Rotating gantry feedback mechanism and medical device having the same

Abstract

The utility model discloses a kind of rotary gantry feedback mechanism and medical equipment with it, rotary gantry feedback mechanism includes: installation component, installation component is fixed on base;Multiple friction wheels, friction wheel is rotatably installed on installation component, friction wheel is configured to be contacted by adjusting installation component and rotary gantry mutual resistance, so that rotary gantry rotation drives friction wheel synchronous rotation;Multiple encoders, encoder is installed on installation component and is transmission connection with corresponding friction wheel, for gathering the rotation parameter of corresponding friction wheel and converting it into rotary gantry's rotation signal.According to the rotary gantry feedback mechanism of the utility model embodiment, the rotation parameter of corresponding friction wheel is directly obtained by multiple encoders, the rotation signal of rotary gantry can be indirectly obtained, the reliability of transmission feedback is effectively guaranteed, different control requirements can be realized, rotary gantry feedback mechanism structure is simple, easy to customize, and cost ratio is low.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment technology, specifically relating to a rotating frame feedback mechanism and a medical device having the same. Background Technology

[0002] Medical linear accelerators are advanced biomedical devices that use particle acceleration technology to generate high-energy rays to irradiate tumor tissue, thereby killing tumor cells. The accuracy of angle control during gantry rotation is crucial to the device's diagnostic and therapeutic performance. Traditional gantry rotation feedback methods in medical linear accelerators include: grating feedback, magnetic grating feedback, pinion gear feedback, and sprocket feedback. These methods all require specialized components within the device. On the one hand, the cost of feedback components is high; on the other hand, to meet the application requirements of these feedback methods, the relevant structural features of the gantry need to be custom-designed, thus significantly limiting the device's structural iteration. For example, grating and magnetic grating feedback require expensive grating rulers (magnetic rulers) and reading heads, and it is difficult to achieve full-rotation feedback. Similarly, pinion gear feedback requires custom-made toothed bearings for the gantry, which are more expensive, and sprocket feedback requires custom-made large sprockets installed on the gantry, resulting in high manufacturing costs. Furthermore, the use of custom structures in pinion gear and sprocket feedback poses challenges to subsequent structural iteration design. Summary of the Invention

[0003] The purpose of this utility model embodiment is to provide a rotating gantry feedback mechanism and a medical device having the same, so as to solve the problems of high cost, low feedback accuracy and difficulty in iterative design of the rotation feedback method of the existing rotating gantry.

[0004] The first aspect of this utility model provides a rotating frame feedback mechanism.

[0005] The second aspect of this utility model provides a medical device.

[0006] According to a first aspect embodiment of the present invention, a rotating frame feedback mechanism is used to output a rotation signal of a rotating frame on a base, the rotating frame feedback mechanism comprising: Mounting components are fixed to the base; Multiple friction wheels are rotatably mounted on the mounting assembly. The friction wheels are configured to abut against the rotating frame by adjusting the mounting assembly, such that the rotating frame rotates synchronously with the friction wheels. Multiple encoders are mounted on the mounting assembly and are connected to the corresponding friction wheel via a drive mechanism. These encoders are used to collect the rotation parameters of the corresponding friction wheel and convert them into rotation signals for the rotating frame.

[0007] Furthermore, the friction wheel and the encoder each include two, and one friction wheel and its corresponding encoder constitute a group, with the two groups of friction wheels and their corresponding encoders symmetrically distributed along the central axis of the mounting assembly.

[0008] Furthermore, the mounting components include: A fixing bracket, which is fixed to the base; A connecting bracket, wherein a set of friction wheels and an encoder are respectively installed at both ends of the connecting bracket; An adjustment component, one end of which is fixed to a fixed bracket and the other end of which is connected to a connecting bracket, is used to adjust the position of the connecting bracket relative to the fixed bracket so that the friction wheel and the rotating frame come into contact with each other.

[0009] Furthermore, the fixed bracket has a first mounting hole at one end away from the connecting bracket, and the connecting bracket has multiple second mounting holes. The adjustment assembly includes: A stopper, wherein the stopper is provided with a plurality of third mounting holes corresponding to the second mounting holes; An adjusting rod, one end of which passes through a groove on the fixed bracket and is connected to the connecting bracket; A fastening bolt passes through a first mounting hole provided on the fixed bracket to abut against the other end of the adjusting rod, thereby locking the position of the adjusting rod. An elastic component, which connects the stop and the connecting bracket by cooperating with the second mounting hole and the third mounting hole; The stop member is configured to abut against the connecting bracket under the action of the elastic component, and the position of the connecting bracket is adjusted by adjusting the adjusting rod and tightening the fastening bolt, thereby causing the friction wheel to come into contact with the rotating frame.

[0010] Furthermore, each group of the elastic components includes: A screw, the screw comprising a head and a shaft; A spring is fitted onto the shank of the screw. The first washer is fitted onto the shank of the screw and located between the spring and the head; The second washer is fitted onto the rod portion of the screw and located between the spring and the stop member; The screw rod passes sequentially through the first washer, the spring, the second washer, the third mounting hole on the stop member, and the second mounting hole on the connecting bracket. The head is located outside the first washer. The screw rod is threadedly connected to the second mounting hole and the third mounting hole, thereby elastically tightening the connecting bracket and the stop member.

[0011] Furthermore, the side surface of the stop member facing the connecting bracket is a raised arc-shaped surface, and the side surface of the connecting bracket facing the stop member is a recessed arc-shaped surface that matches the raised arc-shaped surface.

[0012] Furthermore, the stop member is provided with a fourth mounting hole, and the adjustment assembly further includes: A connecting bolt, one end of which is fixed to the connecting bracket, and the other end passes through the fourth mounting hole to be threadedly connected to the adjusting rod.

[0013] Furthermore, the rotating frame feedback mechanism further includes: A coupling, one end of which is connected to the friction wheel and the other end of which is connected to the encoder.

[0014] Furthermore, the friction wheel includes: Two bearing mounting seats are respectively mounted on the connecting bracket; Two bearings are respectively mounted on their corresponding bearing mounting seats; The friction wheel body has two ends that are pivotally connected to the corresponding bearings, and the circumferential surface of the friction wheel body is used to abut against the rotating frame.

[0015] The medical device according to a second aspect of the present invention includes the rotating frame feedback mechanism described in the above embodiments.

[0016] According to the rotary frame feedback mechanism of this utility model embodiment, the rotation parameters of the corresponding friction wheels can be directly obtained through multiple encoders, and the rotation signal of the rotary frame can be indirectly obtained, which effectively ensures the reliability of transmission feedback and can realize different control requirements. The rotary frame feedback mechanism has a simple structure, is easy to customize, and has a low cost ratio. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the rotating frame feedback mechanism according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the adjustment assembly of the rotary frame feedback mechanism according to an embodiment of the present invention; Figure 3 for Figure 2 An exploded view; Figure 4 This is a schematic diagram of the friction wheel, coupling, and encoder of the rotary frame feedback mechanism according to an embodiment of the present invention; Figure 5 for Figure 4 An exploded view.

[0018] Figure Labels

[0019] Rotating frame feedback mechanism 100; Mounting component 10; fixing bracket 11; slide rail 111; Connecting bracket 12; adjusting assembly 13; stopper 131; adjusting rod 132; fastening bolt 133; elastic component 134; screw 1341; spring 1342; first washer 1343; second washer 1344; nut 135; connecting bolt 136; Friction wheel 20; bearing mounting base 21; bearing 22; friction wheel body 23; Encoder 30; Coupling 40; Coupling bracket 41; Base 1; Rotating frame 2. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0021] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] The following is combined with Figures 1 to 5 The rotating frame feedback mechanism 100 provided in this utility model embodiment will be described in detail through specific embodiments and application scenarios.

[0023] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0024] According to an embodiment of the present invention, the rotating frame feedback mechanism 100 is used to output the rotation signal of the rotating frame 2 on the base 1. The rotating frame feedback mechanism 100 includes a mounting assembly 10, a plurality of friction wheels 20 and a plurality of encoders 30.

[0025] Specifically, such as Figure 1 As shown, the mounting assembly 10 is fixed on the base 1, and the friction wheel 20 is rotatably mounted on the mounting assembly 10. The friction wheel 20 is configured to contact the rotating frame 2 by adjusting the mounting assembly 10, so that the rotating frame 2 drives the friction wheel 20 to rotate synchronously when it rotates. The encoder 30 is mounted on the mounting assembly 10 and is connected to the corresponding friction wheel 20 for transmission. It is used to collect the rotation parameters of the corresponding friction wheel 20 and convert them into rotation signals of the rotating frame 2.

[0026] In other words, the mounting component 10 can be installed at any position on the base 1, offering flexibility in installation location, as long as the friction wheel 20 can make contact with the rotating frame 2. Utilizing the principle of friction transmission, the friction wheel 20 is tightly pressed against the smooth surface of the bearing on the rotating frame 2. By adjusting the mounting component 10, a certain clamping force is provided to the friction wheel 20, ensuring that there is neither slippage between the friction wheel 20 and the smooth surface of the bearing on the rotating frame 2, nor any tilting relative to the bearing, thus guaranteeing the reliability of friction transmission. The friction wheel 20 rotates with the rotating frame 2. The friction wheel 20 is connected to the encoder 30. Taking advantage of the consistent linear velocity between the friction wheel 20 and the rotating frame 2, the encoder 30 converts the collected rotational parameters of the friction wheel 20 into a rotational signal for the rotating frame 2, thereby achieving signal feedback from the rotating frame 2. It should be noted that to ensure the reliability of signal feedback, multiple friction wheels 20 and encoders 30 are used. Multiple encoders 30 can mutually verify the signals, ensuring the accuracy of signal feedback, and can also send signals to different functional units to achieve different control requirements.

[0027] Therefore, the rotary frame feedback mechanism 100 according to the present invention can directly obtain the rotation signal of the corresponding friction wheel 20 through multiple encoders 30, and can indirectly obtain the rotation signal of the rotary frame 2, effectively ensuring the reliability of transmission feedback, and can realize different control requirements. The rotary frame feedback mechanism 100 has a simple structure, is easy to customize, and has a low cost ratio.

[0028] According to one embodiment of the present invention, such as Figure 1 As shown, there are two friction wheels 20 and two encoders 30. Each friction wheel 20 and its corresponding encoder 30 constitute a group. The two groups of friction wheels 20 and their corresponding encoders 30 are symmetrically distributed along the central axis of the mounting assembly 10.

[0029] In other words, this invention employs a double friction wheel 20 structure, which, together with the rotating frame 2, roughly forms a triangular structure, resulting in greater stability. Furthermore, depending on specific requirements, a structure combining multiple sets of friction wheels 20 and encoders 30 can also be used.

[0030] According to one embodiment of the present invention, such as Figure 2 As shown, the mounting assembly 10 includes a fixed bracket 11, a connecting bracket 12, and an adjustment assembly 13.

[0031] Specifically, the fixed bracket 11 is fixed on the base 1, and a set of friction wheels 20 and an encoder 30 are respectively installed at both ends of the connecting bracket 12. One end of the adjusting component 13 is fixed on the fixed bracket 11, and the other end is connected to the connecting bracket 12. It is used to adjust the position of the connecting bracket 12 relative to the fixed bracket 11 so that the friction wheels 20 and the rotating frame 2 come into contact with each other.

[0032] In other words, the fixed bracket 11 mainly serves the functions of positioning and support. The friction wheel 20 is mounted on the connecting bracket 12. The adjusting component 13 connects the connecting bracket 12 and the fixed bracket 11. The adjusting component 13 can adjust the position of the connecting bracket 12 relative to the fixed bracket 11, thereby adjusting the gap between the friction wheel 20 and the rotating frame 2, so as to achieve the contact between the friction wheel 20 and the rotating frame 2.

[0033] Furthermore, such as Figure 3 As shown, the fixed bracket 11 has a first mounting hole A at the end away from the connecting bracket 12, and the connecting bracket 12 has a plurality of second mounting holes B. The adjusting component 13 includes a stop 131, an adjusting rod 132, a fastening bolt 133 and an elastic component 134.

[0034] Specifically, the stop member 131 is provided with multiple third mounting holes C corresponding to the second mounting holes B. One end of the adjusting rod 132 passes through the slide groove 111 on the fixed bracket 11 and connects to the connecting bracket 12. The fastening bolt 133 passes through the first mounting hole A provided in the fixed bracket 11. The fastening bolt 133 abuts against the other end of the adjusting rod 132 to lock the position of the adjusting rod 132 by means of the nut 135. The elastic component 134 cooperates with the corresponding second mounting hole B and third mounting hole C to elastically tighten the stop member 131 and keep it in contact with the connecting bracket 12. The stop member 131 is configured to abut against the connecting bracket 12 under the action of the elastic component 134, and the position of the connecting bracket 12 is adjusted by adjusting the adjusting rod 132 and locking the fastening bolt 133, thereby causing the friction wheel 20 to abut against the rotating frame 2.

[0035] In other words, such as Figure 2 and Figure 3As shown, the fixed bracket 11 has a first mounting hole A, the connecting bracket 12 has four second mounting holes B, and the stop member 131 has four third mounting holes C corresponding to the four second mounting holes B. The elastic component 134 connects the second mounting holes B and the third mounting holes C, and uses its own elasticity to press the stop member 131 and the connecting bracket 12 together, thereby enabling the friction wheel 20 to reliably transmit the rotational motion of the rotating frame 2. The sliding groove 111 on the fixed bracket 11 can be a linear ball bearing structure or other forms of sliding fit structure, the main function of which is to facilitate the axial movement of the adjusting rod 132. According to the working conditions, the adjusting rod 132 is fixed in the appropriate position by rotating the fastening bolt 133 and cooperating with the nut 135, and the adjustment method is relatively simple.

[0036] According to another embodiment of the present invention, each set of elastic components 134 includes a screw 1341, a spring 1342, a first washer 1343, and a second washer 1344.

[0037] Specifically, the screw 1341 includes a head and a rod. A spring 1342 is sleeved on the rod of the screw 1341. A first washer 1343 is sleeved on the rod of the screw 1341 and located between the spring 1342 and the head. A second washer 1344 is sleeved on the rod of the screw 1341 and located between the spring 1342 and the stop member 131. The rod of the screw 1341 passes sequentially through the first washer 1343, the spring 1342, the second washer 1344, the third mounting hole C on the stop member 131, and the second mounting hole B on the connecting bracket 12. The head of the screw 1341 is located outside the first washer 1343. The screw 1341 is threadedly connected to the second mounting hole B and the third mounting hole C, thereby elastically tightening the connecting bracket 12 and the stop member 131. The screw 1341, spring 1342, first washer 1343 and second washer 1344 form a "pressing screw" structure. The elastic force of spring 1342 presses the stop 131 and the connecting bracket 12 together, thereby enabling the friction wheel 20 to come into contact with the rotating frame 2.

[0038] In one embodiment of the present invention, the side surface of the stop member 131 facing the connecting bracket 12 is a raised arc-shaped surface, and the side surface of the connecting bracket 12 facing the stop member 131 is a recessed arc-shaped surface that matches the raised arc-shaped surface.

[0039] In other words, such as Figure 3As shown, the stop member 131 and the connecting bracket 12 are arranged with a spherical contact, enabling angle self-adaptation of the component pair. This allows the force from the elastic component 134 to be evenly transmitted to the connecting bracket 12 and the friction wheel 20, ensuring that the friction wheel 20 reliably transmits the rotation signal of the rotating frame 2, preventing inaccurate transmission due to slippage, and effectively protecting the reliability of the transmission feedback. It should be noted that other connection methods between the stop member 131 and the connecting bracket 12 are also possible, as long as the friction wheel 20 can reliably adhere to the rotating frame 2; it is not limited to a spherical component pair structure.

[0040] Preferably, the stop member 131 is provided with a fourth mounting hole D, such as Figure 3 As shown, the adjustment assembly 13 also includes a connecting bolt 136, one end of which is fixed to the connecting bracket 12, and the other end passes through the fourth mounting hole D to be threadedly connected to the adjustment rod 132.

[0041] Optionally, such as Figure 4 and Figure 5 As shown, the rotating frame feedback mechanism 100 also includes a coupling 40, one end of which is connected to the friction wheel 20, and the other end is connected to the encoder 30. Specifically, as... Figure 5 As shown, one end of the encoder 30 extends out of the rotating shaft to be connected to the coupling 40, and the coupling 40 collects the rotation signal of the friction wheel 20, thereby converting the rotation parameters of the friction wheel 20 into the rotation signal of the rotating frame 2. The coupling 40 is fixed to the connecting bracket 12 by the coupling bracket 41.

[0042] According to one embodiment of the present invention, the friction wheel 20 includes two bearing mounting seats 21, two bearings 22 and a friction wheel body 23.

[0043] Specifically, two bearing mounting seats 21 are respectively mounted on the connecting bracket 12, and two bearings 22 are respectively mounted on their corresponding bearing mounting seats 21. Both ends of the friction wheel body 23 are pivotally connected to their respective bearings 22, and the circumferential surface of the friction wheel body 23 is used for mutual contact with the rotating frame 2. It should be noted that the use of bearings 22 or couplings 40 is not limited to whether the encoder 30 and the friction wheel 20 are coaxial; the only requirement is that the encoder 30 can convert the rotation parameters of the friction wheel 20 into a rotation signal for the rotating frame 2.

[0044] A second aspect of this utility model provides a medical device, such as a medical accelerator or CT scanner, including the rotating gantry feedback mechanism 100 described in the above embodiments. Since the rotating gantry feedback mechanism 100 according to this utility model has the advantages of accurate feedback and low cost, the medical device having the embodiment of this utility model also possesses the aforementioned advantages.

[0045] Other structures and technologies of the medical device according to the embodiments of this utility model are existing technologies and will not be described in detail here.

[0046] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A rotating frame feedback mechanism, wherein the rotating frame feedback mechanism is used to output a rotation signal of a rotating frame on a base, characterized in that, The rotating frame feedback mechanism includes: Mounting components are fixed to the base; Multiple friction wheels are rotatably mounted on the mounting assembly. The friction wheels are configured to abut against the rotating frame by adjusting the mounting assembly, such that the rotating frame rotates synchronously with the friction wheels. Multiple encoders are mounted on the mounting assembly and are connected to the corresponding friction wheel via a drive mechanism. These encoders are used to collect the rotation parameters of the corresponding friction wheel and convert them into rotation signals for the rotating frame.

2. The rotary frame feedback mechanism according to claim 1, characterized in that, The friction wheel and the encoder each include two, and one friction wheel and its corresponding encoder constitute a group. The two groups of friction wheels and their corresponding encoders are symmetrically distributed along the central axis of the mounting assembly.

3. The rotary frame feedback mechanism according to claim 2, characterized in that, The installation components include: A fixing bracket, which is fixed to the base; A connecting bracket, wherein a set of friction wheels and an encoder are respectively installed at both ends of the connecting bracket; An adjustment component, one end of which is fixed to a fixed bracket and the other end of which is connected to a connecting bracket, is used to adjust the position of the connecting bracket relative to the fixed bracket so that the friction wheel and the rotating frame come into contact with each other.

4. The rotary frame feedback mechanism according to claim 3, characterized in that, The fixed bracket has a first mounting hole at one end away from the connecting bracket, and the connecting bracket has multiple second mounting holes. The adjustment assembly includes: A stopper, wherein the stopper is provided with a plurality of third mounting holes corresponding to the second mounting holes; An adjusting rod, one end of which passes through a groove on the fixed bracket and is connected to the connecting bracket; A fastening bolt passes through a first mounting hole provided on the fixed bracket to abut against the other end of the adjusting rod, thereby locking the position of the adjusting rod. An elastic component, which connects the stop and the connecting bracket by cooperating with the second mounting hole and the third mounting hole; The stop member is configured to abut against the connecting bracket under the action of the elastic component, and the position of the connecting bracket is adjusted by adjusting the adjusting rod and tightening the fastening bolt, thereby causing the friction wheel to come into contact with the rotating frame.

5. The rotary frame feedback mechanism according to claim 4, characterized in that, Each group of elastic components includes: A screw, the screw comprising a head and a shaft; A spring is fitted onto the shank of the screw. The first washer is fitted onto the shank of the screw and located between the spring and the head; The second washer is fitted onto the rod portion of the screw and located between the spring and the stop member; The screw rod passes sequentially through the first washer, the spring, the second washer, the third mounting hole on the stop member, and the second mounting hole on the connecting bracket. The head is located outside the first washer. The screw rod is threadedly connected to the second mounting hole and the third mounting hole, thereby elastically tightening the connecting bracket and the stop member.

6. The rotary frame feedback mechanism according to claim 4, characterized in that, The surface of the stop member facing the connecting bracket is a raised arc-shaped surface, and the surface of the connecting bracket facing the stop member is a concave arc-shaped surface that matches the raised arc-shaped surface.

7. The rotary frame feedback mechanism according to claim 4, characterized in that, The stop member is provided with a fourth mounting hole, and the adjustment assembly further includes: A connecting bolt, one end of which is fixed to the connecting bracket, and the other end passes through the fourth mounting hole to be threadedly connected to the adjusting rod.

8. The rotary frame feedback mechanism according to claim 1, characterized in that, Also includes: A coupling, one end of which is connected to the friction wheel and the other end of which is connected to the encoder.

9. The rotary frame feedback mechanism according to claim 1, characterized in that, The friction wheel includes: Two bearing mounting seats are respectively mounted on the connecting bracket; Two bearings are respectively mounted on their corresponding bearing mounting seats; The friction wheel body has two ends that are pivotally connected to the corresponding bearings, and the circumferential surface of the friction wheel body is used to abut against the rotating frame.

10. A medical device, characterized in that, Includes the rotary frame feedback mechanism as described in any one of claims 1-9.

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