CN110608222A - Screw anti-dismounting device, anti-dismounting screw and screwdriver bit - Google Patents

Screw anti-dismounting device, anti-dismounting screw and screwdriver bit Download PDF

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Publication number
CN110608222A
CN110608222A CN201910886994.4A CN201910886994A CN110608222A CN 110608222 A CN110608222 A CN 110608222A CN 201910886994 A CN201910886994 A CN 201910886994A CN 110608222 A CN110608222 A CN 110608222A
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CN
China
Prior art keywords
screw
guide part
nut
boss
grooves
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.)
Pending
Application number
CN201910886994.4A
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Chinese (zh)
Inventor
唐金峰
胡光耀
余超
罗斌彬
鄢诚挚
王平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gongniu Group Co Ltd
Original Assignee
Bull Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bull Group Co Ltd filed Critical Bull Group Co Ltd
Priority to CN201910886994.4A priority Critical patent/CN110608222A/en
Publication of CN110608222A publication Critical patent/CN110608222A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

The invention is suitable for the technical field of anti-dismantling screws and provides a screw anti-dismantling device, an anti-dismantling screw and a screwdriver bit, wherein the screw anti-dismantling device comprises the anti-dismantling screw and the screwdriver bit; the anti-dismantling screw comprises a screw rod and a screw cap connected with one end of the screw rod, the screw cap is provided with at least three grooves distributed around the central axis of the screw cap and isolating parts for isolating the at least three grooves from each other, and the inner wall of each groove is provided with a first guiding part; the batch head comprises a batch head body and a boss which is arranged on the batch head body and matched with the groove, and the boss is provided with a second guide part matched with the first guide part. The anti-dismantling screw of the screw anti-dismantling device provided by the invention can be opened only by the specific screwdriver head matched with the anti-dismantling screw, so that a user can be prevented from adopting a universal screwdriver head to dismantle the anti-dismantling screw by self; and the buckling rate of the screwdriver head and the anti-dismounting screw is greatly improved, the alignment capability of the screwdriver head and the anti-dismounting screw is improved, and the alignment of the screwdriver head and the anti-dismounting screw is facilitated.

Description

Screw anti-dismounting device, anti-dismounting screw and screwdriver bit
Technical Field
The invention relates to the technical field of anti-dismantling screws, in particular to a screw anti-dismantling device, an anti-dismantling screw and a screwdriver bit.
Background
In the electrical equipment of people daily use, in order to guarantee safety, some electrical equipment need use and prevent tearing open the screw, prevent that the user from dismantling by oneself. Such as: the converter shell of the non-disconnectable converter cannot be opened by a common tool, the flexible cable cannot be replaced, and the lead and the wiring terminal are permanently connected together by the anti-dismantling screw, so that a user cannot replace the flexible cable by himself.
In the prior art, the anti-dismantling screws mainly comprise Y-shaped groove screws, quincunx groove screws and square groove screws, and the Y-shaped groove screws, the quincunx groove screws and the square groove screws are all easily dismantled by universal screwdriver heads in a straight shape, a cross shape and the like; moreover, the anti-dismantling screw is not provided with a guide structure matched with the corresponding screwdriver head, so that the anti-dismantling screw is not convenient to align with the corresponding screwdriver head.
Disclosure of Invention
The invention provides a screw anti-dismounting device, and aims to solve the problems that an anti-dismounting screw in the prior art is easily dismounted by a universal screwdriver bit and the anti-dismounting screw and a corresponding screwdriver bit are not convenient to align.
The invention is realized in this way, a screw anti-dismounting device, including anti-dismounting screw and batch head adapted to the anti-dismounting screw;
the anti-dismantling screw comprises a screw rod with threads and a screw cap connected with one end of the screw rod, the screw cap is provided with at least three grooves distributed at intervals around the central axis of the screw cap and isolating parts for isolating the at least three grooves from each other, and the inner wall of each groove is provided with a first guiding part;
criticize the head including criticizing the head body, locate criticize on the head body and with the boss that the recess cooperation set up, be equipped with on the boss with the second guide part that the cooperation of first guide part set up, the boss can be correspondingly put into be used for revolving in the recess and twist prevent tearing open the screw.
Preferably, the number of the grooves is 3-5.
Preferably, the number of the grooves is three, the three grooves are uniformly distributed around the central axis of the screw cap at intervals, and the included angle formed by the central lines of the two adjacent grooves is 120 degrees.
Preferably, the first guide part is a first inclined plane forming a preset included angle with the central axis of the nut, and the second guide part is a second inclined plane matched with the first inclined plane; or the first guide part is a first cambered surface, and the second guide part is a second cambered surface matched with the first cambered surface.
Preferably, the included angle between the first inclined plane and the central axis of the screw cap is 5-10 degrees, and the included angle between the second inclined plane and the central axis of the screwdriver bit body is 20-30 degrees.
Preferably, the recess includes the diapire, locates two first inner walls and the connection of the relative both sides of diapire two the second inner wall of first inner wall, first guide part is located on the second inner wall, first inner wall with the contained angle of diapire is 85 ~ 95.
The invention also provides an anti-dismantling screw which comprises a screw rod with threads and a screw cap connected with one end of the screw rod, wherein the screw cap is provided with at least three grooves distributed around the central axis of the screw cap and isolating parts for isolating the at least three grooves from each other, and the inner wall of each groove is provided with a first guiding part matched with the second guiding part of the screwdriver bit.
Preferably, the first guide part is a first inclined plane forming a preset included angle with the central axis of the nut, and the second guide part is a second inclined plane matched with the first inclined plane; or the first guide part is a first cambered surface, and the second guide part is a second cambered surface matched with the first cambered surface.
The invention also provides a screwdriver bit which comprises a screwdriver bit body and a boss arranged on the screwdriver bit body and matched with the groove of the nut of the anti-dismantling screw, wherein the boss is provided with a second guide part matched with the first guide part of the nut, and the boss can be correspondingly arranged in the groove for screwing the anti-dismantling screw.
Preferably, the first guide part is a first inclined plane forming a preset included angle with the central axis of the nut, and the second guide part is a second inclined plane matched with the first inclined plane; or the first guide part is a first cambered surface, and the second guide part is a second cambered surface matched with the first cambered surface.
The screw anti-dismounting device provided by the invention has the advantages that the at least three grooves distributed at intervals around the central axis of the screw cap are arranged on the screw cap of the anti-dismounting screw, and the isolating parts for isolating the at least three grooves from each other are arranged, so that the universal screwdriver heads in a straight shape or a cross shape and the like cannot be buckled into the grooves of the screw cap due to the existence of the isolating parts, and only the special screwdriver heads matched with the grooves of the anti-dismounting screw can be buckled into the grooves of the anti-dismounting screw, so that a user can be prevented from dismounting the anti-dismounting screw by adopting the universal screwdriver heads; simultaneously, through set up at least three recess on the nut of preventing tearing open the screw, improved the boss of criticizing the head greatly and prevented the lock rate of the recess of tearing open the screw, promoted the counterpoint ability of criticizing the head and preventing tearing open the screw. The inner wall of the groove of the anti-dismantling screw is provided with the first guide part, the boss of the screwdriver head is provided with the second guide part matched with the first guide part, and the boss of the screwdriver head can be smoothly clamped into the groove of the anti-dismantling screw under the guide effect of the mutual matching of the second guide part and the first guide part, so that the alignment of the screwdriver head and the anti-dismantling screw is facilitated.
Drawings
Fig. 1 is a three-dimensional structure diagram of a screw anti-detachment middle bit and an anti-detachment screw which are not matched according to a first embodiment of the present invention;
fig. 2 is a three-dimensional structure diagram of a bit and an anti-disassembly screw in the screw anti-disassembly apparatus according to the first embodiment of the present invention;
fig. 3 is a schematic structural view of a bit and an anti-disassembly screw in the screw anti-disassembly apparatus according to the first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a bit of a screw detachment prevention device according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a tamper screw of the screw tamper apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a tamper screw of the screw tamper apparatus according to another view of the present invention;
FIG. 7 is a schematic cross-sectional view of a tamper screw of the screw tamper apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a tamper screw of the screw tamper apparatus according to the second embodiment of the present invention;
FIG. 9 is a structural diagram of a second view of a tamper screw of the screw tamper apparatus according to the second embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of a tamper screw of the screw tamper apparatus according to the second embodiment of the present invention;
fig. 11 is a schematic structural view of a tamper screw of the screw tamper apparatus according to the third embodiment of the present invention;
fig. 12 is a structural schematic diagram of a disassembly-preventing screw of the screw disassembly-preventing device according to the third embodiment of the present invention from another view angle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
According to the screw anti-dismounting device provided by the embodiment of the invention, the at least three grooves which are distributed at intervals around the central axis of the nut are arranged on the nut of the anti-dismounting screw, and the isolating parts which isolate the at least three grooves from each other are arranged, so that only the specific bits which are matched with the grooves of the anti-dismounting screw can be buckled into the grooves of the anti-dismounting screw, and therefore, a user can be prevented from dismounting the anti-dismounting screw by adopting a universal bit; simultaneously, through set up at least three recess on the nut of preventing tearing open the screw, improved the boss of criticizing the head greatly and prevented the lock rate of the recess of tearing open the screw, promoted the counterpoint ability of criticizing the head and preventing tearing open the screw. The inner wall of the groove of the anti-dismantling screw is provided with the first guide part, the boss of the screwdriver head is provided with the second guide part matched with the first guide part, and the boss of the screwdriver head can be smoothly clamped into the groove of the anti-dismantling screw under the guide effect of the mutual matching of the second guide part and the first guide part, so that the alignment of the screwdriver head and the anti-dismantling screw is facilitated.
Example one
Referring to fig. 1 to 7, an embodiment of the invention provides a screw detachment prevention device, which includes a detachment prevention screw 1 and a bit 2 adapted to the detachment prevention screw 1.
The anti-disassembly screw 1 comprises a screw rod 11 provided with threads 10 and a screw cap 12 connected with one end of the screw rod 11, the screw cap 12 is provided with at least three grooves 121 distributed at intervals around the central axis of the screw cap 12 and isolating parts 122 for isolating the at least three grooves 121 from each other, and the inner wall of each groove 122 is provided with a first guiding part.
Criticize first 2 including criticizing first body 20, locate on criticizing first body 20 and with the boss 21 of recess 121 cooperation setting, boss 21 is equipped with the second guide part that sets up with the cooperation of first guide part, and boss 21 can be correspondingly put into recess 121 and be used for revolving to twist anti-disassembly screw 1.
In the embodiment of the present invention, at least three grooves 121 spaced apart from each other around the central axis of the nut 12 are provided in the nut 12 of the tamper-proof screw 1, and the at least three grooves 121 are isolated from each other by the isolating portions 122, the isolating portions 122 are provided between the grooves 121, and the grooves 121 are isolated from each other by the isolating portions 122. Due to the existence of the isolation part 122, the universal screwdriver bits in a line shape or a cross shape and the like can not be buckled into the groove 121 of the nut 12, so that the anti-dismantling screw 1 can be effectively prevented from being opened by the universal screwdriver bits in a line shape or a cross shape and the like, and the anti-dismantling screw 1 can be opened only by screwing the special screwdriver bits provided with the bosses 21 matched with the grooves 121 of the anti-dismantling screw 1, so that the anti-dismantling effect is achieved, and the user can be prevented from dismantling the anti-dismantling screw 1 by himself.
In the embodiment of the invention, the at least three grooves 121 are formed in the nut 12 of the anti-dismantling screw 1, so that the buckling rate of the boss 21 of the bit 2 and the grooves 121 of the anti-dismantling screw 1 is greatly improved, and the alignment capability of the bit 2 and the anti-dismantling screw 1 is improved.
In the embodiment of the invention, the first guide part is arranged on the inner wall of the groove 121 of the anti-dismounting screw 1, the second guide part matched with the first guide part is arranged on the boss 21 of the batch head 2, and the boss 21 of the batch head 2 can be smoothly clamped into the groove 121 corresponding to the anti-dismounting screw 1 due to the guiding function of the mutual matching of the second guide part and the first guide part even if the boss 21 on the batch head 2 and the corresponding groove 121 slightly deviate through the matching of the second guide part and the first guide part, so that the batch head 2 and the anti-dismounting screw 1 can be conveniently aligned.
In the embodiment of the invention, the outer surface of the screw rod 11 is provided with double threads, so that the hole opening capability of the screw rod 11 is improved.
In the embodiment of the invention, the nut 12 and the screw rod 11 are integrally formed, so that the processing of the anti-dismantling screw 1 is facilitated.
In the embodiment of the invention, the number of the grooves 121 is 3-5, the number of the bosses 21 on the batch head 2 is consistent with that of the grooves 121 of the anti-dismounting screws 1, and the arrangement positions of the bosses 21 on the batch head 2 are matched with the grooves 121. Be 3 ~ 5 through the quantity with recess 121, both promoted wholesale head 2 and prevented tearing open the counterpoint ability of screw 1, and be convenient for prevent tearing open screw 1 and wholesale head 2's processing.
Referring again to fig. 5, as an embodiment of the present invention, the number of the grooves 121 is three, three grooves 121 are uniformly spaced around the central axis of the nut 12, and an included angle θ 1 formed by the central lines of two adjacent grooves 121 is 120 °.
In this embodiment, the number of the bosses 21 on the batch head 2 is three, and the setting positions of the three bosses 21 are matched with the setting positions of the three grooves 121 of the tamper screw 1.
In this embodiment, the number of the grooves 121 is three, and the included angle θ 1 formed by the center lines of two adjacent grooves 121 is 120 °. When the batch head 2 is aligned with the anti-dismounting screw 1, the batch head 2 can be aligned with the three grooves 121 of the anti-dismounting screw 1 once rotating 120 degrees, so that the probability that the boss 21 of the batch head 2 is buckled into the groove 121 of the anti-dismounting screw 1 is greatly improved, and the alignment capability of the batch head 2 and the anti-dismounting screw 1 is effectively improved; moreover, after the alignment capability of the screwdriver head 2 and the anti-dismantling screw 1 is improved, the problem that the screwdriver head 2 idles due to the fact that the screwdriver head 2 cannot be buckled into the groove 121 of the anti-dismantling screw 1 can be effectively solved, and the problem that the anti-dismantling screw 1 cannot be in place due to idling of the screwdriver head 2 and the product is damaged due to the fact that the anti-dismantling screw 1 is inclined is solved.
In this embodiment, the number of the grooves 121 is three, and the three bosses 21 on the screwdriver head 2 can stabilize the nut 12 of the anti-removal screw 1 by using the principle that three points can fix one plane, so that the anti-removal screw 1 is not easy to damage a product due to deflection when being locked.
In this embodiment, the groove 121 is a square groove, which facilitates the processing of the groove 121. In addition, the groove 121 may be provided in other shapes.
As an embodiment of the present invention, the edge of the groove 121 is provided with an opening communicating with the outside of the nut 12, so as to increase the design size of the outer diameter of the boss 21 on the bit 2, thereby increasing the strength of the bit 2.
Referring again to fig. 7, as an embodiment of the present invention, the first guiding portion is a first inclined surface 123 forming a predetermined included angle with the central axis of the nut 12, and the second guiding portion is a second inclined surface 211 disposed to cooperate with the first inclined surface 123. Criticize first boss 21 on 2 and prevent tearing open recess 121 of screw 1 when counterpointing, through the cooperation of first inclined plane 123 with second inclined plane 211 to play the guide effect when getting into recess 121 to boss 21, even criticize first boss 21 on 2 and the slight off normal of recess 121 that corresponds, criticize first boss 21 of 2 also can block smoothly and prevent tearing open in the recess 121 that screw 1 corresponds, make things convenient for criticizing first 2 and prevent tearing open the counterpoint of screw 1.
In a preferred embodiment of the present invention, the included angle α between the first inclined surface 123 and the central axis of the nut 12 is 5 to 10 °, and the included angle β between the second inclined surface 211 and the central axis of the bit body 20 is 20 to 30 °. The included angle alpha between the first inclined plane 123 and the central axis of the nut 12 is 5-10 degrees, the included angle beta between the second inclined plane 211 and the central axis of the screwdriver bit body 20 is 20-30 degrees, and good guiding effect of the first inclined plane 123 and the second inclined plane 211 is guaranteed.
As another embodiment of the present invention, the first guiding portion is a first arc surface, and the second guiding portion is a second arc surface disposed in cooperation with the first arc surface. When criticizing first 2 and preventing tearing open recess 121 of screw 1 counterpoint, through the cooperation of the second cambered surface on the boss 21 and the first cambered surface of recess 121 for criticize first 2 boss 21 can block smoothly in preventing tearing open recess 121 that screw 1 corresponds, conveniently criticize first 2 and prevent tearing open counterpoint of screw 1.
Referring to fig. 6 again, as an embodiment of the present invention, the groove 121 includes a bottom wall 1211, two first inner walls 1212 disposed on opposite sides of the bottom wall 1211, and a second inner wall 1213 connecting the two first inner walls 1212, the first guide portion is disposed on the second inner wall 1213, and an included angle between the first inner wall 1212 and the bottom wall 1211 is 85 to 95 °. Through setting up the contained angle of first inner wall 1212 with the diapire 1211 for recess 121 to 85 ~ 95, avoid criticizing first 2 and appear skidding when driving anti-disassembly screw 1 clockwise or anticlockwise rotation for the boss 21 of criticizing first 2 is difficult to follow recess 121 upper portion roll-off of anti-disassembly screw 1. In addition, the first guiding portion may be disposed on the first inner wall 1212.
As an embodiment of the present invention, the bottom of the boss 21 is provided with a first rounded corner 212 contacting the top of the nut 12 to reduce stress concentration, thereby enhancing the strength of the bit 2. The top of the boss 21 is provided with a second fillet 213 which can contact with the first inner wall 1212 of the groove 121, so as to avoid the sharp corner from scratching the anti-dismantling screw 1 and prevent the anti-dismantling screw 1 from rusting due to damage of the electroplated layer of the anti-dismantling screw 1.
The screw anti-dismounting device provided by the embodiment of the invention has the advantages that the at least three grooves distributed around the central axis of the nut are arranged on the nut of the anti-dismounting screw, and the isolating parts for isolating the at least three grooves from each other are arranged, so that the universal screwdriver heads in a straight shape or a cross shape and the like cannot be buckled into the grooves of the nut due to the existence of the isolating parts, and only the special screwdriver heads matched with the grooves of the anti-dismounting screw can be buckled into the grooves of the anti-dismounting screw, so that a user can be prevented from dismounting the anti-dismounting screw by adopting the universal screwdriver heads; simultaneously, through set up at least three recess on the nut of preventing tearing open the screw, improved the boss of criticizing the head greatly and prevented the lock rate of the recess of tearing open the screw, promoted the counterpoint ability of criticizing the head and preventing tearing open the screw. The inner wall of the groove of the anti-dismantling screw is provided with the first guide part, the boss of the screwdriver head is provided with the second guide part matched with the first guide part, and the boss of the screwdriver head can be smoothly clamped into the groove of the anti-dismantling screw under the guide effect of the mutual matching of the second guide part and the first guide part, so that the alignment of the screwdriver head and the anti-dismantling screw is facilitated.
Example two
Referring to fig. 8 to 10, the difference between the present embodiment and the first embodiment is that the groove 121 is an arc groove, and the boss 21 is an arc boss.
In this embodiment, through being the circular arc groove with recess 121, be favorable to increaseing the width of criticizing first 2 last boss 21 to can improve boss 21's intensity, and then improve the structural strength of criticizing first 2.
EXAMPLE III
Referring to fig. 11 to 12, the difference between the first embodiment and the second embodiment is that the number of the grooves 121 is four, four grooves 121 are uniformly distributed around the central axis of the nut 12 at intervals, and the included angle formed by the central lines of two adjacent grooves 121 is 90 °; the number of the bosses 21 on the batch head 2 is four, and the arrangement positions of the four bosses 21 are matched with the four grooves 121.
In this embodiment, when the screwdriver bit 2 is aligned with the anti-removal screw 1, the screwdriver bit 2 can be aligned with the four grooves 121 of the anti-removal screw 1 once when rotating 90 degrees, so that the probability that the boss 21 of the screwdriver bit 2 is buckled into the groove 121 of the anti-removal screw 1 is further improved, and the alignment capability of the screwdriver bit 2 and the anti-removal screw 1 is further improved.
In this embodiment, the groove 121 may be a square groove or an arc groove, and the shape of the boss 21 is matched with the shape of the groove 121. In addition, the groove 121 may be provided in other shapes.
In this embodiment, the groove 121 includes a bottom wall 1211, two first inner walls 1212 disposed on opposite sides of the bottom wall 1211, and a second inner wall 1213 connecting the two first inner walls 1212, the first guiding portion is disposed on the second inner wall 1213, and an included angle between the first inner wall 1212 and the bottom wall 1211 is 90 °. Through setting the included angle between the first inner wall 1212 of the groove 121 and the bottom wall 1211 to 90 °, the slipping phenomenon when the screwdriver bit 2 drives the anti-dismounting screw 1 to rotate clockwise or counterclockwise is avoided, so that the boss 21 of the screwdriver bit 2 is not easy to slip out from the upper part of the groove 121 of the anti-dismounting screw 1.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A screw anti-dismounting device is characterized by comprising an anti-dismounting screw and a batch head matched with the anti-dismounting screw;
the anti-dismantling screw comprises a screw rod with threads and a screw cap connected with one end of the screw rod, the screw cap is provided with at least three grooves distributed at intervals around the central axis of the screw cap and isolating parts for isolating the at least three grooves from each other, and the inner wall of each groove is provided with a first guiding part;
criticize the head including criticizing the head body, locate criticize on the head body and with the boss that the recess cooperation set up, be equipped with on the boss with the second guide part that the cooperation of first guide part set up, the boss can be correspondingly put into be used for revolving in the recess and twist prevent tearing open the screw.
2. The screw tamper device according to claim 1, wherein the number of the grooves is 3 to 5.
3. The screw detachment prevention device according to claim 1 or 2, wherein the number of the grooves is three, the three grooves are uniformly spaced around the central axis of the nut, and an included angle formed by center lines of two adjacent grooves is 120 °.
4. The screw detachment prevention device according to claim 1, wherein the first guide portion is a first inclined surface having a predetermined included angle with a central axis of the nut, and the second guide portion is a second inclined surface disposed to be engaged with the first inclined surface; or the first guide part is a first cambered surface, and the second guide part is a second cambered surface matched with the first cambered surface.
5. The screw detachment prevention device according to claim 4, wherein an included angle between the first inclined surface and the central axis of the nut is 5-10 °, and an included angle between the second inclined surface and the central axis of the bit body is 20-30 °.
6. The screw detachment prevention device according to claim 1, wherein the groove includes a bottom wall, two first inner walls disposed on opposite sides of the bottom wall, and a second inner wall connecting the two first inner walls, the first guide portion is disposed on the second inner wall, and an included angle between the first inner wall and the bottom wall is 85-95 °.
7. The utility model provides a prevent tearing open screw, its characterized in that, including establish the screwed screw rod and with the nut that screw rod one end is connected, the nut is equipped with the winding at least three recess that the axis of nut distributes and will the isolated portion that at least three recess kept apart each other, every the inner wall of recess is equipped with the first guide part that sets up with the cooperation of the second guide part of criticizing the head.
8. The tamper-evident screw of claim 7 wherein the first guide portion is a first inclined surface having a predetermined included angle with a central axis of the nut, and the second guide portion is a second inclined surface disposed in cooperation with the first inclined surface; or the first guide part is a first cambered surface, and the second guide part is a second cambered surface matched with the first cambered surface.
9. The utility model provides a criticize head, its characterized in that includes criticize first body, locates criticize first body on and with the boss that the recess cooperation of the nut of preventing tearing open the screw set up, the boss be equipped with the second guide part that the cooperation of the first guide part of nut set up, the boss can correspond to be put into be used for revolving in the recess and twist prevent tearing open the screw.
10. The screwdriver bit as claimed in claim 9, wherein the first guiding portion is a first inclined surface having a predetermined included angle with the central axis of the nut, and the second guiding portion is a second inclined surface disposed in cooperation with the first inclined surface; or the first guide part is a first cambered surface, and the second guide part is a second cambered surface matched with the first cambered surface.
CN201910886994.4A 2019-09-19 2019-09-19 Screw anti-dismounting device, anti-dismounting screw and screwdriver bit Pending CN110608222A (en)

Priority Applications (1)

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CN201910886994.4A CN110608222A (en) 2019-09-19 2019-09-19 Screw anti-dismounting device, anti-dismounting screw and screwdriver bit

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Application Number Priority Date Filing Date Title
CN201910886994.4A CN110608222A (en) 2019-09-19 2019-09-19 Screw anti-dismounting device, anti-dismounting screw and screwdriver bit

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CN110608222A true CN110608222A (en) 2019-12-24

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1458090A (en) * 1973-09-08 1976-12-08 Yamamoto Byora Co Ltd Fastener element
US20080145181A1 (en) * 2004-12-23 2008-06-19 Lynes Benjamin C Tamper Resistant Fastener
CH700315A2 (en) * 2009-01-28 2010-07-30 Zollmann Gmbh Clamping system for clamping tool shank in tool holder of machine tool, has recess e.g. outwardly running recess, provided for receiving lug of spanner and provided with undercut for gripping lug of spanner
JP3164217U (en) * 2010-09-07 2010-11-18 進發 李 Nut and socket assembly for driving the nut
CN201696439U (en) * 2010-04-14 2011-01-05 浙江吉利汽车研究院有限公司 Screw with anti-dismounting structure
CN102562754A (en) * 2010-12-28 2012-07-11 鸿富锦精密工业（深圳）有限公司 Fastener, driving piece matched with fastener and punch forming fastener
CN203476985U (en) * 2013-09-02 2014-03-12 宋敬斌 Multi-purpose tamper screw and special-purpose wrench thereof
CN206206361U (en) * 2016-11-30 2017-05-31 郑州云海信息技术有限公司 A kind of anti-dismantle screw and extracting tool
CN210830057U (en) * 2019-09-19 2020-06-23 公牛集团股份有限公司 Screw anti-dismounting device, anti-dismounting screw and screwdriver bit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1458090A (en) * 1973-09-08 1976-12-08 Yamamoto Byora Co Ltd Fastener element
US20080145181A1 (en) * 2004-12-23 2008-06-19 Lynes Benjamin C Tamper Resistant Fastener
CH700315A2 (en) * 2009-01-28 2010-07-30 Zollmann Gmbh Clamping system for clamping tool shank in tool holder of machine tool, has recess e.g. outwardly running recess, provided for receiving lug of spanner and provided with undercut for gripping lug of spanner
CN201696439U (en) * 2010-04-14 2011-01-05 浙江吉利汽车研究院有限公司 Screw with anti-dismounting structure
JP3164217U (en) * 2010-09-07 2010-11-18 進發 李 Nut and socket assembly for driving the nut
CN102562754A (en) * 2010-12-28 2012-07-11 鸿富锦精密工业（深圳）有限公司 Fastener, driving piece matched with fastener and punch forming fastener
CN203476985U (en) * 2013-09-02 2014-03-12 宋敬斌 Multi-purpose tamper screw and special-purpose wrench thereof
CN206206361U (en) * 2016-11-30 2017-05-31 郑州云海信息技术有限公司 A kind of anti-dismantle screw and extracting tool
CN210830057U (en) * 2019-09-19 2020-06-23 公牛集团股份有限公司 Screw anti-dismounting device, anti-dismounting screw and screwdriver bit

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