CN2305264Y - Fixed shaft type boring mill for automobile brake drum - Google Patents

Abstract

The utility model relates to a boring mill for an automobile brake drum. The utility model is composed of a machine base, an upright post, an electric motor, a longitudinal and a cross slide plates, a cutting feed mechanism, a clutch retarding mechanism, etc. The utility model is characterized in that the machine base is provided with a step type fixing axle; the fixing axle is provided with an upper and a lower bearings; a moving ring of the lower bearing is fixedly connected to a gear wheel working disk 7. An inner cavity of the machine base of the utility model is not provided with grease liquid to lubricate, and the utility model forms a dry type operating state. The utility model has the advantages that the structure is reasonable and compact, the rigidity is good when the complete machine works, the precision is high, the manufacture cost is low, and the mounting and maintenance are very convenient.

Description

Fixed shaft type automobile brake drum boring machine

The utility model relates to a kind of automobile brake drum special boring mill.

Brake drum is the strength member of automobile brake system.During automobile brake, the interior garden working face of brake drum promptly rouses face and shoe brake friction, when drum face during because of phenomenons such as wearing and tearing generation mistake garden or groovings, gently then influence retro-speed, heavy then cause brake failure, jeopardize traffic safety, therefore to the bulging face of wearing and tearing, must in time carry out the boring finishing.In prior art, be the brake drum boring machine of representative with T8350A type brake drum boring machine, be the vertical boring mill of the upright rotation of a kind of main shaft.The basic structure and the operation principle of this boring machine are: on a gearbox top of being made up of actuated elements such as gear and worm gears a vertical type low speed output shaft is arranged, be called for short main shaft, the cutting feed mechanism that one side of main shaft is made up of column, longitudinal slide, cross slide and knife rest etc., the movement locus of knife rest feeding is parallel with the axis of main shaft.Workpiece (brake drum) is fastened on the main shaft with centralized positioning awl circle, and main shaft drives workpiece with the speed rotation during work, and the boring cutter on the knife rest carries out boring along main shaft to the drum face.The major defect of above-mentioned prior art is: because processed drum diameter is bigger, and rear wheel brake drum height is higher, the application point that has formed the preceding bearing reaction of main shaft is to the bigger amount of overhanging between the brake drum most significant end cutting stress action spot, make main shaft when the cutting of boring drum, produce bigger strain, cause the cutting vibrations, influence drum face processing fineness.In addition, rotating speed is higher when working owing to the gear-worm gear of this boring machine transmission system, necessary bath lubrication, so manufacture difficulty is big, and production cost height, maintenance difficult.

The purpose of this utility model is the shortcoming that overcomes above-mentioned prior art, and the automobile brake drum that a kind of Cutting Stiffness is good, machining accuracy is high, simple in structure, easy to maintenance boring machine is provided.

The utility model comprises support 8, be positioned at the column 25 on the support 8, longitudinal slide 30, cross slide 31, clamping cantilever 31 ', motor 24, cutting feed mechanism and clutch reducing gear, it is characterized by affixed step dead axle 6 on the support 8, dead axle 6 be provided with upper bearing (metal) 2 and lower bearing 2 ', the affixed epicone seat 3 of the moving-coil of upper bearing (metal) 2, lower bearing 2 ' the affixed working gear dish 7 of moving-coil, the upper end central part of working gear dish 7 be provided with down awl seat 3 '.

The further feature of the utility model is:

Small pulley 23 on motor 24 output shafts drives by bearing 13 through driving-belt 36 and supports the big belt wheel 12 that is arranged on the hollow central siphon 11, it is affixed with small pulley 15 that the affixed small pulley 15 in big belt wheel 12 bottoms, the gear 9 that is meshed with working gear dish 7 pass hollow central siphon 11.

Clutch reducing gear of the present utility model is by bidirectional clutch 17 and the lead screw shaft 42 that is bearing on the tooth rest 19, change gear axle and the following double linked wheel 18 that meshes successively, middle double linked wheel 21, last double linked wheel 20 and final stage gear 22 are formed, following double linked wheel 18 links to each other with small pulley 15 through driving-belt 16, tooth rest 19 is by bolt 19 ' be fixed on the bottom of support 8, and the inner chamber of support 8 does not have oil lubrication, is the dry-running state.

Remarkable advantage of the present utility model is: 1, boring spindle, i.e. dead axle 6 and the support 8 fastening rigid bodies that are combined into staticly all the time do not change.Brake drum to be processed serves as a supporting location benchmark with this dead axle, and dead axle only plays the supporting positioning action, and is simple in structure, can reduce the cutting vibrations effectively, improves machining accuracy and complete machine work rigidity.2, transmission mechanism compact conformation of the present utility model, rotating speed is low to need not oil lubrication, is dry-running, and clamping cantilever and cross slide are that monoblock cast forms, and production cost is low, and difficulty of processing is little.3, because motor of the present utility model places the central space position of principal post, and electrical apparatus control system also is arranged on the recess of column cylinder, has tightened the volume of complete machine, and floor space is little, easy to operate simple, help safety in production.

Accompanying drawing 1, be the utility model structural representation.

Accompanying drawing 2, be the enlarged drawing of support one side.

Accompanying drawing 3, clutch control partial structure schematic diagram.

Accompanying drawing 4, support and tooth rest connection diagram.

Accompanying drawing 5, Fig. 4 A-A cutaway view.

Accompanying drawing 6, electric appliance control box position view.

Among the figure: the 1-trim ring; The 2-bearing; 3-epicone seat; 3 '-following awl seat; 4-workpiece (automobile brake drum); 5-workpiece outer shroud; The 6-dead axle; 7-working gear dish; The 8-support; 9-tooth axle; The 10-bearing; The hollow central siphon of 11-; The big belt wheel of 12-; The 13-bearing; The 14-nut; The 15-small pulley; The 16-driving-belt; The 17-bidirectional clutch; Double linked wheel under the 18-; The 19-tooth rest; 19 '-bolt; The last duplicate gear of 20-; Duplicate gear among the 21-; 22-final stage gear; The 23-small pulley; The 24-motor; The 25-column; The 26-leading screw; The 27-screw; The 28-rack-and-pinion; The 29-handle; The 30-longitudinal slide; The 31-cross slide; 31 '-the clamping cantilever; 32-leading screw manual pulley; The 33-cutter head; The 34-knife bar; The 35-nut; The 36-driving-belt; The 37-control stick; The 38-seat board; The 39-eccentric shaft; The little axle of 40-; The 41-bearing; The 42-lead screw shaft; The 43-feather key; The 44-bearing block; The 45-nut; The 46-flat key; The 47-ring washer.

Further describe structure of the present utility model and operation principle below in conjunction with drawings and Examples.

Shown in Fig. 1 .2, motor 24 of the present utility model is the vertical position, inner space that is installed on column 25, and small pulley 23 is housed on the motor shaft, and drives big belt wheel 12 by driving-belt 36, and this driving-belt can be made up of two V belts.Big belt wheel 12 by two garden taper roller bearing 13 positioning supports fastening with support 8 be on the hollow central siphon 11 of rigid body, and with nut 14 axial restraints, there is a small pulley 15 lower surface of belt wheel 12 greatly, this small pulley is fixedlyed connected with belt wheel 12 greatly by bolt.Connect tooth axle 9 with flat key 46 in the interstitial hole of small pulley 15, this tooth axle upper end with double row self aligning ball bearings 10 positioning supports in hollow central siphon 11 upper seat holes, tooth axle 9 drives by the bearing positioning support and is connecting working gear dish 7 runnings of dead axle 6 roots that are rigid body with support 8 during work, the upper surface of this working gear dish fixedly connected awl down seat 3 '.Workpiece 4 is the conical surface of outer shroud 5 of two garden taper roller bearings in the hub hole of brake drum to be processed and last, following awl seat 3.3 ' combination, and by upper and lower bearing 2.2 ' and dead axle 6 coaxial positioning supporting, and be axially fixed on the dead axle 6 with trim ring 1 and nut 35.Awl seat 3 under passing through during 7 rotations of working gear dish ' driving workpiece 4 suitable cutter head 33 cutting directions rotates.

Structure and operation principle referring to accompanying drawing 1,2,3, cutting feed mechanism of the present utility model are all simpler.Accompanying drawing 1, combine and the small pulleys 15 of rotation synchronously drive following double linked wheel 18 rotations that are positioned at bearing on the lead screw shaft 42 through driving-belt 16 with big belt wheel 12 is fastening in 2, duplicate gear 21 in driving successively by this gear of taking turns top ', last duplicate gear 20 and not level gear 22 rotations, level gear 22 is not passed to lead screw shaft 42 to revolving force by bidirectional clutch 17 and the feather key 43 that is arranged on lead screw shaft 42 diameters of axle, make its with not the level gear 22 rotate synchronously, and by on column 25, descending line slip at a slow speed with the longitudinal slide 30 fastening screws that combine 27 drive longitudinal slides 30, the machined surface of the 33 pairs of workpiece 4 of cutter head on the knife bar 34 carries out cutting of garden week and axial feed at this moment, all bores until working face.When behaviour's screw mandrel 37 is allocated to the centre neutral gear position to bidirectional clutch 17, screw mandrel 26 stops operating, cutter head 33 feed-disablings are dialled handle 29 again, and the gear through between longitudinal and transverse slide plate, tooth bar pair 28 make cross slide 31 slippage left, cutter head 33 breaks away from workpiece 4 machined surfaces, dial bidirectional clutch 17 again, it is combined with following double linked wheel 18, leading screw 26 and this are taken turns with the speed running, and, finish rapid return by making upwards slippage fast such as slide plate and knife rest in length and breadth with the longitudinal slide 30 fastening screws that connect 27.Whole travelling gears of cutting feed mechanism all be bearing in lead screw shaft 42 by bearing and two axles being fastened together with tooth rest 19 on, tooth rest 19 and support 8 usefulness bolts 19 ' be fastenedly connected.

Claims (6)

1, a kind of fixed shaft type automobile brake drum boring machine comprises support 8, is positioned at the column 25 on the support 8, longitudinal slide 30, cross slide 31, clamping cantilever 31 ', motor 24, cutting feed mechanism and clutch reducing gear, it is characterized by affixed step dead axle 6 on the support 8, dead axle 6 be provided with upper bearing (metal) 2 and lower bearing 2 ', the affixed epicone seat 3 of the moving-coil of upper bearing (metal) 2, lower bearing 2 ' the affixed working gear dish 7 of moving-coil, middle part, the upper surface of working gear dish 7 be provided with down awl 3 '.

2, by the described a kind of fixed shaft type automobile brake drum boring machine of claim 1, the small pulley 23 that it is characterized by on motor 24 output shafts links to each other with the big belt wheel 12 that is arranged on the hollow central siphon 11 by bearing 13 supportings through driving-belt 36, it is affixed with small pulley 15 that the affixed small pulley 15 in big belt wheel 12 bottoms, the tooth axle 9 that is meshed with working gear dish 7 pass hollow central siphon 11.

3, by the described a kind of fixed shaft type automobile brake drum boring machine of claim 1, it is characterized by said clutch reducing gear is fixed on the tooth rest 19 by bidirectional clutch 17 and screw axis 42 and change gear axle, and the following double linked wheel 18 of engagement successively, middle duplicate gear 21, last duplicate gear 20 and final stage gear 22 compositions, following double linked wheel 18 links to each other with small pulley 15 through driving-belt 16.

4, by the described a kind of automobile brake drum boring machine of claim 1, it is characterized by motor 24 and be arranged on column 25 inside, the column 25 outer electric appliance control boxes that fuse with it that are concaved with.

5, by the described a kind of automobile brake drum boring machine of claim 1, it is characterized by clamping cantilever 31 ' with cross slide 31 be the monoblock cast structure.

6,, it is characterized by tooth rest 19 by bolt 19 ' the be fixed on bottom of support 8 by the described a kind of automobile brake drum boring machine of claim 1.

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