CN210667387U - Teaching demonstration appliance - Google Patents
Teaching demonstration appliance Download PDFInfo
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- CN210667387U CN210667387U CN201921873229.0U CN201921873229U CN210667387U CN 210667387 U CN210667387 U CN 210667387U CN 201921873229 U CN201921873229 U CN 201921873229U CN 210667387 U CN210667387 U CN 210667387U
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- base
- guide rod
- circular
- hollow cavity
- holes
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Abstract
The utility model relates to a teaching demonstration appliance, a guide rod (102) is horizontally arranged on the upper surface of a base (1), a slide block (101) is sleeved on the guide rod (102) in a sliding way, and a tension meter (103) arranged on the base (1) is connected with the slide block (101); base (1) is a hollow structure, evenly be provided with a plurality of circular through-holes (2) on base (1) upper surface, the level is provided with a lifter plate (3) in the cavity of base (1), be provided with a plurality of screws on lifter plate (3), the upper surface of this lifter plate (3) is provided with a plurality of universal supporting wheel (6), and a plurality of universal supporting wheel (6) are located a plurality of circular through-holes (2) respectively under. The utility model relates to a teaching demonstration apparatus can audio-visually demonstrate frictional force, and the student of being convenient for experiences.
Description
Technical Field
The utility model relates to a teaching demonstration apparatus especially relates to a teaching apparatus for demonstrating frictional force.
Background
At present, in mechanics teaching, a part of students have poor understanding on rolling friction and sliding friction, and the difference between the rolling friction and the sliding friction cannot be intuitively recognized through simple teaching explanation; whereas conventional demonstration experiments confirm the comparison between the two. Accordingly, there is a need for an educational presentation that overcomes the above-mentioned problems.
Disclosure of Invention
An object of the utility model is to overcome the aforesaid not enough, provide a teaching demonstration apparatus, can audio-visually demonstrate the frictional force, the student of being convenient for experiences.
The purpose of the utility model is realized like this:
a teaching demonstration tool comprises a base, wherein a guide rod is horizontally arranged on the upper surface of the base, a sliding block is sleeved on the guide rod in a sliding mode, the aperture of a through hole for the guide rod to be inserted into is larger than the outer diameter of the guide rod, and a tension meter arranged on the base is connected with the sliding block; the base is of a hollow structure, a plurality of circular through holes are uniformly formed in the upper surface of the base, a lifting plate is horizontally arranged in the hollow cavity of the base, a plurality of screw holes are formed in the lifting plate, a plurality of universal supporting wheels are arranged on the upper surface of the lifting plate and are respectively positioned under the circular through holes, the diameter of each universal supporting wheel is smaller than the diameter of each circular through hole, a motor reducer assembly is arranged in or outside the hollow cavity of the base, a plurality of driving shafts of the motor reducer assembly are horizontally inserted into the hollow cavity of the base, a plurality of driving bevel gears are sleeved at one end, positioned in the hollow cavity of the base, of each driving shaft, the tail end of each driving shaft is erected on the inner side wall of the base through a bearing seat, a plurality of vertical shafts are vertically arranged in the hollow cavity of the base, and the bottoms of the vertical shafts are arranged on the inner wall of the bottom of the base through bearing seats, the outer wall of the upper part of the vertical shaft is provided with an external thread to form a screw section, the screw section is arranged in the screw hole of the lifting plate in a rotating mode, and the vertical shaft is sleeved with a driven bevel gear meshed with the driving bevel gear.
The utility model relates to a teaching demonstration apparatus, motor reducer assembly comprises motor and many output shaft gear reduction box.
The utility model relates to a teaching demonstration apparatus, two connecting plates are vertically installed on the base upper surface, and the guide arm is connected between two connecting plates.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model can be switched conveniently under two friction modes, and students can experience friction forces with different sizes visually; meanwhile, the lifting of the universal supporting wheel can be conveniently replaced by hands, and the difference between sliding friction and rolling friction can be directly experienced, so that the understanding of the universal supporting wheel can be deepened.
Drawings
Fig. 1 is the utility model relates to a teaching demonstration aid's schematic structure.
Fig. 2 is a top view of the base of the teaching demonstration device of the present invention.
Fig. 3 is a cross-sectional view of the base of the teaching demonstration device.
Wherein:
a slide block 101, a guide rod 102 and a tension meter 103;
the device comprises a base 1, a circular through hole 2, a lifting plate 3, a motor reducer assembly 4, a vertical shaft 5 and universal supporting wheels 6;
a drive shaft 4.1, a drive bevel gear 4.2;
screw section 5.1, driven bevel gear 5.2.
Detailed Description
Referring to fig. 1 to 3, the utility model relates to a teaching demonstration appliance, which comprises a base 1, a guide rod 102 is horizontally installed on the upper surface of the base 1, a slider 101 is slidably installed on the guide rod 102, the aperture of a through hole for the guide rod 102 to be inserted into of the slider 101 is larger than the outer diameter of the guide rod 102, and a tension meter 103 installed on the base 1 is connected with the slider 101;
the base 1 is of a hollow structure, a plurality of circular through holes 2 are uniformly arranged on the upper surface of the base 1, a lifting plate 3 is horizontally arranged in a hollow cavity of the base 1, a plurality of screw holes are arranged on the lifting plate 3, a plurality of universal supporting wheels 6 are arranged on the upper surface of the lifting plate 3, the universal supporting wheels 6 are respectively positioned under the circular through holes 2, the diameter of each universal supporting wheel 6 is smaller than the aperture of each circular through hole 2, a motor reducer assembly 4 is arranged in the hollow cavity of the base 1 or outside the base 1, a plurality of driving shafts 4.1 of the motor reducer assembly 4 are horizontally inserted in the hollow cavity of the base 1, a plurality of driving bevel gears 4.2 are sleeved at one end of each driving shaft 4.1 in the hollow cavity of the base 1, the tail end of each driving shaft 4.1 is erected on the inner side wall of the base 1 through a bearing seat, a plurality of vertical shafts 5 are vertically arranged in the hollow cavity of the base 1, the bottom of the vertical shaft 5 is arranged on the inner wall of the bottom of the base 1 through a bearing seat, the outer wall of the upper part of the vertical shaft 5 is provided with an external thread to form a screw section 5.1, the screw section 5.1 is screwed in the screw hole of the lifting plate 3, and the vertical shaft 5 is sleeved with a driven bevel gear 5.2 meshed with a driving bevel gear 4.2;
further, the motor reducer assembly 4 is composed of a motor and a multi-output shaft gear reducer;
furthermore, two connecting plates are vertically arranged on the upper surface of the base 1, and the guide rod 102 is connected between the two connecting plates;
during demonstration:
firstly, demonstrating sliding friction force, namely driving a lifting plate 3 to drive a universal supporting wheel 6 to descend by a motor reducer assembly 4, so that a demonstrated sliding block 101 stably rests on the upper surface of a base 1 and then slides, and recording the indication number on a tension meter 103;
and secondly, rolling friction demonstration, namely starting a motor reducer assembly 4 to drive a lifting plate 3 to ascend, so that the topmost part of a universal supporting wheel 6 penetrates through a circular through hole 2, at the moment, placing a sliding block 101 on the universal supporting wheel 6 to conveniently and loosely pull the universal supporting wheel to run, and recording the indication number on a tension meter 103 and the sliding friction force to clearly know the difference between the indication number and the sliding friction force.
Therefore, with the help of the utility model discloses can let the audio-visual difference of experiencing between two kinds of frictional forces of student.
In addition: it should be noted that the above-mentioned embodiment is only a preferred embodiment of the present patent, and any modification or improvement made by those skilled in the art based on the above-mentioned conception is within the protection scope of the present patent.
Claims (3)
1. A teaching demonstration appliance is characterized in that: the tension meter comprises a base (1), wherein a guide rod (102) is horizontally arranged on the upper surface of the base (1), a sliding block (101) is sleeved on the guide rod (102) in a sliding mode, the aperture of a through hole for the guide rod (102) to be inserted into is larger than the outer diameter of the guide rod (102) of the sliding block (101), and a tension meter (103) arranged on the base (1) is connected with the sliding block (101);
the base (1) is of a hollow structure, a plurality of circular through holes (2) are uniformly formed in the upper surface of the base (1), a lifting plate (3) is horizontally arranged in a hollow cavity of the base (1), a plurality of screw holes are formed in the lifting plate (3), a plurality of universal supporting wheels (6) are arranged on the upper surface of the lifting plate (3), the universal supporting wheels (6) are respectively positioned under the circular through holes (2), the diameter of each universal supporting wheel (6) is smaller than the diameter of each circular through hole (2), a motor reducer assembly (4) is arranged in the hollow cavity of the base (1) or outside the base (1), a plurality of driving shafts (4.1) of the motor reducer assembly (4) are horizontally inserted in the hollow cavity of the base (1), a plurality of driving bevel gears (4.2) are sleeved at one end of each driving shaft (4.1) positioned in the hollow cavity of the base (1), and the end of drive shaft (4.1) erects on the inside wall of base (1) through the bearing frame, the vertical many vertical shafts (5) that are provided with in the cavity of base (1), the bottom of vertical shaft (5) passes through the bearing frame and sets up on the bottom inner wall of base (1), set up external screw thread constitution screw rod section (5.1) on the upper portion outer wall of vertical shaft (5), and this screw rod section (5.1) arrange in the screw of above-mentioned lifter plate (3) soon, and the cover is equipped with driven bevel gear (5.2) with initiative bevel gear (4.2) engaged with on vertical shaft (5).
2. An educational presentation aid as claimed in claim 1, wherein: the motor reducer assembly (4) is composed of a motor and a multi-output shaft gear reducer.
3. An educational presentation aid as claimed in claim 1, wherein: two connecting plates are vertically arranged on the upper surface of the base (1), and the guide rod (102) is connected between the two connecting plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921873229.0U CN210667387U (en) | 2019-11-03 | 2019-11-03 | Teaching demonstration appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921873229.0U CN210667387U (en) | 2019-11-03 | 2019-11-03 | Teaching demonstration appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210667387U true CN210667387U (en) | 2020-06-02 |
Family
ID=70813865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921873229.0U Expired - Fee Related CN210667387U (en) | 2019-11-03 | 2019-11-03 | Teaching demonstration appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210667387U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284402A (en) * | 2021-05-17 | 2021-08-20 | 许文龙 | A novel demonstration teaching aid for physics frictional force experiment |
-
2019
- 2019-11-03 CN CN201921873229.0U patent/CN210667387U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284402A (en) * | 2021-05-17 | 2021-08-20 | 许文龙 | A novel demonstration teaching aid for physics frictional force experiment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 Termination date: 20201103 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |