CN106532561A - Centrifuging clamping apparatus with backup protection - Google Patents

Centrifuging clamping apparatus with backup protection Download PDF

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Publication number
CN106532561A
CN106532561A CN201611107150.8A CN201611107150A CN106532561A CN 106532561 A CN106532561 A CN 106532561A CN 201611107150 A CN201611107150 A CN 201611107150A CN 106532561 A CN106532561 A CN 106532561A
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CN
China
Prior art keywords
leading screw
litter
trocar sheath
interior
protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201611107150.8A
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Chinese (zh)
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CN106532561B (en
Inventor
郑和平
汤晓青
范宇
廖家俊
王星
覃浩
孟旭跃
杨力
陈立
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SICHUAN ELECTRIC VOCATIONAL AND TECHNICAL COLLEGE
State Grid Corp of China SGCC
State Grid Sichuan Electric Power Co Ltd
Original Assignee
SICHUAN ELECTRIC VOCATIONAL AND TECHNICAL COLLEGE
State Grid Corp of China SGCC
State Grid Sichuan Electric Power Co Ltd
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Application filed by SICHUAN ELECTRIC VOCATIONAL AND TECHNICAL COLLEGE, State Grid Corp of China SGCC, State Grid Sichuan Electric Power Co Ltd filed Critical SICHUAN ELECTRIC VOCATIONAL AND TECHNICAL COLLEGE
Priority to CN201611107150.8A priority Critical patent/CN106532561B/en
Publication of CN106532561A publication Critical patent/CN106532561A/en
Application granted granted Critical
Publication of CN106532561B publication Critical patent/CN106532561B/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

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  • Surgical Instruments (AREA)
  • Clamps And Clips (AREA)

Abstract

The invention discloses a centrifuging clamping apparatus with a backup protection. The centrifuging clamping apparatus comprises a front clamp, a back clamp and lead screws, wherein protective sliding rod assemblies are arranged between the front clamp and the back clamp; each protective sliding rod assembly and outer sleeve and an inner sliding rod which can slide relatively; and the inner sliding rod is limited in the outer sleeve through a limiting apparatus. The centrifuging clamping apparatus has the backup protection function, which can prevent an insulator string from being fractured when the lead screws are cracked or fallen off accidentally, so that high security coefficient is achieved; and therefore, severe personal safety accidents or power grid equipment accidents can be avoided.

Description

A kind of centrifugal fixture with back-up protection
Technical field
The present invention relates to a kind of insulator replacement tool, and in particular to a kind of centrifugal fixture with back-up protection.
Background technology
Centrifugal fixture is a kind of metal fixture for changing monolithic glass or porcelain insulator in power transmission lines overhauling, is wrapped The front card and rear card for installing insulator is included, two leading screws are set between front card and rear card, during use, only need to be by front card and rear card It is stuck in before and after insulator to be replaced on two panels insulator steel cap, leading screw is by the load transfer on insulator to be replaced to card is centrifuged On, so as to carry out the replacing of insulator.
At present, during existing centrifugation is stuck in for changing insulator, as the load that insulator chain bears is big, it is centrifuged Card will also carry larger load, and operator changes more laborious during insulator, and operation tool acquires a certain degree of difficulty.When leading screw accident Rupture or because misoperation makes leading screw come off, cause insulator chain fracture, wire dropping, it will cause serious personal safety thing Therefore with grid equipment accident.
The content of the invention
In order to solve above-mentioned technical problem, the present invention discloses a kind of centrifugal fixture with back-up protection, the centrifugal fixture Possess back-up protection function, Insulator detection can be prevented after leading screw surprisingly ruptures or comes off, safety coefficient is high, it is to avoid cause Serious personal safety accident or grid equipment accident.
The present invention is achieved through the following technical solutions:
A kind of centrifugal fixture with back-up protection, including front card, rear card and leading screw, is provided with guarantor between the front card and rear card Shield litter component, the protection litter component include trocar sheath and interior litter, and trocar sheath relative can be slided with interior litter, and interior Litter is limited to itself in trocar sheath by stopping means.
During replacing insulator is stuck in due to existing centrifugation, the load that insulator chain bears is big, and centrifugation card will also hold Larger load is carried, when leading screw surprisingly ruptures or because misoperation makes leading screw come off, insulator chain fracture, wire dropping is caused, Serious personal safety accident and grid equipment accident will be caused.
The present invention protects the trocar sheath in litter component and interior cunning by arranging protection litter component between front card and rear card Relative can slide between pole and each other without departing from generating the effect of a back-up protection to centrifugal fixture.When leading screw rotates, Front card and it is rear block between distance increase or during reducing, trocar sheath and interior litter is relative therewith slides, with adapt to front card and after The change of card distance, when the leading screw in centrifugal fixture cannot bear the load of insulator weight and rupture or come off, protection is slided Interior litter in pole component then slides into the limit with trocar sheath, and fixes restriction relative position by stopping means, even if leading screw Fracture comes off, and front card and rear card can still rely on protection litter component connection, it is to avoid insulator chain ruptures, greatly improve from Heart card replacement is insulated the safety of child-operation, it is to avoid unnecessary personal safety accident and power equipment accident.
The trocar sheath is blocked before being fixed on by a front clamping joint away from interior litter one end, and the interior litter is away from outer One end of sleeve pipe is provided with bar shaped chute by clamping joint after on rear card on trocar sheath, and the stopping means are arranged on On interior litter.
The stopping means be adjusting knob, adjusting knob for annular and be sheathed on interior litter, the adjusting knob with Interior litter is connected by coarse-pitch thread.
The adjusting knob external diameter has with trocar sheath that the internal diameter of bar shaped chute section is identical, and the trocar sheath is connected with interior litter Connect the internal diameter that one end to the internal diameter at bar shaped chute has bar shaped chute section less than trocar sheath.
In the present invention, position-adjustable of the adjusting knob on interior litter can increase the efficiency of its regulation using coarse-pitch thread, The adjusting knob and interior litter for adjusting good position can be in the trocar sheath of bar shaped chute section slidably, beneficial to protection litter group Part makes corresponding change with tightening up or loosening for leading screw.When the interior litter with adjusting knob slides into bar shaped chute least significant end When, the internal diameter at one end to bar shaped chute being connected with interior litter due to trocar sheath is had in bar shaped chute section less than trocar sheath Footpath, therefore adjusting knob will be limited in the trocar sheath of bar shaped chute bottom, prevent interior litter from skidding off from trocar sheath, it is ensured that The reliability of protection litter component, realizes its standby defencive function.
Further, the interior litter end is provided with a limited block, and the limited block is partially disposed in bar shaped chute.Limit Position block is arranged at interior litter end, when adjusting knob is difficult to bearing stress and damages, can also limit interior litter by limited block It is scheduled in trocar sheath, makes both be unlikely to separate, further increase the safety and reliability of protection litter component.
Bar shaped chute can not only coordinate the effect for producing further raising protection litter assembly reliability with limited block, also Adjusting knob of the partial denudation at bar shaped chute can be adjusted using finger rotation.
In the present invention, adjusting knob is used not only for interior litter is limited in trocar sheath, additionally it is possible to adjust from Relative position on interior litter, after position adjustments of the adjusting knob on interior litter are good, if leading screw ruptures or comes off, interior litter Bar shaped chute bottom will be rapidly slid into outward along the direction for departing from trocar sheath, the distance which slides is that adjusting knob is slided to bar shaped The distance of trench bottom, this distance are bigger, and interior litter accelerator is longer, and the speed for sliding into bar shaped chute bottom is bigger, because And impulsive force that adjusting knob is subject to is bigger.If impulsive force is excessive, adjusting knob may be damaged, reduce protection litter component Safety.The adjusting knob of the present invention adjusts its own position on interior litter using coarse-pitch thread, when leading screw surprisingly ruptures Or after coming off, due to protecting the distance that litter slides in litter component adjustable, ensureing protection litter component with leading screw Folding and unfolding and while make corresponding slip, effectively reduce that the adjusting knob when leading screw ruptures or comes off is subject to impacts, and improves and protects The reliability of shield litter component, extends its service life.
The protection litter component is two, the left and right sides of card and parallel with leading screw before being respectively arranged at.
It is connected by leading screw joint between the leading screw and front card and rear card, the leading screw joint is at the end with leading screw connecting place End is provided with self-locking device, and leading screw is provided with the positioner matched with self-locking device, is passed through in the end with leading screw joint Self-locking device and positioner are automatically by leading screw connector locking in leading screw.
It is existing centrifugation card safety coefficient it is not high the reason for essentially consist in replacing insulator during leading screw be easily broken off and take off Fall, as the load that insulator chain bears is big, after insulator is lax, centrifugation card also needs to bear the whole before insulator relaxes Load, when rotational lead screw crank makes leading screw progressively separate with leading screw joint, easily comes off between leading screw and leading screw joint, causes absolutely Edge fracture, wire dropping.
As the front card and rear card of centrifugation card are produced in batches previously according to the specification of insulator, its structure, intensity With stability preferably, deformation or situation about rupturing is less prone in replacing insulator, and leading screw and leading screw joint have itself Some strength, is not easy to the situation for fracture occur.But during insulator is changed, rotational lead screw crank is needed, leading screw is made Rotate to adjust the distance between front card and rear card relative to leading screw joint, be easy to replacing insulator, and lead between leading screw and leading screw joint Threaded connection is crossed, screw thread needs to bear a constant load, when leading screw will be separated with leading screw joint, easily occurred because screw thread cannot Meet with stresses and cause leading screw to depart from from leading screw joint.
Present inventor leading screw and leading screw joint connecting place be provided be placed in leading screw connector end self-locking device and Located at the positioner of leading screw end, in leading screw rotary course, when which is rotated when will being separated with leading screw joint, leading screw connects Self-locking device on head is automatically locked in the positioner of leading screw, therefore in the connection of leading screw and leading screw joint, not only screw thread The stress produced due to insulator weight is born, and stress is assume responsibility for also by self-locking device and positioner, is substantially increased silk Thick stick and leading screw joint connection reliability, shield to the connection between leading screw and leading screw joint, it is to avoid changing insulator mistake In journey, leading screw comes off, and causes insulator chain fracture, wire dropping.The potential safety hazard of centrifugal fixture can be substantially reduced, improves exhausted The safety that edge is changed, is suitably widely popularized.
The self-locking device includes elastic device and ball, and ball is two and is fixed on the two ends of elastic device, described Leading screw joint is provided with a radial direction through hole, is transversely provided with sleeve pipe in through hole, and the elastic device and ball are located in sleeve pipe, institute State elastic device both sides and be respectively connected with a spacing collar, spacing collar is sheathed on elastic device periphery, and spacing collar inwall Elastic device two ends are fixed at middle part.
The positioner is two detents, and detent is arranged at leading screw inwall, and the detent includes using In positioning groove ends and be easy to ball to slide in or out the fluted tail of groove ends.
Self-locking device in the present invention is mainly elastic device and ball, and when leading screw is tightened up, leading screw connector end is placed in silk Thick stick slotted eye bottom, now elastic device be in compressive state, elastic device and ball are in sleeve pipe, when leading screw rotates, silk Level joint is outwards rotated relative to leading screw slotted eye, is rotated against when the self-locking device on leading screw joint to the fluted tail of detent When, elastic device starts to both sides to stretch, and ball starts to stretch out outside sleeve pipe, reverses leading screw, and leading screw joint continues relative to leading screw Outwards rotate, elastic device continues both sides and stretches, and most the ball at its two ends is pressed into the groove ends of detent at last, now Spacing collar is stretched with elastic device, and one end of spacing collar is placed in sleeve pipe, and the other end is placed in detent, and leading screw is connect Head is locked in leading screw, cannot now be further continued for reversing leading screw, it is to avoid leading screw departs from from leading screw joint.
Meanwhile, the spacing collar of the present invention ensure that, when ball is fully sunk in groove ends, spacing collar one end is placed in In sleeve pipe, the other end is placed in groove ends, it is ensured that the effectively connection between self-locking device and positioner, realizes auto-lock function.
When needing to tighten up the distance between the front card of centrifugation card and rear card, leading screw is reversely rotated, leading screw joint is with respect to silk Thick stick slotted eye inwardly rotates, and now ball is gradually skidded off along the path of groove ends to fluted tail, and elastic device progressively compresses, Final self-locking device fully slides out positioner, and elastic device and ball are compressed in sleeve pipe again.Ensure that leading screw energy Enough bidirectional rotations ensure that leading screw does not come off from leading screw joint on the basis of adjusting, and improve the safety of replacing insulator.
Side wall of the groove ends on the outside of leading screw is vertical with leading screw inwall, and groove ends are away from the side on the outside of leading screw Wall is smooth cambered surface, and the fluted tail inwall is cambered surface, and fluted tail trend is consistent with screw thread trend, and detent depth Degree is progressively reduced to fluted tail end by groove ends.
Side wall of the groove ends on the outside of leading screw is vertical with leading screw inwall, compared to by groove ends on the outside of leading screw Side wall be manufactured into cambered surface for, can both prevent ball from continuing the Slideslip to outside leading screw along which, can also with increase spacing collar With the contact surface of groove ends, spacing collar can be avoided from being worn with groove ends contact portion or should because being difficult to bear Power and deform, effectively increase reliability and the ruggedness of self-locking device and positioner this system.
Meanwhile, in the present invention, self-locking device and positioning means contacts part are ball, the groove ends of detent away from Side wall on the outside of leading screw is smooth cambered surface, and fluted tail inwall is cambered surface, and the contact surface coefficient of friction of arc is little, be conducive to from Locking device relative positioning devices slide.Fluted tail trend it is consistent with screw thread trend, and detent depth by groove ends extremely Fluted tail end progressively reduces, and is easy to the self-locking device in leading screw rotary course progressively to slip into positioner simultaneously along direction of rotation Locking, also allows for self-locking device and skids off positioner along identical path.Reach light self-locking and release the function of self-locking, operate Get up time saving and energy saving, it is safe and reliable.
Preferably, the elastic device is spring.The preferable elastic construction of other elastic performances or part can also be adopted. Its auto-lock function can effectively be performed to meet self-locking device.
The present invention compared with prior art, has the following advantages and advantages:
1st, a kind of centrifugal fixture with back-up protection of the present invention, by arranging protection litter group between front card and rear card Part, protects Or come off, front card and rear card can still rely on the component connection of protection litter, it is to avoid insulator chain ruptures, and greatly improves centrifugation card Change the safety of insulation child-operation, it is to avoid unnecessary personal safety accident and power equipment accident;
2nd, a kind of centrifugal fixture with back-up protection of the present invention, is put by being provided with leading screw joint connecting place in leading screw In the self-locking device and the positioner located at leading screw end of leading screw connector end, in leading screw rotary course, when its rotate to When will separate with leading screw joint, the self-locking device on leading screw joint is automatically locked in the positioner of leading screw, is greatly improved Leading screw and leading screw joint connection reliability, directly effectively prevent the leading screw during insulator is changed and come off, can be notable Reduce the potential safety hazard of centrifugal fixture, be suitably widely popularized;
3rd, a kind of centrifugal fixture with back-up protection of the present invention, by arranging protection litter component and self-locking device and determining Position device system, in root, leading screw can not only be avoided from coming off, at the same can also block before preventing after leading screw comes off or rupture with Card departs from afterwards, it is to avoid cause insulator chain to rupture, and causes electric power safety accident, the potential safety hazard of replacing insulator and may will make Into loss be reduced to minimum.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention;
Fig. 2 is present invention protection litter modular construction schematic diagram;
Fig. 3 is trocar sheath sectional side elevation of the present invention;
Fig. 4 is trocar sheath radial cross-section of the present invention;
Fig. 5 is partial sectional view at A in Fig. 1 of the present invention;
Fig. 6 is self-locking device of the present invention and positioning device structure schematic diagram;
Fig. 7 is locked in schematic diagram in positioner for self-locking device of the present invention;
Fig. 8 is leading screw inwall local expansion figure of the present invention.
Labelling and corresponding parts title in accompanying drawing:
Block before 1-, block after 2-, 3- leading screws, 31- screw threads, 4- protection litter components, 5- trocar sheaths, clamping joint before 51-, 52- Bar shaped chute, litter in 6-, clamping joint after 61-, 62- adjusting knobs, 63- limited blocks, 7- leading screw joints, 8- self-locking devices, 81- Elastic device, 82- balls, 83- sleeve pipes, 84- spacing collars, 9- positioners, 91- groove ends, 92- fluted tails.
Specific embodiment
For making the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this Invention is described in further detail, and the exemplary embodiment of the present invention and its explanation are only used for explaining the present invention, do not make For limitation of the invention.
Embodiment
As shown in Fig. 1~8, a kind of centrifugal fixture with back-up protection of the present invention, including front card 1, rear card 2 and leading screw 3, Protection litter component 4 is provided with before described between card 1 and rear card 2, the protection litter component 4 includes trocar sheath 5 and interior litter 6, outward Sleeve pipe 5 relative can be slided with interior litter 6, and interior litter 6 itself will be limited in trocar sheath 5 by stopping means.
The trocar sheath 5 is blocked before being fixed on by a front clamping joint 51 away from 6 one end of interior litter on 1, the interior litter 6 Away from trocar sheath 5 one end by clamping joint 61 after on rear card, be provided with bar shaped chute 52, the limit on trocar sheath 5 Position device is arranged on interior litter 6.
The stopping means are adjusting knob 62, and adjusting knob 62 is for annular and is sheathed on interior litter 6, described to adjust rotation Button 62 is connected by coarse-pitch thread with interior litter 6.
62 external diameter of the adjusting knob and trocar sheath 5 have the internal diameter of 52 sections of bar shaped chute identical, the trocar sheath 5 with it is interior Internal diameter at the connection of litter 6 one end to bar shaped chute 52 has the internal diameter of 52 sections of bar shaped chute less than trocar sheath 5.
6 end of interior litter is provided with a limited block 63, and the limited block 63 is partially disposed in bar shaped chute 52.
The protection litter component 4 is two, the left and right sides of card 1 and parallel with leading screw 3 before being respectively arranged at.
It is connected by leading screw joint 7 between the leading screw 3 and front card 1 and rear card 2, the leading screw joint 7 is being connected with leading screw 3 The end at place is provided with self-locking device 8, and leading screw 3 is provided with the positioning matched with self-locking device 8 in the end with 7 junction of leading screw joint Device 9, is locked in leading screw joint 7 in leading screw 3 automatically by self-locking device 8 and positioner 9.
The self-locking device 8 includes elastic device 81 and ball 82, and ball 82 is two and is fixed on elastic device 81 Two ends, the leading screw joint 7 are provided with a radial direction through hole, are transversely provided with sleeve pipe 83, the elastic device 81 and circle in through hole In sleeve pipe 83,81 both sides of the elastic device are respectively connected with a spacing collar 84 to ball 82, and spacing collar 84 is sheathed on bullet Property is fixed on 81 two ends of elastic device in the middle part of 81 periphery of device, and 84 inwall of spacing collar.
The positioner 9 is two detents, and detent is arranged at 3 inwall of leading screw, and the detent includes Groove ends 91 for positioning and it is easy to ball 82 to slide in or out the fluted tail 92 of groove ends 91.
Side wall of the groove ends 91 on the outside of leading screw 3 is vertical with 3 inwall of leading screw, and groove ends 91 are away from leading screw 3 The side wall in outside is smooth cambered surface, and 92 inwall of the fluted tail is cambered surface, the trend of fluted tail 92 and 3 inner thread of leading screw 31 trends are consistent, and detent depth is progressively reduced to 92 end of fluted tail by groove ends 91.
Preferably, the elastic device 81 is spring.
When insulator is changed using centrifugal fixture of the present invention, as leading screw 3 and 7 coupling part of leading screw joint are provided with self-locking Device 8 and positioner 9, therefore the steadiness that leading screw 3 is connected with leading screw joint 7 is high, leading screw is difficult for drop-off.In rotating threaded shaft 3 Adjust the distance of front card and rear card to change during insulator, protect the interior litter 6 of litter component 4 phase can be made in trocar sheath 5 That what is answered slides up and down, and to adapt to the change of 2 distances of front card 1 and rear card, when leading screw surprisingly ruptures, interior litter 6 is quick outer along skidding off The direction of sleeve pipe 5 is slided, and interior litter 6 is limited in trocar sheath 5 eventually through adjusting knob 62, it is to avoid insulator chain ruptures And cause security incident.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect Describe in detail, the be should be understood that specific embodiment that the foregoing is only the present invention is not intended to limit the present invention Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include Within protection scope of the present invention.

Claims (10)

1. a kind of centrifugal fixture with back-up protection, including front card (1), rear card (2) and leading screw (3), it is characterised in that described Protection litter component (4) is provided between front card (1) and rear card (2), and protection litter component (4) includes trocar sheath (5) and interior cunning Pole (6), trocar sheath (5) relative can be slided with interior litter (6), and itself is limited by interior litter (6) by stopping means In trocar sheath (5).
2. a kind of centrifugal fixture with back-up protection according to claim 1, it is characterised in that trocar sheath (5) It is fixed on front card (1) by one front clamping joint (51) away from interior litter (6) one end, interior litter (6) are away from trocar sheath (5) one end is provided with bar shaped chute (52), the limit by clamping joint (61) after on rear card (2) on trocar sheath (5) Position device is arranged on interior litter (6).
3. a kind of centrifugal fixture with back-up protection according to claim 2, it is characterised in that the stopping means are Adjusting knob (62), adjusting knob (62) is for annular and is sheathed on interior litter (6), adjusting knob (62) and interior litter (6) it is connected by coarse-pitch thread.
4. a kind of centrifugal fixture with back-up protection according to claim 3, it is characterised in that the adjusting knob (62) internal diameter of the external diameter with trocar sheath (5) with bar shaped chute (52) section is identical, and trocar sheath (5) are connected with interior litter (6) The internal diameter of one end to bar shaped chute (52) place has the internal diameter of bar shaped chute (52) section less than trocar sheath (5).
5. a kind of centrifugal fixture with back-up protection according to any one of Claims 1 to 4, it is characterised in that institute State interior litter (6) end and be provided with a limited block (63), limited block (63) are partially disposed in bar shaped chute (52).
6. a kind of centrifugal fixture with back-up protection according to claim 5, it is characterised in that the protection litter group Part (4) is two, is respectively arranged at the left and right sides of front card (1) and parallel with leading screw (3).
7. a kind of centrifugal fixture with back-up protection according to any one of Claims 1 to 4, it is characterised in that institute State, leading screw joint (7) with leading screw (3) phase End at even is provided with self-locking device (8), and leading screw (3) is provided with and self-locking device (8) in the end with leading screw joint (7) junction Leading screw joint (7) is locked in leading screw (3) by self-locking device (8) and positioner (9) by the positioner (9) of matching automatically It is interior.
8. a kind of centrifugal fixture with back-up protection according to claim 7, it is characterised in that the self-locking device (8) elastic device (81) and ball (82) are included, ball (82) is for two and is fixed on the two ends of elastic device (81), the silk Level joint (7) is provided with a radial direction through hole, is transversely provided with sleeve pipe (83), elastic device (81) and ball (82) in through hole In sleeve pipe (83), elastic device (81) both sides are respectively connected with a spacing collar (84), and spacing collar (84) is arranged Elastic device (81) two ends are fixed in the middle part of elastic device (81) periphery, and spacing collar (84) inwall.
9. a kind of centrifugal fixture with back-up protection according to claim 8, it is characterised in that the positioner (9) it is two detents, detent is arranged at leading screw (3) inwall, the detent includes the groove ends for positioning Portion (91) and it is easy to ball (82) to slide in or out the fluted tail (92) of groove ends (91).
10. self-locking centrifugal fixture according to claim 9, it is characterised in that groove ends (91) are near leading screw (3) the side wall on the outside of is vertical with leading screw (3) inwall, and groove ends (91) are smooth cambered surface away from the side wall on the outside of leading screw (3), Fluted tail (92) inwall is cambered surface, and fluted tail (92) trend is consistent with screw thread (31) trend, and detent depth Progressively reduced to fluted tail (92) end by groove ends (91).
CN201611107150.8A 2016-12-06 2016-12-06 A kind of centrifugal fixture with back-up protection Active CN106532561B (en)

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Application Number Priority Date Filing Date Title
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CN106532561B CN106532561B (en) 2018-03-20

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CN206302090U (en) * 2016-12-06 2017-07-04 国网四川省电力公司技能培训中心 A kind of safety coefficient centrifugal fixture high

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