CN211237530U - Open-close type mechanical principle demonstration teaching aid - Google Patents
Open-close type mechanical principle demonstration teaching aid Download PDFInfo
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- CN211237530U CN211237530U CN201721844219.5U CN201721844219U CN211237530U CN 211237530 U CN211237530 U CN 211237530U CN 201721844219 U CN201721844219 U CN 201721844219U CN 211237530 U CN211237530 U CN 211237530U
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Abstract
The utility model discloses an open-close type mechanical principle demonstration teaching aid, which is characterized by comprising a frame, an open-close mechanism and an open-close driving mechanism, wherein the open-close mechanism is arranged at the upper end of the frame, the open-close driving mechanism comprises a push rod, a slider-crank mechanism, a rocker-crank mechanism and a rotation driving device, the rotation driving device is fixed on the frame and is connected with the slider-crank mechanism, a vertical slideway is fixedly arranged on the frame, the slider-crank mechanism and the rocker-crank mechanism are both in sliding fit with the slideway, the slider-crank mechanism pushes the rocker mechanism to move, the rocker-crank mechanism is connected with the push rod, the open-close mechanism comprises a top seat and a plurality of groups of four-bar mechanisms which have the same structure and are distributed along the circumferential direction, the top seat is fixedly connected with the upper end of the; the device has the advantages that students can visually and specifically know the motion trail and the motion principle of each mechanism, and the device is helpful for the students to better master the knowledge of the mechanical principle; and the structure is small and exquisite, convenient to carry.
Description
Technical Field
The utility model relates to a demonstration teaching aid for classroom or experiment teaching especially relates to an open-close type mechanical principle demonstration teaching aid.
Background
The mechanical principle is a core course of mechanical major, most of the existing mechanical principle teaching is principle concept and calculation, and few examples in class teaching result in the disjunction of the theory and practice of contemporary college students, so that the learned knowledge cannot be well applied to the practice. In order to make the course teaching of the mechanical principle more effective and enable students to understand the theoretical knowledge of boring holes more fully, the use of the teaching aid is particularly important.
Disclosure of Invention
The utility model aims to solve the technical problem that a can carry out the entity demonstration to the motion process of multiple not isostructure in the mechanical principle course is provided for the vivid effectual open-close type mechanical principle demonstration teaching aid of course teaching.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: an open-close type mechanical principle demonstration teaching aid comprises a rack, an open-close mechanism and an open-close driving mechanism, wherein the open-close mechanism is arranged at the upper end of the rack, the open-close driving mechanism comprises a push rod, a slider-crank mechanism, a rocker-crank mechanism and a rotation driving device, the rotation driving device is fixed on the rack and is connected with the slider-crank mechanism, a vertical slide way is fixedly arranged on the rack, the slider-crank mechanism and the rocker-crank mechanism are in sliding fit with the slide way, the slider-crank mechanism pushes the rocker-crank mechanism to move, the rocker-crank mechanism is connected with the push rod to drive the open-close mechanism to open and close, the open-close mechanism comprises a top seat and a plurality of groups of four-bar mechanisms which have the same structure and are distributed along the circumferential direction, the top seat is fixedly connected with the upper end of the push rod, the four-bar linkage is respectively hinged with the upper end of the frame and the top seat.
Further, the rotation driving device comprises a motor, a worm wheel, a worm, a first bevel gear, a second bevel gear, a first wheel shaft and a second wheel shaft, the motor is fixed on the rack, the worm is coaxially and fixedly connected with a driving shaft of the motor, the first wheel shaft and the second wheel shaft are both in shaft connection with the rack and are perpendicular to each other, the worm wheel and the first bevel gear are coaxially and fixedly connected with the first wheel shaft respectively, the worm wheel is meshed with the worm, the second bevel gear is coaxially and fixedly connected with the second wheel shaft, and the second bevel gear is meshed with the first bevel gear.
Furthermore, the crank block mechanism comprises a first block, a first connecting rod and a second connecting rod, the first block is vertically matched with the slideway in a sliding manner, the upper end of the first connecting rod is hinged with the first block, the lower end of the first connecting rod is hinged with one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected with the second wheel shaft.
Further, the crank rocker mechanism comprises a second sliding block, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod and a seventh connecting rod, the second sliding block is vertically matched with the slideway in a sliding manner and is positioned above the first sliding block, the lower end of the third connecting rod is hinged with the second sliding block, the upper end of the third connecting rod, one end of the fourth connecting rod, the lower end of the fifth connecting rod and the lower end of the sixth connecting rod are hinged, the other end of the fourth connecting rod is hinged on the rack, the upper end of the fifth connecting rod is hinged on the push rod, the upper end of the sixth connecting rod is hinged with one end of the seventh connecting rod, the other end of the seventh connecting rod is hinged on the rack, and a spring is fixedly connected between the upper end of the fifth connecting rod and the other end of the seventh connecting rod, the frame is fixedly provided with a cam seat, the cam seat is in shaft connection with a cam shaft, the cam shaft is fixedly provided with a cam, the cam shaft is linked with the first wheel shaft through a belt pulley assembly, when the crank and rocker mechanism is at the top dead center position, the opening and closing mechanism is in a closed state, the cam is used for unlocking the top dead center state of the crank and rocker mechanism, when the crank and rocker mechanism is at the bottom dead center position, the opening and closing mechanism is in an open state, and the spring is used for unlocking the bottom dead center state of the crank and rocker mechanism.
Furthermore, the four-bar linkage mechanism comprises a first connecting bar, a second connecting bar, a third connecting bar and a fourth connecting bar, the lower end of the first connecting bar is hinged with the upper end of the frame, the upper end of the first connecting bar is hinged on the third connecting bar, the lower end of the second connecting bar is hinged on the first connecting bar, the upper end of the second connecting bar is hinged on the top seat, the lower end of the third connecting bar is hinged on the lower end of the fourth connecting bar, the upper end of the third connecting bar is a free end, and the upper end of the fourth connecting bar is hinged on the second connecting bar.
Compared with the prior art, the utility model has the advantages that the open-close type mechanical principle demonstration teaching aid perfectly combines various mechanisms (such as a crank slider mechanism, a crank rocker mechanism, a four-bar mechanism, a cam mechanism, a gear mechanism and the like) in the mechanical principle course, and performs entity demonstration on the motion process of each mechanism, and vividly explains the cooperation among the mechanisms, so that students can intuitively and specifically know the motion trail and the motion principle of each mechanism, and the open-close type mechanical principle demonstration teaching aid is helpful for the students to better master the knowledge of the mechanical principle; in addition, the mechanical principle demonstration teaching aid can realize the opening and closing and intermittent motion of the opening and closing mechanism, and can also be used as equipment capable of realizing opening and closing.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
fig. 2 is a schematic view of the state that the crank slider mechanism of the present invention pushes the crank rocker mechanism to be at the top dead center;
fig. 3 is a schematic view of the state of the crank-rocker mechanism of the present invention at the bottom dead center.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in the figure, the open-close type mechanical principle demonstration teaching aid comprises a rack 1, an open-close mechanism and an open-close driving mechanism, wherein the open-close mechanism is arranged at the upper end of the rack 1, the open-close driving mechanism comprises a push rod 2, a slider-crank mechanism, a crank-rocker mechanism and a rotation driving device, the rotation driving device is fixed on the rack 1 and is connected with the slider-crank mechanism, a vertical slide way 3 is fixedly arranged on the rack 1, the slider-crank mechanism and the crank-rocker mechanism are both in sliding fit with the slide way 3, the slider-crank mechanism pushes the crank-rocker mechanism to move, and the crank-rocker mechanism is connected with the push rod 2 to drive;
the rotation driving device comprises a motor 4, a worm wheel 5, a worm 6, a first bevel gear 7, a second bevel gear 8, a first wheel shaft 9 and a second wheel shaft 10, the motor 4 is fixed on a frame 1, the worm 6 is coaxially and fixedly connected with a driving shaft of the motor 4, the first wheel shaft 9 and the second wheel shaft 10 are both axially connected on the frame 1 and are perpendicular to each other, the worm wheel 5 and the first bevel gear 7 are respectively coaxially and fixedly connected with the first wheel shaft 9, the worm wheel 5 is meshed with the worm 6, the second bevel gear 8 is coaxially and fixedly connected with the second wheel shaft 10, the second bevel gear 8 is meshed with the first bevel gear 7, a slider-crank mechanism comprises a first slider 11, a first connecting rod 12 and a second connecting rod 13, the first slider 11 is vertically matched with the slideway 3 in a sliding manner, the upper end of the first connecting rod 12 is hinged with the first slider 11, and the lower end of the first connecting rod 12 is hinged with, the other end of the second connecting rod 13 is fixedly connected with the second wheel shaft 10;
the crank rocker mechanism comprises a second sliding block 14, a third connecting rod 15, a fourth connecting rod 16, a fifth connecting rod 17, a sixth connecting rod 18 and a seventh connecting rod 19, the second sliding block 14 is vertically matched with the slide way 3 in a sliding way and is positioned above the first sliding block 11, the lower end of the third connecting rod 15 is hinged with the second sliding block 14, the upper end of the third connecting rod 15, one end of the fourth connecting rod 16, the lower end of the fifth connecting rod 17 and the lower end of the sixth connecting rod 18 are hinged, the other end of the fourth connecting rod 16 is hinged on the rack 1, the upper end of the fifth connecting rod 17 is hinged on the push rod 2, the upper end of the sixth connecting rod 18 is hinged with one end of the seventh connecting rod 19, the other end of the seventh connecting rod 19 is hinged on the rack 1, a spring 20 is fixedly connected between the upper end of the fifth connecting rod 17 and the other end of the seventh connecting rod 19, a cam seat 21, a cam shaft (not shown in the figure) is coupled on the cam seat 21, a cam 22 is fixedly arranged on the cam shaft (not shown in the figure), the cam shaft (not shown in the figure) is linked with the first wheel shaft 9 through a belt pulley assembly 23, when the crank and rocker mechanism is at the top dead center position, the opening and closing mechanism is in a closed state, the cam 22 is used for unlocking the top dead center state of the crank and rocker mechanism, when the crank and rocker mechanism is at the bottom dead center position, the opening and closing mechanism is in an open state, and the spring 20 is used for unlocking the bottom dead center state of the crank and rocker mechanism;
the opening and closing mechanism comprises a top seat 24 and a plurality of groups of four-bar mechanisms which are identical in structure and distributed along the circumferential direction, the top seat 24 is fixedly connected with the upper end of the push rod 2, the four-bar mechanisms are hinged with the upper end of the rack 1 and the top seat 24 respectively, each four-bar mechanism comprises a first connecting bar 25, a second connecting bar 26, a third connecting bar 27 and a fourth connecting bar 28, the lower end of the first connecting bar 25 is hinged with the upper end of the rack 1, the upper end of the first connecting bar 25 is hinged on the third connecting bar 27, the lower end of the second connecting bar 26 is hinged on the first connecting bar 25, the upper end of the second connecting bar 26 is hinged with the top seat 24, the lower end of the third connecting bar 27 is hinged with the lower end of the fourth connecting bar 28, the upper end of the third connecting bar 27 is a free end, and the upper end of the.
In the above embodiment, the motion process of this open-close type mechanical principle demonstration teaching aid is: the motor 4 works to drive the cam 22 and the second connecting rod 13 in the crank-rocker mechanism to rotate at the same time, the second connecting rod 13 pushes the first slider 11 to move upwards through the first connecting rod 12, the first slider 11 pushes the second slider 14 in the crank-rocker mechanism to move upwards, so that the fifth connecting rod 17 pushes the push rod 2 to move upwards, the push rod 2 drives the top seat 24 in the opening and closing mechanism to move upwards, the top seat 24 drives a plurality of four-bar mechanisms to synchronously rotate inwards to realize the closing of the opening and closing mechanism, when the first sliding block 11 moves up to the highest point, the sixth connecting rod 18 and the seventh connecting rod 19 in the crank and rocker mechanism are overlapped, at this time, the crank and rocker mechanism is in the top dead center state, as shown in fig. 2, when the second connecting rod 13 drives the first sliding block 11 to move downwards for a certain distance, the cam 22 beats the sixth connecting rod 18 to unlock the top dead center state of the crank rocker mechanism, and during the period, the opening and closing mechanism is in a closed intermittent state; after the top dead center state of the crank-rocker mechanism is unlocked, under the action of the dead weights of the push rod 2 and the crank-rocker mechanism, the second slider 14 is pushed to slide downwards, the push rod 2 drives the top seat 24 in the opening-closing mechanism to move downwards, the top seat 24 drives the four-link mechanisms to synchronously rotate outwards to open the opening-closing mechanism, when the second slider 14 slides downwards to the lowest point, the third connecting rod 15 and the fourth connecting rod 16 are on the same straight line, at the moment, the crank-rocker mechanism is in the bottom dead center state, as shown in fig. 3, the spring 20 is compressed, when the second connecting rod 13 repeatedly drives the first slider 11 to move upwards, the spring 20 pushes the fifth connecting rod 17 (namely the push rod 2) to move upwards under the action of elastic force to unlock the bottom dead center state of the crank-rocker mechanism, and during the opening-closing mechanism is in the open intermittent state.
Claims (5)
1. An open-close type mechanical principle demonstration teaching aid is characterized by comprising a rack, an open-close mechanism and an open-close driving mechanism, wherein the open-close mechanism is arranged at the upper end of the rack, the open-close driving mechanism comprises a push rod, a slider-crank mechanism, a rocker-crank mechanism and a rotation driving device, the rotation driving device is fixed on the rack and is connected with the slider-crank mechanism, a vertical slide way is fixedly arranged on the rack, the slider-crank mechanism and the rocker-crank mechanism are in sliding fit with the slide way, the slider-crank mechanism pushes the rocker-crank mechanism to move, the rocker-crank mechanism is connected with the push rod to drive the open-close mechanism to open and close, the open-close mechanism comprises a top seat and a plurality of groups of four-bar mechanisms which have the same structure and are distributed along the circumferential direction, the top seat is fixedly connected with the upper end of the push rod, and the four-bar linkage is respectively hinged with the upper end of the rack and the top seat.
2. An open-close type mechanical principle demonstration teaching aid as claimed in claim 1, characterized in that: the rotation driving device comprises a motor, a worm gear, a worm, a first bevel gear, a second bevel gear, a first wheel shaft and a second wheel shaft, wherein the motor is fixed on the rack, the worm is coaxially and fixedly connected with a driving shaft of the motor, the first wheel shaft and the second wheel shaft are both axially connected on the rack and are perpendicular to each other, the worm gear and the first bevel gear are respectively coaxially and fixedly connected with the first wheel shaft, the worm gear is meshed with the worm, the second bevel gear is coaxially and fixedly connected with the second wheel shaft, and the second bevel gear is meshed with the first bevel gear.
3. An open-close type mechanical principle demonstration teaching aid as claimed in claim 2, characterized in that: the crank block mechanism comprises a first block, a first connecting rod and a second connecting rod, the first block is vertically matched with the slideway in a sliding mode, the upper end of the first connecting rod is hinged to the first block, the lower end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected with the second wheel shaft.
4. An open-close type mechanical principle demonstration teaching aid as claimed in claim 3, wherein: the crank rocker mechanism comprises a second sliding block, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod and a seventh connecting rod, the second sliding block is vertically matched with the slide way in a sliding manner and is positioned above the first sliding block, the lower end of the third connecting rod is hinged with the second sliding block, the upper end of the third connecting rod, one end of the fourth connecting rod, the lower end of the fifth connecting rod and the lower end of the sixth connecting rod are hinged, the other end of the fourth connecting rod is hinged on the rack, the upper end of the fifth connecting rod is hinged on the push rod, the upper end of the sixth connecting rod is hinged with one end of the seventh connecting rod, the other end of the seventh connecting rod is hinged on the rack, and a spring is fixedly connected between the upper end of the fifth connecting rod and the other end of the seventh connecting rod, the frame is fixedly provided with a cam seat, the cam seat is in shaft connection with a cam shaft, the cam shaft is fixedly provided with a cam, the cam shaft is linked with the first wheel shaft through a belt pulley assembly, when the crank and rocker mechanism is at the top dead center position, the opening and closing mechanism is in a closed state, the cam is used for unlocking the top dead center state of the crank and rocker mechanism, when the crank and rocker mechanism is at the bottom dead center position, the opening and closing mechanism is in an open state, and the spring is used for unlocking the bottom dead center state of the crank and rocker mechanism.
5. An open-close type mechanical principle demonstration teaching aid as claimed in claim 1, characterized in that: the four-bar linkage mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, wherein the lower end of the first connecting rod is hinged with the upper end of the rack, the upper end of the first connecting rod is hinged on the third connecting rod, the lower end of the second connecting rod is hinged on the first connecting rod, the upper end of the second connecting rod is hinged on the top seat, the lower end of the third connecting rod is hinged on the lower end of the fourth connecting rod, the upper end of the third connecting rod is a free end, and the upper end of the fourth connecting rod is hinged on the second connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721844219.5U CN211237530U (en) | 2017-12-26 | 2017-12-26 | Open-close type mechanical principle demonstration teaching aid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721844219.5U CN211237530U (en) | 2017-12-26 | 2017-12-26 | Open-close type mechanical principle demonstration teaching aid |
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| CN211237530U true CN211237530U (en) | 2020-08-11 |
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| CN201721844219.5U Active CN211237530U (en) | 2017-12-26 | 2017-12-26 | Open-close type mechanical principle demonstration teaching aid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108022499A (en) * | 2017-12-26 | 2018-05-11 | 宁波大学 | A kind of open-close type theory of mechanics demonstration teaching aid |
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- 2017-12-26 CN CN201721844219.5U patent/CN211237530U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108022499A (en) * | 2017-12-26 | 2018-05-11 | 宁波大学 | A kind of open-close type theory of mechanics demonstration teaching aid |
| CN108022499B (en) * | 2017-12-26 | 2023-11-14 | 宁波大学 | Open-close type mechanical principle demonstration teaching aid |
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