Piston electro-hydraulic lifting device

Abstract

The utility model discloses a piston type electro-hydraulic lifting device, it includes horizontally arranged cylinder and piston rod, the right -hand end of piston rod is provided with the piston, this piston divides the cylinder inside into the rod cavity and pressure chamber, still includes oil passage piece, gear pump and electric control valve, the right -hand end of cylinder is the open structure, the chamber that is hollow is arranged in the piston rod, and the chamber is linked together with the rod cavity, the oil passage piece is installed and is cut off in the open mouth of cylinder right -hand end, and the oil passage piece is provided with a plurality of independent oil channels in, the left side of oil passage piece is provided with the core pipe, and this core pipe is inserted into piston rod and is linked together with the chamber, gear pump and electric control valve are all integratedly arranged in the right side of oil passage piece, and gear pump includes A1 mouth and B mouth, and electric control valve includes P mouth, O mouth, A2 mouth and lower oil port, the O mouth of electric control valve is communicated with the core pipe through independent oil channel respectively, and the P mouth of electric control valve is communicated with the B mouth of gear pump through independent oil channel, the A2 mouth of electric control valve and lower oil port are communicated with pressure chamber respectively.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a piston-type electro-hydraulic lifting device. Background Technology

[0002] Traditional car lifts mostly use hydraulic lifting devices, which have the following drawbacks:

[0003] 1. Large space occupation: The bulky components such as oil cylinders and oil pumps occupy valuable chassis space, which restricts the optimization of the overall vehicle layout, especially affecting the battery layout of new energy vehicles.

[0004] 2. High cost: The complex manufacturing process significantly increases the overall vehicle manufacturing cost.

[0005] 3. Low efficiency: Cumbersome maintenance and prone to hydraulic oil leakage. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a piston-type electro-hydraulic lifting device. Compared with traditional hydraulic lifting systems, it eliminates hydraulic oil pipes and pipe joints, hydraulic cylinders, and has a smaller integrated layout, reducing installation space, simplifying the overall vehicle layout, lowering costs, and improving production efficiency.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a piston-type electro-hydraulic lifting device, comprising a horizontally arranged cylinder and piston rod, wherein a piston is provided at the right end of the piston rod, the piston dividing the interior of the cylinder into a rod chamber and a pressure chamber, and further comprising an oil passage block, a gear pump and an electronically controlled valve; the right end of the cylinder is an open structure; a hollow chamber is provided inside the piston rod, and this chamber communicates with the rod chamber; the oil passage block is installed and seals the open end of the cylinder, and the oil passage block is provided with several independent... The oil passage has an upright oil passage; a core tube is provided on the left side of the oil passage block, which extends into the piston rod and communicates with the chamber; the gear pump and the electronic control valve are both integrated on the right side of the oil passage block, the gear pump includes port A1 and port B, and the electronic control valve includes port P, port O, port A2 and a downcomer port; port A1 of the gear pump and port O of the electronic control valve are respectively connected to the core tube through independent oil passages, and port B of the gear pump is connected to port P of the electronic control valve through an independent oil passage; port A2 and downcomer port of the electronic control valve are respectively connected to the pressure chamber.

[0008] A further improvement is that the electronically controlled valve also includes a slow-descent oil port, which is connected to the pressure chamber.

[0009] A further improvement is that the A2 port, the descent port, and the slow descent port of the electronically controlled valve are each connected to the pressure chamber through independent oil passages.

[0010] A further improvement is that it also includes a motor connected to the gear pump.

[0011] A further improvement is that it also includes a protective cover for housing the gear pump, the electric control valve, and the motor, and the protective cover is equipped with an electrical plug-in, which is electrically connected to the electric control valve and the motor respectively.

[0012] A further improvement is that the piston is equipped with a one-way valve.

[0013] A further improvement is that it also includes an end cap, wherein the left end of the cylinder is an open structure, and the end cap is installed and seals the open part of the left end of the cylinder.

[0014] A further improvement is that a guide sleeve adapted to the piston rod is provided on the right side of the end cap.

[0015] A further improvement is that an ear seat is provided at the left end of the piston rod.

[0016] A further improvement is that the piston rod is provided with a connecting hole, and the chamber is connected to the rod chamber through the connecting hole.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention allows for both manual and remote control, enabling lifting, lowering, and slow-descent movements. The system is an integrated structure comprising the motor, pump, cylinder, and valve. Compared to traditional hydraulic lifting systems, it eliminates hydraulic hoses and fittings, hydraulic cylinders, and features a smaller, more integrated layout, reducing installation space, simplifying the overall vehicle layout, lowering costs, and improving production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the piston-type electro-hydraulic lifting device in an embodiment of the present invention;

[0020] Figure 2 This is a side view of the piston-type electro-hydraulic lifting device in an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Sectional view along the AA direction.

[0022] Figure label:

[0023] 1-Cylinder; 11-Rod chamber; 12-Pressure chamber;

[0024] 2-Piston rod; 21-Piston; 22-Cavity; 23-Connecting hole; 24-One-way valve; 25-Ear seat;

[0025] 3-Oil manifold block; 31-Independent oil passage; 32-Core tube;

[0026] 4-Gear pump; 41-A1 port; 42-B port;

[0027] 5-Electrically controlled valve;

[0028] 6-Motor;

[0029] 7-Protective cover; 71-Electrical connector;

[0030] 8-End cap; 81-Guide sleeve. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0032] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0033] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0034] See Figures 1-3 As shown, this utility model embodiment provides a piston-type electro-hydraulic lifting device, including a horizontally arranged cylinder 1 and piston rod 2. A piston 21 is provided at the right end of the piston rod 2. The piston 21 divides the inside of the cylinder 1 into a rod chamber 11 and a pressure chamber 12. It also includes an oil passage block 3, a gear pump 4 and an electronically controlled valve 5.

[0035] The right end of cylinder 1 is an open structure.

[0036] The piston rod 2 has a hollow chamber 22, which communicates with the rod chamber 11; specifically, the piston 21 is equipped with a one-way valve 24. The piston rod 2 has a connecting hole 23, through which the chamber 22 communicates with the rod chamber 11. The left end of the piston rod 2 is provided with an ear seat 25.

[0037] The oil passage block 3 is installed and sealed at the open end of the cylinder 1, and several independent oil passages 31 are provided inside the oil passage block 3; a core tube 32 is provided on the left side of the oil passage block 3, which extends into the piston rod 2 and communicates with the chamber 22.

[0038] The gear pump 4 and the solenoid valve 5 are both integrated on the right side of the oil circuit block 3. The gear pump 4 includes port A1 41 and port B 42, and the solenoid valve 5 includes port P, port O, port A2, and a descent port. Port A1 41 of the gear pump 4 and port O of the solenoid valve 5 are connected to the core tube 32 through independent oil passages 31, and port B 42 of the gear pump 4 is connected to port P of the solenoid valve 5 through an independent oil passage 31. Port A2 and the descent port of the solenoid valve 5 are connected to the pressure chamber 12. Specifically, the solenoid valve 5 also includes a slow-descent port, which is connected to the pressure chamber 12. Port A2, the descent port, and the slow-descent port of the solenoid valve 5 are connected to the pressure chamber 12 through independent oil passages 31. In this embodiment, the electronically controlled valve 5 is an intelligent electronically controlled directional valve (model: DKF-F100A) produced by Hubei Daqi Hydraulic Co., Ltd., and its corresponding Chinese patent is "An Intelligent Electronically Controlled Hydraulic Directional Valve" (patent application number: 202320772871X).

[0039] See Figure 3 As shown, the piston-type electro-hydraulic lifting device also includes a motor 6 connected to the gear pump 4. In this embodiment, the motor 6 is a commonly used 3KW220V permanent magnet synchronous motor.

[0040] See Figure 3 As shown, the piston-type electro-hydraulic lifting device also includes a protective cover 7 for covering the gear pump 4, the electric control valve 5, and the motor 6, and the protective cover 7 is provided with an electrical plug 71, which is electrically connected to the electric control valve 5 and the motor 6 respectively.

[0041] See Figure 3 As shown, the piston-type electro-hydraulic lifting device also includes an end cap 8. The left end of the cylinder 1 is an open structure, and the end cap 8 is installed and seals the open end of the cylinder 1. Specifically, a guide sleeve 81 adapted to the piston rod 2 is provided on the right side of the end cap 8.

[0042] The working principle of this utility model is as follows:

[0043] When an electrical plug-in is input, the power is supplied to the electronic control valve and the motor respectively. The controller controls the motor to start and stop, and the electronic control valve controls the oil circuit output to achieve rising, falling, slow descent, and intermediate stop actions.

[0044] When the hydraulic cylinder performs the lifting action, the hydraulic oil in the rod chamber passes through the piston rod chamber, spindle, and independent oil passage in sequence, and is drawn in from port A1 of the gear pump, flows out from port B, and enters port P of the electric control valve through the independent oil passage in the oil circuit block. By controlling the operation of the electric control valve, the hydraulic oil reaches the pressure chamber through port A2 of the electric control valve. The pressure oil pushes the piston to move to the left, realizing the lifting action of the cargo box.

[0045] When the electronically controlled valve reaches the stop position, the cargo box enters a stop state.

[0046] When the solenoid valve reaches the slow-descent position, the hydraulic oil in the pressure chamber is drawn in from the slow-descent port of the solenoid valve and flows out from the O port of the solenoid valve. The hydraulic oil passes through the independent oil passage, the core tube, and the piston rod chamber in sequence and enters the rod chamber. The piston rod of the cylinder moves to the right, and the cargo box slowly descends.

[0047] When the solenoid valve reaches the lowering position, the hydraulic oil in the pressure chamber is drawn in from the lowering port of the solenoid valve and flows out from the O port of the solenoid valve. The hydraulic oil passes through the independent oil passage, the core tube, and the piston rod chamber in sequence and enters the rod chamber. The piston rod of the cylinder moves to the right, and the cargo box descends rapidly.

[0048] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A piston-type electro-hydraulic lifting device, comprising a horizontally arranged cylinder (1) and a piston rod (2), wherein a piston (21) is provided at the right end of the piston rod (2), the piston (21) dividing the interior of the cylinder (1) into a rod chamber (11) and a pressure chamber (12), characterized in that: It also includes an oil manifold (3), a gear pump (4), and an electronically controlled valve (5); The right end of the cylinder (1) is an open structure; The piston rod (2) is provided with a hollow chamber (22), and the chamber (22) is connected to the rod chamber (11); The oil passage block (3) is installed and sealed at the open end of the cylinder (1), and several independent oil passages (31) are provided inside the oil passage block (3); a core tube (32) is provided on the left side of the oil passage block (3), which extends into the piston rod (2) and communicates with the chamber (22); The gear pump (4) and the solenoid valve (5) are both integrated on the right side of the oil circuit block (3). The gear pump (4) includes port A1 (41) and port B (42). The solenoid valve (5) includes port P, port O, port A2 and a down port. Port A1 (41) of the gear pump (4) and port O of the solenoid valve (5) are connected to the core tube (32) through independent oil passages (31). Port B (42) of the gear pump (4) is connected to port P of the solenoid valve (5) through independent oil passages (31). Port A2 and down port of the solenoid valve (5) are connected to the pressure chamber (12).

2. A piston electro-hydraulic lifting device according to claim 1, characterised in that: The electronically controlled valve (5) also includes a slow-descent oil port, which is connected to the pressure chamber (12).

3. A piston electro-hydraulic lifting device according to claim 2, characterised in that: The A2 port, the descent port and the slow descent port of the solenoid valve (5) are connected to the pressure chamber (12) through independent oil passages (31).

4. The piston electro-hydraulic lifting device of claim 1, wherein: It also includes a motor (6) connected to the gear pump (4).

5. A piston electro-hydraulic lifting device according to claim 4, characterised in that: It also includes a protective cover (7) for covering the gear pump (4), the electric control valve (5), and the motor (6), and an electrical plug (71) is provided on the protective cover (7), which is electrically connected to the electric control valve (5) and the motor (6) respectively.

6. The piston electro-hydraulic lifting device of claim 1, wherein: The piston (21) is equipped with a one-way valve (24).

7. The piston electro-hydraulic lifting device of claim 1, wherein: It also includes an end cap (8), the left end of the cylinder (1) is an open structure, and the end cap (8) is installed and sealed at the open end of the cylinder (1).

8. A piston electro-hydraulic lifting device according to claim 7, characterised in that: The right side of the end cap (8) is provided with a guide sleeve (81) that is adapted to the piston rod (2).

9. The piston electro-hydraulic lifting device of claim 1, wherein: The piston rod (2) is provided with an ear seat (25) at its left end.

10. The piston electro-hydraulic lifting device of claim 1, wherein: The piston rod (2) is provided with a connecting hole (23), and the chamber (22) is connected to the rod chamber (11) through the connecting hole (23).

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