A swing type rack track switch end structure

Abstract

A swing rack switch heel end structure includes a swing rack, a base plate, and a rotating seat. The upper end of the base plate is provided with a circular groove, and the center of the circular groove is provided with a threaded hole. The upper end of the rotating seat is provided with a first limiting groove, and the lower end has a circular boss adapted to the circular groove, and the center of the circular boss is provided with a cylindrical hole. The rotating seat is arranged on the base plate, and the circular boss is inserted into the circular groove with a small gap, and is threadedly connected to the threaded hole by a bolt pin passing through the cylindrical hole, so that the rotating seat is rotatably connected to the base plate. The lower part of the heel end of the swing rack is clamped in the first limiting groove, and a first bolt pair is passed through the rotating seat and the swing rack to fix the heel end of the swing rack in the first limiting groove. The swing rack heel end of the present invention adopts a pivot rotation structure, which not only simplifies the structure and improves reliability, but also facilitates installation.

Description

Technical Field

[0001] The invention belongs to the technical field of rack rail switches, and in particular relates to a swing type rack rail switch heel end structure. Background Art

[0002] The closest prior art to the present invention is the utility model patent for "A Movable Rack Installation Device for a Rack Switch Area (CN212925624 U)." The movable rack heel portion utilizes a linear bearing structure. This structure has numerous parts and requires high assembly. Furthermore, the joint between the movable rack and the fixed rack lacks a mutual limiter, which can easily lead to misalignment of the front and rear rack joints, hindering the smooth meshing of the train's gears and racks. Furthermore, the movable rack heel portion of this structure is elevated to accommodate the linear bearing, placing high demands on the raw material dimensions and hindering cost control. Summary of the Invention

[0003] The present invention provides a swing type rack track switch heel end structure to overcome the deficiencies of the prior art.

[0004] The technical solution adopted by the present invention is: a swing type rack switch heel end structure, including a swing rack, a base plate and a rotating seat, the upper end of the base plate is provided with a circular groove, and the center of the circular groove is provided with a threaded hole, the upper end of the rotating seat is provided with a first limiting groove along the line direction, the lower end of the rotating seat has a circular boss adapted to the circular groove, and the center of the circular boss is provided with a cylindrical hole that passes through the limiting groove; the rotating seat is arranged on the base plate, and the circular boss is inserted in the circular groove with a small gap, and is threadedly connected to the threaded hole through a bolt pin passing through the cylindrical hole, so that the rotating seat is rotatably connected to the base plate; the lower part of the heel end of the swing rack is clamped in the first limiting groove, and the first bolt pair passes through the rotating seat and the swing rack to fix the heel end of the swing rack in the first limiting groove.

[0005] Preferably, the upper end of the cylindrical hole has a recessed groove, and the bolt head of the bolt pin is sunk in the circular recessed groove.

[0006] Furthermore, a limit seat is fixed on the base plate, and the upper end of the limit seat is provided with a second limit groove with the same width and depth as the first limit groove along the line direction, and when the swing rack is in a closed state, the center line of the second limit groove basically coincides with the center line of the first limit groove; a fixed rack is clamped in the second limit groove, and the end of the fixed rack and the end of the swing rack are docked together through a small gap between the concave and convex arc surfaces, and the adjacent tooth pitch of the fixed rack and the swing rack is the same as the normal tooth pitch.

[0007] Preferably, the end of the limiting seat and the end of the rotating seat are also butted together through a small gap between the concave and convex arc surfaces.

[0008] Furthermore, L-shaped clamps are symmetrically arranged on both sides of the limit seat, the bottom of the L-shaped clamp is fixedly connected to the base plate by a second bolt pair, and the vertical part of the L-shaped clamp passes through the vertical part, the limit seat and the fixed rack by a third bolt pair to clamp the limit seat on the base plate.

[0009] Preferably, the butt ends of the limiting seat and the fixed rack are concave arc surfaces with the same curvature, and the butt ends of the rotating seat and the swing rack are convex arc surfaces with the same curvature, and the convex arc surfaces are arranged concentrically with the circular boss.

[0010] Furthermore, the diameter of the circular boss is smaller than the diameter of the circular groove, and the height of the circular boss is smaller than the depth of the circular groove.

[0011] Preferably, the diameter of the circular boss is 1-3 mm smaller than the diameter of the circular groove, and the height of the circular boss is 1-3 mm smaller than the depth of the circular groove.

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

[0013] 1. The heel end of the swing rack of the present invention adopts a pivot rotation structure, which not only simplifies the structure and improves reliability, but also facilitates installation.

[0014] 2. The heel end of the swing rack of the present invention adopts a mounting groove structure, which has no special requirements on the size of the raw material of the rack, and is conducive to cost control.

[0015] 3. The fixed rack at the rear end and the swing rack at the front end of the present invention both adopt a mounting groove structure to limit the displacement of the fixed rack and the swing rack at the joint, and the joint part adopts a small gap fit of a concave and convex arc surface to achieve the continuity of the rack at the joint, and can effectively prevent the joint part from misalignment and abnormal tooth pitch after the rack is closed, ensuring the smooth meshing and operation of the gears and racks on the train.

[0016] 4. The docking portion of the rotating seat for mounting the swing rack and the limiting seat for mounting the fixed rack of the present invention also adopts a small gap fit between the concave and convex arc surfaces, further ensuring that the swing rack and the fixed rack dock accurately and continuously after the rack is closed, and the tooth pitch is normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention without the rack rail installed;

[0019] Figure 3 This is a cross-sectional view of the heel-end mounting structure of the swing rack of the present invention;

[0020] Figure 4This is a structural front view of the rotating seat of the present invention;

[0021] Figure 5 It is a top view of the structure of the rotating seat of the present invention. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-5 The present invention is described in detail with specific embodiments.

[0023] The cam 2 is provided with a first locking plate 21 and a second locking plate 22, and the cam 2 is provided with a first locking plate 21 and a second locking plate 23. The cam 2 is provided with a first locking plate 21 and a second locking plate 23, the cam 2 is provided with a second locking plate 23 and a second locking plate 23.

[0024] In order to prevent the bottom surface of the swing rack 1 from contacting the bolt pin 4 during the rotation of the rotating base 2, thereby affecting the flexibility of the rotating base 2, the upper end of the cylindrical hole 2-3 has a recess 2-4, and the bolt head of the bolt pin 4 is sunk in the circular recess 2-4.

[0025] The sink groove 2-4 is preferably a circular structure, and the bolt pin 4 is preferably a hexagonal cylindrical head bolt pin, and during installation, a gap of 2-3 mm is maintained between the lower end surface of the hexagonal cylindrical head and the bottom surface of the sink groove 2-4 to further ensure the flexibility of rotation of the rotating seat 2.

[0026] In order to prevent the teeth from being misaligned and the tooth pitch being abnormal at the docking part after the rack rail is closed, and to ensure the smooth meshing and operation of the gears and rack rails on the train, a limit seat 6 is also fixed on the base plate 3. The upper end of the limit seat 6 is provided with a second limit slot 6-1 with the same width and depth as the first limit slot 2-1 along the line direction, and when the swing rack rail 1 is in the closed state, the center line of the second limit slot 6-1 and the first limit slot 2-1 basically coincide with each other; a fixed rack rail 8 is clamped in the second limit slot 6-1, and the end of the fixed rack rail 8 and the end of the swing rack rail 1 are docked together through a small gap between the concave and convex arc surfaces, and the adjacent tooth pitch between the fixed rack rail 8 and the swing rack rail 1 is the same as the normal tooth pitch. The above structure limits the displacement of the docking part between the fixed rack rail and the swing rack rail, and the joint part adopts a small gap between the concave and convex arc surfaces to achieve the continuity of the rack rail at the docking part, which can effectively prevent the teeth from being misaligned and the tooth pitch being abnormal at the docking part after the rack rail is closed, and ensure the smooth meshing and operation of the gears and rack rails on the train.

[0027] In order to further ensure that the swing rack and the fixed rack are docked accurately and continuously after the rack is closed, and the pitch is normal, the end of the limit seat 6 and the end of the rotating seat 2 are also docked together through a small gap between the concave and convex arc surfaces.

[0028] In one embodiment, L-shaped clamps 9 are symmetrically provided on both sides of the limit seat 6, the bottom of the L-shaped clamp 9 is fixedly connected to the base plate 3 by a second bolt pair 10, and the vertical part of the L-shaped clamp 9 passes through the vertical part, the limit seat 6 and the fixed rack 8 by a third bolt pair 11 to clamp the limit seat 6 on the base plate 3.

[0029] In a preferred embodiment, the butt joint ends of the limit seat 6 and the fixed rack 8 are concave arc surfaces with the same curvature, and the butt joint ends of the rotating seat 2 and the swinging rack 1 are convex arc surfaces with the same curvature, and the convex arc surfaces are arranged concentrically with the circular boss 2-2. The diameter of the circular boss 2-2 is smaller than the diameter of the circular groove 3-1, and the height of the circular boss 2-2 is smaller than the depth of the circular groove 3-1, so as to ensure that the bottom end of the circular boss 2-2 does not contact the bottom surface of the circular groove 3-1 after installation, thereby reducing the rotational friction of the rotating seat 2 and improving the rotational flexibility. In the above structure, preferably, the diameter of the circular boss 2-2 is 2 mm smaller than the diameter of the circular groove 3-1, and the height of the circular boss 2-2 is 2 mm smaller than the depth of the circular groove 3-1.

[0030] In a specific application of the present invention, the base plate 3 is welded and fixed on the switch tie. When the switch machine drives the swing rack 1 to swing, its heel end and the rotating seat 2 rotate together with the bolt pin 4 as the pivot, through the clearance fit between the circular boss 2-2 at the bottom of the rotating seat 2 and the circular groove 3-1 on the base plate 3, to complete the closing or separation of the swing rack 1 and realize the switching of the rack switch.

[0031] 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 swing type rack track switch end structure, characterized by: The invention comprises a swing rack (1), a base plate (3) and a rotating seat (2); the upper end of the base plate (3) is provided with a circular groove (3-1), and the center of the circular groove (3-1) is provided with a threaded hole (3-2); the upper end of the rotating seat (2) is provided with a first limiting groove (2-1) along the line direction; the lower end of the rotating seat (2) is provided with a circular boss (2-2) adapted to the circular groove (3-1); the center of the circular boss (2-2) is provided with a cylindrical hole (2-3) penetrating with the first limiting groove (2-1); the rotating seat (2) is provided with a cylindrical hole (2-3) penetrating with the first limiting groove (2-1); The seat (2) is arranged on the base plate (3), and the circular boss (2-2) is inserted into the circular groove (3-1) with a small gap, and is threadedly connected to the threaded hole (3-2) through a bolt pin (4) passing through the cylindrical hole (2-3), so as to rotatably connect the rotating seat (2) to the base plate (3); the lower part of the heel end of the swing rack (1) is clamped in the first limiting groove (2-1), and the heel end of the swing rack (1) is fixed in the first limiting groove (2-1) through a first bolt pair (5) passing through the rotating seat (2) and the swing rack (1); A limiting seat (6) is also fixed on the bottom plate (3), and a second limiting groove (6-1) having the same width and depth as the first limiting groove (2-1) is provided at the upper end of the limiting seat (6) along the line direction, and when the swing rack (1) is in a closed state, the center line of the second limiting groove (6-1) and the center line of the first limiting groove (2-1) are basically coincident; a fixed rack (8) is clamped in the second limiting groove (6-1), and the end of the fixed rack (8) and the end of the swing rack (1) are butted together through a small gap between the concave and convex arc surfaces, and the adjacent tooth pitches of the fixed rack (8) and the swing rack (1) are the same as the normal tooth pitch; the end of the limiting seat (6) and the end of the rotating seat (2) are also butted together through a small gap between the concave and convex arc surfaces.

2. The swing type rack track switch heel end structure according to claim 1, characterized in that: The upper end of the cylindrical hole (2-3) is provided with a circular recessed groove (2-4), and the bolt head of the bolt pin (4) is sunk in the circular recessed groove (2-4).

3. The swing type rack track switch heel end structure according to claim 2, characterized in that: L-shaped clamping plates (9) are symmetrically arranged on both sides of the limit seat (6); the bottom of the L-shaped clamping plate (9) is fixedly connected to the base plate (3) via a second bolt pair (10); the vertical portion of the L-shaped clamping plate (9) passes through the vertical portion, the limit seat (6) and the fixed rack (8) via a third bolt pair (11) to clamp and fix the limit seat (6) on the base plate (3).

4. The swing type rack track switch heel end structure according to claim 3, characterized in that: The butt joint ends of the limiting seat (6) and the fixed rack (8) are concave arc surfaces with the same curvature, and the butt joint ends of the rotating seat (2) and the swing rack (1) are convex arc surfaces with the same curvature, and the convex arc surfaces are arranged concentrically with the circular boss (2-2).

5. The swing type rack track switch heel end structure according to claim 4, characterized in that: The diameter of the circular boss (2-2) is smaller than the diameter of the circular groove (3-1), and the height of the circular boss (2-2) is smaller than the depth of the circular groove (3-1).

6. The swing type rack track switch heel end structure according to claim 5, characterized in that: The diameter of the circular boss (2-2) is 1-3 mm smaller than the diameter of the circular groove (3-1), and the height of the circular boss (2-2) is 1-3 mm smaller than the depth of the circular groove (3-1).

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