Railway turnout switch machine friction torque limiter test bench

Abstract

The utility model provides a test bench for a friction torque limiter of a railway turnout switch machine. The test bench comprises a rack, an original driving motor set, a main shaft and a linear guide rail cylinder, the original driving motor group is connected to the linear guide rail in a sliding manner, the original driving motor group is connected with a telescopic rod of the air cylinder, and a pinion on the original driving motor group is meshed with and separated from a gear on the test piece; a torque loader, a torque sensor, a main shaft, a test piece and a direct connection driving servo motor group are sequentially arranged on a straight line where the main shaft is positioned on the rack; the two ends of the main shaft are connected with the test piece and the torque sensor respectively, the other end of the torque sensor is connected with the torque loader, and the direct-connection driving servo motor set drives the test piece to rotate through a drive plate connected with the end, close to the test piece, of the direct-connection driving servo motor set and is used for factory debugging and inspection of the torque limiter installed at the motor shaft end. And testing the stability, environmental influence and service time of the torque limiter.

Description

Technical Field

[0001] The utility model belongs to the field of rail transportation testing equipment, and in particular relates to a railway turnout machine friction torque limiter test bench. Background Art

[0002] Electric switches are used to switch and lock switches. To ensure transportation safety and protect equipment, their maximum output force needs to be limited, typically by limiting the maximum torque during power transmission. A torque limiter is installed at the motor shaft extension and is used in applications where the motor's maximum output torque is limited. The torque limiter in electric switches is used to limit maximum output force. Currently, the ZD6 series electric switches incorporate a torque limiter integrated into the reducer. A clamp secures the internal gear. When the load exceeds a set value, the internal gear rotates, the output shaft stops, and the output torque balances with the load, eliminating power output from the output shaft. This effectively limits maximum output force. ZD9 / ZDJ9 switches incorporate a friction connector at the reducer output as a torque limiter. The input end of the friction connector meshes with the reducer gear, while the output end is connected to the ball screw. When the load exceeds a set value, the output end stops rotating, eliminating power output and limiting maximum output force.

[0003] The switch mechanism operates by decelerating the motor, which then drives the friction torque limiter on the lead screw, which in turn rotates the lead screw. The nut and push-pull rods on the lead screw then drive the switch to the switch. If the switch is obstructed during the switch, causing the torque limiter to slip, the switch will time out and trigger an alarm. Therefore, the long-term stability of the torque limiter's set torque directly impacts the switch mechanism's reliability and, consequently, driving safety. Utility Model Content

[0004] The purpose of the utility model is to provide a railway turnout switch friction torque limiter test bench with a simple and reliable structure and convenient adjustment. It is used for factory commissioning and inspection of the torque limiter installed on the motor shaft end, and for testing the torque limiter's stability, environmental impact and service life.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A railway turnout machine friction torque limiter test bench includes a frame 1, an original drive motor group 2, a main shaft fixedly connected to the frame 1, a linear guide 13 and a cylinder 14; the original drive motor group 2 is slidably connected to the linear guide 13, the original drive motor group 2 is connected to the telescopic rod of the cylinder 14, and the pinion on the original drive motor group 2 engages and disengages with the gear on the test piece 6; a torque loader 5, a torque sensor 4 and the main shaft, the test piece 6 and a direct-drive servo motor group 8 are arranged in sequence on the straight line where the main shaft on the frame 1 is located; the axis of the original drive motor group 2 is parallel to the main shaft; the two ends of the main shaft are respectively connected to the test piece 6 and the torque sensor 4, the other end of the torque sensor 4 is connected to the torque loader 5, and the direct-drive servo motor group 8 drives the test piece 6 to rotate through a dial 17 connected to one end thereof close to the test piece 6.

[0007] As a better technical solution of the present invention, a stopper 19 is fixedly connected to the motor shaft of the direct-drive servo motor group 8, and a mounting bracket 22 is fixedly connected to the housing of the direct-drive servo motor group 8. Springs 20 are installed between the two sides of the stopper 19 and the mounting bracket 22 to limit the swing of the stopper 19, and two travel switches 21 are installed on the mounting bracket 22 to limit the maximum displacement of the swing of the stopper 19.

[0008] As a more optimal technical solution of the present invention, the direct-drive servo motor group 8 is fixedly connected to the tailstock 7, and the tailstock 7 is fixedly connected to the screw 16. The screw 16 is parallel to the main shaft and is driven to move by the motor reducer 15.

[0009] As a more optimal technical solution of the present invention, the torque loader 5 is a magnetic powder brake or an electromagnetic clutch.

[0010] As a more optimal technical solution of the present invention, the main shaft is installed on the main bearing seat 3, and the main bearing seat 3 is fixedly connected to the frame 1.

[0011] As a more optimal technical solution of the present invention, a cover is installed on the frame 1.

[0012] Beneficial effects:

[0013] The railway turnout machine friction torque limiter test bench provided by the utility model has a simple and reliable structure and is easy to adjust. It is used for factory commissioning and inspection of the torque limiter installed on the motor shaft end, and tests the torque limiter's stability, environmental impact and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a front view of a railway turnout machine friction torque limiter test bench.

[0015] Figure 2 yes Figure 1 AA section view of the .

[0016] Figure 3 The utility model is a top view of a railway turnout machine friction torque limiter test bench.

[0017] Figure 4 This is a top view of the original drive motor unit of the present utility model.

[0018] Figure 5 This is the right side view of the original drive motor assembly of the present utility model.

[0019] Figure 6 It is a top view of the direct-drive servo motor group of the present utility model.

[0020] Figure 7 It is the right side view of the direct-drive servo motor group of the present utility model. DETAILED DESCRIPTION

[0021] The present invention is described in further detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 7 As shown, the utility model provides a railway turnout switch friction torque limiter test bench, including a frame 1, an original drive motor group 2, a main shaft fixedly connected to the frame 1, a linear guide 13 and a cylinder 14; the original drive motor group 2 is slidably connected to the linear guide 13, the original drive motor group 2 is connected to the telescopic rod of the cylinder 14, and the pinion on the original drive motor group 2 engages and disengages with the gear on the test piece 6; a torque loader 5, a torque sensor 4 and the main shaft, the test piece 6 and a direct-drive servo motor group 8 are sequentially arranged on the straight line where the main shaft on the frame 1 is located; the axis of the original drive motor group 2 is parallel to the main shaft; the two ends of the main shaft are respectively connected to the test piece 6 and the torque sensor 4, the other end of the torque sensor 4 is connected to the torque loader 5, and the direct-drive servo motor group 8 drives the test piece 6 to rotate through a dial 17 connected to one end thereof close to the test piece 6.

[0023] In some embodiments, a stopper 19 is fixedly connected to the motor shaft of the direct-coupled servo motor assembly 8. A mounting bracket 22 is fixedly connected to the housing of the direct-coupled servo motor assembly 8. Springs 20 are installed between the stopper 19 and the mounting bracket 22 to limit the swing of the stopper 19. Two limit switches 21 are installed on the mounting bracket 22 to limit the maximum swing displacement of the stopper 19. The direct-coupled servo motor assembly 8 is mounted on a tailstock 7 supported by a linear guide. Driven by a motor reducer 15 and a lead screw 16, the tailstock 7 can move left and right along the main axis, facilitating the installation and removal of the test piece 6. The dial 17 at the left end and the direct-coupled servo motor assembly 8 on the shaft of the tailstock 7 drive the rotation of the test piece 6. The direct-coupled servo motor assembly 8 is supported by rolling bearings 18 and is supported by the bearing cap formed at the right end of the tailstock 7, allowing it to rotate about the main axis. The direct-coupled servo motor assembly 8 is mounted on the stopper 19, and springs 20 on either side of the stopper limit the left and right swing of the stopper. The limit switches 21 limit the maximum swing displacement of the stopper. When the output torque of the direct-drive servo motor group 8 exceeds the torque set by the spring 20 and the limit switch 21, the limit switch 21 will be activated to stop the motor from rotating, thereby achieving the purpose of limiting overload and alarming.

[0024] In some embodiments, the direct-drive servo motor group 8 is fixedly connected to the tailstock 7 , and the tailstock 7 is fixedly connected to the lead screw 16 . The lead screw 16 is parallel to the main shaft and is driven to move by the motor reducer 15 .

[0025] In some embodiments, the torque loader 5 is a magnetic powder brake or an electromagnetic clutch, and the output torque can be controlled by changing its supply voltage or current.

[0026] In some embodiments, the main shaft is mounted on a main bearing seat 3 , and the main bearing seat 3 is fixedly connected to the frame 1 .

[0027] In some embodiments, a cover is installed on the frame 1.

[0028] In some embodiments, the test bench further includes an ambient temperature and humidity control unit, a cryogenic nitrogen system, and a computer measurement and control system. The ambient temperature and humidity control unit is used to control the ambient temperature and humidity inside the hood; the computer measurement and control system is used to control the original drive motor unit 2, cylinder 14, torque loader 5, torque sensor 4, direct-drive servo motor unit 8, limit switch 21, and reducer.

[0029] The present utility model switch machine friction torque limiter test bench mainly consists of a frame 1, an original drive motor unit 2, a main bearing seat 3, a torque sensor 4, a torque loader 5, a test piece 6, a tailstock 7, and a direct-drive servo motor unit 8. The main bearing seat 3, torque sensor 4, torque loader 5, test piece 6, tailstock 7, and direct-drive servo motor unit 8 are arranged on a main axis, while the axis of the original drive motor unit 2 is arranged parallel to the main axis and can move along a linear guide 13 arranged horizontally and vertically along the main axis. The movement is driven by a cylinder 14, which realizes the engagement and disengagement of the pinion on the original drive motor unit 2 and the gear on the test piece 6.

[0030] Put the test piece on the main shaft, move the original drive motor group 2 forward to make the drive gear mesh with the torque limiter teeth, release the torque loader brake, start the drive motor and gradually increase the loader braking torque. Observe the torque value on the computer, adjust the torque limiter clamping force to make the torque value about 80% of the rated torque, adjust the torque limiter to rotate about 10 turns for running-in, until the torque value fluctuation does not exceed 5% after three starts, then adjust the clamping force to make the torque reach the rated value. Start three times to check that the slip torque and the rated torque do not exceed 2% to pass the test, and the test is completed;

[0031] The purpose of factory commissioning and torque testing of a friction torque limiter is to adjust the torque limiter to stable and acceptable parameters to meet factory requirements. The procedure involves experimental research on the friction and wear stability of the torque limiter's friction pair, including friction plate material selection and structural optimization. This process is conducted on a test bench that offers both manual and programmed test modes. Environmental simulations can be used to verify the torque limiter's operational stability in various climates. Service life testing is also included in the test bench's basic functions.

[0032] The main technical parameters of the test bench provided by this utility model are as follows:

[0033] Specimen dimensions: Actual torque limiter dimensions; Test torque: 0 to 50 N·m, HBM-T210 shaft-end torque sensor; Loading method: Magnetic powder brake, DC 24V; Drive motor: A - Original drive motor unit; B - Servo motor drive unit, 700W servo motor drive unit, 0 to 200 r / min; Environmental unit: Temperature: Room temperature to 80°C; Humidity: 5% to 95%; Low-temperature test: Room temperature to -40°C; Computer-recorded data: Time, torque, ambient temperature, ambient humidity, speed-torque-time curve; Weight: Approximately 1,000 kg.

[0034] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A railway turnout friction torque limiter test bench, characterized by: It includes a frame, an original drive motor group, a main shaft fixedly connected to the frame, a linear guide and a cylinder; the original drive motor group is slidably connected to the linear guide, the original drive motor group is connected to the telescopic rod of the cylinder, and the small gear on the original drive motor group engages and disengages with the gear on the test piece; the torque loader, torque sensor and main shaft, test piece and direct-drive servo motor group are arranged in sequence on the straight line where the main shaft on the frame is located; the axis of the original drive motor group is parallel to the main shaft; the two ends of the main shaft are respectively connected to the test piece and the torque sensor, the other end of the torque sensor is connected to the torque loader, and the direct-drive servo motor group drives the test piece to rotate through a dial connected to one end thereof close to the test piece.

2. The railway turnout friction torque limiter test bench according to claim 1, characterized in that: A stopper is fixedly connected to the motor shaft of the direct-drive servo motor group, and a mounting bracket is fixedly connected to the housing of the direct-drive servo motor group. Springs are installed between the two sides of the stopper and the mounting bracket to limit the swing of the stopper. Two travel switches are installed on the mounting bracket to limit the maximum displacement of the swing of the stopper.

3. The railway turnout friction torque limiter test bench according to claim 1, characterized in that: The direct-drive servo motor group is fixedly connected to the tailstock, and the tailstock is fixedly connected to the lead screw, which is parallel to the main shaft and is driven to move by the motor reducer 15.

4. The railway turnout friction torque limiter test bench according to claim 1, characterized in that: The torque loader is a magnetic powder brake or an electromagnetic clutch.

5. The railway turnout friction torque limiter test bench according to claim 1, characterized in that: The main shaft is installed on the main bearing seat, and the main bearing seat is fixedly connected to the frame.

6. The railway turnout friction torque limiter test bench according to claim 1, characterized in that: A cover is installed on the frame.

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