CN217460247U

CN217460247U - Bidirectional telescopic device at beam end

Info

Publication number: CN217460247U
Application number: CN202122047332.3U
Authority: CN
Inventors: 史龙波; 刘强; 陈飞; 职涛; 闫宇青
Original assignee: China Railway Baoji Bridge Group Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd
Priority date: 2021-08-28
Filing date: 2021-08-28
Publication date: 2022-09-20
Anticipated expiration: 2031-08-28

Abstract

The utility model relates to a two-way telescoping device of beam-ends is being equipped with scissors link mechanism respectively at fixed cab apron both sides and the fixed driven steel sleeper and the initiative steel sleeper of cab apron both sides of crossing, and this scissors link mechanism is together adapted to the bridge that beam gap width variation is 800mm with fixed cab apron, driven steel sleeper and initiative steel sleeper. The advantages are that: firstly, the scissors link mechanism is originally connected with the fixed transition plate by adopting a bidirectional hinge support, so that the scissors link mechanism can adapt to the horizontal and vertical corners of an oversized beam end at a beam seam, and the whole mechanism is flexible to rotate and is not easy to block; the driven steel sleeper is connected with the connecting rod mounting base through a bolt and freely moves along with the extension of the connecting rod, so that the connecting rod foundation can be prevented from upwarping, and the extension stability of the whole mechanism is ensured; thirdly, the friction surface of the connecting rod and the connecting rod is provided with an antifriction washer, so that the rotating friction force of the connecting rod joint can be reduced to the greatest extent; fourthly, connecting holes of the connecting rod joint and connecting holes of the base B are provided with high-strength shaft sleeves, so that the shearing stress from the bolt or the base pin shaft can be resisted to the greatest extent.

Description

Bidirectional telescopic device at beam end

Technical Field

The utility model relates to a when great level, vertical corner take place for the beam joint, when its beam-ends took place the corner more than 10 thousandths, whole scissors fork mechanism can not take place to warp the card and hinder to can stretch out and draw back along with the rail expansion bend together, satisfy the needs that beam-ends level and vertical direction corner warp simultaneously, and rotate nimble, frictional force is little, ensures the two-way telescoping device of beam-ends of train driving safety.

Background

CN208250913U, name "pillow device is lifted with scissors fork to beam-ends", including last scissor arm subassembly and lower scissor arm subassembly, go up scissor arm subassembly with lower scissor arm subassembly articulates and forms a plurality of hinge point units, its characterized in that, every the hinge point unit all includes: the pin shaft is in a step shape and comprises a clamping section, a connecting section and a thread section which are arranged from bottom to top along the vertical direction, the upper scissor arm assembly and the lower scissor arm assembly are sleeved on the connecting section, and the upper scissor arm assembly can rotate relative to the lower scissor arm assembly; the connecting section is sleeved on the upper surface of the upper scissor arm assembly, the upper surface of the connecting section is clamped with the clamping step, and the upper surface of the connecting section is positioned on the upper side of the upper scissor arm assembly; and the fastening assembly is matched with the threaded section, the lower surface of the fastening assembly is abutted against the upper surface of the pin shaft adjusting washer, and a gap is formed between the lower surface of the fastening assembly and the upper surface of the upper scissor arm assembly. The method has the following defects: firstly, this patent is applicable to one-way flexible beam-ends telescoping device, and the roof beam seam is located between fixed bearing 1 and the 3 bases of movable support. When the width of the beam seam changes, the movable support 2 and the movable support 3 are driven to move, and the whole scissors fork is driven to stretch; secondly, the scissors fork can only be suitable for bridges with small expansion amount of the width of the beam gap, and the expansion amount is generally not more than +/-400 mm; thirdly, the scissors fork can only be suitable for the bridge to stretch out and draw back towards a single direction, when a larger corner (more than 10 per thousand) occurs at the beam end, the whole scissors fork mechanism can deform and block, so that the smoothness of the top surface of a steel rail is poor, and the driving safety of a train is endangered; thirdly, the long connecting rod and the short connecting rod are directly connected, or a flat washer is added in the middle, so that the friction force is large during rotation, and jamming is easy to occur; fourthly, each revolute pair is directly connected with the pin shaft, and a shaft sleeve is not arranged, so that the overall strength is low; fifthly, the scissors linkage mechanism can only be applied to the expansion of a bridge beam seam in a single direction, when the corners of the two ends of the beam seam are overlarge beam end corners, the long connecting rod and the short connecting rod are easy to be greatly distorted, and the whole scissors linkage mechanism is easy to be blocked.

CN111155425A entitled "a large-span railway steel bridge end telescoping device", the telescoping device includes a guide chute, a middle transition plate and a side transition plate; the guide sliding groove is matched and arranged at the upper part of the track bed of the railway steel bridge; the middle transition plate is fixedly arranged at the upper part of the guide chute in a matching way, and the two opposite sides in the width direction are provided with the side transition plates in a matching way; the upper parts of the track beds positioned at the outer sides of the two ends of the middle transition plate and the side transition plates in the length direction are respectively provided with a movable steel sleeper, a fixed steel sleeper and a concrete switch sleeper in a matching way; the movable steel sleeper, the fixed steel sleeper and the concrete switch sleeper are arranged along the width direction of the middle transition plate and the side transition plates; the two ends of the movable steel sleeper and the fixed steel sleeper in the length direction are in matched connection with the side transition plates through connecting rod telescopic mechanisms; and the steel rails of the railway steel bridge beam are fixedly arranged on the upper parts of the side transition plate, the movable steel sleeper, the fixed steel sleeper and the concrete switch sleeper. When the girder bridge abutment on two sides rotates at the girder end, the middle transition plate vibration damping support on the upper part of the girder bridge abutment can achieve the purpose of reducing the corner of the girder end. It has the problems that: firstly, the angle of a beam end is reduced through the vibration damping support, the scissors connecting rod mechanism is a transmission mechanism and is not provided with a bidirectional hinged support, and when a bridge deck at the beam seam beam end has a large angle of rotation, the whole scissors connecting rod mechanism cannot adapt to the change and is easy to block; secondly, the vibration damping support has limited capacity of reducing the corner of the beam end, and when a bridge deck at the beam joint beam end has a larger corner, the structure of the bridge deck is easy to damage.

CN103469726B, name "a big displacement railway bridge beam-ends telescoping device", include: the concrete sleepers are arranged on the adjacent first bridge and second bridge; the fixed steel sleepers are respectively provided with a first fixed steel sleeper and a second fixed steel sleeper at the beam ends corresponding to the two bridges; four supporting beams are arranged above the concrete sleeper and the fixed steel sleeper along the length direction of the steel rail, one end of each supporting beam is a fixed end, the other end of each supporting beam is a movable end, the fixed ends are fixedly connected with a first concrete sleeper and a first fixed steel sleeper arranged on the first bridge, and the movable ends are movably connected with a second concrete sleeper and a second fixed steel sleeper arranged on the second bridge; and at least one movable steel sleeper is arranged between the first bridge and the second bridge and is connected with the bottom of the supporting beam. The patent has the remarkable characteristics that: the one-way telescopic beam end telescopic device and the scissors link mechanism are 'single scissors', and 2 movable steel sleepers are adopted to realize large-displacement one-way telescopic of beam seams. The patent has the remarkable characteristics that: the one-way telescopic beam end telescopic device and the scissors link mechanism are 'single scissors', and two movable steel sleepers are adopted to realize large-displacement one-way telescopic of a beam seam. It has the problems that: firstly, the device can only be suitable for unidirectional expansion of the beam end, and the total expansion amount is limited; secondly, two movable steel sleepers are adopted, and compared with a single movable steel sleeper mode, the structure has unstable operation factors and is easy to generate blockage; thirdly, the traditional scissors link mechanism is adopted, when a larger vertical or transverse corner appears at the beam end, adaptation can not be made in response, and the blocking phenomenon is easy to occur.

Disclosure of Invention

The design purpose is as follows: the reinforced scissors link mechanism suitable for the beam end bidirectional expansion device is designed, can expand and contract along with a steel rail expansion piece, meets the requirement of corner deformation of the beam end in the horizontal and vertical directions, and is flexible in rotation and small in friction force; when the beam seam has larger horizontal and vertical corners and the corner of the beam end is more than 10 per mill, the whole scissor fork mechanism cannot deform and block and can stretch along with the steel rail expansion piece, the requirements of the horizontal and vertical corner deformation of the beam end are met, the rotation is flexible, the friction is small, and the beam end bidirectional expansion device ensures the driving safety of a train.

The design scheme is as follows: in order to achieve the above design objectives. The utility model discloses in the scheme design: 1. the utility model discloses use two-way revolute pair scissors link mechanism to adapt to the change of beam-ends corner. In order to ensure the continuity, safety and stability of the railway track structure at the long-span steel bridge seam, a beam-end bidirectional expansion device needs to be arranged at the beam seam according to the design requirements of a bridge, and the beam-end bidirectional expansion device is matched with a steel rail expansion device. The utility model discloses on background art's basis, change background art theory of operation, be applicable to the two-way telescoping device of two-way flexible beam-ends, scissors link mechanism need use in pairs in fixed cab apron both sides, and the beam seam is located fixed cab apron below, between the hinged-support. When the width of the beam gap changes, the driving steel sleeper and the driven steel sleeper are driven to move, and then the scissors link mechanisms on the two sides are driven to stretch, and the position of the middle transition plate is relatively unchanged. Design adaptable beam seam width variation +/-800 mm's bridge on application condition, adopt two-way rotation hinged-support, when great level, vertical corner take place for the beam seam for when the fixed many directions of cab apron nonparallel of initiative steel sleeper, driven sleeper and sequence number, all can adjust through hinged-support, constantly keep the ride comfort of rail top surface, and then guarantee train driving safety.

The active support and the active steel sleeper are fixedly installed through bolt connecting pieces, the active steel sleeper is connected with the frame foundation in a welding mode, a large number of hook ribs are arranged on the lower portion of the frame foundation and are poured together with the track bed plate through concrete, and the connecting pieces except the frame foundation move along with the expansion of the bridge.

The driven support and the driven steel sleeper are fixedly installed through a bolt connecting piece and can move left and right on the upper surface of the frame foundation.

Concrete turnout slabs (track bed slabs) are connected with bridge decks through concrete pouring, and beam joints with variable widths are arranged between the bridge decks.

The transition plate spans the frame foundation and is connected with the scissors link mechanism through a bidirectional hinged support fixed on the bridge deck, so that the bridge deck can adapt to the expansion and contraction of the bridge deck and the change of the corner of the beam end.

The technical scheme is as follows: a driven steel sleeper located on one side of a transition plate and a driving steel sleeper located on the other side of the transition plate are respectively provided with a scissor link mechanism, one ends of two sets of scissor link mechanisms are respectively connected with two-way hinged supports located on two sides of the transition plate, and the other ends of the two sets of scissor link mechanisms are respectively connected with the driven steel sleeper and the driving steel sleeper to be suitable for a bridge with the beam seam width variation of +/-800 mm.

Compared with the prior art, the utility model has the advantages that firstly, the scissors link mechanism is originally connected with the fixed transition plate by the bidirectional hinge support, the horizontal and vertical rotation angle of the ultra-large beam end at the beam joint can be adapted, and the whole mechanism is flexible to rotate and is not easy to block; the driven steel sleeper is connected with the connecting rod mounting base through a bolt and freely moves along with the extension of the connecting rod, the connecting rod foundation can be prevented from upwarping, and the extension stability of the whole mechanism is ensured; thirdly, the friction surface of the connecting rod and the connecting rod is provided with an ultra-high molecular weight polyethylene small-resistance anti-friction washer, so that the rotating friction force of a connecting rod joint can be reduced to the greatest extent, and the strength is reliable; fourthly, connecting holes of the connecting rod joint and connecting holes of the base B are provided with high-strength shaft sleeves, so that the shearing stress from the bolt or the base pin shaft can be resisted to the greatest extent.

Drawings

FIG. 1 is a schematic view of a beam-end bi-directional expansion device.

Fig. 2 is a schematic partial top view of fig. 1.

Fig. 3 is a schematic view of the left part of fig. 2.

Fig. 4 is a schematic view of the structure of fig. 3.

Fig. 5 is a three-dimensional model diagram of the scissors linkage mechanism in fig. 1 for explaining the structure of the present invention, and if the color of the diagram does not meet the requirement, the diagram can be deleted.

Detailed Description

Example 1: reference is made to fig. 1-4. A driven steel sleeper 6 positioned on one side of a transition plate 3 and a driving steel sleeper 5 positioned on the other side of the transition plate 3 are respectively provided with a scissor link mechanism, one ends of two sets of scissor link mechanisms are respectively connected with two-way hinged supports 4 positioned on two sides of the transition plate 3, and the other ends of the two sets of scissor link mechanisms are respectively connected with the driven steel sleeper 6 and the driving steel sleeper 5 to be suitable for a bridge with a beam seam 10 width variable quantity of +/-800 mm.

The driving support 1 and the driving steel sleeper 5 are fixedly installed through a bolt connecting piece, the driving steel sleeper 5 is connected with the frame foundation 7 in a welding mode, a large number of hook ribs are arranged on the lower portion of the frame foundation 7 and poured together with the track bed plate 8 through concrete, and the driving support 1, the driving steel sleeper 5 and the track bed plate 8 move along with the expansion of the bridge. The driven support 2 and the driven steel sleeper 6 are fixedly installed through a bolt connecting piece and move left and right on the upper surface of the frame foundation 7. The road bed plate 8 is connected with the bridge deck plates 9 through concrete pouring, and a beam gap 10 with variable width is arranged between the two bridge deck plates 9. The transition plate 3 spans the frame foundation 7 and is connected with the scissors link mechanism through the bidirectional hinged support 4 fixed on the bridge deck, so that the bridge deck can adapt to the expansion of the bridge deck and the change of the corner of the beam end.

Become two long connecting rod middle part stack trompils in the scissors link mechanism and insert the bolt articulated portion that the bolt constitutes X scissors digging arm and be connected with installation base A, two arm heads in the left side of X scissors digging arm are articulated with left part short connecting rod one end respectively, two short connecting rod other ends stack of left part are articulated through bolt B and are connected with installation base A, the right side arm head of X digging arm is articulated with right part short connecting rod one end respectively, two short connecting rod other ends stack of right part and the articulated horizontal direction revolute pair that forms of joint iron other end, connect and form vertical direction revolute pair between iron one end and the installation base B.

The active steel sleeper 5 is connected to the steel beam at the beam joint beam end or the concrete bridge deck. The lower part of the driving steel sleeper 1 is connected with the bridge, and the upper part is connected with the connecting rod mounting base through a bolt.

And the driven steel sleeper 6 is connected with the connecting rod mounting base through a bolt and can freely move along with the extension of the connecting rod.

The lower part of the mounting base B14 is welded with the transition plate 3 of the telescopic device at the two ends and is connected with the joint iron 15 through a bolt pair, and the other end of the joint iron is connected with the connecting rod, and finally, a hinged connection structure which can freely rotate in the vertical and horizontal directions is formed. The joint of the connecting rod is connected through a mounting base or a bolt pair, and a small-resistance anti-friction washer is arranged on the friction surface of the connecting rod and the connecting rod. The connecting rod joint connecting hole is provided with a high-strength shaft sleeve.

The driving steel sleeper 1 is connected with the bridge deck through concrete pouring and moves along with the expansion of the beam gap bridge deck.

The installation base A comprises 2 pieces, the driving steel sleeper 5 and the driven steel sleeper 6 are respectively fixedly installed through a bolt D15, a common nut 16, a rubber cushion 21 and a spring washer 22, and the rubber cushion 21 is arranged between the lower surface of the installation base and the top surface of the steel sleeper.

The driven steel sleeper 6 is positioned on the bridge deck without any connection, and the bridge deck provides a supporting plane for the sliding of the driven steel sleeper.

The mounting base B is directly welded on the upper surface of the transition plate 3 to form a whole with the transition plate.

And interference fit is respectively formed between the connecting hole of the mounting base B and the outer surface of the shaft sleeve B and between the connecting iron hole of the joint and the outer surface of the shaft sleeve A.

One end of the joint iron is connected with the mounting base B through a bolt A12, a slotted nut 17, a cotter 18 and a flat washer 20 to form a vertical direction revolute pair, and the other end of the joint iron is connected with the two short connecting rods through a bolt B14, a slotted nut 17, a cotter 18, an antifriction washer 19 and a flat washer 20 to form a horizontal direction revolute pair. The joints of the short connecting rod and the long connecting rod are in interference fit with the shaft sleeve C11 to form a reinforced revolute pair.

According to the method for extending the two-way telescopic device at the beam end, the scissors link mechanisms are required to be used for fixing two sides 3 of the transition plate in pairs, the beam seam 10 is located below the transition plate 3 and between the two-way rotating hinged supports 4, when the beam seam has a large horizontal and vertical corner, the driving steel sleeper 5 and the driven steel sleeper 6 are not parallel to the transition plate 3 in multiple directions and can be adjusted through the two-way rotating hinged supports 4, and then when the scissors link mechanisms at the two sides are driven to extend and retract, the position of the transition plate 3 in the middle is relatively unchanged, the smoothness of the top surface of a steel rail is kept constantly, and the driving safety of a train is further guaranteed.

The driving support 1 and the driving steel sleeper 5 are fixedly installed through a bolt connecting piece, the driving steel sleeper 5 is connected with the frame foundation 7 in a welding mode, a large number of hook ribs are arranged on the lower portion of the frame foundation 7 and poured together with the track bed plate 8 through concrete, and the driving support 1, the driving steel sleeper 5 and the track bed plate 8 move along with the expansion of the bridge. The driven support 2 and the driven steel sleeper 6 are fixedly installed through a bolt connecting piece and move left and right on the upper surface of the frame foundation 7. The road bed plate 8 is connected with the bridge deck plates 9 through concrete pouring, and a beam gap 10 with variable width is formed between the two bridge deck plates 9. The transition plate 3 spans the frame foundation 7 and is connected with the scissors link mechanism through the bidirectional hinged support 4 fixed on the bridge deck, so that the bridge deck can adapt to the expansion of the bridge deck and the change of the corner of the beam end.

It is to be understood that: although the above embodiment is right the utility model relates to a making detailed description of characters of thinking, but the description of these characters is only right the utility model relates to a simple description of characters of thinking, rather than right the utility model relates to a restriction of thinking, any does not surpass the utility model relates to a combination, increase or modification of thinking all fall into the utility model discloses a within the scope of protection.

Claims

1. A beam-end bidirectional telescopic device is characterized in that: and a driven steel sleeper (6) positioned on one side of the transition plate (3) and a driving steel sleeper (5) positioned on the other side of the transition plate (3) are respectively provided with a scissors link mechanism, one ends of two sets of scissors link mechanisms are respectively connected with two-way hinged supports (4) positioned on two sides of the transition plate (3), and the other ends of the two sets of scissors link mechanisms are respectively connected with the driven steel sleeper (6) and the driving steel sleeper (5) to be together suitable for a bridge with the width variation of a beam joint (10) of +/-800 mm.

2. The beam-end bi-directional expansion device of claim 1, wherein: the driving support (1) and the driving steel sleeper (5) are fixedly installed through a bolt connecting piece, the driving steel sleeper (5) is connected with a frame foundation (7) in a welding mode, a large number of hook ribs are arranged on the lower portion of the frame foundation (7) and poured together with a track bed board (8) through concrete, and the driving support (1), the driving steel sleeper (5) and the track bed board (8) move along with the expansion of a bridge.

3. The beam-end bi-directional expansion device of claim 1, wherein: the driven support (2) and the driven steel sleeper (6) are fixedly installed through a bolt connecting piece and move left and right on the upper surface of the frame foundation (7).

4. The beam-end bi-directional expansion device of claim 1, wherein: the road bed plate (8) is connected with the bridge deck plates (9) through concrete pouring, and a beam gap (10) with variable width is arranged between the two bridge deck plates (9).

5. The beam-end bi-directional expansion device of claim 1, wherein: the transition plate (3) spans the frame foundation (7) and is connected with the scissors link mechanism through a bidirectional hinged support (4) fixed on the bridge deck, so that the telescopic bridge deck and the change of the beam end corner can be adapted.

6. The beam-end bi-directional expansion device of claim 1, wherein: a transition plate (3) is arranged between the two driving steel sleepers (5), a driven steel sleeper (6) is arranged between the transition plate (3) and the driving steel sleepers (5), the driven steel sleepers (6) and the transition plate (3) are respectively provided with a driving support (1), a driven support (2) and a bidirectional hinged support (4), and the driving support (1), the driven support (2) and the hinged support (4) form a scissors connecting rod mechanism together with the long connecting rod and the short connecting rod.

7. The beam-end bi-directional expansion device of claim 6, wherein: in the finished scissors link mechanism, the middle parts of two long connecting rods are superposed, holes are drilled, bolts are inserted, X scissors moving arms are formed, the bolt hinging parts of the X scissors moving arms are connected with an installation base A11, two arm heads on the left side of the X scissors moving arms are respectively hinged with one end of a left short connecting rod, the other ends of the two left short connecting rods are superposed, and are hinged through a bolt B and connected with the installation base A, the right arm heads of the X moving arms are respectively hinged with one end of a right short connecting rod, the other ends of the two right short connecting rods are superposed and hinged with the other end of a joint iron to form a horizontal rotation pair, and one end of the joint iron is connected with the installation base B to form a vertical rotation pair.

8. The beam-end bi-directional expansion device of claim 6, wherein: the lower part of the mounting base B is welded with the transition plates (3) of the telescopic devices at the two ends, and is connected with the joint iron through a bolt pair, and the other end of the joint iron is connected with the connecting rod, so that a hinged connection structure which can freely rotate in the vertical and horizontal directions is finally formed.

9. The beam-end bidirectional expansion device of claim 1, wherein: the joint of the connecting rod is connected through a mounting base or a bolt pair, and a small-resistance anti-friction washer is arranged on the friction surface of the connecting rod and the connecting rod.

10. The beam-end bidirectional expansion device of claim 1, wherein: the connecting rod joint connecting hole is provided with a high-strength shaft sleeve.