Rigid body rotational inertia experimental instrument convenient for increasing and decreasing fixed pulley blocks

Abstract

The utility model relates to the technical field of inertia instruments, and discloses a rigid body rotational inertia experimental instrument convenient for increasing and decreasing fixed pulley blocks, which comprises a base, a fixed shaft fixedly mounted in the middle of the base, a bottom plate fixedly mounted on the base positioned on the outer side of the fixed shaft, C-shaped plates fixedly mounted on two sides of the bottom plate, and photoelectric doors fixedly mounted on the C-shaped plates. The photoelectric door is electrically connected with an external master controller through a connecting cable, a winding cone pulley is fixedly installed on the fixing shaft, and a cross-shaped fastening frame is fixedly installed on the winding cone pulley. The two sides in the first wheel frame are each fixedly provided with an L-shaped fixing base and provided with an insertion plate in a penetrating mode, a height-adjustable heightening rod can be inserted into a sleeve in the middle of the insertion plate in a penetrating mode, and therefore the falling distance of a heavy object can be increased through a second line wheel in the second wheel frame at one end of the heightening rod, and more data can be collected; in addition, the overall structure can be rapidly increased or decreased for use according to experiment requirements.

Description

Technical Field

[0001] This utility model relates to the field of inertia meter technology, and in particular to a rigid body rotation inertia experimental instrument that facilitates the addition and removal of fixed pulley groups. Background Technology

[0002] In the fields of physics experimental research and engineering applications, the accurate measurement of the moment of inertia of rigid bodies is crucial. It provides fundamental data support for numerous studies involving mechanical motion and dynamic analysis. Currently, most commercially available experimental devices for measuring the moment of inertia of rigid bodies adopt relatively traditional structural designs, with the key auxiliary structure for lifting the weight typically equipped with only one fixed pulley.

[0003] The above design with only one fixed pulley is used in rigid body rotational inertia experiments. The weight is connected to the experimental object via a rope that passes through the fixed pulley. As the weight falls, it causes the fixed pulley to rotate. However, because there is only one fixed pulley, the distance the weight falls is relatively short. When a pulley with a larger inner diameter is selected for the experiment, the pulley with a larger radius will rotate fewer times than the pulley with a smaller radius when the weight falls the same distance. This results in a relatively small amount of data collected during the experiment. Accurate calculation of rigid body rotational inertia requires a large amount of precise data. The limited amount of data significantly reduces the accuracy of the calculation results and cannot meet the requirements for high-precision experimental results. Utility Model Content

[0004] The purpose of this invention is to provide a rigid body moment of inertia experimental instrument that facilitates the addition and subtraction of fixed pulley blocks, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A rigid body moment of inertia experimental instrument for convenient addition and removal of fixed pulley systems includes a base. A fixed shaft is fixedly installed in the middle of the base. A base plate is also fixedly installed on the base outside the fixed shaft. C-shaped plates are fixedly installed on both sides of the base plate. Photogates are fixedly installed on the C-shaped plates and are electrically connected to an external main controller via connecting cables. A winding pulley is fixedly installed on the fixed shaft. A cross-shaped fastening frame is fixedly installed on the winding pulley. A platform is fixedly installed on the cross-shaped fastening frame. A shaft beam is fixedly installed on the base plate near the fixed shaft. A lifting shaft is inserted through the shaft beam. A horizontal shaft is fixedly installed on the lifting shaft. A first wheel frame is fixedly installed at the end of the horizontal shaft away from the lifting shaft. A first thread pulley is movably installed in the first wheel frame. An insert plate is also movably installed in the first wheel frame near the first thread pulley. A sleeve is fixedly installed in the middle of the insert plate. A heightening rod is inserted through the sleeve. A second wheel frame is fixedly installed at one end of the heightening rod. A second thread pulley is movably installed in the second wheel frame.

[0007] As a further preferred embodiment of this utility model, the lifting shaft is provided with multiple pin holes, and the upper end of the lifting shaft is provided with a positioning groove. The transverse cross-section of the positioning groove is polygonal, and the lifting shaft is inserted into the shaft beam and limited by the pin. After the lifting shaft is inserted into the shaft beam, the installation height of the horizontal shaft and the first roller can be quickly adjusted by cooperating with the pin holes and the pin in the shaft beam.

[0008] As a further preferred embodiment of this utility model, the horizontal axis has an L-shaped structure, and a positioning block with the same cross-sectional shape as the positioning groove is fixedly installed at the end of the horizontal axis away from the first wheel frame. The positioning block is inserted into the positioning groove and fixed with screws.

[0009] As a further preferred embodiment of this utility model, a wheel axle is threadedly connected to the middle of both sides of the first wheel frame, and an L-shaped fixing seat is fixedly installed on both sides of the first wheel frame near the wheel axle. The arrangement of the two wheel axles can provide conditions for the assembly of the first thread wheel, while the arrangement of the L-shaped fixing seat can provide conditions for the assembly of the insert plate.

[0010] As a further preferred embodiment of this utility model, a shaft seat is fixedly installed on the middle of both sides of the first spool, and the first spool is rotatably installed between two axles and located in the first wheel frame through the shaft seats on both sides.

[0011] As a further preferred embodiment of this utility model, the insert plate has a C-shaped structure, the outer surface of the insert plate is coated with a rubber layer, and the two sides of the insert plate are respectively inserted into corresponding L-shaped fixing seats. A limiting flat block is fixedly installed on the inner side of the sleeve, and an internal thread seat is fixedly installed on the outer side of the sleeve. The internal thread seat is internally threaded with a limiting screw, and the outer side of the height-increasing rod has a flat groove corresponding to the limiting flat block inside the sleeve. The height-increasing rod is inserted into the sleeve and fixed by the limiting screw in the internal thread seat. With the help of the insert plate and the sleeve, the height-increasing rod can be added or removed according to experimental needs.

[0012] As a further preferred embodiment of this utility model, both sides of the second wheel frame are also threadedly connected with axles, and both sides of the second thread wheel are also fixedly mounted with axle seats, that is, the second thread wheel is rotatably mounted between the two axles and placed in the second wheel frame through the axle seats on both sides.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this invention, an L-shaped fixing seat is fixedly installed on both sides of the first wheel frame, and an insert plate is inserted therethrough. This allows an adjustable height-adjustable lifting rod to be inserted into the sleeve in the middle of the insert plate. This enables the second pulley in the second wheel frame at one end of the lifting rod to increase the falling distance of the weight, thereby collecting more data to meet the experimental measurement needs of large-radius tower wheels. Furthermore, the overall structure can be quickly added or removed according to experimental requirements, making the overall structure convenient to use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the disassembled structure of the lifting shaft and horizontal shaft, the first wheel frame, the insert plate, and the height-increasing rod of this utility model.

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a sectional view of the first wheel frame of this utility model;

[0019] Figure 5 This is a schematic diagram of the disassembled insert plate and sleeve structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the first thread pulley structure of this utility model.

[0021] In the diagram: 1. Base; 2. Fixed shaft; 3. Base plate; 4. C-shaped plate; 5. Photoelectric gate; 6. Winding tower wheel; 7. Cross fastening frame; 8. Storage platform; 9. Shaft beam; 10. Lifting shaft; 11. Horizontal shaft; 12. First wheel frame; 13. First thread wheel; 14. Insert plate; 15. Sleeve; 16. Heightening rod; 17. Second wheel frame; 18. Second thread wheel; 19. Pin hole; 20. Positioning groove; 21. Positioning block; 22. Wheel axle; 23. L-shaped fixed seat; 24. Shaft seat; 25. Internal threaded hole seat. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figures 1-6As shown, this utility model provides a rigid body rotational inertia experimental instrument for convenient addition and removal of fixed pulley blocks, including a base 1, a fixed shaft 2 fixedly installed in the middle of the base 1, a base plate 3 fixedly installed on the base 1 located outside the fixed shaft 2, C-shaped plates 4 fixedly installed on both sides of the base plate 3, photoelectric gates 5 fixedly installed on the C-shaped plates 4, and the photoelectric gates 5 are electrically connected to an external main controller through connecting cables, a winding tower wheel 6 fixedly installed on the fixed shaft 2, a cross fastening frame 7 fixedly installed on the winding tower wheel 6, and a platform 8 fixedly installed on the cross fastening frame 7, and the base plate 3... A shaft beam 9 is fixedly installed near the fixed shaft 2. A lifting shaft 10 is inserted into the shaft beam 9. A horizontal shaft 11 is fixedly installed on the lifting shaft 10. A first wheel frame 12 is fixedly installed at the end of the horizontal shaft 11 away from the lifting shaft 10. A first thread pulley 13 is movably installed inside the first wheel frame 12. A plug plate 14 is also movably installed inside the first wheel frame 12 near the first thread pulley 13. A sleeve 15 is fixedly installed in the middle of the plug plate 14. A heightening rod 16 is inserted into the sleeve 15. A second wheel frame 17 is fixedly installed at one end of the heightening rod 16. A second thread pulley 18 is movably installed inside the second wheel frame 17.

[0024] like Figures 1-4 As shown, the lifting shaft 10 has multiple pin holes 19 inside, and a positioning groove 20 is provided at the upper end of the lifting shaft 10. The transverse cross-section of the positioning groove 20 is polygonal, and the lifting shaft 10 is inserted into the shaft beam 9 and limited by the pin. After the lifting shaft 10 is inserted into the shaft beam 9, the installation height of the horizontal shaft 11 and the first roller 13 can be quickly adjusted by cooperating with the pin holes 19 and the pin in the shaft beam 9. The horizontal shaft 11 has an L-shaped structure, and a positioning block 21 with the same transverse cross-section as the positioning groove 20 is fixedly installed at the end of the horizontal shaft 11 away from the first roller frame 12. The positioning block 21 is inserted into the shaft beam 9. The first wheel frame 12 is installed in the positioning groove 20 and fixed with screws. Both sides of the first wheel frame 12 are threaded with axles 22. Both sides of the first wheel frame 12 are fixedly installed with L-shaped fixing seats 23 near the axles 22. The setting of the two axles 22 can provide conditions for the assembly of the first thread wheel 13, and the setting of the L-shaped fixing seats 23 can provide conditions for the assembly of the insert plate 14. Both sides of the first thread wheel 13 are fixedly installed with axle seats 24. The first thread wheel 13 is rotatably installed between the two axles 22 and located in the first wheel frame 12 through the axle seats 24 on both sides.

[0025] like Figures 1-2 , Figures 4-5As shown, the insert plate 14 has a C-shaped structure. The outer surface of the insert plate 14 is coated with a rubber layer, and the two sides of the insert plate 14 are respectively inserted into the corresponding L-shaped fixing seats 23. The inner side of the sleeve 15 is fixedly installed with a limiting flat block, and the outer side of the sleeve 15 is fixedly installed with an internal thread seat 25. The internal thread seat 25 is connected with a limiting screw. The outer side of the extension rod 16 is provided with a flat groove corresponding to the limiting flat block in the sleeve 15. The extension rod 16 is inserted into the sleeve 15 and fixed by the limiting screw in the internal thread seat 25. With the help of the insert plate 14 and the sleeve 15, the extension rod 16 can be added or removed according to experimental needs. The two sides of the second wheel frame 17 are also threadedly connected with wheel axles 22. The two sides of the second thread wheel 18 are also fixedly installed with axle seats 24. That is, the second thread wheel 18 is rotatably installed between the two wheel axles 22 and placed in the second wheel frame 17 through the axle seats 24 on both sides.

[0026] It should be noted that this utility model is a rigid body rotation inertia experimental instrument that facilitates the addition and subtraction of fixed pulley groups. When conducting the inertia experiment, the connecting wire can be wound around the corresponding groove on the outside of the winding tower wheel 6. Then, the height of the first wheel 13 can be adjusted according to the height of the connecting wire. That is, the lifting shaft 10 is moved up and down in the shaft beam 9 and the pin in the shaft beam 9 passes through the corresponding pin hole 19 in the lifting shaft 10 to complete the height adjustment of the lifting shaft 10. This, in conjunction with the horizontal shaft 11 and the first wheel frame 12, adjusts the height of the first wheel 13. Subsequently, one end of the connecting wire can be wound around the first wheel 13 and a weight can be tied to it to complete the preparation work for the experiment.

[0027] When it is necessary to increase the falling distance of the weight, the two sides of the insert plate 14 can be inserted into the L-shaped fixing seat 23 on one side of the first wheel frame 12 to complete the initial installation of the height-increasing rod 16. Then, the height-increasing rod 16 can be adjusted up and down in the sleeve 15, and the height-increasing rod 16 can be limited and fixed by the fastening screw in the internal thread hole seat 25. Then, one end of the connecting wire is wound around the first wire wheel 13 from below and mounted on the second wire wheel 18 and tied to the flange, thereby increasing the falling distance of the flange. The second wire wheel 18 can be quickly installed and removed from the first wheel frame 12 through the height-increasing rod 16, the insert plate 14, and the sleeve 15.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rigid body moment of inertia experimental apparatus that facilitates the addition and removal of fixed pulley systems, characterized in that: The device includes a base (1), a fixed shaft (2) is fixedly installed on the middle part of the base (1), a base plate (3) is fixedly installed on the base (1) located outside the fixed shaft (2), C-shaped plates (4) are fixedly installed on both sides of the base plate (3), a photoelectric gate (5) is fixedly installed on the C-shaped plate (4), and the photoelectric gate (5) is electrically connected to an external main controller through a connecting cable. A winding tower wheel (6) is fixedly installed on the fixed shaft (2), a cross fastening frame (7) is fixedly installed on the winding tower wheel (6), a shelf (8) is fixedly installed on the cross fastening frame (7), and a shaft beam (9) is fixedly installed on the base plate (3) near the fixed shaft (2). A lifting shaft (10) is inserted inside the shaft beam (9). A horizontal shaft (11) is fixedly installed on the lifting shaft (10). A first wheel frame (12) is fixedly installed at the end of the horizontal shaft (11) away from the lifting shaft (10). A first thread wheel (13) is movably installed inside the first wheel frame (12). An insert plate (14) is also movably installed inside the first wheel frame (12) near the first thread wheel (13). A sleeve (15) is fixedly installed in the middle of the insert plate (14). A heightening rod (16) is inserted inside the sleeve (15). A second wheel frame (17) is fixedly installed at one end of the heightening rod (16). A second thread wheel (18) is movably installed inside the second wheel frame (17).

2. The rigid body moment of inertia experimental apparatus for convenient addition and removal of fixed pulley systems according to claim 1, characterized in that: The lifting shaft (10) has multiple pin holes (19) inside, and the upper end of the lifting shaft (10) has a positioning groove (20). The horizontal cross section of the positioning groove (20) is polygonal, and the lifting shaft (10) is inserted into the shaft beam (9) and limited by the pin.

3. The rigid body moment of inertia experimental apparatus for convenient addition and removal of fixed pulley systems according to claim 2, characterized in that: The horizontal shaft (11) has an L-shaped structure. A positioning block (21) with the same transverse cross section as the positioning groove (20) is fixedly installed at one end of the horizontal shaft (11) away from the first wheel frame (12). The positioning block (21) is inserted into the positioning groove (20) and fixed with screws.

4. The rigid body moment of inertia experimental apparatus for convenient addition and removal of fixed pulley systems according to claim 1, characterized in that: The first wheel frame (12) has a wheel axle (22) threadedly connected to the middle of both sides, and an L-shaped fixing seat (23) is fixedly installed on both sides of the first wheel frame (12) near the wheel axle (22).

5. The rigid body moment of inertia experimental apparatus for convenient addition and removal of fixed pulley systems according to claim 4, characterized in that: The first spool (13) has a bearing seat (24) fixedly installed on the middle of both sides. The first spool (13) is rotatably installed between two axles (22) and located in the first wheel frame (12) through the bearing seats (24) on both sides.

6. The rigid body moment of inertia experimental apparatus for convenient addition and removal of fixed pulley systems according to claim 4, characterized in that: The insert plate (14) has a C-shaped structure. The outer surface of the insert plate (14) is coated with a rubber layer. The two sides of the insert plate (14) are respectively inserted into the corresponding L-shaped fixing seats (23). The inner side of the sleeve (15) is fixedly installed with a limiting flat block. The outer side of the sleeve (15) is fixedly installed with an internal thread seat (25). The internal thread seat (25) is internally threaded with a limiting screw. The outer side of the heightening rod (16) is provided with a flat groove corresponding to the limiting flat block inside the sleeve (15). The heightening rod (16) is inserted into the sleeve (15) and fixed by the limiting screw inside the internal thread seat (25).

7. The rigid body moment of inertia experimental apparatus for convenient addition and removal of fixed pulley systems according to claim 6, characterized in that: The second wheel frame (17) is also threaded with axles (22) on both sides, and the second thread wheel (18) is also fixedly installed with axle seats (24) in the middle of both sides. That is, the second thread wheel (18) is rotatably installed between the two axles (22) through the axle seats (24) on both sides and placed in the second wheel frame (17).

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