Rotary positioning mechanism of X-ray machine

Abstract

The invention provides a rotary positioning mechanism of an X-ray machine, which is characterized in that an arc-shaped auxiliary rotating arm is coaxially and rotatably mounted on the surface of a rotating arm, and a plane rack is coaxially arranged on the surface, facing the rotating arm, of the auxiliary rotating arm; a driven gear is rotatably installed at the end of the rotating arm, a screw penetrates through a shaft hole of the driven gear in a threaded fit mode, the axial direction of the screw passes through the circle center of the rotating arm, the end, facing the center of the rotating arm, of the screw is rotatably installed in an installation frame in a matched mode, and a sliding rod in elastic telescopic connection with the rotating arm is fixed to one end of the installation frame. The other end of each mounting rack is used for mounting an X-ray emitter or an X-ray detector, and the X-ray emitter and the X-ray detector which are correspondingly mounted on the two mounting racks are opposite to each other; the auxiliary rotating arm is in transmission connection with the driving mechanism, so that the X-ray emitter and the X-ray detector synchronously get close to each other or get away from each other. The device is simple and compact in structure, the detection direction can be flexibly adjusted, and positioning of the X-ray emitter and the X-ray detector can be better achieved.

Description

Technical Field

[0001] This invention belongs to the field of X-ray inspection equipment technology, and more specifically, it is a rotary positioning mechanism for an X-ray machine. Background Technology

[0002] X-ray machines primarily utilize X-ray imaging systems to examine objects and explore their internal structure. They mainly consist of X-ray sources and X-ray detectors that are positioned opposite each other or coaxially spaced. X-rays emitted from the X-ray source illuminate the X-ray detector, displaying an X-ray image of the object positioned between the X-ray source and the detector for analysis and judgment.

[0003] Existing X-ray machines, designed for ease of transport and use, are flexible and portable, aiming to achieve a suitable relative position with the object under test. Essentially, this involves moving and installing the X-ray source and detector to an ideal location around the object, thus achieving precise positioning. While current X-ray machines utilize a C-shaped rotating arm to adjust the X-ray source and detector to an ideal detection position, facilitating the placement of the object and acquiring a complete image of the tested area, it becomes difficult to place the object in the ideal detection position when dealing with larger objects or areas requiring large localized inspection. The X-ray source and detector can easily interfere with the object, especially when circling or rotating to acquire images of a specific area. This often results in the X-ray source or detector touching the object or medical personnel, hindering the accurate detection process. Summary of the Invention

[0004] In view of the current state of the technology mentioned in the background art, and in order to overcome the corresponding defects in the prior art, the present invention specifically discloses an X-ray machine rotation positioning mechanism, which can better solve the problems mentioned in the background art.

[0005] To overcome the deficiencies of the existing technology, those skilled in the art provide the following technical solutions: An X-ray machine rotation positioning mechanism includes a support and an arc-shaped rotating arm rotatably mounted on the support. A similarly arc-shaped auxiliary rotating arm is coaxially mounted on the surface of the rotating arm, and the auxiliary rotating arm has a planar rack coaxially on the surface of the rotating arm. A driven gear is rotatably mounted at the end of the rotating arm, and a screw is threaded through the shaft hole of the driven gear. The axial direction of the screw passes through the center of the rotating arm. One end of the screw facing the center of the rotating arm is rotatably mounted in a mounting bracket and remains attached to the bracket. One end of the mounting bracket is fixed with a sliding rod that is elastically telescopically connected to the rotating arm. The sliding rod is parallel to the screw. The other end of the mounting bracket is used to mount an X-ray emitter or an X-ray detector, and the X-ray emitters and X-ray detectors mounted on the two mounting brackets are directly opposite each other. The auxiliary rotating arm is connected to a drive mechanism so that during rotation, it drives the driven gear to rotate, thereby driving the screw to move axially, causing the X-ray emitter and X-ray detector to move closer or further apart synchronously.

[0006] Furthermore, the mounting bracket includes an arc-shaped curved beam and a mounting sleeve. The sliding rod is fixed at one end of the curved beam, and the inner side of the other end is used to mount an X-ray emitter or an X-ray detector. Two positioning rings are coaxially fixed on the screw, and the two positioning rings respectively rotatably contact the two end faces of the mounting sleeve.

[0007] Furthermore, the end faces of each locating ring and mounting sleeve are connected by a planar bearing.

[0008] Furthermore, a sleeve is fixed to the outside of the rotating arm, and a pressure spring that is always under pressure is installed inside the sleeve. The pressure spring is connected to one end of a slide rod that is axially slidably inserted into the sleeve.

[0009] Furthermore, the rotating arm has a rectangular hole at its end, within which the driven gear is rotatably mounted.

[0010] Furthermore, the drive mechanism includes a second motor and a second drive gear. The second motor drives the second drive gear to rotate. The second drive gear is rotatably mounted inside the support and meshes with a second arc-shaped rack that passes through the outer side of the auxiliary rotating arm of the support.

[0011] Furthermore, the lower part of the auxiliary rotating arm is a sliding part with a T-shaped cross-section, which is slidably installed inside the rotating arm, and the second arc-shaped rack protrudes from the surface of the rotating arm.

[0012] Furthermore, a first arc-shaped rack is coaxially provided on the outer side of the rotating arm, and a first drive gear is rotatably installed inside the support, the first drive gear being connected to the first motor for transmission.

[0013] Furthermore, there are two auxiliary rotating arms, each of which is semi-circular. The two auxiliary rotating arms are hinged together by a hinge component, which can form a complete circular planar gear and can overlap each other by relative hinged rotation.

[0014] Furthermore, in the two interlocking secondary swing arms, one of the secondary swing arms has two mounting ears at its end face, forming a rectangular notch between the two mounting ears. The other secondary swing arm has a hinge ear at its end face, with a hinge post on the hinge ear. The hinge ear is located within the notch and can be freely rotated within the notch. The two ends of the hinge post are respectively rotatably installed in the mounting ears on two opposite sides of the notch, and a locking nut is threaded onto the outer end of one of the mounting ears. The locking nut axially presses the hinge post so that the two secondary swing arms cannot rotate relative to each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the present invention uses a simple transmission structure to adjust the rotation of the rotating arm and the auxiliary rotating arm to adapt to different detection orientations and different sizes of the objects to be measured. By driving the auxiliary rotating arm to rotate, the distance between the X-ray emitter and the X-ray detector can be adjusted, and during the adjustment process, the two can always remain aligned to ensure that a complete detection image is obtained.

[0016] Other functions and features of the present invention will be described in detail in the following embodiments to provide a full understanding of the concept of the present invention and to enable its practical application in production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one structure of the present invention; Figure 2 This is a partial structural cross-sectional view of the present invention; Figure 3 When two auxiliary swing arms are combined into a circular structure, a side view at the hinge point is taken. Figure 4 A partial structural diagram showing the two auxiliary rotating arms overlapping; Figure 5 for Figure 3 Top view of the structure shown; Figure 6 Exploded view of the hinge joint between the two auxiliary swing arms; Figure 7 For those with locking screw caps Figure 5 A schematic diagram of the structure shown; Figure 8 This is a diagram showing a possible combination structure between the auxiliary rotating arm and the rotary arm.

[0018] As shown in the figure, the components are: support 1, rotating arm 2, first arc rack 201, secondary rotating arm 3, second arc rack 301, driven gear 4, screw 5, mounting bracket 6, curved beam 601, mounting sleeve 602, slide rod 7, sleeve 8, pressure spring 9, first drive gear 10, second drive gear 11, positioning ring 12, mounting ear 13, hinge ear 14, hinge column 15, locking screw cap 16, limit guide block 17, X-ray detector a, and X-ray emitter b. Detailed Implementation

[0019] Based on the accompanying drawings and the following description, the technical solutions in the embodiments of the present invention can be clearly and completely described. However, it should be understood that the embodiments mentioned herein are merely one or several specific methods of the present invention, and not all implementation structures or method steps.

[0020] like Figures 1-2 As shown, one embodiment of the present invention specifically proposes a rotary positioning mechanism for an X-ray machine, including a support 1 and an arc-shaped rotating arm 2 rotatably mounted on the support 1. A similarly arc-shaped auxiliary rotating arm 3 is coaxially mounted on the surface of the rotating arm 2. The auxiliary rotating arm 3 has a planar rack coaxially with the surface of the rotating arm 2, for example, a planar gear structure machined on the end face of the auxiliary rotating arm 3. Furthermore, in this embodiment, a driven gear 4 is rotatably mounted at the end of the rotating arm 2. A screw 5 is threadedly inserted into the shaft hole of the driven gear 4. The axial direction of the screw 5 passes through the center of the rotating arm 2, meaning the axis of the screw 5 passes through the circle of the rotating arm 2. One end of the screw 5 facing the center of the rotating arm 2 is rotatably mounted in a mounting bracket 6 so that the screw 5 does not separate from the mounting bracket 6 when rotating, thus allowing it to move together with the mounting bracket 6. Specifically, one end of the mounting bracket 6 is fixed with a slide rod 7 that is elastically telescopically connected to the rotating arm 2. The slide rod 7 is arranged parallel to the screw 5. The other end of the mounting bracket 6 is used to mount the X-ray emitter b or the X-ray detector a, and the X-ray emitter b and X-ray detector a mounted on the two mounting brackets 6 are directly opposite each other. In terms of manufacturing, the auxiliary rotating arm 3 is connected to the drive mechanism so that when it rotates, it drives the driven gear 4 to rotate, thereby driving the screw 5 to move axially and pressing the slide rod 7 to move axially, so that the X-ray emitter b and X-ray detector a move closer or further apart synchronously to accommodate objects of different sizes to be inspected.

[0021] As one of the specific implementation structures, such as Figures 1-2As shown, the mounting bracket 6 includes an arc-shaped curved beam 601 and a mounting sleeve 602. A sliding rod 7 is fixed to one end of the curved beam 601, and the inner side of the other end is used to mount an X-ray emitter b or an X-ray detector a. Two positioning rings 12 are coaxially fixed on the screw 5. The two positioning rings 12 are respectively in rotatable contact with the two end faces of the mounting sleeve 602 so that the mounting bracket 6 can be moved easily when the screw 5 rotates. To reduce friction, a plane bearing (not shown in the figure) connects each positioning ring 12 and the end face of the mounting sleeve 602.

[0022] In this embodiment, in order to achieve the elastic telescopic installation of the slide bar 7, such as Figures 1-2 As shown, a sleeve 8 is fixed to the outside of the rotating arm 2. A pressure spring 9, which is always under pressure, is installed inside the sleeve 8. The pressure spring 9 is connected to one end of a sliding rod 7 that is axially slidably inserted into the sleeve 8. The reason for always being under pressure is to ensure that the mounting bracket 6 is in a relatively stable state, to avoid shaking, and to achieve the purpose of securing the mounting bracket 6. In practice, a rectangular hole can be provided near the end of the rotating arm 2, and a driven gear 4 can be rotatably installed in the rectangular hole.

[0023] As a specific implementation structure, such as Figure 1 This drive mechanism includes a second motor and a second drive gear 11. The second motor drives the second drive gear 11 to rotate. The second drive gear 11 is rotatably mounted inside the support 1 and meshes with a second arc-shaped rack 301 that passes through the outer side of the auxiliary rotating arm 3 of the support 1. Additionally, as... Figure 8 The lower part of the auxiliary rotating arm 3 is a sliding part with a T-shaped cross section. The sliding part is slidably installed inside the rotating arm 2, and the second arc-shaped rack 301 is exposed on the surface of the rotating arm 2 so as to mesh with the second drive gear 11 for transmission.

[0024] For the above structural design, please refer to... Figures 1-2 As shown, a first arc-shaped rack 201 is coaxially arranged on the outer side of the rotating arm 2, and a first drive gear 10 is rotatably mounted inside the support 1. The first drive gear 10 is connected to a first motor to drive the rotating arm 2 to rotate. Specifically, there are two auxiliary rotating arms 3, such as... Figures 1-2 Each secondary rotating arm 3 is semi-circular, and two secondary rotating arms 3 are hinged together by a hinge component to form a complete circular planar gear. At this time, the local structure is as follows: Figure 3 , Figure 5 , Figure 7 As shown; moreover, the two rotating arms 3 can be hinged and rotate relative to each other and overlap, as shown. Figure 4 As shown. Figure 8 Specifically, this can be achieved by fixing several limiting guide blocks 17 to the end face of the rotating arm 2, for example, by installing three limiting guide blocks 17. The structure of these limiting guide blocks 17 is as follows: Figure 8As shown, it can be L-shaped, with several limit guide blocks 17 spaced apart. The top surface of the limit guide block 17 is flush with the top surface of the auxiliary rotating arm 3, so that the two auxiliary rotating arms 3 can be rotated to the desired position when necessary. Figure 4 The overlapping positions shown prevent the auxiliary rotating arm 3 from interfering with the placement of the object under test. For ease of assembly and disassembly, these limit guide blocks 17 can also be bolted to the rotating arm 2 so that some limit guide blocks 17 can be removed when needed.

[0025] In more detail, such as Figures 5-7 As shown, in the two interlocking auxiliary rotating arms 3, one auxiliary rotating arm 3 has two mounting ears 13 at its end face, forming a rectangular notch between the two mounting ears 13. The other auxiliary rotating arm 3 has a hinge ear 14 at its end face, which is also rectangular in shape. A hinge post 15 is provided on the hinge ear 14. The hinge ear 14 is located in the notch and can be installed freely within the notch. The two ends of the hinge post 15 are respectively rotatably installed in the mounting ears 13 on the two opposite sides of the notch. A locking nut 16 is threadedly fitted onto the outer end of one of the mounting ears 13. The locking nut 16 axially presses the hinge post 15 so that the two auxiliary rotating arms 3 cannot rotate relative to each other, so as to better drive the screw 5 to rotate.

[0026] In use, the C-shaped notch can be aligned with the object to be tested by rotating the rotating arm 2, so as to better place the object to be tested. When the object to be tested is too large, the auxiliary rotating arm 3 can be rotated to increase the distance between the X-ray emitter b or the X-ray detector a, so that the object to be tested can be placed. When adjusting to the appropriate distance, if the two auxiliary rotating arms 3 that are not connected in a ring will interfere with the target to be tested or interfere with the operation, one of the auxiliary rotating arms 3 can be flipped onto the other auxiliary rotating arm 3 for overlapping placement to avoid the above-mentioned influence.

[0027] This invention is not limited to the field covered by this embodiment. Some well-known structures or principles have not been further described. However, those skilled in the art can theoretically know all the well-known technologies in this field prior to the application date or priority date, and can fully master all the prior art in this field. They also have the means and ability to apply these prior art in practical design. Under the technical guidance provided in this application, those skilled in the art can more comprehensively improve and implement this invention by combining their own capabilities. Furthermore, it should be noted that although the text and graphics of the above embodiments have shown specific implementation scenarios of the invention, those skilled in the art can make various obvious extensions and expansions to these embodiments without departing from the design concept of the invention, forming different embodiments. However, this does not affect the fact that the scope of protection of the invention is covered and embodied by the technical features of this claim and equivalent technical features.

Claims

1. A rotary positioning mechanism for an X-ray machine, comprising a support (1) and a circular arc-shaped rotating arm (2) rotatably mounted on the support (1), characterized in that, The rotating arm (2) is coaxially mounted with an arc-shaped auxiliary rotating arm (3) on its surface. The auxiliary rotating arm (3) has a planar rack coaxially with the surface of the rotating arm (2). A driven gear (4) is rotatably mounted at the end of the rotating arm (2). A screw (5) is threaded through the shaft hole of the driven gear (4). The axial direction of the screw (5) passes through the center of the rotating arm (2). One end of the screw (5) is rotatably mounted in a mounting bracket (6) and is never separated from the mounting bracket (6). One end of the mounting bracket (6) is fixed with a slide rod (7) that is elastically telescopically connected to the rotating arm (2). The slide rod (7) is parallel to the screw (5). The other end of the mounting bracket (6) is used to mount an X-ray emitter (b) or an X-ray detector (a). The X-ray emitter (b) and the X-ray detector (a) mounted on the two mounting brackets (6) are facing each other. The auxiliary rotating arm (3) is connected to the drive mechanism so that when it rotates, it drives the driven gear (4) to rotate, thereby driving the screw (5) to move axially, so that the X-ray emitter (b) and the X-ray detector (a) move closer or further away from each other synchronously.

2. The X-ray machine rotation positioning mechanism according to claim 1, characterized in that, The mounting bracket (6) includes an arc-shaped curved beam (601) and a mounting sleeve (602). The curved beam (601) has the slide rod (7) fixed at one end, and the inner side of the other end is used to install an X-ray emitter (b) or an X-ray detector (a). Two positioning rings (12) are coaxially fixed on the screw (5), and the two positioning rings (12) are respectively in rotational contact with the two end faces of the mounting sleeve (602).

3. The X-ray machine rotation positioning mechanism according to claim 2, characterized in that, Each locating ring (12) and the end face of the mounting sleeve (602) are connected by a planar bearing.

4. The X-ray machine rotation positioning mechanism according to claim 1, characterized in that, A sleeve (8) is fixed to the outside of the rotating arm (2), and a pressure spring (9) that is always under pressure is installed inside the sleeve (8). The pressure spring (9) is connected to one end of a slide rod (7) that is axially slidably inserted into the sleeve (8).

5. The X-ray machine rotation positioning mechanism according to claim 1, characterized in that, The rotating arm (2) has a rectangular hole at its end, and the driven gear (4) is rotatably mounted in the rectangular hole.

6. The X-ray machine rotation positioning mechanism according to claim 1, characterized in that, The drive mechanism includes a second motor and a second drive gear (11). The second motor drives the second drive gear (11) to rotate. The second drive gear (11) is rotatably installed in the support (1) and meshes with the second arc-shaped rack (301) that passes through the outer side of the auxiliary rotating arm (3) of the support (1).

7. The X-ray machine rotation positioning mechanism according to claim 6, characterized in that, The lower part of the auxiliary rotating arm (3) is a sliding part with a T-shaped cross section. The sliding part is slidably installed inside the rotating arm (2), and the second arc-shaped rack (301) protrudes from the surface of the rotating arm (2).

8. The X-ray machine rotation positioning mechanism according to claim 1, characterized in that, The outer side of the rotating arm (2) is provided with a first arc-shaped rack (201) and the support (1) is rotatably installed with a first drive gear (10) and the first drive gear (10) is connected to the first motor for transmission.

9. The X-ray machine rotation positioning mechanism according to claim 1, characterized in that, The auxiliary rotating arm (3) is provided in two parts. Each auxiliary rotating arm (3) is semi-circular. The two auxiliary rotating arms (3) are hinged together by a hinge component to form a complete circular planar gear. The two auxiliary rotating arms (3) can rotate relative to each other and overlap.

10. The X-ray machine rotation positioning mechanism according to claim 9, characterized in that, In the two interlocking secondary rotating arms (3), one of the secondary rotating arms (3) has two mounting ears (13) at its end face, forming a rectangular notch between the two mounting ears (13). The other secondary rotating arm (3) has a hinge ear (14) at its end face, and a hinge pin (15) is provided on the hinge ear (14). The hinge ear (14) is located in the notch and can be freely rotated in the notch. The two ends of the hinge pin (15) are respectively rotatably installed in the mounting ears (13) on the two opposite sides of the notch. A locking screw cap (16) is threadedly fitted on the outer end of one of the mounting ears (13). The locking screw cap (16) axially presses the hinge pin (15) so that the two secondary rotating arms (3) cannot rotate relative to each other.

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