Operating bed stand column lifting mechanism

Abstract

The utility model belongs to the technical field of medical devices, and particularly relates to an operating bed stand column lifting mechanism. The stand column lifting mechanism comprises a base, a lower stand column, a middle stand column, an upper stand column and a two-stage hydraulic cylinder. The lower stand column is fixed to the center of the base, the middle stand column is arranged on the inner side of the lower stand column, and the upper stand column sleeves the middle stand column. A lower vertical guide rail is arranged on one inner side face of the lower stand column, a lower sliding block is arranged on the lower vertical guide rail, a lower limiting plate is arranged at the top end of the lower vertical guide rail, and the lower sliding block is fixedly connected with the middle stand column. An upper vertical guide rail is arranged on one inner side face of the upper stand column, an upper sliding block is arranged on the upper vertical guide rail, an upper limiting plate is arranged at the upper end of the upper vertical guide rail, and the upper sliding block is fixedly connected with the middle stand column. The two-stage hydraulic cylinder is fixed to the middle stand column, an upper push rod of the two-stage hydraulic cylinder is fixedly connected with the upper stand column, and a lower push rod of the two-stage hydraulic cylinder is fixedly connected with the base. The mechanism can ensure that the lifting process is stable, the structure is stable, and no shaking phenomenon exists.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically a lifting mechanism for the uprights of an operating table. Background Technology

[0002] Electric operating tables are core equipment in modern operating rooms, requiring adjustments to surgical positions in various scenarios (such as height, tilt, and the Trendlenberg position). Their stability, precision, and reliability directly impact surgical safety. The column lifting structure, as a core supporting component, bears the functions of lifting and lowering the table and handling loads, demanding extremely high performance.

[0003] Existing multi-section operating tables are prone to swaying when fully extended (especially under lateral force), affecting surgical precision. Traditional guide structures experience increased clearance after wear, leading to shaking during lifting. Electric push rods are prone to thread deformation or motor stalling under overload. Chinese utility model patent CN219423213U discloses an electric operating table lifting device, including a lower column, a middle column, an upper column, and several spacing adjustment modules. The spacing adjustment modules consist of elastic bushings and needle roller bearings. The middle column and lower column are connected by these modules. Adjusting the bolts on the middle column causes elastic deformation of the elastic bushings, pushing the needle roller bearings closer to or further away from the lower column, achieving stable lifting of the lower column. However, this patented device has a top-heavy structure, resulting in instability during lifting and requiring time and effort for adjustment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and to propose a lifting mechanism for the operating table column. This mechanism ensures a smooth lifting process, structural stability, and no shaking.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An operating table column lifting mechanism, the column lifting mechanism comprising a base, a lower column, a middle column, an upper column, and a two-stage hydraulic cylinder;

[0007] The lower column is fixed to the base, the middle column is located inside the lower column, and the upper column is sleeved on the middle column; a lower vertical guide rail is provided on one inner side of the lower column, a lower slider is provided on the lower vertical guide rail, a lower limit plate is provided at the top of the lower vertical guide rail, and the lower slider is fixedly connected to the middle column; an upper vertical guide rail is provided on one inner side of the upper column, an upper slider is provided on the upper vertical guide rail, an upper limit plate is provided at the upper end of the upper vertical guide rail, and the upper slider is fixedly connected to the middle column.

[0008] The dual-stage hydraulic cylinder is fixed on the central column, with the upper push rod of the dual-stage hydraulic cylinder fixedly connected to the upper column and the lower push rod of the dual-stage hydraulic cylinder fixedly connected to the base.

[0009] Preferably, the lower slider and the upper slider are fixedly connected to the opposite sides of the central column.

[0010] Preferably, the dual-stage hydraulic cylinder comprises two identical hydraulic cylinders connected in parallel, with the push rods of the two hydraulic cylinders extending in opposite directions.

[0011] Preferably, a push rod fixing plate is provided at the top of the upper column, and the upper push rod is fixedly connected to the push rod fixing plate.

[0012] Preferably, the operating table column lifting mechanism further includes an oil pipe lifting structure, which includes a cable chain, a cable chain cover, and a cable chain guide post. The cable chain cover is disposed on the outer side of the upper column, the cable chain is disposed inside the cable chain cover, one end of the cable chain is fixed to the middle column, and a cable chain guide post is disposed above the part of the cable chain that exits the cable chain cover. The cable chain guide post plays a role in pressing down and guiding the cable chain when the upper column descends, and there is no contact between the cable chain guide post and the cable chain when the upper column rises.

[0013] Preferably, the operating table column lifting mechanism further includes an electric wire lifting structure, which includes a pull plate and a winding reel; the pull plate is fixed to the outside of the upper column, and the winding reel is fixed to the base, with the pull plate and winding reel corresponding vertically.

[0014] Preferably, the upper column is equipped with a pull-wire sensor, and the bottom of the lower column is equipped with a sensor probe that matches the pull-wire sensor.

[0015] This invention connects sliders to both sides of the central column, and installs guide rails on the upper and lower columns. The column lifting process is achieved through rolling friction, resulting in a small contact area and low friction force. Moreover, the guide rail sliders are widely used, highly reliable, and can provide very precise linear motion, reducing vibration during operation and improving the overall stability of the movement.

[0016] This utility model operates smoothly during the lifting process, can lower the minimum height of the operating table, and is equipped with a pull-wire sensor to detect and provide feedback on the lifting distance, ensuring precise lifting distance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the column lifting mechanism of this utility model in its raised state.

[0018] Figure 2 This is a schematic diagram of the internal structure of the column lifting mechanism of this utility model;

[0019] Figure 3 yes Figure 2 Enlarged view of part A in the image;

[0020] Figure 4 This is a schematic diagram of the column lifting mechanism of this utility model in its unlifted state;

[0021] Figure 5 This is a schematic diagram of the hydraulic cylinder used in the column lifting mechanism of this utility model;

[0022] Figure 6 This is a schematic diagram of the oil pipe lifting structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the cable chain of this utility model;

[0024] Figure 8 This is a schematic diagram of the raised position of the pull-wire sensor and sensor probe of this utility model;

[0025] Figure 9 This is a schematic diagram of the pull-wire sensor and sensor probe in their unraised state according to this utility model;

[0026] Figure label:

[0027] 1. Base; 2. Lower column; 3. Middle column; 4. Upper column; 5. Double-stage hydraulic cylinder; 6. Lower vertical guide rail; 7. Lower slider; 8. Lower limit plate; 9. Upper vertical guide rail; 10. Upper slider; 11. Upper limit plate; 12. Upper push rod; 13. Lower push rod; 14. Push rod fixing plate; 15. Cable drag chain; 16. Cable drag chain cover; 17. Wire; 18. Cable pull plate; 19. Cable reel; 20. Cable pull sensor; 21. Sensor probe; 22. Cable drag chain guide column. Detailed Implementation

[0028] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figure 1 As shown, an operating table column lifting mechanism includes a base 1, a lower column 2, a middle column 3, an upper column 4, and a two-stage hydraulic cylinder 5.

[0031] like Figure 1-3 As shown, the lower column 2 is fixed on the base 1 (preferably the center of the base), the middle column 3 is set inside the lower column 2, and the upper column 4 is sleeved on the middle column 3; a lower vertical guide rail 6 is provided on one inner side of the lower column 2, a lower slider 7 is provided on the lower vertical guide rail 6, a lower limiting plate 8 is provided at the top of the lower vertical guide rail 6, and the lower slider 7 is fixedly connected to the middle column 3; an upper vertical guide rail 9 is provided on one inner side of the upper column 4, an upper slider 10 is provided on the upper vertical guide rail 9, an upper limiting plate 11 is provided at the upper end of the upper vertical guide rail 9, and a limiting plate can also be provided at the lower end of the upper vertical guide rail 9 to prevent the upper slider 10 from coming off from both ends during movement, and the upper slider 10 is fixedly connected to the middle column 3; in this utility model, the limiting plate is provided at the end of the guide rail to restrict the slider from sliding out of the guide rail.

[0032] like Figure 4-5 As shown, the double-stage hydraulic cylinder 5 is fixed on the central column 3. The upper push rod 12 of the double-stage hydraulic cylinder 5 is fixedly connected to the upper column 4, and the lower push rod 13 of the double-stage hydraulic cylinder 5 is fixedly connected to the base 1. In this utility model, two identical hydraulic cylinders can be arranged in parallel. In this case, the hydraulic oil simultaneously drives the push rods of the two hydraulic cylinders to move downward or upward. Of course, two identical single-stage hydraulic cylinders can also be arranged side by side, but the extension direction of the push rods of the single-stage hydraulic cylinders needs to be set to opposite. In this case, the two parallel single-stage hydraulic cylinders need to be fixed on the central column. The push rod of one single-stage hydraulic cylinder extends downward, driving the single-stage hydraulic cylinder, the central column, and the upper column to move upward. The push rod of the other single-stage hydraulic cylinder extends upward, driving the upper column to move upward. Two single-stage hydraulic cylinders can also be operated simultaneously, moving downward and upward at the same time.

[0033] The lower slider 7 and upper slider 10 are fixedly connected to the opposite sides of the central column 3, respectively. This arrangement allows the column to operate more smoothly and steadily. Furthermore, since the lower, middle, and upper columns of this invention are all square, guide rails and sliders can be installed on all four sides as needed; for example, guide rails and sliders can be installed on all four sides. In this invention, when the upper column descends to its lowest position, the middle column retracts into the lower column, and the upper column completely covers both the lower and middle columns.

[0034] like Figure 5 As shown, the dual-stage hydraulic cylinder 5 includes two parallel single hydraulic cylinders with opposite extension directions. In this invention, the parallel and parallel configurations of the hydraulic cylinders differ. In a parallel configuration, the two hydraulic cylinders share one oil supply pipe and one oil outlet pipe. The oil supply pipe connects to the rodless chamber of the hydraulic cylinder, and the oil outlet pipe connects to the rod chamber. In a parallel configuration, each hydraulic cylinder uses one oil supply pipe and one oil outlet pipe. The oil supply pipe connects to the rodless chamber of the hydraulic cylinder, and the oil outlet pipe connects to the rod chamber. The push rod of the hydraulic cylinder drives the entire assembly to rise, positioned and bearing torque by the guide rail. The piston push rod only needs to bear pressure, resulting in good stress distribution and preventing piston rod bending that could lead to uneven movement or even jamming.

[0035] like Figure 4 As shown, a push rod fixing plate 14 is provided at the top of the upper column 4, and the upper push rod 12 is fixedly connected to the push rod fixing plate 14. The push rod fixing plate 14 can be horizontally arranged at the top of the upper column 4.

[0036] like Figure 6-7As shown, the operating table column lifting mechanism also includes an oil pipe lifting structure, which includes a cable chain 15 and a cable chain cover 16. The cable chain cover 16 is located on the outer side of the upper column 4, and the cable chain 15 is located inside the cable chain cover 16. One end of the cable chain 15 is fixed to the middle column 3. A cable chain guide post 22 is provided above the part of the cable chain 15 that exits the cable chain cover 16. When the upper column 4 descends, the cable chain guide post 22 plays a role in pressing down and guiding the cable chain 15. When the upper column 4 rises, the cable chain guide post 22 does not contact the cable chain 15. One end of the cable chain 15 is fixed to the central column 3, and the other end floats. As the upper column 4 rises, the cable chain 15 and the oil pipe inside the cable chain naturally bend into the internal space of the column under the drive of the central column 3 (extending out of the cable chain cover 22). As the upper column 4 descends, the cable chain 15 slides in the cable chain cover 16 with the assistance of the cable chain guide column 22 (retracting the cable chain cover 22), so that the oil pipe (the oil supply pipe and oil outlet pipe of the hydraulic cylinder) moves with the column as it rises and falls.

[0037] like Figure 1 and Figure 4 As shown, the operating table column lifting mechanism also includes a wire lifting structure, which includes a pull plate 18 and a wire reel 19. The pull plate 18 is fixed to the outer surface of the upper column 4, and the wire reel 19 is fixed to the base 1. The pull plate 18 and the wire reel 19 are vertically aligned. The wires 17 of the circuit board are connected to the pull plate through the wire reel, and then wiring can be done on the upper column 4. The wires in the wire reel 19 extend and retract, allowing the wires to move with the lifting of the upper column.

[0038] like Figure 8-9 As shown, the upper column 4 is equipped with a pull-wire sensor 20, and the bottom of the lower column 2 is equipped with a sensor probe 21 that matches the pull-wire sensor 20. The pull-wire sensor on the upper column 4 and the sensor probe on the bottom of the lower column 2 allow for precise measurement and feedback of the lifting distance of the upper column, which can be viewed by medical personnel. The height can be preset for quick and easy adjustment to the desired precise position. The pull-wire sensor displays the lifting distance.

[0039] like Figure 2 The lower vertical guide rail 6 is installed on the lower column 2, along with the lower limit plate 8. A slider is installed on the middle column 3. The lower column 2 has a guide rail mounting groove to position and fix the lower vertical guide rail 6. After positioning, the middle column 3 is installed and locked onto the corresponding slider. Note that two parallel guide rails are provided for better torque bearing. Similarly, the middle column 3 is also connected to the upper column 4 via a guide rail slider, which will not be elaborated here. Each column section is connected by a guide rail slider, ensuring a secure, gap-free connection without wobbling. As shown in the diagram, a gap is left on the other side of each connected section to prevent installation difficulties. This design significantly alters the traditional top-heavy structure, with the middle column being the smallest, reducing the load when the operating table is raised.

[0040] This utility model adopts a three-section column connection method, and applies guide rail sliders to the columns. The three sections of the columns are tightly connected by the guide rail sliders, which reduces the volume of the middle column and reduces the total load it bears.

[0041] Traditionally, the electrical wires and oil pipes of operating tables are usually located in the base, affecting the height of the base and further affecting the minimum height of the operating table. This makes it more physically and mentally taxing for medical staff during certain surgeries that require an extremely low position. This invention can arrange the electrical wires and oil pipes on the uprights, which rise and fall with the uprights, reducing the height of the base and allowing the operating table to be lowered to a lower position.

[0042] In the process of using this utility model, an electronic control system is used to control the extension or retraction of the push rod of the hydraulic cylinder. This electronic control system can adopt conventional technology in this field.

[0043] For any content not described in detail in this utility model, conventional technical knowledge in the field can be used.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lifting mechanism for an operating table column, characterized in that, The column lifting mechanism includes a base, a lower column, a middle column, an upper column, and a two-stage hydraulic cylinder; The lower column is fixed to the base, the middle column is located inside the lower column, and the upper column is sleeved on the middle column; a lower vertical guide rail is provided on one inner side of the lower column, a lower slider is provided on the lower vertical guide rail, a lower limit plate is provided at the top of the lower vertical guide rail, and the lower slider is fixedly connected to the middle column; an upper vertical guide rail is provided on one inner side of the upper column, an upper slider is provided on the upper vertical guide rail, an upper limit plate is provided at the upper end of the upper vertical guide rail, and the upper slider is fixedly connected to the middle column. The dual-stage hydraulic cylinder is fixed on the central column, with the upper push rod of the dual-stage hydraulic cylinder fixedly connected to the upper column and the lower push rod of the dual-stage hydraulic cylinder fixedly connected to the base.

2. The operating table column lifting mechanism according to claim 1, characterized in that, The lower slider and the upper slider are respectively fixedly connected to the opposite sides of the central column.

3. The operating table column lifting mechanism according to claim 1, characterized in that, The dual-stage hydraulic cylinder comprises two identical hydraulic cylinders connected in parallel, with the push rods of the two cylinders extending in opposite directions.

4. The operating table column lifting mechanism according to claim 1, characterized in that, A push rod fixing plate is provided at the top of the upper column, and the upper push rod is fixedly connected to the push rod fixing plate.

5. The operating table column lifting mechanism according to claim 1, characterized in that, The operating table column lifting mechanism also includes an oil pipe lifting structure, which includes a cable chain, a cable chain cover, and a cable chain guide post. The cable chain cover is located on the outer side of the upper column, the cable chain is located inside the cable chain cover, one end of the cable chain is fixed to the middle column, and a cable chain guide post is provided above the part of the cable chain that exits the cable chain cover.

6. The operating table column lifting mechanism according to claim 1, characterized in that, The operating table column lifting mechanism also includes an electric wire lifting structure, which includes a pull plate and a winding reel; the pull plate is fixed to the outside of the upper column, and the winding reel is fixed to the base, with the pull plate and winding reel corresponding vertically.

7. The operating table column lifting mechanism according to claim 1, characterized in that, The upper column is equipped with a pull-wire sensor, and the bottom of the lower column is equipped with a sensor probe that matches the pull-wire sensor.

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