Suspension mechanism for X-ray imaging system and X-ray imaging system

Abstract

A suspension mechanism for an X-ray imaging system and an X-ray imaging system are provided. The suspension mechanism includes a main frame, a telescopic cylinder, and a slewing bearing assembled together. The telescopic cylinder includes multiple nested sleeves, and the telescopic cylinder is capable of telescoping relative to the main frame. The slewing bearing includes an inner ring and an outer ring capable of relative rotation. One of the inner and outer rings is detachably connected to the main frame, and the other of the inner and outer rings is detachably connected to the outermost sleeve among the multiple sleeves, allowing the telescopic cylinder to rotate relative to the main frame via the slewing bearing. Thus, this suspension mechanism achieves relative rotation between the telescopic cylinder and the main frame with a simple structure and low cost, and also exhibits good operational stability and high rotational accuracy.

Description

Technical Field

[0001] This application relates to the structure of an imaging device, and more specifically to a suspension mechanism for an X-ray imaging system and an X-ray imaging system including the telescopic cylinder. Background Technology

[0002] In an X-ray imaging system, X-rays from an X-ray generator are directed toward the object being scanned to achieve imaging; this object is typically a patient in medical diagnostic applications.

[0003] Figure 26 The structure of an X-ray imaging system is shown. For example... Figure 26 As shown, the X-ray imaging system includes a suspension mechanism (including a main frame 101, a telescopic cylinder 201, and an angle adjustment mechanism 301), an X-ray generating mechanism 401, a column assembly 501, and a testing bed 601. The suspension mechanism can be installed on the roof of a building. The suspension mechanism can include the assembled main frame 101, telescopic cylinder 201, and angle adjustment mechanism 301, enabling the suspension mechanism to move within a predetermined range in multiple spatial degrees of freedom. This suspension mechanism can be used to hold the X-ray generating mechanism 401 and adjust its position and orientation. The X-ray generating mechanism 401 can include an X-ray tube generator and an X-ray beam limiter. The X-ray tube generator generates X-rays, and the X-ray beam limiter confines the X-rays generated by the X-ray tube generator within a predetermined range.

[0004] Furthermore, the column assembly 501 or the examination bed 601 is used depending on the area of ​​the object to be imaged and the state of the object itself, wherein the object can stand in front of the column assembly 501 or lie flat on the examination bed 601. After the object is positioned, X-rays generated by an X-ray tube generator and limited by an X-ray beam limiter pass through the predetermined area of ​​the object. Then, for example, an X-ray detector disposed in the column assembly 501 and the examination bed 601 detects the X-rays passing through the object. This X-ray detector generates an output signal based on the radiation intensity of each discrete region of the impact detector, and processes the output signal to generate an image that can be displayed for inspection. This image can be displayed on the display device of the X-ray imaging system. Thus, by utilizing the different penetrating power of X-rays on different materials, and by detecting and processing the X-rays passing through the object, an image showing the internal structure of the object is ultimately obtained.

[0005] In order to image the scanned object at the column assembly 501 or the examination bed 601 using the aforementioned X-ray imaging system, as described above, the suspension mechanism needs to move the X-ray generating mechanism 401 to the desired position and maintain the desired posture. In existing X-ray imaging systems, the structure of the suspension mechanism used to realize the rotation of the angle adjustment mechanism 301 is located at the bottom end of the telescopic cylinder 201; however, this rotating connection structure is complex and costly. Utility Model Content

[0006] In view of the problems of the prior art, one object of this application is to provide a suspension mechanism for an X-ray imaging system. The suspension mechanism uses a slewing bearing as a rotating component, and the telescopic cylinder rotates relative to the main frame to realize the rotation of the angle support mechanism. The new design realizes the rotation function in a relatively simple and low-cost structure, and has good working stability and high rotation accuracy.

[0007] Another object of this application is to provide an X-ray imaging system including the above-described suspension mechanism.

[0008] To achieve the above objectives, the embodiments of this application may adopt the following technical solutions.

[0009] Embodiments of this application provide a suspension mechanism for an X-ray imaging system, comprising:

[0010] The main frame is designed to be mounted on a supporting surface and to move relative to the supporting surface.

[0011] A telescopic cylinder comprising a plurality of nested sleeves, the telescopic cylinder being capable of telescoping relative to the main frame; and

[0012] A slewing bearing includes an inner ring and an outer ring that are rotatable relative to each other. One of the inner ring and the outer ring is detachably connected to the main frame, and the other of the inner ring and the outer ring is detachably connected to the outermost sleeve of a plurality of sleeves, such that the telescopic cylinder can rotate relative to the main frame via the slewing bearing.

[0013] In some non-limiting embodiments, the system further includes a plurality of first threaded connectors, one of the inner ring and the outer ring being detachably connected to the main frame via the first threaded connectors; and / or includes a plurality of second threaded connectors, the other of the inner ring and the outer ring being detachably connected to the outermost sleeve of the plurality of sleeves.

[0014] In some non-limiting embodiments, the inner ring is detachably connected to the main frame, and the outer ring is detachably connected to the outermost sleeve of the plurality of sleeves.

[0015] In some non-limiting embodiments, a drive module mounted on the main frame is also included, the drive module comprising:

[0016] A bracket, which is mounted on the main frame;

[0017] The motor is mounted on the bracket;

[0018] A transmission assembly, mounted on the bracket and configured to be drive-coupled with the motor, the transmission assembly including an output wheel that outputs torque from the motor to the other of the inner and outer rings;

[0019] A brake, mounted on the bracket and configured to brake or release the transmission assembly; and

[0020] An encoder, which is mounted on the bracket and configured to detect the rotation angle of the output wheel.

[0021] In some non-limiting embodiments, the output wheel is a gear, the other of the inner and outer rings has a plurality of teeth, and the output wheel is in a meshing state with the other of the inner and outer rings; or

[0022] The output wheel is a pulley, the drive module also includes a transmission belt, and the output wheel and the other of the inner ring and the outer ring are in a belt drive state via the transmission belt.

[0023] In some non-limiting embodiments, the drive module includes an eccentric pin and an adjustment slot formed in the bracket.

[0024] The bracket is mounted on the main frame in a manner that allows it to swing relative to the main frame. The eccentric pin passes through the adjustment groove and is mounted on the main frame, such that the eccentric pin and the adjustment groove cooperate to adjust the swing angle of the bracket relative to the main frame.

[0025] In some non-limiting embodiments, the eccentric pin includes an insert portion and an eccentric head fixed to each other, the insert portion being inserted into the main frame and rotatable about its central axis, and the eccentric head being positioned in the adjustment groove and configured as a cam.

[0026] In some non-limiting embodiments, the bracket includes a support plate having the adjustment groove, the support plate also having a plurality of mounting holes spaced apart from the adjustment groove.

[0027] The drive module includes multiple mounting components, which pass through corresponding mounting holes to mount the support plate onto the main frame. The multiple mounting holes include a circular hole, a first elongated hole, and a second elongated hole. The length directions of the first elongated hole and the second elongated hole are not parallel, so that the support plate can swing around the mounting component inserted into the circular hole during the adjustment process of the eccentric pin and the adjusting groove.

[0028] In some non-limiting embodiments, the output wheel, the brake, and the encoder are arranged side-by-side along the axial direction of the output wheel, and

[0029] The brake and the encoder are located on the same side of the output wheel in the axial direction, or the brake and the encoder are located on opposite sides of the output wheel in the axial direction.

[0030] In some non-limiting embodiments, the motor is driven to the output wheel.

[0031] In some non-limiting embodiments, a limiting mechanism is also included, which includes a limiting disk and a limiting component.

[0032] The limiting disc is fixed to the other of the inner ring and the outer ring, and

[0033] The limiting component can engage with different parts of the limiting plate to limit the limiting plate to different positions.

[0034] In some non-limiting embodiments, the limiting assembly includes a rocker arm, a limiting wheel, and a tension spring, with one end of the rocker arm rotatably connected to the main frame and the other end of the rocker arm connected to the main frame via the tension spring.

[0035] The limiting disc has multiple notches, and the limiting wheel is disposed on the rocker arm and matches the shape of the notches, so that the limiting wheel presses against the limiting disc under the spring force of the tension spring, thereby allowing the limiting wheel to engage with one of the multiple notches during the rotation of the limiting disc, so as to limit the other of the inner ring and the outer ring to the corresponding position.

[0036] In some non-limiting embodiments, the limiting assembly includes a base and a spring plunger, the base being fixed to the main frame and the spring plunger being mounted on the base.

[0037] The limiting disc has multiple notches or grooves. The spring plunger includes a plunger and a compression spring. The plunger is shaped to match the notches or grooves, so that the plunger presses against the limiting disc under the spring force of the compression spring. Thus, during the rotation of the limiting disc, the plunger can selectively engage with one of the multiple notches or grooves to limit the other of the inner ring and the outer ring to the corresponding position.

[0038] In some non-limiting embodiments, the limiting assembly includes a base, an electromagnet, and support rollers.

[0039] The base is fixed to the main frame, and the electromagnet and the support roller are mounted on the base. The electromagnet and the support roller together form a component that enables the limiting disc to brake and release the brake.

[0040] The embodiments of this application also provide an X-ray imaging system, including the suspension mechanism for the X-ray imaging system described in any of the above technical solutions.

[0041] In some non-limiting embodiments, an angle adjustment mechanism and an X-ray generating mechanism are also included.

[0042] The X-ray imaging system is fixed to the angle adjustment mechanism by the innermost sleeve of the telescopic sleeve of the suspension mechanism, and

[0043] The X-ray generating mechanism is mounted on the angle adjustment mechanism. Attached Figure Description

[0044] Figure 1 and Figure 2 This is a side view schematic diagram showing a partial structure of an X-ray imaging system according to a first embodiment of this application, wherein the telescopic cylinder is in a retracted state.

[0045] Figure 3 It shows Figure 1 A side view of a portion of the structure of the X-ray imaging system, showing the telescopic cylinder in an extended state.

[0046] Figure 4 and Figure 5 It shows Figure 1 A three-dimensional schematic diagram of a portion of the structure of an X-ray imaging system, showing part of the suspension mechanism.

[0047] Figure 6 It shows Figure 1 A three-dimensional schematic diagram of the main frame of the X-ray imaging system.

[0048] Figure 7 It shows Figure 1A three-dimensional schematic diagram of part of the structure of the X-ray imaging system, which mainly shows the connection structure of the main frame and the slewing bearing.

[0049] Figure 8 It shows Figure 1 The diagram shows a side view of a portion of the structure of the X-ray imaging system, primarily illustrating the connection between the main frame and the slewing bearing, with some parts of the structure shown in perspective.

[0050] Figure 9 It shows Figure 1 A three-dimensional schematic diagram of the slewing bearing of the X-ray imaging system.

[0051] Figure 10 It shows Figure 1 A three-dimensional schematic diagram of the drive module of the X-ray imaging system.

[0052] Figure 11 It shows Figure 10 A side view of the driver module.

[0053] Figure 12 It shows Figure 10 A bottom view of the drive module.

[0054] Figure 13 It shows Figure 10 A bottom view of the support plate of the drive module in the diagram.

[0055] Figure 14 It shows Figure 1 The diagram shows a partial top view of the X-ray imaging system, which mainly illustrates the construction of the limiting mechanism that can operate in the mode of manually rotating the telescopic cylinder.

[0056] Figure 15 It shows Figure 14 A bottom view of the limit plate of the limit mechanism in the diagram.

[0057] Figure 16 It shows Figure 14 A three-dimensional schematic diagram of the limiting component of the limiting mechanism in the diagram.

[0058] Figure 17 It shows Figure 14 An enlarged schematic diagram of a portion of the limiting mechanism shows the engagement state between the notch of the limiting disc and the limiting wheel.

[0059] Figure 18 It shows that it can replace Figure 14 A bottom view of the first variant of the limiting mechanism in the diagram.

[0060] Figure 19 It shows Figure 18 A side view of the limiting mechanism of the first variant example.

[0061] Figure 20 It shows that it can replace Figure 14 A schematic diagram of the limiting mechanism in the second variant of the limiting mechanism.

[0062] Figure 21 It shows Figure 20 A side view of the limiting mechanism in the second variant example.

[0063] Figure 22 It shows Figure 20 A top view of the limiting component of the limiting mechanism in the second variant example.

[0064] Figure 23 This is a perspective view showing a partial structure of an X-ray imaging system according to a second embodiment of the present application, wherein a partial structure of the suspension mechanism is shown.

[0065] Figure 24 It shows Figure 23 A three-dimensional schematic diagram of the drive module of the X-ray imaging system.

[0066] Figure 25 It shows Figure 24 A side view of the driver module.

[0067] Figure 26 This is a three-dimensional schematic diagram of an existing X-ray imaging system. Detailed Implementation

[0068] Embodiments of this application are described below with reference to the accompanying drawings. For ease of understanding, the elements shown in the drawings may include elements expressed differently from actual dimensions and scales. Furthermore, in the detailed description of the embodiments, for the sake of brevity, this specification does not describe all features of the embodiments in detail.

[0069] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning understood by those skilled in the art to which this application pertains. The terms "first," "second," and similar terms used in the description and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" indicate that the components or objects preceding "comprising" encompass the components or objects listed following "comprising" and their equivalents, and do not exclude other components or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

[0070] In this application, "approximately" means that the conditions described herein can be considered to be met within a reasonable margin of error recognized by a person skilled in the art, and the following description uses this expression to convey a similar meaning.

[0071] In this application, "transmission connection" refers to the connection of two components that can transmit torque, including direct connection and indirect connection between the two components.

[0072] In this application, unless otherwise stated, "front-back direction," "left-right direction," and "up-down direction" refer to the front-back direction, left-right direction, and up-down direction of the X-ray imaging system according to this application, respectively. In the initial state of the X-ray imaging system according to this application, the X-ray generating mechanism is located in front of the telescopic cylinder, and correspondingly, the telescopic cylinder is located behind the X-ray generating mechanism; left and right refer to the left and right sides when observing forward in the initial state of the X-ray imaging system according to this application; upper and lower generally refer to the upper and lower sides in the vertical direction.

[0073] In this application, unless otherwise stated, "axial" means the axial direction of the output wheel of the drive module of the X-ray imaging system.

[0074] The structure of an X-ray imaging system according to a first embodiment of this application will be described below with reference to the accompanying drawings, and in particular, the structure of the suspension mechanism for the X-ray imaging system will be described.

[0075] like Figures 1 to 5 As shown, the X-ray imaging system according to the first embodiment of this application may include a suspension mechanism and an X-ray generating mechanism 5.

[0076] The suspension mechanism may include a main frame 1, a telescopic cylinder 2, a slewing bearing 3, and an angle adjustment mechanism 4, all assembled together. The main frame 1 holds and supports the telescopic cylinder 2 and the angle adjustment mechanism 4. The main frame 1 may include a track mechanism consisting of multiple tracks, which guide the main frame 1 to translate within a predetermined plane, thereby allowing the main frame 1 to be positioned at any location within a predetermined range within the predetermined plane. The telescopic cylinder 2 may have multiple sleeves 21 (see...). Figures 1 to 3 These sleeves 21 are nested or fitted together to form a structure capable of controlled telescopic extension. One end of the telescopic sleeve 2 is mounted to the main frame 1 and the other end is connected to the angle adjustment mechanism 4 (see [reference]). Figures 1 to 3 The telescopic cylinder 2 is mounted on the main frame 1 via a slewing bearing 3, thereby allowing the telescopic cylinder 2 to rotate relative to the main frame 1. In this way, the telescopic cylinder 2 can rotate not only in the retracted state (see...) Figure 2 ) and extended state (see Figure 3 The mechanism can switch between these directions, thereby causing the angle adjustment mechanism 4 to reciprocate in, for example, the vertical direction D3, and also to rotate. Thus, the suspension mechanism can move within a predetermined range in multiple spatial degrees of freedom.

[0077] The X-ray generating mechanism 5 may include an X-ray generator and an X-ray beam limiter. The X-ray generator may include an X-ray tube assembly capable of generating X-rays. The X-ray beam limiter confines the X-rays generated by the X-ray generator within a predetermined range, thereby concentrating the X-rays on a predetermined part of the scanned object. This application does not limit the specific construction of the X-ray generator; various existing or future technologies can be used. The X-ray generator and the X-ray beam limiter can be mounted via a suspension mechanism to, for example, the ceiling (support surface) of a building. The suspension mechanism can hold the X-ray generator and the X-ray beam limiter and adjust their position and orientation. Specifically, the X-ray generating mechanism 5 is connected to an angle adjustment mechanism 4. Furthermore, the angle adjustment mechanism 4 is mainly used to adjust the rotation angle of the X-ray generating mechanism 5 about an axis extending horizontally; the telescopic cylinder 2 is mainly used to adjust the rotation angle of the X-ray generating mechanism 5 along an axis extending vertically and its reciprocating motion along that axis; and the main frame 1 is mainly used to adjust the reciprocating motion of the X-ray generating mechanism 5 within a predetermined range in the horizontal plane. In this way, the X-ray generating mechanism 5 can be adjusted and positioned in the predetermined location.

[0078] Therefore, once the scanning subject, such as a patient, is in a standing or lying position, the scanning subject can remain stationary. Under the control of the control unit, the X-ray generator and X-ray beam limiter of the X-ray generating mechanism 5 can move to the desired position, thereby enabling the X-ray imaging system to perform the desired three-dimensional imaging of the scanning subject.

[0079] The specific construction of the suspension mechanism for the X-ray imaging system according to the first embodiment of this application will be described in detail below with reference to the accompanying drawings.

[0080] like Figures 1 to 5 As shown, the suspension mechanism for the X-ray imaging system according to the first embodiment includes a main frame 1, a telescopic cylinder 2, a slewing bearing (also called a turntable bearing) 3, a plurality of first threaded connectors 61, a plurality of second threaded connectors 62, a drive module 7, and a limiting mechanism 8 assembled together.

[0081] In this embodiment, the main frame 1 can be integrally formed from a rigid material such as metal to have sufficient structural strength. Figures 4 to 6 As shown, the main frame 1 includes a rectangular base and sidewalls extending upwards from the four edges of the rectangular base, giving the main frame 1 sufficient structural stability. Connecting protrusions are also formed at different locations on the sidewalls, each protrusion having a connecting hole, such as a threaded hole, allowing bolts inserted into these connecting holes to mount the main frame 1 onto a track, and via the track to the ceiling of the building (an example of a supporting surface). Thus, the main frame 1 can move relative to the supporting surface via the track.

[0082] The bottom of the main frame 1 is divided into different areas, which correspond to the installation of different functional components or modules, such as balancers and telescopic cylinder lifting mechanisms. Figure 6 As shown, a frame through hole 1h2 extending in the vertical direction D3 is formed on the rear side of the bottom, and a plurality of frame mounting holes 1h1 are formed on the outer periphery of the frame through hole 1h2 at the bottom. These frame mounting holes 1h1 are evenly distributed at equal intervals along the circumference of the frame through hole 1h2, and these frame mounting holes 1h1 correspond to the inner ring mounting holes 31h of the inner ring 31 of the slewing bearing 3.

[0083] It is understood that the main frame 1 has sufficient structural strength and stability, and can support the functional components or modules as described above. Therefore, the materials and structure of the main frame 1 are not limited to the specific examples described above, but can be adjusted as needed.

[0084] In this embodiment, as Figures 1 to 5As shown, the telescopic cylinder 2 is mounted on the main frame 1 and extends linearly downward from the main frame 1 along the vertical direction D3. The telescopic cylinder 2 includes multiple (five in this embodiment) sleeves 21 assembled together. The sleeves 21 can be made of a hard material such as metal, and the sleeves 21 are configured to have a structure formed integrally, for example, by a casting process. In order to allow multiple sleeves 21 to be assembled together while saving space, the multiple sleeves 21 have a similar structure and shape. Specifically, on the one hand, see Figure 14 Although the cross-sectional dimensions of the multiple sleeves 21 are different, the multiple sleeves 21 have approximately the same cross-sectional shape. On the other hand, as... Figure 2 and Figure 3 As shown, the multiple sleeves 21 have approximately the same length. Furthermore, each sleeve 21 surrounds and defines a cavity with both ends open to the outside, such that the sleeve 21 is formed as a hollow cylindrical structure.

[0085] When all sleeves 21 form a hollow cylindrical structure, such as Figures 2 to 3 As shown, multiple sleeves 21 are nested together. That is, the innermost sleeve 21 is housed within the cavity of the adjacent sleeve 21 located on its outer side. The outermost sleeve 21 of the telescopic cylinder 2 can be mounted on the main frame 1 via a slewing bearing 3, allowing it to rotate about its central axis. Thus, the entire telescopic cylinder 2 can rotate relative to the main frame 1 about the central axis of the slewing bearing 3. The innermost sleeve 21 of the telescopic cylinder 2 is connected to the X-ray generating mechanism 5 via an angle adjustment mechanism 4. Thus, the telescopic movement of the telescopic cylinder 2 allows the angle adjustment mechanism 4 to adjust the position of the X-ray generating mechanism 5 in the vertical direction D3. Alternatively, the innermost sleeve 21 of the telescopic cylinder 2 can be non-rotatably connected to the angle adjustment mechanism 4, allowing the X-ray generating mechanism 5 to be positioned at the front of the telescopic cylinder 2. In an optional configuration, the innermost sleeve 21 of the telescopic cylinder 2 can be rotatably connected to the angle adjustment mechanism 4, allowing for more flexible adjustment of the position of the X-ray generating mechanism 5.

[0086] After all the sleeves 21 are assembled in a nested manner, the central axes of all the sleeves 21 are parallel to each other. See also Figure 14 The central axis of each inner sleeve 21 is positioned forward relative to the central axis of the outer sleeve 21 adjacent to that inner sleeve 21 (i.e., Figure 14The position is on the right side of the middle sleeve 21. Thus, in each pair of inner and outer sleeves 21, the central axis of the inner sleeve 21 is positioned forward relative to the central axis of the outer sleeve 21, making the central axis of the innermost sleeve 21 positioned significantly forward relative to the central axis of the outermost sleeve 21. This shortens the distance between the central axis of the innermost sleeve 21 and the front end of the X-ray generating mechanism 5, saving space. Furthermore, since the structure connecting the X-ray generating mechanism 5 to the telescopic cylinder 2 via the angle adjustment mechanism 4 effectively forms a cantilever beam, the load torque generated by the angle adjustment mechanism 4 and the X-ray generating mechanism 5 is relatively smaller. This improves the structural stability of the cantilever beam structure formed by the telescopic cylinder 2, the angle adjustment mechanism 4, and the X-ray generating mechanism 5, and enhances the overall operational stability of the X-ray imaging system.

[0087] To enable the telescopic cylinder 2 to extend and retract along the vertical direction D3, each inner sleeve 21 of the plurality of sleeves 21 is configured to be slidably connected to its adjacent outer sleeve 21, so that each inner sleeve 21 can move to an extended position and a retracted position relative to its corresponding outer sleeve 21. When all the inner sleeves 21 have moved to the extended position relative to their corresponding outer sleeves 21, such as Figure 3 As shown, the entire telescopic cylinder 2 is in the extended state, and the length of the entire telescopic cylinder 2 is slightly less than or approximately equal to the sum of the axial lengths of each sleeve 21. When all the inner sleeves 21 have moved to the retracted position relative to their corresponding outer sleeves 21, as... Figure 1 and Figure 2 As shown, all the sleeves 21 are arranged overlapping in the vertical direction D3, and the entire telescopic cylinder 2 is in a retracted state, with the length of the entire telescopic cylinder 2 being approximately equal to the length of the outermost sleeve 21. It is understood that the telescopic cylinder 2 of this application can move and remain in an intermediate state between the extended and retracted states, and is not necessarily required to be in either of these states. To achieve the extension and retraction of the telescopic cylinder 2, a drive motor and a flexible transmission component, such as a transmission chain or transmission rope, driven by the drive motor can be provided on the main frame 1. The flexible transmission component is connected to all the sleeves 21 respectively.

[0088] In this embodiment, in order for the telescopic cylinder 2 to rotate relative to the main frame 1, as follows: Figure 3 , Figure 5 , Figure 7 and Figure 8As shown, the telescopic cylinder 2 is mounted on the main frame 1 via a slewing bearing 3. Specifically, the slewing bearing 3 includes an inner ring 31 and an outer ring 32 capable of relative rotation, and a plurality of rolling elements located between the inner ring 31 and the outer ring 32. The inner ring 31 and the outer ring 32 are coaxially fitted together, and a raceway is defined between the inner ring 31 and the outer ring 32 for mounting and rotating the plurality of rolling elements. The slewing bearing 3 not only has a compact structure and can withstand large combined loads (it can simultaneously withstand large axial loads, radial loads, and overturning moments), but also has reliable durability and alignment accuracy.

[0089] Furthermore, in order to allow the inner ring 31 to be detachably connected to the main frame 1, such as... Figures 7 to 9 As shown, the inner ring 31 has multiple inner ring mounting holes 31h extending in the vertical direction D3. These inner ring mounting holes 31h can be arranged in pairs with the frame mounting holes 1h1 of the main frame 1. Thus, by inserting the first threaded connector 61 into the paired inner ring mounting holes 31h and frame mounting holes 1h1, a detachable threaded connection is achieved between the inner ring 31 and the main frame 1. To allow the outer ring 32 to be detachably connected to the outermost sleeve 21 of the telescopic cylinder 2, as shown... Figure 5 and Figure 9 As shown, the outer ring 32 has multiple outer ring mounting holes 32h extending in the vertical direction D3. Multiple mounting brackets can be attached to the outermost sleeve 21 of the telescopic cylinder 2, each bracket having a connecting hole arranged in pairs with the outer ring mounting holes 32h. Thus, by inserting a second threaded connector 62 into the paired outer ring mounting holes 32h and the connecting holes of the mounting brackets, a detachable threaded connection is achieved between the outer ring 32 and the telescopic cylinder 2. It is understood that in other alternative solutions, the inner ring 31 can be detachably mounted to the main frame 1 via other mechanical connection methods such as snap-fit, and the outer ring 32 can be detachably mounted to the outermost sleeve 21 of the telescopic cylinder 2 via other mechanical connection methods such as snap-fit. In this way, the slewing bearing 3 can not only be reliably and stably mounted to the main frame 1 and the telescopic cylinder 2, but also facilitates disassembly and assembly, which is beneficial for later maintenance and replacement.

[0090] Furthermore, in order to enable the drive module 7 to drive the entire telescopic cylinder 2 to rotate via the outer ring 32, multiple gear teeth are formed on the outer circumference of the outer ring 32. That is, the outer ring 32 is constructed as a gear, and the outer ring 32 is in an external meshing state with the output wheel 731 of the drive module 7 to form an external gear pair.

[0091] In this embodiment, as Figure 4 and Figure 5 As shown, the drive module 7 adopts a modular construction and can be disassembled and installed as a whole on the main frame 1. Specifically, further refer to... Figures 10 to 12The drive module 7 includes a bracket 71, a motor 72, a transmission assembly 73, a brake 74, an encoder 75, a mounting piece 76, and an eccentric pin 77 assembled together. These components are integrated to facilitate installation, disassembly, and transportation.

[0092] like Figures 10 to 12 As shown, the bracket 71 has a layered structure in the vertical direction D3 and has structural features for mounting the motor 72, transmission assembly 73, brake 74, and encoder 75. These structural features include, but are not limited to, plates, holes, slots, etc. The bracket 71 includes a support plate 711 mounted to the main frame 1 via a mounting member 76, such as... Figure 13 As shown, the support plate 711 is located above the other structures of the bracket 71 in the vertical direction D3 and is formed in a flat plate shape. The support plate 711 has three mounting holes 711h and one adjustment groove 711c, which are positioned at the four corners of the support plate 711, thereby spacing the mounting holes 711h and the adjustment groove 711c by a sufficient distance. Both the mounting holes 711h and the adjustment groove 711c are formed as through holes that penetrate the support plate 711 along the vertical direction D3.

[0093] like Figure 13 As shown, of the three mounting holes 711h, one mounting hole 711h is formed as a circular hole, such that the cross-sectional shape of the mounting hole 711h in the cross-section taken along the front-back direction D1 and the left-right direction D2 is circular; one mounting hole 711h is formed as a first elongated oval hole, such that the cross-sectional shape of the mounting hole 711h is elongated oval, and the length direction of the elongated oval is along the front-back direction D1; and one mounting hole 711h is formed as a second elongated oval hole, such that the cross-sectional shape of the mounting hole 711h is elongated oval, and the length direction of the elongated oval is along the left-right direction D2. Therefore, after the mounting member 76 is inserted into each mounting hole 711h and before the mounting member 76 fixes the support plate 711 to the main body bracket 71, the support plate 711 can swing relative to the mounting member 76 inserted in the circular hole relative to the main body frame 1 within a predetermined range, thereby causing the entire drive module 7 to swing relative to the main body frame 1 within a predetermined range. It is understandable that, in order to enable the drive module 7 to perform the aforementioned oscillation, the first and second elongated oval holes provide the function of adjusting the position of the corresponding mounting part 76 in the front-rear direction D1 and the left-right direction D2. In other optional solutions, as long as the drive module 7 can perform the aforementioned oscillation, the length directions of the first and second elongated oval holes do not need to be perpendicular to each other; the length directions of the first and second elongated oval holes can be in a non-parallel relationship with other angles. Still as... Figure 13As shown, the adjusting groove 711c, in addition to having a through-hole structure, is also open on one side edge of the support plate 711, which facilitates the insertion of the eccentric pin 77 into the adjusting groove 711c. Furthermore, the adjusting groove 711c is constructed to accommodate the eccentric head 772 of the eccentric pin 77, thereby allowing the support plate 711 and the entire drive module 7 to swing relative to the main frame 1 through the rotation of the eccentric pin 77 acting on the side wall of the adjusting groove 711c via the eccentric head 772. By utilizing the swing of the drive module 7, the relative position between the drive module 7 and the slewing bearing 3 can be adjusted, thereby ensuring that the output wheel 731 of the drive module 7 and the outer ring 32 of the slewing bearing 3 are reliably engaged.

[0094] like Figure 10 and Figure 11 As shown, motor 72 is mounted on bracket 71. Motor 72 transmits power to output wheel 731 via transmission assembly 73. Transmission assembly 73 includes output wheel 731, which is driven by meshing with the outer ring 32 of slewing bearing 3; pulley coaxially arranged and driven by the rotor of motor 72; pulley coaxially arranged and driven by output wheel 731; and belt sleeved on the two pulleys. Thus, output wheel 731 and motor 72 can be arranged coaxially, so that output wheel 731 and motor 72 are driven by belt transmission. In this way, transmission assembly 73 can increase the torque from motor 72 and transmit the increased torque to outer ring 32 of slewing bearing 3 via output wheel 731. Furthermore, brake 74 is mounted on bracket 71 and located below output wheel 731 in the vertical direction D3. Brake 74 has a modular structure and can adopt various types of brakes, such as friction brakes. Thus, brake 74 can brake or release transmission assembly 73. The encoder 75 is mounted on the bracket 71 and is located below the brake 74 in the vertical direction D3. The encoder 75 has a modular construction and can be of various types, such as rotary encoders or angle encoders, thereby enabling the encoder 75 to detect the rotation angle of the output wheel 731. With this construction, the output wheel 731, brake 74, and encoder 75 are arranged side-by-side in the axial direction (vertical direction D3 in this embodiment) of the output wheel 731, with the brake 74 and encoder 75 located on the same side of the output wheel 731 in the axial direction. This layout facilitates the miniaturization of the entire drive module 7, thus occupying less space. Furthermore, it is understood that the encoder 75 can feed data back to the control unit, which can then control the brake 74 to brake and release the brake based on the data fed back by the encoder 75, thereby precisely controlling the rotation angle of the output wheel 731.

[0095] like Figures 10 to 12As shown, the eccentric pin 77 includes an insertion portion 771 and an eccentric head 772 that are fixed to each other. The insertion portion 771 is formed into a straight-extending cylindrical shape, and is inserted into the main frame 1 and can rotate about its central axis. With the insertion portion 771 inserted into the main frame 1, the eccentric head 772 is positioned in the adjustment groove 711c and is configured to be off-axis with the insertion portion 771, such that the eccentric shaft portion is configured as a cam structure. Furthermore, during the rotation of the eccentric pin 77 about the central axis of the insertion portion 771, the eccentric head 772 of the eccentric pin 77 can abut against the side wall of the adjustment groove 711c of the support plate 711, thereby driving the support plate 711 and even the entire drive module 7 to swing as described above, thereby adjusting the swing angle of the bracket 71 relative to the main frame 1 and positioning it. Therefore, the eccentric pin 77 and the adjusting groove 711c of the support plate 711 cooperate with each other to form an adjustment mechanism for adjusting the posture of the support plate 711, so that the support plate 711 can swing around the mounting part 76 inserted into the round hole during the adjustment process of the eccentric pin 77 and the adjusting groove 711c.

[0096] In this embodiment, as Figures 14 to 17 As shown, the limiting mechanism 8 includes a limiting disc 81 fixed to the outer ring 32 of the slewing bearing 3 and a limiting assembly mounted on the main frame 1. The limiting assembly can engage with different parts of the limiting disc 81 to limit the limiting disc 81 to different positions. The limiting mechanism 8 can operate in the mode of manually rotating the telescopic cylinder 2.

[0097] like Figure 14 and Figure 15 As shown, the limiting disc 81 is formed in an annular shape. The limiting disc 81 can be detachably fixed to the outer ring 32 of the slewing bearing 3, or it can be integrally formed with the outer ring 32 of the slewing bearing 3. Four notches 81c are formed on the outer periphery of the limiting disc 81, each notch 81c engaging with the shape of the limiting wheel 822 of the limiting assembly. It is understood that the number of notches 81c can be adaptively adjusted as needed, and is not limited to the specific number described in this embodiment. In this embodiment, as... Figure 14 and Figure 16As shown, the limiting assembly includes a rocker arm 821, a limiting wheel 822, and a tension spring 823 assembled together. The rocker arm 821 is constructed as an elongated rod, with one end rotatably connected to the main frame 1 and the other end connected to the main frame 1 via the tension spring 823. The tension spring 823 is constructed as a cylindrical helical spring, with one end connected to the rocker arm 821 and the other end connected to the main frame 1, thereby applying a tension spring force to the rocker arm 821. The limiting wheel 822 is disposed on the rocker arm 821 in a manner that allows it to rotate relative to the rocker arm 821. The limiting wheel 822 is shaped to fit a notch 81c, such that under the action of the tension spring force of the tension spring 823, the limiting wheel 822 presses against the limiting disc 81, thereby allowing the limiting wheel 822 to selectively engage with one of the multiple notches 81c during the rotation of the limiting disc 81 to limit the outer ring 32 to the corresponding position. In addition, the limiting mechanism 8 also includes a micro-motion sensor 85, which can detect the rotation of the limiting disk 81 and thus feed the data back to the control unit for control.

[0098] By employing the limiting mechanism 8 as described above, the telescopic cylinder 2 can be manually driven to rotate relative to the main frame 1 without the drive module 7 being used for driving. In this case, the limiting mechanism 8 can be used to position the outer ring 32 of the slewing bearing 3, thereby achieving the positioning of the telescopic cylinder 2.

[0099] To position the telescopic cylinder 2 primarily when it is manually driven, a limiting mechanism of the following variant can also be used. For example... Figure 18 and Figure 19 As shown, in a variant, the limiting disc 81 has multiple grooves or notches formed on its upper surface, which mate with the shape of the spring plunger 832 of the limiting assembly. Further, the limiting assembly includes a base 831 and a spring plunger 832. The base 831 is fixed to the main frame 1 and has a multi-bending structure, whereby the base 831 can use its own elasticity to press the spring plunger 832 against the limiting disc 81. The spring plunger 832 typically includes a plunger and a compression spring, the plunger mates with the aforementioned grooves or notches, and the plunger presses against the limiting disc 81, so that during rotation of the limiting disc 81, the limiting wheel 822 can selectively engage with one of the multiple grooves or notches to limit the outer ring 32 to the corresponding position. Figures 20 to 22As shown, in another variation, the limiting disc 81 is made of a ferromagnetic material and may not have grooves or notches formed. The limiting assembly includes a base 841 and a brake. The base 841 is fixed to the main frame 1. Two electromagnets 842 of the brake are fixed to the base 841 and positioned between two pairs of support rollers 843. The support rollers 843 are rotatably mounted on the base 841, and these support rollers 843 support the limiting disc 81, allowing the limiting disc 81 to move in contact with the support rollers 843. When the electromagnets 842 of the brake are energized, the electromagnets 842 can magnetically engage with the limiting disc 81, thereby limiting the limiting disc 81 in the corresponding position.

[0100] The specific construction of the suspension mechanism for the X-ray imaging system according to the second embodiment of this application will be described below with reference to the accompanying drawings.

[0101] like Figure 23 As shown, the structure of the suspension mechanism for the X-ray imaging system according to the second embodiment of this application is basically the same as the structure of the suspension mechanism for the X-ray imaging system according to the first embodiment of this application. The following mainly describes the differences between the two.

[0102] In this embodiment, as Figures 23 to 25 As shown, the output wheel 731 in the drive module 7 is a pulley. The drive module 7 also includes a transmission belt 732 and a tensioning pulley 733. The tensioning pulley 733 is mounted on the support frame or the bracket 71 of the drive module 7 in a manner that allows control of the tension of the transmission belt. Under the action of the tensioning pulley 733, the transmission belt 732 is tensioned and fitted onto the output wheel 731 and the outer ring 32 of the slewing bearing 3, thereby achieving a transmission connection between the drive module 7 and the outer ring 32 of the slewing bearing 3 via the transmission belt 732. In this way, the torque of the motor 72 can also be increased and transmitted to the outer ring 32 of the slewing bearing 3. In addition, the output wheel 731, the brake 74, and the encoder 75 are arranged side by side in the axial direction of the output wheel 731, with the brake 74 and the encoder 75 located on both sides of the output wheel 731 in the axial direction.

[0103] It should be understood that the above embodiments are merely exemplary and are not intended to limit this application. Those skilled in the art can make various modifications and changes to the above embodiments under the teachings of this application without departing from the scope of this application. The following supplementary description is provided regarding the technical solutions of this application.

[0104] i. It is understood that the above embodiments illustrate that the inner ring 31 of the slewing bearing 3 is fixed to the main frame 1 and the outer ring 32 is fixed to the outermost sleeve 21 of the telescopic cylinder 2, but this application is not limited thereto.

[0105] For example, in other designs, one of the inner ring 31 and the outer ring 32 of the slewing bearing 3 can be detachably connected to the main frame 1, and the other of the inner ring 31 and the outer ring 32 can be detachably connected to the outermost sleeve 21 of a plurality of sleeves 21, thereby enabling the telescopic cylinder 2 to rotate relative to the main frame 1 via the slewing bearing 3.

[0106] Correspondingly, the structure and interconnections of other components can be adapted. For example, one of the inner ring 31 and the outer ring 32 is detachably connected to the main frame 1; and / or the other of the inner ring 31 and the outer ring 32 is detachably connected to the outermost sleeve 21 of the telescopic cylinder 2.

[0107] ii. It is understood that by adopting the above-described scheme, the suspension mechanism according to this application achieves a relatively simple and low-cost structure for the support cylinder 2 to rotate relative to the main frame 1, and also exhibits good operational stability and high rotational accuracy. Furthermore, it simplifies the construction of the main frame 1 of the suspension mechanism, thereby simplifying the manufacturing process of the main frame 1.

[0108] Furthermore, the drive module 7 adopts a modular construction, facilitating disassembly, assembly, and transportation. This drive module 7 eliminates the need for a clutch, simplifying the corresponding structure and reducing costs. Moreover, even when the motor 72 of the drive module 7 is not in operation, the telescopic cylinder 2 can be manually driven to rotate relative to the main frame 1, thereby improving the operational flexibility of the suspension mechanism of this application.

[0109] It is understood that some of the components, structures, and constituent parts described above may be omitted without affecting the achievement of one or more objectives of this application. Different embodiments, examples, or aspects may be appropriately combined, as long as they do not contradict or conflict with each other.

[0110] The foregoing has described exemplary embodiments and variations of this application; however, it should be understood that various modifications may be made. For example, if the described techniques are performed in a different order and / or if components in the described system, architecture, device, or circuit are combined in different ways and / or replaced or supplemented by other components or their equivalents, achieving the same, similar, or other suitable results, these changes or modifications also fall within the scope of the claims.

Claims

1. A suspension mechanism for an X-ray imaging system, characterized in that, include: The main frame is designed to be mounted on a supporting surface and to move relative to the supporting surface. A telescopic cylinder, comprising multiple nested sleeves, capable of telescopic extension and retraction relative to the main frame; as well as A slewing bearing includes an inner ring and an outer ring that are rotatable relative to each other. One of the inner ring and the outer ring is detachably connected to the main frame, and the other of the inner ring and the outer ring is detachably connected to the outermost sleeve of a plurality of sleeves, such that the telescopic cylinder can rotate relative to the main frame via the slewing bearing.

2. The suspension mechanism for the X-ray imaging system according to claim 1, characterized in that, It also includes a plurality of first threaded connectors, one of the inner ring and the outer ring being detachably connected to the main frame via the first threaded connectors; and / or It also includes a plurality of second threaded connectors, the other of the inner ring and the outer ring being detachably connected to the outermost sleeve of the plurality of sleeves.

3. The suspension mechanism for the X-ray imaging system according to claim 2, characterized in that, The inner ring is detachably connected to the main frame, and the outer ring is detachably connected to the outermost sleeve among the plurality of sleeves.

4. The suspension mechanism for an X-ray imaging system according to any one of claims 1 to 3, characterized in that, It also includes a drive module installed on the main frame, the drive module comprising: A bracket, which is mounted on the main frame; The motor is mounted on the bracket; A transmission assembly, mounted on the bracket and configured to be drive-coupled with the motor, the transmission assembly including an output wheel that outputs torque from the motor to the other of the inner and outer rings; A brake, mounted on the bracket and configured to brake or release the transmission assembly; and An encoder, which is mounted on the bracket and configured to detect the rotation angle of the output wheel.

5. The suspension mechanism for an X-ray imaging system according to claim 4, characterized in that, The output wheel is a gear, and the other of the inner ring and the outer ring has multiple teeth, and the output wheel is in a meshing state with the other of the inner ring and the outer ring; or The output wheel is a pulley, the drive module also includes a transmission belt, and the output wheel and the other of the inner ring and the outer ring are in a belt drive state via the transmission belt.

6. The suspension mechanism for an X-ray imaging system according to claim 5, characterized in that, The drive module includes an eccentric pin and an adjustment groove formed in the bracket. The bracket is mounted on the main frame in a manner that allows it to swing relative to the main frame. The eccentric pin passes through the adjustment groove and is mounted on the main frame, such that the eccentric pin and the adjustment groove cooperate to adjust the swing angle of the bracket relative to the main frame.

7. The suspension mechanism for an X-ray imaging system according to claim 6, characterized in that, The eccentric pin includes an insertion part and an eccentric head that are fixed to each other. The insertion part is inserted into the main frame and is rotatable about its central axis. The eccentric head is positioned in the adjustment groove and is configured as a cam.

8. The suspension mechanism for an X-ray imaging system according to claim 6, characterized in that, The bracket includes a support plate having the adjustment groove, and the support plate also has a plurality of mounting holes spaced apart from the adjustment groove. The drive module includes multiple mounting components, which pass through corresponding mounting holes to mount the support plate onto the main frame. The multiple mounting holes include a circular hole, a first elongated hole, and a second elongated hole. The length directions of the first elongated hole and the second elongated hole are not parallel, so that the support plate can swing around the mounting component inserted into the circular hole during the adjustment process of the eccentric pin and the adjusting groove.

9. The suspension mechanism for an X-ray imaging system according to claim 4, characterized in that, The output wheel, the brake, and the encoder are arranged side by side along the axial direction of the output wheel, and The brake and the encoder are located on the same side of the output wheel in the axial direction, or the brake and the encoder are located on opposite sides of the output wheel in the axial direction.

10. The suspension mechanism for an X-ray imaging system according to claim 9, characterized in that, The motor is connected to the output wheel via a transmission.

11. The suspension mechanism for an X-ray imaging system according to any one of claims 1 to 3, characterized in that, It also includes a limiting mechanism, which comprises a limiting plate and a limiting component. The limiting disc is fixed to the other of the inner ring and the outer ring, and The limiting component can engage with different parts of the limiting plate to limit the limiting plate to different positions.

12. The suspension mechanism for an X-ray imaging system according to claim 11, characterized in that, The limiting assembly includes a rocker arm, a limiting wheel, and a tension spring. One end of the rocker arm is rotatably connected to the main frame, and the other end of the rocker arm is connected to the main frame via the tension spring. The limiting disc has multiple notches, and the limiting wheel is disposed on the rocker arm and matches the shape of the notches, so that the limiting wheel presses against the limiting disc under the spring force of the tension spring, thereby allowing the limiting wheel to engage with one of the multiple notches during the rotation of the limiting disc, so as to limit the other of the inner ring and the outer ring to the corresponding position.

13. The suspension mechanism for an X-ray imaging system according to claim 11, characterized in that, The limiting assembly includes a base and a spring plunger. The base is fixed to the main frame, and the spring plunger is mounted on the base. The limiting disc has multiple notches or grooves. The spring plunger includes a plunger and a compression spring. The plunger is shaped to match the notches or grooves, so that the plunger presses against the limiting disc under the spring force of the compression spring. Thus, during the rotation of the limiting disc, the plunger can selectively engage with one of the multiple notches or grooves to limit the other of the inner ring and the outer ring to the corresponding position.

14. The suspension mechanism for an X-ray imaging system according to claim 11, characterized in that, The limiting component includes a base, an electromagnet, and supporting rollers. The base is fixed to the main frame, and the electromagnet and the support roller are mounted on the base. The electromagnet and the support roller together form a component that enables the limiting disc to brake and release the brake.

15. An X-ray imaging system, characterized in that, The suspension mechanism for the X-ray imaging system included in any one of claims 1 to 14.

16. The X-ray imaging system according to claim 15, characterized in that, It also includes an angle adjustment mechanism and an X-ray generating mechanism. The X-ray imaging system is fixed to the angle adjustment mechanism by the innermost sleeve of the telescopic sleeve of the suspension mechanism, and The X-ray generating mechanism is mounted on the angle adjustment mechanism.

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