CN112411365A - Universal anti-seismic support with combined partition, damper and lock - Google Patents
Universal anti-seismic support with combined partition, damper and lock Download PDFInfo
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- CN112411365A CN112411365A CN202011524946.XA CN202011524946A CN112411365A CN 112411365 A CN112411365 A CN 112411365A CN 202011524946 A CN202011524946 A CN 202011524946A CN 112411365 A CN112411365 A CN 112411365A
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- 238000005192 partition Methods 0.000 title description 5
- 238000002955 isolation Methods 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims abstract description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 12
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 12
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 12
- 230000035939 shock Effects 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 11
- 238000005265 energy consumption Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/048—Bearings being adjustable once installed; Bearings used in incremental launching
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Abstract
The invention provides a separation, reduction and locking combined type universal anti-seismic support which comprises a lower support plate, a lower sliding ring, a plurality of dampers, an upper sliding ring, an upper support plate and a connecting cylinder, wherein the lower support plate is connected with the lower sliding ring through the connecting cylinder; the beneficial technical effects of the invention are as follows: the support has the functions of shock isolation, shock absorption and self-resetting in medium and small earthquakes, and can exert the seismic potential of bridge members to the maximum extent in the earthquake of the ground.
Description
Technical Field
The invention relates to a bridge anti-seismic technology, in particular to a separation, reduction and locking combined type universal anti-seismic support.
Background
The plate-type rubber support has the advantages of simple structure, stable performance, economy, reliability, convenience in installation and replacement and the like, and is widely applied to bridges with medium and small spans. In the existing structural arrangement, a plate type rubber support is usually and directly arranged between a main beam and a lower pier, and special anchoring measures are not arranged among the beam bottom, the support and the pier base stone top, so that the plate type rubber support is simply stacked. The horizontal resistance of the weak connection supporting mode is mainly provided by the friction force of the horizontal contact surface between the top surface of the support and the bottom of the girder, and under the action of an earthquake, once the inertia force of the main girder exceeds the friction force, the main girder can slide on the top surface of the support. Due to the lack of anchoring measures, the sliding behavior of the main beam on the top surface of the support belongs to a random equilibrium state, and the support has no self-resetting capability and is difficult to resist the huge horizontal force generated by the action of an earthquake on the main beam. Engineering practices show that the plate-type rubber support is easy to slide and displace and is damaged by earthquakes, the proportion of the damage is close to 20%, a certain part of the damage even slides out of the pad stone to cause the support to fall off, the damage to the pier column is generally light, and the damage proportion is only 2%. The flexible and sliding actions of the plate type rubber support can generate certain shock insulation effect on a lower pier in a weak connection supporting mode, but displacement response of an upper structure of the bridge is out of control due to lack of self-resetting capability after sliding, and serious people can cause the shock damage with the worst effects of sitting, beam falling and the like.
Under the action of an earthquake, the bridge can realize a certain shock insulation effect on a lower pier by utilizing the sliding of the plate type rubber support, but does not have self-resetting and energy consumption capabilities. If the support can slide quantitatively, the shock insulation capability and the self-resetting capability of the support can be supplemented timely through structural compensation, and the shock resistance of the support can be optimized and greatly improved. On the other hand, because the pier stud has potential plasticity energy dissipation capacity under the traditional anti-seismic design, although the excessive accumulation of plastic deformation can cause irreversible damage to the pier stud and even lead to the whole collapse of the bridge, the limited utilization of the plasticity energy dissipation capacity of the pier stud can play a role in reducing the seismic response requirements of other bridge members, and meanwhile, the pier stud can be very conveniently repaired after the earthquake. In other words, it may be necessary to pay heavy cost to completely rely on the plastic energy consumption capability of the pier column to resist the earthquake action, and the limited use of the pier column plastic energy consumption (i.e. the pier column is used as the last earthquake-resistant defense line by means of the support) can maximize the earthquake-resistant potential of each component of the bridge. From the comprehensive view of excitation energy, the magnitude of sliding quantity and the difficulty of repairing after damage, the ideal anti-seismic mode is as follows: firstly isolating the earthquake, then absorbing the earthquake, and finally resisting the earthquake, wherein the earthquake corresponds to a small earthquake, a medium earthquake and a large earthquake respectively, namely the three-level earthquake-proof target of 'small earthquake isolation, medium earthquake absorption and large earthquake resistance' is realized by utilizing the support.
Disclosure of Invention
In order to realize the three-level anti-seismic target provided in the background technology, the invention provides a separation, reduction and lock combined type universal anti-seismic support, which has the following structure: the isolation, reduction and locking combined type universal anti-seismic support comprises a lower support plate, a lower sliding ring, a plurality of dampers, an upper sliding ring, an upper support plate and a connecting cylinder;
the upper end surface of the lower support plate is provided with a lower shear pin, a lower annular chute and a plurality of lower limiting hoops; the lower annular sliding groove is positioned at the periphery of the lower shear pin, and the lower shear pin and the lower annular sliding groove are coaxial; a polytetrafluoroethylene cushion layer is arranged on the surface of the lower annular chute; the lower limiting hoop is of a C-shaped structure, the opening of the lower limiting hoop faces downwards, the end surfaces of two sides of the opening of the lower limiting hoop are respectively an end A and an end B, the end A is connected with the end surface of the lower support plate on the inner side of the lower annular sliding groove, the end B is connected with the end surface of the lower support plate on the outer side of the lower annular sliding groove, and the end A and the end B are radially distributed along the lower annular sliding groove; the plurality of lower limiting hoops are distributed along the circumferential direction of the lower annular sliding groove; the bottom surface of the lower annular sliding chute is an arc surface;
the lower slip ring consists of a lower connecting ring, a plurality of lower universal joints, a lower connecting sleeve and a plurality of lower connecting rods; the lower universal joint is arranged on the upper side surface of the lower connecting ring, and the axial direction of the lower universal joint inclines towards the inner side of the lower connecting ring; the plurality of lower universal joints are distributed along the circumferential direction of the lower connecting ring; the lower connecting sleeve is coaxially arranged in an inner hole of the lower connecting ring; one end of the lower connecting rod is connected with the side wall of the inner side of the lower universal joint, the other end of the lower connecting rod is connected with the outer wall of the lower connecting sleeve, and the lower connecting rods correspond to the lower universal joints one by one; the number of the lower universal joints is the same as that of the lower limiting hoops;
the upper slip ring consists of an upper connecting ring, a plurality of upper universal joints, an upper connecting sleeve and a plurality of upper connecting rods; the outer diameter of the upper connecting ring is smaller than that of the lower connecting ring; the upper universal joint is arranged on the lower side surface of the upper connecting ring, and the axial direction of the upper universal joint is inclined upwards to the outer side of the upper connecting ring; the plurality of upper universal joints are distributed along the circumferential direction of the upper connecting ring, the number of the upper universal joints is the same as that of the lower universal joints, and the positions of the upper universal joints are in one-to-one correspondence; the upper connecting sleeve is coaxially arranged in an inner hole of the upper connecting ring; one end of the upper connecting rod is connected with the side wall of the inner side of the upper universal joint, the other end of the upper connecting rod is connected with the outer wall of the upper connecting sleeve, and the upper connecting rods correspond to the upper universal joints one by one;
the lower end face of the upper support plate is provided with an upper shear pin, an upper annular chute and a plurality of upper limiting hoops; the outer diameter of the upper annular sliding groove is smaller than that of the lower annular sliding groove; the upper annular sliding groove is positioned on the periphery of the upper shear pin, and the upper shear pin and the upper annular sliding groove are coaxial; a polytetrafluoroethylene cushion layer is arranged on the surface of the upper annular chute; the upper limiting hoop is of a C-shaped structure, the opening of the upper limiting hoop faces upwards, the end surfaces of two sides of the opening of the upper limiting hoop are respectively a C end and a D end, the C end is connected with the end surface of the upper support plate on the inner side of the upper annular sliding groove, the D end is connected with the end surface of the upper support plate on the outer side of the upper annular sliding groove, and the C end and the D end are radially distributed along the upper annular sliding groove; the upper limiting hoops are circumferentially distributed along the upper annular sliding groove; the number of the upper limiting hoops is the same as that of the lower limiting hoops; the bottom surface of the upper annular sliding chute is an arc surface;
the lower connecting ring is sleeved in a space surrounded by the lower limiting ring and the lower annular sliding groove, the bottom surface of the lower connecting ring is contacted with a polytetrafluoroethylene cushion layer in the lower annular sliding groove, a gap is reserved between the lower side surface of the lower connecting rod and the lower support plate, and the lower shearing pin is sleeved in an inner hole of the lower connecting sleeve; a lower universal joint is arranged between the adjacent lower limiting hoops;
the upper connecting ring is sleeved in a space surrounded by the upper limiting ring and the upper annular sliding groove, the top surface of the upper connecting ring is contacted with a polytetrafluoroethylene cushion layer in the upper annular sliding groove, a gap is reserved between the upper side surface of the upper connecting rod and the upper support plate, and the upper shear pin is sleeved in an inner hole of the upper connecting sleeve; an upper universal joint is arranged between every two adjacent upper limiting hoops;
the positions of the upper universal joint and the lower universal joint are in one-to-one correspondence; the upper universal joint and the lower universal joint which correspond to each other in position are connected through a damper; the upper connecting sleeve and the lower connecting sleeve are opposite in position, the connecting cylinder is arranged between the upper connecting sleeve and the lower connecting sleeve, and two ends of the connecting cylinder are fixed with the upper connecting sleeve and the lower connecting sleeve respectively.
The structural strength of the shear pin is smaller than that of the connecting cylinder, and the structural strength of the connecting cylinder is smaller than that of the connecting rods.
The working principle of the invention is as follows: as can be seen from the foregoing solutions, a structural body (hereinafter referred to as an intermediate) formed by the lower slip ring, the damper, the connecting cylinder, and the upper slip ring is relatively independent from the lower support plate and the upper support plate; during specific implementation, a plurality of universal anti-seismic supports are arranged on a supporting structure (such as a bent cap), a lower support plate is fixedly connected with the supporting structure, a main beam is arranged on the plurality of universal anti-seismic supports, and an upper support plate is fixedly connected with the bottom surface of the main beam; because the bottom surfaces of the upper and lower annular sliding grooves are cambered surfaces, the upper and lower ends (namely the upper and lower sliding rings) of the intermediate body can respectively contact with the central areas of the bottoms of the upper and lower annular sliding grooves under the action of the gravity of the main beam.
After an earthquake occurs, if the earthquake is small (namely the acting force caused by the earthquake is smaller than the design value of the shear pin), the universal anti-seismic support consumes earthquake energy mainly from 2 aspects: 1) elastic deformation of the shear pin; 2) relative sliding of the annular chute and the intermediate body; through the relative slip of annular spout and midbody, make universal antidetonation support can play fine shock insulation in the small earthquake to, after the earthquake effect disappears, because the bottom surface of upper and lower annular spout is the cambered surface, the lower extreme of midbody will reply initial position under the girder action of gravity, thereby make the structure can realize from restoring to the throne the function under the small earthquake condition.
If the earthquake is further enhanced (namely the acting force caused by the earthquake is greater than the design value of the shear pin), the shear pin is firstly sheared, so that the connection strength between the supporting structure and the main beam is weakened, the relative sliding quantity of the annular sliding groove and the intermediate body can be further increased, in addition, the limiting hoop, the connecting cylinder, the damper and the connecting rod also start to play a role, the limiting hoop can play a limiting role in the torsional displacement of the universal joint, the connecting cylinder and the connecting rod absorb energy through elastic deformation, and when the connecting cylinder and the connecting rod are elastically deformed, the damper also synchronously plays a damping role; after the earthquake action disappears, the sliding ring can return to the initial position under the action of the gravity of the main beam due to the fact that the bottom surfaces of the upper annular sliding groove and the lower annular sliding groove are cambered surfaces, and therefore the self-resetting function of the structure can be achieved under the medium-sized earthquake condition.
If the earthquake is further enhanced, the connecting cylinder and the connecting rod are subjected to bending shear damage, and after the connecting cylinder and the connecting rod are damaged, the connection strength between the supporting structure and the main beam can be further weakened, at the moment, the upper sliding ring and the lower sliding ring are limited by the damper and the limiting hoop, and the supporting structure and the main beam are indirectly limited; before the damper and the limiting hoop are completely damaged, if the relative positions of the supporting structure and the main beam are locked, the shock resistance can be realized by utilizing the plastic energy consumption capacity of the lower pier stud; if the earthquake increases until the damper and the spacing hoop are completely destroyed, the earthquake is beyond the reach of manpower.
The above explanation shows that, with the earthquake action from weak to strong, the invention can provide three functions of shock insulation (before shearing the shear pin), shock absorption (after shearing the shear pin and before shearing the connecting cylinder) and shock resistance (after shearing the connecting cylinder and before completely damaging the damper and the limiting hoop) in stages, and in the middle and small earthquakes, the structure can have self-resetting capability, and in the last stage, the shock resistance can be realized by using the plastic energy consumption capability of the pier stud at the lower part, thereby protecting the integrity of the main structure of the bridge to the maximum extent.
The beneficial technical effects of the invention are as follows: the support has the functions of shock isolation, shock absorption and self-resetting in medium and small earthquakes, and can exert the seismic potential of bridge members to the maximum extent in the earthquake of the ground.
Drawings
FIG. 1, the structure of the present invention, exploded;
FIG. 2 is a side view of the structure of the present invention;
FIG. 3 is a half sectional view of the structure of the present invention;
FIG. 4 is a state diagram of the use of the present invention;
FIG. 5 is a cross-sectional view of the damper illustrating the first embodiment (in an unstretched state);
FIG. 6, a cross-sectional view of the damper illustrating a second embodiment (in tension);
the names corresponding to each mark in the figure are respectively: the anti-seismic support comprises a lower support plate 1, a lower shear pin 1a, a lower annular sliding groove 1b, a lower limiting hoop 1c, a lower sliding ring 2, a lower connecting ring 2a, a lower universal joint 2b, a lower connecting sleeve 2c, a lower connecting rod 2d, a damper 3, a shell 3a, an expansion rod 3b, a spring 3c, a partition plate 3d, an upper sliding ring 4, an upper connecting ring 4a, an upper universal joint 4b, an upper connecting sleeve 4c, an upper connecting rod 4d, an upper support plate 5, an upper shear pin 5a, an upper annular sliding groove 5b, an upper limiting hoop 5c, a connecting cylinder 6, a main beam 7, a supporting structure 8 and a universal anti-seismic support 9.
Detailed Description
A separate, subtract, lock universal antidetonation support of combined type, its structure is: the isolation, reduction and locking combined type universal anti-seismic support comprises a lower support plate 1, a lower sliding ring 2, a plurality of dampers 3, an upper sliding ring 4, an upper support plate 5 and a connecting cylinder 6;
the upper end surface of the lower support plate 1 is provided with a lower shear pin 1a, a lower annular sliding groove 1b and a plurality of lower limiting hoops 1 c; the lower annular sliding groove 1b is positioned at the periphery of the lower shear pin 1a, and the lower shear pin 1a and the lower annular sliding groove 1b are coaxial; a polytetrafluoroethylene cushion layer is arranged on the surface of the lower annular chute 1 b; the lower limiting hoop 1C is of a C-shaped structure, the opening of the lower limiting hoop 1C faces downwards, the end surfaces of two sides of the opening of the lower limiting hoop 1C are respectively an A end and a B end, the A end is connected with the end surface of the lower support plate 1 on the inner side of the lower annular sliding groove 1B, the B end is connected with the end surface of the lower support plate 1 on the outer side of the lower annular sliding groove 1B, and the A end and the B end are distributed along the radial direction of the lower annular sliding groove 1B; the lower limiting hoops 1c are circumferentially distributed along the lower annular sliding groove 1 b; the bottom surface of the lower annular chute 1b is a cambered surface;
the lower slip ring 2 consists of a lower connecting ring 2a, a plurality of lower universal joints 2b, a lower connecting sleeve 2c and a plurality of lower connecting rods 2 d; the lower universal joint 2b is arranged on the upper side surface of the lower connecting ring 2a, and the axial direction of the lower universal joint 2b inclines towards the inner side of the lower connecting ring 2 a; the lower universal joints 2b are distributed along the circumferential direction of the lower connecting ring 2 a; the lower connecting sleeve 2c is coaxially arranged in an inner hole of the lower connecting ring 2 a; one end of a lower connecting rod 2d is connected with the side wall of the inner side of the lower universal joint 2b, the other end of the lower connecting rod 2d is connected with the outer wall of the lower connecting sleeve 2c, and the lower connecting rods 2d correspond to the lower universal joints 2b one by one; the number of the lower universal joints 2b is the same as that of the lower limiting hoops 1 c;
the upper slip ring 4 consists of an upper connecting ring 4a, a plurality of upper universal joints 4b, an upper connecting sleeve 4c and a plurality of upper connecting rods 4 d; the outer diameter of the upper connecting ring 4a is smaller than that of the lower connecting ring 2 a; the upper universal joint 4b is arranged on the lower side surface of the upper connecting ring 4a, and the axial direction of the upper universal joint 4b is inclined upwards to the outer side of the upper connecting ring 4 a; the plurality of upper universal joints 4b are distributed along the circumferential direction of the upper connecting ring 4a, the number of the upper universal joints 4b is the same as that of the lower universal joints 2b, and the positions of the upper universal joints are in one-to-one correspondence; the upper connecting sleeve 4c is coaxially arranged in an inner hole of the upper connecting ring 4 a; one end of an upper connecting rod 4d is connected with the side wall of the inner side of the upper universal joint 4b, the other end of the upper connecting rod 4d is connected with the outer wall of the upper connecting sleeve 4c, and the upper connecting rods 4d correspond to the upper universal joints 4b one by one;
the lower end face of the upper support plate 5 is provided with an upper shear pin 5a, an upper annular sliding groove 5b and a plurality of upper limit hoops 5 c; the outer diameter of the upper annular chute 5b is smaller than that of the lower annular chute 1 b; the upper annular sliding groove 5b is positioned at the periphery of the upper shear pin 5a, and the upper shear pin 5a and the upper annular sliding groove 5b are coaxial; a polytetrafluoroethylene cushion layer is arranged on the surface of the upper annular chute 5 b; the upper limiting hoop 5C is of a C-shaped structure, the opening of the upper limiting hoop 5C faces upwards, the end surfaces of two sides of the opening of the upper limiting hoop 5C are respectively a C end and a D end, the C end is connected with the end surface of the upper support plate 5 on the inner side of the upper annular sliding groove 5b, the D end is connected with the end surface of the upper support plate 5 on the outer side of the upper annular sliding groove 5b, and the C end and the D end are radially distributed along the upper annular sliding groove 5 b; a plurality of upper limit hoops 5c are circumferentially distributed along the upper annular sliding groove 5 b; the number of the upper limiting hoops 5c is the same as that of the lower limiting hoops 1 c; the bottom surface of the upper annular sliding groove 5b is a cambered surface;
the lower connecting ring 2a is sleeved in a space surrounded by the lower limiting hoop 1c and the lower annular sliding groove 1b, the bottom surface of the lower connecting ring 2a is contacted with a polytetrafluoroethylene cushion layer in the lower annular sliding groove 1b, a gap is reserved between the lower side surface of the lower connecting rod 2d and the lower support plate 1, and the lower shear pin 1a is sleeved in an inner hole of the lower connecting sleeve 2 c; a lower universal joint 2b is arranged between the adjacent lower limiting hoops 1 c;
the upper connecting ring 4a is sleeved in a space surrounded by the upper limiting hoop 5c and the upper annular sliding groove 5b, the top surface of the upper connecting ring 4a is in contact with a polytetrafluoroethylene cushion layer in the upper annular sliding groove 5b, a gap is reserved between the upper side surface of the upper connecting rod 4d and the upper support plate 5, and the upper shear pin 5a is sleeved in an inner hole of the upper connecting sleeve 4 c; an upper universal joint 4b is arranged between the adjacent upper limiting hoops 5 c;
the positions of the upper universal joints 4b and the lower universal joints 2b are in one-to-one correspondence; the upper universal joint 4b and the lower universal joint 2b which correspond to each other in position are connected through the damper 3; the upper connecting sleeve 4c and the lower connecting sleeve 2c are opposite in position, the connecting cylinder 6 is arranged between the upper connecting sleeve 4c and the lower connecting sleeve 2c, and two ends of the connecting cylinder 6 are respectively fixed with the upper connecting sleeve 4c and the lower connecting sleeve 2 c;
the structural strength of the shear pin is less than that of the connecting cylinder 6, and the structural strength of the connecting cylinder 6 is less than that of the connecting rods.
Referring to fig. 5 and 6, to enhance the performance of the damper 3, the inventor has added a partition plate 3d in the housing 3a of the damper 3, the middle part and the inner end of the telescopic rod 3 are added with conical structures which can effectively increase the friction force between the telescopic rod 3 and the damping material (the damping material is arranged in the inner cavity of the shell 3 a), and when the damper 3 is stretched to a certain degree, the two conical structures on the telescopic rod 3 can respectively form a blocking with the port of the shell 3a and the partition plate 3d, so that the stretching resistance of the damper 3 is improved, in addition, a spring 3c is arranged outside the shell 3a, when the damper 3 is not extended, the spring 3c is in a natural state (two ends of the spring 3c are fixed on connecting discs at two ends of the damper 3), when the damper 3 is extended, the spring 3c is also extended, and at this time, the restoring force of the spring 3c also acts as a damping action.
Claims (1)
1. The utility model provides a separate, subtract, lock the universal antidetonation support of combined type which characterized in that: the isolation, reduction and locking combined type universal anti-seismic support comprises a lower support plate (1), a lower sliding ring (2), a plurality of dampers (3), an upper sliding ring (4), an upper support plate (5) and a connecting cylinder (6);
the upper end surface of the lower support plate (1) is provided with a lower shear pin (1 a), a lower annular sliding groove (1 b) and a plurality of lower limiting hoops (1 c); the lower annular sliding groove (1 b) is positioned at the periphery of the lower shear pin (1 a), and the lower shear pin (1 a) and the lower annular sliding groove (1 b) are coaxial; a polytetrafluoroethylene cushion layer is arranged on the surface of the lower annular chute (1 b); the lower limiting hoop (1C) is of a C-shaped structure, the opening of the lower limiting hoop (1C) faces downwards, the end surfaces of the two sides of the opening of the lower limiting hoop (1C) are respectively an A end and a B end, the A end is connected with the end surface of the lower support plate (1) on the inner side of the lower annular sliding chute (1B), the B end is connected with the end surface of the lower support plate (1) on the outer side of the lower annular sliding chute (1B), and the A end and the B end are radially distributed along the lower annular sliding chute (1B); the lower limiting hoops (1 c) are circumferentially distributed along the lower annular sliding groove (1 b); the bottom surface of the lower annular sliding chute (1 b) is a cambered surface;
the lower slip ring (2) consists of a lower connecting ring (2 a), a plurality of lower universal joints (2 b), a lower connecting sleeve (2 c) and a plurality of lower connecting rods (2 d); the lower universal joint (2 b) is arranged on the upper side surface of the lower connecting ring (2 a), and the axial direction of the lower universal joint (2 b) inclines towards the inner side of the lower connecting ring (2 a); the lower universal joints (2 b) are distributed along the circumferential direction of the lower connecting ring (2 a); the lower connecting sleeve (2 c) is coaxially arranged in an inner hole of the lower connecting ring (2 a); one end of the lower connecting rod (2 d) is connected with the side wall of the inner side of the lower universal joint (2 b), the other end of the lower connecting rod (2 d) is connected with the outer wall of the lower connecting sleeve (2 c), and the lower connecting rods (2 d) correspond to the lower universal joints (2 b) one by one; the number of the lower universal joints (2 b) is the same as that of the lower limiting hoops (1 c);
the upper slip ring (4) consists of an upper connecting ring (4 a), a plurality of upper universal joints (4 b), an upper connecting sleeve (4 c) and a plurality of upper connecting rods (4 d); the outer diameter of the upper connecting ring (4 a) is smaller than that of the lower connecting ring (2 a); the upper universal joint (4 b) is arranged on the lower side surface of the upper connecting ring (4 a), and the axial direction of the upper universal joint (4 b) inclines upwards to the outer side of the upper connecting ring (4 a); the plurality of upper universal joints (4 b) are distributed along the circumferential direction of the upper connecting ring (4 a), the number of the upper universal joints (4 b) is the same as that of the lower universal joints (2 b), and the positions of the upper universal joints and the lower universal joints are in one-to-one correspondence; the upper connecting sleeve (4 c) is coaxially arranged in an inner hole of the upper connecting ring (4 a); one end of an upper connecting rod (4 d) is connected with the side wall of the inner side of the upper universal joint (4 b), the other end of the upper connecting rod (4 d) is connected with the outer wall of an upper connecting sleeve (4 c), and a plurality of upper connecting rods (4 d) correspond to a plurality of upper universal joints (4 b) one by one;
the lower end face of the upper support plate (5) is provided with an upper shear pin (5 a), an upper annular sliding groove (5 b) and a plurality of upper limit hoops (5 c); the outer diameter of the upper annular chute (5 b) is smaller than that of the lower annular chute (1 b); the upper annular sliding groove (5 b) is positioned at the periphery of the upper shear pin (5 a), and the upper shear pin (5 a) and the upper annular sliding groove (5 b) are coaxial; a polytetrafluoroethylene cushion layer is arranged on the surface of the upper annular chute (5 b); the upper limiting hoop (5C) is of a C-shaped structure, the opening of the upper limiting hoop (5C) faces upwards, the end surfaces of two sides of the opening of the upper limiting hoop (5C) are respectively a C end and a D end, the C end is connected with the end surface of the upper support plate (5) on the inner side of the upper annular sliding groove (5 b), the D end is connected with the end surface of the upper support plate (5) on the outer side of the upper annular sliding groove (5 b), and the C end and the D end are radially distributed along the upper annular sliding groove (5 b); a plurality of upper limiting hoops (5 c) are circumferentially distributed along the upper annular sliding groove (5 b); the number of the upper limiting hoops (5 c) is the same as that of the lower limiting hoops (1 c); the bottom surface of the upper annular sliding chute (5 b) is an arc surface;
the lower connecting ring (2 a) is sleeved in a space surrounded by the lower limiting hoop (1 c) and the lower annular sliding groove (1 b), the bottom surface of the lower connecting ring (2 a) is in contact with a polytetrafluoroethylene cushion layer in the lower annular sliding groove (1 b), a gap is reserved between the lower side surface of the lower connecting rod (2 d) and the lower support plate (1), and the lower shear pin (1 a) is sleeved in an inner hole of the lower connecting sleeve (2 c); a lower universal joint (2 b) is arranged between the adjacent lower limiting hoops (1 c);
the upper connecting ring (4 a) is sleeved in a space surrounded by the upper limiting hoop (5 c) and the upper annular sliding groove (5 b), the top surface of the upper connecting ring (4 a) is in contact with a polytetrafluoroethylene cushion layer in the upper annular sliding groove (5 b), a gap is reserved between the upper side surface of the upper connecting rod (4 d) and the upper support plate (5), and the upper shear pin (5 a) is sleeved in an inner hole of the upper connecting sleeve (4 c); an upper universal joint (4 b) is arranged between the adjacent upper limiting hoops (5 c);
the positions of the upper universal joint (4 b) and the lower universal joint (2 b) are in one-to-one correspondence; the upper universal joint (4 b) and the lower universal joint (2 b) which correspond to each other in position are connected through the damper (3); the upper connecting sleeve (4 c) is opposite to the lower connecting sleeve (2 c), the connecting cylinder (6) is arranged between the upper connecting sleeve (4 c) and the lower connecting sleeve (2 c), and two ends of the connecting cylinder (6) are respectively fixed with the upper connecting sleeve (4 c) and the lower connecting sleeve (2 c);
the structural strength of the shear pin is smaller than that of the connecting cylinder (6), and the structural strength of the connecting cylinder (6) is smaller than that of the connecting rods.
Priority Applications (1)
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