CN204632239U - A planetary gear mechanism motion demonstration teaching aid - Google Patents

Abstract

The utility model discloses a kind of planetary gears motion demonstrating teaching aid, first driving mechanism connects the sun gear of planetary gears by the first transmission shaft, second driving mechanism connects the planet carrier of planetary gears by second driving shaft, two transmission shafts are respectively equipped with measure speed gears, when the first driving mechanism drives sun gear to rotate, first tachogenerator is by the rotating speed of detection first measure speed gears, obtain the rotating speed of sun gear, planetary gear rotates under the drive of sun gear, second tachogenerator is by the rotating speed of detection second measure speed gears, obtain the rotating speed of planetary gear, thus make student more directly can understand the principle of work of planetary gears, gear ratio formula can be verified according to the testing result of the first tachogenerator and the second tachogenerator simultaneously, be convenient to Students ' Learning understand.

Description

A planetary gear mechanism motion demonstration teaching aid

technical field

The utility model relates to the technical field of mechanical teaching aids, in particular to a planetary gear mechanism movement demonstration teaching aid.

Background technique

Many courses in mechanical majors require experimental demonstrations to enable students to better understand, for example, the principle of motion of the planetary gear mechanism, the various working methods and internal structures of planetary gears, and the calculation of gear transmission ratios to be learned in the course "Mechanical Principles" wait. In order to allow students to understand more intuitively, teachers usually show students the planetary gear mechanism in kind. However, this usually only helps students understand the motion principle of the planetary gear mechanism, and the gear ratio of the planetary gear is a difficult point in learning. It is often difficult for students to directly understand the gear ratio, resulting in difficulties for students to understand and low learning efficiency.

Utility model content

In order to solve the technical problems existing in the background technology, the utility model proposes a planetary gear mechanism motion demonstration teaching aid, which visually shows the working principle of the planetary gear mechanism, and can obtain the rotational speed of the sun gear and the rotational speed of the planetary gear during operation, and the planetary gear The transmission ratio formula is verified, so that students can more directly understand the knowledge of planetary gears.

The utility model proposes a planetary gear mechanism motion demonstration teaching aid, comprising: a bracket, a first driving mechanism, a second driving mechanism, a planetary gear mechanism, a first transmission shaft, a second transmission shaft, a first speed measuring sensor, a second speed measuring sensor;

The planetary gear mechanism is installed on the bracket. The planetary gear mechanism includes a sun gear, multiple planetary gears, a planetary carrier, and a ring gear. Multiple planetary gears are installed on the planetary frame. Multiple planetary gears are located around the sun gear and connected to the sun gear respectively. meshing, the ring gear fits on the outside of all planetary gears and meshes with each planetary gear;

The first transmission shaft is connected to the sun gear and is located on the same straight line as the rotation shaft of the sun gear. The first drive mechanism is connected to the end of the first transmission shaft away from the sun gear. The first transmission shaft is provided with a first speed measuring gear and a first speed measuring sensor. Connect with the first speed measuring gear;

The second transmission shaft is connected to the planetary carrier and is located on the same straight line as the rotation shaft of the planetary carrier. The second drive mechanism is connected to the end of the second transmission shaft away from the planetary carrier. The second transmission shaft is sleeved with a second speed measuring gear and a second speed measuring sensor Connect with the second speed measuring gear.

Preferably, the ring gear is fixedly connected with the bracket.

Preferably, the planetary gear mechanism includes three planet wheels.

Preferably, the first transmission shaft is a stepped shaft.

Preferably, the second transmission shaft is a stepped shaft.

In the utility model, the proposed planetary gear mechanism motion demonstration teaching aid, the first driving mechanism is connected to the sun gear of the planetary gear mechanism through the first transmission shaft, and the second driving mechanism is connected to the planet carrier of the planetary gear mechanism through the second transmission shaft. The two transmission shafts are respectively provided with speed measuring gears. When the first driving mechanism drives the sun gear to rotate, the first speed measuring sensor obtains the speed of the sun gear by detecting the speed of the first speed measuring gear, and the planetary gear rotates under the drive of the sun gear , the second speed measuring sensor obtains the speed of the planetary gear by detecting the speed of the second speed measuring gear, so that students can more directly understand the working principle of the planetary gear mechanism, and at the same time verify it according to the detection results of the first speed measuring sensor and the second speed measuring sensor The gear ratio formula is easy for students to learn and understand. Through the above optimized design of the planetary gear mechanism movement demonstration teaching aid, it has a compact structure and a reasonable design. It can intuitively display the working principle of the planetary gear mechanism, and can obtain the speed of the sun gear and the speed of the planetary gear during operation, and verify the formula of the planetary gear ratio. , so that students can more directly understand the relevant knowledge of planetary gears.

Description of drawings

Fig. 1 is a structural schematic diagram of a planetary gear mechanism motion demonstration teaching aid proposed by the utility model.

FIG. 2 is a schematic structural diagram of the planetary gear mechanism in FIG. 1 .

Detailed ways

As shown in Figures 1 and 2, Figure 1 is a structural schematic diagram of a planetary gear mechanism motion demonstration teaching aid proposed by the present invention, and Figure 2 is a structural schematic diagram of the planetary gear mechanism in Figure 1 .

Referring to Fig. 1 and 2, a kind of planetary gear mechanism motion demonstration teaching aid proposed by the utility model includes: bracket 1, planetary gear mechanism 2, first driving mechanism 3, second driving mechanism 4, first transmission shaft 5, second Transmission shaft 6, first speed measuring sensor 7, second speed measuring sensor 8;

Planetary gear mechanism 2 is installed on the support 1, and planetary gear mechanism 2 comprises sun gear 21, three planetary gears 22, planetary carrier 23, ring gear 24, and three planetary gears 22 are installed on the planetary carrier 23, and three planetary gears 22 Located around the sun gear 21 and meshing with the sun gear 21 respectively, the ring gear 24 is set outside all the planetary gears 22 and meshing with each planetary gear 22, the ring gear 24 is fixed on the bracket 1;

The first transmission shaft 5 adopts a stepped shaft, which is connected to the sun gear 21 and is on the same straight line as the rotating shaft of the sun gear 21. The first drive mechanism 3 adopts a motor driven by a 12V battery, which is connected to the first transmission shaft 5 away from the sun gear. One end of 21, the first speed measuring gear 51 is set on the first transmission shaft 5, the first speed measuring gear 51 adopts a 2-mode 20-tooth gear, and the first speed measuring sensor 7 is connected with the first speed measuring gear 51;

The second transmission shaft 6 adopts a stepped shaft, which is connected with the planet carrier 23 and is located on the same straight line with the rotation axis of the planet carrier 23. The second drive mechanism 4 adopts a motor driven by a 12V battery, which connects the second transmission shaft 6 away from the planet carrier 23. One end of the second drive shaft 6 is sleeved with a second speed measuring gear 61, the second speed measuring gear 61 adopts a 2-mode 20-tooth gear, and the second speed measuring sensor 8 is connected with the second speed measuring gear 61.

When the planetary gear mechanism motion demonstration teaching aid of this embodiment is used for demonstration, when the first drive mechanism is used to actively drive the sun gear to rotate, the first speed measuring sensor can obtain the speed of the sun gear by detecting the speed of the first speed measuring gear. Rotation occurs under the drive of the second speed measuring sensor, and the second speed measuring sensor obtains the speed of the planetary wheel by detecting the speed of the second speed measuring gear; Rotational speed, to obtain the rotational speed of the planetary gear, the sun gear rotates under the drive of the planetary gear, and the first speed sensor detects the rotational speed of the first speed measuring gear to obtain the rotational speed of the sun gear, so that students can more directly understand the work of the planetary gear mechanism At the same time, the gear transmission ratio formula can be verified according to the detection results of the first speed sensor and the second speed sensor.

In this embodiment, the proposed planetary gear mechanism motion demonstration teaching aid, the first driving mechanism is connected to the sun gear of the planetary gear mechanism through the first transmission shaft, and the second driving mechanism is connected to the planet carrier of the planetary gear mechanism through the second transmission shaft, The two transmission shafts are respectively equipped with speed measuring gears, and the sun gear or the planetary gear is driven through the first driving mechanism or the second driving mechanism. The first speed measuring sensor obtains the speed of the sun gear by detecting the speed of the first speed measuring gear. The second speed measuring sensor obtains the speed of the planetary gear by detecting the speed of the second speed measuring gear, so that students can more directly understand the working principle of the planetary gear mechanism, and at the same time verify the gear transmission according to the detection results of the first speed measuring sensor and the second speed measuring sensor It is easier for students to learn and understand than formulas. Through the above-mentioned optimized design of the planetary gear mechanism movement demonstration teaching aid, it has a compact structure and a reasonable design. It can intuitively display the working principle of the planetary gear mechanism, and can obtain the speed of the sun gear and the speed of the planetary gear during operation, and verify the formula of the planetary gear ratio. , so that students can more directly understand the relevant knowledge of planetary gears.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (9)

1. a planetary gears motion demonstrating teaching aid, it is characterized in that, comprising: support (1), planetary gears (2), the first driving mechanism (3), the second driving mechanism (4), the first transmission shaft (5), second driving shaft (6), the first tachogenerator (7), the second tachogenerator (8);

Planetary gears (2) is arranged on support (1), planetary gears (2) comprises sun gear (21), multiple planetary gear (22), planet carrier (23), gear ring (24), multiple planetary gear (22) is arranged on planet carrier (23), multiple planetary gear (22) is positioned at sun gear (21) and around also engages with sun gear (21) respectively, and gear ring (24) is enclosed within all planetary gears (22) outside and engages with each planetary gear (22);

First transmission shaft (5) is connected with sun gear (21) and is located along the same line with sun gear (21) rotating shaft, first driving mechanism (3) connects the first transmission shaft (5) one end away from sun gear (21), first transmission shaft (5) is arranged with the first measure speed gears (51), the first tachogenerator (7) is connected with the first measure speed gears (51);

Second driving shaft (6) is connected with planet carrier (23) and is located along the same line with planet carrier (23) rotating shaft, second driving mechanism (4) connects second driving shaft (6) one end away from planet carrier (23), second driving shaft (6) is arranged with the second measure speed gears (61), the second tachogenerator (8) is connected with the second measure speed gears (61).

2. planetary gears motion demonstrating teaching aid according to claim 1, is characterized in that, gear ring (24) is fixedly connected with support (1).

3. planetary gears motion demonstrating teaching aid according to claim 1, is characterized in that, planetary gears (2) comprises three planetary gears (22).

4. planetary gears motion demonstrating teaching aid according to claim 1, is characterized in that, the first transmission shaft (5) is multidiameter.

5. planetary gears motion demonstrating teaching aid according to claim 1, is characterized in that, second driving shaft (6) is multidiameter.

6. planetary gears motion demonstrating teaching aid according to claim 1, is characterized in that, the first measure speed gears (51) adopts 2 mould 20 gears.

7. planetary gears motion demonstrating teaching aid according to claim 1, is characterized in that, the second measure speed gears (52) adopts 2 mould 20 gears.

8. planetary gears motion demonstrating teaching aid according to claim 1, is characterized in that, the first driving mechanism (3) adopts by the battery-driven motor of 12V.

9. planetary gears motion demonstrating teaching aid according to claim 1, is characterized in that, the second driving mechanism (4) adopts by the battery-driven motor of 12V.