Two-dimensional rotation driving mechanism of treatment bed

Abstract

The utility model provides a two-dimensional rotation driving mechanism of a treatment couch, which is arranged under the treatment couch, fixedly connected with the treatment couch and used for driving the treatment couch to rotate transversely and longitudinally. The two-dimensional rotation driving mechanism comprises a top frame, a middle frame and a bottom frame which are stacked up and down, a transverse driving assembly used for driving the top frame and the middle frame to synchronously rotate in the transverse direction, and a longitudinal driving assembly used for driving the top frame to rotate in the longitudinal direction. By adopting the two-dimensional rotation driving mechanism and the driving method of the treatment bed, the positioning error of a patient can be reduced, and the positioning flexibility can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a two-dimensional rotation drive mechanism of a treatment bed. Background Art

[0002] The treatment couch is a crucial component of a medical linear accelerator system. Its function is to secure the patient during radiotherapy, facilitating delivery. Radiotherapy uses radiation to treat primary tumors or metastatic lesions. It requires maximizing the radiation dose to the affected area to effectively kill tumor cells while sparing surrounding healthy tissues and organs.

[0003] During radiotherapy, cancer patients need to be fixed to the treatment couch, and body positioning is adjusted by medical staff. Factors such as the couch's lack of flexibility and the staff's experience can lead to positioning errors. During radiotherapy, parts of the target volume may be outside the radiation field, while some surrounding normal tissue and organs may be within the radiation field, resulting in reduced radiotherapy efficacy and damage to surrounding normal tissue and organs. Conventional five-dimensional treatment couches can rotate horizontally or vertically, aligning the patient's target cells on the couch with the treatment center of the treatment device.

[0004] However, when a traditional five-dimensional treatment couch rotates in a two-dimensional plane (for example, the plane remaining after removing the lifting direction in three-dimensional space), its limited orbital direction leads to large positioning errors of patients who swing synchronously with the treatment couch, increasing the radiation dose deviation of radioactive substances.

[0005] Therefore, there is an urgent need for a two-dimensional rotary drive mechanism that can reduce patient positioning errors and improve the flexibility and accuracy of radiotherapy positioning. Utility Model Content

[0006] To solve the above technical problems, the present invention provides a two-dimensional rotation drive mechanism for a treatment couch. The two-dimensional rotation drive mechanism in the present invention can drive the treatment couch to rotate both horizontally and longitudinally within a two-dimensional plane, thereby enabling the patient lying on the treatment couch to move synchronously, reducing patient positioning errors and improving positioning flexibility.

[0007] The utility model provides a two-dimensional rotation drive mechanism for a treatment bed, characterized in that: the two-dimensional rotation drive mechanism is arranged directly below the treatment bed and fixedly connected to the treatment bed, and is used to drive the treatment bed to rotate in the horizontal and vertical directions. The two-dimensional rotation drive mechanism includes: a top frame, a middle frame, and a bottom frame stacked up one above the other. The upper surface of the bottom frame is provided with a horizontal drive component for driving the top frame and the middle frame to rotate synchronously in the horizontal direction, and a vertical drive component for driving the top frame to rotate in the vertical direction.

[0008] The lateral drive assembly includes an electric cylinder provided on the upper surface of the bottom frame for pushing the top frame and the middle frame to rotate synchronously in the lateral direction, one end of the electric cylinder is connected to the middle frame via a first mounting bracket, the first mounting bracket is hinged to the electric cylinder, and the first mounting bracket is fixedly connected to the middle frame; the other end of the electric cylinder is connected to the bottom frame via a second mounting bracket, the second mounting bracket is hinged to the other end of the electric cylinder, and the second mounting bracket is fixedly connected to the bottom frame; a first rotating motor is fixed on the electric cylinder;

[0009] The longitudinal drive assembly includes a pair of arc-shaped gear rings symmetrically fixedly arranged at both ends of the top frame along the longitudinal direction, a driving gear passing through one end of the middle frame along the longitudinal direction and engaged with the arc-shaped gear rings for driving the middle frame to rotate longitudinally, and a second rotating motor arranged on the middle frame and fixedly connected to the driving gear for driving the driving gear to rotate.

[0010] The above-mentioned two-dimensional rotation drive mechanism of the treatment bed is characterized in that: the lateral drive assembly further includes two pairs of first guide wheels symmetrically arranged on the middle frame at both ends of the lateral direction and fixedly connected to the middle frame, and two pairs of first guide holes symmetrically opened on the bottom frame and adapted to fit the first guide wheels.

[0011] The above-mentioned two-dimensional rotation drive mechanism of the treatment bed is characterized in that: the longitudinal drive assembly further includes two pairs of second guide wheels symmetrically arranged at both ends of the middle frame along the longitudinal direction, and two pairs of second guide holes symmetrically opened on the top frame to adapt to the second guide wheels.

[0012] The above-mentioned two-dimensional rotation drive mechanism of the treatment bed is characterized in that: the longitudinal drive assembly further includes a pair of synchronous gears symmetrically arranged at both ends of the middle frame along the longitudinal direction, the synchronous gears are fixedly connected by a connecting rod, and the synchronous gears and the connecting rod are fixedly connected by the coupling.

[0013] The beneficial effects are inferred as follows:

[0014] In the prior art, due to the limited orbiting directions of the five-dimensional treatment couch, the patient positioning error caused by the synchronous swing of the treatment couch is relatively large, thereby increasing the radiation dose deviation of the radioactive material.

[0015] In the technical solution of the present invention, first, the lateral drive assembly (including the first rotary motor and the electric cylinder) can drive the middle frame and the top frame to rotate simultaneously in a certain direction (for example, lateral). At the same time, the middle frame and the top frame can synchronously drive the treatment bed to rotate in the above direction (i.e., lateral).

[0016] Similarly, the longitudinal drive assembly (including the second rotary motor, the drive gear, and the arc-shaped ring gear) can drive the top frame to rotate in another direction (e.g., longitudinally). At the same time, the top frame can synchronously drive the treatment couch to rotate in the aforementioned direction (i.e., longitudinally).

[0017] It is precisely because of the use of the longitudinal drive component that the orbiting direction of the treatment bed in the two-dimensional plane is broadened, the patient positioning error is reduced, the radioactive dose deviation of radioactive materials is reduced, and the positioning flexibility is improved.

[0018] The above solution avoids the situation in the prior art where the traditional five-dimensional treatment couch can only rotate in one direction (for example, horizontally) within a two-dimensional plane, resulting in large positioning errors for the patient who swings synchronously with the treatment couch, thereby increasing the radiation dose deviation of the radioactive material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A two-dimensional rotation drive mechanism for a treatment bed provided by the utility model;

[0020] Figure 2 for Figure 1 Exploded diagram;

[0021] Figure 3 for Figure 1 The middle two-dimensional rotary drive mechanism rotates around the horizontal direction;

[0022] Figure 4 for Figure 2 The middle two-dimensional rotary drive mechanism rotates around the longitudinal direction;

[0023] Figure 5 It is a structural diagram of the top frame with the arc gear ring installed;

[0024] Figure 6 It is a structural diagram of the middle frame with the longitudinal rotating assembly installed;

[0025] Figure 7 Schematic diagram of the structure of the bottom frame;

[0026] Figure 8 It is a structural diagram of the bottom frame on which the electric cylinder and the first rotary motor are installed;

[0027] Figure 9The utility model provides a method for driving the treatment bed to rotate in a circumferential direction by utilizing the two-dimensional rotation drive mechanism of the treatment bed;

[0028] Description of reference numerals:

[0029] Treatment bed 1; top frame 2; middle frame 3;

[0030] Bottom frame 4; electric cylinder 5; first rotary motor 6;

[0031] First mounting support 7; second mounting support 8; arc-shaped gear ring 9;

[0032] Driving gear 10; second rotating motor 11; first guide wheel 12;

[0033] First guide hole 13; second guide wheel 14; second guide hole 15;

[0034] Synchronous gear 16; connecting rod 17; coupling 18. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant utility model and are not intended to limit the scope of the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention, namely, the features of the embodiments, can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] In the prior art, due to the limited orbiting directions of the five-dimensional treatment couch, the patient positioning error caused by the synchronous swing of the treatment couch is relatively large, thereby increasing the radiation dose deviation of the radioactive material.

[0038] Based on this, an embodiment of the present invention provides a two-dimensional rotation drive mechanism and drive method for a treatment couch, which can reduce patient positioning errors and reduce the deviation of the radioactive dose of radioactive substances.

[0039] Figure 1 The utility model provides a two-dimensional rotation drive mechanism for a treatment bed. Figure 2 for Figure 1 Exploded diagram, Figure 3 for Figure 1 The two-dimensional rotary drive mechanism rotates around the horizontal direction. Figure 4 for Figure 2 The two-dimensional rotary drive mechanism rotates around the longitudinal direction. Figure 5 This is a schematic diagram of the structure of the top frame with the arc gear ring installed. Figure 6This is a schematic diagram of the structure of the middle frame with the longitudinal rotating assembly installed.

[0040] Figure 7 It is a structural diagram of the bottom frame. Figure 8 It is a structural diagram of the bottom frame on which the electric cylinder and the first rotating motor are installed.

[0041] Combine Figures 1 to 2 The utility model provides a two-dimensional rotation drive mechanism for a treatment bed. The two-dimensional rotation drive mechanism is arranged directly below the treatment bed 1 and is fixedly connected to the treatment bed 1. It is used to drive the treatment bed 1 to rotate horizontally and vertically. The two-dimensional rotation drive mechanism includes:

[0042] The top frame 2, the middle frame 3 and the bottom frame 4 are stacked up, and the upper surface of the bottom frame 4 is provided with a transverse driving component for driving the top frame 2 and the middle frame 3 to rotate synchronously in the transverse direction, and a longitudinal driving component for driving the top frame 2 to rotate in the longitudinal direction;

[0043] The lateral drive assembly includes an electric cylinder 5 provided on the upper surface of the bottom frame 4 for driving the top frame 2 and the middle frame 3 to rotate synchronously in the lateral direction. One end of the electric cylinder 5 is connected to the middle frame 3 via a first mounting bracket 7. The first mounting bracket 7 is hinged to the electric cylinder 5. The first mounting bracket 7 is fixedly connected to the middle frame 3. The other end of the electric cylinder 5 is connected to the bottom frame 4 via a second mounting bracket 8. The second mounting bracket 8 is hinged to the electric cylinder 5. The second mounting bracket 8 is fixedly connected to the bottom frame 4. A first rotating motor (6) is fixed on the electric cylinder (5).

[0044] The longitudinal drive assembly includes a pair of arc-shaped gear rings 9 symmetrically fixed at both ends of the top frame 2 along the longitudinal direction, a driving gear 10 passing through one end of the middle frame 3 along the longitudinal direction and meshing with the arc-shaped gear rings 9 for driving the middle frame 3 to rotate longitudinally, and a second rotating motor 11 arranged on the middle frame 4 and fixedly connected to the driving gear 10 for driving the driving gear 10 to rotate.

[0045] It should be noted that, for purposes of illustration, the horizontal direction in the embodiments of the present invention and the accompanying drawings is the x-axis in a rectangular coordinate system, and the vertical direction is the y-axis in a rectangular coordinate system. In other possible cases, the horizontal direction may be the y-axis, and the vertical direction may be the x-axis, respectively. Alternatively, the horizontal and vertical directions may be different coordinate axes in a rectangular coordinate system.

[0046] For specific implementation, see Figure 9On the one hand, the first rotary motor 6 drives the electric cylinder 5 to extend and retract, synchronously pushing the middle frame 3 and the top frame 2 (the above two frames are not shown here) to rotate around the horizontal direction (for example, the x-axis). It should be noted that at this time, the middle frame 3 and the top frame 2 are relatively stationary, which is analogous to when a ship glides on the water, and the people or cargo on the ship are stationary relative to the ship.

[0047] At the same time, combined Figure 1 Since the two-dimensional rotation drive mechanism is fixedly connected to the treatment bed 1 above it, the middle frame 3 and the top frame 2 can synchronously drive the treatment bed 1 to rotate around the horizontal direction (for example, the x-axis).

[0048] On the other hand, see Figure 6 , the second rotary motor 11 drives the top frame 2 (not shown here) to rotate about the longitudinal direction (eg, the y-axis). Figure 5 The second rotary motor 11 can drive the gear 10 to rotate. Since the gear is engaged with the arc-shaped ring gear 9, the gear can drive the top frame 2 to rotate longitudinally (for example, the y-axis) with the help of the arc-shaped ring gear 9.

[0049] At the same time, combined Figure 1 , the top frame 2 can synchronously drive the treatment bed 1 to rotate longitudinally (for example, the y-axis).

[0050] It should be noted that the transverse drive assembly and the longitudinal drive assembly in the above-mentioned two-dimensional rotation drive mechanism are independent of each other. That is, the transverse drive assembly and the longitudinal drive assembly can move independently or in conjunction, that is, the treatment bed 1 can be rotated both transversely and longitudinally at the same time.

[0051] The beneficial effects are inferred as follows:

[0052] In the prior art, due to the limited orbiting directions of the five-dimensional treatment couch, the patient positioning error caused by the synchronous swing of the treatment couch is relatively large, thereby increasing the radiation dose deviation of the radioactive material.

[0053] In the technical solution of the present invention, first, the lateral drive assembly (including the first rotary motor and the electric cylinder) can drive the middle frame and the top frame to rotate simultaneously in a certain direction (for example, lateral). At the same time, the middle frame and the top frame can synchronously drive the treatment bed to rotate in the above direction (i.e., lateral).

[0054] Similarly, the longitudinal drive assembly (including the second rotary motor, the drive gear, and the arc-shaped ring gear) can drive the top frame to rotate in another direction (e.g., longitudinally). At the same time, the top frame can synchronously drive the treatment couch to rotate in the aforementioned direction (i.e., longitudinally).

[0055] It is precisely because of the use of the longitudinal drive component that the orbiting direction of the treatment bed in the two-dimensional plane is broadened, the patient positioning error is reduced, and the radioactive dose deviation of radioactive materials is reduced.

[0056] The above solution avoids the problem that the traditional five-dimensional treatment couch in the prior art can only rotate in one direction (for example, horizontally) within a two-dimensional plane, resulting in large positioning errors for the patient who swings synchronously with the treatment couch, thereby increasing the radiation dose deviation of the radioactive material.

[0057] The above-described embodiment introduces a two-dimensional rotation drive mechanism for the treatment couch 1. In another embodiment of the present invention, it is described how to ensure that the treatment couch 1 does not deviate laterally while rotating laterally, that is, how to ensure that the treatment couch 1 can rotate accurately laterally.

[0058] See also Figure 3 The transverse drive assembly also includes two pairs of first guide wheels 12 symmetrically arranged at the longitudinal ends of the middle frame 3 and fixedly connected to the middle frame 3, and two pairs of first guide holes 13 symmetrically opened on the bottom frame 4 and adapted to the first guide wheels 12.

[0059] Continue to see Figure 3 In a specific implementation, when the first rotary motor 6 drives the middle frame 3 and the top frame 2 to rotate laterally, the first guide wheel 12 on the middle frame 3 can slide in the first guide hole 13 opened on the bottom frame 4, so that the middle frame 3 and the top frame 2 do not shift laterally while rotating laterally, that is, the middle frame 3 and the top frame 2 can accurately rotate laterally.

[0060] Since the two-dimensional rotation drive mechanism (including the middle frame 3 and the top frame 2) is fixedly connected to the treatment couch 1, when the middle frame 3 and the top frame 2 accurately rotate in the lateral direction, the treatment couch 1 can also accurately rotate in the lateral direction, that is, the treatment couch 1 does not deviate in the lateral direction while rotating in the lateral direction.

[0061] The aforementioned embodiment describes how to prevent the treatment couch 1 from deflecting in the lateral direction while rotating in the lateral direction, that is, how to accurately rotate the treatment couch 1 in the lateral direction. Another embodiment of the present invention describes how to prevent the treatment couch 1 from deflecting in the longitudinal direction while rotating in the longitudinal direction, that is, how to accurately rotate the treatment couch 1 in the longitudinal direction.

[0062] See also Figure 4 The longitudinal assembly also includes two pairs of second guide wheels 14 symmetrically arranged at both ends of the middle frame 3 along the longitudinal direction, and two pairs of second guide holes 15 symmetrically opened on the top frame 2 and adapted to the second guide wheels 14.

[0063] Continue to see Figure 4In a specific implementation, when the second rotating motor 11 drives the top frame 2 to rotate longitudinally, the second guide wheel 14 on the middle frame 3 can slide in the second guide hole 15 opened on the top frame 2, so that the top frame 2 does not deviate along the longitudinal direction while rotating longitudinally, that is, the top frame 2 can accurately rotate longitudinally.

[0064] It should be noted that, compared with the middle frame 3 and the top frame 2 mentioned above that rotate horizontally, the top frame 2 here rotates longitudinally, and the reason why the middle frame 3 does not rotate longitudinally is that the middle frame 3 has no driving power for longitudinal rotation.

[0065] Because the two-dimensional rotation drive mechanism (including the top frame 2) is fixedly connected to the treatment bed 1, when the top frame 2 rotates accurately in the longitudinal direction, the treatment bed 1 can also rotate accurately in the longitudinal direction. That is, the treatment bed 1 does not deviate in the longitudinal direction while rotating in the longitudinal direction.

[0066] The aforementioned embodiment describes how to prevent the treatment couch 1 from deflecting in the longitudinal direction while rotating in the longitudinal direction, that is, how to accurately rotate the treatment couch 1 in the longitudinal direction. Another embodiment of the present invention describes how to synchronize the longitudinal rotation of the treatment couch 1 at both ends.

[0067] See also Figure 6 The longitudinal drive assembly also includes a pair of synchronous gears 16 symmetrically arranged at both ends of the middle frame 3 along the longitudinal direction. The synchronous gears 16 are fixedly connected by a connecting rod 17, and the synchronous gears 16 and the connecting rod 17 are fixedly connected by a coupling 18.

[0068] Combine Figure 5 In a specific implementation, when the second rotary motor 11 drives the top frame 2 to rotate longitudinally, since the arc-shaped ring gear 9 (disposed at both ends of the top frame 2 along the longitudinal direction) and the synchronous gear 16 (disposed at both ends of the middle frame 3 along the longitudinal direction) are engaged, the two synchronous gears 16 disposed on the middle frame 3 along the longitudinal direction can rotate longitudinally at the same speed.

[0069] Because the synchronous gear 16 ensures that the top frame 2 rotates at the same speed at both ends in the longitudinal direction, and because the two-dimensional rotation drive mechanism (including the synchronous gear 16) is fixedly connected to the treatment bed 1, the treatment bed 1 rotates at the same speed at both ends in the longitudinal direction, thus ensuring that the treatment bed 1 rotates synchronously in the longitudinal direction at both ends.

[0070] The above-described embodiment describes how to enable the treatment couch 1 to rotate longitudinally at both ends in a synchronous manner. In another embodiment of the present invention, detailed steps are described for utilizing a two-dimensional rotation drive mechanism to drive the treatment couch 1 to rotate transversely and longitudinally.

[0071] Figure 9 The present invention provides a method for driving a treatment bed 1 to rotate in a circumferential direction using a two-dimensional rotation drive mechanism of the treatment bed. The method comprises the following steps:

[0072] Step 901: The lateral drive assembly in the two-dimensional rotation drive mechanism drives the top frame 2 and the middle frame 3 to rotate synchronously in the lateral direction. Simultaneously, the treatment bed 1 fixedly connected to the two-dimensional rotation drive mechanism rotates in the lateral direction.

[0073] Step 902: The longitudinal drive assembly in the two-dimensional rotation drive mechanism drives the top frame 2 to rotate longitudinally. Simultaneously, the treatment bed 1 fixedly connected to the two-dimensional rotation drive mechanism rotates longitudinally.

[0074] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A two-dimensional rotation drive mechanism for a treatment bed, characterized by: The two-dimensional rotation drive mechanism is arranged directly below the treatment bed (1) and is fixedly connected to the treatment bed (1) and is used to drive the treatment bed (1) to rotate in the horizontal and vertical directions. The two-dimensional rotation drive mechanism includes: A top frame (2), a middle frame (3) and a bottom frame (4) are stacked up and down, and the upper surface of the bottom frame (4) is provided with a transverse driving component for driving the top frame (2) and the middle frame (3) to rotate synchronously in the transverse direction, and a longitudinal driving component for driving the top frame (2) to rotate in the longitudinal direction; The lateral drive assembly includes an electric cylinder (5) arranged on the upper surface of the bottom frame (4) for driving the top frame (2) and the middle frame (3) to rotate synchronously around the lateral direction; one end of the electric cylinder (5) is connected to the middle frame (3) through a first mounting bracket (7), the first mounting bracket (7) is hinged to the electric cylinder (5), and the first mounting bracket (7) is fixedly connected to the middle frame (3); the other end of the electric cylinder (5) is connected to the bottom frame (4) through a second mounting bracket (8), the second mounting bracket (8) is hinged to the other end of the electric cylinder (5), and the second mounting bracket (8) is fixedly connected to the bottom frame (4); a first rotating motor (6) is fixed on the electric cylinder (5); The longitudinal drive assembly comprises a pair of arcuate gear rings (9) symmetrically fixedly arranged at both ends of the top frame (2) along the longitudinal direction, a driving gear (10) passing through one end of the middle frame (3) along the longitudinal direction and meshing with the arcuate gear rings (9) for driving the middle frame (3) to rotate longitudinally, and a second rotating motor (11) arranged on the middle frame (3) and fixedly connected to the driving gear (10) for driving the driving gear (10) to rotate.

2. The two-dimensional rotation drive mechanism of a treatment couch according to claim 1, characterized in that: The transverse drive assembly further comprises two pairs of first guide wheels (12) symmetrically arranged on the middle frame (3) along the two transverse ends and fixedly connected to the middle frame (3), and two pairs of first guide holes (13) symmetrically opened on the bottom frame (4) and adapted to the first guide wheels (12).

3. The two-dimensional rotation drive mechanism of a treatment couch according to claim 1, characterized in that: The longitudinal drive assembly further comprises two pairs of second guide wheels (14) symmetrically arranged at both ends of the middle frame (3) along the longitudinal direction, and two pairs of second guide holes (15) symmetrically opened on the top frame (2) and adapted to the second guide wheels (14).

4. The two-dimensional rotation drive mechanism of a treatment couch according to claim 3, characterized in that: The longitudinal drive assembly further comprises a pair of synchronous gears (16) symmetrically arranged at both ends of the middle frame (3) along the longitudinal direction, the synchronous gears (16) being fixedly connected via a connecting rod (17), and the synchronous gears (16) and the connecting rod (17) being fixedly connected via a coupling (18).

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