Turnout switch machine traditional system overload limiting device and turnout switch machine

Abstract

The utility model provides a turnout switch machine traditional system overload limiting device and a turnout switch machine, which comprise a driving motor, a gear lever arranged on a motor shaft, two force measuring springs, two travel switches and a small chain wheel arranged on the motor shaft, the gear lever is located in the center between the two motor coaxial supports, the travel switches are installed on the motor coaxial supports and located on the left side and the right side of the gear lever, the travel switches are triggered when the gear lever moves to the maximum resistance position, the two ends of the force measuring spring abut against the gear lever and the motor coaxial supports respectively, and the reliability of the switch machine for completing turnout switching is improved.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit, specifically relating to a turnout switching device, and more particularly to an overload limiting device for a traditional system of a turnout switch machine and a turnout switch machine. Background Technology

[0002] A switch machine is a turnout switching device. Its main function is to switch and lock the turnout switch rail, and to indicate and monitor the position and status of the turnout switch rail or frog rail within the interlocking zone. It is of great significance for the automatic and remote control of railway signals. Its actuating lever outputs force to push or pull the turnout switch rail, causing the movable part of the turnout to complete the switching. To ensure safety and prevent the turnout from being locked and connected when the turnout is not properly sealed, and to protect the switch machine, all types of switch machines are equipped with a maximum output force limiting mechanism for the actuating lever. Electric switch machines typically use a friction coupling (torque limiter) as the mechanism for adjusting and limiting the maximum output force, while electro-hydraulic switch machines use an overflow valve. This basically meets the requirements for setting the maximum output force of the actuating lever on the switch machine.

[0003] In practical use, the switching resistance of a turnout changes significantly with the turnout's condition. When the switching resistance increases to the point exceeding the maximum output force of the actuating lever, the switch machine cannot complete the switch, resulting in a turnout malfunction and inability to operate. Most switch machine transmission systems use friction couplings (torque limiters) to prevent system overload. However, friction is affected by changes in normal pressure and the friction coefficient of the friction plates, leading to unstable torque limits. Friction plates made of organic composite materials are particularly susceptible to environmental temperature and humidity fluctuations, causing significant variations in their torque limit and impacting the switch machine's reliability. Furthermore, both the friction coupling and the relief valve have a probability of parameter changes during operation, leading to a decrease in the maximum output force setting of the actuating lever, which can also cause turnout malfunctions.

[0004] Improve the reliability of switch machines in switching turnouts. Utility Model Content

[0005] The purpose of this invention is to provide an overload limiting device for a traditional turnout switching machine system, thereby improving the reliability of the turnout switching machine in completing turnout conversions.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An overload limiting device for a conventional system of a turnout switch machine includes a drive motor 1, a stop lever 4 mounted on the motor shaft, two force-measuring springs 5, two limit switches 7, and a small sprocket 8 mounted on the motor shaft. A coaxial bracket 3 is fixedly connected to the housing of the drive motor 1. The stop lever 4 is located at the center between the two coaxial brackets 3. The limit switches 7 are mounted on the coaxial brackets 3 on the left and right sides of the stop lever 4. When the stop lever moves to the position of maximum resistance, the limit switches 7 are triggered. The two ends of the force-measuring springs 5 ​​abut against the stop lever 4 and the coaxial brackets 3, respectively.

[0008] As a preferred technical solution of this utility model, a reducer 2 is installed on the motor shaft of the drive motor 1.

[0009] As a preferred technical solution of this utility model, the force measuring spring 5 and the motor coaxial bracket 3 are connected by a spring force adjusting screw 6, and the force measuring spring 5 abuts against the groove on the stop bar 4.

[0010] This utility model also provides a turnout switch machine, including the overload limiting device of the traditional system of the turnout switch machine, a connecting shaft 11 installed on the turnout, and a large sprocket 9 sleeved on the connecting shaft 11. The large sprocket 9 and the small sprocket 8 are connected by chain drive.

[0011] As a preferred technical solution of this utility model, the small sprocket 8 and the large sprocket 9 are connected by a sleeve roller chain 10.

[0012] Beneficial effects

[0013] The overload limiting device for the traditional system of the turnout switch provided by this utility model has a simple structure, low maintenance cost, prevents turnout switching jamming failure, and improves the reliability of the switch. Attached Figure Description

[0014] Figure 1 This is a front view of the overload limiting device of the conventional system of the turnout switch machine of this utility model.

[0015] Figure 2 This is a right view of the overload limiting device of the conventional system of the turnout switch machine of this utility model.

[0016] Figure 3 This is a schematic diagram of the turnout switching machine of this utility model.

[0017] Figure 4 This is a schematic diagram of the spring and switch combination of the overload limiting device of the conventional system of the turnout switch machine of this utility model. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] like Figure 1 and2 As shown, this utility model provides an overload limiting device for a traditional system of a turnout switch machine, including a drive motor 1, a stop lever 4 mounted on the motor shaft, two force-measuring springs 5, two limit switches 7, and a small sprocket 8 mounted on the motor shaft. A motor coaxial bracket 3 is fixedly connected to the housing of the drive motor 1. The stop lever 4 is located at the center between the two motor coaxial brackets 3. The limit switches 7 are mounted on the motor coaxial brackets 3 on the left and right sides of the stop lever 4. When the stop lever moves to the position of maximum resistance, the limit switches 7 are triggered. The two ends of the force-measuring springs 5 ​​abut against the stop lever 4 and the motor coaxial brackets 3, respectively.

[0020] In some embodiments, a reducer 2 is mounted on the motor shaft of the drive motor 1.

[0021] In some embodiments, the force-measuring spring 5 and the motor coaxial bracket 3 are connected by a spring force adjusting screw 6, and the force-measuring spring 5 abuts against the groove on the stop bar 4.

[0022] like Figure 3 and 4 As shown, this utility model also provides a turnout switch machine, including the overload limiting device of the traditional system of the turnout switch machine, a connecting shaft 11 installed on the turnout, and a large sprocket 9 sleeved on the connecting shaft 11. The small sprocket 8 and the large sprocket 9 are connected by chain drive.

[0023] In some embodiments, the small sprocket 8 and the large sprocket 9 mounted on the turnout are connected by a sleeve roller chain 10.

[0024] The usage process of this utility model is as follows:

[0025] This utility model mainly consists of a drive motor 1, a reducer 2, a coaxial motor bracket 3, a stop lever 4, a force-measuring spring 5, a spring force adjusting screw 6, a limit switch 7, a small sprocket 8, a large sprocket 9, and a sleeve roller chain 10. The large sprocket 9 replaces the current friction torque limiter and is installed in the same position. The reverse torque generated when the drive motor 1 and reducer 2 output driving torque is used for signaling. The reverse torque causes the stop lever 4 on the motor and reducer to rotate around the center of the motor shaft on the coaxial motor bracket 3. The force-measuring spring 5 prevents the stop lever 4 from rotating and is compressed. When the compression of the spring 5 reaches the set limit value, the limit switch 7 is also triggered, controlling the drive motor 1 to stop rotating and triggering an alarm, thereby achieving the safety guarantee function of limiting the overload of the switch machine.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be covered within the protection scope of the present utility model.

Claims

1. A turnout machine traditional system overload limiting device, characterized in that: The drive motor, the gear lever installed on the motor shaft, two force measuring springs, two travel switches, a small sprocket installed on the motor shaft, and a motor coaxial support fixedly connected to the drive motor shell are included.

2. A turnout machine legacy system overload limiting device as defined in claim 1, wherein: A speed reducer is installed on the motor shaft of the drive motor.

3. A turnout machine legacy system overload limiting device as defined in claim 1, wherein: The force measuring spring and the motor coaxial support are connected through a spring force adjusting screw, and the force measuring spring is abutted against the groove on the gear lever.

4. A switch machine characterized by: The overload limiting device of the traditional system of the turnout switch machine, a connecting shaft installed on the turnout, and a large sprocket sleeved on the connecting shaft are included.

5. A points machine according to claim 4, wherein: The small sprocket and the large sprocket are connected through a sleeve roller chain.

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