CN204686550U - A kind of compressive overload protective device - Google Patents
A kind of compressive overload protective device Download PDFInfo
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- CN204686550U CN204686550U CN201520322721.4U CN201520322721U CN204686550U CN 204686550 U CN204686550 U CN 204686550U CN 201520322721 U CN201520322721 U CN 201520322721U CN 204686550 U CN204686550 U CN 204686550U
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- drill holder
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Abstract
The utility model discloses a kind of compressive overload protective device, comprise fixture cover, adjusting nut, steel ball, power transmission cover, drill holder, Compress Spring and centering assembly, wherein, fixture cover is tubular structure, the left end inwall of fixture cover offers internal thread, and the inner thread that adjusting nut overlaps with fixture is connected; The right side of adjusting nut is provided with power transmission cover, and Compress Spring is arranged between adjusting nut and power transmission cover, and the end face of adjusting nut and power transmission cover is withstood at the two ends of adjusting nut respectively; Steel ball embed power transmission cover guide groove in so that radial spacing power transmission cover, the top of steel ball snap in be opened in fixture cover wall body on through hole in so that spacing stationary balls; Drill holder is adjacent to the right side that power transmission is set on power transmission cover, is provided with centering assembly in drill holder, and screw tap inwardly inserts in power transmission cover through centering assembly.The utility model adopts binodal structure, and is combined with rigidity overcurrent protection structure by elasticity overcurrent protection structure, achieves axial direction overload protection and radial overload protection simultaneously.
Description
Technical field
The utility model relates to threading drill bit field, refers in particular to a kind of compressive overload protective device.
Background technology
Boring and tapping is commonly used in mechanical processing process; boring refers to processes the operation of portalling with drill bit on solid material; tapping to be screwed in by screw tap in the bottom outlet that will bore with certain moment of torsion to process internal thread; boring and tapping need to drive drill bit and screw tap High Rotation Speed respectively; the torque axis of rotating shaft to be changed to the driving force of boring and tapping downwards; drill bit and screw tap are separately fixed on chuck; its High Rotation Speed is driven by chuck; drill bit and the screw tap of High Rotation Speed need overload protection arrangement, fracture to prevent overload excessive or moment of torsion excessive and twist into two parts.
Authorization Notice No. is that the Chinese utility model patent of CN 2504024Y discloses " tap holder ", this publication disclose a kind of by arranging the tap chuck 1 that a kind of opening part is inverted cone surface structure, steel ball 6, tap chuck 7 and Compress Spring 8 are to realize the assembling and positioning of screw tap, during assembling, tap chuck 7 is inwardly pressed, and Compress Spring 8 is compressed, the conical surface of inboard wall groove that steel ball 6 slips into tap chuck 1 is interior to insert screw tap, after screw tap has assembled, unclamp tap chuck 7, Compress Spring 8 resilience, steel ball 6 is progressively ejected the conical surface of inboard wall groove of tap chuck 1, to lock screw tap, the outer cover of tap chuck 1 is provided with chuck overcoat 2, chuck overcoat 2 inwall is provided with groove, be provided with housing pin 5, spring 4 and steel ball 3 from outside to inside according to this in this groove, steel ball 3 is embedded in tap chuck 1, and spring 4 is withstood steel ball 3 and compressed by housing pin 5, to provide preload force to steel ball 3, when the moment of torsion of screw tap is greater than this preload force, steel ball 3 outwards presses to housing pin, and skids off outside tap chuck 1, rotation was lost efficacy, realizes overload protection.This patented technology only plays radial overload protective function when reality uses, owing to needing when screw tap works to move downward and rotate simultaneously, therefore screw tap is subject to moment of torsion along the circumferential direction and pressure vertically simultaneously, and moment of torsion is much larger than pressure, in this patented technology by the connection of steel ball 3 and the arc groove on tap chuck 1 outer wall to carry out overload protection, due to steel ball 3 and arc groove radial direction and axially contact unanimously, therefore its radial preload force is equal with axial preload force, the axial compressive force that the radial moment of torsion born due to screw tap bears much larger than it, therefore screw tap makes motion failures because radial load is excessive, but machining center can continue feeding vertically, screw tap axial force is caused progressively to increase and cause fractureing, in addition, this patented technology adopts spring to provide preload force, spring belongs to elastic construction, Repeated Compression easily causes damaging, service life is short, poor stability.
Utility model content
The technical problems to be solved in the utility model is for above-mentioned the deficiencies in the prior art; there is provided a kind of and adopt binodal structure; and elasticity overcurrent protection structure is combined with rigidity overcurrent protection structure, achieve the compressive overload protective device of axial direction overload protection and radial overload protection simultaneously.
The technical scheme that the utility model is taked is as follows: a kind of compressive overload protective device, comprise fixture cover, adjusting nut, steel ball, power transmission cover, drill holder, Compress Spring and centering assembly, wherein, above-mentioned fixture cover is tubular structure, the left end inwall of fixture cover offers internal thread, and the inner thread that adjusting nut overlaps with fixture is connected; The right side of adjusting nut is provided with power transmission cover, and Compress Spring is arranged between adjusting nut and power transmission cover, and the end face of adjusting nut and power transmission cover is withstood at the two ends of adjusting nut respectively; Above-mentioned steel ball embeds in the guide groove of power transmission cover, so that radial spacing power transmission cover, the top of steel ball snaps in the through hole that is opened on fixture cover wall body, so that spacing stationary balls; Above-mentioned drill holder is adjacent to the right side that power transmission is set on power transmission cover, is provided with centering assembly in drill holder, and screw tap inwardly inserts in power transmission cover through centering assembly.
Preferably, plug in the left end of described fixture cover and be fixed with main body power transmission pin, main body power transmission pin external connection power device, to drive fixture cover to rotate and axially-movable by main body power transmission pin.
Preferably, described power transmission cover is tubular structure, left side fluting in the cylinder of power transmission cover, and right side has square hole, and square hole is communicated with groove, and the width of square hole is less than the diameter of groove, forms the step surface of annular between groove and square hole; The right-hand member of above-mentioned Compress Spring withstands the step anchor ring of this annular, and left end withstands the right side of adjusting nut; Screw tap plugs and is fixed in square hole.
Preferably, the left end of described power transmission cover is provided with the first bulge loop, and right-hand member is provided with the second bulge loop, forms annular dead slot between the first bulge loop and the first bulge loop; Above-mentioned guide groove comprises at least two, and guide groove is opened on the first bulge loop, and arranges along the circumferencial direction interval of the first bulge loop.
Preferably, described guide groove runs through the left and right end face of the first bulge loop, and right-hand member two trough rim of guide groove is respectively arc structure; Above-mentioned steel ball comprises at least two, and each steel ball is embedded in guide groove respectively, and corresponding above-mentioned arc structure is arranged, and fixture cover drives power transmission cover to rotate by steel ball, and drives screw tap to rotate by square hole.
Preferably, described drill holder is tubular structure, and the left end of drill holder is adjacent to the end face of power transmission cover, and the inwall of drill holder is intilted cone structure, and the diameter of this cone structure progressively increases from right to left.
Preferably, described centering assembly comprises centering ball, centring sleeve and spring, and wherein above-mentioned spring is arranged in drill holder, and the left end of spring withstands the interior step anchor ring of drill holder; Above-mentioned centring sleeve is plugged in drill holder, and centring sleeve withstands spring, and extends to outside drill holder.
Preferably, the sidewall of described centring sleeve offers draw-in groove, the cone structure of the corresponding above-mentioned drill holder of this draw-in groove is arranged; Above-mentioned centering ball is fastened in this draw-in groove, inside pressing centring sleeve centering ball moves along cone structure, progressively to slip in cone structure and by spring compression, to install screw tap, install the bounce-back of screw tap rear spring centring sleeve is extrapolated, centering ball skids off cone structure, and is stuck in the right-hand member of cone structure, so that by centring sleeve and screw tap clamping.
Preferably, described drill holder is fixed by screws in above-mentioned fixture and puts, and rotates with fixture cover.
Preferably, the outer end of described steel ball is fastened in main body endoporus.
The beneficial effects of the utility model are:
Needed for the defect that the utility model exists for tapping, the existing overload protection arrangement in boring field and industry; devise a kind of employing binodal structure; and elasticity overcurrent protection structure and rigidity overload protection are combined, to realize radial overload protection and the axial direction overload protection of screw tap or drill bit simultaneously.
First, the utility model by fixture cover in arrange mutually be adjacent to setting power transmission cover and drill holder to replace the structure of tap chuck of the prior art and Compress Spring, with axial protective effect subsidiary on the basis realizing quick assembling screw tap, drill holder inside is arranged interior annular step surface structure by the utility model, drill holder inwall is intilted cone structure, and spring is set on this interior step anchor ring, the outer end of spring is connected on centring sleeve, centring sleeve outer wall is embedded with centering ball, during assembling, centring sleeve is pressed to the inside, centering ball progressively slips in the groove of the cone structure of drill holder, screw tap is inwardly inserted in the square opening of power transmission cover, to be fixed, after screw tap has assembled, unclamp centring sleeve, recoil of spring promotion steel ball slides laterally along the groove of cone structure, to clamp screw tap, Compress Spring is provided with in power transmission cover, Compress Spring Inner end withstands the step anchor ring of annular in power transmission cover, adjusting nut is withstood in outer end, adjusting nut and fixture overlap between inwall and are threaded, adjusting nut compresses Compress Spring to the right, and power transmission cover is adjacent to drill holder, and the right-hand member of drill holder and fixture overlap to clamp and arrange, therefore Compress Spring is pre-compressed, and produces an axial direction overload protection power,
Secondly, the utility model creates a kind of brand-new power transmission cover, the two ends of this power transmission cover are respectively equipped with the first bulge loop and the second bulge loop, annular dead slot is formed between first bulge loop and the second bulge loop, first bulge loop has three guide grooves axially arranged, three guide grooves are arranged along the periphery uniform intervals of the first bulge loop, and by through for the first bulge loop, two trough rims of guide groove right-hand member are set to arc structure respectively, steel ball is provided with in guide groove, steel ball correspondence is arranged on arc structure place, steel ball embeds in the through hole of fixture cover sidewall, and overlap outside main body endoporus with fixture and clamp and arrange, steel ball is radial force transmission element, the main body power transmission pin that fixture puts drives fixture cover to rotate, fixture cover drives power transmission cover to rotate by steel ball, power transmission cover is turned by the square hole resulting belt movable wire coning that it is arranged, particularly, the radial mode of transfer force of steel ball adopts two cambered surface contact structures, namely the sphere of steel ball is adjacent to the arc structure on guide groove sidewall, radial load to be passed to power transmission cover, during actual use, if when the arc structure that the radial load that screw tap bears is greater than guide groove can be supplied to the maximum support power of steel ball, steel ball slips in annular dead slot along arc structure, make radial transmission failure, power transmission cover skids, achieve radial overload protective function, this steel ball and arc structure be combined into rigidity overcurrent protection structure, relative to elasticity overcurrent protection structures such as employing springs, its connection is more stable, long service life, and, larger compared to the overload protection power of the overcurrent protection structures such as the irregular broached-tooth design that market occurs, screw tap intensity is difficult to the defect reaching the requirement of overload protection power, the type of attachment that this kind of sphere contacts with globoidal structure, greatly decrease overload protection power, adapt to actual user demand.
Power transmission cover of the present utility model axially can be free to slide in fixture cover, during assembling, pass through rotating adjusting nut, Compress Spring is made to press to power transmission cover to the right, power transmission cover is made to be adjacent to drill holder, and drill holder is axially fixed in fixture cover, therefore constantly rotating adjusting nut makes Compress Spring progressively compress power transmission cover, and produces an axial pre-pressing force, steel ball of the present utility model is fixedly installed in fixture cover and main body endoporus, steel ball is axially inoperative, during actual use, comprise following two kinds of situations: 1, the axial force of screw tap first reaches the loading force that Compress Spring provides in advance, then power transmission cover extrudes to the left by screw tap under responsive to axial force, power transmission cover moves to the left, the relative power transmission of steel ball is enclosed within guide groove and moves right, therefore steel ball skids off outside guide groove, and slip in annular dead slot, make radial transmission failure, occur skidding, under the axial action of the screw tap work in-process heart in addition, continuous compression Compress Spring, now, the effect that Compress Spring plays is buffer protection function, screw tap is avoided directly to bear the additional axial force of machining center and fracture, achieve axial direction overload protection, 2, the radial load that screw tap bears first reaches the maximum radial force that arc contact surface that steel ball and power transmission overlap guide groove can bear, steel ball progressively slips in annular dead slot along arc structure, make radial transmission failure, occur skidding, achieve radial overload protection, simultaneously, after screw tap skids, if machining center continues to drive screw tap axial feed, now Compress Spring is progressively compressed, play buffer protection function, prevent screw tap to bear axial force excessive and fracture, by Compress Spring elasticity overcurrent protection structure is combined with the rigidity overcurrent protection structure of steel ball, achieve the axis to screw tap and radial overload protection simultaneously, achieve the protection to screw tap to greatest extent, in addition, no matter these two kinds of overcurrent protection structure roles successively, the design of being overlapped by a power transmission dexterously in conjunction with infiltration together, reciprocal causation, therefore the situation making the utility model can be useful in radial bearing capacity to be greater than axial bearing capacity, as tapping, also the situation that axial bearing capacity is greater than radial bearing capacity can be useful in, as boring, substantially increase the industrial applicability of device, can be used as industry universal standard and apply.
Accompanying drawing explanation
Fig. 1 is the sectional view of the utility model pedestal.
Fig. 2 is the sectional view of the utility model chuck.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1 to Figure 2, the technical scheme that the utility model is taked is as follows: a kind of compressive overload protective device, comprise fixture cover 1, adjusting nut 2, steel ball 3, power transmission cover 4, drill holder 5, Compress Spring 9 and centering assembly, wherein, above-mentioned fixture cover 1 is tubular structure, the left end inwall of fixture cover 1 offers internal thread, and the inner thread that adjusting nut 2 overlaps 1 with fixture is connected; The right side of adjusting nut 2 is provided with power transmission cover 4, and Compress Spring 9 is arranged between adjusting nut 2 and power transmission cover 4, and the end face of adjusting nut 2 and power transmission cover 4 is withstood at the two ends of adjusting nut 2 respectively; Above-mentioned steel ball 3 embeds in the guide groove 43 of power transmission cover 4, so that radial spacing power transmission cover 4, the top of steel ball 3 snaps in and is opened in through hole that fixture overlaps on 1 wall body, so that spacing stationary balls 3; Above-mentioned drill holder 5 is adjacent to the right side that power transmission cover 4 is arranged on power transmission cover 4, is provided with centering assembly in drill holder 5, and screw tap inwardly inserts in power transmission cover 4 through centering assembly.
Plug in the left end of fixture cover 1 and be fixed with main body power transmission pin 8, main body power transmission pin 8 external connection power device, rotate and axially-movable to drive fixture to overlap 1 by main body power transmission pin 8.
Power transmission cover 4 is tubular structure, left side fluting in the cylinder of power transmission cover 4, and right side has square hole, and square hole is communicated with groove, and the width of square hole is less than the diameter of groove, forms the step surface of annular between groove and square hole; The right-hand member of above-mentioned Compress Spring 9 withstands the step anchor ring of this annular, and left end withstands the right side of adjusting nut 2; Screw tap plugs and is fixed in square hole.
The left end of power transmission cover 4 is provided with the first bulge loop 42, and right-hand member is provided with between the second bulge loop 41, first bulge loop 42 and the first bulge loop 41 and forms annular dead slot 44; Above-mentioned guide groove 43 comprises at least two, and guide groove 43 is opened on the first bulge loop 42, and arranges along the circumferencial direction interval of the first bulge loop 42.
Guide groove 43 runs through the left and right end face of the first bulge loop 42, and right-hand member two trough rim of guide groove 43 is respectively arc structure; Above-mentioned steel ball 3 comprises at least two, and each steel ball 3 is embedded respectively in guide groove 43, and corresponding above-mentioned arc structure is arranged, and fixture cover 1 drives power transmission to overlap 4 rotations by steel ball 3, and drives screw tap to rotate by square hole.
Drill holder 5 is tubular structure, and the left end of drill holder 5 is adjacent to the end face of power transmission cover 4, and the inwall of drill holder 5 is intilted cone structure, and the diameter of this cone structure progressively increases from right to left.
Centering assembly comprises centering ball 6, centring sleeve 7 and spring 11, and wherein above-mentioned spring 11 is arranged in drill holder 5, and the left end of spring 11 withstands the interior step anchor ring of drill holder 5; Above-mentioned centring sleeve 7 is plugged in drill holder 5, and centring sleeve 7 withstands spring 11, and extends to outside drill holder 5.
The sidewall of centring sleeve 7 offers draw-in groove, and the cone structure of the corresponding above-mentioned drill holder 5 of this draw-in groove is arranged; Above-mentioned centering ball 6 is fastened in this draw-in groove, inside pressing centring sleeve 7 centering ball 6 moves along cone structure, progressively to slip in cone structure and spring 11 is compressed, to install screw tap, installing screw tap rear spring 11 rebounds extrapolated for centring sleeve 7, centering ball 6 skids off cone structure, and is stuck in the right-hand member of cone structure, so that by centring sleeve 7 and screw tap clamping.
Drill holder 5 is fixed by screws on above-mentioned fixture cover 1, and rotates with fixture cover 1.
The outer end of steel ball 3 is fastened in main body endoporus 10.
Further, the utility model devises a kind of employing binodal structure, and elasticity overcurrent protection structure and rigidity overload protection is combined, to realize radial overload protection and the axial direction overload protection of screw tap or drill bit simultaneously.First, the utility model by fixture cover in arrange mutually be adjacent to setting power transmission cover and drill holder to replace the structure of tap chuck of the prior art and Compress Spring, with axial protective effect subsidiary on the basis realizing quick assembling screw tap, drill holder inside is arranged interior annular step surface structure by the utility model, drill holder inwall is intilted cone structure, and spring is set on this interior step anchor ring, the outer end of spring is connected on centring sleeve, centring sleeve outer wall is embedded with centering ball, during assembling, centring sleeve is pressed to the inside, centering ball progressively slips in the groove of the cone structure of drill holder, screw tap is inwardly inserted in the square opening of power transmission cover, to be fixed, after screw tap has assembled, unclamp centring sleeve, recoil of spring promotion steel ball slides laterally along the groove of cone structure, to clamp screw tap, Compress Spring is provided with in power transmission cover, Compress Spring Inner end withstands the step anchor ring of annular in power transmission cover, adjusting nut is withstood in outer end, adjusting nut and fixture overlap between inwall and are threaded, adjusting nut compresses Compress Spring to the right, and power transmission cover is adjacent to drill holder, and the right-hand member of drill holder and fixture overlap to clamp and arrange, therefore Compress Spring is pre-compressed, and produces an axial direction overload protection power, secondly, the utility model creates a kind of brand-new power transmission cover, the two ends of this power transmission cover are respectively equipped with the first bulge loop and the second bulge loop, annular dead slot is formed between first bulge loop and the second bulge loop, first bulge loop has three guide grooves axially arranged, three guide grooves are arranged along the periphery uniform intervals of the first bulge loop, and by through for the first bulge loop, two trough rims of guide groove right-hand member are set to arc structure respectively, steel ball is provided with in guide groove, steel ball correspondence is arranged on arc structure place, steel ball embeds in the through hole of fixture cover sidewall, and overlap outside main body endoporus with fixture and clamp and arrange, steel ball is radial force transmission element, the main body power transmission pin that fixture puts drives fixture cover to rotate, fixture cover drives power transmission cover to rotate by steel ball, power transmission cover is turned by the square hole resulting belt movable wire coning that it is arranged, particularly, the radial mode of transfer force of steel ball adopts two cambered surface contact structures, namely the sphere of steel ball is adjacent to the arc structure on guide groove sidewall, radial load to be passed to power transmission cover, during actual use, if when the arc structure that the radial load that screw tap bears is greater than guide groove can be supplied to the maximum support power of steel ball, steel ball slips in annular dead slot along arc structure, make radial transmission failure, power transmission cover skids, achieve radial overload protective function, this steel ball and arc structure be combined into rigidity overcurrent protection structure, relative to elasticity overcurrent protection structures such as employing springs, its connection is more stable, long service life, and, larger compared to the overload protection power of the overcurrent protection structures such as the irregular broached-tooth design that market occurs, screw tap intensity is difficult to the defect reaching the requirement of overload protection power, the type of attachment that this kind of sphere contacts with globoidal structure, greatly decrease overload protection power, adapt to actual user demand.Power transmission cover of the present utility model axially can be free to slide in fixture cover, during assembling, pass through rotating adjusting nut, Compress Spring is made to press to power transmission cover to the right, power transmission cover is made to be adjacent to drill holder, and drill holder is axially fixed in fixture cover, therefore constantly rotating adjusting nut makes Compress Spring progressively compress power transmission cover, and produces an axial pre-pressing force, steel ball of the present utility model is fixedly installed in fixture cover and main body endoporus, steel ball is axially inoperative, during actual use, comprise following two kinds of situations: 1, the axial force of screw tap first reaches the loading force that Compress Spring provides in advance, then power transmission cover extrudes to the left by screw tap under responsive to axial force, power transmission cover moves to the left, the relative power transmission of steel ball is enclosed within guide groove and moves right, therefore steel ball skids off outside guide groove, and slip in annular dead slot, make radial transmission failure, occur skidding, under the axial action of the screw tap work in-process heart in addition, continuous compression Compress Spring, now, the effect that Compress Spring plays is buffer protection function, screw tap is avoided directly to bear the additional axial force of machining center and fracture, achieve axial direction overload protection, 2, the radial load that screw tap bears first reaches the maximum radial force that arc contact surface that steel ball and power transmission overlap guide groove can bear, steel ball progressively slips in annular dead slot along arc structure, make radial transmission failure, occur skidding, achieve radial overload protection, simultaneously, after screw tap skids, if machining center continues to drive screw tap axial feed, now Compress Spring is progressively compressed, play buffer protection function, prevent screw tap to bear axial force excessive and fracture, by Compress Spring elasticity overcurrent protection structure is combined with the rigidity overcurrent protection structure of steel ball, achieve the axis to screw tap and radial overload protection simultaneously, achieve the protection to screw tap to greatest extent, in addition, no matter these two kinds of overcurrent protection structure roles successively, the design of being overlapped by a power transmission dexterously in conjunction with infiltration together, reciprocal causation, therefore the situation making the utility model can be useful in radial bearing capacity to be greater than axial bearing capacity, as tapping, also the situation that axial bearing capacity is greater than radial bearing capacity can be useful in, as boring, substantially increase the industrial applicability of device, can be used as industry universal standard and promote.
Embodiment of the present utility model just introduces its detailed description of the invention, does not lie in and limits its protection domain.The technical staff of the industry can make some amendment under the inspiration of the present embodiment, therefore all equivalences done according to the utility model the scope of the claims change or modify, and all belong within the scope of the utility model Patent right requirement.
Claims (10)
1. a compressive overload protective device, it is characterized in that: comprise fixture cover (1), adjusting nut (2), steel ball (3), power transmission cover (4), drill holder (5), Compress Spring (9) and centering assembly, wherein, above-mentioned fixture cover (1) is tubular structure, the left end inwall of fixture cover (1) offers internal thread, and adjusting nut (2) is connected with the inner thread of fixture cover (1); The right side of adjusting nut (2) is provided with power transmission cover (4), and Compress Spring (9) is arranged between adjusting nut (2) and power transmission cover (4), and the end face of adjusting nut (2) and power transmission cover (4) is withstood at the two ends of adjusting nut (2) respectively; Above-mentioned steel ball (3) embeds in the guide groove (43) of power transmission cover (4), so that radial spacing power transmission cover (4), the top of steel ball (3) snaps in the through hole that is opened on fixture cover (1) wall body, so that spacing stationary balls (3); Above-mentioned drill holder (5) is adjacent to the right side that power transmission cover (4) is arranged on power transmission cover (4), and drill holder is provided with centering assembly in (5), and screw tap inwardly inserts in power transmission cover (4) through centering assembly.
2. a kind of compressive overload protective device according to claim 1; it is characterized in that: plug in the left end of described fixture cover (1) and be fixed with main body power transmission pin (8); main body power transmission pin (8) external connection power device, to drive fixture cover (1) to rotate and axially-movable by main body power transmission pin (8).
3. a kind of compressive overload protective device according to claim 2, it is characterized in that: described power transmission cover (4) is tubular structure, left side fluting in the cylinder of power transmission cover (4), right side has square hole, square hole is communicated with groove, and the width of square hole is less than the diameter of groove, between groove and square hole, form the step surface of annular; The right-hand member of above-mentioned Compress Spring (9) withstands the step anchor ring of this annular, and left end withstands the right side of adjusting nut (2); Screw tap plugs and is fixed in square hole.
4. a kind of compressive overload protective device according to claim 3, it is characterized in that: the left end of described power transmission cover (4) is provided with the first bulge loop (42), right-hand member is provided with the second bulge loop (41), forms annular dead slot (44) between the first bulge loop (42) and the first bulge loop (41); Above-mentioned guide groove (43) comprises at least two, and guide groove (43) is opened on the first bulge loop (42), and arranges along the circumferencial direction interval of the first bulge loop (42).
5. a kind of compressive overload protective device according to claim 4, is characterized in that: described guide groove (43) runs through the left and right end face of the first bulge loop (42), and right-hand member two trough rim of guide groove (43) is respectively arc structure; Above-mentioned steel ball (3) comprises at least two, and each steel ball (3) is embedded respectively in guide groove (43), and corresponding above-mentioned arc structure is arranged, and fixture cover (1) drives power transmission cover (4) to rotate by steel ball (3), and drives screw tap to rotate by square hole.
6. a kind of compressive overload protective device according to claim 5; it is characterized in that: described drill holder (5) is tubular structure; the left end of drill holder (5) is adjacent to the end face of power transmission cover (4); the inwall of drill holder (5) is intilted cone structure, and the diameter of this cone structure progressively increases from right to left.
7. a kind of compressive overload protective device according to claim 6, it is characterized in that: described centering assembly comprises centering ball (6), centring sleeve (7) and spring (11), wherein above-mentioned spring (11) is arranged in drill holder (5), and the left end of spring (11) withstands the interior step anchor ring of drill holder (5); Above-mentioned centring sleeve (7) is plugged in drill holder (5), and centring sleeve (7) withstands spring (11), and extends to drill holder (5) outward.
8. a kind of compressive overload protective device according to claim 7, is characterized in that: the sidewall of described centring sleeve (7) offers draw-in groove, and the cone structure of the corresponding above-mentioned drill holder (5) of this draw-in groove is arranged; Above-mentioned centering ball (6) is fastened in this draw-in groove, inside pressing centring sleeve (7) centering ball (6) is moved along cone structure, progressively to slip in cone structure and spring (11) is compressed, to install screw tap, install screw tap rear spring (11) bounce-back by extrapolated for centring sleeve (7), centering ball (6) skids off cone structure, and is stuck in the right-hand member of cone structure, so that by centring sleeve (7) and screw tap clamping.
9. a kind of compressive overload protective device according to claim 8, is characterized in that: described drill holder (5) is fixed by screws on above-mentioned fixture cover (1), and rotates with fixture cover (1).
10. a kind of compressive overload protective device according to claim 9, is characterized in that: the outer end of described steel ball (3) is fastened in main body endoporus (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520322721.4U CN204686550U (en) | 2015-05-19 | 2015-05-19 | A kind of compressive overload protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520322721.4U CN204686550U (en) | 2015-05-19 | 2015-05-19 | A kind of compressive overload protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204686550U true CN204686550U (en) | 2015-10-07 |
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ID=54226889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520322721.4U Expired - Fee Related CN204686550U (en) | 2015-05-19 | 2015-05-19 | A kind of compressive overload protective device |
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| Country | Link |
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| CN (1) | CN204686550U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104827341A (en) * | 2015-05-19 | 2015-08-12 | 深圳比特力机械有限公司 | Compressive overload protection device |
| CN107716126A (en) * | 2017-11-17 | 2018-02-23 | 成都西部石油装备股份有限公司 | A kind of Novel horizontal decanter centrifuge safety guard |
-
2015
- 2015-05-19 CN CN201520322721.4U patent/CN204686550U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104827341A (en) * | 2015-05-19 | 2015-08-12 | 深圳比特力机械有限公司 | Compressive overload protection device |
| CN107716126A (en) * | 2017-11-17 | 2018-02-23 | 成都西部石油装备股份有限公司 | A kind of Novel horizontal decanter centrifuge safety guard |
| CN107716126B (en) * | 2017-11-17 | 2023-08-29 | 成都西部石油装备股份有限公司 | Novel safety protection device for horizontal decanter centrifuge |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20180519 |