CN214475971U - Teaching aid for demonstration of four-bar linkage - Google Patents
Teaching aid for demonstration of four-bar linkage Download PDFInfo
- Publication number
- CN214475971U CN214475971U CN202120817639.4U CN202120817639U CN214475971U CN 214475971 U CN214475971 U CN 214475971U CN 202120817639 U CN202120817639 U CN 202120817639U CN 214475971 U CN214475971 U CN 214475971U
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- rod
- demonstration
- bar linkage
- teaching aid
- positioning
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- 238000000034 method Methods 0.000 abstract description 8
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- 230000009286 beneficial effect Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
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- 230000004888 barrier function Effects 0.000 description 2
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- 238000001125 extrusion Methods 0.000 description 1
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- 238000001746 injection moulding Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a teaching aid is used in four-bar linkage's demonstration. This kind of teaching aid for demonstration of four-bar linkage includes: frame, telescopic link subassembly, bottom plate, frame slide to set up in the bottom plate, and telescopic link unit mount includes in the frame: the body of rod, support piece, the body of rod have two and along horizontal setting, and two bodies of rod set up along vertical interval, and support piece detachable connects between the body of rod and is used for fixing a position the body of rod, and telescopic link subassembly has three and end to end in proper order, and the front end that is located the telescopic link subassembly of prelude articulates in one of them body of rod, and the rear end that is located the telescopic link subassembly of afterbody articulates in another body of rod. Through the cooperation of telescopic link subassembly and frame, simulate four bar linkage's law of motion, this in-process because the telescopic link subassembly of prelude and afterbody is connected respectively in the frame of difference to the telescopic link subassembly has been avoided rotating the problem that the in-process has the interference.
Description
Technical Field
The utility model relates to a teaching aid, in particular to teaching aid is used in four-bar linkage's demonstration.
Background
At present, the teacher can adopt various teaching aids to give the various abstract theoretical knowledge of student's lively and vivid show at the teaching in-process, and to four-bar linkage's motion principle, the teaching aid that adopts the individual layer frame usually explains, each side length through changing four-bar linkage, the realization is to the crank rocker, two rocker machines, the demonstration of two crank mechanisms, but when demonstrating two crank mechanisms, because two cranks connect in the same layer in the frame, make two cranks the problem that mutual interference probably appears in the whole week rotation in-process of carrying out.
SUMMERY OF THE UTILITY MODEL
This application is through providing a teaching aid for four-bar linkage's demonstration to this problem that can produce the interference in solving simulation double crank mechanism motion process.
The embodiment of the application provides a teaching aid is used in demonstration of four-bar linkage, includes:
a frame, the frame comprising:
the two rod bodies are arranged along the transverse direction and are arranged at intervals along the vertical direction;
the supporting piece is detachably connected between the rod bodies and used for positioning the rod bodies;
the bottom plate is arranged on the rack in a sliding manner;
the telescopic rod subassembly, telescopic rod subassembly has three and end to end in proper order, is located the prelude telescopic rod subassembly's front end articulates in one of them the body of rod, is located the afterbody telescopic rod subassembly's rear end articulates in another the body of rod.
Through the cooperation of telescopic link subassembly and frame, simulate four bar linkage's law of motion, this in-process because the telescopic link subassembly of prelude and afterbody is connected respectively in the frame of difference to the problem of telescopic link subassembly probably has the interference in the rotation process has been avoided.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further: the telescopic rod component is characterized in that a first sliding groove is formed in the rod body along the length direction, the telescopic rod component is inserted into the first sliding groove in a sliding mode, a first insertion hole is formed in the end portion of the first sliding groove, a limiting surface is arranged in the first insertion hole and used for limiting the supporting piece, and an insertion portion is arranged at the end portion of the supporting piece and inserted into the first insertion hole.
Further: the frame further includes: the first positioning assembly is used for detachably connecting the rod body to the supporting piece. The beneficial effect of this step: the support piece is detachably connected with the rod body through the first positioning assembly, so that the machine frame is convenient to assemble, and the carrying convenience of the teaching aid is improved.
Further: the first positioning component comprises: the screw rod comprises a first screw part and a second screw part, the first screw part is inserted into a first through hole formed in the rod body, the second screw part is in threaded connection with the first screw part after passing through a second through hole formed in the rod body, and the end part of the second screw part is pressed on the surface of the supporting piece. The beneficial effect of this step: realize the function that screw two is connected in the body of rod through screw one to the easy trade nature of part has been improved, because if directly set up the screw hole on the body of rod, when this screw hole is destroyed, need change the body of rod, just can continue connecting thread spare two, so, after introducing screw one, only need change screw one can.
Further: the rod body is provided with two first scales along length direction, and two first scales are followed the width direction interval of the rod body sets up, the orientation of first scale is opposite. The beneficial effect of this step: through opposite first scales, scales can be observed conveniently on two sides of the rack.
Further: further comprising:
the first connecting assembly is used for slidably hinging the telescopic rod assembly to the rod body;
and the second connecting assembly is used for hinging the telescopic rod assembly at the middle part with the telescopic rod assemblies at the head end and the tail end.
Further: the first connecting component comprises: the sliding part is arranged on the rod body in a sliding mode, one end of the telescopic rod is connected to the sliding part through the connecting part, and the positioning part is connected to the sliding part and used for locking the sliding part on the rod body.
Further: the second connecting assembly comprises: the connecting rod component comprises a shaft body, a second connecting piece and an isolating piece, wherein the shaft body is arranged between the adjacent telescopic rod components, the second connecting piece is connected to the shaft body and used for positioning the telescopic rod components on the shaft body, and the isolating piece is arranged between the connected telescopic rod components and used for increasing the distance between the telescopic rod components. The beneficial effect of this step: the distance between the telescopic rod components is increased through the isolating pieces, and therefore the requirement of the distance between the rod bodies is met.
Further: the telescopic rod assembly comprises: the positioning device comprises a first rod, a second positioning assembly and a limiting part, wherein the first rod is inserted into the second rod in a sliding manner, the second positioning assembly is arranged between the first rod and the second rod and used for locking the first rod to the second rod, the limiting part is arranged between the first rod and the second rod and used for limiting the maximum distance from the first rod to the outer side of the second rod. The beneficial effect of this step: the first rod is prevented from falling off from the second rod in the sliding process of the first rod in the second rod through the limiting piece.
Further: further comprising: mounting, locating component three, the mounting connect in telescopic link subassembly is arranged in the pen of fixed setting-out usefulness, and locating component three is arranged in fixing a position the pen in the mounting.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. by the aid of the rack with the double-layer structure, the problem that interference possibly exists when the two cranks do full-circle motion when the four-connecting-rod mechanism simulates a double-crank mechanism is solved;
2. the detachable frame and the detachable frame are detachably connected to the bottom plate and the detachable telescopic rod assembly, so that the teaching aid for demonstration of the four-bar linkage mechanism has the characteristics of convenience in carrying and assembly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic diagram of a three-dimensional structure of the present invention;
fig. 2 is a schematic diagram of a three-dimensional structure of the present invention;
FIG. 3 is a first schematic three-dimensional view of the telescoping rod assembly;
FIG. 4 is a schematic three-dimensional view of the telescoping rod assembly;
fig. 5 is a three-dimensional schematic diagram of the present invention.
Wherein the content of the first and second substances,
1, a rack, 101 a rod body, 102 a support piece, 103 a first positioning component, 104 a first sliding groove, 105 a first insertion hole, 106 an insertion part, 107 a limiting surface, 108 a first screw part, 109 a second screw part, 110 a first through hole, 111 a second through hole, 112 a positioning hole, 113 a first scale and 114 a hook part;
2, a telescopic rod assembly, a 201 jack II, a 202 rod I, a 203 rod II, a 204 positioning assembly II, a 205 limiting piece, a 206 jack III, a 207 mounting hole, a 208 positioning groove, a 209 guide groove and 210 graduation II;
3, a bottom plate, 301 a chute III;
4, connecting a component I, a 401 sliding part, a component I402, a component I403, a sliding part 404, a connecting end 405 and a sliding groove 406;
5, connecting a component II, a shaft body 501, a connecting component II 502, a partition 503, a knob end 504 and a plug end 505;
6, fixing parts;
7, positioning a third component;
and 8, positioning piece II.
Detailed Description
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; the mechanical connection can be realized by selecting a proper connection mode in the prior art, such as welding, riveting, threaded connection, bonding, pin connection, key connection, elastic deformation connection, buckle connection, interference connection and injection molding; or an electrical connection, transmitting energy or signals by electricity; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As shown in fig. 1, a teaching aid for demonstration of a four-bar linkage mechanism includes: frame 1, telescopic link assembly 2, bottom plate 3, frame 1 slides and sets up in bottom plate 3, and telescopic link assembly 2 installs in frame 1, and frame 1 includes: the body of rod 101, support piece 102, the body of rod 101 has two and along horizontal setting, two bodies of rod 101 set up along vertical interval, support piece 102 has two and symmetry respectively and sets up in the left and right sides of the body of rod 101, support piece 102 detachable connects between the body of rod 101 and is used for fixing a position the body of rod 101, telescopic link subassembly 2 has threely and end to end in proper order, the front end that is located telescopic link subassembly 2 of prelude articulates in one of them body of rod 101, the rear end that is located telescopic link subassembly 2 of afterbody articulates in another body of rod 101.
As shown in fig. 2, the rack 1 further includes: a first positioning component 103, the first positioning component 103 is used for detachably connecting the rod body 101 to the support member 102, the rod body 101 is provided with a first sliding groove 104 along the length direction, the first sliding groove 104 is positioned at the front end of the head telescopic rod component 2 and the rear end of the tail telescopic rod component 2 and is slidably inserted into the first sliding groove 104, the end part of the first sliding groove 104 is provided with a first insertion hole 105, the end part of the support member 102 is provided with an insertion part 106, the insertion part 106 is a square bulge, the shape of the first insertion hole 105 is matched with that of the insertion part 106, the insertion part 106 is inserted in the first insertion hole 105, the first insertion hole 105 is provided with a limiting surface 107, the limiting surface 107 is used for limiting the position of the supporting member 102, specifically, the limiting surface 107 is the innermost surface of the first insertion hole 105 along the insertion direction of the insertion part 106, the insertion depth of the first insertion hole 105 is limited by the limiting surface 107, so that the support member 102 is positioned, the first positioning assembly 103 is convenient to position the support member 102, and the integral stability of the rack 1 is improved.
As shown in fig. 2, the first positioning component 103 includes: in the embodiment, the first screw member 108 and the second screw member 109 are provided, the first screw member 108 is a nut, the second screw member 109 is a rubber head screw, a butterfly screw and other parts which are convenient for manual rotation, the first through hole 110 is formed on the left side end surface and the right side end surface of the rod body 101 respectively, the shape of the first through hole 110 is matched with that of the first screw member 108, the first through hole 110 is arranged in a direction parallel to the insertion direction of the insertion part 106, the first screw member 108 is inserted into the first through hole 110, the rear side surface of the rod body 101 is provided with a second through hole 111, the second through hole 111 is arranged in a direction perpendicular to the first through hole 110, the second through hole 111 is communicated with the first through hole 110, the second through hole 111 is further communicated with the first insertion hole 105, the second screw member 109 is connected to the first screw member 108 through the second through hole 111 and is pressed on the surface of the support member 102, so that the insertion part 106 is stably positioned in the first insertion hole 105 through the static friction force of the second screw member 109, the insertion part 106 is further provided with a positioning hole 112 corresponding to the second screw member 109, the end part of the second screw member 109 is inserted into the positioning hole 112, so that the positioning stability of the inserting part 106 is improved, and the inserting part 106 is prevented from being separated from the first inserting hole 105 under the condition of insufficient static friction force.
As shown in fig. 1, the rod body 101 is provided with two first scales 113 along the length direction, the two first scales 113 are arranged on the front side and the rear side of the upper surface of the rod body 101 at intervals along the width direction of the rod body 101, and the orientations of the two first scales 113 are opposite, so that the readings of the first scales 113 can be observed conveniently from the two sides, and a teacher can give a lecture one-to-many or one-to-many face-to-face.
As shown in fig. 2, the teaching aid for demonstration of the four-bar linkage mechanism further comprises: coupling assembling 4, coupling assembling two 5, coupling assembling 4 are used for articulating telescopic link subassembly 2 in body of rod 101 in the slip, and coupling assembling two 5 are used for articulating the telescopic link subassembly 2 at middle part and the telescopic link subassembly 2 at head and the tail both ends.
As shown in fig. 2, the connecting member one 4 includes: the telescopic rod assembly 2 comprises a sliding part 401, a first connecting part 402 and a first positioning part 403, wherein the sliding part 401 is slidably arranged on the rod body 101, one end of the telescopic rod assembly 2 is connected to the sliding part 401 through the first connecting part 402, and the first positioning part 403 is connected to the sliding part 401 and used for locking the sliding part 401 to the rod body 101.
As shown in fig. 2, a sliding portion 404 is arranged at the lower end of the sliding member 401, the sliding portion 404 is in a disc shape, the sliding portion 404 is slidably inserted into the first sliding groove 104, a connecting end 405 is further convexly arranged on the sliding member 401, the connecting end 405 is in a cylindrical shape and is vertically arranged, an external thread is arranged on the periphery of the end portion, away from the sliding portion 404, of the connecting end 405, a second insertion hole 201 is formed in the end portion of the telescopic rod assembly 2, the connecting end 405 is inserted into the second insertion hole 201, the connecting end 405 penetrates through the second insertion hole 201 and then is connected with a first connecting member 402, the first connecting member 402 is a nut, one end of the telescopic rod assembly 2 is rotationally locked to the connecting end 405 through the nut, one end of the sliding member 101 is provided with a pointer corresponding to the first scale 113, and the pointer is convenient for reading a numerical value of position information.
As shown in fig. 2, the sliding member 401 further has a second sliding groove 406, the rod body 101 is slidably inserted into the second sliding groove 406, the sliding stability of the sliding member 401 on the rod body 101 is improved through the second sliding groove 406, the outer wall of the sliding member 401 is provided with a threaded through hole perpendicular to the second sliding groove 406, the first positioning member 403 has a threaded end, the first positioning member 403 can adopt a glue head screw, a butterfly screw and other parts which are convenient for manual rotation, and the threaded end of the first positioning member 403 is screwed into the threaded through hole and then presses the outer wall of the rod body 101, so that the locking function is realized.
As shown in fig. 2, the second connecting member 5 includes: shaft body 501, two connecting pieces 502, barrier member 503, shaft body 501 set up between adjacent telescopic link assembly 2, two connecting pieces 502 connect in shaft body 501 and be used for being fixed a position telescopic link assembly 2 in shaft body 501, barrier member 503 sets up between the telescopic link assembly 2 that links to each other and is used for increasing the interval between the telescopic link assembly 2 to this matches the interval between two body of rod 101.
As shown in fig. 2, the shaft body 501 includes: knob end 504, plug end 505, connecting piece two 502 adopts the nut, plug end 505 is cylindrical, knob end 504 sets up in the one end of plug end 505, the other end of plug end 505 is provided with the external screw thread, plug end 505 inserts respectively and locates between middle part telescopic link subassembly 2 and two telescopic link subassemblies 2 of head and the tail, and be connected the telescopic link subassembly 2 in middle part and the telescopic link subassembly 2 at head and the tail both ends through connecting piece two 502, isolator 503 is cylindricly, isolator 503 sets up between two telescopic link subassemblies 2 and the middle part of locating plug end 505 in the cover, with this interval between the telescopic link subassembly 2 that increases.
As shown in fig. 3, the telescopic rod assembly 2 includes: the first positioning assembly comprises a first rod 202, a second rod 203, a second positioning assembly 204 and a limiting piece 205, wherein one end of the second rod 203 is provided with a third insertion hole 206 along the length direction, the first rod 202 is slidably inserted into the third insertion hole 206, the second positioning assembly 204 and the first positioning assembly 103 are identical in structure, the second positioning assembly 204 is arranged between the first rod 202 and the second rod 203 and locks the first rod 202 to the second rod 203 by adopting the same principle as the first positioning assembly 103 locks the insertion part 106, the limiting piece 205 is arranged between the first rod 202 and the second rod 203, and the limiting piece 205 is used for limiting the maximum distance of the first rod 202 extending out of the second rod 203.
As shown in fig. 3 and 4, the limiting member 205 is a spring positioning bead, a mounting hole 207 is formed in a groove wall of the third insertion hole 206, the spring positioning bead is mounted in the mounting hole 207, the positioning bead in the spring positioning bead is arranged toward the surface of the first rod 202, the front end portion of the positioning bead protrudes into the third insertion hole 206, the end portion of the surface of the first rod 202 corresponds to the positioning bead and is provided with an arc-shaped positioning groove 208, when the positioning groove 208 moves to the positioning bead, the positioning bead enters the positioning groove 208 and limits the first rod 202, an arc-shaped guide groove 209 is further formed in the end portion of the first rod 202 on the same side as the positioning groove 208, the guide groove 209 is arranged at the outermost side of the first rod 202, and when the end portion of the first rod 202 is inserted into the third insertion hole 206 through the guide groove 209, the positioning bead contacts with the guide groove 209, so as to prevent the positioning bead from contacting with an edge of the end portion of the first rod 202.
As shown in fig. 3, the second scale 210 is arranged on the upper surfaces of the first rod 202 and the second rod 203 along the length direction, the zero position of the second scale 210 on the first rod 202 corresponds to the rotation point of the first rod 202, and the zero position of the second scale 210 on the second rod 203 corresponds to the rotation point of the second rod 203.
As shown in fig. 1, the teaching aid for demonstration of the four-bar linkage mechanism further comprises: mounting 6, locating component three 7, mounting 6 is for offering the through-hole that is used for inserting the setting-out pen, and locating component three 7 is fixed a position the pen in mounting 6 through adopting the principle the same with locating component 103 locking grafting portion 106 with the structure of locating component 103 the same, and the pen can adopt whiteboard pen, chalk etc. through following the telescopic link subassembly 2 motion at bottom plate 3 setting-out to be convenient for study telescopic link subassembly 2 motion law.
As shown in fig. 5, the left and right sides of the bottom surface of the bottom plate 3 are provided with symmetrically arranged sliding grooves three 301 along the front-back direction, the left and right ends of the rod body 101 located below are respectively provided with a hook 114 protruding downwards, the hook 114 is slidably inserted into the sliding grooves three 301, one side surface of the sliding groove three 301 is an inclined surface, the other opposite side surface is a vertical surface, thus forming a structure with the groove bottom as a small end and the notch as a big end, the shape of the hook part 114 is matched with the shape of the sliding groove III 301, therefore, the sliding stability of the hook part 114 in the sliding groove III 301 is improved through mutual extrusion of the inclined surfaces, a second positioning piece 8 is further arranged between the bottom plate 3 and the lower rod body 101, the second positioning piece 8 can adopt parts such as a rubber head screw, a butterfly screw and the like which can be conveniently manually rotated, the second positioning piece 8 is in threaded connection with the hook part 114, and the second positioning piece 8 is pressed on the bottom plate 3 through a threaded end to realize the positioning of the rack 1 on the bottom plate 3; the body of rod 101 all adopts photosensitive resin with support piece 102, for metal frame 1, very big reduction the holistic weight of this kind of teaching aid.
When the teaching aid for demonstration of the four-bar linkage is used, the positions of the head and tail telescopic rod assemblies 2 on the rod body 101 and the lengths of the telescopic rod assemblies 2 are adjusted, so that the lengths of all sides of the four-bar linkage are adjusted, and the motion rule of the four-bar linkage is simulated by changing the length of all sides.
This kind of teaching aid for demonstration of four-bar linkage has following advantage:
1. by the aid of the rack with the double-layer structure, the problem that interference possibly exists when the two cranks do full-circle motion when the four-connecting-rod mechanism simulates a double-crank mechanism is solved;
2. the detachable frame and the detachable frame are detachably connected to the bottom plate and the detachable telescopic rod assembly, so that the teaching aid for demonstration of the four-bar linkage mechanism has the characteristics of convenience in carrying and assembly.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (10)
1. A teaching aid for demonstration of a four-bar linkage mechanism is characterized by comprising:
a frame, the frame comprising:
the two rod bodies are arranged along the transverse direction and are arranged at intervals along the vertical direction;
the supporting piece is detachably connected between the rod bodies and used for positioning the rod bodies;
the bottom plate is arranged on the rack in a sliding manner;
the telescopic rod subassembly, telescopic rod subassembly has three and end to end in proper order, is located the prelude telescopic rod subassembly's front end articulates in one of them the body of rod, is located the afterbody telescopic rod subassembly's rear end articulates in another the body of rod.
2. A teaching aid for demonstration of a four-bar linkage according to claim 1, wherein the rod body is provided with a first sliding groove along the length direction, the telescopic rod assembly is slidably inserted into the first sliding groove, the end of the first sliding groove is provided with a first insertion hole, a limiting surface is arranged in the first insertion hole and used for limiting a supporting piece, the end of the supporting piece is provided with an insertion part, and the insertion part is inserted into the first insertion hole.
3. A teaching aid for demonstration of a four bar linkage according to claim 2, wherein the frame further comprises: the first positioning assembly is used for detachably connecting the rod body to the supporting piece.
4. A teaching aid for demonstration of a four bar linkage according to claim 3, wherein the first positioning assembly comprises: the screw rod comprises a first screw part and a second screw part, the first screw part is inserted into a first through hole formed in the rod body, the second screw part is in threaded connection with the first screw part after passing through a second through hole formed in the rod body, and the end part of the second screw part is pressed on the surface of the supporting piece.
5. A teaching aid for demonstration of a four-bar linkage according to claim 1, wherein the bar body is provided with two first scales along the length direction, the two first scales are arranged along the width direction of the bar body at intervals, and the first scales face in opposite directions.
6. A teaching aid for demonstration of a four-bar linkage according to claim 1, further comprising:
the first connecting assembly is used for slidably hinging the telescopic rod assembly to the rod body;
and the second connecting assembly is used for hinging the telescopic rod assembly at the middle part with the telescopic rod assemblies at the head end and the tail end.
7. A teaching aid for demonstration of a four bar linkage according to claim 6, wherein the first connection assembly comprises: the sliding part is arranged on the rod body in a sliding mode, one end of the telescopic rod is connected to the sliding part through the connecting part, and the positioning part is connected to the sliding part and used for locking the sliding part on the rod body.
8. A teaching aid for demonstration of a four bar linkage according to claim 6, wherein the second connecting assembly comprises: the connecting rod component comprises a shaft body, a second connecting piece and an isolating piece, wherein the shaft body is arranged between the adjacent telescopic rod components, the second connecting piece is connected to the shaft body and used for positioning the telescopic rod components on the shaft body, and the isolating piece is arranged between the connected telescopic rod components and used for increasing the distance between the telescopic rod components.
9. A teaching aid for demonstration of a four-bar linkage according to claim 1, wherein the telescopic bar assembly comprises: the positioning device comprises a first rod, a second positioning assembly and a limiting part, wherein the first rod is inserted into the second rod in a sliding manner, the second positioning assembly is arranged between the first rod and the second rod and used for locking the first rod to the second rod, the limiting part is arranged between the first rod and the second rod and used for limiting the maximum distance from the first rod to the outer side of the second rod.
10. A teaching aid for demonstration of a four-bar linkage according to claim 1, further comprising: mounting, locating component three, the mounting connect in telescopic link subassembly is arranged in the pen of fixed setting-out usefulness, and locating component three is arranged in fixing a position the pen in the mounting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120817639.4U CN214475971U (en) | 2021-04-20 | 2021-04-20 | Teaching aid for demonstration of four-bar linkage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120817639.4U CN214475971U (en) | 2021-04-20 | 2021-04-20 | Teaching aid for demonstration of four-bar linkage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214475971U true CN214475971U (en) | 2021-10-22 |
Family
ID=78179919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120817639.4U Expired - Fee Related CN214475971U (en) | 2021-04-20 | 2021-04-20 | Teaching aid for demonstration of four-bar linkage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214475971U (en) |
-
2021
- 2021-04-20 CN CN202120817639.4U patent/CN214475971U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211022 |