CN109577177B - Rotary adapting device and one-way support - Google Patents
Rotary adapting device and one-way support Download PDFInfo
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- CN109577177B CN109577177B CN201811107963.6A CN201811107963A CN109577177B CN 109577177 B CN109577177 B CN 109577177B CN 201811107963 A CN201811107963 A CN 201811107963A CN 109577177 B CN109577177 B CN 109577177B
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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
- E01D19/042—Mechanical bearings
- E01D19/046—Spherical bearings
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/40—Plastics
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
The invention relates to a rotary adapting device and a one-way support, wherein the rotary adapting device comprises a rotary adapting plate which is horizontally arranged; the lower end edge of the rotary adapting block is in linear contact with the upper surface of the rotary adapting plate point; wherein, the side of the rotary adapting block is provided with a concave surface which is connected with the support in a rotary way. The one-way support is realized by adopting the rotation adapting device, and the invention can realize normal vertical bearing, horizontal stress limiting or guide sliding, rotation around any horizontal direction and the like.
Description
Technical Field
The invention relates to a rotary adapting device and a one-way support, in particular to a rotary adapting device with ultrahigh horizontal force and large rotation angle and a one-way support.
Background
Along with the development of bridge construction technology, the span of a bridge is larger and larger, the load borne by the beam in the horizontal direction is also larger and larger, and for a common support, the designed horizontal load can not meet the actual horizontal load requirement. In the prior art, some supports improve the horizontal force bearing capacity by thickening the corresponding components of the upper seat plate, but the supports cannot bear large rotation angles of the supports under high horizontal force. Some scientific research institutions and scholars at home and abroad also provide different high-level force supports, but the high-level force supports have the following defects: when the support generates a corner, stress concentration can be generated in the horizontal direction, so that a local component generates plastic deformation failure under the working conditions of ultrahigh horizontal force and large corner applied to the support.
Disclosure of Invention
Aiming at the problems, the invention provides a rotary adapting device and a one-way support, which can realize normal vertical bearing, horizontal stress limiting or guide sliding, rotation around any horizontal direction and large rotation angle and the like.
In one aspect of the invention, a rotary adapter device is provided, comprising:
a horizontally arranged rotary adapter plate;
the lower end edge of the rotary adapting block is in linear contact with the upper surface of the rotary adapting plate point;
wherein, the side of the rotary adapting block is provided with a concave surface which is connected with the support in a rotary way.
The invention is further improved in that the bottom of the rotary adapter block is provided with a convex arc edge, the arc edge is in contact with the upper surface of the rotary adapter plate, and the arc edge can rotate on the rotary adapter plate within a certain angle.
The invention has the further improvement that a first wear-resistant strip is arranged between the rotary adapting block and the inner side surface of the flange; and a second wear-resistant strip is arranged between the rotary adapting block and the lower connecting body.
Another aspect of the present invention provides a unidirectional support, which is implemented by using the rotary adapting device, and includes:
the lower seat plate comprises a lower plate body and a lower connecting body arranged on the upper surface of the lower plate body;
the upper seat plate is connected to the upper end of the lower seat plate, the upper seat plate comprises an upper plate body and flanges arranged on two sides of the lower surface of the upper plate body, and the lower connecting body is arranged between the flanges; and
wherein, the flange and the lower connecting body are connected through the rotary adapting device.
The invention has the further improvement that the concave surface is arranged on the inner side surface of the rotary adapting block, and convex surfaces matched with the concave surface of the rotary adapting block are arranged on two sides of the lower connecting body;
the second wear-resistant strip is an arc-shaped wear-resistant strip arranged between the concave surface and the convex surface.
The invention is further improved in that two ends of the flange are respectively provided with a stop block, and the stop blocks are aligned with two ends of the rotary adapting block, so that the rotary adapting block is limited to move between the stop blocks.
The invention is further improved in that a middle seat plate is arranged between the lower seat plate and the upper seat plate, the upper surface of the middle seat plate is connected with the upper plate body in a sliding mode, and the lower surface of the middle seat plate is connected with the lower connecting body in a sliding mode.
The invention has the further improvement that the top of the lower connecting body is provided with a circular arc-shaped groove; the top surface of the middle seat plate is provided with a plane connected with the upper plate body in a sliding mode, and the bottom surface of the middle seat plate is provided with a cambered surface matched with the groove.
The invention is further improved in that a plane wear-resisting plate is arranged between the middle seat plate and the upper plate body, and a cambered surface wear-resisting plate is arranged between the groove of the lower connector and the cambered surface of the middle seat plate.
The invention has the further improvement that the plane wear-resisting plate and the cambered surface wear-resisting plate are made of modified ultra-high molecular weight polyethylene plates, and the first wear-resisting strip and the second wear-resisting strip are made of SF-1 materials; the rotary adapting device is made of an integrally chromium-plated material.
Compared with the prior art, the invention has the advantages that:
the rotary adapting device and the one-way support can realize the functions of normal vertical bearing, horizontal stress limiting or guide sliding, rotation around any horizontal direction and the like. Besides, due to the arrangement of the rotary adapting device, under the action of ultrahigh horizontal force, the support can realize that horizontal stress components always keep surface contact under the working conditions of independent large-angle rotation, combined same-angle rotation and combined different-angle rotation of the longitudinal bridge direction and the transverse bridge direction, and contact stress concentration and plastic deformation do not occur.
In the rotary adapting device and the one-way support, the second wear-resistant strip is arranged between the rotary adapting block and the lower connecting body, so that the friction resistance of the support in rotation (shown by an arrow in figure 1) when the support is subjected to a large horizontal force (in the left-right direction in figure 1) can be reduced, the paint coating of the convex surface of the lower seat plate can be well protected, and the lower seat plate is prevented from being easily rusted due to the damage of the paint caused by the rotary friction.
In the rotary adapting device and the one-way support, the flange of the upper seat plate is provided with SF-1 (different from the conventional method that the flange of the upper seat plate is provided with mirror surface stainless steel, and the rotary adapting block is provided with SF-1), mainly the left side, the right side and the lower side of the rotary adapting block need to be rotated or slid for friction, when the integral chromium plating or mirror surface stainless steel coating is adopted, the process is facilitated, the integral process flow is reduced, and the process cost is reduced.
In the rotary adapting device and the one-way support, the bottom of the rotary adapting block is provided with an outward convex arc edge, the arc edge is contacted with the upper surface of the rotary adapting plate, and the arc edge can rotate on the rotary adapting plate within a certain angle. Under the prerequisite that can guarantee to rotate the function, let the support when receiving big horizontal force horizontal slip (figure 1 perpendicular to paper direction, figure 2 left and right sides direction), the arc limit can be on pasting the rotation adapter plate that covers and have the third wear strip (adopt SF-1) horizontal slip, the slip of going up bedplate both sides takes place between the first wear strip plane that its edge of a wing set up and the plane of rotation adapter piece simultaneously to let the slip more smooth and easy.
Drawings
FIG. 1 is a schematic structural view of a unidirectional mount according to one embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of a rotating adapter block structure according to an embodiment of the present invention;
fig. 4 is a schematic sectional view B-B of fig. 3.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The meaning of the reference symbols in the drawings is as follows: 1. the lower seat board, 2, go up the seat board, 3, well seat board, 4, rotate adapter device, 11, lower plate body, 12, lower connector, 13, recess, 14, convex surface, 21, go up the plate body, 22, the flange, 23, dog, 31, cambered surface, 32, plane antifriction plate, 33, cambered surface antifriction plate, 34, third wear-resisting strip, 41, rotate the adapter plate, 42, rotate the adapter piece, 43, arc limit, 44, concave surface, 45, first wear-resisting strip, 46, the wear-resisting strip of second.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 schematically shows a rotating adapter block and a one-way bearing according to one embodiment of the invention. According to the rotary adapting block and the one-way support, the functions of normal vertical bearing, horizontal stress limiting or guide sliding, rotation around any horizontal direction and the like can be realized.
As shown in fig. 1, the rotary adapter 4 of the present embodiment includes a horizontally disposed rotary adapter plate 41. The rotary adapter plate 41 is a plate-like structure, and the rotary adapter plate 41 is connected to the upper half of the holder. The rotary adapter device 4 further comprises a rotary adapter block 42, and the rotary adapter block 42 is connected with the lower half part of the support. Wherein the lower end edge of the rotary adapter block 42 is in linear contact with the upper surface of the rotary adapter plate 41. In this embodiment, the side of the rotary adapter block 42 is provided with a concave surface in connection with the rotation of the support.
In the rotation adapting device according to the embodiment, due to the arrangement of the rotation adapting device 4, under the action of ultrahigh horizontal force, the support can realize that horizontal stressed components always keep surface contact under the working conditions of independent large-angle rotation, combined same-angle rotation and combined different-angle rotation of a longitudinal bridge direction and a transverse bridge direction, so that the contact stress concentration and the plastic deformation are avoided, meanwhile, the multidirectional deflection can be realized when an earthquake occurs, and the support is ensured not to be damaged and fail.
In one embodiment, the bottom of the rotary adapter block 42 is provided with a convex arc edge 43, the arc edge 43 contacts with the upper surface of the rotary adapter plate 41, and the arc edge 43 can rotate on the rotary adapter plate 41 within a certain angle, thereby achieving linear contact. The rotary adapter block 42 of the present embodiment is in linear contact with the rotary adapter plate 41 through the arc edge 43, and when the longitudinal rotation occurs, the rotary adapter block 42 rotates on the rotary adapter plate 41 to match the arc surface 31 of the middle seat plate 3 to rotate in the groove 13.
In the rotary adapter device according to the present embodiment, the bottom of the rotary adapter block is provided with a convex arc edge, the arc edge contacts with the upper surface of the rotary adapter plate, and the arc edge can rotate on the rotary adapter plate within a certain angle. On the premise of ensuring the rotation function, when the support horizontally slides under a large horizontal force (the direction perpendicular to the paper in fig. 1, and the left and right directions in fig. 2), the arc edge can horizontally slide on the rotating adapter plate covered with the third wear-resistant strip 34, and the third wear-resistant strip 34 is preferably SF-1. Meanwhile, the sliding of the two sides of the upper seat plate occurs between the SF-1 plane arranged on the flange of the upper seat plate and the plane of the rotary adapting block, so that the sliding is smoother.
In a preferred embodiment, one side of the rotating adapter block 42 is connected to the upper half of the holder by a first wear strip 45. The other side of the rotary adapter block 42 is connected to the lower half of the support by a second wear strip 46.
According to another aspect of the invention, a one-way support is also disclosed, which is realized by adopting the rotary adapting device 4 of the above embodiment. The one-way support comprises a lower seat plate 1. The lower seat plate 1 includes a lower plate body 11 and a lower connecting body 12 disposed on the lower plate body 11. In the present embodiment, the lower plate 11 and the lower connecting body 12 form a structure with a convex cross section. Wherein, the lower plate body 11 may be rectangular, circular or other shapes; the lower connector 12 is preferably rectangular parallelepiped in shape. The unidirectional bearing of the present embodiment further includes an upper seat plate 2, the upper seat plate 2 is disposed on the lower seat plate 1, the upper seat plate 2 includes an upper plate 21 and flanges 22 disposed at both sides of the lower surface of the upper plate 21, and the lower connecting body 12 is disposed between the two flanges 22. The unidirectional support of this embodiment further comprises the rotary adapter 4 of the previous embodiment, and the rotary adapter 4 is disposed between the flange 22 and the lower connecting body 12.
In this embodiment, the rotation adapter plate 41 is disposed at the bottom of the flange 22 and extends to the inner side of the flange 22 for a distance for supporting the rotation adapter block. The rotary adapter block 42 is disposed inside the flange 22 and its lower end contacts the rotary adapter plate 41. Wherein the first wear-resistant strip 45 is arranged between the rotary adapter block 42 and the inner side surface of the flange 22; the second wear-resistant strip 46 is disposed between the rotary adapter block 42 and the lower connecting body 12. Preferably, the first wear strip 45 is in the shape of a stapler needle and is fixed to the flange 22 of the upper seat plate 2, and the second wear strip 46 is fixed to the lower connecting body 12 of the lower seat plate 1.
In the unidirectional support according to the embodiment, a middle seat plate 3 is arranged between the lower seat plate 1 and the upper seat plate 2, and the middle seat plate 3 and the upper seat plate 2 and the lower seat plate 1 can slide relatively. The rotary adapter can balance the stress during rotation. Under the working conditions of ultrahigh horizontal force, independent large-angle rotation of the longitudinal bridge direction and the transverse bridge direction, combined same-angle rotation and combined different-angle rotation, the horizontal stress member always keeps surface contact, contact stress concentration and plastic deformation do not occur, meanwhile, multidirectional deflection can be realized when an earthquake occurs, and the support is prevented from being damaged and losing efficacy.
In a preferred embodiment, as shown in fig. 3 and 4, the inner side of the rotary adapter block 42 is provided with an arc-shaped concave surface 44, and both sides of the lower connecting body 12 are provided with convex surfaces 14 matched with the concave surface 44 of the rotary adapter block 42. The concave surface 44 is a cylindrical concave surface 44, that is, the concave surface 44 is provided with an elongated groove surface with an arc-shaped cross section. Wherein the second wear strip 46 is an arc-shaped wear strip disposed between the concave surface 44 and the convex surface 14.
When the unidirectional support according to the embodiment is used, if the unidirectional support is subjected to an ultrahigh horizontal force and rotates along the transverse direction, the middle seat plate 3 and the rotating wear-resisting plate rotate at a large rotation angle, and the rotating adapter plate 41 and the rotating adapter block 42 rotate synchronously relative to each other. The first wear-resistant strip 45 fixed on the flange 22 between the upper seat plate 2 and the planar wear-resistant plate 32 and the rotary adapting device 4 simultaneously generate planar sliding to adapt to two rotary positions. The device can realize stable rotation when rotating at a large rotation angle and has the characteristic of large rotation angle. And when the horizontal stressed component rotates at a large angle, the horizontal stressed component still keeps surface-to-surface contact, and stress concentration and plastic deformation cannot occur under the condition of bearing ultrahigh horizontal force.
In one embodiment, the flanges 22 are provided with stops 23 at each end, and the stops 23 are aligned with the ends of the convex surface 14 such that the rotating adapter block 42 is constrained to move between the stops 23. In this embodiment, the number of the stoppers 23 is preferably four, and the stoppers are respectively disposed at both ends of the two flanges 22. In the embodiment, the stop 23 is arranged to limit the movement of the rotary adapter block 42, so that the rotary adapter block 42 is prevented from sliding out.
In one embodiment, the one-way bearing further comprises a middle seat plate 3, and the middle seat plate 3 is arranged between the lower seat plate 1 and the upper seat plate 2. The upper surface of the middle seat plate 3 is connected with the upper plate body 21 in a sliding manner, and the lower surface of the middle seat plate 3 is connected with the upper surface of the lower connecting body 12 in a sliding manner.
In the one-way bearing according to the present embodiment, the middle seat plate 3 is provided in the shape of a segment of a sphere and is fitted with the groove 13. The cambered surface 31 can rotate in all directions in the groove 13, so that the surface contact is kept between the middle seat plate 3 and the upper seat plate 2 and between the middle seat plate and the lower seat plate 1 when the middle seat plate rotates at different angles, and the contact stress concentration and the plastic deformation are avoided.
In one embodiment, the upper surface of the top of the lower connecting body is provided with a circular arc-shaped groove 13. In this embodiment, the middle seat plate 3 has a segment shape, i.e. the upper surface is a plane, and the lower surface is a convex arc surface 31. The upper plane of the middle seat plate 3 is connected with the upper plate body 21 in a sliding manner, and the arc surface 31 of the bottom surface of the middle seat plate 3 is matched with the shape and radian of the groove 13. The arc surface 31 is disposed in the groove 13 and can rotate in the groove 13.
In a preferred embodiment, a planar wear plate 32 is disposed between the middle seat plate 3 and the upper plate body 21. Well bedplate 3 forms the sliding pair through plane antifriction plate 32 and upper bedplate 2 and realizes horizontal slip, and the inboard and the 4 outsides of rotation adapter device of two edges of a wing 22 of upper bedplate 2 form the direction glide plane simultaneously, make frictional force reach theoretical minimum under two glide planes simultaneous action to horizontal slip is more smooth and easy.
In this embodiment, an arc wear plate 33 is disposed between the groove 13 of the lower connector and the arc surface 31 of the middle seat plate 3. Well bedplate 3 forms the revolute pair through cambered surface wear-resisting plate 33 and lower connector 12's recess 13 and realizes all-round rotation, simultaneously, the both sides of lower connector 12 through second wear-resisting strip 46 with the concave surface 44 of rotating adaptation piece 42 forms horizontal direction pair and realizes horizontal adaptation rotation, rotate adaptation piece 42 through arc limit 43 realize with it realizes vertical adaptation rotation to rotate adaptation board linear contact formation vertical direction pair of leading realization. When the large-angle rotation occurs, the transverse guide pair and the longitudinal guide pair can be automatically matched with the rotating pair continuously, so that the stable rotation can be realized, and the large-angle rotation device has the characteristic of large rotation angle.
In the use of the unidirectional bearing according to the present embodiment, if the middle seat plate 3 and the rotatable wear plate rotate relatively at a large angle when subjected to a horizontal force of an ultra-high horizontal force, such as 120% of a vertical force, in the longitudinal direction, the rotatable adapter 4 rotates relatively synchronously with respect to the second wear strip 46. The upper seat plate 2 and the plane wear-resistant plate 32, and the second wear-resistant strip 46 and the rotation adapting device 4 simultaneously generate plane sliding to adapt to the misalignment of the two rotation centers, so that the effects of stable rotation and large rotation angle of the support are achieved. The synchronous corner adaptation principle is that the inner side surface of the rotation adaptation device 4 adopts a concave cylindrical surface design, the lower seat plate 1 matched with the concave cylindrical surface design adopts a convex cylindrical surface design, and the characteristics of stable rotation and large rotation angle can be realized when the revolute pair formed by the spherical structure is matched with the middle seat plate 3 and the rotary wear-resisting plate to rotate at a large corner. Meanwhile, the outer side surface of the rotary adapting device 4 is in surface-to-surface contact with the horizontal stress part of the flange 22 of the upper seat plate 2, and the surface-to-surface contact is still kept when the rotary adapting device rotates at a large angle, so that stress concentration and plastic deformation cannot occur under the condition of bearing ultrahigh horizontal force.
In one embodiment, the planar wear plate 32 and the cambered surface wear plate 33 are made of modified ultra-high molecular weight polyethylene plates, and the first wear strip 45 and the second wear strip 46 are made of SF-1, wherein the SF-1 is three-layer combined wear-resistant material without oil lubrication. The rotary adapting device 4 is made of an integrally chromium-plated material, so that the service life of the whole device is prolonged.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. A one-way bearing, comprising:
the lower seat plate (1), the lower seat plate (1) comprises a lower plate body (11) and a lower connecting body (12) arranged on the upper surface of the lower plate body (11);
the upper seat plate (2) is connected to the upper end of the lower seat plate (1), the upper seat plate (2) comprises an upper plate body (21) and flanges (22) arranged on two sides of the lower surface of the upper plate body (21), and the lower connecting body (12) is arranged between the flanges (22); and
wherein the flange (22) and the lower connecting body (12) are connected by a rotary adapter device (4); the rotary adapting device comprises a rotary adapting plate (41) which is horizontally arranged and a rotary adapting block (42) which is vertically arranged on the rotary adapting plate (41), wherein the lower end edge of the rotary adapting block (42) is in linear contact with the upper surface of the point of the rotary adapting plate (41); the side surface of the rotary adapting block (42) is provided with a concave surface (44) which is rotationally connected with the support;
the bottom of the rotary adapter block (42) is provided with a convex arc edge (43), the arc edge (43) is contacted with the upper surface of the rotary adapter plate (41), and the arc edge (43) can rotate on the rotary adapter plate (41) within a certain angle;
one side of the rotary adapting block (42) is connected with the upper half part of the support through a first wear-resistant strip (45); the other side of the rotary adapting block (42) is connected with the lower half part of the support through a second wear-resistant strip (46);
the concave surface (44) is arranged on the inner side surface of the rotary adapting block (42), and convex surfaces (14) matched with the concave surface (44) of the rotary adapting block (42) are arranged on two sides of the lower connecting body (12);
wherein the second wear strip (46) is an arcuate wear strip disposed between the concave surface (44) and the convex surface (14).
2. The unidirectional support according to claim 1, characterized in that the flanges (22) are provided at both ends with respective stops (23), said stops (23) being aligned with both ends of said rotary adapter block (42) so that said rotary adapter block (42) is constrained to move between said stops (23).
3. A unidirectional bearing according to claim 1 or 2, characterized in that a middle seat plate (3) is arranged between said lower seat plate (1) and said upper seat plate (2), the upper face of said middle seat plate (3) is slidingly connected with said upper plate (21), and the lower face of said middle seat plate (3) is slidingly connected with said lower connecting body (12).
4. A unidirectional support according to claim 3, characterized in that the top of said lower connector is provided with a recess (13) in the shape of a circular arc; the top surface of the middle seat plate (3) is provided with a plane connected with the upper plate body (21) in a sliding manner, and the bottom surface of the middle seat plate (3) is provided with a cambered surface (31) matched with the groove (13).
5. A unidirectional bearing according to claim 4, characterized in that a planar wear plate (32) is arranged between the middle seat plate (3) and the upper plate body (21), and an arc wear plate (33) is arranged between the recess (13) of the lower connector and the arc surface (31) of the middle seat plate (3).
6. The unidirectional support according to claim 5, wherein the planar wear-resistant plate (32) and the cambered surface wear-resistant plate (33) are made of modified ultra-high molecular weight polyethylene plates, and the first wear-resistant strips (45) and the second wear-resistant strips (46) are made of SF-1 material; the rotary adapting device (4) is made of an integrally chromium-plated material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107963.6A CN109577177B (en) | 2018-09-21 | 2018-09-21 | Rotary adapting device and one-way support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107963.6A CN109577177B (en) | 2018-09-21 | 2018-09-21 | Rotary adapting device and one-way support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109577177A CN109577177A (en) | 2019-04-05 |
| CN109577177B true CN109577177B (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811107963.6A Active CN109577177B (en) | 2018-09-21 | 2018-09-21 | Rotary adapting device and one-way support |
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| CN (1) | CN109577177B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258319B (en) * | 2019-07-26 | 2021-04-16 | 株洲时代新材料科技股份有限公司 | Self-adaptive horizontal corner shear tenon |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1909654U (en) * | 1964-11-17 | 1965-02-11 | Esslingen Maschf | BRIDGE BEARING. |
| CN2554224Y (en) * | 2002-06-27 | 2003-06-04 | 中国路桥(集团)新津筑路机械厂 | Lateral rocker type tensil, shear ball bridge bearing |
| CN201485786U (en) * | 2009-08-18 | 2010-05-26 | 衡水宝力工程橡胶有限公司 | Rotating sleeve type spherical steel support for railway bridge |
| CN203530836U (en) * | 2013-09-18 | 2014-04-09 | 中铁二院武汉勘察设计研究院有限责任公司 | Height-adjustable spherical support with guide mechanism |
| CN107700341A (en) * | 2017-10-12 | 2018-02-16 | 中铁第四勘察设计院集团有限公司 | A kind of bridge pad with antidumping function |
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2018
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