CN105771100A - Lead block telescopic combined mechanism for medical accelerator - Google Patents
Lead block telescopic combined mechanism for medical accelerator Download PDFInfo
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- CN105771100A CN105771100A CN201410812525.5A CN201410812525A CN105771100A CN 105771100 A CN105771100 A CN 105771100A CN 201410812525 A CN201410812525 A CN 201410812525A CN 105771100 A CN105771100 A CN 105771100A
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- shaft
- medical accelerator
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Abstract
The invention provides a lead block telescopic combined mechanism for a medical accelerator. The lead block telescopic combined mechanism comprises a plurality of motors, a plurality of worm gear speed reducers and a transmission shaft, wherein the transmission shaft comprises a large gear shaft, a stud and a plurality of small gear shafts, the large gear shaft is a hollow shaft, the stud is located inside the large gear shaft and below a lead block of the medical accelerator, and the plurality of motors are each connected with the corresponding small gear shaft through the corresponding worm gear speed reducer; the motor outputs force moment to the small gear shafts through the worm gear speed reducers, drives the large gear shaft to rotate through the engagement of the large gear shaft and the small gear shafts, drives the stud to move upwards or downwards through the cooperation of the large gear shaft and a spline of the stud, and further drives the lead block to move upwards or downwards. The scheme of the lead block telescopic combined mechanism effectively compresses spatial size and ensures the rigidity and motion precision of the integral structure of the system through optimal combination of various kinds of transmission methods such as gear, spline and spiral transmission.
Description
Technical field
The present invention relates to physical technique field, particularly relate to the flexible combined mechanism of plumbous gear of a kind of medical accelerator.
Background technology
Medical accelerator is that the one in biomedicine for carrying out radiocurable particle accelerator device to tumor, equipment can send many grades of electric wires and X ray in running, and ray can be divided into according to constituting source: primary ray, scattered rays and treatment head sand permeation.Primary ray refers to the ray that treatment head collimator directly radiates.Scattered rays refers to that the ray that primary ray and ambient substance interact and produce, scattered rays and sand permeation radiate to surrounding.Beam energy produced by accelerator is significantly high, and therefore the protection of primary ray is particularly important, and the protection done for it can be divided into two parts, and Part I is the servo-actuated plumbous gear with treatment head correspondence position, and the second layer is therapeutic room's protecting wall.
Plumbous gear used in medical accelerator uses position to can be divided mainly into two kinds according to it, one is in order to carry out individual protection for patient's non-treated area with exterior domain, and its effect is to avoid patient, because of the radiation of scattered rays etc., its normal physiological organizational structure is produced impact；Another kind of in order to carry out region bulk shielding protection within the scope of radiotherapy head beam subtended angle, for instance the servo-actuated plumbous gear for the treatment of described above.
Wherein, the flexible combined mechanism of plumbous gear is in order to realize the lifting action of plumbous gear.If medical accelerator does not adopt the servo-actuated plumbous retaining device for the treatment of, then owing to take into full account protection dosage, therefore the thickness of therapeutic room's protecting wall can be greatly increased, and the corresponding construction cost of hospital also can increase.
From the use angle of accelerator, before the treatment starts, plumbous retaining device should be able to put in place in action, and in the rotary course for the treatment of head work, plumbous gear should keep consistent with treatment head irradiation area.The plumbous overall deadweight of gear structure itself is relatively big, is affected by accelerator integral layout, and construction profile size is limited.The requirement that the movement structure of plumbous gear should meet compact conformation, having stable behavior is reliable, acts freely.Realize from the viewpoint of mechanism action, adopt single big torque output motor to provide the usual manner of power cannot meet instructions for use；Relatively big from the viewpoint of the elevating movement stroke of the plumbous gear of impulse stroke, if adopting simple single-stage driving, then shared stroke space is excessive, then cannot meet instructions for use.
Summary of the invention
The technical problem to be solved in the present invention is to provide the flexible combined mechanism of plumbous gear of a kind of medical accelerator, adopt the optimum organization of the multiple kind of drive such as multiple motor parallel and gear, spline, spiral, realize the elevating movement between original position and operating position of the lead gear, and can compression stroke size effectively, ensure rigidity and the kinematic accuracy of overall system architecture preferably.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that
An aspect according to the embodiment of the present invention, it is provided that the flexible combined mechanism of plumbous gear of a kind of medical accelerator, including:
Multiple motors, multiple worm-gear speed reducer and power transmission shaft；
Wherein, described power transmission shaft includes: Large Gear Shaft, stud and multiple pinion shaft, and described Large Gear Shaft is hollow axle, described stud is positioned at the inside of described Large Gear Shaft, and the lower section that the lead being positioned at medical accelerator keeps off, and the plurality of motor is respectively through its corresponding worm-gear speed reducer and the connection of corresponding pinion shaft；
Moment is exported pinion shaft by worm-gear speed reducer by described motor, and by engaging each other between described Large Gear Shaft and pinion shaft, described Large Gear Shaft is driven to rotate, and by the spline fitted of described Large Gear Shaft Yu stud, drive described stud to be moved upwardly or downwardly, and then drive described plumbous gear to be moved upwardly or downwardly.
Wherein, described stud includes upper stud, lower stud and middle stud, described middle stud and upper stud are hollow stud, and the inwall of described middle stud is provided with inwardly protruded circumference boss, and the inside of the described centrally located stud of lower stud, and contact with described boss, between the centrally located stud of described upper stud and lower stud, and be positioned at the top of described boss, and the top of described upper stud is fixedly connected on the lower section of described plumbous gear.
Wherein, also include being installed on the end cap bottom described Large Gear Shaft, and the bottom of described lower stud is fixed on the bottom of described end cap.
Wherein, the outer wall of described middle stud is through external splines, and coordinate with the inwall composition involute spline of described Large Gear Shaft, the inwall of described middle stud and the inwall of boss are all stepped, respectively with the external screw thread worm drive of described upper stud and lower stud, wherein, the external screw thread of described upper stud and the externally threaded hand of helix of lower stud are contrary.
Wherein, also including: multiple guiding parts, described guiding parts includes inner guiding post, middle guide pillar and outer guiding post, and described outer guiding post is fixed with described plumbous gear base and is connected, and middle guide pillar and inner guiding post are deviate from step by step, consist of mutual locating surface and are slidably matched.
Wherein, the plurality of guiding parts is uniformly distributed in described plumbous gear lower section, and is positioned at around described power transmission shaft.
Wherein, the plurality of motor, multiple worm-gear speed reducer and power transmission shaft are respectively positioned in the lead gear casing of medical accelerator.
Wherein, the plurality of motor is uniformly distributed in around described power transmission shaft.
Wherein, the quantity of described motor, pinion shaft quantity all equal with the quantity of described worm-gear speed reducer.
The invention has the beneficial effects as follows:
In the flexible combined mechanism of plumbous gear of the medical accelerator of the present invention, motor produces power, and by worm type of reduction gearing, moment is exported pinion shaft, it is then passed through gear drive and the output torque of motor is delivered to Large Gear Shaft, the spline fitted then passing through stud and Large Gear Shaft drives stud to be moved upwardly or downwardly, and the final lead that realizes keeps off the elevating movement between original position and operating position.
The flexible combined mechanism of plumbous gear of the medical accelerator of the present invention, its output disclosure satisfy that instructions for use in use, namely can export enough axial thrusts.Calculate it can be seen that total thrust output of system is more than service load from output.Because used in parallel by multiple motors overcomes the problem that single electric machine structure is oversize, make system have certain redundancy simultaneously, substantially increase the functional reliability of whole system, enhance its non-maintaining property simultaneously, be more suitable in field of medical device popularization and application and enforcement.
Usually, lead is blocked side and is limited to the activity space shared by therapeutic bed, and downside is limited to the work space of other system unit, thus the space requirement using environment is comparatively strict.But common similar structures, such as the gib arm of crane structure that multistage hydraulic cylinder series connection uses, although may insure that the instructions for use of Long travel, but the use environmental requirement of native system cannot be met.The solution of the present invention transmits axially-movable and power by the optimum organization of the multiple kinds of drive such as gear, spline, spiral, effectively have compressed bulk, ensure that the rigidity of overall system architecture and kinematic accuracy preferably.
Accompanying drawing explanation
Fig. 1 represents the outline drawing of medical accelerator casing；
Fig. 2 represents the flexible combined mechanism primary structure figure of plumbous gear of the medical accelerator of the embodiment of the present invention；
Fig. 3 represents the generalized section in Fig. 2 along B-B direction；
Fig. 4 represents the operating position schematic diagram of the flexible combined mechanism of plumbous gear of the medical accelerator of the embodiment of the present invention；
Fig. 5 represents the generalized section along C-C direction in Fig. 3；
Fig. 6 represents the generalized section of middle stud；
Fig. 7 represents the generalized section of guiding parts；
Fig. 8 represents the composition analysis block diagram of the flexible combined mechanism of plumbous gear of the medical accelerator of the embodiment of the present invention.
Wherein in figure: 1, plumbous gear base；2, guiding parts；201, inner guiding post；202, middle guide pillar；203, outer guiding post；3, power transmission shaft；301, Large Gear Shaft；302, pinion shaft；303, stud；3031, middle stud；3032, lower stud；3033, upper stud；4, boss；5, securing member；6, plumbous gear；7, lead fixed mount；8, lead cover plate；9, end cap；10, motor；14, outer wall A；15, inwall B；16, inwall C.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing showing the exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should do not limited by embodiments set forth here.On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
An aspect according to the embodiment of the present invention, it is provided that the flexible combined mechanism of plumbous gear of a kind of medical accelerator, as in figure 2 it is shown, include:
Multiple motors 10, multiple worm-gear speed reducer and power transmission shaft 3；
Wherein, described power transmission shaft 3 includes: Large Gear Shaft 301, stud 303 and multiple pinion shaft 302, and described Large Gear Shaft 301 is hollow axle, described stud 303 is positioned at the inside of described Large Gear Shaft 301, described stud 303 is positioned at the lower section of the plumbous gear 6 of medical accelerator, and the plurality of motor 10 connects with corresponding pinion shaft 302 respectively through its corresponding worm-gear speed reducer；
Moment is exported pinion shaft 302 by worm-gear speed reducer by described motor 10, and by engaging each other between described Large Gear Shaft 301 and pinion shaft 302, described Large Gear Shaft 301 is driven to rotate, and by the spline fitted of described Large Gear Shaft 301 with stud 303, drive described stud 303 to be moved upwardly or downwardly, and then drive described plumbous gear 6 to be moved upwardly or downwardly.
With other similar structures, for instance scissors lift mechanism, Comparatively speaking, the flexible combined mechanism of plumbous gear of the medical accelerator of the embodiment of the present invention, have that cooperation is compact, unit are bears the advantages such as load is bigger, noise is little, rigidity is big.Additionally, multi-motor driving compares single motor-driven type of drive, reliability is higher and the non-maintaining property of engineering is higher, is more suitable in field of medical device popularization and application and enforcement.
Alternatively, as shown in Figure 2, described stud 303 includes upper stud 3033, lower stud 3032 and middle stud 3031, described middle stud 3031 and upper stud 3033 are hollow stud, and the inwall of described middle stud 3031 is provided with inwardly protruded circumference boss 4, and the inside of the described centrally located stud 3031 of lower stud 3032, and contact with described boss 4, between the centrally located stud 3031 of described upper stud 3033 and lower stud 3032, and be positioned at the top of described boss 4, and the top of described upper stud 3033 is fixedly connected on the lower section of described plumbous gear 6.
Alternatively, also include being installed on the end cap 9 bottom described Large Gear Shaft 301, and the bottom of described lower stud 3032 is fixed on the bottom of end cap 9.
As in figure 2 it is shown, the top of upper stud 3033 is fixedly connected on the lower section of described plumbous gear 6 by securing member 5, so when upper stud 3033 is moved upwardly or downwardly, plumbous gear 6 under the cooperation of lead fixed mount 7 and lead cover plate 8 and protection, can be moved upwardly or downwardly.
The flexible combined mechanism of plumbous gear of the medical accelerator of the embodiment of the present invention, its major function has been 6 elevating movements between original position and operating position of plumbous gear, as shown in Figure 4, bold portion is the plumbous gear 6 position when not stretching out and original position, and double dot dash line part is plumbous gear operating position when stretching out.It follows that plumbous gear 6 has needed bigger impulse stroke, and being limited to activity space shared by therapeutic bed on the upside of plumbous gear 6, downside is limited to the work space of other system unit, and therefore the use environmental requirement of plumbous gear 6 is comparatively strict.And the flexible combined mechanism of plumbous gear of the medical accelerator of the present invention, axially-movable and power is transmitted by the optimum organization of the multiple kinds of drive such as gear, spline, spiral, effectively have compressed bulk, ensure that the rigidity of overall system architecture and kinematic accuracy preferably.
Alternatively, the outer wall of described middle stud 3031 is through external splines, and coordinate with the inwall composition involute spline of described Large Gear Shaft 301, the inwall of described middle stud 3031 and the inwall of boss 4 are all stepped, respectively with the external screw thread worm drive of described upper stud 3033 and lower stud 3032, wherein, the external screw thread of described upper stud 3033 and the externally threaded hand of helix of lower stud 3032 are contrary.
As shown in Figure 3 and Figure 5, moment is exported on pinion shaft 302 by a worm-gear speed reducer by each motor 10, and pinion shaft 302 and Large Gear Shaft 301 engage each other, so the output torque of multiple motors 10 being delivered in Large Gear Shaft 301 jointly through gear drive.Large Gear Shaft 301 is hollow axle again, and as in figure 2 it is shown, this hollow axle is combined by two-stage structure series connection nesting, is spline drived and worm drive from outside to inside respectively.
Wherein, spline drived is made up of Large Gear Shaft 301 and middle stud 3031, as shown in Figure 6, the outer wall A14 of middle stud 3031 is through external splines, constitute involute spline with exterior part Large Gear Shaft 301 to coordinate, thus during Large Gear Shaft 301 rotary motion, middle stud 3031 also rotates with motion.Worm drive include the screw pair of middle stud 3031 and lower stud 3032 composition and the screw pair of middle stud 3031 and upper stud 3033 composition, as shown in Figure 6, being cooperated by trapezoidal thread between inwall C16 and the outer wall of lower stud 3032 of middle stud 3031, middle stud 3031 slides axially motion；Being cooperated by trapezoidal thread between inwall B15 and the outer wall of upper stud 3033 of middle stud 3031, upper stud 3033 slides axially motion.
In addition, the external screw thread hand of helix of upper stud 3033 and lower stud 3032 is contrary, namely the trapezoidal thread hand of helix of the inwall B15 and inwall C16 of middle stud 3031 is contrary, therefore in middle stud 3031 rotation, in the lower fixed situation of stud 3032, middle stud 3031 and upper stud 3033 can be moved upwardly or downwardly simultaneously, and the result formats of this aggregate motion achieves the motion purpose that plumbous gear 6 is flexible, and achieves deflation in version.
Alternatively, also include:
Multiple guiding parts 2, described guiding parts 2 includes inner guiding post 201, middle guide pillar 202 and outer guiding post 203, and described outer guiding post 203 is fixing with described plumbous gear base 1 is connected, middle guide pillar 202 and inner guiding post 201 are deviate from step by step, are slidably matched by mutual locating surface composition.
As shown in Figure 3 and Figure 7, guiding parts 2 completes lead is kept off support and the guiding in 6 vertical motion directions as supplementary structure.Wherein, outer guiding post 203 is fixed together by securing member 5 with plumbous gear base 1, and middle guide pillar 202 and inner guiding post 201 are deviate from step by step, are slidably matched by mutual locating surface, is finally completed the guide effect to plumbous retaining device.
Alternatively, multiple guiding parts 2 are uniformly distributed in below described plumbous gear 6, and are positioned at described power transmission shaft 3 around.As shown in Figure 3, the flexible combined mechanism of plumbous gear of the medical accelerator of the embodiment of the present invention, distribution evenly around at power transmission shaft 3 has four guiding parts 2, certainly, it is understandable that, the flexible combined mechanism of plumbous gear of the medical accelerator of the embodiment of the present invention, does not specifically limit particular number and the distributing position of guiding parts 2.
Alternatively, the plurality of motor 10, multiple worm-gear speed reducer and power transmission shaft 3 are respectively positioned in the lead gear casing of medical accelerator.Because plumbous gear 6 has needed bigger impulse stroke, and is limited to activity space shared by therapeutic bed on the upside of plumbous gear 6, downside is limited to the work space of other system unit, it is therefore desirable to keep off, at lead, the layout completing drive mechanism in casing.So, multiple motors 10, multiple worm-gear speed reducer and power transmission shaft 3 are respectively positioned in the lead gear casing of medical accelerator as shown in Figure 1.
Alternatively, the plurality of motor 10 is uniformly distributed in described power transmission shaft 3 around.
Alternatively, the quantity of described motor 10, pinion shaft 302 quantity all equal with the quantity of described worm-gear speed reducer.
The flexible combined mechanism of plumbous gear of the medical accelerator of the embodiment of the present invention, set four motors 10, certainly, it is understandable that, specifically do not limit the particular number of motor 10, but owing to each motor 10 all needs a worm-gear speed reducer that moment exports the pinion shaft 302 of correspondence, so the number of motor 10 requires equal with the quantity of the number of worm-gear speed reducer and pinion shaft 302.
Specifically, as shown in Figure 8, each motor 10 controls action simultaneously through the signal of telecommunication and produces main motion, slow down through Worm Wheel System and increase moment of torsion, again slow down after gear drive and increase output moment of torsion, torque axis is turned to axial force by the cooperation then passing through spline drived and worm drive, is changed the position of lead gear 6 by axial force.The control of position is completed by the motor message of mechanical position limitation and motor 10 at the two ends of movement travel.It also includes corresponding guiding parts 2, in order to assisted movement direction and the rigidity of structure keeping whole system.
Above-described is the preferred embodiment of the present invention; should be understood that the ordinary person for the art; can also making some improvements and modifications under without departing from principle premise of the present invention, these improvements and modifications are also in protection scope of the present invention.
Claims (9)
1. the flexible combined mechanism of plumbous gear of a medical accelerator, it is characterised in that including:
Multiple motors, multiple worm-gear speed reducer and power transmission shaft；
Wherein, described power transmission shaft includes: Large Gear Shaft, stud and multiple pinion shaft, and described Large Gear Shaft is hollow axle, described stud is positioned at the inside of described Large Gear Shaft, and the lower section that the lead being positioned at medical accelerator keeps off, and the plurality of motor is respectively through its corresponding worm-gear speed reducer and the connection of corresponding pinion shaft；
Moment is exported pinion shaft by worm-gear speed reducer by described motor, and by engaging each other between described Large Gear Shaft and pinion shaft, described Large Gear Shaft is driven to rotate, and by the spline fitted of described Large Gear Shaft Yu stud, drive described stud to be moved upwardly or downwardly, and then drive described plumbous gear to be moved upwardly or downwardly.
2. the flexible combined mechanism of plumbous gear of medical accelerator as claimed in claim 1, it is characterized in that, described stud includes upper stud, lower stud and middle stud, described middle stud and upper stud are hollow stud, and the inwall of described middle stud is provided with inwardly protruded circumference boss, and the inside of the described centrally located stud of lower stud, and contact with described boss, between the centrally located stud of described upper stud and lower stud, and be positioned at the top of described boss, and the top of described upper stud is fixedly connected on the lower section of described plumbous gear.
3. the flexible combined mechanism of plumbous gear of medical accelerator as claimed in claim 2, it is characterised in that also include being installed on the end cap bottom described Large Gear Shaft, and the bottom of described lower stud is fixed on the bottom of described end cap.
4. the flexible combined mechanism of plumbous gear of medical accelerator as claimed in claim 3, it is characterized in that, the outer wall of described middle stud is through external splines, and coordinate with the inwall composition involute spline of described Large Gear Shaft, the inwall of described middle stud and the inwall of boss are all stepped, respectively with the external screw thread worm drive of described upper stud and lower stud, wherein, the external screw thread of described upper stud and the externally threaded hand of helix of lower stud are contrary.
5. the flexible combined mechanism of plumbous gear of medical accelerator as claimed in claim 1, it is characterised in that also include:
Multiple guiding parts, described guiding parts includes inner guiding post, middle guide pillar and outer guiding post, and described outer guiding post is fixed with described plumbous gear base and is connected, and middle guide pillar and inner guiding post are deviate from step by step, consist of mutual locating surface and are slidably matched.
6. the flexible combined mechanism of plumbous gear of medical accelerator as claimed in claim 5, it is characterised in that the plurality of guiding parts is uniformly distributed in described plumbous gear lower section, and is positioned at around described power transmission shaft.
7. the flexible combined mechanism of plumbous gear of medical accelerator as claimed in claim 1, it is characterised in that the plurality of motor, multiple worm-gear speed reducer and power transmission shaft are respectively positioned in the lead gear casing of medical accelerator.
8. the flexible combined mechanism of plumbous gear of medical accelerator as claimed in claim 1, it is characterised in that the plurality of motor is uniformly distributed in around described power transmission shaft.
9. the flexible combined mechanism of plumbous gear of medical accelerator as claimed in claim 1, it is characterised in that the quantity of described motor, pinion shaft quantity all equal with the quantity of described worm-gear speed reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812525.5A CN105771100A (en) | 2014-12-22 | 2014-12-22 | Lead block telescopic combined mechanism for medical accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812525.5A CN105771100A (en) | 2014-12-22 | 2014-12-22 | Lead block telescopic combined mechanism for medical accelerator |
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| Publication Number | Publication Date |
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| CN105771100A true CN105771100A (en) | 2016-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410812525.5A Pending CN105771100A (en) | 2014-12-22 | 2014-12-22 | Lead block telescopic combined mechanism for medical accelerator |
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| CN (1) | CN105771100A (en) |
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| CN203694413U (en) * | 2014-01-06 | 2014-07-09 | 山东新华医疗器械股份有限公司 | Rotation driving assembly of electron portal imaging device |
| CN204364691U (en) * | 2014-12-22 | 2015-06-03 | 北京大基康明医疗设备有限公司 | A kind of flexible combined mechanism of lead gear of medical accelerator |
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2014
- 2014-12-22 CN CN201410812525.5A patent/CN105771100A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201061728Y (en) * | 2007-06-28 | 2008-05-21 | 无锡市华源电站除灰设备有限公司 | Main gear of high-efficiency concentrator |
| JP2010023656A (en) * | 2008-07-18 | 2010-02-04 | Jtekt Corp | Motor unit and electric power steering device |
| CN202048140U (en) * | 2011-04-18 | 2011-11-23 | 南通宇博建筑机械制造有限公司 | Transmission device for worm gear pair of basket hoister |
| CN102357799A (en) * | 2011-09-08 | 2012-02-22 | 田孝福 | Multifunctional vertical combined machining lathe |
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Application publication date: 20160720 |