to the corresponding rotational speed of electric current output, the pump motor connects the gear pump, the rotatory output hydraulic oil that drives the gear pump through the rotation of pump motor reaches guide's hydraulic pressure multiple unit valve 3. The pilot hydraulic multi-way valve 3 divides the incoming hydraulic pressure into two paths, each path has 2 interfaces, one path is connected with the oil inlet and the oil return of the lifting cylinder 4, and the other path is connected with the oil inlet and the oil return of the tipping bucket cylinder 5. The hydraulic pilot valve 2 controls the opening and closing of the pilot hydraulic multi-way valve 3, so that the 3 functions of oil inlet, oil return or closing are switched on. The cylinder diameters, the available cross-sectional areas, the strokes, the quantities and the speeds of the lifting cylinder 4 and the tipping bucket cylinder 5 are different, so that the quantities of hydraulic oil required by the 4 actions of lifting, descending, tipping bucket and collecting bucket are different, the action amplitude of the hydraulic pilot valve 2, the opening size of the valve rod of the pilot hydraulic multi-way valve 3 and the rotating speed of the pump motor are matched one by one in the earlier stage through the 4 actions, the hydraulic oil output by the gear pump just meets the hydraulic oil required by the lifting cylinder 4 and the tipping bucket cylinder 5 in a changed state, and the pilot hydraulic multi-way valve 3 does not overflow, so that the condition of high temperature caused by the circulation of power saving and no excessive hydraulic oil is achieved.
Because the cylinder diameters, available cross-sectional areas, strokes, quantities and speeds of the lifting cylinder and the tipping bucket cylinder are different, and the required oil is different, the embodiment 1 can only adopt the standard of the lifting cylinder, so that the oil consumption and the oil supply quantity of the tipping bucket cylinder are different, excessive overflow of the multi-way valve can be caused in the tipping bucket process, and the overflow condition can also occur. And in the embodiment 2, 4 actions of the lifting cylinder and the tipping bucket cylinder are respectively controlled, so that the accuracy is higher. However, a large amount of matching verification needs to be performed in the early stage, 4 paths of signals are output at the same time, ports of a VCU of the vehicle controller need to be increased, and meanwhile, the program is more complex.
The VCU is a core electronic control unit for realizing vehicle control decision. Generally, only new energy vehicles are equipped with conventional fuel vehicles without such devices. The VCU judges the driving intention of the driver by collecting signals of an accelerator pedal, a gear, a brake pedal and the like. By monitoring the speed, temperature and other information of the vehicle, the VCU can judge and process the information, then send a vehicle running state control command to the power battery system and control the running mode of the vehicle-mounted accessory power supply system. The VCU has fault diagnosis, protection and storage functions on the whole vehicle system, and is widely applied to electric vehicles.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides an electric loader pressure signal speed control system which characterized in that: the hydraulic pilot valve comprises a hydraulic pilot valve (2), a pilot type hydraulic multi-way valve (3) and a pressure sensor (1), wherein the pressure sensor (1) is installed on an oil path of the hydraulic pilot valve (2), and the hydraulic pilot valve (2) is connected with oil cavities at two ends of a valve rod of the pilot type hydraulic multi-way valve (3) and used for controlling the valve rod of the pilot type hydraulic multi-way valve (3) to move;
the pilot hydraulic multi-way valve (3) is connected with a lifting cylinder (4) and a tipping bucket cylinder (5) in a rolling mode through an oil path, and a plurality of overflow valves (6) are installed among the pilot hydraulic multi-way valve (3), the lifting cylinder (4) and the tipping bucket cylinder (5).
2. The pressure signal speed regulation system of the electric loader according to claim 1, characterized in that: the hydraulic pilot valve is characterized in that one pressure sensor (1) is arranged at the oil inlet end of the hydraulic pilot valve (2) and used for converting the pressure of hydraulic oil into an electric signal.
3. The pressure signal governor system of an electric loader of claim 1, wherein: the pressure sensors (1) are provided with 4, are arranged at the oil outlet end of the hydraulic pilot valve (2), and are respectively arranged on lifting, descending, tipping bucket and bucket collecting oil way pipelines in a control oil way to convert the pressure of hydraulic oil into an electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122673431.2U CN216767963U (en) | 2021-11-03 | 2021-11-03 | Pressure signal speed regulating system of electric loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122673431.2U CN216767963U (en) | 2021-11-03 | 2021-11-03 | Pressure signal speed regulating system of electric loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216767963U true CN216767963U (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122673431.2U Active CN216767963U (en) | 2021-11-03 | 2021-11-03 | Pressure signal speed regulating system of electric loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216767963U (en) |
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2021
- 2021-11-03 CN CN202122673431.2U patent/CN216767963U/en active Active
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