CN108992080A - Gravitational equilibrium mechanism - Google Patents
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- CN108992080A CN108992080A CN201810551822.7A CN201810551822A CN108992080A CN 108992080 A CN108992080 A CN 108992080A CN 201810551822 A CN201810551822 A CN 201810551822A CN 108992080 A CN108992080 A CN 108992080A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 39
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 230000005484 gravity Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
- A61B6/447—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit or the detector unit being mounted to counterpoise or springs
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
The present invention provides a kind of gravitational equilibrium mechanism, including pedestal, fixed fixation pulley and angle pulley on the base, the sliding block of opposite base sliding, the elastic component supported with sliding block, it is fixed to the motion pulley of sliding block, a pair of of the connecting rod being connect with motion pulley, a pair of of the side roller and winding angle pulley being connect respectively with connecting rod, side roller, the wirerope of motion pulley and fixed pulley, the fixed pulley, motion pulley and side roller pass through first axle respectively, second axis and third axis are fixed and can be rotating around the first axles, second axis and the rotation of third axis, the pedestal is equipped with a pair of of guide groove, the relatively described elastic component of the pair of guide groove is symmetrical arranged, the third axis is in rolling contact in the guide groove with its side wall, the connecting rod can be rotated around second axis and the third axis.
Description
Technical field
The present invention relates to the gravitational equilibrium mechanisms in technical field of medical treatment mechanical more particularly to a kind of DR equipment.
Background technique
DR (Digital Radiography) equipment is the abbreviation for digitizing direct imaging optics, is imaged and has than traditional X-ray
Standby image is apparent, amount of radiation is lower, checks speed faster, checks the advantages that having higher success rate.The bulb of general DR equipment or
Panadaptor on person's column is required along straight line elevating movement.In order to realize laborsaving and stable hand-operated lifting or electricity
Dynamic lifting, it will usually gravitational equilibrium mechanism is used, for offsetting the gravity of bulb or panadaptor, so that movement is more labor-saving,
Control is more convenient.
General gravitational equilibrium mechanism, offset the mode of gravity there are several types of:
First is that counterweight balances, the gravity of bulb panadaptor is offset with same quality or the at double counterweight of quality, it is excellent
Point is that plumbness gravity can accurately be offset, the disadvantage is that counterweight quality itself is larger, and counterweight need to fortune synchronous with lifting object
Dynamic, structure is complicated and stroke limiting system.
Second is that the power of extension spring is converted to relatively stable power output using variable diameter pulley, the disadvantage is that when stretching bullet
When the power output of spring is larger, structure size itself can and then become larger, and structure is very limited, and cause power output limited.
Third is that using Spring balancer, the curling of inner utilization wind spring and loosen and cooperate variable diameter pulley, carrys out output phase
To stable power, advantage is compact-sized, the disadvantage is that the service life is shorter, and power output limited size, is normally only used for offsetting weight
The case where when power is smaller.
Summary of the invention
The present invention provides the gravitational equilibrium mechanism that a kind of stroke is long and output force value is stable.
The present invention provides a kind of gravitational equilibrium mechanism, including pedestal, fixed fixation pulley and angle pulley on the base,
The sliding block of opposite base sliding, the elastic component supported with sliding block, the motion pulley for being fixed to sliding block, connect with motion pulley one
A pair of of side roller and winding angle pulley, side roller, motion pulley and the fixed cunning being connect to connecting rod, respectively with connecting rod
The wirerope of wheel, the fixed pulley, motion pulley and side roller pass through first axle, the second axis and third axis respectively to carry out
It fixes and can be rotated rotating around the first axle, the second axis and third axis, the pedestal is equipped with a pair of of guide groove, the pair of
The relatively described elastic component of guide groove is symmetrical arranged, and the third axis is in rolling contact in the guide groove with its side wall, the company
Extension bar can be rotated around second axis and the third axis.
Further, the gravitational equilibrium mechanism includes the elastic component of several settings in series or in parallel.
Further, the elastic component is normal linear spring.
Further, the elastic component is gas spring.
Further, the opposite end of the gas spring is individually secured to the sliding block and the pedestal.
Further, the pedestal is equipped with the recessed groove extended vertically, and the gravitational equilibrium mechanism is equipped with positioned at described recessed
The sliding rail in slot is fallen into, the sliding block is slided along the sliding rail.
Further, the motion pulley is identical as the diameter of the side roller.
Further, the angle pulley, side roller, motion pulley and fixed pulley include several grooves.
Further, in the groove, angle pulley described in the wirerope-winding breaks away for the wirerope receiving
The circle number of wheel, motion pulley and fixed pulley is more than or equal to 1.
Further, the pedestal is equipped with the container for accommodating the angle pulley, and the container is close to the fixation
Pulley.
Gravitational equilibrium mechanism of the present invention is by one group of dynamic pulley mechanism, so that the power output that elastic component changes with decrement
The stroke for being converted into the stable power output of force value with movement travel and doubling, for the gravity of balance lifting object, weight of the present invention
Dynamic balance mechanism is compact-sized, and power output is steady, and output force value can it is bigger, delivery stroke is longer.
Detailed description of the invention
Fig. 1 is the perspective view of the gravitational equilibrium mechanism shown in the embodiment of the present invention.
Fig. 2 is that the motion pulley of gravitational equilibrium mechanism shown in FIG. 1 is in the perspective view of first position.
Fig. 3 is that the motion pulley of gravitational equilibrium mechanism shown in FIG. 1 is in the perspective view of the second position.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
With reference to the accompanying drawing, it describes in detail to gravitational equilibrium mechanism of the present invention.
Referring to shown in Fig. 1 to Fig. 3, gravitational equilibrium mechanism of the present invention includes pedestal 1, the fixation pulley being fixed on pedestal 1
2, angle pulley 3 and line slide rail 4, slided on line slide rail 4 sliding block 5, supported with sliding block 5 elastic component 6, be fixed to cunning
The motion pulley 7 of block 5, a pair of of the connecting rod 71 being connect with motion pulley 7, a pair of of the side roller 8 being connect with connecting rod 71 and
Wind the wirerope 9 of angle pulley 3, side roller 8, motion pulley 7 and fixed pulley 2.Elastic component 6 is used for power output and stroke.
In the present embodiment, the elastic component 6 is gas spring, and opposite end is individually secured to the sliding block 5 and the pedestal 1, this
Invention is not limited thereto, and the elastic component 6 is also possible to normal linear spring.In the present embodiment, it is provided only with a bullet
Property part 6, the present invention is not limited thereto, and several elastic components 6 in series or in parallel can be set in gravitational equilibrium mechanism of the present invention.
The pedestal 1 is equipped with the recessed groove 10 extended along the vertical direction, a pair of guiding positioned at 10 two sides of recessed groove
The container 12 of slot 11 and close fixed pulley 2.The line slide rail 4 is located in the recessed groove 10.The angle pulley 3
It is housed in the direction in the container 12 for changing wirerope 9.
The fixed pulley 2 is fixed on the pedestal 1 by first axle 21, and the motion pulley 7 passes through the second axis 71
It is fixed on the sliding block 5, the pair of side roller 8 is fixed to connecting rod 8 by third axis 81 respectively.The fixed pulley 2
It can be rotated around the first axle 21.The fixed pulley 2 is located at the underface of the motion pulley 7.The motion pulley 7 can be with
The sliding block 5 is moved on the line slide rail 4 and can be rotated around second axis 71.The pair of guide groove 11 is relatively described
Gas spring is symmetrical arranged.The pair of side roller 8 can be rotated around the third axis 81, and the third axis 81 is in the guide groove 11
Interior sliding is simultaneously contacted with the side wall of the guide groove 11.The connecting rod 71 can be revolved around second axis 71 with the third axis 81
Turn, guarantees that the motion pulley 7 is constant at a distance from the side roller 8.The angle pulley 3, side roller 8, motion pulley 7 with
Fixed pulley 2 is equipped with several grooves 31 for accommodating the wirerope 9.The diameter of the motion pulley 7 and the side roller 8
It is identical.
The principle of gravitational equilibrium mechanism of the present invention is as follows:
Motion pulley 7 moves in a straight line together with gas spring, and a pair of of side roller 8 is connected by connecting rod 71 and motion pulley 7
It connects and is moved along guide groove 11.The distance between motion pulley 7 and side roller 8 L (AB) are the definite value of setting, motion pulley 7
The distance between fixed pulley 2 L (AC) is changing value, and initial value determines.
Wire definition between first axle 21 and the second axis 71 is the first connecting line, between third axis 91 and the second axis 71
Wire definition is the second connecting line, and the wire definition between first axle 21 and third axis 91 is third connecting line, wherein first connects
Angle between wiring and third connecting line is defined as α, and the angle between the first connecting line and the second connecting line is defined as β, α with
The angle value of β changes with the movement of motion pulley 7, and the size of the angle value of α and β is determined by guide groove 11.
It is defined on some position, the contact angle coefficient of the side wall of the third axis 81 and guide groove 11 of side roller 8 is K.K is fixed
Justice is in a certain position, when side roller 8 is moved along guide groove 11, movement velocity perpendicular to the direction of the first connecting line and flat
Row is the amount of a variation in the ratio of the movement velocity in the direction of the first connecting line；The side wall and side of K i.e. guide groove 11
The slope that the third axis 81 of pulley 8 contacts.Determine the side wall of guide groove 11 to the anti-of the contact surface of the third axis 81 of side roller 8
Power.
Assuming that the stable power F (wirerope) that wirerope 9 exports, each position of wirerope 9 are in the same size.Movable pulley 7
By power F (A)=2*F (wirerope) * COS β of wirerope 9, it is oriented parallel to the direction of the first connecting line；Side roller 8 by
Resultant force F (B)=2* (F (wirerope) * COS α-F of the power of the side wall of wirerope 9 and guide groove 11 in the direction of the first connecting line
(wirerope) * COS β)+(F (wirerope) * SIN β+F (wirerope) * SIN α) * K.The then combination of movable pulley 7 and side roller 8, by
To the direction for being parallel to the first connecting line resultant force F (A+B resultant force)=2*F (wirerope) * COS β+2* (F (wirerope) * COS
α-F (wirerope) * COS β)+2* (F (wirerope) * SIN β+F (wirerope) * SIN α) * K=2*F (wirerope) * (COS α+K*
SINβ+K*SINα)。
The power F (gas spring) of gas spring can be approximated to be F (gas spring)=F1+kS, wherein F1 according to the characteristic of gas spring
It is setting value for the starting force of gas spring, small letter k is the coefficient of elasticity of the gas spring calculated, is specific to certain a gas spring
Value, S is reduction length.So that F (A+B resultant force)=F (gas spring), i.e. 2*F (wirerope) * (COS α+K*SIN β+K*SIN α)=
F1+kS obtains F (wirerope)=(F1+kS)/(COS α+K*SIN β+K*SIN α)/2.Corresponding each position, α angle=ATAN
(L (AB) * SIN β/(L (AC)-L (AB) * COS β)), is one using β as the relevant function of variable according to trigonometric function relationship α,
One timing of L (AC) value, the corresponding α of a β.
Meanwhile L (AC)=L (AC initial length value)-S, then available, F (wirerope)=(F1+kS)/(COS (ATAN
(L(AB)*SINβ/(L(AC)-L(AB)*COSβ)))+K*SINβ+K*SIN(ATAN(L(AB)*SINβ/(L(AC)-L(AB)*
COS β))))/2, it is, F (wirerope) and angle beta are corresponding relationship in mono- timing of gas spring decrement S.It is,
Each S value, so that the power of F (wirerope) is almost the same, can reach the stable purpose of power output by adjusting the size of β.
The β obtained by the above corresponding relationship, the motion profile of available side roller 8.
As shown in figure 3, distance L (AC) shortens between fixed pulley 2 and motion pulley 7, simultaneously with the compression of gas spring
β angle also changes.β value is to be moved by a pair of of side roller 8 along guide groove 11 to guarantee.So that meeting F (wirerope)
For a stable force value.
The gas spring of gravitational equilibrium mechanism of the present invention is also possible to a starting force for F1, and the line that coefficient of elasticity k is constant
Property spring.
The linear force for illustrating the variation that gravitational equilibrium mechanism of the present invention exports gas spring below by way of data are calculated, turns
It is changed to the stable power output of size.
Assuming that, it is desirable that the power output of wirerope 9 is 418N, selects the starting force F1=800N of a Hookean spring；Stroke
For 200mm.In 200mm stroke, the characteristic value of the gas spring of selection is 1.35, if normal linear spring, coefficient of elasticity k
=1.15, distance L (AC is initial)=600mm, motion pulley 7 and side roller 8 between motion pulley 7 and fixed pulley 2 when initial
Between distance L (AB)=200mm.Wirerope 9 winds the circle number of angle pulley 3, side roller 8, motion pulley 7 and fixed pulley 2
It is 1.The value of F (wirerope) is calculated according to the above-mentioned formula of F (wirerope), as shown in the table, corresponding β, can from 40 ° to 21 °
To guarantee F (wirerope) ≈ 403.5 (first number is ignored, and contact angle values of factor K is estimation), exist relative to gas spring
Power changes to 1030 from 800 on 200mm stroke, power output change rate very little, and exports distance and become 400mm.
The above accuracy in computation is influenced by pixel selecting quantity and value precision, takes points more, and value is more accurate, meter
It is more accurate to calculate.So by different type selecting and design, available various desired stable power outputs.The fortune of side roller 8
Dynamic rail mark ensure that the linear force of the variation of gas spring output, be converted to the stable power output of size.
In the present embodiment, winding angle pulley 3, side roller 8, motion pulley 7 and the wirerope 9 on fixed pulley 2 is
One circle, the present invention is not limited thereto, and n circle (n > 1) wirerope 9 can be set in gravitational equilibrium mechanism of the present invention, thus will output
Power is reduced by n multiple, and the movement length of wirerope is increased by n multiple.
Gravitational equilibrium mechanism of the present invention is by one group of dynamic pulley mechanism, so that the power output that elastic component changes with decrement
The stroke for being converted into the stable power output of force value with movement travel and doubling, for the gravity of balance lifting object, weight of the present invention
Dynamic balance mechanism is compact-sized, and power output is steady, and output force value can it is bigger, delivery stroke is longer.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, in the range of not departing from technical solution of the present invention, when the technology contents using the disclosure above are modified or are repaired
Decorations are the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, technology according to the present invention are real
Matter any simple modification, equivalent change and modification to the above embodiments, still fall within the range of technical solution of the present invention
It is interior.
Claims (10)
1. a kind of gravitational equilibrium mechanism, which is characterized in that the gravitational equilibrium mechanism includes pedestal, fixed fixation on the base
Sliding block that pulley and angle pulley, opposite base slide, the elastic component supported with sliding block, the motion pulley for being fixed to sliding block, with
A pair of of connecting rod of motion pulley connection, a pair of of side roller for connect respectively with connecting rod and wind angle pulley, side roller,
The wirerope of motion pulley and fixed pulley, the fixed pulley, motion pulley and side roller pass through first axle, second respectively
Axis and third axis are fixed and can rotate rotating around the first axle, the second axis and third axis, and the pedestal is equipped with one
To guide groove, the relatively described elastic component of the pair of guide groove be symmetrical arranged, the third axis in the guide groove with its side
Wall is in rolling contact, and the connecting rod can be rotated around second axis and the third axis.
2. gravitational equilibrium mechanism according to claim 1, which is characterized in that the gravitational equilibrium mechanism includes several series connection
Or the elastic component being arranged in parallel.
3. gravitational equilibrium mechanism according to claim 1 or 2, which is characterized in that the elastic component is normal linear spring.
4. gravitational equilibrium mechanism according to claim 1 or 2, which is characterized in that the elastic component is gas spring.
5. gravitational equilibrium mechanism according to claim 4, which is characterized in that the opposite end of the gas spring is fixed respectively
To the sliding block and the pedestal.
6. gravitational equilibrium mechanism according to claim 5, which is characterized in that the pedestal is equipped with the recess extended vertically
Slot, the gravitational equilibrium mechanism are equipped with the sliding rail being located in the recessed groove, and the sliding block is slided along the sliding rail.
7. gravitational equilibrium mechanism according to claim 1, which is characterized in that the motion pulley is straight with the side roller
Diameter is identical.
8. gravitational equilibrium mechanism according to claim 1, which is characterized in that the angle pulley, side roller, motion pulley
It include several grooves with fixed pulley.
9. gravitational equilibrium mechanism according to claim 8, which is characterized in that the wirerope accommodates in the groove,
Angle pulley described in the wirerope-winding, side roller, motion pulley and the circle number for fixing pulley are more than or equal to 1.
10. gravitational equilibrium mechanism according to claim 1, which is characterized in that the pedestal, which is equipped with, accommodates the commutation cunning
The container of wheel, the container is close to the fixed pulley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810551822.7A CN108992080B (en) | 2018-05-31 | 2018-05-31 | Gravity balance mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810551822.7A CN108992080B (en) | 2018-05-31 | 2018-05-31 | Gravity balance mechanism |
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| Publication Number | Publication Date |
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| CN108992080A true CN108992080A (en) | 2018-12-14 |
| CN108992080B CN108992080B (en) | 2022-05-10 |
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| CN201810551822.7A Active CN108992080B (en) | 2018-05-31 | 2018-05-31 | Gravity balance mechanism |
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| CN108992080B (en) | 2022-05-10 |
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Address after: 110167 No. 177-1 Innovation Road, Hunnan District, Shenyang City, Liaoning Province Applicant after: DongSoft Medical System Co., Ltd. Address before: 110167 No. 177-1 Innovation Road, Hunnan District, Shenyang City, Liaoning Province Applicant before: Dongruan Medical Systems Co., Ltd., Shenyang |
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