CN105920747B - Accelerator therapy device - Google Patents
Accelerator therapy device Download PDFInfo
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- CN105920747B CN105920747B CN201610438056.4A CN201610438056A CN105920747B CN 105920747 B CN105920747 B CN 105920747B CN 201610438056 A CN201610438056 A CN 201610438056A CN 105920747 B CN105920747 B CN 105920747B
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- mainframe
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1077—Beam delivery systems
- A61N5/1081—Rotating beam systems with a specific mechanical construction, e.g. gantries
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
The invention discloses a kind of accelerator therapy devices, the accelerator therapy device includes treatment control device, mainframe, accelerator, the accelerator is installed on the mainframe, the treatment control device control accelerator and mainframe, the accelerator therapy device further include: mainframe adapter, bracket, pitch drive, balanced component, one mainframe adapter of setting of the invention, and mainframe and balanced component is respectively set in the two sides of mainframe adapter shaft, the equipment that balanced component is installed with mainframe and its above applies opposite torque to mainframe adapter shaft respectively, two torques are cancelled out each other or partial offset, when so that entire mainframe adapter doing pitch rotation together with mainframe, the external torque very little needed, be greatly lowered in this way external driver device manufacturing cost and The complexity of control system.
Description
Technical field
The present invention relates to accelerator therapy devices, and in particular to a kind of accelerator therapy device.
Background technique
With the development of tumour radiotherapy and material science, as a kind of important means for the treatment of cancer, radiotherapy is gradually stepped
Enter to be accurately positioned, accurate " three essences " epoch planned, accurately treated.When setting the Plane of rotation and horizontal plane of mainframe,
The Plane of rotation is X-plane, its shaft is defined as Z axis at this time, and horizontal linear that is vertical with Z axis and intersecting is X-axis, with Z axis, X
Axis is respectively perpendicular and the straight line intersected is Y-axis.Z axis and Y-axis establish Y plane, and Y-axis and X-axis establish X-plane, and Z axis and X-axis are true
Vertical horizontal plane (Z plane).Current clinac (radiotherapy equipment) is rotated by mainframe drives accelerator in X
Rotated in plane or plane in parallel, the accelerator follows mainframe to rotate, and its transmitting ray central axes with
The rotation axis of mainframe is vertical and intersects at a point, i.e. isocenter point.In general, when treatment, the lesion of sufferer is placed
At equal centers, mainframe is rotated, so that accelerator rotates on X-plane or its parallel plane around lesion, to make ray
Irradiated lesion from different directions, preferably to kill diseased cells, still, sufferer and lesion all have 3 D stereo volume,
Current therapeutic equipment is only capable of carrying out 360 ° of irradiations from a plane space, and can not achieve three-dimensional sphere space illumination.Therefore,
Newly there is a kind of so-called accelerator to nod device, mainframe is mainly hung on two by the rotary shaft being located in X-axis
On a pillar, mainframe is driven to rotate around X-axis by driving device, since mainframe and accelerator are very heavy, shaft is held
The torque received is very big, therefore the requirement to transmission device is very high.
Summary of the invention
To solve the above problems, existing the purpose of the present invention is to provide a kind of accelerator therapy device in realization accelerator
Three-dimensional operation, to reach while any direction irradiated lesion (the waiting centers) of three-dimensional space, overcomes existing on one spherical surface
The drawbacks of technology.
In order to achieve the above objectives, the technical scheme is that
A kind of accelerator therapy device, the accelerator therapy device include treatment control device, mainframe, accelerator,
The accelerator is installed on the mainframe, and the treatment control device control accelerator and mainframe, the accelerator are controlled
Treat device further include:
Mainframe adapter, the mainframe are installed on mainframe adapter, and can be around the axis of mainframe itself
Mainframe axis rotates freely；
Bracket, the mainframe adapter are rotatably installed on bracket, the adapter shaft of mainframe adapter
Axis, that is, adapter axis is vertical with mainframe axis；
Pitch drive is sequentially connected with the mainframe adapter, and drives mainframe adapter around its adapter
Axis rotation；
The accelerator follows mainframe to rotate, and the ray central axes of its transmitting and the mainframe axis are vertical simultaneously
It intersects at a point, i.e. isocenter point；The rotation of mainframe and the rotation of mainframe adapter are so that accelerator changes in three-dimensional space
Displacement is set and is always positioned on same spherical surface, and the centre of sphere of the spherical surface is overlapped with isocenter point；
Balanced component is set on mainframe adapter, and the two sides of adapter axis, host are located at mainframe
The total force of equipment that is frame and being installed on mainframe is opposite to adapter shaft application respectively with the gravity of balanced component
Torque.
In the prior art, mainframe is installed, and with driving device (usually motor and gearbox) on direct two columns
It directly drives mainframe and carries out pitch rotation, at this time during mainframe is from plumbness to horizontality tilt rotation,
The torque that itself weight is applied to driving device can be gradually increased, and very big burden be caused to driving device, therefore drive dress
It is high to set cost, control system is complicated.One mainframe adapter of setting of the invention, and turn in mainframe adapter
Mainframe and balanced component is respectively set in the two sides of axis, and balanced component and mainframe and its equipment installed above are respectively to host
Frame adapter shaft applies opposite torque, and two torques are cancelled out each other or partial offset, so that entire mainframe adapter connects
When doing pitch rotation with mainframe, the external torque very little needed, be greatly lowered in this way the manufacture of external driver device at
The complexity of this and control system.
Further, the pitch drive includes:
Motor, the driving gear being installed on ground or bracket, the motor drive driving gear rotation；
The arc-shaped rack being installed on mainframe adapter, the arc-shaped rack are engaged with driving gear, the sliding tooth
Wheel drives arc-shaped rack rotation, and arc-shaped rack drives mainframe adapter to rotate around adapter axis；In the arc-shaped rack
Point and the ray central axes for waiting the line between centers to emit with accelerator are orthogonal.
Further, the driving gear and arc-shaped rack are two groups, are respectively arranged on mainframe axis two sides, described two groups
Drive gear by same motor driven or respectively by the synchronous driving of two motors.
Further, the driving gear includes drive sprocket, driven sprocket, driving gear, the drive sprocket and electricity
Chain, belt or Toothed Belts Gearing connection, the driven sprocket is arranged in machine transmission connection between the drive sprocket and driven sprocket
Coaxially connected with driving gear, driving gear is engaged with arc-shaped rack.
Further, the balanced component further includes counterweight, drags straw line and counterweight support, and described straw line one end of dragging is connected to
On mainframe adapter, the other end is connected in counterweight, and makes balance weight hanging below counterweight support around counterweight support.
Further, the counterweight support upper end is equipped with Y shape pulley assembly, i.e., distinguishes in the end of the Liang Ge branch of Y shape
Equipped with a support pulley, the straw line of dragging is erected on support pulley.
Further, be provided with to drag on the mainframe adapter and draw arm, it is described drag draw arm setting with adapter axis
Same level height, and it is set to the side at the mainframe adapter back side, or the horizon crossing that is in U-shape is in the mainframe adapter back side
Two sides, it is described drag straw line and be connected to drag the free end for drawing arm or dragging of being in U-shape is drawn on the midpoint of arm.
Further, the frame upper is additionally provided with a support arm, and the free end of support arm is equipped with a bracket pulley, and described drag is drawn
Suo Yiduan, which is connected to drag, to be drawn on arm, then is finally connected in counterweight around on bracket pulley, support pulley in order.
Further, breaking piece, the breaking piece packet are additionally provided between the bracket and mainframe adapter
It includes:
Connecting rod, one end be connected on bracket or mainframe adapter on, the other end is equipped with the bigger piston portion of diameter；
Cylinder is damped, one end is connected on mainframe adapter or on bracket, with hollow cavity, that is, damping cavity, the work
Piston part is sheathed in damping cavity, and has air-tightness and freely slidable, and the diameter of the damping cavity of resistance damping cylinder free end is small
In piston portion, and airtight member is equipped between connecting rod, it is external logical with damping cavity that the both ends of the damping cylinder are equipped with perforation
Stomata.
Further, be equipped with electric control valve device at the venthole, the electric control valve device include electric control valve,
Sensor and controller, when sensor detects air pressure or gas flow is mutated, controller controls electric control valve and closes.
Further, eccentric moment GxL1 is at or about counteractive eccentric moment FxL2, in which:
G is comprising mainframe, mainframe adapter, accelerator and the auxiliary device installed thereon, the group of Dan Buhan counterweight
Fit center of gravity, the arm of force relative to isocenter point are L1, then eccentric moment is GxL1；
F is the active force that counterweight part generates, and the arm of force relative to isocenter is L2, and the eccentric moment generated is
FxL2。
Detailed description of the invention
Fig. 1 is schematic diagram of the invention；
Schematic diagram when Fig. 2 is mainframe and accelerator is in zero-bit；
Fig. 3 is that mainframe and accelerator are in schematic diagram when position of nodding is leaned forward；
Fig. 4 is mainframe and accelerator be in looking up position i.e. hypsokinesis position when schematic diagram；
Center of gravity generates the schematic diagram of offset when Fig. 5 is actual motion；
Number and corresponding component title represented by letter in figure:
1. accelerator；21. mainframe；22 mainframe adapters；23. arc-shaped rack；31. motor；32. driving gear；41.
Counterweight support；42. counterweight；43. dragging straw line；5. bracket；G. except the center of gravity of the moving components such as counterweight outdoor main unit frame and accelerator；
ISO. isocenter point；L1. the arm of force of the active force of the generation of the moving components such as the mainframe in addition to counterweight and accelerator；L2. match
The arm of force that recast is exerted oneself；M. pass through the vertical datum level of isocenter point.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
A kind of embodiment of the invention, as shown in Figure 1, in order to achieve the above objectives, the technical scheme is that
A kind of accelerator therapy device, the accelerator therapy device include treatment control device, mainframe 21, accelerator
1, the accelerator 1 is installed on the mainframe 21, the treatment control device control accelerator and mainframe, the acceleration
Device therapeutic device further include:
Mainframe adapter 22, the mainframe 21 are installed on mainframe adapter 22, and can be around mainframe 21 itself
Axis, that is, mainframe axis rotate freely；
Bracket 5, the mainframe adapter 22 are rotatably installed on bracket 5, the adapter of mainframe adapter 22
The axis of shaft, that is, adapter axis is vertical with mainframe axis；
Pitch drive is sequentially connected with the mainframe adapter 22, and drives mainframe adapter 22 suitable around it
So-called pitching movement is done in the rotation of orchestration axis, i.e. drive mainframe and accelerator；
The accelerator follows mainframe to rotate, and the ray central axes of its transmitting and the mainframe axis are vertical simultaneously
It intersects at a point, i.e. isocenter point；The rotation of mainframe and the rotation of mainframe adapter are so that accelerator changes in three-dimensional space
Displacement is set and is always positioned on same spherical surface, and the centre of sphere of the spherical surface is overlapped with isocenter point；To ensure the ray of accelerator transmitting
Axis pass through equal centers always.If setting the rotation axis of mainframe as the X-axis of space coordinate, the ray that accelerator emits
Axis be Y-axis.
Balanced component is set on mainframe adapter, and the two sides of adapter axis, host are located at mainframe
The total force of equipment that is frame and being installed on mainframe is opposite to adapter shaft application respectively with the gravity of balanced component
Torque.
In the prior art, mainframe is installed, and with driving device (usually motor and gearbox) on direct two columns
It directly drives mainframe and carries out pitch rotation, at this time during mainframe is from plumbness to horizontality tilt rotation,
The torque that itself weight is applied to driving device can be gradually increased, and very big burden be caused to driving device, therefore drive dress
It is high to set cost, control system is complicated.One mainframe adapter of setting of the invention, and turn in mainframe adapter
Mainframe and balanced component is respectively set in the two sides of axis, and balanced component and mainframe and its equipment installed above are respectively to host
Frame adapter shaft applies opposite torque, and two torques are cancelled out each other or partial offset, so that entire mainframe adapter connects
When doing pitch rotation with mainframe, the external torque very little needed, be greatly lowered in this way the manufacture of external driver device at
The complexity of this and control system.
In some embodiments, as shown in Figure 1, the pitch drive includes:
Motor 31 (ground is mounted in Fig. 1), the driving gear 32 being installed on ground or bracket (drive gear in Fig. 1
For a set of component, (i.e. including the gearbox, drive sprocket, the driving gear engaged with arc-shaped rack 23 that are connect with motor drive
The component of mark 32 in figure), with the coaxially connected driven sprocket of driving gear, driven sprocket and driving gear be mounted on one it is vertical
It (also may be mounted on the installation strut that bracket 5 is specially arranged) on column, passed between drive sprocket and driven sprocket by chain
Dynamic connection (being also possible to rack gear, belt etc.), the motor drives driving gear rotation, and in Fig. 1, motor is to drive gearbox
Rotation, the output of gearbox finally drive arc-shaped rack 23 through drive sprocket, chain, driven sprocket, driving gear, drive master
The rotation of rack adapter；
The arc-shaped rack 23 being installed on mainframe adapter 22, the arc-shaped rack 23 are engaged with driving gear 32, institute
Stating driving gear 32 drives arc-shaped rack 23 to rotate, and arc-shaped rack 23 drives mainframe adapter 22 to rotate around adapter axis；
The midpoint of the arc-shaped rack 23 and the ray central axes for waiting the line between centers to emit with accelerator are orthogonal.
In some embodiments, the driving gear and arc-shaped rack are two groups, are respectively arranged on mainframe axis two sides, institute
Two groups of driving gears are stated (to be synchronized in Fig. 1 by two motors by same motor driven or respectively by the synchronous driving of two motors
Driving).
Above-mentioned every group of driving gear includes drive sprocket, driven sprocket, driving gear, and the drive sprocket and motor pass
Chain, belt or Toothed Belts Gearing connection, the driven sprocket and master is arranged in dynamic connection between the drive sprocket and driven sprocket
Moving gear is coaxially connected, and driving gear is engaged with corresponding arc-shaped rack.
In some embodiments, the balanced component further includes counterweight 42, drags straw line 43 and counterweight support 41, and described drag is drawn
43 one end of rope is connected on mainframe adapter 22, and the other end is connected in counterweight 42, and to match around counterweight support 41
It weighs 42 and hangs on 41 lower section of counterweight support.
In the example of fig. 1,41 upper end of counterweight support is equipped with Y shape pulley assembly, i.e., at the end of the Liang Ge branch of Y shape
End is respectively equipped with a support pulley, and the straw line 43 of dragging is erected on support pulley.
In the example of fig. 1, be provided with to drag on the mainframe adapter 22 and draw arm 44, it is described drag draw arm 44 setting with
Adapter axis same level height, and it is set to the side at 22 back side of mainframe adapter, or the horizon crossing that is in U-shape is in host
The two sides at 22 back side of frame adapter, it is described drag straw line 43 and be connected to drag the free end for drawing arm or what is be in U-shape drags the midpoint for drawing arm 44
On (as shown in Figure 1).
Further, the frame upper is additionally provided with a support arm 45, and the free end of support arm 45 is equipped with a bracket pulley, described
It drags 43 one end of straw line and is connected to drag and draw on arm 44, then be finally connected to counterweight 42 in order around on bracket pulley, support pulley
On.
Above-mentioned is the example that balanced component adds pulley blocks using counterweight, in practical applications, balance can be achieved there are also very much
Scheme, for example dragging the mode that counterweight is loaded directly on arm 44 of drawing, or pass through lever, one sliding peace of gear set transmission connection
Counterweight on guide rail loaded on vertical or certain inclination angle, as long as achieving the purpose that the present invention needs.
Balanced component failure bring risk in order to prevent in some embodiments can be suitable in the bracket and mainframe
Breaking piece is additionally provided between orchestration, simplest breaking piece can be one and be connected to counterweight and mainframe adapter
Between safety rope, still, when drag straw line fracture when, whole system still can be subjected to impact, may cause equipment damage or
Other potential risks.
Therefore, in other embodiments, we can use following scheme, the breaking piece packet in the program
It includes:
Connecting rod, one end be connected on bracket or mainframe adapter on, the other end is equipped with the bigger piston portion of diameter；
Cylinder is damped, one end is connected on mainframe adapter or on bracket, with hollow cavity, that is, damping cavity, the work
Piston part is sheathed in damping cavity, and has air-tightness and freely slidable, and the diameter of the damping cavity of resistance damping cylinder free end is small
In piston portion, and airtight member is equipped between connecting rod, it is external logical with damping cavity that the both ends of the damping cylinder are equipped with perforation
Stomata.
When working properly, mainframe adapter slowly rotates, and the piston portion of connecting rod also synchronizes slow shifting in damping cavity
Dynamic, damping cavity is divided into two chambers by piston portion, and when piston portion is mobile, two chambers are distinguished slow by respective venthole
Air inlet and exhaust, when balanced component catastrophic failure, mainframe adapter disequilibrium rapidly rotates, at this point, drive piston portion
Rapidly move, the air in a side cavity in damping cavity is compressed, and another side cavity then forms strong negative pressure, due to venthole compared with
Small, in addition air is difficult to be compressed, therefore under the action of the resistance of air and the pulling force of chamber negative pressure, piston portion can only be slow
It is mobile, to pull mainframe adapter, it rotate it can only slowly, prevent safety accident.
In order to which adapter is parked in some position, on the basis of above scheme, it is equipped at the venthole automatically controlled
Valving, the electric control valve device includes electric control valve, sensor and controller, when sensor detects air pressure or gas
When flow is mutated, controller controls electric control valve and closes.After electric control valve is closed, it is equivalent to and plugs venthole, therefore, piston
Portion can not just move again, to realize the stopping and locking of mainframe adapter at an arbitrary position.It can also be further
Even the control of gas flow (such as using the electric control valve of multiple small flows, or is adopted by the opening and closing of control electric control valve
With the electric control valve that can control opening angle or aperture of circulating), to realize the control to adapter velocity of rotation and position.
It since in practical applications, the pitch angle of mainframe generally nothing requires more than 30 °, therefore is not in mainframe adaptation
Device rotation is greater than 90 ° and the unbalance state of center of gravity occurs, in practical applications, makes counterweight and mainframe adapter as far as possible, accelerates
The center of gravity of the assembly of the components such as device, mainframe is located on or near isocenter point, and system is made to do pitching motion as far as possible
When, the offset that assembly center of gravity occurs is as small as possible, so that the power that assembly is applied on driving gear is also small as far as possible.
In practical applications, in order to mitigate the load of driving device as far as possible, it is required that eccentric moment GxL1 be equal to or
It is approximately equal to counteractive eccentric moment FxL2, in which:
G is comprising mainframe, mainframe adapter, accelerator and the auxiliary device installed thereon, the group of Dan Buhan counterweight
Fit center of gravity, the arm of force relative to isocenter point are L1, then eccentric moment is GxL1；
F is the active force that counterweight part generates, and the arm of force relative to isocenter is L2, and the eccentric moment generated is
FxL2。
Make GxL1=FxL2 or gap as small as possible as far as possible to meet.As shown in Fig. 2, mainframe, mainframe at this time
Adapter, accelerator and the auxiliary device installed thereon are in initial position, at this time the ray central axes of accelerator perpendicular to
Horizontal plane, and isocenter point is passed through, as shown in Figure 2:
1, equipment moving part (mainframe, mainframe adapter, accelerator and the auxiliary device installed thereon, without matching
Center of gravity again) is about in point G, and the arm of force of isocenter is L1, then eccentric moment is GxL1.
2, the active force that counterweight part generates is F, and the arm of force of isocenter is L2, and counteractive eccentric moment is
FxL2；
3, motion parts (containing counterweight) center of gravity is in isocenter point ISO when perfect condition GxL1=FxL2, i.e. equilibrium state
Locate (G ').
Wherein, M indicates to pass through the vertical datum level of isocenter point.
As shown in Figure 3 and Figure 4, it (does pitching movement in mainframe different rotation angle or perhaps nods, faces upward head
Movement), the weight of motion parts (mainframe, mainframe adapter, accelerator and the auxiliary device installed thereon, be free of counterweight)
Heart G be it is mobile, then it is also changing with respect to the arm of force L1 of isocenter point.
Perfect condition is: even if entire motion parts (mainframe, mainframe adapter, accelerator and are installed attached thereon
Belong to equipment, contain counterweight) comprehensive function position of centre of gravity decline at the equal place centers G ', but as long as falling in through isocentric vertical base
On quasi- face M, in this way because the decomposition power in horizontal direction is canceled out because of the supporting role of frame supporting structure, and
Decomposing force on vertical direction surrounds isocentric rotating tendency because waiting the centers arm of force relatively is 0, it is believed that
It is balance.
But practical situation is more likely to occur situation as shown in Figure 5: because counterweight be it is constant, and motion parts with
It is different to rotate angle, position of centre of gravity is variation, so comprehensive function center of gravity may not be able to be fallen on vertical datum level M, and
Have certain offset L ', but L ' is relatively small at this time, caused by rotation torque load it is small, this fractional load can be by driving machine
The devices such as the gear and motor internal contracting brake of structure are born, and ultimately form dynamic equilibrium.Compared with the existing technology, this offset bring
Torque greatly reduces, so that the torque born on transmission device also greatly reduces.
The difference of above-mentioned eccentric moment, it is necessary to control within the scope of the output torque of motor, i.e. GxL1 and FxL2 it
Between difference, be not greater than the output torque of motor, it is general to choose the half for being not more than motor output torque for the sake of safety
Value, this value are zero better more leveling off to.It, can be according to the rated power and its electromagnetic parameter of electrode as the output torque of motor
It is calculated.Certainly, if auxiliary is with the lock brake device of band-type brake etc, this difference can choose larger, with lock
Determine clasping subject to power energy safety locking for brake gear, the power of such motor can suitably select smaller.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection scope.
Claims (10)
1. a kind of accelerator therapy device, the accelerator therapy device includes mainframe, accelerator, and the accelerator is installed on
On the mainframe, which is characterized in that the accelerator therapy device further include:
Mainframe adapter, the mainframe are installed on mainframe adapter, and can be around axis, that is, host of mainframe itself
Frame axis rotates freely；
Bracket, the mainframe adapter are rotatably installed on bracket, the axis of the adapter shaft of mainframe adapter
I.e. adapter axis is vertical with mainframe axis；
Pitch drive is sequentially connected with the mainframe adapter, and drives mainframe adapter around its adapter axis
Rotation；
The accelerator follows mainframe to rotate, and the ray central axes of its transmitting are vertical with the mainframe axis and intersect
In a bit, i.e. isocenter point；The rotation of mainframe and the rotation of mainframe adapter are so that accelerator changes position in three-dimensional space
It sets and is always positioned on same spherical surface, the centre of sphere of the spherical surface is overlapped with isocenter point；
Balanced component is set on mainframe adapter, and the two sides of adapter axis are located at mainframe, mainframe
And the total force for the equipment being installed on mainframe applies opposite torque with the gravity of balanced component to adapter shaft respectively.
2. accelerator therapy device according to claim 1, which is characterized in that the pitch drive includes:
Motor, the driving gear being installed on ground or bracket, the motor drive driving gear rotation；
The arc-shaped rack being installed on mainframe adapter, the arc-shaped rack are engaged with driving gear, the driving gear band
Dynamic arc-shaped rack rotation, arc-shaped rack drive mainframe adapter to rotate around adapter axis；The midpoint of the arc-shaped rack with
The ray central axes that line between equal centers emits with accelerator are orthogonal.
3. accelerator therapy device according to claim 2, which is characterized in that the driving gear and arc-shaped rack are two
Group, is respectively arranged on mainframe axis two sides, and two groups of driving gears are synchronous by two motors by same motor driven or respectively
Driving.
4. accelerator therapy device according to claim 3, which is characterized in that the driving gear include drive sprocket,
Driven sprocket, driving gear, the drive sprocket are connect with motor drive, and chain is arranged between the drive sprocket and driven sprocket
Item, belt or Toothed Belts Gearing connection, the driven sprocket is coaxially connected with driving gear, and driving gear is engaged with arc-shaped rack.
5. according to claim 1 to 4 any accelerator therapy devices, which is characterized in that the balanced component includes matching
Weight drags straw line and counterweight support, and described straw line one end of dragging is connected on mainframe adapter, and the other end is connected in counterweight, and
And make balance weight hanging below counterweight support around counterweight support.
6. accelerator therapy device according to claim 5, which is characterized in that the counterweight support upper end is sliding equipped with Y shape
Wheel assembly is respectively equipped with a support pulley in the end of the Liang Ge branch of Y shape, the straw line of dragging is erected on support pulley
On.
7. accelerator therapy device according to claim 6, which is characterized in that be provided with and drag on the mainframe adapter
Draw arm, it is described drag draw arm setting with adapter axis same level height, and be set to the side at the mainframe adapter back side,
Or the horizon crossing that is in U-shape is in the two sides at the mainframe adapter back side, it is described drag straw line and be connected to drag the free end for drawing arm or be in U-shape
Drag and draw on the midpoint of arm；
The frame upper is additionally provided with a support arm, and the free end of support arm is equipped with a bracket pulley, and described straw line one end of dragging is connected to
It drags and draws on arm, then be finally connected in counterweight around on bracket pulley, support pulley in order.
8. accelerator therapy device according to claim 1, which is characterized in that between the bracket and mainframe adapter
It is additionally provided with breaking piece, the breaking piece includes:
Connecting rod, one end be connected on bracket or mainframe adapter on, the other end is equipped with the bigger piston portion of diameter；
Cylinder is damped, one end is connected on mainframe adapter or on bracket, with hollow cavity, that is, damping cavity, the piston portion
It is sheathed in damping cavity, and there is air-tightness and freely slidable, the diameter of the damping cavity of resistance damping cylinder free end, which is less than, lives
Piston part, and airtight member is equipped between connecting rod, the both ends of the damping cylinder are equipped with the external venthole with damping cavity of perforation.
9. accelerator therapy device according to claim 8, which is characterized in that be equipped with electric control valve at the venthole
Device, the electric control valve device includes electric control valve, sensor and controller, when sensor detects air pressure or gas flow
When mutation, controller controls electric control valve and closes.
10. according to claim 1 to 4,8 to 9 any accelerator therapy devices, which is characterized in that eccentric moment GxL1
At or about counteractive eccentric moment FxL2, in which:
G is but to be free of the assembly of counterweight comprising mainframe, mainframe adapter, accelerator and the auxiliary device installed thereon
Center of gravity, relative to isocenter point the arm of force be L1, then eccentric moment be GxL1；
F is the active force that counterweight part generates, and the arm of force relative to isocenter is L2, and the eccentric moment generated is
FxL2。
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| CN105920747A (en) | 2016-09-07 |
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