A surgical table translation structure

Abstract

The utility model relates to operating table translation structure, including rack, connecting base, worm, connecting table top, the worm connects motor, transmission shaft, set up between the base and the table top, the transmission shaft rotation connects the table top, wherein, the transmission shaft is provided with turbine and gear, the turbine engages the worm, the gear engages the rack, through the rotation drive of worm the table top moves relative to the base, the utility model discloses through the rigid engagement between the tooth part, drives operating table translation. Power is directly transmitted by the rigid engagement between the tooth part, reduces response delay. And the displacement of operating table and the transmission ratio of tooth part correspond strictly. And the transmission ratio between turbine worm and gear rack is fixed, is almost not influenced by load and ambient temperature, guarantees the transmission accuracy of operating table. The structure of turbine worm and gear rack can also bear greater load, and has self-locking.

Description

Technical Field

[0001] This utility model relates to the field of operating table technology, and in particular to an operating table translation structure. Background Technology

[0002] The operating table is a platform for performing surgical procedures and anesthesia. The operating table has evolved from manually driven to electro-hydraulic, i.e., electric operating table.

[0003] Electro-hydraulic operating tables rely on hydraulic pressure to transmit power and adjust the table position. The hydraulic fluid is compressible, and the tubing can undergo elastic deformation, causing transmission lag and affecting the accuracy of the operating table's movement. This is especially true when the operating table load changes, as the amount of hydraulic compression and tubing deformation increases, further reducing the accuracy of the operating table's movement.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a translational structure for the operating table to improve the movement accuracy of the operating table.

[0006] The technical solution of this utility model is as follows:

[0007] The operating table translation structure includes:

[0008] Rack and pinion, connecting to the base;

[0009] The worm gear connects to the platform; the worm gear connects to the motor.

[0010] A drive shaft is disposed between the base and the platform; the drive shaft is rotatably connected to the platform.

[0011] The drive shaft is equipped with a worm gear and a gear; the worm gear meshes with the worm; the gear meshes with the rack; the rotation of the worm drives the platform to move relative to the base.

[0012] A further technical solution is that a support is also provided; the support is connected to the table surface; and the worm gear is selectively mounted on the support.

[0013] A further technical solution is that a guide rail is provided on the base along the length direction of the rack; a slider is provided on the bracket to slidably connect to the guide rail.

[0014] A further technical solution is that the platform is also connected to a transmission box; the worm and the transmission shaft extend into the transmission box; the turbine and the gear are disposed inside the transmission box.

[0015] A further technical solution is that the transmission box is integrally formed; a first hole and a second hole are vertically opened on the transmission box; the worm gear extends into the first hole; and the transmission shaft extends into the second hole.

[0016] A further technical solution is to provide bearings between the worm gear and the transmission box, and between the transmission shaft and the transmission box.

[0017] A further technical solution is that a support plate is provided on the base; the support plate contacts the side of the rack away from the gear.

[0018] A further technical solution is that a pad can be provided between the rack and the support plate.

[0019] A further technical solution is to install a sensor on the motor.

[0020] A further technical solution is to provide limiting blocks at both ends of the rack along its length.

[0021] The beneficial technical effects of this utility model are as follows:

[0022] (1) The operating table translation structure in this utility model is equipped with a worm gear and rack and pinion transmission structure. The operating table is driven to translate through the rigid meshing between the teeth. The power is directly transmitted through the rigid meshing between the teeth, reducing the response delay. Moreover, the displacement of the operating table corresponds strictly to the transmission ratio of the teeth. The transmission ratio between the worm gear and rack and pinion is fixed and is almost unaffected by the load and ambient temperature, ensuring the transmission accuracy of the operating table. The structure of the worm gear and rack and pinion can also withstand a large load and has self-locking properties. The large load can stably support the combined weight of the patient, surgical equipment and auxiliary devices during the operation, ensuring that the translation operation is performed smoothly and accurately under heavy load. The self-locking property prevents the operating table from moving under external interference, ensuring the stability of the operating table during the operation.

[0023] (2) Furthermore, a slide rail and a slider are also provided between the support and the table. The guide effect of the slide rail and the slider improves the stability of the operating table during movement.

[0024] (3) Furthermore, an integrated transmission box is provided, with the worm gear and gear housed inside the transmission box. The integrated transmission box improves its sealing performance, reduces lubricant leakage, and thus reduces surgical environment pollution caused by lubricant leakage. Attached Figure Description

[0025] Figure 1 A three-dimensional structural schematic diagram of an operating table translation structure according to an embodiment of the present disclosure is shown.

[0026] Figure 2 A three-dimensional structural diagram of an operating table translation structure according to an embodiment of the present disclosure is shown, with the transmission box hidden.

[0027] Figure 3 A partially enlarged view of the operating table translation structure according to an embodiment of the present disclosure is shown at point A.

[0028] Figure 4 A three-dimensional structural schematic diagram of the transmission box in an operating table translation structure according to an embodiment of the present disclosure is shown.

[0029] Marked in the attached diagram:

[0030] 1. Base; 11. Guide rail; 12. Rack; 13. Support plate; 2. Bracket; 21. Slider; 22. Motor; 3. Transmission box; 31. First hole; 32. Second hole; 4. Worm gear; 5. Drive shaft; 51. Gear; 52. Turbine; 6. Bearing. Detailed Implementation

[0031] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0032] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are 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. Therefore, they should not be construed as limitations on this utility model.

[0033] Figure 1 A three-dimensional structural schematic diagram of an operating table translation structure according to an embodiment of the present disclosure is shown. Figure 2 A three-dimensional structural diagram of an operating table translation structure according to an embodiment of the present disclosure is shown, with the transmission box hidden. Figure 3 A partially enlarged view of the operating table translation structure according to an embodiment of this disclosure at point A is shown. Please refer to... Figure 1 , Figure 2 and Figure 3 The operating table translation structure includes a rack 12 connected to a base 1, a worm gear 4 connected to the table surface, and a motor 22 connected to the worm gear 4. A drive shaft 5 is positioned between the base 1 and the table surface, rotatably connecting the drive shaft 5 to the table surface. The drive shaft 5 is equipped with a worm gear 52 and a gear 51. In some embodiments, the worm gear 52 and gear 51 are keyed to the drive shaft 5, and a shoulder (not shown) and a retaining ring (not shown) are mounted on the drive shaft 5 to fix the worm gear 52 and gear 51 on the drive shaft 5. The worm gear 52 meshes with the worm gear 4, and the gear 51 meshes with the rack 12. The worm gear 4 and worm gear 52 are made of high-strength alloy materials, such as 20CrMnTi for the worm gear 4 and high-strength bronze alloy ZCuSn10Pb1 for the worm gear 52. The rack 12 and gear 51 are made of high-quality alloy steel, such as 42CrMo, and are strengthened through tempering and tooth surface quenching processes to improve their load-bearing capacity. The rotation of the worm gear 4 drives the table surface to move relative to the base 1. The operating table is driven to translate through the rigid meshing between the teeth. Power is directly transmitted through the rigid meshing between the teeth, reducing response delay. Furthermore, the displacement of the operating table strictly corresponds to the transmission ratio of the teeth. The transmission ratio between the worm gear 4 (52) and the rack 12 (51) is fixed, almost unaffected by load and ambient temperature, ensuring the transmission accuracy of the operating table. The structure of the worm gear 4 (52) and the rack 12 (51) can also withstand large loads and has self-locking properties. Large loads are stably supported to bear the combined weight of the patient, surgical equipment, and auxiliary devices during surgery, ensuring smooth and precise translation under heavy loads. The self-locking property prevents the operating table from moving under external interference, ensuring the stability of the operating table during surgery.

[0034] In some embodiments, the motor 22 is connected to a reducer (not shown) to form a geared motor 22, which outputs higher torque to drive the worm 4 to rotate.

[0035] In other embodiments, to ensure self-locking performance, the lead angle of the worm gear 52 can be between 3° and 5°. Combined with an appropriate coefficient of friction between the worm gear 52 and the worm 4, this ensures that after the worm 4 stops rotating, a stable self-locking mechanism is formed between the worm gear 52 and the worm 4 through friction. Simultaneously, the machining errors of the worm gear 52 and the worm 4 are controlled, such as the roundness and cylindricity errors of the worm gear 52's gear ring, and the helix and continuity errors of the worm 4, all within 0.01 mm. High precision reduces meshing unevenness, thereby reducing localized excessive wear, lowering the wear rate of the worm gear 52 and the worm 4, slowing the decline in the self-locking performance of the worm gear 52 and the worm 4, and extending the service life of the worm gear 52 and the worm 4.

[0036] Please refer to Figure 2 and Figure 3The system also includes a support 2, which connects to the operating table. A worm gear 4 is mounted on the support 2. A guide rail 11 is mounted on the base 1 along the length of the rack 12. A slider 21 is mounted on the support 2 and slidably connects to the guide rail 11. The guide effect of the guide rail and slider 21 enhances the stability of the operating table during movement.

[0037] Preferably, limiting blocks are provided at both ends of the rack 12 along its length. This physically restricts the translation of the bracket 2, preventing the gear 51 from disengaging from the rack 12.

[0038] Figure 4 A three-dimensional structural schematic diagram of the transmission box in an operating table translation structure according to an embodiment of this disclosure is shown. Please refer to... Figure 2 , Figure 3 and Figure 4 The platform is also connected to a transmission box 3. The worm gear 4 and the drive shaft 5 extend into the transmission box 3. The turbine 52 and the gear 51 are located inside the transmission box 3 and are covered and protected by the transmission box 3.

[0039] Preferably, the transmission housing 3 is integrally formed. A first hole 31 and a second hole 32 are vertically formed on the transmission housing 3. The worm gear 4 extends into the first hole 31. The drive shaft 5 extends into the second hole 32. The integral transmission housing 3 improves its sealing performance, reduces lubricant leakage, and thus reduces surgical environment contamination caused by lubricant leakage. The transmission housing 3 can be internally equipped with oil / air passages for auxiliary heat dissipation. The outer shell of the transmission housing 3 can be die-cast to form a heat dissipation fin structure, further improving the heat dissipation performance of the transmission housing 3. This prevents the lubricant inside the transmission housing 3 from failing due to high temperatures, which could affect the inter-gear meshing transmission.

[0040] More preferably, bearings 6 are respectively provided between the worm gear 4 and the transmission housing 3, and between the transmission shaft 5 and the transmission housing 3. The bearing 6 between the worm gear 4 and the transmission housing 3 can be, but is not limited to, a tapered roller bearing 6. Utilizing the characteristic that tapered rollers can simultaneously withstand radial and axial loads, they resist the radial and axial forces generated during the transmission of the worm gear 52 and the worm gear 4. The bearing 6 between the transmission shaft 5 and the transmission housing 3 can be, but is not limited to, a deep groove ball bearing 6, which bears the radial load between the transmission shaft 5 and the transmission housing 3.

[0041] Please refer to Figure 2 and Figure 3 A support plate 13 is provided on the base 1. The support plate 13 contacts the side of the rack 12 away from the gear 51 to support the rack 12. The support plate 13 and the rack 12 may be connected by bolts, but are not limited to bolts.

[0042] Preferably, a shim can be provided between the rack 12 and the support plate 13. By replacing shims of different thicknesses, the clearance between the rack 12 and the gear 51 can be easily adjusted, ensuring the stability of the transmission between the gear 51 and the rack 12. Specifically, the meshing clearance of the gear 51 and the rack 12 is between 0.05mm and 0.1mm, and the center distance tolerance of the worm gear 4 and worm wheel 52 can be controlled within [specific tolerance range]. Within 0.02mm. To avoid excessive clearance, which could cause lag or jamming during the transmission of the worm gear 52, worm 4, gear 51, and rack 12, ensuring the transmission performance of the operating table's sliding structure.

[0043] More preferably, a sensor is mounted on the motor 22. The sensor can be, but is not limited to, a commercially available Allegro A3144 Hall effect sensor, which is mounted on the main body of the motor 22. A magnet is mounted on the shaft of the motor 22 to trigger the Hall effect sensor. The rotation angle of the motor 22, fed back by the sensor, can determine the relative position of the gear 51 and rack 12, facilitating software-level limiting. The software and the limiting block work together to precisely control the stroke of the operating table, preventing the gear 51 and rack 12 from disengaging. In some embodiments, a steering sensor, a current sensor, and a display screen can also be provided to comprehensively monitor the operating status of the motor 22, allowing the user to view the motor 22's operating status in real time.

[0044] The specific workflow of this utility model is as follows:

[0045] When the operating table is moved, the worm gear 4 is driven to rotate by the motor 22. The rotation of the worm gear 4 drives the meshing worm 52 to rotate. The rotating worm 52 drives the transmission shaft 5 to rotate synchronously, which in turn drives the gear 51 on the transmission shaft 5 to rotate. The gear 51 meshes with the rack 12, and the rotating gear 51 drives the entire support 2 and the operating table to translate along the rack 12. During the translation, the slider 21 slides along the guide rail 11. When the operating table is translated in the opposite direction, the worm gear 4 is driven to rotate in the opposite direction by the motor 22. The reverse rotation of the worm gear 4 drives the worm 52, the transmission shaft 5, and the gear 51 to rotate in the opposite direction. The gear 51 meshes with the rack 12, and the reverse rotation of the gear 51 drives the entire support 2 and the operating table to translate in the opposite direction along the rack 12.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A surgical table translation structure, characterized in that, The operating table translation structure includes: Rack and pinion, connecting to the base; The worm gear connects to the platform; the worm gear connects to the motor. A drive shaft is disposed between the base and the platform; the drive shaft is rotatably connected to the platform. The drive shaft is equipped with a worm gear and a gear; the worm gear meshes with the worm; the gear meshes with the rack; the rotation of the worm drives the platform to move relative to the base.

2. The operating table translation structure as described in claim 1, characterized in that: A support is also provided; the support is connected to the table surface; the worm gear is selectively mounted on the support.

3. The operating table translation structure as described in claim 2, characterized in that: A guide rail is provided on the base along the length of the rack; a slider is provided on the bracket to slidably connect to the guide rail.

4. The operating table translation structure as described in claim 1, characterized in that: The platform is also connected to a transmission box; the worm and the transmission shaft extend into the transmission box; the turbine and the gear are disposed inside the transmission box.

5. The operating table translation structure as described in claim 4, characterized in that: The transmission box is integrally formed; a first hole and a second hole are vertically formed on the transmission box; the worm gear extends into the first hole; and the transmission shaft extends into the second hole.

6. The operating table translation structure as described in claim 5, characterized in that: Bearings are respectively provided between the worm gear and the transmission box, and between the transmission shaft and the transmission box.

7. The operating table translation structure as described in claim 1, characterized in that: A support plate is provided on the base; the support plate contacts the side of the rack away from the gear.

8. The operating table translation structure as described in claim 7, characterized in that: A spacer block may be provided between the rack and the support plate.

9. The operating table translation structure as described in claim 1, characterized in that: Sensors are installed on the motor.

10. The operating table translation structure as described in claim 1, characterized in that: Limiting blocks are provided at both ends of the rack along its length.

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