Piston type electro-hydraulic lifting device

Abstract

The piston type electro-hydraulic lifting device comprises a cylinder barrel and a piston rod which are horizontally arranged, a piston is arranged at the right end of the piston rod and divides the interior of the cylinder barrel into a rod cavity and a pressure cavity, and the piston type electro-hydraulic lifting device further comprises an oil path block, a gear pump and an electric control valve; the right end of the cylinder barrel is of an open structure; a hollow cavity is formed in the piston rod, and the cavity is communicated with the rod cavity; the oil path block is installed and plugged at an opening in the right end of the cylinder barrel, and a plurality of independent oil channels are formed in the oil path block. A core pipe is arranged on the left side of the oil path block, extends into the piston rod and is communicated with the cavity; the gear pump and the electric control valve are both integrally arranged on the right side of the oil path block, the gear pump comprises a port A1 and a port B, and the electric control valve comprises a port P, a port O, a port A2 and a descending oil port; a port A1 of the gear pump and a port O of the electric control valve are respectively communicated with the core pipe through independent oil ducts, and a port B of the gear pump is communicated with a port P of the electric control valve through an independent oil duct; and a port A2 of the electric control valve and the descending oil port are respectively communicated with the pressure cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, in particular to a piston type electro-hydraulic lifting device. Background Art

[0002] Traditional car lifting devices mostly use hydraulic lifting devices, which have the following defects: 1. Large space occupation: Components such as oil cylinders and oil pumps are bulky, occupying valuable chassis space, restricting the optimization of vehicle layout, and especially affecting the battery layout of new energy vehicles.

[0003] 2. High cost: The manufacturing process is complex, which greatly increases the manufacturing cost of the entire vehicle.

[0004] 3. Inefficiency: maintenance is cumbersome and hydraulic oil is prone to leakage. Summary of the Invention

[0005] In response to the defects in the prior art, the purpose of the present invention is to provide a piston-type electro-hydraulic lifting device. Compared with the traditional hydraulic lifting system, it eliminates the hydraulic oil pipes and pipe joints, hydraulic cylinders, and has a smaller integrated layout, which reduces the installation space, makes the vehicle layout simpler, reduces costs, and improves production efficiency.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a piston type electro-hydraulic lifting device, comprising a horizontally arranged cylinder and a piston rod, the right end of the piston rod is provided with a piston, the piston divides the interior of the cylinder into a rod chamber and a pressure chamber, and also includes an oil circuit block, a gear pump and an electric control valve; the right end of the cylinder is an open structure; a hollow chamber is provided in the piston rod, and the chamber is connected to the rod chamber; the oil circuit block is installed and sealed at the open position of the right end of the cylinder, and a plurality of independent 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 electric control valve are integrated and arranged on the right side of the oil passage block, the gear pump includes an A1 port and a B port, and the electric control valve includes a P port, an O port, an A2 port and a descending oil port; the A1 port of the gear pump and the O port of the electric control valve are respectively communicated with the core tube through independent oil passages, and the B port of the gear pump is communicated with the P port of the electric control valve through an independent oil passage; the A2 port and the descending oil port of the electric control valve are respectively communicated with the pressure chamber.

[0007] A further improvement is that the electric control valve further includes a slow-down oil port, which is communicated with the pressure chamber.

[0008] A further improvement is that the A2 port, the descending oil port and the slow-descent oil port of the electric control valve are connected to the pressure chamber through independent oil channels respectively.

[0009] A further improvement is that it also includes a motor connected to the gear pump.

[0010] A further improvement is that it also includes a protective cover for covering the gear pump, the electric control valve and the motor, and the protective cover is provided with an electrical plug-in, which is electrically connected to the electric control valve and the motor respectively.

[0011] A further improvement is that the piston is provided with a one-way valve.

[0012] A further improvement is that it also includes an end cover, the left end of the cylinder is an open structure, and the end cover is installed and sealed at the open end of the left end of the cylinder.

[0013] A further improvement is that a guide sleeve is provided on the right side of the end cover to match the piston rod. A further improvement is that a lug seat is provided at the left end of the piston rod.

[0014] A further improvement is that: the piston rod is provided with a communicating hole, and the chamber is connected with the rod cavity through the communicating hole.

[0015] The beneficial effects of the present invention are: This invention allows for manual and remote control, enabling lifting, lowering, and slow descent. The system is an integrated structure that incorporates a motor, pump, cylinder, and valve. Compared to traditional hydraulic lifting systems, it eliminates the need for hydraulic oil pipes, pipe joints, and hydraulic cylinders. The integrated layout is smaller, reduces installation space, simplifies the overall vehicle layout, reduces costs, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the piston type electro-hydraulic lifting device in an embodiment of the present invention; Figure 2 A side view of a piston-type electro-hydraulic lifting device according to an embodiment of the present invention; Figure 3 for Figure 2 Cross-sectional view along the AA axis.

[0017] Reference numerals: 1-cylinder; 11-rod chamber; 12-pressure chamber; 2-piston rod; 21-piston; 22-chamber; 23-communication hole; 24-check valve; 25-ear seat; 3- oil passage block; 31- independent oil passage; 32- core tube; 4-gear pump; 41-A1 port; 42-B port; 5-Electronic control valve; 6-motor; 7-protective cover; 71-electrical plug-in; 8-end cover; 81-guide sleeve. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0019] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and should not be understood as limiting the specific scope of protection of the present invention.

[0020] The following description of the embodiments of the present invention is provided in conjunction with the accompanying drawings to further describe the specific embodiments of the present invention so that the technical solutions and beneficial effects of the present invention will be more clearly understood. The following description of the embodiments with reference to the accompanying drawings is illustrative and intended to explain the present invention, but is not to be construed as limiting the present invention.

[0021] See also Figures 1 to 3 As shown, an embodiment of the present invention provides a piston-type electro-hydraulic lifting device, including a horizontally arranged cylinder 1 and a piston rod 2, a piston 21 is provided at the right end of the piston rod 2, and the piston 21 divides the interior of the cylinder 1 into a rod chamber 11 and a pressure chamber 12, and also includes an oil circuit block 3, a gear pump 4 and an electric control valve 5.

[0022] The right end of the cylinder 1 is an open structure.

[0023] A hollow chamber 22 is provided within the piston rod 2, and this chamber 22 communicates with the rod cavity 11. Specifically, the piston 21 is provided with a one-way valve 24. The piston rod 2 is provided with a communication hole 23, through which the chamber 22 communicates with the rod cavity 11. An ear seat 25 is provided at the left end of the piston rod 2.

[0024] The oil passage block 3 is installed and sealed at the open end of the cylinder 1 , and a plurality of independent oil passages 31 are provided in 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 .

[0025] The gear pump 4 and the electric control valve 5 are both integrated and arranged on the right side of the oil circuit block 3. The gear pump 4 includes an A1 port 41 and a B port 42, and the electric control valve 5 includes a P port, an O port, an A2 port, and a descending oil port. The A1 port 41 of the gear pump 4 and the O port of the electric control valve 5 are respectively connected to the core tube 32 through independent oil passages 31, and the B port 42 of the gear pump 4 is connected to the P port of the electric control valve 5 through an independent oil passage 31. The A2 port and the descending oil port of the electric control valve 5 are respectively connected to the pressure chamber 12. Specifically, the electric control valve 5 also includes a slow-down oil port, which is connected to the pressure chamber 12. The A2 port, the descending oil port, and the slow-down oil port of the electric control valve 5 are respectively connected to the pressure chamber 12 through independent oil passages 31. In this embodiment, the electronically controlled valve 5 is an intelligent electronically controlled reversing valve (model: DKF-F100A) produced by Hubei Daqi Hydraulics Co., Ltd., and its corresponding Chinese patent is "An Intelligent Electronically Controlled Hydraulic Reversing Valve" (patent application number: 202320772871X).

[0026] See also Figure 3 As shown, the piston type electro-hydraulic lifting device further includes a motor 6 connected to the gear pump 4. In this embodiment, the motor 6 is a commonly used 3KW 220V permanent magnet synchronous motor.

[0027] See also 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 an electrical plug-in 71 is provided on the protective cover 7, and the electrical plug-in 71 is electrically connected to the electric control valve 5 and the motor 6 respectively.

[0028] See also Figure 3 As shown, the piston type electro-hydraulic lifting device also includes an end cover 8. The left end of the cylinder 1 is an open structure. The end cover 8 is installed and sealed at the open end of the cylinder 1. Specifically, a guide sleeve 81 is provided on the right side of the end cover 8 to match the piston rod 2. The working principle of the present invention is: When the power supply is input by the electrical plug-in, it is transmitted to the electric control valve and motor respectively. The controller controls the start and stop of the motor, and the electric control valve controls the oil circuit output to achieve rising, falling, slow falling and mid-stop actions.

[0029] When the cylinder performs the lifting action, the hydraulic oil in the rod chamber is sucked in from the A1 port of the gear pump through the chamber of the piston rod, the core shaft, and the independent oil channel in turn, flows out from the B port, and enters the P port of the electric control valve through the independent oil channel in the oil circuit block. By controlling the operation of the electric control valve, the hydraulic oil reaches the pressure chamber through the A2 port of the electric control valve. The pressure oil pushes the piston to the left, realizing the lifting action of the cargo box.

[0030] When the electric control valve reaches the middle stop position, the cargo box is in the middle stop state.

[0031] When the electric control valve reaches the slow-down position, the hydraulic oil in the pressure chamber is sucked in from the slow-down oil port of the electric control valve and flows out from the O port of the electric control valve. The hydraulic oil enters the rod chamber through the independent oil channel, core tube, and piston rod chamber in turn. The cylinder piston rod moves to the right, and the cargo box is in a slowly descending state.

[0032] When the electric control valve reaches the lowering position, the hydraulic oil in the pressure chamber is sucked in from the lowering oil port of the electric control valve and flows out from the O port of the electric control valve. The hydraulic oil enters the rod chamber through the independent oil channel, core tube, and piston rod chamber in turn. The cylinder piston rod moves to the right, and the cargo box is in a rapid descending state.

[0033] In the description of the specification, reference to the terms "one embodiment," "preferably," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. The schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0034] Through the description of the above structure and principle, technical personnel in the relevant technical field should understand that the present invention is not limited to the above specific implementation methods, and improvements and substitutions based on the present invention using the well-known technology in the field all fall within the scope of protection of the present invention 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), and the piston (21) divides the interior of the cylinder (1) into a rod chamber (11) and a pressure chamber (12), characterized in that: It also includes an oil circuit block (3), a gear pump (4) and an electric control valve (5); The right end of the cylinder (1) is an open structure; A hollow chamber (22) is provided in the piston rod (2), and the chamber (22) is communicated with the rod chamber (11); The oil passage block (3) is installed and sealed at the open end of the cylinder (1), and a plurality of independent oil passages (31) are provided in the oil passage block (3); a core tube (32) is provided on the left side of the oil passage block (3), and the core tube (32) extends into the piston rod (2) and communicates with the chamber (22); The gear pump (4) and the electric control valve (5) are both integrated and arranged on the right side of the oil circuit block (3); the gear pump (4) includes an A1 port (41) and a B port (42); the electric control valve (5) includes a P port, an O port, an A2 port and a descending oil port; the A1 port (41) of the gear pump (4) and the O port of the electric control valve (5) are respectively communicated with the core tube (32) through independent oil passages (31); the B port (42) of the gear pump (4) is communicated with the P port of the electric control valve (5) through the independent oil passage (31); the A2 port and the descending oil port of the electric control valve (5) are respectively communicated with the pressure chamber (12).

2. The piston-type electro-hydraulic lifting device according to claim 1, characterized in that: The electric control valve (5) further comprises a slow-down oil port, which is in communication with the pressure chamber (12).

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

4. The piston-type electro-hydraulic lifting device according to claim 1, characterized in that: It also includes a motor (6) connected to the gear pump (4).

5. The piston type electro-hydraulic lifting device according to claim 4, characterized 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-in (71) is provided on the protective cover (7), and the electrical plug-in (71) is electrically connected to the electric control valve (5) and the motor (6), respectively.

6. The piston type electro-hydraulic lifting device according to claim 1, characterized in that: The piston (21) is provided with a one-way valve (24).

7. The piston type electro-hydraulic lifting device according to claim 1, characterized in that: It also includes an end cover (8), the left end of the cylinder barrel (1) is an open structure, and the end cover (8) is installed and sealed at the open end of the left end of the cylinder barrel (1).

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

9. The piston type electro-hydraulic lifting device according to claim 1, characterized in that: The left end of the piston rod (2) is provided with an ear seat (25).

10. The piston type electro-hydraulic lifting device according to claim 1, characterized in that: The piston rod (2) is provided with a communicating hole (23), and the chamber (22) is communicated with the rod chamber (11) through the communicating hole (23).

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