CN216812730U

CN216812730U - Spiral speed changer

Info

Publication number: CN216812730U
Application number: CN202120850866.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-24
Filing date: 2021-04-24
Publication date: 2022-06-24
Anticipated expiration: 2031-04-24

Abstract

A spiral speed changer, an input sun gear and an output sun gear in a planetary gear train rotate concentrically and in the same direction, and a planet carrier rotates in a single direction in the same direction as the rotation direction of the sun gear; the right-handed main screw concentrically fixed on the gear ring is meshed with the left-handed auxiliary screw fixed on the shell and smaller than the main screw in diameter, the motor is driven by the automatic control device to drive the auxiliary screw to rotate, the rotating speed of the main screw which rotates actively is changed under the rotating speed change of the auxiliary screw, so that the reverse rotation of the gear ring is gradually changed from high speed to static, and the circumferential rotation of the planetary gear and the rotation of the output sun gear are gradually changed. The transmission has the advantages of large torque bearing capacity, small speed change power consumption, high transmission efficiency, fast output response, high mechanical strength, good impact resistance, few and simple parts and good product durability, and can be applied to transmission speed change of various large, medium and small automobiles.

Description

Spiral speed changer

Technical Field

The invention relates to an electric mechanical stepless speed change device capable of controlling large-torque synchronous rotation through small-torque synchronous rotation.

Background

The existing automobile transmission mostly adopts a planetary gear train matched with a friction clutch or a hydraulic torque converter to transform the transmission ratio of a plurality of groups of gears to realize the speed change, so that the problem of power transmission efficiency reduction caused by large ratio steps is generally solved, and the defects of high mechanical friction strength, low product durability, small torque bearing capacity, output response lag and the like of a hydraulic coupling device in the aspect of transmission output are generally caused by a plurality of parts and complexity. The invention provides a spiral transmission for overcoming the defects of the existing automobile transmission, and the spiral transmission has the advantages of stepless speed change, high transmission efficiency, small mechanical friction strength, few and simple parts, high product durability, large torque bearing capacity and quick output response.

Disclosure of Invention

The technical scheme adopted by the invention for solving the technical problem is as follows: the sun gear comprises a big planetary gear meshed with an input sun gear, a small planetary gear concentrically integrated with the big planetary gear and meshed with an output sun gear, a gear ring meshed with the big planetary gear, a non-return device fixed on a shell, a planet carrier, a coupling device and an electric drive control device, wherein the non-return device locks the non-return device, and the rotation direction of the planet carrier is consistent with that of the input sun gear: the coupling device is an electric spiral clutch device consisting of a left-handed main screw rod which is fixed on the gear ring and rotates concentrically with the gear ring, a right-handed auxiliary screw rod which is meshed with the left-handed main screw rod, is fixed in the shell of the transmission and rotates in a coupling way with the actuating motor, and a support; the electric drive control device is an electric drive control system which is electrically connected with the execution motor, the sensor and the power supply, so that the execution motor drives the unidirectional rotating speed of the auxiliary screw rod relative to the main screw rod to automatically change under the drive of a program. The spiral rotation of a main screw rod in the electric spiral separation device generates an active axial action, and the spiral relative rotation of an auxiliary screw rod is axial abdication rotation; the tooth surfaces of the main screw and the auxiliary screw rotate respectively without friction in a meshing gap under the mutually matched rotating speed state, and the rotating speed change of the auxiliary screw causes the contact frequency of the spiral tooth surface of the auxiliary screw and the spiral tooth surface of the main screw to change, so that the frequency of the axial mechanical action of the interaction of the auxiliary screw and the spiral tooth surface of the main screw changes. When the input sun gear rotates at a high speed to drive the big planetary gear and the small planetary gear drives the output sun gear to perform speed reduction transmission, the execution motor is electrified to drive the auxiliary screw rod to rotate at a relative rotating speed matched with the reverse rotation of the main screw rod driven by the gear ring, so as to form the resistance-free reverse rotation of the gear ring; when the execution motor drives the auxiliary screw rod to rotate and generate gradual change from high speed to static, the rotating speeds of the main screw rod and the gear ring are gradually changed, so that the circumferential rotation of the big planetary gear is gradually changed from static to high speed, and the rotating speed of the output sun gear meshed with the small planetary gear is changed from low to high.

The invention has the beneficial effects that: the transmission has the advantages of large torque bearing capacity, small speed change power consumption, high transmission efficiency, quick output response, high mechanical strength, good impact resistance, few and simple parts, good product durability and can be applied to transmission speed change of various large, medium and small automobiles.

Drawings

The technical scheme is further explained with the accompanying drawings.

Fig. 1 is a plan view of a main body of a helical transmission.

In the attached drawing, 1 is an actuating motor, 2 is a main screw rod, 3 is a gear ring, 4 is a backstop, 5 is a planet carrier, 6 is an output sun gear, 7 is an auxiliary screw rod, 8 is a big planetary gear, 9 is an input sun gear, 10 is a small planetary gear, 11 is a shell, and 12 is a reverse gear device.

Detailed Description

An input sun gear (9) is meshed with a large planet gear (8), a small planet gear (10) which is concentric with the large planet gear is meshed with an output sun gear (6), the output sun gear is in transmission connection with a reverse gear device (12), and the large planet gear is meshed with a gear ring (3). A backstop (4) fixed on the shell (11) reversely locks the planet carrier (5) to enable the rotation direction of the planet carrier to be consistent with the rotation direction of the input sun gear (9). A main screw (2) which is fixed on the gear ring (3) and rotates concentrically with the gear ring is engaged with an auxiliary screw (7) in left and right rotating directions, and the auxiliary screw is fixed in a transmission shell (11), supported by a thrust bearing and the shell and coupled with an actuating motor (1) fixed on the shell to rotate. The main screw and the gear ring (3) are supported by a planet carrier (5), a shell and a thrust bearing. The execution motor (1) is electrically connected with the rotating speed sensor, the driving controller and the storage battery, so that the unidirectional rotating speed of the execution motor is changed under the instruction of a program. The main screw (2) is a driving wheel, and the auxiliary screw (7) is a driven wheel; the single rotation of the main screw rod causes the meshing clearance to disappear, so that the main screw rod is subjected to the action of axial mechanical force to generate rotation resistance, and the matched rotation of the auxiliary screw rod is the abdication for generating the meshing clearance. The main screw rod and the auxiliary screw rod are meshed with the spiral tooth surfaces of the circular tangent surfaces, and the mechanical friction generated by the main screw rod and the auxiliary screw rod is tangential static friction instead of radial mechanical transmission friction, so that the rotating radius of the auxiliary screw rod (7) can be smaller than that of the main screw rod (2) to reduce the passive torque formed by partial radial acting force on the auxiliary screw rod and adapt to an actuating motor with smaller power. The rotation speed of the main screw and the auxiliary screw which are matched with each other can form frictionless respective rotation of which the tooth surfaces of the main screw and the auxiliary screw generate a meshing gap; when the rotation speed of the auxiliary screw rod (7) changes, the frequency of the contact between the spiral tooth surface of the auxiliary screw rod and the spiral tooth surface of the main screw rod (2) changes, the frequency of the axial mechanical reaction generated when the main screw rod is contacted with the tooth surface of the main screw rod changes, and the rotation resistance of the main screw rod changes. When the input sun gear (9) rotates at a high speed to drive the big planetary gear (8) and the small planetary gear (10) drives the output sun gear (6) to perform speed reduction transmission, the executive motor (1) is electrified to drive the auxiliary screw (7) to rotate at a reverse rotating speed matched with the reverse rotating speed of the main screw (2) driven by the gear ring (3), so that resistance-free reverse high-speed rotation of the gear ring is formed; when the rotating speed of the auxiliary screw rod driven by the execution motor (1) is gradually changed from high to low, the rotating speeds of the main screw rod and the gear ring are gradually changed, so that the circumferential rotation of the large planetary gear (8) is gradually changed from static to high, and the rotating speed of the output sun gear (6) meshed with the small planetary gear (10) is changed from low to high.

Claims

1. A spiral speed changer comprises a big planetary gear meshed with an input sun gear, a small planetary gear concentrically integrated with the big planetary gear and meshed with an output sun gear, a gear ring meshed with the big planetary gear, a planet carrier, a coupling device and an electric drive control device, wherein the planet carrier is locked by a non-return device fixed on a shell, and the rotation direction of the planet carrier is consistent with the rotation direction of the input sun gear, and the coupling device and the electric drive control device are characterized in that: the coupling device is an electric spiral clutch device consisting of a left-handed main screw rod which is fixed on the gear ring and rotates concentrically with the gear ring, a right-handed auxiliary screw rod which is meshed with the left-handed main screw rod, is fixed in the shell of the transmission and rotates in a coupling way with the actuating motor, and a support; the electric drive control device is an electric drive control system which is electrically connected with an execution motor, a sensor and a power supply so that the execution motor drives the unidirectional rotating speed of the auxiliary screw rod relative to the main screw rod to rotate to automatically change under the drive of a program.

2. A spiral transmission as claimed in claim 1, wherein: the rotation radius of the auxiliary screw rod (7) is smaller than that of the main screw rod (2).