Locking pin anti-rotation device

Abstract

The utility model relates to a lock pin anti-rotation device which can simplify the structure, reduce the number of parts, reduce the manufacturing cost and reduce the occupied space of a mechanism while achieving the aim of preventing a lock pin from rotating at a medium-low speed magnetic levitation turnout, a pi-shaped guide groove is formed in a turnout beam bottom plate, one end of a connecting rod is located in the pi-shaped guide groove through a bearing, and the other end of the connecting rod is located in the pi-shaped guide groove. The other end of the connecting rod is connected with the lock pin. The anti-rotation lock pin has the advantages that the lock pin is prevented from rotating, the structure is simplified, the number of parts is reduced, and the occupied space is smaller; secondly, the anti-rotation purpose of the lock pin is realized by only using the combination of one connecting rod and the bearing and one pi-shaped guide groove, and compared with the background technology, the structure is greatly simplified, the number of parts is greatly reduced, and the overall occupied space of the anti-rotation device is further reduced; and thirdly, the production and manufacturing cost is lower, the pi-shaped guide groove is made of common steel, and the bearing is a standard rolling bearing, so that a large amount of self-lubricating high-strength brass materials are saved, and the manufacturing cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a lock pin anti-rotation device for a medium and low speed magnetic levitation turnout which can achieve the goal of lock pin anti-rotation while simplifying the structure, reducing the number of parts and components, lowering the manufacturing cost and reducing the space occupied by the mechanism. Background Art

[0002] As an important system equipment of medium and low speed maglev rail transit, the safety and smoothness of the operation of medium and low speed maglev turnouts are crucial to the normal operation of the entire line. After the existing medium and low speed maglev turnouts are switched into place, they are positioned and locked by a set of linear motion electric push rods-locking pin mechanisms; in order to control the moving position of the locking pin, a limit switch bumper is installed on the locking pin rod; the limit switch bumper contacts and presses the limit switch as the locking pin moves, and the limit switch arm sends a control signal to the control cabinet after the action of the limit switch arm, and the turnout control cabinet controls the locking pin drive motor to stop. Because the electric push rod itself cannot effectively prevent the locking pin from rotating along its center axis, when the locking pin rotates, the limit switch bumper installed on the locking pin will deviate from the limit switch, causing the locking pin positioning function to fail. On this basis, someone designed the "medium and low speed maglev turnout lock pin anti-rotation device" as shown in the figure below (see Figure 5 ): The upper and lower clamping plates (4, 6) are fixed to the locking pin (8) by bolts; sleeves (5) and connecting rods (7) are installed at both ends of the upper and lower clamping plates, one end of the connecting rod is fixed by a universal nut, and the other end of the connecting rod is fixedly connected to the slider (3) by a nut; the slider is stuck in the rectangular groove between the left and right high-strength brass self-lubricating wear-reducing plates (1, 2); the four high-strength brass self-lubricating wear-reducing plates (1, 2) are fixed to the bottom plate (9) of the turnout beam by bolts. When the locking pin (8) moves linearly, the sliders at both ends are driven by the clamping plates and the connecting rod to slide in the rectangular groove between the self-lubricating wear-reducing plates (1, 2). Since the two sliders are restricted from moving downward in the rectangular groove between the self-lubricating wear-reducing plates, the rotation of the locking pin is restricted, thereby achieving the purpose of preventing the locking pin from rotating. The problem is that although the device achieves the purpose of preventing the locking pin from rotating, it has a complex structure, a large number of parts, and the four high-strength brass self-lubricating wear-reducing plates are expensive and occupy a large space under the beam. Summary of the invention

[0003] Design purpose: To avoid the shortcomings of the background technology, a locking pin anti-rotation device is designed that can achieve the goal of locking pin anti-rotation while simplifying the structure, reducing the number of parts, lowering the production cost, and reducing the space occupied by the mechanism.

[0004] Design scheme: In order to achieve the above design objectives. The utility model has the following structural design features: 1. A thread is provided at one end of the connecting rod, which can be connected to the threaded hole reserved on the locking pin; a shoulder is provided at the other end of the connecting rod, which is used to install the bearing and stop the inner ring of the bearing; a slot is provided at the end of the shoulder, which can be used to place an elastic retaining ring for the shaft to limit the bearing to the position designed for the shoulder; two symmetrical planes are provided in the middle of the connecting rod, which can be used to tighten the thread. 2. Two rows of mounting holes are provided on both sides of the π-shaped guide groove, which can be connected to the mounting holes reserved on the bottom plate of the turnout beam by bolts; the spacing between the two baffles of the π-shaped guide groove is slightly larger than the diameter of the outer ring of the bearing (≤0.5mm), ensuring that the bearing can roll flexibly in the guide groove. Its working principle is as follows: (1) Since the bearing is stuck in the π-shaped guide groove and the distance between the baffles inside the π-shaped guide groove is only slightly larger than the bearing diameter, the bearing cannot deflect toward the baffles on both sides in the π-shaped guide groove; further, the locking pin is restricted from rotating around its axis by the connecting rod, thereby achieving the purpose of preventing the locking pin from rotating; (2) When the locking pin moves, it can drive the bearing at the end of the connecting rod to move back and forth in the π-shaped guide groove; (3) There is enough distance between the top of the connecting rod where the bearing is installed and the lower plane of the π-shaped guide groove. Without removing the π-shaped guide groove and the locking pin, the connecting rod and bearing combination can be installed or removed.

[0005] Technical solution: A locking pin anti-rotation device, a π-shaped guide groove is installed on the bottom plate of the turnout beam, one end of the connecting rod is located in the π-shaped guide groove through a bearing, and the other end of the connecting rod is connected to the locking pin.

[0006] Compared with the background technology, the present invention has the following advantages: first, while realizing the anti-rotation of the locking pin, the structure is simplified, the number of parts is reduced, and the space occupied is smaller; second, the present invention realizes the purpose of anti-rotation of the locking pin with only a combination of a connecting rod and a bearing and a π-shaped guide groove. Compared with the background technology, the structure is greatly simplified, the number of parts is greatly reduced, and the overall space occupied by the anti-rotation device is reduced; third, the production cost is lower. Since the π-shaped guide groove adopts ordinary steel and the bearing adopts standard rolling bearing, a large amount of self-lubricating high-strength brass material is eliminated, thereby greatly reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the locking pin anti-rotation device.

[0008] Figure 2 yes Figure 1 Schematic diagram of the front and side views of the middle connecting rod structure.

[0009] Figure 3 yes Figure 1 Schematic diagram of the front and side views of the medium π-shaped guide groove structure.

[0010] Figure 4 It is a schematic diagram of the connecting rod and bearing combination.

[0011] Figure 5 It is a schematic diagram of the background technology structure. DETAILED DESCRIPTION

[0012] Reference Figure 1 A locking pin anti-rotation device, a π-shaped guide groove 3 is installed on the bottom plate 1 of the turnout beam, one end of a connecting rod 4 is located in the π-shaped guide groove 3 through a bearing, and the other end of the connecting rod 4 is connected to a locking pin 5.

[0013] (1) The locking pin 5 is drilled with a threaded hole (see Figure 2 and Figure 4 ), by clamping the clamping surface 4-3 on the clamping link 4 (see Figure 1 ), the thread (segment) 4-4 on the connecting rod 4 is screwed and connected with the locking pin 5, and there is a spring washer 8 between the connecting rod 4 and the locking pin (see Figure 3 ), to prevent the connecting rod from loosening;

[0014] (2) The bearing 6 is installed on the shoulder section of the connecting rod. A shaft elastic ring 7 is installed in the slot at the end of the connecting rod. The bearing is installed on the end of the connecting rod to form a connecting rod and bearing combination (see Figure 4 );

[0015] (3) The π-shaped guide groove is located directly above the locking pin (see Figure 3 ), consisting of a guide groove upper plane 3-1, a guide groove lower plane 3-3, and a guide groove baffle 3-4. Two rows of mounting holes 3-2 are provided on both sides of the guide groove upper plane 3-1, which are fixed to the turnout beam bottom plate 1 by bolts. The distance between the two baffles 3-4 of the π-shaped guide groove is slightly larger than the outer ring diameter of the bearing (≤0.5mm);

[0016] (4) One end of the connecting rod 4 and the bearing combination is connected to the locking pin, and the bearing at the other end extends between the two baffles of the π-shaped guide groove. Since the distance between the two baffles of the guide groove is slightly larger than the diameter of the outer ring of the bearing, the bearing can roll flexibly in the guide groove.

[0017] (5) When the lock pin moves, it can drive the bearing at the end of the connecting rod to move back and forth in the π-shaped guide groove;

[0018] (6) Since the bearing is stuck in the π-shaped guide groove and the distance between the baffles inside the π-shaped guide groove is only slightly larger than the bearing diameter, the bearing cannot deflect toward the baffles on both sides in the π-shaped guide groove; further, the connecting rod restricts the lock pin from rotating around its axis, thereby achieving the purpose of preventing the lock pin from rotating.

[0019] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of the present utility model, these textual descriptions are only simple textual descriptions of the design concept of the present utility model, rather than limitations on the design concept of the present utility model. Any combination, addition or modification that does not exceed the design concept of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A lock pin anti-rotation device, characterized in that: The π-shaped guide groove (3) is installed on the bottom plate (1) of the turnout beam, one end of the connecting rod (4) is located in the π-shaped guide groove (3) through a bearing, and the other end of the connecting rod (4) is connected to a locking pin (5).

2. The locking pin anti-rotation device according to claim 1 is characterized in that: A thread (4-4) is provided at one end of the connecting rod (4) for connection with a threaded hole reserved on the locking pin (5); a shaft shoulder (4-2) is provided at the other end of the connecting rod (4) for mounting a bearing and stopping the inner ring of the bearing; a groove (4-1) is provided at the end of the shaft shoulder for placing a shaft elastic retaining ring to limit the bearing at the designed position of the shaft shoulder.

3. The lock pin anti-rotation device according to claim 1, characterized in that: Two mutually symmetrical clamping concave surfaces (4-3) are provided in the middle of the connecting rod (4) for tightening the threads.

4. The lock pin anti-rotation device according to claim 1, characterized in that: Two rows of mounting holes are provided on both sides of the π-shaped guide groove (3), which are connected to the mounting holes reserved on the bottom plate of the turnout beam by bolts.

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