CN209912283U - Shaking-proof rigid body rotational inertia experimental device - Google Patents
Shaking-proof rigid body rotational inertia experimental device Download PDFInfo
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- CN209912283U CN209912283U CN201920417822.8U CN201920417822U CN209912283U CN 209912283 U CN209912283 U CN 209912283U CN 201920417822 U CN201920417822 U CN 201920417822U CN 209912283 U CN209912283 U CN 209912283U
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Abstract
The utility model discloses an anti-shaking rigid body rotational inertia experimental device, which comprises a base, a gantry frame, a frame-shaped object carrier, a cantilever assembly and a tensioner; the gantry frame consists of two vertical rods and a cross beam fixed at the top ends of the two vertical rods, is vertically fixed on the base through the two vertical rods, is positioned in the same vertical plane with the tensioner fixedly installed at the center of the base, and is symmetrically distributed on two sides of the tensioner; the center of the upper frame of the frame-shaped object carrier is connected with the cross beam through an upper steel wire, and the center of the lower frame is connected with the tensioner through a lower steel wire; the frame-shaped object carrier and the gantry frame are also positioned in the same vertical plane; a polish stop rod is vertically fixed at the lower end of the left side of the frame-shaped object carrier; the cantilever assembly comprises a substrate, a ferrule, a photoelectric door, an amplitude limiting fork and an anti-shaking plate; the ferrule, the photoelectric door, the amplitude limiting fork and the anti-shaking plate are fixed on the substrate from left to right in sequence, and the photoelectric door faces upwards and is parallel to the substrate; the anti-shaking plate part extends to the outer side of the substrate, and a small hole is formed at the right end of the anti-shaking plate; the cantilever assembly is sleeved on the left upright rod through a ferrule; the lower steel wire penetrates through the small hole in the anti-shaking plate, the lower frame of the frame-shaped object carrier is arranged in the limiting fork, and the light blocking rod is arranged in the photoelectric door.
Description
Technical Field
The utility model belongs to physical teaching experimental apparatus, more specifically say, it belongs to the teaching experimental apparatus about studying rigid body inertia in internal colleges and universities.
Background
The moment of inertia is an important physical quantity for describing the moment of inertia of a rigid body, and for a uniform rigid body with a simple shape, the size and the mass of the shape of the uniform rigid body are measured, so that the moment of inertia can be calculated. For a rigid body with a complex shape and uneven mass distribution, a rotational inertia is generally measured by using a rotational experiment, and different rotational inertias can be measured by using different mass distributions, geometrical shapes and positions of a rotating shaft of the rigid body. When measuring, the rigid body rotates along with shaking (swinging), so that the position of the rotating shaft can shake, the measured rotational inertia data can change along with the shaking, and a large error is generated. Most of the prior teaching experimental devices for the moment of inertia of a rigid body cannot effectively prevent the rigid body from shaking along with the rotation.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides an anti-shaking rigid body moment of inertia experimental device.
The utility model discloses a following technical scheme realizes:
an anti-shaking rigid body rotational inertia experimental device comprises a base, a gantry frame, a frame-shaped object carrier, a cantilever assembly and a tensioner;
the gantry frame consists of two vertical rods and a cross beam fixed at the top ends of the two vertical rods, is vertically fixed on the base through the two vertical rods, is positioned in the same vertical plane with the tensioner fixedly installed at the center of the base, and is symmetrically distributed on two sides of the tensioner; the center of the upper frame of the frame-shaped object carrier is connected with the cross beam through an upper steel wire, and the center of the lower frame is connected with the tensioner through a lower steel wire; the frame-shaped object carrier and the gantry frame are also positioned in the same vertical plane; a polish stop rod is vertically fixed at the lower end of the left side of the frame-shaped object carrier; the cantilever assembly comprises a substrate, a ferrule, a photoelectric door, an amplitude limiting fork and an anti-shaking plate; the ferrule, the photoelectric door, the amplitude limiting fork and the anti-shaking plate are fixed on the substrate from left to right in sequence, and the photoelectric door faces upwards and is parallel to the substrate; the anti-shaking plate part extends to the outer side of the substrate, and a small hole is formed at the right end of the anti-shaking plate; the cantilever assembly is sleeved on the left upright rod through a ferrule; the lower steel wire penetrates through the small hole in the anti-shaking plate, the lower frame of the frame-shaped object carrier is arranged in the limiting fork, and the light blocking rod is arranged in the photoelectric door.
Furthermore, the device is also provided with a horizontal adjusting device which comprises height-adjustable feet arranged at the bottom of the base and a horizontal bulb fixed on the base.
Further, the upper steel wire and the lower steel wire are equal in length.
Furthermore, the upper end of the upper steel wire is connected to the center of the cross beam through an upper steel wire chuck, and the upper steel wire is firmly clamped by the upper steel wire chuck; the steel wire upper clamping head is arranged on the cross beam, and a shifting lever used for rotating the steel wire upper clamping head is further arranged on the side face of the steel wire upper clamping head.
Further, the lower end of the lower steel wire is connected with the tensioner through a lower steel wire chuck, and the lower steel wire chuck firmly clamps the lower steel wire; the steel wire lower chuck is arranged in the tensioner, and a pin for limiting the rotation of the steel wire lower chuck is arranged on the side surface of the tensioner.
Furthermore, a strip-shaped hole is formed in the substrate, and the amplitude limiting fork is fixed to the substrate through a screw and the strip-shaped hole.
Furthermore, the left side of the anti-shaking plate is provided with a strip-shaped opening, and the anti-shaking plate is fixed on the substrate through the bolt and the strip-shaped opening.
The utility model discloses following beneficial effect has:
1. the experimental device for the rotational inertia of the rigid body is perfected, the rotation of the frame-shaped object carrier is effectively prevented from shaking along with the rotation, and the rotational inertia of the rigid body can be accurately measured;
2. the rotation amplitude of the frame-shaped carrier can be controlled by using the amplitude limiting fork, so that experimental errors and steel wires are reduced;
3. the experimental principle is clear, the experimental thought is direct, the operation is convenient, and the perceptual knowledge of students is enriched.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a view of the cantilever assembly;
fig. 3 is a tensioner structural view.
In the figure: 1. a base; 2. a gantry frame; 3. a cross beam; 4. a frame-shaped article carrier; 5. a steel wire middle clamping head; 6. steel wires are arranged; 7. steel wire feeding; 8. a steel wire upper clamping head; 9. a deflector rod; 10. footing; 11. horizontal bubble; 12. a cantilever assembly; 13. a ferrule; 14. a photogate; 15. an amplitude limiting fork; 16. an anti-sloshing plate; 17. a strip-shaped hole; 18. a polish rod is blocked; 19. a tensioner; 20. adjusting a knob; 21 a spring; 22. an outer cylinder; 23. a pin; 24. a long groove; 25. a steel wire lower clamping head; 26. a substrate;
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1, 2 and 3:
as shown in fig. 1, an anti-shaking rigid body moment of inertia experimental apparatus comprises a base 1, a gantry frame 2, a frame-shaped object carrier 4, a cantilever assembly 12 and a tensioner 19;
the gantry frame 2 consists of two vertical rods and a cross beam 3 fixed at the top ends of the two vertical rods, the two vertical rods are vertically fixed on the base 1, are positioned in the same vertical plane with a tensioner 19 fixedly installed at the center of the base 1, and are symmetrically distributed on two sides of the tensioner 19; the center of the upper frame of the frame-shaped object carrier 4 is connected with the cross beam 3 through an upper steel wire 6, the center of the lower frame is connected with the tensioner 19 through a lower steel wire 7, and the tensioning degree of the upper and lower steel wires 6 and 7 can be adjusted by rotating the adjusting knob 20 of the tensioner. The frame-shaped object carrier 4 and the gantry frame 2 are positioned in the same vertical plane; a polish stop rod 18 is vertically fixed at the lower end of the left side of the frame-shaped object carrier 4; as shown in fig. 2, the cantilever assembly 12 includes a base plate 26, a ferrule 13, a photogate 14, a limiter fork 15, and an anti-sloshing plate 16; the ferrule 13, the photoelectric door 14, the limiting fork 15 and the anti-shaking plate 16 are fixed on the base plate 26 from left to right in sequence, and the opening of the photoelectric door 14 faces upwards and is parallel to the base plate 26; the anti-shaking plate 16 partially extends to the outer side of the base plate 26, and a small hole is formed at the right end of the anti-shaking plate 16; the cantilever assembly 12 is sleeved on the left vertical rod through a ferrule 13 and can move up and down to a proper position and then be fixed by screws. The lower steel wire 7 penetrates through the small hole in the anti-shaking plate 16, and because the small hole is slightly larger than the diameter of the steel wire, if the steel wire swings, the steel wire can collide with the edge of the small hole, and the steel wire cannot swing, so that the shaking of the rigid body caused by improper actions of an experimenter during rotation is effectively prevented, the rigid body does not contact with the steel wire during normal rotation, and no friction is generated. The lower frame of the frame-shaped object carrier 4 is arranged in the opening of the amplitude limiting fork 15, and the light blocking rod 18 is arranged in the opening of the photoelectric door 14. The photoelectric door 14 is used for measuring the time when the light blocking rod 18 at the lower part of the frame-shaped object carrier 4 is used for blocking the photoelectric door 14 when swinging; the amplitude limiting fork 15 is used for limiting the twisting amplitude of the frame-shaped object carrier 4, and preventing the excessive twisting amplitude from damaging the steel wire and increasing errors.
Before the experiment, the deflector rod 9 is firstly pulled to ensure that the light blocking rod 18 is arranged in the opening of the photoelectric door 14, then the tensioner 19 is adjusted to ensure that the steel wires 6 and 7 are kept in a proper tensioning state, then the position of the ferrule on the cantilever assembly 12 is adjusted to ensure that the cantilever assembly 12 is parallel to the gantry frame 2 and the lower frame of the frame-shaped carrier 4 is arranged in the middle of the limiting fork 15, and the position of the anti-shaking plate 16 is adjusted to ensure that the small hole wall at the front end of the anti-shaking plate is not contacted with the lower steel.
During the experiment, the test heavy block is placed on the lower frame of the frame-shaped object carrier 4, after the test heavy block is static, the frame of the frame-shaped object carrier 4 is slightly pushed, hands are put on the frame, the frame-shaped object carrier 4 rotates back and forth due to the twisting of the steel wires 6 and 7, the photoelectric door 14 measures the light blocking signal of the light blocking rod 18 at the lower part of the frame-shaped object carrier 4, the rotation period is measured by a timer, and therefore the rigid body moment of inertia can be calculated. When the rotation amplitude of the frame-shaped object carrier 4 is too large, the lower frame of the frame-shaped object carrier collides with the fork edge of the amplitude limiting fork 15 to limit the rotation amplitude of the frame-shaped object carrier 4, and effectively prevent the steel wire from being damaged and the error from being increased due to the too large twisting amplitude. The small hole at the front end of the anti-shaking plate 16 can limit the shaking of the steel wire in the small hole, so that the influence of the shaking on the test is avoided, and the measuring precision is ensured.
When different weights are placed on the frame-shaped object carrier 4, the rotational inertia of the rigid body and the mass size, the mass distribution and the change rule of the position of the rotating shaft can be researched, and the theorem of the parallel shaft can be verified.
Preferably, the device is further provided with a horizontal adjusting device which comprises a height-adjustable foot 10 arranged at the bottom of the base 1 and a horizontal bubble 11 fixed on the base 1. The levelness of the base 1 is adjusted, and measuring errors caused by uneven ground are avoided.
The upper steel wire 6 and the lower steel wire 7 are equal in length.
In addition, as shown in fig. 1, the upper end of the upper steel wire 6 is connected to the center of the cross beam 3 through an upper steel wire chuck 8, and the lower end is connected to the frame-shaped article carrier 4 through a middle steel wire chuck 5; the upper steel wire clamping head 8 clamps the upper steel wire 6, and the upper steel wire are relatively static; the steel wire upper clamping head 8 is arranged on the cross beam 3, a deflector rod 9 for rotating the steel wire upper clamping head is also arranged on the side surface of the steel wire upper clamping head 8, and the static initial position of the frame-shaped object carrier 4 can be adjusted. The lower end of the lower steel wire 7 is connected with the tensioner 19 through a lower steel wire chuck 25, and the upper end of the lower steel wire is connected with the frame-shaped object carrier 4 through a middle steel wire chuck 5; the lower steel wire clamping head 25 is arranged in the tensioner 19, the lower steel wire clamping head 25 clamps the lower steel wire 7, and the lower steel wire clamping head and the lower steel wire are relatively static; the lower wire clamp 25 is laterally fitted with a pin 23 and is engaged in a long groove 24 formed in the inner wall of the outer cylinder 22 to restrict the rotation of the lower wire clamp 25.
As shown in fig. 3, the tensioner 19 includes an adjustment knob 20, a spring 21, and an outer cylinder 22. Adjustment knob 20 may vary the force with which spring 21 pushes lower wire clamp 25, thereby varying the upper and lower wire tension.
The base plate 26 is provided with a strip-shaped hole 17, and the amplitude limiting fork 15 is fixed on the base plate 26 through the bolt and the strip-shaped hole 17. The position of the amplitude limiting fork 15 can be adjusted, and the rotation amplitude of the frame-shaped object carrier 4 can be larger when the lower steel wire 7 is moved; on the contrary, the rotation range of the frame-shaped object carrier 4 becomes smaller. Similarly, the left side of the anti-sloshing plate 16 is provided with a strip-shaped opening, and the anti-sloshing plate 16 is fixed on the base plate 26 through the strip-shaped opening and a screw. The position relation between the small hole at the right end of the anti-shaking plate 16 and the lower steel wire is convenient to adjust.
Finally, it is also noted that the above list is only one specific embodiment of the invention. Obviously, the present invention can be implemented in many variations, and all variations that can be derived or suggested directly from the disclosure of the present invention by those skilled in the art should be considered as the protection scope of the present invention.
Claims (7)
1. An anti-shaking rigid body rotational inertia experimental device is characterized by comprising a base (1), a gantry frame (2), a frame-shaped object carrier (4), a cantilever assembly (12) and a tensioner (19);
the gantry frame (2) consists of two vertical rods and a cross beam (3) fixed at the top ends of the two vertical rods, the gantry frame (2) is vertically fixed on the base (1) through the two vertical rods, and the tensioners (19) are positioned in the same vertical plane and symmetrically distributed on two sides of the tensioners (19); the center of the upper frame of the frame-shaped object carrier (4) is connected with the cross beam (3) through an upper steel wire (6), and the center of the lower frame is connected with the tensioner (19) through a lower steel wire (7); the frame-shaped object carrier (4) and the gantry frame (2) are positioned in the same vertical plane; a polish stop rod (18) is vertically fixed at the lower end of the left side of the frame-shaped object carrier (4); the cantilever assembly (12) comprises a base plate (26), a ferrule (13), a photoelectric door (14), a limiting fork (15) and an anti-sloshing plate (16); the ferrule (13), the photoelectric door (14), the limiting fork (15) and the anti-shaking plate (16) are fixed on the substrate (26) from left to right in sequence, and the opening of the photoelectric door (14) faces upwards and is parallel to the substrate (26); the anti-shaking plate (16) partially extends to the outer side of the base plate (26), and a small hole is formed at the right end of the anti-shaking plate (16); the cantilever assembly (12) is sleeved on the left vertical rod through a ferrule (13); the lower steel wire (7) passes through a small hole on the anti-shaking plate (16), the lower frame of the frame-shaped object carrier (4) is arranged in the middle of the limiting fork (15), and the light blocking rod (18) is arranged in the middle of the opening of the photoelectric door (14).
2. An anti-shaking rigid body moment of inertia experimental apparatus as claimed in claim 1, wherein the apparatus is further provided with a level adjustment device comprising height adjustable feet (10) installed at the bottom of the base (1) and a level bulb (11) fixed on the base (1).
3. The experimental device for preventing shaking rigid body moment of inertia is characterized in that the lengths of the upper steel wire (6) and the lower steel wire (7) are equal.
4. The experimental device for anti-shaking rigid body moment of inertia according to claim 1, wherein the upper end of the upper steel wire (6) is connected to the center of the cross beam (3) through an upper steel wire clamping head (8), and the lower end is connected to the frame-shaped object carrier (4) through a middle steel wire clamping head (5); the steel wire upper clamping head (8) clamps the upper steel wire (6) firmly, and the upper steel wire and the lower steel wire are relatively static; a deflector rod (9) for rotating the steel wire upper clamping head is also arranged on the side surface of the steel wire upper clamping head (8).
5. The experimental device for anti-shaking rigid body moment of inertia according to claim 1, wherein the lower end of the lower steel wire (7) is connected with the tensioner (19) through a lower steel wire chuck (25), and the upper end is connected with the frame-shaped carrier (4) through a middle steel wire chuck (5); the steel wire lower clamping head (25) is arranged in the tensioner (19) and clamps the lower steel wire (7) firmly, and the steel wire lower clamping head and the lower steel wire are relatively static; a pin (23) used for limiting the rotation of the steel wire lower clamping head (25) is arranged on the side surface of the steel wire lower clamping head (25).
6. The shaking prevention rigid body moment of inertia experimental apparatus according to claim 1, wherein the base plate (26) is opened with a strip-shaped hole (17), and the amplitude limiting fork (15) is fixed on the base plate (26) through a screw and the strip-shaped hole (17).
7. The experimental device for anti-shaking rigid body moment of inertia as claimed in claim 1, wherein the left side of the anti-shaking plate (16) is provided with a strip-shaped opening, and the anti-shaking plate (16) is fixed on the base plate (26) through the bolt and the strip-shaped opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920417822.8U CN209912283U (en) | 2019-03-29 | 2019-03-29 | Shaking-proof rigid body rotational inertia experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920417822.8U CN209912283U (en) | 2019-03-29 | 2019-03-29 | Shaking-proof rigid body rotational inertia experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209912283U true CN209912283U (en) | 2020-01-07 |
Family
ID=69033528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920417822.8U Expired - Fee Related CN209912283U (en) | 2019-03-29 | 2019-03-29 | Shaking-proof rigid body rotational inertia experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209912283U (en) |
-
2019
- 2019-03-29 CN CN201920417822.8U patent/CN209912283U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |