CN102022478A

CN102022478A - Worm helical gearing mechanism

Info

Publication number: CN102022478A
Application number: CN201010560760XA
Authority: CN
Inventors: 徐亚明; 段桂俊; 王燕; 刘莹苹; 程蓓蓓
Original assignee: Dalian Machine-Tool Group Co Ltd
Current assignee: Dalian Machine Tool (Digital) Co., Ltd.
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-04-20

Abstract

The invention discloses a worm helical gearing mechanism which comprises a worm (1) and a helical gear (2). The invention is characterized in that the worm (1) and the helical gear (2) are engaged with each other, the axial line of the worm (1) is perpendicular to the axial line of the helical gear (2), the worm (1) is an involute worm with a leading angle equal to the helix angle of the helical gear (2) and a normal modulus equal to the normal modulus of the helical gear (2). The invention has advantages of large transmission ratio, stable transmission, compact structure, small noise and self-locking. In most cases, the invention can substitute for worm wheel transmission and can be widely applied on transmission structures such as feeding cases, slide carriage cases and gearboxes of machine tools as well as feeding cases of quenching cars, which realizes motions of feeding and speed change.

Description

The worm and helical gear driving mechanism

Technical field

The present invention relates to a kind of driving mechanism, particularly a kind of worm and helical gear driving mechanism.

Background technique

The use of worm screw at present all with worm wheel, worm gear is difficult for processing in this driving mechanism, needs special equipment and instrument, the processing cost height; The difficulty of assembling is big, and the processing difficulties in the staggered hole of casing of worm and gear is installed, and manufacturing efficiency is low; The structure shape of worm gear has determined to select high-abrasive material for use, generally selects tin bronze for use, causes carrying out surface heat and handles, and hardness and low impact resistance are poor, and bearing capacity is little.

Summary of the invention

The worm and helical gear driving mechanism that the purpose of this invention is to provide low, the good assembling of a kind of easy processing, cost, can improve hardness and shock resistance, bearing capacity is big overcomes the deficiency of Worm and Worm Gear Driving mechanism.

Worm and helical gear driving mechanism of the present invention, comprise worm screw, helical gear, worm screw nibbles body mutually with helical gear, shaft axis of worm screw and the perpendicular setting of helical gear shaft axis, described worm screw is an involute worm, the angle of lead of worm screw equates that with helical gear helix angle the normal module of worm screw equates with helical gear normal module.

Worm and helical gear driving mechanism of the present invention has remedied the deficiency of worm and gear on processing and assembly technology.Adding does not need dedicated tool man-hour, thereby has reduced processing cost, shortened the manufacture cycle.In assembling, there is not the assembly problem of center coincidence in the worm and helical gear drive mechanism, greatly reduces the difficulty of assembling, has reduced the difficulty of processing in the staggered hole of casing yet, has improved manufacturing efficiency; Owing to utilized helical gear and worm meshing, so the helical gear material can select 40Cr for use, can carry out surface heat and handle and improve hardness, and after the fine finishing, helical gear impact resistance and bearing capacity are big; Have simultaneously that velocity ratio is big, stable drive, compact structure, noise be little, and advantages such as self-locking performance are arranged.Under the overwhelming majority's situation, can substitute Worm and Worm Gear Driving, can be widely used in realizing motions such as feeding and speed change in the drive mechanisms such as feed box of feed box, slip crate, gearbox and quenching car of lathe.

Description of drawings

Fig. 1 is the form structure schematic representation of the specific embodiment of the invention;

Fig. 2 is the structural representation of the new shape embodiment of this practicality;

Fig. 3 is an A portion enlarged diagram shown in Figure 2;

Fig. 4 is that schematic representation is looked on a left side shown in Figure 2.

Embodiment

Shown in Fig. 1,2,3,4: 1 is worm screw, and 2 is the helical gear that is meshed with worm screw 1, the vertical setting mutually of the shaft axis of worm screw 1 and helical gear 2, and worm screw 1 and helical gear 2 are the involute formula.The helical pitch Pz of worm screw 1, the angle of lead γ of worm screw 1 equates that with the helixangle of helical gear 2 normal module of worm screw 1 equates with the normal module of helical gear 2.After guaranteeing above-mentioned condition, worm screw and helical gear can mesh preferably, reach the purpose of transferring power.

Claims

1. worm and helical gear driving mechanism, comprise worm screw (1), helical gear (2), it is characterized in that: worm screw (1) nibbles body mutually with helical gear (2), the perpendicular setting of shaft axis of shaft axis of worm screw (1) and helical gear (2), described worm screw (1) is an involute worm, the angle of lead of worm screw (1) equates that with the helix angle of helical gear (2) normal module of worm screw (1) equates with the normal module of helical gear (2).