CN215341596U

CN215341596U - Physical friction force demonstration device

Info

Publication number: CN215341596U
Application number: CN202121514787.5U
Authority: CN
Inventors: 刘燊
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2021-12-28
Anticipated expiration: 2031-07-06

Abstract

The utility model provides a physical friction force demonstration device. Physical friction force demonstration device, including: a test bed; the supporting plate is fixedly arranged at the top of the test bed; the mounting rack is fixedly mounted on the outer wall of one side of the supporting plate; the sliding plates are slidably mounted on the inner walls of the two sides of the mounting frame; the connecting frame is fixedly arranged on the outer wall of one side of the sliding plate; the adjusting rod is installed on the outer wall of one side of the mounting frame in a threaded mode, and one end of the adjusting rod extends into the mounting frame and is connected with the outer wall of one side of the sliding plate in a rotating mode; the ejector rod is slidably mounted on the outer wall of one side of the supporting plate, and one end of the ejector rod penetrates through the supporting plate. The physical friction force demonstration device provided by the utility model has the advantages of convenience and rapidness in operation, capability of flexibly adjusting some variables in an experiment and improvement of a teaching effect.

Description

Physical friction force demonstration device

Technical Field

The utility model relates to the technical field of friction force experiments, in particular to a physical friction force demonstration device.

Background

Physical learning is one of important subjects in current obligation teaching, and friction is influenced by various factors, so in the process of learning physical friction, in order to better understand the influence of different variables on friction, physical friction is demonstrated in the process of learning.

But at present, in the demonstration process of physical friction force learning, the influence factors of the friction force cannot be rapidly adjusted, so that experimental results cannot be compared, the influence of the change of different factors on the friction force cannot be fully reflected, a plurality of factors cannot be simultaneously demonstrated and adjusted, the flexibility in learning is reduced, and the learning effect is poor.

Therefore, it is necessary to provide a physical friction force demonstration device to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a physical friction force demonstration device which is convenient to operate, can flexibly adjust some variables in an experiment and improves a teaching effect.

In order to solve the above technical problems, the present invention provides a physical friction force demonstration apparatus, comprising: a test bed; the supporting plate is fixedly arranged at the top of the test bed; the mounting rack is fixedly mounted on the outer wall of one side of the supporting plate; the sliding plates are slidably mounted on the inner walls of the two sides of the mounting frame; the connecting frame is fixedly arranged on the outer wall of one side of the sliding plate; the adjusting rod is installed on the outer wall of one side of the mounting frame in a threaded mode, and one end of the adjusting rod extends into the mounting frame and is connected with the outer wall of one side of the sliding plate in a rotating mode; the ejector rod is slidably mounted on the outer wall of one side of the supporting plate, and one end of the ejector rod penetrates through the supporting plate; the placing groove is formed in the top of the test bed, and one side of the placing groove is provided with an opening; the material plate is arranged in the placing groove, the top of the material plate extends to the upper part of the placing groove, and one side of the material plate extends to the outside of the test bed; the side plate is fixedly arranged on the outer wall of one side of the material plate; and the sliding block is arranged above the material plate.

Preferably, the inside groove has been seted up on one side outer wall of sliding plate, one of ejector pin serves fixed mounting has the control block, one side of control block extends to in the inside groove, set up flutedly on one side outer wall of control block, the annular has been seted up on the inner wall of recess, it installs the dwang to rotate on one side inner wall of inside groove, the one end of dwang extends to link up in the frame, the other end of dwang extends to in the recess, fixed mounting has two to touch multitouch, two on the outer wall of dwang touch multitouch all extend to in the annular, set up two on one side inner wall of annular and dodge the groove.

Preferably, the top fixed mounting of test bench has two slide bars, two equal slidable mounting has a slide cartridge, two on the slide bar equal fixed mounting has the connecting rod on the outer wall of slide cartridge, two the one end that the connecting rod is close to each other respectively with the both sides fixed connection of slide block.

Preferably, the ejector rod is sleeved with a test spring, one end of the test spring is fixedly connected with the outer wall of one side of the control block, and the other end of the test spring is fixedly connected with the outer wall of one side of the supporting plate.

Preferably, the test bed is provided with a cavity, the inner wall of one side of the cavity is provided with a through hole, a positioning block is fixedly arranged on the outer wall of one side of the side plate, the outer wall of one side of the positioning block penetrates through the through hole and extends into the cavity, an embedding groove is arranged on the outer wall of one side of the positioning block, the inner walls of the two sides of the cavity are provided with a transverse moving plate in a sliding way, the outer wall of one side of the transverse moving plate is fixedly provided with a top block, the outer wall of one side of the top block extends into the caulking groove, a pull rod is slidably arranged on the outer wall of one side of the test bed, one end of the pull rod extends into the cavity and is fixedly connected with the outer wall of one side of the traverse moving plate, the pull rod is sleeved with an abutting spring, one end of the abutting spring is fixedly connected with the outer wall of one side of the transverse moving plate, and the other end of the abutting spring is fixedly connected with the inner wall of one side of the cavity.

Preferably, the holding tank has been seted up at the top of sliding block, the limit groove has all been seted up on the both sides inner wall of holding tank, two equal fixed mounting has the gag lever post on the top inner wall of limit groove and the bottom inner wall of, two equal slidable mounting has the bullet board on the gag lever post, two one side that the bullet board is close to each other all extends to in the holding tank, two fixed mounting has the U-shaped piece on the one side outer wall that the bullet board is close to each other, the top of U-shaped piece extends to the top of holding tank.

Preferably, two all the cover is equipped with spacing spring on the gag lever post, two spacing spring's top respectively with two the bottom fixed connection of diving board, two spacing spring's bottom respectively with two the bottom inner wall fixed connection of limit groove.

Compared with the related art, the physical friction force demonstration device provided by the utility model has the following beneficial effects:

the utility model provides a physical friction force demonstration device, when a physical friction force test is carried out, a worker can rotate an adjusting rod to pull a control block, so that a test spring can be stretched, the impact force of an ejector rod is driven by the test spring to finally impact the sliding length of a sliding block, the worker can adjust the stretching length of the test spring, the influence of different impact forces on the friction force on the same material plate can be demonstrated, the same impact force can be maintained, different material plates can be replaced, the influence of the material on the friction force can be demonstrated, and therefore various variables in the friction force test can be replaced, and students can better know the change of the friction force.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of a physical friction force demonstration apparatus according to the present invention;

FIG. 2 is an enlarged schematic view of portion A shown in FIG. 1;

FIG. 3 is an enlarged schematic view of portion B shown in FIG. 1;

FIG. 4 is a top cross-sectional structural view of the ring groove shown in FIG. 1;

FIG. 5 is a schematic perspective view of the test stand shown in FIG. 1;

FIG. 6 is a schematic view of a second embodiment of a physical friction force demonstrating device provided by the present invention;

FIG. 7 is a side cross-sectional structural view of the slider shown in FIG. 3.

Reference numbers in the figures: 1. a test bed; 2. a support plate; 3. a mounting frame; 4. a sliding plate; 5. a linking frame; 6. adjusting a rod; 7. a top rod; 8. a control block; 28. a groove; 9. a ring groove; 10. rotating the rod; 11. a contact block; 12. an avoidance groove; 13. a slider; 14. a placement groove; 15. a material plate; 16. a side plate; 17. a chamber; 18. positioning blocks; 19. caulking grooves; 20. a pull rod; 21. a top block; 22. accommodating grooves; 23. a side groove; 24. a limiting rod; 25. a spring plate; 26. a U-shaped block; 27. and a limiting spring.

Detailed Description

The utility model is further described with reference to the following figures and embodiments.

First embodiment

Referring to fig. 1 to 5, in a first embodiment of the present invention, a physical friction force demonstration apparatus includes: a test stand 1; the supporting plate 2 is fixedly arranged at the top of the test bed 1, and the supporting plate 2 plays a main supporting effect; the mounting rack 3 is fixedly arranged on the outer wall of one side of the supporting plate 2; the sliding plates 4 are slidably mounted on the inner walls of the two sides of the mounting frame 3, the inner walls of the two sides of the mounting frame 3 are respectively provided with a slide way, the outer walls of the two sides of the sliding plates 4 are respectively fixedly provided with a slide block, and the sliding connection between the two slide ways and the two slide blocks can not only enable the sliding plates 4 to slide but also limit the sliding plates 4; the connecting frame 5 is fixedly arranged on the outer wall of one side of the sliding plate 4; the adjusting rod 6 is installed on the outer wall of one side of the mounting frame 3 in a threaded manner, one end of the adjusting rod 6 extends into the mounting frame 3 and is rotatably connected with the outer wall of one side of the sliding plate 4, and the connecting frame 5 and the sliding plate 4 can be transversely pulled during rotation through the threaded connection of the adjusting rod 6; the ejector rod 7 is slidably mounted on the outer wall of one side of the support plate 2, one end of the ejector rod 7 penetrates through the support plate 2, and the ejector rod 7 is directly contacted with the sliding block 13 when being reset by the test spring so as to drive the sliding block 13 to slide; a placing groove 14, wherein the placing groove 14 is arranged on the top of the test bed 1, and one side of the placing groove 14 is provided with an opening; the material plate 15 is arranged in the placing groove 14, the top of the material plate 15 extends to the upper side of the placing groove 14, one side of the material plate 15 extends to the outside of the test bed 1, and different frosting layers are arranged on the surface of the material plate 15, so that the influence of different materials on friction force can be reflected, and in actual production, the material plates 15 made of various different materials can be produced in a matched manner, so that the replacement is convenient; the side plate 16 is fixedly arranged on the outer wall of one side of the material plate 15; the sliding block 13 is arranged above the material plate 15, and four rollers are arranged at the bottom of the sliding block 13, so that the sliding block 13 can slide conveniently.

In order to effectively allocate the ejector rod 7 and enable the ejector rod 7 to lose the limit in a moment, so as to achieve the real impact effect, in the embodiment, preferably, an inner groove is formed on the outer wall of one side of the sliding plate 4, one end of the top rod 7 is fixedly provided with a control block 8, one side of the control block 8 extends into the inner groove, a groove 28 is arranged on the outer wall of one side of the control block 8, a ring groove 9 is arranged on the inner wall of the groove 28, a rotating rod 10 is rotatably arranged on the inner wall of one side of the inner groove, one end of the rotating rod 10 extends into the connecting frame 5, the other end of dwang 10 extends to in the recess 28, fixed mounting has two conflict pieces 11, two on the outer wall of dwang 10 conflict piece 11 all extends to in the annular 9, seted up two on one side inner wall of annular 9 and kept away groove 12.

In order to carry out effectual spacing to sliding block 13, make sliding block 13 can only keep horizontal lateral shifting, in this embodiment, it is preferred, test bench 1's top fixed mounting has two slide bars, two equal slidable mounting has a slide cartridge, two on the slide bar equal fixed mounting has a connecting rod, two on the outer wall of slide cartridge the connecting rod each other be close to one end respectively with slide block 13's both sides are fixed, connect the staff and can set up the scale mark on two slide bars to can be through the distance of sliding of two slide cartridges on the scale mark, accurate understanding experiment data.

In order to accurately control the impact force of the ejector rod 7 and the force applied to the sliding block 13, in this embodiment, preferably, a test spring is sleeved on the ejector rod 7, one end of the test spring is fixedly connected with the outer wall of one side of the control block 8, the other end of the test spring is fixedly connected with the outer wall of one side of the supporting plate 2, and the elastic potential energy of the test spring is changed by changing the tensile length of the test spring.

In order to facilitate quick replacement of the material plate 15, in this embodiment, it is preferable that the test bed 1 is provided with a cavity 17, an inner wall of one side of the cavity 17 is provided with a through hole, an outer wall of one side of the side plate 16 is fixedly provided with a positioning block 18, an outer wall of one side of the positioning block 18 penetrates through the through hole and extends into the cavity 17, an outer wall of one side of the positioning block 18 is provided with a caulking groove 19, inner walls of two sides of the cavity 17 are slidably provided with a traverse plate, an outer wall of one side of the traverse plate is fixedly provided with a top block 21, an outer wall of one side of the top block 21 extends into the caulking groove 19, one side of the top block 21 is provided with an inclined surface so as to increase a contact force of the positioning block 18 against the top block 21 during installation, an outer wall of one side of the test bed 1 is slidably provided with a pull rod 20, one end of the pull rod 20 extends into the cavity 17 and is fixedly connected with an outer wall of one side of the traverse plate, the pull rod 20 is sleeved with an abutting spring, one end of the abutting spring is fixedly connected with the outer wall of one side of the transverse moving plate, the other end of the abutting spring is fixedly connected with the inner wall of one side of the cavity 17, the abutting spring can be always located in the embedded groove 19 under the condition that the ejecting block 21 is not subjected to external force, and the stability of the material plate 15 is guaranteed.

In this embodiment:

in the process of carrying out the test of physical friction, at first the staff can rotate the regulation pole 6, adjust the pivoted in-process of pole 6, because it receives gliding spacing to link up frame 5 and sliding plate 4, so when adjusting pole 6 and rotate, can draw linking up frame 5 and sliding plate 4 lateral shifting under the transmission of screw thread, thereby drive control block 8 and ejector pin 7 lateral shifting, ejector pin 7 lateral shifting can tensile test spring, thereby make the test spring be in the condition of tensile power of holding gradually, after ejector pin 7 is tensile to a certain extent, the staff can the stall regulation pole 6, afterwards the staff can pass sliding block 13 to the suitable position on the material board 15.

After preparing work and accomplishing, the staff can rotate dwang 10, dwang 10 rotates and can drive two and support touch multitouch 11 at the 9 internal rotations of annular, when two support touch multitouch 11 rotate respectively to dodge groove 12 with two and match when, two support touch multitouch 11 lose the spacing effect to control block 8 this moment, and control block 8 is after losing spacing effect, can be under the effect that resets of experimental spring, the rapid reverse movement of ejector pin 7 can, the striking that the one end of final ejector pin 7 can be quick is on one side outer wall of sliding block 13, thereby exert a horizontal impact force to sliding block 13, make sliding block 13 quick the sliding on material board 15, and can be under the effect of frictional force gradual speed reduction final stop.

When a friction experiment needs to be carried out again, the ejector rod 7 only needs to be transversely pushed again to enable the ejector rod 7 to transversely move, the two abutting blocks 11 respectively enter the two avoidance grooves 12, after the two abutting blocks 11 enter the annular groove 9, a worker can rotate the rotating rod 10 to enable the two abutting blocks 11 to enter the annular groove 9, so that the limiting effect on the control block 8 is carried out again, at the moment, the adjusting rod 6 can be rotated again, the test spring is continuously stretched or relatively contracted through the pulling of the adjusting rod 6, so that the impact force on the sliding block 13 is controlled, the variable of the impact force is changed, meanwhile, the worker can transversely pull the pull rod 20, the pull rod 20 transversely move to drive the ejector block 21 to transversely move, meanwhile, the ejector block 21 can gradually compress the abutting spring, and after the ejector block 21 is moved out from the embedded groove 19, the ejector block 21 can lose the limiting effect on the positioning block 18, at this time, the worker can pull the side plate 16 laterally to pull out the material plate 15 from the placing groove 14, and at this time, the material plate 15 made of another material can be replaced, so that the influence of the material on the friction force can be changed.

when carrying out the physics frictional force experiment, the staff can adjust pole 6 through rotating, thereby can stimulate control block 8, with this can stretch the test spring, drive the impact of ejector pin 7 through the test spring, finally strike sliding block 13's sliding length, the staff can adjust the tensile length of test spring, demonstrate the same material board 15 with this on, different impact force is to the influence of frictional force, can keep the same impact equally, change different material board 15, demonstrate the influence of material to frictional force, thereby can change various variables in the frictional force experiment, make the change of better understanding frictional force of student.

Second embodiment:

based on the physical friction force demonstration device provided by the first embodiment of the application, the second embodiment of the application provides another physical friction force demonstration device. The second embodiment is merely a preferred way of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.

The second embodiment of the present invention will be further described with reference to the drawings and the following description.

Referring to fig. 6-7, the physical friction force demonstration apparatus further includes a holding groove 22, the holding groove 22 is disposed at the top of the sliding block 13, the inner walls of two sides of the holding groove 22 are both provided with a side groove 23, the inner walls of the top and the bottom of the side grooves 23 are both fixedly provided with a limiting rod 24, the two limiting rods 24 can enable the U-shaped block 26 to keep moving in the vertical direction, the two limiting rods 24 are both slidably provided with an elastic plate 25, one side of the two elastic plates 25 close to each other extends into the holding groove 22, the outer wall of one side of the two elastic plates 25 close to each other is fixedly provided with the U-shaped block 26, and the top of the U-shaped block 26 extends to the top of the holding groove 22.

In order to prevent the placed weight from shaking when the sliding block 13 slides, in this embodiment, preferably, two limiting springs 27 are sleeved on the limiting rods 24, the top ends of the limiting springs 27 are respectively and fixedly connected with the bottom of the elastic plate 25, and the bottom ends of the limiting springs 27 are respectively and fixedly connected with the inner wall of the bottom of the side groove 23.

In this embodiment:

in the process of the test, the staff can upwards pull U-shaped block 26, make U-shaped block 26 upwards move, U-shaped block 26 upwards moves and can drive two springboards 25 upwards to move, thereby stretch two spacing springs 27 gradually, after U-shaped block 26 upwards moves to suitable distance, the staff can place the weight in holding tank 22, finally loosen U-shaped block 26, under two spacing springs 27's the effect that resets, fix the weight in holding tank 22 through U-shaped block 26, can change the weight of sliding block 13 with this, demonstrate the influence of sliding block 13 of different weight to frictional force with this.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A physical friction demonstration apparatus comprising:

a test bed;

the supporting plate is fixedly arranged at the top of the test bed;

the mounting rack is fixedly mounted on the outer wall of one side of the supporting plate;

the sliding plates are slidably mounted on the inner walls of the two sides of the mounting frame;

the connecting frame is fixedly arranged on the outer wall of one side of the sliding plate;

the adjusting rod is installed on the outer wall of one side of the mounting frame in a threaded mode, and one end of the adjusting rod extends into the mounting frame and is connected with the outer wall of one side of the sliding plate in a rotating mode;

the ejector rod is slidably mounted on the outer wall of one side of the supporting plate, and one end of the ejector rod penetrates through the supporting plate;

the placing groove is formed in the top of the test bed, and one side of the placing groove is provided with an opening;

the material plate is arranged in the placing groove, the top of the material plate extends to the upper part of the placing groove, and one side of the material plate extends to the outside of the test bed;

the side plate is fixedly arranged on the outer wall of one side of the material plate;

and the sliding block is arranged above the material plate.

2. The physical friction force demonstration device according to claim 1, wherein an inner groove is formed in an outer wall of one side of the sliding plate, a control block is fixedly mounted on one end of the ejector rod, one side of the control block extends into the inner groove, a groove is formed in an outer wall of one side of the control block, an annular groove is formed in an inner wall of the groove, a rotating rod is rotatably mounted on an inner wall of one side of the inner groove, one end of the rotating rod extends into the engagement frame, the other end of the rotating rod extends into the groove, two contact blocks are fixedly mounted on an outer wall of the rotating rod, the two contact blocks extend into the annular groove, and two avoidance grooves are formed in an inner wall of one side of the annular groove.

3. The physical friction force demonstration device according to claim 1, wherein two sliding rods are fixedly mounted at the top of the test bed, sliding cylinders are slidably mounted on the two sliding rods, connecting rods are fixedly mounted on the outer walls of the two sliding cylinders, and one ends of the two connecting rods, which are close to each other, are fixedly connected with two sides of the sliding blocks respectively.

4. The physical friction force demonstration device according to claim 2, wherein a test spring is sleeved on the ejector rod, one end of the test spring is fixedly connected with the outer wall of one side of the control block, and the other end of the test spring is fixedly connected with the outer wall of one side of the support plate.

5. The physical friction force demonstration device according to claim 1, wherein the testing table is provided with a cavity, an opening is formed on one side inner wall of the cavity, a positioning block is fixedly mounted on one side outer wall of the side plate, one side outer wall of the positioning block penetrates through the opening and extends into the cavity, a caulking groove is formed on one side outer wall of the positioning block, a traverse plate is slidably mounted on two side inner walls of the cavity, a top block is fixedly mounted on one side outer wall of the traverse plate, one side outer wall of the top block extends into the caulking groove, a pull rod is slidably mounted on one side outer wall of the testing table, one end of the pull rod extends into the cavity and is fixedly connected with one side outer wall of the traverse plate, an abutting spring is sleeved on the pull rod, and one end of the abutting spring is fixedly connected with one side outer wall of the traverse plate, the other end of the abutting spring is fixedly connected with the inner wall of one side of the cavity.

6. The physical friction force demonstration device according to claim 1, wherein a holding groove is formed in the top of the sliding block, side grooves are formed in inner walls of two sides of the holding groove, limiting rods are fixedly mounted on inner walls of the top and the bottom of the two side grooves, elastic plates are slidably mounted on the two limiting rods, one side, close to each other, of each elastic plate extends into the holding groove, a U-shaped block is fixedly mounted on an outer wall, close to each other, of each elastic plate, and the top of the U-shaped block extends to the upper side of the holding groove.

7. The physical friction force demonstration device according to claim 6, wherein two limiting rods are sleeved with limiting springs, the top ends of the two limiting springs are fixedly connected with the bottoms of the two elastic plates respectively, and the bottom ends of the two limiting springs are fixedly connected with the inner walls of the bottoms of the two side grooves respectively.