CN202539587U

CN202539587U - Lathe spindle unit

Info

Publication number: CN202539587U
Application number: CN2012201237330U
Authority: CN
Inventors: 伏江涛
Original assignee: HUBEI GUANGDA AUTOMATIC BAR FEEDER Co Ltd
Current assignee: Hubei Yixing intelligent equipment Limited by Share Ltd
Priority date: 2012-03-29
Filing date: 2012-03-29
Publication date: 2012-11-21
Anticipated expiration: 2022-03-29

Abstract

The utility model discloses a lathe spindle unit comprising a spindle, a front bearing and a rear bearing installed on the spindle, a guide sleeve and a spline part, wherein the spindle is installed on a bearing block and internally provided with a mandril; the front end of the mandril is fixed with a chuck sleeve which is internally provided with a chuck; an elastic part is arranged between the chuck and the chuck sleeve; and the rear end of the spindle is provided with a spindle locating device which comprises a locating wheel, a locating pin and a locating cylinder. The lathe spindle unit improves the location accuracy of the spindle, reduces defective rate and improves production efficiency, the temperature rise is low and the influence on the processed product precision is small.

Description

A kind of lathe spindle unit

Technical field

The utility model relates to a kind of main axle unit, relates in particular to a kind of lathe spindle unit.

Background technology

Shaft type turnning and milling complex centre main shaft electronic main shaft and the telescopic main shafts of adopting are walked in numerical control more on the market now.The electronic main shaft of high-end lathe is the Japanese world.Fanuc and MITSUBISHI company on the basis of their advanced servomotor technology with the electronic main shaft function admirable of famous bearing such as NSK company co-production, high scooter 30000000 changes, angle orientation is accurate, operates steadily.Particularly Fanuc company has almost monopolized the market of the electronic main shaft of Chinese numerically controlled lathe.But all high the going against accepted conventions of Japanese electric main shaft supply Chinese market price, one 180,000 high RMB, and also reach three or four months delivery date, even half a year.Medium and small lathe is difficult to cooperate with it.Domestic also have the rich top grade numerically controlled lathe electricity consumption main shaft in Shandong but because they are incompatible with the control system of reputable brand, generally all is the employing Frequency Converter Control.Allow rotating speed also not high, saying so allows 6000 to change, but in fact changes higher with regard to temperature rise to more than 4000, and the vibrations precision influence to converted products greatly are bigger.It is not really high to add positioning accuracy, therefore can't be widely accepted.

The Chinese patent Granted publication number is CN 201086132Y, and Granted publication day is that the utility model patent on July 16th, 2008 discloses a kind of lathe spindle unit, and it has main shaft; Be installed on the front and back two bearings on the main shaft, be placed in the outer sleeve of bearing, pull bar is arranged in the main shaft; The pull bar front end is fixed with the chuck cover; Chuck places in the chuck cover and is provided with elastic component between the two, and chuck openend and chuck cover are equipped with the coadapted conical surface, and end cap is pressed on chuck and chuck upper shield in the main shaft.

Said apparatus can make the processing rigidity strengthen; And processing is accurate more, but has C axle calibration function owing to walk core type numerical control cutting center, and it is not enough depending synchronous tightening force alone; This device main shaft when cutting is certain to shake; At this time positioning accuracy has just been run, and just can't guarantee the precision of processing parts, causes the occurrence probability of waste product to increase.

Summary of the invention

The purpose of the utility model is the problem that overcomes existing apparatus main shaft locating effect difference, and a kind of lathe spindle unit of main shaft good positioning effect is provided.

For realizing above purpose; The technical solution of the utility model is: a kind of lathe spindle unit, and comprise main shaft, be installed in fore bearing and rear bearing, guide pin bushing and splined section on the main shaft, said main shaft is installed on the bearing block; Be provided with push rod in the said main shaft; The push rod front end is fixed with the chuck cover, is provided with chuck in the said chuck cover, is provided with elastic component between said chuck and the chuck cover; The rear end of said main shaft is equipped with the main shaft positioner, and said main shaft positioner comprises locating wheel, alignment pin and location cylinder.

The main axle servo motor is installed on the said spindle drum, on the said main axle servo drive axle of motor synchronous pulley is installed, said synchronous pulley is connected through being with synchronously with main shaft.

Open and close claw, tapering ring set and adjusting nut are installed on the said main shaft, the rotating shaft core is installed on the Open and close claw.

Said splined section comprises splined shaft and spline bearing overcoat, is connected through hardboard between said spline bearing overcoat and the bearing block, is connected through band synchronously between splined shaft and main shaft, the guide pin bushing.

Said fore bearing and main shaft are interference fit, and shrink value is 0.002～0.004mm, and said rear bearing and main shaft are matched in clearance, and fit clearance is 0.002～0.006mm.

Compared with prior art, the utlity model has following benefit:

1, the utility model has increased the main shaft positioner, has improved the positioning accuracy of main shaft, has reduced the substandard products rate of output, has improved production efficiency, has reduced cost.

2, adopt main shaft, main axle servo motor to be installed in the structure on the same spindle drum in the utility model, so both guaranteed the main shaft rigidity, the depth of parallelism of guaranteed main axle servo electrical axis axis and alignment of shafts axis.

3, fore bearing and main shaft are interference fit in the utility model, and rear bearing and main shaft are matched in clearance, and the accuracy guarantee that is beneficial to chuck is installed like this has the big gap of rising at the back with the running adstante febre.

4, the utility model adopts main axle servo motor band 3GT synchronous pulley in transmission, and transmission efficiency is high, the accurate and stable drive of gearratio.

5, the forward and backward bearing in the utility model adopts the high-speed spindle bearing special grease, once fill and can not change in 3 years in right amount, and spindle drum takes Open architecture, and performance of ventilating is good, and actual 8000 temperature rises when changeing are all in 25 ℃.

Description of drawings

Fig. 1 is the structural representation (analysing and observe) of the utility model.

Fig. 2 is the A-A face cutaway view of Fig. 1.

Fig. 3 is the B-B face cutaway view of Fig. 1.

Among the figure: main shaft 1, fore bearing 2, rear bearing 3, guide pin bushing 4, bearing block 5, push rod 6; Chuck cover 7, chuck 8, elastic component 9, main shaft positioner 10, locating wheel 11, alignment pin 12; Positioning cylinder 13, main axle servo motor 14, synchronous pulley 15, Open and close claw 16, tapering ring set 17, adjusting nut 18; Rotating shaft core 19, splined shaft 20, spline bearing overcoat 21, hardboard 22, shift fork 23, bearing 24.

The specific embodiment

Below in conjunction with the description of drawings and the specific embodiment the utility model is done further detailed explanation:

Referring to Fig. 1, Fig. 3, a kind of lathe spindle unit comprises main shaft 1, is installed in fore bearing 2 and rear bearing 3, guide pin bushing 4 and splined section on the main shaft 1; Said splined section comprises splined shaft 20 and spline bearing overcoat 21; Said main shaft 1 is installed on the bearing block 5 with main axle servo motor 14, is provided with push rod 6 in the said main shaft 1, and push rod 6 front ends are fixed with chuck cover 7; Be provided with chuck 8 in the said chuck cover 7; Be provided with elastic component 9 between said chuck 8 and the chuck cover 7, the end cap of main shaft 1 front end is pressed on chuck 8 and chuck cover 7 lids in the main shaft 1, and the rear end of said main shaft 1 is equipped with main shaft positioner 10; Said main shaft positioner 10 comprises locating wheel 11, alignment pin 12 and location cylinder 13; Synchronous pulley 15 is installed on the power transmission shaft of said main axle servo motor 14, and said synchronous pulley 1 and main shaft 1 are connected through band synchronously, are connected through hardboard 22 between said spline bearing overcoat 21 and the bearing block 5; Is connected through band synchronously between splined shaft 20 and main shaft 1, the guide pin bushing 4, can realizes the run-in synchronism of main shaft 1 and guide pin bushing 4.

Said fore bearing 2 is an interference fit with main shaft 1; Shrink value is 0.002～0.004mm; Said rear bearing 3 is a matched in clearance with main shaft 1, and fit clearance is 0.002～0.006mm, and the accuracy guarantee that is beneficial to chuck so is installed has the big gap of rising at the back with the running adstante febre.

Open and close claw 16, tapering ring set 17 and adjusting nut 18 are installed on the said main shaft 1, rotating shaft core 19 is installed on the Open and close claw 16.

Referring to Fig. 1-Fig. 2; The process of main shaft chuck locking material is: open and close cylinder and connect the bearing 24 on shift fork 23 and the shift fork 23 through the flake joint, when the switching cylinder promoted forward, shift fork 23 and bearing 24 can drive tapering ring set 17 upward displacement vertically; Tapering ring set 17 can back down Open and close claw 16; Make Open and close claw 16 do the pull bar motion, push rod 6 and chuck cover 7 are pushed to move ahead, compressing chuck 8 locking materials around rotating shaft core 19; The process of main shaft chuck unwound material is: when the switching cylinder promotes backward; Shift fork 23 and bearing 24 can drive tapering ring set 17 displacement downwards vertically; Can drive tapering ring set 17 and break away from, lean on the elastic component 9 in the chuck cover 7 that chuck cover 7 was opened with chuck in 8 minutes with Open and close claw 16, thus unwound material.

Referring to Fig. 3, when lathe starts C axle calibration function, stop behind main shaft 1 calibration, positioning cylinder 13 obtains signal promotion alignment pin 12 and blocks locating wheel 11, thereby the radial clearance of main shaft 1 with rear bearing 3 eliminated, and reaches locating effect.Mill sell out after, C axle calibration function stop, positioning cylinder 13 drives alignment pins 12 and pulls back, and accomplishes position fixing process.

Claims

1. lathe spindle unit; Comprise main shaft (1), be installed in fore bearing (2) and rear bearing (3), guide pin bushing (4) and splined section on the main shaft (1); Said main shaft (1) is installed on the bearing block (5); Be provided with push rod (6) in the said main shaft (1); Push rod (6) front end is fixed with chuck cover (7), is provided with chuck (8) in the said chuck cover (7), is provided with elastic component (9) between said chuck (8) and the chuck cover (7); It is characterized in that: the rear end of said main shaft (1) is equipped with main shaft positioner (10), and said main shaft positioner (10) comprises locating wheel (11), alignment pin (12) and location cylinder (13).

2. a kind of lathe spindle unit according to claim 1; It is characterized in that: main axle servo motor (14) is installed on the said spindle drum (5); Synchronous pulley (15) is installed on the power transmission shaft of said main axle servo motor (14), and said synchronous pulley (15) is connected through being with synchronously with main shaft (1).

3. a kind of lathe spindle unit according to claim 1 is characterized in that: Open and close claw (16), tapering ring set (17) and adjusting nut (18) are installed on the said main shaft (1), rotating shaft core (19) is installed on the Open and close claw (16).

4. a kind of lathe spindle unit according to claim 1; It is characterized in that: said splined section comprises splined shaft (20) and spline bearing overcoat (21); Be connected through hardboard (22) between said spline bearing overcoat (21) and the bearing block (5), be connected through band synchronously between splined shaft (20) and main shaft (1), the guide pin bushing (4).

5. a kind of lathe spindle unit according to claim 1; It is characterized in that: said fore bearing (2) is an interference fit with main shaft (1); Shrink value is 0.002～0.004mm, and said rear bearing (3) is a matched in clearance with main shaft (1), and fit clearance is 0.002～0.006mm.