CN114376591A

CN114376591A - Scanning mechanism of CT scanner

Info

Publication number: CN114376591A
Application number: CN202111682817.8A
Authority: CN
Inventors: 周永钢
Original assignee: Zhecheng Traditional Chinese Medicine Hospital Co ltd
Current assignee: Zhecheng Traditional Chinese Medicine Hospital Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-22

Abstract

The invention discloses a scanning mechanism of a CT scanner, which comprises a scanning frame in an annular structure, an X-ray tube, a detector and an external computer, wherein the X-ray tube, the detector and the external computer are arranged in the scanning frame, a bed seat moving along the axial direction of the scanning frame is arranged in front of the scanning frame, a bed plate translating along the width direction of the bed seat is arranged at the top of the bed seat, a pair of servo motors are arranged below the bed seat and close to the front of the scanning frame, a pair of front box servo electric cylinders are arranged in front of the scanning frame and between the front box and the pair of servo motors, and a pair of rear box servo electric cylinders are arranged in the rear box. The invention uses the front and back boxes servo electric cylinders which are arranged at the front and back of the scanning frame and are used for synchronously supporting the bed seat, and when the scanning frame is stopped, the bed seat can be moved into the inner ring of the scanning frame, thereby reducing the space occupation condition of the extension state of the bed seat, leading the indoor medical personnel to move freely and having practical value.

Description

Scanning mechanism of CT scanner

Technical Field

The invention relates to the technical field of medical X-ray diagnosis, in particular to a scanning mechanism of a CT scanner.

Background

CT scanner is a short for electronic computer tomography. The patient lies on the bed plate outside the annular scanning frame, and is driven to move towards the inner ring of the scanning frame, and the X-ray tube in the scanning frame emits X-ray radiation, and the image is processed and imaged by the computer, so that the image of each part of the human body is displayed on the screen. According to the difference of X-ray absorption and transmission rate of different tissues of human body said invented method can use electronic computer to process data, then can take the cross-section or three-dimensional image of the examined portion of human body and find the fine pathological changes of any portion in the body.

However, some patients who are inconvenient to move or seriously injured are transported by medical care personnel, and the patients are transferred from the stretcher vehicle to the bed plate in front of the scanning frame and are moved after scanning, so that the transfer is difficult and time-consuming, the progress of examination and treatment of the patients is directly delayed, and even secondary transfer injury is caused to the patients. In addition, the bed board in current scanner the place ahead is in overhanging state all the time, great occupation indoor space, influences medical personnel's home range.

Disclosure of Invention

The present invention is directed to a scanning mechanism of a CT scanner to solve the above problems.

In order to achieve the above purpose, the present invention provides a scanning mechanism of a CT scanner, comprising a scanning frame in an annular structure, an X-ray tube and a detector installed inside the scanning frame, and an external computer, wherein a bed base which can move along the axial direction of the scanning frame and can be parked in an inner ring of the scanning frame is arranged in front of the scanning frame, a bed plate which can move horizontally along the width direction of the bed base is arranged at the top of the bed base, a pair of servo motors which are used for controlling the axial movement of the bed base are arranged below the bed base and close to the front of the scanning frame, a pair of front box servo electric cylinders which are used for controlling the lifting of the bed base are arranged in front of the scanning frame and between the pair of servo motors, a double-head motor which is used for driving the bed plate to move horizontally is arranged at one long side edge of the top surface of the bed base, a plurality of pull rods which are used for increasing the outward extending compression resistance of the bed plate are embedded in the width direction of the top surface of the bed base, a piston rod of each front box servo electric cylinder is provided with a supporting plate which is clamped with the bottom of the bed base and can slide, the top end of an output shaft of the servo motor is sleeved with a telescopic shaft, the top of the telescopic shaft is sleeved with a transmission gear, and a transmission rack bar is fixedly connected to the center line of the length direction of the bottom surface of the bed base.

As a further improvement of the technical scheme, a front box and a rear box are arranged below an inner ring of the scanning frame and located on the front side and the rear side of the inner ring, the servo motor and the servo electric cylinder of the front box are arranged in the front box, the servo electric cylinder of the rear box is arranged in the rear box, the servo electric cylinder of the front box and the servo electric cylinder of the rear box are connected in series through a lead to form a closed loop, and a supporting ball is embedded in the top of an output shaft of the servo electric cylinder of the rear box.

As a further improvement of this technical scheme, the bedplate is cuboid structure and its top surface and has been offered and be rectangular cavity, coaxial coupling has a plurality of driving gears on double-end motor's the both ends output shaft, double-end motor's axial is the same with the length direction of bedplate, the bottom surface of bed board just corresponds a plurality of racks of meshing along its width direction fixedly connected with and a plurality of driving gears.

As a further improvement of the technical scheme, the pull rod is sleeved with a pull sleeve with a triangular cross section, and a plurality of clamping seats correspondingly inserted with the pull sleeves are arranged on the bottom surface of the bed board and opposite to the double-end motor.

As a further improvement of the technical scheme, the sliding grooves are symmetrically formed in the two sides of the long edge of the bed, the clamping strips with the cross sections being L-shaped are symmetrically arranged on the bottom surface of the bed along the central line of the length direction of the bed, and the supporting plate is an arc plate, and the inner side of the top end of the supporting plate and the inner side of the bottom end of the supporting plate are horizontally provided with clamping tables which are respectively clamped with the sliding grooves and the clamping strips.

As a further improvement of the technical scheme, the top end of an output shaft of the servo motor is coaxially connected with a driving shaft which is connected with the telescopic shaft in an inserting mode, a waist-shaped groove is formed in the radial side face of the driving shaft along the axial direction of the driving shaft, a pin extending into the waist-shaped groove penetrates through the bottom of the telescopic shaft in the radial direction, the cross section of the transmission toothed bar is in an inverted T shape, and a plurality of conical teeth are symmetrically arranged on two vertical side faces of the transmission toothed bar.

As a further improvement of the technical scheme, a linkage supporting group for supporting the bed seat to extend forward is arranged in the front box, the linkage supporting group comprises a supporting tube and a bottom supporting plate which are arranged on the bottom surface of the front box and can be lifted synchronously, a plurality of linkage supporting blocks and driven supporting blocks which are in horizontal sliding connection with the top of the bottom supporting plate, and a top supporting plate which is supported on the bottom surface of the bed seat, pushing blocks are symmetrically arranged on the bottom surface of the bed seat and far away from one end of the scanning frame, a pair of the pushing blocks are arranged on two sides of the transmission rack bar, top plate grooves which are clamped with the pushing blocks are symmetrically arranged on two sides of the long central line of the top surface of the top supporting plate, and the top plate grooves extend along the length direction of the top supporting plate and do not penetrate through two ends.

As a further improvement of this technical scheme, the flexible pipe with end brace board bottom surface fixed connection has been cup jointed to the inside of stay tube, the bottom plate chamber has been seted up at the top surface middle part of end brace board, the front and back end in bottom plate chamber inlays and is equipped with a pair of bottom plate chamber pole, the top surface front end department and its bottom surface rear end department of linkage kicking block all are equipped with and push away the strip, push away the preceding terminal surface symmetry of strip and seted up the jack, the bottom plate chamber is with the push away strip joint and the slidable that are located the linkage kicking block bottom surface on the end brace board top surface, the jack is pegged graft and is slided with bottom plate chamber pole.

As a further improvement of this technical scheme, the bracer chamber has been seted up at the last under surface middle part of passive bracer, the front and back end in bracer chamber inlays and is equipped with a pair of bracer chamber pole, the bracer chamber of passive bracer top surface pushes away the strip joint and can slide with the linkage bracer bottom surface that is located its top, the bracer chamber of passive bracer bottom surface pushes away the strip joint and can slide with the linkage bracer top surface that is located its below.

As a further improvement of the technical scheme, a top plate cavity is formed in the middle of the bottom surface of the top supporting plate, a pair of top plate cavity rods is embedded in the front end and the rear end of the top plate cavity, the top plate cavity is connected with a push bar on the top surface of the linkage supporting block in a clamped mode and can slide, and the top plate cavity rods are connected with jacks of the push bar in an inserted mode and can slide.

Compared with the prior art, the invention has the beneficial effects that:

1. in the scanning mechanism of the CT scanner, the bed seat which is arranged in the front of the scanning frame and can move along the axial direction of the scanning frame and can be stopped in the inner ring of the scanning frame is utilized, and the front box servo electric cylinder and the rear box servo electric cylinder which are arranged in the front and the rear of the scanning frame and are used for synchronously supporting the bed seat are utilized, when the scanning frame is stopped, the bed seat can be moved to the inner ring of the scanning frame, so that the condition that the extending state occupies space is reduced, indoor medical personnel can move freely, and the CT scanner has practical value.

2. Among this CT scanner's scanning mechanism, through the bed board of its width direction translation of edge that sets up at the top of bedstand, dock the stretcher that the patient lain through the translation bed board on, and insert the patient and carry on one's back down, return the bed board again and transport the bedstand with the patient smoothly on, alright carry out the CT scanning, this mode avoids some inconvenient patients of action to transport the difficulty, take time, does benefit to and alleviates medical personnel's working strength, has practical value.

3. In the scanning mechanism of the CT scanner, the linkage support group capable of moving along with the bed and supporting is arranged, a plurality of linkage supporting blocks and a plurality of passive supporting blocks of a layer-by-layer superposed structure in the linkage support group are horizontally slid, the horizontal expansion range is increased, the linkage support group is smoothly supported at the front end of the bed, the suspension bending of the linkage supporting blocks is avoided, the design is ingenious, the automation is high, and the practical value is achieved.

4. In the scanning mechanism of the CT scanner, the plurality of pull rods are arranged in the bed base, the pull sleeves on the pull rods are connected with the bed plate in an inserting mode, counter-pulling force is applied to the bed plate in an extending state, the weight of a patient on the bed plate is resisted, and the bed plate is enabled to be horizontally moved and reset under the driving of the double-head motor.

Drawings

FIG. 1 is a schematic structural view of the overall operation state of embodiment 1;

FIG. 2 is a second structural diagram illustrating the overall operation state of the embodiment 1;

FIG. 3 is a structural view showing an overall collapsed state in embodiment 1;

FIG. 4 is an overall assembled side view of embodiment 1;

FIG. 5 is a schematic view of an overall assembly structure of the bed base according to embodiment 1;

FIG. 6 is a schematic view of the linkage support assembly of embodiment 1 in a collapsed state;

FIG. 7 is a schematic view showing the structure of the linkage support set in the expanded state according to embodiment 1;

FIG. 8 is a schematic view of the bottom structure of the bed in example 1;

FIG. 9 is a schematic view showing an assembly structure of a pair of servo motors according to embodiment 1;

fig. 10 is a schematic view of an assembly structure of a pair of front box servo electric cylinders according to embodiment 1;

FIG. 11 is an exploded view of the interlocking support group of embodiment 1;

FIG. 12 is an exploded view of the second linkage support set of the embodiment 1;

fig. 13 is a structural view showing a bed plate in an unfolded state in embodiment 1;

fig. 14 is a schematic view of an assembly structure at the bottom of the bed board in the embodiment 1;

FIG. 15 is a schematic view of the structure of the bed unit according to embodiment 1;

fig. 16 is a schematic view of the bottom structure of the bed plate of embodiment 1;

FIG. 17 is an assembled and disassembled view of the retainer of the rear case of embodiment 1;

fig. 18 is a schematic view of the front box retainer structure of embodiment 1.

The various reference numbers in the figures mean:

100. a scanning frame; 110. a front box; 120. a rear box; 130. a front box retainer; 140. a rear box guard ring; 150. a bracket;

200. a bed base; 201. a chute; 202. a concave cavity; 203. a rack chute; 210. a bed board; 211. a rack; 212. a card holder; 220. a drive rack; 230. clamping the strip; 240. a push block;

250. a double-headed motor; 251. a driving gear; 252. fixing a sleeve; 260. a pull rod; 270. pulling the sleeve;

300. a servo motor; 310. a drive shaft; 311. a waist-shaped groove; 320. a telescopic shaft; 321. a ball; 330. a transmission gear;

400. a front box servo electric cylinder; 410. a support plate; 411. clamping a platform;

500. a linkage support group; 510. supporting a tube; 511. a telescopic pipe; 520. a bottom supporting plate; 521. a floor cavity; 522. a floor cavity bar; 530. linkage supporting blocks; 531. pushing the strips; 532. a jack;

540. a passive brace block; 541. a brace piece cavity; 542. a strut block cavity rod; 550. a top bracing plate; 551. a roof plate groove; 552. a ceiling cavity; 553. a top plate cavity rod;

700. a rear box servo electric cylinder; 710. supporting the ball; 720. and (4) a spherical shell.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central axis", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1

Referring to fig. 1-18, the present invention provides a scanning mechanism of a CT scanner, which includes a ring-shaped gantry 100, an X-ray tube and a detector installed inside the gantry, and an external computer, wherein the CT scanner has a working procedure that the human body is measured by using a detector with high sensitivity according to the difference of the absorption and transmittance of different tissues of the human body to the X-ray, and then the data obtained by the measurement is input into an electronic computer, and after the data is processed by the electronic computer, a cross-sectional or stereoscopic image of the examined part of the human body can be taken to find the tiny lesion of any part in the body.

In this embodiment, the bed 200 is disposed in front of the scanning frame 100 and can move along the axial direction and stop in the inner ring, when the scanning frame 100 is not used, the bed 200 can move into the inner ring of the scanning frame 100, so as to reduce the space occupied by the bed in its extended state, and enable the medical staff in the room to move freely. The top of bedstand 200 is provided with the bed board 210 along its width direction translation, through extending out bedstand 200 from the scanner frame 100 in, then translation bed board 210 docks to the stretcher that the patient lain on, and inserts the patient and carry on one's back down, returns to move bed board 210 again and transport the patient to the bedstand 200 smoothly, alright carry out the CT scan, this mode avoids some inconvenient patients of action to transport the difficulty, take time, does benefit to and alleviates medical personnel's working strength. A pair of servo motors 300 for controlling the axial movement of the bed 200 are disposed below the bed 200 and near the front of the gantry 100, and a pair of front box servo electric cylinders 400 for controlling the lifting of the bed 200 are disposed in front of the gantry 100 and between the pair of servo motors 300, so that the height of the bed 200 can be adjusted to match the height of the stretcher, and the bed plate 210 can be smoothly inserted into the top surface of the stretcher.

Specifically, a double-headed motor 250 for driving the bed plate 210 to move horizontally is disposed at a long side of the top surface of the bed base 200. A plurality of pull rods 260 for increasing the outward extension compression resistance of the bed plate 210 are embedded in the top surface of the bed base 200 along the width direction of the bed base, and the bed plate 210 in an outward extension state is exerted with counter-pulling force through the pull rods 260 to resist the weight of a patient on the bed plate 210, so that the bed plate 210 is enabled to be horizontally moved and reset under the driving of the double-head motor 250. The top end of the piston rod of the front box servo electric cylinder 400 is provided with a supporting plate 410 which is clamped with the bottom of the bed base 200 and can slide, so that the front box servo electric cylinder 400 is used for driving the bed base 200 to ascend and descend. The top end of the output shaft of the servo motor 300 is sleeved with a telescopic shaft 320, the top of the telescopic shaft 320 is sleeved with a transmission gear 330, the transmission toothed bar 220 is fixedly connected to the middle line of the length direction of the bottom surface of the bed base 200, and the pair of servo motors 300 rotate oppositely, so that the bed base 200 can be driven in the same direction. The driving gear 330 is engaged with the driving rack 220, and is lifted up and down by the telescopic shaft 320 along with the lifting of the bed 200, so that the servo motor 300 can drive the bed 200 with different heights to move along the length direction thereof, and move in and out of the scanning frame 100.

Specifically, a front box 110 and a rear box 120 are arranged below the inner ring of the gantry 100 and on the front and rear sides thereof, a front box guard ring 130 is bonded on the top surface of the front box 110, a rear box guard ring 140 is bonded on the top surface of the rear box 120, and the front box guard ring 130 and the rear box guard ring 140 are both made of plastic materials and are in a corrugated structure, so that the front box guard ring 130 and the rear box guard ring 140 can be expanded and compressed along with the ascending and descending of the bed base 200, and the functions of protection and beauty are achieved. The top edge of the front case retainer 130 is bonded to the outer surface of the support plate 410 so as to be always in contact with the bottom surface of the bed 200 as the support plate 410 is raised and lowered relative to the bed 200. The pair of servo motors 300 and the pair of front box servo electric cylinders 400 are both installed inside the front box 110, iron plates are sleeved at the bottoms of the pair of servo motors 300 and the pair of front box servo electric cylinders 400, and the iron plates are fixedly connected with the bottom surface of the front box 110 through bolts, so that the hiding and fixing effects are achieved. A pair of rear case servo electric cylinders 700 are installed inside the rear case 120, and the rear case servo electric cylinders 700 are fixed inside the rear case 120 by an iron plate, as described above. The front box servo electric cylinder 400 and the rear box servo electric cylinder 700 are connected in series by a wire to form a closed loop, so that the two servo electric cylinders can be started synchronously, and the bed 200 can be supported stably when entering or exiting the scanning frame 100. The top of the output shaft of the rear box servo electric cylinder 700 is embedded with a support ball 710, the top end of the piston rod of the rear box servo electric cylinder 700 is welded with a spherical shell 720, the support ball 710 is embedded in the spherical shell 720 and can roll so as to contact the bottom surface of the moving bed 200 to play a supporting role, one side of the spherical shell 720 is welded with a T-shaped bracket 150, the side surface of a long rod of the bracket 150 is bonded with the inner side of the top of the rear box guard ring 140, so that the rear box guard ring 140 expands and compresses along with the lifting of the support ball 710 and is always attached to the bottom surface of the bed 200.

Further, the bed base 200 is a cuboid structure, the top surface of the bed base is provided with a rectangular concave cavity 202, output shafts at two ends of the double-headed motor 250 are coaxially connected with a plurality of driving gears 251, the axial direction of the double-headed motor 250 is the same as the length direction of the bed base 200, the outer side of the double-headed motor 250 is covered with a fixing sleeve 252, and the fixing sleeve 252 is fixedly connected with the concave cavity 202 through bolts, so that the double-headed motor 250 works stably. The bottom surface of the bed plate 210 is fixedly connected with a plurality of racks 211 correspondingly engaged with a plurality of driving gears 251 along the width direction, that is, the double-head motor 250 is started to rotate forward to drive the driving gears 251 to rotate, so as to drive the racks 211 and the bed plate 210 to move along the width direction of the bed base 200 synchronously. The long edge of the top surface of the bed base 200 is provided with a rack chute 203 correspondingly clamped with the rack 211, so that the bed board 210 is not blocked when moving out of the bed base 200.

Specifically, the pull rod 260 is sleeved with a pull sleeve 270 with a triangular cross section, one bevel edge of the pull sleeve 270 is attached to the bottom surface of the bed plate 210 to slide, a plurality of clamping seats 212 correspondingly inserted with the pull sleeves 270 are arranged on the bottom surface of the bed plate 210 and opposite to the double-end motor 250, the clamping seats 212 are fixedly connected with the bed plate 210 through bolts, the cross section of each clamping seat 212 is in a right-angled triangle shape, the inclined surfaces of each pair of clamping seats 212 are oppositely arranged, the pull sleeve 270 can be inserted between each pair of clamping seats 212 to move, and the length of the pull sleeve 270 is at least equal to one half of the inner width of the cavity 202. When the bedplate 210 moves out of the top surface of the bedplate 200, the weight of the patient on the bedplate 210 presses on the pull sleeve 270 through each pair of clamping seats 212, and the pull sleeve 270 presses on the support rod 260, so that the weight of the patient on the bedplate 210 is resisted, and the bedplate 210 is enabled to be horizontally moved and reset under the driving of the double-head motor 250.

Further, the sliding grooves 201 are symmetrically formed in two sides of the long side of the bed base 200, the clamping strips 230 with the cross sections being L-shaped are symmetrically arranged on the bottom surface of the bed base 200 along the central line of the length direction of the bed base, the supporting plate 410 is an arc plate, the inner side of the top end and the bottom end of the supporting plate 410 are horizontally provided with clamping platforms 411 respectively clamped with the sliding grooves 201 and the clamping strips 230, two sides of the bed base 200 are arc surfaces and are matched and attached with the supporting plate 410, the supporting plate 410 can stably slide with the bed base 200, and the supporting plate 410 can drive the bed base 200 to lift along with the piston rod of the front box servo electric cylinder 400 to adjust the height of the bed base.

Specifically, the top end of the output shaft of the servo motor 300 is coaxially connected with a driving shaft 310 inserted with a telescopic shaft 320, a waist-shaped groove 311 is formed in the radial side surface of the driving shaft 310 along the axial direction of the driving shaft, a pin extending into the waist-shaped groove 311 radially penetrates through the bottom of the telescopic shaft 320, the height of the telescopic shaft 320 is matched with the lifting height of the bed base 200, the telescopic shaft 320 can stretch in the driving shaft 310 and can rotate along with the driving shaft 310 under the driving of the pin, and therefore the transmission gear 330 is driven to rotate smoothly. The cross section of the transmission rack bar 220 is in an inverted T shape, and a plurality of conical teeth are symmetrically arranged on two vertical sides of the transmission rack bar 220, and the straight rod edges protruding from two sides of the bottom of the transmission rack bar 220 are clamped below the bottom surface of the transmission gear 330, so that the lifting of the bed base 200 can be adjusted by driving the telescopic shaft 320 to automatically lift through the transmission rack bar 220. The top end of the telescopic shaft 320 is embedded with a ball 321 so as to contact and roll with the bottom surface of the moving bed 200, and further play a supporting role.

In addition, the linkage support group 500 for supporting the bed 200 to extend forward is disposed inside the front box 110, and since the bed 200 extending forward is far away from the supporting plate 410 and the pressure is increased, the linkage support group 500 moves forward along with the bed 200 extending forward to perform auxiliary support, so as to reduce the pressure of the supporting plate 410 and the front box servo electric cylinder 400, and further increase the stability of the bed 200. The linkage supporting group 500 comprises a supporting tube 510 and a bottom supporting plate 520 which are arranged on the bottom surface of the front box 110 and can be synchronously lifted, a plurality of linkage supporting blocks 530 and driven supporting blocks 540 which are horizontally and slidably connected above the bottom supporting plate 520, and a top supporting plate 550 supported on the bottom surface of the bed base 200, wherein the supporting tube 510 is fixedly connected with the bottom surface of the front box 110 through bolts, push blocks 240 are symmetrically arranged on the bottom surface of the bed base 200 and at one end far away from the scanning frame 100, a pair of push blocks 240 are arranged on two sides of the transmission gear rod 220, top plate grooves 551 clamped with the push blocks 240 are symmetrically arranged on two sides of the long central line of the top surface of the top supporting plate 550, the top plate grooves 551 extend along the length direction of the top supporting plate 550 and do not penetrate through two ends, after the bed base 200 is forwardly stretched and moved, the push blocks 240 are clamped into the top plate grooves 551 to drive the top supporting plate 550 to move along with the top supporting plate, and further the top supporting plate 550 drives the plurality of linkage supporting blocks 530 and the driven supporting blocks 540 below the top supporting block to horizontally slide layer by layer to increase the supporting range of the top supporting plate 550, the front end of the bed base 200 is smoothly supported to prevent the bed base from being bent in the air. The linkage supporting set 500 is divided into a folded and overlapped supporting state and an unfolded and overlapped supporting state, when the bed 200 is not used, namely, the bed is stopped in the inner ring of the scanning frame 100, the linkage supporting set 500 is in the folded and overlapped supporting state, otherwise, when the bed 200 is stretched forwards, the linkage supporting set 500 is in the unfolded and overlapped supporting state.

Specifically, the inside of the supporting tube 510 is sleeved with a telescopic tube 511 fixedly connected with the bottom surface of the bottom bracing plate 520, the top end of the telescopic tube 511 is fixedly connected with the bottom surface of the bottom bracing plate 520 through bolts, and the linkage supporting group 500 can be changed in the height direction by adjusting the length of the telescopic tube 511 and designing the thickness of a plurality of linkage supporting blocks 530 and passive supporting blocks 540, so as to be supported along with the ascending and descending of the matching bed 200. Although the extension tube 511 can move freely, the expanded linkage support group 500 is not subjected to a vertical force, but a radial component force formed by the bed base 200 on the extension tube 511 and the support tube 510, so that a stable support effect is achieved, and when the linkage support group 500 is vertically overlapped, the bed base 200 is supported by the front box servo electric cylinder 400 and the rear box servo electric cylinder 700 together. The linkage supporting block 530, the passive supporting block 540 and the bottom supporting plate 520 are all in a cuboid structure and equal in length and width. Bottom plate chamber 521 has been seted up at the top surface middle part of bottom fagging 520, bottom plate chamber 521 is cuboid cavity structure, bottom plate chamber 521 front and back end inlays and is equipped with a pair of bottom plate chamber pole 522, the top surface front end department of linkage kicking block 530 all is equipped with and pushes away strip 531 rather than bottom surface rear end department, the jack 532 has been seted up to the preceding terminal surface symmetry of pushing away strip 531, bottom plate chamber 521 and the pushing away strip 531 joint and the slidable that is located linkage kicking block 530 bottom surface on bottom fagging 520 top surface, jack 532 pegs graft and slidable with bottom plate chamber pole 522, through bottom plate chamber pole 522 with push away strip 531 sliding connection, and spacing to pushing away strip 541 through the kicking block chamber, and guarantee linkage kicking block 530 and bottom sprag plate 520 horizontal slip and not the slippage.

Specifically, the middle of the upper and lower surfaces of the passive supporting block 540 is provided with a supporting block cavity 541, the supporting block cavity 541 is in a cuboid cavity structure, the front and rear ends of the supporting block cavity 541 are embedded with a pair of supporting block cavity rods 542, the supporting block cavity 541 on the top surface of the passive supporting block 540 is clamped with a push bar 531 on the bottom surface of the linkage supporting block 530 above the passive supporting block and can slide, the supporting block cavity 541 on the bottom surface of the passive supporting block 540 is clamped with the push bar 531 on the top surface of the linkage supporting block 530 below the passive supporting block and can slide, the supporting block cavity rods 542 are connected with the push bar 531 in a sliding manner, the push bar 531 is limited by the supporting block cavity, the linkage supporting block 530 and the passive supporting block 540 are ensured to slide horizontally and do not slide, and when the linkage supporting block 530 above moves forwards and backwards, the passive supporting block 540 below the linkage supporting block can be driven to move forwards and backwards horizontally.

Further, a top plate cavity 552 is formed in the middle of the bottom surface of the top supporting plate 550, the top plate cavity 552 is of a cuboid cavity structure, a pair of top plate cavity rods 553 is embedded at the front end and the rear end of the top plate cavity 552, the top plate cavity 552 is connected with a pushing strip 531 on the top surface of the linkage supporting block 530 in a clamping mode and can slide, the top plate cavity rods 553 are connected with a jack 532 of the pushing strip 531 in a splicing mode and can slide, and the linkage supporting block 530 can be driven to move forwards and backwards when the top supporting plate 550 moves forwards and backwards.

When a patient is placed in the scanning mechanism of the CT scanner, a pair of servo motors 300 are started to drive the bed base 200 and the bed plate 210 to synchronously move out of the inner ring of the scanning frame 100, the bed base 200 which moves forwards pushes the top supporting plate 550 to move forwards through the pushing block 240, and further drives the plurality of linkage supporting blocks 530 and the plurality of driven supporting blocks 540 to horizontally move forwards layer by layer so as to support the end part of the bed base 200 far away from the scanning frame 100, then the front box servo electric cylinder 400 is started to drive the supporting plate 410 to support the bed base 200 to ascend and descend, the bed plate 210 is adjusted to the top surface of the patient stretcher vehicle, then the double-head motor 250 is started to rotate forwards to drive the driving gear 251 to rotate, so as to drive the rack 211 and the bed plate 210 to synchronously move along the width direction of the bed base 200 to extend into the back of the patient to be supported, then the double-head motor 250 is started to rotate backwards to drive the bed plate 210 to drive the patient to be transferred to be right above the bed base 200, and then the pair of the servo motors 300 can be started to drive the bed base 200 to move into the inner ring of the scanning frame 100, is irradiated and scanned by an X-ray tube.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a CT scanner's scanning mechanism, is including being annular structure's scan frame (100), the X-ray tube and the detector of scan frame internally mounted and external computer, its characterized in that: a bed base (200) which moves axially along the scanning frame and can be parked in an inner ring of the scanning frame is arranged in front of the scanning frame (100), a bed plate (210) which translates along the width direction of the bed base is arranged at the top of the bed base (200), a pair of servo motors (300) which are used for controlling the axial movement of the bed base (200) are arranged below the bed base (200) and close to the front of the scanning frame (100), a pair of front box servo electric cylinders (400) which are used for controlling the lifting of the bed base (200) are arranged between the front of the scanning frame (100) and the pair of servo motors (300), a double-end motor (250) which is used for driving the bed plate (210) to translate is arranged at one long side edge in the top surface of the bed base (200), a plurality of pull rods (260) which are used for increasing the pressure resistance of the bed plate (210) to be extended are embedded in the top surface of the bed base (200) along the width direction, and a supporting plate (410) which is clamped with the bottom of the bed base (200) and can slide is arranged at the top end of a piston rod of the front box servo electric cylinder (400), the top end of an output shaft of the servo motor (300) is sleeved with a telescopic shaft (320), the top of the telescopic shaft (320) is sleeved with a transmission gear (330), and a transmission rack bar (220) is fixedly connected to the center line of the length direction of the bottom surface of the bed base (200).

2. The scanning mechanism of the CT scanner of claim 1, wherein: the scanning frame is characterized in that a front box (110) and a rear box (120) are arranged below an inner ring of the scanning frame (100) and located on the front side and the rear side of the inner ring, a pair of servo motors (300) and a pair of servo electric cylinders (400) of the front box are arranged inside the front box (110), a pair of rear box servo electric cylinders (700) are arranged inside the rear box (120), the servo electric cylinders (400) of the front box and the servo electric cylinders (700) of the rear box are connected in series through a wire to form a closed loop, and a supporting ball (710) is embedded in the top of an output shaft of the servo electric cylinders (700) of the rear box.

3. The scanning mechanism of the CT scanner of claim 1, wherein: bed seat (200) are cuboid structure and its top surface and have been seted up and have been rectangular cavity (202), coaxial coupling has a plurality of driving gears (251) on the both ends output shaft of double-end motor (250), the axial of double-end motor (250) is the same with the length direction of bed seat (200), the bottom surface of bed board (210) just corresponds a plurality of racks (211) of meshing along its width direction fixedly connected with and a plurality of driving gears (251).

4. The scanning mechanism of the CT scanner of claim 3, wherein: the pull rod (260) is sleeved with a pull sleeve (270) with a triangular cross section, and a plurality of clamping seats (212) which are correspondingly inserted with the pull sleeves (270) are arranged on the bottom surface of the bed plate (210) and opposite to the double-end motor (250).

5. The scanning mechanism of the CT scanner of claim 1, wherein: spout (201) have been seted up to the long limit bilateral symmetry of bed (200), the bottom surface of bed (200) just is equipped with card strip (230) of transversal personally submitting L type along its length direction central line is gone up the symmetry, layer board (410) are the arc board and its top inboard and the equal level in bottom be equipped with spout (201) and card platform (411) of card strip (230) joint respectively.

6. The scanning mechanism of the CT scanner of claim 1, wherein: the output shaft top coaxial coupling of servo motor (300) has driving shaft (310) of pegging graft with telescopic shaft (320), waist type groove (311) have been seted up just along its axial to the radial side of driving shaft (310), the radial pin that has run through in stretching into waist type groove (311) in the bottom of telescopic shaft (320), the transversal type of personally submitting of transmission ratch (220) is just its two vertical sides symmetry is equipped with a plurality of conical tooth.

7. The scanning mechanism of the CT scanner of claim 2, wherein: the linkage supporting group (500) used for supporting the bed base (200) to extend forwards is arranged inside the front box (110), the linkage supporting group (500) comprises supporting tubes (510) and a bottom supporting plate (520) which are arranged on the bottom surface of the front box (110) and can be lifted synchronously, a plurality of linkage supporting blocks (530) and driven supporting blocks (540) which are connected in a horizontal sliding mode above the bottom supporting plate (520) and a top supporting plate (550) supported on the bottom surface of the bed base (200), pushing blocks (240) are symmetrically arranged on the bottom surface of the bed base (200) and at one end far away from the scanning frame (100), the pair of pushing blocks (240) are located on two sides of the transmission toothed rod (220), top plate grooves (551) clamped with the pushing blocks (240) are symmetrically formed in two sides of the long center line of the top surface of the top supporting plate (550), and the top plate grooves (551) extend along the length direction of the top supporting plate (550) and do not penetrate through two ends.

8. The scanning mechanism of the CT scanner of claim 7, wherein: the inside of stay tube (510) has cup jointed the flexible pipe (511) with end fagging (520) bottom surface fixed connection, end plate chamber (521) have been seted up at the top surface middle part of end fagging (520), the front and back end of end plate chamber (521) is inlayed and is equipped with a pair of bottom plate chamber pole (522), the top surface front end department and its bottom surface rear end department of linkage kicking block (530) all are equipped with and push away strip (531), push away preceding terminal surface symmetry of strip (531) and seted up jack (532), end plate chamber (521) and the push away strip (531) joint and the slidable that is located linkage kicking block (530) bottom surface on end fagging (520) top surface, jack (532) are pegged graft and slidable with end plate chamber pole (522).

9. The scanning mechanism of the CT scanner of claim 8, wherein: bracer chamber (541) have been seted up at last lower middle part of passive bracer (540), the front and back end in bracer chamber (541) inlays and is equipped with a pair of bracer chamber pole (542), bracer chamber (541) of passive bracer (540) top surface and the push away strip (531) joint and the slidable that is located linkage bracer (530) bottom surface of its top, bracer chamber (541) of passive bracer (540) bottom surface and the push away strip (531) joint and the slidable that is located linkage bracer (530) top surface of its below.

10. The scanning mechanism of the CT scanner of claim 9, wherein: top plate chamber (552) have been seted up at the bottom surface middle part of top fagging (550), the front and back end in top plate chamber (552) inlays and is equipped with a pair of top plate chamber pole (553), top plate chamber (552) and the strip (531) joint and the slidable that push away of linkage kicking block (530) top surface, top plate chamber pole (553) are pegged graft and the slidable with jack (532) of this strip (531).