A 3D printed speed change gearbox teaching aid

Abstract

The utility model discloses a 3D printed speed change gearbox teaching aid, including a reducer housing, an input shaft, a planetary gear shaft frame, an output shaft and an upper end cover, wherein an internal gear is installed inside the reducer housing by bolts, an input shaft is installed through the planetary gear frame, a driving gear is installed at one end of the input shaft, the other end of the input shaft passes through the reducer housing and is installed with a pulley, an output shaft is vertically installed on the side of the planetary gear shaft frame away from the planetary gear, and an upper end cover is installed on one side of the reducer housing by bolts. The utility model is made by 3D printing, and its material is transparent plastic, so that the speed change gearbox teaching aid can provide sufficient transparency so that students can understand the actual principle of gear working. At the same time, real-time demonstration teaching can also facilitate the observation of the internal structure of complex machinery, get rid of the boring teaching mode of textbooks and engineering drawings, jump out of the limitation of fixed mold classrooms, and have no constraints of teaching venues.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a 3D printed speed change gear box teaching aid. Background Art

[0002] As one of the three major technologies of the "Third Industrial Revolution", 3D printing technology has gradually matured with the further development of intelligent manufacturing technology, and has made great improvements in material selection, printing accuracy and speed. It is widely used in the manufacturing fields of automotive intelligent manufacturing, aerospace and medical products. As 3D printing technology becomes more and more mature, various products can also be 3D printed, such as teaching equipment used in college courses.

[0003] In the teaching of mechanical majors, there are often many principles and working processes that are very abstract, such as the complex structure of the transmission and the difficulty in disassembly; it is very difficult to understand with some text and pictures in the book. Existing teaching equipment varies greatly. Most mechanical teaching models are metal and wooden structures. Metal and wooden materials have their advantages, but it is undeniable that their disadvantages are also particularly obvious. For example, patent No. 202321958207.0 discloses a gearbox device for simulating gear failure, including a main body, a rotating component, and an adjustment component. Among them, the bottom, housing, screw, etc. are all made of stainless steel, while the metal is heavy, the grease on the surface easily absorbs dust mixtures, is difficult to clean, and cannot clearly display the internal structure; in addition, wooden teaching molds are not easy to preserve, have low transmission accuracy, are prone to deformation, and are not waterproof.

[0004] Based on this, the utility model provides a 3D printed speed change gearbox teaching aid, which combines 3D printing with course molds to clearly present complex mechanical structures to students, and is more in line with teaching needs than existing gearbox teaching aids. Utility Model Content

[0005] The purpose of the utility model is to provide a 3D printed speed change gearbox teaching aid to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a 3D printed speed change gearbox teaching aid, comprising a pulley, a reducer housing, an input shaft, a planetary gear shaft frame, an output shaft and an upper end cover, wherein an internal gear is installed inside the reducer housing by bolts, a planetary gear shaft frame is arranged inside the internal gear, four planetary gears are installed on the planetary gear shaft frame through the planetary gear shaft, the planetary gears are meshed with the internal gears, a planetary gear frame is installed on one side of the planetary gears, an input shaft is installed through the planetary gear frame, a driving gear is installed at one end of the input shaft, and the driving gear is meshed with the planetary gears, the other end of the input shaft passes through the reducer housing and is installed with a pulley, an output shaft is vertically installed on a side of the planetary gear shaft frame away from the planetary gears, an upper end cover is installed on one side of the reducer housing by bolts, and the output shaft passes through the upper end cover.

[0007] Preferably, the pulley has a conical fascia column structure.

[0008] Preferably, a shaft sleeve is installed at the connection between the input shaft and the reducer housing, and a skeleton-type oil seal is sleeved on the shaft sleeve.

[0009] Preferably, a first quadrilateral connecting structure is provided at one end of the input shaft, and a quadrilateral through hole matching with the first quadrilateral connecting structure is provided at the middle position of the pulley.

[0010] Preferably, the other end of the input shaft is provided with an external spline, and the center position inside the driving gear is provided with an internal spline.

[0011] Preferably, the planetary gear bracket is evenly provided with first axial holes and limiting grooves, and the first axial holes and limiting grooves are staggered.

[0012] Preferably, an isolated toothless portion is provided at one end of the planetary gear.

[0013] Preferably, guide strips are evenly arranged on the planetary wheel axle frame, and the ends of the guide strips cooperate with the limiting grooves, second axial holes are evenly arranged on the planetary wheel axle frame, and the second axial holes are staggered with the guide strips, and the two ends of the planetary gear shaft are respectively installed in the first axial hole and the second axial hole.

[0014] Preferably, an internal spline is provided at the center position of the planetary gear shaft frame, an external spline is provided at one end of the output shaft, and a second quadrilateral connection structure is provided at the other end of the output shaft.

[0015] Preferably, a sealing ring is installed at the connection between the output shaft and the upper end cover, and an elastic retaining ring is sleeved on the output shaft outside the upper end cover.

[0016] Preferably, the speed change gear box teaching aid is printed by a light-curing printer.

[0017] Preferably, the speed change gearbox teaching aid is designed and modeled using SoildWorks.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the 3D printed speed gearbox teaching aid in the present application is made of transparent plastic, so that the speed gearbox teaching aid can provide sufficient transparency so that students can understand the actual principle of gear working. At the same time, teachers use 3D printed teaching molds for real-time demonstration teaching, which can also facilitate the observation of complex mechanical internal structures, get rid of the boring teaching mode of textbooks and engineering drawings, jump out of the limitations of fixed mold classrooms, and have no constraints on teaching venues; 3D printed teaching aids do not require a large number of metalworking tools and cumbersome processing technology, can integrate complex models and components, and can accurately control the parameters of teaching aids, realize mass production and customization, and effectively reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall explosion structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the pulley structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the reducer housing structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the reducer housing of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the planetary gear support of the utility model;

[0024] Figure 6 This is a schematic diagram of the input shaft structure of the utility model;

[0025] Figure 7 This is a schematic diagram of the internal gear structure of the utility model;

[0026] Figure 8 This is a schematic diagram of the active gear structure of the utility model;

[0027] Fig. 9 This is a schematic diagram of the planetary gear structure of the utility model;

[0028] Fig.10 This is a schematic diagram of the structure of the planetary gear axle frame of the utility model;

[0029] Fig.11 This is a schematic diagram of the output shaft structure of the utility model;

[0030] Fig.12This is a schematic diagram of the upper end cover structure of the utility model;

[0031] Fig.13 It is a schematic diagram of the cross-sectional structure of the upper end cover of the utility model.

[0032] In the figure: 1. pulley; 2. reducer housing; 3. bushing; 4. skeleton oil seal; 5. input shaft; 6. planetary gear bracket; 501. first quadrilateral connection structure; 601. first shaft hole; 602. limit groove; 7. internal gear; 8. driving gear; 9. planetary gear; 901. isolation toothless portion; 10. planetary gear shaft; 11. planetary gear shaft bracket; 1101. guide strip; 1102. second shaft hole; 12. output shaft; 1201. second quadrilateral connection structure; 13. sealing ring; 14. upper end cover; 15. elastic retaining ring; 16. internal spline; 17. external spline. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the utility model shall fall within the scope of protection of the utility model.

[0034] See also Figure 1-13 , the utility model provides an embodiment: a 3D printed speed change gearbox teaching aid, including a pulley 1, a reducer housing 2, an input shaft 5, a planetary gear shaft frame 11, an output shaft 12 and an upper end cover 14, the reducer housing 2 is internally mounted with an internal gear 7 by bolts, the internal gear 7 is a fixed part, meshing with the planetary gear 9, and fixed in the reducer housing 2, forming the basis of the support system and transmission technology;

[0035] A planetary gear shaft frame 11 is arranged inside the inner gear 7, and four planetary gears 9 are mounted on the planetary gear shaft frame 11 through the planetary gear shaft 10. The planetary gears 9 are meshed with the inner gear 7, and an isolation toothless portion 901 is arranged at one end of the planetary gear 9 for isolation from the planetary gear shaft frame 11;

[0036] A planetary gear support 6 is installed on one side of the planetary gear 9, and the planetary gear support 6 is evenly provided with first shaft holes 601 and limiting grooves 602, and the first shaft holes 601 and limiting grooves 602 are staggered;

[0037] The planetary gear shaft frame 11 is evenly provided with guide strips 1101, and the ends of the guide strips 1101 cooperate with the limiting grooves 602. The planetary gear shaft frame 11 is evenly provided with second shaft holes 1102, and the second shaft holes 1102 are staggered with the guide strips 1101. The two ends of the planetary gear shaft 10 are respectively installed in the first shaft hole 601 and the second shaft hole 1102. The planetary gear shaft 10 serves as a connecting piece between the planetary gear 9 and the planetary gear shaft frame 11, and plays a role in fixing the planetary gear 9.

[0038] The four planetary gears 9 can be fixed by combining the planetary gear support 6 with the guide bar 1101 on the planetary gear shaft support 11. The guide bar 1101 can lock the axial direction and change the movement direction of the planetary gear 9, so that the planetary gear 9 rotates around the output shaft 12, thereby transmitting power;

[0039] An inner spline 16 is provided at the center of the planetary gear shaft frame 11, an outer spline 17 is provided at one end of the output shaft 12, and a second quadrilateral connection structure 1201 is provided at the other end of the output shaft 12 for connection of power transmission. The second quadrilateral connection structure 1201 can be conveniently matched with the power transmission section and can bear a larger output torque;

[0040] An input shaft 5 is installed through the planetary gear bracket 6, a driving gear 8 is installed at one end of the input shaft 5, and the driving gear 8 and the planetary gear 9 are meshed with each other, and the other end of the input shaft 5 passes through the reducer housing 2 and is installed with a pulley 1, which is a conical fascia column structure, so that the pulley 1 has a higher transmission strength;

[0041] A shaft sleeve 3 is installed at the connection between the input shaft 5 and the reducer housing 2. The shaft sleeve 3 mainly plays a positioning role in the transmission mechanism and can also be used to reduce the friction and wear of the input shaft 5. A skeleton oil seal 4 is sleeved on the shaft sleeve 3. The skeleton oil seal 4 is used to prevent leakage of the oil lubrication part of the input shaft 5 and maintain the normal working state of the input shaft 5. It can maintain stable sealing performance under harsh working environments such as high speed, high temperature, and high pressure, reduce the wear and failure rate of the input shaft 5, and improve the reliability and operation efficiency of the input shaft 5;

[0042] A first quadrilateral connection structure 501 is provided at one end of the input shaft 5, and a quadrilateral through hole matching with the first quadrilateral connection structure 501 is provided at the middle position of the pulley 1. The first quadrilateral connection structure 501 can be conveniently matched with the pulley 1 and can bear a larger input torque;

[0043] The other end of the input shaft 5 is provided with an external spline 17, and the center position inside the driving gear 8 is provided with an internal spline 16;

[0044] An output shaft 12 is vertically mounted on the side of the planetary gear frame 11 away from the planetary gear 9, and an upper end cover 14 is mounted on one side of the reducer housing 2 by bolts, and the output shaft 12 passes through the upper end cover 14;

[0045] A sealing ring 13 is installed at the connection between the output shaft 12 and the upper end cover 14. The sealing ring 13 plays a sealing role to prevent dust from entering the reducer housing 2 and being adsorbed on the lubricating oil, thereby affecting the normal operation of the transmission structure. An elastic retaining ring 15 is sleeved on the output shaft 12 outside the upper end cover 14 to fix the position of the output shaft 12.

[0046] The speed change gearbox teaching aid of this application is 3D printed using a photocuring printer. The consumables are water-washable resin. In order to ensure the accurate geometric shape and relative positions of each component, Solidworks software is used for modeling. The model data is imported into the printer for model printing. After printing, it is rinsed with fluid water, then placed in a post-curing machine for post-curing treatment, and finally assembled. When using the teaching aid: First, fix the internal gear 7 inside the reducer housing 2 by bolts. At the same time, insert the input shaft 5 into the reducer housing 2, and install the shaft sleeve 3 and the skeleton oil seal 4 at the connection between the input shaft 5 and the reducer housing 2. Install the pulley 1 at one end of the input shaft 5, and install the driving gear 8 at the other end of the input shaft 5. Then, install the four planetary gears 9 on the planetary gear shaft frame 11 through the planetary gear shaft 10, so that the planetary gears 9 are meshed with the driving gear 8, and install the planetary gear bracket 6 on the planetary gear shaft frame 11 through the guide strip 1101. Finally, install the output shaft 12 on the planetary gear shaft frame 11, and install the end cover 14 on the side of the reducer housing 2 by bolts. , so that the output shaft 12 passes through the upper end cover 14, and a sealing ring 13 is installed at the connection between the output shaft 12 and the upper end cover 14, and an elastic retaining ring 15 is fixed on the output shaft 12 outside the upper end cover 14; during teaching, due to the 3D model design and printing production, the dimensional accuracy is high, which is more in line with different teaching needs; its material is transparent plastic, so that the speed change gear box teaching aid can provide sufficient transparency so that students can understand the actual principle of gear work. At the same time, the teacher uses the 3D printed teaching mold for real-time demonstration teaching, which is also convenient for observing the internal structure of complex machinery, getting rid of the boring teaching mode of textbooks and engineering drawings, jumping out of the limitations of fixed mold classrooms, and without the constraints of teaching venues.

Claims

1. A 3D printed speed change gearbox teaching aid, characterized in that: The invention comprises a pulley (1), a reducer housing (2), an input shaft (5), a planetary gear shaft frame (11), an output shaft (12) and an upper end cover (14); an internal gear (7) is installed inside the reducer housing (2) by means of bolts; a planetary gear shaft frame (11) is arranged inside the internal gear (7); four planetary gears (9) are installed on the planetary gear shaft frame (11) via planetary gear shafts (10); the planetary gears (9) and the internal gear (7) are meshed with each other; a planetary gear frame (6) is installed on one side of the planetary gear (9); An input shaft (5) is installed in the planetary gear support (6) in a penetrating manner, a driving gear (8) is installed at one end of the input shaft (5), and the driving gear (8) and the planetary gear (9) are meshed with each other, the other end of the input shaft (5) penetrates the reducer housing (2) and is installed with a pulley (1), an output shaft (12) is vertically installed on the side of the planetary gear support (11) away from the planetary gear (9), an upper end cover (14) is installed on one side of the reducer housing (2) by bolts, and the output shaft (12) penetrates the upper end cover (14).

2. A 3D printed speed change gearbox teaching aid according to claim 1, characterized in that: The pulley (1) is in the form of a conical fascia column structure.

3. A 3D printed speed change gearbox teaching aid according to claim 1, characterized in that: A shaft sleeve (3) is installed at the connection between the input shaft (5) and the reducer housing (2), and a skeleton-type oil seal (4) is sleeved on the shaft sleeve (3).

4. The 3D printed speed change gearbox teaching aid according to claim 1, characterized in that: A first quadrilateral connection structure (501) is provided at one end of the input shaft (5), and a quadrilateral through hole matching the first quadrilateral connection structure (501) is provided at the middle position of the pulley (1).

5. The 3D printed speed change gearbox teaching aid according to claim 1, characterized in that: The other end of the input shaft (5) is provided with an external spline (17), and the center position inside the driving gear (8) is provided with an internal spline (16).

6. The 3D printed speed change gearbox teaching aid according to claim 1, characterized in that: The planetary gear support (6) is evenly provided with first shaft holes (601) and limiting grooves (602), and the first shaft holes (601) and limiting grooves (602) are arranged in a staggered manner.

7. The 3D printed speed change gearbox teaching aid according to claim 1, characterized in that: An isolated toothless portion (901) is provided at one end of the planetary gear (9).

8. The 3D printed speed change gearbox teaching aid according to claim 6, characterized in that: The planetary gear shaft frame (11) is evenly provided with guide strips (1101), and the ends of the guide strips (1101) cooperate with the limiting grooves (602). The planetary gear shaft frame (11) is evenly provided with second shaft holes (1102), and the second shaft holes (1102) and the guide strips (1101) are staggered. The two ends of the planetary gear shaft (10) are respectively installed in the first shaft hole (601) and the second shaft hole (1102).

9. The 3D printed speed change gearbox teaching aid according to claim 1, characterized in that: An internal spline (16) is provided at the center of the planetary gear shaft frame (11), an external spline (17) is provided at one end of the output shaft (12), and a second quadrilateral connection structure (1201) is provided at the other end of the output shaft (12).

10. The 3D printed speed change gearbox teaching aid according to claim 1, characterized in that: The speed change gearbox teaching aid is printed and formed by using a light-curing printer.

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