CN101665186B - Workpiece step conveying driving system - Google Patents
Workpiece step conveying driving system Download PDFInfo
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- CN101665186B CN101665186B CN 200910067363 CN200910067363A CN101665186B CN 101665186 B CN101665186 B CN 101665186B CN 200910067363 CN200910067363 CN 200910067363 CN 200910067363 A CN200910067363 A CN 200910067363A CN 101665186 B CN101665186 B CN 101665186B
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Abstract
The invention relates to a workpiece step conveying driving system which can realize a step conveying function, which is applied to the field of workpiece step conveying production in a large automatic production line, can overcome and make up the defects of a prior conveying technology on the multistation, long distance and heavy load conveying capacity, sufficiently ensure the requirements on step precision as well as reliability and stability of running and flexibly control the step working rhythm on site. The system comprises a power-driving part, double rotor clutch devices and a driven part, wherein the power-driving part takes a motor as a power source and can meet the requirements on step rhythm and production efficiency through three-level speed reduction; the driven part can achieve the step driving function, stop accumulated errors and ensure the step precision and the running stability through the function combination of a slider-crank mechanism, a rack and spur gear mechanism and a ratchet-and-pawl mechanism; and the rotor clutch devices realize rigid joint and separation of the driving part and the driven part of the system through double rotors and ensure the requirements on reliable use and precision.
Description
Technical field
The present invention relates to a kind of actuating device of step wise conveying workpieces, be particularly useful for the step wise conveying of workpiece under the long production occasion apart from carrying of multistation heavy lift in the large automatic manufacturing line.
Background technology
In automatic production line, it is one of the most frequently used workpiece mode of movement that step wise is carried.For the actuating device of step wise conveying workpieces, can be divided into the direct motor drive type on the driven force type of drive and the Pneumatic hydraulic power element is driving, can be divided on the driven force connection mode and the clutch function type is arranged and without the clutch function type.Can be according to actual needs in production reality with require to adopt suitable power driven mode and power connection mode realizing specific function, thereby satisfy better reality in producing operationization and the actual demand of orderization action.
At present, the actuating device of known step wise conveying workpieces adopts pneumatic apparatus as propulsion source usually, by rack and pinion drive mechanism and click transmission device, or the unidirectional rotary motion that the straight-line motion of pneumatic apparatus is converted into drive element by free-wheel clutch (unilateral bearing, overriding clutch etc.) to be realizing step function, but said structure only is applied to carry medium and small load or the less demanding production occasion of stepping accuracy usually.In modern large automatic manufacturing line, if one the stepping station is a lot of on the workpiece stepping travel line, when very long the and load conveyor of fed distance is very large, if still select large cylinder diameter cylinder as driving power element by above-mentioned usual manner, not only increase the response time of stepwise operation, affect production efficiency, and when operation is very unstable, very easily produce creeping phenomenon, also can send very large noise, not only uneconomical but also do not meet modern environmental demands.For the step drive mechanism that uses free-wheel clutch, because the load-carrying capacity of one-way clutch element is limited, thereby more can't satisfy large load stepping and carry requirement, and use free-wheel clutch easily to produce accumulated error, can not guarantee the repetitive positioning accuracy that stepping is carried, be only applicable to the less demanding occasion of stepping accuracy.
At present, the actuating device of known step wise conveying workpieces also has and adopts electrical motor as drive source, realize step function by intermittent motion mechanism's (such as Geneva wheel Geneva gear), parallel four-bar linkage or other similar translation mechanism, but owing to be subject to the restriction of structure and bulk specification, and there is not the power clutch function, this type of driver train usually is applied to the continuous stepping of the medium and small load of short range and carries occasion, its stepping beat is changeless, can not adjust in real time and control according to on-the-spot actual needs.
Summary of the invention
The technical problem to be solved in the present invention is, have technical deficiency and the defective of workpiece step drive device on multistation, long distance and large load traffic capacity now in order to overcome and to remedy, the invention provides a kind of Workpiece step conveying driving system, this system can not only realize the stepping conveying of workpiece under multistation, long distance and the large load production occasion, and can fully guarantee stepping accuracy requirement and serviceability and stationarity requirement, also can adjust in real time and the control step work tempo according to on-the-spot actual needs.
The technical solution adopted for the present invention to solve the technical problems is: as propulsion source, through three grades of decelerations, both can satisfy the conveying requirement of the large load of the long distance of multistation with electrical motor, and can satisfy again stepping beat and production efficiency requirement; Adopt reliable separation that two turn key arrangement of clutch realize Workpiece step conveying driving system medium power drive parts and secondary part power and engage, can guarantee the reliability of arrangement of clutch work under the large load conveying of the long distance of the multistation occasion, can avoid accumulated error again, conscientiously guarantee transmission accuracy, also can adjust in real time and the control step work tempo according to on-the-spot actual needs.Adopt slider-crank mechanism, rack and pinion drive mechanism, click transmission device to realize step function, not only stopped the link that accumulated error produces, increased again stepping simultaneously and carried traveling comfort.
The present invention is comprised of power driven part, two turn key arrangement of clutch and secondary part:
The power driven part mainly is comprised of electrical motor, reductor, miniature gears and big gear wheel etc.Take electrical motor as propulsion source, by band transmission, reductor and a pair of gear Meshing Pair, realize three grades of decelerations of power driven part, with stepping beat and the production efficiency requirement of satisfying workpiece; In addition, when the stepping station a lot, when very long the and load conveyor of fed distance is very large, can overcome all unfavorable factors of selecting in the usual way large cylinder diameter cylinder to be brought with electrical motor as propulsion source, as long as select enough motor power (output)s, can satisfy multistation, long distance and large load stepping and carry requirement.
Secondary part is comprised of transmission shaft 1, slider-crank mechanism, pinion and rack, ratchet and pawl arrangement and transmission shaft 2 etc.By function joining and the combination of above each mechanism, can realize that step wise drives function.The drive end of transmission shaft 1 has been installed two turn key arrangement of clutch, and driven end has been installed the eccentric wheel of slider-crank mechanism.Eccentric wheel links to each other with slide block with connecting rod by bearing pin, and slide block can be done linear reciprocating motion along track base.Tooth bar and slide block in the rack and pinion drive mechanism are integrated, and the gear empty set is on transmission shaft 2.Ratchet in the ratchet and pawl arrangement is installed on the gear, is connected for key between ratchet and the transmission shaft 2.When two turn key arrangement of clutch engaged, power made transmission shaft 1 drive the eccentric wheel rotation of driven end by the drive end input of transmission shaft 1.It is a stepping working cycle that eccentric wheel rotates a circle.Eccentric wheel whenever rotates a circle, by connecting rod band movable slider (tooth bar) along the straight line guide rail seat crank motion once, and by rack and pinion drive mechanism the ratchet that is installed on the gear is rotated and reverse, during the ratchet forward and ratchet engagement and drive transmission shaft 2 and turn over certain angle and finish a stepping and carry, ratchet when counter-rotating and ratchet break away from and mesh and finish return, so far finish a stepping working cycle.In each mechanism of secondary part, slider-crank mechanism is to stop accumulated error, guarantees one of important step that stepping accuracy requires and running stability requires.By the motion characteristics of slider-crank mechanism as can be known, eccentric wheel whenever rotates a circle, the positive and negative two direction single direction strokes of slide block (for 2 times of eccentric wheel eccentric throw) and 2 limit of sports record positions all are changeless, therefore pass through the one-to-one relationship of rack-and-gear transmission and click transmission, the rotate and reverse angle and motion starting point and final position of ratchet also are changeless, on transmission link, just stopped like this existence of accumulated error, as long as system's manufacturing errors and the driving error of rack and pinion drive mechanism and click transmission device are controlled in the reasonable scope, can be guaranteed the stepping accuracy requirement.In addition, it is a sinusoidal function that the Velocity-time of slide block movement closes, and its kinematic velocity is time dependent, is the linear velocity component in the horizontal direction of eccentric wheel and connecting rod hinge point, namely
v
t＝vcosφ＝vcosωt
In the formula, v
t-slide block linear velocity;
The linear velocity of v-eccentric wheel and connecting rod hinge point;
The angle that φ-eccentric wheel turns over;
ω-eccentric wheel cireular frequency;
The time of t-slide block movement;
When φ=ω t=0, v
t=0 (slide block movement starting point);
During φ=ω t=pi/2, v
t=v (mid points of two limit of sports record positions of slide block);
During φ=ω t=π, v
t=0 (slide block movement terminal point);
During φ=ω t=3 pi/2, v
t=-v (mid points of two limit of sports record positions of slide block);
During φ=ω t=2 π, v
t=0 (slide block movement starting point);
Hence one can see that, speed was zero when slide block arrived two limit of sports record positions, and speed is maximum when arriving the mid point of two limit of sports record positions, namely when slide block is moved to another limit of sports record position by any limit of sports record position, always when being zero, speed begins to accelerate, speed reaches maxim when arriving the mid point of two limit of sports record positions, and then reduces speed now, and speed reduces to again zero when arriving another end position.Because rack-and-gear transmission and click transmission are the synchromesh transmission, thereby the motion of ratchet driving pawl also meets the above-mentioned motion characteristics of slide block.When ratchet driving pawl main story or reverse return, cireular frequency is zero during beginning, and it is maximum to walk to intermediate angle speed, and cireular frequency reduced to again zero when single stroke finished.Therefore the motion characteristics of slider-crank mechanism had both been stopped accumulated error, had effectively guaranteed again the stationarity of step run.
Two turn key clutch parts are comprised of A end, secondary part, union piece and steering unit.Relying on union piece (two turn key) that A end and secondary part are rigidly connected, is a kind of rigidity arrangement of clutch.A end comprises big gear wheel, middle cover and two plain bearings; Secondary part comprises transmission shaft 1, inner sleeve and overcoat etc.; Union piece is turn key, and turn key comprises job key and embedded key.The job key right-hand member is equipped with the work key lever, and the embedded key right-hand member is equipped with the filling key lever, work key lever and fill key lever and link to each other by arm-tie, so embedded key always follows the job key rotation, but switched in opposite; In apply mechanically flat key and be connected with big gear wheel, its inner rim has four uniform semi-circular groove.Two semi-circular groove are also respectively arranged on the right-hand member of transmission shaft and the inner edge of inside and outside cover, and its diameter is identical with the semi-circular groove diameter of middle cover.The two ends of turn key are cylindrical journal, are supported in the hole that is comprised of transmission shaft and the inside and outside semi-circular groove that puts; The inner edge at turn key middle part cooperates with the semi-circular groove on the transmission shaft, and the outside face of outer rim and transmission shaft right-hand member consists of a full circle.Therefore, the semi-circular groove that puts and the semi-circular groove on the transmission shaft align and when forming a full circle, turn key just can rotate around the axis of oneself, realizes the Engage and disengage of power between A end and the secondary part just in the middle of.Steering unit is handled cylinder, guide holder and closer etc. by clutch and is formed.Clutch manipulation cylinder can drive closer and slide along guide holder.When closer can block tailgate with the route that driven shaft rotates when guide holder stretches out forward, power is broken away from, otherwise when closer was retracted along guide holder, tailgate can rotate to an angle power is engaged under the tension spring tension effect.Therefore, make the closer action by control clutch manipulation cylinder, can control the A end of two turn key arrangement of clutch and the Engage and disengage of secondary part power, reach the purpose according to the in real time control of on-the-spot actual needs and adjustment stepping work tempo.
When the stepper drive load is very large, if adopt in the usual way friction-type or electromagnetic type clutch mode, because of its load-carrying capacity limited, A end and secondary part face of joint place easily produce relative sliding during work, accumulated error when being easy to cause operation, its serviceability is under suspicion, and turn key clutch mode is different from above-mentioned clutch mode, as previously mentioned, it is a kind of rigid engagement formula clutch mode of Purely mechanical, the rigid construction characteristics of itself determine its not only load-carrying capacity be far longer than other on-mechanical formula clutch mode, and when work A end and the secondary part joint do not have relative sliding, only have the accuracy of manufacture of itself can cause certain systematic error, but will not produce accumulated error.As long as accuracy of manufacture is reasonable, systematic error control just can be satisfied operating needs within the specific limits, accomplish relatively easily and reduce systematic error.Therefore adopt two turn key arrangement of clutch of rigidity clutch mode not only to have very strong load-carrying capacity, can satisfy the heavy load requirement of stepper drive, and fundamentally stop the impact that accumulated error causes stepping accuracy, can satisfy the reliability of service requirement fully.
The invention has the beneficial effects as follows, can realize the stepping conveying of workpiece under the long production occasion apart from carrying of multistation heavy lift, and conscientiously guarantee stepping accuracy and serviceability and stationarity requirement, its relative Applicable scope is wider, is particularly useful for multistation, fed distance is long, load conveyor is relatively large and large automatic tinuous production that production automation degree is had relatively high expectations.The Purely mechanical rigidity power-off device clutch of adopting accurately and reliably, convenient and swift, fault rate is extremely low, can adjust in real time and the control step work tempo according to the field activity situation, for the trouble-free operation of large automatic tinuous production provides failure-free technical support and guarantee, existing stepping conveying technology is expanded and perfect, for workpiece stepping transportation art provides a kind of new technological development direction.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the integral structure graph of a relation of the embodiment of the invention.
Fig. 2 is the A--A cutaway view of Fig. 1.
Fig. 3 is the D--D cutaway view of Fig. 2.
Fig. 4 is the E--E cutaway view of Fig. 2.Turn key site plan when wherein separate for power in the left side; Turn key site plan when the right side is the power joint.
Fig. 5 is that the F of Fig. 2 (removing end cap) is to view.When wherein separate for power in the left side, when the right side is the power joint.
Fig. 6 is the B--B cutaway view of Fig. 1.
Fig. 7 is the C--C cutaway view of Fig. 1.
Fig. 8 is that the K of Fig. 7 is to view.
1. electrical motors among the figure, 2. band transmission, 3. reductor, 4. miniature gears, 5. big gear wheel, 6. turn key clutch cylinder, 7. transmission shaft 1,8. eccentric wheel, 9. connecting rod, 10. transmission shaft 2,11. gear, 12. tooth bars, 13. ratchets, 14. ratchets, 15. inner sleeves, 16. plain bearing, cover in 17., 18. overcoats, 19. end caps, 20. embedded keys, 21. the work key lever, 22. draw and pull 23. job keys, 24. tailgates, 25. closers, 26. guide holder, cylinder is handled in 27. clutches, 28. extension springs, and 29. fill key lever, 30. straight line guide rail seats
The specific embodiment
In the embodiment shown in fig. 1, with the power driven part of electrical motor (1) by the Meshing Pair formation Workpiece step conveying driving system of band transmission (2), reductor (3) and miniature gears (4) and big gear wheel (5) composition, realize three grades of decelerations.As drive source, as long as select enough power, both can satisfy the heavy load requirement that stepping is carried with electrical motor, can overcome many unfavorable factors of selecting other action executing element to bring as propulsion source simultaneously; Suitable reduction ratio be can obtain by three grades of decelerations, beat and production efficiency requirement that stepping is carried satisfied.Big gear wheel (5) realizes power Engage and disengage with transmission shaft 1 (7) by the two turn key arrangement of clutch that are installed in its inside, and pass through transmission shaft 1 (7) order driving by eccentric wheel (8), the slider-crank mechanism that connecting rod (9) and tooth bar (12) form, the pinion and rack that is formed by tooth bar (12) and gear (11), the click one-way driving mechanism and the transmission shaft 2 (10) that are formed by ratchet (13) and ratchet (14), by function joining and the combination of above each mechanism, can realize that step wise drives function.
In Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the A end of two turn key arrangement of clutch is comprised of big gear wheel (5), middle cover (17) and two plain bearings (16) etc., and secondary part is comprised of transmission shaft 1 (7), inner sleeve (15) and overcoat (18) etc.The Engage and disengage of power is finished by turn key between A end and the secondary part.Turn key is two turn key, i.e. job key (23) and embedded keys (20).Job key (23) right-hand member is equipped with work key lever (21), embedded key (20) right-hand member is equipped with fills key lever (29), work key lever (21) links to each other by arm-tie (22) with filling key lever (29), therefore embedded key (20) is always followed job key (23) rotation, but switched in opposite; Middle cover (17) is connected with big gear wheel (5) with flat key, and its inner rim has four uniform semi-circular groove.On the inner edge of the right-hand member of transmission shaft 1 (7) and inner sleeve (15), overcoat (18) two semi-circular groove are arranged respectively also, its diameter is identical with the semi-circular groove diameter of middle cover (17).The two ends of turn key are cylinder axis neck, are supported in the hole that is comprised of the semi-circular groove on transmission shaft 1 (7) and inner sleeve (15), the overcoat (18); The inner edge at turn key middle part cooperates with the semi-circular groove on the transmission shaft 1 (7), and the outside face of outer rim and transmission shaft 1 (7) right-hand member consists of a full circle.Therefore, the semi-circular groove on the semi-circular groove on the central cover (17) and the transmission shaft 1 (7) aligns and when forming a full circle, turn key just can rotate around the axis of oneself, realizes the Engage and disengage of power between A end and the secondary part just.Steering unit is handled cylinder (27), guide holder (26) and closer (25) etc. by clutch and is formed.Clutch manipulation cylinder (27) can drive closer (25) and slide along guide holder (26).When closer (25) can block tailgate (24) with the route of driven shaft 1 (7) rotation along guide holder (26) when stretching out forward, power is broken away from, when otherwise closer (25) was retracted along guide holder (26), tailgate (24) can rotate to an angle under extension spring (28) pulling force effect power is engaged.Therefore, handle cylinder (27) by the control clutch and make closer (25) action, can control the A end of two turn key arrangement of clutch and the Engage and disengage of secondary part power, reach the purpose of controlling and adjust flexibly the stepping work tempo according to on-the-spot actual needs.
The below describes the process that the turn key arrangement of clutch is realized the power Engage and disengage in detail.
When the stepping transport condition satisfied, cylinder (27) action was handled in the turn key clutch, and closer (25) is retracted, tailgate (24) together with job key (23) under the effect of extension spring (28) pulling force, the trend of oriented anticlockwise direction rotation.Semi-circular groove on the central cover (17) and the semi-circular groove on the transmission shaft 1 (7) are to timing, job key (23) just turns over an angle (seeing that the E-E among Fig. 4 analyses and observe right figure) to anticlockwise direction at once, make big gear wheel (5) through in the middle part drive transmission shaft 1 (7) of cover (17) and job key (23) to left-hand revolution, finish engaging of A end and secondary part power; After the power joint was finished, cylinder (27) action was handled in the turn key clutch, and closer (25) stretches out again.When transmission shaft 1 (7) drives tailgate (24) when rotating a circle, tailgate (24) is got back to again original position and is closed device (25) and blocks, force tailgate (24) to go back to original position (seeing that the E-E among Fig. 4 analyses and observe left figure) together with job key (23) to clockwise direction, job key (23) and with it the middle part outer rim of the embedded key (20) of interlock consist of a full circle with the outside face of transmission shaft 1 (7) right-hand member again, so transmission shaft 1 (7) breaks away from middle cover (17), big gear wheel (5) idle running, transmission shaft 1 (7) stops operating under the brake equipment effect, so far finishes separating of A end and secondary part power.
In the turn key arrangement of clutch that present embodiment adopts, rely on two turn keys that A end and secondary part are rigidly connected, it is different from the limited contact friction formula of common load-carrying capacity or electromagnetic type clutch mode, it is a kind of rigid engagement formula clutch mode of Purely mechanical, the rigid construction characteristics of itself determine its not only load-carrying capacity be far longer than other on-mechanical formula clutch mode, and power when engaging A end and secondary part joint can not produce relative sliding, therefore can satisfy the heavy load requirement of stepper drive, and fundamentally stopped the impact that accumulated error causes stepping accuracy, can satisfy the reliability of service requirement fully.
In Fig. 6, form slider-crank mechanism by eccentric wheel (8), connecting rod (9) and tooth bar (12), line slideway has been installed in tooth bar (12) bottom, can be along straight line guide rail seat (30) crank motion, and be meshed with gear (11), form rack and-pinion mechanism.
In Fig. 7, gear (11) empty set is equipped with three ratchets (13) on it on transmission shaft 2 (10), but driven in synchronism ratchet (14) single direction rotation; Be connected for key between ratchet (14) and the transmission shaft 2 (10).By rack and-pinion mechanism and click transmission device, the linear reciprocating motion of tooth bar (12) can be converted into the unidirectional rotation of ratchet (14) and transmission shaft 2 (10), realize step function.
In the present embodiment, jointly form the secondary part of Workpiece step conveying driving system by transmission shaft 1 (7), slider-crank mechanism, rack and-pinion mechanism, click transmission device and transmission shaft 2 (10), finish workpiece step wise conveying function.Transmission shaft 1 (7) whenever rotates a circle, the slider-crank mechanism crank motion once, and drive ratchet (13) by rack and pinion drive mechanism and rotate and reverse, during ratchet (13) forward and ratchet (14) engagement and drive transmission shaft 2 (10) and turn over certain angle and finish a stepping and carry, ratchet (13) when counter-rotating and ratchet (14) break away from and mesh and finish return, so far finish once complete stepping working cycle.The slider-crank mechanism that adopts in the present embodiment, the unidirectional rotary motion of transmission shaft 1 (7) can be converted into the linear reciprocating motion of tooth bar (12), motion characteristics according to slider-crank mechanism, the positive and negative two direction single direction strokes of tooth bar (12) (for 2 times of eccentric wheel eccentric throw) and 2 limit of sports record positions all are changeless, the existence of therefore on transmission link, fundamentally having stopped accumulated error, by manufacturing and the driving error of reasonable each parts of control secondary part, can conscientiously guarantee the stepping accuracy requirement.In addition, it is a sinusoidal function that the Velocity-time of tooth bar (12) motion closes, namely when tooth bar (12) moves from a limit of sports record position to another limit of sports record position, always when being zero, speed begins to accelerate, speed reaches maxim when arriving the mid point of two limit of sports record positions, and then reduce speed now, speed reduces to again zero when arriving another end position.This motion characteristics of crank connecting link is applied to can overcome the adverse effect that inertia is stable to step motion and stepping accuracy causes of secondary part driving system in the step wise conveying, has conscientiously ensured the stability requirement of step wise conveying motion.
Claims (1)
1. Workpiece step conveying driving system, formed by power driven part, two turn key arrangement of clutch and the first secondary part, partly drive the first secondary part to realize workpiece stepping feed drive function by power driven, it is characterized in that: the power driven part mainly is comprised of electrical motor, reductor, miniature gears and big gear wheel (5); With electrical motor as propulsion source, by the band transmission, reductor and a pair of large miniature gears Meshing Pair, realize three grades of decelerations of power driven part, both can satisfy the conveying requirement of the large load of the long distance of multistation, can satisfy again stepping beat and production efficiency requirement, described big gear wheel (5) by the two turn key arrangement of clutch that are installed in its inside realize with the power positive engagement of transmission shaft 1 (7) with separate, and by described transmission shaft 1 (7) order driving by eccentric wheel (8), the slider-crank mechanism that connecting rod (9) and tooth bar (12) form, the rack and-pinion mechanism that is formed by tooth bar (12) and gear (11), realize that by click transmission device and transmission shaft 2 (10) that ratchet (13) and ratchet (14) form step wise drives function;
Two turn key arrangement of clutch are comprised of A end, the second secondary part, union piece and steering unit, rely on union piece that A end and the second secondary part are rigidly connected, and are a kind of rigidity arrangement of clutch; A end comprises described big gear wheel (5), middle cover (17) and two plain bearings (16); The second secondary part comprises described transmission shaft 1 (7), inner sleeve (15) and overcoat (18); Union piece is two turn keys, be job key (23) and embedded key (20), job key (23) right-hand member is equipped with work key lever (21), embedded key (20) right-hand member is equipped with fills key lever (29), work key lever (21) links to each other by arm-tie (22) with filling key lever (29), therefore embedded key (20) is always followed job key (23) rotation, but switched in opposite; Middle cover (17) is connected with described big gear wheel (5) with flat key, and its inner rim has four uniform semi-circular groove; On the inner edge of the right-hand member of described transmission shaft 1 (7) and inner sleeve (15), overcoat (18) two semi-circular groove are arranged respectively also, its diameter is identical with the semi-circular groove diameter of middle cover (17); The cylindrical journal at turn key two ends is supported in the hole that is comprised of the semi-circular groove on described transmission shaft 1 (7) and inner sleeve (15), the overcoat (18); The inner edge at turn key middle part cooperates with the semi-circular groove on the described transmission shaft 1 (7), and the outside face of outer rim and described transmission shaft 1 (7) right-hand member consists of a full circle; Therefore, the semi-circular groove that puts and the semi-circular groove on the described transmission shaft 1 (7) align and when forming a full circle, turn key just can rotate around the axis of oneself, realizes the Engage and disengage of power between A end and the second secondary part just in the middle of; Steering unit is handled cylinder (27) by clutch, guide holder (26) and closer (25) form, clutch manipulation cylinder (27) can drive closer (25) and slide along guide holder (26), when closer (25) can block tailgate (24) with the route of described transmission shaft 1 (7) rotation along guide holder (26) when stretching out forward, power is broken away from, when otherwise closer (25) was retracted along guide holder (26), tailgate (24) can rotate to an angle under extension spring (28) pulling force effect power is engaged; Therefore, handle cylinder by the control clutch and make the closer action, can control the A end of two turn key arrangement of clutch and the Engage and disengage of the second secondary part power;
The first secondary part is comprised of described transmission shaft 1 (7), slider-crank mechanism, pinion and rack, ratchet and pawl arrangement and described transmission shaft 2 (10); Slider-crank mechanism is comprised of eccentric wheel (8), connecting rod (9) and tooth bar (12), and the drive end of described transmission shaft 1 (7) has been installed two turn key arrangement of clutch, and driven end has been installed the eccentric wheel of slider-crank mechanism; Eccentric wheel links to each other with slide block with connecting rod by bearing pin, and slide block can be done linear reciprocating motion along track base; Tooth bar and slide block in the rack and-pinion mechanism are integrated, and gear (11) empty set is on described transmission shaft 2 (10); Ratchet in the ratchet and pawl arrangement is installed on the gear, is connected for key between ratchet and the described transmission shaft 2 (10); By rack and-pinion mechanism and click transmission device, the linear reciprocating motion of tooth bar (12) can be converted into the unidirectional rotation of ratchet (14) and described transmission shaft 2 (10), realize step function.
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| CN 200910067363 CN101665186B (en) | 2009-07-31 | 2009-07-31 | Workpiece step conveying driving system |
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