A tilting mechanism for an electric operating table

Abstract

This invention relates to a tilting mechanism for an electric operating table, comprising a base fixing unit, a rotating unit, and a lead screw drive unit. The lead screw drive unit is installed near the bottom of the front end of the base fixing unit, and the rotating unit is installed on the top outer side of the base fixing unit. The lead screw drive unit can drive the rotating unit on the upper outer side to rotate. A tilting angle detection unit is also provided at the front end of the rotating unit. This invention, through the structural arrangement of the base fixing unit, rotating unit, and lead screw drive unit, achieves a reasonable spatial layout and saves height space. Furthermore, the lead screw drive unit structure of this invention increases the overall load-bearing capacity and resistance to overturning torque of the device.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a tilting mechanism for an electric operating table. Background Technology

[0002] After extensive searching, the prior art publication number CN211461023U was found, which discloses a multi-section column and outer cover lifting and large-angle forward, backward, left and right tilting device for an operating table. The device includes a base plate, with the four corners of the top of the base plate hinged to the bottom ends of four support columns via ball joints. One side of each of the four support columns is hinged to both ends of two longitudinal beams via ball joints. One side of the middle of each of the two longitudinal beams is fixedly connected to both ends of a crossbeam. A support seat is fixedly provided on one side of the top of the base plate. This invention, with its multi-section column and outer cover lifting and large-angle forward, backward, left and right tilting device, features four three-section electric push rods for lifting. During surgery, the surgeon can use these four electric push rods to raise and lower the bed, facilitating the operation. A cover is installed at the bottom of the four square plates, with a first and second protective sleeve protecting the two telescopic rods of the three-section electric push rods.

[0003] Currently, DSA electric operating tables with tilting functions mostly use electric or hydraulic cylinders to drive the left and right tilting. The tilting part is arranged on a mandrel, and the base part has a bushing, with the mandrel inserted in the middle of the bushing. An electric (or hydraulic) cylinder, hinged at both ends, is placed parallel to the mandrel and at a certain distance from it. The cylinder base is mounted on the base part, and the piston head is mounted on a hinged support of the tilting part. The piston extends and retracts, pushing the head hinged support, thereby tilting the entire structure. This structure occupies a large space and lacks mechanical self-locking capability.

[0004] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a tilting mechanism for an electric operating table, making it more valuable for industrial use. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the purpose of this invention is to provide a tilting mechanism for an electric operating table.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electric operating table tilting mechanism includes a base fixing unit, a rotating unit, and a screw drive unit. The screw drive unit is installed at the front end of the base fixing unit near the bottom. The rotating unit is installed on the top outer side of the base fixing unit. The screw drive unit can drive the rotating unit on the upper outer side to rotate. The front end of the rotating unit is also provided with a tilting angle detection unit.

[0008] The basic fixing unit includes a front fixing plate, two side fixing plates and a rear fixing plate that are spliced ​​together. A front mandrel is installed near the top of the front fixing plate and a rear oil-free bushing is installed near the top of the rear fixing plate. The front mandrel and the rear oil-free bushing are coaxially arranged.

[0009] The rotating unit includes a front rotating plate, two side rotating plates and a rear rotating plate spliced ​​together. A front oil-free bushing is installed near the top of the front rotating plate, and a rear spindle is installed near the top of the rear rotating plate. The front oil-free bushing and the rear spindle are coaxially arranged. The front spindle is connected to the front oil-free bushing, and the rear spindle is connected to the rear oil-free bushing. Two slider base plates are arranged side by side along the front-rear direction at the bottom of the front rotating plate. An angle slider is provided at the bottom opening of the slider base plate, and a slider pad is provided between the two slider base plates.

[0010] The lead screw drive unit includes a front mounting base plate, a motor mounting plate, a motor, a rear mounting base plate, a lead screw nut, and a lead screw. The front mounting base plate is mounted at the bottom of the right-side side fixed plate, and the rear mounting base plate is mounted at the bottom of the left-side side fixed plate. The motor is mounted at the bottom of the front mounting base plate via the motor mounting plate. The lead screw is mounted between the front and rear mounting base plates along the left and right sides. The output shaft on the right side of the motor is connected to the lead screw from bottom to top via a motor gear, an idler gear, and a lead screw gear. A lead screw nut is mounted on the lead screw, and circular lead screw nut protrusions are provided on both the front and rear sides of the lead screw nut. The circular hole on the inner side of the tilt slider fits into the lead screw nut protrusion.

[0011] As a further improvement of the present invention, the tilt angle detection unit includes a rotor mounting plate, a rotor, a stator, and a stator mounting plate. The stator is mounted on the front end of the front spindle via the stator mounting plate. The rotor is located outside the stator and is mounted on the rotor mounting plate. The rotor mounting plate is mounted on the front rotating upright plate via several rotor mounting rods. The rotor, stator, and front spindle are coaxial.

[0012] As a further improvement of the present invention, an adjusting ring and a wear-resistant thrust washer are installed sequentially from front to back on the front spindle on the rear side of the stator mounting plate. The adjusting ring is installed on the front spindle by locking nuts and locking washers. The adjusting ring is connected to the wear-resistant thrust washer at the rear end by a plurality of adjusting screw and nut mechanisms along the circumferential direction. The wear-resistant thrust washer is in contact with the friction plate at the rear end installed on the front rotating vertical plate.

[0013] As a further improvement of the present invention, the adjusting screw and nut mechanism includes an adjusting screw, an adjusting nut, and a countersunk screw. The adjusting screw is installed on the adjusting ring and passes through both ends of the adjusting ring. The adjusting screw is installed on both ends of the adjusting ring by two adjusting nuts. Each adjusting screw is equipped with two adjusting nuts, which are respectively clamped on both sides of the adjusting ring. The rear end of the adjusting screw is provided with an adjusting screw hole. The front end of the countersunk screw is connected to the adjusting screw hole. The wear-resistant thrust washer is provided with a countersunk hole, and the rear end of the countersunk screw is installed in the countersunk hole.

[0014] As a further improvement of the present invention, a number of compression springs are evenly arranged along the circumferential direction between the adjusting ring and the wear-resistant thrust washer.

[0015] As a further improvement of the present invention, guide copper rods are installed on the left and right inner sides of the bottom opening of the slider substrate. The guide copper rods are installed on the bottom opening of the slider substrate by copper rod locking screws. The guide copper rods are cylindrical structures. Arc-shaped recesses are provided on the front and rear sides of the tilt slider. The arc-shaped recesses are connected to the outer diameter of the cylindrical guide copper rods, and the arc-shaped recesses can move up and down relative to the outer diameter of the cylindrical guide copper rods.

[0016] As a further improvement of the present invention, a front bearing pressure block is provided on the front mounting base plate inside the lead screw gear, and a thrust bearing fixing sleeve is provided on the inner side of the front mounting base plate. The lead screw is installed in the thrust bearing fixing sleeve through the front thrust bearing, and the lead screw is installed in the front bearing pressure block through the front deep groove ball bearing. A thrust bearing adjusting sleeve is installed on the rear mounting base plate on the left side of the lead screw, and a rear bearing pressure block is installed on the left side of the rear mounting base plate. The lead screw is installed in the thrust bearing adjusting sleeve through the rear thrust bearing, and the lead screw is installed in the rear bearing pressure block through the rear deep groove ball bearing. The idler gear is installed between the idler gear tensioning block and the motor mounting plate through the idler gear shaft. The idler gear tensioning block is installed on the motor mounting plate through the tensioning block pad. The idler gear shaft is connected to the idler gear through a flange bearing.

[0017] As a further improvement of the present invention, the left and right sides of the idler shaft are respectively installed in the grooves of the idler tensioning block and the motor mounting plate, and the idler shaft is fixed in the grooves of the idler tensioning block or the motor mounting plate by the idler shaft clamping screw.

[0018] As a further improvement of the present invention, the thrust bearing adjusting sleeve can be adjusted along the left and right sides by means of several adjusting sleeve adjusting screws. The set screw tightens the adjusting screw to prevent it from loosening, thereby securing the thrust bearing adjusting sleeve.

[0019] As a further improvement of the present invention, a shaft end washer is provided on the lead screw outside the lead screw gear, and a shaft end washer is provided on the motor output shaft outside the motor gear.

[0020] By means of the above-described solution, the present invention has at least the following advantages:

[0021] 1. The present invention, through the structural arrangement of the basic fixing unit, the rotating unit and the lead screw transmission unit, has a reasonable spatial layout and can save height space;

[0022] 2. Through the structural design of the screw drive unit, the overall equipment has greater load-bearing capacity and resistance to overturning torque.

[0023] 3. This invention has mechanical self-locking properties, making it safer;

[0024] 4. The present invention can adjust the axial clearance between the foundation fixing unit and the rotating unit through the tilt angle detection unit.

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the left and right tilting mechanism of an electric operating table according to the present invention;

[0028] Figure 2 yes Figure 1 Schematic diagram of the structure of the intermediate foundation fixed unit;

[0029] Figure 3 yes Figure 1 Schematic diagram of the rotating unit;

[0030] Figure 4 yes Figure 1 A front view structural schematic diagram of the lead screw drive unit;

[0031] Figure 5 yes Figure 1 A rear view structural schematic diagram of the lead screw drive unit;

[0032] Figure 6 yes Figure 4 The right view;

[0033] Figure 7 yes Figure 6 Sectional view at point AA;

[0034] Figure 8 yes Figure 1 A partial structural diagram of the central foundation fixing unit, rotation unit, and tilt angle detection unit;

[0035] Figure 9 yes Figure 8 A schematic diagram of the internal structure.

[0036] The meanings of the labels in the figures are as follows.

[0037] Basic fixing unit 1, rotation unit 2, lead screw transmission unit 3, tilt angle detection unit 4;

[0038] 5. Front fixed plate, 6. Side fixed plate, 7. Rear fixed plate, 8. Rear oil-free bushing, 9. Front spindle;

[0039] Front rotating vertical plate 10, front oil-free bushing 11, side rotating vertical plate 12, rear rotating vertical plate 13, rear spindle 14, slider base plate 15, guide copper rod 16, copper rod locking screw 17, slider pad 18.

[0040] Front mounting base plate 19, motor mounting plate 20, motor 21, rear mounting base plate 22, screw nut 23, screw rod 24, thrust bearing fixing sleeve 25, front bearing pressure block 26, thrust bearing adjusting sleeve 27, rear bearing pressure block 28, screw rod gear 29, tensioning block pad 30, idler wheel tensioning block 31, idler wheel shaft 32, idler wheel shaft clamping screw 33, idler gear 34, motor gear 35, shaft end washer 36, adjusting sleeve set screw 37, adjusting sleeve adjusting screw 38, front deep groove ball bearing 39, front thrust bearing 40, rear thrust bearing 41, rear deep groove ball bearing 42, flange bearing 43;

[0041] Rotor mounting plate 44, rotor 45, stator 46, rotor mounting rod 47, stator mounting plate 48, locking nut 49, adjusting ring 50, wear-resistant thrust washer 51, friction plate 52, tilt slider 53. Detailed Implementation

[0042] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] Example

[0045] like Figures 1-9 As shown,

[0046] An electric operating table tilting mechanism includes a base fixing unit 1, a rotating unit 2, and a screw drive unit 3. The screw drive unit 3 is installed at the front end of the base fixing unit 1 near the bottom. The rotating unit 2 is installed on the top outer side of the base fixing unit 1. The screw drive unit 3 can drive the rotating unit 2 on the upper outer side to rotate. The front end of the rotating unit 2 is also provided with a tilt detection unit 4.

[0047] The basic fixing unit 1 includes a front fixing plate 5, two side fixing plates 6 and a rear fixing plate 7 spliced ​​together. A front mandrel 9 is installed on the front fixing plate 5 near the top, and a rear oil-free bushing 8 is installed on the rear fixing plate 7 near the top. The front mandrel 9 and the rear oil-free bushing 8 are coaxially arranged.

[0048] The rotating unit 2 includes a front rotating plate 10, two side rotating plates 12 and a rear rotating plate 13 spliced ​​together. A front oil-free bushing 11 is installed near the top of the front rotating plate 10, and a rear spindle 14 is installed near the top of the rear rotating plate 13. The front oil-free bushing 11 and the rear spindle 14 are coaxially arranged. The front spindle 9 is connected to the front oil-free bushing 11, and the rear spindle 14 is connected to the rear oil-free bushing 8. Two slider base plates 15 are arranged side by side along the front-rear direction at the bottom of the front rotating plate 10. An angle slider 53 is provided at the bottom opening of the slider base plate 15, and a slider pad 18 is provided between the two slider base plates 15.

[0049] The lead screw drive unit 3 includes a front mounting base plate 19, a motor mounting plate 20, a motor 21, a rear mounting base plate 22, a lead screw nut 23, and a lead screw 24. The front mounting base plate 19 is mounted on the bottom of the right-side side fixed plate 6, and the rear mounting base plate 22 is mounted on the bottom of the left-side side fixed plate 6. The motor 21 is mounted on the bottom of the front mounting base plate 19 via the motor mounting plate 20. The lead screw 24 is mounted between the front mounting base plate 19 and the rear mounting base plate 22 along the left and right sides. The output shaft on the right side of the motor 21 is connected to the lead screw 24 from bottom to top via a motor gear 35, an idler gear 34, and a lead screw gear 29. The lead screw nut 23 is mounted on the lead screw 24. Circular lead screw nut protrusions are provided on both the front and rear sides of the lead screw nut 23. The circular hole inside the tilt slider 53 fits into the lead screw nut protrusion. A shaft end washer 36 is provided on the lead screw 24 outside the lead screw gear 29, and a shaft end washer 36 is provided on the output shaft of the motor 21 outside the motor gear 35.

[0050] Guide copper rods 16 are installed on the left and right inner sides of the bottom opening of the slider substrate 15. The guide copper rods 16 are installed in the bottom opening of the slider substrate 15 by copper rod locking screws 17. The guide copper rods 16 are cylindrical structures. Arc-shaped recesses are provided on the front and rear sides of the tilt slider 53. The arc-shaped recesses are connected to the outer diameter of the cylinder of the guide copper rods 16, and the arc-shaped recesses can move up and down relative to the outer diameter of the cylinder of the guide copper rods 16.

[0051] The bearing mechanism on the lead screw drive unit 3: A front bearing pressure block 26 is provided on the front mounting base plate 19 inside the lead screw gear 29. A thrust bearing fixing sleeve 25 is provided on the inner side of the front mounting base plate 19. The lead screw 24 is installed in the thrust bearing fixing sleeve 25 through the front thrust bearing 40. The lead screw 24 is installed in the front bearing pressure block 26 through the front deep groove ball bearing 39. A thrust bearing adjusting sleeve 27 is installed on the rear mounting base plate 22 on the left side of the lead screw 24. A rear bearing pressure block 28 is installed on the left side of the rear mounting base plate 22. The lead screw 24 is installed in the thrust bearing adjusting sleeve 27 through the rear thrust bearing 41. The lead screw 24 is installed in the rear bearing pressure block 28 through the rear deep groove ball bearing 42. The idler gear 34 is installed between the idler gear tensioning block 31 and the motor mounting plate 20 through the idler gear shaft 32. The idler gear tensioning block 31 is installed on the motor mounting plate 20 through the tensioning block pad 30. The idler gear shaft 32 is connected to the idler gear 34 through the flange bearing 43. The left and right sides of the idler shaft 32 are respectively installed in the grooves of the idler tension block 31 and the motor mounting plate 20. The idler shaft 32 is fixed in the grooves of the idler tension block 31 or the motor mounting plate 20 by the idler shaft clamping screw 33.

[0052] Furthermore, the thrust bearing adjusting sleeve 27 can be adjusted in the left and right directions via several adjusting sleeve adjusting screws 38. Set screws 37 tighten the adjusting screws 38 to prevent loosening, thereby securing the thrust bearing adjusting sleeve 27. Each adjusting screw 38 is tightened by a set screw 37 to ensure reliable fastening of the thrust bearing adjusting sleeve 27.

[0053] The tilt detection unit 4 includes a rotor mounting plate 44, a rotor 45, a stator 46, and a stator mounting plate 48. The stator 46 is mounted on the front end of the front spindle 9 via the stator mounting plate 48. The rotor 45 is located outside the stator 46 and is mounted on the rotor mounting plate 44. The rotor mounting plate 44 is mounted on the front rotating upright plate 10 via several rotor mounting rods 47. The rotor 45, stator 46, and front spindle 9 are coaxial. An adjusting ring 50 and a wear-resistant thrust washer 51 are sequentially mounted on the front spindle 9 from front to back on the rear side of the stator mounting plate 48. The adjusting ring 50 is mounted on the front spindle 9 via a locking nut 49 and a locking washer. The adjusting ring 50 is connected to the wear-resistant thrust washer 51 at the rear end via several adjusting screw and nut mechanisms along the circumferential direction. The wear-resistant thrust washer 51 is in contact with the friction plate 52 mounted on the front rotating upright plate 10 at the rear end. Several compression springs are evenly arranged along the circumference between the adjusting ring 50 and the wear-resistant thrust washer 51. The wear-resistant thrust washer 51 is made to fit against the friction plate 52 by the elastic force of the compression springs.

[0054] The aforementioned adjusting screw and nut mechanism includes an adjusting screw, an adjusting nut, and a countersunk screw. The adjusting screw is installed on the adjusting ring 50 and passes through both ends of the adjusting ring 50. The adjusting screw is installed on both ends of the adjusting ring 50 through two adjusting nuts. Each adjusting screw has two adjusting nuts installed on it and clamped on both sides of the adjusting ring 50 respectively. The rear end of the adjusting screw is provided with an adjusting screw hole. The front end of the countersunk screw is connected to the adjusting screw hole. The wear-resistant thrust washer 51 has a countersunk hole, and the rear end of the countersunk screw is installed in the countersunk hole.

[0055] An electric operating table tilting mechanism includes four components: a base fixing unit 1, a rotation unit 2, a lead screw transmission unit 3, and a tilting detection unit 4.

[0056] The basic fixed unit 1 is actually the lifting outer frame of the operating table, which is composed of four upright plates (i.e., the front fixed upright plate 5, two side fixed upright plates 6, and the rear fixed upright plate 7). The front fixed upright plate 5 is equipped with a front spindle 9, and the rear fixed upright plate 7 is equipped with a rear oil-free bushing 8 with a flange. The main body of the bushing is made of high-strength brass, and its cylindrical part and flange surface are inlaid with solid lubricant to provide lubrication and reduce friction. The two are strictly coaxial and serve as the rotation support for the moving part (i.e., the rotating unit 2).

[0057] The main body of the rotating unit 2 is composed of four plates: a front rotating plate 10, two side rotating plates 12, and a rear rotating plate 13. The front rotating plate 10 is fitted with the same front oil-free bushing 11 as described above, and the rear rotating plate 13 is fitted with a rear spindle 14, which respectively mates with the front spindle 9 and the rear oil-free bushing 8 of the base part to form a complete rotating pair. A slider base plate 15 is installed below the front of the front rotating plate 10, with a slider pad 18 between them. Each of the two slider base plates 15 has an opening at its bottom, within which a matching tilt slider 53 slides. The slider base plate 15 is initially a single plate; after machining a deep hole, a piece of plate is cut off along the axis of the deep hole, and the cut-off plate is processed into the tilt slider 53. During use, a guide copper rod 16 is fixed in each of the left and right halves of the deep hole at the bottom of the slider base plate 15. The copper rods are made of wear-resistant tin bronze. The tilt slider 53 slides against the guide copper rod 16 (i.e., the arc-shaped recess and the outer diameter of the cylindrical guide copper rod 16) through half-holes on both sides. Because the half-holes on both sides of the tilt slider 53 and the half-hole inside the opening of the slider base plate 15 are initially the same, this method provides excellent guidance and ensures smooth, gapless operation. The circular hole inside the slider base plate 15 serves as the force application point, and is a certain distance from the axis of rotation of the moving part, which is the driving arm.

[0058] The lead screw drive unit 3 includes a front mounting base plate 19, a motor mounting plate 20, a motor 21, a rear mounting base plate 22, a lead screw nut 23, and a lead screw 24. The two sides of the entire assembly base fixing unit 1 are fixed to the upright plate 6 via the head and tail mounting plates (i.e., the front mounting base plate 19 and the rear mounting base plate 22). The trapezoidal lead screw 24 has two steps at its head, with two sections of optical shaft machined thereon. The tail has only one step, with one end of the optical shaft machined thereon. Each optical shaft is fitted with a thrust bearing, and a deep groove ball bearing is fitted on the outer side. One side of the thrust bearing is pressed against the step surface of the optical shaft near the thread, and the other side is pressed against the corresponding force-bearing plate surface. The two bearings at the head (i.e., the front deep groove ball bearing 39 and the front thrust bearing 40) are fixed, while the tail thrust bearings (i.e., the rear thrust bearing 41 and the rear deep groove ball bearing 42) can be adjusted axially via adjusting sleeves to eliminate movement backlash. The tail end optical shaft can move axially within the deep groove ball bearing at the tail end to eliminate length errors caused by machining, assembly, and thermal expansion and contraction. A keyway is machined on the optical shaft at the end of the lead screw head, and a lead screw gear 29 is fitted onto it. The lead screw gear 29 is fixed in place by a key connection to prevent rotation, meaning the two cannot rotate relative to each other. The lead screw nut 23 is machined from a single piece of wear-resistant tin bronze. A trapezoidal thread is formed in the central through hole of a square block, and a small section of optical shaft (i.e., lead screw nut protrusion) extends from both the front and rear of the block, inserting into the circular hole inside the aforementioned tilt slider 53. The motor 21 is arranged parallel to the lead screw. A motor gear 35 is fitted onto the output shaft of the motor 21. An adjustable idler gear 34 is located between the motor gear 35 and the lead screw gear 29. A pair of flange bearings 43 are installed inside the idler gear 34, and the idler shaft 32 can move within a preset groove to adjust the backlash. The three gears are arranged in a triangular shape, but the three points are approximately in a straight line. The coprime number of teeth on the three gears ensures even wear during use. The rotation of the lead screw drives the lead screw nut to move left and right, which in turn drives the entire movable part to rotate via the slider base plate 15. The lead screw nut cannot detach from the lead screw, so the magnitude of the driving force arm will change during rotation, at which point the tilt slider 53 slides relative to the slider base plate 15.

[0059] The tilt detection unit 4 is used to measure the axial clearance between the foundation fixing unit 1 and the rotating unit 2. The adjustment mechanism is located at the front spindle 9. The axial clearance of the first half of the rotating joint can be adjusted to the optimal value, while the second half of the rotating joint is axially floating. An adjusting ring 50 is fixed to the front spindle, located outside the front rotating plate 10. The adjusting ring 50 is installed on the front spindle 9 using a locking nut 49 and a locking washer. The adjusting ring 50 has four holes evenly distributed on its surface, through which four adjusting screws pass. The adjusting screws connect to wear-resistant thrust washers 51, which contain solid lubricant. Under the elastic force of the compression spring, the wear-resistant thrust washers 51 naturally adhere to the friction plate 52, which is mounted on the front rotating plate 10. The front rotating plate 10 is adjusted so that the flange end face with the oil-free flange bushing adheres to the stepped surface of the front spindle 9, and the adjusting nut installed on the adjusting screw is tightened to lock the wear-resistant thrust washers 51. The rotation unit 2 eliminates axial clearance relative to the base fixed unit 1. A stator mounting plate 48 is installed at the end of the front spindle 9, and the stator 46 of the angle detection sensor is fixedly mounted on the stator mounting plate 48. The rotor mounting plate 44 is mounted on the front rotating upright plate 10 via two rotor mounting rods 47. The rotor 45 of the angle sensor is mounted on the rotor mounting plate 44, and the stator, rotor, and front spindle are coaxial. When the rotation unit 2 rotates, the rotor rotates at the same angle relative to the stator, thereby detecting the angle.

[0060] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood through the specific circumstances.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tilting mechanism for an electric operating table, comprising a base fixing unit (1), a rotating unit (2), and a lead screw transmission unit (3), characterized in that, A screw drive unit (3) is installed at the front end of the base fixing unit (1) near the bottom. The rotating unit (2) is installed on the top outer side of the base fixing unit (1). The screw drive unit (3) can drive the rotating unit (2) on the upper outer side to rotate. The front end of the rotating unit (2) is also provided with an inclination detection unit (4). The basic fixing unit (1) includes a front fixing plate (5), two side fixing plates (6) and a rear fixing plate (7) spliced ​​together. A front mandrel (9) is installed on the front fixing plate (5) near the top, and a rear oil-free bushing (8) is installed on the rear fixing plate (7) near the top. The front mandrel (9) and the rear oil-free bushing (8) are coaxially arranged. The rotating unit (2) includes a front rotating plate (10), two side rotating plates (12) and a rear rotating plate (13) spliced ​​together. A front oil-free bushing (11) is installed near the top of the front rotating plate (10), and a rear spindle (14) is installed near the top of the rear rotating plate (13). The front oil-free bushing (11) and the rear spindle (14) are coaxially arranged. The front spindle (9) is connected to the front oil-free bushing (11), and the rear spindle (14) is connected to the rear oil-free bushing (8). Two slider base plates (15) are arranged side by side along the front-rear direction at the bottom of the front rotating plate (10). An angle slider (53) is provided at the bottom opening of the slider base plate (15), and a slider pad (18) is provided between the two slider base plates (15). The lead screw drive unit (3) includes a front mounting base plate (19), a motor mounting plate (20), a motor (21), a rear mounting base plate (22), a lead screw nut (23), and a lead screw (24). The front mounting base plate (19) is mounted on the bottom of the right-side side fixed plate (6), and the rear mounting base plate (22) is mounted on the bottom of the left-side side fixed plate (6). The motor (21) is mounted on the bottom of the front mounting base plate (19) via the motor mounting plate (20). The lead screw (24) is installed between the front mounting base plate (19) and the rear mounting base plate (22) along the left and right sides. The output shaft of the motor (21) on the right side is connected to the lead screw (24) from bottom to top through the motor gear (35), idler gear (34) and lead screw gear (29). A lead screw nut (23) is installed on the lead screw (24). Circular lead screw nut protrusions are provided on both the front and rear sides of the lead screw nut (23). The circular hole on the inner side of the tilt slider (53) is fitted into the lead screw nut protrusion.

2. The electric operating table tilting mechanism as described in claim 1, characterized in that, The tilt detection unit (4) includes a rotor mounting plate (44), a rotor (45), a stator (46), and a stator mounting plate (48). The stator (46) is mounted on the front end of the front spindle (9) via the stator mounting plate (48). The rotor (45) is located outside the stator (46). The rotor (45) is mounted on the rotor mounting plate (44). The rotor mounting plate (44) is mounted on the front rotating upright plate (10) via several rotor mounting rods (47). The rotor (45), stator (46), and front spindle (9) are coaxial.

3. The electric operating table tilting mechanism as described in claim 2, characterized in that, An adjusting ring (50) and a wear-resistant thrust washer (51) are installed sequentially from front to back on the front spindle (9) on the rear side of the stator mounting plate (48). The adjusting ring (50) is installed on the front spindle (9) by locking nuts (49) and locking washers. The adjusting ring (50) is connected to the wear-resistant thrust washer (51) at the rear end by a series of adjusting screws and nuts along the circumferential direction. The wear-resistant thrust washer (51) is in contact with the friction plate (52) installed on the front rotating plate (10) at the rear end.

4. The electric operating table tilting mechanism as described in claim 3, characterized in that, The adjusting screw and nut mechanism includes an adjusting screw, an adjusting nut, and a countersunk screw. The adjusting screw is installed on the adjusting ring (50) and passes through both ends of the adjusting ring (50). The adjusting screw is installed on both ends of the adjusting ring (50) by two adjusting nuts. Each adjusting screw has two adjusting nuts installed on it and clamped on both sides of the adjusting ring (50). The rear end of the adjusting screw is provided with an adjusting screw hole. The front end of the countersunk screw is connected to the adjusting screw hole. The wear-resistant thrust washer (51) is provided with a countersunk hole. The rear end of the countersunk screw is installed in the countersunk hole.

5. The electric operating table tilting mechanism as described in claim 3, characterized in that, Several compression springs are evenly arranged along the circumferential direction between the adjusting ring (50) and the wear-resistant thrust washer (51).

6. The electric operating table tilting mechanism as described in claim 1, characterized in that, Guide copper rods (16) are installed on the left and right inner sides of the bottom opening of the slider base plate (15). The guide copper rods (16) are installed on the bottom opening of the slider base plate (15) by copper rod locking screws (17). The guide copper rods (16) are cylindrical structures. Arc-shaped recesses are provided on the front and rear sides of the tilt slider (53). The arc-shaped recesses are connected to the outer diameter of the cylinder of the guide copper rods (16), and the arc-shaped recesses can move up and down relative to the outer diameter of the cylinder of the guide copper rods (16).

7. The electric operating table tilting mechanism as described in claim 1, characterized in that, A front bearing pressure block (26) is provided on the front mounting base plate (19) inside the lead screw gear (29). A thrust bearing fixing sleeve (25) is provided on the inner side of the front mounting base plate (19). The lead screw (24) is installed in the thrust bearing fixing sleeve (25) through the front thrust bearing (40). The lead screw (24) is installed in the front bearing pressure block (26) through the front deep groove ball bearing (39). A thrust bearing adjusting sleeve (27) is installed on the rear mounting base plate (22) on the left side of the lead screw (24). A thrust bearing adjusting sleeve (27) is installed on the left side of the rear mounting base plate (22). The rear bearing pressure block (28) is provided. The lead screw (24) is installed in the thrust bearing adjusting sleeve (27) through the rear thrust bearing (41). The lead screw (24) is installed in the rear bearing pressure block (28) through the rear deep groove ball bearing (42). The idler gear (34) is installed between the idler tension block (31) and the motor mounting plate (20) through the idler shaft (32). The idler tension block (31) is installed on the motor mounting plate (20) through the tension block pad (30). The idler shaft (32) is connected to the idler gear (34) through the flange bearing (43).

8. The electric operating table tilting mechanism as described in claim 7, characterized in that, The left and right sides of the idler shaft (32) are respectively installed in the grooves of the idler tension block (31) and the motor mounting plate (20). The idler shaft (32) is fixed in the groove of the idler tension block (31) or the motor mounting plate (20) by the idler shaft clamping screw (33).

9. The electric operating table tilting mechanism as described in claim 7, characterized in that, The thrust bearing adjusting sleeve (27) can adjust the movement clearance of the thrust bearing adjusting sleeve (27) along the left and right sides by a number of adjusting sleeve adjusting screws (38). The set screw (37) tightens the adjusting screw (38) to prevent it from loosening, thereby securing the thrust bearing adjusting sleeve (27).

10. The electric operating table tilting mechanism as described in claim 7, characterized in that, A shaft end washer (36) is provided on the lead screw (24) outside the lead screw gear (29), and a shaft end washer (36) is provided on the output shaft of the motor (21) outside the motor gear (35).

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