CN204109624U - A kind of cam mechanism research apparatus - Google Patents
A kind of cam mechanism research apparatus Download PDFInfo
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- CN204109624U CN204109624U CN201420378143.1U CN201420378143U CN204109624U CN 204109624 U CN204109624 U CN 204109624U CN 201420378143 U CN201420378143 U CN 201420378143U CN 204109624 U CN204109624 U CN 204109624U
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Abstract
The utility model discloses a kind of cam mechanism research apparatus, upper rack is provided with push rod base plate, push rod base plate is by upper polished rod, lower polished rod is connected with frame, push rod base plate is provided with the 3rd straight-tooth wheels and push-rod assembly, the driving gear of the 3rd straight-tooth wheels is by the second driving stepper motor, push-rod assembly runs through the driven gear of the 3rd straight-tooth wheels by sleeve, the bottom of push-rod assembly arranges paintbrush parts chassis, line array CCD is connected with paintbrush chassis by line array CCD installing plate, line array CCD is corresponding with white strap, paintbrush parts chassis vertically arranges mounting rod, mounting rod end arranges paintbrush chassis, paintbrush chassis is provided with the slide block of Band clamp, clip clamps paintbrush, and make paintbrush contact the second disk or cylindrical drum, steering wheel on paintbrush chassis is connected with slide block by toggle.The utility model can the principle of comprehensive and accurate demonstration cam mechanism, brings a kind of well instrument to the teaching of cam mechanism.
Description
Technical field
The utility model relates to technical field of teaching instruments, is specially a kind of cam mechanism research apparatus.
Background technology
Cam mechanism is one of mechanism common in Machine Design.Because cam mechanism has, indexing accuracy is high, high speed performance good, smooth running, transmission torque are large, self-locking during location, compact conformation, volume is little, noise is low, life-span length waits remarkable advantage, therefore cam mechanism is at various machinery, particularly in automatic machine and automaton, be widely used.The higher pair mechanism that cam mechanism is made up of cam, driven member and frame three basic building blocks.Cam is a component with curved profile, is generally driving link and does constant velocity rotation; The component contacted with cam contour generally does reciprocating linear motion or swings, and is called driven member, and common form is push rod and fork.The design of cam profile curve, generally can be divided into diagram method and analytic method.Utilize diagram method can draw out the contour curve of various plane cam more easily, but this method is only applicable to fairly simple structure, labyrinth is designed then more difficult with it, and utilize diagram method to carry out structural design, constructional error is comparatively large, and the structure high to some required precisions can not meet design requirement.Analytic method can according to designing requirement, by the geometrical relationship in derivation mechanism between each several part, set up corresponding equation, accurately calculate the coordinate of each point on outline line, then the contour curve of cam is accurately drawn out, but, when follower motion more complicated, utilize the workload of the contour curve of analytic method acquisition cam larger.Along with mechanical integrated experimental system is released and constantly application, the analytic method analysis of cam mechanism motion is more and more higher.
In the teaching process of current university mechanical major course, the teaching of cam mechanism is mainly given lessons based on theory, and because the content of cam portion is various, content abstraction, uninteresting, teaching difficulty is large." reversal process " in conventional diagram method asks the outline line of cam by the characteristics of motion of driven member." reversal process " principle is a kind of basic skills of mechanism design and analysis of mechanism.No matter the general principle of cam profile method for designing is adopt mapping solution or Analytical Design cam profile curve, the general principle of institute's foundation is all reversal process, reversal process is according to relative motion principle, utilize the movement locus of driven member, the delivery rules of kinematic pair, backwards calculation goes out the method for the molded line of cam, the method weak point runs counter to visual thinking, complicated hard to understand, is the large difficult point in teaching.
Owing to lacking simple and easy effective " cam mechanism " instruments used for education, student is difficult to intuitively effectively go to understand this structure of study, and existing cam instruments used for education exist following problem:
(1), the relevant instruments used for education of multiple cam mechanism dynamic test experimental bench that adopt of prior art, floor space is comparatively large, is not easy to place giving lessons in classroom, is more not easy to teacher and carries;
(2), existing mechanical course teaching equipment is take computer as the virtual demonstration equipment of platform mostly, lacks intuitive;
(3), the rare teaching equipment equipment being directed to " cam " this typical machine structural design specially;
(4), existing cam demonstrator, the fixed displacement curve that is given is only provided, then cam contour analysis is carried out to it, different, multiple displacement curve can not be studied.
Utility model content
The purpose of this utility model is to provide a kind of cam mechanism research apparatus, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of cam mechanism research apparatus, comprise by chassis, left column, the frame of right column composition, frame lower is provided with the first power transmission shaft, second driving shaft and the 3rd power transmission shaft, 3rd power transmission shaft two ends are supported by the first supporting seat on chassis and the second supporting seat respectively, first power transmission shaft two ends are respectively equipped with the first straight-tooth wheels and the second straight-tooth wheels, first straight-tooth wheels are by the first driving stepper motor, in second straight-tooth wheels, the first driven spur gear is connected with the first conical gear group by second driving shaft, in second straight-tooth wheels, the second driven spur gear is connected with the first orthogonal gear group with the second conical gear group respectively by the 3rd power transmission shaft, 3rd power transmission shaft runs through the second driven gear and the second conical gear group and the first orthogonal gear group lay respectively at the 3rd power transmission shaft two ends, driving gear and the 3rd power transmission shaft of the first orthogonal gear group are coaxially installed, the driven gear of the first orthogonal gear group is positioned at above the 3rd power transmission shaft, and the axis vertical take-off of the center line of the driven gear of the first orthogonal gear group and the 3rd power transmission shaft, the driven gear of the first orthogonal gear group is arranged in the second rotating shaft, the outside of the second rotating shaft is fixed with the second disk, the driven gear of the first conical gear group arranges on V belt translation driving shaft, and V belt translation driving shaft is connected with V belt translation driven shaft by white strap, and described white strap is positioned at the middle part of frame, the driven gear of the second conical gear group is arranged in the first rotating shaft, and the first disk is installed in the first rotating shaft upper end, and the first disk arranges cylindrical drum, and the cylindrical drum on described white strap and the first disk or the second disk rotated with the cycle,
Upper rack is provided with push rod base plate, push rod base plate is by upper polished rod, lower polished rod is connected with frame, push rod base plate is provided with the 3rd straight-tooth wheels and push rod, the driving gear of the 3rd straight-tooth wheels is by the second driving stepper motor, push rod runs through the driven gear of the 3rd straight-tooth wheels by sleeve, push rod is welded by the screw mandrel on top and the square pole of bottom, square pole is by the connection parallel with linear bearing of linear bearing slide block, linear bearing rotates for the circumference retraining screw mandrel, there is sleeve at the driven pulley center of the 3rd spur gear, hub internal bore has the internal thread engaged with screw mandrel, because linear bearing forms relative motion to the constraint that the circumference of push rod is rotated, thus the 3rd spur gear gyration is transmitted as push rod moves up and down.
The bottom of square pole arranges paintbrush parts chassis, line array CCD is connected with paintbrush chassis by line array CCD installing plate, line array CCD carries out vision and follows the tracks of the white strap upper curve data of reading, and obtain the position of curve, then control system is sent the data to, paintbrush parts chassis vertically arranges mounting rod, mounting rod end arranges paintbrush chassis, paintbrush chassis is provided with the slide block of Band clamp, clip clamps paintbrush, slide block to be connected with steering wheel by toggle and to form slider-crank mechanism, realize paintbrush and contact the second disk or cylindrical drum, or back and forth print profile envelope at the second disk or cylindrical drum.
In the utility model white strap and and the first disk on cylindrical drum or the second disk rotate with the cycle, on white strap, operator can use the displacement curve of conventional oil stroke cam, line array CCD carries out vision and follows the tracks of the white strap upper curve position data of reading, then control system is sent the data to, control system controls the second stepper motor and drives line array CCD installing plate upwards or move down by push-rod assembly, thus makes the vertical position of push rod follow the tracks of white strap top offset curve all the time and move up and down.Due to the cylindrical drum on the first disk or the uniform rotation of the second disk and the formation relative motion that moves up and down of push rod, make cam profile curve drawn by the cylindrical drum of paintbrush on the first disk or the second disk; In like manner, after line array CCD and paintbrush reversing of position, the utility model can detect the cam contour of preanalysis, by the seizure of line array CCD, transfer signals to the control system of single-chip microcomputer, and then control the second stepping driven by motor push-rod assembly moves up and down to follow the tracks of cam profile curve, finally draws out corresponding cam displacement curve on white strap.
Preferably, the conical gear of the first conical gear group, the second conical gear group is 45 ° of conical gears, and the orthogonal gear of the first orthogonal gear group is 45 ° of orthogonal gear.
Preferably, V belt translation driving shaft, V belt translation driven shaft are all provided with sleeve, white strap is arranged on sleeve, do not relatively rotate between sleeve and V belt translation driving shaft, can relatively rotate between sleeve and V belt translation driven shaft, and the position between V belt translation driving shaft and V belt translation driven shaft can regulate.
Preferably, mounting rod is movably arranged on paintbrush parts chassis by screw thread, and regulates the spacing between paintbrush chassis and paintbrush parts chassis by mounting rod.
Preferably, the gearratio of the first straight-tooth wheels is 1:2, the gearratio of the second straight-tooth wheels transmission the 3rd power transmission shaft is 1:3, the gearratio of the second straight-tooth wheels transmission second driving shaft is 1:1, the gearratio of the first conical gear group is 3:1, the gearratio of the second conical gear group is 1:1, and the gearratio of the first orthogonal gear group is 1:1.
Preferably, the diameter of V belt translation driving shaft, V belt translation driven shaft is D, and white strap overall length is the centre-to-centre spacing of L=9 π D, V belt translation driving shaft, V belt translation driven shaft
.
Preferably, described cam mechanism research apparatus configures three kinds of paintbrushes, the oil pike of tip when drawing top cam, when drawing flat push cam by special straight line nib, when drawing roller cam by annular nib.
The utility model is applied to the profile design of dissimilar cam, camming movement inspection, camming movement dynamic analysis in mechanical principle teaching, and the research such as cam contour distortion phenomenon.
Operator can go out arbitrary cam displacement curve with common oil pike Freehandhand-drawing on white strap, first stepper motor makes cylindrical drum on the first disk or the second disk uniform rotation by vehicle chassis component transmission, makes the cylindrical drum on white strap and the first disk or the second disk synchronous axial system simultaneously.Simultaneously, line array CCD carries out vision and follows the tracks of the white strap upper curve position data of reading, then control system is sent the data to, control system controls the second stepper motor and drives line array CCD installing plate upwards or move down by push-rod assembly, thus makes the vertical position of push rod follow the tracks of white strap top offset curve all the time and move up and down.Tip oil pike on push rod contacts cylindrical drum on the first disk or the second disk, due to the rotation formation relative motion moved up and down with the cylindrical drum on the first disk or the second disk of the oil pike on push rod, after white strap rotates one-period, namely, after the cylindrical drum on the first disk or the second disk rotational one-period, contour curve corresponding to white strap overhead cam displacement curve just drawn out by the cylindrical drum on the first disk or the second disk.
After line array CCD and oil pike reversing of position, can by detecting the cam contour preparing to analyze, by the seizure of line array CCD, transfer signals to the control system of single-chip microcomputer, and then control step driven by motor push rod moves up and down to follow the tracks of cam contour, finally draw out corresponding cam displacement curve, thus realize the detection of cam.
In the utility model, paintbrush has Three models to change.There are three kinds of duties in paintbrush mechanism:
A, when pen point replacement is tip paintbrush, when now steering wheel and crank block maintain static, and make paintbrush contact cylindrical drum on the first disk or the second disk, the outline line that can realize top push cam is drawn;
B, when pen point replacement be straight line nib paintbrush, make steering wheel drive crank block move back and forth, make straight line nib back and forth print on the second disk, the drafting of flat push cam envelope can be realized.
C, when pen point replacement be annular nib time, now make steering wheel drive crank block move back and forth, make circle nib back and forth print on the second disk, the drafting of roller tappet cam envelope can be realized.
When using line array CCD to gather cam displacement Drawing of Curve cam profile curve, by the combination of the cylindrical drum on three kinds of written patterns and the first disk, the second disk, the drafting of top push rod disk cam outline line, top push rod cylindrical cam contour line, flat push rod disk cam envelope, roller tappet cam envelope can be completed;
When using line array CCD to gather cam profile curve drafting cam displacement curve, the drafting of top push rod disk cam displacement curve, top push rod cylindrical cam displacement curve can be drawn.
Push rod chassis is mounted on polished rod and lower polished rod, and push rod chassis can move left and right in the horizontal direction, and then can realize push rod and the second disk to the heart and eccentric situation; And have scale on upper polished rod, and then the eccentric throw of concrete disk cam can be set.Mounting rod on paintbrush chassis is the part of helicitic texture, and it highly can regulate, and then can realize the adjustment that varies in size to radius of cam base-circle.By to cam basic parameter, i.e. the setting of base radius and eccentric throw, can analyze the distortion situation of same cam displacement curve under different base radius and eccentric throw.
The utility model adopts the motion of Single-chip Controlling push-rod electric machine, single-chip microcomputer is when controlling, record out the rotational angle of the second stepper motor simultaneously, according to the functional relation of the angle of electric machine rotation and the position of push rod, namely the position data of push rod can be drawn, the position data group of the cam utilizing these to obtain, host computer is sent to by serial ports, utilizing the method for numerical analysis, obtain the speed data group of camming movement, with acceleration information group, and corresponding image can be drawn out, realize the dynamic analysis of camming movement.
The utility model has following innovative point:
(1), there is height operability, even free-handly can draw push rod displacement curve and can make corresponding cam profile curve;
(2) mechanism, in the middle of works has high flexibility and composability, can be realized the research of different cam mechanism by different combinations;
(3), mechanical flexibility be convenient to regulate, can cross and realize multiple function, almost contain all cam parameters;
(4), the algorithm of stand-alone development;
(5), electromechanical integration technology is applied;
The utility model has good interactive, is embodied in the following aspects:
Each classmate oneself arbitrarily can draw a cam displacement curve, and the utility model according to the Drawing of Curve cam contour drawn, can have good operability, and complete the drafting of cam miscellaneous, bring classmates and experience more intuitively;
By interaction, the learning interest of classmates can be promoted well, be convenient to classmates and acquire more knowledge with the mood of happiness.The utility model is different from the conventional cam design philosophy of reversal process design cam, utilizes electromechanical integration technology, may be used on mechanical principle teaching classroom researchs such as Design of Cam Profiles and cam bye distortion phenomenons.Works contribute to student and understand theory of mechanics, help student to carry out mechanism design and emulation, make mechanical classroom become vivid and interesting, make rote teaching become more directly perceived, improve efficiency of teaching.
The utility model is for the shortcoming in rote teaching, Design of Cam Profiles being adopted to loaded down with trivial details, abstract tradition " reversal process ", and the deficiency of existing cam teaching research instrument; The cam type that the utility model draws cam profile curve or cam contour envelope according to displacement curve has: the top push cam of disk, disc roller push cam, the dull and stereotyped push cam of disk, the top push cam of cylinder, and above-mentioned various cam to the heart and eccentric situation; The cam type that the utility model draws displacement curve according to the profile of cam has: the top push cam of disk, the top push cam of cylinder, and above-mentioned various cam to the heart and eccentric situation.The utility model also has the analysis of displacement curve and contour curve, camming movement dynamic analysis, camming movement are checked and cam contour distortion phenomenon, and the displacement curve realizing cam can any given, cam basic parameter can be arranged, can the principle of comprehensive and accurate demonstration cam mechanism, bring a kind of well instrument to the teaching of cam mechanism.
Accompanying drawing explanation
Fig. 1 is assembly structure schematic diagram of the present utility model.
Fig. 2 is the plan structure schematic diagram of the utility model chassis gearing mechanism.
Fig. 3 is the drive mechanism schematic diagram of the utility model first orthogonal gear group.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the drive mechanism schematic diagram of the utility model second conical gear group.
Fig. 6 is the drive mechanism schematic diagram of the utility model white strap.
Fig. 7 is the structural representation of the utility model push rod base plate.
Fig. 8 is the syndeton schematic diagram between the utility model push rod and Linear bearing guide rail.
Fig. 9 is the structural representation on the utility model paintbrush parts chassis.
Figure 10 be in Fig. 9 slider-crank mechanism upward view.
Figure 11 is the structural representation of the tip paintbrush that the utility model adopts.
Figure 12 is the structural representation of the straight line nib paintbrush that the utility model adopts.
Figure 13 is the structural representation of the annular nib paintbrush that the utility model adopts.
In figure: the first active spur gear 1, first driven spur gear 2, second driven spur gear 3, second active spur gear 4, first active conical gear 5, first driven bevel gear 6, second driven spur gear 7, second active conical gear 8, second driven bevel gear 9, first active orthogonal gear 10, first driven orthogonal gear 11, first stepper motor 12, second driving shaft 13, first power transmission shaft 14, 3rd power transmission shaft 15, V belt translation driving shaft 16, V belt translation driven shaft sleeve 17, V belt translation driven shaft 18, white strap 19, first disk 20, first rotating shaft 21, second rotating shaft 22, second disk 23, cylindrical drum 24, second stepper motor 25, 3rd active spur gear 26, push rod 27, 3rd driven spur gear 28, paintbrush parts chassis 29, line array CCD 30, line array CCD installing plate 31, steering wheel 32, crank 33, connecting rod 34, the slide block 35 of Band clamp, paintbrush 36, mounting rod 37, paintbrush chassis 38, upper polished rod 39, lower polished rod 40, push rod base plate 41, left column 42, right column 43, chassis 44, first supporting seat 45, second supporting seat 46, Linear bearing guide rail 47, linear bearing 48 with fixed block, screw mandrel sleeve 49.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
With reference to Fig. 1 ~ 10, the utility model proposes a kind of cam mechanism research apparatus, comprise by chassis 44, left column 42, the frame that right column 43 forms, frame lower is provided with the first power transmission shaft 14, second driving shaft 13 and the 3rd power transmission shaft 15, 3rd power transmission shaft 15 two ends are supported by the first supporting seat 45 on chassis 44 and the second supporting seat 46 respectively, first power transmission shaft 14 two ends are respectively equipped with the first straight-tooth wheels and the second straight-tooth wheels, first straight-tooth wheels are driven by the first stepper motor 12, in second straight-tooth wheels, the first driven spur gear 2 is connected by second driving shaft 13 and the first conical gear group phase 5, in second straight-tooth wheels, the second driven spur gear 3 is connected with the first orthogonal gear group with the second conical gear group respectively by the 3rd power transmission shaft 15, 3rd power transmission shaft 15 runs through the second driven gear 3 and the second conical gear group and the first orthogonal gear group lay respectively at the 3rd power transmission shaft 15 two ends, first active orthogonal gear 10 and the 3rd power transmission shaft 15 are coaxially installed, first driven orthogonal gear 11 is positioned at 15 sides on the 3rd power transmission shaft, and the center line of the first driven orthogonal gear 11 and the axis vertical take-off of the 3rd power transmission shaft 15, first driven orthogonal gear 11 is arranged in the second rotating shaft 22, the outside of the second rotating shaft 22 is fixed with the second disk 23, the driven gear of the first conical gear group arranges on V belt translation driving shaft 16, and V belt translation driving shaft 16 is connected with V belt translation driven shaft 18 by white strap 19, and described white strap 19 is positioned at the middle part of frame, the driven gear of the second conical gear group is arranged in the first rotating shaft 21, and the first rotating shaft 21 upper end coaxially fixedly mounts coaxial fixed installation cylindrical drum 24 on the first disk 20, first disk 20,
Upper rack is provided with push rod base plate 41, push rod base plate 41 is by upper polished rod 39, lower polished rod 40 is connected with frame, push rod base plate 41 is provided with the 3rd straight-tooth wheels and push rod 27, 3rd active spur gear 26 is driven by the second stepper motor 25, push rod 27 runs through the 3rd driven spur gear 28 by screw mandrel sleeve 49, push rod 27 is welded by the screw mandrel on top and the square pole of bottom, square pole is by the connection parallel with linear bearing of linear bearing slide block, linear bearing rotates for the circumference retraining screw mandrel, there is sleeve at the driven pulley center of the 3rd spur gear, hub internal bore has the internal thread engaged with screw mandrel, because linear bearing forms relative motion to the constraint that the circumference of push rod is rotated, thus the 3rd spur gear gyration is transmitted as push rod moves up and down.
The bottom of square pole arranges paintbrush parts chassis 29, line array CCD 30 is connected with paintbrush chassis by line array CCD installing plate 31, line array CCD 30 is corresponding with white strap 19, paintbrush parts chassis 29 vertically arranges mounting rod 37, mounting rod 37 end arranges paintbrush chassis 29, and paintbrush chassis 29 is provided with the slide block 35 of Band clamp, clip clamps paintbrush 36, and making paintbrush 36 contact the second disk 23 or cylindrical drum 24, the steering wheel 32 on paintbrush chassis 29 is connected with slide block by crank 33, connecting rod 34 mechanism.
Wherein the conical gear of the first conical gear group, the second conical gear group is 45 ° of conical gears, and the orthogonal gear of the first orthogonal gear group is 45 ° of orthogonal gear.
With reference to Fig. 2 ~ 6, the same periodic motion of the first disk 20, second disk 23.The disk rotational one of disk cam encloses, and the cylindrical drum 24 of cylindrical cam also will rotate a circle, and the white strap 19 simultaneously installing the tape handler of white strap 19 also will rotate a circle, and is all that at the uniform velocity synchronous allocation and transportation are dynamic.Type of drive is that the implementation with periodic motion is the transmission of gear, and in addition, owing to considering the problem of V belt translation tensile force, the centre-to-centre spacing of V belt translation can regulate in certain scope with driving stepper motor.V belt translation driving shaft 16 runs through the first driven bevel gear 6, and V belt translation driving shaft 16 upper part is sleeve, and does not relatively rotate between sleeve and axle; Can relatively rotate between sleeve and V belt translation driven shaft 18, and friction is very little.Position between V belt translation driving shaft 16 and V belt translation driven shaft 18 can regulate, thus realizes white strap drive centre distancc and can regulate.The gearratio of the first straight-tooth wheels is 1:2, the gearratio of the second straight-tooth wheels transmission the 3rd power transmission shaft is 1:3, the gearratio of the second straight-tooth wheels transmission second driving shaft is 1:1, the gearratio of the first conical gear group is 3:1, the gearratio of the second conical gear group is 1:1, and the gearratio of the first orthogonal gear group is 1:1.The diameter D=60mm of V belt translation driving shaft, V belt translation driven shaft, white strap overall length is the centre-to-centre spacing of L=9 π D=1696.5mm, V belt translation driving shaft, V belt translation driven shaft
=754.00mm.
Drive the 3rd active spur gear 26 to rotate with reference to Fig. 7-8, the second stepper motor 25, thus the 3rd driven spur gear 28 rotates, the 3rd driven spur gear 28 center fixed installation screw mandrel sleeve 49, sleeve hole has internal thread to engage with the screw mandrel on push rod 27 top.Push rod 27 is weldment, and its upper part is standard thread drive lead screw, and lower part is square bar, passes through welding fabrication.Push rod bottom square bar and Linear bearing guide rail 47 pass through the connection of slide block 48, as shown in Figure 8, Linear bearing guide rail 47 maintains static, thus the circumference of constraint push rod 27 is rotated, and the linear bearing 48 with slide block can slide up and down on Linear bearing guide rail 47, therefore axis bearing guide moves up and down less than constraint to push rod 27.3rd driven spur gear 28 rotates, screw mandrel sleeve 49 is driven to rotate, due to the internal thread of hub internal bore and the screw mandrel engagement on push rod top, form screw-driven, but because push rod circumferential direction is restrained, and then realize moving up and down of push rod, be namely the rectilinear motion up and down of push rod 27 the circular motion transmission of the 3rd driven spur gear.
With reference to Fig. 9-10, the function that paintbrush parts realize is: the first, installs line array CCD; Second: paintbrush is installed, make paintbrush contact disk or cylindrical drum, its straight line also can be made to move back and forth; Paintbrush straight reciprocating motion; Type of drive is steering wheel; Take steering wheel as actuator, connecting crank 33, connecting rod 34, and slide block 35 forms slider-crank mechanism realization rectilinear motion back and forth.When paintbrush 36 is fixedly touched disk or cylindrical drum by needs, steering wheel turns to suitable angle and then maintains static; When needs back and forth rectilinear motion time, steering wheel rotates in certain angular range.In addition, mounting rod is threaded rod, can move up and down the position height regulating paintbrush.
In the utility model, paintbrush has Three models to change.There are three kinds of duties in paintbrush mechanism:
With reference to Figure 11, when pen point replacement is tip paintbrush, when now steering wheel and crank block maintain static, and make paintbrush contact cylindrical drum on the first disk or the second disk, the outline line that can realize top push cam is drawn;
With reference to Figure 12, when pen point replacement is straight line nib paintbrush, make steering wheel drive crank block to move back and forth, straight line nib is back and forth printed on the second disk, the drafting of flat push cam envelope can be realized.
With reference to Figure 13, when pen point replacement is annular nib, now make steering wheel drive crank block to move back and forth, circle nib is back and forth printed on the second disk, the drafting of roller tappet cam envelope can be realized.
Frame of the present utility model is also provided with control system, and control system is made up of two pieces of single-chip microcomputers: be 8051 and xs128 respectively; 8051 move for the steering wheel 32 of the rotation and pusher section that control the first stepper motor 12; Xs128 for collecting line array CCD data, and controls the rotation of the second stepper motor in real time.
Control procedure of the present utility model is: the control of the first stepper motor, the control of the second stepper motor, the control of steering wheel are independently; First stepper motor realizes uniform rotation, and its speed can regulate; Steering wheel realizes some Angle Position and fixes and carry out back rotation in an angular region.The information processing of pusher section and control: line array CCD gathering line bar data, then these data are sent to xs128, xs128 calculates the position of these lines, then the second stepper motor of pusher section is driven according to algorithm, make line array CCD on push rod all the time can track line, realize vision and follow the tracks of.
In concrete enforcement, a white strap goes out with black oil stroke the displacement curve of the cam of Water demand, this displacement curve can be arbitrary, also can be according to certain formula or the characteristics of motion, then on the V belt translation driving shaft this white strap being installed to instrument and V belt translation driven shaft, then line array CCD starts to read white strap upper curve data, obtain the position of curve, then data are sent to control centre, control centre sends signal and controls the second stepper motor unlatching, push rod 27 is driven to move up and down, and then line array CCD installing plate upwards or move down, line array CCD installing plate is on mounting rod, namely mounting rod 37 moves up or down, line array CCD 30 also moves up or down, make curve on calico just at the point midway of line array CCD, then, open the first stepper motor, by the 3rd straight-tooth wheels transmission, white strap and the first disk start to rotate, line array CCD is also in the position data of automatically real-time reading white strap upper curve simultaneously, then Real Time Drive second stepper motor, carry out vision tracking, make displacement curve all the time at the mid point of line array CCD, thus realize push rod and follow displacement curve and move up and down.
The utility model is applied in mechanical principle teaching researchs such as the profile design of dissimilar cam, camming movement inspection, camming movement dynamic analysis, camming movement emulation and cam contour distortion phenomenons.
The profile design of cam: operator can draw arbitrary cam displacement curve at displacement curve white strap left-hand seat, by the seizure of line array CCD, transfer signals to the control system of single-chip microcomputer, and then the motion of control step driven by motor push rod, make the displacement curve of push rod real-time tracking cam instrument, finally draw out corresponding cam profile curve.
In order to obtain flat push cam, be with the outline line of the push cam of roller etc., different nib can be devised, have medium-sized, circular ring-type, linear.Use circular ring-type nib to complete the profiled envelope line design of roller tappet cam, use linear pattern nib to complete the design of flat push cam profiled envelope line.When drawing envelope, the steering wheel on paintbrush base plate rotates, and has the rectilinear motion that crank block is formed, can reciprocally print on the second cylinder and disk, when print frequency in one-period reaches a timing, is just similar to and forms envelope.
Camming movement inspection and emulation: after line array CCD and paintbrush reversing of position, can by detecting the cam contour designed, by the seizure of line array CCD, transfer signals to the control system of single-chip microcomputer, and then the motion of control step driven by motor push rod, finally draw out corresponding cam displacement curve, thus realize the detection of cam.
Camming movement dynamic analysis: the motion adopting Single-chip Controlling second stepper motor, record out the rotational angle of the second stepper motor, the angle of the second stepping electric machine rotation and the position of push rod have functional relation, so the position data of push rod can be drawn, utilize the position data group of these available cams, host computer is sent to by serial ports, utilizing the method for numerical analysis, obtain speed data group and the acceleration information group of camming movement, and corresponding functional image can be drawn out, realize the dynamic analysis of camming movement.
Cam contour distortion: as shown in Figure 1, push rod chassis is mounted on polished rod and lower polished rod, and push rod chassis can move left and right in the horizontal direction, and then can realize push rod and the second disk to the heart and eccentric situation.And have scale on upper polished rod, and then the eccentric throw of concrete disk cam can be set.Mounting rod on paintbrush chassis is the part of helicitic texture, and it highly can regulate, and then can realize the adjustment that varies in size to radius of cam base-circle.Realize cam basic parameter by these two kinds of modes, i.e. the setting of base radius and eccentric throw.According to theory of mechanics, the phenomenon of cam distortion when eccentric throw increases and base radius reduces, may be there is.Observe when eccentric throw increases and base radius reduces two kinds of changes, whether distortion phenomenon is had according to the cam contour that same displacement curve designs, namely same displacement curve different designs that is different according to base radius and eccentric throw can go out countless cam contours, but some base radius and eccentric throw can cause distortion.
When the position of mobile putter is above cylindrical drum, the analysis of cylindrical cam can be carried out.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (7)
1. a cam mechanism research apparatus, it is characterized in that: comprise by chassis, left column, the frame of right column composition, frame lower is provided with the first power transmission shaft, second driving shaft and the 3rd power transmission shaft, 3rd power transmission shaft two ends are supported by the first supporting seat on chassis and the second supporting seat respectively, first power transmission shaft two ends are respectively equipped with the first straight-tooth wheels and the second straight-tooth wheels, first straight-tooth wheels are by the first driving stepper motor, in second straight-tooth wheels, the first driven spur gear is connected with the first conical gear group by second driving shaft, in second straight-tooth wheels, the second driven spur gear is connected with the first orthogonal gear group with the second conical gear group respectively by the 3rd power transmission shaft, 3rd power transmission shaft runs through the second driven gear and the second conical gear group and the first orthogonal gear group lay respectively at the 3rd power transmission shaft two ends, driving gear and the 3rd power transmission shaft of the first orthogonal gear group are coaxially installed, the driven gear of the first orthogonal gear group is positioned at above the 3rd power transmission shaft, and the axis vertical take-off of the center line of the driven gear of the first orthogonal gear group and the 3rd power transmission shaft, the driven gear of the first orthogonal gear group is arranged in the second rotating shaft, the outside of the second rotating shaft is fixed with the second disk, the driven gear of the first conical gear group arranges on V belt translation driving shaft, and V belt translation driving shaft is connected with V belt translation driven shaft by white strap, and described white strap is positioned at the middle part of frame, the driven gear of the second conical gear group is arranged in the first rotating shaft, the first disk is installed in first rotating shaft upper end, first disk arranges cylindrical drum, cylindrical drum on described white strap and the first disk or the second disk rotated with the cycle, and the cylindrical drum on the first disk or the second disk can paste replacing blank sheet of paper, for drawing cam profile curve or envelope,
Upper rack is provided with push rod base plate, push rod base plate is by upper polished rod, lower polished rod is connected with frame, push rod base plate is provided with the 3rd straight-tooth wheels and push rod, the driving gear of the 3rd straight-tooth wheels is by the second driving stepper motor, push rod runs through the driven gear of the 3rd straight-tooth wheels by sleeve, push rod is welded by the screw mandrel on top and the square pole of bottom, square pole is by the connection parallel with linear bearing of linear bearing slide block, linear bearing rotates for the circumference retraining screw mandrel, there is sleeve at the driven pulley center of the 3rd spur gear, hub internal bore has the internal thread engaged with screw mandrel, the bottom of square pole arranges paintbrush parts chassis, line array CCD is connected with paintbrush chassis by line array CCD installing plate, line array CCD carries out vision and follows the tracks of the white strap upper curve data of reading, and obtain the position of curve, then control system is sent the data to, then control system controls the second stepper motor, drives the displacement curve that push rod moves up and down on real-time tracking white strap, paintbrush parts chassis vertically arranges mounting rod, mounting rod end arranges paintbrush chassis, paintbrush chassis is provided with the slide block of Band clamp, clip clamps paintbrush, slide block to be connected with steering wheel by toggle and to form slider-crank mechanism, realize paintbrush and contact cylindrical drum on the first disk or the second disk, or cylindrical drum back and forth on the first disk or the second disk print contour curve.
2. cam mechanism research apparatus according to claim 1, is characterized in that: the conical gear of the first conical gear group, the second conical gear group is 45 ° of conical gears, and the orthogonal gear of the first orthogonal gear group is 45 ° of orthogonal gear.
3. cam mechanism research apparatus according to claim 1, it is characterized in that: V belt translation driving shaft, V belt translation driven shaft are all provided with sleeve, white strap is arranged on sleeve, do not relatively rotate between sleeve and V belt translation driving shaft, can relatively rotate between sleeve and V belt translation driven shaft, and the position between V belt translation driving shaft and V belt translation driven shaft can adjust.
4. cam mechanism research apparatus according to claim 1, is characterized in that: mounting rod is movably arranged on paintbrush parts chassis by screw thread, and regulates the spacing between paintbrush chassis and paintbrush parts chassis by mounting rod.
5. cam mechanism research apparatus according to claim 1, it is characterized in that: the gearratio of the first straight-tooth wheels is 1:2, the gearratio of the second straight-tooth wheels transmission the 3rd power transmission shaft is 1:3, the gearratio of the second straight-tooth wheels transmission second driving shaft is 1:1, the gearratio of the first conical gear group is 3:1, the gearratio of the second conical gear group is 1:1, and the gearratio of the first orthogonal gear group is 1:1.
6. cam mechanism research apparatus according to claim 1 or 5, it is characterized in that: the diameter of V belt translation driving shaft, V belt translation driven shaft is D, white strap overall length is the centre-to-centre spacing of L=9 π D, V belt translation driving shaft, V belt translation driven shaft
.
7. described cam mechanism research apparatus according to claim 1, it is characterized in that: described cam mechanism research apparatus configures three kinds of paintbrushes, the oil pike of tip when drawing top push cam, when drawing flat push cam by special straight line nib, when drawing roller tappet cam by annular nib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420378143.1U CN204109624U (en) | 2014-07-09 | 2014-07-09 | A kind of cam mechanism research apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420378143.1U CN204109624U (en) | 2014-07-09 | 2014-07-09 | A kind of cam mechanism research apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN204109624U true CN204109624U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420378143.1U Withdrawn - After Issue CN204109624U (en) | 2014-07-09 | 2014-07-09 | A kind of cam mechanism research apparatus |
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| Country | Link |
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| CN (1) | CN204109624U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070895A (en) * | 2014-07-09 | 2014-10-01 | 陈志昂 | Study instrument of cam mechanism |
| CN105291656A (en) * | 2015-11-04 | 2016-02-03 | 福建省泉州市培元中学 | Curve surveying instrument, drawing method and measuring method |
-
2014
- 2014-07-09 CN CN201420378143.1U patent/CN204109624U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070895A (en) * | 2014-07-09 | 2014-10-01 | 陈志昂 | Study instrument of cam mechanism |
| CN104070895B (en) * | 2014-07-09 | 2017-03-01 | 陈志昂 | A kind of cam mechanism research apparatus |
| CN105291656A (en) * | 2015-11-04 | 2016-02-03 | 福建省泉州市培元中学 | Curve surveying instrument, drawing method and measuring method |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20171114 |