CN2197155Y

CN2197155Y - Boring machine for brake drum with rotary spindle feeding by worm-gear drive

Info

Publication number: CN2197155Y
Application number: CN 93232366
Authority: CN
Inventors: 于官中; 安凤云
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-26
Filing date: 1993-11-26
Publication date: 1995-05-17
Anticipated expiration: 2003-11-26

Abstract

The utility model discloses main shaft rotary feed type brake drum boring machine of worm and worm wheel gear screw bar type. The structure of a main shaft, component revolution feed, and a sedentary boring cutter is adopted; through a pulley group, a worm screw, a worm wheel, a floating shaft, a drive and driven speed change gear, a main shaft sleeve, and keys, an electric motor can realize the rotation of the main shaft. A helical differential mechanism is formed by that a drive and driven feed gear wheel is used to drive a screw rod to rotate, and a helical pair is composed of the thread in the screw rod and the floating shaft; under the function of a connecting plate, the axial feed of the main shaft can be realized. The form errors such as conicity produced by the component revolution and the cutter axial feed type boring processing can be eliminated. The cutter axial feed mechanism can be omitted to simplify the structure of a machine tool, and the cutter axial feed mechanism can also be changed into a boring cutter rotatory feeding mechanism to process the boring machine in the inner hole of a component.

Description

Boring machine for brake drum with rotary spindle feeding by worm-gear drive

The utility model relates to a kind of boring machining tool of special used for processing brake drum endoporus, and it adopts main shaft and workpiece rotation and feeding, the fixed structure of knife rest.

As T8365 type horizontal brake drum boring machine that Chengdu automobile guarantee machinery plant produces etc., mostly belong to the rotation of main shaft band workpiece at the special-purpose brake drum boring machine that uses at present, cutter is along the boring processing of main shaft and workpiece rotation direction feeding type.This processing mode is difficult to guarantee that the axial feed direction of cutter is parallel fully with the workpiece rotation with main shaft, especially under machine tool guideway has than mistake or long-term situation about using after wearing and tearing, more difficult assurance, thereby make the brake drum endoporus after the processing often produce form errors such as tapering, thereby influence crudy.Overcome above shortcoming, can make the processing mode of the above-mentioned type into main shaft and workpiece rotation and axial feed, add cutter in man-hour fixed processing mode on knife rest.As long as main shaft and workpiece rotation are stable, just can eliminate the form errors such as tapering that above-mentioned processing mode occurs easily, improve the crudy of brake drum endoporus.

The patent No. is that the patent of 89216329.1 " spindle swivel feeding type brake drum boring machine " is so a kind of structure as shown in Figure 5.As shown in Figure 5: motor 12 drives countershaft 4, initiatively change-

speed gearing group

5,6 rotations of driven change-speed gearing group by belt pulley 11, belt 10, belt pulley 9, drive collar bush 27 rotations through key 28 again,, constituted the rotational motion mechanism of main shaft 3 and workpiece 1 after key 24 drives main shafts 3 and workpiece 1 rotation.The countershaft 4 of rotation drives initiatively feed

gear wheel group

7 and 8 rotations of driven feed gear wheel group by key 25, the differential attachment that forms through the variable speed rotation of the screw pair of driven feed gear wheel group 8 inner hole thread groove m and main shaft 3 screw mandrel a and main shaft 3, driven feed gear wheel group 8, constituted moving axially of main shaft 3 and workpiece 1, i.e. axial feed mechanism.The advantage of this workpiece of being made up of garden stud wheel, leading screw etc. and spindle swivel feeding mechanism has overcome the rotation of main shaft band workpiece exactly, the shortcoming of the form errors such as tapering that cutter is brought along main shaft and workpiece rotation direction feeding type boring processing.But this design is perfect inadequately, and the main shaft that has leading screw is long, the inconvenience of bringing processes to make; The leading screw a of main shaft 3 and sliding bearing 15 wear and tear easily, thereby have influenced crudy.

The purpose of this utility model is still with workpiece rotation and axial feed, add cutter in man-hour fixed processing mode on knife rest and replace the rotation of main shaft band workpiece, cutter is along the processing mode of main shaft and workpiece rotation direction feeding type, but the machine tool structure design more becomes reasonable, reach and to improve brake drum endoporus crudy, can improve lathe service life again, simplify purposes such as lathe manufacturing process.

The purpose of this utility model can by following arrange to revolve reach: (1) main shaft and workpiece rotating mechanism: drive the worm-gears rotation through the belt wheel group with motor, and drive floating axle and the active speed change garden stud wheel group rotation that is fixed on the floating axle, the driven speed change garden stud wheel that is meshed with it is assembled in its endoporus and passes to be slidingly matched on the collar bush of the outer garden of main shaft cylinder, and utilize key between driven speed change garden stud wheel group and the collar bush, key between collar bush and the main shaft, the rotation of driven speed change garden stud wheel group is passed on the main shaft, make main shaft and the workpiece rotation that is contained on the main shaft positioning clamping device.(2) main shaft and workpiece feed mechanism: the leading screw of lead screw shaft partly passes the floating axle endoporus that endoporus has thread groove to be slidingly matched, active feeding garden stud wheel on driven feeding garden stud wheel being housed and being fixed on the collar bush left end to be slidingly matched on the outer garden cylinder of lead screw shaft left end is meshed, and the right-hand member of main shaft and lead screw shaft is installed in the rolling bearing that is connected on the connecting plate that main shaft and lead screw shaft use with interference fit respectively.Motor makes the collar bush rotation when rotating, drive the driven feeding garden stud wheel rotation of the active feeding garden stud wheel and the lead screw shaft left end of main shaft left end, and the process key makes the lead screw shaft rotation, the differential attachment that the screw pair of the variable speed rotation of the lead screw shaft of rotation and the floating axle of rotation and lead screw shaft, floating axle endoporus forms, having constituted moving axially of main shaft and workpiece is axial feed mechanism.(3) cutter adds and maintains static mechanism man-hour: the knife rest that is fixed with boring cutter is fixed on the main spindle box front side, and the screw pair that the feed screw nut that moves perpendicular to the main-shaft axis direction is formed can be used to adjust cutting depth.

The utility model has the advantages that: (1) is owing to adopted main shaft and workpiece rotation and feeding, the fixed processing mode of boring cutter and knife rest, as long as the quality of fit of main shaft 12 and sliding bearing 5,11, form accuracy etc. are better, just can eliminate the form errors such as tapering of brake drum finished surface, improve the crudy of brake drum endoporus.Because of knife rest is fixed, do not do to ask feeding along the axle of main-shaft axis direction, can save tool axis to feed mechanism, simplified machine tool structure.(2) compare with 89216329.1 patents, it is reasonable that machine tool structure more becomes.Save former main shaft leading screw partly, simplified the lathe manufacturing process, improved the lathe life-span.

(3) can repack boring cutter into main axis rotation and feeding, the boring machine that workpiece is motionless with the endoporus of processing work, enlarges the lathe scope of application.The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is the utility model structural representation.

Fig. 2 is an A-A generalized section among Fig. 1.

Fig. 3 is a B-B generalized section among Fig. 1.

Fig. 4 repacks the inner boring mill schematic diagram into.

Fig. 5 is 89216329.1 patent structure schematic diagrames.

Fig. 1 also is a Figure of abstract.

In Fig. 1,2,3: (1) main shaft and workpiece rotating mechanism are: belt wheel group 33 is fixed in the rotating shaft of motor 24, belt wheel group 32 is fixed on the axle head of worm screw 22, belt 23 is enclosed within on the belt wheel group 33,32, and worm screw 22 is meshed with worm gear 34, and its axis is vertical mutually.The endoporus of worm gear 34 is fixed on the outer garden cylinder of floating axle 20, and the endoporus of floating axle 20 has thread groove m, and its two axle head is bearing in to be slidingly matched in the sliding bearing 26,19 in the main spindle box 7 on the bed piece 25.Between right part, worm gear and the sliding bearing 19 of the outer garden of floating axle 20 cylinder, be fixed with initiatively speed change garden stud wheel group 21, the endoporus of making the driven speed change garden stud wheel group 10 of corresponding engagement with it is sleeved on to be slidingly matched on the outer garden cylinder of collar bush 6.Have keyway z on the endoporus of driven speed change garden stud wheel group 10, have keyway y on the outer garden cylinder of the collar bush 6 of corresponding part with it, be inserted with the key 9 that work with it is slidingly matched in z, y two keyways.The outer garden cylinder of main shaft 12 passes to be slidingly matched in the front and back sliding bearing 5,11 that is installed on the main spindle box 7.Collar bush 6 its endoporus and main shaft 12 outer garden cylinders are slidingly matched and are installed on the outer garden cylinder of the main shaft 12 between the main shaft sliding bearing 5,11.Have keyway h on the endoporus of collar bush 6, have keyway f on the corresponding with it main shaft 12 outer garden cylinders, be inserted with the key 8 that work with it is slidingly matched between keyway h, the f.Motor 24 drives floating axle 20 rotations and

stud wheel group

21,10 rotations of the moving speed change garden of principal and subordinate by belt wheel group 33, belt 23, belt wheel group 32, worm screw 22, worm gear 34, drive main shaft 12 and workpiece 3 rotations through keyway z, key 9, keyway y, collar bush 6, keyway h, key 8, keyway f again, constituted main shaft and workpiece rotational motion mechanism.(2) main shaft and workpiece feed mechanism are: be fixed with initiatively feeding garden stud wheel 36 on the cylinder of the outer garden of the left end of collar bush 6, the leading screw a of lead screw shaft 18 partly is through in the thread groove m of floating axle 20 endoporus to be slidingly matched, its left end is with in the sliding bearing 29 that is slidingly installed on main spindle box 7, endoporus is housed on the outer garden cylinder of the lead screw shaft 18 of 29,26 on sliding bearing makes the driven feeding garden stud wheel 27 that is slidingly matched with it, and be meshed with active feeding garden stud wheel 36.Have keyway k on the endoporus of driven feeding garden stud wheel 27, have keyway g on the outer garden cylinder of corresponding with it lead screw shaft 18, be inserted with the key 28 that work with it is slidingly matched in k, g two keyways.The right-hand member of lead screw shaft 18 is installed in the rolling bearing 17 of connecting plate 15 bottoms with interference fit.The right-hand member of main shaft 12 is installed in the rolling bearing 13 on connecting plate 15 tops with interference fit.Connecting plate 15

usefulness nuts

14,16 are pressed on end face d, the e of main shaft 12, lead screw shaft 18, require main shaft 12 and collar bush 6 coaxial lines; Lead screw shaft 18 and float 20, coaxial line, and require the axis of main shaft 12, collar bush 6 to parallel with the axis of lead screw shaft 18, floating axle 20.Drive collar bush 6 rotations when motor rotates, the active feeding garden stud wheel 36 of its left end drives 27 rotations of driven feeding garden stud wheel, drives lead screw shaft 18 rotations through keyway k, key 28, keyway g.Because the lead screw shaft 18 of rotation and the variable speed rotation of floating axle 20 and m, the formed differential attachment of a screw pair constitute moving axially of main shaft 12 and workpiece 3 under the effect of connecting plate 15, promptly constituted axial feed mechanism.(3) cutter adds and maintains static mechanism man-hour and be: boring cutter 31 is installed on the knife rest 30 that is fixed on the main spindle box 7.It is motionless to add man-hour knife rest fixed-site, do not do along the main-shaft axis direction move forward into to, move, adjust cutting depth and adopt feed screw nut screw pair F to produce perpendicular to the main-shaft axis direction.(4) the tight device of work piece positioning is: the front end axle of main shaft 12, put endoporus earlier and make the back taper locating piece 35 of matched in clearance with it, lean against on the main shaft 12 front end face P and make axial location, put workpiece 3 again with endoporus location, put endoporus and main shaft 12 front end axles again and make the preceding taper locating piece 2 of matched in clearance, again nut 1 is enclosed within on the screw thread C of main shaft 12 front ends, just can be fastened on workpiece on the main shaft 12.Two ends of locating endoporus b because of workpiece contact the location with the conical surface of forward and backward taper locating piece 2,35, just can guarantee that the axis of workpiece endoporus b and main shaft 12 rotations coincide.

In addition: will pour machine oil in the main spindle box 7, the oil sealing 4 that prevents lubricating oil leakage is equipped with in the main spindle box outside at sliding bearing 5,11,19 places.The boring cutter 39 that the utility model also can repack into as shown in Figure 4 is contained on the main shaft 12 by cutter holder 40, and workpiece 41 is fixed on the workbench 37 of bed piece 25 front ends through anchor clamps 38, and workpiece machining hole center line is overlapped with main shaft 12 rotations.Utilize the rotation of boring cutter and axial feed to finish endoporus boring processing, use as inner boring mill to fixation workpiece.

Claims

1, a kind of brake drum boring machine, brake drum workpiece 3 is installed in by endoporus and is sleeved on main shaft 12 front end axles with matched in clearance and leans against back taper locating piece 35 on the front end face P, be sleeved on the preceding taper locating piece 2 on the main shaft 12 front end axles with matched in clearance and be sleeved on the positioning clamping device that the clamp nut 1 on the main shaft 12 front end male thread C formed by endoporus, it adds and adopts the fixed structure of cutter man-hour, the knife rest 30 that promptly is fixed with boring cutter 31 is fixed on the front side of main spindle box 7, employing is regulated cutting depth perpendicular to the feed screw nut screw pair F that main shaft 12 axis directions move, cutter shaft is to motionless during boring, the structure that it is characterized in that rotation of main shaft and workpiece and feeding, that is:

(1) belt wheel group 33 is fixed in the rotating shaft of motor 24, and belt wheel group 32 is fixed on the axle head of worm screw 22, and belt 23 is enclosed within on the belt wheel group 33,32;

(2) worm screw 22 is meshed with the orthogonal worm gear 34 of its axis;

(3) endoporus of worm gear 34 be fixed on have in the axis hole screw thread m, be bearing on the outer garden cylinder of the floating axle 20 on the sliding bearing 26,19 in the main spindle box that is installed on the bed piece 25 7;

(4) right part of floating axle 20 outer garden cylinders be worm gear 34 with sliding bearing 19 between be fixed with the active speed change garden stud wheel group of being formed by the different garden stud wheel of several diameters 21;

(5) endoporus of the driven speed change garden stud wheel group of being made up of the different garden stud wheel of several diameters 10 that is meshed with speed change garden stud wheel group 21 respective gears initiatively is sleeved on to be slidingly matched on the outer garden cylinder of collar bush 6;

(6) endoporus of driven speed change garden stud wheel group 10 has keyway z, has the sub-y of keyway on the outer garden cylinder of the collar bush 6 of corresponding part with it, is inserted with the key 9 that work with it is slidingly matched in z, y two keyways;

(7) the outer garden cylinder of main shaft 12 passes to be slidingly matched on the forward and backward sliding bearing 5,11 that is installed on the main spindle box 7;

(8) collar bush 6 is slidingly matched with its endoporus and main shaft 12 outer garden cylinders, is installed on the post surface, main shaft 12 outer garden between the sliding bearing 5,11;

(9) have keyway h on the endoporus of collar bush 6, have keyway f on the corresponding with it main shaft 12 outer garden cylinders, be inserted with the key 8 that work with it is slidingly matched between keyway h, the f;

(10) be fixed with initiatively feeding garden stud wheel 36 on the cylinder of the outer garden of the left end of collar bush 6;

(11) the leading screw a of lead screw shaft 18 partly is through in the thread groove m of floating axle 20 endoporus with sliding fiting sleeve, and its left end is contained in to be slidingly matched in the sliding bearing 29 on the main spindle box 7;

(12) on the outer garden cylinder of 29,26 lead screw shaft 18 of sliding bearing, endoporus is housed makes the driven feeding garden stud wheel 27 that is slidingly matched with it, and be meshed with active feeding garden stud wheel 36;

(13) have keyway k on the endoporus of driven feeding garden stud wheel 27, have keyway g on the outer garden cylinder of corresponding with it lead screw shaft 18 left ends, be inserted with the key 28 that work with it is slidingly matched between keyway k, the g;

(14) the outer garden of the right-hand member of lead screw shaft 18 cylinder is installed in interference fit in the rolling bearing 17 of connecting plate 15 bottoms, and the outer garden of the right-hand member of main shaft 12 cylinder is installed in the rolling bearing 13 on connecting plate 15 tops with interference fit;

(15) connecting plate 15 usefulness nuts 14,16 are pressed on end face d, the e of main shaft 12, lead screw shaft 18, main shaft 12, collar bush 6 coaxial lines, and parallel with the lead screw shaft 18 of coaxial line, the axis of floating axle 20;

(16) motor 24 is by belt wheel group 33, belt 23, belt wheel group 32, worm screw 22, worm gear 34, drive floating axle 20, the rotation of driving and driven speed change garden stud wheel group 21,10 respective gears, again through keyway z, key 9, keyway y, collar bush 6, keyway h, key 8, keyway f, drive main shaft 12 and workpiece 3 rotations, constitute the rotational motion mechanism of main shaft 12 and workpiece 3;

(17) the active feeding garden stud wheel 36 of Xuan Zhuan collar bush 6 left ends drives driven feeding garden stud wheel 27 rotations that are meshed with it, drive lead screw shaft 18 rotations through keyway k, key 28, keyway g, the lead screw shaft 18 of rotation and the rotation of the variable speed of floating axle 20, and m, the formed differential attachment of a screw pair, under the effect of connecting plate 15, constitute moving axially of main shaft 12 and workpiece 3, i.e. axial feed mechanism.

2, as the said brake drum boring machine of claim 1, it is characterized in that in the main spindle box 7 lubricating oil being housed, oil sealing 4 respectively is equipped with in the outside of its sliding bearing 5,11,19.

3, as claim 1 or 2 said brake drum boring machines, it is characterized in that lathe can repack workpiece 41 into and not be installed on the main shaft 12, and be installed on guaranteed workpiece machining hole center line and the anchor clamps 38 that main shaft 12 rotations overlap on the workbench 37 of bed piece 25 front ends, boring cutter 39 is installed on the main shaft 12 by cutter holder 40, workpiece maintains static, main shaft and boring cutter rotation and feeding are with the boring machine of processing work endoporus.