CN2293680Y - Rolling contact planetary worm driving device - Google Patents

Abstract

The utility model relates to a planetary worm driving device with rolling contact, which is composed of enveloping worms served as center wheels, a cylindrical inner helical gear, a plurality of planetary wheels embedded with rolling bodies and a planetary carrier supporting the planetary wheels, wherein, two center wheels are coaxial with a tie bar; the axes of the spinning motion and the axes of the revolution motion of the planetary wheels are staggered vertically in space. When moving, the planetary wheels move along a ring surface under the restriction of a planetary frame and a center worm with the ring surface; rolling bodies on the planetary wheels move spirally on the ring surface. The utility model can be served as a mechanical driving device with large power and large speed ratio; the utility model integrates the advantages of worm drive and planetary drive, and is a novel driving mechanism with high power weight ratio.

Description

Contact planet worm gears rolls

The utility model relates to a kind of rolling contact planet worm gearing.

In existing technology, as having proposed a kind of toroid transmission in the D.B.P. 1301682, but its stator is the helical teeth on a kind of inner ring surface, domestic and international research proves that its processing is very difficult in recent years, and for the manufacturability of assembling, must do paired separation structure, precision is wayward, very unfavorable to engagement driving, be difficult to promote the use of.And for example also mentioned a kind of planet worm gearing in the U. S. Patent 5387162, during work, one of them worm gear type gear of going up assembling is driven by the group of the worm screw on another, or separated worm screw Driven by Coaxial, usually have plural worm gear to be distributed in the ring internal gear in the mechanism, and internal gear constitute output thus.In addition, the annulate shaft tie-rod that connects worm gear also can be constituted output by plural worm-gear driven, and perhaps the two is output.Compare with aforementioned patent, the difficulty in the processing is alleviated to some extent, and axial force is cancelled, but adopts the orthodont engagement, and efficient decreases, and bearing capacity reduces, and mechanism's pretension problem has constituted the key technical problem that is difficult to grasp again simultaneously.

The purpose of this utility model is exactly at the deficiencies in the prior art, a kind of planet worm gears of easy processing is proposed, wherein cylindrical internal gear be processed with better manufacturability, can utilize gear shaping machine processing, and toroid helicoids worm can be processed with conventional method with screw-casing.

The purpose of this utility model is achieved in that the utility model is made up of four critical pieces: anchor ring central worm 1, cylindrical internal gear 2 is inlaid with the planet wheel 4 of some rolling elements that can freely rotate 3 and the planet carrier 5 that supports planet wheel.Central worm 1 is installed in cabinet 6 center hole positions as input (or output) axle, participates in the side that engaged worm gear parts 7 is positioned at central worm 1.Central worm 1 can be an integral body with gear on worm part 7, also can be the key connecting parts.Central worm 1 relies on bearing 8,9,10 to rotate in the center hole of planet carrier 5.Central worm 1 will be moved or power passes by the engagement of central worm 1 with planet wheel 4.Planet wheel 4 carries out engagement driving with cylindrical internal gear 2 simultaneously, planet carrier 5 is as output (or input) member of final motion or power, and planet wheel 4 can arrange as requested that several also are uniformly distributed in the circumferencial direction of central worm 1 as the element of sharing load in the device.During motion, the motion plane of rotation of planet wheel is staggered vertical in the space with the rotational axis of central worm 1, and planet wheel 4 is subjected to planet carrier 5 and central worm 1 constraint along moving of anchor ring.The rolling element of inlaying on the planet wheel 43 can be installed several as requested, and the shape of rolling element 3 can be spheroid, cylindrical body or cone.Cylindrical internal gear 2 is during generally as stator, is integral by Bolt Connection with cabinet 6, also can welding forming, and cabinet 6 can be that overall structure also can be the subdivision structure.Elaborate principle of the present utility model below in conjunction with accompanying drawing: the new-type rolling contact planet worm gearing that the utility model is made up of anchor ring central worm 1, cylindrical internal gear 2, the planet wheel 4 that studs with some rolling elements that can freely rotate 3 and planet carrier (being rotor) 5.In the movement process, the rotational axis of central worm 1 is all the time perpendicular to the plane of rotation of planet wheel 4 around central worm 1 planetary motion of doing, and planet wheel 4 is subjected to planet carrier 5 and central worm 1 constraint along moving of anchor ring.Planet wheel can be as the case may be along the circumferential directions of central worm 1 several, participate in engagement simultaneously with central worm 1 and cylindrical internal gear 2, share load jointly.In the utility model, the rotational axis of anchor ring central worm axis and planet wheel transmission is staggered in spatial vertical, during motion, planet wheel 4 meshes with worm screw 1 and cylindrical internal gear 2 simultaneously, it moves by planet carrier 5 and central worm 1 constraint along anchor ring, and the rolling element 3 on the planet wheel is done the spiral motion on the anchor ring.Usually have one to be fixed in anchor ring central worm and the cylindrical internal gear, another is the input link of motion or power, and tie-rod is the output link of motion or power.Rolling element shape in the utility model on the planet wheel can be ball, cylindrical body or cone, and rolling element evenly distributes at the planet wheel circumferencial direction, and its quantity is more than 2.Planet wheel also can be uniform a plurality of in the space as required.

That the utility model can be used as is high-power, the mechanical transmission of large speed ratio, it is the combination of worm drive and Gear Planet Transmission, characteristics such as compact structure, power dividing, bearing capacity height, the gear range of characteristics such as it is low with the noise that worm drive had, the vibration is little and total number of teeth in engagement is many simultaneously and Gear Planet Transmission is big are combined closely, combining the advantage of worm drive and Gear Planet Transmission, is a kind of novel transmission mechanism with higher-wattage weight ratio.The utility model also can be used as differential attachment and uses.

Fig. 1 is the utility model schematic diagram

Fig. 2 is the utility model structural drawing

Fig. 3 is a ball rolling element structural drawing on the planet wheel in the utility model

Fig. 4 is a cylinder rolling element structural drawing on the planet wheel in the utility model

Fig. 5 is a cone rolling element structural drawing on the planet wheel in the utility model

Embodiment: at first select the ball that is shaped as of rolling element, make the transformation mechanism of entire mechanism, in transformation mechanism, use the tooth curve of mesh theory designing and calculating central worm and internal gear, on the toroid helicoids worm working machine tool, process worm screw then.According to the tooth curve of internal gear, the design gear shaper cutter has machining interal on the gear shaping machine of screw-casing then.Internal gear also can be used spherical hobbing cutter processing on the gear hobbing machine of certain model.

Claims (1)

1. a rolling contacts the planet worm gears; it is characterized in that: mainly by anchor ring central worm [1]; cylindrical internal gear [2]; planet carrier [5] composition that is inlaid with the planet wheel [4] of some rolling elements that can freely rotate [3] and supports planet wheel; wherein there is one to be fixed in anchor ring central worm [1] and the cylindrical internal gear [2] usually; another is the input link of motion or power; and tie-rod is the output link of motion or power; central worm [1] is as inputing or outputing axle; be installed in cabinet [6] center hole position; participation engaged worm gear parts [7] is positioned at a side of central worm [1]; central worm [1] can be an integral body with the gear on worm part; also can be the key connecting parts; central worm [1] relies on bearing [8]; [9]; [10] in the center hole of planet carrier [5], rotate; central worm [1] will be moved or power passes by the engagement of central worm [1] with planet wheel [4]; planet wheel [4] carries out engagement driving with cylindrical internal gear [2] simultaneously; planet carrier [5] is as the output or the input link of final motion or power; planet wheel in the device [4] can be arranged several as requested; and be uniformly distributed in the circumferencial direction of central worm [1] as the element of sharing load; during motion; the motion plane of rotation of planet wheel is staggered vertical in the space with the rotational axis of central worm [1]; and planet wheel [4] is subjected to planet carrier [5] and central worm [1] constraint along moving of anchor ring; the rolling element of inlaying on the planet wheel [4] [3] can be installed several as requested; the shape of rolling element [3] can be a spheroid; cylindrical body or cone; cylindrical internal gear [2] is during generally as stator; be integral by Bolt Connection with cabinet [6]; also can welding forming; cabinet [6] can be an overall structure, also can be the subdivision structure.

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