Telescopic device and guide support assembly for rotating floor

Abstract

The application relates to a telescopic device and a guide support assembly of a rotary floor, the telescopic device comprising a fixed plate, a first sliding plate and a second sliding plate, the first sliding plate being slidingly arranged on the fixed plate, the second sliding plate being slidingly arranged on the first sliding plate, a driving mechanism being arranged on the fixed plate, a transmission mechanism being arranged on the first sliding plate, the driving mechanism being connected with the first sliding plate and driving the first sliding plate to slide relative to the fixed plate between a first position and a second position; the transmission mechanism being arranged to make the second sliding plate slide relative to the first sliding plate between a third position and a fourth position in response to the sliding of the first sliding plate. The telescopic device of the application shortens the length in the retracted state on the premise of ensuring that the length in the extended state is long enough.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of proton therapy, and more particularly to a telescopic device for a rotating floor of a proton therapy device and a guide support assembly of the rotating floor. BACKGROUND

[0002] A telescopic device (for example, a telescopic rod) is a device with variable length, which has an extended state and a retracted state. In the extended state, the length is the longest, and in the retracted state, the length is the shortest.

[0003] The existing telescopic device is usually a two-layer structure, including a fixed layer and a sliding layer. The sliding layer is in sliding connection with the fixed layer. When the sliding layer slides away from the fixed layer, the telescopic device is extended. When the sliding layer slides towards the fixed layer, the telescopic device is retracted.

[0004] The length of the existing telescopic device in the extended state is determined by the extension length of the sliding layer. If the extension length of the sliding layer is large, the length of the telescopic device in the extended state is also large, but this will cause the length of the telescopic device in the retracted state to be large. If the extension length of the sliding layer is small, although the length of the telescopic device in the retracted state can be small, the length of the telescopic device in the extended state will also be small. Therefore, how to make the length of the telescopic device in the extended state long enough and the length of the telescopic device in the retracted state short enough is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] One of the purposes of the present application is to provide a telescopic device which shortens the length in the retracted state while ensuring that the length in the extended state is long enough.

[0006] In order to achieve the above purpose, the present application provides a telescopic device, which comprises a fixed plate, a first sliding plate and a second sliding plate. The first sliding plate is slidingly arranged on the fixed plate, and the second sliding plate is slidingly arranged on the first sliding plate. A driving mechanism is arranged on the fixed plate, and a transmission mechanism is arranged on the first sliding plate. The driving mechanism is connected with the first sliding plate and drives the first sliding plate to slide relative to the fixed plate between a first position and a second position. The transmission mechanism is arranged to make the second sliding plate slide relative to the first sliding plate between a third position and a fourth position in response to the sliding of the first sliding plate. When the first sliding plate is in the first position, the second sliding plate is in the third position, and the telescopic device is in the retracted state. When the first sliding plate is in the second position, the second sliding plate is in the fourth position, and the telescopic device is in the extended state.

[0007] Further, the driving mechanism comprises a motor, a screw shaft and a screw nut, the motor and the screw shaft are both mounted on the fixed plate, the motor is connected with the screw shaft, the screw nut is mounted on the screw shaft, and the first sliding plate is fixedly connected with the screw nut.

[0008] Further, the transmission mechanism comprises a first chain wheel, a second chain wheel and a chain, the first chain wheel and the second chain wheel are fixedly arranged on the first sliding plate, the chain is arranged around the first chain wheel and the second chain wheel and is engaged with the first chain wheel and the second chain wheel, the chain has a fixed part, the fixed part is fixedly connected with the fixed plate, and a driving block is fixedly arranged on the side of the chain opposite to the fixed part, and the second sliding plate is fixedly connected with the driving block.

[0009] Further, one of the fixed plate and the first sliding plate is provided with a first guide rail, the other of the fixed plate and the first sliding plate is provided with a first sliding block, and the first sliding block slides into the first guide rail; one of the first sliding plate and the second sliding plate is provided with a second guide rail, the other of the first sliding plate and the second sliding plate is provided with a second sliding block, and the second sliding block slides into the second guide rail.

[0010] The telescopic device has the advantages that two layers of sliding plate structures are arranged on the fixed plate, when the first sliding plate slides relative to the fixed plate, the second sliding plate slides relative to the first sliding plate and the fixed plate, the second sliding plate also extends or retracts when the first sliding plate extends or retracts, the length of the telescopic device in the extended state can be longer, the length of the first sliding plate and the second sliding plate can be reduced under the premise that the length in the extended state is sufficient, and thus the length of the telescopic device in the retracted state is shortened.

[0011] Another object of the present application is to provide a guide support assembly of a rotary floor, which realizes separable connection between a fixed bin and a suspended bin through a telescopic device, avoids interference between the telescopic device and a treatment head, and guarantees normal operation of the rotary floor.

[0012] In order to achieve the above objects, the present application provides a guide support assembly of a rotary floor, which comprises a fixed bin, a suspended bin and at least two telescopic devices arranged between the fixed bin and the suspended bin, and the fixed bin and the suspended bin are separably connected through the telescopic devices.

[0013] Further, the suspended bin is provided with a containing groove, the fixed plate is fixed in the containing groove, the first sliding plate and the second sliding plate are located in the containing groove when the telescopic device is in the retracted state, the first sliding plate and the second sliding plate extend out of the containing groove when the telescopic device is in the extended state, and the second sliding plate is connected with the fixed bin.

[0014] Further, the fixed compartment is provided with a fixing device, which is detachably connected with the second sliding plate.

[0015] Further, the fixing device comprises an outer frame, two abutting wheels are installed in the outer frame, the end of the second sliding plate is provided with a tongue block, the tongue block is detachably contacted with the two abutting wheels, so that the fixing device and the second sliding plate are detachably connected.

[0016] Further, the fixed compartment is provided with an extended-to-position signaling mechanism, the floating compartment is provided with a retracted-to-position signaling mechanism, when the telescopic device is in the extended state, the extended-to-position signaling mechanism sends an extended-to-position signal, when the telescopic device is in the retracted state, the retracted-to-position signaling mechanism sends a retracted-to-position signal.

[0017] Further, the extended-to-position signaling mechanism and the retracted-to-position signaling mechanism both comprise a striking shaft and a to-position switch located on one side of the striking shaft, one end of the striking shaft is connected with a spring reset device, the other end of the striking shaft is a free end, the free end is matched with the telescopic device to turn on or turn off the to-position switch, when the to-position switch is turned on, the extended-to-position signal or the retracted-to-position signal is sent.

[0018] The guiding and supporting assembly of the rotating floor realizes the detachable connection between the fixed compartment and the floating compartment through the sliding of the first sliding plate and the second sliding plate relative to the fixed plate, avoids the interference between the telescopic device and the treatment head, and guarantees the normal operation of the rotating floor. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the telescopic device in the extended state according to the embodiment of the present application;

[0020] Figure 2 It is another view of the structure schematic view of the telescopic device in the extended state according to the embodiment of the present application;

[0021] Figure 3 It is a structure schematic view of the telescopic device in the retracted state according to the embodiment of the present application;

[0022] Figure 4 It is a structure schematic view of the telescopic device in the extended state and after the second sliding plate is removed according to the embodiment of the present application;

[0023] Figure 5 It is a structure schematic view of the guiding and supporting assembly of the rotating floor according to another embodiment of the present application;

[0024] Figure 6Fig. 2 is a schematic view showing the connection relationship between the telescopic device in the extended state and the fixed bin and the floating bin according to the embodiment of the present application;

[0025] Figure 7 Fig. 3 is a schematic view showing the connection relationship between the second sliding plate of the telescopic device and the outside of the fixed bin according to the embodiment of the present application;

[0026] Figure 8 Fig. 4 is a schematic view showing the structure of the fixed device according to the embodiment of the present application;

[0027] Figure 9 Fig. 5 is a schematic view showing the structure of the extended-to-position signaling mechanism according to the embodiment of the present application;

[0028] Figure 10 Fig. 6 is a schematic view showing the position relationship between the impact shaft of the extended-to-position signaling mechanism and the outer frame of the fixed device according to the embodiment of the present application. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0030] As shown in Figure 1 , Figure 2 and Figure 3 , the telescopic device 200 comprises a fixed plate 210, a first sliding plate 220 and a second sliding plate 230, the first sliding plate 220 is slidingly arranged on the fixed plate 210, the second sliding plate 230 is slidingly arranged on the first sliding plate 220, the fixed plate 210 is provided with a driving mechanism 240, the first sliding plate 220 is provided with a transmission mechanism 250, the driving mechanism 240 is connected with the first sliding plate 220 and drives the first sliding plate 220 to slide between a first position and a second position of the fixed plate 210, the transmission mechanism 250 is used to make the second sliding plate 230 slide between a third position and a fourth position of the first sliding plate 220 in response to the sliding of the first sliding plate 220. When the first sliding plate 220 is located at the first position of the fixed plate 210, the second sliding plate 230 is located at the third position of the first sliding plate 220, as shown in Figure 3 , at this time, the first sliding plate 220 and the second sliding plate 230 are completely retracted relative to the fixed plate 210, and the telescopic device 200 is in the retracted state; when the first sliding plate 220 slides to the second position of the fixed plate 210, the second sliding plate 230 will slide to the fourth position of the first sliding plate 220, as shown in Figure 2 , at this time, the first sliding plate 220 and the second sliding plate 230 will be extended relative to the fixed plate 210, and the telescopic device 200 is in the extended state.

[0031] Continuing to refer to Figure 1 and Figure 2In some embodiments, the drive mechanism 240 can be a ball screw, which includes a motor 241, a screw shaft 242, and a screw nut 243. Both the motor 241 and the screw shaft 242 are mounted on a fixed plate 210 (e.g., the bottom side). The motor 241 is connected to the screw shaft 242, and the screw nut 243 is mounted on the screw shaft 242. The motor 241 drives the screw shaft 242 to rotate, and the screw shaft 242 then drives the screw nut 243 to slide axially, thereby converting the rotation of the screw shaft 242 into linear motion. The screw nut 243 can be fixedly connected to a first sliding plate 220, thereby causing the screw nut 243 to drive the first sliding plate 220 to slide between a first position and a second position on the fixed plate 210.

[0032] It is understood that the drive mechanism 240 may also adopt other structures, such as cylinders, as long as it can drive the first slide plate 220 to slide relative to the fixed plate 210. This invention does not limit this.

[0033] like Figure 1 and Figure 4 As shown, in some embodiments, the transmission mechanism 250 may include a first sprocket 251, a second sprocket 252, and a chain 253. The first sprocket 251 and the second sprocket 252 are fixed relative to each other on the first slide plate 220. The chain 252 surrounds the first sprocket 251 and the second sprocket 252 respectively and meshes with them to form a closed ring transmission chain structure. The chain 253 has a fixing part 2531, which is fixed to the fixing plate 210. A drive block is also fixed on the side of the chain 253 opposite to the fixing part 2531. The second slide plate 230 is fixedly connected to the drive block. When the drive mechanism 240 drives the first slide plate 220 to slide along the fixed plate 210, the first sprocket 251 and the second sprocket 252 will also move along with the first slide plate 220. Since the fixed part 2531 of the chain 253 is fixed to the fixed plate 210, it will remain fixed. Therefore, the first sprocket 251 and the second sprocket 252 will move on the chain 253 (that is, relative movement will occur between the chain 253 and the sprocket), thereby causing the drive block and the second slide plate 230 to slide relative to the first slide plate 220.

[0034] In some embodiments, the first sprocket 251 may be fixedly connected to the lead screw nut 243 of the drive mechanism 240, thereby driving the first slide plate 220 to move axially along the lead screw shaft 242.

[0035] In some embodiments, after the chain 253 passes around the first sprocket 251 and the second sprocket 252, both ends are connected to the drive block to form a closed loop, and the drive block can move synchronously with the chain 253.

[0036] In some embodiments, the first guide rail 211 can be arranged on the fixed plate 210, the first sliding block 221 is arranged on the first sliding plate 220, and the first sliding block 221 slides into the first guide rail 211, so that the first sliding plate 220 is in sliding connection with the fixed plate 210. Similarly, the second guide rail 222 can be arranged on the first sliding plate 220, and the second sliding block 231 can be arranged on the second sliding plate 230, and the second sliding block 231 slides into the second guide rail 222, so that the second sliding plate 230 is in sliding connection with the first sliding plate 220. In some other embodiments, the positions of the guide rail and the sliding block can also be interchanged, for example, the first guide rail 211 is arranged on the first sliding plate 220, and the first sliding block 221 is arranged on the fixed plate 210; the second guide rail 222 is arranged on the second sliding plate 230, and the second sliding block 231 is arranged on the first sliding plate 220.

[0037] The telescopic device 200 of the embodiment of the present application has two layers of sliding plate structures arranged on the fixed plate 210. When the first sliding plate 220 slides relative to the fixed plate 210, the second sliding plate 230 will slide relative to the first sliding plate 220 and the fixed plate 210. Since the first sliding plate 220 will also extend or retract when it extends or retracts, the length of the telescopic device 200 in the extended state can be longer. Under the premise that the length in the extended state is sufficient, the length of the first sliding plate 220 and the second sliding plate 230 can be reduced, so that the length of the telescopic device 200 in the retracted state is shortened.

[0038] The treatment head of the proton therapy device needs to rotate 360 degrees during the treatment process, which is realized by a 360-degree rotating gantry. During the rotation of the treatment head, a circular empty slot is needed as the running track of the treatment head. There is an arc-shaped pit of about 1 meter between the empty slot and the ground plane. In order to avoid the safety hazard that the patient and the doctor may fall into the pit, a floor that rotates synchronously with the treatment head is usually arranged to shield the empty slot and eliminate the safety hazard, and at the same time, the floor is more beautiful. A rotating floor is disclosed in a Chinese patent application with publication number CN114042261A, which includes a flexible chain floor assembly and two parallel guide support devices. The flexible chain floor assembly is in sliding connection with the two guide support devices. The flexible chain floor assembly has an opening, the treatment head passes through the opening and is connected with the flexible chain floor assembly, so as to drive the flexible chain floor assembly to rotate circumferentially along the guide support devices. During the rotation, the two guide support devices are fixedly connected to improve the stability. However, since the floor assembly rotates circumferentially around the guide support devices, the treatment head will inevitably interfere with the fixed device between the two guide support devices during the rotation, affecting the normal operation of the rotating floor.

[0039] Based on this, Figure 5As shown, another embodiment of the present application provides a guiding support assembly for a rotating floor, which includes axially parallel and spaced fixed and floating housings 110 and 120 (i.e. two guiding support devices), each of which is a cylindrical structure including a horizontal bottom and a circular arc portion, and each of which has floor guides arranged circumferentially on two opposite sides thereof, the two floor guides being used to connect to two ends of a floor assembly respectively so that the floor assembly slides along the circumferences of the fixed and floating housings 110 and 120, thereby enabling the treatment head to rotate with the floor assembly along the circumferences of the fixed and floating housings 110 and 120.

[0040] The fixed housing 110 is fixed to a base (e.g. a wall), and the floating housing 120 is connected to the fixed housing 110 via a telescopic device 200. The treatment head is connected to the floor assembly, and can rotate the floor assembly by ±180 degrees. For example, the fixed housing 110 can be taken as the starting point, and the treatment head can rotate counterclockwise in the positive direction, i.e. from the top end of the fixed housing 110 to the bottom end of the fixed housing 110, which is called a positive half circle. The treatment head can also rotate clockwise in the negative direction, i.e. from the top end of the fixed housing 110 to the bottom end of the fixed housing 110, which is called a negative half circle. The telescopic device 200 has a fixed end and an extended end, the fixed end is fixed to the floating housing 120, and the extended end can be extended or retracted. When the extended end is extended, the telescopic device 200 is fixedly connected to the fixed housing 110, thereby fixing the fixed housing 110 and the floating housing 120. When the extended end is retracted, the telescopic device 200 is disconnected from the fixed housing 110, thereby disconnecting the fixed housing 110 and the floating housing 120. During the rotation of the treatment head, all connecting members between the fixed housing 110 and the floating housing 120 are disconnected. If the telescopic device 200 is extended, the treatment head can interfere with the telescopic device 200. Therefore, in some embodiments, two telescopic devices 200 can be arranged on the fixed housing 110, one in the positive half circle and the other in the negative half circle. When the treatment head rotates in the positive half circle, the telescopic device 200 in the positive half circle is retracted, and the telescopic device 200 in the negative half circle is extended and connected to the fixed housing 110, thereby fixing the fixed housing 110 and the floating housing 120. Since the treatment head does not rotate in the negative half circle, the treatment head does not interfere with the telescopic device 200 in the negative half circle. When the treatment head rotates in the negative half circle, the telescopic device 200 in the negative half circle is retracted, and the telescopic device 200 in the positive half circle is extended and fixedly connected to the fixed housing 110, thereby fixing the fixed housing 110 and the floating housing 120. Since the treatment head does not rotate in the positive half circle, the treatment head does not interfere with the telescopic device 200 in the positive half circle. In this way, during the 360-degree rotation, the floating housing 120 can be connected to the fixed housing 110 via the telescopic device 200, and the treatment head does not interfere with the telescopic device 200, thereby ensuring that the treatment head can rotate by 360 degrees.

[0041] As shown, another embodiment of the present application provides a guiding support assembly for a rotating floor, which includes axially parallel and spaced fixed and floating housings 110 and 120 (i.e. two guiding support devices), each of which is a cylindrical structure including a horizontal bottom and a circular arc portion, and each of which has floor guides arranged circumferentially on two opposite sides thereof, the two floor guides being used to connect to two ends of a floor assembly respectively so that the floor assembly slides along the circumferences of the fixed and floating housings 110 and 120, thereby enabling the treatment head to rotate with the floor assembly along the circumferences of the fixed and floating housings 110 and 120. Figure 6As shown, the fixing plate 210 is fixed in the accommodating groove 121 of the floating chamber 120 (for convenience, Figure 6 The fixing chamber 110 and the floating chamber 120 are shown only with adjacent side plates, and in fact, the fixing chamber 110 and the floating chamber 120 each have a certain thickness. When the telescopic device 200 is in the extended state, the first sliding plate 220 and the second sliding plate 230 are each extended from the accommodating groove 121, and the end of the second sliding plate 230 is fixedly connected with the fixing chamber 110, so that the fixing chamber 110 and the floating chamber 120 are connected through the telescopic device 200. When the first sliding plate 220 and the second sliding plate 230 slide toward the floating chamber 120 under the driving of the driving mechanism 240, the end of the second sliding plate 230 will be disconnected with the fixing chamber 110. When the telescopic device 200 is in the retracted state, the first sliding plate 220 and the second sliding plate 230 are all located in the accommodating groove 121, so as to avoid interference with the treatment head moving between the fixing chamber 110 and the floating chamber 120.

[0042] Since the telescopic device 200 is to be completely retracted into the accommodating groove 121 when the telescopic device 200 is in the retracted state, and the width of the accommodating groove 121 is usually smaller than the distance between the fixing chamber 110 and the floating chamber 120, if the telescopic device 200 adopts the form of a conventional single-layer sliding plate, the sliding plate cannot be completely retracted into the accommodating groove 121, and the installation space is insufficient. The present application sets two layers of sliding plates, changes the single-piece sliding plate into two layers of simultaneous telescoping, so that the extended length is sufficient to connect with the fixing chamber 110, and when retracted, it can completely enter the accommodating groove 121, thereby solving the problem of insufficient installation space.

[0043] As shown in FIG. 1, Figure 7 In some embodiments, the fixing chamber 110 is provided with a fixing device 300 on the side close to the floating chamber 120 (i.e., the outer side of the fixing chamber 110), which is detachably connected with the second sliding plate 230 of the telescopic device 200. When the telescopic device 200 is in the extended state, the fixing device 300 is fixedly connected with the second sliding plate 230, and when the telescopic device 200 is retracted toward the floating chamber 120, the second sliding plate 230 is disconnected with the fixing device 300. The connection and disconnection of the second sliding plate 230 and the fixing device 300 can be automatically realized through the sliding of the second sliding plate 230, without the need for other operations.

[0044] As shown in FIG. 1, Figure 8 In some embodiments, the fixing device 300 includes an outer frame 310, two guide wheels 320 are installed in the outer frame 310, and the end of the second sliding plate 230 is provided with a tongue block 232 (see Figure 1), when the telescopic device 200 is in the extended state, the tongue block 232 is inserted into the outer frame 310, and the two sides are in contact with the two guide wheels 320 respectively, and the fixed connection of the two is realized through the friction between the two guide wheels 320 and the tongue block 232; when the driving mechanism 240 makes the second sliding plate 230 retract, the driving force overcomes the friction between the two guide wheels 320 and the tongue block 232, so that the two are separated, thereby realizing automatic connection and disconnection.

[0045] In some embodiments, the tongue block 232 can be a detachable metal block, thereby facilitating replacement. The end of the tongue block 232 close to the fixing device 300 can be provided with a certain taper chamfer, thereby facilitating its insertion between the two guide wheels 320.

[0046] In some embodiments, the guide wheel 310 is a nylon roller. The distance between the two guide wheels 310 can be adjustable, thereby adjusting the tightness of the fixing device 300 according to the size and position of the tongue block 232.

[0047] Continuing to refer to Figure 6 In some embodiments, the fixed bin 110 can also be provided with an extended-to-position signaling mechanism 400, which will trigger the extended-to-position signaling mechanism 400 when the second sliding plate 230 is in place (i.e. fixedly connected to the fixing device 300), and the extended-to-position signaling mechanism 400 will send an extended-to-position signal to the control system (not shown in the figure), so as to judge whether the telescopic device 200 is fixed to the fixed bin 110 according to the extended-to-position signal.

[0048] As shown in Figure 9 The extended-to-position signaling mechanism 400 includes an impact shaft 410 and a to-position switch 420 on one side of the impact shaft 410, the impact shaft 410 has a recess 411, one end of the impact shaft 410 is connected with a spring return device 440, and the other end is a free end which cooperates with the second sliding plate 230 to trigger the extended-to-position signaling mechanism 400. When the free end of the impact shaft 410 is not subjected to external force, the recess 411 of the impact shaft 410 is separated from the to-position switch 420, and when the free end of the impact shaft 410 is subjected to external force of the second sliding plate 230, the impact shaft 410 will move to the left, thereby making the non-recess part of the impact shaft 410 contact with the to-position switch 420 respectively, so that the to-position switch 420 is opened and an extended-to-position signal is sent.

[0049] As shown in Figure 10As shown, in some embodiments, the free end of the impact shaft 410 extends into the outer frame 310 of the fixing device 300, when the tongue 232 is inserted into the outer frame 310, the tongue 232 will push the impact shaft 410 to move left, the in-place switch 420 is turned on, thus triggering the extended-in-place signal; when the tongue 232 is removed from the outer frame 310, the external force on the free end of the impact shaft 410 disappears, under the action of the spring return device 440, the impact shaft 410 is reset, the in-place switch 420 is turned off, and the extended-in-place signal is not sent out.

[0050] In some embodiments, the extended-in-place signaling mechanism 400 can also include a limit switch 430, which is located on the other side of the impact shaft 410 opposite the in-place switch 420 and is arranged staggered with the in-place switch 420, when the limit switch is turned on, it will trigger an alarm, playing a safety protection role. For example, when the impact shaft 410 normally moves left and resets, the limit switch 430 will not be in contact with the impact shaft 410, thus not being turned on, and when the impact shaft 410 does not return to the original position during the rightward resetting process, but continues to move right, it indicates that the spring return device 440 has a problem, at this time the impact shaft 410 will be in contact with the limit switch 430, thus making the limit switch 430 turned on, triggering an alarm.

[0051] In some embodiments, the suspended bin 120 can also be provided with a retracted-in-place signaling mechanism (not shown in the figure), which can have the same structure as the extended-in-place signaling mechanism 400, when the first sliding plate 220 is retracted in place (i.e. the telescopic device 200 is in the retracted state), it makes the retracted-in-place signaling mechanism send a retracted-in-place signal, and when the first sliding plate 220 is extended, it makes the retracted-in-place signaling mechanism not send a retracted-in-place signal.

[0052] The proton therapy device can be automated by using extension and retraction signals. The control system of the proton therapy device can be electrically connected to the rotating gantry (used to drive the treatment head rotation), the extension signaling mechanism 400, the retraction signaling mechanism, and the drive mechanism 240. When the treatment head needs to rotate in the negative half-turn, the positive half-turn extension device 200 needs to extend, and the negative half-turn extension device needs to retract. The control system first controls the drive mechanism 240 of the positive half-turn extension device 200 to extend it. Upon receiving the positive half-turn extension signal, the control system stops the positive half-turn drive mechanism 240. Then, the control system controls the drive mechanism 240 of the negative half-turn extension device 200 to retract it. Upon receiving the negative half-turn retraction signal, the control system stops the negative half-turn drive mechanism 240. Finally, the control system can control the rotating gantry to rotate the treatment head in the negative half-turn. When the treatment head is rotating in the negative half-turn, if the control system does not receive the retraction signal of the negative half-turn, the control system will stop the rotating frame from rotating when the treatment head rotates to a preset angle (i.e., the position close to the telescopic device 200 of the negative half-turn) to avoid interference with the telescopic device 200.

[0053] The telescopic device 200 of this embodiment of the invention extends and retracts by sliding the first sliding plate 220 and the second sliding plate 230 relative to the fixed plate 210, thereby realizing a separable connection between the fixed chamber 110 and the suspended chamber 120, avoiding interference between the telescopic device 200 and the treatment head, and ensuring the normal operation of the rotating floor.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Various variations can be made to the above embodiments of the present invention. That is, all simple and equivalent changes and modifications made based on the claims and description of this invention fall within the protection scope of the claims of this patent. All aspects not described in detail in this invention are conventional technical content.

Claims

1. A guide support assembly for a rotating floor, the guide support assembly comprising: The fixed bin, the floating bin and at least two telescopic devices arranged between the fixed bin and the floating bin are detachably connected through the telescopic devices; The telescopic device comprises a fixed plate, a first sliding plate and a second sliding plate, the first sliding plate is slidingly arranged on the fixed plate, the second sliding plate is slidingly arranged on the first sliding plate, a driving mechanism is arranged on the fixed plate, a transmission mechanism is arranged on the first sliding plate, the driving mechanism is connected with the first sliding plate and drives the first sliding plate to slide relative to the fixed plate between a first position and a second position; the transmission mechanism is arranged to make the second sliding plate slide relative to the first sliding plate between a third position and a fourth position in response to the sliding of the first sliding plate; when the first sliding plate is located at the first position, the second sliding plate is located at the third position, and the telescopic device is in a retracted state; when the first sliding plate is located at the second position, the second sliding plate is located at the fourth position, and the telescopic device is in an extended state; The floating bin is provided with a receiving groove, and the fixed plate is fixed in the receiving groove; when the telescopic device is in the retracted state, the first sliding plate and the second sliding plate are located in the receiving groove; When the telescopic device is in the extended state, the first sliding plate and the second sliding plate are extended from the receiving groove, and the second sliding plate is connected with the fixed bin; The floating bin is provided with a receiving groove, and the fixed plate is fixed in the receiving groove; when the telescopic device is in the retracted state, the first sliding plate and the second sliding plate are located in the receiving groove; When the telescopic device is in the extended state, the first sliding plate and the second sliding plate are extended from the receiving groove, and the second sliding plate is connected with the fixed bin; The fixed bin is provided with a fixing device, the fixing device is detachably connected with the second sliding plate, and the connection and disconnection between the fixing device and the second sliding plate are automatically realized through the sliding of the second sliding plate; the fixing device comprises an outer frame, two guide wheels are installed in the outer frame, and a tongue block is arranged at the end of the second sliding plate; when the telescopic device is in the extended state, the tongue block is inserted into the outer frame and contacts the two guide wheels on both sides, and the friction between the two guide wheels and the tongue block fixes the connection between the fixing device and the second sliding plate; when the second sliding plate is retracted by the driving mechanism, the driving force of the driving mechanism overcomes the friction between the guide wheels and the tongue block to disconnect the second sliding plate from the fixing device.

2. A rotating floor guide support assembly according to claim 1, wherein, The driving mechanism comprises a motor, a lead screw shaft and a lead screw nut, the motor and the lead screw shaft are installed on the fixed plate, the motor is connected with the lead screw shaft, and the lead screw nut is installed on the lead screw shaft; the first sliding plate is fixedly connected with the lead screw nut.

3. The rotating floor guide support assembly of claim 1, wherein, The transmission mechanism comprises a first sprocket, a second sprocket and a chain, the first sprocket and the second sprocket are fixedly arranged on the first sliding plate, and the chain is arranged around the first sprocket and the second sprocket and engaged with the first sprocket and the second sprocket; The chain has a fixed part fixedly connected with the fixed plate; a driving block is fixed on the side opposite to the fixed part of the chain; and the second sliding plate is fixedly connected with the driving block.

4. The rotating floor guide support assembly of claim 1, wherein, One of the fixed plate and the first sliding plate is provided with a first guide rail, and the other of the fixed plate and the first sliding plate is provided with a first sliding block which slides into the first guide rail; one of the first sliding plate and the second sliding plate is provided with a second guide rail, and the other of the first sliding plate and the second sliding plate is provided with a second sliding block which slides into the second guide rail.

5. The rotating floor guide support assembly of claim 1, wherein, The fixed bin is provided with an extended-to-position signaling mechanism, and the floating bin is provided with a retracted-to-position signaling mechanism; when the telescopic device is in the extended state, the extended-to-position signaling mechanism sends an extended-to-position signal; and when the telescopic device is in the retracted state, the retracted-to-position signaling mechanism sends a retracted-to-position signal.

6. A rotating floor guide support assembly according to claim 5, wherein, The extended-to-position signaling mechanism and the retracted-to-position signaling mechanism each include a striking shaft and a to-position switch located on one side of the striking shaft; one end of the striking shaft is connected with a spring return device, and the other end of the striking shaft is a free end; the free end cooperates with the telescopic device to turn on or turn off the to-position switch; when the to-position switch is turned on, the extended-to-position signal or the retracted-to-position signal is sent.

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