Telescopic electro-hydraulic lifting device

Abstract

This utility model discloses a sleeve-type electro-hydraulic lifting device, including a cylinder, piston rod, multi-stage sleeve, oil manifold block, gear pump, and electric control valve. The right end of the cylinder is an open structure, and the chamber formed between the cylinder and the outermost sleeve is an outer rod chamber. A first connecting channel is provided in the side wall of the cylinder. The chamber formed between each pair of adjacent sleeves is a middle rod chamber. A second connecting channel is provided in the side wall of the sleeve. The chamber formed between the piston rod and the innermost sleeve is an inner rod chamber. The oil manifold block is installed and sealed at the open end of the cylinder, and several independent oil passages are provided in the oil manifold block. The chamber formed between the oil manifold block and each piston is a pressure chamber. The gear pump and the electric control valve are both integrated on the right side of the oil manifold block. The A1 port of the gear pump and the O port of the electric control valve are respectively connected to the first connecting channel through independent oil passages, and the B port of the gear pump is connected to the P port of the electric control valve. The A2 port and the lowering oil port of the electric control valve are respectively connected to the pressure chamber.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a sleeve-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 sleeve-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 sleeve-type electro-hydraulic lifting device, comprising a horizontally arranged cylinder, a piston rod and a multi-stage sleeve inside the cylinder, the multi-stage sleeve comprising several sleeves nested sequentially from the inside to the outside, the piston rod being disposed in the innermost sleeve, and a first piston being disposed at the right end of the piston rod, and a second piston being disposed at the right end of the sleeve; further comprising an oil passage block, a gear pump and an electronically controlled valve; the right end of the cylinder is an open structure, and the chamber formed between the cylinder and the outermost sleeve is an outer rod cavity; a first connecting channel is provided in the side wall of the cylinder, and a first connecting port for connecting to the first connecting channel is provided at the left end of the inner side wall of the cylinder; the chamber formed between each pair of adjacent sleeves is a middle rod cavity; a second connecting channel is provided in the side wall of the sleeve, and the inner... A second connection port for connecting to the second connecting channel is provided at the left end of the side wall, and a third connection port for connecting to the second connecting channel is provided at the right end of the outer side wall of the sleeve; the chamber formed between the piston rod and the innermost sleeve is an inner rod chamber; the oil passage block is installed and sealed at the open end of the cylinder, and several independent oil passages are provided in the oil passage block; the chamber formed between the oil passage block and each piston is a pressure chamber; the gear pump and the electric 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 electric control valve includes port P, port O, port A2 and a down-feed port; the A1 port of the gear pump and the O port of the electric control valve are respectively connected to the first connecting channel through independent oil passages, and the B port of the gear pump is connected to the P port of the electric control valve through an independent oil passage; the A2 port and the down-feed port of the electric 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 both the first piston and the second piston are equipped with one-way valves.

[0013] A further improvement is that an ear seat is provided at the left end of the piston rod.

[0014] A further improvement is that the piston rod has a hollow structure.

[0015] A further improvement is that the multi-stage sleeve includes two nested sleeves.

[0016] A further improvement is that when the multi-stage sleeve is in a contracted state, each second connection port is flush with the first connection port, and in each pair of adjacent sleeves, the third connection port of the outer sleeve is displaced to the left of the third connection port of the inner sleeve.

[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 structure of the sleeve-type electro-hydraulic lifting device in the embodiment of this utility model;

[0020] Figure 2 for Figure 1 The right view;

[0021] Figure 3 This is a cross-sectional view of the sleeve-type electro-hydraulic lifting device in an embodiment of this utility model.

[0022] Figure label:

[0023] 1-Cylinder; 11-First connecting channel; 12-First connecting port; 13-Outer rod chamber; 14-Pressure chamber;

[0024] 2-Piston rod; 21-First piston; 22-Inner rod chamber; 23-Ear seat;

[0025] 3-Sleeve; 31-Second piston; 32-Second connecting channel; 33-Second connecting port; 34-Third connecting port; 35-Rod chamber in the middle;

[0026] 4-Oil manifold block; 41-Independent oil passage;

[0027] 5-Gear pump; 51-A1 port; 52-B port;

[0028] 6-Electrically controlled valve;

[0029] 7-Motor;

[0030] 8-Protective cover; 81-Electrical plug-in. 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] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0034] 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.

[0035] See Figures 1-3 As shown, this embodiment of the utility model provides a sleeve-type electro-hydraulic lifting device, including a horizontally arranged cylinder 1. A piston rod 2 and a multi-stage sleeve are disposed within the cylinder 1. The multi-stage sleeve includes several sleeves 3 nested sequentially from the inside out. The piston rod 2 is disposed within the innermost sleeve 3, and a first piston 21 is disposed at the right end of the piston rod 2. A second piston 31 is disposed at the right end of each sleeve 3. Specifically, both the first piston 21 and the second piston 31 are equipped with one-way valves. When the multi-stage sleeve is in a retracted state, each second connection port 33 is flush with the first connection port 12. In each pair of adjacent sleeves 3, the third connection port 34 of the outer sleeve 3 is displaced to the left of the third connection port 34 of the inner sleeve 3. In this embodiment, the multi-stage sleeve includes two nested sleeves 3.

[0036] The sleeve-type electro-hydraulic lifting device also includes an oil circuit block 4, a gear pump 5, and an electronically controlled valve 6; the right end of the cylinder 1 is an open structure, and the chamber formed between the cylinder 1 and the outermost sleeve 3 is an outer rod chamber 13; a first connecting channel 11 is provided in the side wall of the cylinder 1, and a first connecting port 12 for connecting the first connecting channel 11 is provided at the left end of the inner side wall of the cylinder 1.

[0037] The cavity formed between each two adjacent sleeves 3 is a cavity with a rod in the middle; a second connecting channel 32 is provided in the side wall of the sleeve 3, and a second connecting port 33 for connecting the second connecting channel 32 is provided at the left end of the inner side wall of the sleeve 3, and a third connecting port 34 for connecting the second connecting channel 32 is provided at the right end of the outer side wall of the sleeve 3.

[0038] The cavity formed between the piston rod 2 and the innermost sleeve 3 is a rod cavity 22 on the inside; specifically, an ear seat 23 is provided at the left end of the piston rod 2. The piston rod 2 is a hollow structure.

[0039] The oil passage block 4 is installed and sealed at the open end of the cylinder 1, and several independent oil passages 41 are provided inside the oil passage block 4; the chamber formed between the oil passage block 4 and each piston is the pressure chamber 14.

[0040] The gear pump 5 and the solenoid valve 6 are both integrated on the right side of the oil circuit block 4. The gear pump 5 includes port A1 51 and port B 52, and the solenoid valve 6 includes port P, port O, port A2 and a downcomer port.

[0041] The A1 port 51 of the gear pump 5 and the O port of the solenoid valve 6 are connected to the first connecting channel 11 via independent oil passages 41, and the B port 52 of the gear pump 5 is connected to the P port of the solenoid valve 6 via independent oil passages 41. The A2 port and the descent port of the solenoid valve 6 are connected to the pressure chamber 14. Specifically, the solenoid valve 6 also includes a slow-descent port, which is connected to the pressure chamber 14. The A2 port, the descent port, and the slow-descent port of the solenoid valve 6 are connected to the pressure chamber 14 via independent oil passages 41. In this embodiment, the solenoid valve is an intelligent solenoid directional valve (model: DKF-F100A) manufactured by Hubei Daqi Hydraulic Co., Ltd., and its corresponding Chinese patent is "An Intelligent Solenoid Hydraulic Directional Valve" (patent application number: 202320772871X).

[0042] The sleeve-type electro-hydraulic lifting device also includes a motor 7 connected to the gear pump 5. In this embodiment, the motor 6 is a commonly used 3KW 220V permanent magnet synchronous motor.

[0043] The sleeve-type electro-hydraulic lifting device also includes a protective cover 8 for covering the gear pump 5, the electric control valve 6, and the motor 7, and the protective cover 8 is provided with an electrical plug 81, which is electrically connected to the electric control valve 6 and the motor 7 respectively.

[0044] The working principle of this utility model is as follows:

[0045] 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.

[0046] When the hydraulic cylinder performs the lifting action, the hydraulic oil in the inner rod chamber flows into the innermost middle rod chamber from the second connecting channel of the adjacent sleeve; the hydraulic oil in the middle rod chamber flows into the outer rod chamber from the inside to the outside through the second connecting channel; the hydraulic oil in the outer rod chamber passes through the first connecting channel and the independent oil passage in sequence, is drawn in from port A1 of the gear pump, flows out from port B, and enters port P of the solenoid valve through the independent oil passage in the oil circuit block. By controlling the operation of the solenoid valve, the hydraulic oil reaches the pressure chamber through port A2 of the solenoid valve. Due to the different action areas, it pushes the sleeves and piston rods of each stage from the outside to the inside, causing them to extend to the left (relative to the bottom of the cylinder), thus realizing the lifting action of the cargo box.

[0047] When the electronically controlled valve reaches the stop position, the cargo box is in a stop state.

[0048] When the electronically controlled valve reaches the slow-descent position, hydraulic oil in the pressure chamber is drawn in through the slow-descent port and flows out through the O port. The hydraulic oil sequentially enters the outer rod chamber via the independent oil passage and the first connecting channel. From the outer rod chamber, the hydraulic oil flows from the outside to the middle rod chamber through the second connecting channel. Finally, the hydraulic oil in the innermost middle rod chamber flows from the second connecting channel into the inner rod chamber. The piston rod of the cylinder moves to the right, and the cargo box slowly descends.

[0049] When the electronically controlled valve reaches the lowering position, hydraulic oil in the pressure chamber is drawn in through the lowering port of the electronically controlled valve and flows out through the O port. The hydraulic oil sequentially enters the outer rod chamber through the independent oil passage and the first connecting channel. The hydraulic oil in the outer rod chamber flows into the middle rod chamber from the outside to the inside through the second connecting channel. The hydraulic oil in the innermost middle rod chamber flows into the inner rod chamber through the second connecting channel. The piston rod of the cylinder moves to the right, and the cargo box descends rapidly.

[0050] 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.

[0051] 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 sleeve-type electro-hydraulic lifting device, comprising a horizontally arranged cylinder (1), a piston rod (2) and a multi-stage sleeve are arranged inside the cylinder (1), the multi-stage sleeve comprising a plurality of sleeves (3) nested sequentially from the inside to the outside, the piston rod (2) being arranged inside the innermost sleeve (3), and a first piston (21) being arranged at the right end of the piston rod (2), and a second piston (31) being arranged at the right end of the sleeve (3); characterized in that: It also includes an oil manifold (4), a gear pump (5), and an electronically controlled valve (6); The right end of the cylinder (1) is an open structure, and the cavity formed between the cylinder (1) and the outermost sleeve (3) is an outer rod cavity (13); a first connecting channel (11) is provided in the side wall of the cylinder (1), and a first connecting port (12) for connecting the first connecting channel (11) is provided at the left end of the inner side wall of the cylinder (1). The cavity formed between each two adjacent sleeves (3) is a cavity with a rod in the middle (35); a second connecting channel (32) is provided in the side wall of the sleeve (3), and a second connecting port (33) for connecting the second connecting channel (32) is provided at the left end of the inner side wall of the sleeve (3), and a third connecting port (34) for connecting the second connecting channel (32) is provided at the right end of the outer side wall of the sleeve (3). The cavity formed between the piston rod (2) and the innermost sleeve (3) is the inner rod cavity (22). The oil passage block (4) is installed and sealed at the open end of the cylinder (1), and several independent oil passages (41) are provided inside the oil passage block (4); the chamber formed between the oil passage block (4) and each piston is a pressure chamber (14). The gear pump (5) and the electronically controlled valve (6) are both integrated on the right side of the oil circuit block (4). The gear pump (5) includes port A1 (51) and port B (52), and the electronically controlled valve (6) includes port P, port O, port A2 and a downcomer port. The A1 port (51) of the gear pump (5) and the O port of the solenoid valve (6) are connected to the first connecting channel (11) through independent oil passage (41), and the B port (52) of the gear pump (5) is connected to the P port of the solenoid valve (6) through independent oil passage (41); the A2 port and the descending oil port of the solenoid valve (6) are connected to the pressure chamber (14).

2. The telescopic electro-hydraulic lifting device according to claim 1, characterized in that: The electronically controlled valve (6) also includes a slow-descent oil port, which is connected to the pressure chamber (14).

3. A telescopic electro-hydraulic lifting device according to claim 2, characterised in that: The A2 port, the descent port and the slow descent port of the electronically controlled valve (6) are connected to the pressure chamber (14) through independent oil passages (41).

4. The telescopic electro-hydraulic lifting device according to claim 1, characterized in that: It also includes a motor (7) connected to the gear pump (5).

5. A telescopic electro-hydraulic lifting device according to claim 4, characterised in that: It also includes a protective cover (8) for covering the gear pump (5), the electric control valve (6), and the motor (7), and an electrical plug (81) is provided on the protective cover (8), which is electrically connected to the electric control valve (6) and the motor (7) respectively.

6. The sleeve-type electro-hydraulic lifting device according to claim 1, characterized in that: Both the first piston (21) and the second piston (31) are equipped with one-way valves.

7. The telescopic electro-hydraulic lifting device according to claim 1, characterized in that: The piston rod (2) is provided with an ear seat (23) at its left end.

8. The telescopic electro-hydraulic lifting device according to claim 1, characterized in that: The piston rod (2) has a hollow structure.

9. The telescopic electro-hydraulic lifting device according to claim 1, characterized in that: The multi-stage sleeve includes two nested sleeves (3).

10. The telescopic electro-hydraulic lifting device according to claim 1, characterized in that: When the multi-stage sleeve is in the contracted state, each second connection port (33) is flush with the first connection port (12), and in each pair of adjacent sleeves (3), the third connection port (34) of the outer sleeve (3) is displaced to the left side of the third connection port (34) of the inner sleeve (3).

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