CN104700707B - Teaching instrument with cam mechanism - Google Patents
Teaching instrument with cam mechanism Download PDFInfo
- Publication number
- CN104700707B CN104700707B CN201510120243.3A CN201510120243A CN104700707B CN 104700707 B CN104700707 B CN 104700707B CN 201510120243 A CN201510120243 A CN 201510120243A CN 104700707 B CN104700707 B CN 104700707B
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- Prior art keywords
- lever
- cam
- frame
- follower lever
- roller
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- Expired - Fee Related
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention relates to a teaching instrument with a cam mechanism. The teaching instrument comprises a rotatable cam fixed on a rack, a circular drawing board and a pressure angle indicator, wherein a roller is tightly clung on the outline of the cam; the roller is in threaded connection with a driven rod; a fine rod is arranged beside the driven rod in parallel; the driven rod can axially move relative to the fine rod through a plurality of lever sets. The teaching instrument with the cam mechanism adopts a modularized design, can realize replacing forms of the driven rod roller, a flat head and a tip head, indicating the pressure angle of the driven rod, drawing a displacement curve of three driven rods, changing the cam centering and offsetting position, drawing a cam curve through a reversal method, and indicating a stroke angle of the cam. The teaching instrument solves the defects that a teaching instrument with two large cam mechanisms is high in cost, large in size, large in weight and single in function, is relatively small in weight and size, convenient to carry, simple to manufacture, low in cost and suitable for large-area popularization.
Description
Technical field
The present invention relates to mechanical teaching aid field, is a kind of cam mechanism teaching appliance.
Background technology
What the teaching aid of cam mechanism lacked in the market is very few, and one of them is that Shanghai has with teaching instrument and equipment manufacture is educated
The cam mechanism teaching of the TYJD-I cam mechanism testing stands of limit company, also a Ge Shi Shanghai teaching equipment company limited of Huayu
Model.The former employs driving system of stepping motor and high accuracy optical grating ruler measurement system can precisely measure out the true of cam
Real movement locus and the moving displacement per angle, can accurately draw the true profile and speed of cam by computer software,
Acceleration.Although equipment can accurately measure the partial parameters of cam, as which needs computer equipment to set as core
It is standby, so this just determines the limitation that time testing stand is used.It can not allow student in common teaching link more easily
Understand cam mechanism, and corresponding laboratory must be arrived and participate in experiment, this has resulted in certain constraint.And testing stand needs
Some tight parts, add computer as auxiliary, and required cost high will must allow many educational institutions to be hung back.The latter
It is the teaching mode of a full aluminum, size is little, can be easy to carry, easy to use.Either processing and manufacturing, bulking value,
Or price is all more human-oriented, but single function is its critical defect.This model can only realize that translating follower is convex in dish type
Under wheel is rotated, realize moving up and down, then without other functions.Therefore this teaching mode can not show cam mechanism completely
Other important parameters.
The content of the invention
The purpose of the present invention is for above weak point, there is provided a kind of bulking value is less, be easy to carry, and make
Make it is simple, with low cost, suit large area to popularize and multiple functional cam mechanism teaching appliance.
The present invention solves the scheme that adopted of technical problem, a kind of cam mechanism teaching appliance, including being fixed in frame
Rotatable cam, circular drawing board and pressure angle indicator, be glued with roller on the cam contour, the roller with it is driven
Bar is connected, and the follower lever side is arranged with thin bar in parallel, and the follower lever is realized relative by some lever groups with thin bar
Axial movement.
Further, the cam is arranged on the handle coaxial rotating of the lower section of frame, the cam and frame opposite side,
The gear of coaxial rotating is additionally provided between the handle and frame, the cam is being fixed with coaxial rotating away from frame side
Cam base circle, the cam that the biasing that some centers of circle and follower lever are not arranged on the same straight line is provided with the frame installs
Hole.
Further, the roller is circumscribed with the contour line of cam, above the roller by roller head with it is vertical from
Lever is connected, and the follower lever is provided with slide block through the boss being arranged in frame at the top of the follower lever, the slide block is embedding
Enter, offer on the slide block for installing the through hole of paintbrush,
Positive stop lug boss is additionally provided with the top of the follower lever, the bullet axially across follower lever between the positive stop lug boss and boss, is provided with
Spring.
Further, the positive front side vertical of the follower lever is provided with thin bar, and the thin bar is through the boss in frame, institute
State, between the positive stop lug boss and boss, be provided with the spring axially across thin bar, institute
The bottom for stating thin bar is fixed with thimble, and the end of the thimble is wedge structure, the wedge structure and cam base circle surface
Distance is 1.5mm.
Further, the lever group includes the lever A positioned at frame top, described lever A one end be for thin bar
The dome contact of top contact, middle part are hinged with frame by straight pin, and another side is hanging, the hanging side of the lever A
Bottom be lever B, described lever B one end is that for the dome contact with follower lever top contact, the other end passes through straight pin
It is hinged with frame, the lever B is also dome contact in the contact position with lever A, the lower section of the lever B is lever C, institute
It is that, for the dome contact with follower lever top contact, the other end is hinged with frame by straight pin, the thick stick to state lever C one end
It is lever D below bar C, the lever C is dome contact in the contact position with lever D, described lever D one end is hanging, another
End is hinged with frame by straight pin, and middle part is contacted with the positive stop lug boss of the thin bar positioned at bottom by dome contact, the thick stick
Bar A, lever B, lever C to be hinged direction in opposite direction with being hinged for lever D.
Further, the cam base circle is fixed with four axial locations not by nut and pad on the position in the center of circle
The pointer of change, the pointer are close to the surface of cam base circle and cam synchronous rotary, and the pointer is by two Long pointers and two
Short pointer is constituted, and the top of the pointer is also wedge structure.
Further, the vertical displacement amount of the thin bar is a quarter of the vertical displacement amount of lever A and lever B.
Further, the frame is provided with drawing board in handle one end, can phase in the groove in the embedded frame of the drawing board
For frame carries out reciprocal horizontal sliding, the drawing board bottom is the rack structure engaged with gear, and the groove is in gear
The position engaged with tooth bar offers resigning mouth, and drawing paper is pasted in the drawing board side, and opposite side offers some driven member motions
Curved groove.
Further, the bottom of the follower lever is provided with screw thread, the follower lever by nut can with tip, tack and
Roller head is attached, and offers small sircle hole on the tip head.
Further, the circular drawing board central authorities are offered for carrying out connected hole with handle, on the circular drawing board
Drawing paper is stained with, the pressure angle indicator includes matrix, is vertically and fixedly provided with angulation pointer, also welds in described matrix in described matrix
It is connected to the small sircle hole for opening up in inserting tip head portion and realizes the path pin being hinged.
Compared with prior art, the invention has the advantages that：The cam mechanism teaching appliance is internally provided with some
Drawing board and measuring instrument, stable working, realize driven member move while, with the addition of dynamic state of parameters cognition, curve plotting,
Priority and difficulty about cam is truly represented by the functions such as influence factor one by one, and these functions are all concentrated on one
On instrument, with operability well.And each part of the invention can be dismounted, interchangeability preferably, is easy to maintenance.The device
Bulking value is less, is easy to carry, and is simple to manufacture, with low cost, suits large area to popularize.
Description of the drawings
Below in conjunction with the accompanying drawings patent of the present invention is further illustrated.
Fig. 1 is the front view of the invention；
Fig. 2 is the side view of the invention；
Fig. 3 is the structural representation one of the invention；
Fig. 4 is the structural representation two of the invention；
Structural representations of the Fig. 5 for pressure angle indicator；
Working state schematic representations of the Fig. 6 for Fig. 5；
Working state schematic representations of the Fig. 7 for drawing board；
Fig. 8 is the working state schematic representation that cam curve is drawn in reversal process；
Fig. 9 is the working state schematic representation for indicating cam stroke angle；
In figure：
1- frames；2- cams；3- circle drawing boards；4- pressure angle indicators；5- rollers；6- follower levers；7- thin bars；8- levers
Group；9- handles；10- gears；11- cam base circles；12- roller heads；13- slide blocks；14- grooves；15- paintbrushes；16- through holes；17- is limited
Position boss；18- springs；19- thimbles；20- lever A；21- straight pins；22- lever B；23- lever C；24- lever D；25- pointers；
26- drawing boards；27- tooth bars；28- driven member curve movement grooves；29- small sircle holes；30- drawing paper；31- matrixes；32- angulation pointers；33-
Pin；34- pen cores.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
As shown in Fig. 1～9, a kind of cam mechanism teaching appliance, including the rotatable cam 2, circle that are fixed in frame 1
Drawing board 3 and pressure angle indicator 4, are glued with roller 5 on 2 profile of the cam, the roller 5 is connected with follower lever 6, it is described from
6 side of lever is arranged with thin bar 7 in parallel, and the follower lever 6 realizes axially opposite movement by some lever groups 8 and thin bar 7.
In the present embodiment, the cam 2 is arranged on the handle 9 of the lower section of frame 1, the cam 2 and 1 opposite side of frame
Coaxial rotating, is additionally provided with the gear 10 of coaxial rotating between the handle 9 and frame 1, the cam 2 is away from frame 1 one
Side is fixed with the cam base circle 11 of coaxial rotating, is provided with some centers of circle with follower lever 6 not in same straight line in the frame 1
On biasing cam installing hole.
In the present embodiment, the roller 5 is circumscribed with the contour line of cam 2, above the roller 5 by roller head 12 with
Vertical follower lever 6 is threadedly coupled, and the follower lever 6 is set at the top of the follower lever 6 through the boss 12 being arranged in frame 1
Slide block 13 is equipped with, the slide block 13 is embedded in the groove 14 opened up at the top of frame 1 and carries out reciprocal sliding motion, the slide block 13
On offer for installing the through hole 16 of paintbrush 15, positive stop lug boss 17, the positive stop lug boss are additionally provided with the top of the follower lever 6
The spring 18 for controlling the reset of follower lever 6 axially across follower lever 6 is provided between 17 and boss 12.
In the present embodiment, the positive front side vertical of the follower lever 6 is provided with thin bar 7, and the thin bar 7 is through in frame 1
Boss 12, the middle part of the thin bar 7 is provided with positive stop lug boss 17, is provided with axial direction between the positive stop lug boss 17 and boss 12
Through the spring 18 of thin bar, the spring 18 is used for the power for providing the reset of thin bar 7, and the bottom of the thin bar 7 is fixed with thimble 19,
The end of the thimble 19 is wedge structure, and the wedge structure is 1.5mm with the distance on 11 surface of cam base circle.
In the present embodiment, the lever group 8 includes the lever A20 that the length positioned at frame top is 78mm, the thick stick
Bar A20 one end is that, for the dome contact with 7 top contact of thin bar, middle part is hinged with frame 1 by straight pin 21, another side
Vacantly, the bottom of the hanging sides of the lever A20 for length 80mm lever B22, described lever B22 one end be for from
The dome contact of 6 top contact of lever, the other end are hinged with frame 1 by straight pin 21, the lever B22 with lever A20
Contact position be dome contact apart from hinged place 20mm, the lever C23 of the lower section of the lever B22 for length 94mm, institute
It is that, for the dome contact with 6 top contact of follower lever, the other end is hinged with frame 1 by straight pin 21 to state lever C23 one end,
It is the lever D24 of length 140mm below the lever C23, the lever C23 is distance hinge in the contact position with lever D24
The dome contact of place 25mm is connect, described lever D24 one end is hanging, and the other end is hinged with frame 1 by straight pin 21, and middle part passes through
Dome contact is contacted with the positive stop lug boss 17 of the thin bar 7 positioned at bottom, the lever A20, lever B22, the side of being hinged of lever C23
To in opposite direction with being hinged for lever D24.
In the present embodiment, the cam base circle 11 is fixed with four axial directions by nut and pad on the position in the center of circle
The constant pointer 25 in position, the pointer 25 are close to the surface of cam base circle 11 and 12 synchronous rotary of cam, the pointer 25 by
Two Long pointers and two short pointer compositions, the top of the pointer 25 is also wedge structure.
In the present embodiment, the vertical displacement amount of the thin bar 7 is the four of the vertical displacement amount of lever A20 and lever B22
/ mono-.
In the present embodiment, the frame 1 is provided with drawing board 26 in 9 one end of handle, and the drawing board 26 is embedded in frame 1
Reciprocal horizontal sliding can be carried out relative to frame 1 in groove, 26 bottom of the drawing board is the rack structure engaged with gear 10
27, the groove offers resigning mouth in the position that gear 10 is engaged with tooth bar 27, and drawing paper is pasted in 26 side of the drawing board, another
Side offers some driven member curve movement grooves 28.
In the present embodiment, the bottom of the follower lever 6 is provided with screw thread, the follower lever 6 by nut can with tip,
Tack and roller head are attached, and offer small sircle hole 29 on the tip head.
In the present embodiment, 3 central authorities of circular drawing board are offered for carrying out connected hole, the circle with handle 9
Drawing paper 30 is stained with drawing board 3, the pressure angle indicator 4 includes matrix 31, angulation pointer is vertically and fixedly provided with described matrix 31
32, the small sircle hole 29 for opening up in inserting tip head portion is also welded with described matrix 31 and realizes the path pin 33 being hinged.
Specific implementation process：
Embodiment one：The replacing of driven member：The head of follower lever 6 be driven member, driven member can be replaced with three kinds it is different
Form：Tip, tack and roller.6 straight bar part of follower lever has screw thread with head, just can be connected to both by nut
Together, so as to realizing the switching of tip, tack and roller.
Embodiment two：The instruction of pressure angle：When follower lever 6 is attached with tip driven member, the end of tip driven member
End offers small sircle hole 29, and small sircle hole 29 of the pin 33 on pressure angle indicator 4 with tip driven member is hinged, and pressure angle refers to
Show that the matrix 31 of device 4 is close to 2 outline of cam, the angle that wherein angulation pointer 32 is formed with follower lever 6 is pressure angle, when convex
During wheel rotation, pressure angle will change therewith.
Embodiment three：When carrying out drawing the displacement curve of driven member 6 using drawing board 26, by swinging handle 9 so that same
The cam 2 of axle is rotated with same angular velocity with gear 10, and gear 10 coordinates tooth bar 27 to move with identical linear velocity, tooth bar 27
On drawing board 26 left and right is removable at the volley.Paintbrush 15 is installed on through hole 16 on the slide block 13 at the top of follower lever 6 simultaneously,
Paintbrush 15 also does corresponding up and down motion under the slip of slide block 13, thus leaves with 2 rotating speed of cam as horizontal stroke in drawing board 26
Coordinate, the movement profiles with 6 displacement of driven member as vertical coordinate.
Example IV：When exchange cam is to the position of the heart or biasing, first the cam that script is installed is pulled down, then in frame
The cam installing hole on the position of needs is selected on 1, cam is reinstalled.Then cam can be just found in rotation cam
When position is different, the characteristics of motion of follower lever can also be changed.
Embodiment five：When cam curve is drawn in reversal process, cam 2 is pulled down, circular drawing board 3 is changed, and at 6 bottom of follower lever
Pen core 34 is connected on the small sircle hole 29 of the tip driven member in portion, then pen core 34 selects 26 back side of drawing board perpendicular to circular drawing board 3
Any one driven member curve movement groove 28, and a special roller is loaded onto on the top of follower lever 6, roller is embedded in driven member
Curve movement groove, using the mobile side effect of driven member curve movement groove so that driven member does specific motion, while replacing convex
The circular drawing board of wheel is rotated with constant angular velocity, so as to accurate and corresponding cam contour is drawn out on circular drawing board 3.
Embodiment six：When indicating the stroke angle of cam, the driven member form for needing is selected, finger is loaded onto while cam is filled
Pin 25, is finally locked with nut.At the uniform velocity rotary handle 9, cam and then rotation, follower lever 6 is moved up and down, while other one thin
The wedge structure of the thimble 19 of 7 bottom of bar stirs pointer, and when having rotated one week, pointer will rest on dividing for each stroke angle
At boundary line.Specially：During far angle of repose starting point is moved near angle of repose terminal, thin bar 7 is needed to follow follower lever 6
Lifting and decline.When far angle of repose starting point is reached, the vertical displacement amount of lever A20 and lever B22 is 14mm, because of its space
On leverage design, calculate in thin bar when, the falling head of thin bar is the 1/4 of above-mentioned displacement, as 14 × 1/4=
3.5mm.The height of the decline can just make the wedge structure of thin bar end move to short pointer from Long pointer, in this process
In, wedge structure skips over Long pointer, withstands short pointer, until next ad-hoc location（The terminal at long-range angle）.Reach this position
When putting, follower lever 6 overcomes the power of spring 18 to decline with the motion of cam 12, and lever A20 is made with the event resolves of lever B22
Obtain this group of lever and be returned to initial position, thin bar 7 is gone up by the elastic force of spring 18 rapidly, and wedge structure skips over short pointer, top
Firmly Long pointer.Then the short pointer of the Long pointer in starting point and terminal constitutes the display at long-range angle.In the same manner, indicating closely to stop
During angle, the maximum vertical penetration of thin bar 7 is also the 1/4 of displacement, and equal to 3.5mm, this height for being lifted just makes wedge
Shape structure moves to Long pointer from short pointer.
The object, technical solutions and advantages of the present invention are further described by above-listed preferred embodiment, answered
It is understood by, the foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of cam mechanism teaching appliance, indicates including the rotatable cam being fixed in frame, circular drawing board and pressure angle
Device, it is characterised in that：Roller is glued with the cam contour, the roller is connected with follower lever, and the follower lever side is put down
Row is provided with thin bar, and the follower lever realizes axially opposite movement by some lever groups and thin bar；The lever group includes
Positioned at the lever A of frame top, described lever A one end is that, for the dome contact with thin bar top contact, middle part passes through cylinder
Pin is hinged with frame, and another side is hanging, and the bottom of the hanging side of the lever A is lever B, and described lever B one end is use
In the dome contact with follower lever top contact, the other end is hinged with frame by straight pin, and the lever B is with lever A's
Contact position is also dome contact, and the lower section of the lever B is lever C, described lever C one end be for follower lever at the top of connect
Tactile dome contact, the other end are hinged with frame by straight pin, below the lever C be lever D, the lever C with thick stick
The contact position of bar D is dome contact, and vacantly, the other end is hinged with frame by straight pin, and middle part passes through for described lever D one end
Dome contact contacted with the positive stop lug boss of thin bar positioned at bottom, and the lever A, lever B, lever C are hinged direction and thick stick
Being hinged for bar D is in opposite direction.
2. cam mechanism teaching appliance according to claim 1, it is characterised in that：The cam is arranged on the lower section of frame,
The cam and the handle coaxial rotating of frame opposite side, are additionally provided with the gear of coaxial rotating between the handle and frame,
The cam the cam base circle of coaxial rotating is fixed with away from frame side, be provided with the frame some centers of circle with it is driven
The cam installing hole of the biasing that bar is not arranged on the same straight line.
3. cam mechanism teaching appliance according to claim 1, it is characterised in that：Outside the contour line of the roller and cam
Cut, be connected with vertical follower lever by roller head above the roller, the follower lever passes through the boss being arranged in frame,
Slide block is provided with the top of the follower lever, in the groove that the embedded frame top of the slide block is opened up, reciprocal sliding motion is carried out,
Offer on the slide block for installing the through hole of paintbrush, at the top of the follower lever, be additionally provided with positive stop lug boss, the limit convex
The spring axially across follower lever is provided between platform and boss.
4. the cam mechanism teaching appliance according to claim 1 or 3, it is characterised in that：The positive front side vertical of the follower lever
Thin bar is provided with, the thin bar is provided with positive stop lug boss, the positive stop lug boss through the boss in frame in the middle part of the thin bar
The spring axially across thin bar is provided between boss, the bottom of the thin bar is fixed with thimble, and the end of the thimble is
Wedge structure, the wedge structure are 1.5mm with the distance on cam base circle surface.
5. cam mechanism teaching appliance according to claim 1, it is characterised in that：The cam base circle is on the position in the center of circle
Four constant pointers of axial location are fixed with by nut and pad, the surface that the pointer is close to cam base circle is same with cam
Step rotation, the pointer are made up of with two short pointers two Long pointers, and the top of the pointer is also wedge structure.
6. cam mechanism teaching appliance according to claim 1 and 2, it is characterised in that：The frame is arranged in handle one end
There is drawing board, in the groove in the embedded frame of the drawing board, reciprocal horizontal sliding, the drawing board bottom can be carried out relative to frame
It is the rack structure engaged with gear, the groove offers resigning mouth, the drawing board one in the position that wheel and rack is engaged
Drawing paper is pasted in side, and opposite side offers some driven member curve movement grooves.
7. cam mechanism teaching appliance according to claim 1, it is characterised in that：The bottom of the follower lever is provided with spiral shell
Stricture of vagina, the follower lever can be attached with tip, tack and roller head by nut, offer roundlet on the tip head
Hole.
8. the cam mechanism teaching appliance according to claim 1 or 7, it is characterised in that：The circular drawing board central authorities offer
For connected hole being carried out with handle, be stained with drawing paper, the pressure angle indicator includes matrix, the base on the circular drawing board
Angulation pointer is vertically and fixedly provided with body, is also welded with described matrix and is realized what is be hinged for inserting the small sircle hole opened up on tip
Path pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510120243.3A CN104700707B (en) | 2015-03-19 | 2015-03-19 | Teaching instrument with cam mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510120243.3A CN104700707B (en) | 2015-03-19 | 2015-03-19 | Teaching instrument with cam mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104700707A CN104700707A (en) | 2015-06-10 |
| CN104700707B true CN104700707B (en) | 2017-04-12 |
Family
ID=53347776
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510120243.3A Expired - Fee Related CN104700707B (en) | 2015-03-19 | 2015-03-19 | Teaching instrument with cam mechanism |
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| CN (1) | CN104700707B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590536A (en) * | 2015-12-26 | 2016-05-18 | 四川科技职业学院 | Mandrel press demonstration device |
| CN107464491A (en) * | 2017-07-18 | 2017-12-12 | 南京理工大学 | Cam mechanism experimental bench is used in one kind teaching |
| CN108215465A (en) * | 2018-01-30 | 2018-06-29 | 惠州佳景印刷制品有限公司 | A kind of linkage unit for printing machine |
| CN109949681B (en) * | 2019-03-28 | 2023-11-24 | 大连理工大学 | Disc-shaped cam device with settable base circle |
| CN110379286B (en) * | 2019-07-22 | 2021-03-16 | 焦作师范高等专科学校 | Mechanism motion model suitable for teaching |
| CN111243418B (en) * | 2020-02-26 | 2022-02-01 | 浙江大学城市学院 | Experiment teaching instrument and experiment method for demonstrating design of disc-shaped cam profile by reversal method |
| CN111457295B (en) * | 2020-04-28 | 2022-03-25 | 大庆恒驰电气有限公司 | Adjustable LED illuminating lamp |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5068837A (en) * | 1990-10-26 | 1991-11-26 | Lowrance Arlen J | Combined racing kite gate and quick draw device |
| CN202523298U (en) * | 2011-11-11 | 2012-11-07 | 南京化工职业技术学院 | Mapper for cam gear movement rules |
| CN203659329U (en) * | 2013-11-20 | 2014-06-18 | 张国军 | Multi-parameter multivariable cam measurement experiment table |
| CN103824505B (en) * | 2014-03-18 | 2016-06-08 | 西安工业大学 | Cam plotting apparatus |
| CN103971584B (en) * | 2014-05-23 | 2016-01-06 | 武汉理工大学 | A kind of cam mechanism integrative demonstration teaching aid |
| CN104332093B (en) * | 2014-09-17 | 2017-01-11 | 杭州电子科技大学 | Cam analyzer |
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2015
- 2015-03-19 CN CN201510120243.3A patent/CN104700707B/en not_active Expired - Fee Related
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| CN104700707A (en) | 2015-06-10 |
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