CN101280838B - Complete mechanical automatic stepless speed-changing device - Google Patents

Abstract

The invention relates to a fully mechanical variable torque and an automatic continuously variable transmission device and is particularly applicable to the vehicles with automatic transmission. The function of the device includes that the input torsion torque and the speed are adjusted for self adaptation by the input rotation speed and the external resistance torque to realize the automatic continuously variable transmission and the simple structure of the device. The invention comprises a sun gear 1, two or more planet gears 2, a framework 3, etc.; the power is inputted from the sun gear 1 and outputted from the framework 3; one end of a planet gear shaft 4 is fixedly connected with the planet gears 2 and the other end of the planet gear shaft 4 runs through the framework 3 and is connected with and drives a rotor 5; the rotor generates centrifugal force on the framework when rotating in an eccentric rail and overcomes the external resistance force to push the framework to rotate, thus realizing the variable transmission.

Description

A kind of complete mechanical automatic stepless speed-changing device

Technical field

The present invention is about a kind of fully-machinery type bending moment and automatic stepless speed-changing device, and its output torque and speed are adjusted by input speed and external drag square self adaption, belong to mechanical transmission fields.

Background technique

Surface car of a great variety, purposes, purpose and service condition are different.For satisfy the transmission device of Vehicle Driving Cycle needs in order to transform the power plant performance, require both high and many.General type is the stationary axle gear type, more complicated hydraulic automatic speed change gear as planetary gear type etc.Complete planetary mechanism is to be made of sun gear, gear ring, three elements of planet wheel framework, and wherein a speed is a timing, and other speed of two can freely change according to certain rules.Control one of them speed with operating mechanism, another speed is just certain, namely reduces one degree of freedom with operating mechanism, just can obtain the motion of stable drive ratio really of another degrees of freedom.Therefore, planetary mechanism is a kind of differential mechanism of stable drive ratio.In order to obtain larger velocity ratio to satisfy the requirement of travelling of vehicle, planetary driving device has adopted many groups planet row and some control mechanisms (clutch, break) and complicated Effector.Thereby cause the gear structure of vehicle and handle complexity, volume weight is large, the manufacturing difficulty, and cost is high; And then cause the increase of vehicle dimension weight, affect performance and the cost of car load.

The objective of the invention is to explore a kind of simple in structure, dimensional weight is little, cost is low novel fully-machinery type automatic stepless speed-changing device.

This method is to realize on epicyclic gear train.Drive mechanism only has sun gear, planetary pinion and framework, and sun gear is connected with power source, is active part; Planetary pinion, framework are passive part.As not adopting new structure and principle, the planetary pinion in this structure is in free state, certainly transfers inconsiderate turning with stable drive ratio with sun gear, and the planetary pinion framework remains static, and can't be exported by the power of sun gear input.

Summary of the invention

Principle relevant with dynamics according to kinology will produce centrifugal force when an object is done curvilinear motion, its size is the function of the quality of object mass center angular velocity square, radius of curvature and particle.This method and device are namely according to this principle, in planet wheel shaft one end connect one relatively axle make the rotor of radial motion, in planetary pinion framework relevant position, specific inner curve track is set, the inner curve track center departs from respect to the planetary pinion axle center, and offset direction is on the output sense of rotation of wishing.Therefore planet pin, rotor and inner curve track have consisted of the rotational structure of an outer bias, interior guiding, make the two ends of rotor length direction alternately contact with track and guarantee that barycenter is in a side of framework expectation sense of rotation.When the planet gear drives rotor rotates, due to rotor centroid and planet pin existence bias, by the centrifugal action that rotates generation in orbit, track also produces constraint to rotor simultaneously, make rotor do radial motion according to the rule of setting in rotation, cause apex rotor to the change of the distance of planet pin along with rotor angle changes, guarantee that one week of rotor completing secondary effectively does work, and improves transmission efficiency.

When the centrifugal force that increases to generation when the rotating speed of rotor is enough to overcome outer load on the planetary pinion framework, namely reaches and promote the purpose that the planetary pinion framework rotates output power.The rotating speed of rotor is higher, and the centrifugal force of generation is larger, and the planetary pinion frame stressing is larger, if it is constant to load outward, its rotational velocity is just higher, and namely the rotating speed of sun gear changes the speed change that can cause the planetary pinion framework.Constant in rotor speed, in the constant situation of the power on the planetary pinion framework of namely acting on, outer load changes, and the rotating speed of planetary pinion framework also changes thereupon.Size and structure at device are not done in the change situation, get boundary dimension by density or the change rotor of adjusting rotor material, change the quality of rotor, can change the power of transmission.Therefore, can realize stepless change with the method design transmission device.

Introduce in detail structure of the present invention and working principle below in conjunction with accompanying drawing.

Fig. 1 is principle front schematic view of the present invention, and Fig. 2 is the principle side schematic view.The present invention includes 1,2 of a sun gear or 2 with upper planetary gear 2 and framework 3 etc., the corresponding planet pin 4 of each planetary pinion and a rotor 5.Power is by sun gear 1 input, by framework 3 outputs.Planet pin 4 one ends and planetary pinion 2 fixedly link, the other end passes framework 3 and links with rotor 5 and drive rotor 5, planet pin 4 can be connected by bearing with framework 3, also gear connects, planet pin 4 is square type structure 6 with the end that rotor 5 links, rotor 5 also is rectangle with the hole 8 that planet pin 4 links, and the length of length direction is greater than the length of planet pin 4 rectangle joining ends, and assurance rotor 5 can be done radially relative movement and not interfere along rectangular opening 8 length directions and planet pin 4.Planetary pinion 2 evenly distributes on framework 3, and makes rotor 5 be in corresponding phase place by the rectangle connection of planet pin 4.Framework 3 is provided with inner curve eccentric orbit 7, the center of eccentric orbit 7 is eccentric with respect to the center of planet pin 4, and the direction of eccentric direction for wishing that output is rotated, the diameter of eccentric orbit 7 is greater than rotor 5 length, guarantee that rotor 5 is in the interior running of eccentric orbit 7, and when the barycenter of rotor 5 and planet pin 4 center superposition, rotor 5 two ends contact with eccentric orbit, other the time one end of rotor 5 and eccentric orbit 7 depart from section and keep in touch, and the other end of rotor 5 and eccentric orbit 7 break away near section, but and smooth conversion.Under eccentric orbit 7 actings in conjunction on planet pin 4 and planetary frame 3, rotor 5 is done with planet gear 2 and is rotated the compound motion that moves radially with relative planet pin 4.When rotating, sun gear 1 drives planetary pinion 2 rotations, do with planet gear 2 by planet pin 4 rotor drivens 5 and rotate and the compound motion that radially moves relative to planetary pinion 4 axles, because rotor 5 eccentric rotaries produce centrifugal force, overcome on framework 3 and to promote framework 3 rotation output speeds after resistance, reach the speed change purpose.

Compare with existing drive technology, technological scheme of the present invention has following advantage: simple in structure, dimensional weight is little, has reduced the manufacture cost of device, and manufacturing is not high to equipment requirement, and then improves the performance of car load and reduce integral vehicle cost; Do not need complicated manipulation to control, easy for operation.

Description of drawings

Fig. 1 is principle front schematic view of the present invention.

Fig. 2 is principle of the invention side schematic view.

Embodiment

The present invention is applied in automatic transimission, power and sun gear input end link, sun gear rotates and drives the planet wheel rotation when dynamic input, planet wheel rotates by the planet wheel shaft rotor driven, rotor is changed the line of production living centrifugal action on framework in the eccentric orbit inward turning, when acting on framework resistance, framework begins to rotate when centrifugal force, and gimbal axis gets final product output speed.When input speed one regularly, act on framework resistance larger, output speed is less; When acting on resistance one timing on framework, input speed is larger, and output speed is also larger.Thereby realize self-adapting automatic gear shift.

Claims (1)

1. complete mechanical automatic stepless speed-changing device, by sun gear (1), planetary pinion (2), framework (3) forms, and dynamic action, is characterized in that by framework (3) output in sun gear (1) input:

Planet pin (4) one ends and planetary pinion (2) fixedly link, the other end passes framework (3) and rotor (5) and links and drive rotor (5), rotor (5) can radially move with planet pin (4), under eccentric orbit (7) acting in conjunction on planet pin (4) and planetary frame (3), rotor (5) is done with planet gear (2) and is rotated the compound motion that moves radially with relative planet pin (4);

Planet pin (4) is square type structure (6) with the end that rotor (5) links, the hole (8) that rotor (5) and planet pin (4) link also is rectangle, and in the length in rotor (5) the length direction hole length greater than the square type structure (6) of planet pin (4);

Framework (3) is provided with eccentric orbit (7), and the center of eccentric orbit (7) is eccentric with respect to the center of planet pin (4);

The diameter of eccentric orbit (7) is greater than the length of rotor (5);

There are 2 or 2 to be evenly distributed on framework (3) with upper planetary gear (2).

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