阅读说明：本技术 一种医用加速器治疗床用公转机构 (Revolution mechanism for medical accelerator treatment bed ) 是由 刘虎祯 俞力峰 吴建兴 申振 姚兴安 王春波 王小军 于 2018-12-25 设计创作，主要内容包括：本发明公开了一种医用加速器治疗床用公转机构,属于医疗器械技术领域。该公转机构包括轨道基座、悬臂基座、摩擦轮、刹车减速电机和滑动轴；轨道基座固定在地面基础内部,轨道基座为圆盘形结构,圆盘形边缘具有圆形轨道,圆盘形的中心位置具有中心定位孔；悬臂基座的一端通过滑动轴安装在轨道基座的中心定位孔中；悬臂基座的一端通过摩擦轮和滚针轴承支撑在轨道基座的圆形轨道上,滚针轴承安装在悬臂基座的底部,摩擦轮受固定安装在轨道基座上的刹车减速电机驱动,悬臂基座受摩擦轮产生的摩擦力绕轨道基座中心定位孔的中心轴线转动。本发明能够使治疗床的公转机构安装方便,运行平稳,降低加工成本。(The invention discloses a revolution mechanism for a medical accelerator treatment bed, and belongs to the technical field of medical instruments. The revolution mechanism comprises a track base, a cantilever base, a friction wheel, a brake speed reducing motor and a sliding shaft; the track base is fixed inside the ground foundation and is of a disc-shaped structure, a circular track is arranged at the edge of the disc shape, and a central positioning hole is formed in the central position of the disc shape; one end of the cantilever base is arranged in a central positioning hole of the track base through a sliding shaft; one end of the cantilever base is supported on a circular track of the track base through a friction wheel and a needle bearing, the needle bearing is installed at the bottom of the cantilever base, the friction wheel is driven by a brake speed reducing motor fixedly installed on the track base, and the cantilever base rotates around the central axis of a central positioning hole of the track base under the friction force generated by the friction wheel. The invention can ensure that the revolution mechanism of the treatment bed is convenient to install and stable to operate, and reduces the processing cost.)

1. A revolution mechanism for a medical accelerator treatment bed is characterized by comprising an orbit base, a cantilever base, a friction wheel, a brake speed reduction motor, a sliding copper sleeve and a sliding shaft;

the track base is fixed inside the ground foundation and is of a disc-shaped structure, a circular track is arranged at the edge of the disc shape, and a central positioning hole is formed in the central position of the disc shape;

one end of the cantilever base is arranged in a central positioning hole of the track base through a sliding shaft, the cantilever base is fixedly connected with the sliding shaft and then forms a revolute pair with the central positioning hole, and the sliding copper sleeve is arranged on a rotating matching surface; one end of the cantilever base is supported on a circular track of the track base through a friction wheel and a needle bearing, the needle bearing is installed at the bottom of the cantilever base, the friction wheel is driven by a brake speed reducing motor fixedly installed on the track base, and the cantilever base rotates around the central axis of a central positioning hole of the track base under the friction force generated by the friction wheel.

2. The revolution mechanism of a medical accelerator treatment bed as claimed in claim 1, wherein the bottom of the sliding shaft is provided with a gear, and the gear cooperates with the potentiometer to feed back the angular position of the revolution base of the treatment bed.

3. The revolution mechanism for a medical accelerator treatment couch according to claim 1 or 2, wherein the orbital base comprises a circular base and a base body; the circular base is fixed inside a foundation on the ground, the base body is preliminarily positioned by matching with a positioning surface on the circular base, a central positioning hole and a circular track are integrally machined on the base body, the central positioning hole is used as a rotary centering hole of the treatment bed to play a role in positioning the center of the bed body of the treatment bed and limiting the bed body in the vertical direction, the circular track is positioned at the edge of the base body, and the circular track provides support for the treatment bed base; the base body realizes the adjustment of the levelness of the circular track and the fixation with the circular base through a plurality of groups of adjusting holes.

4. The revolution mechanism for a medical accelerator treatment bed as claimed in claim 3, wherein the number of the adjustment holes is not less than three, each adjustment hole comprises a through hole and two threaded holes, the middle hole is a through hole corresponding to the threaded hole on the circular base, the base body and the circular base are fixed by screws, and the threaded holes on both sides of the through hole finely adjust the flatness of the circular orbit by adjusting the pin screws installed in the threaded holes; because the adjusting hole is positioned at the outermost edge of the circular track base, the diameter is larger, and the levelness adjusting precision is relatively higher.

5. The revolution mechanism of a medical accelerator treatment bed as claimed in claim 4, wherein the positioning surface of the circular base is located on a supporting bottom surface of the circular base extending in the horizontal direction towards the center of the circle, a lower concave circular groove matched with the mounting surface of the base body is machined on the upper surface of the supporting bottom surface, and the plane of the lower concave circular groove is the positioning surface; the center point of the lower concave circular groove coincides with the center point of the circular base, and the lower concave circular groove is provided with a plurality of uniformly distributed threaded holes for fixing the base body on the circular base.

6. The revolution mechanism for a medical accelerator treatment bed as claimed in claim 5, wherein a circle of horizontal baffle is arranged at the outer edge of the circular base for increasing the structural rigidity of the base and isolating the concrete filled in the pit.

Technical Field

The invention relates to a rotating mechanism, in particular to a revolution transmission mechanism suitable for a linear accelerator treatment couch, and belongs to the technical field of medical instruments.

Background

The treatment bed is used as a main auxiliary device of the linear accelerator, and the function of the treatment bed is to meet the requirements of positioning and light transmission of the linear accelerator in the treatment process of a patient. The positioning requires the therapeutic bed to have the functions of rotation and front-back extension, the extension is realized by a linkage mechanism connected with the bed plate, and the rotation is realized by the revolution of the therapeutic bed. The light transmittance is required to be good for the bed plate, and the whole structure of the treatment bed is required to avoid the area where the accelerator rays are located except for the bed plate, so that the whole form of the treatment bed adopts a revolution cantilever type structure.

The original revolution form of the treatment bed adopts a rotary support, the structural form of the rotary support is easy to incline, the processing cost is high, and the adjustment is difficult.

Disclosure of Invention

In view of this, the invention provides a revolution mechanism for a medical accelerator treatment bed, which can facilitate the installation of the revolution mechanism of the treatment bed, stabilize the operation and reduce the processing cost.

A revolution mechanism for a medical accelerator treatment bed comprises an orbit base, a cantilever base, a friction wheel, a brake speed reduction motor, a sliding copper sleeve and a sliding shaft;

the track base is fixed inside the ground foundation and is of a disc-shaped structure, a circular track is arranged at the edge of the disc shape, and a central positioning hole is formed in the central position of the disc shape;

one end of the cantilever base is arranged in a central positioning hole of the track base through a sliding shaft, the cantilever base is fixedly connected with the sliding shaft and then forms a revolute pair with the central positioning hole, and the sliding copper sleeve is arranged on a rotating matching surface; one end of the cantilever base is supported on a circular track of the track base through a friction wheel and a needle bearing, the needle bearing is installed at the bottom of the cantilever base, the friction wheel is driven by a brake speed reducing motor fixedly installed on the track base, and the cantilever base rotates around the central axis of a central positioning hole of the track base under the friction force generated by the friction wheel.

Furthermore, a gear is installed at the bottom of the sliding shaft, and the gear and the potentiometer are matched to feed back the angle position of the revolution base of the treatment couch.

Further, the rail base comprises a circular base and a base body; the circular base is fixed inside a foundation on the ground, the base body is preliminarily positioned by matching with a positioning surface on the circular base, a central positioning hole and a circular track are integrally machined on the base body, the central positioning hole is used as a rotary centering hole of the treatment bed to play a role in positioning the center of the bed body of the treatment bed and limiting the bed body in the vertical direction, the circular track is positioned at the edge of the base body, and the circular track provides support for the treatment bed base; the base body realizes the adjustment of the levelness of the circular track and the fixation with the circular base through a plurality of groups of adjusting holes.

Furthermore, the number of the adjusting holes is not less than three, each group of adjusting holes comprises a through hole and two threaded holes, the middle hole is a through hole corresponding to the threaded holes in the circular base, the base body and the circular base are fixed through screws, and the threaded holes on the two sides of the through holes finely adjust the flatness of the circular track through adjusting pin screws arranged in the threaded holes; because the adjusting hole is positioned at the outermost edge of the circular track base, the diameter is larger, and the levelness adjusting precision is relatively higher.

Furthermore, the positioning surface on the circular base is positioned on a supporting bottom surface of the circular base, which extends to the direction of the circle center along the horizontal direction, a lower concave circular groove matched with the mounting surface of the base body is processed on the upper surface of the supporting bottom surface, and the plane of the lower concave circular groove is the positioning surface; the center point of the lower concave circular groove coincides with the center point of the circular base, and the lower concave circular groove is provided with a plurality of uniformly distributed threaded holes for fixing the base body on the circular base.

Furthermore, a circle of horizontal baffle is arranged at the outer edge of the round base and used for increasing the structural rigidity of the base and isolating the concrete filling the pit.

Has the advantages that:

1. the cantilever base rotates on the track base by utilizing the friction force generated by the friction wheel and the lower part of the cantilever base, and the friction wheel is used as a driving part and simultaneously plays a role in supporting the cantilever base, so that the whole cantilever-type treatment bed runs stably, and the problems that the original rotary support type rotary mechanism is easy to incline and high in use cost are solved.

2. The revolution mechanism of the invention ensures that the angular speed of the treatment couch is low when the treatment couch rotates, the rotating joints of the cantilever base and the track base are matched by adopting the sliding bearing, and the rotating angle of the treatment couch is positioned by the potentiometer and the gear, thus having the advantage of accurate positioning.

3. The base body and the circular base in the track base are of an integrated structure, so that the integral rigidity of the base is improved; all matching surfaces and track surfaces are processed under a standard by the base body, the track surface has good planeness and high processing precision, and the high-precision operation requirement of the medical accelerator treatment bed can be met.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a schematic structural diagram of a track base according to the present invention;

FIG. 5 is an enlarged view of a portion of the track base of the present invention;

fig. 6 is a top view of fig. 4.

The device comprises a circular base 1, a base 2, a cantilever base 3, a friction wheel 4, a brake speed reducing motor 5, a sliding copper sleeve 6, a potentiometer 7, a gear 8, a sliding shaft 9, a center positioning hole 10, a circular track 11, a circular groove 12, a mounting surface 13, concrete 14, a through hole 15 and a threaded hole 16.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

As shown in attached figures 1, 2 and 3, the invention provides a revolution mechanism for a medical accelerator treatment bed, which comprises a circular base 1, a base body 2, a cantilever base 3, a friction wheel 4, a brake speed-reducing motor 5, a sliding copper sleeve 6, a sliding shaft 9, a potentiometer 7 and a gear 8;

the round base 1 is fixed in the ground foundation, the base body 2 is in a disc-shaped structure, a round track 11 is arranged at the edge of the disc, and a central positioning hole 10 is arranged at the central position of the disc;

one end of the cantilever base 3 is arranged in a central positioning hole 10 of the base body 2 through a sliding shaft 9, the cantilever base 3 and the sliding shaft 9 are fixedly connected and then form a revolute pair with the central positioning hole 10, and a sliding copper sleeve 6 is arranged on a rotating matching surface; one end of the cantilever base 3 is supported on a circular track 11 of the base body 2 through a friction wheel 4 and a needle bearing, the needle bearing is installed at the bottom of the cantilever base 3, the friction wheel 4 is driven by a brake speed reducing motor 5 fixedly installed on the base body 2, and the cantilever base 3 rotates around the central axis of a central positioning hole 10 of the base body 2 under the friction force generated by the friction wheel 4; the bottom of the sliding shaft 9 is provided with a gear 8 which is matched with a potentiometer to feed back the angular position of the revolution base of the treatment couch.

As shown in fig. 4 and 5, the circular base 1 is a circular ring steel base, and is positioned and embedded in a preset pit through a tool. The bottom surface of the pit needs to be ensured to be basically horizontal, and the depth of the pit is consistent with the height of the circular base 1, so that the central line of the installed circular base is basically overlapped with a perpendicular line passing through the isocenter of the accelerator. After the circular base 1 is installed, pit gaps around the base are filled with concrete 14, the bottom surface of the circular base 1 is provided with a circular groove 12 matched with an installation surface 13 at the bottom of the base body 2, the center point of the circular groove 12 is overlapped with the center point of the circular base 1, and as long as the base body 2 is installed in the circular groove 12, the center point of the base body 2 is positioned without additional adjustment. The circular groove 12 is provided with a plurality of uniformly distributed threaded holes for fixing the base body 2 on the circular base 1;

the base body 2 is a horizontally-placed pot cover-shaped cast steel disc and has the advantages of good structural rigidity and stable installation contact surface; the central positioning hole 10, the circular rail 11, the mounting surface 13 and the adjusting hole are integrally machined on the base body 2, and the concentricity of the central positioning hole 10 and the mounting surface 13 and the verticality of the circular rail 11 are ensured.

The center positioning hole 10 is arranged at the center of the base body 2, namely the top of the pot cover, the edge of the base body 2 is matched with the circular groove 12 of the circular base 1, the functions of center positioning and supporting the structural weight of the treatment bed body are achieved, and a space is provided for installing cables and controlling components in a cavity at the bottom of the base body 2.

The center positioning hole 10 serves as a center positioning hole for rotation of the cantilever base 3 of the accelerator treatment bed, the center positioning function and the vertical limiting function of the cantilever base 3 are achieved, and the finish machining surfaces at the upper end and the lower end of the center positioning hole 10 can serve as reference datum surfaces for adjusting the levelness of the track base.

The circular track 11 is arranged at the outer edge of the base body 2 and is formed by finish machining on the basis of flanging the edge of the base body 2, and the track surface has high flatness and parallelism relative to the mounting surface 13.

The mounting surface 13 is a finish machining surface of the base body 2 matched with the circular base 1 for positioning and fixing.

As shown in fig. 6, a plurality of groups of adjusting holes are uniformly distributed on the edge (at least 3 groups) of the base body 2, wherein three adjusting holes are in one group, the middle hole is a through hole 15 and corresponds to a threaded hole on the circular base 1, and the base body 2 is fixed on the circular base 1 through a screw. Two sides of the through hole 15 are respectively provided with a threaded hole 16, the flatness of the circular track 11 is finely adjusted by adjusting pin screws arranged in the threaded holes 16, and the adjusting holes are positioned at the outermost edge of the base body 2, so that the diameter is larger, and the levelness adjusting precision is relatively higher.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.