CN207848351U - A kind of rack pinion anti-backlash mechanism for machining center - Google Patents

Abstract

A kind of rack pinion anti-backlash mechanism for machining center, including speed reducer for servo motor, upper support seat, upper torsion plate, lower torsion plate, gear, lower gear, rack and disk spring part, it is characterised in that：The speed reducer for servo motor is arranged on upper support seat, and the output shaft of speed reducer for servo motor is connect by expansion sleeve with lower gear after upper support seat, and lower gear upper end is connect by flat key with upper torsion plate, and flat key is fixed on clamp spring on upper torsion plate by axis；Upper torsion plate is connected by straight pin B and the lower torsion plate of lower section, and the lower section of lower torsion plate is equipped with rack, and the upper part of rack engages connection with gear, and the lower part of rack engages connection with lower gear.The utility model passes through the mutual cooperation of gear and lower gear and the effect of butterfly spring, ensure rack pinion gapless, crowded teeth phenomenon is impacted or is occurred in gap when wheel and rack being avoided to engage, pedestal stable drive so that positioning accuracy and repetitive positioning accuracy are protected between rack and pinion.

Description

A kind of rack pinion anti-backlash mechanism for machining center

Technical field

The utility model is related to machine tool drive component technology field, specifically a kind of rack pinion for machining center disappears Gap mechanism.

Background technology

Rack-and-pinion is a kind of machine applications such as lathe widely transmission mechanism, has many advantages, such as stable drive, efficient, The welcome in market is received, but in process, since rigging error, rack-and-pinion itself such as deform at the various problems, caused There are gap in engagement, this gap not only results in the tiny sundries such as some break flours and enters these gaps, shadow rack-and-pinion Production is rung, can also be to needing high-precision transmission mechanism to produce serious influence, how to eliminate the gap of rack and pinion mechanism becomes One must face the problem of.

Invention content

In view of the deficiencies of the prior art, the utility model provides a kind of rack pinion anti-backlash mechanism for machining center, The gap between gear gear mechanism can be effectively eliminated.

The technical solution of the utility model is：A kind of rack pinion anti-backlash mechanism for machining center, including servo electricity Machine speed reducer, upper support seat, upper torsion plate, lower torsion plate, gear, lower gear, rack and disk spring part, feature exist In：The speed reducer for servo motor is arranged on upper support seat, and the output shaft of speed reducer for servo motor leads to after upper support seat It crosses expansion sleeve to connect with lower gear, fixation is attached by bolt A between expansion sleeve and lower gear, lower gear upper end passes through flat Key is connect with upper torsion plate, and flat key is fixed on clamp spring on upper torsion plate by axis；Upper torsion plate passes through straight pin B and lower section Lower torsion plate connection, the lower section of lower torsion plate are equipped with gear, and gear is connect by straight pin A with lower torsion plate, lower torsion The lower section of disk is equipped with rack, and rack is fixed at by bolt B on the mounting plate by lower torsion plate, the upper part of rack Connection is engaged with gear, the lower part of rack engages connection with lower gear；It is equipped with mutually on upper torsion plate and lower torsion plate Equally distributed four grooves in interval being used cooperatively, the interior dish-shaped bullet being equipped with for pushing upper torsion plate and lower torsion plate of groove Spring part, upper torsion plate are equipped with holding screw, and holding screw is contradicted to the upper end of disk spring part, for adjusting dish-shaped spring part It is elastic, to change the back-shaped elastic force of disk spring part, the both sides of disk spring part are respectively equipped with support base and cylinder key seat, Cylinder key seat is equipped with straight pin B, and straight pin B can be finely tuned on cylinder key seat again, and dish is placed for stopping butterfly spring Spring part position offset, butterfly spring part makes the left side on the tooth socket on lower tooth wheel and rack engage, gear and rack On tooth socket on right side engagement.

Further, the disk spring part is made of eight disk springs, and butterfly spring is installed in a circumferential direction.

Further, the disk spring is circular arc flake structure.

The beneficial effects of the utility model are：Mutual cooperation and butterfly of the utility model by gear and lower gear The collective effect of spring ensures rack pinion gapless, and gap when wheel and rack being avoided to engage is impacted or squeezed Tooth phenomenon, pedestal stable drive so that positioning accuracy and repetitive positioning accuracy are protected between rack and pinion.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is M-M cross-sectional views in Fig. 1.

In figure,（1）Speed reducer for servo motor,（2）Upper torsion plate,（3）Lower torsion plate,（4）Straight pin A,（5）Spiral shell Bolt A,（6）Expansion sleeve,（7）Lower gear,（8）Gear,（9）Rack, (10)-bolt B, (11)-flat key,（12）Cylinder Pin B,（13）Axis clamp spring,（14）Upper support seat,（15）Disk spring part,（16）Holding screw,（17）Cylinder key seat, （18）Support base.

Specific implementation mode

Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：

A kind of rack pinion anti-backlash mechanism for machining center as depicted in figs. 1 and 2, including speed reducer for servo motor （1）, upper support seat（14）, upper torsion plate（2）, lower torsion plate（3）, gear（8）, lower gear（7）, rack（9）With dish-shaped bullet Spring part（15）, it is characterised in that：The speed reducer for servo motor（1）It is arranged in upper support seat（14）On, speed reducer for servo motor （1）Output shaft pass through upper support seat（14）After pass through expansion sleeve（6）With lower gear（7）Connection, expansion sleeve（6）With lower gear （7）Between pass through bolt A（5）It is attached fixation, lower gear（7）Upper end passes through flat key（11）With upper torsion plate（2）Connection is put down Key（11）Pass through axis clamp spring（13）It is fixed on torsion plate；Upper torsion plate（2）Pass through straight pin B（12）With the lower torsion of lower section Power disk（3）Connection, lower torsion plate（3）Lower section be equipped with gear（8）, gear（8）Pass through straight pin A（4）With lower torsion plate （3）Connection, lower torsion plate（3）Lower section be equipped with rack（9）, rack（9）Pass through bolt B（10）It is fixed at and is located at lower torsion Disk（3）On other mounting plate, rack（9）Upper part and gear（8）Engagement connection, rack（9）Lower part and lower gear （7）Engagement connection；Upper torsion plate（2）With lower torsion plate（3）On be equipped with equally distributed four of the interval being used in conjunction with each other Groove, groove is interior to be equipped with for pushing upper torsion plate（2）With lower torsion plate（3）Disk spring part（15）, upper torsion plate（2）On Equipped with holding screw（16）, holding screw（16）Contradict disk spring part（15）Upper end, for adjusting dish-shaped spring part （15）It is elastic, to change disk spring part（15）Back-shaped elastic force, disk spring part（15）Both sides be respectively equipped with support Seat（18）With cylinder key seat（17）, cylinder key seat（17）It is equipped with straight pin B（12）, straight pin B（12）It can cylinder key seat again （17）Upper fine tuning places disk spring part for stopping butterfly spring（15）Position offset, butterfly spring part make lower gear （7）With rack（9）On tooth socket on left side engagement, gear（8）With rack（9）On tooth socket on right side engagement.

When forward direction is mobile, gear（8）Along rack（9）Main transmission, lower gear are played the role of in movement（7）With gear （8）Between pass through upper torsion plate（2）With lower torsion plate（3）There is connection so that lower gear（7）It is followed by rack（9）It moves up It is dynamic, play the role of auxiliary driving；Overturning, when counter motion, lower gear（7）Play the role of main transmission, at this point, gear（8）Due to The effect of disk spring so that gear（8）With rack（9）Between in sending the connection of engagement, gear（8）It is followed by tooth Item（9）Auxiliary driving is played the role of in upper movement, either positive mobile or reverse movement, lower gear（7）With rack（9）On Left side engagement on tooth socket, gear（8）With rack（9）On tooth socket on right side engagement, meanwhile, pass through disk spring Push gear（8）With lower gear（7）Inwardly micro contraction or micro extension outward, to ensure that rack-and-pinion（9）Transmission Gapless, and avoid wheel and rack（9）Crowded teeth phenomenon is impacted or is occurred in gap when engagement.

Further, the disk spring part（15）It is made of eight disk springs, butterfly spring is mounted on circumferencial direction On.

Further, the disk spring is circular arc flake structure.

The description of the embodiments and the specification only illustrate the principle of the present utility model and most preferred embodiment, is not taking off Under the premise of from the spirit and scope of the utility model, the utility model also has various changes and improvements, these changes and improvements It both falls in claimed the scope of the utility model.

Claims (3)

1. a kind of rack pinion anti-backlash mechanism for machining center, including speed reducer for servo motor, upper support seat, upper torsion Disk, lower torsion plate, gear, lower gear, rack and disk spring part, it is characterised in that：The speed reducer for servo motor setting On upper support seat, the output shaft of speed reducer for servo motor is connect by expansion sleeve with lower gear after upper support seat, tensioner Fixation is attached by bolt A between set and lower gear, lower gear upper end is connect by flat key with upper torsion plate, and flat key passes through Axis is fixed on clamp spring on upper torsion plate；Upper torsion plate is connected by straight pin B and the lower torsion plate of lower section, under lower torsion plate Side is equipped with gear, and gear is connect by straight pin A with lower torsion plate, and the lower section of lower torsion plate is equipped with rack, and rack passes through Bolt B is fixed on the mounting plate by lower torsion plate, and the upper part of rack engages connection with gear, under rack Connection is engaged with lower gear in part；It is equipped with the interval being used in conjunction with each other equally distributed four on upper torsion plate and lower torsion plate A groove, the interior disk spring part being equipped with for pushing upper torsion plate and lower torsion plate of groove, upper torsion plate are equipped with clamp screw Nail, holding screw are contradicted to the upper end of disk spring part, for adjusting the elastic of dish-shaped spring part, the both sides point of disk spring part Not She You support base and cylinder key seat, cylinder key seat is equipped with straight pin B, and straight pin B can be finely tuned on cylinder key seat, is used for again It stops butterfly spring and places disk spring part position offset, butterfly spring part makes the left side on the tooth socket on lower tooth wheel and rack Side engagement, gear are engaged with the right side on the tooth socket on rack.

2. the rack pinion anti-backlash mechanism according to claim 1 for machining center, it is characterised in that：The dish bullet Spring part is made of eight disk springs, and butterfly spring is installed in a circumferential direction.

3. the rack pinion anti-backlash mechanism according to claim 2 for machining center, it is characterised in that：The dish bullet Spring is circular arc flake structure.