阅读说明：本技术 一种双内啮合二挡变速机构 (Double-inner-gearing two-gear speed change mechanism ) 是由 邱文刚 于 2021-09-10 设计创作，主要内容包括：本发明提供一种双内啮合二挡变速机构,包括输入轴、输出轴、太阳轮、齿环和齿圈,太阳轮通过使用花键安装于输入轴上,齿圈通过使用花键安装于输出轴上,齿环内周面设置有内齿,齿环外周面设置有外齿,太阳轮与齿环内齿啮合,齿圈与齿环外齿啮合,齿环内齿、外齿齿廓均为摆线。采用本发明的技术方案,采用内外周面分别设置有摆线轮齿的齿环取代现有渐开线行星齿轮,提高了齿轮传动机构的重合度,摆线齿轮传动机构滑动率低并且为恒定常数,传动更平稳,抗冲击振动能力更强,摆线齿轮外形几何尺寸更小,输出扭矩则更大,减小了整个变速机构的外形体积和重量,另外,摆线齿轮对于加工制造精度和装配精度的要求较低,降低了装配难度。(The invention provides a double-internal-meshing two-gear speed change mechanism which comprises an input shaft, an output shaft, a sun gear, a gear ring and a gear ring, wherein the sun gear is installed on the input shaft through a spline, the gear ring is installed on the output shaft through the spline, internal teeth are arranged on the inner circumferential surface of the gear ring, external teeth are arranged on the outer circumferential surface of the gear ring, the sun gear is meshed with the internal teeth of the gear ring, the gear ring is meshed with the external teeth of the gear ring, and tooth profiles of the internal teeth and the external teeth of the gear ring are cycloids. By adopting the technical scheme of the invention, the gear ring with the cycloid gear teeth respectively arranged on the inner peripheral surface and the outer peripheral surface is adopted to replace the existing involute planetary gear, the contact ratio of the gear transmission mechanism is improved, the cycloid gear transmission mechanism has low sliding rate and constant, more stable transmission, stronger shock and vibration resistance, smaller outline geometric dimension of the cycloid gear and larger output torque, the external shape volume and weight of the whole speed change mechanism are reduced, in addition, the requirements of the cycloid gear on the processing and manufacturing precision and the assembly precision are lower, and the assembly difficulty is reduced.)

1. The utility model provides a two inner engagements two speed change mechanism, includes input shaft (1), output shaft (10), sun gear (7), ring gear (8) and ring gear (9), sun gear (7) through use the spline install in on input shaft (1), ring gear (9) through use the spline install in on output shaft (10), ring gear (8) inner peripheral surface is provided with the internal tooth, ring gear (8) outer peripheral surface is provided with the external tooth, sun gear (7) with ring gear (8) internal tooth meshing, ring gear (9) with ring gear (8) external tooth meshing, ring gear (8) internal tooth, external tooth profile are the cycloid.

2. A dual internal-gear two-gear transmission mechanism according to claim 1, wherein: two inner engagements keep off speed change mechanism still includes clutch (3), stopper (6) and planet carrier (4), clutch (3) through use the spline install in on input shaft (1), planet carrier (4) through use antifriction bearing install in on input shaft (1), ring gear (8) are installed on planet carrier (4) through using antifriction bearing, and input shaft (1), output shaft (10) and clutch (3), planet carrier (4), stopper (6) all coaxial arrangement, ring gear (8) with axial interval between input shaft (1), output shaft (10), clutch (3), planet carrier (4) or stopper (6) is greater than zero, and stopper (6) are installed on planet carrier (4).

3. A dual internal-gear two-gear transmission mechanism according to claim 2, wherein: the rolling bearing is a deep groove ball bearing.

4. A dual internal-gear two-gear transmission mechanism according to claim 2, wherein: the axial eccentricity between the gear ring (8) and the input shaft (1), the output shaft (10), the clutch (3), the planet carrier (4) or the brake (6) is determined by the transmission ratio between the input shaft (1) and the output shaft (10).

5. A dual internal-gear two-gear transmission mechanism according to claim 2, wherein: the clutch (3) is connected with the brake (6) through a friction plate.

6. A dual internal-gear two-gear transmission mechanism according to claim 1, wherein: the input shaft (1), the sun gear (7), the gear ring (9) and the output shaft (10) are all coaxially arranged, and the axial distance between the gear ring (8) and the input shaft (1), the sun gear (7), the gear ring (9) or the output shaft (10) is larger than zero.

7. A dual internal-gear two-gear transmission mechanism according to claim 6, wherein: the axial eccentricity between the gear ring (8) and the input shaft (1), the sun gear (7), the gear ring (9) or the output shaft (10) is determined by the transmission ratio between the input shaft (1) and the output shaft (10).

8. A dual internal-gear two-gear transmission mechanism according to claim 1, wherein: the gear ring (9) is an inner gear ring with gear teeth arranged on the inner circumferential surface.

Technical Field

The invention belongs to the technical field of speed change mechanisms, and particularly relates to a double-inner-meshing two-gear speed change mechanism.

Background

At present, the speed change mechanism is widely applied to various vehicles and machine tools, the speed change mechanism enables important parts in the mechanical equipment, along with the development of technology, the speed change gear of the existing speed change mechanism is more and more, however, the existing speed change mechanism is mostly composed of an involute cylindrical gear transmission mechanism, and according to the difference of the composition structure of the speed change mechanism, the speed change mechanism can be divided into a fixed shaft type speed change mechanism and a planetary row type speed change mechanism, wherein the fixed shaft type speed change mechanism has larger volume, the involute cylindrical gear transmission mechanism used in the speed change mechanism has larger mass, the fixed shaft type speed change mechanism also has larger overall mass, the planetary row type speed change mechanism has compact structure, smaller volume and mass, larger adjustable range of transmission ratio and wider application, however, because the requirement of the involute cylindrical gear transmission mechanism on manufacturing precision and assembling precision is higher, the number of adopted gears is larger, the meshing connection among a plurality of gears is complicated, the assembly difficulty of axial positioning and radial centering of the gears is very high, the contact ratio in gear transmission is low, the load is low, the impact resistance is low, and the running efficiency of the speed change mechanism is influenced.

Disclosure of Invention

In order to solve the technical problem, the invention provides a double-inner-engagement two-gear speed change mechanism.

The invention is realized by the following technical scheme.

The invention provides a double-internal-engagement two-gear speed change mechanism which comprises an input shaft, an output shaft, a sun gear, a gear ring and a gear ring, wherein the sun gear is installed on the input shaft through a spline, the gear ring is installed on the output shaft through a spline, internal teeth are arranged on the inner circumferential surface of the gear ring, external teeth are arranged on the outer circumferential surface of the gear ring, the sun gear is meshed with the internal teeth of the gear ring, the gear ring is meshed with the external teeth of the gear ring, and tooth profiles of the internal teeth and the external teeth of the gear ring are cycloids.

The double-inner-meshing two-gear speed change mechanism further comprises a clutch, a brake and a planet carrier, the clutch is installed on the input shaft through a spline, the planet carrier is installed on the input shaft through a rolling bearing, a gear ring is installed on the planet carrier through the rolling bearing, the input shaft, the output shaft and the clutch, the planet carrier and the brake are all coaxially arranged, the gear ring is larger than zero in axial distance among the input shaft, the output shaft, the clutch, the planet carrier or the brake, and the brake is installed on the planet carrier.

The rolling bearing is a deep groove ball bearing.

The axial eccentricity between the ring gear and the input shaft, output shaft, clutch, planet carrier or brake is determined by the transmission ratio between the input shaft and the output shaft.

The clutch is connected with the brake through a friction plate.

The input shaft, the sun gear, the gear ring and the output shaft are all coaxially arranged, and the axial distance between the gear ring and the input shaft, the sun gear, the gear ring or the output shaft is larger than zero.

The axial eccentricity between the ring gear and the input shaft, sun gear, ring gear or output shaft is determined by the transmission ratio between the input shaft and the output shaft.

The gear ring is an inner gear ring with gear teeth arranged on the inner circumferential surface.

The invention has the beneficial effects that: by adopting the technical scheme of the invention, when the clutch and the brake are not engaged, the gear is neutral, when the clutch is engaged, the input shaft, the clutch, the planet carrier and the sun gear rotate at the same angular speed, the ring gear and the output shaft also rotate together at the same angular speed, the planet row integrally rotates, the transmission ratio between the input shaft and the output shaft is 1, namely, the gear is one, when the clutch is released and the brake is engaged, because the planet carrier is fixed, the input shaft drives the sun gear to rotate at the same angular speed, the sun gear is meshed with the inner teeth of the ring gear, the sun gear and the ring gear rotate in phase, the inner teeth of the ring gear drive the inner teeth ring to rotate at the same phase at a lower speed, and the ring gear drives the output shaft to rotate in phase, namely, the gear is 2-gear, the invention adopts the ring gears of which the inner and outer peripheral surfaces are respectively provided with the cycloid gear teeth to replace the existing involute planet gear, the contact ratio of the gear transmission mechanism is improved, the sliding rate of the cycloidal gear transmission mechanism is low and constant, the transmission is more stable, the shock and vibration resistance is stronger, meanwhile, the output torque of the cycloidal gear is larger under the condition that the appearance geometric dimension is smaller, the structure of the whole speed change mechanism is more compact, the size is smaller, the whole weight is correspondingly reduced, in addition, the requirements of the cycloidal gear on the machining and manufacturing precision and the assembling precision are lower, the assembling difficulty is reduced, and the large-scale batch assembly production is facilitated.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1-input shaft, 3-clutch, 4-planet carrier, 6-brake, 7-sun gear, 8-ring gear, 9-gear ring, and 10-output shaft.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

As shown in fig. 1, the present invention provides a double internal-engagement two-gear transmission mechanism, which includes an input shaft 1, an output shaft 10, a sun gear 7, a ring gear 8 and a ring gear 9, wherein the sun gear 7 is mounted on the input shaft 1 by using a spline, the ring gear 9 is mounted on the output shaft 10 by using a spline, inner teeth are provided on an inner circumferential surface of the ring gear 8, outer teeth are provided on an outer circumferential surface of the ring gear 8, the sun gear 7 is engaged with the inner teeth of the ring gear 8, the ring gear 9 is engaged with the outer teeth of the ring gear 8, and tooth profiles of the inner teeth and the outer teeth of the ring gear 8 are cycloids.

Further, two internal-gearing two-gear speed change mechanism still includes clutch 3, stopper 6 and planet carrier 4, and clutch 3 installs on input shaft 1 through using the spline, and planet carrier 4 installs on input shaft 1 through using antifriction bearing, and ring gear 8 installs on planet carrier 4 through using antifriction bearing, and input shaft 1, output shaft 10 and clutch 3, planet carrier 4, stopper 6 all arrange coaxially, and the axial interval between ring gear 8 and input shaft 1, output shaft 10, clutch 3, planet carrier 4 or stopper 6 is greater than zero, and stopper 6 installs on planet carrier 4.

In addition, the rolling bearing is preferably a deep groove ball bearing. The axial eccentricity between the ring gear 8 and the input shaft 1, output shaft 10, clutch 3, planet carrier 4 or brake 6 is determined by the transmission ratio between the input shaft 1 and the output shaft 10. The clutch 3 and the brake 6 are connected by friction plates.

Furthermore, the input shaft 1, the sun gear 7, the ring gear 9 and the output shaft 10 are all arranged coaxially, and the axial distance between the ring gear 8 and the input shaft 1, the sun gear 7, the ring gear 9 or the output shaft 10 is greater than zero. The axial eccentricity between the toothed ring 8 and the input shaft 1, the sun gear 7, the toothed ring 9 or the output shaft 10 is determined by the transmission ratio between the input shaft 1 and the output shaft 10. The ring gear 9 is an inner ring gear having gear teeth provided on an inner peripheral surface thereof.

By adopting the technical scheme of the invention, when the clutch and the brake are not engaged, the gear is neutral, when the clutch is engaged, the input shaft, the clutch, the planet carrier and the sun gear rotate at the same angular speed, the ring gear and the output shaft also rotate together at the same angular speed, the planet row integrally rotates, the transmission ratio between the input shaft and the output shaft is 1, namely, the gear is one, when the clutch is released and the brake is engaged, because the planet carrier is fixed, the input shaft drives the sun gear to rotate at the same angular speed, the sun gear is meshed with the inner teeth of the ring gear, the sun gear and the ring gear rotate in phase, the inner teeth of the ring gear drive the inner teeth ring to rotate at the same phase at a lower speed, and the ring gear drives the output shaft to rotate in phase, namely, the gear is 2-gear, the invention adopts the ring gears of which the inner and outer peripheral surfaces are respectively provided with the cycloid gear teeth to replace the existing involute planet gear, the contact ratio of the gear transmission mechanism is improved, the sliding rate of the cycloidal gear transmission mechanism is low and constant, the transmission is more stable, the shock and vibration resistance is stronger, meanwhile, the output torque of the cycloidal gear is larger under the condition that the appearance geometric dimension is smaller, the structure of the whole speed change mechanism is more compact, the size is smaller, the whole weight is correspondingly reduced, in addition, the requirements of the cycloidal gear on the machining and manufacturing precision and the assembling precision are lower, the assembling difficulty is reduced, and the large-scale batch assembly production is facilitated.