A fastener base plate for a tram

Abstract

This invention relates to the field of tram technology, specifically to a fastener base plate for trams, comprising a fixing seat, a pad, and a rail. The pad is mounted on the top of the fixing seat, and the rail is mounted on the pad. It also includes a clamping mechanism mounted on the pad and located on both sides of the rail. The clamping mechanism moves the pressure plate outward by rotating a screw, causing the moving pressure plate to press tightly against the rail. Simultaneously, the rotating screw drives a shaft to rotate, driving an elastic steel bar to press the pressure plate and transmit pressure to the rail. This invention solves the problem that existing tram fastener base plates require multiple parts to be installed layer by layer on concrete sleepers, resulting in a cumbersome installation process, numerous parts, long installation time, and low efficiency. This invention allows for the simultaneous installation of all parts, simplifying the installation process, saving installation time, and improving installation efficiency.

Description

Technical Field

[0001] This invention relates to the field of tram technology, and more specifically to a fastener base plate for trams. Background Technology

[0002] The rail fastener base plate is a key component of the tram track system, primarily responsible for connecting and stabilizing the track. The rail fastener, in turn, is a crucial component connecting the rails to the concrete sleepers, playing a vital role in insulation, rail fixation, and maintaining track geometry. As a key component of the rail fastener, the base plate forms the foundation of the fastener system, playing a vital role in supporting the fastener components. In the tram fastener system, the base plate's function is to bear the rail forces and transfer them to the underlying concrete sleepers.

[0003] The fastener base plates for trams are manually installed on both sides of the rail to secure it. The base plates are symmetrically installed on both sides of the rail at regular intervals. The bolts on the base plates are then tightened using tools to ensure rail stability. In existing tram fastener base plate installation methods, elastic shims and iron pads are typically placed on concrete sleepers. Then, gauge plates are placed on the iron pads, and shims are placed at the bottom of the steel pipes. Finally, elastic clips are placed on the gauge plates and shims, and their positions are adjusted. Finally, the rail is fixed to the concrete sleeper using spiral spikes, completing the installation of the fastener base plate. Alternatively, depending on the shape of the elastic clip, specialized tools are used to insert it between the gauge plate and the rail. However, the installation process involves installing each component layer by layer on the concrete sleeper, which is cumbersome due to the large number of parts and the long installation time, resulting in low efficiency.

[0004] In view of the above, in order to overcome the above technical problems, the present invention designs a fastener base plate for trams, which solves the above technical problems. Summary of the Invention

[0005] The technical objective of this invention is to solve the problem of installing all parts at once in existing tram fastener base plates, which simplifies the installation process, saves installation time, and improves installation efficiency.

[0006] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution: a fastener base plate for a tram, comprising a fixing seat, a pad, and a rail. The pad is mounted on the top of the fixing seat, and the rail is mounted on the pad. The invention also includes a pressing mechanism, which is mounted on the pad and located on both sides of the rail. The pressing mechanism drives a pressure plate to move horizontally toward one side of the rail and press against the rail by rotating a rotating screw. After the pressure plate is pressed against one side of the rail, it disengages from the rotating screw and stops moving horizontally. At the same time, the rotating screw drives the rotating shaft to rotate and drives the elastic steel bar to rotate at a certain angle and press against the pressure plate, thus transmitting the pressure to the rail.

[0007] When installing the fastener base plate of a tram, the installation of each part needs to be carried out in sequence, and the basic installation of the fastener is cumbersome. In order to speed up the installation, a clamping mechanism is used to quickly install the rail and shims on the fixed seat, and then the clamping mechanism quickly fixes the rail on the fixed seat, thereby realizing the rapid installation of the rail, simplifying the installation process and saving installation time.

[0008] The clamping mechanism includes a fixed box, a pressure plate, an elastic steel strip, a bolt, a rotating screw, and a rotating shaft. The fixed box is installed on top of the pad and has a trapezoidal structure. The pressure plate is installed at the bottom of the trapezoidal fixed box, and a rotating shaft is installed in the middle of the fixed box. An elastic steel strip is installed on the rotating shaft and is in contact with the pressure plate. The bolt is installed on the top outer side of the fixed box, and the length of the bolt is twice the height of the fixed box. The rotating screw is installed on the top of the fixed box and is located inside the bolt. The length of the rotating screw is 1.2 times the height of the fixed box.

[0009] To enable rapid rail installation, the fixing box is first secured to the fixing base with bolts. Then, by rotating the screws, the pressure plate is brought close to and tightly pressed against the rail. Simultaneously, the elastic steel bar contacts the pressure plate, applying significant pressure. The elastic steel bar deforms, transmitting the pressure through the pressure plate to the bottom of the rail, thus fixing it in place. This achieves rapid rail installation. The bolt length is twice the height of the fixing box to ensure its stability when firmly secured to the fixing base. The screw length is 1.2 times the height of the fixing box to allow it to rotate within the fixing box. Rotation of the screw brings the pressure plate closer to the bottom of the rail, causing the elastic steel bar to deform and press the pressure plate firmly against the rail, ensuring its stability.

[0010] Two radial grooves are respectively opened on the rotating shaft. A gear is set in the middle of the rotating shaft and the gear is located between the two grooves. Circular through holes are opened inside both ends of the rotating shaft. The circular through holes are interconnected with the grooves. A pressure block is set on the same side of the two grooves respectively. The length of the groove is 1 / 2 of the length of the pressure block.

[0011] To ensure the rotating shaft can drive the elastic steel strip to rotate as well, two slots are installed on the shaft for mounting the elastic steel strip. During installation, pressure is applied inwards to both ends of the elastic steel strip to deform it, bringing the ends closer together and allowing them to pass through the slots on the shaft. The ends of the elastic steel strip then enter the circular through-hole of the shaft. Releasing the elastic steel strip allows it to return to its original position, completing the installation. It's important to note that the pressure block on the shaft ensures that the elastic steel strip can contact the block when rotating under the shaft's influence. This provides sufficient reverse support when the elastic steel strip deforms under stress, preventing it from slipping out of the circular through-hole. The length of the slot is half the length of the pressure block to ensure maximum contact and a sufficient bearing area between the elastic steel strip and the block, thus guaranteeing stability during deformation.

[0012] The bottom of the fixed box has sliding grooves at both ends, and the top of the fixed box has a baffle. The outer ends of the baffle have two rectangular through holes, which correspond to the outer ends of the strip grooves and penetrate the top of the baffle. The width of the rectangular through holes is greater than the diameter of the elastic steel strip. The top of the baffle has a round hole, and the top of the fixed box has a through threaded hole.

[0013] To ensure the pressure plate remains horizontal during sliding, it is installed in two sliding grooves within the fixed box. The distance between the pressure plate and the bottom of the rail can be adjusted to ensure the pressure plate remains firmly against the rail, thus increasing rail stability. The rectangular through-hole on the baffle allows the elastic steel bar sufficient rotation space. The width of the rectangular through-hole is greater than the diameter of the elastic steel bar to ensure it can rotate within the through-hole. A through-hole threaded hole on the top outer side of the fixed box allows it to be stably mounted on the fixed seat with bolts, ensuring rail stability.

[0014] The rotating screw has a circular washer at the top and a spiral protrusion that meshes with a gear. The length of the spiral protrusion is 2 / 3 of the length of the rotating screw. The bottom of the rotating screw has horizontally arranged teeth.

[0015] To enable the rotating screw to move the pressure plate and elastic steel strip, a helical protrusion is provided on the rotating screw. The helical protrusion meshes with a gear, and the rotation of the rotating screw drives the gear to rotate, which in turn drives the shaft to rotate, thus moving the elastic steel strip. The rotating teeth at the bottom of the rotating screw are used to drive the pressure plate to move, ensuring that the elastic steel strip and pressure plate can move with the rotation of the rotating screw. The length of the helical protrusion is 2 / 3 of the length of the rotating screw. This is to ensure that the rotating screw does not disengage from the gear during rotation, ensuring that the rotating screw can smoothly drive the elastic steel strip to rotate.

[0016] The elastic steel strip has a "π" shaped structure. The two sides of the "π" shaped elastic steel strip are deformable arc shapes. The length of the bottom end of the "π" shaped elastic steel strip is greater than the length of the strip groove. The diameter of the "π" shaped elastic steel strip is equal to the diameter of the circular through hole.

[0017] It should be noted that the elastic steel bar is designed in a "π" shape to ensure it can be installed on the rotating shaft. The deformable arc shapes on both sides of the "π"-shaped elastic steel bar ensure that as the elastic steel bar rotates and comes into contact with the pressure plate, the arc-shaped structure on the elastic steel bar will deform, increasing the pressure. This pressure is then transmitted to the rail through the pressure plate, ensuring the stability of the rail. The length of the bottom end of the "π"-shaped elastic steel bar is greater than the length of the strip groove, and the diameter of the "π"-shaped elastic steel bar is equal to the diameter of the circular through hole. This is to allow the "π"-shaped elastic steel bar to be smoothly installed inside the rotating shaft and to be fixed to the rail through deformation, thus achieving rapid rail installation.

[0018] A rectangular pressure block is provided on the outer end of the pressure plate, and an outward-facing L-shaped plate is provided on the top of the pressure plate. Multiple arc-shaped grooves are horizontally opened on the top of the L-shaped plate, and an arc-shaped notch is opened on the inner side of the pressure plate. The width of the arc-shaped notch is greater than the diameter of the rotating teeth on the rotating screw.

[0019] To securely fix the rail to the mounting base, an L-shaped plate on the pressure plate contacts and adheres tightly to the bottom of the rail. Elastic steel bars apply pressure to the pressure plate, thus fixing the rail in place. Multiple horizontal arc-shaped grooves are formed on the top of the L-shaped plate to prevent the elastic steel bars from detaching from the top of the pressure plate when they deform after contact with the pressure plate. An arc-shaped notch is formed on the inner side of the pressure plate, allowing it to move back and forth at the bottom of the mounting box and adjust the distance between the pressure plate and the rail, ensuring a tight fit. The width of the arc-shaped notch is greater than the diameter of the teeth on the rotating screw, ensuring the screw can move the pressure plate back and forth and adjust the distance between the pressure plate and the bottom of the rail.

[0020] A push rod is provided inside one side of the arc-shaped notch of the pressure plate. The push rod is connected to the rectangular pressure block. An inclined block is provided in the middle of the push rod. A parallelogram slider is provided on one side of the inclined block. A trapezoidal block is provided at the bottom of the push rod. The inclined surface of the trapezoidal block is located inside the parallelogram slider. A compression spring is engaged at the bottom of the trapezoidal block. The inclined surfaces of the trapezoidal block and the inclined block are parallel to each other, and the inclined surfaces are inclined towards the center inside the pressure plate.

[0021] A push rod is provided on one side of the pressure plate. This is to compress the rectangular pressure block into the pressure plate after the pressure plate and rails come into contact with each other, and at the same time push the push rod to stop the pressure plate from moving. An inclined block is provided in the middle of the push rod. This is to allow the parallelogram slider to move inward into the pressure plate when the push rod moves, so that the pressure plate can stop moving after it is in close contact with the bottom of the rails. A trapezoidal block is provided at the bottom of the push rod, and a compression spring is engaged at the bottom of the trapezoidal block. This is for resetting. When the push rod resets through the elastic potential energy of the compression spring, it will push the push rod to reset through the trapezoidal block. The inclined surfaces of the trapezoidal block and the inclined block are parallel to each other, and the inclined surfaces are inclined towards the center of the pressure plate. This is to ensure that the movement of the parallelogram slider can be smoothly driven during the movement of the push rod, so that the pressure plate stops moving.

[0022] The parallelogram slider has a rack on its outer side, which meshes with the rotating teeth. Limit blocks are provided at the top and bottom of the parallelogram slider, and the sliding distance of the limit blocks is equal to the length of the protruding arc-shaped notch of the rack.

[0023] It should be noted that during the rotation of the rotating screw, the rack will drive the pressure plate to move and come into contact with the bottom of the rail. The limit blocks at the top and bottom of the parallelogram slider are designed to limit the offset of the parallelogram slider and ensure that when the push rod moves the parallelogram slider, it can drive the rack into the interior of the pressure plate, thereby disengaging the rack from the rotating teeth at the bottom of the rotating screw and stopping the pressure plate from moving. The sliding distance of the limit block is equal to the length of the protruding arc-shaped notch of the rack. This is to ensure that the gear can fully slide into the interior of the pressure plate, thereby stopping the pressure plate from moving.

[0024] The two inclined surfaces of the parallelogram slider are parallel to the inclined surfaces of the trapezoidal block and the inclined block, respectively, and the distance between the trapezoidal block and the inclined block is greater than the length of the parallelogram slider and the corresponding surface of the pivot.

[0025] To ensure the pressure plate stops moving smoothly, the two inclined surfaces of the parallelogram slider must be parallel to the inclined surfaces of the trapezoidal block and the inclined block, respectively. This allows the push rod to move the trapezoidal block and the inclined block, and through the movement of the parallelogram slider, drive the rack and disengage it from the rotating teeth, thus stopping the pressure plate. The distance between the trapezoidal block and the inclined block must be greater than the length of the parallelogram slider's corresponding surface to the rotating shaft. This is to ensure that the rack on the pressure plate can fully enter the pressure plate and completely disengage from the rotating teeth.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. The present invention has a clamping mechanism on the fixed base. Through the cooperation of the clamping mechanism and the rotating screw, the parts on the fastener are integrated with the clamping mechanism, and the fastener base plate is quickly installed on the fixed base, which simplifies the installation process of the fastener base plate, saves the installation time required, and greatly improves the installation efficiency of the fastener base plate.

[0028] 2. The present invention has an elastic steel strip on the clamping mechanism. Through the cooperation between the elastic steel strip and the rotating screw, the elastic steel strip rotates and deforms, and transmits pressure to the rail, thereby fixing the rail. This realizes the rapid installation of the fastener base plate, saving process and installation time.

[0029] 3. The present invention has a pressure plate on the clamping mechanism. The cooperation between the rotating screw and the pressure plate causes the rotating screw to drive the pressure plate to move quickly and contact the bottom of the rail. At the same time, the elastic steel strip contacts the top of the pressure plate and fixes the rail. This simplifies the installation process and time of the fastener base plate and improves the installation efficiency of the fastener base plate. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0033] Figure 2 This is a three-dimensional structural diagram of the internal structure of the clamping mechanism of the present invention;

[0034] Figure 3 This is a three-dimensional structural diagram of the rotating shaft of the present invention;

[0035] Figure 4 This is a three-dimensional structural diagram of the fixing box of the present invention;

[0036] Figure 5 This is a three-dimensional structural schematic diagram of the rotating screw of the present invention;

[0037] Figure 6 This is a three-dimensional structural schematic diagram of the elastic steel strip of the present invention;

[0038] Figure 7 This is a three-dimensional structural diagram of the pressing block of the present invention;

[0039] Figure 8 This is a three-dimensional structural diagram of the internal structure of the pressing block of the present invention;

[0040] Figure 9 The parallelogram slider of the push rod, inclined block, trapezoidal block, parallelogram slider and rack of the present invention;

[0041] Figure 10 This is a schematic diagram illustrating the working principle of the present invention.

[0042] In the diagram: 1. Fixed base; 2. Pad; 3. Clamping mechanism; 31. Fixed box; 311. Sliding groove; 312. Baffle; 313. Rectangular through hole; 314. Round hole; 315. Threaded hole; 32. Pressure plate; 321. Rectangular pressure block; 322. L-shaped plate; 323. Arc-shaped groove; 324. Arc-shaped notch; 325. Push rod; 326. Inclined block; 327. Parallelogram slider; 3271. Limiting block; 3272. Rack; 328. Trapezoidal block; 329. Compression spring; 33. Elastic steel strip; 34. Bolt; 35. Rotating screw; 351. Circular washer; 352. Spiral protrusion; 353. Rotating gear; 36. Rotating shaft; 361. Strip groove; 362. Gear; 363. Circular through hole; 364. Pressure block; 4. Rail. Detailed Implementation

[0043] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0044] like Figures 1 to 10 As shown, a fastener base plate for a tram includes a fixing seat 1, a pad 2, and a rail 4. The pad 2 is installed on the top of the fixing seat 1, and the rail 4 is installed on the pad 2. It also includes a pressing mechanism 3, which is installed on the pad 2 and located on both sides of the rail 4. The pressing mechanism 3 drives the pressure plate 32 to move horizontally towards one side of the rail 4 and presses it tightly against the rail 4 by rotating the rotating screw 35. After the pressure plate 32 is pressed tightly against one side of the rail 4, it disengages from the rotating screw 35 and stops moving horizontally. At the same time, the rotating screw 35 drives the rotating shaft 36 to rotate and drives the elastic steel bar 33 to rotate at a certain angle and press the pressure plate 32 tightly, and transmits the pressure to the rail 4.

[0045] When installing the fastener base plate of the tram, firstly, the pad 2 is installed on the fixed seat 1, then the rail 4 is placed on the pad 2 of the fixed seat 1. Subsequently, the rail 4 is quickly fixed on the fixed seat 1 by the clamping mechanism 3. This simplifies the installation process of the fastener base plate, realizes the rapid installation of the fastener base plate, saves the installation time of the fastener base plate, and improves the installation efficiency of the fastener base plate.

[0046] like Figure 2As shown, the clamping mechanism 3 includes a fixed box 31, a pressure plate 32, an elastic steel strip 33, a bolt 34, a rotating screw 35, and a rotating shaft 36. The fixed box 31 is installed on the top of the pad 2. The fixed box 31 has a trapezoidal structure. The pressure plate 32 is installed at the bottom of the trapezoidal fixed box 31. The rotating shaft 36 is installed in the middle of the fixed box 31. The elastic steel strip 33 is installed on the rotating shaft 36 and is in contact with the pressure plate 32. The bolt 34 is installed on the top outer side of the fixed box 31. The length of the bolt 34 is twice the height of the fixed box 31. The rotating screw 35 is installed on the top of the fixed box 31 and is located inside the bolt 34. The length of the rotating screw 35 is 1.2 times the height of the fixed box 31.

[0047] When installing the rail 4, firstly, place the fixing box 31 on both sides of the rail 4. Then, use a tool to rotate the bolt 34 to fix the fixing box 31 to the fixing base 1. Subsequently, rotate the rotating screw 35. Rotating the bolt 34 causes the pressure plate 32 to move to one side of the rail 4 and come into contact with the bottom of the rail 4. After the pressure plate 32 contacts the rail 4, it will stop moving. At the same time, rotating the rotating screw 35 causes the rotating shaft 36 to rotate. The rotating shaft 36 will cause the elastic steel strip 33 to rotate. The elastic steel strip 33 rotates at a certain angle and comes into contact with the top of the pressure plate 32. As the rotating shaft 36 rotates, the elastic steel strip 33 will deform and apply greater pressure to fix the rail 4, thereby ensuring the stability of the rail 4 and realizing the rapid installation of the fastener base plate, saving the installation time of the fastener base plate and improving the installation efficiency of the fastener base plate.

[0048] like Figure 3 As shown, two radially spaced slots 361 are respectively provided on the rotating shaft 36 for installing the elastic steel strip 33. A gear 362 is provided in the middle of the rotating shaft 36 for meshing with the rotating screw 35, and the gear 362 is located between the two slots 361. Circular through holes 363 are provided inside both ends of the rotating shaft 36, and the circular through holes 363 communicate with the slots 361. A pressure block 364 is provided on the same side of the two slots 361 to increase the force-bearing area of ​​the elastic steel strip 33. The length of the slot 361 is 1 / 2 of the length of the pressure block 364.

[0049] When the rotating shaft 36 rotates, it will drive the elastic steel strip 33 in the strip groove 361 on the rotating shaft 36 to rotate. The elastic steel strip will come into contact with the pressure plate 32. As the rotating shaft 36 rotates, the elastic steel strip 33 on the outside of the strip groove 361 will come into contact with the pressure plate 32 and apply a reverse support force to the elastic steel strip 33. After contacting the pressure plate 32, the elastic steel strip 33 will deform under the force, thereby pressing the pressure plate 32 tightly onto the rail 4, ensuring the stability of the rail 4, and realizing the rapid installation of the fastener base plate.

[0050] like Figure 4 As shown, the bottom of the fixed box 31 has sliding grooves 311 at both ends for sliding the pressure plate 32, while preventing the pressure plate 32 from moving upward. The top of the fixed box 31 has a baffle 312, and the outer ends of the baffle 312 have two rectangular through holes 313. The rectangular through holes 313 correspond to the outer ends of the strip groove 361 and penetrate the top of the baffle 312. The width of the rectangular through holes 313 is greater than the diameter of the elastic steel strip 33. The top of the baffle 312 has a round hole 314. The top outer side of the fixed box 31 has a through threaded hole 315 for fixing the fixed box 31 on the fixed base 1, ensuring the stability of the fixed box 31.

[0051] As the elastic steel strip 33 rotates with the rotating shaft 36, the elastic steel strip 33 will rotate through the rectangular through hole 313 on the baffle 312 from top to bottom, and the elastic steel strip 33 will come into contact with the pressure plate 32.

[0052] like Figure 5 As shown, the top of the rotating screw 35 is provided with a circular washer 351, and the rotating screw 35 is provided with a spiral protrusion 352. The spiral protrusion 352 is used to drive the elastic steel strip 33 to rotate. The spiral protrusion 352 meshes with the gear 362. The length of the spiral protrusion 352 is 2 / 3 of the length of the rotating screw 35. The bottom of the rotating screw 35 is provided with a horizontal rotating tooth 353, which is used to drive the pressure plate 32 to move.

[0053] When the rotating screw 35 rotates, the spiral protrusion 352 on the rotating screw 35 will drive the gear 362 to rotate, the gear 362 will drive the rotating shaft 36 to rotate, thereby driving the elastic steel strip 33 to rotate. The rotating teeth 353 at the bottom of the rotating screw 35 will rotate, which will drive the pressure plate 32 to move inward, so that the pressure plate 32 and the bottom of the rail 4 come into contact with each other.

[0054] like Figure 6As shown, the elastic steel strip 33 has a "π" shaped structure. The two sides of the "π" shaped elastic steel strip 33 are deformable arc shapes. The deformable arc shapes on both sides of the "π" shaped elastic steel strip 33 are used to deform when subjected to rotational force. The length of the bottom end of the "π" shaped elastic steel strip 33 is greater than the length of the strip groove 361. The diameter of the "π" shaped elastic steel strip 33 is equal to the diameter of the circular through hole 363.

[0055] As the elastic rail 4 rotates with the shaft 36, the outer end of the elastic rail 4 will come into contact with the top of the pressure plate 32 and apply pressure to the pressure plate 32. As the shaft 36 rotates, the elastic rail 4 will deform and press the pressure plate 32 tightly against the bottom of the rail 4.

[0056] like Figure 7 As shown, a rectangular pressure block 321 is provided on the outer end of the pressure plate 32. The rectangular pressure block 321 is provided on the outer end of the pressure plate 32 so that the pressure plate 32 can stop moving after it comes into contact with the bottom of the rail 4. An outward L-shaped plate 322 is provided on the top of the pressure plate 32. A plurality of arc-shaped grooves 323 are horizontally opened on the top of the L-shaped plate 322. An arc-shaped notch 324 is opened on the inner side of the pressure plate 32. The width of the arc-shaped notch 324 is greater than the diameter of the rotating tooth 353 on the rotating screw 35.

[0057] like Figure 8 As shown, a push rod 325 is provided inside one side of the arc-shaped notch 324 of the pressure plate 32. The push rod 325 is connected to the rectangular pressure block 321. A wedge block 326 is provided in the upper middle part of the push rod 325. The wedge block 326 is used to push the parallelogram slider 327. The parallelogram slider 327 is provided on one side of the wedge block 326. A trapezoidal block 328 is provided at the bottom of the push rod 325. The trapezoidal block 328 is used to push the parallelogram slider 327 to reset. The inclined surface of the trapezoidal block 328 is located inside the parallelogram slider 327. A compression spring 329 is engaged at the bottom of the trapezoidal block 328 to reset the push rod 325. The inclined surfaces of the trapezoidal block 328 and the wedge block 326 are parallel to each other, and the inclined surfaces are inclined towards the center of the pressure plate 32.

[0058] like Figure 9As shown, a rack 3272 is provided on the outer side of the parallelogram slider 327. The rack 3272 is used to drive the movement of the pressure block. The rack 3272 meshes with the rotating teeth 353. Limiting blocks 3271 are provided at the top and bottom of the parallelogram slider to limit the offset of the parallelogram slider during movement. The sliding distance of the limiting block 3271 is equal to the length of the protruding arc-shaped notch 324 of the rack 3272.

[0059] The two inclined surfaces of the parallelogram slider 327 are parallel to the inclined surfaces of the trapezoidal block 328 and the inclined block 326, respectively. This is to ensure that the parallelogram slider 327 can be pushed by the inclined block 326 and the trapezoidal block 328, and the rack 3272 can move. The distance between the trapezoidal block 328 and the inclined block 326 is greater than the length of the parallelogram slider 327 corresponding to the rotating shaft 36.

[0060] During the rotation of the rotating screw 35, the rotating teeth 353 at the bottom of the rotating screw 35 mesh with the rack 3272. As the rotating teeth 353 rotate, the pressure plate 32 will move. When the pressure plate 32 contacts the bottom of the rail 4, the rectangular pressure block 321 on the outside of the pressure plate 32 will be pressed into the interior of the pressure plate 32. The rectangular pressure block 321 will drive the push rod 325 to move inward and drive the inclined block 326 to contact the parallelogram slider 327. As the inclined block 326 moves, it will drive the parallelogram slider 327 to move inward. The limiting block 3271 on the parallelogram slider 327 will slide inside the pressure plate 32. At the same time, the compression spring 329 at the bottom of the trapezoidal block 328 on the push rod 325 will be compressed. Through the movement of the parallelogram slider 327, the rack 3272 will move inward. The rack 3272 will disengage from the rotating teeth 353 on the rotating screw 35, thereby stopping the pressure plate 32 from moving.

[0061] When the fastener is disassembled, the reverse rotation of the rotating screw 35 will cause the rotating shaft 36 to rotate in the opposite direction, thereby causing the elastic steel strip 33 to rotate upward, so that the elastic steel strip 33 is disengaged from the pressure plate 32. The pressure plate 32 will no longer be under pressure. The compression spring 329 at the bottom of the trapezoidal block 328 on the push rod 325 inside the pressure plate 32 will push the push rod 325 to move through its own elastic potential energy. The movement of the push rod 325 causes the trapezoidal block 328 to move and come into contact with the parallelogram slider 327. At the same time, it pushes the parallelogram slider 327 to move outward. The parallelogram slider 327 drives the rack 3272 to move outward, so that the rack 3272 is reset and meshes with the rotating tooth 353 at the bottom of the rotating screw 35, thereby completing the reset of the rack 3272.

[0062] The overall working process of this invention is as follows: Figure 10 As shown, when installing the fastener base plate of the tram, firstly, the pad 2 is installed on the fixed seat 1, then the rail 4 is placed on the pad 2 of the fixed seat 1, and the fixing box 31 is placed on both sides of the rail 4. Then, the fixing box 31 is fixed to the fixed seat 1 by rotating the bolt 34 with a tool. Subsequently, the rotating screw 35 is rotated with a tool. During the rotation of the rotating screw 35, the rotating teeth 353 at the bottom of the rotating screw 35 mesh with the rack 3272, which will drive the rotating teeth 353 to rotate. As the rotating teeth 353 rotate, the rotating teeth 353 drive the pressure plate 32 to move. When the pressure plate 32 contacts the bottom of the rail 4, the rectangular pressure plate on the outer side of the pressure plate 32... Block 321 will be pressed into the pressure plate 32. The rectangular pressure block 321 will drive the push rod 325 to move inward, and drive the inclined block 326 to contact the parallelogram slider 327. As the inclined block 326 moves, it will drive the parallelogram slider 327 to move inward. The limiting block 3271 on the parallelogram slider 327 will slide inside the pressure plate 32. At the same time, the compression spring 329 at the bottom of the trapezoidal block 328 on the push rod 325 will be compressed. Through the movement of the parallelogram slider 327, it will drive the rack 3272 to move inward. The rack 3272 will disengage from the rotating tooth 353 on the rotating screw 35, thereby stopping the pressure plate 32 from moving.

[0063] When the rotating screw 35 rotates, the spiral protrusion 352 on the rotating screw 35 will drive the gear 362 to rotate, which in turn will drive the rotating shaft 36 to rotate. The rotating shaft 36 will drive the elastic steel strip 33 to rotate, and the elastic steel strip 33 on the outside of the strip groove 361 will come into contact with the pressure plate 32, applying a reverse support force to the elastic steel strip 33. The elastic steel strip 33 rotates at a certain angle and comes into contact with the top of the pressure plate 32. As the rotating shaft 36 rotates, the elastic steel strip 33 will rotate through the rectangular through hole 313 on the baffle 312 from top to bottom. The elastic steel strip 33 will come into contact with the arc groove 323 on the top of the L-shaped plate 322 on the pressure plate 32. The elastic steel strip 33 will deform and apply greater pressure to fix the rail 4, thereby ensuring the stability of the rail 4, simplifying the installation process of the fastener base plate, realizing the rapid installation of the fastener base plate, saving the installation time of the fastener base plate, and improving the installation efficiency of the fastener base plate.

[0064] When the fastener is disassembled, the reverse rotation of the rotating screw 35 will cause the rotating shaft 36 to rotate in the opposite direction, thereby causing the elastic steel strip 33 to rotate upward, so that the elastic steel strip 33 is disengaged from the pressure plate 32. The pressure plate 32 will no longer be under pressure. The compression spring 329 at the bottom of the trapezoidal block 328 on the push rod 325 inside the pressure plate 32 will push the push rod 325 to move through its own elastic potential energy. The movement of the push rod 325 causes the trapezoidal block 328 to move and come into contact with the parallelogram slider 327. At the same time, it pushes the parallelogram slider 327 to move outward. The parallelogram slider 327 drives the rack 3272 to move outward, so that the rack 3272 is reset and meshes with the rotating tooth 353 at the bottom of the rotating screw 35, thereby completing the reset of the rack 3272.

[0065] Although one or more exemplary embodiments of this disclosure have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure as defined by the appended claims.

Claims

1. A fastener base plate for a tram, comprising a fixing seat, a pad, and a rail, wherein the pad is mounted on the top of the fixing seat, and the rail is mounted on the pad, characterized in that, It also includes a clamping mechanism, which is installed on the pad and located on both sides of the rail. The clamping mechanism drives the pressure plate to move horizontally towards one side of the rail and press against the rail by rotating the rotating screw. After the pressure plate is pressed against the side of the rail, it disengages from the rotating screw and stops moving horizontally. At the same time, the rotating screw drives the rotating shaft to rotate and drives the elastic steel bar to rotate at a certain angle and press against the pressure plate, and transmits the pressure to the rail. The clamping mechanism includes a fixed box, a pressure plate, an elastic steel strip, a bolt, a rotating screw, and a rotating shaft. The fixed box is installed on top of the pad. The fixed box has a trapezoidal structure. The pressure plate is installed at the bottom of the trapezoidal fixed box. A rotating shaft is installed in the middle of the fixed box. An elastic steel strip is installed on the rotating shaft. The elastic steel strip is in contact with the pressure plate. The bolt is installed on the top outer side of the fixed box. The length of the bolt is twice the height of the fixed box. The rotating screw is installed on the top of the fixed box and is located inside the bolt. The length of the rotating screw is 1.2 times the height of the fixed box. A push rod is provided inside one side of the arc-shaped notch of the pressure plate. The push rod is connected to the rectangular pressure block. An inclined block is provided in the middle of the push rod. A parallelogram slider is provided on one side of the inclined block. A trapezoidal block is provided at the bottom of the push rod. The inclined surface of the trapezoidal block is located inside the parallelogram slider. A compression spring is engaged at the bottom of the trapezoidal block. The inclined surfaces of the trapezoidal block and the inclined block are parallel to each other, and the inclined surfaces are inclined towards the center inside the pressure plate. The parallelogram slider has a rack on its outer side, which meshes with the rotating teeth. Limit blocks are provided at the top and bottom of the parallelogram slider, and the sliding distance of the limit blocks is equal to the length of the protruding arc-shaped notch of the rack.

2. The fastener base plate for trams according to claim 1, characterized in that: Two radial grooves are respectively opened on the rotating shaft. A gear is set in the middle of the rotating shaft and the gear is located between the two grooves. Circular through holes are opened inside both ends of the rotating shaft. The circular through holes are interconnected with the grooves. A pressure block is set on the same side of the two grooves respectively. The length of the groove is 1 / 2 of the length of the pressure block.

3. The fastener base plate for trams according to claim 1, characterized in that: The bottom of the fixed box has sliding grooves at both ends, and the top of the fixed box has a baffle. The outer ends of the baffle have two rectangular through holes, which correspond to the outer ends of the strip grooves and penetrate the top of the baffle. The width of the rectangular through holes is greater than the diameter of the elastic steel strip. The top of the baffle has a round hole, and the top of the fixed box has a through threaded hole.

4. The fastener base plate for a tram according to claim 1, characterized in that: The rotating screw has a circular washer at the top and a spiral protrusion that meshes with a gear. The length of the spiral protrusion is 2 / 3 of the length of the rotating screw. The bottom of the rotating screw has horizontally arranged teeth.

5. The fastener base plate for a tram according to claim 1, characterized in that: The elastic steel strip has a "π" shaped structure. The two sides of the "π" shaped elastic steel strip are deformable arc shapes. The length of the bottom end of the "π" shaped elastic steel strip is greater than the length of the strip groove. The diameter of the "π" shaped elastic steel strip is equal to the diameter of the circular through hole.

6. The fastener base plate for a tram according to claim 1, characterized in that: A rectangular pressure block is provided on the outer end of the pressure plate, and an outward-facing L-shaped plate is provided on the top of the pressure plate. Multiple arc-shaped grooves are horizontally opened on the top of the L-shaped plate, and an arc-shaped notch is opened on the inner side of the pressure plate. The width of the arc-shaped notch is greater than the diameter of the rotating teeth on the rotating screw.

7. The fastener base plate for a tram according to claim 1, characterized in that: The two inclined surfaces of the parallelogram slider are parallel to the inclined surfaces of the trapezoidal block and the inclined block, respectively, and the distance between the trapezoidal block and the inclined block is greater than the length of the parallelogram slider and the corresponding surface of the pivot.

Images