Quickly-mounted bolt-free elastic strip fastener and mounting method thereof

Abstract

The rapid installation bolt-free elastic strip fastener comprises an iron base plate, a track gauge block, a rapid elastic strip and an elastic strip cap, an elastic strip seat is arranged on the iron base plate, and the elastic strip seat is provided with a front beam with a meshing recess and an upper cross beam connected with clamping parts on the two sides. The lower surfaces of the clamping parts on the two sides of the elastic strip seat are provided with retaining structures which are slowly lowered from the front end to the rear end and then are suddenly raised to form a concave shape, and the gauge block is provided with a slope sliding table which can penetrate through a front beam of the elastic strip seat to be supported on an iron base plate in the elastic strip seat, so that the quick elastic strip in the pre-installation state is kept on the slope sliding table. The gauge block is meshed with the front beam of the elastic strip seat through an upper connecting beam with a reinforcing rib, and the upper end of the elastic strip cap is provided with a convex baffle table which is matched with the upper beam of the elastic strip seat so as to be positioned during pre-installation. The steel rail buckle is convenient to install and maintain, low in cost, not prone to damage, low in abrasion, long in service life and high in steel rail buckling stability.

Description

Technical Field

[0001] The invention relates to the field of rail transportation, and in particular to a bolt-free spring clip fastener that can be quickly installed and an installation method thereof. Background Art

[0002] With the development of rail transit technology, rail fastener technology has also improved, which has put forward higher requirements for fasteners that are easy and convenient to install, stable and safe to use, and easy to maintain.

[0003] CN105714623B discloses a fast spring clip ballastless track iron pad fastener system, comprising: a fast spring clip, a cast iron base plate located below the rail, and a rail pad located between the rail and the cast iron base plate; the cast iron base plate comprises at least two spring clip fixing devices perpendicular to the rail, the fast spring clip is vertically mounted on the cast iron base plate and presses the rail through the spring clip fixing devices, the spring clip fixing device also comprises a protruding block, the protruding block has a certain height, the spring clip fixing device comprises a limiting device for limiting the movement of the fast spring clip in a direction perpendicular to the ground, the fast spring clip is M-shaped, double-toe contacts with the cast iron base plate, and is vertically mounted on the cast iron base plate with the rail, the limiting device is a dome structure arranged on the spring clip fixing device, a track gauge block positioning device is arranged on the dome structure, and a spring clip positioning and back-stopping device is arranged on the dome structure. The iron protrusion has a high friction coefficient and is integrated into the spring bar fixing device, which makes it easy to form a misalignment between it and the gauge block, making the spring bar easy to wear during installation. In addition, the design of the gauge block positioning device is complex, which not only increases the difficulty of production, but also makes the installation complicated and prone to damage during on-site construction and installation. Furthermore, the insulating cap has a depression at the bottom, which reduces its strength, and the contact surface with the boss and the rail is very thin and easy to wear, resulting in a smaller spring range of the spring bar, resulting in a reduction in the buckle pressure, which affects the stability of the rail.

[0004] CN110158374B discloses a split symmetrical iron seat fastener system, in which a pre-installed boss is arranged on an auxiliary mounting plate, and the auxiliary mounting plate is arranged on an anchor bolt nut. Although the pre-installed boss can be made of nylon to reduce the friction coefficient, there will still be a misalignment between it and the gauge block. Summary of the invention

[0005] In order to overcome the above problems, the inventors have conducted intensive research, eliminated the raised block of the iron pad, extended the gauge block toward the outer side of the rail, and set a slope slide. The slope slide can pass through the front beam of the spring bar seat and be supported on the iron pad. The gauge block is engaged with the spring bar seat through an upper connecting beam with reinforcing ribs. The lower surface of the clamping part on both sides of the spring bar seat is configured to slowly decrease from the front end to the rear end and then rise sharply to form a concave stop structure. A raised stop is set on the upper end or both sides of the spring bar cap, which cooperates with the upper cross beam of the spring bar seat to position during pre-installation, so as to obtain a quick-installation boltless spring bar fastener, which is easy to install and maintain, has low cost, is not easy to damage, has low wear, has a long service life, and has strong stability in clamping the rails.

[0006] The present invention aims to provide the following aspects:

[0007] 1. A fast-installed boltless spring clip fastener, comprising an iron plate, a gauge block, a fast spring clip and a spring clip cap, wherein a spring clip seat is arranged on the iron plate, and the characteristics are as follows:

[0008] The spring clip seat has a front beam with an engaging recess and an upper cross beam connecting the clamping parts on both sides. The gauge block has a slope slide that can pass through the front beam of the spring clip seat and is supported on the iron pad inside the spring clip seat, so that the pre-installed fast spring clip is kept on the slope slide and a non-misaligned slide is provided for the installation of the fast spring clip.

[0009] The gauge block is configured to engage with the front beam of the spring bar seat through an upper connecting beam with reinforcing ribs.

[0010] A raised stop is provided on the upper end or both sides of the spring bar cap, which cooperates with the cross beam on the spring bar seat or the recessed clamping parts on both sides to position it during pre-installation.

[0011] 2. The quick-install boltless spring clip fastener as described in 1 above is characterized in that:

[0012] The gauge block is made of nylon.

[0013] The slope surface on the ramp slide of the gauge block decreases toward the outer side of the rail, and the slope surface is connected to the top surface of the connecting beam on the gauge block through a smooth transition surface.

[0014] A through opening hole is provided at the lower part of the slope slide.

[0015] 3. The quick-install boltless spring clip fastener as described in 1 above is characterized in that the quick-install boltless spring clip fastener also includes a rail pad, the edge of which has meshing teeth, and the gauge block has lower meshing teeth that cooperate with the edge meshing teeth of the rail pad.

[0016] 4. The quick-install boltless spring clip fastener as described in 1 above is characterized in that:

[0017] The lower surface of the clamping part on both sides of the spring clip seat is set to slowly decrease from the front end to the rear end and then rise sharply to form a concave stop structure. The front edge of the spring clip seat is straight, and the inner side of the near-rail part of the gauge block is straight. When the gauge block and the spring clip seat are meshed, the front edge of the spring clip seat is tightly attached to the inner side of the near-rail part of the gauge block.

[0018] Preferably, the inner wall of the clamping part on both sides of the spring bar seat is provided with a depression, and also provided with a slideway for the raised stoppers on both sides of the spring bar cap to slide, and the depression is located in the slideway.

[0019] Preferably, recesses are provided on the upper surfaces of the clamping parts on both sides of the spring bar seat to position the upper part of the spring bar toe end during pre-installation.

[0020] 5. The quick-install boltless spring clip fastener as described in 1 above is characterized in that:

[0021] The iron pad includes two centrally symmetrical spring bars, which are installed on both sides of the rail.

[0022] The iron pad also includes an opening near the spring bar seat, in which an anchor bolt is installed to fix it on the sleeper.

[0023] 6. The quick-install boltless spring clip fastener as described in 1 above is characterized in that:

[0024] The spring cap is made of nylon.

[0025] The front side of the raised stopper at the upper end of the spring cap is an arc-shaped gentle slope, and the rear side is an inclined steep slope, or

[0026] The front side of the raised baffles on both sides of the spring bar cap is a gentle straight slope surface, and the rear side is an arc-shaped steep slope surface. The raised baffles also have straight sides, which are respectively connected to the front side and the rear side.

[0027] The lower edge of the bottom of the spring cap is a sloped surface with a certain width, and the slope of the sloped surface is consistent with the slope of the top surface of the rail at the buckling position.

[0028] 7. The quick-install boltless spring clip fastener as described in 1 above is characterized in that:

[0029] The lower edge of the bottom of the spring bar cap is provided with a friction-reducing protective layer, and the protective layer is a smooth metal or a high-strength, low-friction-coefficient polymer material layer.

[0030] 8. The quick-install boltless spring clip fastener as described in 1 above is characterized in that it also includes an insulating coupling pad, which is arranged under the iron pad.

[0031] 9. The quick-install boltless spring clip fastener as described in 8 above is characterized in that:

[0032] It also includes a plate height adjustment pad under the plate, which is arranged between the iron pad and the insulating coupling pad, or under the insulating coupling pad.

[0033] 10. The method for quickly installing a boltless spring clip fastener as described above is characterized in that the method includes a pre-installation process of the spring clip fastener, and the pre-installation process includes the following steps:

[0034] (1) Place an iron pad, place the rail pad on it, embed the gauge block into the spring bar seat on the iron pad, support the ramp slide on the iron pad in the spring bar seat, and clamp the rail pad with the gauge block.

[0035] (2) Place the spring bar cap with a spring bar cap at the middle tip on the spring bar seat on the iron pad, so that the middle tip (middle toe) of the spring bar enters the middle channel of the spring bar seat, and the toes on both sides of the spring bar are respectively located outside the clamping parts on both sides of the spring bar seat, and push the spring bar to slide into the iron seat. Stop pushing when the raised stop on the spring bar cap passes through or enters the positioning structure on the spring bar seat.

[0036] The quick-install boltless spring clip fastener and installation method thereof provided by the present invention have the following beneficial effects:

[0037] (1) The iron pad boss is removed, and the spring clip cap is installed by sliding into the track gauge block. The surface of the nylon track gauge block is smoother than that of the iron boss, which can reduce the wear of the spring clip cap during the installation of the fast spring clip;

[0038] (2) The nylon ramp slide is softer than the iron boss, which reduces the wear on the spring clip cap during the removal and assembly of the spring clip;

[0039] (3) The ramp slide is integrated on the gauge block to eliminate misalignment and improve assembly accuracy. The sliding process of the spring clip cap on the boss and the gauge block during the installation of the fast spring clip in the prior art is changed from two stages to one stage in the present application, effectively avoiding the jamming phenomenon during the installation and removal of the fast spring clip;

[0040] (4) The spring clip cap pre-installation positioning structure is arranged above or on both sides of the spring clip cap, which effectively prevents the bottom of the spring clip cap from being worn as the pre-installation positioning structure and becoming the main stress-bearing area, thereby improving the safety strength of the spring clip cap;

[0041] (5) After installation, the bottom of the spring clip cap is buckled on the rail. In normal long-term use, the bottom of the spring clip cap itself is subject to friction and wear caused by the lateral and longitudinal deformation of the rail. By setting the pre-installed positioning structure on the top or both sides of the spring clip cap, it is possible to avoid additional friction and damage to the bottom of the spring clip cap when the spring clip slides in and out, thereby avoiding additional reduction in the service life of the spring clip cap.

[0042] (6) The sharp design of the lower edge of the spring clip cap is replaced by a sloped surface with a certain width, which helps to reduce the wear on the top of the spring clip cap, thereby reducing the decrease in the fast spring clip buckle pressure caused by the reduction in the spring clip travel caused by the wear of the bottom of the spring clip cap, thereby enhancing the stability of the rail;

[0043] (7) The arc spherical surface structure design of the upper edge of the two toes of the spring clip ensures that the spring clip seat is not damaged by the insertion and removal of the two toes of the spring clip during the pre-installation, installation and removal process;

[0044] (8) A depression is provided on the upper surface of the clamping part on both sides of the spring clip seat, which cooperates with the upper edge of the two toe ends of the spring clip, and the upper part of the spring toe end of the spring clip is positioned during pre-installation, which is an effective improvement of the pre-installation positioning and further prevents the spring clip from withdrawing from the spring clip seat after the pre-installation is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram showing an installation structure of a preferred embodiment of the present invention is shown;

[0046] Figure 2 A schematic diagram showing an installation structure of another preferred embodiment of the present invention;

[0047] Figure 3 Shows Figure 2 Schematic diagram of the explosion structure;

[0048] Figure 4 A schematic diagram showing a pre-installation process of a preferred embodiment of the present invention;

[0049] Figure 5 A schematic diagram of the iron backing plate structure of a preferred embodiment is shown;

[0050] Figure 5' A schematic diagram of the spring bar seat structure of a preferred embodiment is shown;

[0051] Figure 5 A schematic diagram of the spring bar seat structure of a preferred embodiment is shown;

[0052] Figure 6 A schematic diagram of the rail pad structure of a preferred embodiment is shown;

[0053] Figure 7 A schematic diagram of the rail pad structure of a preferred embodiment is shown;

[0054] Figure 8 A schematic diagram showing the structure of a gauge block of a preferred embodiment is shown;

[0055] Figure 8' A schematic diagram showing the structure of a gauge block of a preferred embodiment is shown;

[0056] Fig. 9 A schematic diagram showing the structure of a gauge block of a preferred embodiment is shown;

[0057] Fig.10 A schematic diagram showing the structure of the spring bar cap of a preferred embodiment is shown;

[0058] Fig.11 A schematic diagram showing the structure of the spring bar cap of a preferred embodiment is shown;

[0059] Fig.12 A schematic diagram of the spring cap structure of another preferred embodiment is shown;

[0060] Fig.13 A schematic diagram showing the structure of a spring bar and a spring bar cap according to a preferred embodiment is shown;

[0061] Fig.14 A schematic diagram showing the structure of a spring bar and a spring bar cap according to a preferred embodiment is shown;

[0062] Description of Figure Numbers:

[0063] 1-Quick installation of boltless spring clip fasteners

[0064] 2-Iron pad

[0065] 21- Spring clip seat

[0066] 211-Front edge of spring clip seat

[0067] 212-The front beam of the spring bar seat is dented

[0068] 213- front end of the lower surface of the clamping side of the spring bar seat

[0069] 214- Rear end of the lower surface of the clamping side of the spring bar seat

[0070] 215-Retraction structure on the lower surface of the clamping side of the spring bar seat

[0071] 216-Clip seat upper crossbeam

[0072] 217-The upper surface of the clamping part of the spring bar seat is concave

[0073] 22-Clamping parts on both sides of the spring bar seat

[0074] 221-Depression

[0075] 222-Slide

[0076] 3-Rail Underpad

[0077] 31-Meshing teeth of rail pad edge

[0078] 4-Gauge Block

[0079] 41-Gauge Block Ramp Slide

[0080] 411-Slope surface on the slide

[0081] 412-Transition surface

[0082] 413-Top surface of connecting beam on gauge block

[0083] 414-Open hole at the bottom of the gauge block

[0084] 42-Gauge block lower meshing teeth

[0085] 43-front end slope of gauge block

[0086] 44-Gauge block upper connecting beam reinforcement

[0087] 45-Gauge block near rail

[0088] 5-Fast Clip

[0089] 6- Spring cap

[0090] 61- Raised stopper on the upper end of the spring cap

[0091] 611- The upper end of the spring cap is raised and the rear side of the baffle is inclined straight slope

[0092] 612- The upper end of the spring cap is raised and the front side of the baffle is curved and sloped

[0093] 62-Lower edge of the spring cap

[0094] 621-Protective layer of the lower edge of the spring cap

[0095] 63- Raised stops on both sides of the spring cap

[0096] 631-The front side of the raised baffle on both sides of the spring cap

[0097] 632- The rear side of the raised baffle on both sides of the spring cap

[0098] 633-The raised sides of the spring cap have flat sides

[0099] 7-Insulation coupling pad

[0100] 8-Heightening pad under the board

[0101] 9-Anchor bolt DETAILED DESCRIPTION

[0102] The present invention will be further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present invention will become more clear and distinct.

[0103] Therein, while various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless specifically noted.

[0104] As used herein, the term "front" in terms of orientation or direction refers to the direction in which the spring clip is inserted / moved during the pre-installation or installation of the spring clip, ie, the direction towards the rail.

[0105] In contrast, the azimuth or direction term "rear" refers to the direction opposite to the direction of insertion / displacement of the spring clip during pre-installation or installation of the spring clip, i.e., away from the rail.

[0106] As used herein, the terms "outside the rail", "outside the rail", and "far rail" are synonymous with the terms "far rail" and "far rail side" and refer to the direction away from the rail.

[0107] As used herein, the term "near rail side" or "far rail side" is used in contrast to the term "near rail side" and refers to the direction adjacent to the rail.

[0108] In the present invention, the fast-installed boltless spring clip fastener comprises an iron backing plate 2, a track gauge block 4, a fast spring clip 5 and a spring clip cap 6, and a spring clip seat is arranged on the iron backing plate 2.

[0109] In the present invention, the gauge block 4 has a near-rail portion 45 distributed from the near-rail side to the far-rail side, an upper connecting beam and a ramp slide 41. The ramp slide can pass through the front beam of the spring clip seat and be supported on the iron pad inside the spring clip seat, so that the pre-installed fast spring clip is kept on the ramp slide, and a non-misaligned slideway is provided for the installation of the fast spring clip. The upper connecting beam has a reinforcing rib and is meshed with the front beam of the spring clip seat. The near-rail portion is arranged between the rail and the spring clip seat.

[0110] In a preferred embodiment, the gauge block is integrally formed, and the slope surface 411 on the slope slide decreases toward the far rail side. The slope surface 411 is integrally connected to the top surface 413 of the connecting beam on the gauge block through a smooth transition surface 412, so as to provide a smooth slide without misalignment for the fast spring bar 5 during pre-installation and installation.

[0111] As for the transition surface 412, it is integrally formed with the slope surface 411 and the top surface 413 of the connecting beam on the gauge block, and can be a circular arc transition surface, such as Figure 8 As shown, a variable curvature camber transition surface can also be used, such as Figure 8-2 As shown, as long as the transition surface smoothly connects the slope surface 411 and the top surface 413 of the connecting beam on the gauge block, a smooth slideway without misalignment can be provided.

[0112] Of course, the transition surface may not be provided, and the slope surface 411 may be directly connected to the top surface 413 of the connecting beam on the gauge block (not shown in the figure). This can also provide a slideway without misalignment. However, when the fast spring bar 5 is pre-installed, the change angle is slightly larger when entering from the slope surface 411 to the top surface 413 of the connecting beam on the gauge block, which is relatively unpreferable.

[0113] In the present invention, the iron protrusion in the spring bar seat on the iron pad is eliminated, and the slope slide 41 of the gauge block is used to provide a slideway for the pre-installation and installation of the fast spring bar, thereby avoiding the misalignment caused by the two slideways, and further avoiding the jamming during the pre-installation / installation process.

[0114] In a preferred embodiment, the gauge block is integrally formed of nylon, and its friction coefficient is significantly lower than the iron raised block on the iron pad in the prior art, further reducing the wear of the middle tip of the spring bar or the spring bar cap during installation, disassembly and maintenance.

[0115] In the present invention, the upper connecting beam of the gauge block has reinforcing ribs, which are engaged with the front beam of the spring bar seat to better position and limit the gauge block and the spring bar seat.

[0116] The reinforcing ribs not only enhance the strength of the connecting beam on the gauge block, but also stably mount the gauge block on the spring clip seat 2, facilitating the subsequent quick spring clip pre-installation.

[0117] In a preferred embodiment, the spring bar seat 21 has a front beam with an engagement recess, which is configured to engage with the upper connecting beam of the reinforcing rib 44 of the gauge block 4. The front beam recess of the gauge block 4 engages with the protrusion formed by the reinforcing rib 44 of the upper connecting beam of the gauge block, and the gauge block is installed on the spring bar seat 2.

[0118] There are no special restrictions on the reinforcing ribs of the connecting beam and the meshing teeth of the front beam of the spring bar seat, as long as they can mesh with each other for positioning and limiting. For example, when the reinforcing ribs of the connecting beam of the gauge block are arranged along the extension direction of the track (not shown in the figure), the meshing teeth of the front beam of the spring bar seat are also arranged along the extension direction of the track (not shown in the figure); when the reinforcing ribs of the connecting beam of the gauge block extend toward the outer side of the track, the meshing teeth of the front beam of the spring bar seat also extend toward the outer side of the track.

[0119] However, in a preferred embodiment, the reinforcing ribs 44 of the upper connecting beam of the gauge block extend toward the outer side of the rail, and meshing teeth are formed between the plurality of reinforcing ribs and the lower bottom surface of the upper connecting beam, which cooperate with the concave and convex meshing teeth on the front beam of the spring bar seat, such as Fig. 9 As shown, the meshing teeth 212 of the front beam of the spring bar seat also extend in the same direction. Figure 5 As shown, the two can mesh with each other to provide stable positioning and limiting. In addition, this arrangement is also convenient for the gauge block ramp slide to pass through the spring bar seat and the configuration position adjustment.

[0120] In a preferred embodiment, the front edge 211 of the spring bar seat is straight, and the inner side of the near-rail portion 45 of the gauge block is straight. When the gauge block and the spring bar seat are engaged, the front edge of the spring bar seat is tightly attached to the inner side of the near-rail portion of the gauge block. No additional gauge block positioning device is required, the structure is simple, and the gauge block 4 is easy to assemble and disassemble.

[0121] In another preferred embodiment, a through opening 414 is provided at the bottom of the ramp slide. Fig. 9 By providing the through open hole 414, a deformation space is provided for the slope slide to be deformed by force during the pre-installation process of the fast spring clip, so as to prevent the slope slide from cracking or being damaged.

[0122] There is no particular limitation on the shape and structure of the open hole, and any through open hole known in the art can be used. For example, the open hole can be set as a straight hole, a curved hole, a square hole, a circular hole, a hole parallel to the extension direction of the track, a hole perpendicular to the extension direction of the track, etc., as long as it can provide deformation space for the slope slide to deform under force.

[0123] However, in a preferred embodiment, the opening hole 414 is arranged to extend in the direction toward the outside of the rail. Figure 3 and Fig. 9 As shown, in this case, the open hole can not only provide deformation space for the slide table to deform under stress, but also facilitate the integral production of the gauge block.

[0124] In a preferred embodiment, a lower meshing tooth 43 protruding downward is provided at the bottom of the rail-proximal end of the rail-proximal portion of the gauge block, and the meshing tooth 43 cooperates with the edge meshing tooth 31 of the rail pad 3 to clamp and fix the rail pad.

[0125] More preferably, the remaining portion of the bottom of the near-rail portion is a flat surface to compact the pad under the rail.

[0126] In another preferred embodiment, the quick-install boltless spring clip fastener includes a rail pad 7, whose upper surface has a protrusion to increase friction, the edge of the rail pad 7 has meshing teeth 31, and the gauge block 4 has lower meshing teeth 42 to engage with the edge meshing teeth 31 of the rail pad, thereby fixing the rail pad 7 through the gauge block 4.

[0127] In the present invention, a raised stop is provided on the spring bar cap, which cooperates with the spring bar seat to position the spring bar during pre-installation. Compared with the prior art positioning method of providing a recess at the bottom of the spring bar cap, the present invention has a higher strength at the lower edge of the spring bar cap and is not easily damaged, and has more solid structures at the lower part and is not easily worn, thus overcoming or significantly improving the problem of reduced spring bar travel caused by damage and wear of the lower edge of the spring bar cap.

[0128] In a preferred embodiment, a raised stop 61 is provided at the upper end of the spring cap. Fig.10 shown.

[0129] In a further preferred embodiment, Fig.11 As shown, the front side surface 611 of the raised stop 61 at the upper end of the spring bar cap is an arc-shaped gentle slope, and the rear side surface 612 is an inclined steep slope, so that the front side surface 611 can pass through the upper cross beam 216 of the spring bar seat during the pre-installation process. After the pre-installation is completed, the rear side surface 612 is stably stuck on the upper cross beam 216 of the spring bar seat to prevent it from falling off during subsequent installation.

[0130] More preferably, the front side surface 612 and the rear side surface 611 are connected by a smooth arc surface, so that the raised stop 61 can slide over the upper crossbeam of the spring bar seat during pre-installation.

[0131] In this preferred embodiment, the spring bar seat 2 has an upper crossbeam 216 connecting the clamping parts on both sides. The upper crossbeam design throughout the body can stably connect the clamping parts on both sides of the spring bar seat to prevent the clamping parts on both sides from being deformed by force. Moreover, the upper crossbeam design throughout the body provides a basis for positioning the spring bar cap pre-installed on the spring bar.

[0132] In a preferred embodiment, the upper cross beam 216 is a narrow beam with a width in the range of 15-25 mm. In this case, the upper cross beam can not only provide sufficient connection strength and prevent the spring cap from retreating, but also provide more sufficient operating space for the gauge block to be assembled to the spring seat.

[0133] In this embodiment, when the spring clip is pre-installed, the middle portion of the fast spring clip 5 is inserted into the spring clip cap 6 and fixed therein to form an integral body, and then inserted into the spring clip seat on which the gauge block 4 has been assembled. The bottom of the spring clip cap passes through the upper surface of the ramp slide 41 of the gauge block, and the upper end stop of the spring clip cap 6 slides over the upper cross beam 216 of the spring clip seat to stop the insertion. The fast spring clip 5 is kept on the ramp slide, and the spring clip cap is clamped by the upper cross beam 216 of the spring clip seat to prevent the spring clip cap from retreating. Figure 4 shown.

[0134] In another preferred embodiment, Fig.13 As shown, raised stops 63 are provided on both sides of the spring bar cap.

[0135] In a further preferred embodiment, Fig.14 As shown, the front side surface 631 of the raised stopper on both sides of the spring bar cap is a gentle straight slope surface, and the rear side surface 632 is an arc-shaped steep slope surface. The raised stopper also has a straight side surface 633, which is respectively connected to the front side surface and the rear side surface, so that during the pre-installation process, the front side surface 631 is stably stuck in the recess 221 along the slide 222 of the inner wall of the clamping part 22 on both sides of the spring bar seat for positioning, and during the installation process, the front side surface 631 slides out of the recess 221.

[0136] The slideway 222 is provided on the inner wall of the clamping part on both sides of the spring bar seat, and the recess 221 is provided in the slideway 222. Figure 5' shown.

[0137] In this embodiment, when the spring clip is pre-installed, the middle portion of the fast spring clip 5 is inserted into the spring clip cap 6 and fixed therein to form a whole, and then inserted into the spring clip seat on which the gauge block 4 has been assembled. The bottom of the spring clip cap passes through the upper surface of the slope slide 41 of the gauge block, and the stops on both sides of the spring clip cap 6 slide over the slideways 222 of the clamping parts on both sides of the spring clip seat and enter the recess 221 to stop the insertion. The fast spring clip 5 is kept on the slope slide, and the spring clip cap is clamped by the clamping parts on both sides of the spring clip seat to prevent the spring clip cap from retreating (not shown in the figure).

[0138] In a preferred embodiment, the lower edge 62 of the bottom of the spring bar cap is a sloped surface with a certain width, and the slope of the sloped surface is consistent with the slope of the top surface of the rail at the buckling position to prevent wear of the bottom of the spring bar cap during pre-installation, installation and formal use.

[0139] In a further preferred embodiment, the lower edge 62 of the spring bar cap bottom has a friction-reducing protective layer 621, and the protective layer 621 is a metal layer, such as a cast iron layer, or a high-strength, low-friction polymer material layer, such as a polytetrafluoroethylene layer.

[0140] In a more preferred embodiment, the protective layer 621 extends from the lower edge 62 of the spring bar cap to the front end of the spring bar cap, or even to the top, to provide more complete protection.

[0141] The protective layer can be integrally injection molded with the spring cap 6, or can be fixed to the outer side of the lower edge 62 of the spring cap bottom. The fixing method is not limited. For example, a pre-buried hole or a pre-fabricated protrusion can be provided at the lower edge of the spring cap bottom, and a protrusion or a hole can be provided on the protective layer for fixing. Of course, other fixing methods can also be used, which is within the capabilities of those skilled in the art.

[0142] In a preferred embodiment, Fig.13 and Fig.14 As shown, the upper parts of the two toe ends of the spring clip are arc spherical surfaces to prevent the spring clip from scratching the spring clip seat during pre-installation, installation or removal.

[0143] In a preferred embodiment of the present invention, the lower surface of the clamping portion 22 on both sides of the spring bar seat is configured to slowly decrease from the front end to the rear end and then rise sharply to form a concave lower stop structure 215, such as Figure 5 The lower stop structure thus formed prevents the two toes of the quick spring from retreating after the quick spring is installed, as shown in FIG. Figure 1 and 2 shown.

[0144] Since the front end 213 of the lower surface of the clamping part on both sides of the spring clip seat slowly descends backwards and the rear end 214 rises steeply, the formed depression has a better precise positioning and stopping effect, so that the spring clip has almost no stopping travel after installation, ensuring that the installation state of each fastener spring clip in the line is basically the same, so as not to affect the stress state of the spring clip and the stability of the rail. In addition, such a structure makes the pre-installation and installation process of the quick spring 5 easier.

[0145] In a preferred embodiment, a depression and a protrusion are provided at the front end of the upper surface of the clamping part on both sides of the spring bar seat, and the protrusion rises gently toward the rear end to form an upper stop structure, which cooperates with the pits on the upper surface of the front end of the two toes of the fast spring bar 5 to prevent the two toes of the fast spring from retreating after the fast spring is installed. Figure 1 and 2 shown.

[0146] In another preferred embodiment, a recess 217 is provided on the upper surface of the clamping portion on both sides of the spring bar seat to position the upper end of the spring bar toe and cooperate with the upper ends of the two toes of the spring bar during pre-installation, and further position the upper end of the spring bar toe during pre-installation.

[0147] In a preferred embodiment, the fast-install bolt-free spring clip fastener further comprises a plate height adjustment pad 9 under the plate to adjust the height, which can be arranged under the iron pad 2 or under the insulating coupling pad 7.

[0148] In a preferred embodiment, the iron backing plate further comprises an opening near the spring bar seat, in which an anchor bolt 9 is installed to be fixed to the sleeper.

[0149] In a further preferred embodiment, the iron plate includes two centrally symmetrical spring bars, which are respectively installed on both sides of the rail. Figure 1 shown.

[0150] In a preferred embodiment, the iron pad, rail pad, gauge block, fast spring clip and spring clip cap are pre-installed as one in the factory, and the construction site only needs to install the fast spring clip, further insert the spring clip, clamp the two toes on the side of the spring clip seat and position and stop it through the upper and lower stop structures, buckle the bottom of the spring clip cap on the rail, and perform bolt anchoring operations, which is convenient for on-site construction and installation.

[0151] The present invention also provides a method for installing the boltless spring clip fastener as described above, the method comprising a pre-installation process of the spring clip fastener, the pre-installation process comprising the following steps:

[0152] (1) Place an iron pad, place the rail pad on it, embed the gauge block into the spring bar seat on the iron pad, support the ramp slide on the iron pad in the spring bar seat, and clamp the rail pad with the gauge block.

[0153] (2) Place the spring bar cap with a spring bar cap at the middle tip on the spring bar seat on the iron pad, so that the middle tip (middle toe) of the spring bar enters the middle channel of the spring bar seat, and the two (side) toes of the spring bar are respectively located outside the clamping parts on both sides of the spring bar seat, and push the spring bar to slide into the iron seat. Stop pushing when the raised stop on the spring bar cap passes through or enters the positioning structure on the spring bar seat.

[0154] Preferably, the pre-installation process includes:

[0155] (1-1) Put the iron plate in place: Place the iron plate on the working platform;

[0156] (1-2) Install the rail pad: Place the rail pad into the rail bearing groove of the iron pad;

[0157] (1-3) Install the gauge block: embed the gauge block into the spring bar seats on both sides of the iron pad, support the ramp slide on the iron pad in the spring bar seat, and clamp the rail pad with the protruding meshing teeth on the lower side of the gauge block;

[0158] (1-4) Install the spring cap: Put the spring cap on the middle tip (middle toe) of the spring bar;

[0159] (2) Pre-installation of spring bar lifting: Place two spring bars with spring bar caps outside the spring bar seat of the iron pad, so that the middle toe of the spring bar enters the entrance of the middle channel of the iron seat, and the two (side) toes of the spring bar are respectively located at the entrance of the slide groove on both sides outside the clamping part of the spring bar seat; push the spring bar to slide into the spring bar seat, and stop pushing when the limit protrusion stop on the spring bar cap passes through or enters the positioning structure on the spring bar seat.

[0160] In a preferred embodiment, in step (2), the pushing is stopped when the raised stopper on the upper end of the spring bar cap passes through the upper crossbeam of the spring bar seat;

[0161] In another preferred embodiment, in step (2), the pushing is stopped when the raised stops on both side ends of the spring bar cap slide into the recesses of the clamping parts on both sides of the spring bar seat.

[0162] In a more preferred embodiment, when the limiting protrusion stop on the spring bar cap passes through or enters the positioning structure on the spring bar seat, the upper parts of the two toe ends of the spring bar slide into the recesses on the upper surfaces of the clamping parts on both sides of the spring bar seat.

[0163] The installation method of the present invention further includes quickly installing the fasteners on site, specifically:

[0164] (3-1) Installation of coupling pads under iron pads: Place the coupling pads under the iron pads one by one on the rail support platform of the sleeper or track plate, so that the nail holes are aligned with the embedded sleeves on the rail support platform;

[0165] (3-2) Putting the fastener preassembly in place: Place the fastener preassemblies one by one on the rail support platform of the sleeper or track slab, so that the nail holes are aligned with the embedded sleeves on the rail support platform;

[0166] (3-3) Installation of road spikes: Place the distance adjustment cover plate, spring washer and road spikes in sequence above the anchor bolt holes of the iron plate, and tighten the road spikes to the specified torque;

[0167] (3-4) Rail installation: Place the rail on the top surface of the rail pad between the two gauge blocks of the fastener;

[0168] (3-5) Lift the spring clip into place: Lift the tail of the spring clip pre-assembled in the iron pad spring clip so that the middle tip of the spring clip slides toward the rail and finally presses against the top surface of the bottom edge of the rail; when the shallow pits at the ends of the two (side) toes of the spring clip are stuck on the protrusions on the upper surface of the clamping parts on both sides of the spring clip seat, the spring clip installation is completed.

[0169] The installation method of the present invention adopts an integrated track gauge block, so pre-installation is simple and convenient, there is no obstruction, the pre-installation positioning is stable, and the positioning structure is not easy to be worn and damaged. The fastener spring range after on-site installation is high, and the buckling and tightening of the rail is stable.

[0170] The present invention has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, the present invention may be subjected to a variety of substitutions and improvements, all of which fall within the scope of protection of the present invention.

Claims

1. A fast-installed boltless spring clip fastener, comprising an iron plate, a gauge block, a fast spring clip and a spring clip cap, wherein a spring clip seat is arranged on the iron plate, characterized in that: The spring bar seat has a front beam with an engaging recess and an upper cross beam connecting the clamping parts on both sides. The gauge block has a slope slide that can pass through the front beam of the spring clip seat and is supported on the iron pad inside the spring clip seat, so that the pre-installed fast spring clip is kept on the slope slide and a non-misaligned slideway is provided for the installation of the fast spring clip. The gauge block is configured to engage with the front beam of the spring bar seat through an upper connecting beam with reinforcing ribs. A raised stop is provided on the upper end or both sides of the spring bar cap, which cooperates with the cross beam on the spring bar seat or the recessed clamping parts on both sides to position it during pre-installation.

2. The quick-install boltless spring clip fastener according to claim 1, characterized in that: The gauge block is made of nylon. The slope surface on the ramp slide of the gauge block decreases toward the outer side of the rail, and the slope surface is connected to the top surface of the connecting beam on the gauge block through a smooth transition surface. A through opening is provided at the bottom of the slope slide.

3. The quick-install boltless spring clip fastener according to claim 1, characterized in that: The quick-install boltless spring clip fastener also includes a rail pad with meshing teeth on the edge. The track gauge block has lower meshing teeth which cooperate with the edge meshing teeth of the rail pad.

4. The quick-install boltless spring clip fastener according to claim 1, characterized in that: The lower surface of the clamping part on both sides of the spring bar seat is set to slowly decrease from the front end to the rear end and then rise sharply to form a concave stop structure. The front edge of the spring clip seat is straight, and the inner side of the track block near the rail is straight. When the track block and the spring clip seat are meshed, the front edge of the spring clip seat is in close contact with the inner side of the track block near the rail. Preferably, the inner wall of the clamping part on both sides of the spring bar seat is provided with a depression, and also provided with a slideway for the raised stoppers on both sides of the spring bar cap to slide, and the depression is located in the slideway. Preferably, recesses are provided on the upper surfaces of the clamping parts on both sides of the spring bar seat to position the upper part of the spring bar toe end during pre-installation.

5. The quick-install boltless spring clip fastener according to claim 1, characterized in that: The iron pad includes two centrally symmetrical spring bars, which are installed on both sides of the rail. The iron pad also includes an opening near the spring bar seat, in which an anchor bolt is installed to fix it on the sleeper.

6. The quick-install boltless spring clip fastener according to claim 1, characterized in that: The spring cap is made of nylon. The front side of the raised stopper at the upper end of the spring cap is an arc-shaped gentle slope, and the rear side is an inclined steep slope, or The front side of the raised baffles on both sides of the spring bar cap is a gentle straight slope surface, and the rear side is an arc-shaped steep slope surface. The raised baffles also have straight sides, which are respectively connected to the front side and the rear side. The lower edge of the bottom of the spring cap is a sloped surface with a certain width, and the slope of the sloped surface is consistent with the slope of the rail surface at the buckling position.

7. The quick-install boltless spring clip fastener according to claim 1, characterized in that: The lower edge of the bottom of the spring bar cap is provided with a friction-reducing protective layer, and the protective layer is a smooth metal or a high-strength, low-friction-coefficient polymer material layer.

8. The quick-install boltless spring clip fastener according to claim 1, characterized in that: It also includes an insulating coupling pad, which is arranged under the iron pad.

9. The quick-install boltless spring clip fastener according to claim 8, characterized in that: It also includes a plate height adjustment pad under the plate, which is arranged between the iron pad and the insulating coupling pad, or under the insulating coupling pad.

10. A method for quickly installing a boltless spring clip fastener, the method comprising a pre-installation process of the spring clip fastener, the pre-installation process comprising the following steps: (1) Place an iron pad, place the rail pad on it, embed the gauge block into the spring bar seat on the iron pad, support the ramp slide on the iron pad in the spring bar seat, and clamp the rail pad with the gauge block. (2) Place the spring bar cap with a spring bar cap at the middle tip on the spring bar seat on the iron pad, so that the middle tip (middle toe) of the spring bar enters the middle channel of the spring bar seat, and the toes on both sides of the spring bar are respectively located outside the clamping parts on both sides of the spring bar seat, and push the spring bar to slide into the iron seat. Stop pushing when the raised stop on the spring bar cap passes through or enters the positioning structure on the spring bar seat.

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