CN212439732U

CN212439732U - Rotating frame and radiotherapy equipment

Info

Publication number: CN212439732U
Application number: CN202020371178.8U
Authority: CN
Inventors: 郭召
Original assignee: Beijing Dayitonghui Innovation Technology Co ltd; Our United Corp
Current assignee: Dayi Innovation Factory Beijing Technology Co ltd; Our United Corp
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2021-02-02
Anticipated expiration: 2030-03-20

Abstract

The embodiment of the application provides a rotating rack and radiotherapy equipment, and the rotating rack includes fixed braced frame, bearing, cylinder to and two at least supporting component, the bearing inner race of bearing with fixed braced frame connects, and the bearing inner race of bearing is connected with cylinder one end, supporting component support the cylinder and with the cylinder rolls relatively. Therefore, the supporting component and the bearing are adopted for double supporting, the supporting rigidity and the rotating precision of the roller are improved, and efficient and accurate treatment becomes possible. The rack of the embodiment of the application is of an integral structure, the axial space is small, the rack can conveniently pass through a narrow hospital labyrinth, the transportation is flexible, and the installation is convenient.

Description

Rotating frame and radiotherapy equipment

Technical Field

The embodiment of the application relates to the technical field of medical treatment, in particular to a rotating rack and radiotherapy equipment.

Background

The rotating frame is one of the key parts of large radiotherapy equipment, and has the features of large structure and high precision. The principle of the rotating frame is as follows: if the radiation therapy is used in only one irradiation direction, normal cells between the skin and the tumor are subjected to at least 1/3 tumor radiation doses to form different degrees of damage, and the focal ratio of the treatment is increased to reduce the damage, so that one treatment process needs to irradiate from different directions, the total dose is divided into a plurality of radiation directions, and the dose of the normal tissues is greatly reduced. The rotating gantry functions to support the mechanical structure that the radiation beam irradiates the lesion from different angles.

A common rotating rack adopts a C-shaped arm structure, and the large cantilever structure has small slewing bearing, so that the rotating speed cannot be improved, the supporting rigidity is weak, the slewing precision is low, and the precision and the efficiency required by modern precise radiotherapy are difficult to meet. The rotary frame adopting the roller structure is double-supported and must be transported separately, so that the delivery time is increased. Meanwhile, the base is large in size, so that the axial size of the whole machine is influenced, and the whole machine occupies a larger space.

SUMMERY OF THE UTILITY MODEL

In view of the above, the technical problem to be solved by the embodiments of the present application is to provide a rotating gantry and a radiotherapy apparatus, so as to overcome all or part of the problems of the radiotherapy apparatus in the prior art.

The embodiment of the application provides a rotating gantry, includes:

the bearing outer ring of the bearing is connected with the fixed supporting frame, the bearing inner ring of the bearing is connected with one end of the roller, and the supporting component supports the roller and rolls relative to the roller.

Optionally, in an embodiment of the present application, the supporting assembly includes a box body, a supporting shaft and a cam bearing, the box body is connected with the fixed supporting frame, the supporting shaft is fixed in the box body, the supporting shaft is connected with a bearing inner ring of the cam bearing, and a bearing outer ring of the cam bearing is tangent to and rolls relative to the other end of the drum.

Optionally, in an embodiment of the present application, the other end of the roller is provided with a guide rail, and the bearing outer ring of the cam bearing is tangent to and rolls relative to the other end of the roller through the guide rail.

Optionally, in an embodiment of the present application, the apparatus further includes a first driving unit and a first transmission mechanism, the first transmission mechanism is connected to the roller, and the first driving unit drives the roller to rotate relative to the fixed support frame through the first transmission mechanism.

Optionally, in an embodiment of the present application, the first driving unit includes a driving motor and a second transmission mechanism, the driving motor is connected with the fixed support frame, and the driving motor drives the second transmission mechanism to cooperate with the first transmission mechanism for transmission.

Optionally, in an embodiment of the application, the first transmission mechanism is a gear ring, the second transmission mechanism is an involute worm, a transmission gear or a transmission rack, the driving motor drives the involute worm, the transmission gear or the transmission rack to rotate, and the driving motor drives the involute worm, the transmission gear or the transmission rack to be in meshing transmission with the gear ring.

Optionally, in an embodiment of the present application, the first transmission mechanism is a transmission wheel, and the second transmission mechanism is a transmission belt.

Optionally, in an embodiment of the present application, a protrusion is disposed on the driving wheel, a hole is disposed on the driving belt, and the protrusion and the hole cooperate to drive.

Optionally, in an embodiment of the present application, the method further includes: and the second driving unit drives the roller to rotate relative to the fixed supporting frame through the supporting component.

Optionally, in an embodiment of the present application, an end surface of the roller remote from the bearing is provided with an electrically conductive slip ring.

Optionally, in an embodiment of the present application, the wireless slip ring further comprises a wireless transmitter/receiver in signal communication with the conductive slip ring.

According to another aspect of the present application, there is provided in an embodiment of the present application a radiation therapy apparatus using any of the rotating gantries described above.

The rotating rack that this application embodiment provided includes fixed braced frame, bearing, cylinder to and two at least supporting component, the bearing inner race of bearing with fixed braced frame connects, and the bearing inner race of bearing is connected with cylinder one end, supporting component support the cylinder and with the cylinder rolls relatively. Therefore, the supporting component and the bearing are adopted for double supporting, the supporting rigidity and the rotating precision of the roller are improved, and efficient and accurate treatment becomes possible. The rack of the embodiment of the application is of an integral structure, the axial space is small, the rack can conveniently pass through a narrow hospital labyrinth, the transportation is flexible, and the installation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic structural diagram of a rotating gantry according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of another direction of a rotating gantry according to an embodiment of the present disclosure;

FIG. 3 is a longitudinal cross-sectional view of a rotating gantry provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a support assembly of a rotating gantry according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a driving wheel and a driving belt of a rotating frame according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a driving wheel of a rotating rack according to an embodiment of the present application.

The reference numerals denote:

1-fixed supporting frame, 2-bearing, 3-roller, 4-supporting component, 401-box, 402-supporting shaft, 403-cam bearing, 5-involute worm, 6-guide rail, 7-gear ring, 8-conductive slip ring, 9-driving motor, 10-driving wheel, 101-lug and 11-driving belt.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.

As shown in fig. 1-3, according to an embodiment of the present application, a rotating gantry includes: fixed braced frame 1, bearing 2, cylinder 3 to and two at least supporting component 4, the bearing outer lane and the fixed braced frame 1 of bearing 2 are connected, and the bearing inner circle and the 3 one end of cylinder of bearing 2 are connected, and supporting component 4 supports cylinder 3 and rolls relatively with cylinder 3.

Set up between cylinder 3 and fixed braced frame 1 through bearing 2, cylinder 3 can be under the effect of first drive unit, realize rotating for fixed braced frame 1, and simultaneously, bearing 2 is fixed through fixed braced frame 1, can support cylinder 3, and through setting up two at least supporting component 4, can be guaranteeing not to produce under the extra resistance prerequisite, supporting component 4 carries out the supporting role to cylinder 3, combine bearing 2 and supporting component 4's joint support effect, the support rigidity and the rotation precision of cylinder have been improved, make the accurate treatment of efficient possible. Meanwhile, the supporting component 4 is small and is arranged below the roller 3 and does not exceed the axial range of the roller 3. The rotating rack is of an integral structure, the axial space is small, the rotating rack can conveniently pass through a narrow hospital labyrinth, the transportation is flexible, and the installation is convenient.

Alternatively, in an embodiment of the present application, in order to realize rolling contact between the supporting member 4 and the drum 3 and realize high-rigidity support, as shown in fig. 4, the supporting member 4 includes a housing 401, a supporting shaft 402, and a cam bearing 403, the housing 401 is connected to the fixed supporting frame 1, the supporting shaft 402 is fixed in the housing 401, the supporting shaft 402 is connected to an inner bearing ring of the cam bearing 403, and an outer bearing ring of the cam bearing 403 is tangent to and rolls relative to the other end of the drum 3. The box 401 is connected with the fixed supporting frame 1 to fix the supporting component 4 in the rotating frame, the cam bearing 403 is mounted on the box 401 through the supporting shaft 402, the box 401 can limit the axial movement of the cam bearing 403, the cam bearing 403 is contacted with the roller 3 through the bearing outer ring thereof, when the roller 3 rotates, the bearing outer ring of the cam bearing 403 rotates along with the rotation, and the two rotate relatively. Through this supporting component 4, realized the effect that non-resistance supported, improved simultaneously and supported rigidity, guaranteed the gyration precision of rotating gantry, provide high-speed pivoted prerequisite, satisfied the precision and the efficiency that modern accurate radiotherapy needs.

Meanwhile, the supporting component 4 is small in size, does not affect the axial size of the whole machine, occupies small space, enables the rack to be of an integral structure, is small in axial space, can conveniently pass through a narrow hospital labyrinth, and is flexible in transportation and convenient to install.

Optionally, in an embodiment of the present application, in order to reduce the structural complexity of the drum 3 and reduce the processing difficulty of the drum, the other end of the drum 3 is provided with a guide rail 6, and the outer ring of the bearing of the cam bearing 403 is tangent to and rolls relative to the other end of the drum 3 through the guide rail 6. In order to realize the relative rolling between the roller 3 and the supporting component 4, the periphery of the roller 3 needs to have a circle of circular structure for being in tangential contact with the supporting component 4, the guide rail 6 is arranged at one end of the roller 3, and the guide rail 6 is in contact with the bearing outer ring of the cam bearing 403, so that the guide rail 6 is tangential to and rolls relative to the bearing outer ring, and the resistance-free supporting of the supporting component 4 on the roller 3 is realized.

In this embodiment, the roller 3 does not need to be changed in the overall structure, and the guide rail 6 is installed on the end surface of the roller 3 through a fixed connection, so that the requirement of the tangential contact is realized through a split connection. The size and the structural complexity of the whole structure of the roller 3 are reduced, and the processing difficulty and the processing cost are reduced accordingly. The problem of the processing cost that the volume size of structure and processing degree of difficulty brought is solved.

In the above embodiments, the drum 3 may be a general cylinder, or may be an integrally formed structure, and the drum 3 may further include structures such as a side plate and a flange, and the specific structure of the drum 3 does not affect the supporting effect of the supporting component 4.

Optionally, in an embodiment of the present application, in order to improve the stability of the drum 3 during rotation, the outer bearing ring of the cam bearing 403 is a circular arc surface adapted to the guide rail 6. The outer ring of guide rail 6 appearance is concave arc surface or recess, and the bearing inner race adaptation through cam bearing 403 designs for the arc surface, improves guide rail 6 and cam bearing 403's area of contact on the one hand, guarantees that supporting component 4 is the biggest to guide rail 6's supporting area, guarantees supporting component 4's supporting effect, and the stability when being favorable to cylinder 3 rotatory improves.

On the other hand, by the cambered surface design of the guide rail 6 and the bearing outer ring of the cam bearing 403, the bearing outer ring of the cam bearing 403 can be guided to be tangent to the guide rail 6, and the axial position of the cam bearing 403 can be limited, while ensuring that the axial direction of the cam bearing 403 is parallel to the axial direction of the drum 3.

On the premise of ensuring that the maximum contact supporting area is parallel to the axial direction, the supporting component 4 realizes high-strength and resistance-free support for the roller 3, and meanwhile, the roller 3 rolls relatively when rotating without resistance.

Alternatively, in an embodiment of the present application, in order to ensure the relative rolling effect between the supporting member 4 and the drum 3 and ensure the supporting strength of the supporting member 4, the bearing outer race of the cam bearing 403 may freely rotate 360 degrees with respect to the supporting shaft 402. The support shaft 402 and the inner bearing ring of the cam bearing 403 are ensured to be relatively static through interference fit or fixed connection, and the outer bearing ring of the cam bearing 403 and the support shaft 402 realize 360-degree free rotation when fixed on the box 401 through the support shaft 402. When the bearing outer race is free to rotate, the roller 3 or the guide rail 6 can roll relative to the bearing outer race.

Meanwhile, through the connection relationship between the support shaft 402 and the cam bearing 403, the bearing inner ring of the cam bearing 403 is stationary relative to the support shaft 402, and the support shaft 402 is fixed on the box 401, so that the whole structure of the support assembly 4 is stable, and the support assembly 4 is not loosened, and when the roller 3 rotates, the support effect of the support assembly 4 and the roller 3 or the guide rail 6 is ensured, and the roller 3 can stably rotate under the support premise of high rigidity.

Alternatively, in an embodiment of the present application, in order to provide the supporting effect of the supporting components 4 and improve the compactness of the whole mechanism of the rotating frame, as shown in fig. 2, an even number of supporting components 4 are symmetrically arranged on two sides of the axis of the drum 3. In order to realize the stable support of the roller 3, the resultant force of the plurality of support assemblies 4 to the roller 3 is vertically upward, so that the overall compactness of the rotating rack is improved, the structural complexity is simplified, and the effect is best by symmetrically arranging an even number of support assemblies 4. If the odd number of support assemblies 4 are required to achieve the effect that the resultant force is vertically upward, the machining precision and the installation precision of the support assemblies 4 are required to be high, and the machining cost and the installation difficulty are undoubtedly increased.

In this embodiment, set up supporting component 4 through the symmetry, can guarantee that its resultant of force is vertical upwards, with the gravity balance of cylinder 3, to cylinder 3's support stability best, simultaneously, the symmetry set up as long as guarantee two supporting component 4's of symmetric position height dimension unanimous can, on the mounted position, can accomplish the location installation through the effect tangent with cylinder 3 or guide rail 6, the installation degree of difficulty is low. Moreover, the symmetrical arrangement can ensure the concise degree of the structure and improve the appearance.

Optionally, in an embodiment of the present application, in order to achieve stable rotation of the driving roller 3, the rotating rack further includes a first driving unit and a first transmission mechanism, the first transmission mechanism is connected to the roller 3, and the first driving unit drives the roller 3 to rotate relative to the fixed supporting frame 1 through the first transmission mechanism. The first driving unit provides power, the first transmission mechanism drives the roller 3 to rotate, and the first transmission mechanism with stable transmission is adopted for intermediate transmission, so that stable output of the first driving unit is facilitated.

Optionally, in an embodiment of the present application, the first driving unit includes a driving motor 9 and a second transmission mechanism, the driving motor 9 is connected to the fixed supporting frame 1, and the driving motor 9 drives the second transmission mechanism to cooperate with the first transmission mechanism for transmission. By adding the second transmission mechanism, the moment applied to the driving motor 9 can be adjusted, the transmission ratio can be adjusted, the load can be reduced, and the stable output of the driving motor 9 can be facilitated. Driving motor 9 directly rotates through first drive mechanism drive roller 3 and needs great moment, and driving motor 9's load is big, and the rank requirement to driving motor 9 is high, leads to driving motor 9 cost-push simultaneously, and life reduces, and driving motor 9 receives the influence of power supply and temperature easily in high-power output simultaneously, rotates output unstablely. Therefore, the second transmission mechanism is matched with the first transmission mechanism to transmit the roller 3, the transmission ratio between the driving motor 9 and the roller 3 is improved, the power required by the rotation of the driving motor 9 is reduced, and the improvement of the transmission precision and the stability of the driving motor 9 is facilitated.

Optionally, in an embodiment of the present application, the first transmission mechanism may be a gear ring 7, the second transmission mechanism may be an involute worm 5 or a transmission gear or a transmission rack, the driving motor 9 drives the involute worm 5 or the transmission gear or the transmission rack to rotate, and the driving motor 9 drives the involute worm 5 or the transmission gear or the transmission rack to engage with the gear ring 7 for transmission. The second transmission mechanism adopts a toothed transmission structure, is matched with the gear ring to carry out meshing transmission, and has stable transmission process of rigid meshing transmission and controllable transmission.

For example, the ring gear 7 is connected to the bearing inner race of the bearing 2, and the first drive unit drives the drum 3 to rotate relative to the fixed support frame 1 via the ring gear 7. The gear ring 7 is coaxially connected with the bearing inner ring of the bearing 2, when the first driving unit drives the gear ring 7 to rotate, the gear ring 7 drives the roller 3 to rotate through the bearing inner ring, and through the coaxial arrangement, the gear ring 7 can drive the roller 3 to stably rotate.

For another example, the driving motor 9 stably drives the drum 3 to rotate with respect to the fixed support frame through the ring gear 7 at one end of the drum 3, and the support unit 4 supports the drum 3 at the other end thereof, so that the drum 3 can stably rotate by stable driving on the one hand and stable support on the other hand.

In this embodiment, the second transmission mechanism may be a transmission gear, rigid transmission is performed between the transmission gear and the gear ring 7, transmission stability is high, transmission load on the driving motor 9 may be adjusted by adjusting a transmission ratio between the transmission gear and the gear ring 7, and according to an actual equipment specification of the driving motor 9, matching adjustment between the transmission gear and the gear ring 7 may be performed, so as to ensure transmission stability of the driving motor 9.

In this embodiment, the second transmission mechanism can also be the worm 5 that gradually bursts at the seams, utilizes the worm 5 that gradually bursts at the seams and the meshing effect of ring gear 7, realizes the effect of driving motor 9 drive ring gear 7, and the worm 5 that gradually bursts at the seams has bearing capacity reinforce, and the motion is steady, and transmission efficiency is high, and advantages such as longe-lived can fine solution the transmission problem of traditional hold-in range and rack.

In this embodiment, the second transmission mechanism may also be a transmission rack, and the transmission rack can perform stable meshing transmission with the teeth 7, so as to ensure that the driving motor 9 can stably drive the drum to rotate.

Optionally, in an embodiment of the present application, in order to control the size of the rotating frame on the axis of the drum 3, reduce the occupied space, and achieve convenient carrying of the rotating frame, the axis of the involute worm 5 is perpendicular to the axis of the drum 3. The axis through worm 5 that gradually bursts at seams sets up with the axis of cylinder 3 is perpendicular, and worm 5 that gradually bursts at seams does not increase the space in 3 axial directions of cylinder, adopts the perpendicular mode that sets up of axis simultaneously, and driving motor 9 can be comparatively convenient install on fixed stay frame 1, need not be at 3 axial directions of cylinder more unnecessary mounting structure for rotatory frame is overall structure, and axial space is little, can be convenient through narrow and small hospital's labyrinth, and the transportation is nimble, simple to operate.

Meanwhile, in the embodiment, the driving motor 9 is fixed on the fixed supporting frame 1, and as no additional connecting structure exists among the driving motor 9, the involute worm 5, the gear ring 7, the bearing 2 and the fixed supporting frame 1, the whole structure is stable, and the driving effect of the driving motor 9 on the roller 3 is the best under the condition of the minimum connecting stage number.

Optionally, in an embodiment of the present application, in order to ensure stability of the driving motor 9 during the transmission process and ensure stable engagement of the involute worm 5 with the gear ring 7, an axis of the involute worm 5 is horizontally disposed along the fixed support frame 1. When the horizontally arranged involute worm 5 driving motor 9 rotates the involute worm 5, the involute worm 5 is not easy to shake in the circumferential direction, the meshing effect between the involute worm 5 and the gear ring 7 is the most stable, and the driving motor 9 drives the gear ring 5 the most stable.

Optionally, in an embodiment of the present application, in order to improve the stability of the driving motor 9 at low speed rotation, the driving motor 9 is a torque motor. The torque motor is a special motor with a large number of poles, can continuously run at a low speed of the motor even when the motor is locked, and cannot cause damage to the motor. In this mode of operation, the motor can provide a steady torque to the load. The torque motor can also provide torque opposite to the running direction, so that the problem of unstable low-speed motion of the traditional servo motor is avoided.

Alternatively, as shown in fig. 5, in one embodiment of the present application, the first transmission mechanism may be a transmission wheel 10 and the second transmission mechanism is a transmission belt 11. According to the radiotherapy equipment of the practical use of the rotating mechanism, a combined structure of the driving wheel 10 and the driving belt 11 can be adopted, the driving belt 11 has the advantages of convenient replacement and low maintenance cost, and the matching mode of the driving belt 11 and the driving wheel 10 in the prior art is abundant, so that the radiotherapy equipment is easy to be directly applied to the embodiment of the application.

Alternatively, as shown in fig. 6, in an embodiment of the present application, the driving wheel 10 may be provided with a protrusion 101, and the driving belt 11 may be provided with a hole, and the protrusion 101 is engaged with the hole for driving. In order to ensure the stability of transmission, the phenomena of slipping and the like between the transmission wheel 10 and the transmission belt 11 cannot occur, the structure of the bulge 101 and the hole are adopted for matching, so that the meshing transmission effect similar to that between gears can be formed between the transmission wheel 10 and the transmission belt 11, and the slipping problem cannot occur in the transmission process.

Optionally, in an embodiment of the present application, the rotating gantry may further include: and a second driving unit which drives the drum 3 to rotate relative to the fixed support frame 1 through the support assembly 4. The rolling relation of supporting component 4 and cylinder 3 can also be used for the transmission, and the second drive unit rotates through drive supporting component 4, can realize except utilizing first drive unit as the power source of cylinder 3, forms the second power source, can work with first drive unit synchronization, also can separately work, and during synchronous working, can reduce first drive unit's load, the stability that is favorable to first drive unit output.

Alternatively, in an embodiment of the present application, the second driving unit is disposed on at least one side of the drum 3, respectively corresponding to the supporting members 4. Through to the actual in service behavior, can set up a second drive unit on every supporting component 4, also can set up in one side, to the power and the specification of the second drive unit that adopt, the transmission mode is different, and the setting position of second drive unit is nimble.

Optionally, in an embodiment of the present application, the second driving unit is a friction drive. The supporting component 4 utilizes the gravity of the roller 3, a large static friction force exists between the supporting component 4 and the roller 3, the transmission mechanism between the supporting component 4 and the roller 3 can be saved by relying on the static friction force to carry out transmission, the occupation of the space is reduced, and the whole structure of the rack is more compact.

Optionally, in an embodiment of the present application, in order to realize the electrical connection of the radiation unit inside the drum 3 during the rotation of the rotating gantry, the end surface of the drum 3 remote from the bearing 2 is provided with an electrically conductive slip ring 8. The conductive slip ring 8 can provide multi-channel transmission of rotating power, data and signals, greatly simplifies the structure of a rotating rack system, and avoids the phenomenon that a lead is sprained in the rotating process. The power and signal transmission between the stationary and rotating parts of the frame is achieved by means of conductive slip rings 8 fixed to the end faces of the drum 3.

Optionally, in an embodiment of the present application, the present embodiment further includes a wireless transmitting device/wireless receiving device in signal communication with the conductive slip ring 8, so as to better implement transmission and reception of signals.

According to another aspect of the application, a radiotherapy apparatus employs the rotating gantry described above. By adopting the rotating frame, the problems of the existing radiotherapy equipment are solved, the supporting rigidity and the rotating precision of the roller are improved, and efficient and accurate treatment becomes possible. The rotating rack is of an integral structure, the axial space is small, the rotating rack can conveniently pass through a narrow hospital labyrinth, the transportation is flexible, and the installation is convenient.

Of course, it is not necessary for any particular embodiment of the present application to achieve all of the above advantages at the same time.

While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application. It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the embodiments of the present application and their equivalents, the embodiments of the present application are intended to include such modifications and variations as well.

Claims

1. A rotating gantry, comprising:

the bearing support device comprises a fixed support frame (1), a bearing (2), a roller (3) and at least two support components (4), wherein a bearing outer ring of the bearing (2) is connected with the fixed support frame (1), a bearing inner ring of the bearing (2) is connected with one end of the roller (3), and the support components (4) support the roller (3) and roll relatively to the roller (3).

2. A rotating frame according to claim 1, characterized in that said supporting assembly (4) comprises a box (401), a supporting shaft (402) and a cam bearing (403), said box (401) being connected to said fixed supporting frame (1), said supporting shaft (402) being fixed in said box (401), said supporting shaft (402) being connected to an inner bearing ring of said cam bearing (403), said outer bearing ring of said cam bearing (403) being tangential to and rolling relative to the other end of said drum (3).

3. A rotating frame according to claim 2, characterized in that the other end of the drum (3) is provided with a guide rail (6), and the outer ring of the cam bearing (403) is tangential to and rolls against the other end of the drum (3) via the guide rail (6).

4. A rotating frame according to any one of claims 1 to 3, further comprising a first driving unit and a first transmission mechanism, said first transmission mechanism being connected to said drum (3), said first driving unit driving said drum (3) in rotation with respect to said fixed supporting frame (1) through said first transmission mechanism.

5. A rotating frame according to claim 4, characterized in that said first driving unit comprises a driving motor (9) and a second transmission mechanism, said driving motor (9) is connected with said fixed supporting frame (1), said driving motor (9) drives said second transmission mechanism to cooperate with said first transmission mechanism for transmission.

6. The rotating frame according to claim 5, characterized in that the first transmission mechanism is a gear ring (7), the second transmission mechanism is an involute worm (5) or a transmission gear or a transmission rack, the drive motor (9) drives the involute worm (5) or the transmission gear or the transmission rack to rotate, and the drive motor (9) drives the involute worm (5) or the transmission gear or the transmission rack to be in meshing transmission with the gear ring (7).

7. A rotating gantry according to claim 5, wherein said first transmission means is a transmission wheel (10) and said second transmission means is a transmission belt (11).

8. A rotating frame according to claim 7, characterized in that the driving wheel (10) is provided with a protrusion (101), the driving belt (11) is provided with a hole, and the protrusion (101) is in transmission fit with the hole.

9. The rotating gantry of any one of claims 1 to 3, further comprising: a second drive unit driving the drum (3) to rotate relative to the fixed support frame (1) through the support assembly (4).

10. A rotating gantry according to claim 1, characterized in that the end surface of the drum (3) remote from the bearing (2) is provided with an electrically conductive slip ring (8).

11. A rotating gantry according to claim 10, further comprising a wireless transmitter/receiver in signal communication with the conductive slip ring (8).

12. A radiotherapy apparatus comprising a rotating gantry according to any one of claims 1 to 11.