Lifting assembly and medical bed

Abstract

The application relates to a lifting assembly and a medical bed. The lifting assembly comprises a fixed base, a lifting base and a driving part. The lifting base is slidably connected with the fixed base along a first direction. One end of the lifting base in a second direction comprises a top plate and a sleeve connected with the top plate. The sleeve extends along the second direction. The first direction is different from the second direction. The driving part is arranged on the fixed base and comprises a screw rod extending along the second direction. The screw rod cooperates with the sleeve to drive the lifting base to move along the second direction. The fixed base and the lifting base of the lifting assembly are arranged along the first direction, and the lifting direction of the lifting base is the second direction. When the lifting assembly is in a folded state, the projections of the fixed base and the lifting base in the first direction overlap. The arrangement mode makes the lifting assembly have a smaller size in the second direction when the lifting assembly is in the folded state.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more particularly to a lifting assembly and a medical bed. Background Technology

[0002] In the use of medical beds, such as vascular beds, patients need to lie on the bed while being imaged by medical instruments. The relative position between the patient and the medical instruments may need to be adjusted when imaging is performed in different body positions. Therefore, the medical bed needs to accommodate various imaging postures.

[0003] Some medical beds need to be able to be raised and lowered in height to change the distance between the patient and the ground, thereby meeting the imaging requirements of medical instruments. However, these medical beds cannot have a large height adjustment range while maintaining a low initial height. Utility Model Content

[0004] This application provides a lifting assembly and a medical bed to address some or all of the shortcomings of the related technologies.

[0005] The first aspect of this application provides a lifting assembly, including:

[0006] Fixed base;

[0007] A lifting base is slidably connected to the fixed base along a first direction; one end of the lifting base in a second direction includes a top plate and a sleeve connected to the top plate at one end; the sleeve extends along the second direction; the first direction is distinct from the second direction; and

[0008] A drive unit, disposed on the fixed base, includes a lead screw extending along the second direction; the lead screw cooperates with the sleeve to drive the lifting base to move along the second direction.

[0009] Furthermore, the lifting assembly also includes a guide rail portion; the fixed base includes a fixed cavity disposed in the first direction facing the lifting base; the lifting base includes a lifting cavity disposed in the first direction facing the fixed base; the guide rail portion is disposed in the fixed cavity and the lifting cavity, and is slidably connected to the lifting base and the fixed base respectively.

[0010] Furthermore, the guide rail includes a guide hole extending through in the second direction; the sleeve is disposed in the guide hole.

[0011] Furthermore, the lifting assembly also includes a plurality of roller sections; the plurality of roller sections are arranged along the second direction; wherein:

[0012] A plurality of the roller portions are disposed on the fixed base and extend into the fixed cavity; the roller portions are slidably connected to the guide rail portions; and / or,

[0013] Multiple rollers are disposed on the lifting base and extend into the lifting cavity; the rollers are slidably connected to the guide rail.

[0014] Furthermore, the roller portion is configured as a roller bearing.

[0015] Furthermore, the lifting assembly also includes a meshing part; the meshing part includes a fixed rack, a lifting rack, and a central gear; the fixed rack is disposed on the fixed base; the lifting rack is disposed on the lifting base; the central gear is disposed on the guide rail part; wherein, the central gear is disposed between the fixed rack and the lifting rack and meshes with the fixed rack and the lifting rack respectively.

[0016] Furthermore, the drive unit also includes a motor and a transmission unit; the drive shaft of the motor extends along the second direction and is disposed away from the top plate; the transmission unit connects the motor and the lead screw to transmit the torque of the motor to the lead screw.

[0017] Furthermore, the transmission unit includes a first transmission wheel, a second transmission wheel, and a belt; the first transmission wheel is connected to the drive shaft of the motor and is driven to rotate by the motor; the second transmission wheel is connected to the lead screw and rotates synchronously with the lead screw; the belt is sleeved on the first transmission wheel and the second transmission wheel.

[0018] Furthermore, the fixed base also includes a receiving cavity disposed away from the lifting base in the first direction; the motor is disposed in the receiving cavity.

[0019] A second aspect of this application provides a medical bed, including a bed board, a base, and the lifting assembly described in the foregoing embodiments; the fixed base is connected to the base; and the top plate is connected to the bed board.

[0020] Furthermore, the base includes a turntable; the turntable is rotatable about a rotation axis; the rotation axis extends along the second direction; and the fixed base is fixedly connected to the turntable.

[0021] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0022] As can be seen from the above embodiments, the fixed base and the lifting base of the lifting assembly of this application are arranged along a first direction, while the lifting direction of the lifting base is a second direction. When the lifting assembly is in the retracted state, the projections of the fixed base and the lifting base along the first direction overlap. This arrangement allows the lifting assembly to have a smaller size in the second direction when in the retracted state.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 The diagram shows an overall schematic representation of an embodiment of the lifting assembly of this application, wherein the lifting assembly is in a retracted state;

[0026] Figure 2 The diagram shows an overall schematic representation of an embodiment of the lifting assembly of this application, wherein the drive portion is disposed separately; Figure 2 The indicated price adjustment group is in an upward state;

[0027] Figure 3 Shown as Figure 2 A schematic diagram of the lifting assembly from another angle;

[0028] Figure 4 A partial cross-sectional schematic diagram is shown as an embodiment of the lifting assembly of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 Lifting assembly, 1 Fixed base, 11 Fixed cavity, 12 Receiving cavity, 2 Lifting base, 21 Top plate, 22 Sleeve, 23 Lifting cavity, 24 First connecting piece, 25 Second connecting piece, 26 Anti-rotation pin, 3 Drive unit, 31 Lead screw, 32 Motor, 33 Transmission unit, 331 First transmission wheel, 332 Second transmission wheel, 333 Belt, 4 Guide rail unit, 41 Guide hole, 5 Roller unit, 6 Meshing unit, 61 Fixed rack, 62 Lifting rack, 63 Center gear, 200 Turntable, X First direction, Z Second direction. Detailed Implementation

[0031] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0033] This application provides a medical bed (not shown). The medical bed includes a bed board, a base, and a lifting assembly.

[0034] refer to Figures 1 to 4 The lifting assembly 100 of this application includes a fixed base 1, a lifting base 2, and a drive unit 3. The lifting base 2 is slidably connected to the fixed base 1 along a first direction X. One end of the lifting base 2 in a second direction Z includes a top plate 21 and a sleeve 22 connected to the top plate 21 at one end. The sleeve 22 extends along the second direction Z. The drive unit 3 is disposed on the fixed base 1 and includes a lead screw 31 extending along the second direction Z. The lead screw 31 cooperates with the sleeve 22 to drive the lifting base 2 to move along the second direction Z. The fixed base 1 is connected to the base plate. The top plate 21 is connected to the bed board.

[0035] When the lead screw 31 rotates around its axis of rotation, the sleeve 22 can move along the second direction Z. Since one end of the sleeve 22 is connected to the top plate 21, the top plate 21 moves along the second direction Z under the drive of the sleeve 22. At this time, the lifting assembly 100 manifests as the lifting base 2 displacing in the second direction Z. With this arrangement, the medical bed can achieve the movement of the bed board away from or towards the base in the second direction Z under the action of the fixed base 1 and the lifting base 2. In this application, the fixed base 1 and the lifting base 2 are arranged along the first direction X, while the lifting direction of the lifting base 2 is the second direction Z. When the lifting assembly 100 is in the... Figure 1 In the retracted state, the projections of the fixed base 1 and the lifting base 2 in the first direction X overlap. This arrangement allows the lifting assembly 100 to have a smaller size in the second direction Z when retracted. Furthermore, the lead screw 31 ensures smooth movement of the lifting base 2 when the bed supports the patient's weight.

[0036] During the use of a medical bed, the lifting assembly 100 is usually in a retracted state to facilitate patients getting on and off the bed. However, the arrangement of the fixed base 1 and the lifting base 2 in this application results in a smaller dimension of the lifting assembly 100 in the second direction Z when it is in the retracted state. Therefore, the initial height of the bed can be controlled, making it easier for patients of different heights to get on and off the bed.

[0037] In the embodiment shown in the accompanying drawings, the first direction X and the second direction Z are perpendicular. The second direction Z can be understood as the height direction of the medical bed during use, so the first direction X can be any direction parallel to the ground. Furthermore, the first direction X and the second direction Z can be at any angle, such as 85° or 80°, as long as they are not parallel. This application does not limit this.

[0038] Because the lead screw 31 rotates, the sleeve 22 needs to remain stationary in the angular displacement direction relative to the lead screw 31 to ensure that the rotation of the lead screw 31 can be converted into movement of the sleeve 22 in the second direction Z. In some optional embodiments, the connection between the sleeve 22 and the top plate 21 can be a direct connection by welding. Or, as... Figure 4 As shown, the lifting assembly 100 includes a first connecting member 24, a second connecting member 25, and an anti-rotation pin 26. One end of the first connecting member 24 is inserted into the second connecting member 25. The anti-rotation pin 26 connects the first connecting member 24 and the second connecting member 25. Thus, the first connecting member 24 and the second connecting member 25 can remain relatively stationary in the rotational direction. The end of the first connecting member 24 away from the second connecting member 25 is inserted into the sleeve 22, which can be an interference fit, adhesive fit, etc. The end of the second connecting member 25 away from the first connecting member 24 is inserted into the opening of the top plate 21, and can be an interference fit, adhesive fit, welded, etc., with the top plate 21. With this arrangement, the length of the sleeve 22 in the second direction Z is controllable, while reducing the production and assembly precision requirements of the sleeve 22 and the top plate 21.

[0039] When the lifting assembly 100 is assembled between the bed board and the base, the weight of the bed board is transmitted to the drive unit 3 via the top plate 21. During the use of the medical bed, the top plate 21 also needs to bear the weight of the patient. When this weight deviates from the centerline of the lead screw 31, it may cause deformation of the lead screw 31, which in turn may prevent the lifting base 2 from moving along the second direction Z along the predetermined trajectory.

[0040] Optionally, the lifting assembly 100 further includes a guide rail portion 4. The fixed base 1 includes a fixed cavity 11 disposed in the first direction X facing the lifting base 2. The lifting base 2 includes a lifting cavity 23 disposed in the first direction X facing the fixed base 1. The guide rail portion 4 is disposed in the fixed cavity 11 and the lifting cavity 23, and is slidably connected to the lifting base 2 and the fixed base 1, respectively. In other words, the lifting base 2 and the fixed base 1 "clamp" the guide rail portion 4 in the middle. This arrangement can improve the structural compactness of the lifting assembly 100 and avoid the lifting assembly 100 occupying too much space in the first direction X. In addition, the arrangement of the guide rail portion 4 can improve the structural strength of the lifting assembly 100, while further ensuring the smoothness of the movement of the lifting base 2 in the second direction Z.

[0041] The guide rail portion 4 may, for example, be provided only on one side of the fixed cavity 11 and the lifting cavity 23. Alternatively, as shown in the attached figure, the guide rail portion 4 includes a guide hole 41 extending through along the second direction Z. The sleeve 22 is disposed in the guide hole 41. With this arrangement, the cross-sectional area of ​​the guide rail portion 4 is increased, thereby improving the overall structural strength of the guide rail portion 4. At the same time, the guide rail portion 4 with a larger cross-sectional area can be slidably connected to the lifting base 2 and the fixed base 1 on its four circumferential sides, respectively, further limiting its movement trajectory in the second direction Z, thereby ensuring the smooth movement of the lifting base 2.

[0042] To further improve the adjustment stroke of the lifting assembly 100 in the second direction Z, in some optional embodiments, the lifting assembly 100 further includes a meshing part 6. The meshing part 6 includes a fixed rack 61, a lifting rack 62, and a central gear 63. The fixed rack 61 is disposed on the fixed base 1. The lifting rack 62 is disposed on the lifting base 2. The central gear 63 is disposed on the guide rail part 4. The central gear 63 is disposed between the fixed rack 61 and the lifting rack 62 and meshes with both the fixed rack 61 and the lifting rack 62.

[0043] In this embodiment, when the lifting assembly 100 switches from the retracted state to the raised state, the lead screw 31 rotates, thereby driving the sleeve 22 to move along the second direction Z. At this time, under the drive of the sleeve 22, the top plate 21 is displaced along the second direction Z, which manifests as the lifting base 2 rising. The lifting rack 62 is disposed on the lifting base 2, so the lifting rack 62 and the central gear 63 move relative to each other. At this time, the lifting rack 62 drives the central gear 63 to rotate. Since the central gear 63 meshes with the fixed rack 61 after rotating, and the fixed rack 61 is disposed on the fixed base 1, the meshing of the central gear 63 and the fixed rack 61 manifests as the guide rail part 4 moving away from the fixed base 1 along the second direction Z.

[0044] As can be seen, the lifting assembly 100 in this embodiment is actually a multi-stage transmission structure. Under the combined action of the guide rail 4 and the engaging part 6, the highest adjustable height of the lifting assembly 100 can be the sum of the dimensions of the fixed base 1 and the lifting base 2 in the second direction Z, while the lowest position can be close to the dimension of the fixed base 1 in the second direction Z. Therefore, the lifting assembly 100 in this embodiment can have a small size in the retracted state, thereby ensuring a low starting height for the medical bed, while also having a large height adjustment stroke to meet the imaging position requirements of different medical instruments.

[0045] In the embodiment shown in the accompanying drawings, the number of meshing parts 6 is one, thereby reducing the accuracy requirements for the fit of the fixed rack 61, the central gear 63, and the lifting rack 62. In other embodiments, the number of meshing parts 6 may include two, and they are respectively disposed on the opposing surfaces of the fixed base 1 and the lifting base 2.

[0046] In some optional embodiments, the lifting assembly 100 further includes a plurality of roller portions 5. The plurality of roller portions 5 are arranged along a second direction Z. Optionally, the plurality of roller portions 5 are disposed on the fixed base 1 and extend into the fixed cavity 11. The roller portions 5 are slidably connected to the guide rail portion 4. Compared to embodiments where the fixed base 1 engages with the guide rail portion 4 through protrusions or mating, the roller portions 5 convert surface contact into point contact, thereby reducing the friction between the fixed base 1 and the guide rail portion 4 during relative movement. This arrangement improves the smoothness of movement between the fixed base 1 and the guide rail portion 4 while ensuring the service life of the lifting assembly 100.

[0047] Furthermore, the roller portion 5 extends into the fixed cavity 11 and cooperates with the guide rail portion 4, thus the roller portion 5 can actually play a limiting role. For example, in Figure 4 In the view shown, the roller portion 5, disposed on the surface of the fixed base 1, extends perpendicularly to the first direction X and the second direction Z into the fixed cavity 11 and engages with the guide rail portion 4. Therefore, the roller portion 5 on this surface can limit the displacement of the guide rail portion 4 in the first direction X. Thus, combined with... Figure 3 In the illustrated embodiment, the roller portion 5 on the surface of the fixed base 1 perpendicular to the first direction X can restrict the displacement of the guide rail portion 4 in directions perpendicular to the first direction X and the second direction Z. This arrangement further ensures that the guide rail portion 4 can only move along the second direction Z, thereby ensuring the guiding effect of the guide rail portion 4 on the lifting assembly 100.

[0048] Similarly, multiple roller sections 5 can be provided on the lifting base 2 and extend into the lifting cavity 23. The roller sections 5 are slidably connected to the guide rail section 4. The roller sections 5 provided on the lifting base 2 can reduce the friction between the lifting base 2 and the guide rail section 4, thereby ensuring the service life of the lifting base 2 and the guide rail section 4 and the smoothness of movement.

[0049] In the embodiment shown in the accompanying drawings, both the fixed base 1 and the lifting base 2 are provided with roller portions 5. This arrangement ensures the smoothness of the movement of the guide rail portion 4 relative to the fixed base 1 and the lifting base 2. However, it should be understood that the roller portions 5 may be provided only on the fixed base 1 or only on the lifting base 2. This application is not limited in this regard. Furthermore, in the embodiment shown in the accompanying drawings, the fixed base 1 and the lifting base 2 are both provided with roller portions 5 on surfaces parallel to the second direction Z, thereby limiting the displacement of the guide rail portion 4 in the direction perpendicular to the second direction Z and ensuring the guiding function of the guide rail portion 4 as much as possible. However, it should be understood that the number of surfaces on which the roller portions 5 are provided can be reduced, and the number of roller portions 5 provided on each surface can be more or less. This application is not limited in this regard.

[0050] In some optional embodiments, the roller portion 5 is configured as a roller bearing. Since the roller bearing is a standard component, it facilitates the replacement and renewal of the roller portion 5 after prolonged use of the lifting assembly 100, thereby reducing the maintenance cost of the lifting assembly 100. Furthermore, the roller bearing can minimize friction between the lifting base 2 and the guide rail 4, or between the fixed base 1 and the guide rail 4, during relative movement, thereby improving the smoothness of position changes of the lifting assembly 100 in the second direction Z.

[0051] The drive unit 3 also includes a motor 32. The motor 32 can be directly connected to the lead screw 31 along the second direction Z, thereby driving the rotation of the lead screw 31. In order to reduce the space required by the lifting unit in the second direction Z, in some embodiments, the drive axis of the motor 32 extends along the second direction Z, and the drive axis of the motor 32 is set away from the top plate 21. In order to realize the torque transmission of the drive axis, the drive unit 3 also includes a transmission unit 33. The transmission unit 33 connects the motor 32 and the lead screw 31 to transmit the torque of the motor 32 to the lead screw 31. With this arrangement, the motor 32 and the lead screw 31 can be arranged in a direction perpendicular to the second direction Z, such as the first direction X shown in the figure. Based on this, the drive axis of the motor 32 is set away from the top plate 21, that is, the main body of the motor 32, the lifting base 2, and the fixed base 1 have a projection overlap in the connection direction of the motor 32 and the lead screw 31. In this way, the lifting assembly 100 can avoid the presence of the drive unit 3 causing the lifting assembly 100 to be too large in the second direction Z.

[0052] The transmission unit 33 can be driven by multiple gears. Alternatively, in some optional embodiments, the transmission unit 33 includes a first transmission wheel 331, a second transmission wheel 332, and a belt 333. The first transmission wheel 331 is connected to the drive shaft of the motor 32 and is driven to rotate by the motor 32. The second transmission wheel 332 is connected to the lead screw 31 and rotates synchronously with the lead screw 31. The belt 333 is fitted onto the first transmission wheel 331 and the second transmission wheel 332. The belt 333 has good elasticity and can absorb the impact and vibration from the motor 32, thereby improving the smoothness of the transmission unit 33. Furthermore, because the belt 333 is in flexible contact with the first transmission wheel 331 and the second transmission wheel 332, the noise generated during the operation of the transmission unit 33 can be controlled.

[0053] Furthermore, when the top plate 21 is subjected to excessive load, the torque generated by the motor 32 is insufficient to drive the lifting assembly 100 to displace along the second direction Z. This manifests as the first transmission wheel 331 rotating while the second transmission wheel 332 remains stationary, causing the belt 333 to slip. Therefore, the slippage of the belt 333 protects the motor 32, preventing overload and damage.

[0054] In an optional embodiment, the first drive wheel 331 and the second drive wheel 332 may be driven by a synchronous belt or by a chain. The application is not limited in this respect.

[0055] In some optional embodiments, the fixed base 1 further includes a receiving cavity 12 disposed away from the lifting base 2 in the first direction X. The motor 32 is disposed in the receiving cavity 12. By providing the receiving cavity 12, the dimensions of the fixed base 1 and the motor 32 in the direction perpendicular to the second direction Z can also be effectively controlled, thereby controlling the spacing between the components of the lifting assembly 100 and optimizing the overall volume of the lifting assembly 100. Furthermore, since the lead screw 31 is located between the fixed base 1 and the lifting base 2, placing the motor 32 as close as possible to the fixed base 1 can reduce the spacing between the motor 32 and the lead screw 31. In this way, the volume of the transmission unit 33 and the number of transmission parts can be controlled, thereby controlling the production cost of the lifting assembly 100.

[0056] To enrich the variations of the medical bed in this application, in some optional embodiments, the base includes a turntable 200. The turntable 200 is rotatable about a rotation axis. The rotation axis extends along a second direction Z. The fixed base 1 is fixedly connected to the turntable 200. Thus, the turntable 200 can drive the lifting assembly 100 to rotate around the rotation axis. In this embodiment, the height of the medical bed in the second direction Z can change, and its position around the rotation axis can also change. This arrangement allows the medical bed to meet more positional requirements of medical instruments.

[0057] It should be noted that the connection between the base and the fixed base 1 can be achieved through an indirect connection or a direct connection. Similarly, the connection between the lifting base 2 and the bed board can be achieved through a direct connection between the top plate 21 and the bed board, or through an indirect connection. For example, a swing assembly for changing the angle between the bed board and the ground can also be provided between the top plate 21 and the bed board. This application is not limited in this respect.

[0058] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A lifting assembly, characterized in that, include: Fixed base (1); A lifting base (2) is slidably connected to the fixed base (1) along a first direction (X); one end of the lifting base (2) in a second direction (Z) includes a top plate (21) and a sleeve (22) connected to the top plate (21) at one end; the sleeve (22) extends along the second direction (Z); the first direction (X) is different from the second direction (Z); as well as The drive unit (3) is disposed on the fixed base (1) and includes a lead screw (31) extending along the second direction (Z); the lead screw (31) cooperates with the sleeve (22) to drive the lifting base (2) to move along the second direction (Z).

2. The lifting assembly according to claim 1, characterized in that, The lifting assembly (100) further includes a guide rail (4); the fixed base (1) includes a fixed cavity (11) disposed in the first direction (X) facing the lifting base (2); the lifting base (2) includes a lifting cavity (23) disposed in the first direction (X) facing the fixed base (1); the guide rail (4) is disposed in the fixed cavity (11) and the lifting cavity (23), and is slidably connected to the lifting base (2) and the fixed base (1) respectively.

3. The lifting assembly according to claim 2, characterized in that, The guide rail (4) includes a guide hole (41) extending along the second direction (Z); the sleeve (22) is disposed in the guide hole (41).

4. The lifting assembly according to claim 2, characterized in that, The lifting assembly (100) further includes a plurality of roller sections (5); the plurality of roller sections (5) are arranged along the second direction (Z); wherein: Multiple roller portions (5) are disposed on the fixed base (1) and extend into the fixed cavity (11); the roller portions (5) are slidably connected to the guide rail portion (4); and / or, Multiple roller sections (5) are disposed on the lifting base (2) and extend into the lifting cavity (23); the roller sections (5) are slidably connected to the guide rail section (4).

5. The lifting assembly according to claim 4, characterized in that, The roller section (5) is configured as a roller bearing.

6. The lifting assembly according to claim 2, characterized in that, The lifting assembly (100) further includes a meshing part (6); the meshing part (6) includes a fixed rack (61), a lifting rack (62) and a central gear (63); the fixed rack (61) is disposed on the fixed base (1); the lifting rack (62) is disposed on the lifting base (2); the central gear (63) is disposed on the guide rail part (4); wherein, the central gear (63) is disposed between the fixed rack (61) and the lifting rack (62) and meshes with the fixed rack (61) and the lifting rack (62) respectively.

7. The lifting assembly according to claim 1, characterized in that, The drive unit (3) further includes a motor (32) and a transmission unit (33); the drive axis of the motor (32) extends along the second direction (Z), and the drive axis of the motor (32) is disposed away from the top plate (21); the transmission unit (33) connects the motor (32) and the lead screw (31) to transmit the torque of the motor (32) to the lead screw (31).

8. The lifting assembly according to claim 7, characterized in that, The transmission unit (33) includes a first transmission wheel (331), a second transmission wheel (332), and a belt (333); the first transmission wheel (331) is connected to the drive shaft of the motor (32) and is driven to rotate by the motor (32); the second transmission wheel (332) is connected to the lead screw (31) and rotates synchronously with the lead screw (31); the belt (333) is sleeved on the first transmission wheel (331) and the second transmission wheel (332).

9. The lifting assembly according to claim 7, characterized in that, The fixed base (1) further includes a receiving cavity (12) disposed away from the lifting base (2) in the first direction (X); the motor (32) is disposed in the receiving cavity (12).

10. A medical bed, characterized in that, It includes a bed board, a base, and a lifting assembly as described in any one of claims 1-9; the fixed base (1) is connected to the base; and the top plate (21) is connected to the bed board.

11. The medical bed according to claim 10, characterized in that, The base includes a turntable (200); the turntable (200) is rotatable about a rotation axis; the rotation axis extends along the second direction (Z); the fixed base (1) is fixedly connected to the turntable (200).

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