A telescopic adjustment mechanism for a small-radius I-shaped point rail

Abstract

The present invention discloses a small-radius I-shaped point rail telescopic adjustment mechanism, which relates to the technical field of rail telescopic adjustment. The mechanism comprises a base plate, a threaded rod, a guide rail support, and a fixed rail support. The front portion of the base plate is provided with a rectangular mounting groove 1, in which a sliding block is slidably connected. Sliding grooves are symmetrically provided on the left and right sides of the sliding block, in which an upward anti-rotation screw 1 is slidably inserted. Mounting grooves 2 are provided at both the front and rear ends of the mounting groove 1, in which an insert plate is slidably inserted. The front and rear sections of the threaded rod are rotatably connected to the upper portions of the front and rear insert plates. The middle section of the threaded rod is threadedly connected to the middle portion of the sliding block. The guide rail support is connected to the anti-rotation screw 1 by means of an anti-rotation nut 1. The rear portion of the base plate is symmetrically provided with mounting grooves 3, in which an upward anti-rotation screw 2 is slidably inserted. The fixed rail support is connected to the anti-rotation screw 2 by means of an anti-rotation nut 2. The present invention has the characteristics of reasonable design and convenient assembly and disassembly.

Description

Technical Field

[0001] The invention relates to the technical field of rail expansion and contraction adjustment, and in particular to a small-radius I-shaped point rail expansion and contraction adjustment mechanism. Background Art

[0002] A rail expansion regulator, also known as a temperature regulator, is a device that regulates rail expansion and contraction. It is primarily used on long-span steel girder bridges, bridgeheads, and seamless railway tracks where rail expansion and contraction must be adjusted. It balances the expansion and contraction differential between the railway line and the bridge caused by temperature fluctuations and concrete shrinkage and creep, and relieves longitudinal stress in the track caused by these forces.

[0003] In the existing technology, rail expansion and contraction adjusters interrupt rails by fitting the curves between the base and point rails without affecting the continuity of the running surface. They are mainly composed of relatively retractable point rails and base rails, guide rail supports, and fixed rail supports. In many domestic rail expansion and contraction adjusters, the heel end of the point rail is fixed, and the rest of the point rail is a free sliding area. The curved section of the base rail is driven outward by the expansion of the point rail. However, the curve radius of the fitting surface of the base rail and the point rail on such a structural expansion and contraction adjuster cannot be too small, generally more than 300m. Otherwise, if the radius is too small, the length of the fitting part between the base rail and the point rail will also be reduced, the resistance encountered by the point rail during expansion and contraction will increase, and the outward pressure on the base rail will also increase, which will not only increase the wear of the point rail, but also easily cause the base rail to be pushed outward, deformed, or even overturned. However, this will cause difficulties in some route modifications. For example, in an environment where the space for the point rail is limited, it is necessary to consider how to set up a structure that can meet the safety requirements of the rail expansion and contraction adjuster while reducing the curve radius.

[0004] Chinese patent publication number CN216074542U discloses a small-radius I-shaped point rail telescopic adjuster. While this solves the aforementioned technical problems, the guide rail supports on each base plate are not fixed in their installation positions, resulting in different sizes of the positioning plates used to position the guide rail supports. Furthermore, after installation, the positioning plates and guide rail supports must be welded together, severely restricting the construction progress. Furthermore, when applied in environments with frequent temperature fluctuations or large day-night temperature differences, the side of the guide rail support directly presses against the waist of the base rail. Frequent misalignment between the two will inevitably cause significant wear. Summary of the Invention

[0005] The object of the present invention is to provide a small-radius I-shaped point rail telescopic adjustment mechanism to solve the above-mentioned defects caused by the prior art.

[0006] A small-radius I-shaped point rail telescopic adjustment mechanism comprises a base plate, a threaded rod, a guide rail support and a fixed rail support. The front portion of the base plate is provided with a rectangular mounting groove 1, and a rectangular sliding block is slidably connected in the mounting groove 1. The left and right sides of the sliding block are symmetrically provided with "┴"-shaped sliding grooves, and an upward anti-rotation screw 1 is slidably inserted in the sliding groove. The front and rear ends of the mounting groove 1 are both provided with rectangular mounting grooves 2, and a "┴"-shaped plug-in plate is slidably inserted in the mounting groove 2. The front and rear sections of the threaded rod are rotatably connected to the upper parts of the front and rear plug-in plates, the middle section of the threaded rod is threadedly connected to the middle part of the sliding block, the front end of the threaded rod is coaxially fixed with a hexagonal prism-shaped twisting block, the guide rail support is connected to the anti-rotation screw one with the help of an anti-rotation nut one, the rear part of the base plate is symmetrically provided with a "┴"-shaped mounting groove three, and an upward anti-rotation screw two is slidably inserted in the mounting groove three, and the fixed rail support is connected to the anti-rotation screw two with the help of an anti-rotation nut two.

[0007] Preferably, the guide rail support is a "┘"-shaped structure, and a "┬"-shaped receiving groove is provided at the bottom of the guide rail support, and a "┬"-shaped clamping plate is placed on the upper side of the receiving groove, and the anti-rotation screw passes through the clamping plate and is connected to the anti-rotation nut.

[0008] Preferably, a rectangular receiving groove 2 is provided on the side surface of the guide rail support, and a plurality of guide rollers are rotatably connected in the receiving groove 2, and the side surfaces of the guide rollers abut against the waist portion of the base rail.

[0009] Preferably, a “┘”-shaped receiving groove three is provided at the corner of the guide rail support, and the rail bottom portion of the basic rail is plugged into the receiving groove three.

[0010] Preferably, the fixed rail support is a "└"-shaped structure and its side surface abuts against the waist of the pointed rail. A "└"-shaped receiving groove four is provided at the corner of the fixed rail support, and a rectangular receiving groove five is provided next to the receiving groove four. A "─"-shaped clamping plate two is placed on the upper side of the receiving groove four and the receiving groove five. The anti-rotation screw two passes through the clamping plate two and is connected to the anti-rotation nut two. The bottom of the pointed rail is plugged in the receiving groove four, and the bottom surface of the clamping plate two abuts against the bottom of the pointed rail.

[0011] Preferably, a pair of circular receiving grooves six are symmetrically provided on the side surfaces of the fixed rail support, and outward-facing anti-rotation screws three are slidably inserted into the receiving grooves six. The inner ends of the two anti-rotation screws three are fitted with anti-rotation pressure plates, and the side surfaces of the anti-rotation pressure plates abut against the waist of the point rail. The outer ends of the anti-rotation screws three are threadedly connected with anti-rotation nuts three.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. To facilitate the installation of the switch rail, first place the anti-rotation pressure plate on the inside of the switch rail. Then, insert the anti-rotation screw (3) through the anti-rotation pressure plate and the waist of the switch rail in sequence. Then, screw in and tighten the anti-rotation nut (3) so that the side of the fixed rail support contacts the waist of the switch rail. Then, insert the bottom of the switch rail into the mounting groove (4) of the fixed rail support. Then, tighten the anti-rotation nut (2) so that the bottom surface of the pressure plate (2) contacts the bottom of the switch rail.

[0014] 2. Easy installation of the base rail. By rotating the threaded rod and driving the sliding block and the guide rail support to move backward, the side of the guide roller is abutted against the waist of the base rail, and the bottom of the base rail is plugged into the receiving groove 3 of the guide rail support until the head of the base rail abuts against the head of the point rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0016] Figure 2 It is a schematic structural diagram of the present invention from a top view as a whole.

[0017] Figure 3 Schematic diagram of the structure of the base plate in the present invention.

[0018] Figure 4 and Figure 5 It is a structural schematic diagram of the guide rail support in the present invention.

[0019] Figure 6 and Figure 7 It is a structural schematic diagram of the guide rail support in the present invention.

[0020] in:

[0021] 11-base plate; 11a-installation slot one; 11b-installation slot two; 11c-installation slot three; 12-sliding block; 12a-sliding slot; 13-anti-rotation screw one; 14-insertion plate; 15-threaded rod; 16-twisting block; 17-guide rail support; 17a-receiving slot one; 17b-receiving slot two; 17c-receiving slot three; 18-pressure plate one; 19-anti-rotation nut one; 20-guide roller; 21-anti-rotation screw two; 22-fixed rail support; 22a-receiving slot four; 22b-receiving slot five; 22c-receiving slot six; 23-pressure plate two; 24-anti-rotation nut two; 25-anti-rotation screw three; 26-anti-rotation pressure plate; 27-anti-rotation nut three. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 7As shown, a small radius I-shaped point rail telescopic adjustment mechanism includes a base plate 11, a threaded rod 15, a guide rail support 17 and a fixed rail support 22. The front portion of the base plate 11 is provided with a rectangular mounting groove 11a, and a rectangular sliding block 12 is slidably connected in the mounting groove 11a. The left and right sides of the sliding block 12 are symmetrically provided with "┴"-shaped sliding grooves 12a, and an upward anti-rotation screw 13 is slidably inserted in the sliding groove 12a. The front and rear ends of the mounting groove 11a are provided with rectangular mounting grooves 2 11b, and a "┴"-shaped plug-in is slidably inserted in the mounting groove 11b. Plate 14, the front and rear sections of the threaded rod 15 are rotatably connected to the upper parts of the front and rear plug-in plates 14, the middle section of the threaded rod 15 is threadedly connected to the middle part of the sliding block 12, and the front end of the threaded rod 15 is coaxially fixed with a hexagonal prism-shaped twisting block 16, the guide rail support 17 is connected to the anti-rotation screw 13 with the help of an anti-rotation nut 19, the rear part of the base plate 11 is symmetrically provided with a "┴"-shaped mounting groove three 11c, and an upward anti-rotation screw two 21 is slidably inserted in the mounting groove three 11c, and the fixed rail support 22 is connected to the anti-rotation screw two 21 with the help of an anti-rotation nut two 24.

[0024] In this embodiment, the guide rail support 17 is a "┘"-shaped structure, and a "┬"-shaped receiving groove 17a is provided at the bottom of the guide rail support 17, and a "┬"-shaped clamping plate 18 is placed on the upper side of the receiving groove 17a, and the anti-rotation screw 13 passes through the clamping plate 18 and is connected to the anti-rotation nut 19.

[0025] In this embodiment, a rectangular receiving groove 17b is provided on the side of the guide rail support 17, and a plurality of guide rollers 20 are rotatably connected in the receiving groove 17b. The side surfaces of the guide rollers 20 abut against the waist of the base rail.

[0026] In this embodiment, a “┘”-shaped receiving groove 3 17 c is provided at a corner of the guide rail support 17 , and the bottom portion of the basic rail is plugged into the receiving groove 3 17 c.

[0027] In this embodiment, the fixed rail support 22 is a "└"-shaped structure and its side surface abuts against the waist of the pointed rail. A "└"-shaped receiving groove four 22a is provided at the corner of the fixed rail support 22, and a rectangular receiving groove five 22b is provided next to the receiving groove four 22a. A "─"-shaped clamping plate two 23 is placed on the upper side of the receiving groove four 22a and the receiving groove five 22b. The anti-rotation screw two 21 passes through the clamping plate two 23 and is connected to the anti-rotation nut two 24. The bottom part of the pointed rail is plugged in the receiving groove four 22a, and the bottom surface of the clamping plate two 23 abuts against the bottom part of the pointed rail.

[0028] In this embodiment, a pair of circular receiving grooves six 22c are symmetrically provided on the side surfaces of the fixed rail support 22, and outward-facing anti-rotation screws three 25 are slidably inserted into the receiving grooves six 22c. The inner ends of the two anti-rotation screws three 25 are fitted with anti-rotation pressure plates 26, and the side surfaces of the anti-rotation pressure plates 26 abut against the waist of the point rail. The outer ends of the anti-rotation screws three 25 are threadedly connected with anti-rotation nuts three 27.

[0029] The practical application of this small radius I-shaped point rail telescopic adjustment mechanism includes the following installation process:

[0030] Step 1: Fix the base plate 11 to the upper side of the sleeper;

[0031] Step 2: Loosen the anti-rotation nut 19 to lift the guide rail support 17 upward, then rotate the threaded rod 15 to drive the sliding block 12 and the guide rail support 17 to move forward;

[0032] Step 3: Loosen the second anti-rotation nut 24 to allow the fixed rail support 22 to be lifted upward, then unscrew the third anti-rotation nut 27 and remove the third anti-rotation screw 25 and the anti-rotation pressure plate 26;

[0033] Step 4: Lay both the stock rail and the point rail on the upper side of the base plate 11, with the stock rail located behind the point rail;

[0034] Step 5: Place the anti-rotation pressure plate 26 on the inside of the switch rail. Then, insert the anti-rotation screw 3 25 through the anti-rotation pressure plate 26 and the waist of the switch rail. Then, screw in and tighten the anti-rotation nut 3 27 until the side of the fixed rail support 22 abuts the waist of the switch rail. Then, insert the bottom of the switch rail into the receiving groove 4 22a of the fixed rail support 22. Then, tighten the anti-rotation nut 24 24 until the bottom of the pressure plate 23 abuts the bottom of the switch rail.

[0035] Step 6: Rotate the threaded rod 15 and drive the sliding block 12 and the guide rail support 17 to move backward, so that the side of the guide roller 20 abuts against the waist of the basic rail, and the bottom of the basic rail is plugged into the receiving groove 3 17c of the guide rail support 17 until the head of the basic rail abuts against the head of the point rail.

[0036] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A small radius I-shaped point rail telescopic adjustment mechanism, characterized by: The invention comprises a base plate (11), a threaded rod (15), a guide rail support (17) and a fixed rail support (22), wherein the front portion of the base plate (11) is provided with a rectangular mounting groove (11a), and a rectangular sliding block (12) is slidably connected in the mounting groove (11a), and the left and right sides of the sliding block (12) are symmetrically provided with "┴"-shaped sliding grooves (12a), and an upward anti-rotation screw (13) is slidably inserted in the sliding groove (12a), and the front and rear ends of the mounting groove (11a) are provided with rectangular mounting grooves (11b), and a "┴"-shaped plug-in plate (14) is slidably inserted in the mounting groove (11b), and the threaded rod ( The front and rear sections of the threaded rod (15) are rotatably connected to the upper parts of the front and rear plug-in plates (14), the middle section of the threaded rod (15) is threadedly connected to the middle part of the sliding block (12), the front end of the threaded rod (15) is coaxially fixed with a hexagonal prism-shaped twisting block (16), the guide rail support (17) is connected to the anti-rotation screw one (13) by means of an anti-rotation nut one (19), the rear part of the base plate (11) is symmetrically provided with a "┴"-shaped mounting groove three (11c), and an upward anti-rotation screw two (21) is slidably inserted in the mounting groove three (11c), and the fixed rail support (22) is connected to the anti-rotation screw two (21) by means of an anti-rotation nut two (24).

2. The small radius I-shaped point rail telescopic adjustment mechanism according to claim 1, characterized in that: The guide rail support (17) is a "┘"-shaped structure. A "┬"-shaped receiving groove (17a) is provided at the bottom of the guide rail support (17), and a "┬"-shaped pressing plate (18) is placed on the upper side of the receiving groove (17a). The anti-rotation screw (13) passes through the pressing plate (18) and is connected to the anti-rotation nut (19).

3. The small radius I-shaped point rail telescopic adjustment mechanism according to claim 2, characterized in that: A rectangular receiving groove 2 (17b) is provided on the side of the guide rail support (17), and a plurality of guide rollers (20) are rotatably connected in the receiving groove 2 (17b), and the side surfaces of the guide rollers (20) abut against the waist of the base rail.

4. The small-radius I-shaped point rail telescopic adjustment mechanism according to claim 2, characterized in that: A "┘"-shaped receiving groove three (17c) is provided at a corner of the guide rail support (17), and the rail bottom portion of the basic rail is plugged into the receiving groove three (17c).

5. The small radius I-shaped point rail telescopic adjustment mechanism according to claim 1, characterized in that: The fixed rail support (22) is a "└"-shaped structure and its side surface abuts against the waist of the pointed rail. A "└"-shaped receiving groove four (22a) is provided at the corner of the fixed rail support (22), and a rectangular receiving groove five (22b) is provided next to the receiving groove four (22a). A "─"-shaped clamping plate two (23) is placed on the upper side of the receiving groove four (22a) and the receiving groove five (22b). The anti-rotation screw two (21) passes through the clamping plate two (23) and is connected to the anti-rotation nut two (24). The bottom of the pointed rail is plugged into the receiving groove four (22a), and the bottom surface of the clamping plate two (23) abuts against the bottom of the pointed rail.

6. The small-radius I-shaped point rail telescopic adjustment mechanism according to claim 5, characterized in that: A pair of circular receiving grooves (22c) are symmetrically provided on the side of the fixed rail support (22), and an outward-facing anti-rotation screw (25) is slidably inserted into the receiving groove (22c). The inner ends of the two anti-rotation screws (25) are fitted with an anti-rotation pressure plate (26). The side of the anti-rotation pressure plate (26) abuts against the waist of the pointed rail. The outer ends of the anti-rotation screws (25) are threadedly connected with an anti-rotation nut (27).

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