A cone beam CT machine double rotating gantry and its retraction and extension auxiliary mechanism

Abstract

The utility model discloses a double rotating frame of a cone beam CT machine and a folding and unfolding auxiliary mechanism thereof, which relates to the technical field of CT machines and comprises a base frame, wherein a middle support frame is fixedly connected to the top of the base frame, a detection circular opening is penetrated through the middle of the middle support frame, a large toothed ring is rotatably connected inside the middle support frame, the large toothed ring and the detection circular opening are coaxially rotatably arranged, a probe mounting frame is fixedly connected to one side of the large toothed ring, and a detector is fixedly connected to the other side of the large toothed ring. In the utility model, a flat belt-shaped cable belt is fitted with the annular frame, and when the cable belt is folded and unfolded, the folding and unfolding auxiliary mechanism is used to contact the cable belt and push it back in a flat manner to reset it, thereby reducing the bending and torsional strength of the cable belt when the rotating part moves, thereby reducing the wear of the cable belt and extending its service life.

Description

Technical Field

[0001] The utility model relates to the technical field of CT machines, in particular to a double-rotating frame of a cone-beam CT machine and a retracting and extending auxiliary mechanism thereof. Background Art

[0002] The rotating part of the cone beam CT machine usually rotates 360 degrees. The rotational motion will bring mechanical stress to the cable. Since the rotating part of the CT machine needs to rotate continuously, the cable will also bend and twist. This continuous mechanical stress may cause the cable to wear, break or degrade. Secondly, the rotational motion may also affect the electrical performance of the cable. The cable may be subject to electromagnetic interference or vibration interference during the rotation process, resulting in unstable or distorted signal transmission, which may have a negative impact on the image quality and diagnostic accuracy of the CT machine. Utility Model Content

[0003] The utility model provides a cone beam CT machine double rotating frame and its retraction and extension auxiliary mechanism, which solves the technical problems that the cable will also bend and twist, and this continuous mechanical stress may cause the cable to wear, break or performance degradation; the cable may be subject to electromagnetic interference or vibration interference during rotation, resulting in unstable or distorted signal transmission.

[0004] To solve the above technical problems, the utility model provides a double-rotating frame of a cone-beam CT machine, comprising a base frame, a middle support frame is fixedly connected to the top of the base frame, a detection circular opening is opened through the middle of the middle support frame, a large toothed ring is rotatably connected inside the middle support frame, the large toothed ring and the detection circular opening are coaxially rotatably arranged, a probe mounting frame is fixedly connected to one side of the large toothed ring, a detector is fixedly connected to the other side of the large toothed ring, the probe mounting frame and the detector are symmetrically arranged, an annular frame is fixedly connected inside the probe mounting frame, a cable belt is arranged inside the annular frame, an arc groove for sliding of the cable belt is opened in the middle of the annular frame, a plurality of sliding shafts are fixedly connected to the middle of the arc groove, one end of the cable belt is in contact with the inner wall of the arc groove, the other end of the cable belt is slidably arranged with the sliding shaft, and the shape of the cable belt is a flat belt.

[0005] Preferably, triangular plates are fixedly connected to both sides of the probe mounting frame and the detector, the triangular plates are fixedly connected to the large gear ring, a plurality of mounting ports are opened in the probe mounting frame, a plurality of connection ports are opened through the side surfaces of the probe mounting frame which are perpendicular to the mounting ports, the cable belt is plugged into the connection ports, and a plurality of universal wheels are rotatably connected to the bottom of the base frame.

[0006] Preferably, the annular frame includes a plurality of arc-shaped track plates, and the plurality of arc-shaped track plates are fixedly connected to one side of the probe mounting frame. The arc-shaped track plates are threadedly connected with positioning bolts, and the probe mounting frame is provided with a plurality of threaded blind holes compatible with the positioning bolts. The arc-shaped track plates are arranged on the outer side of the large gear ring.

[0007] Preferably, the middle support frame is fixedly connected to a driving motor on the side away from the large gear ring, the driving end of the driving motor is fixedly connected to a driving rod, a through hole is penetrated through the middle support frame for the driving rod to pass through, the end of the driving rod extending outside the through hole is fixedly connected to a driving gear, and the driving gear is meshingly connected to the large gear ring.

[0008] Preferably, two side frames are fixedly connected to the top of the base frame, and the side frames are fixedly connected to the middle support frame. The two side frames are symmetrically arranged, a handle is fixedly connected to one side of the side frame, and a reinforcing plate is fixedly connected to the middle of the side frame, and the reinforcing plate is fixedly connected to the middle support frame.

[0009] The folding and unfolding auxiliary mechanism of the double rotating frame of the cone beam CT machine includes an arc-shaped rack fixedly connected to one side of the middle support frame, a short-circuit rod is slidably connected to one side of the middle support frame, a reset motor is fixedly connected to the short-circuit rod, a driving end of the reset motor is fixedly connected to a travel gear, the travel gear is meshed and connected with the arc-shaped rack, a connecting rod is fixedly connected to the short-circuit rod, one end of the connecting rod in contact with the cable belt is rotatably connected to a sliding roller, the sliding roller is slidably connected to the cable belt, both ends of the arc-shaped rack are fixedly connected to a stroke sensor, the stroke sensor corresponds to the position of the short-circuit rod, a controller is fixedly connected to the middle support frame, and the stroke sensor and the reset motor are both electrically connected to the controller.

[0010] Preferably, a travel rail plate is fixedly connected to one side of the arc-shaped rack, and grooves are provided on the inner and outer sides of the travel rail plate. A plurality of auxiliary pulleys are rotatably connected in the short-circuit rod, and the auxiliary pulleys include two discs and a cylindrical shaft integrally formed therewith. The two discs are fixedly connected by the cylindrical shaft, and the discs are slidably connected to the grooves.

[0011] Compared with the related art, the cone beam CT machine double rotating frame provided by the utility model has the following beneficial effects:

[0012] In the utility model, by changing the traditional single cable into a flat belt-shaped cable belt, the electrical contact area is increased, so that the electrical connection between the cable belt and the X-ray emitter is more stable, avoiding electromagnetic interference or vibration interference, and the flat belt-shaped cable belt is fitted with the annular frame, and when the cable belt is folded and unfolded, the auxiliary folding and unfolding mechanism is used to make surface contact with the cable belt and push it back in a flat manner to reset it, thereby reducing the bending and torsional strength of the cable belt when the rotating part moves, thereby reducing the wear of the cable belt and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a base frame in a double rotating gantry of a cone beam CT machine;

[0014] Figure 2 It is a structural schematic diagram of a large gear in a double rotating gantry of a cone beam CT machine;

[0015] Figure 3 It is a structural schematic diagram of a handle in a double rotating gantry of a cone beam CT machine;

[0016] Figure 4 for Figure 2 A magnified view of the structure at center A;

[0017] Figure 5 for Figure 2 A magnified view of the structure at point B.

[0018] Numbers in the figure: 1. Base frame; 2. Middle support frame; 3. Side frame; 4. Handle; 5. Probe mounting frame; 6. Driving gear; 7. Large gear ring; 8. Detector; 9. Universal wheel; 10. Triangle plate; 11. Cable belt; 12. Ring frame; 13. Driving motor; 14. Reinforcement plate; 15. Travel gear; 16. Auxiliary roller; 17. Short-circuit rod; 18. Arc rack; 19. Travel rail plate; 20. Reset motor; 21. Travel sensor; 22. Sliding shaft; 23. Auxiliary pulley. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present utility model, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] See also Figure 1-Figure 5 , an embodiment provided by the utility model:

[0023] A double rotating frame of a cone beam CT machine comprises a base frame 1, a middle support frame 2 is fixedly connected to the top of the base frame 1, a detection circular opening is opened in the middle of the middle support frame 2, a large gear ring 7 is rotatably connected in the middle support frame 2, the large gear ring 7 and the detection circular opening are coaxially rotatably arranged, a probe mounting frame 5 is fixedly connected to one side of the large gear ring 7, a detector 8 is fixedly connected to the other side of the large gear ring 7, the probe mounting frame 5 and the detector 8 are symmetrically arranged, the large gear ring 7 is used to drive the probe mounting frame 5 to rotate from an initial position to an angle position of 320 degrees, an annular frame 12 is fixedly connected in the probe mounting frame 5, a cable belt 11 is arranged in the annular frame 12, an arc groove for sliding of the cable belt 11 is opened in the middle of the annular frame 12, a plurality of sliding shafts 22 are fixedly connected in the middle of the arc groove, one end of the cable belt 11 is in contact with the inner wall of the arc groove, and the cable belt 11 is connected to the inner wall of the arc groove. The other end of the cable belt 11 is slidably arranged with the sliding shaft 22. The shape of the cable belt 11 is a flat belt. By changing the traditional single cable line into a flat belt of the cable belt 11, the electrical contact area is increased, so that the electrical connection between the cable belt 11 and the emitter that emits X-rays is more stable, avoiding electromagnetic interference or vibration interference. The traditional 360-degree rotation mode is replaced by the cable belt 11 rotating from the initial position to the 320-degree angle position along with the probe mounting frame 5, so that the flat belt-shaped cable belt 11 is fitted with the annular frame 12, and when the cable belt is retracted and extended, the auxiliary mechanism for retracting and extending is used to contact the cable belt 11 and push it back in a flat manner to reset it, thereby reducing the bending and torsional strength of the cable belt 11 as the rotating part moves, thereby reducing the wear of the cable belt 11 and extending its service life;

[0024] See also Figure 1 In this embodiment, both sides of the probe mounting frame 5 and the detector 8 are fixedly connected with a triangular plate 10, and the triangular plate 10 is fixedly connected to the large gear ring 7. A plurality of mounting ports are provided in the probe mounting frame 5, and a plurality of connection ports are provided through the side of the probe mounting frame 5 perpendicular to the mounting ports. The cable belt 11 is plugged into the connection port, and a plurality of universal wheels 9 are rotatably connected to the bottom of the base frame 1, which enhances the overall structural strength of the probe mounting frame 5 and the detector 8, and also improves the connection stability between the probe mounting frame 5, the detector 8 and the large gear ring 7. The probe mounting frame 5 is used to install an X-ray emitter, and the detector 8 is used to install a detector adapted to the X-ray emitter;

[0025] See also Figure 1 , Figure 2 , Figure 4In this embodiment, the annular frame 12 includes a plurality of arc-shaped track plates, which are all fixedly connected to one side of the probe mounting frame 5. The arc-shaped track plates are threadedly connected with positioning bolts. The probe mounting frame 5 is provided with a plurality of threaded blind holes adapted to the positioning bolts. The arc-shaped track plates are arranged on the outer side of the large gear ring 7. By dividing the annular frame 12 into a plurality of arc-shaped track plates, the practicability of the annular frame 12 is improved, and it can be applied to CT machines of different sizes, and the installation difficulty is reduced. When the annular frame 12 is installed as a whole, it is difficult for a single person to keep it fixed in place for a long time. By dividing it into a plurality of arc-shaped track plates, the area can be pre-drawn and set and then installed according to the area, that is, one person can easily complete the installation work.

[0026] It should be noted that a driving motor 13 is fixedly connected to the side of the middle support frame 2 away from the large gear ring 7, and a driving end of the driving motor 13 is fixedly connected to a driving rod. A through hole for the driving rod to pass through is provided in the middle support frame 2, and one end of the driving rod extending outside the through hole is fixedly connected to a driving gear 6, which is meshed with the large gear ring 7. The driving gear 6 can be driven to rotate by starting the driving motor 13, and the meshing between the driving gear 6 and the large gear ring 7 can be used to rotate and drive the probe mounting frame 5 and the detector 8 to rotate at the same time, thereby changing their angular positions.

[0027] The scanning part of the CT machine needs to be used with a sliding scanning bed in the existing technology. When the patient is on the scanning bed of the CT machine, the X-ray emitter will emit a spiral X-ray beam to the patient's body. When these X-ray beams penetrate the patient's body, they will produce different degrees of attenuation according to the density and absorption capacity of different tissues inside the body. The detector inside the CT machine will receive these X-rays after passing through the body and convert the received signals into digital signals.

[0028] CT machines measure and record the attenuation values ​​of X-ray beams passing through the patient's body at different angles, and use computers to perform complex calculations and reconstruction to produce accurate cross-sectional images. These images can clearly show the various tissues and organs inside the body, helping doctors diagnose, locate and formulate treatment plans for diseases.

[0029] See also Figure 1 , Figure 2 In this embodiment, two side frames 3 are fixedly connected to the top of the base frame 1, and the side frames 3 are fixedly connected to the middle support frame 2. The two side frames 3 are symmetrically arranged, and a handle 4 is fixedly connected to one side of the side frame 3. A reinforcing plate 14 is fixedly connected to the middle of the side frame 3, and the reinforcing plate 14 is fixedly connected to the middle support frame 2. Through the arrangement of the side frames 3 and the reinforcing plates 14, supporting force can be provided for the middle support frame 2, thereby improving the connection stability between the middle support frame 2 and the base frame 1.

[0030] The folding and unfolding auxiliary mechanism of the double rotating gantry of the cone beam CT machine includes an arc-shaped rack 18 fixedly connected to one side of the middle support frame 2, a short-circuit rod 17 is slidably connected to one side of the middle support frame 2, a reset motor 20 is fixedly connected to the short-circuit rod 17, a driving end of the reset motor 20 is fixedly connected to a travel gear 15, the travel gear 15 is meshedly connected with the arc-shaped rack 18, a connecting rod is fixedly connected to the short-circuit rod 17, one end of the connecting rod in contact with the cable belt 11 is rotatably connected to a sliding roller 16, the sliding roller 16 is slidably connected to the cable belt 11, both ends of the arc-shaped rack 18 are fixedly connected to a travel sensor 21, the travel sensor 21 corresponds to the position of the short-circuit rod 17, a controller is fixedly connected to the middle support frame 2, the travel sensor 21 and the reset motor 20 are electrically connected to the controller, and when the line is retracted, the drive motor 13 drives the drive. The gear 6 drives the large gear ring 7 to rotate and reset. During this process, the reset motor 20 is started, and the reset motor 20 drives the walking gear 15 to move and reset on the arc rack 18, so that the connecting rod connected to the short-circuit rod 17 moves and drives the sliding roller 16 to move. The sliding roller 16 and the cable belt 11 are in surface contact and push it back in a flat manner to reset it. When the short-circuit rod 17 moves to the other end of the arc rack 18, the travel sensor 21 at this position detects its position and transmits a signal to the controller, and the controller stops the reset motor 20. At this time, the part of the cable belt 11 at this position has a certain weight, and the remaining part can be reset by using its own weight to sag, avoiding the occurrence of stress concentration. After providing an auxiliary force for a certain displacement distance, the cable belt 11 can reset itself by its own weight, that is, the winding is completed.

[0031] See also Figure 4 In this embodiment, a travel rail plate 19 is fixedly connected to one side of the arc-shaped rack 18, and grooves are provided on the inner and outer sides of the travel rail plate 19. A plurality of auxiliary pulleys 23 are rotatably connected in the short-circuit rod 17. The auxiliary pulley 23 includes two discs and a cylindrical shaft integrally formed therewith. The two discs are fixedly connected by the cylindrical shaft, and the discs are slidably connected to the grooves. By clamping the plurality of discs in the grooves on the inner and outer sides of the travel rail plate 19 and sliding, the freedom of the short-circuit rod 17 can be limited, so that the short-circuit rod 17 can only move in the groove, thereby improving the connection stability between the short-circuit rod 17 and the travel rail plate 19.

[0032] Working principle: when the position of the X-ray emitter and the detector needs to be adjusted, the driving motor 13 is started to drive the driving gear 6 to rotate, and the meshing of the driving gear 6 and the large gear ring 7 drives the large gear ring 7 to rotate. When the large gear ring 7 rotates, the probe mounting frame 5, the detector 8, the X-ray emitter and the detector connected in sequence will move and adjust their installation angle position. At this time, the reset motor 20 is started to utilize the meshing of the traveling gear 15 and the arc-shaped rack 18 to move the traveling gear 15 on the arc-shaped rack 18, and move the short-circuit rod 17, the connecting rod and the sliding roller 16 connected in sequence in the direction where the cable belt 11 is pulled and moved, that is, the line unfolding operation, until the travel sensor 21 at one end of the arc-shaped rack 18 detects the position of the short-circuit rod 17 and transmits a signal to the controller, and the controller controls the reset motor 20 to power off and stop. When winding the line, the reset motor 20 is turned off and the reset motor 20 is turned off and stopped. The overdrive motor 13 drives the drive gear 6 to drive the large gear ring 7 to rotate and reset. During this process, the reset motor 20 is started, and the reset motor 20 drives the walking gear 15 to move and reset on the arc rack 18, so that the connecting rod connected to the short-circuit rod 17 moves and drives the sliding roller 16 to move, and the sliding roller 16 and the cable belt 11 are in surface contact and push it back in a flat manner to reset it. When the short-circuit rod 17 moves to the other end of the arc rack 18, the travel sensor 21 at this position detects its position and transmits a signal to the controller, and the controller stops the reset motor 20. At this time, the part of the cable belt 11 at this position has a certain weight, and the remaining part can be reset by using its own weight to sag, thereby avoiding the occurrence of stress concentration. After providing an auxiliary force for a certain displacement distance, the cable belt 11 can reset itself by using its own weight, and the winding is completed.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cone beam CT machine with a double rotating gantry, characterized in that: The invention comprises a base frame (1), the top of the base frame (1) is fixedly connected to a middle support frame (2), the middle of the middle support frame (2) is penetrated by a detection circular opening, a large toothed ring (7) is rotatably connected inside the middle support frame (2), the large toothed ring (7) and the detection circular opening are coaxially rotatably arranged, one side of the large toothed ring (7) is fixedly connected to a probe mounting frame (5), the other side of the large toothed ring (7) is fixedly connected to a detector (8), the probe mounting frame (5) and the detector (8) are symmetrically arranged The probe mounting frame (5) is fixedly connected to an annular frame (12), a cable belt (11) is arranged in the annular frame (12), an arc groove for sliding the cable belt (11) is opened in the middle of the annular frame (12), a plurality of sliding shafts (22) are fixedly connected in the middle of the arc groove, one end of the cable belt (11) is in contact with the inner wall of the arc groove, and the other end of the cable belt (11) is slidably arranged with the sliding shaft (22), and the shape of the cable belt (11) is a flat belt.

2. The cone beam CT machine double rotating gantry according to claim 1, characterized in that: The probe mounting frame (5) and the detector (8) are both fixedly connected with a triangular plate (10) on both sides, and the triangular plate (10) is fixedly connected to the large gear ring (7). The probe mounting frame (5) is provided with a plurality of mounting openings, and the side surface of the probe mounting frame (5) perpendicular to the mounting openings is provided with a plurality of connection openings, the cable belt (11) is plugged into the connection openings, and the bottom of the base frame (1) is rotatably connected with a plurality of universal wheels (9).

3. The cone beam CT machine double rotating gantry according to claim 1, characterized in that: The annular frame (12) comprises a plurality of arc-shaped track plates, each of which is fixedly connected to one side of the probe mounting frame (5), wherein the arc-shaped track plates are internally threadedly connected with a positioning bolt, and the probe mounting frame (5) is provided with a plurality of threaded blind holes adapted to the positioning bolt, and the arc-shaped track plates are arranged on the outside of the large gear ring (7).

4. The cone beam CT machine double rotating gantry according to claim 1, characterized in that: A driving motor (13) is fixedly connected to the side of the middle support frame (2) away from the large gear ring (7), and a driving rod is fixedly connected to the driving end of the driving motor (13). A through hole for the driving rod to pass through is provided in the middle support frame (2), and one end of the driving rod extending outside the through hole is fixedly connected to a driving gear (6), and the driving gear (6) is meshedly connected to the large gear ring (7).

5. The cone beam CT machine double rotating gantry according to claim 1, characterized in that: Two side frames (3) are fixedly connected to the top of the base frame (1), and the side frames (3) are fixedly connected to the middle support frame (2). The two side frames (3) are symmetrically arranged, and a handle (4) is fixedly connected to one side of the side frame (3). A reinforcing plate (14) is fixedly connected to the middle of the side frame (3), and the reinforcing plate (14) is fixedly connected to the middle support frame (2).

6. A stowage and extension auxiliary mechanism for a double rotating gantry of a cone beam CT machine according to any one of claims 1 to 5, characterized in that: The invention comprises an arc-shaped rack (18) fixedly connected to one side of a middle support frame (2); a short-circuit rod (17) is slidably connected to one side of the middle support frame (2); a reset motor (20) is fixedly connected inside the short-circuit rod (17); a driving end of the reset motor (20) is fixedly connected to a travel gear (15); the travel gear (15) is meshingly connected to the arc-shaped rack (18); a connecting rod is fixedly connected inside the short-circuit rod (17); an end of the connecting rod in contact with the cable belt (11) is rotatably connected to a sliding roller (16); the sliding roller (16) is slidably connected to the cable belt (11); both ends of the arc-shaped rack (18) are fixedly connected to a travel sensor (21); the travel sensor (21) corresponds to the position of the short-circuit rod (17); a controller is fixedly connected inside the middle support frame (2); the travel sensor (21) and the reset motor (20) are both electrically connected to the controller.

7. The cone beam CT machine double rotating gantry stowage and extension auxiliary mechanism according to claim 6, characterized in that: A travel rail plate (19) is fixedly connected to one side of the arc-shaped rack (18), and grooves are provided on the inner and outer sides of the travel rail plate (19). A plurality of auxiliary pulleys (23) are rotatably connected inside the short-circuit rod (17), and the auxiliary pulleys (23) include two discs and a cylindrical shaft integrally formed therewith, the two discs being fixedly connected via the cylindrical shaft, and the discs are slidably connected to the grooves.

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