Power unit for medical stretcher

Abstract

The utility model discloses a power unit for a medical stretcher, which comprises a valve block assembly respectively connected with a double-acting hydraulic oil cylinder, a brushless motor, a bidirectional hydraulic gear pump, an oil storage bag and an oil tank. The brushless motor is connected with the bidirectional hydraulic gear pump through a coupler; the valve block assembly comprises a one-way valve, an overflow valve, a balance valve, a pull wire plate, a pull wire supporting plate and a manual unloading valve, and the pull wire plate, the pull wire supporting plate and the manual unloading valve form a manual emergency descending mechanism of the medical stretcher. The height can be automatically adjusted, operation is easy, and safety and stability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of power units, and in particular to a power unit for a medical stretcher. Background Technology

[0002] Medical stretchers are indispensable emergency and transport equipment in medical institutions, primarily used to move patients from one location to another within a medical facility or at an emergency scene. With the continuous advancement of medical technology and the diversification of medical needs, the requirements for medical stretchers are also increasing. Traditional medical stretchers mostly use manual adjustment, which suffers from difficulties in adjustment and poor stability, failing to meet the needs of modern medical rescue.

[0003] Therefore, it is necessary to develop new power units for medical stretchers to overcome problems such as difficulty in adjustment and poor stability, and to meet the needs of use. Utility Model Content

[0004] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides a power unit for medical stretchers that can automatically adjust the height, is easy to operate, and is safe and stable.

[0005] Technical Solution: This utility model discloses a power unit for a medical stretcher, characterized in that it includes a valve block assembly, which is connected to a double-acting hydraulic cylinder, a brushless motor, a bidirectional hydraulic gear pump, an oil reservoir, and an oil tank respectively; the brushless motor and the bidirectional hydraulic gear pump are connected via a coupling; the valve block assembly includes a check valve, an overflow valve, a balance valve, a pull cable plate, a pull cable support plate, and a manual unloading valve, which together form a manual emergency lowering mechanism for the medical stretcher.

[0006] The double-acting hydraulic cylinder and the valve block assembly are fixed together by screws.

[0007] The brushless motor and the valve block assembly are fixed together by screws.

[0008] The oil reservoir, oil tank, and valve block assembly are connected and fixed by screws.

[0009] The bidirectional hydraulic gear pump and the valve block assembly are fixed together by screws.

[0010] The double-acting hydraulic cylinder and valve block assembly constitute the actuator.

[0011] The brushless motor shaft and the bidirectional hydraulic gear pump are connected by a coupling.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention integrates a brushless motor, valve block assembly, double-acting hydraulic cylinder, bidirectional hydraulic gear pump, oil reservoir and oil tank into one unit to form a hydraulic actuator. It has a small size, realizes the functional requirements within a limited space, can automatically adjust the height, is easy to operate and is safe and stable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0015] Figure 3 This is a schematic diagram of the emergency manual lowering mechanism of this utility model;

[0016] Figure 4 This is a schematic diagram of the hydraulic principle of this utility model;

[0017] In the diagram, 1 is a double-acting hydraulic cylinder; 2 is a one-way valve; 3 is a relief valve; 4 is a brushless motor; 5 is a balance valve; 6 is a valve block assembly; 7 is a two-way hydraulic gear pump; 8 is an oil reservoir; 9 is an oil tank; 10 is a cable pull plate; 11 is a cable pull support plate; and 12 is a manual unloading valve. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] The power unit for a medical stretcher of this utility model includes a valve block assembly 6, which is connected to a double-acting hydraulic cylinder 1, a brushless motor 4, a bidirectional hydraulic gear pump 7, an oil reservoir 8, and an oil tank 9 respectively; the brushless motor 4 and the bidirectional hydraulic gear pump 7 are connected by a coupling; the valve block assembly 6 includes a one-way valve 2, an overflow valve 3, a balance valve 5, a pull cable plate 10, a pull cable support plate 11, and a manual unloading valve 12, which together form a manual emergency lowering mechanism for the medical stretcher.

[0020] The double-acting hydraulic cylinder 1 and valve block assembly 6 of this invention are fixedly connected by screws. The brushless motor 4 and valve block assembly 6 are also fixedly connected by screws. The oil reservoir 8 and oil tank 9 are fixedly connected by screws to the valve block assembly 6. The bidirectional hydraulic gear pump 7 is fixedly connected by screws to the valve block assembly 6. The double-acting hydraulic cylinder 1 and valve block assembly 6 form the actuator. The actuator uses the oil output from the bidirectional hydraulic gear pump 7 driven by the brushless motor 4 to control the extension and retraction of the double-acting hydraulic cylinder 1, thereby controlling the raising and lowering of the stretcher. The shaft of the brushless motor 4 and the bidirectional hydraulic gear pump 7 are connected by a coupling.

[0021] In use, the brushless motor 4 starts and drives the bidirectional hydraulic gear pump 7 via a coupling to output oil to the valve block assembly 6. The oil then passes through the check valve 2 and enters the rodless chamber of the double-acting hydraulic cylinder 1. The oil input increases the volume of the rodless chamber, pushing the piston rod of the double-acting hydraulic cylinder 1 to extend. The extension of the piston rod pushes the stretcher structure upward. Correspondingly, the brushless motor 4 is controlled to start in the reverse direction, causing oil to enter the rod chamber of the double-acting hydraulic cylinder 1. The oil input increases the volume of the rod chamber, pushing the piston rod of the double-acting hydraulic cylinder 1 to retract. The retraction of the piston rod pushes the stretcher structure downward.

[0022] This invention integrates key components such as a hydraulic cylinder, motor, oil tank, valve block assembly, and gear pump, providing power support for height adjustment of the medical stretcher. Driven by the motor, the stretcher height can be easily adjusted to suit different needs; simultaneously, the hydraulic cylinder structure ensures the stability and safety of the stretcher during lifting and lowering. Furthermore, the closed-loop system design allows the actuator to provide continuous and stable hydraulic power, further enhancing the stretcher's usability. This actuator is compact, easy to install and maintain, and offers significant convenience for the use of medical stretchers.

Claims

1. A power unit for a medical stretcher, characterized in that: The system includes a valve block assembly (6), which is connected to a double-acting hydraulic cylinder (1), a brushless motor (4), a bidirectional hydraulic gear pump (7), an oil reservoir (8), and an oil tank (9). The brushless motor (4) and the bidirectional hydraulic gear pump (7) are connected by a coupling. The valve block assembly (6) includes a check valve (2), an overflow valve (3), a balance valve (5), a pull cable plate (10), a pull cable support plate (11), and a manual unloading valve (12). The pull cable plate (10), the pull cable support plate (11), and the manual unloading valve (12) together form a manual emergency lowering mechanism for the medical stretcher.

2. The power unit for a medical stretcher according to claim 1, characterized in that: The double-acting hydraulic cylinder (1) and the valve block assembly (6) are fixed together by screws.

3. The power unit for a medical stretcher according to claim 1, characterized in that: The brushless motor (4) and the valve block assembly (6) are fixed together by screws.

4. The power unit for a medical stretcher according to claim 1, characterized in that: The oil storage bladder (8), oil tank (9) and valve block assembly (6) are fixed together by screws.

5. The power unit for a medical stretcher according to claim 1, characterized in that: The bidirectional hydraulic gear pump (7) and the valve block assembly (6) are fixed together by screws.

6. The power unit for a medical stretcher according to claim 1, characterized in that: The double-acting hydraulic cylinder (1) and the valve block assembly (6) together form the actuator.

7. The power unit for a medical stretcher according to claim 1, characterized in that: The shaft of the brushless motor (4) and the bidirectional hydraulic gear pump (7) are connected by a coupling.

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