CN113431831A - One-way self-locking positioning pin device and use method thereof - Google Patents
One-way self-locking positioning pin device and use method thereof Download PDFInfo
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- CN113431831A CN113431831A CN202110702814.XA CN202110702814A CN113431831A CN 113431831 A CN113431831 A CN 113431831A CN 202110702814 A CN202110702814 A CN 202110702814A CN 113431831 A CN113431831 A CN 113431831A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 238000009434 installation Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 abstract description 15
- 238000003754 machining Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- 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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
Abstract
The invention discloses a unidirectional self-locking positioning pin device and a use method thereof, belonging to the technical field of machining accessories and comprising a ratchet mechanism, a positioning pin and a positioning block, the positioning pin comprises a cylindrical flattening section, a tool matching section and a part matching section, the middle part of the cylindrical flattening section is provided with a toothed flattening section, the diameter of the tool matching section is smaller than that of the part matching section, the positioning block is provided with a pin hole matched with the positioning pin, a ratchet wheel mounting groove for mounting a ratchet wheel mechanism is also arranged in the positioning block, after the positioning pin passes through the pin hole, the toothed flattening section of the positioning pin is meshed with the ratchet mechanism, so that the problem that when a horizontal processing machine tool is adopted to process a workpiece in the prior art is solved, the positioning pin on the machine tool is easy to move axially to extend out of the surface of the workpiece due to the horizontal state of the positioning pin and the influence of machining vibration, so that the positioning of the workpiece fails and the use safety of the machine tool is endangered.
Description
Technical Field
The invention belongs to the technical field of machining accessories, and particularly relates to a one-way self-locking positioning pin device and a using method thereof.
Background
In machining, the part being machined is typically positioned with a hole. The positioning mode is simple in principle and wide in application range, and the positioning of the parts is realized after the parts are installed into the positioning pins by taking the round holes as the reference. The common positioning pins are all in a smooth surface cylindrical structure, and the universal positioning pin has the advantages of simple structure, easiness in processing and manufacturing, convenience in assembly and disassembly during use, strong universality and capability of being repeatedly used.
However, under the machining and cutting vibration of the traditional positioning pin, the positioning pin can move along the axial direction to extend out of the surface of the workpiece, and particularly, the workpiece is machined by the existing horizontal machining machine tool. Because the locating pin is in the horizontality, perhaps even the downward sloping, if there is little external force or vibration to make the locating pin produce horizontal displacement this moment to the direction of displacement is that the locating pin leaves the part of being fixed a position, long time after tired up, the locating pin can be followed the work piece and fleed. After the positioning pin axially moves and extends out of the surface of the workpiece, the positioning pin is interfered and collided with a machining cutter, and even falls off from a tool positioning block, so that the positioning of the workpiece fails and the use safety of a machine tool is endangered.
In order to solve the problems, a screw is generally adopted to compress a positioning pin for locking, for example, a utility model patent with the application number of "CN 201821555000.8" and the name of "a screw compresses the positioning pin" disclosed by the national intellectual property office in 2019, 11, 5 and discloses a positioning pin device, wherein one screw is used to pass through and compress the positioning pin with a hollow internal structure, so as to realize the locking of the positioning pin.
However, in practical applications, it is found that if the aspect ratio of the compression screw is too large, new problems such as poor structural rigidity and high manufacturing difficulty of the compression screw may be caused, and the screw may be easily broken by a shearing force during use.
Disclosure of Invention
In order to solve the problems, the invention provides a one-way self-locking positioning pin device and a use method thereof, which can solve the problem that in the mechanical processing, when a horizontal processing machine tool is used for processing a workpiece, because the positioning pin is in a horizontal state and is influenced by processing vibration, the positioning pin on the machine tool is easy to shift along the axial direction and extend out of the surface of the workpiece, and then the positioning pin collides with a processing cutter in an interference manner, even falls from a tool positioning block, so that the positioning of the workpiece fails and the use safety of the machine tool is endangered.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a locating pin device of one-way auto-lock, includes ratchet, locating pin and locating piece, the locating pin includes cylinder section of flattening, frock cooperation section and part cooperation section, cylinder section of flattening middle part is equipped with takes the tooth section of flattening, the diameter of frock cooperation section is less than the diameter of part cooperation section, the locating piece is seted up the pinhole that matches with the locating pin, and the inside ratchet mounting groove that is used for installing ratchet that still is equipped with of locating piece, after the locating pin passed the pinhole, the tooth of locating pin section of flattening and ratchet meshing.
Further, the toothed flattening section comprises a toothed side and a flattening side, the width of the cylindrical flattening section is b, the width of the toothed flattening section is c, and the flattening amount of the flattening side is a = d-c.
Furthermore, two sides of the cylindrical flattening section are flattened, and the flattening direction of one side of the cylindrical flattening section is consistent with the flattening direction of the toothed flattening section; the other side of the cylindrical flattening section is opposite to the side flattening direction, the diameter of the tool matching section is d, and the single-side flattening amount a = (d-b)/2 of the cylindrical flattening section.
Further, the teeth on the toothed side of the toothed planing section are flat teeth or inclined teeth inclined downwards.
A use method of a positioning pin device uses the positioning pin device, and comprises the following steps:
A. the ratchet mechanism is arranged in a ratchet wheel installation groove of the positioning block, the diameter of a ratchet wheel is D, and the installation offset distance of the ratchet wheel is L; the ratchet wheel mounting offset distance L should satisfy the relationship: (D + D)/2> L > (D + D-2 a)/2;
B. before the part is machined, the flattened side of the positioning pin is back to the ratchet mechanism, passes through a part hole of the part and is inserted into a pin hole of the positioning block, and the ratchet mechanism is pressed to rotate anticlockwise in a single direction and is meshed with the side with the teeth, so that the part is fixed;
C. after the parts are machined, the flattened side of the positioning pin is rotated to the side facing the ratchet mechanism, and then the positioning pin can be taken out, and the parts are disassembled.
The beneficial effects of this technical scheme are as follows:
according to the positioning pin device, the specially designed positioning pin is meshed with the ratchet mechanism arranged in the ratchet wheel mounting groove, and the positioning pin cannot move reversely under the action of the ratchet mechanism in the part processing process, so that the axial fixing and one-way self-locking of the positioning pin are realized, the aim of stably fixing parts is fulfilled, and meanwhile, the problems that the positioning pin stretches out of the surface of a workpiece due to axial movement caused by processing vibration, interferes and collides with a processing cutter, even falls from a tool positioning block, causes the positioning failure of the workpiece and endangers the use safety of a machine tool can be effectively avoided.
The positioning pin device consisting of the positioning block, the positioning pin with the toothed cylinder and the ratchet mechanism is simple in structure, low in cost and easy to machine and manufacture, can be directly applied to the existing tool structure as a movable part, fixes the positioning block with the ratchet mechanism on the surface of the existing tool or in a groove, is matched with the toothed cylinder to be used simultaneously to realize the axial self-locking function of the positioning pin, is suitable for popularization and use, and can be taken out and disassembled after parts are machined only by rotating the flattened side of the positioning pin to the side facing the ratchet mechanism.
Thirdly, the toothed flattening section comprises a toothed side and a flattening side, and the positioning pin can be taken out by rotating the positioning pin after the part is machined by the aid of the structural design so that the flattening side of the positioning pin faces one side of the ratchet mechanism; the flattening amount a = d-c of the flattening side of the cylindrical flattening section is consistent with the single-side flattening amount of the cylindrical flattening section.
Fourthly, the invention provides a method for using the positioning pin device, and the ratchet wheel installation offset distance L satisfies the relation: (D + D)/2> L > (D + D-2a)/2, the toothed side of the positioning pin can be meshed with a ratchet wheel of the ratchet wheel mechanism, and the positioning pin is prevented from axially moving to extend out of the surface of a workpiece due to machine tool vibration.
Drawings
Fig. 1 is a schematic structural diagram of a unidirectional self-locking positioning pin device in use.
Fig. 2 is a schematic structural diagram of the unidirectional self-locking positioning pin device in the invention.
Fig. 3 is a front view of the locating pin arrangement.
Fig. 4 is a sectional view a-a of fig. 3.
Fig. 5 is a sectional view B-B of fig. 3.
FIG. 6 is a schematic view of the detent arrangement engaging the ratchet mechanism.
Wherein, 1, ratchet mechanism; 2. positioning pins; 3. positioning blocks; 4. a part; 2-1, a belt-toothed flattening section; 2-2, cylindrical flattening; 2-3, a tool matching section; 2-4, a part matching section; 3-1, pin holes; 3-2, a ratchet wheel mounting groove; 4-1, part holes; 2-1-1, toothed side; 2-1-2, and flattening the side.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
example 1
A positioning pin device with one-way self-locking belongs to the technical field of machining accessories and comprises a ratchet mechanism 1, a positioning pin 2 and a positioning block 3, wherein the positioning pin 2 comprises a cylindrical flattening section 2-2, a tool matching section 2-3 and a part matching section 2-4, referring to FIGS. 1 and 2, a toothed flattening section 2-1 is arranged in the middle of the cylindrical flattening section 2-2, the diameter of the tool matching section 2-3 is smaller than that of the part matching section 2-4, a pin hole 3-1 matched with the positioning pin 2 is formed in the positioning block 3, a ratchet mounting groove 3-2 used for mounting the ratchet mechanism 1 is further arranged in the positioning block 3, and after the positioning pin 2 penetrates through the pin hole 3-1, the toothed flattening section 2-1 of the positioning pin 2 is meshed with the ratchet mechanism 1.
This embodiment is the most basic embodiment, and by the specially designed detent pin 2 engaging with the ratchet mechanism 1 mounted in the ratchet mounting groove 3-2, when the ratchet wheel of the ratchet wheel mechanism 1 is installed, the rotation direction of the ratchet wheel is ensured to be unidirectional anticlockwise rotation after the installation, in the processing process of the part 4, the positioning pin 2 cannot move reversely under the action of the ratchet mechanism 1, so that the axial fixation and the one-way self-locking of the positioning pin 2 are realized, thereby achieving the purpose of stably fixing the part 4, solving the problems that when a horizontal processing machine tool is adopted to process a workpiece in mechanical processing, because the positioning pin 2 is in a horizontal state and is influenced by processing vibration, after the positioning pin 2 on the machine tool is easy to move along the axial direction and extend out of the surface of a workpiece, the workpiece is interfered and collided with a machining cutter and even falls off from the tool positioning block 3, so that the positioning of the workpiece is invalid and the use safety of the machine tool is endangered.
Example 2
The embodiment is a further improvement on embodiment 1, and relates to a one-way self-locking positioning pin device, which belongs to the technical field of machining accessories, and with reference to fig. 1-5, the specific structure comprises a ratchet mechanism 1, a positioning pin 2 and a positioning block 3, the positioning pin 2 comprises a cylindrical flattening section 2-2, a tool matching section 2-3 and a part matching section 2-4, the middle part of the cylindrical flattening section 2-2 is provided with a toothed flattening section 2-1, the diameter of the tool matching section 2-3 is smaller than that of the part matching section 2-4, the positioning block 3 is provided with a pin hole 3-1 matched with the positioning pin 2, a ratchet wheel mounting groove 3-2 for mounting the ratchet wheel mechanism 1 is also arranged inside the positioning block 3, after the positioning pin 2 penetrates through the pin hole 3-1, the toothed flattening section 2-1 of the positioning pin 2 is meshed with the ratchet mechanism 1.
Further, the toothed flattening section 2-1 comprises a toothed side 2-1-1 and a flattening side 2-1-2, the width of the cylindrical flattening section 2-2 is b, the width of the toothed flattening section 2-1 is c, and the flattening amount a = d-c of the flattening side 2-1-2.
Furthermore, two sides of the cylindrical flattening section 2-2 are flattened, and the flattening direction of one side of the cylindrical flattening section 2-2 is consistent with the flattening direction of the toothed flattening section 2-1; the other side of the cylindrical flattening section 2-2 is opposite to the side flattening direction, the diameter of the tool matching section 2-3 is d, and the single-side flattening amount a = (d-b)/2 of the cylindrical flattening section 2-2.
Further, the teeth of the toothed side 2-1-1 of the toothed planing section 2-1 are flat teeth.
In yet another embodiment of the present invention, the teeth of the toothed side 2-1-1 of the toothed flattened section 2-1 can be designed as oblique teeth sloping downwards.
Example 3
In this embodiment, a specific part is processed on a horizontal processing machine, the part 4 to be processed is fixed on a workbench, and the positioning pin 2 device with one-way self-locking is used to pass through a part hole 4-1 on the part 4 to be processed and fixed on the workbench.
Referring to fig. 1-6, the unidirectional self-locking positioning pin device comprises a ratchet mechanism 1, a positioning pin 2 and a positioning block 3, the positioning pin 2 comprises a cylindrical flattening section 2-2, a tool matching section 2-3 and a part matching section 2-4, the middle part of the cylindrical flattening section 2-2 is provided with a toothed flattening section 2-1, the diameter of the tool matching section 2-3 is smaller than that of the part matching section 2-4, the positioning block 3 is provided with a pin hole 3-1 matched with the positioning pin 2, a ratchet wheel mounting groove 3-2 for mounting the ratchet wheel mechanism 1 is also arranged inside the positioning block 3, after the positioning pin 2 penetrates through the pin hole 3-1, the toothed flattening section 2-1 of the positioning pin 2 is meshed with the ratchet mechanism 1, so that the positioning pin 2, the positioning block 3 and the part 4 to be processed are axially fixed and self-locked.
After the positioning pin 2 fixes the part 4, the part matching section 2-4 of the positioning pin is contacted with the part 4 to be processed, the tool matching section 2-3 is contacted with the positioning block 3, and the toothed flattening section 2-1 of the cylindrical flattening section 2-2 is mainly meshed with the ratchet mechanism 1, so that the self-locking of the positioning pin 2 is realized.
Further, the belt tooth flattening section 2-1 comprises a belt tooth side 2-1-1 and a flattening side 2-1-2, as shown in fig. 3-4, the diameter d of the tool matching section 2-3 is 16mm, the width c of the belt tooth flattening section 2-1 is 14mm, and the flattening amount a = d-c of the flattening side 2-1-2 is 2 mm.
Furthermore, two sides of the cylindrical flattening section 2-2 are flattened, and the flattening direction of one side of the cylindrical flattening section 2-2 is consistent with the flattening direction of the toothed flattening section 2-1; the other side of the cylindrical flattening section 2-2 is opposite to the side flattening direction, the width b of the cylindrical flattening section 2-2 is 12mm, and the single-side flattening amount a = (d-b)/2 of the cylindrical flattening section 2-2.
Furthermore, the bottom of the positioning block 3 is also provided with a mounting hole, and the positioning block 3 passes through the mounting hole through fasteners such as screws and is fixed on a workbench of a machine tool.
The use method of the one-way self-locking positioning pin device comprises the following steps:
A. the ratchet wheel mechanism 1 is arranged in a ratchet wheel installation groove 3-2 of the positioning block 3, and when the ratchet wheel of the ratchet wheel mechanism 1 is installed, the rotation direction of the ratchet wheel after installation is ensured to be unidirectional anticlockwise rotation, as shown in figure 6, the diameter of the ratchet wheel is 25mm, and the installation offset distance of the ratchet wheel is 19 mm; the ratchet wheel mounting offset distance L satisfies the relationship: (D + D)/2> L > (D + D-2 a)/2;
B. before a part 4 is machined, the flattened side 2-1-2 of the positioning pin 2 is back to the ratchet mechanism 1, passes through a part hole 4-1 of the part 4 and is inserted into a pin hole 3-1 of the positioning block 3, the ratchet mechanism 1 is pressed to rotate anticlockwise in a single direction and is meshed with the toothed side 2-1-1, namely the part 4 is fixed, and the positioning pin 2 cannot move reversely due to the action of the ratchet mechanism 1 in the machining process of the part 4;
C. after the part 4 is machined, the flattened side 2-1-2 of the positioning pin 2 is rotated to the side facing the ratchet mechanism 1, and then the positioning pin 2 can be taken out, and the part 4 is disassembled.
By adopting the unidirectional self-locking positioning pin device and the use method thereof in the embodiment, after a plurality of tests, the situation that the positioning pin 2 moves along the axial direction and extends out of the surface of a workpiece does not occur, the situation that the positioning pin 2 falls off from the tool positioning block 3 does not occur, the problems of workpiece positioning failure, machine tool cutter bumping and the like caused by the falling of the positioning pin 2 do not occur, and the expected design requirements are met.
The above-mentioned embodiments are further described in detail for the purpose of illustrating the invention, the technical solutions and the advantages, it should be understood that the above-mentioned embodiments are only exemplary of the invention, and are not intended to limit the invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the invention should be included in the protection scope of the invention.
Claims (5)
1. The utility model provides a locating pin device of one-way auto-lock which characterized in that: comprises a ratchet mechanism (1), a positioning pin (2) and a positioning block (3), wherein the positioning pin (2) comprises a cylindrical flattening section (2-2), a tool matching section (2-3) and a part matching section (2-4), the middle part of the cylindrical flattening section (2-2) is provided with a toothed flattening section (2-1), the diameter of the tool matching section (2-3) is smaller than that of the part matching section (2-4), the positioning block (3) is provided with a pin hole (3-1) matched with the positioning pin (2), a ratchet wheel mounting groove (3-2) for mounting the ratchet wheel mechanism (1) is also arranged inside the positioning block (3), after the positioning pin (2) penetrates through the pin hole (3-1), the toothed flattening section (2-1) of the positioning pin (2) is meshed with the ratchet mechanism (1).
2. A one-way self-locking locating pin device according to claim 1, wherein: the belt-tooth flattening section (2-1) comprises a belt-tooth side (2-1-1) and a flattening side (2-1-2), the width of the cylindrical flattening section (2-2) is b, the width of the belt-tooth flattening section (2-1) is c, and the flattening amount of the flattening side (2-1-2) is a = d-c.
3. A one-way self-locking locating pin device according to claim 2, wherein: both sides of the cylindrical flattening section (2-2) are flattened, and the flattening direction of one side of the cylindrical flattening section (2-2) is consistent with the flattening direction of the toothed flattening section (2-1); the other side of the cylindrical flattening section (2-2) is opposite to the side flattening direction, the diameter of the tool matching section (2-3) is d, and the single-side flattening amount a = (d-b)/2 of the cylindrical flattening section (2-2).
4. A one-way self-locking locating pin device according to claim 3, wherein: the teeth of the toothed side (2-1-1) of the toothed flattening section (2-1) are flat teeth or inclined teeth inclined downwards.
5. A method of using a locating pin device, characterized in that the locating pin device of claim 3 or 4 is used, comprising the steps of:
A. the ratchet wheel mechanism (1) is arranged in a ratchet wheel installation groove (3-2) of the positioning block (3), the diameter of a ratchet wheel is D, and the installation offset distance of the ratchet wheel is L; the ratchet wheel mounting offset distance L should satisfy the relationship: (D + D)/2> L > (D + D-2 a)/2;
B. before the part (4) is machined, the flattened side (2-1-2) of the positioning pin (2) is back to the ratchet mechanism (1), penetrates through a part hole (4-1) of the part (4) and is inserted into a pin hole (3-1) of the positioning block (3), the ratchet mechanism (1) is pressed to rotate anticlockwise in a single direction and is meshed with the toothed side (2-1-1), and the part (4) is fixed;
C. after the part (4) is processed, the flattened side (2-1-2) of the positioning pin (2) is rotated to the side facing the ratchet mechanism (1), and then the positioning pin (2) can be taken out, and the part (4) is disassembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110702814.XA CN113431831A (en) | 2021-06-24 | 2021-06-24 | One-way self-locking positioning pin device and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110702814.XA CN113431831A (en) | 2021-06-24 | 2021-06-24 | One-way self-locking positioning pin device and use method thereof |
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| Publication Number | Publication Date |
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| CN113431831A true CN113431831A (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110702814.XA Pending CN113431831A (en) | 2021-06-24 | 2021-06-24 | One-way self-locking positioning pin device and use method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7862987A (en) * | 1986-09-17 | 1988-03-24 | Richard Kennedy Smith | Portable locking device |
| JP2005016679A (en) * | 2003-06-27 | 2005-01-20 | Taiyo Tekko Kk | Variable-length pipe |
| GB2443897A (en) * | 2006-11-17 | 2008-05-21 | Novar Ed & S Ltd | Ratchet mechanism for service outlet box with lid frame |
| US20080250825A1 (en) * | 2007-04-13 | 2008-10-16 | Karl Lai | Security padlock having a secondary locking system |
| CN201293034Y (en) * | 2008-10-17 | 2009-08-19 | 陈元民 | Rapidly mounting or dismounting spanner |
| CN202381497U (en) * | 2011-12-31 | 2012-08-15 | 张吉志 | Anti-tripping device for crank pin of oil pumping unit |
| US20150010372A1 (en) * | 2013-07-08 | 2015-01-08 | Lockon Llc | Ratcheting fastener |
| CN105332980A (en) * | 2015-10-24 | 2016-02-17 | 戚善鸣 | Convex-concave engaging type telescopic positioning device |
| CN209586916U (en) * | 2019-03-15 | 2019-11-05 | 义乌工商职业技术学院 | Can anti-dropout nut bolt protective device |
-
2021
- 2021-06-24 CN CN202110702814.XA patent/CN113431831A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7862987A (en) * | 1986-09-17 | 1988-03-24 | Richard Kennedy Smith | Portable locking device |
| JP2005016679A (en) * | 2003-06-27 | 2005-01-20 | Taiyo Tekko Kk | Variable-length pipe |
| GB2443897A (en) * | 2006-11-17 | 2008-05-21 | Novar Ed & S Ltd | Ratchet mechanism for service outlet box with lid frame |
| US20080250825A1 (en) * | 2007-04-13 | 2008-10-16 | Karl Lai | Security padlock having a secondary locking system |
| CN201293034Y (en) * | 2008-10-17 | 2009-08-19 | 陈元民 | Rapidly mounting or dismounting spanner |
| CN202381497U (en) * | 2011-12-31 | 2012-08-15 | 张吉志 | Anti-tripping device for crank pin of oil pumping unit |
| US20150010372A1 (en) * | 2013-07-08 | 2015-01-08 | Lockon Llc | Ratcheting fastener |
| CN105332980A (en) * | 2015-10-24 | 2016-02-17 | 戚善鸣 | Convex-concave engaging type telescopic positioning device |
| CN209586916U (en) * | 2019-03-15 | 2019-11-05 | 义乌工商职业技术学院 | Can anti-dropout nut bolt protective device |
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Application publication date: 20210924 |