CN204791752U - Planetary gear train teaching aid - Google Patents

Abstract

The utility model relates to a teaching aid for a planetary gear system, which comprises a platform, a planetary gear mechanism installed on the platform, an operating component and a dial installed on the planetary gear mechanism, and the planetary gear mechanism includes: a sun gear, which is rotatably installed on the platform The planetary gear is engaged with the sun gear and rotates synchronously with the sun gear; the inner ring gear is engaged with the planetary gear and rotates synchronously with the planetary gear, and the planetary gear is located between the sun gear and the planetary gear between the inner ring gears mentioned above; the planetary carrier, the planetary gear is installed on the planetary carrier; the operation component is fixedly connected to the planetary gear mechanism, and is used to control the rotation of the sun gear, the inner ring gear and the planetary carrier; the dial is fixedly installed on the stand, and Set concentrically with the planetary gear, as the rotation reference of the planetary gear. The above-mentioned planetary gear system teaching aid can intuitively and clearly reflect the basic structure, transmission mode and transmission characteristics of the planetary gear mechanism, which is convenient for students to understand the working state of the planetary gear system and achieve better learning effects.

Description

Planetary Gear System Teaching Aids

technical field

The utility model relates to the field of teaching aids, in particular to a planetary wheel teaching aid.

Background technique

Mechanical Principles is an important technical basic course that introduces the basic knowledge, basic theories and basic methods of mechanism design commonly used in various mechanical products. It is a compulsory course for mechanical and related engineering majors. The epicyclic wheel system is a difficult and important point in the teaching of mechanical principles, which requires students to master it well.

At present, in the teaching process of the epicyclic gear system, especially the planetary gear system, teachers usually use multimedia means to explain with animation and diagrams, and students use their imagination to understand. Some students cannot fully understand the mechanism of transmission through this abstract means. Principle, so good teaching effect cannot be guaranteed.

Utility model content

Based on this, it is necessary to provide a specific and intuitive teaching aid for planetary gear trains for the abstract and difficult to understand problems in the teaching of planetary gear trains.

A teaching aid for a planetary gear train, comprising a platform, a planetary gear mechanism mounted on the platform, an operating assembly and a dial mounted on the planetary gear mechanism, and the planetary gear mechanism includes:

a sun gear, rotatably mounted on the stand;

The planetary gear is engaged with the sun gear and rotates synchronously with the sun gear;

an inner ring gear meshing with the planetary gear and rotating synchronously with the planetary gear, the planetary gear being located between the sun gear and the inner ring gear; and

a planetary carrier, the planetary gear is mounted on the planetary carrier;

The operating component is fixedly connected to the planetary gear mechanism, and is used to control the rotation of the sun gear, the ring gear and the planetary carrier;

The dial is fixedly mounted on the stand and concentrically arranged with the planetary wheel as a reference for the rotation of the planetary wheel.

The planetary gear system teaching aid mentioned above can intuitively and clearly reflect the basic structure, transmission mode and transmission characteristics of the planetary gear mechanism through the planetary gear mechanism and the dial installed on the stand, and can easily adjust the input wheel and The rotation speed of the output wheel is convenient for students to understand the working state of the planetary gear system and achieve a better learning effect.

In one of the embodiments, there are multiple planetary gears, and the multiple planetary gears are arranged at intervals and surround the sun gear.

In one of the embodiments, the planetary carrier is provided with a fixed shaft cooperating with the planetary gear, so as to limit the movement of the planetary gear along its central axis.

In one of the embodiments, the number of the planetary gears is three.

In one embodiment, the planet carrier has an equilateral triangle structure, and the fixed shafts are arranged at three vertices of the planet carrier to connect the planet wheels.

In one embodiment, the operating component includes a sun gear handle fixed to the sun gear, a planetary gear handle fixed to the planetary gear, and an inner ring gear handle fixed to the inner ring gear.

In one of the embodiments, the dial is disc-shaped, and the diameter of the dial is larger than the diameter of the planetary wheel, and the dial is provided with interval scales along the circumference to form the planetary wheel The rotation reference.

Description of drawings

FIG. 1 is a schematic structural view of a teaching aid for a planetary gear train according to an embodiment.

Detailed ways

In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present utility model are provided in the accompanying drawings. However, the invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in FIG. 1 , a teaching aid 100 for a planetary gear train in this preferred embodiment includes a stand 20 , a planetary gear mechanism 40 mounted on the stand 20 , an operating component (not shown) and a dial 80 .

The planetary gear mechanism 40 includes a sun gear 42 , a planetary gear 44 and a ring gear 46 . The sun gear 42 is rotatably mounted on the stand 20 . The planetary gear 44 meshes with the sun gear 42 and the ring gear 46 at the same time, is located between the sun gear 42 and the ring gear 46 , and rotates synchronously with the sun gear 42 and the ring gear 46 .

Specifically, there are multiple planetary wheels 44 , and more specifically, each planetary wheel 44 has the same shape and size. A plurality of planetary gears 44 are arranged at intervals and surround the sun gear 42 . Rotating the sun gear 42 can drive a plurality of planetary gears 44 to rotate. In some other embodiments, the number of teeth and the size of the sun gear 42 and the planetary gear 44 can be set as required.

The planetary gear mechanism 40 further includes a planetary carrier 48 , and the planetary gear 44 is mounted on the planetary carrier 48 . Specifically, a fixed shaft cooperating with the planetary gear 44 is provided on the planet carrier 48 to limit the movement of the planetary gear 44 along its central axis. More specifically, the fixed shaft is installed at the center of the planetary gear 44 , and the planetary gear 44 rotates around the fixed shaft.

In this embodiment, there are three planetary gears 44 , and the planetary carrier 48 also includes a tripod, and the tripod is in the form of an equilateral triangle. The three fixed shafts are respectively arranged at the three vertices of the tripod of the planetary frame 48 to install the three planetary gears 44 so that the planetary gears 44 evenly surround the sun gear 42 and keep the original distance during rotation. It can be understood that the number of the planetary gears 44 and the shape of the planetary carrier 48 are not limited thereto, and can be set as required.

The planetary gear train teaching aid 100 also includes an operating component, which is fixedly connected to the planetary gear mechanism 40 to control the rotation of the sun gear 42 , the ring gear 46 and the planet carrier 48 .

Specifically, the operating assembly includes a sun gear handle 62 fixed to the sun gear 42 , a planetary gear handle 64 fixed to the planetary gear 44 , and an inner ring gear handle 66 fixed to the inner ring gear 46 . In this way, the operation of the planetary gear mechanism 40 can be controlled by operating the components, and the input and output wheels, speed and direction of rotation can be changed, so that the planetary gear mechanism 40 can have different transmission states, fully meeting the teaching requirements, without the need for the operator to directly toggle the gears , making the demonstration operation more convenient.

The dial 80 is fixedly installed on the stand 20 and concentric with one of the planetary wheels 44 .

Specifically, the dial 80 is disc-shaped and has a diameter greater than that of the concentric planetary wheel 44 , and is provided with interval scales along the circumference to form a reference for the rotation of the planetary wheel 44 . In this embodiment, the sun gear 42 is rotated by the sun gear operating handle 64 to make the sun gear 42 rotate as the driving wheel of the planetary gear train and drive the planetary gear 44 to rotate. A planetary wheel 42 provided with a dial 80 is used as an output wheel, and the dial 80 can be used as a reference to observe the angle of rotation of the planetary wheel 42 within a certain period of time, thereby obtaining the direction of rotation and the speed of rotation of the planetary wheel 42 as the output wheel. The speed of rotation of the sun gear 42 is used to understand the gear ratio. It can be understood that in some other embodiments, the dial 80 may not be provided. In addition, the diameter of the dial 80 is larger than the diameter of the planetary wheel 44 , so that the scale can be seen when the scale is arranged on the edge of the dial 80 , which is convenient for observation.

In this embodiment, the planetary gear train teaching aid 100 is made of plastic, which is light in weight and low in cost, without affecting the teaching effect. It can be understood that the planetary gear train teaching aid 100 can be made of other materials.

The transmission mode of above-mentioned planetary gear mechanism 40 is as follows:

When the sun gear 42 rotates, it can drive the planetary gear 44 to rotate around its own central axis, and at the same time rotate around the central axis of the sun gear 42. The inner ring gear 46 follows the planetary gear 44 and rotates with the central axis of the sun gear 42 as the rotation axis. Limiting planetary gear 44.

The above-mentioned planetary gear system teaching aid 100 installs the planetary gear mechanism 40 on the stand 20, and the operator can control the gears in the planetary gear mechanism 40 through the operating components, change the motion state of the gears, and change the output wheel and the input wheel; The dial 80 of the planetary gear 44 can monitor the change of the rotating speed and the direction of rotation of the output wheel in real time, so that students can intuitively understand the structure of the planetary gear train, have a deeper understanding of its transmission principle, and achieve a good learning effect.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be interpreted as a limitation on the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (7)

1. A planetary gear train teaching aid, characterized in that it comprises a stand, a planetary gear mechanism mounted on said stand, an operating assembly and a dial mounted on said planetary gear mechanism, said planetary gear mechanism comprising: a sun gear, rotatably mounted on the stand; The planetary gear is engaged with the sun gear and rotates synchronously with the sun gear; an inner ring gear meshing with the planetary gear and rotating synchronously with the planetary gear, the planetary gear being located between the sun gear and the inner ring gear; and a planetary carrier, the planetary gear is mounted on the planetary carrier; The operating component is fixedly connected to the planetary gear mechanism, and is used to control the rotation of the sun gear, the ring gear and the planetary carrier; The dial is fixedly mounted on the stand and concentrically arranged with the planetary wheel as a reference for the rotation of the planetary wheel. 2 . The teaching aid for planetary gear train according to claim 1 , characterized in that, there are multiple planetary gears, and the multiple planetary gears are arranged at intervals and surround the sun gear. 3 . 3 . The planetary gear train teaching aid according to claim 2 , wherein the planetary carrier is provided with a fixed shaft cooperating with the planetary gear to limit the movement of the planetary gear along its central axis. 4 . 4. The planetary gear train teaching aid according to claim 3, wherein the number of said planetary gears is three. 5 . The planetary gear train teaching aid according to claim 4 , wherein the planetary carrier is in an equilateral triangle structure, and the fixed shafts are arranged at three vertices of the planetary carrier to connect the planetary gears. 6 . 6. The teaching aid for planetary gear train according to claim 1, characterized in that, the operating components include a sun gear handle fixed to the sun gear, a planet gear handle fixed to the planet gear, and a handle fixed to the sun gear. The ring gear handle of the ring gear. 7. The planetary gear train teaching aid according to claim 1, wherein the dial is disc-shaped, and the diameter of the dial is larger than the diameter of the planetary wheel, and the dial is arranged along the circumference There are spaced graduations to form a rotational reference for the planet wheels.