CN110570745A - Automatic generating instrument - Google Patents
Automatic generating instrument Download PDFInfo
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- CN110570745A CN110570745A CN201910863025.7A CN201910863025A CN110570745A CN 110570745 A CN110570745 A CN 110570745A CN 201910863025 A CN201910863025 A CN 201910863025A CN 110570745 A CN110570745 A CN 110570745A
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- cutter
- gear
- shaft
- tray
- transmission
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L11/00—Non-circular-curve-drawing instruments
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
Abstract
The invention provides an automatic generating instrument, which belongs to the technical field of teaching instruments and comprises a main transmission mechanism, a tray and a cutter, wherein the tray is used for placing a paper tray, the cutter is provided with a plurality of teeth, and the outlines of the teeth are projected on the paper tray; the main transmission mechanism comprises a transmission worm, a worm wheel meshed with the transmission worm and a main transmission shaft penetrating through the center of the worm wheel, the transmission worm is externally connected with a power source, one end of the main transmission shaft is connected with the tray in a transmission mode through the tray transmission mechanism, so that the tray rotates by taking the circle center as the center, the other end of the main transmission shaft is connected with the cutter in a transmission mode through the intermittent mechanism and used for enabling the cutter to be pressed downwards to be in contact with the paper tray, and the cutter is further connected with the tray in a transmission mode through the cutter transmission mechanism and used for enabling the cutter to move along the arrangement. The method has the advantages that the function of automatically drawing the tooth profile without manual participation is realized, and the full-automatic drawing of the tooth profile is completed, so that the drawing efficiency is high, the error is small, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of teaching instruments, in particular to an automatic generating instrument.
Background
At present, colleges and universities generally require students to draw gear profiles when giving lessons of gear courses so as to carry out related experimental courses, and the students generally draw the gear profiles manually or draw the gear profiles by using a die-stamping gear generating instrument at present.
However, the two methods have disadvantages, and when the two methods are manually drawn, the drawn outline graph has a large outline error with a standard gear, so that the accuracy of a subsequent experiment is influenced; and the manual drawing operation is complicated, the time consumption is long, and the efficiency of the experiment course is low. The stamping gear generating instrument is used, the problem of large manual drawing errors is solved, but the stamping gear generating instrument is semi-automatic in operation, manual feeding and stamping (gear contour is printed on a paper disc) are needed, and operation is inconvenient.
Disclosure of Invention
The invention aims to provide an automatic generating instrument which can realize the function of automatically drawing a gear outline and improve the drawing precision and efficiency of the gear outline.
The embodiment of the invention is realized by the following steps:
One aspect of the embodiment of the invention provides an automatic generating instrument, which comprises a main transmission mechanism, a tray and a cutter, wherein the tray is used for placing a paper tray, the cutter is provided with a plurality of teeth, and the outlines of the teeth are projected on the paper tray; the main transmission mechanism comprises a transmission worm, a worm wheel meshed with the transmission worm and a main transmission shaft penetrating through the center of the worm wheel, the transmission worm is externally connected with a power source, one end of the main transmission shaft is connected with the tray through a tray transmission mechanism so that the tray rotates around the center of a circle, the other end of the main transmission shaft is connected with the cutter through an intermittent mechanism and used for enabling the cutter to be pressed downwards to be in contact with the paper tray, and the cutter is further connected with the tray through the cutter transmission mechanism and used for enabling the cutter to be arranged along the arrangement direction of the teeth of the cutter.
Optionally, the tray drive mechanism includes breach disc, sheave and ordinary gear train, the breach disc with sheave constitution sheave mechanism, the breach disc with the final drive shaft transmission is connected, the input shaft of ordinary gear train with the sheave transmission is connected, the output shaft of ordinary gear train with the tray transmission is connected.
Optionally, the ordinary gear train includes input shaft, output shaft and jackshaft, the cover is equipped with first gear on the input shaft, the cover is equipped with the second gear on the jackshaft, first gear with the meshing of second gear, the jackshaft endotheca is equipped with the worm, the worm with the ring gear meshing that the cover was established on the output shaft.
Optionally, the cutter drive mechanism includes driving gear, first transition gear and driven gear, the driving gear cover is established on the output shaft of dead axle train, first transition gear respectively with the driving gear with the driven gear meshing, wear to be equipped with the driven shaft on the driven gear, the cover is equipped with fixed gear on the driven shaft, fixed gear through the gear train that shifts with the cutter is connected.
Optionally, the modified gear train includes a second transition gear engaged with the fixed gear and a modified gear engaged with the second transition gear, a tool shaft is inserted through the modified gear, a transition shaft is inserted through the second transition gear, the transition shaft is connected with the driven shaft and the tool shaft through two connecting rods, and the tool shaft is in transmission connection with the tool.
Optionally, a pointer plate is arranged on the tool shaft, a pointer end of the pointer plate points to the graduated scale, the graduated scale is fixed on a box body containing the deflection gear train, and the tool shaft rotates to drive the pointer end to slide on the graduated scale.
Optionally, the intermittent mechanism includes an intermittent shaft, a cam plate and a cam, the cam plate is fixed on the intermittent shaft, the cam is sleeved on the main transmission shaft, and the periphery of the cam abuts against the cam plate.
optionally, the cutter is a strip cutter, teeth on the cutter are arranged in a strip shape to form strip teeth, and the outline of the strip teeth is projected on the paper tray; the cutter is connected with the rack, a cutter gear is sleeved on the cutter shaft, and the cutter gear is meshed with the rack.
Optionally, the cutter is a circular cutter, teeth on the cutter are circumferentially arranged to form gear teeth, the cutter is sleeved on the cutter shaft, and the contour of the gear teeth is projected on the paper tray.
optionally, the tray conveying device further comprises a box body, and the power source, the main transmission mechanism, the tray transmission mechanism and the cam are arranged in the box body.
The embodiment of the invention has the beneficial effects that:
According to the automatic generating instrument provided by the embodiment of the invention, the power of a power source is transmitted to a main transmission shaft through a transmission worm and a worm wheel meshed with the transmission worm, one end of the main transmission shaft is in transmission connection with a tray through a tray transmission mechanism, so that the tray rotates to drive a paper tray on the tray to rotate, and the other end of the main transmission shaft is in transmission connection with a cutter through an intermittent mechanism and is used for enabling the cutter to be pressed down to be in contact with the rotating paper tray, so that the teeth of the cutter can be printed on the paper tray; on the other hand, the cutter is connected with the tray in a transmission mode through the cutter transmission mechanism and is used for enabling the cutter to move along the arrangement direction of the teeth of the cutter, so that the teeth on the cutter can draw the complete tooth profile on the rotating paper tray, the function of automatically drawing the tooth profile is achieved without manual participation, and the full-automatic drawing of the tooth profile is completed, so that the drawing efficiency is high, the error is small, and the operation is convenient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an automatic generating instrument according to an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
fig. 3 is a second schematic structural diagram of an automatic generating instrument according to an embodiment of the present invention;
Fig. 4 is an exploded view of a part of the structure of an automatic generating instrument according to an embodiment of the present invention;
FIG. 5 is a schematic view of a negative deflection of the teeth of the cutter;
FIG. 6 is a schematic view of a positive deflection of the teeth of the cutter;
Fig. 7 is a third schematic structural diagram of an automatic generating instrument according to an embodiment of the present invention;
Fig. 8 is a fourth schematic structural diagram of an automatic generating instrument according to an embodiment of the present invention;
Fig. 9 is a fifth schematic structural diagram of an automatic generating instrument according to an embodiment of the present invention;
Fig. 10 is a sixth schematic structural view of an automatic generating instrument according to an embodiment of the present invention.
10-motor; 11-a sheave; 111-radial slots; 112-concave locking arc; 12-an input shaft; 13-a notched disc; 131-a poke rod; 1311-round pin; 132-outer concave locking arc; 14-a drive worm; 15-a worm gear; 16-a main drive shaft; 17-a cam; 18-a cam plate; 181-intermittent shaft; 19-a driven gear; 20-a driven shaft; 21-fixed gear; 22-a second transition gear; 23-a cutter; 24-a tray; 25-a drive gear; 26-an output shaft; 261-a gear ring; 27-a second gear; 28-intermediate shaft; 281-worm; 29-a first gear; 30-a first transition gear; 31-a graduated scale; 32-modified gears; 33-a connecting rod; 331-step axis; 332-a transition axis; 34-a cutter gear; 341-central axis of cutter gear; 35-pointer plate; 36-a tool shaft; 37-axle; 38-a bearing; 39-a cartridge body; 40-a box body; 401-lower box body; 4011-a trench; 402-loading the box body; 403-drawing box; 45-screws; 46-a nut; 47-a sleeve; 48-a fixed seat; 49-tray seat; 50-a gasket; 51-cylindrical sleeve; 52-a mounting plate; 53-a back-up bearing; 54-rack.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Referring to fig. 1, the present embodiment provides an automatic generating instrument, which is a teaching instrument applied to a mechanical basis test-generating method for processing an involute gear, and is capable of automatically printing a gear profile, and includes a main transmission mechanism, a tray 24 and a cutter 23, wherein the tray 24 is used for placing a paper tray, the cutter 23 is provided with a plurality of teeth, and the profiles of the plurality of teeth are projected on the paper tray.
The main transmission mechanism comprises a transmission worm 14, a worm wheel 15 meshed with the transmission worm 14 and a main transmission shaft 16 penetrating through the center of the worm wheel 15, the transmission worm 14 is externally connected with a power source, one end of the main transmission shaft 16 is in transmission connection with a tray 24 through a tray transmission mechanism so that the tray 24 rotates around a circle center, the other end of the main transmission shaft 16 is in transmission connection with a cutter 23 through an intermittent mechanism and used for enabling the cutter 23 to be pressed downwards to be in contact with the paper tray, and the cutter 23 is also in transmission connection with the tray 24 through the cutter transmission mechanism and used for enabling the cutter 23 to move along the arrangement direction of the teeth of the cutter 23 so as to automatically draw the outline of the teeth on the.
It should be noted that, firstly, the power source provides power for the automatic generation instrument of this embodiment, and the power source may be electric power, pneumatic power, hydraulic power, or the like. In this embodiment, the power source is a motor 10, and an output shaft 26 of the motor 10 is connected to the transmission worm 14 to drive the transmission worm 14 to rotate.
secondly, the main transmission mechanism is used for providing power for the execution mechanism, the execution mechanism of the embodiment is a tray 24 and a cutter 23, a plurality of teeth are arranged on the cutter 23, a paper tray is placed on the tray 24, the outline of the teeth is orthographically projected on the paper tray, and the teeth on the cutter 23 are printed on the paper tray, so that the automatic gear outline printing is completed.
The plurality of teeth on the cutter 23 may be arranged in a line, as a bar of teeth, so that the teeth printed on the paper tray are a row of teeth; the plurality of teeth on the cutter 23 may also be arranged in a circle, so that the teeth printed on the paper tray are a circle of teeth.
Thirdly, the main transmission mechanism comprises a transmission worm 14, a worm wheel 15 and a main transmission shaft 16, the transmission worm 14 is connected with an output shaft of the motor 10, the worm wheel 15 is in meshed transmission with the transmission worm 14, the main transmission shaft 16 penetrates through the center of the worm wheel 15, the worm wheel 15 is in transmission connection with the main transmission shaft 16 through a key, double output of power is formed through the main transmission shaft 16, and the power of the motor 10 is respectively transmitted to the tray 24 and the cutter 23 through the main transmission shaft 16. One end of the main transmission shaft 16 is in transmission connection with the tray 24 through a tray transmission mechanism, so that the tray 24 rotates by taking the circle center of the tray 24 as the center, the other end of the main transmission shaft 16 is in transmission connection with the cutter 23 through an intermittent mechanism and used for enabling the cutter 23 to be pressed down to be in contact with the paper tray, and the cutter 23 is also in transmission connection with the tray 24 through the cutter transmission mechanism and used for enabling the cutter 23 to move along the arrangement direction of the teeth of the cutter 23, so that the braking of the teeth on the paper tray is completed to draw the outline of the teeth.
According to the automatic generating instrument provided by the embodiment of the invention, the power of a power source is transmitted to a main transmission shaft 16 through a transmission worm 14 and a worm wheel 15 meshed with the transmission worm 14, one end of the main transmission shaft 16 is in transmission connection with a tray 24 through a tray transmission mechanism, so that the tray rotates to drive a paper tray on the tray 24 to rotate, and the other end of the main transmission shaft 16 is in transmission connection with a cutter 23 through an intermittent mechanism and is used for enabling the cutter 23 to be pressed down to be in contact with the rotating paper tray, so that the teeth of the cutter 23 can be printed on the paper tray; on the other hand, the cutter 23 is also in transmission connection with the tray 24 through a cutter transmission mechanism, and is used for enabling the cutter 23 to move along the arrangement direction of the teeth of the cutter 23, so that the teeth on the cutter 23 can draw the complete tooth profile on the rotating paper tray, the function of automatically drawing the tooth profile without manual participation is realized, and the full-automatic drawing of the tooth profile is completed, so that the drawing efficiency is high, the error is small, and the operation is convenient.
Specifically, as shown in fig. 3, the tray transmission mechanism includes a notched disc 13, a sheave 11 and an ordinary gear train, the notched disc 13 and the sheave 11 form a sheave mechanism, the notched disc 13 is in transmission connection with the main transmission shaft 16, an input shaft 12 of the ordinary gear train is in transmission connection with the sheave 11, and an output shaft 26 of the ordinary gear train is in transmission connection with the tray 24.
The tray transmission mechanism is used for being in transmission connection with one end of the main transmission shaft 16 and the tray 24, the tray transmission mechanism comprises a notch disc 13, a grooved pulley 11 and a fixed shaft gear train, and the notch disc 13 and the grooved pulley 11 form a grooved pulley mechanism.
The geneva mechanism is a unidirectional intermittent motion mechanism, also known as a maltese mechanism, which is used to convert the continuous rotation of the main drive shaft 16 into unidirectional periodic rotation with dwell.
as shown in fig. 1, the notch disc 13 is connected with the poke rod 131, and when the round pin 1311 at the end of the poke rod 131 does not enter the radial groove 111 of the sheave 11, the sheave 11 is not moved because the concave locking arc 112 of the sheave 11 is caught by the concave locking arc 132 of the notch disc 13. When the round pin 1311 has just entered the position of the radial groove 111 of the sheave 11, the locking arc is just released at this time. Thereafter, the sheave 11 is driven to rotate by the round pin 1311. When the round pin 1311 leaves the radial groove 111 on the other side, the locking arc is again caught and the sheave 11 is still. This movement is repeated until the round pin 1311 again enters the other radial groove 111 of the sheave 11. Therefore, the sheave 11 is intermittently moved while being moved.
By adopting the grooved pulley mechanism, the notch disc 13 rotates for one circle, the grooved pulley 11 rotates for 90 degrees, so that the fixed shaft wheel in transmission connection with the grooved pulley 11 intermittently rotates, and finally the tray 24 intermittently rotates, and the relative friction between the cutter 23 and the paper disc is avoided when the tray 24 continuously rotates. Power is transmitted to the tray 24 through the sheave 11 and the ordinary gear train to maintain the automatic rotation of the tray 24.
The sheave mechanism has simple structure, small overall dimension and high mechanical efficiency, and can perform indexing stably and intermittently.
As shown in fig. 3, the fixed-axis gear train includes an input shaft 12, an output shaft 26 and an intermediate shaft 28, a first gear 29 is sleeved on the input shaft 12, a second gear 27 is sleeved on the intermediate shaft 28, the first gear 29 is meshed with the second gear 27, a worm 281 is sleeved in the intermediate shaft 28, the intermediate shaft 28 is in transmission connection with the worm 281 through a key, and spiral teeth on the worm 281 are meshed with a gear ring 261 sleeved on the output shaft 26.
the input shaft 12 is in transmission connection with the first gear 29 through a key, the intermediate shaft 28 is in transmission connection with the second gear 27 through a key, the output shaft 26 is in transmission connection with the gear ring 261 through a key, key connection is convenient to assemble and disassemble, and centering performance is good.
The arrangement of the ordinary gear train finally transmits the power of the sheave mechanism to the tray 24, so that the rotation of the tray 24 is realized, and the spatial interference of all parts is avoided through the ordinary gear train.
As shown in fig. 4, the tray 24 is connected to a tray seat 49, the tray seat 49 is connected to the output shaft 26 through a gasket 50 and a cylindrical sleeve 51, the driving gear 25 is sleeved on the output shaft 26 through two bearings 38, one bearing 38 is sleeved on the axle 37 of the driving gear 25, and the other bearing 38 is sleeved on the output shaft 26.
Through the above arrangement, the final power transmission of the motor 10 to the tray 24 is realized, so that the tray 24 rotates, and the power transmission route is as follows: the motor 10, the transmission worm 14, the worm wheel 15, the main transmission shaft 16, the notch disc 13, the grooved wheel 11, the input shaft 12, the first gear 29, the second gear 27, the intermediate shaft 28, the worm 281, the output shaft 26 and the tray 24.
The cutter 23 is drivingly connected to the tray 24 through a cutter driving mechanism for moving the cutter 23 in the direction of arrangement of the teeth of the cutter 23.
specifically, as shown in fig. 4, the cutter transmission mechanism includes a driving gear 25, a first transition gear 30 and a driven gear 19, the driving gear 25 is sleeved on an output shaft 26 of the fixed-axis gear train, the driving gear 25 is provided with a wheel shaft 37, the wheel shaft 37 is sleeved with a bearing 38, the output shaft 26 is also sleeved with a bearing 38, the output shaft 26 rotates to drive the driving gear 25 to rotate, the first transition gear 30 is respectively engaged with the driving gear 25 and the driven gear 19 to transmit the power of the driving gear 25 to the driven gear 19, the driven gear 19 is provided with a driven shaft 20 in a penetrating manner, the driven gear 19 drives the driven shaft 20 to rotate, the driven shaft 20 is sleeved with a fixed gear 21, and the fixed gear 21 is connected.
The number of the first transition gears 30 is two, the wheel shafts 37 are arranged on the first transition gears 30, the bearings 38 are sleeved on the wheel shafts 37, the bearings 38 and the wheel shafts 37 are arranged in the mounting plate 52, and the driving gear 25 and the driven gear 19 are in transmission connection through the two first transition gears 30 with the same tooth number, so that the accuracy of meshing movement between the tray 24 and the cutter 23 is guaranteed, and the accuracy of drawn gear envelope curves is also guaranteed.
As shown in fig. 2, the modified gear train includes a second transition gear 22 engaged with the fixed gear 21 and a modified gear 32 engaged with the second transition gear 22, a tool shaft 36 is inserted through the center of the modified gear 32, a transition shaft 332 is inserted through the center of the second transition gear 22, the transition shaft 332 is respectively connected with the driven shaft 20 and the tool shaft 36 through two connecting rods 33, and the tool shaft 36 is in transmission connection with the tool 23.
Illustratively, as shown in fig. 4, a transition shaft 332 is provided on one of the links 33, bearings 38 are respectively sleeved on both ends of the transition shaft 332, and the second transition gear 22 is connected to the transition shaft 332 through the two bearings 38, so that the second transition gear 22 can be meshed with the fixed gear 21 and the modified gear 32 for rotation, respectively, while the transition shaft 332 does not rotate. The connecting rod 33 is further provided with a step shaft 331 for connecting with the cutter shaft 36, the step shaft 331 is sleeved with a bearing 38, one end of the cutter shaft 36 penetrates through the bearing 38, the other end of the cutter shaft 36 is connected with the cutter gear 34, the central shaft 341 of the cutter gear is sleeved outside the cutter shaft 36, the two ends of the central shaft 341 of the cutter gear are respectively sleeved with the bearing 38, the upper end of the central shaft 341 of the cutter gear is fixed through a screw 45, and the lower end of the step shaft 331 is fixed through a screw and a nut 46.
the hole of the step shaft 331 penetrating the connecting rod 33 is a strip-shaped hole, so that the position of the step shaft 331 can be adjusted in the strip-shaped hole, thereby realizing the position change of the cutter shaft 36 on the connecting rod 33.
one end of the other connecting rod 33 is sleeved on the transition shaft 332, and the other end is sleeved on the driven shaft 20.
The fixed gear 21, the second transition gear 22 and the modified gear 32 are connected through two connecting rods 33, the driven shaft 20 is fixed, namely the axis (rotation center) of the fixed gear 21 is fixed, and the axes (rotation centers) of the second transition gear 22 and the modified gear 32, namely the cutter shaft 36, are not fixed, so that in the adjusting process, the center distance between the second transition gear 22 and the fixed gear 21 is not changed, the center distance between the second transition gear 22 and the modified gear 32 is not changed, and the cutter 23 can realize the modification function.
The two connecting rods 33 drive the second transition gear 22 and the modified gear 32 to move, the modified gear 32 moves to change the relative position of the cutter 23 and the tray 24, the tray 24 is circular, the outer periphery of the tray 24 is used as a reference circle, as shown in fig. 5, when the cutter 23 approaches the tray 24, the reference line N of the teeth of the cutter 23 is in the circle of the tray 24, and the tooth profile drawn on the tray is the tooth profile of the negative modified gear; on the contrary, as shown in fig. 6, when the cutter 23 is far from the tray 24, the reference line N of the teeth of the cutter 23 is outside the circle of the tray 24 and is the profile of the teeth of the positively displaced teeth, and when the reference line N of the teeth of the cutter 23 and the pitch line P of the tray 24 coincide, it is the profile of the teeth of the standard teeth. The pitch line P is a tangent to the outer circle of the tray 24.
In addition, as shown in fig. 7, a pointer plate 35 is provided on the tool shaft 36, a pointer end of the pointer plate 35 points to the scale 31, the scale 31 is fixed on a box body 39 accommodating the shift gear train, and the tool shaft 36 rotates to drive the pointer end to slide on the scale 31.
through the position that changes cutter axle 36, the relative position of cutter 23 and tray 24 can be adjusted cutter 23 to the required position of experiment simultaneously according to the scale on the scale 31, and then realizes the positive and negative profile shift function of gear, and so, the automatic generating instrument of this embodiment just can draw standard gear, positive profile shift gear and negative profile shift gear automatically, realizes drawing the variety of flank profile.
the box 39 is hollow, the fixed gear 21, the second transition gear 22 and the modified gear 32 are arranged in the box 39, and the graduated scale 31 is fixed on the outer wall of the box 39.
As shown in fig. 1, with the above arrangement, the final transmission of the power of the motor 10 to the cutter 23 is realized, so that the cutter 23 moves along the arrangement direction of the teeth on the cutter 23, and the power transmission route is as follows: the motor 10, the transmission worm 14, the worm wheel 15, the main transmission shaft 16, the notched disc 13, the grooved wheel 11, the input shaft 12, the first gear 29, the second gear 27, the intermediate shaft 28, the output shaft 26, the driving gear 25, the first transition gear 30, the cutter gear 34, the driven shaft 20, the fixed gear 21, the second transition gear 22, the modified gear 32, the cutter shaft 36- (the cutter gear 34) and the cutter 23.
To complete the drawing of the tooth profile, the cutter 23 is brought into contact with the paper tray, and the teeth of the cutter 23 are printed on the paper tray, so that the other end of the main drive shaft 16 is drivingly connected to the cutter 23 through the intermittent mechanism for pressing down the cutter 23 into contact with the paper tray.
Specifically, as shown in fig. 1, the intermittent mechanism includes an intermittent shaft 181, a cam plate 18 and a cam 17, the cam plate 18 is fixed on the intermittent shaft 181, the cam 17 is sleeved on the main transmission shaft 16, and the periphery of the cam 17 abuts against the cam plate 18.
As shown in fig. 4, the cam plate 18 is fixed with an intermittent shaft 181, one end of the intermittent shaft 181 is arranged in the sleeve 47, the driven gear 19 is fixed on the fixed seat 48, the driven gear 19 is sleeved on the driven shaft 20, the bearing 38 is sleeved on the fixed seat 48, and the bottom surface of the driven shaft 20 is abutted with the top surface of the intermittent shaft 181, so that when the driven gear 19 drives the driven shaft 20 to rotate, the intermittent shaft 181 is not rotated, the intermittent shaft 181 moves up and down along with the rotation of the cam 17 in the axial direction of the intermittent shaft 181, and drives the driven shaft 20 to move up and down along the axial direction of the driven shaft 20, so as to realize longitudinal intermittent motion (namely, the tool 23 is driven to press down once per downward motion, and the tooth profile of the tool 23 can be printed on the paper tray.
The cam 17 is provided with two protrusions which are arranged oppositely and are connected with each other through an arc transition, so that the intermittent shaft 181 is jacked up when the cam 17 rotates to the protrusion of the cam 17 (as shown in fig. 1), and when the cam 17 rotates to the arc transition, the intermittent shaft 181 is pressed down to realize longitudinal intermittent motion to drive the cutter 23 to be pressed down.
The time interval of the pressing of the cutter 23 and the rotation angle of the tray 24 are related to the rotation speed of the motor 10, the time interval of the pressing of the cutter 23 and the rotation angle of the tray 24 are preset according to actual needs, then the rotation speed of the motor 10 is calculated in a reverse mode, and in actual operation, the rotation speed of the motor 10 is set, so that the desired time interval of the pressing of the cutter 23 and the rotation angle of the tray 24 can be obtained, and drawing requirements can be met.
When the cutter 23 moves in the direction, the edge of the cutter 23 is printed with a part of bulge, firstly contacts the ink box, then rotates to the paper disc part, and prints a clear tooth profile.
The cutter 23 may be a bar cutter or a gear cutter, as shown in fig. 2, when the cutter 23 is a bar cutter, the teeth on the cutter 23 are arranged in a bar shape to form bar teeth, the outline of the bar teeth is projected on the paper tray, the cutter shaft 36 is sleeved with the cutter gear 34, the cutter gear 34 is engaged with the rack 54, the rack 54 is connected with the cutter 23 and is used for driving the cutter 23 and the cutter shaft 36 to be connected, and the cutter 23 moves to print the tooth profile of the bar teeth on the paper tray, thereby completing the automatic drawing of the tooth profile.
As shown in fig. 9 and 10, when the cutter 23 is a circular cutter, the teeth on the cutter 23 are circumferentially arranged to form gear teeth, and at this time, the cutter 23 is a gear, the gear is directly sleeved on the cutter shaft 36, the gear teeth of the gear are in contact with the paper tray, and the tooth profile of the gear teeth is printed on the paper tray, so that the automatic drawing of the tooth profile is completed.
Bar cutter and gear cutter all can be dismantled from cutter axle 36, and through the detachable setting, the bar cutter of being convenient for and gear cutter's conversion is used, can realize the profile drawing of the rack and teeth of a cogwheel.
As shown in fig. 7 and 8, in the automatic generating instrument of the present embodiment, the power source, the main transmission mechanism, the tray transmission mechanism, and the cam 17 are all disposed in the box 40, the box 40 includes an upper box 402 and a lower box 401, a plurality of grooves 4011 are respectively disposed in the upper box 402 and the lower box 401 for supporting the gears, shafts, and the motor 10 at the above corresponding positions, taking the main transmission shaft 16 as an example, as shown in fig. 1 and 8, the main transmission shaft 16 is sleeved with a support bearing 53, the support bearing 53 is vertically disposed in the groove 4011, so that the outer circumferential wall of the support bearing 53 is abutted against the groove wall of the groove 4011, when the main transmission shaft 16 rotates, the support bearing 53 is driven to rotate, the support bearing 53 rotates at the groove wall of the groove 4011, the lower box 401 supports the main transmission shaft 16 through the support bearing 53, and the main transmission shaft 16 can rotate smoothly. The upper box body 402 and the lower box body 401 are butted and folded to contain the power source, the main transmission mechanism, the tray transmission mechanism and the cam 17, so that all the components are protected, dust and the like are prevented from polluting all the components, and the normal operation of all the components is ensured.
The side wall of the box body 40 is provided with a groove, a drawing box 403 is arranged in the groove, so that the drawing box 403 can be drawn out or pushed into the box body 40, the drawing box 403 is two, a caulking groove is arranged in the drawing box 403 and used for accommodating the cutter 23, when the cutter 23 is not needed, the cutter 23 can be detached and placed in the drawing box 403, and then the drawing box 403 is pushed into the box body 40, so that the cutter 23 is prevented from being damaged due to long-time placement outside the box body 40, and the service life of the cutter 23 is further shortened; when necessary, the cutter 23 in the drawer box 403 is removed and attached, and the configuration shown in fig. 7 is obtained.
The automatic generating instrument provided by the embodiment has the characteristics of convenience in operation, rich functions and the like, and well solves the problems of complex operation and large error in the conventional manual drawing process; the operation is simple, the experiment shows good effect, the principle and the characteristics of the generating method can be well embodied, and the method is suitable for teaching application of the generating movement basic experiment; the complex manual operation can be converted into simple mechanical transmission, so that the time is saved, the experimental error is reduced, students can easily observe the operation in the teaching process, and the principle of the generating method can be better understood; the tray 24 is rotated automatically, the consistency of the density degree of the envelope curve drawn by the experiment is ensured, the requirement of processing the gear with positive and negative displacement is met, and the effect is good.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automated generating apparatus, comprising: the paper feeding device comprises a main transmission mechanism, a tray (24) and a cutter (23), wherein the tray (24) is used for placing paper trays, a plurality of teeth are arranged on the cutter (23), and the outlines of the teeth are projected on the paper trays;
The main drive mechanism includes drive worm (14), with worm wheel (15) of drive worm (14) meshing and wear to establish main drive shaft (16) at worm wheel (15) center, the external power supply of drive worm (14), the one end of main drive shaft (16) pass through tray drive mechanism with tray (24) transmission is connected, so that the tray uses the centre of a circle to rotate as the center, the other end of main drive shaft (16) through intermittent type mechanism with cutter (23) transmission is connected, be used for making cutter (23) push down with the paper dish contact, cutter (23) still through cutter drive mechanism with tray (24) transmission is connected, be used for making cutter (23) are followed the direction of arranging of the tooth of cutter is walked the position.
2. The automated generating instrument according to claim 1, wherein the tray transmission mechanism comprises a notched disc (13), a sheave (11) and a fixed-axis gear train, the notched disc (13) and the sheave (11) form the sheave mechanism, the notched disc (13) is in transmission connection with the main transmission shaft (16), an input shaft (12) of the fixed-axis gear train is in transmission connection with the sheave (11), and an output shaft (26) of the fixed-axis gear train is in transmission connection with the tray (24).
3. The automatic generation instrument according to claim 2, characterized in that the fixed-axis gear train comprises an input shaft (12), an output shaft (26) and an intermediate shaft (28), wherein a first gear (29) is sleeved on the input shaft (12), a second gear (27) is sleeved on the intermediate shaft (28), the first gear (29) is meshed with the second gear (27), a worm (281) is sleeved in the intermediate shaft (28), and the worm (281) is meshed with a gear ring (261) sleeved on the output shaft (26).
4. The automatic generation instrument according to claim 2, characterized in that the tool transmission mechanism comprises a driving gear (25), a first transition gear (30) and a driven gear (19), the driving gear (25) is sleeved on an output shaft (26) of the fixed-axis gear train, the first transition gear (30) is respectively meshed with the driving gear (25) and the driven gear (19), a driven shaft (20) is arranged on the driven gear (19) in a penetrating manner, a fixed gear (21) is sleeved on the driven shaft (20), and the fixed gear (21) is connected with the tool (23) through a modified gear train.
5. The automatic generating instrument according to claim 4, characterized in that the modified gear train comprises a second transition gear (22) engaged with the fixed gear (21) and a modified gear (32) engaged with the second transition gear (22), a tool shaft (36) is arranged in the center of the modified gear (32), a transition shaft (332) is arranged in the center of the second transition gear (22), the transition shaft (332) is respectively connected with the driven shaft (20) and the tool shaft (36) through two connecting rods (33), and the tool shaft (36) is used for being in transmission connection with the tool (23).
6. The automatic generation instrument according to claim 5, characterized in that the tool shaft (36) is provided with a pointer plate (35), a pointer end of the pointer plate (35) points to the graduated scale (31), the graduated scale (31) is fixed on a box body (39) containing the deflection gear train, and the tool shaft (36) rotates to drive the pointer end to slide on the graduated scale (31).
7. The automatic generation instrument according to claim 4, characterized in that the intermittent mechanism comprises an intermittent shaft (181), a cam plate (18) and a cam (17), the cam plate (18) is fixed on the intermittent shaft (181), the cam (17) is sleeved on the main transmission shaft (16), and the periphery of the cam (17) is abutted against the cam plate (18).
8. The automatic generator of claim 1, wherein the cutter (23) is a bar cutter, the teeth on the cutter (23) form bar teeth in a bar arrangement, the profile of the bar teeth being projected on the tray; the cutter (23) is connected with a rack (54), a cutter gear (34) is sleeved on the cutter shaft (36), and the cutter gear (34) is meshed with the rack (54).
9. the automatic generation instrument according to claim 1, wherein the cutter (23) is a circular cutter, teeth on the cutter (23) are circumferentially arranged to form gear teeth, the cutter (23) is sleeved on the cutter shaft (36), and the contour of the gear teeth is projected on the paper tray.
10. The automatic generating instrument according to claim 7, further comprising a case (40), wherein the power source, the main transmission mechanism, the tray transmission mechanism, the cam (17) are provided in the case (40).
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| CN201910863025.7A CN110570745B (en) | 2019-09-12 | 2019-09-12 | Automatic generating instrument |
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| CN201910863025.7A CN110570745B (en) | 2019-09-12 | 2019-09-12 | Automatic generating instrument |
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| CN110570745B CN110570745B (en) | 2021-05-25 |
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Cited By (1)
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| CN111968483A (en) * | 2020-08-13 | 2020-11-20 | 河海大学常州校区 | High efficiency bores wood mechanical device that gets fire |
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