CN220041250U - Simple model for mechanical experiment - Google Patents
Simple model for mechanical experiment Download PDFInfo
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- CN220041250U CN220041250U CN202222676795.0U CN202222676795U CN220041250U CN 220041250 U CN220041250 U CN 220041250U CN 202222676795 U CN202222676795 U CN 202222676795U CN 220041250 U CN220041250 U CN 220041250U
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Abstract
The utility model discloses a simple model for mechanics experiments, which comprises a workbench, a rotating plate and weight blocks used for being placed on the rotating plate, wherein a pair of support rods are fixedly arranged on the workbench, and a central rotating shaft is rotatably arranged on the support rods; one end of the rotating plate is integrally connected with a rotating plate sleeve which is sleeved and fixed on the central rotating shaft, a notch groove is formed in the middle of the rotating plate sleeve, a first fixed pulley is arranged in the notch groove, and the first fixed pulley is sleeved on the central rotating shaft in a rotating way; the first stay rope is bound and connected to the block hanging ring of the weight block, and the first other end of the first stay rope bypasses the first fixed pulley and is bound and connected with the hook end at the upper end of the spring dynamometer. The utility model has reasonable structural design, and the central axis of the fixed pulley I and the central axis of the central rotating shaft after assembly are arranged in a collinear way, so that the accuracy of mechanical experiment results can be effectively ensured, the error of the experiment results is smaller, and the analysis of learning and mastering forces of students is facilitated.
Description
Technical Field
The utility model relates to the field of mechanical experiments, in particular to a simple model for mechanical experiments.
Background
The mechanical experiment model is an expression of the mechanical relation according to the geometrical characteristics of the researched object, after the mechanical model is established, the mechanical model is mathematically described according to the basic rule of mechanical motion and the mechanical theorem, and the quantitative relation among mechanical quantities is established to obtain a mechanical equation, namely a mathematical model. In physical learning, mechanical experimental models are widely used, such as: in order to facilitate students to understand knowledge points such as force decomposition in the physical process, china patent utility model (publication date: CN205680336U, publication date: 2016.11.09) discloses a physical mechanical experiment device, the scheme adopts a telescopic rod and an adjusting knob to adjust the angle of a slope stably, a sliding block is connected to an A spring by a traction rope bypassing a fixed pulley, the deformation length of the A spring is read from a scale mark to obtain traction rope tension born by the sliding block, the top end of a weight box is connected to a B spring, the deformation length of the B spring is read from the scale mark to obtain tension born by the weight box, the demonstration process is visual, and the teaching efficiency is improved.
However, in this solution, the top end of the mounting plate is provided with a bevel through a rotation shaft, and the middle of the top end of the mounting plate is provided with a rotation shaft bracket on which a fixed pulley is mounted. Obviously, in this scheme the central axis of fixed pulley and the central axis of pivot are not in same straight line, and this just also makes the haulage rope between fixed pulley and the slider unable and keeps parallelism with the inclined plane, only can measure the angle value on inclined plane through this scheme, and can't measure the actual angle value of haulage rope (can't measure the pulling force direction promptly), and this can cause the experimental result deviation of pulling force decomposition great, is unfavorable for the student to understand knowledge points such as the decomposition of mastering the force.
Disclosure of Invention
The utility model aims to provide a simple model for mechanical experiments, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the simple model for the mechanical experiment comprises a workbench, a rotating plate and weight blocks used for being placed on the rotating plate, wherein a pair of support rods are fixedly arranged on the workbench, and a central rotating shaft is rotatably arranged on the support rods;
one end of the rotating plate is integrally connected with a rotating plate sleeve which is sleeved and fixed on the central rotating shaft, a notch groove is formed in the middle of the rotating plate sleeve, a first fixed pulley is arranged in the notch groove, and the first fixed pulley is sleeved on the central rotating shaft in a rotating way;
the first stay rope is bound and connected to the block hanging ring of the weight block, and the first other end of the first stay rope bypasses the first fixed pulley and is bound and connected with the hook end at the upper end of the spring dynamometer.
The structure design is that the central axis of the fixed pulley I and the central axis of the central rotating shaft after the assembly are arranged in a collinear way, no matter what angle position the rotating plate is, the pulling rope I between the fixed pulley I and the block hanging ring is always parallel to the rotating plate, that is, the pulling force direction applied to the weight block is always parallel to the rotating plate, and the pulling force direction applied to the weight block can be accurately measured by measuring the rotating angle of the rotating plate.
As a further scheme of the utility model, the utility model also comprises a rotating plate angle adjusting mechanism, wherein the rotating plate angle adjusting mechanism comprises a worm support, a worm wheel, a worm and an angle adjusting crank, the worm support is fixedly arranged on the side wall of the supporting rod, the worm is rotatably arranged on the worm support, and the end part of the worm is fixedly connected with the angle adjusting crank;
the worm wheel is fixedly sleeved at the end part of the central rotating shaft, and the worm wheel is connected with the worm in a meshed mode. After the angle adjustment of the rotating plate is performed by the rotating plate angle adjustment mechanism, the position of the rotating plate can be locked by utilizing the self-locking principle of the worm gear, other mechanisms are not needed for locking, and the angle adjustment operation is convenient.
As a further scheme of the utility model, the side wall of the supporting rod is fixedly provided with a protractor scale plate, and the side edge of the rotating plate is also provided with a side edge angle indication line.
The utility model further provides a weight pulling mechanism, which comprises a fixed pulley II, a guide rail frame, a screw rod, a nut block and a tension applying crank, wherein the fixed pulley II is rotatably arranged on a workbench;
the pull ring of the nut block is bound and connected with a second pull rope, and the other end of the second pull rope bypasses the second fixed pulley and is bound and connected with the hanging ring end at the lower end of the spring dynamometer.
As a further scheme of the utility model, the utility model further comprises a plurality of plugboards for providing different surface friction forces, and plugboard grooves for being in plug-in fit with the plugboards are formed in the rotating plate.
As a further scheme of the utility model, the workbench is fixedly provided with the plugboard frame for placing the plugboard, the side wall of the plugboard is fixedly connected with the plugboard handle, and the plugboard is convenient to insert and place by the arrangement of the plugboard handle.
As a further aspect of the utility model, the insert plate comprises a smooth glass insert plate, a wooden insert plate, a metal insert plate and/or a cotton insert plate covered with a cotton cloth layer.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model has reasonable structural design, the central axis of the fixed pulley I and the central axis of the central rotating shaft after assembly are arranged in a collinear way, no matter what angle position the rotating plate is positioned, the pull rope I between the fixed pulley I and the block hanging ring is always parallel to the rotating plate, and the direction of the pulling force applied to the weight block can be accurately measured by measuring the rotating angle of the rotating plate, thereby effectively ensuring the accuracy of the mechanical experiment result, having smaller experimental result error and being beneficial to students to learn and master the force decomposition;
2. after the angle of the rotating plate is adjusted by adopting the rotating plate angle adjusting mechanism, the position of the rotating plate can be locked by utilizing the self-locking principle of the worm gear, other mechanisms are not needed for locking, and the angle adjusting operation is convenient;
3. the magnitude of friction force when the weight blocks on different plugboards move is measured through experiments, so that students can understand the points of knowledge of the mechanics such as the operation friction force, and the plugboard is convenient to replace and operate.
Drawings
FIG. 1 is a schematic perspective view of a simple model for mechanical experiments at a first view angle;
FIG. 2 is a schematic diagram showing a perspective structure of a simple model for mechanical experiments at a second view angle;
FIG. 3 is a schematic diagram of a simplified model for mechanical experiments;
fig. 4 is a schematic top view of a simple model for mechanical experiments.
In the figure: 100-weight blocks, 101-block hanging rings, 1-working tables, 11-fixed pulleys II, 12-stay ropes II, 13-spring force measuring meters, 2-rotating plate angle adjusting mechanisms, 21-worm supports, 22-worms, 23-angle adjusting cranks, 24-worm gears, 3-fixed pulleys I, 31-stay ropes I, 4-connecting columns, 41-guide rail frames, 42-nut blocks, 43-lead screws, 44-tension applying cranks, 5-supporting rods, 51-protractor scale plates, 52-center rotating shafts, 6-rotating plates, 61-rotating plate sleeves, 62-side angle indicating lines, 63-notch grooves, 64-inserting plate grooves, 7-inserting plates and 71-inserting plate handles.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 3, a simple model for mechanical experiments comprises a workbench 1, a rotating plate 6 and a weight block 100 for being placed on the rotating plate 6, wherein a pair of support rods 5 are fixedly arranged on the workbench 1, and a central rotating shaft 52 is rotatably arranged on the support rods 5;
one end of the rotating plate 6 is integrally connected with a rotating plate sleeve 61 which is sleeved and fixed on the central rotating shaft 52, a notch groove 63 is formed in the middle of the rotating plate sleeve 61, a fixed pulley I3 is arranged in the notch groove 63, and the fixed pulley I3 is rotatably sleeved on the central rotating shaft 52;
the block hanging ring 101 of the weight block 100 is bound and connected with a first stay rope 31, and the other end of the first stay rope 31 bypasses the first fixed pulley 3 and is bound and connected with the hook end at the upper end of the spring dynamometer 13. Obviously, in this embodiment, the distance between the block suspension ring 101 and the rotating plate 6 is equal to the radial dimension of the annular groove of the fixed pulley one 3.
In this embodiment, when assembling, the first fixed pulley 3 is placed at the notch 63 of the rotating plate sleeve 61, then the central rotating shaft 52 is inserted and installed, the central rotating shaft 52 passes through the rotating plate sleeve 61 and the first fixed pulley 3, then the central rotating shaft 52 and the rotating plate sleeve 61 can be locked by bolts or screws, then the end of the central rotating shaft 52 is inserted into the upper end of the supporting rod 5, and finally, the pair of supporting rods 5 are fixed with the workbench 1, thus the assembling of the rotating plate 6 can be completed.
The utility model has reasonable structural design, the central axis of the fixed pulley I3 and the central axis of the central rotating shaft 52 after assembly are arranged in a collinear way, no matter what angle position the rotating plate 6 is positioned, the pull rope I31 between the fixed pulley I3 and the block hanging ring 101 is always parallel to the rotating plate 6, that is, the direction of the pulling force applied to the weight block 100 is always parallel to the rotating plate 6, and the direction of the pulling force applied to the weight block 100 can be accurately measured by measuring the rotating angle of the rotating plate 6, thereby effectively ensuring the accuracy of the mechanical experiment result, having smaller error of the experiment result and being beneficial to students to learn and master the decomposition of force.
As a specific scheme, the embodiment further comprises a rotating plate angle adjusting mechanism 2, the rotating plate angle adjusting mechanism 2 comprises a worm support 21, a worm wheel 24, a worm 22 and an angle adjusting crank 23, the worm support 21 is fixedly arranged on the side wall of the supporting rod 5, the worm 22 is rotatably arranged on the worm support 21, and the end part of the worm 22 is fixedly connected with the angle adjusting crank 23;
the worm wheel 24 is fixedly sleeved at the end part of the central rotating shaft 52, and the worm wheel 24 is in meshed connection with the worm 22.
The side wall of the supporting rod 5 is fixedly provided with a protractor scale plate 51, and the side edge of the rotating plate 6 is also provided with a side edge angle indication line 62.
The working principle of the utility model is as follows: when the angle of the rotating plate 6 needs to be adjusted, the worm 22 can be driven to rotate by shaking the angle adjusting crank 23, the rotating worm 22 drives the worm wheel 24 to rotate, and the rotating worm wheel 24 synchronously drives the central rotating shaft 52, the rotating plate sleeve 61 and the rotating plate 6, so that the angle adjustment of the rotating plate 6 can be realized; the angle of the rotating plate 6 in the current state can be measured by looking at the side angle indication line 62 and the protractor scale plate 51, and the operation and the use are convenient.
After the angle adjustment of the rotating plate 6 is performed by the rotating plate angle adjustment mechanism 2, the position of the rotating plate 6 can be locked by utilizing the self-locking principle of the worm gear, other mechanisms are not needed for locking, and the angle adjustment is convenient to operate.
As a further scheme, the embodiment can further comprise a weight pulling mechanism 4, wherein the weight pulling mechanism 4 comprises a fixed pulley II 11, a guide rail frame 41, a screw rod 43, a nut block 42 and a tension applying crank 44, the fixed pulley II 11 is rotatably installed on the workbench 1, the guide rail frame 41 is fixedly installed on the workbench 1, the guide rail frame 41 is rotatably installed with the screw rod 43, the end part of the screw rod 43 is fixedly connected with the tension applying crank 44, the guide rail frame 41 is also provided with the nut block 42 in a sliding fit manner, and the nut block 42 is sleeved on the screw rod 43 in a threaded fit manner; the pull ring of the nut block 42 is connected with a second pull rope 12 in a binding way, and the other end of the second pull rope 12 bypasses the second fixed pulley 11 and is connected with the hanging ring end of the lower end of the spring dynamometer 13 in a binding way.
The working principle of the weight pulling mechanism 4 is as follows: the screw 43 can be driven to rotate by shaking the pulling force applying crank 44, the nut block 42 is driven to transversely move by the rotating screw 43, the second pull rope 12 can be pulled, and the moving second pull rope 12 can sequentially and slowly pull the spring dynamometer 13 and the weight block 100 to move. By applying tension with the structure, the weight block 100 moves relatively slowly and uniformly, the fluctuation of the tension value is relatively small, and the tension value when the weight block 100 moves can be conveniently read by the spring dynamometer 13.
As a further specific solution, the present embodiment may further include a plurality of insert plates 7 for providing different surface friction forces, and the rotating plate 6 is provided with insert plate grooves 64 for being in insert fit with the insert plates 7. The plugboard 7 is matched with the rotating plate 6 in a plug-in manner, so that the plugboard 7 with different surface friction forces can be replaced conveniently.
During specific application, the workbench 1 is also fixedly provided with a plugboard frame 8 for placing the plugboard 7, the plugboard 7 which is not used can be conveniently stored in the plugboard frame 8, the side wall of the plugboard 7 is fixedly connected with a plugboard handle 71, and the plugboard 7 is convenient to insert and place through the arrangement of the plugboard handle 71.
It is obvious that the insert 7 may be embodied as a smooth glass insert with approximately zero surface friction, but of course, the insert 7 may also be embodied as a wooden insert with a different friction coefficient, a metal insert and/or a cotton insert with a cotton layer covered on the surface, etc. The magnitude of friction force generated when the weight blocks 100 on different plugboards 7 move is measured through experiments, so that students can understand the knowledge points of the forces such as operation friction force and the like.
In the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. refer to an orientation or a positional relationship based on that shown in the drawings, and are merely relational terms, which are used for convenience in describing structural relationships of various components or elements of the present utility model, and do not denote any one of the components or elements of the present utility model, and are not to be construed as limiting the present utility model.
Claims (7)
1. The utility model provides a simple and easy model for mechanical experiments, includes workstation (1), commentaries on classics board (6) and is used for placing weight piece (100) on commentaries on classics board (6), its characterized in that: a pair of support rods (5) are fixedly arranged on the workbench (1), and a central rotating shaft (52) is rotatably arranged on the support rods (5);
one end of the rotating plate (6) is integrally connected with a rotating plate sleeve (61) which is sleeved and fixed on the central rotating shaft (52), a notch groove (63) is formed in the middle of the rotating plate sleeve (61), a fixed pulley I (3) is arranged in the notch groove (63), and the fixed pulley I (3) is rotatably sleeved on the central rotating shaft (52);
the block hanging ring (101) of the weight block (100) is connected with a first stay rope (31) in a binding mode, and the other end of the first stay rope (31) bypasses the first fixed pulley (3) and is connected with the hook end of the upper end of the spring dynamometer (13) in a binding mode.
2. The simplified model for mechanical experiments according to claim 1, wherein: the automatic rotating device is characterized by further comprising a rotating plate angle adjusting mechanism (2), wherein the rotating plate angle adjusting mechanism (2) comprises a worm support (21), a worm wheel (24), a worm (22) and an angle adjusting crank (23), the worm support (21) is fixedly arranged on the side wall of the supporting rod (5), the worm (22) is rotatably arranged on the worm support (21), and the end part of the worm (22) is fixedly connected with the angle adjusting crank (23);
the worm wheel (24) is fixedly sleeved at the end part of the central rotating shaft (52), and the worm wheel (24) is meshed with the worm (22).
3. A simplified model for mechanical experiments according to claim 2, characterized in that: the side wall of the supporting rod (5) is fixedly provided with a protractor scale plate (51), and the side edge of the rotating plate (6) is also provided with a side edge angle indication line (62).
4. The simplified model for mechanical experiments according to claim 1, wherein: the weight pulling mechanism (4) comprises a fixed pulley II (11), a guide rail frame (41), a screw rod (43), a nut block (42) and a tension applying crank (44), wherein the fixed pulley II (11) is rotatably arranged on the workbench (1), the guide rail frame (41) is fixedly arranged on the workbench (1), the screw rod (43) is rotatably arranged on the guide rail frame (41), the tension applying crank (44) is fixedly connected with the end part of the screw rod (43), the nut block (42) is further arranged in the guide rail frame (41) in a sliding fit manner, and the nut block (42) is sleeved on the screw rod (43) through a threaded fit manner;
the pull ring of the nut block (42) is connected with a second pull rope (12) in a binding way, and the other end of the second pull rope (12) bypasses the second fixed pulley (11) and is connected with the hanging ring end of the lower end of the spring dynamometer (13) in a binding way.
5. The simplified model for mechanical experiments according to claim 4, wherein: the rotary plate (6) is provided with a plurality of plugboard grooves (64) for being in plug-in fit with the plugboards (7).
6. The simplified model for mechanical experiments according to claim 5, wherein: the workbench (1) is fixedly provided with a plugboard frame (8) for placing plugboards (7), and the side wall of the plugboard (7) is fixedly connected with plugboard handles (71).
7. The simplified model for mechanical experiments according to claim 5, wherein: the inserting plate (7) comprises a smooth glass inserting plate, a wooden inserting plate, a metal inserting plate and/or a cotton cloth inserting plate with a cotton cloth layer covered on the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222676795.0U CN220041250U (en) | 2022-10-11 | 2022-10-11 | Simple model for mechanical experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222676795.0U CN220041250U (en) | 2022-10-11 | 2022-10-11 | Simple model for mechanical experiment |
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| Publication Number | Publication Date |
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| CN220041250U true CN220041250U (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222676795.0U Active CN220041250U (en) | 2022-10-11 | 2022-10-11 | Simple model for mechanical experiment |
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| CN (1) | CN220041250U (en) |
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- 2022-10-11 CN CN202222676795.0U patent/CN220041250U/en active Active
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