CN216615477U

CN216615477U - Scissors link mechanism for beam end telescoping device

Info

Publication number: CN216615477U
Application number: CN202122047325.3U
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: 2022-05-27
Anticipated expiration: 2031-08-28

Abstract

The utility model relates to a method for improving the stability of a beam seam when the beam seam is in a large level, when the steel rail telescopic device is vertically rotated, when the beam end is rotated by more than 10 per mill, the whole scissor fork mechanism cannot be deformed and blocked, and can also be stretched along with the steel rail telescopic device, a bolt is inserted into the middle superposed hole of two long connecting rods to form an X scissor movable arm, the bolt hinged part of the X scissor movable arm is connected with an installation base A4, two arm heads on the left side of the X scissor movable arm 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 hinged through a bolt B and connected with the installation base A, the right arm head of the X movable arm is 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.

Description

Scissors link mechanism for beam end telescoping device

Technical Field

The utility model relates to a scissors link mechanism for a beam end telescopic device, which can not only prevent the whole scissors fork mechanism from deformation and blockage when a beam joint has a large horizontal and vertical corner and the beam end has a corner more than 10 per mill.

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 threaded 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 pin shaft adjusting gasket is sleeved on the threaded section and clamped with the clamping step, and the upper surface of the pin shaft adjusting gasket is positioned on the upper side of the upper surface of the upper scissor arm assembly; 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 suitable for the expansion of a bridge beam seam in a single direction, when the corners of the beam ends of the bridge seam are oversized, the long connecting rod and the short connecting rod are easily distorted, and the whole scissors linkage mechanism is easily blocked.

Disclosure of Invention

The design purpose is as follows: the reinforced scissors link mechanism suitable for the beam end expansion device is designed, can expand along with the 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 a 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 a 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 running safety of a train is ensured.

The design scheme is as follows: in order to achieve the above design objectives. In order to ensure the continuity, safety and stability of the railway track structure at the long-span steel bridge seam, a beam end expansion device needs to be arranged at the beam seam according to the design requirements of a bridge, and the beam end expansion device is matched with a steel rail expansion device. On the basis of the background technology, the utility model changes the working principle of the background technology and is suitable for a bidirectional telescopic beam end telescopic device, the scissors link mechanisms are required to be used on two sides of a fixed transition plate in pairs, and beam seams are positioned below the fixed transition plate and between hinged supports 4. When the width of the beam gap changes, the driving steel sleeper and the driven steel sleeper are driven to move, so that 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 technical scheme is as follows: a shear link mechanism for a beam-end telescopic device is characterized in that a bolt is inserted into a superposed hole in the middle of two long connecting rods to form an X-shaped shear movable arm, a bolt hinged portion of the X-shaped shear movable arm is connected with an installation base A4, two arm heads on the left side of the X-shaped shear movable arm are hinged to one end of a left short connecting rod respectively, two other ends of the left short connecting rod are superposed and hinged to the installation base A through bolts B, the right arm head of the X-shaped movable arm is hinged to one end of a right short connecting rod respectively, the other ends of the two right short connecting rods are superposed and hinged to 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.

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 angles of the oversized 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 the 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 top view of a scissor linkage for a beam end telescoping device.

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

Fig. 3 is a side view schematic of fig. 2.

FIG. 4 is a three-dimensional model of the scissors linkage mechanism of FIG. 1 for illustrating the structure of the present invention, and if the colors of the diagram are not satisfactory, they can be deleted.

Fig. 5 is a background art schematic.

Detailed Description

Example 1: reference is made to fig. 1-3. The utility model provides a 6 middle part stack trompils of two long connecting rods insert the bolt and constitute X scissors digging arm and the bolt articulated portion of X scissors digging arm is connected with installation base A4, two arm heads in the left side of X scissors digging arm are articulated with 5 one end of the short connecting rod in left part respectively, 5 other end stacks of two short connecting rods in left part are articulated through bolt B13 and are connected with installation base A4, the right side arm head of X digging arm is articulated with 5 one end of the short connecting rod in right part respectively, 5 other end stacks of the short connecting rod in two right parts and articulate with the 8 other end of joint iron and form the horizontal direction revolute pair, connect and form vertical direction revolute pair between 8 one end of joint iron and the installation base B7.

The other end of the joint iron A8 and the two right short connecting rods 5 are connected through a bolt B13, a slotted nut 17, a cotter pin 18, an antifriction washer 19 and a flat washer 20 to form a horizontal direction rotation pair. One end of the joint iron 8 is connected with the mounting base B7 through a bolt A12, a slotted nut 17, a cotter pin 18 and a flat washer 20 to form a vertical rotation pair.

The joints of the short connecting rod 5 and the long connecting rod 6 are in interference fit with the shaft sleeve C11 to form a reinforced revolute pair.

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; 2 installation bases A4 are respectively fixed on the driving steel sleeper 1 and the driven steel sleeper 2 through bolts D15, common nuts 16, rubber mats 21 and spring washers 22, the rubber mats 21 and the lower surface of the installation base 4 are arranged between the steel sleeper top surface and the driven steel sleeper 2 is arranged on the bridge deck without any connection, the bridge deck provides a supporting plane for the sliding of the driven steel sleeper, and the installation base B7 is directly welded on the upper surface of the transition plate 3 and forms a whole with the bridge deck.

The lower part of the driving steel sleeper 1 is connected with the bridge, and the upper part of the driving steel sleeper 1 is connected with a connecting rod mounting base A4 through a bolt.

The driven steel sleeper 2 is connected with the connecting rod mounting base A4 through a bolt and freely moves along with the extension and contraction of the connecting rod.

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 bases A4 are 2 pieces, and are respectively installed and fixed on the driving steel sleeper 1 and the driven steel sleeper 2 through bolts D15, common nuts 16, rubber pads 21 and spring washers 22, and the rubber pads 21 and the installation bases 4 are arranged between the lower surfaces of the pads and the top surfaces of the steel sleepers.

The driven steel sleeper 2 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 B7 is welded directly to the upper surface of the transition plate 3, forming an integral part therewith.

Interference fit is respectively formed between the connecting hole of the mounting base B7 and the outer surface of the shaft sleeve B10 and between the connecting hole of the joint iron 8 and the outer surface of the shaft sleeve A9.

One end of the joint iron 8 is connected with the mounting base B7 through a bolt A12, a slotted nut 17, a cotter 18 and a flat washer 20 to form a vertical direction rotating pair, and the other end of the joint iron A8 is connected with the two short connecting rods 5 through a bolt B13, a slotted nut 17, a cotter 18, an antifriction washer 19 and a flat washer 20 to form a horizontal direction rotating pair.

It is to be understood that: although the foregoing embodiments have described the design concept of the present invention in detail, these descriptions are only used for describing the design concept of the present invention in brief, and not for limiting the design concept of the present invention, and any combination, addition or modification that does not exceed the design concept of the present invention falls within the scope of the present invention.

Claims

1. The utility model provides a scissors link mechanism for beam-ends telescoping device which characterized by: two long connecting rods are overlapped in the middle, a hole is inserted into a bolt to form an X scissors movable arm, a bolt hinge portion of the X scissors movable arm is connected with an installation base A, two arm heads on the left side of the X scissors movable arm are respectively hinged with one end of a left short connecting rod, two left short connecting rod other ends are overlapped and hinged through a bolt B and connected with the installation base A, the right arm head of the X scissors movable arm is respectively hinged with one end of a right short connecting rod, the other ends of the two right short connecting rods are overlapped 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.

2. The scissors linkage for a beam-end retractor of claim 1 wherein: the other end of the joint iron A is connected with the two right short connecting rods through a bolt B, a slotted nut, a cotter pin, an antifriction washer and a flat washer to form a horizontal rotating pair.

3. A scissors linkage for a beam end expansion device according to claim 1, wherein: one end of the joint iron is connected with the mounting base B through a bolt A, a slotted nut, a cotter pin and a flat washer to form a vertical rotation pair.

4. The scissors linkage for a beam-end retractor of claim 1 wherein: the joints of the short connecting rod and the long connecting rod are in interference fit with the shaft sleeve C to form a reinforced revolute pair.

5. The scissors linkage for a beam-end retractor of claim 1 wherein: the driving steel sleeper is connected with the bridge deck through concrete pouring and moves along with the expansion of the beam gap bridge deck; two installation base A pass through bolt D, nut, cushion, spring washer and install respectively and be fixed in initiative steel pillow, driven steel pillow, between cushion and installation base lower surface and the steel pillow top surface, driven steel pillow is located on the decking, does not do any connection, and the decking provides the supporting plane for the slip of driven steel pillow, and installation base B lug weld is in cab apron upper surface, rather than constituteing a whole.

6. The scissors linkage for a beam-end retractor of claim 5 wherein: the lower part of the driving steel sleeper is connected with the bridge, and the upper part of the driving steel sleeper is connected with the connecting rod mounting base A through a bolt.

7. The scissors linkage for a beam-end retractor of claim 5 wherein: the driven steel sleeper is connected with the connecting rod installation base A through a bolt and freely moves along with the extension of the connecting rod.

8. The scissors linkage for a beam-end retractor 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.

9. The scissors linkage for a beam-end retractor of claim 1 wherein: the connecting rod joint connecting hole is provided with a high-strength shaft sleeve.