CN217740194U

CN217740194U - X-ray beam limiter

Info

Publication number: CN217740194U
Application number: CN202221584161.6U
Authority: CN
Inventors: 倪世远; 杨栋; 赖登先; 菅俊伟; 王宗宝; 刘建强
Original assignee: Careray Digital Medical System Co ltd
Current assignee: Careray Digital Medical System Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-04
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses an X-ray beam limiter, including outer frame and movable support, a movable support corresponds disposes a drive assembly, the middle part of movable support is equipped with the lead plate, the lead plate is used for sheltering from the ray that the ray source sent, drive assembly includes motor, drive screw and guide bar, motor and guide bar setting are in on the movable support, the output pivot of motor with drive screw gear drive, drive screw with the outer frame rotates to be connected, drive screw with movable support screw thread drive, movable support with the guide bar sliding connection; under the drive of the motor, the output rotating shaft drives the transmission screw rod to rotate so as to drive the movable support to slide along the guide rod. The utility model provides an X ray beam limiting device utilizes the rotary motion conversion that screw thread transmission will remove movable support for rectilinear motion, simplifies the inner structure of limit bundle greatly to make whole miniaturization and lightweight more.

Description

X-ray beam limiter

Technical Field

The utility model relates to a beam limiter equipment technical field especially relates to an X ray beam limiter.

Background

X-ray imaging is increasingly used in the fields of medical testing, industrial inspection, security inspection, and the like. The existing X-ray detection device generally utilizes a beam limiter to adjust the range of the radiation. Most of the conventional beam limiters have single function, are large in size and mass, are not favorable for light convenience of the whole equipment, and are not favorable for automation of the equipment due to the design of a movement mechanism.

The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application nor give technical teaching; the above background should not be used to assess the novelty or inventiveness of the present application in the event that there is no clear evidence that the above disclosure has been made prior to the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides an X-ray beam limiter. The technical scheme is as follows:

the utility model provides an X-ray beam limiter, including outer frame and movable support, a movable support corresponds disposes a drive assembly, the middle part of movable support is equipped with the lead plate, the lead plate is used for sheltering from the ray that the ray source sent, drive assembly includes motor, drive screw and guide bar, motor and guide bar set up on the outer frame, the output pivot of motor with drive screw gear drive, drive screw with outer frame rotation connection, drive screw with movable support screw thread drive, movable support with guide bar sliding connection;

under the drive of the motor, the output rotating shaft drives the transmission screw to rotate so as to drive the movable support to slide along the guide rod.

Furthermore, the movable support comprises two upper-layer movable supports which are arranged in parallel, and two groups of driving assemblies are correspondingly configured to serve as upper-layer driving assemblies; two sets of upper drive assemblies correspond and distribute a set of opposite side of outer frame, and the guide bar parallel arrangement that two sets of upper drive assemblies correspond, the both ends of upper strata moving support respectively with a guide bar sliding connection.

Furthermore, the movable support also comprises two lower-layer movable supports which are arranged in parallel, and two groups of driving assemblies are additionally and correspondingly configured to serve as lower-layer driving assemblies; two sets of lower floor's drive assembly correspond the distribution and are in another group of the outer frame is to the limit, and the guide bar parallel arrangement that two sets of lower floor's drive assembly correspond, the both ends of lower floor's movable support respectively with a guide bar sliding connection.

Furthermore, one transmission screw is in threaded transmission with one upper layer moving support and is in sliding connection with the other upper layer moving support.

Further, the range of an included angle between the moving direction of the upper-layer moving support and the moving direction of the lower-layer moving support is 85 degrees to 90 degrees.

Furthermore, the guide rod is a guide shaft, and the movable support is provided with a linear bearing matched with the guide shaft.

Furthermore, the guide rod is provided with a sliding groove along the length direction of the guide rod, and the movable support is provided with a sliding block matched with the sliding groove.

Furthermore, the axis of the output rotating shaft, the axis of the guide rod and the axis of the transmission screw are parallel.

Further, the outer frame is provided with a photoelectric switch at a safety limit position of a moving path of the moving support, the photoelectric switch is electrically connected with the motor and is configured to trigger the motor to stop running, and the moving support is provided with a baffle; the movable support moves to the safety limit position, and the blocking piece covers the photoelectric switch, so that the photoelectric switch triggers the motor to stop running.

Furthermore, the end part of the movable support is provided with a connecting part extending towards the ray source direction, and the transmission screw penetrates through the connecting part and is in threaded transmission with the connecting part.

The utility model provides a beneficial effect that technical scheme brought as follows: utilize screw drive to change the rotary motion of moving movable support for rectilinear motion, simplify the inner structure of restriction greatly to make whole miniaturization and lightweight more, portable transport.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.

Fig. 1 is a schematic diagram of a closed state of an X-ray beam limiter provided by an embodiment of the present invention;

fig. 2 is a schematic diagram of a half-open state of an X-ray beam limiter provided by an embodiment of the present invention;

fig. 3 is a schematic diagram of a fully open state of the X-ray beam limiter according to an embodiment of the present invention.

Fig. 4 is a schematic disassembled view of an internal structure of an X-ray beam limiter provided by an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is a schematic structural view of an upper movable lead window of an X-ray beam limiter provided by an embodiment of the present invention;

fig. 7 is a schematic structural view of a lower movable lead window of an X-ray beam limiter according to an embodiment of the present invention.

Wherein the reference numerals include: the device comprises an outer frame, 2 moving supports, 21 upper moving supports, 22 lower moving supports, 3 driving components, 31 motors, 311 driving wheels, 32 driving screws, 321 driven wheels, 33 guide rods, 4 lead plates, 5 linear bearings, 6 retaining pieces, 7 photoelectric switches, 8-E type retaining rings and 9 supporting bearings.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

In an embodiment of the present invention, an X-ray beam limiter is provided, referring to fig. 1, which comprises an outer frame 1 and a movable support 2, wherein the outer frame 1 is formed by bending a metal plate and then welded at the vertical edges of four corners, so as to improve the overall rigidity of the frame; referring to fig. 2 and 3, a driving assembly 3 is correspondingly configured on one movable support 2, the driving assembly 3 can drive the corresponding movable support 2 to make a linear motion, a lead plate 4 is disposed in the middle of the movable support 2, the lead plate 4 can be fixed on the movable support 2 through glue, the lead plate 4 is used for shielding rays emitted by a ray source, the driving assembly 3 includes a motor 31, a transmission screw 32 and a guide rod 33, and the motor 31, the transmission screw 32 and the guide rod 33 are mounted on the outer frame 1.

Referring to fig. 4 and 5, the output rotating shaft of the motor 31 is in gear transmission with the transmission screw 32, the motor 31 is mounted on the outer frame 1 through a screw, the output rotating shaft of the motor 31 is mounted with a driving wheel 311 in gear transmission, a driven wheel 321 in gear transmission is mounted on the transmission screw 32, and the motor 31 is in gear transmission with the transmission screw 31, so as to drive the transmission screw 31 to rotate.

The drive screw 32 with outer frame 1 rotates to be connected, and outer frame 1 supports drive screw 32 through support bearing 9 to use the flange screw to carry out axial spacing to drive screw 32, drive screw 32 with remove the screw-thread transmission of support 2, remove support 2 with guide bar 33 sliding connection. The axis of the output rotating shaft, the axis of the guide rod 33 and the axis of the transmission screw 32 are parallel to ensure the stability of multiple transmissions.

Under the drive of the motor 31, the output rotating shaft of the motor 31 drives the transmission screw 32 to rotate through a gear, and the rotary motion of the transmission screw 32 is transmitted to the linear motion of the moving bracket 2 through the thread transmission, so that the moving bracket 2 slides along the guide rod 33.

The sliding connection between the movable bracket 2 and the guide rod 33 includes, but is not limited to, the following two ways:

(1) The guide rod 33 is a linear guide shaft, the linear guide shaft is installed on the outer frame 1, the linear guide shaft is axially limited through an E-shaped retaining ring 8, the movable support 2 is provided with a linear bearing 5 matched with the linear guide shaft, the linear bearing 5 is installed on the movable support 2 in an interference fit mode, the linear guide shaft penetrates through the linear bearing 5, and the movable support 2 can easily slide on the linear guide shaft through the linear bearing 5.

(2) The guide rod 33 is provided with a sliding groove along the length direction of the guide rod, two ends of the guide rod 33 are respectively fixed on two sides of the outer frame 1, the movable support 2 is provided with a sliding block matched with the sliding groove, the sliding block is always located in the sliding groove, and the movable support 2 linearly slides on the sliding groove by utilizing the sliding block.

In an embodiment of the present invention, the movable support 2 includes two upper movable supports 21 arranged in parallel, and two sets of driving assemblies 3 are correspondingly configured as upper driving assemblies; two sets of upper drive assembly correspond and distribute in a set of opposite side of outer frame 1, the guide bar 33 parallel arrangement that two sets of upper drive assembly correspond, the both ends of upper strata removal support 21 respectively with a guide bar 33 sliding connection to it is more steady to make upper strata removal support 21 remove, for example both ends all slide through linear bearing.

The two upper-layer movable brackets 21 can approach or move away from each other under the action of the two groups of upper-layer driving assemblies, see fig. 6, so as to form an upper-layer movable lead window, see fig. 1 for the closed state of the upper-layer movable lead window, and see fig. 3 for the completely opened state of the upper-layer movable lead window, specifically, the upper-layer movable lead window is matched with the linear guide shaft in a relatively sliding manner through a linear bearing; because the transmission screw is in threaded transmission fit with the movable support, the rotation of the transmission screw can be converted into the translational motion of the movable support, and then the opening and closing of the upper movable lead window are realized.

Similarly, the moving frame 2 further includes two lower moving frames 22 disposed in parallel, the lower moving frames 22 work on the same principle as the upper moving frames 21, only the moving direction is changed, and the angle between the moving direction of the upper moving frame 21 and the moving direction of the lower moving frame 22 is 85 ° to 90 °, preferably 90 °. Two groups of driving components 3 are correspondingly configured with the two lower-layer moving brackets 22 and are used as lower-layer driving components; the two groups of lower-layer driving assemblies are correspondingly distributed on the other pair of edges of the outer frame 1, so that the four side surfaces of the outer frame 1 are provided with corresponding driving assemblies; the guide rods 33 corresponding to the two sets of lower-layer driving assemblies are arranged in parallel, and two ends of the lower-layer moving support 22 are respectively connected with one guide rod 33 in a sliding manner.

The two lower movable supports 22 can move close to or away from each other under the action of the two groups of lower driving assemblies, see fig. 7, so as to form a lower movable lead window, and the lower movable lead window is also matched with the linear guide shaft in a relatively sliding manner through a linear bearing; because the transmission screw is in threaded transmission fit with the movable support, the rotation of the transmission screw can be converted into the translational motion of the movable support, and then the opening and closing of the movable lower-layer lead window are realized.

It should be noted that, the lower movable support is closer to the radiation source than the upper movable support, and this embodiment sets up towards the radiation source direction for inwards, and the departure is outwards towards the radiation source direction, and the lead plate on the upper movable support 21 sets up inwards, and the lead plate on the lower movable support 22 sets up outwards for when both are folded, relative lead plate almost laminates, leaks from these both gaps with the ray. The transmission screw 32 is in threaded transmission with only one moving bracket 2 on the same layer and is in sliding connection with the other moving bracket 2 so as to ensure the one-to-one action effect of the driving components.

In order to limit the moving range of the moving bracket 2, the outer frame 1 is provided with a photoelectric switch 7 at a safe limit position of the moving path of the moving bracket 2, the photoelectric switch 7 is electrically connected with the motor 31 and is configured to trigger the motor 31 to stop running, the moving bracket 2 is provided with a baffle 6 as a limit baffle, the moving bracket 2 moves to the safe limit position, and the baffle 6 covers the photoelectric switch 7, so that the photoelectric switch 7 triggers the motor 31 to stop running. It should be noted that each mobile bracket is correspondingly provided with a blocking piece, and the outer frame 1 is provided with a photoelectric switch 7 matched with the blocking piece, so as to limit the moving range of the corresponding mobile bracket and ensure safety. The movement of the movable lead window can drive the limiting blocking piece arranged on the movable support to move together, when the limiting blocking piece moves to the photoelectric switch, the photoelectric switch outputs a signal to trigger the motor to stop rotating, and the movable lead window reaches the limiting position.

In an embodiment of the present invention, the two ends of the movable bracket 2 are respectively provided with a connecting portion extending toward the ray source direction, so as to form a U-shaped structure, which can reduce the overall height of the beam limiter after installation to save space, and the driving screw 32 passes through the connecting portion and is in threaded transmission with the connecting portion.

The utility model provides an X ray beam limiter is small, light in weight, save space, and its rotary motion conversion that utilizes the screw thread transmission to remove the support is for linear motion, simplifies the inner structure of restricting greatly to make whole miniaturization and lightweight more, portable transport.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The X-ray beam limiter is characterized by comprising an outer frame (1) and a movable support (2), wherein one movable support (2) is correspondingly provided with a driving assembly (3), a lead plate (4) is arranged in the middle of the movable support (2), the lead plate (4) is used for shielding rays emitted by a ray source, the driving assembly (3) comprises a motor (31), a transmission screw (32) and a guide rod (33), the motor (31) and the guide rod (33) are arranged on the outer frame (1), an output rotating shaft of the motor (31) is in gear transmission with the transmission screw (32), the transmission screw (32) is rotatably connected with the outer frame (1), the transmission screw (32) is in thread transmission with the movable support (2), and the movable support (2) is in sliding connection with the guide rod (33);

under the drive of the motor (31), the output rotating shaft drives the transmission screw rod (32) to rotate so as to drive the movable support (2) to slide along the guide rod (33).

2. The X-ray beam limiter according to claim 1, characterized in that the moving support (2) comprises two upper moving supports (21) arranged in parallel, and the driving assemblies (3) are correspondingly configured with two groups as upper driving assemblies; two sets of upper drive components correspond and distribute in a set of opposite side of outer frame (1), guide bar (33) parallel arrangement that two sets of upper drive components correspond, the both ends of upper strata movable support (21) respectively with a guide bar (33) sliding connection.

3. The X-ray beam limiter according to claim 2, characterized in that the moving support (2) further comprises two lower moving supports (22) arranged in parallel, and the driving assemblies (3) are additionally provided with two groups correspondingly as lower driving assemblies; two sets of lower floor's drive assembly correspond and distribute in another group of outer frame (1) is to the limit, and guide bar (33) parallel arrangement that two sets of lower floor's drive assembly correspond, the both ends of lower floor's movable support (22) respectively with a guide bar (33) sliding connection.

4. The X-ray beam limiter according to claim 2, characterized in that a drive screw (32) is in threaded connection with one upper movable support (21) and is in sliding connection with the other upper movable support (21).

5. An X-ray beam limiter according to claim 3, characterized in that the direction of movement of the upper moving support (21) and the direction of movement of the lower moving support (22) are at an angle in the range of 85 ° to 90 °.

6. The X-ray beam limiter according to claim 1, characterized in that the guide rod (33) is a guide shaft, and the mobile carrier (2) is provided with a linear bearing (5) cooperating with the guide shaft.

7. An X-ray beam limiter according to claim 1, characterized in that the guide bar (33) is provided with a slide groove along its length, and the mobile carrier (2) is provided with a slide block cooperating with the slide groove.

8. The X-ray beam limiter according to claim 1, characterized in that the axis of the output shaft, the axis of the guide rod (33) and the axis of the drive screw (32) are parallel.

9. The X-ray beam limiter according to claim 1, characterized in that the outer frame (1) is provided with a photoelectric switch (7) at a safe limit position of the moving path of the moving bracket (2), the photoelectric switch (7) is electrically connected with the motor (31) and is configured to trigger the motor (31) to stop running, and the moving bracket (2) is provided with a baffle (6); the movable support (2) moves to the safety limit position, and the blocking piece (6) covers the photoelectric switch (7), so that the photoelectric switch (7) triggers the motor (31) to stop running.

10. An X-ray beam limiter according to claim 1, characterized in that the end of the moving support (2) is provided with a connection extending in the direction of the radiation source, through which connection the drive screw (32) passes and is in threaded drive with the connection.