Small-number movable point rail frog for urban rail transit

Abstract

The utility model discloses a small-number movable point rail frog for urban rail transit. The small-number movable point rail frog comprises lateral wing rails, straight wing rails, an integrated point rail, lateral fork heel rails, straight fork heel rails and pivot assemblies. The integrated point rail is of an axially symmetrical structure, is sleeved on the pivot assembly through a stepped hole formed in the heel end of the integrated point rail and can rigidly rotate; the center of the pivot assembly is located on the intersection point of the sharp angle bisector of the integrated point rail and the frog angle bisector. The heel end of the integrated point rail is in butt joint with the front ends of the lateral heel forking rail and the straight heel forking rail in a small clearance fit mode through convex-concave arc surfaces. The point rail can be universally used in left-opening and right-opening turnouts, the pulling force is reduced, insufficient displacement is avoided, the rotating center of the heel end of the point rail is located in the middle of the straight direction and the lateral direction, when the point rail is pulled by electric service conversion equipment to open the straight or lateral rail, the rotating angle is basically consistent, and the straight strand pulling force and the lateral strand pulling force are balanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway turnouts, in particular to a small-numbered movable point rail frog for urban rail transportation. Background Art

[0002] At present, large-volume, fast, safe and punctual rail transit has become the preferred public transportation to solve urban traffic congestion, and the property development behind the vehicle depot is becoming more and more popular. In the prior art, the vehicle depot mainly uses fixed turnouts with small numbers of 9 and below. The fixed frogs in the turnouts have "harmful space", which leads to large wheel-rail vibration noise and complaints from surrounding residents. The movable heart rail frog can eliminate the "harmful space", provide continuous running conditions for the train, alleviate the wheel-rail impact vibration to a large extent, and reduce noise. The existing movable heart rail frogs are mainly used for high-speed mainline railways, with rail types of 60kg / m rails and above, and the turnout numbers are mainly 12 and above; for small-number turnouts of 9 and below, because the rail type of the turnout is small, the range of heart rail type selection is limited. If a new type of short rail is developed, if the production batch is not large enough, the cost of rolling the rail is very high, and it is difficult to promote and apply it in the turnout. For this reason, it is urgent to develop a small-number movable heart rail frog for urban rail transit with high cost performance. Utility Model Content

[0003] The utility model provides a small-number movable rail turnout for urban rail transportation, so as to overcome the shortcomings of the prior art.

[0004] The technical solution adopted by the utility model is: a small-number movable heart rail frog for urban rail transportation, comprising lateral wing rails, straight wing rails, an integrated heart rail, a lateral fork follower rail, a straight fork follower rail and a pivot assembly; the integrated heart rail is an axially symmetrical structure, and its two outer sides are respectively a straight working edge and a lateral working edge, and the top surface profile matches the wheel tread;

[0005] The pivot assembly includes a pivot, a sliding bearing and an iron backing plate; the pivot is fixed on the iron backing plate, and the sliding bearing is sleeved on the pivot; the integrated heart rail is sleeved on the sliding bearing through a step hole on its heel end, and the heel end of the integrated heart rail is fixed together with the sliding bearing, so that the integrated heart rail can rigidly rotate around the pivot;

[0006] The center of the pivot is located at the intersection of the sharp angle bisector of the integrated heart rail and the frog angle bisector; the heel end of the integrated heart rail is butted with the front ends of the lateral fork heel rail and the straight fork heel rail through a convex and concave arc surface with a small gap;

[0007] When the frog is opened vertically, the lateral working edge of the integrated heart rail is in close contact with the middle of the vertical wing rail, and the straight working edge of the integrated heart rail and the working edge of the vertical fork rail are in the same angular direction; when the frog is opened laterally, the straight working edge of the integrated heart rail is in close contact with the middle of the lateral wing rail, and the lateral working edge of the integrated heart rail and the working edge of the lateral fork rail are in the same angular direction.

[0008] Furthermore, the one-piece heart rail is a cavity structure, the cavity structure is located between the rail top width ≥100mm and the step hole, and the straight working edge and lateral working edge rail top widths on both sides of the cavity section are ≥50mm.

[0009] Furthermore, the heel end of the integrated heart rail is a convex arc surface, and the front ends of the lateral fork heel rail and the straight fork heel rail are symmetrical concave arc surfaces; the convex arc surface is arranged concentrically with the concave arc surface, and the concave arc surface surrounds the convex arc surface.

[0010] Furthermore, the sliding bearing is in the form of a T-shaped cylindrical structure adapted to the step hole, and the upper cover at the top of the T-shaped cylindrical structure is fixed to the heel end of the integrated heart rail by vertically arranged bolts.

[0011] Furthermore, the front end of the integrated heart rail has an anti-jump shoulder, and an anti-jump spacer iron is provided above the anti-jump shoulder, and the anti-jump spacer iron is fixed between the lateral wing rails and the vertical wing rails; the rear end of the integrated heart rail has anti-jump stop irons symmetrically on both sides, and an anti-jump top iron is provided above the anti-jump stop iron, and the anti-jump top iron is symmetrically fixed on the lateral wing rails and the vertical wing rails.

[0012] Furthermore, a vertical limit block and a lateral limit block are respectively provided on both sides of the upper end of the iron pad. When the lateral working edge of the tip of the integrated heart rail is in close contact with the vertical wing rail, one side of the lateral working edge of the bottom heel end of the integrated heart rail abuts against the lateral limit block; when the straight working edge of the tip of the integrated heart rail is in close contact with the lateral wing rail, one side of the straight working edge of the bottom heel end of the integrated heart rail abuts against the vertical limit block.

[0013] Furthermore, the frog is provided with a connected large pad below the heel end of the integrated heart rail, the iron pad is fixed to the rear end of the connected large pad, a table is fixed in the middle of the connected large pad, and a straight double-sided buckle plate and a lateral double-sided buckle plate are fixedly installed on both sides of the table respectively; when the lateral working edge of the tip of the integrated heart rail is in close contact with the straight wing rail, the bottom of the lateral working side rail of the integrated heart rail is vertically buckled by the lower part of the lateral double-sided buckle plate, and the waist of the lateral working side rail of the integrated heart rail is abutted against the upper end of the lateral double-sided buckle plate; when the straight working edge of the tip of the integrated heart rail is in close contact with the lateral wing rail, the bottom of the straight working side rail of the integrated heart rail is vertically buckled by the lower part of the straight double-sided buckle plate, and the waist of the straight working side rail of the integrated heart rail is abutted against the upper end of the straight double-sided buckle plate.

[0014] Furthermore, the one-piece heart rail is firstly formed into a blank by forging or casting, and then manufactured by machining, or is manufactured by machining a steel billet.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The heart rail of the utility model adopts an integrated symmetrical structure, and the whole is rigidly rotated, and the rotation center is set at the intersection of the bisector of the sharp angle of the heart rail and the bisector of the frog angle. It can not only be used in left-opening and right-opening turnouts, reducing the pulling force and avoiding the generation of insufficient displacement, but also the rotation center of the heart rail heel end is in the middle position between the straight and lateral directions. When the power conversion equipment pulls the heart rail to open the straight or lateral track, the rotation angle is basically the same, which balances the pulling force of the straight and lateral stocks.

[0017] 2. The utility model greatly shortens the length of the center rail, reduces the area occupied by the turnout and the engineering cost.

[0018] 3. The utility model adopts a T-shaped structure with a high-strength brass matrix inlaid with graphite sliding bearing to ensure the reliability of the connection between the center rail and the end, smooth rotation, and reduced rotation friction.

[0019] 4. The utility model can be used in both left-hand and right-hand turnouts, avoiding the problem that conventional heart rails need to be manufactured according to left and right openings, thereby reducing the types of heart rail manufacturing and track spare parts.

[0020] 5. The utility model has high structural strength, good stability and strong resistance to lateral impact, which avoids the breakage problem of conventional long and short heart rails due to limited assembly space and more cutting of the rail head and rail bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2This is the working principle diagram of the utility model;

[0023] Figure 3 yes Figure 1 AA cross-sectional structural diagram;

[0024] Figure 4 yes Figure 1 BB cross-sectional structure diagram;

[0025] Figure 5 yes Figure 1 Schematic diagram of CC cross-section structure;

[0026] Figure 6 yes Figure 1 DD cross-sectional structure diagram;

[0027] Figure 7 This is a structural front view of the integrated center rail of the utility model;

[0028] Figure 8 It is a structural attachment view of the integrated heart rail of the utility model;

[0029] Fig. 9 It is a structural schematic diagram of the iron pad of the utility model;

[0030] Fig.10 yes Figure 1 Schematic diagram of the EE cross-section structure. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-10 The utility model is described in detail with specific implementation modes.

[0032] Reference Figure 1 , 2 4. A small-numbered movable center rail frog for urban rail transit, comprising a lateral wing rail 1, a straight wing rail 2, an integrated center rail 3, a lateral fork track rail 4, a straight fork track rail 5 and a pivot assembly; the integrated center rail 3 is an axially symmetrical structure, and its two outer sides are respectively a straight working edge and a lateral working edge, and the top surface profile matches the wheel tread;

[0033] The pivot assembly includes a pivot 6, a sliding bearing 7 and an iron backing plate 8; the pivot 6 is fixed on the iron backing plate 8, and the sliding bearing 7 is sleeved on the pivot 6; the integrated heart rail 3 is sleeved on the sliding bearing 7 through the step hole 3-1 on its heel end, and the heel end of the integrated heart rail 3 is fixed together with the sliding bearing 7, so that the integrated heart rail 3 can rigidly rotate around the pivot 6;

[0034] The center of the pivot 6 is located at the intersection of the bisector of the sharp angle β of the integrated heart rail 3 and the bisector of the frog angle α; the heel end of the integrated heart rail 3 is butted with the front ends of the lateral fork heel rail 4 and the straight fork heel rail 5 through a convex and concave arc surface with a small gap;

[0035] When switching, the electric service conversion mechanism pulls the integrated heart rail 3 at the traction point through the electric service lock hook to rigidly rotate around the pivot 6. When the frog is opened vertically, the lateral working edge of the integrated heart rail 3 is in close contact with the middle of the vertical wing rail 2, and the straight working edge of the integrated heart rail 3 and the working edge of the vertical fork rail 5 are in the same angular direction; when the frog is opened laterally, the straight working edge of the integrated heart rail 3 is in close contact with the middle of the lateral wing rail 1, and the lateral working edge of the integrated heart rail 3 and the working edge of the lateral fork rail 4 are in the same angular direction.

[0036] Reference Figure 7 , 8 In one embodiment, the integrated heart rail 3 is a cavity structure, which is located between the rail top width ≥100mm and the step hole 3-1, and the rail top widths of the straight working edges and the lateral working edges on both sides of the cavity section 3-2 are ≥50mm, and the rail waist thickness is ≥30mm, which can not only ensure that the heart rail has sufficient bearing capacity for the train, but also reduce its own weight and pulling force.

[0037] Reference Figure 1 , 2 In one embodiment, the heel end of the integrated heart rail 3 is a convex arc surface 3-3, the front end of the lateral fork heel rail 4 is a concave arc surface 4-1, and the front end of the straight fork heel rail 5 is a concave arc surface 5-1, and the concave arc surface 4-1 is symmetrically arranged with the concave arc surface 5-1. The convex arc surface 3-3 is arranged concentrically with the concave arc surface 4-1 and the concave arc surface 5-1, and after the concave arc surface 4-1 and the concave arc surface 5-1 surround the convex arc surface 3-3, the butt clearance between the straight working edge and the lateral working edge of the integrated heart rail 3 and the working edges of the lateral fork heel rail 4 and the straight fork heel rail 5 are reduced, thereby ensuring smooth wheel operation, reducing vibration, and reducing noise.

[0038] Preferably, the convex arc surface 3-3 is a semicircular arc surface, and the concave arc surface 4-1 and the concave arc surface 5-1 form a semicircular arc surface.

[0039] Reference Figure 6In one embodiment, the sliding bearing 7 is a T-shaped cylindrical structure adapted to the step hole 3-1, and the upper cover 7-1 at the top of the T-shaped cylindrical structure is fixed to the heel end of the integrated heart rail 3 by a vertically arranged bolt 9; the outer wall of the sliding bearing 7 is interference fit with the step hole 3-1, and the inner wall of the sliding bearing 7 is clearance fit with the pivot 6, so that the integrated heart rail 3 and the sliding bearing 7 become one and rotate around the pivot 6; the sliding bearing 7 adopts a high-strength brass matrix inlaid with a graphite bearing with extremely low friction to further reduce the pulling force.

[0040] Reference Figure 3 , 5 , 7, 8, in one embodiment, in order to limit the jumping of the integrated heart rail 3, the front end of the integrated heart rail 3 is provided with an anti-jumping shoulder, and an anti-jumping spacer iron 10 is provided above the anti-jumping shoulder, and a gap of 2mm to 6mm is set between the two, and the anti-jumping spacer iron 10 is fixed between the lateral wing rails 1 and the vertical wing rails 2; the rear end of the integrated heart rail 3 is symmetrically provided with anti-jumping stop irons 3-4 on both sides, and an anti-jumping top iron 11 is provided above the anti-jumping stop iron 3-4, and a gap of 2mm to 6mm is set between the two, and the anti-jumping top iron 11 is symmetrically fixed on the lateral wing rails 1 and the vertical wing rails 2.

[0041] Reference Figure 1 , 9 In one embodiment, the upper ends of the iron pad 8 are provided with lateral limit blocks 8-1 and vertical limit blocks 8-2 respectively. When the frog is opened vertically, the lateral working edge of the tip of the integrated heart rail 3 is in close contact with the vertical wing rail 2, and the lateral working edge of the bottom heel end of the integrated heart rail 3 is against the lateral limit block 8-1; when the frog is opened laterally, the vertical working edge of the tip of the integrated heart rail 3 is in close contact with the lateral wing rail 1, and the vertical working edge of the bottom heel end of the integrated heart rail 3 is against the vertical limit block 8-2. The lateral limit blocks 8-1 and the vertical limit blocks 8-2 provide limit protection for the heel end of the integrated heart rail 3, reduce the force on the pivot 6, and improve the reliability and service life of the frog.

[0042] Reference Figure 1 , 10The frog is provided with a conjoined large pad 12 below the heel end of the integrated heart rail 3, the iron pad 8 is fixed to the rear end of the conjoined large pad 12, a platform 15 is fixed in the middle of the conjoined large pad 12, and a vertical double-sided buckle plate 14 and a lateral double-sided buckle plate 13 are respectively fixedly installed on both sides of the platform 15; when the lateral working edge of the tip of the integrated heart rail 3 is in close contact with the vertical wing rail 2, the lateral working side rail bottom of the integrated heart rail 3 The lateral working side rail waist of the integrated heart rail 3 is pressed vertically by the bottom of the lateral double-sided buckle plate 13, and the upper end of the lateral double-sided buckle plate 13 is abutted; when the straight working edge of the tip of the integrated heart rail 3 is in close contact with the lateral wing rail 1, the straight working side rail bottom of the integrated heart rail is pressed vertically by the lower part of the straight double-sided buckle plate 14, and the straight working side rail waist of the integrated heart rail is abutted against the upper end of the straight double-sided buckle plate 14. The vertical jump and lateral displacement of the heel end of the integrated heart rail 3 are limited by the straight double-sided buckle plate 14 and the lateral double-sided buckle plate 13, and lateral support can be provided for the integrated heart rail 3, thereby enhancing the ability of the integrated heart rail 3 to resist lateral impact, and ensuring that after the integrated heart rail 3 is turned into place, the frog line shape meets the design requirements.

[0043] The one-piece center rail 3 is first forged with materials such as wear-resistant alloy steel, Q355, or cast with materials such as high manganese steel, cast steel, etc. to form a blank, and then manufactured by machining. The one-piece center rail 3 can also be directly manufactured by machining using a steel billet that meets the strength requirements. If necessary, the one-piece center rail 3 is heat treated after machining to improve its wear resistance.

[0044] The utility model is particularly suitable for use with small-number turnouts of No. 9 and below, has an obvious effect on alleviating wheel-rail vibration noise in urban rail transit, and is worthy of promotion.

[0045] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A small number movable point rail frog for urban rail transit, characterized in that: It includes lateral wing rails, vertical wing rails, an integrated heart rail, lateral fork rails, vertical fork rails and a pivot assembly; the integrated heart rail is an axially symmetrical structure, and its two outer sides are respectively a vertical working edge and a lateral working edge, and the top surface profile matches the wheel tread; The pivot assembly includes a pivot, a sliding bearing and an iron backing plate; the pivot is fixed on the iron backing plate, and the sliding bearing is sleeved on the pivot; the integrated heart rail is sleeved on the sliding bearing through a step hole on its heel end, and the heel end of the integrated heart rail is fixed together with the sliding bearing, so that the integrated heart rail can rigidly rotate around the pivot; The center of the pivot is located at the intersection of the tip angle bisector of the integrated heart rail and the frog angle bisector; The heel end of the integrated heart rail is butted with the front ends of the lateral fork heel rail and the straight fork heel rail through a convex and concave arc surface with a small gap; When the frog is opened vertically, the lateral working edge of the integrated heart rail is in close contact with the middle of the vertical wing rail, and the straight working edge of the integrated heart rail and the working edge of the vertical fork rail are in the same angular direction; when the frog is opened laterally, the straight working edge of the integrated heart rail is in close contact with the middle of the lateral wing rail, and the lateral working edge of the integrated heart rail and the working edge of the lateral fork rail are in the same angular direction.

2. The small-numbered movable frog for urban rail transit according to claim 1, characterized in that: The one-piece heart rail is a cavity structure, which is located between the rail top width ≥100mm and the step hole, and the rail top widths of the straight working edges and lateral working edges on both sides of the cavity section are both ≥50mm.

3. The small-numbered movable frog for urban rail transit according to claim 1 or 2, characterized in that: The heel end of the integrated heart rail is a convex arc surface, and the front ends of the lateral fork heel rail and the straight fork heel rail are symmetrical concave arc surfaces; the convex arc surface is arranged concentrically with the concave arc surface, and the concave arc surface surrounds the convex arc surface.

4. The small-numbered movable frog for urban rail transit according to claim 3, characterized in that: The sliding bearing is in the form of a T-shaped cylindrical structure adapted to the step hole, and the upper cover at the top of the T-shaped cylindrical structure is fixed to the heel end of the integrated heart rail by vertically arranged bolts.

5. The small-numbered movable frog for urban rail transit according to claim 4, characterized in that: The front end of the integrated heart rail is provided with an anti-jumping shoulder, and an anti-jumping spacer iron is provided above the anti-jumping shoulder, and the anti-jumping spacer iron is fixed between the lateral wing rails and the vertical wing rails; the rear end of the integrated heart rail is symmetrically provided with anti-jumping stop irons on both sides, and an anti-jumping top iron is provided above the anti-jumping stop iron, and the anti-jumping top iron is symmetrically fixed on the lateral wing rails and the vertical wing rails.

6. The small-numbered movable frog for urban rail transit according to claim 5, characterized in that: A vertical limit block and a lateral limit block are respectively provided on both sides of the upper end of the iron pad. When the lateral working edge of the tip of the integrated heart rail is in close contact with the vertical wing rail, one side of the lateral working edge of the bottom heel end of the integrated heart rail abuts against the lateral limit block; when the vertical working edge of the tip of the integrated heart rail is in close contact with the lateral wing rail, one side of the vertical working edge of the bottom heel end of the integrated heart rail abuts against the vertical limit block.

7. The small-numbered movable frog for urban rail transit according to claim 6, characterized in that: The frog is provided with a connected large pad below the heel end of the integrated heart rail, the iron pad is fixed to the rear end of the connected large pad, a table is fixed in the middle of the connected large pad, and a straight double-sided buckle plate and a lateral double-sided buckle plate are fixedly installed on both sides of the table respectively; when the lateral working edge of the tip of the integrated heart rail is in close contact with the straight wing rail, the bottom of the lateral working side rail of the integrated heart rail is vertically buckled by the lower part of the lateral double-sided buckle plate, and the waist of the lateral working side rail of the integrated heart rail is against the upper end of the lateral double-sided buckle plate; when the straight working edge of the tip of the integrated heart rail is in close contact with the lateral wing rail, the bottom of the straight working side rail of the integrated heart rail is vertically buckled by the lower part of the straight double-sided buckle plate, and the waist of the straight working side rail of the integrated heart rail is against the upper end of the straight double-sided buckle plate.

8. The small-numbered movable frog for urban rail transit according to claim 7, characterized in that: The one-piece heart rail is firstly forged or cast to form a blank, and then manufactured by a machining process.

9. The small-numbered movable frog for urban rail transit according to claim 7, characterized in that: The one-piece heart rail is directly manufactured from a steel billet through a machining process.

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