Anti-loosening anode assembly for ct tube and ct tube

Abstract

A non-loosening anode assembly for a CT tube and a CT tube are disclosed. The anode assembly includes: an anode target plate with a first through hole at its center extending along a first direction; a rotor for mounting the anode target plate to drive its rotation, the rotor including a first section protruding from the anode target plate and a second section located within the first through hole, the anode target plate and the second section being fixedly connected; a fixing nut fixedly connected to the first section; and a connecting gasket disposed between two adjacent components, the components being selected from the rotor, the anode target plate, and the fixing nut. The connecting gasket is used to penetrate the gap between the two adjacent components to connect them. The connecting gasket penetrates under at least one of the following conditions: the temperature of the connecting gasket exceeds a preset temperature threshold; the pressure on the connecting gasket exceeds a preset pressure threshold. The technical solution of this application can effectively improve the stability of the CT tube during frequent start-up and shutdown processes.

Description

Technical Field

[0001] This invention relates to the field of X-ray tube technology, and more particularly to an anti-loosening anode assembly for a CT tube and a CT tube. Background Technology

[0002] As an indispensable core component of modern medical imaging technology, the performance and stability of X-ray tubes directly affect the accuracy of medical diagnosis and patient safety. Among the many types of X-ray tubes, CT tubes play a crucial role in CT scans due to their unique working mechanism. Their high-precision focusing, high-efficiency energy conversion, complex and precise manufacturing process, and strong adaptability make CT scanning an efficient and accurate medical imaging diagnostic tool. However, because CT tubes frequently start and stop during operation, the fixing nut used to secure the anode target disk is prone to relative rotation with the rotor, and there is even a risk of it falling off, seriously affecting the stability and safety of the CT tube.

[0003] Specifically, while traditional anode target plate fixing methods can meet certain usage requirements, their limitations become apparent when facing complex operating conditions such as high-speed rotation and sudden stops. Especially after prolonged use, the fixing nuts are prone to loosening or even falling off, significantly reducing or even eliminating the axial compressive force on the anode target plate. This can directly cause the anode target plate to detach from the rotor, damaging not only the CT tube itself but also the CT gantry. For patients, this undoubtedly poses a significant safety hazard.

[0004] Therefore, there is an urgent need for a more stable and reliable fixing method between the fixing nut and the rotor to ensure the stability and safety of the CT tube during operation, thereby providing more accurate and reliable imaging support for medical diagnosis and ensuring patient safety. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide an improved anode assembly for a CT tube and a CT tube.

[0006] To address the aforementioned technical problems, this invention provides an anti-loosening anode assembly for a CT tube, comprising: an anode target disk with a first through hole at its center extending along a first direction; a rotor for mounting the anode target disk to drive its rotation, the rotor including a first segment protruding from the anode target disk and a second segment located within the first through hole, the anode target disk and the second segment being fixedly connected; a fixing nut fixedly connected to the first segment; and a connecting gasket disposed between two adjacent components, the components being selected from the rotor, the anode target disk, and the fixing nut, the connecting gasket being used to penetrate the gap between the two adjacent components to connect them; wherein the connecting gasket penetrates under at least one of the following conditions: the temperature of the connecting gasket exceeds a preset temperature threshold; or the pressure on the connecting gasket exceeds a preset pressure threshold.

[0007] Optionally, the material of the connecting pad is zirconium, palladium-cobalt alloy, or palladium-nickel alloy.

[0008] Optionally, the temperature of the connecting pad reaches the preset temperature threshold during the anode assembly testing and / or use.

[0009] Optionally, the pressure exerted on the connecting pad reaches the preset pressure threshold during the assembly of the anode assembly.

[0010] Optionally, the anode target disk directly or indirectly engages with the second threaded section, the fixing nut engages with the first threaded section, and the direction of movement of the anode target disk and the second threaded section after uncoupling is opposite to the direction of movement of the fixing nut and the first threaded section after uncoupling.

[0011] Optionally, the connecting pad further includes: a first pad cylinder disposed between the inner wall of the first through hole and the outer peripheral surface of the second section, wherein the external thread of the first pad cylinder is adapted to the internal thread of the first through hole, and the internal thread of the first pad cylinder is adapted to the external thread of the second section, and the anode target disk is indirectly threadedly connected to the second section through the first pad cylinder.

[0012] Optionally, the fixing nut includes: a circular plate portion having a second through hole, at least a portion of the first section being accommodated in the second through hole and directly or indirectly threaded to the inner wall of the second through hole; and a support portion extending from the circular plate portion toward the anode target disk, with one end of the support portion away from the circular plate portion supported on the anode target disk.

[0013] Optionally, the connecting pad includes a connecting gasket, which is at least disposed between the support and the anode target. As the connecting gasket is clamped between the support and the anode target, and as the fixing nut is screwed into the first section, the pressure acting on the connecting gasket gradually increases. When the fixing nut is screwed into place, the pressure on the connecting gasket exceeds the preset pressure threshold.

[0014] Optionally, the connecting padding material fills at least the space enclosed by the support portion, the circular plate portion, and the anode target.

[0015] Optionally, a scraping part is provided on the surface where the anode target disk and the support part are in contact, the scraping part being used to increase the roughness of the contact surface where the anode target disk and the support part are in contact during the assembly process.

[0016] Optionally, the scraping part includes at least one blind hole structure formed on the surface of the anode target disk and the support part that are in contact with each other. During the process of the fixing nut being screwed into the first section, the support part deforms toward the end face of the anode target disk, and at least a portion of the support part is squeezed into the blind hole structure to achieve mutual engagement between the support part and the blind hole structure.

[0017] Optionally, the scraping portion includes at least one protrusion on the surface of the anode target disk that fits against the support portion. During the process of the fixing nut being screwed into the first section, the support portion deforms under the pressure of the protrusion, so that the protrusion is embedded in the end face of the support portion.

[0018] Optionally, the connecting pad further includes: a second pad cylinder disposed between the inner wall of the second through hole and the outer peripheral surface of the first segment, wherein the external thread of the second pad cylinder is adapted to the internal thread of the second through hole, the internal thread of the second pad cylinder is adapted to the external thread of the first segment, and the fixing nut is indirectly threadedly connected to the first segment through the second pad cylinder.

[0019] Optionally, the outer peripheral surface of the first segment is provided with a first thread, and the outer peripheral surface of the second segment is provided with a second thread, wherein the first thread and the second thread have opposite directions of rotation.

[0020] Optionally, the anode target and the fixing nut are screwed into the corresponding section from the same end of the rotor in opposite directions, and the corresponding section is selected from the first section and the second section.

[0021] Optionally, the outer peripheral surface of the first segment is also provided with a second thread, and along the first direction, the first thread and the second thread are alternately provided on the outer peripheral surface of the first segment.

[0022] Optionally, the installed anode target and the fixing nut abut against each other in the first direction.

[0023] Optionally, the loosening direction of the anode target disk relative to the second segment is opposite to the loosening direction of the fixing nut relative to the first segment.

[0024] Optionally, along the first direction, the first through hole includes a connected threaded section and a smooth section, wherein the threaded section is adapted to engage with a second threaded section, and the rotor further includes a third section located in the smooth section, the outer peripheral surface of the third section being smooth and conforming to the inner wall of the smooth section, so that the central axis of the smooth section coincides with the central axis of the rotor.

[0025] Optionally, the diameter of the smooth section is larger than the diameter of the threaded section.

[0026] Optionally, the rotor further includes a transition section located between the first section and the second section. After the anode target is screwed through the first section in a second direction, it passes through the transition section in a first direction and is then screwed into the second section in a third direction. The fixing nut is screwed into the first section in the second direction. The fixing nut and the anode target disk are abutted in place. The second direction and the third direction are opposite.

[0027] Optionally, the cross-sectional area of ​​the transition segment is smaller than the cross-sectional area of ​​the first segment and the cross-sectional area of ​​the second segment.

[0028] Optionally, the rotor further includes a stop section spaced apart along the first direction and the first segment, the cross-sectional area of ​​the stop section being larger than the cross-sectional area of ​​the first through hole, and the anode target disk being clamped between the fixing nut and the stop section.

[0029] To address the aforementioned technical problems, embodiments of the present invention provide a CT tube, including the aforementioned anode assembly.

[0030] Compared with the prior art, the technical solution of the embodiments of the present invention has the following beneficial effects:

[0031] By adopting the technical solution of this application, a connecting gasket that can penetrate the gaps when the temperature or pressure exceeds their respective thresholds is set. The rotor, anode target plate and fixing nut and other adjacent components are tightly connected by the penetration effect, filling the tiny gaps between the components and forming a stable connection that goes beyond a simple mechanical connection. This effectively avoids relative rotation between components, solves the problems of loose fixing nuts and target plate falling off, and significantly improves the stability and safety of the anode assembly under complex working conditions.

[0032] Furthermore, by setting the movement direction of the anode target plate and the second section of the rotor to descrew in the opposite direction to the movement direction of the fixing nut and the first section of the rotor to descrew in the opposite direction, when one of them shows a tendency to loosen, the tightness of the other will be strengthened due to the opposite movement direction. This effectively prevents both from loosening at the same time, significantly improves the stability of the connection between the anode target plate and the fixing nut and the rotor, reduces the risk of the anode target plate falling off, and ensures the safe operation of the CT tube.

[0033] Furthermore, the first thread and the second thread of the second section have opposite directions of rotation. By reversing the direction of rotation of the threads, the opposite direction of movement of the threaded fit is achieved. The structure is simple and reliable. From the basic thread structure, the connection failure caused by the loosening of the fixing nut and the anode target plate in the same direction is avoided, and the stability of the connection is further consolidated.

[0034] Furthermore, the first and second threads are alternately opened on the outer circumference of the first and second sections, which increases the contact length and complexity of the threaded engagement, making the threaded connection between the anode target and the fixed nut tighter. At the same time, the alternating rotation direction makes the loosening tendency of the two mutually inhibit each other, further enhancing the overall connection's resistance to loosening and improving the durability of the structure.

[0035] Furthermore, the installed anode target plate and fixing nut, by resisting each other in the first direction, provide a continuous axial preload, preventing axial movement of the anode target plate and fixing nut. The opposite loosening directions of the anode target plate and fixing nut prevent synchronous loosening from the perspective of movement trend. The combination of these two features forms a double anti-loosening guarantee, significantly reducing the risk of connection failure due to loosening during long-term use and improving the reliability of the anode assembly. Attached Figure Description

[0036] Figure 1 This is an exploded view of an anode assembly according to an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 The cross-sectional view along the AA direction of the anode assembly in its assembled state is shown.

[0038] Figure 3 yes Figure 2 A partial enlarged view of the connection between the central fixing nut, the anode target, and the rotor;

[0039] Figure 4 yes Figure 2 Cross-sectional view of the anode plate;

[0040] Figure 5 yes Figure 1 A schematic diagram of the fixing nut in the middle;

[0041] Figure 6 yes Figure 5 The structure shown is along BB;

[0042] Figure 7 yes Figure 1 A diagram of the first and second paragraphs;

[0043] Figure 8 yes Figure 7 A schematic diagram of a variation of the structure shown;

[0044] Figure 9 yes Figure 7 A schematic diagram of another variation of the structure shown;

[0045] Figure 10 This is a schematic diagram of a first pad cylinder according to an embodiment of this application;

[0046] Figure 11 This is a schematic diagram of a second pad cylinder according to an embodiment of this application. Detailed Implementation

[0047] As mentioned in the background section, the anode assembly of existing CT tubes is prone to loosening of the anode target plate and fixing nut during use.

[0048] To address the aforementioned technical problems, this invention provides an anode assembly for a CT tube, comprising: an anode target disk with a first through hole at its center extending along a first direction; a rotor for mounting the anode target disk to drive its rotation, the rotor including a first section protruding from the anode target disk and a second section located within the first through hole, the anode target disk and the second section being threadedly engaged; and a fixing nut threadedly engaged with the first section; wherein the direction of movement of the anode target disk and the second section after unthreading is opposite to the direction of movement of the fixing nut and the first section after unthreading is unengaged.

[0049] By adopting the technical solution of this application, the movement direction of the anode target plate and the second section of the rotor to release the threaded engagement is set to be opposite to the movement direction of the fixing nut and the first section of the rotor to release the threaded engagement. This ensures that when one of them shows a tendency to loosen, the tightness of the other will be strengthened due to the opposite movement direction. This effectively prevents the anode target plate and the fixing nut from loosening at the same time, significantly improves the stability of the connection between the anode target plate and the fixing nut and the rotor, reduces the risk of the anode target plate falling off, and ensures the safe operation of the CT tube.

[0050] To make the above-mentioned objectives, features and beneficial effects of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0051] Figure 1 This is an exploded view of an anode assembly according to an embodiment of the present invention. Figure 2 yes Figure 1The diagram shows a cross-sectional view of the anode assembly in its assembled state along the AA direction.

[0052] Combination Figure 1 and Figure 2 The anode assembly 10 may include: an anode target disk 1, wherein a first through hole 11 is provided at the center of the anode target disk 1, and the first through hole 11 extends along a first direction D1; a rotor 2, for the anode target disk 1 to be fitted and drive the anode target disk 1 to rotate, the rotor 2 including a first section 21 protruding from the anode target disk 1 and a second section 22 located in the first through hole 11, the anode target disk 1 and the second section 22 being threadedly engaged; and a fixing nut 3, which is threadedly engaged with the first section 21; wherein the direction of movement of the anode target disk 1 and the second section 22 after the threaded engagement is released is opposite to the direction of movement of the fixing nut 3 after the threaded engagement with the first section 21.

[0053] Specifically, the anode assembly 10 can be used as an X-ray tube, wherein the CT tube (also known as an X-ray tube or CT scanner) can be used in medical X-ray machines, such as CT scanners and other disease detection instruments. With technological advancements, CT scanners have become widely used in the medical field due to their high resolution and intuitive, accurate diagnostic results. The CT tube serves as a core component of the CT scanner and is widely used in practice to generate X-rays; therefore, the technological sophistication of the CT tube directly affects the working effect of the CT scanner.

[0054] In a CT tube, X-rays are generated by the heating of a filament in the cathode assembly, which produces an electron beam. This electron beam is accelerated by a high-voltage electric field between the cathode assembly and the anode target disk 1, bombarding the anode target disk 1 and generating X-rays. The X-rays are reflected from the target surface of the anode target disk 1 and exit through the electron emission window, passing over the patient and being received by the CT detector to form an image. The process of electrons bombarding the anode target disk 1 generates a large amount of heat. If the bombardment position remains unchanged, the bombarded area of ​​the anode target disk 1 will generate a large amount of heat, and the rate of heat generation will be much greater than the rate of heat dissipation. When the heat accumulates to a critical value, the target surface is melted by the bombardment area, causing anode failure. Therefore, current CT tubes generally use rotating anodes, meaning that the anode target disk 1 is in a rotating state during operation. This ensures that the position of the electron beam bombarding the anode target disk 1 is constantly changing, avoiding the phenomenon of localized temperature rise damaging the anode target disk 1.

[0055] Furthermore, the anode assembly 10 may include an anode target disk 1, a rotor 2, and a retaining nut 3.

[0056] Among them, the anode target disk 1 is the core component for generating X-rays. The anode target disk 1 has a first through hole 11 extending along the first direction D1 at its center. The first through hole 11 is used to connect with the rotor 2 to realize the rotation drive of the rotor 2 on the anode target disk 1.

[0057] Furthermore, the fixing nut 3 is threadedly engaged with the first section 21 of the rotor to axially fix the anode target disk 1.

[0058] The direction of movement of the anode target disk 1 in disengaging from the second section 22 of the rotor is opposite to the direction of movement of the fixing nut 3 in disengaging from the first section 21 of the rotor. As a result, when the rotor 2 drives the anode target disk 1 to rotate, the anode target disk 1 and the fixing nut 3 will tighten together, avoiding the risk of loosening of the threads and ensuring the stability of the anode assembly 10.

[0059] In some embodiments, the outer peripheral surface of the first segment 21 is provided with a first thread, and the outer peripheral surface of the second segment 22 is provided with a second thread, wherein the first thread and the second thread have opposite directions of rotation.

[0060] Specifically, during the manufacturing process, the outer circumferential surface of the first section 21 of the rotor 2 can be machined with a first thread. This first thread is used to form a threaded engagement with the internal thread of the fixing nut 3, thereby achieving axial locking of the fixing nut 3 onto the anode target disk 1. Furthermore, the outer circumferential surface of the second section 22 of the rotor 2 is machined with a second thread. This second thread is used to form a threaded engagement with the internal thread of the inner wall of the first through hole 11 of the anode target disk 1, thereby achieving connection between the anode target disk 1 and the rotor 2.

[0061] Furthermore, the first and second threads are configured with opposite directions of rotation. For example, if the first thread is a right-hand thread, then the second thread is a left-hand thread. Or, for another example, if the first thread is a left-hand thread, then the second thread is a right-hand thread.

[0062] In practical applications, based on the inherent characteristics of threaded connections, when the threaded pair (such as the first segment 21 and the fixing nut 3, and the second segment 22 and the anode target 1 in this embodiment) needs to be disengaged, the relative rotation direction is determined by the thread direction. Therefore, the design of the first thread and the second thread having opposite rotation directions directly results in the relative rotation direction when the fixing nut 3 and the first segment 21 are disengaged being opposite to the relative rotation direction when the anode target 1 and the second segment 22 are disengaged. This structurally ensures the technical effect of opposite movement directions when disengaging the threaded connection, effectively preventing the anode target 1 and the fixing nut 3 from loosening simultaneously during operation.

[0063] In some embodiments, the anode target disk 1 and the fixing nut 3 are screwed into corresponding sections from the same end of the rotor 2 in opposite directions, the corresponding sections being selected from the first section 21 and the second section 22.

[0064] In some embodiments, the rotor 2 includes a second segment 22 and a first segment 21, wherein the first segment 21 is located on the side of the second segment 22 facing the first direction D1.

[0065] Furthermore, the inner wall of the first through hole 11 of the anode target disk 1 is provided with an internal thread that matches the second thread of the second section 22. The inner wall of the second through hole 311 of the fixing nut 3 is provided with an internal thread that matches the first thread of the first section 21.

[0066] In practical applications, both the anode target plate 1 and the fixing nut 3 can be screwed in from the end of the first segment 21 that is away from the second segment 22.

[0067] In some embodiments, the outer peripheral surface of the first segment 21 is further provided with a second thread, and the outer peripheral surface of the second segment 22 is further provided with a first thread, and the first thread and the second thread are alternately provided along the first direction D1.

[0068] In some embodiments, the anode target plate 1 and the fixing nut 3, once installed, abut against each other in the first direction D1. Thus, when the anode target plate 1 and the second segment 22, and the fixing nut 3 and the first segment 21 are all threadedly engaged, the anode target plate 1 and the fixing nut 3 form a direct axial abutment in the first direction D1. The end face of the fixing nut 3 is tightly fitted and pressed against the end face of the anode target plate 1, generating a continuous axial preload. This ensures that the threads of the anode target plate 1 and the second segment 22, and the threads of the fixing nut 3 and the first segment 21, remain tightly engaged, increasing the positive pressure between the thread teeth, thereby increasing friction and fundamentally hindering the relative rotation of the threaded pair, reducing the risk of loosening.

[0069] Furthermore, when the CT tube generates inertial load due to frequent start-stop and high-speed rotation, if the anode target plate 1 shows a loosening tendency, its movement direction will be opposite to the loosening tendency of the fixing nut 3, which is equivalent to the fixing nut 3 generating reverse resistance to the loosening of the anode target plate 1; and vice versa.

[0070] In some embodiments, combined with Figure 2 and Figure 7 The outer peripheral surfaces of the first segment 21 and the second segment 22 are alternately provided with a first thread and a second thread. The anode target 1 first engages with the second thread on the first segment 21 and rotates along the third direction D3, so that the anode target 1 moves as a whole toward the second segment 22. During the movement, when the anode target 1 passes through the first threaded section on the first segment 21, because the internal thread and the first thread have different directions of rotation, they are in a clearance fit, and the anode target 1 can continue to rotate along the third direction D3 and advance axially.

[0071] Furthermore, after the anode target disk 1 begins to contact the second section 22, its inner wall thread engages with the second thread on the second section 22, and it continues to rotate along the third direction D3, finally completing the threaded connection with the second section 22, thus realizing the assembly and positioning of the anode target disk 1.

[0072] Further, the fixing nut 3 is inserted into the end of the first segment 21 opposite to the second segment 22, and the internal thread of the second through hole 311 on the fixing nut 3 engages with the first thread on the first segment 21. Then, the fixing nut is rotated along the second direction D2 and screwed into the first segment 21. As the fixing nut is screwed in, its end face facing the anode target 1 gradually approaches the anode target 1. When fully installed, the fixing nut 3 and the anode target 1 abut against each other in the first direction D1. The second direction D2 is opposite to the third direction D3.

[0073] Due to the thread rotation design of the first segment 21 and the second segment 22, the loosening direction of the anode target 1 relative to the second segment 22 (e.g., the second direction D2) is opposite to the loosening direction of the fixing nut 3 relative to the first segment 21 (e.g., the third direction D3). The anode target 1, the fixing nut 3 and the fixing nut 3 are interlocked by axial resistance, which further hinders their respective loosening tendencies, strengthens the stability of the connection from a structural point of view, and effectively prevents loosening and falling off under long-term working conditions.

[0074] In one variation, combined Figure 2 and Figure 8 The outer peripheral surface of the first segment 21 may be alternately provided with a first thread and a second thread, while the outer peripheral surface of the second segment 22 is only provided with a second thread.

[0075] The anode target disk 1 first engages with the second thread on the first segment 21 and rotates along the third direction D3, causing the anode target disk 1 to move as a whole toward the second segment 22. During the movement, when the anode target disk 1 passes through the first threaded section on the first segment 21, because the internal thread on the inner wall of the anode target disk 1 has a different rotation direction from the first thread, the two are in a clearance fit, and the anode target disk 1 can continue to rotate along the third direction D3 and advance axially.

[0076] Furthermore, after the anode target disk 1 begins to contact the second section 22, its inner wall thread engages with the only second thread opened on the second section 22, and continues to rotate along the third direction D3, finally completing the threaded connection with the second section 22, realizing the assembly and positioning of the anode target disk 1.

[0077] Further, the fixing nut 3 is inserted into the end of the first segment 21 opposite to the second segment 22, and the internal thread of the second through hole 311 on the fixing nut 3 engages with the first thread on the first segment 21. Then, the fixing nut is rotated along the second direction D2 and screwed into the first segment 21. As the fixing nut is screwed in, its end face facing the anode target 1 gradually approaches the anode target 1. When fully installed, the fixing nut 3 and the anode target 1 abut against each other in the first direction D1. The second direction D2 is opposite to the third direction D3.

[0078] Because the first segment 21 alternates between the first and second threads, and the second segment 22 only has the second thread, the loosening direction of the anode target 1 relative to the second segment 22 (e.g., the second direction D2) is opposite to the loosening direction of the fixing nut 3 relative to the first segment 21 (e.g., the third direction D3). The anode target 1 and the fixing nut 3 interlock through axial resistance, further hindering their respective loosening tendencies, structurally strengthening the stability of the connection, and effectively preventing loosening and detachment under long-term working conditions. Compared to the aforementioned... Figure 7 The embodiment shown, Figure 8 In the embodiment shown, only the second thread can be machined on the second segment 22, which can simplify the production process and improve the overall structural strength of the rotor 2.

[0079] In another variation, combined Figure 2 and Figure 9 The rotor 2 may further include a transition section 24, which is located between the first section 21 and the second section 22. The anode target disk 1 is screwed along the second direction D2 through the first section 21, then passes through the transition section 24 along the first direction D1, and then is screwed along the third direction D3 onto the second section 22. The fixing nut 3 is screwed along the second direction D2 onto the first section 21. The fixing nut 3 and the anode target disk 1 are in abutting against each other when installed. The second direction D2 and the third direction D3 are opposite.

[0080] In some embodiments, the cross-sectional area of ​​the transition segment 24 is smaller than the cross-sectional area of ​​the first segment 21 and the cross-sectional area of ​​the second segment 22.

[0081] In some embodiments, the outer peripheral surface of the transition segment 24 is smooth.

[0082] In a specific application scenario, the assembly process of the anode target disk 1 is divided into three stages: First, the anode target disk 1 is inserted from the end of the first stage 21 away from the second stage 22, and the internal thread of its first through hole 11 engages with the first thread of the first stage 21. It is then screwed along the second direction D2 to move towards the transition stage 24 along the first direction D1. After the anode target disk 1 is completely detached from the first stage 21, it passes directly through the transition stage 24 along the first direction D1. Subsequently, the anode target disk 1 contacts the second stage 22, and the internal thread of its inner wall engages with the thread of the second stage 22. It is then screwed along the third direction D3 to finally complete the threaded connection with the second stage 22, thereby achieving the assembly and positioning of the anode target disk 1.

[0083] Furthermore, the fixing nut 3 is inserted into the end of the first segment 21 opposite to the second segment 22, and the internal thread of its second through hole 311 engages with the thread of the first segment 21. It is then screwed into the first segment 21 along the second direction D2. As the fixing nut 3 is screwed in, its end face facing the anode target disk 1 gradually approaches. When installed in place, the fixing nut 3 and the anode target disk 1 abut against each other in the first direction D1. The second direction D2 is opposite to the third direction D3.

[0084] In some embodiments, after installation, the transition section 24 is located within the first through hole 11, or within the second through hole 311, or partially within the first through hole 11 and partially within the second through hole 311.

[0085] Because the direction in which the anode target 1 is screwed onto the second section 22 (third direction D3) is opposite to the direction in which the fixing nut 3 is screwed onto the first section 21 (second direction D2), the loosening direction of the anode target 1 relative to the second section 22 is also opposite to the loosening direction of the fixing nut 3 relative to the first section 21. The two interlock through axial resistance; when one shows a tendency to loosen, the tightness of the other is strengthened due to the opposite direction, further hindering their respective loosening tendencies and structurally improving the connection stability.

[0086] Compared to the aforementioned embodiments, Figure 9 The transition section 24 in the illustrated embodiment physically separates the threaded areas of the first section 21 and the second section 22, avoiding mutual interference between the two threaded sections during processing or assembly. At the same time, it simplifies the transition process of the anode target plate 1 from the first section 21 to the second section 22 (without needing to advance through thread clearance fit), which not only improves the smoothness of assembly, but also enhances the overall rigidity of the rotor 2 due to the integrated structure of the transition section 24.

[0087] In some embodiments, the cross-sectional area of ​​the transition segment 24 is smaller than the cross-sectional area of ​​the first segment 21 and the cross-sectional area of ​​the second segment 22.

[0088] In some embodiments, combined with Figures 1 to 3 The rotor 2 further includes a stop section 25 spaced apart along the first direction D1 and the first segment 21. The cross-sectional area of ​​the stop section 25 is larger than the cross-sectional area of ​​the first through hole 11. The anode target disk 1 is clamped between the fixing nut 3 and the stop section 25.

[0089] Specifically, when the anode target plate 1 and the second section 22 are threaded into place, and the fixing nut 3 is screwed into the first section 21 and abuts against the anode target plate 1, the anode target plate 1 is axially clamped between the fixing nut 3 and the stop section 25. At this time, the stop section 25 restricts the axial movement of the anode target plate 1 from one side of the first direction D1, and the fixing nut 3 applies axial preload from the other side, forming a bidirectional clamping constraint structure. Thus, through the axial clamping of the stop section 25 and the fixing nut 3, the axial displacement space of the anode target plate 1 is completely restricted, avoiding axial movement due to inertia during CT tube operation (such as high-speed rotation or sudden stop), and preventing wear or loosening of the threaded fit due to movement. The preload generated by the axial clamping keeps the threads of the anode target plate 1 and the second section 22, and the threads of the fixing nut 3 and the first section 21, tightly engaged, increasing the positive pressure between the thread teeth, thereby increasing the friction, fundamentally hindering the relative rotation of the threaded pair, and further reducing the risk of loosening. The axial constraint of bidirectional clamping works in synergy with the circumferential constraint with the opposite direction of the thread rotation, reinforcing the connection between the anode target disk 1 and the rotor 2 from both axial and circumferential dimensions, significantly improving the stability and durability of the anode assembly under long-term complex working conditions.

[0090] In some embodiments, combined with Figures 2 to 4 Along the first direction D1, the first through hole 11 includes a connected threaded section 111 and a smooth section 112, wherein the threaded section 111 is adapted to be threadedly engaged with the second section 22, and the rotor 2 also includes a third section 23 located in the smooth section 112, wherein the outer peripheral surface of the third section 23 is smooth and fits against the inner wall of the smooth section 112, so that the central axis of the smooth section 112 coincides with the central axis of the rotor 2.

[0091] Specifically, the inner wall of the threaded section 111 is provided with an internal thread for engaging with the threaded outer circumferential surface of the second section 22 of the rotor 2, thereby realizing the threaded connection between the anode target disk 1 and the rotor 2.

[0092] Furthermore, the inner wall of the smooth section 112 is a smooth surface, and the rotor 2 also includes a third section 23, whose outer peripheral surface is smooth and closely fits the inner wall of the smooth section 112.

[0093] Therefore, the close fit between the third section 23 and the smooth section 112 can guide the axis of the anode target disk 1 to be precisely aligned with the central axis of the rotor 2 during assembly, avoiding the problems of poor thread engagement and accelerated wear caused by the eccentricity of the threaded section 111 and the second section 22. Furthermore, under the high-speed rotation condition of the CT tube, the fit between the third section 23 and the smooth section 112 can maintain the high coaxiality of the anode target disk 1 and the rotor 2, reducing vibration and additional stress caused by eccentricity, thereby improving the operational stability and service life of the anode assembly.

[0094] In some embodiments, the diameter of the smooth section 112 is larger than the diameter of the threaded section 111.

[0095] In some embodiments, along the first direction D1, the diameter of the smooth segment 112 is larger than the diameter of the threaded segment 111, and the outer circumferential dimensions of the third segment 23 perfectly match the diameter of the smooth segment 112, forming a precise surface-to-surface fit. That is, the outer circumferential surface of the third segment 23 contacts the inner wall of the smooth segment 112 with almost no gap. Thus, the small diameter of the threaded segment 111 adapts to the thread structure of the second segment 22, ensuring tight thread engagement, while the larger diameter of the smooth segment 112 matches the outer circumferential dimensions of the third segment 23, forming a surface-to-surface guide structure. This effectively simplifies the installation process and facilitates coaxial installation.

[0096] Furthermore, the surface-to-surface contact between the third segment 23 and the smooth segment 112 provides additional radial support when the CT tube rotates at high speed. Combined with the threaded connection between the threaded segment 111 and the second segment 22, it further suppresses the radial sway of the anode target disk 1. The difference in bore diameter between the smooth segment 112 and the threaded segment 111 ensures that this radial support will not weaken the axial preload of the threaded connection due to size conflict. The two work together to improve the stability of the overall structure under dynamic working conditions.

[0097] In some embodiments, combined with Figure 3 , Figure 5 and Figure 6 The fixing nut 3 includes: a circular plate portion 31 with a second through hole 311, at least a portion of the first section 21 being accommodated in the second through hole 311 and threadedly connected to the inner wall of the second through hole 311; and a support portion 32 extending from the circular plate portion 31 toward the anode target disk 1, with one end of the support portion 32 away from the circular plate portion 31 supported on the anode target disk 1.

[0098] Specifically, the circular plate portion 31 is the main body of the fixing nut 3, and has a second through hole 311. During assembly, the first section 21 of the rotor 2 is at least partially housed in the second through hole 311, and the inner wall of the second through hole 311 engages with the outer circumferential thread (such as the first thread) of the first section 21, thereby realizing the threaded connection between the fixing nut 3 and the rotor 2, and providing circumferential threaded locking force for the fixing nut.

[0099] Furthermore, the support part 32 contacts the anode target plate 1 through its end face, converting the thread preload of the circular plate part 31 into an axial support force on the anode target plate 1, ensuring that the anode target plate 1 is stably clamped between the fixing nut 3 and the rotor stop section.

[0100] Furthermore, the support portion 32 increases the contact area between the fixing nut and the anode target plate 1, avoiding local stress concentration when the circular plate portion 31 directly contacts the anode target plate 1, thus improving the fatigue resistance of the structure.

[0101] Furthermore, the support part 32 is supported on the anode target plate 1, the contact area between the support part 32 and the anode target plate 1 is smaller, and the pressure and friction between the support part 32 and the anode target plate 1 are greater, which can more effectively prevent loosening.

[0102] In some embodiments, a scraping part 5 is provided on the surface of the anode target disk 1 that is in contact with the support part 32. The scraping part 5 is used to increase the roughness of the contact surface between the anode target disk 1 and the support part 32 during the assembly process.

[0103] Specifically, when the fixing nut 3 is screwed into the first section 21 along the second direction D2, the end of the support portion 32 that is away from the circular plate portion 31 gradually approaches and eventually abuts against the contact surface of the anode target disk 1. At this time, the scraping portion 5 makes extrusive contact with the end face of the support portion 32. As the fixing nut 3 continues to tighten, the axial preload increases, and the scraping portion 5 will scrape or compress and deform the end face of the support portion 32. If the scraping portion 5 is a protrusion, it will embed into the end face of the support portion 32; if it is a depression, the end face of the support portion 32 will be filled into the depression due to extrusion. This process makes the originally smooth contact surface form an irregular concave-convex meshing.

[0104] Therefore, the static friction coefficient of the rough contact surface is much higher than that of the smooth surface, which can effectively hinder the relative rotation between the anode target plate 1 and the support part 32. Even under conditions such as high-speed rotation and emergency stop of the CT tube, the two are not prone to circumferential sliding due to inertia, thus avoiding the loss of thread preload caused by sliding.

[0105] In some embodiments, the mechanical engagement formed by the scraping part 5 changes the contact between the anode target disk 1 and the support part 32 from surface contact to concave-convex interlocking, reducing the gaps caused by vibration and thermal deformation of the contact surface and ensuring stable transmission of axial preload.

[0106] In one specific embodiment, the scraping part 5 includes at least one blind hole structure 51 formed on the surface of the anode target disk 1 that is in contact with the support part 32. During the process of the fixing nut 3 being screwed onto the first section 21, the support part 32 deforms toward the end face of the anode target disk 1, and at least a portion of the support part 32 is squeezed into the blind hole structure 51 to achieve mutual engagement between the support part 32 and the blind hole structure 51.

[0107] In practical applications, when the fixing nut 3 is screwed into the first section 21 along the second direction D2, the end face of the support part 32 facing the anode target disk 1 gradually approaches and presses against the opening area of ​​the blind hole structure 51. As the fixing nut 3 continues to tighten, the axial preload increases continuously. Under pressure, the end face of the support part 32 undergoes plastic deformation or is scratched and damaged. Some of the material on its end face is squeezed into the internal space of the blind hole structure 51, and the scraped part is continuously crushed between the fixing nut 3 and the anode target disk 1, resulting in an increase in the roughness of the contact surface. Finally, the deformed part of the support part 32 forms a tight interlock with the inner wall of the blind hole structure 51. Thus, compared to simple rough surface contact, the interlocking of the blind hole structure 51 and the deformed part of the support part 32 is a mechanical locking of concave and convex fitting, which can directly prevent the relative rotation of the two from the physical structure. Even under high-frequency vibration or instantaneous inertial force, the deformed part of the support 32 will be stuck by the inner wall of the blind hole, making it difficult to slide in the circumferential direction, thus further improving the anti-loosening effect.

[0108] In other embodiments, the scraping portion 5 includes at least one protrusion (not shown) on the surface of the anode target disk 1 that is in contact with the support portion 32. During the process of the fixing nut 3 being screwed onto the first section 21, the support portion 32 deforms under the pressure of the protrusion, so that at least a portion of the protrusion is embedded in the end face of the support portion 32.

[0109] In some embodiments, the protrusion may be, for example, a tooth-like structure.

[0110] In some embodiments, reference Figure 1 The anode assembly 10 may further include a connecting pad 4 disposed between two adjacent components, the components being selected from the rotor 2, the anode target disk 1, and the fixing nut 3. The connecting pad 4 is used to penetrate the gap between the two adjacent components to connect them. Thus, the connecting pad 4 can penetrate the gap between the two adjacent components to achieve a more secure connection between the components.

[0111] Furthermore, the connecting gasket 4 is typically made of a material with penetrating and filling properties. During assembly, under the axial pressure generated by tightening the fixing nut and the relative compression between components, the connecting gasket 4 gradually penetrates into the microscopic gaps on the contact surfaces of adjacent components, such as the uneven gaps formed by the scraping part 5, due to pressure or its own material properties. This forms a stable connecting structure within the gaps, mechanically connecting the adjacent components into one. Thus, the "bridging" structure formed through penetration upgrades the simple mechanical contact between adjacent components to material interlocking, increasing the bonding force between components. Even under high-frequency vibration or long-term stress, it can further prevent relative loosening between components, assisting structures such as threads and scraping parts.

[0112] In some embodiments, the connecting pad 4 permeates when the temperature exceeds a preset temperature threshold.

[0113] In some embodiments, the temperature threshold may be, for example, 400°C.

[0114] In some embodiments, the connecting pad 4 permeates when the pressure exceeds a preset pressure threshold.

[0115] In some embodiments, the pressure threshold may be, for example, 120 MPa.

[0116] In some embodiments, the temperature of the connecting pad 4 can reach the preset temperature threshold during the testing of the anode assembly 10.

[0117] In some embodiments, the temperature of the connecting pad 4 can reach the preset temperature threshold during the use of the anode assembly 10.

[0118] In some embodiments, the pressure exerted on the connecting pad 4 reaches the preset pressure threshold during the assembly of the anode assembly 10.

[0119] In some embodiments, the connecting pad 4 may fill the space enclosed by the support portion 32, the circular plate portion 31, and the anode target disk 1.

[0120] In some embodiments, the connecting pad 4 may include a connecting pad ring 42 disposed on the side of the fixing nut 3 away from the anode target disk 1, the connecting pad ring 42 being located at the connection between the fixing nut 3 and the first segment 21 of the rotor 2.

[0121] In some embodiments, the connecting gasket ring 42 may be activated and permeate through processes such as EBM (Electron Beam Melting) or baking, venting, or normal use of the anode assembly 10.

[0122] In some embodiments, the connecting pad 4 may further include a connecting pad 41, which may be disposed between the end face of the support portion 32 and the anode target disk 1.

[0123] In some embodiments, the connecting gasket 41 may also be disposed between the stop section 25 and the anode target disk 1.

[0124] In a typical application scenario, during the assembly process of screwing the fixing nut 3 into the first section 21, as the fixing nut 3 continues to tighten, the connecting gasket 41 between its support part 32 and the anode target plate 1, or between the anode target plate 1 and the rotor stop section 25, will be subjected to axial preload pressure. When this pressure exceeds a preset pressure threshold, the connecting gasket 41 will undergo plastic deformation or material flow, actively penetrating into the microscopic gaps at the contact surfaces of adjacent components. This process is achieved entirely through the thread tightening action during assembly, without the need for additional pressure or the introduction of other processes.

[0125] Furthermore, when the anode assembly 10 is used in equipment such as CT tubes, or during pre-shipment testing, the CT tube generates heat, causing the temperature of the connecting gasket 41 to gradually rise. When the temperature exceeds a preset temperature threshold, the material flowability of the connecting gasket 41 increases (e.g., thermoplastic sealing materials) or the penetration effect intensifies, allowing it to penetrate deeper into the gaps between components, even filling minute gaps caused by processing or long-term wear. This process is triggered by the natural thermal environment during equipment operation, requiring no additional heating or other temperature control processes. In summary, the penetration behavior of the connecting gasket 41 relies entirely on the pressure generated by tightening the fixing nut 3 during assembly and the natural temperature rise during equipment operation, without requiring additional process steps. This design utilizes both the mechanical force of the assembly process and adapts to the thermal characteristics of the working environment. Through the dual natural triggering of pressure and temperature, it ensures that the connecting gasket 41 fully penetrates the gaps, strengthens the connection and seal between components, and improves the reliability of the anode assembly.

[0126] In some embodiments, combined with Figures 2 to 5 as well as Figure 10 The connecting pad 4 may further include: a first pad cylinder 43, disposed between the inner wall of the first through hole 11 and the outer peripheral surface of the second section 22, wherein the external thread of the first pad cylinder 43 is adapted to the internal thread of the first through hole 11, and the internal thread of the first pad cylinder 43 is adapted to the external thread of the second section 22, and the anode target disk 1 is indirectly threadedly connected to the second section 22 through the first pad cylinder 43.

[0127] In some embodiments, combined with Figures 2 to 5 as well as Figure 11 The connecting pad 4 may further include: a second pad cylinder 44, disposed between the inner wall of the second through hole 311 and the outer peripheral surface of the first segment 21, wherein the external thread of the second pad cylinder 44 is adapted to the internal thread of the second through hole 311, and the internal thread of the second pad cylinder 44 is adapted to the external thread of the first segment 21, and the fixing nut 3 is indirectly threadedly connected to the first segment 21 through the second pad cylinder 44.

[0128] In some embodiments, the thickness of the first pad cylinder 43 and the second pad cylinder 44 may be less than 0.5 mm.

[0129] In some embodiments, the first pad cylinder 43 and the second pad cylinder 44 can be formed by processes such as compression molding and vacuum forming. In some embodiments, the material of the connecting pad 4 is zirconium, palladium-cobalt alloy, or palladium-nickel alloy.

[0130] In practical applications, zirconium, palladium-cobalt alloys, and palladium-nickel alloys all possess excellent high-temperature resistance, maintaining structural and performance stability in the working environment of equipment such as CT tubes (which are typically accompanied by high temperatures). When the operating temperature triggers the penetration behavior of the connecting gasket 4 (e.g., exceeding a preset temperature threshold), these materials will not oxidize, decompose, or experience a sudden drop in performance due to high temperatures, and can continuously maintain the "bridging" effect after penetration, ensuring the long-term reliability of the connection between components. These alloys have excellent ductility and plasticity, and during assembly (e.g., when the pressure generated by tightening the fixing nut 3 exceeds a preset threshold), they easily undergo plastic deformation, thus smoothly penetrating into the microscopic gaps between adjacent components, achieving a tight "material interlocking" connection and strengthening the mechanical locking effect between components.

[0131] This invention also provides a CT tube, comprising the components described above. Figures 1 to 9 The anode assembly 10 shown is similar to the one described above. The specific structure and assembly method of the anode assembly 10 are as described above and will not be repeated here.

[0132] As described above, by adopting the technical solution of this application, by setting a connecting pad 4 that can penetrate the gap when the temperature or pressure exceeds their respective thresholds, the rotor 2, anode target plate 1 and fixing nut 3 and other adjacent components are tightly connected through the penetration effect, filling the tiny gaps between the components and forming a stable connection that goes beyond a simple mechanical connection. This effectively avoids relative rotation between the components, solves the problems of loosening of fixing nut 3 and falling off target plate 1, and significantly improves the stability and safety of anode assembly 10 under complex working conditions.

[0133] Furthermore, by setting the movement direction of the second section 22 of the anode target plate 1 and the rotor 2 to release the threaded engagement to be opposite to the movement direction of the first section 21 of the fixing nut 3 and the rotor 2 to release the threaded engagement, when one of them shows a tendency to loosen, the tightness of the other will be strengthened due to the opposite movement direction. This effectively prevents both from loosening at the same time, significantly improves the stability of the connection between the anode target plate 1 and the fixing nut 3 and the rotor 2, reduces the risk of the anode target plate 1 falling off, and ensures the safe operation of the CT tube.

[0134] Furthermore, the first thread has the opposite rotation direction to the second thread of the second segment 22 of the rotor 2. By reversing the rotation direction of the threads, the opposite motion direction of the threaded engagement is achieved. The structure is simple and reliable. From the threaded basic structure, the connection failure caused by the loosening of the fixing nut 3 and the anode target plate 1 in the same direction is avoided, and the stability of the connection with the rotor 2 is further consolidated.

[0135] Furthermore, the outer circumferential surfaces of the first section 21 and the second section 22 of the rotor 2 are alternately threaded with the first thread and the second thread, which increases the contact length and complexity of the threaded engagement, making the threaded connection between the anode target disk 1 and the fixing nut 3 tighter. At the same time, the alternating rotation direction makes the loosening tendency of the two mutually inhibit each other, further enhancing the overall anti-loosening ability of the connection with the rotor 2 and improving the durability of the structure.

[0136] Furthermore, the anode target plate 1 and the fixing nut 3, once installed, abut against each other in the first direction D1, providing a continuous axial preload and preventing axial movement of the anode target plate 1 and the fixing nut 3. The opposite loosening directions of the anode target plate 1 and the fixing nut 3 prevent synchronous loosening from occurring in the same direction. This combination forms a double anti-loosening guarantee, significantly reducing the risk of connection failure due to loosening during long-term use and improving the reliability of the anode assembly 10.

[0137] It should be understood that the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document indicates that the preceding and following related objects are in an "or" relationship. As used herein, unless explicitly stated otherwise, the term "or" covers all possible combinations unless impractical. For example, if a component is declared to include A or B, then unless explicitly stated otherwise or impractical, the component can include A, or B, or A and B. As a second example, if a component is declared to include A, B, or C, then unless explicitly stated otherwise or impractical, the component can include A, or B, or C, or A and B, or A and C, or B and C, or A and B and C.

[0138] In this disclosure, "multiple" refers to two or more.

[0139] Relational terms appearing in the embodiments of this disclosure, such as "first," "second," etc., are used only to distinguish an entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Furthermore, the words "comprising," "having," and "including," and other similar forms, are intended to be equivalent in meaning and are open-ended; one or more items following any of these words do not imply an exhaustive list of such items or that they are limited to only the listed items. Exemplary embodiments have been disclosed in the drawings and specification. However, many variations and modifications can be made to these embodiments. Therefore, although specific terminology is used, it is used only in a general and descriptive sense and not for limiting purposes.

[0140] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An anti-loosening anode assembly for a CT tube, characterized in that, include: An anode target disk, wherein a first through hole is formed at the center of the anode target disk, and the first through hole extends along a first direction; A rotor is used to be fitted onto the anode target disk to drive the anode target disk to rotate. The rotor includes a first section protruding from the anode target disk and a second section located in the first through hole. The anode target disk and the second section are fixedly connected. A fixing nut is used to securely connect the segment to the first section. A connecting gasket, disposed between two adjacent components selected from the rotor, the anode target disk, and the retaining nut, is used to penetrate the gap between the two adjacent components to connect them; wherein... The bonding pad material permeates under at least one of the following conditions: The temperature of the connecting pad exceeds a preset temperature threshold, and the temperature of the connecting pad reaches the preset temperature threshold during the anode assembly testing and / or use. The pressure on the connecting gasket exceeds a preset pressure threshold, and the pressure on the connecting gasket reaches the preset pressure threshold during the assembly of the anode assembly; wherein The connecting pad also includes: A first pad cylinder is disposed between the inner wall of the first through hole and the outer peripheral surface of the second section. The external thread of the first pad cylinder is adapted to the internal thread of the first through hole, and the internal thread of the first pad cylinder is adapted to the external thread of the second section. The anode target plate is indirectly connected to the second section threadedly through the first pad cylinder.

2. The anode assembly according to claim 1, characterized in that, The material of the connecting pad is zirconium, palladium-cobalt alloy or palladium-nickel alloy.

3. The anode assembly according to claim 1, characterized in that, The fixing nut engages with the first threaded section, and the movement direction of the anode target disk and the second section after unthreading is opposite to the movement direction of the fixing nut and the first section after unthreading.

4. The anode assembly according to claim 1, characterized in that, The fixing nut includes: The circular plate portion has a second through hole, at least a portion of the first section is accommodated in the second through hole, and is directly or indirectly threaded to the inner wall of the second through hole; A support portion extends from the circular plate portion toward the anode target disk, and one end of the support portion away from the circular plate portion is supported on the anode target disk.

5. The anode assembly according to claim 4, characterized in that, The connecting pad material includes: A connecting gasket is provided at least between the support portion and the anode target plate. As the connecting gasket is clamped between the support portion and the anode target plate and the fixing nut is screwed into the first section, the pressure acting on the connecting gasket gradually increases. When the fixing nut is screwed into place, the pressure on the connecting gasket exceeds the preset pressure threshold.

6. The anode assembly according to claim 4, characterized in that, The connecting padding material at least fills the space enclosed by the support portion, the circular plate portion, and the anode target.

7. The anode assembly according to claim 4, characterized in that, A scraping part is provided on the surface where the anode target disk and the support part are in contact. The scraping part is used to increase the roughness of the contact surface where the anode target disk and the support part are in contact during the assembly process.

8. The anode assembly according to claim 7, characterized in that, The scraping part includes at least one blind hole structure formed on the surface of the anode target disk and the support part that are in contact with each other. During the process of the fixing nut being screwed into the first section, the support part deforms toward the end face of the anode target disk, and at least a portion of the support part is squeezed into the blind hole structure to achieve mutual engagement between the support part and the blind hole structure.

9. The anode assembly according to claim 7, characterized in that, The scraping part includes at least one protrusion on the surface of the anode target plate that fits against the support part. During the process of the fixing nut being screwed into the first section, the support part deforms under the pressure of the protrusion so that the protrusion is embedded in the end face of the support part.

10. The anode assembly according to claim 4, characterized in that, The connecting pad also includes: The second pad cylinder is disposed between the inner wall of the second through hole and the outer peripheral surface of the first section. The external thread of the second pad cylinder is adapted to the internal thread of the second through hole, and the internal thread of the second pad cylinder is adapted to the external thread of the first section. The fixing nut is indirectly threadedly connected to the first section through the second pad cylinder.

11. The anode assembly according to claim 1, characterized in that, The outer circumferential surface of the first segment is provided with a first thread, and the outer circumferential surface of the second segment is provided with a second thread, with the first thread and the second thread having opposite directions of rotation.

12. The anode assembly according to claim 11, characterized in that, The anode target and the fixing nut are screwed into the corresponding sections from the same end of the rotor in opposite directions, and the corresponding sections are selected from the first section and the second section.

13. The anode assembly according to claim 11, characterized in that, The outer peripheral surface of the first segment is also provided with a second thread, and along the first direction, the first thread and the second thread are alternately provided on the outer peripheral surface of the first segment.

14. The anode assembly according to claim 11, characterized in that, The installed anode target and the fixing nut abut against each other in the first direction; and / or The loosening direction of the anode target plate relative to the second section is opposite to the loosening direction of the fixing nut relative to the first section.

15. The anode assembly according to claim 11, characterized in that, Along the first direction, the first through hole includes a connected threaded section and a smooth section, wherein the threaded section is adapted to engage with a second threaded section, and the rotor further includes a third section located in the smooth section, the outer peripheral surface of the third section being smooth and conforming to the inner wall of the smooth section, so that the central axis of the smooth section coincides with the central axis of the rotor.

16. The anode assembly according to claim 15, characterized in that, The diameter of the smooth section is larger than the diameter of the threaded section.

17. The anode assembly according to claim 15, characterized in that, The rotor also includes a transition section located between the first section and the second section. After the anode target is screwed through the first section in a second direction, it passes through the transition section in a first direction and is then screwed into the second section in a third direction. The fixing nut is screwed into the first section in the second direction. The fixing nut and the anode target disk are abutted in place. The second direction and the third direction are opposite.

18. The anode assembly according to claim 17, characterized in that, The cross-sectional area of ​​the transition segment is smaller than the cross-sectional area of ​​the first segment and the cross-sectional area of ​​the second segment.

19. The anode assembly according to claim 1, characterized in that, The rotor further includes a stop section spaced along the first direction and the first segment, the cross-sectional area of ​​the stop section being larger than the cross-sectional area of ​​the first through hole, and the anode target plate being clamped between the fixing nut and the stop section.

20. A CT X-ray tube, characterized in that, Includes the anode assembly as described in any one of claims 1 to 19.

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