Electric wheel stretcher lifting structure and electric wheel stretcher

Abstract

The utility model provides an electric wheel stretcher lifting structure and an electric wheel stretcher, and relates to the technical field of electric wheel stretchers. The electric stretcher vehicle lifting structure comprises a folding frame used for stretcher installation, a hydraulic cylinder, a motor, an oil pump, a hydraulic oil barrel and an oil way plate, the hydraulic oil barrel is connected with the oil way plate in a sealed mode, the oil pumping end of the oil pump is communicated with the hydraulic oil barrel, and the oil discharging end of the oil pump is communicated with an oil cavity of the hydraulic cylinder through the oil way plate. The motor is in driving connection with the oil pump so that the folding frame can be unfolded through the hydraulic cylinder. In the descending process of the stretcher, the oil pump can extend the cylinder rod of the hydraulic cylinder when the motor is in a non-starting state so as to reduce the use of the motor in the descending process of the stretcher, so that the energy consumption of the motor is reduced, the energy consumption of the electric wheel stretcher is further reduced, and the endurance of the electric wheel stretcher is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric stretcher vehicles, in particular to an electric stretcher vehicle lifting structure and an electric stretcher vehicle. Background Art

[0002] At present, in electric stretcher trolleys, the lifting and lowering of the stretcher is usually achieved by a motor-driven foldable frame, that is, the motor drives the frame to unfold in the forward direction to achieve the lifting of the stretcher, and the motor drives the frame to fold in the reverse direction to achieve the lowering of the stretcher. This increases the power consumption of the electric stretcher trolley, thereby reducing the battery life of the electric stretcher trolley. Utility Model Content

[0003] The problem solved by the utility model is how to reduce the energy consumption of an electric stretcher.

[0004] To solve the above problems, on the one hand, the utility model provides an electric stretcher trolley lifting structure, including a hydraulic cylinder, a motor, an oil pump, a hydraulic oil barrel and an oil circuit board, the hydraulic cylinder is used to be installed on the folding frame of the electric stretcher trolley, the hydraulic cylinder includes an oil supply oil chamber and an oil return oil chamber, the hydraulic oil barrel is sealed and connected to the oil circuit board, the oil discharge end of the oil pump is connected to the hydraulic oil barrel, the oil suction end of the oil pump is connected to the oil supply oil chamber through the oil circuit board, the oil return oil chamber is connected to the hydraulic oil barrel through the oil circuit board, the motor is drivingly connected to the oil pump, and the hydraulic oil in the oil supply oil chamber is pumped back into the hydraulic oil barrel through the oil pump, and the folding of the folding frame is achieved through the load of the stretcher.

[0005] Optionally, the electric stretcher vehicle lifting structure includes a pressure sensor, which is communicatively connected to the motor and fixed to the oil circuit board, and is used to detect the oil circuit pressure in the oil circuit board.

[0006] Optionally, the electric stretcher vehicle lifting structure further includes an oil supply pipe and an oil return pipe, and the oil supply pipe and the oil return pipe are respectively connected between the hydraulic cylinder and the oil circuit board.

[0007] Optionally, the electric stretcher vehicle lifting structure also includes a forward solenoid valve and a reverse solenoid valve respectively connected to the motor for communication, the forward solenoid valve realizing communication between the oil supply pipe and the oil circuit board, and the reverse solenoid valve realizing communication between the oil return pipe and the oil circuit board.

[0008] Optionally, the electric stretcher trolley lifting structure also includes the folding frame of the electric stretcher trolley, the folding frame includes a connecting rod and a telescopic rod that are crossed and relatively rotatably connected, and a mounting seat, the mounting seat is rotatably connected to the connecting rod of the folding frame, and a groove-like structure is provided on the mounting seat, and the groove-like structure is clamped with the cylinder body of the hydraulic cylinder.

[0009] Optionally, the electric stretcher vehicle lifting structure further comprises a connecting seat, which is rotatably connected to the telescopic rod of the folding frame, and two parallel clamping plates are arranged on the connecting seat, and the cylinder rod of the hydraulic cylinder is connected between the two clamping plates.

[0010] Optionally, the installation position of the hydraulic cylinder is located below the installation position of the hydraulic oil barrel.

[0011] Optionally, the electric stretcher vehicle lifting structure further includes an oil sealing structure, and the oil sealing structure is sealingly installed between the oil supply pipe and the hydraulic cylinder.

[0012] Optionally, the electric stretcher trolley lifting structure further includes a buffer detection structure, which is communicatively connected with the motor and is used to detect the folding and lifting height of the folding frame.

[0013] The jack is then connected to the hydraulic cylinder by the hydraulic pump, and the hydraulic cylinder is automatically retracted when the jack is in operation.

[0014] On the other hand, the utility model also provides an electric stretcher trolley, comprising the electric stretcher trolley lifting structure as described above.

[0015] The advantages of the electric stretcher and the lifting structure of the electric stretcher over the prior art are the same and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the lifting structure of the electric stretcher in the embodiment of the utility model;

[0017] Figure 2 It is an assembly diagram of the oil circuit board, motor, hydraulic oil barrel and hydraulic cylinder in the embodiment of the utility model.

[0018] Description of reference numerals:

[0019] 1-Hydraulic cylinder; 2-Fixed frame; 3-Telescopic frame; 31-Fixed frame; 32-Movable frame; 4-Folding bracket; 41-Connecting rod; 42-Telescopic rod; 5-Motor; 6-Auxiliary support rod; 7-Hydraulic oil drum; 8-Oil circuit board; 9-Pressure sensor; 10-Oil supply pipe; 11-Oil return pipe; 12-Forward solenoid valve; 13-Reverse solenoid valve; 14-Mounting seat; 15-Connecting seat; 151-Clamp. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] In the accompanying drawings, the Z axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis (that is, the direction of the arrow of the Z axis) represents the top, and the negative direction of the Z axis (that is, the direction opposite to the positive direction of the Z axis) represents the bottom; the X axis in the accompanying drawings represents the horizontal position, and the positive direction of the X axis (that is, the direction of the arrow of the X axis) represents the right side, and the negative direction of the X axis (that is, the direction opposite to the positive direction of the X axis) represents the left side; the Y axis in the accompanying drawings represents the front and back position, and the positive direction of the Y axis (that is, the direction of the arrow of the Y axis) represents the front side, and the negative direction of the Y axis (that is, the direction opposite to the positive direction of the Y axis) represents the back side. It should also be noted that the aforementioned Z axis, X axis and Y axis are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0023] Combination Figure 1 and Figure 2 As shown, the utility model provides an electric stretcher trolley lifting structure, including a hydraulic cylinder 1, a motor 5, an oil pump, a hydraulic oil barrel 7 and an oil circuit board 8. The hydraulic cylinder 1 is used to be installed on the folding frame of the electric stretcher trolley. The hydraulic cylinder 1 includes an oil supply oil chamber and an oil return oil chamber. The hydraulic oil barrel 7 is sealed and connected to the oil circuit board 8. The oil discharge end of the oil pump is connected to the hydraulic oil barrel 7. The oil suction end of the oil pump is connected to the oil supply oil chamber through the oil circuit board 8. The oil return oil chamber is connected to the hydraulic oil barrel 7 through the oil circuit board 8. The motor 5 is connected to the oil pump drive, and the hydraulic oil in the oil supply oil chamber is pumped back into the hydraulic oil barrel 7 through the oil pump, and the folding of the folding frame is realized by the load of the stretcher.

[0024] Specifically, the folding frame includes a parallel fixed frame 2 and a telescopic frame 3, and a folding bracket 4 located between the fixed frame 2 and the telescopic frame 3, the fixed frame 2 is used to connect with the stretcher; the telescopic frame 3 includes a relatively sliding fixed frame 31 and a movable frame 32, the folding bracket 4 includes a crossing and relatively rotating connecting rod 41 and a telescopic rod 42, the fixed end of the telescopic rod 42 is rotatably connected to the fixed frame 2, and the movable end of the telescopic rod 42 is rotatably connected to the movable frame 32; the two ends of the connecting rod 41 are respectively rotatably connected between the fixed frame 2 and the fixed frame 31; the cylinder body of the hydraulic cylinder 1 is rotatably connected to the fixed end of the telescopic rod 42, and the cylinder rod of the hydraulic cylinder 1 is hinged to the movable frame 32 and is drivingly connected to the movable frame 32; the oil circuit board 3 refers to a structure with a hydraulic oil pipeline integrated inside, which is a common hydraulic structure. The hydraulic cylinder 1 may be a piston type hydraulic cylinder. In the direction of piston movement, an oil supply chamber and an oil return chamber are formed between the piston and the cylinder body. The oil supply chamber and the oil return chamber are located on both sides of the piston movement direction. The volume of the oil supply chamber is greater than the volume of the oil return chamber to achieve the extension of the cylinder rod. The volume of the oil return chamber is greater than the volume of the oil supply chamber to achieve the retraction of the cylinder rod. The hydraulic oil barrel 7 is sealed and connected to the oil circuit board 8. The oil pump may be a gear oil pump. The oil pumping end of the oil pump is connected to the hydraulic oil barrel 7. The oil discharge end of the oil pump is connected to the oil supply chamber of the hydraulic cylinder 1 through the oil circuit board 8. The oil return chamber of the hydraulic cylinder 1 is connected to the oil circuit board 8 through an oil pipe, and the oil circuit board 8 is connected to the hydraulic oil barrel 7 through an oil pipe. The motor 5 is connected to the oil pump drive.

[0025] The lifting process is as follows: the motor 5 drives the oil pump to rotate, and the oil pump draws the hydraulic oil in the oil supply chamber of the hydraulic cylinder 1 through the oil pipe and the hydraulic oil pipeline inside the oil circuit board 8 back to the hydraulic oil barrel 7 for storage, so that the volume of the return oil chamber is larger than the volume of the oil supply chamber, thereby realizing the active retraction of the cylinder rod. During the retraction of the cylinder rod, the cylinder rod drives the movable frame 32 to slide toward the fixed frame 31 to shorten the length of the telescopic frame 3. The angle between the movable frame 32 and the telescopic rod 42 gradually increases, and the angle between the fixed frame 31 and the connecting rod 41 gradually increases, thereby realizing the unfolding of the folding bracket 4, so that the fixed frame 2 overcomes the gravity load of the stretcher to lift the stretcher, thereby realizing the lifting of the stretcher.

[0026] The lowering process is as follows: turn off the motor 5, and the fixed frame 2 applies a downward force to the connecting rod 41 and the telescopic rod 42 at the rotational connection points with the fixed frame 2 under the action of the gravity load of the stretcher. This force gradually reduces the angle between the connecting rod 41 and the fixed frame 31, and the angle between the telescopic rod 42 and the fixed frame 31 gradually reduces, so that the telescopic rod 42 drives the movable frame 32 to slide away from the fixed frame 31, so that the cylinder rod is passively pulled out of the cylinder body, and the volume of the return oil chamber gradually decreases, so that the hydraulic oil flows from the return oil chamber through the oil circuit board 8 back to the hydraulic oil barrel 7, so that the liquid pressure at the oil pump discharge end is greater than the liquid pressure at the oil pump suction end, so that the oil pump rotates, the volume of the oil supply chamber increases, and the cylinder rod is extended, so that the hydraulic oil stored in the hydraulic oil barrel 7 is passively supplied to the oil supply chamber, so as to realize the lowering of the fixed frame 2 and the lowering of the stretcher.

[0027] Therefore, in this embodiment, the oil pumping end of the oil pump is connected to the oil supply chamber of the hydraulic cylinder 1 through the oil circuit board 8, and the oil discharge end of the oil pump is connected to the hydraulic oil barrel 7. The oil pump, the hydraulic oil barrel 7, and the oil circuit board 8 constitute an oil pumping oil circuit, and then the motor 5 drives the oil pump to operate to realize the active retraction of the hydraulic cylinder 1, realize the unfolding of the folding frame, and thus realize the lifting of the stretcher, and then the return oil chamber of the hydraulic cylinder 1 is connected to the hydraulic oil barrel 7 through the oil circuit board 8, and the cylinder rod of the hydraulic cylinder 1 can fold the folding frame through the load of the stretcher to realize the passive extension of the cylinder rod, so that the oil pump uses the hydraulic pressure to make the hydraulic pressure in the hydraulic oil barrel 7 supplied to the oil supply chamber of the hydraulic cylinder 1 through the oil circuit board 8. In this way, during the descent of the stretcher, the oil pump can realize the extension of the cylinder rod of the hydraulic cylinder 1 when the motor 5 is in an inactive state, so as to reduce the use of the motor 5 during the descent of the stretcher, thereby reducing the energy consumption of the motor 5, and then reducing the energy consumption of the electric stretcher, so as to extend the endurance of the electric stretcher.

[0028] Optionally, combined Figure 1 As shown, the folding frame may further include a folding support rod 6 , both ends of which are respectively hinged to the movable frame 32 and the fixed end of the telescopic rod 4 to improve the connection strength between the telescopic rod 4 and the movable frame 32 .

[0029] Optionally, combined Figure 1 As shown, the lifting structure of the electric stretcher includes a pressure sensor 9, which is connected to the motor 5 and fixed to the oil circuit board 8, and is used to detect the oil circuit pressure in the oil circuit board 8. In this way, the pressure sensor 9 for detecting the oil circuit pressure in the oil circuit board 8 is fixed to the oil circuit board 8, which can realize the feedback of the hydraulic oil pressure, and through the communication connection with the motor 5, the feedback result can be converted into a control signal of the motor 5, so as to adjust the output power of the motor 5 in real time.

[0030] Optionally, combined Figure 1As shown, the electric stretcher vehicle lifting structure further includes an oil supply pipe 10 and an oil return pipe 11, and the oil supply pipe 10 and the oil return pipe 11 are respectively connected between the hydraulic cylinder 1 and the oil circuit board 8.

[0031] Specifically, an oil supply pipe and an oil return pipe are processed inside the oil circuit plate 8. The oil supply pipe 10 is connected between the oil supply pipe inside the oil circuit plate 8 and the oil supply chamber of the hydraulic cylinder 1, and the oil return pipe 11 is connected between the oil return pipe inside the oil circuit plate 8 and the oil return chamber of the hydraulic cylinder 1.

[0032] In this way, the oil supply pipe 10 and the oil return pipe 11 allow the oil supply and oil return to form two relatively independent oil passages, that is, the oil supply and oil return are relatively independent, thus improving the oil supply or oil return efficiency.

[0033] Optionally, combined Figure 1 and Figure 2 As shown, the electric stretcher vehicle lifting structure also includes a forward solenoid valve 12 and a reverse solenoid valve 13 which are respectively connected to the motor 5 for communication. The forward solenoid valve 12 realizes the connection between the oil supply pipe 10 and the oil circuit board 8, and the reverse solenoid valve 13 realizes the connection between the oil return pipe 11 and the oil circuit board 8.

[0034] Specifically, the forward solenoid valve 12 is connected to the oil circuit board 8 by threads, and the valve body of the forward solenoid valve 12 is located between the oil supply pipe 10 and the oil supply pipeline of the oil circuit board 8. The reverse solenoid valve 13 is connected to the oil circuit board 8 by threads, and the valve body of the reverse solenoid valve 13 is located between the return oil pipe 11 and the return oil pipeline of the oil circuit board 8. When the stretcher is raised, the forward solenoid valve 12 is opened, and the reverse solenoid valve 13 is closed, so as to achieve the connection between the supply oil pipe 10 and the oil supply pipeline of the oil circuit board 8, thereby realizing the withdrawal of hydraulic oil. When the stretcher is lowered, the reverse solenoid valve 13 is opened, and the forward solenoid valve 12 is closed, so as to achieve the connection between the return oil pipe 11 and the return oil pipeline of the oil circuit board 8, thereby realizing the supply of hydraulic oil. In this way, during the stretcher lifting process, the forward rotation solenoid valve 12 and the reverse rotation solenoid valve 13 can respectively realize the forward rotation or reverse rotation of the motor 5. In this way, the stretcher can be raised by the forward rotation solenoid valve 12, and when the stretcher needs to be lowered quickly, the reverse rotation solenoid valve 13 can be used to cooperate with the load of the stretcher to achieve the stretcher. Rapid descent, thereby improving the flexibility of the electric stretcher vehicle.

[0035] Optionally, combined Figure 1 As shown, the lifting structure of the electric stretcher trolley also includes a folding frame of the electric stretcher trolley, and the folding frame includes a connecting rod 41 and a telescopic rod 42 that are crossed and relatively rotatably connected, and a mounting seat 14. The mounting seat 14 is rotatably connected to the connecting rod 41 of the folding frame, and a groove structure is provided on the mounting seat 14, which is clamped with the cylinder body of the hydraulic cylinder 1.

[0036] Specifically, the mounting seat 14 is rotatably connected to the fixed end of the telescopic rod 42 through a pin shaft, and a groove-shaped structure is provided on the mounting seat 14, and the groove-shaped structure is engaged with the cylinder body of the hydraulic cylinder 1, and the cylinder rod of the hydraulic cylinder 1 is hinged to the movable frame 32. In this way, the mounting seat 14 is rotatably connected to the folding frame, and the groove-shaped structure on the mounting seat 14 is engaged with the cylinder body of the hydraulic cylinder 1, so that the mounting seat 10 provides an installation position for connecting the hydraulic cylinder 2 with the frame 30, and the position limiting of the cylinder body of the hydraulic cylinder 2 is achieved by setting the groove-shaped structure, so as to improve the connection stability between the hydraulic cylinder 2 and the mounting seat 10, and further improve the telescopic stability of the cylinder rod hinged at the bottom of the hydraulic cylinder 2 and the frame 30.

[0037] Optionally, combined Figure 1 As shown, the electric stretcher lifting structure also includes a connecting seat 15, which is rotatably connected to the telescopic rod 42 of the folding frame. Two parallel clamping plates 151 are arranged on the connecting seat 15, and the cylinder rod of the hydraulic cylinder 1 is connected between the two clamping plates 151.

[0038] Specifically, the connecting seat 15 is sleeved on the middle part of the movable frame 32 and is rotatably connected to the movable frame 32. In the rotation direction of the connecting seat 15, two parallel clamping plates 151 are arranged on the connecting seat 15, and the cylinder rod of the hydraulic cylinder 1 is connected between the two clamping plates 151 through a pin shaft.

[0039] In this way, the cylinder rod of the hydraulic cylinder 1 is connected between two clamping plates 151 distributed in parallel along the rotation direction of the connecting seat 15. The two clamping plates 151 limit the rotation of the cylinder rod of the hydraulic cylinder 1 relative to the connecting seat 15, so as to limit the cylinder rod of the hydraulic cylinder 1 in the rotation direction of the connecting seat 15. In this way, the stability of the connection between the cylinder rod of the hydraulic cylinder 1 and the connecting seat 15 can be improved.

[0040] Optionally, combined Figure 1 and Figure 2 As shown, the installation position of the hydraulic cylinder 1 is located below the installation position of the hydraulic oil barrel 7. In this way, during the oil supply, the hydraulic oil in the hydraulic oil barrel 7 can assist the oil pump to quickly supply the hydraulic oil through the action of gravity, thereby improving the oil supply efficiency.

[0041] Optionally, the lifting structure of the electric stretcher vehicle further includes an oil sealing structure, which is sealingly installed between the oil supply pipe 10 and the hydraulic cylinder 1, and / or the oil sealing structure is sealingly installed between the oil return pipe 11 and the hydraulic cylinder 1. Specifically, the oil sealing structure is a sealing valve or the like, which is installed between the oil supply pipe 10 and the hydraulic cylinder 1, and / or the oil sealing structure is sealingly installed between the oil return pipe 11 and the hydraulic cylinder 1. In this way, the sealing performance of the hydraulic oil between the oil supply pipe 10 and the hydraulic cylinder 1 can be improved by the oil sealing structure.

[0042] Optionally, combined Figure 2As shown, the electric stretcher vehicle lifting structure further includes a buffer detection structure, which is communicatively connected with the motor 5 and is used to detect the folding and lifting height of the folding frame.

[0043] Specifically, if the output power of the motor 5 is constant during the process of the folding frame being raised to the maximum height, it is easy to cause the power consumption of the motor 5 to increase relatively. Based on this, the buffer detection structure can be a distance sensor, the distance sensor is installed on the fixed frame 2, and is used to measure the vertical distance between the fixed frame 2 and the telescopic frame 3. The vertical distance can be slightly smaller than the maximum vertical height between the fixed frame 2 and the telescopic frame 3. The distance sensor is connected to the motor 5 for communication. When the distance sensor is triggered, it indicates that the fixed frame 2 will reach the maximum height. At this time, the output power of the motor 5 can be reduced to reduce the energy consumption of the motor 5, so that the fixed frame 2 can be raised to the maximum height at a relatively slow speed. In this way, not only can the energy consumption of the motor 5 be reduced to extend the endurance of the electric stretcher, but also the stability of the fixed frame 2 when it is raised to the maximum height can be improved.

[0044] Another embodiment of the utility model further provides an electric stretcher, comprising the above electric stretcher lifting structure.

[0045] The advantages of the electric stretcher and the lifting structure of the electric stretcher over the prior art are the same and will not be described in detail here.

[0046] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. An electric stretcher lifting structure, characterized in that: The invention comprises a hydraulic cylinder (1), a motor (5), an oil pump, a hydraulic oil barrel (7) and an oil circuit board (8); the hydraulic cylinder (1) is used to be installed on the folding frame of the electric stretcher; the hydraulic cylinder (1) comprises an oil supply chamber and an oil return chamber; the hydraulic oil barrel (7) is sealedly connected to the oil circuit board (8); the oil discharge end of the oil pump is connected to the hydraulic oil barrel (7); the oil suction end of the oil pump is connected to the oil supply chamber through the oil circuit board (8); the oil return chamber is connected to the hydraulic oil barrel (7) through the oil circuit board (8); the motor (5) is connected to the oil pump in a driving manner, and the hydraulic oil in the oil supply chamber is pumped back into the hydraulic oil barrel (7) through the oil pump, and the folding of the folding frame is achieved by the load of the stretcher.

2. The electric stretcher lifting structure according to claim 1, characterized in that: It also includes a pressure sensor (9), which is communicatively connected to the motor (5) and fixed to the oil circuit board (8), and is used to detect the oil circuit pressure in the oil circuit board (8).

3. The electric stretcher lifting structure according to claim 1, characterized in that: It also includes an oil supply pipe (10) and an oil return pipe (11), wherein the oil supply pipe (10) and the oil return pipe (11) are respectively connected between the hydraulic cylinder (1) and the oil circuit board (8).

4. The electric stretcher lifting structure according to claim 3, characterized in that: It also includes a forward solenoid valve (12) and a reverse solenoid valve (13) respectively connected to the motor (5) for communication, wherein the forward solenoid valve (12) enables communication between the oil supply pipe (10) and the oil circuit board (8), and the reverse solenoid valve (13) enables communication between the oil return pipe (11) and the oil circuit board (8).

5. The electric stretcher lifting structure according to claim 1, characterized in that: The electric stretcher also comprises the folding frame of the electric stretcher, the folding frame comprising a connecting rod (41) and a telescopic rod (42) which are cross-connected and relatively rotatably connected, and a mounting seat (14), the mounting seat (14) being rotatably connected to the connecting rod (41) of the folding frame, the mounting seat (14) being provided with a groove-shaped structure, and the groove-shaped structure being clamped with the cylinder body of the hydraulic cylinder (1).

6. The electric stretcher lifting structure according to claim 5, characterized in that: It also comprises a connecting seat (15), the connecting seat (15) being rotatably connected to the telescopic rod (42) of the folding frame, the connecting seat (15) being provided with two parallel clamping plates (151), and the cylinder rod of the hydraulic cylinder (1) being connected between the two clamping plates (151).

7. The electric stretcher lifting structure according to claim 1, characterized in that: The installation position of the hydraulic cylinder (1) is located below the installation position of the hydraulic oil barrel (7).

8. The electric stretcher lifting structure according to claim 3, characterized in that: It also comprises an oil sealing structure, which is sealingly installed between the oil supply pipe (10) and the hydraulic cylinder (1).

9. The electric stretcher lifting structure according to claim 1, characterized in that: It also comprises a buffer detection structure, which is in communication connection with the motor (5) and is used to detect the folding and lifting height of the folding frame.

10. An electric stretcher, characterized in that: It comprises the electric stretcher lifting structure as described in any one of claims 1-9.

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