CN1086970C

CN1086970C - Reversal mechanism for tapping arrangement

Info

Publication number: CN1086970C
Application number: CN96122132A
Authority: CN
Inventors: 卢才美
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-18
Filing date: 1996-11-18
Publication date: 2002-07-03
Anticipated expiration: 2016-11-18
Also published as: CN1182659A

Abstract

The present invention relates to a positive and reverse conversion mechanism of a drill press or an electric drill tapping device. Conversion rings are respectively arranged on extension bodies of a positive rotation moving piece and a reverse rotation moving piece, and the jointing positions of the conversion rings are provided with one or more than one lateral plane surface, or one groove, or one concave hole. A slide sleeve and a slide block arranged in a pipe wall hole of the slide sleeve are arranged on the periphery to form a device for transferring torque. The original axial movement end surface contact conversion is changed into lateral slide block slide reversion. The length of a force arm of a member is fully used, and the larger torque can be transferred, and the large screw threads can be tapped and cut. The partial process in work needs slight manual operation, and the labor intensity is effectively lightened. The present invention has the advantages of little impact and little noise, and the tapping performance is improved.

Description

The rotating changement of chasing bar

Particularly bench drill, the supporting use of hand held electric drill or make the rotating changement of chasing bar that one is made the usefulness of tapping internal thread of the electric tool that the present invention relates to a kind of and drilling machine (comprise and do not have the simple and easy drilling machine that slows down) or output shaft arranged.

With screw tap tapping screw thread, must and commutate by rotating to finish advance and retreat work, for this reason, bore, attack dual-purpose bench drill if adopt, very easily damage motor, electric elements by the frequent of motor along commutation, usefulness does not sound feasible.Application number is 91224068.7, notification number is that silk is moved back in Chinese patent application " reversing thread tapper automatically " middle employing frictional drive tapping and the gear drive of CN2107965U, when entering gears engaged, or when withdrawing from gears engaged, all will inevitably produce stronger mechanical impact, even when reaching certain rotating speed, be difficult to enter gears engaged, obviously, this duty, not only diminish machine components, also will improve operating noise, in addition, utilize end-face friction transmission or end face toe joint to touch transmission and carry out tapping, it is manually-operated power that whole process must be kept bigger axial compressive force, the required moment of torsion of transmission tapping is restricted, second operation effort in the overall process of tapping.

Publish in China Machine Press, in October, 1978 Beijing front page, standard book number is in " principle of common mechanism and application " book 98-99 page or leaf of 15033.4464, to provide a kind of tapping anchor clamps, and its commutation is to snap in finger by moving on the lateral pin, move down that the block that snaps on the central gear realizes commutating, because it is single that lateral pin can only use, and diameter is less, and the arm of force is short, gross contact area is little, can not transmit than high pulling torque.By being inverted to stall, bigger speed discrepancy is arranged all during commutation, produce inevitably bump again to just changeing.Trace it to its cause, this exactly positive and negative rotational mechanism with the end face kind of drive fails to provide desirable changement.

The purpose of this invention is to provide a kind of can the transmission than high pulling torque, can tapping than major diameter screw thread, rapid operation, bump is light, noise is little, with the rotating changement of side commutation.

For realizing this purpose, on rotating movement parts ennation concentrically with respect to one another, a commutative ring is set respectively, ennation and commutative ring separately can be integral, also can dress up one, these two commutative ring external diameters are identical or close, and adjacency up and down, in the suitable axial length in the cylindrical side place of both adjacency, respectively be provided with in order to transmit the one or more side plane of moment of torsion, perhaps groove, perhaps shrinkage pool, perhaps optional its combination of two in them, being peripherally equipped with of commutative ring one becomes one with the tapping auger spindle or dresses up the sliding sleeve of one, has one or more on the sliding sleeve tube wall corresponding to above-mentioned side plane or groove or shrinkage pool, can be in order to hold the hole of slide block, slide block is under the drive of sliding sleeve, can slippage between above-mentioned side plane or groove or shrinkage pool, transmit the rotating campaign respectively, sliding sleeve and slide block be peripherally equipped with a back-up ring of holding slide block in order to retaining.

In order to protect screw tap, the flat spring of holding a slide block and an overload protective function in order to retaining also can be installed in the outside of slide block.Flat spring is peripherally equipped with one can the adjustable plate spring rate and the nut of initial pressure.

The inclined-plane cover of holding a slide block and an overload protective function in order to retaining also can be installed in the outside of slide block, and the inclined-plane puts to be equipped with can regulate annular elastomeric and the nut of inclined-plane cover to the slide block initial pressure.

The above-mentioned shrinkage pool that is divided on the forward and backward commutative ring, between them, have the axial slide that appropriate depth can supply slide block to slide up and down, have the horizontal dead slot that plays the commutation transitional function that appropriate depth can supply the full girth of slide block to slide at forward and backward commutative ring abutment place, the both sides of dead slot also can be provided with step, make sliding sleeve produce certain pre-rotary speed.

Above-mentioned slide block can adopt steel ball, also can be the cylinder or the multiple edge body of one or both ends chamfering or rounding.

Side surface at commutative ring is provided with changement, has made full use of its arm of force number and arm of force length, thereby can transfer larger torque, and identical moment of torsion only needs less action force, so reliable operation, long service life can the larger-diameter screw thread of tapping.Because of side plane or groove are axial, promptly in certain-length, can both transmit moment of torsion, not need axial compressive force, promptly not need or reduced operating physical force, the slippage of invar ball is in conjunction with being better than the slippage combination of any object, in conjunction with the time guidance quality good, operating physical force is little, bump is little, noise is little.Step is set in dead slot, makes for example steel ball elder generation contact step of slide block, can produce certain frictional force, make steel ball and sliding sleeve produce certain prerotation, thereby reduce the speed discrepancy when commutating, make easy commutation.

The invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is the vertical section schematic diagram of the rotating changement of chasing bar.

Fig. 2 is the elastic inclined-plane of a chasing bar cover overload protection arrangement schematic diagram.

Fig. 3 has flat spring overload protection arrangement schematic diagram for chasing bar.

Fig. 4 is the side plane schematic diagram of chasing bar commutative ring.

Fig. 5 is an axial slide schematic diagram between the concave hole.

As shown in Figure 1, planet carrier is for just transporting moving part, sun gear is the return motion part, about movement parts and ennation concrete structure, please see my utility model patent " positive and negative rotational mechanism of chasing bar " of application on the same day for details, they have

ennation

1,2 separately, a commutative ring 3A, 4A respectively are equipped with in the lower end of each ennation,

ennation

1,2 and separately commutative ring 3A, 4A can be made into one, also can be divided into many and install and fix again, fix with screw 11A with its commutative ring 4A as sun gear ennation 2.Two commutative ring 3A, 4A forms neighbouring in the bottom of chasing bar, the cylindrical outer side surface that external diameter is identical or close, respectively make on the cylindrical outer side surface in the suitable axial length of adjoiner in order to transmit the circumferential uniform one or more shrinkage pool 9A in correspondence with each other of moment of torsion, 10A, two commutative ring 3A, the periphery of 4A be equipped with one heart one and tapping axle 13A become one or dress up the sliding sleeve 5A of one, on sliding sleeve 5A tube wall, have in order to hold the hole of slide block 8A (being steel ball) herein, this hole is corresponding to above-mentioned shrinkage pool 9A or shrinkage pool 10A, the periphery of sliding sleeve 5A is equipped with a lasso 7A with one heart, place the slide block 8A in hole, radially be between shrinkage pool 9A or shrinkage pool 10A and the lasso 7A, handled by moving up and down of sliding sleeve 5A, during work, Handl eof drill press or electric tool shell (hereinafter to be referred as drilling tool) are pushed away downwards, make screw tap withstand workpiece, this moment, sliding sleeve 5A moved on relatively, slide block 8A is brought among the shrinkage pool 9A, so sliding sleeve 5A drives through slide block 8A, make tapping axle 13A rotation, screw tap 18 is shot workpiece, after waiting to shoot the 1-2 circle, just can reduce thrust, as long as flicking drilling tool, screw tap 18 is attacked under promptly continuing, when attacking to desired depth, to carry on the drilling tool, still stay in workpiece because of screw tap 18 this moment, then sliding sleeve 5A moves down relatively, and slide block 8A brought among the shrinkage pool 10A, so sliding sleeve 5A is driven by the slide block 8A on the commutative ring 4A, makes tapping axle 13A reversed turning, withdraws from screw tap 18 from workpiece, after counter motion begins, can utilize its lifting spring to promote chasing bar automatically to drilling machine, in this course, utilize the deadweight of chasing bar, make slide block 8A can not break away from shrinkage pool 10A, until finishing whole counter motion.

As shown in Figure 5, for improving slide block 8A slippage flexibility in the commutation process, between shrinkage pool 9A and shrinkage pool 10A, be provided with and make the

axial slide

17A and 36 that communicates with each other.

To commutative ring 3A, 4A adjoiner wedge angle position roll extrusion fluffing, can all process the chamfering 12 of suitable size for fear of slide block 8A in commutation process at this sharp corner.Lasso 7A can be fixed on the sliding sleeve 5A with screw 6A.Screw 6A also can be to the position-limiting action that moved down of sliding sleeve 5A.This chasing bar needs certain axial pressing force as connecting by taper hole, and this power can be imported into by tapping axle 13A or hole 16.On tapping axle 13A, can make the square hole 14A that several and various screw tap 18 match, be used for installing screw tap 18, and fastening with several screws 15.

As shown in Figure 2; in order at work screw tap 18 to be protected; this chasing bar has been set up overload protection arrangement; promptly overlap the elastomer 23 and the nut 22 of 7B, annular on slide block 8B arranged outside inclined-plane; nut 22 can be adjusted the height of elastomer 23, just can regulate the rigidity of inclined-plane cover 7B to initial pressure and the elastomer 23 of slide block 8B.When overload, slide block 8B outward thrust just increases, and promotes inclined-plane cover 7B, makes its elastomer 23 1 side shiftings to annular, and slide block 8B then skids off groove 9B or 10B, does not transmit moment of torsion, makes sliding sleeve 5B stall, plays a protective role.Sliding sleeve 5B is provided with the moved down position-limiting action of screw 6B to sliding sleeve.In this device, offered groove 9B, 10B on commutative ring 3B, 4B, its slide block 8B is the multiple edge body of one or both ends chamfering or rounding.In order to make slide block 8B slippage flexible, can offer the horizontal dead slot 19B that plays the commutation transitional function that appropriate depth can supply the full girth of slide block 8B to slide at commutative ring 3B, 4B abutment place.Tapping axle 13B can be welded into weld seam 28B with sliding sleeve 5B or be formed by connecting with other interference, and the one end can be made into the short awl supporting with drill chuck, and the other end can stretch in the counter-rotating ennation 2, and slidably or again locatees with bearing 27B.In order to make precision positioning between commutative ring 3B and ennation 2 and the commutative ring 4B, to rotate flexibly, the gap is little, and steel ball 29 can be set.Sliding sleeve 5B for the commutative ring 4B contact friction that reduces and eliminate and reverse, can be provided with steel ball 20, pad 21, the boss 26 of sliding sleeve 5B and the convex shoulder 25 of commutative ring 4B when just changeing tapping, also can improve the centering precision of tapping axle 13B simultaneously.Ennation 1 can be made one with commutative ring 3B or be welded into one with weld seam 24.

As shown in Figure 3; arranged outside elastic protection device at slide block 8C; flexible member is flat spring 7C; the bending of one end; with nut seat 39 location; the bottom of nut seat 39 has the breach with corresponding size of flat spring 7C width and respective numbers; make flat spring 7C be in the slide block 8C outside and retaining is held slide block 8C; one end of its bending also can be to the position-limiting action that moved down of sliding sleeve 5C; in order to avoid skid off the precalculated position; nut seat 39 usefulness screws 40 are fixed on the sliding sleeve 5C, utilize rigidity and the initial pressure of nut 30 adjusting plate spring 7C.Just turning over when carrying; the radial component that groove 9B contacts with slide block 8C increases; make slide block 8C back down flat spring 7C and skid off groove 9B; can not continue to transmit motion; play the safeguard protection effect, counter-rotating is transshipped also in like manner, and this slide block is the cylinder of one or both ends chamfering or rounding; corresponding with it is groove 9B and shrinkage pool 10A, also other combination.For lubricating oil is run off sealing ring 34 can be set on steel ball 29, can set up pad 35 between the two, also make lubricating oil enter bearing 27C simultaneously by hole 33,13C is lubricated to the tapping axle, in tapping axle 13C inside plurality of square holes 14C can be set, it and sliding sleeve 5C can be integrally welded with weld seam 28C.

The circumferentially

continuous boss

31,32 that fuses with

commutative ring

3C, 4C also can be set in dead slot 19C, just changing to the time slide block 8C contact the certain frictional force of generation earlier with boss 31, driving slide block 8C and sliding sleeve 5C rotates, and can produce certain rotating speed, speed discrepancy when reducing to commutate, inverse transform is to also in like manner.

As shown in Figure 4, above-mentioned

shrinkage pool

9A, 10A, all available side plane 37 of groove 9B, 10B replaces, and the face number of side plane 37 can reach the 6-10 face.

Claims

1, particularly bench drill or the supporting use of hand held electric drill or make the rotating changement of the chasing bar of one of a kind of and drilling machine or electric tool that output shaft arranged, comprise and just transport moving part and return motion part, and ennation concentrically with respect to one another [1] separately, [2], it is characterized in that in two ennations [1], [2] a commutative ring [3A respectively is set, 3B, 3C], [4A, 4B, 4C], ennation [1] and commutative ring [3A, 3B, 3C] and ennation [2] and commutative ring [4A, 4B, 4C] may be made in one, also can dress up one, these two commutative ring [3A, 3B, 3C], [4A, 4B, 4C] external diameter is identical or close, and adjacency up and down, in the suitable axial length in the cylindrical side place of both adjacency, respectively be provided with in order to transmit the one or more side plane [37] in correspondence with each other of moment of torsion, perhaps groove [9B, 10B], perhaps shrinkage pool [9A, 10A], perhaps optional its combination of two in them, commutative ring [3A, 3B, 3C], [4A, 4B, 4C] the periphery be equipped with one heart one with tapping axle [13A, 13B, 13C] become one or dress up the sliding sleeve [5A of one, 5B, 5C], sliding sleeve [5A, 5B, 5C] having one or more on the tube wall can be in order to hold slide block [8A, 8B, 8C] the hole, this hole is corresponding to above-mentioned side plane [37] or groove [9B, 10B] or shrinkage pool [9A, 10A], slide block [8A, 8B, 8C] at sliding sleeve [5A, 5B, 5C] drive under, can be at above-mentioned side plane [37] or groove [9B, 10B] or shrinkage pool [9A, 10A] between slippage, transmit the rotating campaign respectively, sliding sleeve [5A, 5B, 5C] and slide block [8A, 8B, 8C] be peripherally equipped with one and hold slide block [8A in order to retaining, 8B, 8C] back-up ring [7A].

2; the rotating changement of chasing bar according to claim 1; it is characterized in that at slide block [8A; 8B; 8C] the outside can install in order to retaining and hold slide block [8A; 8B; 8C] and play the flat spring [7C] of overload protective function; flat spring [7C] is peripherally equipped with the nut [31] that can regulate leaf spring [7C] rigidity and initial pressure; or at slide block [8A; 8B; 8C] the outside can install in order to retaining and hold slide block [8A; 8B; 8C] and play the inclined-plane cover [7B] of overload protective function, be equipped with on the inclined-plane cover [7B] and can regulate inclined-plane cover [7B] slide block [8A; 8B; 8C] elastomer [23] and the nut [22] of annular of initial pressure.

3, the rotating changement of chasing bar according to claim 1 and 2 is characterized in that having at rotating commutative ring [3A, 3B, 3C], [4A, 4B, 4C] abutment place the horizontal dead slot [19B] that plays the commutation transitional function that appropriate depth can supply the full girth of slide block [8A, 8B, 8C] to slide.

4, the rotating changement of chasing bar according to claim 1 and 2 is characterized in that slide block [8A, 8B, 8C] can adopt steel ball, also can be the cylinder or the multiple edge body of one or both ends chamfering or rounding.

5, the rotating changement of chasing bar according to claim 3 is characterized in that slide block [8A, 8B, 8C] can adopt steel ball, also can be the cylinder or the multiple edge body of one or both ends chamfering or rounding.

6, the rotating changement of chasing bar according to claim 3 is characterized in that on said dead slot [19B] both sides step [31,32] being set also.

7, the rotating changement of chasing bar according to claim 5 is characterized in that said dead slot [19B] both sides also can be provided with step [31,32].