Rotary rack of helium ion treatment device

Abstract

The invention relates to a rotating rack of a helium ion treatment device, which comprises a first rolling ring, a second rolling ring, a connecting assembly, a first supporting mechanism and a second supporting mechanism, and is characterized in that the first rolling ring is supported by the first supporting mechanism and can rotate relative to the first supporting mechanism; the second rolling ring is supported by the second supporting mechanism and can rotate relative to the second supporting mechanism; the first rolling ring and the second rolling ring are fixedly connected through the connecting assembly, a driving mechanism is arranged on the first supporting mechanism, and the driving mechanism is connected with the first rolling ring and used for driving the first rolling ring and the second rolling ring to rotate; the first rolling ring is provided with a treatment head, the connecting assembly is provided with a beam transmission assembly, and the beam transmission assembly is connected with the treatment head. The rotating rack of the helium ion treatment device is simple in structure, small in size, light in weight and low in manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of radiotherapy equipment, and more particularly to a rotating rack of a helium ion therapy device. Background Art

[0002] Compared with proton therapy, heavy ions such as helium ions and carbon ions have a sharper peak dose (i.e., bragg peak) in cancer treatment and can destroy the double-stranded DNA of molecules, with faster and sharper performance, thus providing better treatment effects.

[0003] However, heavy ions have large particle mass and high energy, which results in large volume, heavy weight and high cost of existing heavy ion therapy devices (especially their rotating frames). Therefore, how to reduce the volume and weight of the rotating frames of heavy ion therapy devices is a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0004] The object of the present invention is to provide a rotating frame of a helium ion treatment device to reduce the volume and weight of the rotating frame and reduce its manufacturing cost.

[0005] Based on the above purpose, the present invention provides a rotating frame of a helium ion therapy device, including: a first roller, a second roller, a connecting assembly, a first supporting mechanism and a second supporting mechanism, the first roller is supported by the first supporting mechanism and can rotate relative to the first supporting mechanism, the second roller is supported by the second supporting mechanism and can rotate relative to the second supporting mechanism; the first roller and the second roller are fixedly connected by the connecting assembly, the first supporting mechanism is provided with a driving mechanism, the driving mechanism is connected to the first roller, and is used to drive the first roller and the second roller to rotate; the first roller is provided with a treatment head, the connecting assembly is provided with a beam transmission assembly, and the beam transmission assembly is connected to the treatment head.

[0006] Furthermore, the connecting assembly includes a first connecting bracket and two second connecting brackets, one end of the two second connecting brackets is fixedly connected to the first roller respectively, the other end of the two second connecting brackets is fixedly connected to one end of the first connecting bracket respectively, and the other end of the first connecting bracket is fixedly connected to the second roller.

[0007] Furthermore, the connection assembly also includes a connection plate, which spans between the first rolling ring and the second rolling ring and is fixedly connected to the first connection bracket, the first rolling ring and the second rolling ring respectively.

[0008] Furthermore, the beam transmission component is arranged on the first connecting bracket and one of the second connecting brackets, and the treatment head is fixed on the second connecting bracket on which the beam transmission component is arranged; and a counterweight block for balancing the weight of the beam transmission component and the treatment head is arranged on the other second connecting bracket.

[0009] Furthermore, the beam transmission assembly includes a vacuum pipe and a plurality of beam elements arranged in sequence, the vacuum pipe passes through each beam element in sequence, one end of the vacuum pipe is connected to the accelerator, and the other end is connected to the treatment head, and each beam element includes a plurality of quadrupoles and a plurality of superconducting diodes.

[0010] Furthermore, the first supporting mechanism includes a first base and two first roller supporting assemblies, the two first roller supporting assemblies are fixed on the first base and arranged opposite to each other, and the first roller ring is supported by the two first roller supporting assemblies.

[0011] Furthermore, each of the first roller support assemblies includes a first support frame, a second support frame and a first support, the first support frame is rotatably connected to the first support, a rotatable first roller is provided on one end of the first support frame, the other end of the first support frame is rotatably connected to the second support frame, and a rotatable first roller is provided on each of the two ends of the second support frame.

[0012] Furthermore, the first roller is fixed on a roller shaft, and the roller shaft is rotatably mounted on the first support frame or the second support frame; the rotating frame also includes a braking device, and the braking device is fixed on the first support frame or the second support frame, and the braking device is used to hold the roller shaft after being triggered so that the roller shaft cannot rotate relative to the first support frame or the second support frame.

[0013] Furthermore, two first axial supporting wheels are fixed on the first base, the first rolling ring is arranged between the two first axial supporting wheels, and the two first axial supporting wheels are used to limit the axial movement of the first rolling ring.

[0014] Furthermore, the second supporting mechanism includes a second base and two slides, the two slides are relatively arranged on the second base, the slides are slidably connected to the second base and can slide axially relative to the second base; a second roller support assembly is fixed on each of the slides, the second roller ring is supported by the two second roller support assemblies, and can rotate relative to the two second roller support assemblies.

[0015] Furthermore, the second roller support assembly includes a second support and a third support frame, the second support is fixed on the slide, the third support frame is rotatably connected to the second support, a second roller is provided at each end of the third support frame, and the second roller can rotate relative to the third support frame; the second roller ring is supported by each second roller.

[0016] Furthermore, two second axial supporting wheels are provided on the third support frame, and the second rolling ring is provided between the two second axial supporting wheels so as to limit the axial movement of the second rolling ring through the two second axial supporting wheels.

[0017] The rotating frame of the helium ion treatment device of the present invention has a simple structure, a small volume, a light weight and a low manufacturing cost; its volume is comparable to that of a proton treatment device, but its treatment effect is better than that of a proton treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a rotating frame of a helium ion therapy device according to an embodiment of the present invention from one perspective;

[0019] Figure 2 is a structural schematic diagram of a rotating frame of a helium ion treatment device according to an embodiment of the present invention from another perspective;

[0020] Figure 3 It is a schematic diagram of the structure of the helium ion therapy device after removing the connecting plate according to an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a first roller support assembly of a helium ion therapy device according to an embodiment of the present invention;

[0022] Figure 5 is a schematic structural diagram of a driving mechanism of a helium ion therapy device according to an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the connection relationship between the first roller and the braking device of the helium ion treatment device according to an embodiment of the present invention;

[0024] Figure 7 It is a schematic structural diagram of a first axial supporting wheel of a helium ion therapy device according to an embodiment of the present invention;

[0025] Figure 8 Schematic diagram of the structure of a second supporting mechanism of a helium ion therapy device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings and described in detail.

[0027] like Figure 1and Figure 2 As shown, an embodiment of the present invention provides a rotating frame of a helium ion therapy device, which includes a first roller 100, a second roller 200, a connecting assembly 300, a first supporting mechanism 400 and a second supporting mechanism 500. The first roller 100 is arranged on the first supporting mechanism 400, supported by the first supporting mechanism 400, and can rotate relative to the first supporting mechanism 400; the second roller 200 is arranged on the second supporting mechanism 500, supported by the second supporting mechanism 500, and can rotate relative to the second supporting mechanism 500; the first roller 100 and the second roller 200 can be coaxially arranged and fixedly connected through the connecting assembly 300, the first supporting mechanism 400 is provided with a driving mechanism 700, and the driving mechanism 700 and the second supporting mechanism 500 are connected. The first roller 100 is connected to drive the first roller 100 to rotate. Since the second roller 200 is fixedly connected to the first roller 100, the second roller 200 will also rotate with the first roller 100. A treatment head 110 is fixed on the first roller 100. A beam transmission component 600 is provided on the connecting component 300. The beam transmission component 600 is connected to the treatment head 110 and is used to transmit the accelerated helium ion particle flow to the treatment head 110. The treatment head 110 is used to accurately aim the particle flow at the tumor tissue for radiotherapy. The beam transmission component 600 and the treatment head 110 can rotate 360 ​​degrees following the first roller 100, so that the particle flow can irradiate the patient's tumor tissue at any angle.

[0028] like Figure 3 As shown, in some embodiments, the connection assembly 300 may include a first connection bracket 310 and two second connection brackets 320, one end of the two second connection brackets 320 is fixedly connected to the first roller 100, the other end of the two second connection brackets 320 is fixedly connected to one end of the first connection bracket 310, and the other end of the first connection bracket 310 is fixedly connected to the second roller 200, thereby fixing the first roller 100 and the second roller 200 together. The connection ends of the two second connection brackets 320 and the first roller 100 may be arranged radially opposite to each other, and the first connection bracket 310 is arranged axially, so that the center of gravity of the first roller 100, the connection assembly 300 and the second roller 200 as a whole can be near the rotation center of the first roller 100 and the second roller 200.

[0029] In some embodiments, the connecting assembly 300 may further include a connecting plate 330, which spans between the first roller 100 and the second roller 200 and is fixedly connected to the first connecting bracket 310, the first roller 100 and the second roller 200, respectively. The connecting plate 330 can be used as a working platform for repairing the rotating frame. Stairs can also be provided on the connecting plate 330 for workers to climb so as to repair parts on the first roller 100 and the second roller 200. Guardrails can also be provided on the connecting plate 330 to prevent workers from falling.

[0030] In some embodiments, the beam transmission assembly 600 can be set on the first connecting bracket 310 and one of the second connecting brackets 320, and the treatment head 110 is also fixed on the second connecting bracket 320. A counterweight block 340 is provided on the other second connecting bracket 320. The counterweight block 340 is used to balance the weight of the beam transmission assembly 600 and the treatment head 110, so that the center of gravity of the overall structure formed by the first roller 100, the second roller 200, the connecting assembly 300, the beam transmission assembly 600, etc. is located near the rotation center.

[0031] In some embodiments, the beam transmission assembly 600 may include a vacuum pipe 610 and a plurality of sequentially arranged beam elements, the vacuum pipe 610 sequentially passes through each beam element, one end of the vacuum pipe 610 is connected to the accelerator, and the other end is connected to the treatment head 110, so that the particle flow accelerated by the accelerator is transmitted to the treatment head 110 through the vacuum pipe 610. Each beam element may include a plurality of quadrupole irons 620 and three superconducting dipole irons 630. The superconducting dipole irons 630 are different from conventional irons and have a higher magnetic field strength, and can complete the bending of the particle beam within a smaller bending radius, thereby reducing the overall size of the rack.

[0032] In some embodiments, the first support mechanism 400 may include a first base 410 and two first roller support assemblies 420, the two first roller support assemblies 420 are fixed on the first base 410 and arranged radially opposite to each other, and the first roller 100 is supported by the two first roller support assemblies 420 and can rotate relative to the two first roller support assemblies 420. Figure 4As shown, each first roller support assembly 420 includes a first support frame 421, a second support frame 422 and a first support 423. The first support frame 421 is rotatably connected to the first support 423. A first roller 424 is provided on one end of the first support frame 421, and the other end of the first support frame 421 is rotatably connected to the second support frame 422. A first roller 424 is provided on each of the two ends of the second support frame 422, and the first roller 424 can rotate on the first support frame 421 and the second support frame 422; the first roller ring 100 is supported on each first roller 424, and when the first roller ring 100 rotates, the first roller ring 100 will drive the first roller 424 to rotate, and there is rolling friction between the first roller ring 100 and the first roller 424. Since the first support frame 421 can rotate relative to the first support seat 423, the second support frame 422 can rotate relative to the first support frame 421, and the rotation connection point between the first support frame 421 and the first support seat 423 is between the two ends of the first support frame 421, and the rotation connection point between the second support frame 422 and the first support frame 421 is between the two ends of the second support frame 422, the roller support assembly 42 can form a "seesaw" structure. When the first roller ring 100 is placed on each first roller 424, the first support frame 421 and the second support frame 422 will adaptively rotate under the gravity of the first roller ring 100, so that each first roller 424 can always maintain close contact with the first roller ring 100.

[0033] like Figure 5 As shown, in some embodiments, the driving mechanism 700 includes a motor 710 and a first sprocket 720, the motor 710 is connected to the first sprocket 720, and the first roller 100 is provided with a second sprocket 120 (such as Figure 1 As shown in FIG. 1 , the second sprocket 120 can be coaxially arranged with the first roller 100, and an annular chain 730 is sleeved on the first sprocket 720 and the second sprocket 730 and meshes with the first sprocket 720 and the second sprocket 730, so that the first sprocket 720 and the second sprocket 730 are connected through the chain 730. When the motor 710 rotates, the first sprocket 720 can be driven to rotate, and the rotation of the first sprocket 720 causes the chain 730 to rotate, and the chain 730 causes the second sprocket 730 to rotate, thereby rotating the first roller 100.

[0034] In some embodiments, the driving mechanism 700 may further include a reducer 740, the motor 710 is connected to the reducer 740, and the reducer 740 is connected to the first sprocket 720, so that the motor 710 is decelerated by the reducer 740. The reducer 740 may be fixed on a mounting frame 750, and the mounting frame 750 is fixed on the first base 410.

[0035] like Figure 6As shown, the first roller 424 is fixed on a roller shaft 425, and the roller shaft 425 is rotatably mounted on the first support frame 421 or the second support frame 422, so that the first roller 424 can rotate relative to the first support frame 421 or the second support frame 422. The rotating frame also includes a braking device 426, which is fixed on the first support frame 421 or the second support frame 422, and is used to hold the roller shaft 425 tightly after being triggered, so that the roller shaft 425 cannot rotate, so that the first roller 424 cannot rotate either, and the friction between the first roller ring 100 and the first roller 424 will change from rolling friction to sliding friction, so that the first roller ring 100 stops rotating within the angle required by the regulations. The advantages of such a setting are: the rotating part of the rotating frame weighs tens of tons and has a large moment of inertia under high-speed motion. If it is braked directly, the brake will be too demanding. Moreover, if the brake is braked too quickly without buffering, the overshoot force on the beam transmission assembly 600 will be huge, which will cause impact on the beam element 620 and its supporting structure, and even cause the beam element 620 to fly off the rotating frame, causing major equipment damage. Therefore, the first roller 424 is braked to convert rolling friction into sliding friction, so that the maximum resistance torque of the first roller 100 is constant, that is, the product of the static friction coefficient and the mass, which protects the key equipment and makes the structure stop quickly within the scope required by regulations, and will not cause excessive impact and wear on the brake.

[0036] like Figure 7 As shown, in some embodiments, two first axial wheels 430 may be fixed on the first base 410, and the bottom of the first rolling ring 100 is arranged between the two first axial wheels 430 and abuts against them, and the first rolling ring 100 and the two first axial wheels 430 can rotate relative to each other, thereby limiting the axial movement of the first rolling ring 100 through the two first axial wheels 430, but not limiting the rotation of the first rolling ring 100.

[0037] like Figure 8As shown, in some embodiments, the second support mechanism 500 includes a second base 510 and two slides 520. The two slides 520 are radially arranged on the second base 510 relative to each other. The slides 520 are slidably connected to the second base 510 and can slide axially relative to the second base 510. A second roller support assembly 530 is fixed on each slide 520. The second roller ring 200 is supported by the two second roller support assemblies 530 and can rotate relative to the two second roller support assemblies 530. Due to thermal expansion and contraction caused by temperature changes, the axial length of the first rolling ring 100, the connecting assembly 300 and the second rolling ring 200 as a whole may change, so axial expansion and contraction will occur. If the first rolling ring 100 and the second rolling ring 200 are fixed to their respective supporting mechanisms, then the above-mentioned overall structure will produce large structural deformation and internal stress due to the inability to move axially. The above-mentioned problem can be solved by the slide 520; when the above-mentioned overall structure expands and contracts axially due to temperature changes, the second rolling ring 200 can make the slide 520 move axially to adapt to the expansion and contraction of the overall structure without generating internal stress.

[0038] In some embodiments, a slide rail is disposed on one of the slide platform 520 and the second base 510 , and a slider is disposed on the other one. The slider is slidably disposed in the slide rail so that the slide platform 520 and the second base 510 are slidably connected.

[0039] In some embodiments, the second roller support assembly 530 includes a second support 531 and a third support frame 532, the second support 531 is fixed on the slide 520, the third support frame 532 is rotatably connected to the second support 531, and a second roller 533 is provided at each end of the third support frame 532, and the second roller 533 can rotate on the third support frame 532; the second rolling ring 200 is supported on each second roller 533, and when the second rolling ring 200 rotates, the second rolling ring 200 will drive the second roller 533 to rotate, and there is rolling friction between the second rolling ring 200 and the second roller 533. The rotation connection point between the third support frame 532 and the second support 531 is located between the two ends of the third support frame 532, so that the second roller support assembly 530 will form a "seesaw" structure. When the second roller ring 200 is placed on each second roller 533, the third support frame 532 will adaptively rotate under the gravity of the second roller ring 200, so that each second roller 533 can always maintain close contact with the second roller ring 200.

[0040] In some embodiments, two second axial bearing wheels may be provided on the third support frame 532, and the bottom of the second roller 200 is provided between the two second axial bearing wheels, so that the axial movement of the second roller 200 is limited by the second axial bearing wheels. In this way, the third support frame 530 can limit the axial freedom of the second roller 200 without limiting its circumferential freedom. When thermal expansion and contraction occur due to temperature changes, the second roller 200 can move axially with the third support frame 532 and the slide 520 to adapt to temperature changes and prevent structural deformation and the generation of internal stress.

[0041] The surfaces of the first roller 424 and the second roller 533 can be large-radius arc surfaces, and the contact between them and the first roller 100 and the second roller 200 is surface contact to reduce pressure; even if the first roller 100 and the second roller 200 are deformed during rotation, the design of the large arc surface can also enable the first roller 100 and the second roller 200 to maintain frontal contact with the first roller 424 and the second roller 533 respectively.

[0042] In some embodiments, a magnetic scale and a scale may be installed on the first roller 100 to form two angle measurement systems in addition to the motor encoder to correct the zero point error of the rotating frame.

[0043] In some embodiments, a rotating floor (not shown) may be provided on the first roller 100, and the rotating floor is fixedly connected to the treatment head 110. The rotating floor is used to cover the gap, which can prevent people from falling into the gap on the one hand, and also have an aesthetic effect on the other hand.

[0044] The rotating frame of the helium ion therapy device in the embodiment of the present invention has a simple structure, small size, light weight and low manufacturing cost; its size is comparable to that of a proton therapy device, but its treatment effect is better than that of a proton therapy device.

[0045] It should be noted that the present invention (e.g., the inventive concept, etc.) has been described in the specification of this patent document and / or illustrated in the drawings according to the exemplary embodiments; the embodiments of the present invention are presented only by way of example and are not intended to limit the scope of the present invention. The structure and / or arrangement of the elements of the inventive concept embodied in the present invention as described in the specification and / or illustrated in the drawings is merely illustrative. Although the exemplary embodiments of the present invention have been described in detail in this patent document, it is readily understood by those of ordinary skill in the art that equivalents, modifications, variations, etc. of the subject matter of the exemplary embodiments and alternative embodiments are possible and are considered to be within the scope of the present invention; all of these subject matters (e.g., modifications, variations, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. It should also be noted that various / other modifications, changes, substitutions, equivalents, alterations, omissions, etc. may be made in the configuration and / or arrangement of the exemplary embodiments (e.g., in terms of concepts, designs, structures, devices, forms, assemblies, constructions, means, functions, systems, processes / methods, steps, the order of process / method steps, operations, operating conditions, performances, materials, compositions, combinations, etc.) without departing from the scope of the present invention; all of these subjects (e.g., modifications, changes, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. The scope of the present invention is not intended to be limited to the subject matter (e.g., details, structures, functions, materials, behaviors, steps, sequences, systems, results, etc.) described in the specification and / or drawings of this patent document. Considering that the claims of this patent document will be appropriately interpreted as covering the full scope of the subject matter of the present invention (e.g., including any and all such modifications, changes, embodiments, combinations, equivalents, etc.); it should be understood that the terms used in this patent document are intended to provide a description of the subject matter of the exemplary embodiments, rather than as a limitation on the scope of the present invention.

[0046] It should also be noted that, depending on the exemplary embodiment, the present invention may include conventional technologies (such as technologies implemented and / or integrated in exemplary embodiments, modifications, variations, combinations, equivalents), or may include any other applicable technologies (present and / or future) with the ability to perform the functions and processes / operations described in the specification and / or illustrated in the figures. All of these technologies (such as technologies implemented in embodiments, modifications, variations, combinations, equivalents, etc.) are considered to be within the scope of the present invention of this patent document.

Claims

1. A rotating frame of a helium ion treatment device, characterized in that: The invention comprises a first roller, a second roller, a connecting assembly, a first supporting mechanism and a second supporting mechanism, wherein the first roller is supported by the first supporting mechanism and can rotate relative to the first supporting mechanism, and the second roller is supported by the second supporting mechanism and can rotate relative to the second supporting mechanism; the first roller and the second roller are fixedly connected via the connecting assembly, the first supporting mechanism is provided with a driving mechanism, the driving mechanism is connected to the first roller and is used to drive the first roller and the second roller to rotate; the first roller is provided with a treatment head, the connecting assembly is provided with a beam transmission assembly, and the beam transmission assembly is connected to the treatment head.

2. The rotating frame of the helium ion therapy device according to claim 1, characterized in that: The connecting assembly includes a first connecting bracket and two second connecting brackets, one end of the two second connecting brackets is fixedly connected to the first roller respectively, the other end of the two second connecting brackets is fixedly connected to one end of the first connecting bracket respectively, and the other end of the first connecting bracket is fixedly connected to the second roller.

3. The rotating frame of the helium ion therapy device according to claim 2, characterized in that: The connection assembly further includes a connection plate, which spans between the first rolling ring and the second rolling ring and is fixedly connected to the first connection bracket, the first rolling ring, and the second rolling ring, respectively.

4. The rotating frame of the helium ion therapy device according to claim 2, characterized in that: The beam transmission component is arranged on the first connecting bracket and one of the second connecting brackets, and the treatment head is fixed on the second connecting bracket on which the beam transmission component is arranged; and a counterweight block for balancing the weight of the beam transmission component and the treatment head is arranged on the other second connecting bracket.

5. The rotating gantry of the helium ion therapy device according to claim 1, characterized in that: The beam transmission assembly includes a vacuum pipe and a plurality of beam elements arranged in sequence. The vacuum pipe passes through each beam element in sequence. One end of the vacuum pipe is connected to the accelerator, and the other end is connected to the treatment head. Each beam element includes a plurality of quadrupoles and a plurality of superconducting diodes.

6. The rotating gantry of the helium ion therapy device according to claim 1, characterized in that: The first supporting mechanism comprises a first base and two first roller supporting assemblies, the two first roller supporting assemblies are fixed on the first base and arranged opposite to each other, and the first rolling ring is supported by the two first roller supporting assemblies.

7. The rotating gantry of the helium ion therapy device according to claim 6, characterized in that: Each of the first roller support assemblies includes a first support frame, a second support frame and a first support, the first support frame is rotatably connected to the first support, a rotatable first roller is provided on one end of the first support frame, the other end of the first support frame is rotatably connected to the second support frame, and a rotatable first roller is provided on each of the two ends of the second support frame.

8. The rotating gantry of the helium ion therapy device according to claim 7, characterized in that: The first roller is fixed on a roller shaft, and the roller shaft is rotatably mounted on the first support frame or the second support frame; the rotating frame also includes a braking device, and the braking device is fixed on the first support frame or the second support frame. The braking device is used to hold the roller shaft after being triggered so that the roller shaft cannot rotate relative to the first support frame or the second support frame.

9. The rotating gantry of the helium ion therapy device according to claim 6, characterized in that: Two first axial wheels are fixed on the first base, the first rolling ring is arranged between the two first axial wheels, and the two first axial wheels are used to limit the axial movement of the first rolling ring.

10. The rotating gantry of the helium ion therapy device according to claim 1, characterized in that: The second supporting mechanism includes a second base and two slides, the two slides are relatively arranged on the second base, the slides are slidably connected to the second base and can slide axially relative to the second base; a second roller support assembly is fixed on each of the slides, the second roller ring is supported by the two second roller support assemblies, and can rotate relative to the two second roller support assemblies.

11. The rotating gantry of the helium ion therapy device according to claim 10, characterized in that: The second roller support assembly includes a second support and a third support frame, the second support is fixed on the slide, the third support frame is rotatably connected to the second support, a second roller is provided at each end of the third support frame, and the second roller can rotate relative to the third support frame; the second roller ring is supported by each second roller.

12. The rotating gantry of the helium ion therapy device according to claim 11, characterized in that: The third support frame is provided with two second axial supporting wheels, and the second rolling ring is arranged between the two second axial supporting wheels so as to limit the axial movement of the second rolling ring through the two second axial supporting wheels.

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