CN111663436A - Cylindrical surface support - Google Patents
Cylindrical surface support Download PDFInfo
- Publication number
- CN111663436A CN111663436A CN202010645192.7A CN202010645192A CN111663436A CN 111663436 A CN111663436 A CN 111663436A CN 202010645192 A CN202010645192 A CN 202010645192A CN 111663436 A CN111663436 A CN 111663436A
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- Prior art keywords
- cylindrical
- plate
- steel plate
- rolling
- support plate
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Classifications
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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
Abstract
The invention discloses a cylindrical surface support, which comprises: an upper support plate; the lower support plate is positioned below the upper support plate; the sliding assembly comprises a cylindrical steel plate horizontally arranged on the side of the upper support plate and a cylindrical bulge matched with the lower surface of the cylindrical steel plate and horizontally arranged or formed on the upper surface of the lower support plate, and the axes of the cylindrical steel plate and the cylindrical bulge are parallel or collinear and are arranged in the transverse bridge direction; the cylindrical protrusion is provided with a plurality of rolling ways around the surface thereof, the rolling ways are distributed in the axial direction of the cylindrical protrusion, and the rolling balls distributed in the rolling ways are used for forming rolling friction fit in the matching manner. The cylindrical surface support based on the invention has relatively long service life.
Description
Technical Field
The invention relates to a cylindrical surface support.
Background
Early bridge beam supports are plate rubber supports, and with the development of bridge beam support technology, basin-type rubber supports and spherical supports gradually appear, wherein the spherical supports are bridge supports developed on the basis of the basin-type rubber supports and are bridge supports which are most widely applied at present.
The spherical bearing is used for realizing load transfer between a beam body and a bridge pier of the bridge and balancing linear displacement and angular displacement of the beam body relative to the bridge pier. The linear displacement of the spherical support is realized by the relative sliding of the plane stainless steel plate positioned at the upper part of the spherical support and the plane polytetrafluoroethylene sliding plate, and the angular displacement is realized by the relative sliding of the curved surface stainless steel plate positioned at the lower part of the spherical support and the spherical polytetrafluoroethylene sliding plate. The ball bearing provides a rotational capability equivalent to a ball hinge, with three rotational degrees of freedom, and a compound rotational capability. In some implementations, however, only one rotational degree of freedom needs to be preserved, for which purpose cylindrical surface mounts have been developed.
Common cylinder face support is in the application, when need set up a plurality of cylinder face supports simultaneously on a bridge, because of the unable assurance of the axiality between the cylinder face of a plurality of bridge bearings under the user state, lead to cylinder polytetrafluoroethylene board eccentric wear serious, the condition of early excessive wear easily appears, even very cylinder polytetrafluoroethylene board is extruded from the bottom suspension seat board, has seriously influenced cylinder face support's due performance.
Earlier, as in chinese patent document CN2304687Y, the disclosed cylindrical support is a basic cylindrical support, and specifically, a sliding block is disposed between an upper pendulum (i.e., an upper support plate) and a bottom plate (i.e., a lower support plate), and the upper pendulum and the sliding block are contacted through a cylindrical surface, so that only one rotational degree of freedom, i.e., a rotational degree of freedom rotating around the cylindrical axis, is retained in this kind of bridge support. However, a bridge often needs to be provided with a plurality of bridge supports, and obviously, the response to the rotation of the bridge is reflected on different cylindrical surface supports and is often consistent, or, better coaxiality among the configured cylindrical surfaces is often required to be ensured between two or more cylindrical surface supports along the bridge direction.
Disclosure of Invention
The invention aims to provide a cylindrical surface support with relatively long service life.
In an embodiment of the present invention, there is provided a cylindrical surface mount including:
an upper support plate;
the lower support plate is positioned below the upper support plate;
the sliding assembly comprises a cylindrical steel plate horizontally arranged on the side of the upper support plate and a cylindrical bulge matched with the lower surface of the cylindrical steel plate and horizontally arranged or formed on the upper surface of the lower support plate, and the axes of the cylindrical steel plate and the cylindrical bulge are parallel or collinear and are arranged in the transverse bridge direction;
the cylindrical protrusion is provided with a plurality of rolling ways around the surface thereof, the rolling ways are distributed in the axial direction of the cylindrical protrusion, and the rolling balls distributed in the rolling ways are used for forming rolling friction fit in the matching manner.
Optionally, the ball is positioned in the raceway by a cage; or
The adjacent rolling balls are separated through a spacing ball, and the diameter of the spacing ball is 0.15-0.30 mm smaller than that of the rolling ball.
Optionally, the number of the raceways is 3-7.
Optionally, the length of the raceway is less than the inner arc length of the cylindrical steel plate.
Optionally, notches are formed on the lower support plate at two axial sides of the cylindrical protrusion;
the two circumferential ends of the cylindrical steel plate are correspondingly led into the groove openings.
Optionally, outside the notch, the lower seat plate extends upward to form an arc-shaped guide portion, and the arc-shaped guide portion forms a sliding fit with the outer surface of the cylindrical steel plate.
Optionally, the sliding assembly further comprises:
the upper surface of the lining plate is a plane, and the lower surface of the lining plate is fixedly connected with the outer surface of the cylindrical steel plate;
the sliding plate group is arranged between the upper surface of the lining plate and the upper support plate and used for providing linear displacement.
The cylinder mount of claim 7 wherein said set of slides comprises:
a planar stainless steel plate fixed on the lower surface of the upper support plate;
and the plane polytetrafluoroethylene plate is fixed on the upper surface of the lining plate.
Optionally, the fixed connection between the liner plate and the cylindrical steel plate is welding.
Optionally, the ball has a diameter of 1.5mm, 2mm, 2.5mm or 3 mm.
In the embodiment of the invention, the cylindrical surface pair of the cylindrical surface support is a rolling friction pair, and the sliding friction can be changed into rolling friction on one hand, so that the friction coefficient is smaller, the abrasion can be reduced, and the service life of the whole body is prolonged. On the other hand, rolling friction necessarily has a clearance, and in the case that only one degree of freedom of rotation remains, the clearance provided by rolling can balance the loads in other rotational directions in minute quantities, thereby reducing the influence of these loads on the service life thereof.
Drawings
FIG. 1 is a schematic cross-sectional view of a cylindrical support in a half-bridge configuration according to an embodiment.
FIG. 2 is a schematic diagram of a cross-sectional structure of the cylindrical support along the bridge direction in one embodiment.
FIG. 3 is a top view of an embodiment of a lower support plate.
1. The bearing comprises an upper support plate, 2 planar stainless steel plates, 3 planar polytetrafluoroethylene plates, 4 lining plates, 5 cylindrical steel plates, 6 spacing bodies, 7 rolling balls, 8 lower support plates, 9 raceways and 10 plate grooves.
Detailed Description
It can be understood that most current bridge supports have linear displacement and angular displacement capabilities, and relatively few bridge supports have single capability.
Generally, the upper support plate 1 is anchored to a beam body of a bridge by an upper support plate anchor bolt, for example, and the lower support plate 8 is anchored to a pier stud of the bridge by a lower support plate anchor bolt, the former is static with respect to the beam body, the latter is static with respect to the pier stud, if the beam body is static with respect to the pier stud, the beam body can transmit an additional load generated by expansion and contraction with heat and cold, vibration, and load change to the pier stud in addition to a gravity load, and an accident is very likely to occur in a static state.
Therefore, the bridge support is provided to relieve the influence of static-induced additional load on the connection reliability between the beam body and the pier stud.
It should be noted that for an arcuate plate, for example, the centrifugal side is generally referred to as the outboard side and the centripetal side is generally referred to as the inboard side, which has axial ends and circumferential ends.
It should be understood that for left and right configurations, the left and right apposition is inward, and vice versa.
It should be noted that the bridge supports have a defined up-down orientation.
In addition, the bridge support is restricted by existing reference systems such as a forward bridge direction, a transverse bridge direction and the like.
Fig. 1 is a schematic cross-bridge half-sectional view of a cylindrical surface support in an embodiment, or the axis of a cylindrical surface steel plate 5 is in a cross-bridge direction; fig. 2 is a schematic diagram of a half-section structure of the cylindrical surface support along the bridge direction. As can be seen in fig. 1 and 2, the core structure of the cylinder mount has an upper mount plate 1 and a lower mount plate 8, and a slide assembly to provide linear and angular displacement of the upper mount plate 1 relative to the lower mount plate 8. The sliding assembly is interposed between the upper support plate 1 and the lower support plate 8, or the upper support plate 1 is supported on the lower support plate 8 by the sliding assembly.
Accordingly, the lower seat plate 8 is located below the upper seat plate 1 at a distance that is dependent upon the support height of the slide assembly, which is ideally as small as possible to maintain overall stability while achieving the desired linear and angular displacement.
Specifically, the sliding assembly necessarily comprises a cylindrical steel plate 5 horizontally arranged on the side of the upper support plate, the cylindrical steel plate 5 is positioned on the side of the upper support plate 1 of the cylindrical support, and in some embodiments, the cylindrical steel plate 5 and the upper support plate 1 can be fixedly connected, for example, welded, and in other embodiments, a sliding plate group with linear displacement capability can be arranged between the cylindrical steel plate 5 and the upper support plate 1.
From the foregoing, it is not necessary that the bridge support has both linear and angular displacement capabilities, and it is necessary that the bridge support has one-directional angular displacement capability or one rotational degree of freedom.
Further, in the case where the cylindrical steel plate 5 is disposed on the side of the upper seat plate 1, it is necessary to dispose a columnar projection which is fitted to the lower surface of the cylindrical steel plate and horizontally disposed or formed on the upper surface of the lower seat plate on the side of the lower seat plate 8.
Suitably, the axis of the cylindrical steel plate 5 and the axis of the cylindrical protrusion are parallel or collinear with each other, ideally the axis of the cylindrical steel plate 5 and the axis of the cylindrical protrusion are collinear, but due to the presence of the fitting clearance, such collinear axes are herein indicated as being parallel to each other.
Further, the cylindrical steel plates 5 and the cylindrical protrusions are arranged in the transverse bridge direction correspondingly.
Wherein, the cylindrical bulge is provided with a plurality of roller paths 9 around the surface of the cylindrical bulge, and the roller paths 9 are distributed in the axial direction of the cylindrical bulge and are uniformly distributed or are sparse in the middle and gradually arranged in a mode of becoming dense towards two sides.
Accordingly, the fit is a rolling friction fit by means of the balls 7 arranged within the raceway 9.
As is known to those having slight mechanical knowledge, a bearing generally has an outer ring having a certain amount of axial play and two slight degrees of rotation in addition to a rotational degree of freedom with respect to an inner ring due to the presence of rolling elements. In embodiments of the invention, the cylindrical surface support is provided with the ability to effectively compensate for slight displacement in other directions by means of rolling friction fit, rather than rigid loading between the members forming the friction pair, thereby providing a longer service life.
To maintain load uniformity, in some embodiments, the balls 7 are positioned in the raceway 9 by a cage. The cage essentially maintains a reasonable spacing between the balls 7 so that the load applied by the carried components to the support body is relatively uniform.
In other embodiments, adjacent rolling balls 7 are separated by a spacing ball 6, and the diameter of the spacing ball 6 is 0.15-0.30 mm smaller than that of the rolling balls 7. The ball 7 used to provide the rolling can be made with reference to the precision of the ball 7 for which the bearing is adapted, such balls 7 typically being of the order of IT7 or IT 6. While the design dimensions of the spacer ball 6 are somewhat smaller relative to the ball 7, on the one hand to provide spacing and on the other hand to provide no support. Meanwhile, the diameters of the spacing ball 6 and the rolling ball 7 are not different, so that the rolling ball 7 does not climb to the spacing ball 6 to cause clamping stagnation.
In the structure shown in fig. 3, the number of the raceways 9 is 6, which is effective for distributing the load, and generally, the number of the raceways 9 is not too large, which may reduce the reliability, and generally, the number of the raceways is controlled below 7, and at most, the number of the raceways is not more than 9.
The number of the roller paths 8 is not limited too little, and is generally controlled to be 3 or more than 3, otherwise, the local load is excessive.
In the configuration shown in fig. 1, the length of the raceway 9 is smaller than the inner arc length of the cylindrical steel plate 5, and as a whole, the cylindrical steel plate 5 can cover the raceway 9, and in general, for bridge bearings, the allowance requirement of the rotational freedom is not high, and is generally within a few degrees, for example, less than or equal to 7 degrees, and the arrangement of the raceway 9 which is too long is not significant.
In the structure shown in fig. 1, notches are formed on the lower support plates 8 at two axial sides of the cylindrical protrusion to form plate grooves 10 as shown in fig. 3, and accordingly, two circumferential ends of the cylindrical steel plate 5 are correspondingly guided into the plate grooves 10 to form external guide, so that the sliding stability of the cylindrical steel plate 5 can be ensured.
As can be seen from fig. 1 and 3, the lower support plate 8 extends upward outside the plate groove 10 to form an arc-shaped guide portion, which forms a sliding fit with the outer surface of the cylindrical steel plate 8, further increasing the guide length of the cylindrical steel plate 8, thereby forming a more stable guide structure.
As previously mentioned, the angular displacement capability is typically one of the inherent arrangements of a cylindrical support, in most applications the linear displacement is also provided by a cylindrical support, and in the arrangement shown in figure 1 the slide assembly further comprises a portion providing the linear displacement, the portion comprising the backing plate 4 and the set of slides between the backing plate 4 and the upper support plate 1.
In the liner 4, in the structure shown in fig. 1, the upper surface of the liner 4 is a flat surface, and the lower surface is fixedly connected to the outer surface of the cylindrical steel plate 5. Because cylinder steel sheet 5 is the arc, or partial cylindrical panel, in order to ensure to have comparatively reliable joint strength, the lower surface of welt 4 is opened has the cylinder chamber, borrows by this cylinder chamber in order to improve the faying surface area between welt 4 and the cylinder steel sheet 5.
The cylindrical steel plate 5 and the lining plate 4 can adopt a welding structure.
In some embodiments, the inner surface of the cylindrical steel plate 5 has large free positions due to the presence of the raceway 9 to which the ball 7 is fitted, and screw holes may be provided at these free positions, using screws to fix the cylindrical steel plate 5 to the backing plate 4.
The sliding plate group can adopt a sliding plate group which is matched with a known bridge bearing and can provide linear displacement, and in some embodiments, the sliding plate group is formed by jointing a plane stainless steel plate 2 and a plane polytetrafluoroethylene plate 3 shown in fig. 1, wherein the plane stainless steel plate 2 is fixed on the lower surface of the upper support plate 1 in a preferred welding mode.
The plane polytetrafluoroethylene plate 3 is fixed on the upper surface of the lining plate 4, the fixing mode generally adopts a jogging mode, and belongs to one type of locking. In some embodiments, a rectangular groove may be formed in the upper surface of the backing plate 4 into which the flat ptfe sheet 3 fits just partially.
In addition, both the flat stainless steel plate 2 and the flat polytetrafluoroethylene plate 3 can be fixed on the corresponding base bodies by adopting a bonding mode, wherein the bonding mode is a more common fixing mode at present, particularly after the metal glue appears.
Further, the specification of the ball 7 is selected such that the diameter of the ball 7 is 1.5mm, 2mm, 2.5mm or 3 mm.
The distance between adjacent raceways 9 is adapted to be positively correlated with the diameter of the ball 7, in particular 10mm, 20mm, 30mm, 40 mm.
Claims (10)
1. A cylindrical support, comprising:
an upper support plate;
the lower support plate is positioned below the upper support plate;
the sliding assembly comprises a cylindrical steel plate horizontally arranged on the side of the upper support plate and a cylindrical bulge matched with the lower surface of the cylindrical steel plate and horizontally arranged or formed on the upper surface of the lower support plate, and the axes of the cylindrical steel plate and the cylindrical bulge are parallel or collinear and are arranged in the transverse bridge direction;
the cylindrical protrusion is provided with a plurality of rolling ways around the surface thereof, the rolling ways are distributed in the axial direction of the cylindrical protrusion, and the rolling balls distributed in the rolling ways are used for forming rolling friction fit in the matching manner.
2. The cylindrical surface mount of claim 1 wherein the ball is positioned in the raceway by a cage; or
The adjacent rolling balls are separated through a spacing ball, and the diameter of the spacing ball is 0.15-0.30 mm smaller than that of the rolling ball.
3. The cylindrical surface support according to claim 1 or 2, wherein the number of the rolling paths is 3 to 7.
4. A cylindrical support according to claim 1 or claim 2, in which the length of the raceway is less than the inner arc length of the cylindrical steel plate.
5. The cylinder face support according to claim 4, wherein the lower support plate on both sides of the cylindrical projection in the axial direction is provided with a notch;
the two circumferential ends of the cylindrical steel plate are correspondingly led into the groove openings.
6. A cylindrical surface mount according to claim 5 wherein the lower mount plate extends upwardly outside the rebate to form an arcuate guide which is a sliding fit with the outer surface of the cylindrical steel plate.
7. The cylinder mount of claim 1 wherein said slip assembly further comprises:
the upper surface of the lining plate is a plane, and the lower surface of the lining plate is fixedly connected with the outer surface of the cylindrical steel plate;
the sliding plate group is arranged between the upper surface of the lining plate and the upper support plate and used for providing linear displacement.
8. The cylinder mount of claim 7 wherein said set of slides comprises:
a planar stainless steel plate fixed on the lower surface of the upper support plate;
and the plane polytetrafluoroethylene plate is fixed on the upper surface of the lining plate.
9. The cylindrical surface support according to claim 7 or 8, wherein the fixed connection between the backing plate and the cylindrical steel plate is a weld.
10. The cylinder mount of claim 1 wherein the ball has a diameter of 1.5mm, 2mm, 2.5mm or 3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010645192.7A CN111663436B (en) | 2020-07-07 | 2020-07-07 | Cylindrical surface support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010645192.7A CN111663436B (en) | 2020-07-07 | 2020-07-07 | Cylindrical surface support |
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| Publication Number | Publication Date |
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| CN111663436A true CN111663436A (en) | 2020-09-15 |
| CN111663436B CN111663436B (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010645192.7A Active CN111663436B (en) | 2020-07-07 | 2020-07-07 | Cylindrical surface support |
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| Country | Link |
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| CN (1) | CN111663436B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962437A (en) * | 2021-02-05 | 2021-06-15 | 付业喜 | Bridge bearing |
| CN112962438A (en) * | 2021-02-05 | 2021-06-15 | 付业喜 | Movable bridge support |
| CN112962439A (en) * | 2021-02-05 | 2021-06-15 | 付业喜 | Plane bridge beam supports |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962437A (en) * | 2021-02-05 | 2021-06-15 | 付业喜 | Bridge bearing |
| CN112962438A (en) * | 2021-02-05 | 2021-06-15 | 付业喜 | Movable bridge support |
| CN112962439A (en) * | 2021-02-05 | 2021-06-15 | 付业喜 | Plane bridge beam supports |
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| Publication number | Publication date |
|---|---|
| CN111663436B (en) | 2021-12-28 |
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