CN1151491A

CN1151491A - Tumbler input type steel ball buncher

Info

Publication number: CN1151491A
Application number: CN 95114255
Authority: CN
Inventors: 徐海涛; 徐琦; 胡莉妮
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-05
Filing date: 1995-12-05
Publication date: 1997-06-11

Abstract

A tumbler input type of planetary friction stepless speed variator is composed of disk-shaped tumbler, steel ball, driven conic wheel, fixed conic ring and internal ring. Input shaft drives serially disk-shaped tumbler, mandrel and steel ball to make steel ball do planetary movement, which rotates the driven conic wheel. The power is output through V-slot automatic presser and output shaft. Speed regulation mechanism makes outer ring of slide sleeve move axially to generate relative rotation between disk-shaped tumbler and curved sloted plate and further to regulate the inclination of mandrel, varying the speed.

Description

Tumbler input type steel ball buncher

The invention belongs to pivoted arm input type planetary friction stepless speed variator field.Be applicable to the power transmission under the various different occasions that need the range of infinitely variable speeds broadness.

(China Patent No.: ZL93213958.2) its drive characteristics is that initiatively cone pulley drives steel ball and does planetary motion to steel ball as the planetary steel ball stepless transmission device of planet wheel.Because the size of retainer and speed disk is restricted, and makes the inclination alpha of axle also be restricted, and causes slewing range to be restricted.Generally speaking, when input speed was 1500 rev/mins, the scope of output speed was-350 to+200 rev/mins.The speed governing part of this speed changer adopts gear differential attachment, mechanism's more complicated, manufacture cost height.Details are referring to planetary steel ball stepless transmission device (China Patent No.: ZL93213958.2).

In the planet awl drum type stepless speed variator (as shown in Figure 4), planet is bored the solid of rotation that drum (3) is made up of two sections different arc generatrixs of radius, is being with by pivoted arm (1) and is revolving round the sun.Under the rubbing action of retaining ring (4), produce rotation simultaneously and form planetary motion.Planet is bored drum (3) move axially, change the contact radius of planet awl drum (3), retaining ring (4) and driven torus (2), thereby change output speed, and can obtain very broad slewing range.When input speed was 1500 rev/mins, output speed was-1250 to+375 rev/mins.This speed changer does not have automatic pressurization device, and the impacting force between planet awl drum, retaining ring and the driven torus three is that the centrifugal force that produces when relying on the revolution of planet awl drum provides.When input speed improved, the output torque increased.Reduce the life-span but input speed too high meeting causing point of contact positive pressure is excessive.Simultaneously, when non-loaded or underload running, impacting force is excessive relatively, substantially exceeds the required numerical value of frictional force.In addition, the manufacturing difficulty of the planet awl drum in this speed changer, the integral shaft of speed changer is to longer dimension.About structure with calculate and to edit: " mechanical stepless transmission " China Machine Press nineteen eighty-three referring to Ruan Zhongtang.

The objective of the invention is to do planetary motion with steel ball, the mode of dish type pivoted arm input realizes broad slewing range, and has certain constant output characteristic and simple speed regulating mechanism.

The object of the present invention is achieved like this:

As shown in Figure 1, a plurality of steel balls (9) are arranged in the speed changer, bearing and axle (10) are housed in the steel ball.Axle (10) two ends are contained in the radially straight trough of dish type pivoted arm (7), (14), and dish type pivoted arm (7), (14) are integral with screw attachment.Input shaft (1) links with key with dish type pivoted arm (7), (14), input shaft (1) drives dish type pivoted arm (7), rotate (14), and drive steel ball (9) by the axle (10) in the radially straight trough that is inserted in dish type pivoted arm (7), (14) and revolve round the sun, promptly around importing rotational.Fixedly conical ring (8) is fixed in the casing (19).Under the rubbing action of fixing conical ring (8), steel ball (9) produces rotation again in revolution.Driven cone pulley (11) with the rotation of steel ball (9) and revolution motion synthetic after, output power by output shaft (13) through pressurizer (12) automatically.Interior ring (15) sky is enclosed within on the input shaft (1), rotates with steel ball (9), plays supporting steel ball (9).Change the inclination alpha of axle (10), make the steel ball (9) and the fixing rotating speed of the change can the change of the contact radius between conical ring (8) and the driven conical ring (11) output shaft.

As shown in Figure 2, the crank slot plate has curvilinear groove on (16), and an end of axle (10) is inserted in the curvilinear groove, utilizes curvilinear groove (being equivalent to cam) to control the inclination alpha of axle (10).On the hollow sleeve of crank slot plate (16), have a skewed slot, the center line of skewed slot and the axis β that has angle.The hollow sleeve upper edge axial direction of dish type pivoted arm (7) has been opened a straight trough, promptly axial straight trough (as shown in Figure 3).Crank slot plate (16) is enclosed within on the dish type pivoted arm (7), is Spielpassung between them, can relatively rotate, but can not move to axial.Spring collar (20) is stuck on the dish type pivoted arm (7), and its effect is to prevent to produce between them to move to axial.

During speed governing, rotary worm (4) rotates worm gear (3) and driven gear (5) rotates, and makes tooth bar (2) move axially along the axis that is parallel to input shaft (1).Tooth bar (2) is fixed on the sliding sleeve outer ring (17).Sliding sleeve outer ring (17) also moves axially under the drive of tooth bar (2), but can not rotate.Between sliding sleeve outer ring (17) and the sliding sleeve inner ring (18) bearing is housed, sliding sleeve inner ring (18) also moves axially with sliding sleeve outer ring (17).Sliding sleeve inner ring (18) rotates with crank slot plate (16) simultaneously.A straight pin (6) is housed on the sliding sleeve inner ring (18), and the skewed slot that straight pin (6) passes on the crank slot plate (16) inserts in the axial straight trough of dish type pivoted arm (7).Because moving axially of straight pin (6) forces between dish type pivoted arm (7) and the crank slot plate (16) to produce relative rotation.Under the effect of the curvilinear groove of crank slot plate (16), the inclination alpha of axle (10) changes, thereby has changed steel ball (9) and the fixing contact radius between conical ring (8) and the driven conical ring (11), and output speed is changed.

The effect that the present invention produced is as follows:

1. slewing range is big, if the sense of rotation of input shaft one regularly, the velocity ratio i=-1.3 of speed changer is to+0.25, and promptly when input speed was 1500 rev/mins, output speed was-2000 to+375 rev/mins;

2. at output terminal automatic pressurizer (12) is housed, can changes steel ball (9) and the fixing pressure between conical ring (8) and the driven conical ring (11) with the variation of load automatically, and when the slow-speed of revolution is exported, can obtain bigger torque;

3. arrangements for speed regulation are simple and reliable, and manufacturing is easy.

Claims

1. tumbler input type steel ball buncher, it is characterized in that: input shaft (1) links with key with dish type pivoted arm (7), (14), input shaft (1) drives dish type pivoted arm (7), rotate (14), driving steel ball (9) by axle (10) revolves round the sun, promptly around the rotational of input shaft (1), fixedly conical ring (8) is fixed in the casing, steel ball (9) is under the rubbing action of fixing conical ring (8), do simultaneously rotation again, driven cone pulley (11) is outputed power by output shaft (13) through automatic pressurizer (12) after the rotation of steel ball (9) is synthesized with revolution.

2. according to claim 1 described tumbler input type steel ball buncher, the feature of its speed regulating mechanism is: tooth bar (2) is fixed on the sliding sleeve outer ring (17), sliding sleeve outer ring (17) can not be rotated, between the sliding sleeve Internal and external cycle bearing is housed, sliding sleeve inner ring (18) is with dish type pivoted arm (7), crank slot plate (16) rotates together, a straight pin (6) is housed on the sliding sleeve inner ring (18), straight pin (6) passes the skewed slot on the crank slot plate (16), insert in the axial straight trough of dish type pivoted arm (7), under the drive of tooth bar (2), sliding sleeve outer ring (17), sliding sleeve inner ring (18) and straight pin (6) move axially together, force between dish type pivoted arm (7) and the crank slot plate (16) to produce relative rotation, thus the inclination alpha of change axle (10).

3. according to claim 2 described speed regulating mechanisms, it is characterized in that: have a skewed slot on the crank slot plate (16), the center line of skewed slot and the axis β that has angle, dish type pivoted arm (7) is along having opened an axial straight trough on the axial direction.

4. according to claim 2 described speed regulating mechanisms, it is characterized in that: crank slot plate (16) is enclosed within on the dish type pivoted arm (7), is Spielpassung between them, and spring collar (20) is stuck on the dish type pivoted arm (7), is used for preventing producing between them moving to axial.