A reliability test bench for arc guide rail running-in test

Abstract

This invention discloses a reliability test bench for running-in testing of an arc-shaped guide rail, comprising a roller conveyor; a guide rail base on the roller conveyor for arc-shaped running-in; a guide rail fixed to the guide rail base; a loading fixture placed on a slider; a load sensor on the loading fixture for measuring the actual load on the slider; a pressure cylinder fixed on a matching support frame to increase pressure on the slider under test; a reducer output end connected to a gear via a coupling; the gear meshes with the teeth on the guide rail base to rotate and drive the track running-in; a pressure sensor for measuring the pressure on the slider is located between the pressure cylinder and the loading fixture; a tension / compression sensor for measuring the friction between the guide rail driven by the gear and the slider is located between the slider and the fixed platform; and a vibration sensor is located on the slider under test and the guide rail. This invention is used to measure the vibration and force conditions of a slider moving on an arc-shaped guide rail.

Description

Technical Field

[0001] This invention belongs to the field of guide rail pair testing, and in particular, it is a reliability test bench for the running-in and testing functions of a circular arc guide rail. Background Technology

[0002] A guide rail is a grooved or ridged structural component made of metal or other materials, used to support, fix, and guide moving devices or equipment while reducing friction. Guide rails have advantages such as simple structure, easy manufacturing, and high contact rigidity, making them suitable for machine tools with heavy cutting loads. As a transmission and guiding device, a guide rail pair generally consists of a slider, a guide rail, and rolling elements between them. Based on the shape of the guiding path, guide rails can be divided into linear guide rails and curved guide rails. Curved guide rails include circular arc guide rails and curved arc guide rails. Compared to general linear guide rails, the non-linear motion characteristics of circular arc guide rails make their prospects in the field of mechanical transmission broader. Currently, the theoretical research on linear guide rails is becoming increasingly mature, while research on circular arc guide rails is relatively weak. To gain a deeper understanding of the dynamic performance of circular arc guide rails, it is crucial to invent a mature and reliable test bench for running-in testing of circular arc guide rails. Summary of the Invention

[0003] The purpose of this invention is to provide a reliability test bench for the running-in and testing functions of circular arc guide rails, so as to realize the reliability test of circular arc guide rails.

[0004] The technical solution to achieve the purpose of this invention is as follows:

[0005] A reliability test bench for intermittent reciprocating motion of a lead screw guide rail includes an arc-shaped conveyor line, a guide rail base set on the arc-shaped conveyor line, a test arc guide rail fixed on the guide rail base, a test slider that cooperates with the test arc guide rail, a detection module, a loading module, two sets of drive modules, and a gap adjustment module used in conjunction with the drive modules.

[0006] The detection module is used to detect the load applied by the loading module and the frictional force between the two circular arc guide rails.

[0007] The tested slider is equipped with a loading module for applying load to the tested slider;

[0008] The drive module includes a drive unit and an external gear connected to the drive unit. The drive unit is used to drive the rotation of the external gear.

[0009] The gap adjustment module includes an internal gear for driving the gap adjustment unit of the internal gear;

[0010] The guide rail base is provided with gear teeth on both the inner and outer sides. The outer gear meshes with the outer side of the guide rail base, and the inner gear meshes with the inner side of the guide rail base.

[0011] The gap adjustment unit is used to adjust the gap between the internal gear and the guide rail base;

[0012] The center line connecting the internal and external gears used in the same set passes through the center of the circular arc guide rail being measured;

[0013] The loading module is positioned between the two sets of driver modules.

[0014] The significant advantages of this invention compared to existing technologies are:

[0015] (1) The reliability test bench for intermittent running-in testing of the circular arc guide rail of the present invention has a motor driving the reducer to rotate in both directions, the reducer driving the coupling to rotate in both directions, the coupling driving the gear to rotate in both directions through the shaft, the gear driving the guide rail base to reciprocate, and the guide rail base driving the guide rail under test to reciprocate; the slider and the loading fixture are fixed relative to the support, a load sensor is installed above the loading fixture to measure the load applied by the booster cylinder, and a tension and compression sensor is installed between the loading fixture and the side support to measure the tension and compression generated during the transmission process; it is more in line with the actual working conditions of the circular arc guide rail, making the test more accurate.

[0016] (2) The test bench of the present invention uses hydraulic loading for the slider load, which makes the loading stable and has a wide load range.

[0017] (3) The test bench of the present invention uses two motors arranged symmetrically to ensure that the guide rail base is subjected to more reasonable force, and the gear transmission is selected to make the transmission more stable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the test bench of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of some components of the test bench of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Combination Figure 1-2A reliability test bench for intermittent reciprocating motion of a lead screw guide includes a raceway 14, a roller 15, a guide base 12, a detection module, a lead screw guide under test, a loading module, and two drive modules. Each drive module is equipped with a clearance adjustment module. The loading module is positioned between the two drive modules, and the angles between the two drive modules and the loading module about the center of the lead screw guide under test are equal. The two drive modules are symmetrically arranged about the loading module. The lead screw guide under test includes a mating arc guide 10 and a slider 7. The loading module includes a booster cylinder 1 and a loading support 18. The drive module includes a motor 3, a reducer 2, a coupling 9, and an external gear 11. The clearance adjustment module includes an internal gear 13, a clamping bracket 16, a clamping screw 17, and a sliding seat 19. The detection module includes a load sensor 4, a loading fixture 5, a tension / compression sensor 6, and a bracket 8.

[0022] The raceway 14 forms an arc-shaped conveyor line through multiple rollers 15 disposed thereon. The guide rail base 12 is disposed on the rollers 15 and can slide along the rollers 15. The arc-shaped guide rail 10 under test is fixed on the guide rail base 12. The center of the arc-shaped guide rail 10 under test is concentric with the center of the arc-shaped conveyor line.

[0023] The motor 3 is fixed on a motor base and connected to the reducer 2. The reducer 2 is connected to the gear shaft of the external gear 11 via a coupling 9. The guide rail base 12 has gear teeth on both its inner and outer sides. The external gear 11 meshes with the outer side of the guide rail base 12, and the inner side of the guide rail base 12 meshes with the internal gear 13. The two ends of the gear shaft of the internal gear 13 are rotatably supported on the sliding seat 19, allowing it to slide linearly along the clamping bracket 16 in the radial direction of the arc-shaped conveyor line. The clamping screw 17 is threaded onto the clamping bracket 16. By rotating the clamping screw 17, the clamping screw 17 pushes the sliding seat 19, which in turn moves the internal gear 13. This allows adjustment of the gap between the internal gear 13 and the guide rail base 12, ensuring that the center of the measured arc-shaped guide rail 10 is concentric with the center of the arc-shaped conveyor line. In a further embodiment, the upper end of the gear shaft of the internal gear 13 is supported on the sliding seat 19 via a cylindrical roller bearing, and the lower end is supported on the sliding seat 19 via a ball bearing. The center line connecting the internal gear 13 and the external gear 11 used in the same set passes through the center of the circular arc guide rail 10 being measured, ensuring that the load is applied as evenly as possible to the guide rail base 12.

[0024] The booster cylinder 1 is fixed on the loading support 18. A loading fixture 5 is fixed to the upper end of the tested slider 7, and a load sensor 4 is fixed to the upper end of the loading fixture 5. The load sensor 4 is located directly below the booster cylinder 1. During testing, the booster cylinder 1 moves downwards, acting on the load sensor 4 and transmitting the force to the tested slider 7 through the loading fixture 5. The booster cylinder 1 applies a load to the tested slider 7, and the load sensor 4 detects the applied rated load force. Supports 8 are fixed on both sides of the loading support 18. Tension and compression sensors 6 are connected to the corresponding supports 8 on both sides of the loading fixture 5 to detect the frictional force generated when the tested arc guide rail 10 and the tested slider 7 slide relative to each other. The tension and compression sensors 6 have connecting pieces at both ends; one end is fixed to the side of the loading fixture 5 via the connecting piece, and the other end is fixed to the support 8 via a connector.

[0025] During testing, a load is applied to the tested slider 7 via the loading module, and the external gear 11 is driven to rotate by the motor 3. The external gear 11 drives the guide rail base 12, which meshes with it, to slide along the arc-shaped conveyor line, further driving the tested arc guide rail 10 to slide relative to the tested slider 7. The frictional force between the two is detected by the tension and pressure sensor 6.

[0026] The two drive modules are arranged symmetrically with respect to the center of the test lead screw guide rail with respect to the loading module, ensuring that the test guide rail is subjected to reasonable load.

Claims

1. A reliability test bench for running-in testing of circular arc guide rails, characterized in that, It includes an arc-shaped conveyor line, a guide rail base set on the arc-shaped conveyor line and capable of arc running-in, a measured arc guide rail fixed on the guide rail base, a measured slider that cooperates with the measured arc guide rail, a detection module, a loading module, two sets of drive modules, and a gap adjustment module used in conjunction with the drive modules. The detection module is used to detect the load applied by the loading module and the frictional force between the two circular arc guide rails. The tested slider is equipped with a loading module for applying load to the tested slider; The drive module includes a drive unit and an external gear connected to the drive unit. The drive unit is used to drive the rotation of the external gear. The gap adjustment module includes an internal gear for driving the gap adjustment unit of the internal gear; The guide rail base is provided with gear teeth on both the inner and outer sides. The outer gear meshes with the outer side of the guide rail base, and the inner gear meshes with the inner side of the guide rail base. The gap adjustment unit is used to adjust the gap between the internal gear and the guide rail base; The center line connecting the internal and external gears used in the same set passes through the center of the circular arc guide rail being measured; The loading module is positioned between the two sets of driver modules; The loading module includes a loading support and a booster cylinder fixed on the loading support; The detection module includes a load sensor and a tension / compression sensor; a loading fixture is fixed to the upper end of the slider under test, and a load sensor is fixed to the upper end of the loading fixture. The load sensor is located directly below the booster cylinder and is used to detect the load applied by the booster cylinder. Supports are fixed on both sides of the loading support, and the two sides of the loading fixture are connected to the corresponding support through tension / compression sensors to detect the friction between the arc guide rail under test and the slider under test.

2. The reliability test bench for running-in testing of circular arc guide rails according to claim 1, characterized in that, The drive unit includes a motor, a reducer, and a coupling. The motor is connected to the reducer; the reducer is connected via the gear shaft of the external gear of the coupling.

3. The reliability test bench for running-in testing of circular arc guide rails according to claim 1, characterized in that, The gap adjustment unit includes a clamping bracket, a clamping screw connected to the clamping bracket by a thread, a sliding seat for rotating and supporting the gear shaft of the internal gear and capable of sliding linearly along the clamping bracket, and the clamping screw for pushing the sliding seat to slide linearly.

4. The reliability test bench for the running-in test of the circular arc guide rail according to claim 3, characterized in that, The upper end of the internal gear is supported by a cylindrical roller bearing, and the lower end is supported on a sliding seat by a ball bearing.

5. The reliability test bench for running-in testing of circular arc guide rails according to claim 1, characterized in that, The arc-shaped conveyor line includes a raceway and multiple rollers arranged on the raceway.

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