CN111853018B - Donkey head pin and tensioning method - Google Patents
Donkey head pin and tensioning method Download PDFInfo
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- CN111853018B CN111853018B CN201910348097.8A CN201910348097A CN111853018B CN 111853018 B CN111853018 B CN 111853018B CN 201910348097 A CN201910348097 A CN 201910348097A CN 111853018 B CN111853018 B CN 111853018B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 241000283074 Equus asinus Species 0.000 title description 2
- 241001023788 Cyttus traversi Species 0.000 claims abstract description 109
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 description 11
- 241001331845 Equus asinus x caballus Species 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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- Mechanical Engineering (AREA)
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Abstract
The application discloses horse head pin and tight method that rises, this horse head pin includes: the device comprises a main body (1), a jackscrew (2), a hole (5) arranged in the main body (1), a pressing ball (7), an alignment ball (3) and a tensioning pin (4); the alignment ball (3) and the compression ball (7) are positioned in the hole (5), one end of the compression ball (7) is in contact with the jackscrew (2), and the other end of the compression ball is in contact with the alignment ball (3); the tensioning pin (4) is arranged on the inner wall of the hole (5), and one end of the tensioning pin is in contact with the alignment ball (3); when the jackscrew (2) extrudes the aligning ball (3) by extruding the pressing ball (7), so that the tensioning pin (4) is extruded through force conduction, and the other end of the tensioning pin (4) extrudes the inner wall of the horse head pin seat (8) until the inner wall is compacted. The problem that appears becoming flexible between horse head pin and the horse head key seat that appears approximately oval deformation can be solved in this application.
Description
Technical Field
The application relates to the technical field of oil field mechanical oil extraction equipment, in particular to a horse head pin and a tensioning method.
Background
This section is intended to provide a background or context to the embodiments of the invention. The description herein is not admitted to be prior art by inclusion in this section.
At present, most of mechanical oil extraction adopts a beam pumping unit, a horse head pin seat is arranged on a horse head and a walking beam of the pumping unit, and the horse head and the walking beam are connected together through a horse head pin. Because the horse head pin and the horse head pin seat bear alternating load action all the year round to generate abrasion, the horse head pin seat generates deformation similar to an ellipse, and the horse head pin is easy to shift out after being stressed, so that vibration is generated between the horse head and the walking beam; or, the horse head pin is easy to rust and die due to weather influences such as wind, frost, rain and snow, and the like, so that the horse head pin cannot be normally dismounted and mounted.
The existing horsehead pin only considers the anti-channeling prevention, such as 'fastening anti-channeling horsehead pin' disclosed in patent No. 201521066158, 'horsehead pin fixing device' disclosed in patent No. 201420690088.X, 'horsehead pin device' disclosed in patent No. 201510176528.9, 'novel horsehead pin' disclosed in patent No. 201520296611.5; or only the disassembly and assembly problems are considered, such as the oil pumping machine screwing type horse head pin disclosed in the patent number 201020580064.0, the oil pumping machine horse head pin disclosed in the patent number 201220007778.1, the oil pumping machine horse head pin disclosed in the patent number 201220244046.4, the oil pumping machine horse head pin disclosed in the patent number 201420197417.7, the horse head pin disclosed in the patent number 201420673485.6, the walking beam type oil pumping machine horse head pin disclosed in the patent number 201620013051.2 and the novel self-locking oil pumping machine horse head pin disclosed in the patent number 201720216655.1; or the anti-channeling and the disassembly and assembly are considered, but the split type or taper sleeve type integral compensation is adopted mostly, for example, "expanding and contracting type mule head pin of the pumping unit" disclosed in the patent number 200910133497.3, "wedging type mule head pin of the pumping unit" disclosed in the patent number 201420121938.4, "self-locking mule head pin device" disclosed in the patent number 201611039652.1(201621259520.5), and "a taper sleeve type mule head pin of the pumping unit" disclosed in the patent number 201620592266.4.
The horse head pin disclosed above can not well solve the problem that the horse head pin seat is loosened from the horse head pin after being deformed approximately into an ellipse, and the tensioning purpose can not be achieved.
The existing molding expansion shaft technology mostly adopts hydraulic pressure or pneumatic pressure, needs to increase a power source, and has the problem of pressure stabilization, such as an 'improved expansion shaft' disclosed in the patent number 95197752.0 and an 'expandable shaft' disclosed in the patent number 200980154988.4; or, the adopted mechanical structure is complicated and can not meet the existing requirements, such as the 'amorphous expansion shaft' disclosed in the patent number 98102911.6, the 'mechanical expansion shaft' disclosed in the patent number 200810041798.9, the 'novel expansion shaft' disclosed in the patent number 200820148554.6 and the 'mechanical expansion shaft' disclosed in the patent number 200920157338.2. Or, only three-point positioning can be realized, multi-directional compensation tensioning cannot be met, and the problem that different directions and different magnitudes of deformation are generated at different positions of the same part cannot be effectively solved, such as the handle type positioning locking pin disclosed in the patent No. 201621238348.5 and the cover plate type drill clamp tensioning device disclosed in the patent No. 200320112514.3.
The expansion shaft technology disclosed above cannot compensate well for the looseness of deformation quantities in different directions and different sizes, which occur at different positions up and down between the mule head pin and the mule head pin seat in the existing mechanical oil extraction. The three-point positioning is not enough to overcome the huge alternating load generated between the horse head and the horse head pin boss in the working process, the stable, effective and safe operation requirements of the equipment cannot be ensured, and the three-point positioning is not in accordance with the actual field.
In conclusion, the problem that looseness occurs between the horse head pin and the horse head pin seat due to deformation of the horse head pin seat or other conditions in the prior art cannot be well solved.
Disclosure of Invention
First aspect, the embodiment of this application provides a horse head pin for provide diversified compensation, solve the horse head pin and appear appearing the not hard up problem of appearance between the horse head key seat of approximate oval deformation, this horse head pin includes:
the device comprises a main body 1, a jackscrew 2, a hole 5 arranged in the main body 1, a pressing ball 7, an alignment ball 3 and a tension pin 4; the alignment ball 3 and the compression ball 7 are positioned in the hole 5, one end of the compression ball 7 is in contact with the jackscrew 2, and the other end of the compression ball 7 is in contact with the alignment ball 3; the tensioning pin 4 is arranged on the inner wall of the hole 5, and one end of the tensioning pin is in contact with the alignment ball 3; when the jackscrew 2 extrudes the aligning ball 3 by extruding the pressing ball 7, so that the tensioning pin 4 is extruded through force conduction, the other end of the tensioning pin 4 extrudes the inner wall of the horse head pin seat 8 until the inner wall is compacted.
In a second aspect, an embodiment of the present application further provides a tensioning method, so as to solve the problem that looseness occurs between a horse head pin and a horse head pin seat with an approximately elliptical deformation, where the method includes:
extruding the jackscrew 2; when the jackscrew 2 extrudes the aligning ball 3 by extruding the pressing ball 7, so that one end of the tensioning pin 4 contacted with the aligning ball 3 is extruded by force conduction, and the other end of the tensioning pin 4 extrudes the inner wall of the horse head pin seat 8 until the inner wall is compressed.
In the embodiment of the application, through installing the alignment ball additional in horse head pin inside and rising the tight round pin, utilize the alignment spheroid free roll to promote to rise the tight round pin and remove along equidirectional, appear not hard up back between horse head pin and horse head key seat like this, the alignment ball can be extruded to the extrusion jackscrew, further extrudees the tight round pin that rises, makes the tight inner wall of the tight horse head key seat of tight pressure of rising, reaches and rises, prevents scurrying the purpose. In addition, the direction of the pressing force of the pressing ball and the direction of the pressing force of the aligning ball are adjusted twice, so that the tensioning pins can be controlled to move along respective stress directions, the multi-point tensioning effect can be realized, and the defects that three-point positioning is formed and omnibearing compensation cannot be realized in the prior art are overcome.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a side view of a horse head pin according to an embodiment of the present application;
FIG. 2(a) is a cross-sectional schematic view of a horse head pin according to the embodiment of the present application;
FIG. 2(b) is another sectional view of the horse head pin according to the embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a force analysis of the aligning ball 31 in the embodiment of the present application;
FIG. 4 is a force analysis diagram of the alignment ball 32 in the embodiment of the present application;
fig. 5 is a flowchart of a tensioning method in an embodiment of the present application.
Reference numerals
1: a main body 2: jackscrew
3. 31, 32: alignment balls 4, 41, 42, 43, 44: tensioning pin
5: holes 6: ring set
7: and (3) pressing the ball 8: horse head pin seat
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present application are provided herein to explain the present application and not to limit the present application.
The embodiment of the application provides a horse head pin, as shown in fig. 1, this horse head pin includes main part 1, jackscrew 2, sets up in the inside hole 5 of main part 1, compresses tightly ball 7, alignment ball 3 and rises and tightly sell 4.
Wherein, alignment ball 3 and compress tightly ball 7 are located hole inside 5, compress tightly one end of ball 7 and contact with jackscrew 2, and the other end contacts with alignment ball 3.
The holes 5 are cylindrical. The diameter of the hole 5 is larger than the sum of the diameters of the two alignment balls 3, and the specific diameter of the hole 5 can be set according to the number and the diameter of the alignment balls 3, which is not limited herein.
The tensioning pin 4 is arranged on the inner wall of the hole 5, and one end of the tensioning pin is in contact with the alignment ball 3. When the jackscrew 2 extrudes the aligning ball 3 through the extruding pressing ball 7, so that the tensioning pin 4 is extruded through force conduction, and the other end of the tensioning pin 4 extrudes the inner wall of the horse head pin seat 8 until the inner wall is tightly pressed.
Wherein, the number of the pressing balls 7 is one, and the number of the alignment balls 3 is at least two. The pressing ball 7 and the at least two aligning balls 3 are divided into an upper layer and a lower layer and are arranged in the hole 5. Wherein, the compaction ball 7 is arranged on the upper layer and is contacted with the jackscrew 2; the at least two aligning balls 3 are arranged on the lower layer and are in contact with the tensioning pin 4.
The upper and lower layers of the pressing ball 7 and the aligning ball 3 are located at an upper position close to the jackscrew 2 and a lower position far from the jackscrew 2 relative to the jackscrew 2.
In an implementation manner of the embodiment of the present application, in order to ensure the stress balance of the tensioning pins 4, the number of the alignment balls 3 disposed on the lower layer is equal to the number of the tensioning pins 4; alternatively, the number of the aligning balls 3 provided in the lower layer is set to be half of the number of the tension pins 4. If the number of the alignment balls 3 arranged on the lower layer is equal to that of the tensioning pins 4, when the jackscrew 2 extrudes the pressing balls 7 so as to extrude the alignment balls 3, each alignment ball 3 extrudes one tensioning pin 4. If the number of the alignment balls 3 arranged on the lower layer is half of that of the tensioning pins 4, when the jackscrew 2 extrudes the pressing ball 7, and thus the alignment balls 3 are extruded, each alignment ball 3 extrudes two tensioning pins 4.
In one implementation manner of the embodiment of the present application, the number of the tensioning pins 4 is an even number greater than or equal to 4, and the specific number thereof is not limited herein.
In addition, the horse head pin is including setting up in two jackscrews 2 at main part 1 both ends, because the both ends of main part 1 contact with horse head key seat 8 respectively, in order to ensure that these both ends all closely fixed with horse head key seat 8, refer to fig. 1, set up hole 5, compress tightly ball 7, alignment ball 3 and tight round pin 4 that rises respectively at the both ends of main part 1, the ball 7 that compresses tightly of each end contacts with jackscrew 2 and alignment ball 3 with one end respectively.
In the present embodiment, the horse head pin further comprises a ring set 6. The ring set 6 is arranged at a contact position of the tensioning pin 4 and the main body 1 and used for filling a gap between the tensioning pin 4 and the main body 1, so that the tensioning pin 4 is prevented from sliding out of the main body 1 when no external force acts on the tensioning pin.
In the embodiment of the application, through at the inside alignment ball of installing additional of horse head pin and rise tight round pin, utilize the free roll of alignment ball 3 to promote to rise tight round pin and remove along equidirectional not, appear not hard up back between horse head pin and horse head key seat like this, the alignment ball can be extruded to the extrusion jackscrew, further extrudees the tight round pin that rises, makes the tight inner wall of the tight round pin key seat of tight pressure of tight round pin that rises, reaches and rises, prevents scurrying the purpose. In addition, the direction of the pressing force of the pressing ball and the direction of the pressing force of the aligning ball are adjusted twice, so that the tensioning pins can be controlled to move along respective stress directions, the multi-point tensioning effect can be realized, and the defects that three-point positioning is formed and omnibearing compensation cannot be realized in the prior art are overcome.
The following layers of the two aligning balls 31 and 32 and the 4 tensioning pins 41, 42, 43 and 44 are provided as an example to briefly describe the installation process of the horse head pin, and briefly describe the tensioning principle of the horse head pin in combination with the installation process of the horse head pin.
Referring to fig. 1, the tensioning pins 41, 42, 43, 44 are first installed into the body 1 and ensure that the outer surface of the body 1 is flush. Next, the body 1 is loaded into the predetermined mounting position in the horse head pin holder 8, and the aligning balls 31 and 32 in the lower layer are loaded again, at this time, since the tensioning pins 41, 42, 43, 44 occupy a part of the space of the hole 5, the positional relationship of the aligning balls 31 and 32 is one-over-one, and assuming that the position of the aligning ball 31 is on the upper side, the aligning ball 32 contacts the lower bottom surface of the hole 5. And then the pressing ball 7 is installed, and since the pressing ball 7 is not in contact with the tensioning pin, and no pressure is applied to the tensioning pin, the pressing ball 7 is not subjected to stress analysis in the embodiment of the application, and the jackscrew 2 is considered to directly apply pressure to the aligning balls 31 and 32.
After the pressing balls 7 are loaded, the jackscrew 2 is engaged with the body 1, and the jackscrew 2 is rotated to force the aligning balls 31, 32 to further press the tensioning pins 41, 42, 43, 44. The aligning ball 31 is under the action of the pressure of the jackscrew 2 and the thrust of the tensioning pins 41 and 42 in the main body 1 and also under the thrust of the aligning ball 32, and when the thrust of the aligning ball 31 is gradually increased, the tensioning pins 41 and 42 are pushed out of the main body 1 and pushed to the inner wall of the horse head pin seat 8; the aligning ball 32 is pushed by the aligning ball 31 and the expanding pins 43 and 44 and the upward supporting force of the lower bottom of the hole 5, and when the pushing force of the aligning ball 31 is increased, the expanding pins 43 and 44 are pushed out of the main body 1 and pushed to the inner wall of the horse head pin base 8. The length of the tensioning pins 41, 42, 43 and 44 pushed out of the main body 1 is consistent with the size of a gap between the main body 1 and the inner wall of the horse head pin base 8, after the tensioning pins 41, 42, 43 and 44 respectively press the inner wall of the horse head pin base 8, 4 tensioning pins do not move any more, the tensioning pins 41, 42, 43 and 44 are fed back to the aligning balls 31 and 32 by the acting force of the horse head pin base 8, the aligning balls 31 and 32 are not moved after the force is balanced, and the horse head pins and the horse head pin base 8 are completely tensioned. Therefore, the purpose of compensating the gap between the main body 1 and the horse head pin base 8 and tensioning the horse head pin and the horse head pin base 8 is achieved through the interaction between the alignment ball 3 and the tensioning pin 4.
For example, referring to fig. 2(a) and 2(b), two cross-sectional views of the horse head pin in the embodiment of the present application are shown, in which the horse head pin seat 8 is deformed in a nearly elliptical shape, and the contact position of the tension pin 4 and the horse head pin seat 8 is different. As can be seen from fig. 2(a) and 2(b), no matter how large the horse head pin holder 8 deforms and how the horse head pin holder 8 deforms, the tensioning pin 4 can press the inner wall of the horse head pin holder 8, so as to compensate the gap between the main body 1 and the horse head pin holder 8, and achieve the tensioning purpose.
The following will perform a force analysis on the alignment balls 31 and 32 in the horse head pin provided in the embodiment of the present application with reference to fig. 2(a), fig. 2(b), fig. 3 and fig. 4, so as to further explain the tensioning principle of the horse head pin. Fig. 3 is a force analysis diagram of the aligning ball 31, and fig. 4 is a force analysis diagram of the aligning ball 32.
It should be noted that the stress conditions of the aligning balls 31 and 32 are complicated, and the present application simplifies the stress conditions to obtain the stress conditions shown in fig. 3 and 4.
When the jackscrew 2 is extruded, the jackscrew 2 is engaged with the main body 1 to transmit the force F1Applied to the aligning balls 31, the forces are transmitted to the tensioning pins 41 through the aligning balls 31 (F)2) Tension pin 43 (F)3) And an alignment ball 32 (F)4) (ii) a The aligning ball 32 receives a force (F) from the aligning ball 315) Then starts moving and continues to transmit force to the tensioning pin 43 (F)7) And a tensioning pin 44 (F)8). The alignment ball 31 and the alignment ball 32 are subjected to a force analysis model, and since the force analysis models of the alignment ball 31 and the alignment ball 32 are the same, the alignment ball 31 will be taken as an example for detailed analysis.
The aligning ball 31 is mainly pre-stressed by the vertical jackscrew 2 (F)1) And a horizontal direction tension pin 41 (F)2) And a tensioning pin 42 (F)3) Thrust of (F), aligning the force of the ball 324)，F4The directions form included angles with X, Y, Z coordinate axes. F is to be4Resolved into forces along axis X, Y, Z, respectively F4x、F4y、F4zWhen F is1When the size increases, the aligning ball 31 is pushed to generate a moving trend, F4With consequent increase, i.e. F4x、F4y、F4zAnd is increased. The aligning ball 31 is received F in the horizontal direction2And F4x、F3And F4yTwo pairs of force limitations, in the vertical direction by F1And F4zThe limit of (2).
When F is present1As this continues to increase, the alignment ball 31 continues to move downward, F4With consequent increase, i.e. F4x、F4y、F4zThe force balance of the aligning ball 32 is kept unchanged, and the force of the aligning ball 31 is divided into the following conditions:
(1)F2and F4xThe same size, i.e. the tensioning pin 41 is in contact with the horse head pin seat to be tensioned, F4yGreater than F3When the centering ball 31 is pushed, the tensioning pin 42 starts to move until the centering ball contacts with the horse head pin seat and is tensioned, namely F3And F4yThe sizes are equal, the aligning ball 31 does not move any more, and the stress balance is achieved.
(2)F3And F4yOf equal size, i.e. tensioning pins 42 andcontact expansion of the pin seat of the horse head F4xGreater than F2When the centering ball 31 is pushed, the tensioning pin 41 starts to move until the centering ball contacts with the horse head pin seat and is tensioned, namely F2And F4xThe sizes are equal, the aligning ball 31 does not move any more, and the stress balance is achieved.
(3)F2Less than F4x、F3Less than F4yWhen the centering ball 31 pushes the tensioning pin 41 and the tensioning pin 42 to start moving until the tensioning pin contacts and is tensioned with the horse head pin seat, namely F2Size equal to F4x、F3Size equal to F4yWhen the force is balanced, the aligning ball 31 does not move.
When F is continuously increased1While the aligning ball 31 continues to move downward, F4With consequent increase, i.e. F4x、F4y、F4zEnlarging, aligning the ball 32 to receive F4Reaction force F5The action, starting to move, the tension pin 43 and the tension pin 44 move similarly to the stress situation of the above-mentioned aligning ball 31, and are divided into 3 kinds, which are not described in detail again.
The embodiment of the application also provides a tensioning method applied to the horse head pin, as shown in fig. 5, the method includes steps 501 and 502:
and step 501, extruding the jackscrew.
In the embodiment of the application, through installing the alignment ball additional in horse head pin inside and rising the tight round pin, utilize the alignment spheroid free roll to promote to rise the tight round pin and remove along equidirectional, appear not hard up back between horse head pin and horse head key seat like this, the alignment ball can be extruded to the extrusion jackscrew, further extrudees the tight round pin that rises, makes the tight inner wall of the tight horse head key seat of tight pressure of rising, reaches and rises, prevents scurrying the purpose. In addition, the direction of the pressing force of the pressing ball and the direction of the pressing force of the aligning ball are adjusted twice, so that the tensioning pins can be controlled to move along respective stress directions, the multi-point tensioning effect can be realized, and the defects that three-point positioning is formed and omnibearing compensation cannot be realized in the prior art are overcome.
The above-mentioned embodiments are further described in detail for the purpose of illustrating the invention, and it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A horse head pin, characterized in that, the horse head pin includes:
the device comprises a main body (1), a jackscrew (2), a hole (5) arranged in the main body (1), a pressing ball (7), an alignment ball (3) and a tensioning pin (4);
the alignment ball (3) and the compression ball (7) are positioned in the hole (5), one end of the compression ball (7) is in contact with the jackscrew (2), and the other end of the compression ball is in contact with the alignment ball (3); the number of the pressing balls (7) is one, and the number of the alignment balls (3) is at least two; the pressing balls (7) and the at least two alignment balls (3) are divided into an upper layer and a lower layer and are arranged in the holes (5);
the tensioning pin (4) is arranged on the inner wall of the hole (5), and one end of the tensioning pin is in contact with the alignment ball (3); when the jackscrew (2) extrudes the aligning ball (3) by extruding the pressing ball (7), so that the tensioning pin (4) is extruded through force conduction, and the other end of the tensioning pin (4) extrudes the inner wall of the horse head pin seat (8) until the inner wall is compacted.
2. A horse head pin according to claim 1,
the pressing ball (7) is arranged on the upper layer and is in contact with the jackscrew (2); the at least two alignment balls (3) are arranged on the lower layer and are in contact with the tensioning pins (4).
3. A horse head pin according to claim 2,
the number of the alignment balls (3) is equal to that of the tensioning pins (4), or is half of that of the tensioning pins (4).
4. A horse head pin according to claim 3,
if the number of the aligning balls (3) is equal to the number of the tensioning pins (4), each aligning ball (3) presses one tensioning pin (4) when the jackscrew (2) presses the pressing ball (7) and thus the aligning balls (3).
5. A horse head pin according to claim 3,
if the number of the aligning balls (3) is half of the number of the tensioning pins (4), each aligning ball (3) presses two tensioning pins (4) when the jackscrew (2) presses the pressing ball (7) and thus the aligning ball (3).
6. A horse head pin according to claim 1,
the number of the tensioning pins (4) is an even number which is more than or equal to 4.
7. A horse head pin according to claim 1, characterized in that it comprises two jackscrews (2) arranged at both ends of the body (1);
the two ends of the main body (1) are respectively provided with a hole (5), a pressing ball (7), an alignment ball (3) and a tensioning pin (4), and the pressing ball (7) at each end is respectively contacted with the jackscrew (2) and the alignment ball (3) at the same end.
8. A horse head pin according to claim 1, further comprising:
and the ring sleeve piece (6) is arranged at the contact position of the tensioning pin (4) and the main body (1) and is used for filling the gap between the tensioning pin (4) and the main body (1).
9. A tensioning method applied to a horse head pin according to any one of claims 1 to 8, characterised in that the method comprises:
extruding the jackscrew (2);
when the jackscrew (2) extrudes the aligning ball (3) by extruding the pressing ball (7), so that one end of the tensioning pin (4) contacted with the aligning ball (3) is extruded by force conduction, and the other end of the tensioning pin (4) extrudes the inner wall of the horse head pin seat (8) until the inner wall is compacted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910348097.8A CN111853018B (en) | 2019-04-28 | 2019-04-28 | Donkey head pin and tensioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910348097.8A CN111853018B (en) | 2019-04-28 | 2019-04-28 | Donkey head pin and tensioning method |
Publications (2)
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| CN111853018A (en) | 2020-10-30 |
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