A manual-electric integrated lifting arm structure for medical tower

Abstract

The application relates to the technical field of medical equipment, and provides a manual and electric integrated lifting arm structure for a medical lifting tower, which comprises a spring support, a full-thread screw, a gas spring position adjusting block, a gas spring, a welded upper arm rod, an electric push rod and a lifting structure. The gas spring and the electric push rod are arranged in parallel, the initial upward angle of the gas spring can be changed through the gas spring position adjusting block to match different loads; the electric push rod can be stretched and contracted by external force when power is cut off, manual and electric dual-mode switching is realized; mechanical limiting blocks and sensor limiting pressing pieces are arranged on the welded upper arm rod, double stroke protection is formed, and overstroke is prevented. The structure has the functions of electric precise control and manual emergency operation, and the safety and load adaptability of the medical lifting tower are improved.

Description

Technical Field

[0001] This invention relates to the field of medical equipment technology, and is a lifting arm structure for medical pendant towers, especially suitable for medical equipment suspension systems that need to accommodate both electric operation and manual emergency operation. Background Technology

[0002] Currently, medical pendant systems, commonly used in hospital operating rooms and ICUs, typically employ purely manual or purely electric lifting arm structures. However, existing solutions have the following drawbacks: The purely manual structure is laborious to operate, and frequent use places high demands on the physical strength of medical staff. Pure electric structures cannot operate normally when power is lost or the drive unit fails, lacking emergency protection and posing safety hazards. Traditional gas springs or mechanical balancing structures have poor load adaptability and are prone to imbalance when the weight of the suspended equipment changes. Due to structural limitations, the airtightness of traditional gas springs inevitably decreases after prolonged use, resulting in insufficient support.

[0003] To address the aforementioned issues, there is an urgent need for a lifting arm structure that can be precisely controlled electrically, operated manually in emergencies, and has a wide load adaptability and safe travel limit, in order to improve the safety and reliability of medical pendant systems. Summary of the Invention

[0004] Technical issues This invention provides a lifting arm structure that integrates manual and electric dual modes, with sensor-based and mechanical limit switches, solving the problems of low operational redundancy and poor load adaptability in traditional solutions.

[0005] Technical solution The core structure includes: Adjustment mechanism: The fully threaded screw (11) passes through the bracket on the spring support (10) and is locked by the top nut. The gas spring position adjustment block (12) is provided with internal thread and is screwed to the fully threaded screw (11) through the internal thread. Rotating the fully threaded screw (11) can make the gas spring position adjustment block (12) axially displace 60mm, thereby adjusting the elevation angle of the gas spring (30) to match different weight suspension loads.

[0006] Dual drive system: The upper end of the gas spring (30) is hinged to the gas spring position adjustment block (12), and the lower end is connected to the welding hinge (22) of the welded upper arm (20); the electric push rod (40) is installed in parallel with the gas spring (30), and both ends are connected to the spring support (10) and the welded upper arm (20) respectively through pins to form a rotating pair; the electric push rod (40) has no position self-locking effect after power failure, and can be passively extended and retracted by external force to complete the manual lifting operation.

[0007] Safety limit: The mechanical limit block (21) is welded to the upper and lower limit positions of the lifting trajectory of the welded upper arm (20); the sensor limit plate (60) is welded to the welded upper arm (20) to achieve electrical limit in conjunction with the upper limit sensor and the lower limit sensor, and together with the mechanical limit block, they form a double stroke protection.

[0008] Beneficial effects Dual mode: The gas spring (30) provides manual operation assistance to counteract the force generated by the load, and the electric push rod (40) realizes electric lifting; on the other hand, when the airtightness of the gas spring (30) decreases after long-term use, the holding force of the electric push rod (40) can still be used to balance the force generated by the load and extend the service life of the system.

[0009] Failure protection: The sensor limiting pressure plate (60) and the mechanical limiting block (21) are combined to block overtravel, and manual operation is still available in case of electric system failure.

[0010] Enhanced load capacity: After the gas spring (30) and load force in the system have been adjusted and balanced, an additional load of up to 10 kg can still be added during static use. At this time, the holding force of the electric push rod (40) balances the additional force generated by the increased load. Attached Figure Description

[0011] Figure 1 : This is a perspective view of the overall structure of a manual and electric integrated lifting arm structure for medical pendants according to the present invention; Figure 2 This is a rear view of the overall structure of a manual / electric integrated lifting arm structure for medical pendants according to the present invention, showing the extreme position (sensor limiting). Figure 3 This is a front view of the overall limit position (mechanical limit) of a manual and electric integrated lifting arm structure for medical pendants according to the present invention. Figure 4 This is a front view of the lower limit position (mechanical limit) of the overall structure of a manual and electric integrated lifting arm structure for medical pendants according to the present invention. Figure 5This is a schematic diagram of the electric push rod installation for a manual-electric integrated lifting arm structure for medical pendants according to the present invention. Figure 6 : This is a schematic diagram of the gas spring adjustment mechanism of a manual-electric integrated lifting arm structure for medical pendants according to the present invention; Figure 7 This is a partial schematic diagram of the sensor limiting mechanism of a manual / electric integrated lifting arm structure for medical pendants according to the present invention. Detailed Implementation

[0012] Please see Figures 1 to 7 , This invention relates to the field of medical equipment technology and provides a manual-electric integrated lifting arm structure for medical pendants. Its features include a spring support (10), a gas spring (30), an electric push rod (40), a welded upper arm (20), a mechanical limit block (21), and a lifting structure (50). The spring support (10) is connected to a fully threaded screw (11) via a top-nut structure; the fully threaded screw (11) is connected to a gas spring position adjustment block (12) via a thread; the gas spring position adjustment block (12) is connected to one end of the gas spring (30) via a hinge; the other end of the gas spring (30) is hinged to a welded hinge (22) on the welded upper arm (20); both ends of the electric push rod (40) are hinged to pins welded to the spring support (10) and the welded upper arm (20), respectively; and the lifting structure (50) is located at the end of the welded upper arm (20).

[0013] When medical equipment is suspended below the hoisting structure (50), during the installation process, the gas spring (30) is adjusted by the gas spring position adjustment block (12) threaded to the fully threaded screw (11) to adjust the elevation angle of the gas spring (30), so that the suspended equipment is in a torque balance state. Then the electric push rod (40) is installed so that the gas spring (30) and the electric push rod (40) act in parallel between the spring support (10) and the welded upper arm (20) to form a support. At this time, the extension and retraction of the electric push rod (40) can be controlled by overcoming the damping of the gas spring (30) to realize the lifting and lowering of the welded upper arm (20), thereby driving the hoisting structure (50) to lift and lower, and finally realizing the lifting and lowering of the medical equipment suspended below it.

[0014] When a power outage or a malfunction occurs in the electric system, that is, when the electric push rod (40) cannot perform electric extension and retraction, the medical equipment suspended below the hoisting structure (50) can be manually pushed and pulled to achieve the extension and retraction of the gas spring (30) and the electric push rod (40), thus realizing manual lifting and lowering.

[0015] When operated electrically, if the lifting angle of the equipment exceeds the limit, the sensor limit plate (60) welded to the upper arm (20) will preferentially trigger the upper limit sensor (61) or the lower limit sensor (62) to stop the equipment from lifting. If the sensor limit fails, the mechanical limit block (21) will further implement mechanical limit. At this time, the controller of the electric push rod (40) will trigger the dual safety mechanism of stall protection or overcurrent protection because the push rod stroke is physically blocked, so that the electric push rod (40) will automatically stop working. When operated manually, when the lifting reaches the limit position, the mechanical limit block (21) will play the role of physical limit.

Claims

1. A manual / electric integrated lifting arm structure for medical pendant systems, characterized in that... include: Spring support (10); fully threaded screw (11) connected to spring support (10) via a top nut structure; gas spring position adjustment block (12) threadedly connected to fully threaded screw (11); gas spring (30) hinged at one end to gas spring position adjustment block (12); welded upper arm (20) provided with welded hinge (22), mechanical limit block (21) and sensor limit pressure plate (60), the other end of the gas spring (30) being hinged to the welded hinge (22); electric push rod (40) with spring support (10) and welded upper arm (20) respectively hinged at both ends; hoisting structure (50) provided at the end of welded upper arm (20).

2. The lifting arm structure according to claim 1, characterized in that: The gas spring position adjustment block (12) is provided with an internal thread, and the elevation angle of the gas spring (30) can be adjusted by rotating the fully threaded screw (11).

3. The lifting arm structure according to claim 1, characterized in that: The electric push rod (40) is connected to the spring support (10) and the welded upper arm rod (20) at both ends by pins to form a rotating pair.

4. The lifting arm structure according to claim 1, characterized in that: The mechanical limit block (21) is welded to the upper and lower limit positions of the lifting trajectory of the welded upper arm (20).

5. The lifting arm structure according to claim 1, characterized in that: The sensor limiting pressure plate (60) is welded to the welded upper arm (20), and an upper limit sensor (61) and a lower limit sensor (62) are correspondingly provided.

6. The lifting arm structure according to claim 1, characterized in that: The electric push rod (40) has no position self-locking effect after power failure, and can be passively extended and retracted by external force to cooperate with manual lifting and lowering operations.

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