CN216306622U - Planetary oblique axis bevel gear stepless speed changer - Google Patents

Abstract

The utility model provides a planet skew axis conical gear buncher, the big ratio reduction gearing of the first grade of this derailleur, second grade skew axis planet is accomplished in a set of train, the circumferential radius of rotation of big planetary gear has been eliminated, lead to increasing its speed reduction ratio and increase big planet conical gear's turnover rotational speed, then increase its gear ratio again, can promote the space that increases the gear module again when reducing the derailleur volume by a wide margin, then form the big moment of torsion load of derailleur, current automobile transmission volume with the configuration is littleer, weight is lighter, transmission efficiency is higher, spare part is still less, product durability is better, manufacturing cost is lower, make the car can save more fuel or electric energy, wide application in fields such as car and industrial rotation.

Description

Planetary oblique axis bevel gear stepless speed changer

Technical Field

The utility model relates to a planetary gear train skew axis bevel gear stepless speed changer.

Background

The planetary gear speed reducing or changing device has been widely used in the automobile speed changer because of its good mechanical property and excellent transmission efficiency, however, it is known that the larger the reduction ratio and output torque between gears in the engaged transmission, the larger the module and tooth ratio of the gears, the larger the logarithm and volume and weight of the gears, especially the current planetary gear train structure in which the gears are engaged with parallel shafts, if the output speed ratio and output torque are increased by one time, the double increase of the rotation radius of the planetary gear or the double increase of the planetary gear set mechanism and gear logarithm and the module and gear width, thus the double increase of the volume and weight of the speed changer, thereby greatly reducing the transmission efficiency of the speed changer, increasing the fuel consumption of the automobile, and simultaneously the double increase of the material and production of the speed changer because of the increase of the parts, the transmission is not suitable for the configuration requirements of future automobiles on high-multiple speed ratio and high-multiple output torque of the transmission, high transmission efficiency, small volume, light weight, high mechanical strength and good durability. In order to enable the automobile transmission to output larger torque, generate higher speed ratio without increasing more weight and larger volume, reduce the application of parts, improve the transmission efficiency, reduce the manufacturing cost and adapt to the higher configuration requirement of the automobile on the transmission in the future, the utility model provides the planetary skew shaft conical gear stepless transmission. Compared with the existing automobile transmission with the same configuration, the transmission has the advantages of smaller volume, lighter weight, higher transmission efficiency and fewer parts.

Disclosure of Invention

The technical scheme adopted by the utility model for solving the technical problems is as follows: the transmission comprises a transmission shell, a planetary gear, a planet carrier, an input gear, an output gear, a gear ring, a hydraulic pump, an electric control valve and an electric drive control device, wherein the input gear is a central input bevel gear shaft which is in transmission connection with a power output shaft and has an axial angle smaller than 90 degrees; the gear ring is a speed-increasing bevel gear which rotates concentrically with the central input bevel gear shaft, the shaft angle is greater than 90 degrees, and the number of teeth is greater than that of the central input bevel gear shaft; the planet gear is a big planet bevel gear of which the tooth number is larger than that of the central input bevel gear shaft, the planet gear is meshed with the central input bevel gear shaft gear and the speed-up bevel gear simultaneously to rotate, and the back of the planet gear is concentrically fixed with a small planet bevel gear shaft of which the tooth number is smaller than that of the speed-up bevel gear; the output gear is an output conical shaft gear, the end shaft of which is supported by the shell and is in transmission connection with the reverse gear mechanism, rotates concentrically with the central input conical gear shaft, has the tooth number larger than that of the pinion planetary conical gear shaft and is meshed with the pinion planetary conical gear shaft gear; the planet carrier is a combined planet carrier which supports the central input conical gear shaft, the large planet conical gear, the output conical gear shaft and the speed-increasing conical gear to rotate, is supported by the shell, is reversely locked by a non-return device fixed in the shell and rotates concentrically with the central input conical gear shaft in the same direction; the hydraulic pump and the electric control valve are damping pumps which are fixed in the shell, are linked with the speed-increasing conical gear, and increase or decrease the circulation flow of the internal liquid oil under the control of the electric valve so as to gradually change the rotation resistance of the hydraulic pump and the electric control valve. The large planetary bevel gear, the central input bevel gear shaft gear and the speed-increasing bevel gear are meshed and rotated simultaneously, the output bevel gear shaft gear and the small planetary bevel gear shaft gear are meshed and rotated to form a first-stage and a second-stage skew-axis planetary speed reduction transmission, and the first-stage and second-stage skew-axis planetary speed reduction transmission is completed in one gear train, so that the circumferential rotation radius of the large planetary bevel gear is reduced, the speed reduction ratio is increased, the revolving speed of the large planetary bevel gear is increased, and the speed change ratio of the large planetary bevel gear is increased.

The utility model has the beneficial effects that: the planetary reduction transmission of the bevel gear with the oblique crossing shaft eliminates the circumferential rotating radius of the large planetary gear, so that the reduction ratio is increased, the turnover rotating speed of the large planetary bevel gear is increased, the gear ratio is increased, and the outer diameter of the transmission is greatly reduced.

Drawings

The technical scheme is further explained with the accompanying drawings.

FIG. 1 is a front view of a planetary skew bevel gear continuously variable transmission.

Fig. 2 is a view of the wire planer of fig. 1A-a.

FIG. 3 is a view of the planer of FIGS. 1B-B.

In the attached drawing, 1, an external transmission gear disc, 2, a rotary valve, 3, a servo motor, 4, a plunger pump push rod, 5, an axial swing disc, 6, an axial cam, 7, a wedge-type backstop, 8, a combined planet carrier, 9, a pinion cone gear shaft, 10, an output cone gear shaft, 11, a central input cone gear shaft, 12, a large planet cone gear, 13, an incremental cone gear and 14, a transmission shell.

Detailed Description

The central input bevel gear shaft (11) with the shaft angle smaller than 90 degrees is supported by the inner edge of the hollow shaft of the combined planet carrier (8), and the shaft end of the central input bevel gear shaft is in transmission connection with the power output shaft. The speed-increasing bevel gear (13) with the shaft angle larger than 90 degrees and the tooth number 4 times that of the central input bevel gear shaft is supported by the outer edge of the hollow shaft of the combined planet carrier (8) and rotates concentrically with the central input bevel gear shaft (11). The number of teeth of a big planetary bevel gear (12) supported by the conical cylinder of the combined planet carrier is equal to that of the speed-increasing bevel gear, and the big planetary bevel gear and the speed-increasing bevel gear are meshed with a gear of a central input bevel gear shaft (11) and a gear of a speed-increasing bevel gear (13) to rotate simultaneously to form primary skew shaft speed reduction transmission (figure 3). The back of the big planetary bevel gear (12) is concentrically fixed with a small planetary bevel gear shaft (9) with the same number of teeth as the central input bevel gear shaft (11), the small planetary bevel gear shaft rotates concentrically with the central input bevel gear shaft (11), the number of teeth is 5 times of that of the small planetary bevel gear shaft, and the small planetary bevel gear shaft is supported by a combined planet carrier bevel end shaft and a transmission shell (14), and the shaft end is in gear engagement with an output bevel gear shaft (10) in transmission connection with a reverse gear mechanism to form secondary skew shaft speed reduction transmission (figure 3). Because the combined planet carrier (8) is reversely locked by the wedge-type backstop (7) and can only rotate in the same direction as the central input conical gear shaft, when an oil way valve of an axial plunger pump fixed in a transmission shell is in an open state and the central input conical gear shaft (11) rotates at a high speed, the output conical gear shaft (10) outputs 20 times of large torque and performs speed reduction transmission in the same direction as the direction of rotation of the central input conical gear shaft (11), and the speed-up conical gear (13) performs no-load rotation in the opposite direction to the direction of rotation of the central input conical gear shaft (11); when a servo motor (3) fixed on a transmission shell (14) drives an external transmission gear disc (1) and an internal planetary gear mechanism drives a plurality of rotary valves (2) in a plunger pump to rotate, the circulation flow of liquid oil in the plunger pump is gradually changed from large to small, so that the resistance of the axial cam (6) fixed on the back side of a speed-increasing conical gear (13) to push an axial swinging disc (5) and a plunger pump push rod (4) to move is gradually changed from small to large, the reverse rotating speed of the speed-increasing conical gear (13) is gradually changed from high to bottom, and the large planetary conical gear (12) is gradually changed from static to high in circumferential rotation, so that the small planetary conical gear shaft (9) drives an output conical gear shaft (10) to gradually change from low to high. The primary and secondary diagonal shaft speed reducing transmission structures subtract the circumferential rotation radius of the large planetary bevel gear, so that the speed reducing ratio is increased, the revolving speed of the large planetary bevel gear is increased, and the speed change ratio of the large planetary bevel gear is increased.

Claims (1)

1. A planetary skew bevel gear continuously variable transmission comprises a transmission shell, a planetary gear, a planet carrier, an input gear, an output gear, a gear ring, a hydraulic pump, an electric control valve and an electric drive control device, and is characterized in that: the input gear is a central input conical gear shaft which is in transmission connection with the power output shaft and has an axial angle smaller than 90 degrees; the gear ring is a speed-increasing bevel gear which rotates concentrically with the central input bevel gear shaft, the shaft angle is greater than 90 degrees, and the number of teeth is greater than that of the central input bevel gear shaft; the planet gear is a big planet bevel gear of which the tooth number is larger than that of the central input bevel gear shaft, the planet gear is meshed with the central input bevel gear shaft gear and the speed-up bevel gear simultaneously to rotate, and the back of the planet gear is concentrically fixed with a small planet bevel gear shaft of which the tooth number is smaller than that of the speed-up bevel gear; the output gear is an output conical shaft gear, the end shaft of which is supported by the shell and is in transmission connection with the reverse gear mechanism, rotates concentrically with the central input conical gear shaft, has the tooth number larger than that of the pinion planetary conical gear shaft and is meshed with the pinion planetary conical gear shaft gear; the planet carrier is a combined planet carrier which supports the central input conical gear shaft, the large planet conical gear, the output conical gear shaft and the speed-increasing conical gear to rotate, is supported by the shell, is reversely locked by a non-return device fixed in the shell and rotates concentrically with the central input conical gear shaft in the same direction; the hydraulic pump and the electric control valve are damping pumps which are fixed in the shell, are linked with the speed-increasing conical gear, and increase or decrease the circulation flow of the internal liquid oil under the control of the electric valve so as to gradually change the rotation resistance of the hydraulic pump and the electric control valve.

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