CN103042422A

CN103042422A - Double-gear gapleass feeding box

Info

Publication number: CN103042422A
Application number: CN2013100083902A
Authority: CN
Inventors: 董岩; 刘晓峰; 董志惠; 魏春祺
Original assignee: Liuzhou Zhengling Heavy Numerical Control Machine Co Ltd
Current assignee: Liuzhou Zhengling Heavy Numerical Control Machine Co Ltd
Priority date: 2013-01-10
Filing date: 2013-01-10
Publication date: 2013-04-17
Anticipated expiration: 2033-01-10
Also published as: CN103042422B

Abstract

The invention discloses a double-gear gapleass feeding box and relates to the technical field of mechanical device manufacture. The double-gear gapleass feeding box is provided with driving gears arranged inside a box body and installed on an input shaft, the driving gears are meshed with a gear installed on a transmission shaft, a drive gear installed on the transmission shaft is meshed with a gear installed on a primary speed-reducing shaft, and two transferring gears opposite in gear tooth rotating direction are arranged on the primary speed-reducing shaft. One transferring gear, a gear on a first secondary speed-reducing shaft, a gear on a first tertiary speed-reducing shaft and the gears on the output shaft form a first gear chain. The other transferring gear, a gear on a second secondary speed-reducing shaft, a gear on a second tertiary speed-reducing shaft and the gears on the output shaft form a second gear transmission chain. The gears on the output shaft are meshed with a work table gear ring. The problem of quality reduction of processed parts caused by complete machine tool accuracy influenced by transmission gear gaps can be solved.

Description

The Double-gear anti-backlash feed box

Technical field

The present invention relates to plant equipment manufacturing technology field, especially a kind of geared feed case for the heavy duty machine tools transmission.

Background technology

Gear drive is large-scale, the heavy digital control machine tool that a kind of type of belt drive, particularly stroke that heavy duty machine tools are mainly selected surpass 10 meters, and the servo feed execution unit is to adopt the rack-and-pinion transmission to replace ball-screw-transmission.Gear drive has simple in structure, the advantages such as adjustment easily are installed, but employing gear drive, always having backlass under normal working condition exists, when interrupted cut and forward and reverse motion, will inevitably produce vibration and noise, the gap between the gear directly affects positioning accuracy and repetitive positioning accuracy, affect the machining accuracy of lathe, cause the Quality Down of processing parts; Therefore when adopting the full depth tooth roller box to carry out variable-speed feeding speed, often owing to the gap between the gear can't be eliminated, particularly the forward and reverse gap of the long output shaft of gear-box of driving-chain is strengthened, can't be satisfied the specification requirement of Digit Control Machine Tool feeding, directly affect the precision of Digit Control Machine Tool complete machine.

Summary of the invention

Technical problem to be solved by this invention provides a kind of Double-gear anti-backlash feed box, and it can solve the complete machine precision that affects lathe because of the existence in travelling gear gap, causes the problem of processing parts Quality Down.

In order to address the above problem, technical scheme of the present invention is: this Double-gear anti-backlash feed box includes casing, be provided with the driving gear that is installed on the power shaft in the described casing, described driving gear and the driven gear engagement that is contained on the power transmission shaft, at described power transmission shaft driven wheel is installed, described driven wheel is meshed with deceleration gear on being contained in the one-level deceleration axis, is provided with two transmission gears that gear teeth rotation direction is opposite on the described one-level deceleration axis; Described transmission gear be installed in driven gear and driving gear on the two-stage speed-down axle first, be installed in three grades on the deceleration axis first driven gear and driving gear and driven gear and the output gear that is installed on the output shaft consist of the first gear transmission chain; Described transmission gear be installed in driven gear and driving gear on the two-stage speed-down axle second, be installed in three grades on the deceleration axis second driven gear and driving gear and driven gear and the output gear that is installed on the output shaft consist of the second gear transmission chain; The hydraulic pressure gap oil cylinder that disappears is installed on the axle head of described one-level deceleration axis.

In the technique scheme, more specifically scheme can also be: the described driving gear that is installed on described three grades of deceleration axis first is shifting slide gear with the described driving gear that is installed on described three grades of deceleration axis second, described shifting slide gear is connected with corresponding shift fork positioner respectively, described shift fork positioner comprises the conversion fork that is connected with described shifting slide gear, and described conversion fork is fixedly connected with the piston that separates oil cylinder on being installed in casing; Described conversion fork is connected with and stretches out the outer stroke lever of casing, and described stroke lever stretches out the outer end of casing collision block is housed, and at described collision block travel switch is housed.

Because adopt technique scheme, the present invention has following beneficial effect:

1, the present invention is according to two groups of gear train Synchronous Transmission, diaxon is that output shaft drives the respectively transmission in the other direction of two output gears, the flank that relative rotation between two output gears makes two gears respectively with the two opposite sides face engagement of tooth bar teeth groove, gapless during the commutation transmission reaches the purpose of the gap that disappears.

2, the present invention and high accuracy tooth bar coupling is used for large-scale, heavy digital control machine tool straight-line feed axle driving, and result of use is much better than ball-screw-transmission.

3, closed-loop control is used in the transmission of the present invention and high accuracy tooth bar coupling, and the positioning accuracy of lathe, repetitive positioning accuracy are easy to guarantee.

4, the present invention's gear drive feeding, transmission stiffness is high, and output torque is large, pulse equivalency is little; Make simultaneously easy installation and reliablely, efficient is high, easy control clearance elimination gear gap in installation process; Cost is than the Dual-Servo Motor low and reliable in action of gap that disappears in addition.

Description of drawings

Fig. 1 is structural representation of the present invention.

Fig. 2 is expanded view of the present invention.

Fig. 3 is M-M cutaway view among Fig. 1.

The specific embodiment

The present invention is further described below in conjunction with drawings and Examples:

Fig. 1, Fig. 2 and Double-gear anti-backlash feed box shown in Figure 3, include casing 19, the casing 19 interior power shaft I servomotor outer with being installed in casing 19 is connected, driving gear 1 on the power shaft I, with driven gear 2 engagements that are contained on the power transmission shaft II, in the power transmission shaft II driven wheel 3 is installed, driven wheel 3 is meshed with deceleration gear 4 on being contained in one-level deceleration axis III, by gear initiatively 1, driven gear 2, driven wheel 3, tooth reduction of speed wheel 4 be delivered to feed motion on the one-level deceleration axis III; Be provided with two transmission gear 5A and transmission gear 5B that the identical rotation direction of parameter is opposite on the one-level deceleration axis III, transmitting gear 5A and transmitting gear 5B is helical gear; Transmit gear 5A and the driven gear 6A and the driving gear 7A that are installed on the two-stage speed-down axle first IV, be installed in three grades on the deceleration axis first V driven gear 8A and driving gear 9A and driven gear 10A and the output gear 11A that is installed on the output shaft VI consist of the first gear transmission chain; Transmit gear 5B and the driven gear 6B and the driving gear 7B that are installed on the two-stage speed-down axle second VII, be installed in three grades on the deceleration axis second VIII driven gear 8B and driving gear 9B and driven gear 10B and the output gear 11B that is installed on the output shaft IX consist of the second gear transmission chain; The hydraulic pressure gap oil cylinder that disappears is installed on the one-level deceleration axis III two axial ends, the described hydraulic pressure gap oil cylinder pushing one-level deceleration axis III that disappears will produce displacement, two helical gear 5A on it and helical gear 5B produce trace and move axially, at this moment the gear of the first gear transmission chain, the gear of the second gear transmission chain just simultaneously turns over an angle with opposite direction, make output gear 11 A and the output gear 11 B anti-flank of tooth that is meshed with two of tooth bar (or gear ring) respectively be adjacent to and eliminate the gap, when servomotor band driven input shaft I is carried out forward, the first gear driving rack (or gear ring) is moved to the left (rotation) and does the main transmission campaign, the gap motion of doing to disappear of the second gear; Servomotor band driven input shaft I when counter-rotating, A, thus the second gear function exchanges and makes feed motion and just. the transmission of backward feed realization gapless; The feeding hydraulic pressure gap oil cylinder that disappears possesses mechanical position limitation. the location defencive function.Be installed in three grades of driving gear gear 9A on the deceleration axis first V, be installed in three grades of driving gear 9B on the deceleration axis second VIII and be shifting slide gear, two shifting slide gears are connected with corresponding shift fork positioner respectively, every cover shift fork positioner comprises the conversion fork 18 that is connected with shifting slide gear, and conversion fork 18 is fixedly connected with the piston that separates oil cylinder 13 14 on being installed in casing 19; Conversion fork 18 1 ends are connected with the stroke lever 17 that stretches out outside the casing 19, and stroke lever 17 stretches out casing 19 outer ends collision block 1 is housed, and travel switch 16 is housed in the stroke of collision block 15; Can switch mutually with main motion and separate by separating oil cylinder 14, can satisfy the action request of different plant equipment, send signal by travel switch 16, make and separate oil cylinder 14 and possess combination and separate recognition function.

Claims

1. Double-gear anti-backlash feed box, include casing (19), it is characterized in that: be provided with the driving gear (1) that is installed on the power shaft (I) in the described casing (19), described driving gear (1) and driven gear (2) engagement that is contained on the power transmission shaft (II), at described power transmission shaft (II) driven wheel (3) is installed, described driven wheel (3) is meshed with deceleration gear (4) on being contained in one-level deceleration axis (III), is provided with two transmission gears (5A, 5B) that gear teeth rotation direction is opposite on the described one-level deceleration axis (III); Described transmission gear (5A) be installed in driven gear (6A) and driving gear (7A) on the two-stage speed-down axle first (IV), be installed in driven gear (8A) and the driving gear (9A) on three grades of deceleration axis first (V) and be installed in driven gear (10A) and output gear (11A) formation the first gear transmission chain on the output shaft (VI); Described transmission gear (5B) be installed in driven gear (6B) and driving gear (7B) on the two-stage speed-down axle second (VII), be installed in driven gear (8B) and the driving gear (9B) on three grades of deceleration axis second (VIII) and be installed in driven gear (10B) and output gear (11B) formation the second gear transmission chain on the output shaft (IX); The hydraulic pressure gap oil cylinder that disappears is installed on the axle head of described one-level deceleration axis (III).

2. Double-gear anti-backlash feed box according to claim 1, it is characterized in that: be installed in the described driving gear (9A) on described three grades of deceleration axis first (V) and the described driving gear (9B) that is installed on described three grades of deceleration axis second (VIII) is shifting slide gear, described shifting slide gear is connected with corresponding shift fork positioner respectively, described shift fork positioner comprises the conversion fork (18) that is connected with described shifting slide gear, and described conversion fork (18) is fixedly connected with the piston that separates oil cylinder (13) (14) on being installed in casing (19); Described conversion fork (18) is connected with and stretches out the outer stroke lever (17) of casing (19), and described stroke lever (17) stretches out the outer end of casing (19) collision block (15) is housed, and at described collision block (15) travel switch (16) is housed.