Power unit of lifting machine

Abstract

The utility model relates to a power unit of a lifting machine. The device comprises an oil tank, the oil supply assembly is connected with the oil tank; a first port of the first reversing valve is connected with the oil supply assembly, a second port of the first reversing valve is connected to the first oil outlet, and the first oil outlet is used for supplying oil to a lower cavity of a first oil cylinder of the first lifting platform; a first port of the second reversing valve is connected with the oil supply assembly, a second port of the second reversing valve is connected to a second oil outlet, and the second oil outlet is used for supplying oil to a lower cavity of a second oil cylinder of a second lifting platform; a first port of the third reversing valve is connected to the oil supplementing port, and a second port of the third reversing valve is connected to a second port of the first reversing valve; the oil supplementing opening, the lower cavity of the first oil cylinder and the upper cavity of the second oil cylinder are communicated with one another. The two-wheeled motorcycle can be lifted, the four-wheeled motorcycle can also be lifted, and high applicability and operation flexibility are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lift machines, in particular to a power unit of a lift machine. Background Art

[0002] A motorcycle lift machine is an important device for repairing and maintaining motorcycles and is widely used in motorcycle shops. The design of the existing power unit is only applicable to lifting specific types of motorcycles, such as two-wheel motorcycles or four-wheel motorcycles. The limitations of this design make it necessary for repair shops to be equipped with multiple different types of lift machines when facing the repair needs of different types of motorcycles, increasing the equipment cost and floor space. Summary of the Invention

[0003] Therefore, the utility model provides a power unit of a lift machine, which can lift both two-wheel motorcycles and four-wheel motorcycles, and has strong applicability and operation flexibility.

[0004] To solve the above technical problems, the utility model provides a power unit of a lift machine, including:

[0005] A fuel tank;

[0006] An oil supply assembly connected to the fuel tank;

[0007] A first reversing valve, a first port of the first reversing valve is connected to the oil supply assembly, a second port of the first reversing valve is connected to a first oil outlet, and the first oil outlet is used for supplying oil to a lower chamber of a first oil cylinder of a first lifting platform;

[0008] A second reversing valve, a first port of the second reversing valve is connected to the oil supply assembly, a second port of the second reversing valve is connected to a second oil outlet, and the second oil outlet is used for supplying oil to a lower chamber of a second oil cylinder of a second lifting platform;

[0009] A third reversing valve, a first port of the third reversing valve is connected to a make-up oil port, and a second port of the third reversing valve is connected to the second port of the first reversing valve;

[0010] Wherein, the first ports and the second ports of the first reversing valve, the second reversing valve and the third reversing valve can be communicated or disconnected respectively;

[0011] The make-up oil port, the lower chamber of the first oil cylinder and the upper chamber of the second oil cylinder are communicated with each other.

[0012] In an embodiment of the utility model, the oil supply assembly includes a pump assembly and a filter, and the pump assembly is connected to the fuel tank through the filter.

[0013] In an embodiment of the present utility model, the pump assembly includes a motor and a gear pump, and a coupling is provided between the driving end of the motor and the gear pump.

[0014] In an embodiment of the present utility model, a check valve is further included, and the check valve is disposed between the pump assembly and the first port of the first reversing valve and the first port of the first reversing valve.

[0015] In an embodiment of the present utility model, a first overflow valve and a buffer valve are respectively provided between the pump assembly and the fuel tank.

[0016] In an embodiment of the present utility model, a second overflow valve is provided between the oil replenishing port and the fuel tank.

[0017] In an embodiment of the present utility model, a fourth reversing valve and a balance valve are further included. The first port of the first reversing valve, the first port of the second reversing valve are connected to the first port of the fourth reversing valve, and the second port of the fourth reversing valve is connected to the fuel tank through the balance valve.

[0018] In an embodiment of the present utility model, the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve are all two-position two-way solenoid valves.

[0019] In an embodiment of the present utility model, a pump base and a valve block are further included. The fourth reversing valve, the balance valve, the check valve, the first overflow valve, the gear pump and the buffer valve are all installed on the pump base, and an inlet pipe and the filter are installed on the gear pump; the first reversing valve, the second reversing valve, the third reversing valve and the second overflow valve are all installed on the valve block.

[0020] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0021] The lifting machine power unit of the present utility model can not only lift two-wheel motorcycles, but also lift four-wheel motorcycles, realizing multi-purpose use of one machine. Compared with the prior art that requires multiple different types of lifting machines to meet the maintenance needs of different motorcycles, it effectively reduces the equipment cost and greatly improves the economy and flexibility of the equipment.

[0022] In the descending stage of the present utility model, the fourth reversing valve and the balance valve are used in cooperation, so that the platform can control the pressure release and speed during the descending process, ensuring the smooth and safe descent of the platform, improving the safety of operation and the stability of the platform descent, and reducing the risk of damage to the motorcycle.

[0023] All components of the power unit of the present utility model are installed on the pump base and the valve block. The modular installation makes the equipment more convenient for maintenance and replacement, with a compact structure, improving the maintainability and usability of the equipment. Description of the Drawings

[0024] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model in conjunction with the drawings.

[0025] Figure 1 is the hydraulic schematic diagram of the lifting machine power unit of the present utility model.

[0026] Figure 2 is the front view structural diagram of the lifting machine power unit of the present utility model.

[0027] Figure 3 is the left view structural diagram of the lifting machine power unit of the present utility model.

[0028] Figure 4 is the right view structural diagram of the lifting machine power unit of the present utility model.

[0029] Description of the Reference Numerals in the Drawings of the Specification:

[0030] 1. Oil tank; 2. Filter; 3. Gear pump; 4. Motor; 5. First overflow valve; 6. Check valve; 7. Buffer valve; 8. Second overflow valve; 9. Third reversing valve; 10. First reversing valve; 11. Second reversing valve; 12. Fourth reversing valve; 13. Balance valve; 14. Pump base; 16. Inlet pipe; 17. Coupling; 18. Valve block; 19. First oil cylinder; 20. Second oil cylinder;

[0031] P1. Second oil outlet; P2. Oil replenishing port; P3. First oil outlet. Detailed Embodiments

[0032] The following further illustrates the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0033] In the present utility model, when directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present utility model, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] In the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number; understandings such as "above", "below", "within", etc. include the corresponding number. In the description of the present utility model, if there is a description of "first" and "second", they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0035] In the present utility model, unless otherwise clearly defined, terms such as "arranged", "installed", "connected", etc. should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected, or electrically connected or capable of communicating with each other; they can be the connection inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in the present utility model in combination with the specific content of the technical solution.

[0036] Refer to Figure 1 As shown in

[0037] Fuel tank 1;

[0038] An oil supply assembly, connected to the fuel tank 1;

[0039] A first reversing valve 10, the first port of the first reversing valve 10 is connected to the oil supply assembly, the second port of the first reversing valve 10 is connected to a first oil outlet P3, and the first oil outlet P3 is used to supply oil to the lower chamber of a first oil cylinder 19 of a first lifting platform;

[0040] A second reversing valve 11, the first port of the second reversing valve 11 is connected to the oil supply assembly, the second port of the second reversing valve 11 is connected to a second oil outlet P1, and the second oil outlet P1 is used to supply oil to the lower chamber of a second oil cylinder 20 of a second lifting platform;

[0041] A third reversing valve 9, the first port of the third reversing valve 9 is connected to a make-up oil port P2, and the second port of the third reversing valve 9 is connected to the second port of the first reversing valve 10;

[0042] Wherein, the first ports and the second ports of the first reversing valve 10, the second reversing valve 11 and the third reversing valve 9 can be communicated or disconnected;

[0043] The make-up oil port P2, the lower chamber of the first oil cylinder 19 and the upper chamber of the second oil cylinder 20 are communicated with each other.

[0044] It should be understood that the first oil cylinder 19 and the second oil cylinder 20 are connected to the corresponding bottom of the platform through the piston rod assembly. The pistons of the piston rod assembly divide the first oil cylinder 19 and the second oil cylinder 20 into upper chambers and lower chambers respectively. When the lower chambers are filled with oil, the piston rod assembly is pushed to extend upward, thereby lifting the platform.

[0045] In one embodiment, the oil supply assembly includes a pump assembly and a filter 2. The pump assembly is connected to the fuel tank 1 through the filter 2.

[0046] The pump assembly includes a motor 4 and a gear pump 3. A coupling 17 is provided between the driving end of the motor 4 and the gear pump 3.

[0047] In one embodiment, a check valve 6 is further included. The check valve 6 is disposed between the pump assembly and the first port of the first directional control valve 10 and the first port of the first directional control valve 10. The setting of the check valve 6 can effectively prevent the oil from flowing back.

[0048] In one embodiment, a first relief valve 5 and a buffer valve 7 are respectively provided between the pump assembly and the fuel tank 1. A second relief valve 8 is provided between the oil replenishing port P2 and the fuel tank 1. When the system pressure is too high, the relief valve 5 can automatically relieve the pressure to avoid equipment damage. The buffer valve 7 provides buffering during the lifting or lowering process to ensure the smooth operation of the platform.

[0049] In one embodiment, a fourth directional control valve 12 and a balance valve 13 are further included. The first port of the first directional control valve 10, the first port of the second directional control valve 11 are connected to the first port of the fourth directional control valve 12. The second port of the fourth directional control valve 12 is connected to the fuel tank 1 through the balance valve 13. The design of the fourth directional control valve 12 and the balance valve 13 is used to control the oil flow and the lowering speed of the platform during the lowering stage to ensure the smooth and safe lowering of the platform.

[0050] In one embodiment, the first directional control valve 10, the second directional control valve 11, the third directional control valve 9 and the fourth directional control valve 12 are all two-position two-way solenoid valves, and all can adopt poppet-type directional control valves.

[0051] Refer to Figures 2 to 4As shown in the figure, for the convenience of installing the above-mentioned various components, the lifting machine power unit further includes a connected pump base 14 and a valve block 18. The fourth reversing valve 12, the balance valve 13, the one-way valve 6, the first overflow valve 5, the gear pump 3, and the buffer valve 7 are all installed on the pump base 14. The gear pump 3 is equipped with an oil inlet pipe 16 and the filter 2; the first reversing valve 10, the second reversing valve 11, the third reversing valve 9, and the second overflow valve 8 are all installed on the valve block 18. By modular installation on the pump base 14 and the valve block 18, the assembly and maintenance processes of the equipment are simplified. The modular design makes the operation more convenient when the equipment fails or components need to be replaced, reduces the downtime, and improves the maintainability and operation efficiency of the equipment.

[0052] The specific principle is as follows:

[0053] Lifting stage: After the motor 4 is powered on and starts, it drives the gear pump 3 through the coupling 17. The gear pump 3 sucks oil from the fuel tank 1. The oil passes through the filter 2 and the oil inlet pipe 16 and enters the gear pump 3, then enters the pump base 14, and enters the valve block 18 through the one-way valve 6. When the first reversing valve 10 is energized, the oil enters the lower cavity of the first oil cylinder 19 of the first lifting platform from the first oil outlet P3, and the two-wheeled motorcycle can be lifted; when the first reversing valve 10 and the third reversing valve 9 are energized simultaneously, oil is supplied to the lower cavity of the first oil cylinder 19 and the upper cavity of the second oil cylinder 20 through the oil replenishing port P2. When the pressure reaches the balance state, then the first reversing valve 10 and the third reversing valve 9 are closed, and the oil replenishing port P2 is closed; when the second reversing valve 11 is energized, the oil enters the lower cavity of the second oil cylinder 20 from the second oil outlet P1, so that the two lifting platforms are lifted simultaneously, and the four-wheeled motorcycle can be lifted.

[0054] In the above process, the fourth reversing valve 12 is not energized, and the first overflow valve 5 and the second overflow valve 8 play an overload protection role.

[0055] Lowering stage: The power supply of the motor 4 is disconnected, the motor 4 stops working, and the system is in a pressure-holding state. When the first reversing valve 10 and the fourth reversing valve 12 are energized, the first oil outlet P3 is depressurized; when the second reversing valve 11 and the fourth reversing valve 12 are energized, the second oil outlet P1 is depressurized, and the lowering speed is controlled by the balance valve 13.

[0056] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A lifting machine power unit, characterized in that, Comprising: Fuel tank (1); Fuel supply assembly, connected to the fuel tank (1); First reversing valve (10), the first port of the first reversing valve (10) is connected to the fuel supply assembly, the second port of the first reversing valve (10) is connected to the first oil outlet (P3), and the first oil outlet (P3) is used to supply oil to the lower chamber of the first oil cylinder (19) of the first lifting platform; Second reversing valve (11), the first port of the second reversing valve (11) is connected to the fuel supply assembly, the second port of the second reversing valve (11) is connected to the second oil outlet (P1), and the second oil outlet (P1) is used to supply oil to the lower chamber of the second oil cylinder (20) of the second lifting platform; Third reversing valve (9), the first port of the third reversing valve (9) is connected to the oil replenishing port (P2), and the second port of the third reversing valve (9) is connected to the second port of the first reversing valve (10); Wherein, the first ports and the second ports of the first reversing valve (10), the second reversing valve (11) and the third reversing valve (9) can be communicated or disconnected; The oil replenishing port (P2), the lower chamber of the first oil cylinder (19) and the upper chamber of the second oil cylinder (20) are interconnected.

2. The lifting machine power unit according to claim 1, wherein The fuel supply assembly includes a pump assembly and a filter (2), and the pump assembly is connected to the fuel tank (1) through the filter (2).

3. The lifting machine power unit according to claim 2, characterized in that, The pump assembly includes a motor (4) and a gear pump (3), and a coupling (17) is provided between the driving end of the motor (4) and the gear pump (3).

4. The lifting machine power unit according to claim 3, characterized in that, It further includes a check valve (6), and the check valve (6) is arranged between the pump assembly and the first port of the first reversing valve (10) and the first port of the first reversing valve (10).

5. The lifting machine power unit according to claim 4, characterized in that, A first relief valve (5) and a buffer valve (7) are respectively arranged between the pump assembly and the fuel tank (1).

6. The lifting machine power unit according to claim 5, characterized in that, A second relief valve (8) is arranged between the oil replenishing port (P2) and the fuel tank (1).

7. A lifting machine power unit according to claim 6, characterized in that, It further includes a fourth reversing valve (12) and a balance valve (13), the first ports of the first reversing valve (10) and the second reversing valve (11) are respectively connected to the first port of the fourth reversing valve (12), and the second port of the fourth reversing valve (12) is connected to the fuel tank (1) through the balance valve (13).

8. A lifting machine power unit according to claim 7, characterized in that, The first reversing valve (10), the second reversing valve (11), the third reversing valve (9) and the fourth reversing valve (12) are all two-position two-way solenoid valves.

9. The lifting machine power unit according to claim 8, characterized in that, It further includes a connected pump base (14) and a valve block (18), the fourth reversing valve (12), the balance valve (13), the check valve (6), the first relief valve (5), the gear pump (3) and the buffer valve (7) are all installed on the pump base (14), and the gear pump (3) is equipped with an inlet pipe (16) and the filter (2); the first reversing valve (10), the second reversing valve (11), the third reversing valve (9), and the second relief valve (8) are all installed on the valve block (18).

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