CN109303983B - A medical accelerator treatment bed - Google Patents

Abstract

The invention provides a medical accelerator treatment bed, comprising: the bed board is used for bearing a patient; the transverse driving mechanism, the longitudinal driving mechanism and the vertical lifting mechanism are respectively used for driving the bed board to move forwards and backwards, leftwards and rightwards and upwards and downwards; the longitudinal side-turning fine tuning mechanism is used for driving the bed board to longitudinally rotationally fine-tune in a left-right isocentric manner; and the transverse pitching fine tuning mechanism is used for driving the bed board to rotationally fine-tune in the transverse front-back isocenter. The medical accelerator treatment bed can realize multidimensional movement, rollover and pitching fine adjustment correction and accurate positioning, and has the advantages of simple structure, small whole machine volume and stable operation.

Description

A medical accelerator treatment bed

Technical Field

The invention relates to the field of radiotherapy equipment, and in particular to a medical accelerator treatment couch.

Background technique

With the popularization of radiotherapy, doctors can accurately position the patient's diseased part during radiotherapy and perform corresponding radiotherapy on the lesion through the three-dimensional images provided, thereby reducing damage to other normal tissues.

The treatment bed can achieve four-dimensional motion in the XYZ directions and orbiting around the isocenter through a medical accelerator treatment bed lifting system with application number 201520811586.X and a three-dimensional treatment bed of a radiotherapy system with application number 200520119822.8.

Among them, the cantilever structure of application number 201520811586.X cannot correct the elastic deformation of the bed board at the isocenter due to uneven force on the left and right sides of the bed board.

The three-dimensional treatment bed of a radiotherapy system with application number 200520119822.8,

The Chinese patent application number 200520119822.8 discloses a three-dimensional treatment bed of a radiotherapy system, wherein a lifting mechanism, a lateral movement mechanism and a longitudinal movement mechanism are arranged between the base and the treatment bed, wherein the lateral movement mechanism is a movable bracket arranged on the base, and the lifting mechanism is arranged on two bracket arms of the bracket, and a linear motion mechanism connected to the treatment bed is arranged on the lifting mechanism. Since the bracket of the lateral movement mechanism of the treatment bed is arranged on the base, and the lifting mechanism is supported on both sides of the treatment bed through the linear motion mechanism, the elastic deformation caused by the uneven force on the left and right sides of the bed board can be adjusted by adjusting the lifting amplitude difference of the lifting mechanisms on both sides. However, when the bed board moves forward and backward, due to the rigidity of the bed board itself, the error caused by the elastic deformation of the bed board at the isocenter cannot be corrected in a four-degree-of-freedom bed, and it is urgently needed to be improved.

Summary of the invention

In order to solve the above problems, the present invention provides a medical accelerator treatment bed. The medical accelerator treatment bed of the present invention can realize multi-dimensional movement, realize rollover and pitch fine-tuning correction, realize precise positioning, and has the beneficial effects of simple structure, small overall size and stable operation.

In order to achieve the technical purpose, the technical solution of the present invention is: a medical accelerator treatment bed, comprising:

Bed board, used to carry patients;

The horizontal driving mechanism, the longitudinal driving mechanism and the vertical lifting mechanism are used to drive the bed board to move forward and backward, left and right, and up and down respectively;

A longitudinal rollover fine-tuning mechanism is used to drive the bed plate to perform longitudinal left-right isocentric rotation fine-tuning;

The lateral pitch fine-tuning mechanism is used to drive the bed plate to perform lateral front-back isocentric rotation fine-tuning.

Furthermore, the transverse driving mechanism is slidably connected to the longitudinal driving mechanism, the longitudinal driving mechanism is slidably connected to the vertical lifting mechanism, and the bed board is fixed to the transverse driving structure.

Further, the longitudinal rollover fine-tuning mechanism is arranged between the bed plate and the transverse driving mechanism, and the longitudinal rollover fine-tuning mechanism comprises: a connecting plate, a rotating shaft and an eccentric wheel;

The bed plate is fixed on the connecting plate, and one side of the connecting plate is rotatably arranged in the transverse driving structure through a connecting piece.

The rotating shaft is transversely arranged in the transverse driving structure and is located under the other side of the connecting plate. The connecting plate is fixedly penetrated by an eccentric wheel for driving the connecting plate to roll over and rotate relative to the transverse driving mechanism.

Furthermore, the vertical lifting mechanism comprises:

Double scissor lift device, used to drive the up and down movement of the bed board through scissor action;

The guide rail frame includes guide plates at both sides and front and rear connecting plates. The guide plates are provided with transverse grooves and fixing holes. The upper ends of the double scissor lift devices are respectively clamped in the transverse grooves and the fixing holes through rolling bearings.

Furthermore, the longitudinal driving mechanism comprises a longitudinal slider and a fixed plate, and the longitudinal slider is slidably connected to the fixed plate;

The lateral pitch fine adjustment mechanism comprises:

A pitch bottom plate, a fixed plate is fixed on the pitch bottom plate, and the guide rail frame is sleeved on the pitch bottom plate;

A guide connecting plate, wherein an inclined groove is provided on the guide plate, and both ends of the guide connecting plate are clamped in the inclined groove through an idler wheel;

The linear drive device is fixed between the pitch bottom plate and the guide connecting plate, and is used to drive the guide connecting plate to move along the inclined groove to achieve the front and rear isocentric rotation fine adjustment of the bed plate.

Furthermore, the linear drive device comprises: a rotating motor, a screw rod, a fixed block, and a sliding housing;

The fixed block is fixed on the guide connecting plate, the rotary motor drives the screw rod to rotate in the fixed block, and drives the fixed block to move relative to the sliding shell at the same time, and the pitch bottom plate is fixed on the sliding shell.

Furthermore, a displacement sensor is included for measuring the displacement of the fixed block relative to the sliding housing.

Preferably, the displacement sensor includes a baffle and an inverted U-shaped photoelectric sensor;

The baffle is fixed beside the fixed block, and the inverted U-shaped photoelectric sensor is fixed beside the sliding shell; the relative displacement measurement of the fixed block relative to the sliding shell is realized by sliding the inverted U-shaped photoelectric sensor over the baffle.

Preferably, guide rails and slide grooves are provided and fixed on the guide connecting plate and under the pitch bottom plate respectively.

Preferably, the transverse driving mechanism comprises a first transverse slider and a second transverse slider; the first transverse slider is slidably disposed in the second transverse slider.

The beneficial effects of the present invention are:

1) The cross-arranged transverse drive mechanism, longitudinal drive mechanism, and vertical lifting mechanism of the present invention enable the bed board to move in the up-down, left-right, front-back directions, and the whole machine is small in size;

2) The longitudinal rollover fine-tuning mechanism of the present invention drives the connecting plate to roll over and rotate relative to the transverse driving mechanism through the eccentric wheel, that is, drives the bed board to rotate fine-tuned longitudinally to the left and right isocentrically, thereby correcting the deformation of the left and right sides of the bed board caused by uneven force, which greatly facilitates positioning.

3) The lateral pitch fine-tuning mechanism of the present invention adopts an implementation method of an inclined slot and a branch line drive installation, which utilizes the space of the existing four-degree-of-freedom treatment bed without increasing the design height of the bed, and arranges a linear drive device in the double scissors lifting device. The inclined slot is used to realize the nodding action of the bed board, thereby correcting the front and rear deformation of the bed board caused by its own rigidity or uneven force.

In summary, the medical accelerator treatment bed of the present invention can realize multi-dimensional movement, realize rollover and pitch fine-tuning correction, realize precise positioning, and has the beneficial effects of simple structure, small overall size, and stable operation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a medical accelerator treatment bed of the present invention;

FIG2 is a schematic diagram of the exploded structure of the medical accelerator treatment bed of the present invention;

FIG3 is a schematic diagram of the overall structure of the transverse drive mechanism and the longitudinal drive mechanism of the present invention;

4 is a schematic diagram of the installation structure of the longitudinal rollover fine-tuning mechanism of the present invention in the first transverse slide;

FIG5 is a schematic diagram of the overall structure of the longitudinal drive mechanism of the present invention;

FIG6 is a schematic diagram of the overall structure of the lateral pitch fine-tuning mechanism of the present invention;

7 is a schematic diagram of the installation structure of the linear drive device and the guide connecting plate in the guide frame of the present invention;

FIG. 8 is a schematic diagram of the structure of the linear drive device of the present invention.

Detailed ways

The technical solution of the present invention will be described clearly and completely below.

It should be noted that the “front”, “back” and “lateral” mentioned in the present invention are relative to the x direction of the three-dimensional coordinates in FIG. 1 ; the “left”, “right” and “longitudinal” are relative to the y direction of the three-dimensional coordinates in FIG. 1 ; and the “up”, “down” and “vertical” are relative to the z direction of the three-dimensional coordinates in FIG. 1 ; the above-mentioned directional terms are all for explaining the installation and operation principles of the treatment bed of the present invention and shall not be construed as limitations on the present invention.

A medical accelerator treatment bed, as shown in FIG1 and FIG2, comprises:

A bed board 1, used for carrying a patient;

The transverse driving mechanism and the longitudinal driving mechanism 2 and the vertical lifting mechanism 4 are used to drive the bed board to move forward and backward, left and right, and up and down respectively;

The longitudinal rollover fine-tuning mechanism is used to drive the bed board to perform longitudinal left and right isocentric rotation fine-tuning, thereby realizing the correction of left and right side deformation of the bed board caused by uneven force.

The lateral pitch fine-tuning mechanism 3 is used to drive the bed board to perform isocentric rotation fine-tuning in the lateral direction, thereby correcting the front and rear deformation of the bed board caused by its own rigidity or uneven force.

Further, as shown in Fig. 3, the transverse driving mechanism is slidably connected to the longitudinal driving mechanism, the longitudinal driving mechanism is slidably connected to the vertical lifting mechanism 4, and the bed plate is fixed to the transverse driving structure. The transverse driving mechanism, the longitudinal driving mechanism 2, and the vertical lifting mechanism 4 arranged in an interlaced manner realize the movement of the bed plate in the x, y, and z directions of the coordinates in Fig. 1.

Further, as shown in FIG4 , the longitudinal rollover fine-tuning mechanism is disposed between the bed plate and the transverse drive mechanism, and the longitudinal rollover fine-tuning mechanism includes: a connecting plate 205 , a rotating shaft 210 and an eccentric wheel 209 ;

The bed board 1 is fixed to the connecting plate, and one side of the connecting plate is rotatably arranged in the transverse driving structure through the connecting piece 208.

The rotating shaft 210 is transversely arranged in the transverse driving structure and is located under the other side of the connecting plate 205. The connecting plate is fixedly provided with an eccentric wheel 209, which is used to drive the connecting plate to rotate sideways relative to the transverse driving mechanism, that is, to drive the bed board to rotate longitudinally to the left and right isocentrically fine-tuned, thereby correcting the deformation of the left and right sides of the bed board caused by uneven force, greatly facilitating the positioning. It should be noted that the rotating shaft can be driven by a rotating shaft or manually, and in addition to the rotating shaft and the eccentric wheel, a lifting motor and a lifting cylinder that can lift and support the connecting plate on one side can be simply replaced by a person skilled in the art for the lifting mechanism, which all fall within the scope of protection of the present invention.

Preferably, as shown in FIG3 , the transverse drive mechanism includes a first transverse slider 204 and a second transverse slider 203; the first transverse slider 204 is slidably mounted in the second transverse slider. In some embodiments of the present invention, preferably, the second transverse slider 203, the longitudinal slider 202, and the pitch bottom plate 301 are all U-shaped. Through the U-shaped design, the second transverse slider, the longitudinal slider, and the pitch bottom plate are mutually engaged, which greatly reduces the volume of the whole machine and does not affect the cross movement between each other. At the same time, the two-stage drive mechanism composed of the first transverse slider 204 and the second transverse slider 203 greatly improves the structure and operation stability of the whole machine compared to the traditional integrated transverse drive mechanism.

Preferably, a groove is provided inside the longitudinal slider 202, and the first drive motor 207 is provided in the groove, and the first drive motor 207 drives the transverse drive mechanism to move relative to the longitudinal slider 202; similarly, a hole is opened on the pitch bottom plate 301, and the second drive motor 206 is provided in the hole to drive the longitudinal slider 202 to move along the fixed plate 201. The first drive motor 207 and the second drive motor 206 can be driven by gears, synchronous belts, etc. The design of the groove and the hole provides accommodation space for the first drive motor 207 and the second drive motor 206 without affecting the volume of the whole machine.

Furthermore, the vertical lifting mechanism comprises:

Double scissor lift device, used to drive the up and down movement of the bed board through scissor action;

The guide rail frame, as shown in Figures 6 and 7, includes guide plates 305 on both sides and front and rear connecting plates 309. The guide plates are provided with transverse grooves 306 and fixing holes 307. The upper ends of the double scissor lift device are respectively clamped in the transverse grooves and the fixing holes through rolling bearings. The design of the transverse grooves provides space for shearing action.

Furthermore, the longitudinal driving mechanism includes a longitudinal slider 202 and a fixed plate, and the longitudinal slider is slidably connected to the fixed plate 201;

The lateral pitch fine adjustment mechanism comprises:

The pitch bottom plate 301, the fixed plate is fixed on the pitch bottom plate, and the guide rail frame is sleeved on the pitch bottom plate;

A guide connecting plate 303, wherein an inclined groove 308 is formed on the guide plate, and both ends of the guide connecting plate 303 are clamped in the inclined groove 308 through an idler wheel 313;

The linear drive device is fixed between the pitch bottom plate 301 and the guide connecting plate 303, and is used to drive the guide connecting plate 303 to move along the inclined groove to achieve the front and rear isocentric rotation fine adjustment of the bed board. The implementation method of the inclined groove and branch line drive installation utilizes the space of the existing four-degree-of-freedom treatment bed without increasing the design height of the bed, and arranges the linear drive device in the double scissor lift device. The inclined groove is used to realize the nodding action of the bed board, and the front and rear deformation of the bed board caused by its own rigidity or uneven force is corrected. In order to further adapt to different types of treatment beds, this mechanism can also be used in single-scissor treatment beds, etc.

Further, as shown in FIG. 7 and FIG. 8 , the linear drive device includes: a rotating motor 302 , a screw rod, a fixing block 314 , and a sliding housing 304 ;

The fixed block 314 is fixed on the guide connecting plate 303, and the rotary motor drives the screw rod to rotate in the fixed block, and at the same time drives the fixed block to move relative to the sliding shell, and the pitch bottom plate is fixed on the sliding shell.

Furthermore, a displacement sensor is included to measure the displacement of the fixed block relative to the sliding shell, and further determine the front and rear pitch angles of the bed board.

Preferably, the displacement sensor includes a baffle 311 and an inverted U-shaped photoelectric sensor 312;

The baffle is fixed beside the fixed block, and the inverted U-shaped photoelectric sensor is fixed beside the sliding shell; the relative displacement measurement of the fixed block relative to the sliding shell is realized by sliding the inverted U-shaped photoelectric sensor over the baffle.

Preferably, guide rails and slide grooves are provided and fixed on the guide connecting plate and under the pitch bottom plate, respectively, to provide guidance for the relative displacement of the guide connecting plate 303 and the connecting plate 205 .

For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the protection scope of the present invention.

Claims (6)

1. A medical accelerator treatment bed, comprising: Bed board, used to carry patients; The horizontal driving mechanism, the longitudinal driving mechanism and the vertical lifting mechanism are used to drive the bed board to move forward and backward, left and right, and up and down respectively; A longitudinal rollover fine-tuning mechanism is used to drive the bed plate to perform longitudinal left-right isocentric rotation fine-tuning; The lateral pitch fine-tuning mechanism is used to drive the bed plate to perform lateral front-back isocentric rotation fine-tuning; wherein, The longitudinal rollover fine-tuning mechanism is arranged between the bed plate and the transverse driving mechanism, and the longitudinal rollover fine-tuning mechanism comprises: a connecting plate, a rotating shaft and an eccentric wheel; The bed board is fixed on the connecting plate, and one side of the connecting plate is rotatably arranged in the transverse driving mechanism through a connecting piece. The rotating shaft is transversely arranged in the transverse driving mechanism and is located under the other side of the connecting plate. The connecting plate is fixedly provided with an eccentric wheel for driving the connecting plate to roll over and rotate relative to the transverse driving mechanism. The vertical lifting mechanism comprises: Double scissor lift device, used to drive the up and down movement of the bed board through scissor action; The guide rail frame includes guide plates on both sides and front and rear connecting plates. The guide plates are provided with transverse grooves and fixing holes. The upper ends of the double scissor lift devices are clamped in the transverse grooves and the fixing holes through rolling bearings respectively. The longitudinal driving mechanism comprises a longitudinal slider and a fixed plate, and the longitudinal slider is slidably connected to the fixed plate; The lateral pitch fine adjustment mechanism comprises: A pitch bottom plate, a fixed plate is fixed on the pitch bottom plate, and the guide rail frame is sleeved on the pitch bottom plate; A guide connecting plate, wherein an inclined groove is provided on the guide plate, and both ends of the guide connecting plate are clamped in the inclined groove through an idler wheel; A linear drive device is fixed between the pitch bottom plate and the guide connecting plate, and is used to drive the guide connecting plate to move along the inclined groove to achieve the front and rear isocentric rotation fine adjustment of the bed plate; The linear drive device comprises: a rotating motor, a screw rod, a fixed block, and a sliding housing; The fixed block is fixed on the guide connecting plate, the rotary motor drives the screw rod to rotate in the fixed block, and drives the fixed block to move relative to the sliding shell at the same time, and the pitch bottom plate is fixed on the sliding shell. 2. The medical accelerator treatment couch according to claim 1, characterized in that: The transverse driving mechanism is slidably connected to the longitudinal driving mechanism, the longitudinal driving mechanism is slidably connected to the vertical lifting mechanism, and the bed plate is fixed to the transverse driving mechanism. 3. The medical accelerator treatment couch according to claim 1, further comprising a displacement sensor for measuring the displacement of the fixed block relative to the sliding housing. 4. The medical accelerator treatment couch according to claim 3, characterized in that the displacement sensor comprises a baffle and an inverted U-shaped photoelectric sensor; The baffle is fixed beside the fixed block, and the inverted U-shaped photoelectric sensor is fixed beside the sliding shell; the relative displacement measurement of the fixed block relative to the sliding shell is realized by sliding the inverted U-shaped photoelectric sensor over the baffle. 5. The medical accelerator treatment bed according to claim 1, characterized in that guide rails and slide grooves are provided and fixed on the guide connecting plate and under the pitch bottom plate respectively. 6. The medical accelerator treatment couch according to claim 2, characterized in that the transverse driving mechanism comprises a first transverse slider and a second transverse slider; the first transverse slider is slidably disposed in the second transverse slider.