Cab lifting system vacuum filling device

Abstract

The utility model relates to the field of oil filling in the automobile assembling process, in particular to a vacuum filling device for a cab lifting system. The hydraulic oil filling device aims at enabling hydraulic oil filling of a cab lifting system to be faster and more reliable, and meanwhile, compared with an existing full-automatic vacuum filling machine, the device purchasing and maintaining cost is reduced. The cab lifting system vacuum filling device comprises a vacuumizing trolley and a filling connector. The vacuumizing trolley is provided with an oil-gas separator, a waste liquid connector of the oil-gas separator is connected with a waste liquid tank through a hose, a gas outlet connector of the oil-gas separator is connected with a gas inlet of a filter through a hose, and a gas outlet of the filter is connected with an electric vacuum pump through a hose. The filling connector is composed of an oil storage cup with volume scales, a valve, a screw plug, a sealing ring, a three-way pipe, a vacuum degree detection component and a one-way valve, and the screw plug and the three-way pipe can rotate by 360 degrees and keep sealed. A gas inlet connector of the vacuumizing trolley oil-gas separator is connected with the filling connector three-way pipe through a hose.

Description

Technical Field

[0001] The present invention relates to the field of oil filling in an automobile assembly process, and in particular to a vacuum filling device for a cab lifting system. Background Art

[0002] The existing cab vacuum filling device adopts a fully automatic vacuum filling machine for filling. First, the lifting system is vacuumed, then the system is pressure-maintained for leakage detection, vacuumed for a second time, leaked again, pressure filled, and finally the excess hydraulic oil is sucked back. The fully automatic vacuum filling machine is easy to operate and has high working efficiency, but it has the disadvantages of complex filling equipment and high equipment purchase and maintenance costs. The manual filling method docks the filling bottle mouth with the hand oil pump filling port, and the hydraulic oil in the bottle is poured into the lifting system by gravity. The air in the lifting system is removed by repeatedly lifting the cab. The manual filling method is inefficient, and the labor intensity of repeatedly lifting the cab is high. If the air in the system is not completely removed, the following problems will also occur: the cab and the telescopic shaft locking mechanism cannot be unlocked, resulting in the inability to flip the cab; there is air in the lifting system, and the cab lifting process is not smooth, and the cab will suddenly sink; oil overflows from the hand oil pump when lifting the cab. Utility Model Content

[0003] The purpose of the present invention is to provide a cab lifting system vacuum filling device, which is used to improve the filling efficiency and filling quality when filling the cab lifting system, and prevent the residual air in the lifting system from making the cab and the telescopic shaft locking mechanism unable to be unlocked, resulting in the cab being unable to flip over, the cab suddenly sinking, and the oil overflowing from the hand oil pump when the cab is raised or lowered. At the same time, compared with the existing fully automatic vacuum filling machine, the equipment procurement and maintenance costs are greatly reduced.

[0004] In order to achieve the above-mentioned purpose, according to an embodiment of the present disclosure, there is provided a vacuum filling device for a cab lifting system, and the vacuum filling device includes a vacuum trolley and a filling joint. The vacuum trolley is equipped with an oil-gas separator, the waste liquid interface of the oil-gas separator is connected to the waste liquid tank through a hose, the air outlet interface of the oil-gas separator is connected to the air inlet of the filter through a hose, and the air outlet of the filter is connected to the electric vacuum pump through a hose. The filling joint is composed of an oil storage cup with a volume scale, a valve, a screw plug, a sealing ring, a three-way pipe, a vacuum detection component and a one-way valve, and the screw plug and the three-way pipe can rotate 360° and maintain a seal. The air inlet interface of the oil-gas separator of the vacuum trolley and the three-way pipe of the filling joint are connected by a hose.

[0005] According to an embodiment of the utility model, the electric vacuum pump is controlled by direct power switch.

[0006] According to an embodiment of the utility model, the vacuum detection component is a vacuum sensor, and the vacuum trolley is equipped with a controller and a control panel. The controller receives the vacuum sensor signal and the control panel signal to control the start and stop of the electric vacuum pump.

[0007] According to an embodiment of the utility model, the valve is a solenoid valve, and the controller controls the opening and closing of the solenoid valve.

[0008] According to an embodiment of the utility model, the controller detects the leakage status of the cab lifting system by detecting the change of the vacuum value sent by the vacuum sensor within a period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure. In the accompanying drawings:

[0010] Figure 1 It is a structural diagram of a vacuum filling device for a cab lifting system provided according to an embodiment of the present disclosure.

[0011] Figure 2 It is a control principle diagram of a controller provided according to an embodiment of the present disclosure.

[0012] 1. Oil storage cup with volume scale; 2. Valve; 3. Screw plug; 4. Sealing ring; 5. Tee pipe; 6. Vacuum detection component; 7. Check valve; 8. Hose; 9. Oil-gas separator; 10. Trolley; 11. Waste liquid tank; 12. Electric vacuum pump; 13. Filter; 14. Lifting oil tank; DETAILED DESCRIPTION

[0013] In order to make those skilled in the art better understand the present invention, the following Figure 1-Figure 2 The technical solution of the utility model is further explained.

[0014] The vacuum filling device of the cab lifting system of the embodiment of the utility model mainly consists of a vacuum trolley and a filling joint, which are connected by a hose 8. The filling joint consists of an oil storage cup 1 with a volume scale, a valve 2, a screw plug 3, a sealing ring 4, a three-way pipe 5, a vacuum detection component 6 and a one-way valve 7. The screw plug 3 and the three-way pipe 5 can rotate 360 ​​degrees and maintain a seal. The vacuum trolley consists of a trolley 10, an oil-gas separator 9, a waste liquid tank 11, a filter 13 and an electric vacuum pump 12.

[0015] When the cab lifting system is vacuum filled, the trolley 10 is hung on the production line vehicle and moves forward with the production line. The screw plug 3 of the filling joint is screwed to the filling port of the lifting oil tank 14 through a threaded connection and sealed by the sealing ring 4. The valve 2 is in a closed state. According to the requirements of the process document, a certain amount of hydraulic oil is added to the oil storage cup 1 with a volume scale. The filling amount can be directly read by the scale line on the outer wall of the oil storage cup 1 with a volume scale. Start the electric vacuum pump 12, and the air in the cab lifting system is sucked into the filling joint through the filling port of the lifting oil tank 14, and enters the vacuum trolley through the one-way valve 7 and the hose 8. The air mixed with oil and gas first passes through the oil-gas separator 9. After the hydraulic oil is separated, it flows into the waste liquid tank 11 through the waste liquid port of the oil-gas separator 9. The air enters the filter 13 from the outlet of the oil-gas separator. The filter 13 will further separate the moisture in the air, and the pure and dry air will enter the electric air compressor 12. The oil-gas mixture extracted from the cab lifting system is separated and dried by the oil-gas separator 9 and the filter 13 to obtain pure and dry air, which will protect the electric vacuum pump 12 and extend the service life of the electric vacuum pump 12. The vacuum detection component 6 installed on the filling joint monitors the vacuum value of the cab lifting system in real time. When the target vacuum is reached, the power supply of the vacuum pump 12 is turned off to stop working, the one-way valve 7 is closed, and the cab lifting system is in a vacuum state. At this time, the valve 2 is opened to allow the hydraulic oil in the volumetric oil storage cup 1 to flow into the cab lifting system under the action of gravity and atmospheric pressure, completing the vacuum filling process of the hydraulic oil.

[0016] In one embodiment of the utility model, the start and stop states of the electric vacuum pump 12 installed on the vacuum trolley are directly controlled by a power switch.

[0017] In one embodiment of the utility model, the vacuum detection component 6 is a vacuum sensor, and the vacuum trolley is installed with a controller 15 and a control panel 16. After pressing the start button of the control panel 16 on the vacuum trolley, the control panel 16 inputs a signal to the controller 15, and the controller 15 outputs a control signal to turn on the power of the electric vacuum pump 12 for vacuuming. The vacuum sensor 6 inputs a real-time vacuum value signal to the controller 15. When the vacuum value reaches a preset value, the controller 15 outputs a control signal to disconnect the power of the electric vacuum pump 12.

[0018] In one embodiment of the utility model, the valve 2 is a solenoid valve. When the controller 15 detects that the vacuum value input by the vacuum sensor 6 reaches a preset value, the controller 15 turns off the power supply of the electric vacuum pump 12, and then the controller 15 outputs a control signal to open the solenoid valve 2, so that the hydraulic oil flows into the cab lifting system.

[0019] In one embodiment of the utility model, the controller 15 receives the vacuum value signal sent by the vacuum sensor 6. When the preset value is reached, the controller 15 outputs a control signal to disconnect the power supply of the electric vacuum pump 12. The controller 15 continuously detects the vacuum signal sent by the vacuum sensor 6, and compares it with the vacuum change value preset by the controller 15 within a period of time. When it is higher than the preset vacuum change value, it indicates that there is a leak in the cab lifting system. The controller 15 sends an indication signal to the control panel 16 and lights up the corresponding warning light. When it is lower than the preset vacuum change value, the controller 15 sends an indication signal to the control panel 16 and lights up the normal pressure maintenance warning light.

[0020] The above embodiments are merely illustrative of the principles of the present invention, and all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A vacuum filling device for a cab lifting system, characterized in that: The vacuum filling device comprises: a vacuum trolley and a filling joint, which are connected by a hose; the filling joint is composed of an oil storage cup with a volume scale, a valve, a screw plug, a sealing ring, a three-way pipe, a vacuum detection component and a one-way valve, and the screw plug and the three-way pipe can rotate 360° and maintain a seal; the vacuum trolley is composed of a trolley, an oil-gas separator, a waste liquid tank, a filter and an electric vacuum pump.

2. A cab lifting system vacuum filling device according to claim 1, characterized in that: The electric vacuum pump is controlled by a power switch.

3. The vacuum filling device for a cab lifting system according to claim 1, characterized in that: The vacuum detection component is a vacuum sensor. The vacuum trolley is equipped with a controller and a control panel. The controller receives the vacuum sensor signal and the control panel signal to control the start and stop of the motor.

4. A cab lifting system vacuum filling device according to claim 1 or claim 3, characterized in that: The valve is a solenoid valve, and the controller controls the opening and closing of the solenoid valve.

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