CN2525304Y

CN2525304Y - Hindley screw inner engaged speed reducing unit

Info

Publication number: CN2525304Y
Application number: CN 02202668
Authority: CN
Inventors: 王利民
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-04
Filing date: 2002-02-04
Publication date: 2002-12-11
Anticipated expiration: 2012-02-04

Abstract

A hindley worm inner meshing speed reducing unit comprises a casing, a worm and a worm gear, wherein, the worm is spherical in axial direction, and a worm shaft of the worm is rotatablely supported on the casing; the worm gear is a spherical inner tooth worm gear, and inner teeth of the worm gear mesh with the worm; the worm gear is connected with an output shaft; the output shaft is rotatablely supported on the casing. The utility model has the advantages that: as the worm gear and the worm are in inner meshing type, and the meshing surfaces are matched arc surfaces, the utility model has the advantages of small volume, large meshing tooth number, large torque which can be transmitted and low noise. Rolling sleeve teeth can greatly reduce transmission friction to improve transmission efficiency.

Description

Engaging speed reducer in the hourglass worm

Technical field

The utility model relates to a kind of speed reducer, specifically is engaging speed reducer in a kind of hourglass worm.

Background technique

The shortcoming of the common worm and gear structure that speed reducer adopted of existing employing worm and gear transmission is: because both take larger volume for outer gearing or side engagement; And total number of teeth in engagement is few between the worm screw of cylindricality and the circular worm gear, and it is little to transfer moment, is the slip transmission between gear, and friction is big.

Summary of the invention

The purpose of this utility model just provides engaging speed reducer in the hourglass worm that a kind of volume is little, total number of teeth in engagement is many, friction is little.

Technical solutions of the utility model are: comprise casing, worm and worm wheel, described worm screw is sphere in the axial direction, its worm shaft rotational support is on casing, described worm gear is a sphere internal tooth worm gear, its internal tooth is meshed with described hourglass worm, this worm gear is connected with output shaft, and this output shaft rotational support is on casing.

The internal tooth of described internal tooth worm gear is made up of the roll sleeve axle in roll sleeve and its axle center, and this roll sleeve axle is vertically connected on the inner face of worm gear matrix, and the axial profile of this roll sleeve and the teeth groove of described hourglass worm match.

The axial spheric curvature of the curvature of described globoid worm gear and hourglass worm is identical.

The utility model has the advantages that: owing to worm and gear is interior engagement, volume is little, total number of teeth in engagement is many for cambered surface, the event that coincide has for Surface of action, but transmission torque is big and the little advantage of noise.The roll sleeve tooth also can reduce gearing friction greatly, improves transmission efficiency.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is that worm-gear tooth of the present utility model is the embodiment's of full depth tooth a structural representation;

Fig. 2 is the A-A sectional drawing of Fig. 1;

Fig. 3 is that worm-gear tooth of the present utility model is the embodiment's of roll sleeve a structural representation;

Fig. 4 is the B-B sectional view of Fig. 3.

Embodiment

Referring to Fig. 1 and Fig. 2, this embodiment comprises casing 1, worm screw 2 and worm gear 3, and described worm screw 2 is sphere in the axial direction, and its worm shaft 21 rotational support are on casing 1.Described worm gear 3 is a sphere internal tooth worm gear, and its internal tooth 31 is meshed for the common gear teeth and with described hourglass worm 2, and worm gear 3 is connected with output shaft 4, and these output shaft 4 rotational support are on casing 1.Because worm gear 3 is interior engagements with worm screw 2, and the axle 21 of worm screw 2 will be supported on the shell 1, so worm gear 3 can only be meshed with a side of screw rod 2, promptly will make worm gear 3 avoid worm shaft 21.When the maximum diameter of worm screw 2 during less than the Outside radius of worm gear 3, then output shaft 4 can be supported in the both sides of shell 1.

When the spherical radius R of worm gear 3 passed through the axle center O of worm screw 2, both meshed preferably.

Referring to Fig. 3 and Fig. 4, this enforcement and a last embodiment's difference is that the axle 33 of roll sleeve 32 is vertically connected on the inner face of worm gear matrix 34 with the fixing tooth 31 usefulness roll sleeve teeth replacement of worm gear 3.The shape of the teeth groove of the axial profile of roll sleeve 32 and worm screw 2 matches.When hourglass worm 2 and worm gear 3 transmissions, become rolling friction between the two, reduced frictional force greatly, reduced power transmission loss.

The curvature of worm gear 3 of the present utility model can be identical with the axial curvature of hourglass worm 2, and the curvature of hourglass worm 2 also can be slightly larger than the curvature of worm gear 3.Because both curvature equates or is approaching, makes total number of teeth in engagement between the two increase, each spiral on the whole hourglass worm 2 all participates in engagement, has improved transmission torque greatly.

Claims

1, engaging speed reducer in a kind of hourglass worm, comprise casing, worm and worm wheel, it is characterized in that: described worm screw is sphere in the axial direction, its worm shaft rotational support is on casing, described worm gear is a sphere internal tooth worm gear, its internal tooth is meshed with described hourglass worm, and this worm gear is connected with output shaft, and this output shaft rotational support is on casing.

2, engaging speed reducer in the hourglass worm according to claim 1, it is characterized in that: the internal tooth of described internal tooth worm gear is made up of the roll sleeve axle in roll sleeve and its axle center, this roll sleeve axle is vertically connected on the inner face of worm gear matrix, and the axial profile of this roll sleeve and the teeth groove of described hourglass worm match.

3, engaging speed reducer in the hourglass worm according to claim 1 is characterized in that: the axial spheric curvature of the curvature of described globoid worm gear and hourglass worm is identical.