CN201003571Y - Three-gear plate internal meshing planetary gear transmission with small tooth difference - Google Patents

Abstract

The gear plate inner meshing planetary gear transmission with small tooth difference is composed of a body, an input shaft, a sun gear, an eccentric shaft, a planetary gear, an external gear plate, a connecting shaft, an equal load plate, an output shaft plate, and a bearing. The external gear plate adopts a three-gear plate structure, the mass of the middle external gear plate is twice that of the external gear plates on both sides, and the eccentric phase of the eccentric shaft on the middle external gear plate is the same as that on both sides There is a corresponding phase difference. The main advantages are: the balance of the inertial force and moment of inertia generated by the eccentric shaft is always guaranteed, the dynamic performance of the device is improved, the structure is compact and simple, and the vibration stability is good.

Description

Three-gear plate internal meshing planetary gear transmission with small tooth difference

technical field

The utility model belongs to a hybrid planetary gear transmission device.

Background technique

The prior art is found in the patent of invention of No. CN 1366590A disclosed by the Chinese Patent Office: the transmission device of the internal meshing planetary gear structure. In the technology disclosed in this patent, there are two external gear plates meshing with the internal gear, and the inertial force generated by the eccentric shaft in the internal meshing small tooth difference planetary gear transmission of the two external gear plate structures can be balanced, but the inertial force produced The moment of inertia cannot be balanced, which affects the dynamic performance of the transmission, especially in the case of high-speed motion, it is easy to generate vibration and noise.

Contents of the invention

The purpose of this utility model is to design a new structure of internal meshing planetary gear transmission with small tooth difference for the weakness of the above-mentioned prior art internal meshing planetary gear transmission with small tooth difference, so that the inertia generated by the eccentric shaft in the transmission device Both forces and moments of inertia can be balanced.

The technical scheme of the utility model is: the planetary gear transmission device with small tooth difference meshed in the gear plate is composed of the body 1, 9, 10 with internal teeth, the sun gear 3 installed on the input shaft 2, and the sun gear installed on the eccentric shaft 5. The planetary gear 4 meshed with the sun gear, the external gear plate 8 installed on the eccentric shaft section bearing of the eccentric shaft and meshed with the internal teeth of the machine body, the load sharing plate 7 and the output shaft plate 11 connected by the coupling shaft 16 passing through the external gear plate , Bearing 13,14,15,17 form. The structure is that the external gear plate adopts a three-gear plate structure, the mass of the middle external gear plate 6 is twice that of the external gear plates 8 on both sides, and the eccentric phase of the eccentric shaft 5 on the middle external gear plate 8 is the same as The eccentric phases on the external gear plates 6 on both sides have corresponding phase differences.

The structure of the three-gear plate inner meshing planetary gear transmission with less tooth difference described in the utility model is that the meshing of the outer gear plates 6 and 8 with the inner teeth of the machine body can adopt cycloid pin gear or involute gear tooth shape meshing .

The structure of the three-gear plate internal meshing planetary gear transmission with less tooth difference described in the utility model is that the input shaft and the output shaft are solid shafts or hollow shafts with internal spline grooves.

The working principle of the utility model is: according to the meshing principle, when the input shaft rotates, the sun gear 3 installed on the input shaft 2 drives the three planetary gears 4 to rotate, and the planetary gears 4 rotate around their own axis on the one hand, and the other On the other hand, it revolves around the axis of the sun gear. At the same time, the planetary gear 4 drives the eccentric shaft 5 to do the same rotation and revolution, and the eccentric shaft 5 drives the middle external gear plate 6 with eccentric phase difference and the external gear plates 8 on both sides to move. Under the constraints of the middle external gear plate 6 and the external gear plates 8 on both sides do cycloidal motion; at the same time, the output shaft plate 11 and the output shaft 18 output the revolution motion of the eccentric shaft.

The main advantage of the utility model is:

1. Always ensure the balance of inertial force and moment of inertia generated by the eccentric shaft, which improves the dynamic performance of the transmission device.

2. The new structure can be used for planetary gear transmissions with small tooth difference between internal gears of different tooth shapes.

3. High fatigue life, high rotation accuracy,

4. Compact and simple structure, high efficiency, large transmission ratio, good vibration stability,

Description of drawings

The utility model has four accompanying drawings, wherein:

Fig. 1 is a schematic diagram of the structure of the planetary gear transmission device of the present invention with the involute gear three-gear plate meshing and less tooth difference.

Fig. 2 is a schematic cross-sectional view of the structure of the involute gear three-gear plate internal meshing planetary gear transmission with small tooth difference of the present invention along the axis of the input shaft.

Fig. 3 is a structural schematic diagram of a planetary gear transmission device with small tooth difference meshing in the three gear plates of the cycloidal pin gear of the present invention.

Fig. 4 is a structural schematic diagram of a planetary gear transmission device with a small tooth difference in which the input shaft and the output shaft are hollow in three gear plates of the utility model.

In the attached drawings: 1. Body front plate, 2. Input shaft, 3. Sun gear, 4. Planetary gear, 5. Eccentric shaft, 6. Middle external gear plate, 7. Loading plate, 8. External gear plates on both sides , 9, the body with internal teeth, 10, the rear end plate of the body, 11, the output shaft, 12, the eccentric sleeve, 13, the eccentric shaft bearing, 14, the input shaft bearing, 15, the output shaft bearing, 16, the output shaft plate and Even load plate connecting shaft, 17, body bearing, 18, output shaft, 19, pin tooth pin, 20, pin tooth cover.

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing.

Attached Figure 1 and Figure 2 show the involute tooth-shaped three-gear plate internal meshing less tooth difference planetary gear transmission, which is composed of three sets of planetary gears 4, eccentric shaft 5, and coupling shaft 16 composed of involute teeth A three-gear plate inner meshing planetary gear transmission with few tooth differences. The three planetary gears 4 mesh with the sun gear 3; the three eccentric shafts 5 are mechanically coupled to the corresponding planetary gears 4; the three coupling shafts 16 pass through the external gear plate to mechanically couple the output shaft plate 11 and the equalizing plate 7. The basic composition of the transmission device is: an open planetary transmission mechanism plus an eccentric differential transmission mechanism plus a parallelogram mechanism plus an output mechanism. The open planetary transmission mechanism consists of a sun gear 3 and three planetary gears 4 installed on the input shaft 2; the eccentric differential transmission mechanism consists of a middle external gear plate 6, two external gear plates 8 on both sides and inner The body 9 of teeth is made up; The parallelogram mechanism is made up of three eccentric shafts 5, a middle external gear plate 6, two external gear plates 8 on both sides;

The load equalizing plate 7, the three connecting output shaft plates and the connecting shaft 16 of the equalizing plate, the output shaft plate 11 and the three eccentric shafts 5 together constitute a closed load equalizing and high rigidity structure, which improves the motion accuracy and dynamic performance of the transmission .

The external gear plate adopts a three-gear plate structure, the mass of the middle external gear plate is twice that of the external gear plates on both sides, and the eccentric phase of the eccentric shaft on the middle external gear plate is the same as that on both sides A difference of 180 degrees. The eccentric shaft bearing 13 supports the eccentric shaft on the middle external gear plate 6, the two external gear plates 8 on both sides, the output shaft plate 11 and the load sharing plate 7, thus reducing the eccentric shaft and the middle external gear plate 6, the two two sides Friction and wear between the external gear plate 8, the output shaft plate 11 and the load sharing plate 7. The front end plate 1 of the body, the body 9 and the rear end plate 10 of the body form a closed transmission box through screw connections; two input shaft support bearings 14 are respectively installed in the bearing seat of the front end plate 1 of the body and the bearing seat of the output shaft plate 11 Middle; the output shaft bearing 15 is installed in the bearing seat of the rear end plate 10 of the body; two body bearings 17 support the equal load plate 7 and the output shaft plate 11 respectively. The eccentric sleeve 12 is mounted on the eccentric shaft through a key connection, which facilitates the assembly of the three gear plates and the three eccentric shafts. The three eccentric shafts 5 and the three planetary wheels 4 are uniformly distributed on the gear plate with a difference of 120 degrees; the three connecting shafts 16 connecting the load plate and the output shaft plate are evenly distributed on the load plate and the output shaft plate with a difference of 120 degrees through the gear plate. shaft plate. The coupling shaft 16 is 60 degrees different from the eccentric shaft. The output shaft plate 11 and the output shaft 18 are integrated.

Fig. 3 is a schematic diagram of the structure of a planetary gear transmission device with three gear plates of cycloidal pin gears and three gear plates meshing internally. The internal teeth of the body are changed into the pin tooth pin 19 and the pin tooth cover 20, which constitutes the cycloidal pin gear three-gear plate meshing little tooth difference planetary gear transmission.

Fig. 4 is a schematic diagram of the structure of a three-gear plate internal meshing planetary gear transmission with a small tooth difference whose input shaft and output shaft are hollow shafts. The input shaft and output shaft are both hollow shafts with internal spline grooves. The hollow shaft facilitates the connection with the input power device and the working machine.

The utility model is suitable for various mechanical transmissions. It can be used as both a reducer and a speed increaser. It can be used to change various ordinary motors into low-speed motors. It can also be applied to various electric wrenches and grinders, etc.

Claims (3)

1. The planetary gear transmission device with small tooth difference meshing in the gear plate is composed of the body with internal teeth (1, 9, 10), the sun gear (3) installed on the input shaft (2), and the eccentric shaft (5) The planetary gear (4) engaged with the sun gear, the external gear plate (8,) installed on the eccentric shaft and meshed with the internal teeth of the body, and the load sharing plate (7) connected by the coupling shaft (16) through the external gear plate ) and output shaft plate (11), bearings (13, 14, 15, 17), characterized in that: the external gear plate adopts a three-gear plate structure, and the quality of the middle external gear plate (6) is the outer gear plate on both sides Twice the quality of the gear plate (8), the eccentric phase of the eccentric shaft (5) on the middle external gear plate (6) has a corresponding phase difference with the eccentric phase on both sides of the external gear plate (8). 2. The three-gear plate internal meshing planetary gear transmission with few tooth differences according to claim 1, characterized in that: the meshing between the external gear plates (8, 6) and the internal teeth of the body can be cycloid pin gear or involute Wire gear teeth meshing. 3. The three-gear plate internal meshing planetary gear transmission with small tooth difference according to claim 1, characterized in that: said input shaft and output shaft are solid shafts or hollow shafts with internal spline grooves.

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