CN109989976B - Steel pin capable of eliminating pores - Google Patents

Steel pin capable of eliminating pores Download PDF

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Publication number
CN109989976B
CN109989976B CN201910230968.6A CN201910230968A CN109989976B CN 109989976 B CN109989976 B CN 109989976B CN 201910230968 A CN201910230968 A CN 201910230968A CN 109989976 B CN109989976 B CN 109989976B
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CN
China
Prior art keywords
steel pin
supporting block
steel
pin body
block
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CN201910230968.6A
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Chinese (zh)
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CN109989976A (en
Inventor
陈士通
马遥
赵曼
刘嘉武
张耀辉
王金良
张茂江
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Shijiazhuang Tiedao University
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Shijiazhuang Tiedao University
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Priority to CN201910230968.6A priority Critical patent/CN109989976B/en
Publication of CN109989976A publication Critical patent/CN109989976A/en
Priority to PCT/CN2020/072988 priority patent/WO2020192261A1/en
Priority to GB2004313.9A priority patent/GB2586902B/en
Application granted granted Critical
Publication of CN109989976B publication Critical patent/CN109989976B/en
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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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
    • F16B13/0816—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation with a wedging drive-pin
    • 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
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/14—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening using wedges
    • 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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • 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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/10—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate gripping parts moved into their final position in relation to the body of the device by a separate operation
    • 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
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/12—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with locking-pins or split-pins thrust into holes
    • 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
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002—Measures against loss of bolts, nuts or pins

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Insertion Pins And Rivets (AREA)
  • Connection Of Plates (AREA)

Abstract

The invention relates to a steel pin capable of eliminating pores, which comprises a cylindrical steel pin body, a supporting block, a tension rod and a limiting bolt, wherein the cylindrical steel pin body is provided with a plurality of holes; two ends of the steel pin body are provided with pressing devices; adjusting nuts are arranged at two ends of the tension rod; after the limiting bolt is connected with the threaded hole, the vertical distance between the top end of the limiting bolt and the axis of the tension rod is larger than the radius of the pin hole at the position to be connected, so that the displacement and falling of the steel pin caused by vibration when the structure bears dynamic load can be prevented, when the limiting bolt is contacted with the steel pin body, the gap between the steel pin body and the pin hole is just eliminated, the gasket can prevent the adjusting nut from loosening, and the left supporting block and the right supporting block from being damaged in the tensioning process; the invention has simple structure, convenient installation and reliable performance.

Description

Steel pin capable of eliminating pores
Technical Field
The invention relates to a steel pin capable of eliminating pores, and belongs to the technical field of pin joint of engineering structures or mechanical parts.
Background
The pin joint is a common force transmission structure form, has the characteristics of simple structure, definite force transmission and convenient and fast installation, and is widely applied to engineering structures and mechanical engineering. In actual engineering, a certain gap is reserved between the pin shaft and the pin hole for facilitating installation, and the existence of the gap often has adverse effects on the structure. In order to improve the rush-repair speed, equipment for emergency repair, such as six-four railway military beams, 321 steel bridges, ZB200 steel bridges and other members are connected in a pin joint mode, and the holes of the equipment can enable the structure to generate inelastic displacement, so that the internal force and deformation are increased, and the normal use of the structure is affected. Some mechanical pin joint components are often in a severe working environment or bear a complex alternating load, and the unbalance loading caused by the pores can increase local stress, aggravate structural vibration and greatly shorten the service life of the components. In addition, many machine parts can meet the condition of using the hole location in processing and inspection process, and the location mode is generally for using the locating pin axle, and the fit clearance in locating pin axle and hole often can lead to installation error.
Disclosure of Invention
The invention aims to solve the technical problem of providing a steel pin which has simple structure, definite force transmission and convenient and fast installation and can eliminate pores.
The invention adopts the following technical scheme:
the invention comprises a cylindrical steel pin body, a supporting block, a tension rod and a limit bolt; pressing devices are arranged at two ends of the steel pin body; the middle part of the steel pin body is axially provided with a shaft hole A, and the middle part of the supporting block is provided with a shaft hole B which is coaxial with the shaft hole A; the steel pin body comprises more than three equal parts of steel pin blocks which are uniformly arranged in the axial direction of the ring, and each steel pin block is obliquely arranged from two ends of the shaft hole A to two ends of the top of the steel pin block; the inclination of the inclined plane of the steel pin block is the same as that of the outer wall of the supporting block, and a limiting guide device is correspondingly arranged between the inclined plane of the steel pin block and the outer wall of the supporting block; the supporting block is a circular truncated cone body and comprises a left supporting block and a right supporting block which are symmetrically arranged, the left supporting block and the right supporting block are respectively inserted into circular truncated cone holes in two sides of the steel pin body, the tension rod is installed in the shaft hole A and the shaft hole B, and adjusting nuts are installed at two ends of the tension rod; the limiting bolts are respectively and correspondingly installed on the outer sides of the end parts of the left supporting block and the right supporting block, and the vertical distance between the top ends of the limiting bolts and the axis of the tensioning rod is larger than the radius of the pin hole at the position to be connected.
The steel pin blocks are 4, and the rings are axially and uniformly arranged.
The limiting and guiding device comprises key grooves arranged on each inclined surface of a steel pin block and flat keys which are respectively fixed on the outer walls of a left supporting block and a right supporting block and are inserted into the corresponding key grooves in a matching mode.
The pressing device comprises annular grooves arranged at two ends of a steel pin body and elastic rings arranged in the annular grooves and provided with pretightening force.
The outer side ends of the left supporting block and the right supporting block are respectively provided with a threaded hole, the limiting bolt is in threaded connection with the threaded holes, the top of the limiting bolt is provided with a connecting chain, and the other end of the connecting chain is connected with the end part of the steel pin block.
The invention provides a washer between the adjusting nut and the end of the bearing block.
When the adjusting nut is loosened, the clearance between the steel pin blocks is eliminated under the action of the pretightening force of the elastic ring to form a stable structure, and the outer diameter of the structure is phi1Outer diameter phi1Smaller than the inner diameter of the pin hole at the part to be connectedφThis state is the steel pin reserve state.
According to the invention, the adjusting nut of the steel pin body in a storage state is screwed down, the left supporting block and the right supporting block are extruded inwards by utilizing the pretightening force of the adjusting nut, each steel pin block is propped open along the annular direction by the extrusion action, and the outer diameter phi of the steel pin body is increased i By increasing the outer diameter phi of the steel pin body1To eliminate the installation clearance between the steel pin body and the pin hole when the outer diameter phi of the steel pin body i Increasing to the outer diameter phi in the use state2The force is stopped at time phi2Andφare equal.
When the adjusting nut is screwed down, the limiting bolt gradually approaches the edge of the steel pin block along with the inward direction of the left supporting block and the right supporting block, and when the outer diameter phi of the steel pin body is smaller i Increase to phi2During the process, the limiting bolt is attached to the edge of the end part of the steel pin block, and the gap between the steel pin body and the pin hole is eliminated.
The invention screws the adjusting nut to ensure that the outer diameter phi of the steel pin body i The increase, it can guarantee not to change at the annular relative position of steel round pin body diameter increase in-process between the inclined plane of steel round pin piece and the supporting block outer wall to correspond to set up spacing guider, and the position takes place the skew when avoiding the steel round pin piece to bear external load.
The invention has the following positive effects: the elastic ring is a rubber ring, the natural inner diameter of the elastic ring is smaller than the outer diameter of the annular groove, and the elastic ring is arranged in the annular groove to apply pre-tightening force to the steel pin block. When the adjusting nut is loosened, under the action of the pretightening force of the elastic ring, the gaps among the 4 steel pin blocks are eliminated, the steel pin blocks become an integral body, namely a storage state, and the outer diameter of the steel pin is phi at the moment1Outer diameter phi1Smaller than the place to be joinedInner diameter of pin holeφAnd the installation is convenient. In addition, the elastic ring can enable the steel pin block and the supporting block to be always attached tightly, so that the good integrity of the invention is maintained.
The adjusting nut of the steel pin body in the storage state is screwed down, the left supporting block and the right supporting block are inwards extruded by the aid of pretightening force of the adjusting nut, 4 steel pin blocks are propped open along the annular direction under the extrusion action, the outer diameter of the steel pin body is increased, the installation gap between the steel pin and the pin hole is eliminated through the increase of the outer diameter of the steel pin body, and adverse effects of the hole on engineering structures, mechanical parts and the like can be effectively avoided.
The adjusting nut is screwed up to ensure that the outer diameter phi of the steel pin body i (Φ i Is a variable, phi in reserve state i =Φ1The variable phi in the increasing process i Increased to phi in the use state i =Φ2) The increase corresponds between the inclined plane of steel round pin piece and the supporting block outer wall and sets up spacing guider and can guarantee that both annular relative position do not change at steel round pin body diameter increase in-process, has the clearance between 4 steel round pin pieces in the steel round pin body diameter increase in-process promptly, and if there is not spacing guider spacing, each steel round pin piece probably takes place to rotate the skew in the atress process, and the position is stable when guaranteeing that the steel round pin piece bears external load.
After the limiting bolt is connected with the threaded hole, the vertical distance between the top end of the limiting bolt and the axis of the tension rod is larger than the radius of the pin hole at the position to be connected, so that the steel pin can be prevented from shifting and falling off due to vibration when the structure bears dynamic load, and when the limiting bolt is contacted with the steel pin, the gap between the steel pin body and the pin hole is just eliminated and can also be used as a basis for judging whether the gap between the pin hole is eliminated; the washer can prevent that adjusting nut is not hard up, avoids damaging left supporting block and right supporting block simultaneously in taut process.
The invention has simple structure, convenient installation and reliable performance.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 4 is a schematic sectional view taken along line B-B of FIG. 1;
FIG. 5 is a schematic view of the installation process of the present invention;
FIG. 6 is a schematic structural diagram of the present invention in use.
In the drawings: 1 steel pin block, 2 annular grooves, 3 key grooves, 41 left supporting blocks, 42 right supporting blocks, 5 flat keys, 6 threaded holes, 7 limiting bolts, 8 connecting chains, 9 tension rods, 10 shaft holes A, 11 adjusting nuts, 12 washers, 13 elastic rings, 14 shaft holes B and 15 pin holes.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in the attached drawings 1-4, the invention comprises a cylindrical steel pin body, a supporting block, a tension rod 9 and a limit bolt 7; pressing devices are arranged at two ends of the steel pin body; a shaft hole A10 is axially arranged in the middle of the steel pin body, and a shaft hole B14 which is coaxial with the shaft hole A10 is arranged in the middle of the supporting block; the steel pin body comprises steel pin blocks 1 which are uniformly arranged in the axial direction and are more than three equal parts, the number of the steel pin blocks 1 is 4 in the embodiment, and the 4 steel pin blocks 1 are uniformly arranged in the axial direction; each steel pin block 1 is obliquely arranged from two ends of the shaft hole A10 to two ends of the top of the steel pin block 1; the supporting block is a circular truncated cone body and comprises a left supporting block 41 and a right supporting block 42 which are symmetrically arranged, the left supporting block 41 and the right supporting block 42 are respectively inserted into circular truncated cone holes in two ends of the steel pin body, the circular truncated cone holes 4 are holes formed in the inner sides of inclined planes of the steel pin body after the steel pin body is axially and uniformly arranged, the inclination of the inclined plane of the steel pin block 1 is the same as that of the outer wall of the supporting block, and a limiting guide device is correspondingly arranged between the inclined plane of the steel pin block 1 and the outer wall of the supporting block; the tension rod 9 is installed in the shaft hole A10 and the shaft hole B14, and adjusting nuts 11 are installed at two ends of the tension rod 9; the limiting bolt 7 is respectively and movably mounted on the outer sides of the end portions of the left supporting block 41 and the right supporting block 42 correspondingly, and the vertical distance between the top end of the limiting bolt 7 and the axis of the tensioning rod 9 is larger than the radius of a pin hole at a position to be connected.
As shown in fig. 2 and 4, the limiting guide device of the invention comprises a key groove 3 arranged on each inclined surface of the steel pin block 1 and a flat key 5 arranged on the outer wall of the left supporting block 41 and the right supporting block 42 respectively and inserted with the corresponding key groove 3 in a matching way.
As shown in the attached drawings 1 and 2, the pressing device comprises annular grooves 2 arranged at two ends of a steel pin body and elastic rings 13 with pretightening force arranged in the annular grooves 2, the elastic rings 13 are rubber rings, threaded holes 6 are respectively arranged at the outer side ends of a left supporting block 41 and a right supporting block 42, a limiting bolt 7 is in threaded connection with the threaded holes 6, and after the limiting bolt 7 is in threaded connection with the threaded holes 6, the vertical distance between the top end of the limiting bolt 7 and the axis of a tension rod 9 is greater than the radius of a pin hole 15 at the position to be connected; and a connecting chain 8 is arranged at the top of the limiting bolt 7, and the other end of the connecting chain 8 is connected with the end part of the steel pin block 1. After the steel pin body is inserted into the pin hole 15, the limiting bolt 7 is conveniently installed in the threaded hole 6, and the washer 12 is arranged between the adjusting nut 11 and the end part of the supporting block.
As shown in the attached figures 5 and 6, when the adjusting nut 11 is loosened, under the action of the pretightening force of the elastic ring 13, the gaps among the 4 steel pin blocks 1 are eliminated, and the steel pin blocks are in a reserve state as a whole, and the outer diameter of the steel pin blocks is phi at the moment1Outer diameter phi1Smaller than the inner diameter of the pin hole at the part to be connectedφ. The adjusting nut 11 of the steel pin body in a storage state is screwed, the left supporting block 41 and the right supporting block 42 are extruded inwards by the pretightening force of the adjusting nut 11, 4 steel pin blocks 1 are expanded along the annular direction by the extrusion action, and the outer diameter phi of the steel pin body is increased i By increasing the outer diameter phi of the steel pin body i To eliminate the installation clearance between the steel pin body and the pin hole 15 when the outer diameter phi of the steel pin body i Increasing to the outer diameter phi in the use state2The force is stopped at time phi2Andφequal, phi i Is a variable, phi in reserve state i =Φ1The variable phi in the increasing process i Increased to phi in the use state i =Φ2. The adjusting nut 11 is screwed down to ensure that the outer diameter phi of the steel pin body i The increase, it can guarantee that the annular relative position of both does not change at steel pin body diameter increase in-process to correspond to set up spacing guider between the inclined plane of steel pin piece 1 and the supporting block outer wall, has the clearance between 4 steel pin pieces in steel pin body diameter increase in-process promptly, if do not have spacing guiderAnd the steel pin blocks are limited, and can rotate and deviate in the stress process, so that the steel pin blocks 1 are stable in position when bearing external loads.
When in use, the steel pin in the storage state is taken out, the adjusting nut 11 is in a relaxed state at the moment, the clearance between the steel pin blocks 1 is eliminated under the action of the pretightening force of the elastic ring 13, and the outer diameter phi of the steel pin body1(stored state) smaller than the inner diameter of the pin holeφ. And then, detaching the limiting bolt 7 from the threaded hole 6, inserting the steel pin body of the invention from one side of the pin hole 15 to be connected, mounting the limiting bolt 7 in place again in the threaded hole 6, screwing the adjusting nut 11 to ensure that the left supporting block 41 and the right supporting block 42 simultaneously press the steel pin blocks 1 inwards, and synchronously expanding the steel pin blocks 1 outwards. When the corresponding limit bolts 7 are respectively contacted with the steel pin body, the outer diameter phi of the steel pin body2(in use) and the inner diameter of the pin hole 15φThe exact equality indicates that the voids between the steel pin body and the inner wall of the pin bore 15 have been eliminated and the steel pin body of the present invention is installed in place.
The invention can adjust the outer diameter phi of the steel pin body i And the pores are eliminated, and the adverse effects of the pores on engineering structures and mechanical parts are avoided. The external diameter phi of the steel pin body in a storage state is enabled by the pretightening force of the elastic ring 13 i Is smaller than the inner diameter of the pin holeφThe installation is convenient, and the steel pin block 1 and the supporting block are always tightly attached to maintain good integrity. The limiting and guiding device can ensure that the circumferential relative positions of the steel pin body and the steel pin body do not change in the diameter increasing process, and the steel pin block 1 is prevented from shifting when bearing external load.
After the limiting bolt 7 is in threaded connection with the threaded hole 6, the vertical distance between the top end of the limiting bolt and the axis of the tension rod 9 is larger than the radius of the pin hole, so that the steel pin body can be prevented from falling out of the pin hole 15 when the device is used, the adjusting nut 11 can be prevented from loosening by the washer 12, and the left supporting block 41 and the right supporting block 42 can be prevented from being damaged in the tensioning process.
The invention has simple structure, convenient installation and reliable performance.

Claims (6)

1. A steel pin capable of eliminating pores is characterized by comprising a cylindrical steel pin body, a supporting block, a tension rod (9) and a limiting bolt (7); pressing devices are arranged at two ends of the steel pin body;
the middle part of the steel pin body is axially provided with a shaft hole A (10), and the middle part of the supporting block is provided with a shaft hole B (14) which is coaxial with the shaft hole A (10);
the steel pin body comprises more than three equal parts of steel pin blocks (1) which are uniformly arranged in the axial direction, and each steel pin block (1) is obliquely arranged from two ends of the shaft hole A (10) to two ends of the top of the steel pin block (1); the inclination of the inclined plane of the steel pin block (1) is the same as that of the outer wall of the supporting block, and a limiting guide device is correspondingly arranged between the inclined plane of the steel pin block (1) and the outer wall of the supporting block;
the supporting block is a circular truncated cone body and comprises a left supporting block (41) and a right supporting block (42) which are symmetrically arranged, and the left supporting block (41) and the right supporting block (42) are respectively inserted into circular truncated cone holes in two sides of the steel pin body;
the tensioning rod (9) is installed in the shaft hole A (10) and the shaft hole B (14), and adjusting nuts (11) are installed at two ends of the tensioning rod (9);
the limiting bolts (7) are respectively and correspondingly arranged on the outer sides of the end parts of the left supporting block (41) and the right supporting block (42), and the vertical distance between the top ends of the limiting bolts (7) and the axis of the tension rod (9) is greater than the radius of the pin holes (15) at the positions to be connected;
the number of the steel pin blocks (1) is 4, and the steel pin blocks are uniformly arranged in the axial direction of the ring;
the limiting and guiding device comprises key grooves (3) arranged on each inclined surface of the steel pin block (1) and flat keys (5) which are respectively fixed on the outer walls of the left supporting block (41) and the right supporting block (42) and are inserted into the corresponding key grooves (3) in a matching manner;
the pressing device comprises annular grooves (2) arranged at two ends of the steel pin body and elastic rings (13) with pretightening force and arranged in the annular grooves (2);
set up screw hole (6) respectively on the outside end of left side supporting block (41) and right supporting block (42), spacing bolt (7) and screw hole (6) threaded connection set up connecting chain (8) at spacing bolt (7) top, the connecting chain (8) other end and steel round pin piece (1) end connection.
2. A void-eliminating steel pin as claimed in claim 1, characterized in that a washer (12) is provided between the adjusting nut (11) and the end of the bearing block.
3. A steel pin with void elimination according to claim 1, characterized in that when the adjusting nut (11) is loosened, the clearance between the steel pin blocks (1) is eliminated under the pre-tightening force of the elastic ring (13) to form a stable structure, and the outer diameter is phi1Outer diameter phi1Smaller than the inner diameter of the pin hole at the part to be connectedφThis state is the steel pin reserve state.
4. The steel pin capable of eliminating the pores as claimed in claim 3, wherein the adjusting nut (11) of the steel pin body in a storage state is tightened, the left supporting block (41) and the right supporting block (42) are pressed inwards by the pretightening force of the adjusting nut (11), each steel pin block (1) is supported in the circumferential direction by the pressing action, and the outer diameter phi of the steel pin body is increased i By increasing the outer diameter phi of the steel pin body1To eliminate the installation clearance between the steel pin body and the pin hole (15) when the outer diameter phi of the steel pin body is smaller i Increasing to the outer diameter phi in the use state2The force is stopped at time phi2Andφare equal.
5. The steel pin capable of eliminating the pores as claimed in claim 4, wherein when the adjusting nut (11) is tightened, the limiting bolt (7) gradually approaches the edge of the steel pin block (1) along with the left supporting block (41) and the right supporting block (42) inwards when the outer diameter phi of the steel pin body is smaller i Increase to phi2During the process, the limiting bolt (7) is attached to the edge of the end part of the steel pin block (1), and the gap between the steel pin body and the pin hole (15) is eliminated.
6. A steel pin with void elimination according to claim 5, characterized in that tightening the adjusting nut (11) causes the steel pin body to have an outer diameter Φ i The increase, it can guarantee not to change at steel round pin body diameter increase in-process annular relative position between inclined plane and the supporting block outer wall of steel round pin piece (1) to correspond to set up spacing guider, and the skew takes place for the position when avoiding steel round pin piece (1) to bear external load.
CN201910230968.6A 2019-03-26 2019-03-26 Steel pin capable of eliminating pores Active CN109989976B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201910230968.6A CN109989976B (en) 2019-03-26 2019-03-26 Steel pin capable of eliminating pores
PCT/CN2020/072988 WO2020192261A1 (en) 2019-03-26 2020-01-19 Steel pin capable of eliminating gaps
GB2004313.9A GB2586902B (en) 2019-03-26 2020-03-25 Steel pin capable of eliminating installation clearance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910230968.6A CN109989976B (en) 2019-03-26 2019-03-26 Steel pin capable of eliminating pores

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Publication Number Publication Date
CN109989976A CN109989976A (en) 2019-07-09
CN109989976B true CN109989976B (en) 2021-06-29

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CN (1) CN109989976B (en)
GB (1) GB2586902B (en)
WO (1) WO2020192261A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109989976B (en) * 2019-03-26 2021-06-29 石家庄铁道大学 Steel pin capable of eliminating pores
CN111964856A (en) * 2020-07-16 2020-11-20 芜湖天航装备技术有限公司 Special pin shaft for vibration test of aviation launcher and use method thereof
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CN109989976A (en) 2019-07-09

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