CN110916698B

CN110916698B - Self-locking CT frame and vehicle-mounted CT machine

Info

Publication number: CN110916698B
Application number: CN201911121269.4A
Authority: CN
Inventors: 于军; 刘莹
Original assignee: Neusoft Medical Systems Co Ltd
Current assignee: Neusoft Medical Systems Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2023-05-02
Anticipated expiration: 2039-11-15
Also published as: CN110916698A

Abstract

The application provides a from lock CT frame and on-vehicle type CT machine, from lock CT frame is used for on-vehicle type CT machine, and it includes fixed equipment in the main frame of mobile vehicle and with the rotatable slope frame of being connected of main frame, be equipped with the locking control system of adaptation in main frame and the slope frame, locking control system includes keyway, bolt, drive arrangement and position sensor, the keyway set up in the main frame, the bolt set up in the slope frame and with keyway adaptation, drive arrangement set up in the slope frame is used for the drive the bolt changes between locking position and unblock position, position sensor is used for detecting the position in order to confirm the locking and the unblock position of bolt and keyway of bolt. The self-locking device has the advantages that the self-locking of the inclined rack and the main rack is realized through the arrangement of the locking control system, the structure is simple, the performance is reliable, and the improvement of the performance of the vehicle-mounted CT machine is facilitated.

Description

Self-locking CT frame and vehicle-mounted CT machine

Technical Field

The invention relates to the field of medical equipment, in particular to a self-locking CT frame and a vehicle-mounted CT machine.

Background

CT belongs to precise image detection equipment, and has severe environmental requirements, so that timeliness and accuracy of diagnosis of doctors in many medical practice scenes are limited, such as areas with underdeveloped medical resources, disaster relief sites, field hospitals, frontier areas, high-end personalized medical services and the like. Thus, as a mobile "scan room," vehicle-mounted mobile CT has its unique value.

In order to prevent the damage of the rack, especially the tilting rack, caused in the long-term transportation process, the prior solution is to install a connecting rod near the rotating shaft, and connect with the tiltable part and the rack part through bolts, and the three form a stable triangle, thereby realizing the protection of the tilting mechanism; after the equipment is installed, the connecting rod is manually dismantled, so that the vehicle-mounted CT machine with limited internal operation space is inconvenient to use.

Therefore, a frame structure with a self-locking function and a simple structure are needed.

Disclosure of Invention

The invention provides a self-locking CT frame and a vehicle-mounted CT machine.

According to a first aspect of the present application, there is provided a self-locking CT gantry for a vehicle-mounted CT machine, comprising a main frame fixedly assembled to a moving vehicle and an inclined gantry rotatably connected to the main frame, wherein the main frame and the inclined gantry are provided with an adaptive locking control system, the locking control system comprises a pin seat, a bolt, a driving device and a position sensor, the pin seat is arranged on the main frame, the bolt is arranged on the inclined gantry and is matched with the pin seat, the driving device is arranged on the inclined gantry and is used for driving the bolt to switch between a locking position and an unlocking position, and the position sensor is used for detecting the position of the bolt so as to determine the locking and unlocking positions of the bolt and the pin seat.

Further, the position sensor includes a sensing end disposed on the main frame or the tilting frame and a sensed end disposed on the tilting frame or the main frame.

Further, the sensing end is a photoelectric switch, the sensed end is a metal sheet with a slit, and when the photoelectric switch beam passes through the slit of the sensed end, the optimal combination position of the bolt and the pin seat is determined to execute the locking and unlocking program.

Further, a mounting seat is arranged on the inclined rack, a first assembly part for accommodating the driving device and a sensor support are arranged on the mounting seat, a first position sensor and a second position sensor are arranged on the sensor support, and a sensor pressure plate capable of being abutted against the first position sensor and the second position sensor is arranged at the top end of the bolt.

Further, an assembly hole is formed in the center of the sensor pressure plate, the top end of the bolt penetrates through the assembly hole and is assembled and fixed with the sensor pressure plate through a screw, the bolt and the pin seat are in an unlocking state when the sensor pressure plate abuts against the first position sensor, and the bolt and the pin seat are in a locking state when the sensor pressure plate abuts against the second position sensor.

Further, be equipped with on the mount pad with the second equipment portion of first equipment portion intercommunication, be equipped with the thread bush in the second equipment portion, the bottom of bolt with the thread bush adaptation forms the screw thread pair, be equipped with connecting screw in the keyway, the bottom of bolt be equipped with connecting screw matched screw hole.

Further, the driving device is a worm gear speed reducing motor, a connecting key capable of sliding along the axial direction is arranged in an output hole of the worm gear speed reducing motor, the connecting key is fixedly assembled with the bolt, a through hole corresponding to the output hole of the worm gear speed reducing motor is arranged at the top of the mounting seat, and the bolt penetrates through the through hole, the output hole of the motor and the thread bush from top to bottom.

Further, a first accommodating part and a second accommodating part which are communicated are arranged on the pin seat, a jacking spring is arranged in the first accommodating part, the connecting screw is arranged in the second accommodating part, the bottom of the connecting screw abuts against the jacking spring, and the connecting screw and the bolt are coaxially arranged.

Further, the sensor bracket comprises a fixing part assembled with the mounting seat and an assembling part perpendicular to the fixing part and arranged above the mounting seat in parallel, and the first position sensor and the second position sensor are arranged on the assembling part in parallel along the axial direction.

Further, a first inclined surface is arranged at the bottom of the mounting seat, a second inclined surface matched with the first inclined surface is arranged at the top of the pin seat, and when the bolt and the pin seat are in a locking state, the first inclined surface is attached to the second inclined surface.

According to a second aspect of the present application, there is provided a vehicle-mounted CT machine comprising a self-locking CT gantry as described above.

According to the technical scheme, the adaptive locking control system is arranged on the main frame and the inclined bracket of the CT machine, so that the inclined frame can be automatically locked and unlocked, and the structure is simple and the performance is reliable.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a perspective view of a self-locking CT gantry according to an embodiment of the present application;

FIG. 2 is a schematic perspective view of an embodiment of the present application in an unlocked state of a lock control system;

FIG. 3 is a front view of an embodiment of the present application in an unlocked state of a lock control system;

FIG. 4 is a right side view of an embodiment of the present application in an unlocked state of a lock control system;

FIG. 5 is a schematic cross-sectional view taken along the direction A-A of FIG. 4;

FIG. 6 is a schematic perspective view of a lock state of a lock control system according to an embodiment of the present application;

FIG. 7 is a front view of a lock control system in a locked state according to an embodiment of the present application;

FIG. 8 is a right side view of a lock state of a lock control system according to an embodiment of the present application;

FIG. 9 is a schematic cross-sectional view of FIG. 8 taken along the direction A-A;

fig. 10 is an enlarged partial schematic view of a position sensor of the present application.

Reference numerals:

self-locking CT gantry 100

Main frame 1 spindle 10

Tilting frame 2

Through hole 202 of first assembly part 201 of mounting seat 20

Second assembly 203 threaded sleeve 204 sensor mount 21

First position sensor 22 of holding part 210 assembling part 211

Second position sensor 23 sensor platen 24 assembly hole 240

First inclined surface 25

Lock control system 3

Bolt 30 threaded hole 301 bolt seat 31

The first accommodating part 310 abuts against the second accommodating part 312 of the spring 311

Second inclined surface 314 of connecting screw 313 drives device 32

Output aperture 320

Sensor end 330 of connecting key 321 position sensor 33

Sensed end 331

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the invention. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

The following describes a self-locking CT frame and a vehicle-mounted CT machine in detail with reference to the accompanying drawings. The features of the examples and embodiments described below may be combined with each other without conflict.

Referring to fig. 1 to 10, a vehicle-mounted CT machine of the present application at least includes a CT host and a self-locking CT gantry 100. The CT host is provided with a control system, and the structural arrangement of the CT host is basically the same as the component arrangement of a conventional CT host, and the present application is not particularly described.

Specifically, the self-locking CT machine frame 100 is used for a vehicle-mounted CT machine, and comprises a main frame 1 fixedly assembled on a moving vehicle and an inclined machine frame 2 rotatably connected with the main frame 1, wherein the main frame 1 and the inclined machine frame 2 are provided with an adaptive locking control system 3, the locking control system 3 comprises a pin seat 31, a pin 30, a driving device 32 and a position sensor 33, the pin seat 31 is arranged on the main frame 1, the pin 30 is arranged on the inclined machine frame 2 and is adaptive to the pin seat 31, the driving device 32 is arranged on the inclined machine frame 2 and is used for driving the pin 30 to switch between a locking position and an unlocking position, and the position sensor 33 is used for detecting the position of the pin 30 so as to determine the locking and unlocking positions of the pin 30 and the pin seat 31. In the present case the tilting frame 2 is rotatably connected to the main frame 1 via a rotation shaft 10. The rotating shaft 10 is arranged on the main frame 1. The self-locking CT gantry 100 performs locking and unlocking actions of the tilting gantry 2 under the control of the control unit. The control components of the self-locking CT gantry 100 can communicate with the CT host, issuing commands and informing of status to each other. Preferably, the control components of the self-locking CT gantry 100 are fully integrated into the host control system.

In one embodiment, the position sensor 33 includes a sensing end 330 disposed on the main frame 1 and a sensed end 331 disposed on the tilting frame 2. Indeed, the positions of the sensing end 330 and the sensed end 331 may be interchanged. In another embodiment, the sensing end 330 is disposed on the tilting frame 2, and the sensed end 331 is disposed on the main frame 1. Preferably, the sensing end 330 is a photoelectric switch, the sensed end 331 is a metal plate with a slit, and when the photoelectric switch beam passes through the slit of the sensed end 331, it is determined that the latch 30 and the latch seat 31 are at the optimal combination position to perform the locking and unlocking procedure. Indeed, the position sensor 33 signal may be replaced by other sensor signals having similar functions within the CT machine.

The purpose of the position sensor 33 is to determine the optimal coupling position of the plug pin 30 with the pin socket 31, in which case the locking effect is optimal. The latch 30 must be aligned with the pin holder 31 when locked. Before the latch 30 is combined with the latch seat 31, the tilting frame 2 rotates slowly, and when the sensing end 330 of the position sensor 33 detects that the sensed end 331 of the position sensor 33 is at a desired position, the tilting frame 2 stops rotating, and the desired position is equal to the optimal combination position of the latch 30 and the latch seat 31. The latch 30 is then actuated to engage the pin seat 31 to perform the locking action. Preferably, in order to improve positioning accuracy, the position sensor 33 is disposed at a position farthest from the rotation shaft 10.

Specifically, the inclined frame 2 is provided with a mounting seat 20. The mounting base 20 is provided with a first assembly portion 201 for accommodating the driving device 32 and a sensor holder 21. The mounting base 20 has a -shaped main body including a top wall, a side wall and a bottom wall connected in sequence, and the first assembling portion 201 is formed by surrounding the top wall, the side wall and the bottom wall to facilitate assembling of the driving device 32. The sensor bracket 21 is provided with a first position sensor 22 and a second position sensor 23, and the top end of the bolt 30 is provided with a sensor pressure plate 24 which can be abutted against the first position sensor 22 and the second position sensor 23. The sensor holder 21 is assembled to the side wall. In an embodiment, the sensor bracket 21 includes a holding portion 210 assembled with the mounting base 20 and an assembling portion 211 perpendicular to the holding portion 210 and disposed in parallel above the mounting base 20. The first position sensor 22 and the second position sensor 23 are disposed in parallel in the axial direction on the assembly portion 211. In an embodiment, the holding portion 210 is integrally formed with the assembling portion 211, and the assembling portion 211 is formed by extending vertically from the top end of the holding portion 210. In another embodiment, the fixing portion 210 and the assembling portion 211 are formed by assembling two independent pieces, and the two pieces are perpendicular to each other after assembling.

The center of the sensor platen 24 is provided with an assembly hole 240. The top end of the latch 30 passes through the assembly hole 240 and is assembled and fixed with the sensor platen 24 by a screw. The sensor pressure plate 24 triggers the first position sensor 22 and the second position sensor 23 by pressing to determine an unlocked state and a locked state. Specifically, when the sensor platen 24 abuts against the first position sensor 22, the latch 30 and the latch seat 31 are in an unlocked state; the latch 30 and the pin seat 31 are in a locked state when the sensor platen 24 abuts against the second position sensor 23.

The mounting base 20 is provided with a second assembly portion 203 communicating with the first assembly portion 201. A threaded sleeve 204 is disposed in the second assembly portion 203. The bottom end of the plug 30 is matched with the threaded sleeve 204 to form a threaded pair, and a connecting screw 313 is arranged in the pin seat 31. The bottom end of the latch 30 is provided with a threaded hole 301 matching with the connecting screw 313 to lock the two.

The pin seat 31 is provided with a first accommodating portion 310 and a second accommodating portion 312 which are communicated with each other. The first accommodating portion 310 is provided with a tightening spring 311. The connection screw 313 is disposed in the second accommodating portion 312, the bottom of the connection screw abuts against the tightening spring 311, and the connection screw 313 is disposed coaxially with the latch 30. The shape of the pin 30 and the pin seat 31 in the present application is not limited to a standard cylindrical structure, but may be other geometric shapes with opposite convex and concave, and the convex and concave parts contact when combined. And will not be described in detail herein.

Before locking, the connecting screw 313 is coaxial with the bolt 30 when the bolt 30 is in the optimal coupling position with the pin holder 31. The connection screw 313 is jacked up by the jacking spring 311 below the connection screw 313, so that the bottom end of the connection screw is higher than the end surface of the bottom of the pin seat 31, and the connection screw 313 and the plug pin 30 are locked in a butt joint manner.

In one embodiment, the driving device 32 is a worm gear motor. A connecting key 321 capable of sliding along the axial direction is arranged in the output hole 320 of the worm gear speed reducing motor. The connecting key 321 is fixedly assembled with the plug 30. The top of the mounting base 20 is provided with a through hole 202 corresponding to the output hole 320 of the worm gear reduction motor. The plug 30 passes through the through hole 202, the output hole 320 of the motor and the threaded sleeve 204 from top to bottom to be assembled on the mounting base. The end of the bolt 30 is provided with a threaded hole 301, and the connecting screw 313 can extend into the threaded hole 301 to be matched with the bolt 30.

The bottom of the mounting base 20 is provided with a first inclined surface 25. The top of the pin boss 31 is provided with a second inclined surface 314 which is adapted to the first inclined surface 25. When the plug 30 and the pin seat 31 are in the locked state, the first inclined surface 25 is attached to the second inclined surface 314.

The locking control system 3 has the following working principle: after the sensor platen 24 triggers the first position sensor 22 to receive the locking command, the worm gear speed reducing motor drives the latch 30 to rotate. The threaded sleeve 204 pushes the plug pin 30 to move towards the pin seat 31, and the connecting key 321 axially slides while rotating in the output hole 320 of the worm gear speed reducing motor; the bolt 30 gradually enters the second accommodating part 312, and meanwhile, the connecting screw 313 is screwed into a threaded hole at the end part of the bolt 30 to realize connection; the sensor pressure plate 24 triggers the second position sensor 23, the worm gear motor stops rotating, the bolt 30 and the pin seat 31 complete locking, and the CT frame enters a locking state. When unlocking is needed, the worm gear speed reducing motor reversely rotates, the plug pin 30 reversely moves, namely upwards moves, the connecting screw 313 is screwed out of the threaded hole, the whole process is opposite to the locking process, and the description is omitted here. When the sensor platen 24 triggers the first position sensor 22, the latch 30 and the latch seat 31 complete locking and unlocking, and the CT gantry is in an unlocked state. The drive 32 must have a self-locking or force-retaining function in the present application. Indeed, the driving device 32 may further use a cylinder mechanism or a screw mechanism with a lift angle smaller than the friction angle, which is not described in detail in this application.

The self-locking method of the self-locking CT stand 100 of the present application comprises the following steps:

1. the CT host machine is powered off, and a control system of the host machine sends out a power-off locking command;

2. the control component of the CT rack receives a shutdown locking command sent by a control system of the host and sends a driving signal;

3. the inclined rack rotates, and after the detection end of the position sensor detects the detected end of the position sensor, the inclined rack stops rotating;

4. the control component of the CT frame sends out a locking actuating signal to drive the bolt and the bolt seat to approach, contact and combine, and then sends out a combining completion signal;

5. the control component of the tilting frame senses the combination completion signal of the driving bolt and the pin seat, interrupts the locking action signal and sends out a locking completion signal;

6. the CT host receives the locking completion signal and continues to complete the rest actions of shutdown.

The method for unlocking the self-locking CT stand comprises the following execution steps:

1. starting up the CT host, and sending out a starting-up unlocking command;

2. the control component of the tilting frame receives the starting-up unlocking command and sends out an unlocking actuating signal to drive the bolt and the pin seat to be separated; after separation is completed, sending a separation completion signal;

3. the control component of the inclined rack senses that the separation completion signal interrupts the unlocking action signal and sends out the unlocking completion signal;

4. and the CT host receives the unlocking completion signal and enters a standby state.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.

Claims

1. The utility model provides a from lock type CT frame for on-vehicle type CT machine, is characterized in that, including fixed equipment in main frame (1) of mobile vehicle and with main frame (1) rotatable coupling's slope frame (2), be equipped with locking control system (3) of adaptation on main frame (1) and the slope frame (2), locking control system (3) include keyway (31), bolt (30), drive arrangement (32) and position sensor (33), keyway (31) set up in main frame (1), bolt (30) set up in slope frame (2) and with keyway (31) adaptation, drive arrangement (32) set up in slope frame (2) are used for driving bolt (30) change between locking position and unlocking position, position sensor (33) are used for detecting the position of bolt (30) in order to confirm the locking and unlocking position of bolt (30) and keyway (31);

the position sensor (33) comprises a sensing end (330) arranged on the main frame (1) or the inclined frame (2) and a sensed end (331) arranged on the inclined frame (2) or the main frame (1); the sensing end (330) is a photoelectric switch, the sensed end (331) is a metal sheet with a slit, and when a photoelectric switch beam passes through the slit of the sensed end (331), the optimal combination position of the bolt (30) and the bolt seat (31) is determined to execute a locking and unlocking program; the tilting frame (2) is provided with a mounting seat (20), the mounting seat (20) is provided with a first assembly part (201) for accommodating the driving device (32) and a sensor bracket (21), the sensor bracket (21) is provided with a first position sensor (22) and a second position sensor (23), and the top end of the bolt (30) is provided with a sensor pressure plate (24) which can be propped against the first position sensor (22) and the second position sensor (23); an assembly hole (240) is formed in the center of the sensor pressure plate (24), the top end of the bolt (30) penetrates through the assembly hole (240) and is assembled and fixed with the sensor pressure plate (24) through a screw, when the sensor pressure plate (24) abuts against the first position sensor (22), the bolt (30) and the bolt seat (31) are in an unlocking state, and when the sensor pressure plate (24) abuts against the second position sensor (23), the bolt (30) and the bolt seat (31) are in a locking state; the mounting seat (20) is provided with a second assembly part (203) communicated with the first assembly part (201), a thread sleeve (204) is arranged in the second assembly part (203), the bottom end of the bolt (30) is matched with the thread sleeve (204) to form a thread pair, the inside of the bolt seat (31) is provided with a connecting screw (313), and the bottom end of the bolt (30) is provided with a threaded hole (301) matched with the connecting screw (313); the driving device (32) is a worm gear speed reducing motor, a connecting key (321) capable of sliding along the axial direction is arranged in an output hole (320) of the worm gear speed reducing motor, the connecting key (321) is fixedly assembled with the bolt (30), a through hole (202) corresponding to the output hole (320) of the worm gear speed reducing motor is formed in the top of the mounting seat (20), and the bolt (30) penetrates through the through hole (202), the output hole (320) of the motor and the thread bush (204) from top to bottom.

2. The self-locking CT gantry of claim 1, wherein the pin holder (31) is provided with a first accommodating portion (310) and a second accommodating portion (312) which are communicated, a tightening spring (311) is disposed in the first accommodating portion (310), the connecting screw (313) is disposed in the second accommodating portion (312) and the bottom thereof abuts against the tightening spring (311), and the connecting screw (313) and the bolt (30) are coaxially disposed.

3. The self-locking CT gantry according to any one of claims 1 to 2, wherein the sensor holder (21) comprises a holding portion (210) assembled with the mounting base (20) and an assembling portion (211) perpendicular to the holding portion (210) and disposed in parallel above the mounting base (20), and the first and second position sensors (22, 23) are disposed in parallel on the assembling portion (211) along an axial direction.

4. A self-locking CT gantry according to claim 3, characterized in that the bottom of the mounting base (20) is provided with a first inclined surface (25), the top of the pin base (31) is provided with a second inclined surface (314) adapted to the first inclined surface (25), and when the pin (30) and the pin base (31) are in a locked state, the first inclined surface (25) is attached to the second inclined surface (314).

5. A vehicle-mounted CT machine comprising a self-locking CT gantry according to any one of claims 1 to 4.