Radiotherapy bed

Abstract

The utility model discloses a radiotherapy bed, which relates to the technical field of radiotherapy equipment and comprises a base connected with a bed body through a lifting assembly. The transverse driving assembly comprises a fixed rack; the output end of the first driving motor is connected with a ball screw through a synchronous belt, and the ball screw is in transmission connection with the base; the support adjusting assembly comprises a fixed seat; the lower end of the supporting shaft is rotatably connected with the fixing base, the upper end of the supporting shaft is rotatably connected with a supporting base, and the supporting base is slidably connected with the base. According to the radiotherapy bed, the technical problem that an existing radiotherapy bed is prone to being stuck under the pushing of single-side driving force is solved, the two ends of the supporting shaft are rotationally connected with the fixing base and the supporting base respectively, and the whole radiotherapy bed is pushed by the single-side driving force, so that the whole radiotherapy bed is more stable and reliable. The pitching angle and the rotating angle of the supporting seat relative to the fixed seat can be correspondingly adjusted, and the phenomenon that the radiotherapy bed is stuck is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of radiotherapy equipment, in particular to a radiotherapy bed. Background Art

[0002] In the field of radiotherapy, a circular-shaped radiotherapy couch typically features three degrees of freedom (DOF) in the X, Y, and Z directions, providing patient support and positioning. Traditional radiotherapy couches typically design the X-axis at the top of the couch. This placement of the X-axis extends the lateral motion, creating a cantilever structure with significant deformation.

[0003] However, placing X-axis motion on the base of a radiotherapy couch takes up a lot of space, especially when the two guide rails are spaced far apart. Driven by a single-sided driving force, the X-axis motion of the radiotherapy couch is poorly guided and prone to jamming. Therefore, a radiotherapy couch is proposed to address this issue. Utility Model Content

[0004] The purpose of the utility model is to provide a radiotherapy couch, which solves the technical problem that when the X-axis movement of the existing radiotherapy couch is arranged on the radiotherapy couch base, the space occupied is large, and in particular, the two guide rails are arranged at a relatively large distance. Under the drive of a unilateral driving force, the guidance of the X-axis movement of the radiotherapy couch is poor, and the couch is prone to getting stuck.

[0005] To achieve the above-mentioned purpose, the present invention provides a radiotherapy couch, comprising:

[0006] A base, the base being connected to the bed body via a lifting assembly, a transverse driving assembly being provided at a first end of the base, and a support adjustment assembly being provided at a second end of the base;

[0007] The lateral drive assembly comprises:

[0008] Fixed rack;

[0009] A first drive motor is provided on the fixed frame, wherein an output end of the first drive motor is connected to a ball screw via a synchronous belt, the ball screw is transmission-connected to a transverse motion seat, and the transverse motion seat is connected to the base;

[0010] The support adjustment assembly includes:

[0011] Fixed seat;

[0012] A support shaft, wherein the lower end of the support shaft is rotatably connected to the fixing seat, the upper end of the support shaft is rotatably connected to the support seat, and the support seat is slidably connected to the base.

[0013] Preferably, the lifting assembly comprises:

[0014] a first support frame, wherein the lower end of the first support frame is rotatably connected to the base, the upper end of the first support frame is rotatably connected to a first sliding seat, and the first sliding seat is slidably connected to the bed body;

[0015] A second support frame, the second support frame is hingedly connected to the first support frame, the lower end of the second support frame is rotatably connected to the second sliding seat, the second sliding seat is slidably connected to the bed body, the upper end of the second support frame is rotatably connected to the bed body, and the top surface of the second sliding seat is provided with an assembly plate;

[0016] The second driving motor is arranged on the top surface of the base. The output end of the first driving motor is connected to a transmission screw, and the transmission screw is threadedly connected to the assembly plate.

[0017] Preferably, a plurality of limiting rods are provided on the top surface of the base, and each of the limiting rods is perpendicular to the top surface of the base.

[0018] Preferably, an assembly groove is provided on the bottom surface of the support seat, and a bearing component is provided in the assembly groove, and the bearing component includes: a first joint bearing, the top surface of the first joint bearing abuts the second joint bearing, the rotation center of the first joint bearing and the second joint bearing is the same, and the first joint bearing and the second joint bearing are sequentially sleeved on the upper end of the support shaft from top to bottom.

[0019] Preferably, a first linear guide rail is provided on the side of the fixed frame, and a first guide rail frame is provided on the left side of the transverse motion seat, and the first guide rail frame is slidably connected to the first linear guide rail.

[0020] Preferably, a second linear guide rail is provided at the second end of the bed, a second guide rail frame is provided on the left side of the support seat, and the second guide rail frame is slidably connected to the second linear guide rail.

[0021] Preferably, a connecting plate is provided on the top surface of the transverse motion seat, the connecting plate is connected to an assembly block, and the assembly block is threadedly connected to the ball screw.

[0022] Preferably, a first wire-drawing encoder is provided on the fixed frame, and the first wire-drawing encoder is used to measure the moving distance of the transverse motion seat.

[0023] Preferably, a rotary encoder is provided on the fixed frame, and the rotary encoder is used to measure the rotation speed and number of rotations of the ball screw.

[0024] Preferably, a plurality of limit switches are symmetrically arranged on the fixed frame, and the limit switches are used to limit the distance that the transverse motion seat moves along the axial direction of the ball screw.

[0025] Compared to the above-mentioned background technology, the present invention provides a radiotherapy couch having the following beneficial effects: a first drive motor drives a ball screw to rotate, which in turn drives the radiotherapy couch to move via a transverse motion seat. By rotatably connecting the two ends of the support shaft to the fixed seat and the support seat, respectively, the support seat has a multi-degree-of-freedom adjustment range relative to the fixed seat. This ensures that the radiotherapy couch, under the drive of a unilateral driving force, provides a universal support point for the other end of the radiotherapy couch. Even if the radiotherapy couch is deflected relative to the support seat, the support seat can always slide freely relative to the end of the radiotherapy couch, effectively preventing jamming and making the overall translational movement of the radiotherapy couch smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 A three-dimensional structural diagram of a radiotherapy couch provided in an embodiment of the present utility model;

[0028] Figure 2 A three-dimensional structural diagram of a transverse drive assembly provided in an embodiment of the present utility model;

[0029] Figure 3 for Figure 1 A magnified schematic diagram of point A in the middle;

[0030] Figure 4 A schematic cross-sectional view of a support adjustment assembly provided by an embodiment of the present utility model;

[0031] Figure 5 for Figure 2 A magnified schematic diagram of point B in the middle;

[0032] Figure 6 This is a three-dimensional structural diagram of the base provided by an embodiment of the utility model.

[0033] Specifically, 1-fixed frame; 2-base; 3-bed; 4-first drive motor; 5-ball screw; 6-lateral motion seat; 7-fixed seat; 8-support shaft; 9-support seat; 10-second sliding seat; 11-first support frame; 12-second support frame; 13-first sliding seat; 14-transmission screw; 15-assembly plate; 16-limit rod; 17-first joint bearing; 18-second joint bearing; 19-first linear guide; 20-first guide frame; 21-second linear guide; 22-second guide frame; 23-connecting plate; 24-first wire encoder; 2401-first wire; 25-rotary encoder; 26-limit switch; 27-second wire; 28-rotating shaft; 29-mounting plate. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0036] like Figure 1 As shown, to achieve the above objectives, the present invention provides a radiotherapy couch, comprising: a fixed frame 1 and a fixed base 7 disposed at both ends of a base 2. Specifically, the base 2 is connected to the bed 3 via a lifting assembly, a transverse drive assembly is disposed at the left end of the base 2, and a support adjustment assembly is disposed at the right end of the base 2.

[0037] like Figure 2 As shown, the transverse drive assembly includes: a fixed frame 1 and a first drive motor 4 arranged on the fixed frame 1. The output end of the first drive motor 4 is connected to the ball screw 5 through a synchronous belt. The ball screw 5 is rotatably connected to the fixed frame 1. Specifically, two rolling bearings are provided on the inner side of the fixed frame 1. The two rolling bearings are respectively mounted on the two ends of the ball screw 5. The ball screw 5 is connected to the transverse motion seat 6 through the transmission of the ball screw 5. The transverse motion seat 6 is connected to the base 2. Preferably, two mounting plates 29 are symmetrically provided on the left end surface of the base 2, as shown in FIG. Figure 6 As shown, each mounting plate 29 is connected to the right side surface of the transverse motion seat 6 via a plurality of bolts, thereby fixing the transverse motion seat 6 to the left end surface of the base 2 .

[0038] like Figure 3 and Figure 4As shown, the support adjustment assembly includes: a fixed seat 7 and a support shaft 8 arranged on the fixed seat 7. Specifically, the lower end of the support shaft 8 is rotatably connected to the fixed seat 7, and the upper end of the support shaft 8 is rotatably connected to the support seat 9. At the same time, the support seat 9 is slidably connected to the base 2.

[0039] During use, the first drive motor 4 drives the ball screw 5 to rotate, and the ball screw 5 cooperates with the transverse motion seat 6 and drives the transverse motion seat 6 to move along the axial direction of the ball screw 5. The transverse motion seat 6 drives the radiotherapy bed to move, and the right end of the radiotherapy bed moves relative to the support seat 9. By rotatably connecting the two ends of the support shaft 8 to the fixed seat 7 and the support seat 9 respectively, the support seat 9 has a multi-degree-of-freedom adjustment range relative to the fixed seat 7. Under the drive of the unilateral driving force, the radiotherapy bed provides a universal support point for the right end of the radiotherapy bed. The support seat 9 always slides freely relative to the end of the radiotherapy bed to prevent it from getting stuck.

[0040] The lifting assembly includes a first support frame 11 and a second support frame 12 mounted on the base 2. The lower end of the first support frame 11 is hingedly connected to the base 2, and the upper end of the first support frame 11 is hingedly connected to a first sliding seat 13, which is slidably connected to the bed 3. The second support frame 12 is hingedly connected to the first support frame 11, and the lower end of the second support frame 12 is hingedly connected to a second sliding seat 10, which is slidably connected to the bed 3. Furthermore, a second drive motor is mounted on the top surface of the base 2. The output end of the first drive motor 4 is connected to a drive screw 14, which is threadedly connected to an assembly plate 15, which is mounted on the top surface of the second sliding seat 10. When the bed body 3 needs to be raised, the second drive motor drives the transmission screw 14 to rotate forward, and the transmission screw 14 cooperates with the assembly plate 15 to drive the second sliding seat 10 to move along the axial direction of the transmission screw 14. The first sliding seat 13 gradually approaches the upper end of the second support frame 12, and the second sliding seat 10 gradually approaches the lower end of the first support frame 11 until the bed body 3 is raised to the specified height position.

[0041] It should be noted that the axial direction of the transmission screw 14 is consistent with the length direction of the base 2, and the right end of the transmission screw 14 is rotatably connected to the mounting seat, and the mounting seat is fixed on the top surface of the base 2. The right end of the transmission screw 14 is auxiliary supported by the mounting seat to ensure the stability of the transmission screw 14 during operation.

[0042] In one embodiment of the present invention, a plurality of limit rods 16 are provided on the top surface of the base 2. When the bed 3 is lowered to a certain height, the bottom surface of the bed 3 will first contact the top surface of the limit rod 16. Specifically, each limit rod 16 is perpendicular to the top surface of the base 2. A first pressure sensor (not shown in the figure) is provided on the top surface of each limit rod 16. When the first pressure sensor detects the pressure change on the limit rod 16, it sends a signal to the control system that the bed 3 has reached the minimum limited height. The control system sends a signal to the second drive motor to stop operation to prevent the bed 3 from further descending and causing damage to the lifting assembly.

[0043] It should be noted that when the bottom surface of the bed 3 contacts the top surface of the limit rod 16, the second sliding seat 10 can still move a distance toward the lower end of the first support frame 11, and the right end of the transmission screw 14 is set with a smooth surface of a certain distance along the axis direction of the transmission screw 14 (not shown in the figure), that is, the second sliding seat 10 is at a certain safety buffer distance. After the limit rod 16 fails to limit, the second drive motor continues to drive the second sliding seat 10 to move for a distance, and the transmission screw 14 stops driving the second sliding seat 10 to move, and it still does not damage the overall structure of the overall lifting assembly, thereby protecting the first support frame 11, the second support frame 12 and the second sliding seat 10.

[0044] In addition, a second cable encoder is provided on the base 2. The second cable encoder is connected to the bottom surface of the bed 3 via a second cable 27. The height of the bed 3 is accurately measured by the unwinding length of the second cable 27, thereby accurately adjusting the position of the bed 3. In the prior art, cable encoders are a relatively mature technology, and their specific structure and working principle will not be described in detail.

[0045] In one embodiment of the present invention, an assembly groove is provided on the bottom surface of the support seat 9, and a bearing component is provided in the assembly groove. The bearing component includes: a first joint bearing 17, the top surface of the first joint bearing 17 abuts the second joint bearing 18, the first joint bearing 17 and the second joint bearing 18 have the same rotation center, and the first joint bearing 17 and the second joint bearing 18 are sequentially sleeved on the upper end of the support shaft 8 from top to bottom. At this time, the support seat 9 can freely rotate relative to the support shaft 8 at a certain angle with the axis of the support shaft 8 as the axis center. At the same time, an assembly groove is provided on the top surface of the fixed seat 7, and a rotating shaft 28 is provided in the assembly groove. The rotating shaft 28 is hingedly connected to the lower end of the support shaft 8. When the height of the left end of the radiotherapy bed is inconsistent with the height of the right end of the radiotherapy bed and the left end of the radiotherapy bed is deflected by a certain angle relative to the right end of the radiotherapy bed, the support seat 9 can adjust the pitch angle relative to the fixed seat 7 accordingly, thereby ensuring that the support seat 9 can always slide freely relative to the end of the radiotherapy bed, preventing the radiotherapy bed from getting stuck relative to the support seat 9 or the fixed frame 1.

[0046] In addition, a fixing plate is provided on the bottom surface of the support seat 9, which is fixed to the bottom surface of the assembly groove by a number of bolts, and is used to seal the first joint bearing 17 and the second joint bearing 18 in the assembly groove, while ensuring that the first joint bearing 17 and the second joint bearing 18 can fit tightly, thereby improving the stability of the support seat 9.

[0047] like Figure 1 and Figure 5 As shown, it should be noted that a first linear guide 19 is provided on the side of the fixed frame 1, and a first guide rail frame 20 is provided on the left side of the transverse motion seat 6. The first guide rail frame 20 is slidably connected to the first linear guide 19. Specifically, a first slide groove is provided on the left side of the first guide rail frame 20, and the first linear guide 19 is slidably connected to the first slide groove. The first guide rail frame 20 and the first linear guide 19 are slidably matched to define and correct the movement path of the base 2, thereby effectively improving the stability and displacement accuracy of the overall movement of the radiotherapy bed.

[0048] In addition, a second linear guide rail 21 is provided at the right end of the base 2, and the second linear guide rail 21 is slidably connected to the support seat 9. A second guide rail frame 22 is provided on the left side of the support seat 9, and the second guide rail frame 22 is slidably connected to the second linear guide rail 21. Preferably, a card slot is provided at the right end of the base 2, and the second linear guide rail 21 is card-connected in the card slot and fixed by multiple bolts. The second guide rail frame 22 slides with the second linear guide rail 21 to limit and correct the movement path of the base 2, thereby further improving the stability and displacement accuracy of the overall movement of the radiotherapy bed.

[0049] In one embodiment of the present utility model, a connecting plate 23 is provided on the top surface of the transverse motion seat 6, the connecting plate 23 is connected to the assembly block, and the assembly block is threadedly connected to the ball screw 5. It should be noted that a threaded hole is provided on the side of the assembly block, and the threaded hole is coaxially arranged with the ball screw 5. When the ball screw 5 rotates forward and reverse, the threaded hole cooperates with the ball screw 5, and the assembly block reciprocates in the axial direction of the ball screw 5, thereby driving the radiotherapy bed to translate.

[0050] It should be noted that an assembly frame is set on the fixed frame 1, and the assembly frame is used to fix the first wire encoder 24. The first wire encoder 24 is connected to the wire fixing frame through the first wire 2401. The wire fixing frame is set on the connecting plate 23. Specifically, a positioning plate is set on the surface of the assembly block, and the right end of the wire is fixed to the assembly block by bolt connection. The moving distance of the transverse motion seat 6, that is, the translation distance of the radiotherapy bed, is accurately measured by the unwinding length of the first wire 2401, so that the position state of the base 2 can be accurately adjusted.

[0051] Furthermore, a rotary encoder 25 is mounted on the fixed frame 1. This encoder measures the number of revolutions of the ball screw 5 and, in conjunction with the first cable encoder 24, assists in measuring the translation distance of the radiotherapy couch, further enhancing the reliability of data detection. Even if either the rotary encoder 25 or the first cable encoder 24 fails, the position of the radiotherapy couch can still be accurately adjusted. Furthermore, the rotary encoder 25 measures the rotational speed of the ball screw 5, enabling medical personnel to precisely adjust the speed of the base 2, preventing the couch from moving too quickly and causing discomfort to the patient.

[0052] In one embodiment of the present invention, a plurality of limit switches 26 are symmetrically disposed on the fixed frame 1. The limit switches 26 are used to limit the distance that the transverse motion seat 6 can move along the axis of the ball screw 5. Specifically, two limit switches 26 are provided, symmetrically disposed at either end of the fixed frame 1. Preferably, a second pressure sensor (not shown) is disposed on the side of the limit switch 26. When the end surface of the transverse motion seat 6 abuts the second pressure sensor on one of the limit switches 26, the second pressure sensor signals the control system that the bed 3 has reached its translational limit. The control system then signals the first drive motor 4 to stop operation, preventing further translation of the bed 3 that could damage the ball screw 5, the transverse motion seat 6, and the limit switches 26. This serves to protect the entire transverse drive assembly.

[0053] In one embodiment of the present invention, a plurality of support legs are arranged in an array on the bottom surface of the base 2. These legs can be extended to a certain length. When the radiotherapy couch is moved to a set position, a control system controls the extension of the legs, replacing the support provided by the fixed frame and the fixed base 7, thereby increasing the overall stability of the couch. Furthermore, a level sensor is provided on the top surface of the base 2. The length of each support leg is adjusted based on the detection signal from the level sensor until the base 2 is detected to be level.

[0054] When the present invention is in use, the first drive motor 4 drives the ball screw 5 to rotate, the ball screw 5 drives the lateral motion seat 6, and the lateral motion seat 6 drives the radiotherapy bed to move synchronously until the base 2 is translated to a specified position, and the second drive motor drives the transmission screw 14 to rotate forward, and the transmission screw 14 drives the second sliding seat 10 to move along the axial direction of the transmission screw 14 and gradually approach the lower end of the first support frame 11 until the bed body 3 is raised to a specified height position.

[0055] In summary, by rotatably connecting the two ends of the support shaft 8 to the fixed base 7 and the support base 9 respectively, the support base 9 has a multi-degree-of-freedom adjustment range relative to the fixed base 7. Under the drive of the unilateral driving force, the radiotherapy bed provides a universal support point for the right end of the radiotherapy bed. The support base 9 can adjust the pitch angle and rotation angle relative to the fixed base 7 accordingly, effectively preventing the radiotherapy bed from getting stuck relative to the support base 9 or the fixed frame 1.

[0056] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0057] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A radiotherapy couch, characterized in that: include: A base, the base being connected to the bed body via a lifting assembly, a transverse driving assembly being provided at a first end of the base, and a support adjustment assembly being provided at a second end of the base; The lateral drive assembly comprises: Fixed rack; A first drive motor is provided on the fixed frame, wherein an output end of the first drive motor is connected to a ball screw via a synchronous belt, the ball screw is transmission-connected to a transverse motion seat, and the transverse motion seat is connected to the base; The support adjustment assembly includes: Fixed seat; A support shaft, wherein the lower end of the support shaft is rotatably connected to the fixing seat, the upper end of the support shaft is rotatably connected to the support seat, and the support seat is slidably connected to the base.

2. The radiotherapy couch according to claim 1, wherein: The lifting assembly comprises: a first support frame, wherein the lower end of the first support frame is rotatably connected to the base, the upper end of the first support frame is rotatably connected to a first sliding seat, and the first sliding seat is slidably connected to the bed body; A second support frame, the second support frame is hingedly connected to the first support frame, the lower end of the second support frame is rotatably connected to the second sliding seat, the second sliding seat is slidably connected to the bed body, the upper end of the second support frame is rotatably connected to the bed body, and the top surface of the second sliding seat is provided with an assembly plate; The second driving motor is arranged on the top surface of the base. The output end of the first driving motor is connected to a transmission screw, and the transmission screw is threadedly connected to the assembly plate.

3. The radiotherapy couch according to claim 2, wherein: The top surface of the base is provided with a plurality of limiting rods, and each of the limiting rods is perpendicular to the top surface of the base.

4. A radiotherapy couch according to any one of claims 1 to 3, characterized in that: The bottom surface of the support seat is provided with an assembly groove, and a bearing component is provided in the assembly groove. The bearing component includes: a first joint bearing, the top surface of the first joint bearing abuts the second joint bearing, the rotation center of the first joint bearing and the second joint bearing is the same, and the first joint bearing and the second joint bearing are sequentially sleeved on the upper end of the support shaft from top to bottom.

5. The radiotherapy couch according to claim 4, characterized in that: A first linear guide rail is provided on the side of the fixed frame, and a first guide rail frame is provided on the left side of the transverse motion seat. The first guide rail frame is slidably connected to the first linear guide rail.

6. The radiotherapy couch according to claim 5, characterized in that: A second linear guide rail is provided at the second end of the bed body, and a second guide rail frame is provided on the left side of the support seat. The second guide rail frame is slidably connected to the second linear guide rail.

7. A radiotherapy couch according to any one of claims 1 to 3, characterized in that: A connecting plate is provided on the top surface of the lateral motion seat, the connecting plate is connected to an assembly block, and the assembly block is threadedly connected to the ball screw.

8. The radiotherapy couch according to claim 7, characterized in that: A first wire-drawing encoder is provided on the fixed frame, and the first wire-drawing encoder is used to measure the moving distance of the transverse motion seat.

9. The radiotherapy couch according to claim 8, characterized in that: A rotary encoder is provided on the fixed frame, and the rotary encoder is used to measure the rotation speed and the number of rotations of the ball screw.

10. The radiotherapy couch according to claim 9, characterized in that: A plurality of limit switches are symmetrically arranged on the fixed frame, and the limit switches are used to limit the distance that the transverse motion seat moves along the axial direction of the ball screw.

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