CN201306579Y - A cam-type pipeline robot motion mechanism - Google Patents
A cam-type pipeline robot motion mechanism Download PDFInfo
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- CN201306579Y CN201306579Y CNU2008202108792U CN200820210879U CN201306579Y CN 201306579 Y CN201306579 Y CN 201306579Y CN U2008202108792 U CNU2008202108792 U CN U2008202108792U CN 200820210879 U CN200820210879 U CN 200820210879U CN 201306579 Y CN201306579 Y CN 201306579Y
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- cam
- parallelogram
- connecting rod
- cylinder stent
- torsion spring
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Abstract
The utility model discloses a cam-type pipeline robot motion mechanism, which comprises a cylinder bracket, three groups of parallelogram four-bar mechanism and a driving mechanism; wherein, the three groups of parallelogram four-bar mechanisms are distributed on the cylinder bracket along circumferential direction with equal interval; the driving mechanism is used for driving the three groups of parallelogram four-bar mechanisms to fold or unfold; each parallelogram four-bar mechanism comprises two rockers and a connecting rod connected between the two rockers; the two rockers are respectively hinged with the cylinder bracket; wherein, one rocker is connected with the driving mechanism; a cam mechanism is respectively mounted at the middle part of each connecting rod; the cam mechanism comprises a cam, a pin shaft and a torsion spring nested on the pin shaft; the cam is hinged at the middle part of each connecting rod; one end of the torsion spring is fixedly connected with each connecting rod and the other end is fixedly connected with the cam; the cam is maintained to extend out of each connecting rod under the pre-tightening force of the torsion spring. The cam-type pipeline robot motion mechanism adopts the self-locking of cam to improve traction capacity and utilizes the deformation of parallelogram four-bar mechanisms to improve adaptive capacity towards pipe diameter variation.
Description
Technical field
The utility model relates to the creeping type pipeline robot, relates in particular to movement mechanism of cam type pipe robot.
Background technique
Operation exists very big difficulty and dangerous in microchannel, and the microminiature tube pipeline robot provides a kind of otherwise effective technique approach for it.At present, the microminiature tube pipeline robot is mainly used in the numerous tiny pipeline of industries existence such as nuclear power station, cogeneration power plant, chemical industry, refrigeration and the detection of various complex power system pipelines.Numerous countries all pay much attention to the development of microminiature tube pipeline robot, and numerous and confused infusion of financial resources and time have been launched research to such Robotics, and have obtained certain achievement in research.The research laboratory of Japan DENSO CORP company has developed a kind of stacked piezoelectric final controlling element micro robot, this robot is made up of four parts: the thin-sheet metal matrix that 60um is thick, two vortex sensors detect wall defects, motion (motion comprises that three U-shaped spring clip clamping unit elasticity are adjacent to tube wall, a stacked piezoelectric final controlling element and a mass block) and radiating fin, the robot diameter only is 5.5mm, be applicable to the straight tube or the bend pipe of 8mm caliber, travelling speed 10mm/s.Precision optical machinery research institute of Shanghai University is studied two kinds of piezo actuator robots, and wherein stacked piezoelectric final controlling element robot can be suitable for 10mm caliber level or vertical pipeline intraductal operation, forward velocity 2.19mm/s, and astern speed 2.48mm/s is of a size of
Grade ability with 0～90 degree; Bimorph final controlling element robot is suitable for 20mm caliber level, vertically or in the crooked pipeline detects, and the interior speed up and down of vertical tube is respectively 4～6mm/s, 17～22mm/s.
The pipeline robot traveling gear is the walking power section that is applied in the pipeline robot, at present the mode of advancing of pipeline robot mainly contains wheeledly directly to advance, wheeled helical advances and creeping type, no matter adopt wherein any mode, the tractive force of pipeline robot all is to be provided by the frictional force between traveller and the tube wall, so improving tractive force, desire must correspondingly increase frictional force, but have less frictional force when but wishing to obtain bigger tractive force in actual applications, this is the contradiction that microminiature tube pipeline robot field need solve.Another one contradiction be pipeline robot self diameter and its contradiction between the size of adaptable caliber excursion, existing have better caliber and change himself diameter of adaptive pipeline robot all more than 50mm, is difficult to adapt to less caliber and the bigger bend pipe of curvature.Simultaneously, it is very poor that the caliber of microminiature tube pipeline robot (diameter is less than 20mm) changes adaptability, near self external diameter a very little excursion can only be arranged.
The model utility content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, provides a kind of self-locking that utilizes cam to improve driving power, utilizes the distortion of parallelogram fourbar linkage to improve the movement mechanism of cam type pipe robot that caliber is on a large scale changed the adaptive capacity of pipeline.
For solving the problems of the technologies described above, the utility model by the following technical solutions.
A kind of movement mechanism of cam type pipe robot, comprise cylinder stent, three groups of parallelogram fourbar linkages along the circumferential direction equidistantly arranging are installed on the described cylinder stent and drive the driving mechanism that three groups of parallelogram fourbar linkages launch or draw in, each parallelogram fourbar linkage comprises two rocking bars and is connected in two connecting rods between the rocking bar, two rocking bars are hinged with cylinder stent respectively, wherein a rocking bar links to each other with driving mechanism, each connecting rod middle part all is equiped with cam mechanism, described cam mechanism comprises cam, bearing pin and the torsion spring that is sheathed on the bearing pin, cam is articulated in the connecting rod middle part by bearing pin, torsion spring one end is fixedlyed connected with connecting rod, the other end is fixedlyed connected with cam, described cam keeps stretching out beyond the connecting rod under the pretightening force effect of torsion spring.
Described driving mechanism comprises drive motor, feed screw nut, ball screw and two drive link, described drive motor is fixed on the cylinder stent, described ball screw and cylinder stent concentric are provided with, and the one end links to each other with the output terminal of drive motor, described feed screw nut is set on the ball screw, a rocking bar in each drive link one end and the parallelogram fourbar linkage is hinged, and the other end and feed screw nut are hinged.
Described ball screw cooperates with the reverse self-locking of feed screw nut.
Described connecting rod is parallel with the central axis of cylinder stent, cylinder stent is provided with and is used for ccontaining three containing grooves that are in the parallelogram fourbar linkage of rounding state, three containing grooves arrange equidistantly that along the circumferential direction the rocking bar of each parallelogram fourbar linkage is articulated in the containing groove.
Compared with prior art, advantage of the present utility model is:
Advance when 1, cam mechanism utilizes unidirectional movement mechanism to be subjected to forward thrust, the mechanical characteristic of locking pipe inwall makes the big I of pipeline robot tractive force not be subjected to the influence of frictional force when being subjected to reversal interlocking relay, can still can keep advancing at utmost speed under the situation of heavy load.Make the tractive force of pipeline robot satisfy pipeline robot large traction demand from the restriction of principle breakthrough frictional force.Make pipeline robot when advancing fast, can provide bigger tractive force, solved the contradiction between tractive force and the frictional force.
2, being used in combination of parallelogram fourbar linkage and cam mechanism makes pipeline robot possess the ability that becomes operation in the caliber pipeline on a large scale, move by the drive mechanism fourbar linkage, make pipeline robot adaptable caliber excursion reach the brachium of rocking bar, improved the adaptability that pipeline robot changes caliber to a great extent, fundamentally solved the defective of pipeline robot pipeline adaptive capacity difference, the ability that makes pipeline robot initiatively adapt to caliber variation on a large scale strengthens greatly.
3, feed screw nut can make cam produce with inner-walls of duct along the positive movement of the ball screw direction of drive motor (promptly away from) and contact, but, when cam contacts with inner-walls of duct and progressively locks, tube wall can make the trend that the oriented drive motor direction of feed screw nut moves along conduit axis to the active force of pipeline robot, cooperate by the mode that ball screw and feed screw nut are made as with reverse self-locking, make feed screw nut can not produce moving axially to motor drive direction, avoid feed screw nut to drive cam mechanism, prevent that cam is forced to cause self-locking to lose efficacy with the tube wall disengaging along pipeline contraction radially.
4, connecting rod is parallel with the central axis of cylinder stent, cylinder stent is provided with and is used for the ccontaining containing groove that is in the parallelogram fourbar linkage of rounding state, the parallelogram fourbar linkage can place in the containing groove of cylinder stent when drawing in fully, this structure can be reduced radially traveling gear to greatest extent and is taken up room, and is suitable for working in the microminiature pipeline.
Description of drawings
Fig. 1 is a main TV structure schematic representation of the present utility model;
Fig. 2 is a right TV structure schematic representation of the present utility model;
Fig. 3 is a perspective view of the present utility model;
Fig. 4 is the cam mechanism structural representation;
Fig. 5 is the structural representation after driving mechanism is removed drive link;
Fig. 6 is that cam mechanism is in the force analysis figure under the self-locking state;
Fig. 7 is that cam mechanism is in the force analysis figure under the sliding mode.
Each label is represented among the figure:
1, cylinder stent 2, driving mechanism
3, parallelogram fourbar linkage 4, cam mechanism
5, inner tubal wall 11, containing groove
21, drive motor 22, ball screw
23, feed screw nut 24, drive link
31, rocking bar 32, connecting rod
41, cam 42, torsion spring
43, bearing pin
Embodiment
Extremely shown in Figure 7 as Fig. 1, the utility model discloses a kind of movement mechanism of cam type pipe robot, comprise cylinder stent 1, three groups of parallelogram fourbar linkages 3 and one group of driving mechanism 2 that drives 3 expansion of parallelogram fourbar linkage or draw in of along the circumferential direction equidistantly arranging are installed on the cylinder stent 1, cylinder stent 1 is provided with and is used for the ccontaining containing groove 11 that is in the parallelogram fourbar linkage 3 of rounding state, each parallelogram fourbar linkage 3 comprises two rocking bars 31 and is connected in two connecting rods 32 between the rocking bar 31, two rocking bars 31 are hinged with cylinder stent 1 respectively, connecting rod 32 is parallel with the central axis of cylinder stent 1, each connecting rod 32 middle part all is equiped with cam mechanism 4, cam mechanism 4 comprises cam 41, bearing pin 43 and the torsion spring 42 that is sheathed on the bearing pin 43, cam 41 is articulated in connecting rod 32 middle parts by bearing pin 43, torsion spring 42 1 ends are fixedlyed connected with connecting rod 32 by screw, the other end is fixedlyed connected with cam 41 by screw, torsion spring 42 is given 41 1 pretightening forces of cam, cam 41 with before inner tubal wall 5 contacts is not keeping stretching out connecting rod 32 amount maximum in addition, can provide enough positive pressures when making cam 41, guarantee the generation of self-locking and unlikely generation is slided with inner tubal wall 5 contact-types.Driving mechanism 2 comprises drive motor 21, feed screw nut 23, ball screw 22 and three drive link 24, drive motor 21 is fixed on the cylinder stent 1, ball screw 22 and cylinder stent 1 concentric setting, and the one end links to each other with the output terminal of drive motor 21, feed screw nut 23 is set on the ball screw 22, and ball screw 22 cooperates with feed screw nut 23 reverse self-lockings, the auto-lock function that can prevent cam mechanism lost efficacy, a rocking bar 31 in each drive link 24 1 end and the parallelogram fourbar linkage 3 is hinged, and the other end and feed screw nut 23 are hinged.Drive motor 21 is opened, feed screw nut 23 translation on ball screw 22, be with three drive link 24 to drive three groups of parallelogram fourbar linkages 3 by feed screw nut 23 and doing to launch or draw in motion, and parallelogram fourbar linkage 3 can place in the containing groove 11 of cylinder stent 1 when drawing in fully, this structure can be reduced radially traveling gear to greatest extent and is taken up room, be suitable in the microminiature pipeline, working, by 3 motions of drive mechanism fourbar linkage, make pipeline robot adaptable caliber excursion reach the brachium of rocking bar 31, make pipeline robot possess the ability that becomes operation in the caliber pipeline on a large scale, improved the adaptability that pipeline robot changes caliber to a great extent, fundamentally solved the defective of pipeline robot pipeline adaptive capacity difference, the ability that makes pipeline robot initiatively adapt to caliber variation on a large scale strengthens greatly.
Working principle: the telescopic unit in the pipeline robot will apply an axial thrust force along pipeline axial to movement mechanism of cam type pipe robot, when the motion of cam mechanism 4 by flat shape quadrilateral fourbar linkage 3 and inner tubal wall 5 produce contact after, can make owing to the existence of axial thrust force between the inner tubal wall 5 of cam 41 and pipeline and produce frictional force.At this moment, according to the travel direction difference of pipeline robot, will there be two kinds of situations as shown in Figure 6 and Figure 7 to take place.Among Fig. 6 and Fig. 7, the A point is the point of contact of cam 41 and inner tubal wall 5, the B point is the articulating point of cam 41 and cylinder stent 1, and f represents frictional force, and F represents that inner tubal wall 5 acts on the support force on the cam 41, F1, F2 represent positive pressure, w is the running torque of 42 pairs of cams 41 of torsion spring, and angle b is a pressure angle, and angle a is an angle of rotation, g is the lateral separation between A point and the B point, and h is the fore-and-aft distance between A point and the B point.When pipeline robot when direction is moved shown in the arrow C in Fig. 6, w+fh〉Fg, angle of rotation a has the trend of reducing, fore-and-aft distance h between A point and the B point has increase tendency, pressure angle b remains unchanged, cam 41 is realized self-locking, makes axial thrust force can reach enough big, significantly improves the ability of pipeline robot tractive load.When pipeline robot when direction is moved shown in the arrow D in Fig. 7, w＜Fg+fh, angle of rotation a has increase tendency, fore-and-aft distance h between A point and the B point has the trend of reducing, pressure angle b remains unchanged, cam 41 will slide along inner tubal wall 5, make that the frictional force when movement mechanism of cam type pipe robot is movably walking reduces greatly, thereby realize advancing fast.Cam mechanism 4 advances when utilizing unidirectional movement mechanism to be subjected to forward thrust, the mechanical characteristic of locking pipe inwall when being subjected to reversal interlocking relay, make the tractive force of pipeline robot can break through the restriction of frictional force from principle, can under the situation of heavy load, still can keep advancing at utmost speed, satisfy pipeline robot large traction demand.Make pipeline robot when advancing fast, can provide bigger tractive force, solved the contradiction between tractive force and the frictional force.
Claims (4)
1, a kind of movement mechanism of cam type pipe robot, comprise cylinder stent (1), it is characterized in that being equipped with on the described cylinder stent (1) three groups of parallelogram fourbar linkages (3) of along the circumferential direction equidistantly arranging and drive the driving mechanism (2) that three groups of parallelogram fourbar linkages (3) launch or draw in, each parallelogram fourbar linkage (3) comprises two rocking bars (31) and is connected in connecting rod (32) between two rocking bars (31), two rocking bars (31) are hinged with cylinder stent (1) respectively, wherein a rocking bar (31) links to each other with driving mechanism (2), each connecting rod (32) middle part all is equiped with cam mechanism (4), described cam mechanism (4) comprises cam (41), bearing pin (43) and be sheathed on torsion spring (42) on the bearing pin (43), cam (41) is articulated in connecting rod (32) middle part by bearing pin (43), torsion spring (42) one ends are fixedlyed connected with connecting rod (32), the other end is fixedlyed connected with cam (41), described cam (41) keeps stretching out connecting rod (32) in addition under the pretightening force effect of torsion spring (42).
2, movement mechanism of cam type pipe robot according to claim 1, it is characterized in that: described driving mechanism (2) comprises drive motor (21), ball screw (22), feed screw nut (23) and three drive link (24), described drive motor (21) is fixed on the cylinder stent (1), described ball screw (22) and the coaxial setting of cylinder stent (1), and the one end links to each other with the output terminal of drive motor (21), described feed screw nut (23) is set on the ball screw (22), rocking bar (31) in each drive link (24) one end and the parallelogram fourbar linkage (3) is hinged, and the other end and feed screw nut (23) are hinged.
3, movement mechanism of cam type pipe robot according to claim 2 is characterized in that: described ball screw (22) cooperates with the reverse self-locking of feed screw nut (23).
4, according to claim 1 or 2 or 3 described movement mechanism of cam type pipe robot, it is characterized in that: described connecting rod (32) is parallel with the central axis of cylinder stent (1), cylinder stent (1) is provided with three and is used for the ccontaining containing groove (11) that is in the parallelogram fourbar linkage (3) of rounding state, three containing grooves (11) arrange equidistantly that along the circumferential direction the rocking bar (31) of each parallelogram fourbar linkage (3) is articulated in the containing groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202108792U CN201306579Y (en) | 2008-12-11 | 2008-12-11 | A cam-type pipeline robot motion mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202108792U CN201306579Y (en) | 2008-12-11 | 2008-12-11 | A cam-type pipeline robot motion mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN201306579Y true CN201306579Y (en) | 2009-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202108792U Expired - Lifetime CN201306579Y (en) | 2008-12-11 | 2008-12-11 | A cam-type pipeline robot motion mechanism |
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| Country | Link |
|---|---|
| CN (1) | CN201306579Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305333A (en) * | 2011-09-05 | 2012-01-04 | 北京华巍中兴电气有限公司 | Six-freedom-degree pipeline robot |
| CN102425709A (en) * | 2011-12-02 | 2012-04-25 | 中国石油大学(北京) | Travelling mechanism of pipeline robot |
| CN108217543A (en) * | 2018-02-24 | 2018-06-29 | 华北理工大学 | A kind of spherical tank inside processing stage apparatus and movement technique |
-
2008
- 2008-12-11 CN CNU2008202108792U patent/CN201306579Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305333A (en) * | 2011-09-05 | 2012-01-04 | 北京华巍中兴电气有限公司 | Six-freedom-degree pipeline robot |
| CN102305333B (en) * | 2011-09-05 | 2013-01-23 | 北京华巍中兴电气有限公司 | Six-freedom-degree pipeline robot |
| CN102425709A (en) * | 2011-12-02 | 2012-04-25 | 中国石油大学(北京) | Travelling mechanism of pipeline robot |
| CN102425709B (en) * | 2011-12-02 | 2013-04-03 | 中国石油大学(北京) | Travelling mechanism of pipeline robot |
| CN108217543A (en) * | 2018-02-24 | 2018-06-29 | 华北理工大学 | A kind of spherical tank inside processing stage apparatus and movement technique |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090909 Effective date of abandoning: 20081211 |