CN206200269U - Large travel high-speed electric threading machine - Google Patents

Abstract

A kind of large travel high-speed electric threading machine, clutch transmission case is set between the feed head and motor of headstock, one clutch rotating shaft and a power transmission shaft are erect be arranged in case side by side, it is connected with motor by belt wheel transmission in clutch rotating shaft, two electromagnetic clutch are respectively arranged on the upper and lower end of clutch rotating shaft, and armature of the first transfer belt wheel, commutation driving gear being slidably matched in clutch rotating shaft respectively with two electromagnetic clutch is connected；The second transfer belt wheel is fixed with power transmission shaft and commutation driven gear is engaged with commutation driving gear, headstock head end supports an inner spline housing, two driven pulleys on inner spline housing to be connected with first, second transfer belt wheel by transmission belt respectively；It is spline segment and inner spline housing spline fitted to be fed the main shaft epimere of head, and hypomere is that cylindrical section is slidably matched with stroke quill positioning, and stroke sleeve outer wall sets tooth bar and engaged with a gear shaft, and the switch shift fork that gear shaft is installed is corresponding with travel switch.

Description

Large travel high-speed electric threading machine

Technical field

The utility model is related to tapping machine field, more particularly to a kind of large travel high-speed electric threading machine.

Background technology

At present, the forward or reverse of the main shaft of common electric threading machine, is typically with reversing motor, by exchange Positive and negative the transferring of contactor or two-direction switch control reversing motor realizes that main shaft rotates, and reaches tapping or moves back the purpose of silk, by Can there is transient current increase, commutation inertial oscillation in the commutation process of forward and backward greatly in reversing motor, once motor Rotating speed is fast, will burning electric motor, therefore the tapping rotating speed of this electric threading machine generally not over 300 revs/min, its work It is less efficient, typically it is only suitable for smallclothes processing；And when aperture tapping is carried out, it is also easy to stall because vibration is big and causes screw tap Fracture, causes workpiece to be scrapped, therefore the stroke of tapping is short, and usual stroke is in 50mm or so.

Also have to be set on master spindle for tapping machine in addition and rotate forward friction cone pulley group and reverse friction cone pulley group, rotate forward friction cone pulley Group and reverse friction cone pulley group direction of rotation drive the transmission belt that a distortion is driven to realize by same motor, the rotation of motor wheel Turn that direction is constant all the time, friction cone pulley group is rotated forward by the extension spring control of the shift fork and feed crank rod assembly that are connected on main shaft Or reverse the inside and outside cone pulley of friction cone pulley group to combine or separate, realize the tapping machine of rotating forward or the reverse of main shaft.During work, turn Dynamic feeding crank rod assembly, drives shift fork main shaft is made feed motion downwards, and when screw tap props up workpiece, tapping axial force F is pushed away Dynamic main shaft makes the inside and outside cone pulley of reversion disengage and rotate forward inside and outside cone pulley and engage, and the change of main shaft direction of rotation is completed, so as to reach Tapping Function on General.At the end of tapping, crank is decontroled, in the presence of extension spring, empty set is in the rotating forward on main shaft in cone pulley and reversion Moved on cone pulley and main shaft is hung on workpiece by screw tap, be as a result exactly to rotate forward inside and outside cone pulley to disengage and invert inside and outside cone pulley engagement, Main shaft backwards rotation completes tool backlash movement.It is this to realize that forward and backward reaches the tapping machine of tapping purpose using the cone pulley group that rubs.And The parts of the main shaft portion of this type tapping machine are more, complex structure, also relative to cause the stabilization of shaft motion and smooth receive To certain influence.The precision that it has the disadvantage tapping is not high, and effect is slow, and stroke is short, and its tapping stroke typically only has 50mm, generally only It is adapted in one plane silk hole machined.

Due to screwed hole, especially tap deep holes of the hole depth more than 50mm are processed, and tapping stroke is big and between screwing speed is fast In the presence of long-term unsolved contradiction, how to realize that large travel high-speed tapping is processed, be always to be difficult to solve in tapping machine field Problem.

The content of the invention

The purpose of this utility model is directed to the difference of prior art presence, there is provided a kind of large travel high-speed electric threading Machine.It sets to be erect side by side in clutch transmission case, clutch transmission case between motor and feed head and sets clutch rotating shaft And power transmission shaft, electromagnetic clutch is respectively provided with clutch rotating shaft upper and lower side, keep the high speed in direction to rotate by motor Clutch rotating shaft rotation is driven, power is alternately transmitted by two electromagnetic clutch under control, respectively through respective drive path The positive and negative rotation direction of head spindle is controlled, and the stroke sleeve being slidably matched by axle positioning on the main shaft cylindrical section of feed head While main shaft is fed, band movable gear shaft is rotated, by the control handle and switch fork controls installed on steerage gear axle Travel switch, thus controls two electromagnetic clutch power on/off, makes head spindle realize rotating forward or reversely rotating, and completes tapping Or silk is moved back, realize the big stroke tapping in the case where high speed rotates.

What the purpose of this utility model was realized in：A kind of large travel high-speed electric threading machine, including with column and The support of workbench, installs headstock on column, the headstock head end installs feed head, and tail end installs motor, electronic To set erect side by side in clutch transmission case, clutch transmission case between machine and feed head and a clutch rotating shaft and a transmission are set Axle, the output pulley phase that circumferentially fixed driven total belt wheel is installed by total transmission belt with motor in the clutch rotating shaft Even, two electromagnetic clutch are arranged in clutch transmission case, and respectively positioned at the upper and lower end of clutch rotating shaft, two electromagnetism from The Moving plate of clutch with the circumferentially fixed connection of clutch rotating shaft, the equal empty set of armature of two electromagnetic clutch in clutch rotating shaft, Wherein, the armature of the first electromagnetic clutch is fixedly connected with the first transfer belt wheel being slidably matched in clutch rotating shaft, the second electricity The armature of magnet clutch is fixedly connected with the commutation driving gear being slidably matched in clutch rotating shaft, circumferentially solid on the power transmission shaft Surely there are commutation driven gear and the second transfer belt wheel, the commutation driven gear is engaged with commutation driving gear；The headstock head End is led to by the inner spline housing of bearings one, circumferentially fixed first, second driven pulley on the inner spline housing, the first driven pulley Cross the first transmission belt to be connected with the first transfer belt wheel, the second driven pulley is connected by the second transmission belt with the second transfer belt wheel； The main shaft epimere of one feed head is set to spline segment, and the length of the spline segment is fed distance more than tapping, the spline segment with it is interior Spline housing spline fitted, main shaft hypomere is set to cylindrical section, and axle positions be slidably matched one stroke sleeve, the stroke on the cylindrical section The axially disposed tooth bar of sleeve outer wall, the length of the tooth bar is fed distance more than tapping, the tooth bar be supported in headstock One gear shaft is engaged, and control handle and switch shift fork are installed on the gear shaft, is set on the switch shift fork and headstock Travel switch correspondence for controlling two electromagnetic clutch power on/off, for the conversion for touching travel switch control tapping, moving back silk.

The upper and lower ends of the stroke sleeve are respectively equipped with bearing locating slot, and stroke sleeve is positioned by installed in two bearings Bearing in groove is slidably matched with the cylindrical section of head spindle, and will by being respectively mounted upper and lower spring collar on cylindrical section The bearing axle of stroke sleeve upper and lower ends is positioned between upper and lower spring collar, forms head spindle cylindrical section and stroke sleeve Axle positioning be slidably matched.

The stroke sleeve upper surface is to the displacement stroke distance that stroke sleeve is left between inner spline housing lower surface, the position Shifting stroke distances are 180~200mm, and headstock lower end is provided with limited block.

The head spindle cylindrical section lower end is provided with the mohs tapered bore for installing tap chuck, and tap chuck uses band not The quick chuck of family name's taper.

The head spindle is multi-diameter shaft, the diameter of the diameter less than cylindrical section of head spindle spline segment, the length of spline segment Axial length of the degree more than inner spline housing.

The tapping rotating speed of the head spindle is not less than 700 revs/min, moves back a rotating speed and is not less than 800 revs/min.

The switch shift fork is fan-shaped or circular shift fork, and the switch shift fork is circumferentially located on gear shaft, by manipulating hand Handle pull switch shift fork is contacted with travel switch.

The headstock head end is provided with bearing block, and the bearing block is slided by upper bearing (metal) and lower bearing with inner spline housing matches somebody with somebody Close.

The first transfer belt wheel, commutation driving gear are slidably matched by bearing and clutch rotating shaft respectively.

The workbench is cross slid platform.

Advantage using such scheme is as follows：

1. set to be erect side by side in clutch transmission case, clutch transmission case between motor and feed head and a clutch is set Device rotating shaft and a power transmission shaft, circumferentially fixed driven total belt wheel is installed by total transmission belt with motor in the clutch rotating shaft Output pulley be connected, two electromagnetic clutch are arranged in clutch transmission case, and upper and lower positioned at clutch rotating shaft respectively End, two Moving plates of electromagnetic clutch with the circumferentially fixed connection of clutch rotating shaft, the equal empty set of armature of two electromagnetic clutch exists In clutch rotating shaft, wherein, the first transfer belt wheel being slidably matched on the armature of the first electromagnetic clutch and clutch rotating shaft is consolidated Fixed connection, the armature of the second electromagnetic clutch is fixedly connected with the commutation driving gear being slidably matched in clutch rotating shaft.It is described Commutation driven gear and the second transfer belt wheel are circumferentially fixed with power transmission shaft, the commutation driven gear is nibbled with commutation driving gear Close, the headstock head end is by the inner spline housing of bearings one, circumferentially fixed first, second driven belt on the inner spline housing Wheel, the first driven pulley is connected by the first transmission belt with the first transfer belt wheel, the second driven pulley pass through the second transmission belt and Second transfer belt wheel is connected.This structure can be by the motor power of high speed rotation, by two combinations of electromagnetic clutch Or separation realizes that power is alternately transmitted or interrupted, by power by the first transfer belt wheel, through the first transmission belt, the first driven pulley Inner spline housing rotation is driven, or by power by the driving gear that commutates, through driven gear, power transmission shaft, the second transfer band of commutating Wheel, the second transmission belt, the second driven pulley drive inner spline housing rotation, realize a power for single direction rotation motor output, The coaxial structure for alternately transmitting power respectively through two electromagnetic clutch in a clutch rotating shaft, and by the first transfer band Take turns the first driven pulley for driving and move back a rotary power to inner spline housing transmission, the driven through power transmission shaft by commutation driving gear Two driven pulleys transmit tapping rotary power to inner spline housing, realize commutation rotation, and the layout of its power drive mechanism is simple, moves Power transmission stabilization, solving the motor of prior art needs forward direction, is reversely alternately rotated and causes motor to be easily damaged, rotating speed Slow the problems such as, motor is remained a rotation direction high-speed motion, the rotating speed of tapping is improved, and thus improve work effect Rate.Meanwhile, also solve prior art and rotating forward friction cone pulley group is set on master spindle for tapping machine and friction cone pulley group is reversed, by same One motor realizes this type tapping machine of forward and reverse rotation, the main shaft portion for existing by the transmission belt of a distortion transmission Parts it is many, complex structure, the stability and smoothness of shaft motion is poor, and effect is slow, and stroke is short etc. is difficult to solve Problem, tapping stroke is far longer than common 50mm or so, realize aperture, deep hole large travel high-speed tapping processing.

2. the main shaft epimere that head is fed described in is set to spline segment, and the length of the spline segment is fed distance, institute more than tapping Spline segment and inner spline housing spline fitted are stated, main shaft hypomere is set to cylindrical section, axle positions the one stroke that is slidably matched on the cylindrical section Sleeve, the axially disposed tooth bar of stroke sleeve outer wall, the length of the tooth bar is fed distance, the tooth bar and branch more than tapping The gear shaft supportted in headstock is engaged, and control handle and switch shift fork, the switch shift fork and machine are installed on the gear shaft The correspondence of the travel switch for controlling two electromagnetic clutch power on/off set on headstock, attacks for touching travel switch control Silk, the conversion for moving back silk.Using this structure, enable main shaft that tapping rotation feed is realized under the drive of inner spline housing or silk is moved back Rotation, in the main shaft course of work, is oriented to due to constrained by same inner spline housing, under large travel high-speed rotation, can be all the time Axiality is kept, stabilization of retreating is greatly enhanced tapping precision.The effect of stroke sleeve upper rack is additionally, since, is given in main shaft Synchronously rotated by rack drives gear shaft during entering, after causing stroke to be covered, can be made open by operating control handle Close shift fork and touch the power on/off conversion that travel switch controls two electromagnetic clutch, so as to complete to attack the conversion moved back between silk, operate Simply, and will not cause main shaft offset vibration, machining accuracy is guaranteed.

The machining accuracy of this large travel high-speed electric threading machine can reach 0.008mm, and tapping rotating speed is up to 745 revs/min Clock, moves back a rotating speed up to 868 revs/min, tapping stroke distances up to 180~200mm, operating efficiency can reach attack one it is deep Spend for the screwed hole of 100mm or so is only needed 1.5 seconds, drastically increase processing efficiency, reduce production cost.

It is described further with accompanying drawing with reference to embodiments.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 is feed head sectional structure chart of the present utility model；

Fig. 3 is the A direction views of Fig. 2.

Specific embodiment

Referring to Fig. 1 to Fig. 3, a kind of embodiment of large travel high-speed electric threading machine, the large travel high-speed electric threading machine Including the support with column and workbench, headstock 4 is installed on the column 24 of support, the headstock 4 is arranged in crossbeam shape On column 24, headstock 4 can be arranged on column 24 by the way of fixation, it would however also be possible to employ controllable up-down mode peace On column 24, its controllable up-down mode using the conventional Standard for realizing elevating movement of lathe, so The working depth adjustment in the Z coordinate direction for different workpieces can be realized.The workbench（It is not shown）May be configured as ten Word slide unit, enables processed workpiece to realize that coordinate X, the quick of Y-direction are accurately moved horizontally by cross slid platform, and it is right to be easy to Porous workpiece carries out a hole tapping successively.The head end of the headstock 4 installs feed head, and tail end installs motor 19, electronic Set to be erect side by side in clutch transmission case 23, the clutch transmission case 23 between machine 19 and feed head and a clutch rotating shaft is set 14 and a power transmission shaft 12.The clutch rotating shaft 14, power transmission shaft 12 are slidably matched by bearing and clutch transmission case 23 respectively, from The phase of output pulley 18 that circumferentially fixed driven total belt wheel 16 is installed by total transmission belt 17 with motor 19 in clutch rotating shaft 14 Even, driven total belt wheel 16 is circumferentially fixed in the stage casing of clutch rotating shaft 14 by modes such as key, pin or interference fits.Two electromagnetism Clutch is arranged in clutch transmission case 23, and respectively positioned at the upper and lower end of clutch rotating shaft 14, two magnetic of electromagnetic clutch Yoke assembly is fixed on clutch transmission case, can be by being bolted directly on clutch transmission box body, also can be solid by bolt It is scheduled on the bearing set in clutch transmission case.The Moving plate of described two electromagnetic clutch with the circumferentially fixed company of clutch rotating shaft Connect, its circular fixation mode can use singly-bound or spline；The equal empty set of armature of two electromagnetic clutch is in clutch rotating shaft 14 On, wherein, the first transfer belt wheel 15 being slidably matched on the armature of the first electromagnetic clutch 13 and clutch rotating shaft 14 is by spiral shell Nail is fixedly connected, and the commutation driving gear 20 being slidably matched in the armature of the second electromagnetic clutch 21 and clutch rotating shaft 14 passes through Screw is fixedly connected, and the first transfer belt wheel 15, commutation driving gear 20 can respectively pass through the axis hole and clutch of itself Rotating shaft 14 is slidably matched, it is also possible to be slidably matched with clutch rotating shaft 14 by bearing, the first transfer belt wheel 15, commutation master Moving gear 20 is better with what clutch rotating shaft 14 was slidably matched by bearing respectively.Circumferentially it is fixed with the power transmission shaft 12 The commutation transfer belt wheel 11 of driven gear 22 and second, commutation driven gear 22 and second transfer belt wheel 11 passes through singly-bound or flower respectively Key is circumferentially fixed with power transmission shaft 12, can be also fixed on power transmission shaft using interference fit.The commutation driven gear 22 and commutation Driving gear 20 is engaged, and the head end of the headstock 4 is circumferentially fixed on the inner spline housing 25 by the inner spline housing 25 of bearings one First, second driven pulley, first driven pulley 7, the second driven pulley 6 connect solid with inner spline housing 25 by being bonded respectively It is fixed, wherein, the first driven pulley 7 is connected by the first transmission belt 10 with the first transfer belt wheel 15, and the second driven pulley 6 passes through the Two transmission belts 9 are connected with the second transfer belt wheel 11.The epimere of main shaft 8 of one feed head is set to spline segment, the length of the spline segment Distance, the spline segment and the spline fitted of inner spline housing 25 are fed more than tapping.The hypomere of the main shaft 8 is set to cylindrical section, the circle Axle positions the one stroke sleeve 26 that is slidably matched on shell of column.For ease of installing, the upper and lower ends of the stroke sleeve 26 are respectively equipped with Bearing locating slot, stroke sleeve 26 is slided by the bearing in two bearings locating slot with the cylindrical section of head spindle 8 matches somebody with somebody Close, and be positioned at the bearing axle of the upper and lower ends of stroke sleeve 26 by being respectively mounted on cylindrical section upper and lower spring collar, Between lower spring collar, form the cylindrical section of head spindle 8 and be slidably matched with the axle positioning of stroke sleeve 26.The stroke sleeve 26 The displacement stroke of stroke sleeve 26 is left apart from L in upper surface between the lower surface of inner spline housing 25, and the displacement stroke is apart from L 180~200mm, can guarantee that the feed range of tapping can at least reach 180 mm.And, the head spindle 8 is attacked Silk rotating speed is not less than 700 revs/min, moves back a rotating speed and is not less than 800 revs/min, the screwing speed of the present embodiment up to 745 turns/ Minute, a speed is moved back up to 868 revs/min, this speed is that existing tapping machine is beyond one's reach.The lower end of the headstock 4 Limited block is provided with, can be used to limit the excessive axial displacement of stroke sleeve 26.The axially disposed tooth bar of the outer wall of stroke sleeve 26, The length of the tooth bar is fed distance more than tapping, and the tooth bar is engaged with the gear shaft 27 for being supported in headstock 4, the gear Control handle 3 and switch shift fork 29 are installed in the one end of axle 27, and the other end installs return spring 30, and the return spring 30 uses butterfly-type bullet Spring is preferred, the travel switch 28 for controlling two electromagnetic clutch power on/off set on the switch shift fork 29 and headstock 4 Correspondence, for the conversion for touching the control of travel switch 28 tapping, moving back silk.The switch shift fork 29 is fan-shaped or circular shift fork, should Switch shift fork 29 is circumferentially located on gear shaft 27, can guarantee that switch shift fork is rotated under the drive of gear shaft 27, can be protected all the time Demonstrate,prove opposite with the travel switch 28 being arranged on headstock 4 corresponding, can be by manipulating manipulation hand after a feed stroke is completed Handle 3 promote gear shaft 27 axial movement switch shift fork 29 is touched travel switch 28, by travel switch 28 control an electromagnetism from Clutch is powered off, and another electromagnetic clutch is powered, and realizes tapping, moves back silk conversion and control each other, the letter of conversion and control process Single, convenience.

For ease of reducing the volume in the headstock 4 of crossbeam shape, reduce headstock with material and being easy to setting for inner spline housing Installation is put, the settable bearing block 5 of the head end of the headstock 4 of this tapping machine, the bearing block 5 is bolted on headstock The upper surface of 4 head ends, the bearing block 5 is slidably matched by upper bearing (metal) and lower bearing with inner spline housing 25, in its bearing block 5 Lower bearing can use thrust bearing, to ensure that the inner spline housing 25 being assemblied in bearing block 5 will not occur axially tenesmus displacement.

For ease of the assembling of head spindle 8, the head spindle 8 is multi-diameter shaft, and the diameter of head spindle spline segment is less than The diameter of cylindrical section, the axial length of the length more than inner spline housing of spline segment.Main shaft 8 so be can guarantee that during feed, All the time to ensure that and form spline fitted with inner spline housing 25, enable inner spline housing 25 to the transmitting torque of main shaft 8, drive main shaft Rotation.

Quick-replaceable for ease of tap chuck 2 is installed, and the head spindle is justified 8 shell of column lower ends and is provided with for installing screw tap The mohs tapered bore of chuck, tap chuck 2 uses the quick chuck with Morse's taper.By in machining apparatus compared with frequently with band The quick chuck of Morse's taper is assembled with mohs tapered bore and coordinated, it is possible to achieve just can complete screw tap specification more with 1~2 second Change, make replacing screw tap easier, quick.

This tapping machine by setting two electromagnetic clutch of the clutch rotating shaft upper and lower end in clutch transmission case, and A pair of commutation driving gears, commutation driven gear in clutch transmission case is set, and by a total belt mechanism and two points Belt mechanism, under the control of travel switch, the first electromagnetic clutch is in normally open to two electromagnetic clutch, for controlling System moves back silk work, and the second electromagnetic clutch is in normally off, by the control to travel switch, realizes two electromagnetic clutch Work conversion each other.Thus to a direction, rotation exports power at a high speed all the time only to need a motor, will not burn out Motor, it is ensured that application of the high-speed motor on tapping machine, can be achieved with tapping and moves back the positive direction rotation of silk, to complete The requirement of tapping.

During using the deep hole processing tapping of this tapping machine, startup power supply, electric motor operation, by total transmission belt, driven total band Wheel drive clutch rotating shaft rotation, lower the first electromagnetic clutch in normally open of travel switch control obtains electric first point of drive Movable belt pulley rotates, and the first transfer belt wheel drives the main shaft into head to make by the first transmission belt, the first driven pulley, inner spline housing Rotate forward, now screw tap is in and moves back a rotation status, does not result in the damage to workpiece；Then manipulate control handle and allow switch Shift fork touches travel switch, powers off the first electromagnetic clutch, and the second electromagnetic clutch obtains electric drive commutation driving gear rotation, Commutation driving gear is by the driven gear that commutates, power transmission shaft, the second transfer belt wheel, the second transmission belt, the second driven pulley, interior flower Key set drives the main shaft into head to reversely rotate, and screw tap is in tapping rotation status, then manipulates control handle to feed side To rotation, stroke sleeve is driven to move down by gear shaft, stroke sleeve drives main shaft to be transported downwards under tapping rotation status Dynamic to carry out tapping processing to workpiece, as long as screw tap is into after carrying out tapping in workpiece hole, operating personnel can no longer to manipulation hand Handle is exerted a force, and main shaft automatic feed is driven by screw tap；When tapping reaches depth requirements, quick chuck is in the mohs tapered bore of main shaft Skid, control handle now manipulated again and allows switch shift fork to touch travel switch, travel switch powers off the second electromagnetic clutch, First electromagnetic clutch obtains electric, makes screw tap recover to move back a rotation status, and silk is moved back in realization, completes a tapping operation for screwed hole.

In practice, tapping processing is carried out to the screwed hole of hole depth 100mm or so using this tapping machine, tapping rotating speed is , a rotating speed is moved back for 868 revs/min, a tapping machine per tour at least can 3600 screwed holes of tapping, machining accuracy by 745 revs/min 0.008mm is reached, considerably beyond the operating efficiency of existing electric threading machine.

Claims (9)

1. a kind of large travel high-speed electric threading machine, including the support with column and workbench, installs headstock on column, its It is characterised by：The headstock head end installs feed head, and tail end installs motor, set between motor and feed head from Close to be erect side by side in transmission case, clutch transmission case and a clutch rotating shaft and a power transmission shaft are set, it is circumferential in the clutch rotating shaft The output pulley that fixed driven total belt wheel is installed by total transmission belt with motor is connected, two electromagnetic clutch be arranged on from Close in transmission case, and respectively positioned at the upper and lower end of clutch rotating shaft, two Moving plates of electromagnetic clutch are all with clutch rotating shaft To being fixedly connected, the equal empty set of armature of two electromagnetic clutch in clutch rotating shaft, wherein, the armature of the first electromagnetic clutch with The first transfer belt wheel being slidably matched in clutch rotating shaft is fixedly connected, on the armature of the second electromagnetic clutch and clutch rotating shaft The commutation driving gear being slidably matched is fixedly connected；Commutation driven gear and the second transfer band are circumferentially fixed with the power transmission shaft Wheel, the commutation driven gear is engaged with commutation driving gear, and the headstock head end is by the inner spline housing of bearings one, and this is interior Circumferentially fixed first, second driven pulley on spline housing, the first driven pulley passes through the first transmission belt and the first transfer belt wheel phase Even, the second driven pulley is connected by the second transmission belt with the second transfer belt wheel；The main shaft epimere of one feed head is set to spline Section, the length of the spline segment is fed distance, the spline segment and inner spline housing spline fitted more than tapping, and main shaft hypomere is set to circle Shell of column, axle positions be slidably matched one stroke sleeve, the axially disposed tooth bar of stroke sleeve outer wall, the tooth on the cylindrical section The length of bar is fed distance more than tapping, and the tooth bar is engaged with the gear shaft for being supported in headstock, is installed on the gear shaft Control handle and switch shift fork, the row for controlling two electromagnetic clutch power on/off set on the switch shift fork and headstock Cheng Kaiguan correspondences, for the conversion for touching travel switch control tapping, moving back silk.

2. large travel high-speed electric threading machine according to claim 1, it is characterised in that：Up and down the two of the stroke sleeve End is respectively equipped with bearing locating slot, and stroke sleeve is by the bearing in two bearings locating slot and the cylindrical section of head spindle It is slidably matched, and is positioned the bearing axle of stroke sleeve upper and lower ends by being respectively mounted upper and lower spring collar on cylindrical section Between upper and lower spring collar, form head spindle cylindrical section and be slidably matched with the axle positioning of stroke sleeve.

3. large travel high-speed electric threading machine according to claim 1, it is characterised in that：The stroke sleeve upper surface is extremely The displacement stroke distance of stroke sleeve is left between inner spline housing lower surface, displacement stroke distance is 180~200mm, head Seat lower end is provided with limited block.

4. large travel high-speed electric threading machine according to claim 1, it is characterised in that：Under the head spindle cylindrical section End is provided with the mohs tapered bore for installing tap chuck, and tap chuck uses the quick chuck with Morse's taper.

5. large travel high-speed electric threading machine according to claim 1, it is characterised in that：The head spindle is ladder Axle, the diameter of the diameter less than cylindrical section of head spindle spline segment, the axial length of the length more than inner spline housing of spline segment.

6. large travel high-speed electric threading machine according to claim 1, it is characterised in that：The switch shift fork for fan-shaped or Circular shift fork, the switch shift fork is circumferentially located on gear shaft, is contacted with travel switch by control handle pull switch shift fork.

7. large travel high-speed electric threading machine according to claim 1, it is characterised in that：The headstock head end is provided with axle Bearing, the bearing block is slidably matched by upper bearing (metal) and lower bearing with inner spline housing.

8. large travel high-speed electric threading machine according to claim 1, it is characterised in that：The first transfer belt wheel, change It is slidably matched with clutch rotating shaft by bearing respectively to driving gear.

9. large travel high-speed electric threading machine according to claim 1, it is characterised in that：The workbench is slided for cross Platform.