Double-station reciprocating friction-wear testing machine
By designing a dual-station reciprocating friction and wear testing machine, the problem of not being able to perform multi-condition comparative testing in existing technologies has been solved, and high-precision friction performance parameter testing and repeatability verification have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINAN YIHUA TRIBOLOGY TESTING TECH CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-05-15
AI Technical Summary
Existing reciprocating friction and wear testing machines typically have only one testing station, which cannot meet the needs of multi-condition comparative testing and repeatability verification.
A dual-station reciprocating friction and wear testing machine was designed, which has two parallel test stations. Each station is independently equipped with a test force loading mechanism, a friction force measuring mechanism, and a heating mechanism. The synchronous or asynchronous movement of the two test stations is achieved through a gearbox and crank-connecting rod mechanism driven by a servo motor. It can test friction performance parameters under different test forces, frequencies, and temperatures.
It enables the simultaneous execution of two sets of experiments, meeting the needs of multi-condition comparison testing and repeatability verification, improving the accuracy and stability of experimental measurements, offsetting cyclic inertia, and ensuring the reliability of experimental results.
Smart Images
Figure CN224247525U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a dual-station reciprocating friction and wear testing machine, belonging to the technical field of testing machines. Background Technology
[0002] Reciprocating friction and wear testing machines can test and evaluate the friction and wear performance of parts or materials by simulating the reciprocating motion and planar contact friction and wear conditions of actual parts. Existing reciprocating friction and wear testing machines generally only have one testing station, allowing only one set of tests to be performed at a time, which cannot meet the needs of multi-condition comparative testing and repeatability verification. Utility Model Content
[0003] The purpose of this invention is to provide a dual-station reciprocating friction and wear testing machine with high experimental measurement accuracy that can meet the requirements of multi-condition comparative testing and repeatability verification.
[0004] This utility model is achieved through the following technical solution: A dual-station reciprocating friction and wear testing machine, comprising a base, characterized in that: two parallel test stations are arranged on the base, each test station is provided with a test force loading mechanism, a friction force measuring mechanism, a heating mechanism, an upper friction pair mounting seat, a lower friction pair seat, and an oil box. The upper friction pair mounting seat is slidably mounted on a linear guide rail on the test bench. The test bench is fixedly mounted on the upper part of the base. The test force loading mechanism is located below the test bench. The test force loading mechanism includes a ball screw pair, a force application seat, and a moving beam. The ball screw is vertically mounted on the base, and the moving beam is movably mounted inside the force application seat and parallel to the ball screw. The test bench is equipped with a lead screw connection, a compression spring connecting the top of the force application seat and the moving beam, a slider on the outside of the force application seat slidingly engaging with a linear guide rail vertically fixed on the test bench, a lower friction pair seat mounted on the upper plane of the force application seat via a slide rail, an oil box fixed on the lower friction pair seat, a heating mechanism located inside the oil box, and a friction force measuring mechanism mounted on the upper plane of the force application seat corresponding to the lower friction pair seat. It also includes a linear reciprocating drive mechanism, which includes a gearbox driven by a servo motor. The gearbox has two coaxial output shafts rotating in opposite directions, each connected to an indexing plate. The two indexing plates are connected to the upper friction pair mounting seats of the two test stations via crank connecting rods.
[0005] In operation, the lower sample is installed in an oil box containing oil, water, or mineralized liquid. A heating mechanism within the oil box heats the medium. The upper sample is mounted on the upper friction pair mounting seat. A test force loading mechanism applies the test force. When the ball screw pair operates, it drives the force application seat to move up and down. The upward movement of the force application seat causes the lower sample to move upward as well, contacting the upper sample and compressing the spring, thus forming a test force between the friction surfaces of the upper and lower samples. By controlling the movement of the force application seat, the applied test force and its magnitude can be controlled. A friction force measuring mechanism measures the friction force. The test force loading mechanism and friction force measuring mechanism for both test stations are independently set up. A linear reciprocating drive mechanism drives the upper samples at both test stations to reciprocate linearly. When the two indexing plates of the linear reciprocating drive mechanism rotate, they drive the upper friction pair mounting seats at both test stations to reciprocate linearly along their mating linear guides via two crank connecting rods, thereby driving the upper samples to reciprocate linearly. Since the two indexing plates rotate in opposite directions, the movement directions of the two sets of friction pairs are opposite. This invention can be used to test friction performance parameters such as friction force and friction coefficient under different test forces, test frequencies, and test temperatures.
[0006] Furthermore, to ensure the loading stability of the test force loading mechanism, a vertically arranged linear guide rail is fixed to the inner wall of the force application seat, and the moving beam slides in cooperation with the linear guide rail on the inner wall of the force application seat through a slider.
[0007] Furthermore, the indexing plate has multiple crank-connecting rod connection points at different distances from its center. By adjusting the connection position between the crank-connecting rod and the indexing plate, the amplitude of the reciprocating motion can be adjusted, thereby obtaining different displacements.
[0008] Furthermore, a pressure rod for mounting the upper friction pair is fixed inside the upper friction pair mounting base, and a loading force sensor for measuring the test force is connected to the upper end of the pressure rod. The magnitude of the test force can be measured by the loading force sensor.
[0009] The beneficial effects of this utility model are as follows: This utility model can test friction performance parameters such as friction force and friction coefficient under different test forces, test frequencies, and test temperatures; through the dual-station setting, two sets of tests can be carried out simultaneously, and the test force loading mechanisms of the two test stations are set separately, and the load parameters can be set separately. It can realize the "same synchronous" or "different comparison" test of the two sets of test forces, which can meet the needs of multi-condition comparison test and repeatability verification; by using a servo motor to drive the two sets of friction pairs reciprocating test simultaneously, the movement directions of the two stations are opposite, which can cancel the reciprocating inertia and ensure the accuracy of test measurement. Attached Figure Description
[0010] Figure 1 This is a front view schematic diagram of the present invention;
[0011] Figure 2 yes Figure 1 A top-down view;
[0012] Figure 3 yes Figure 1 A cross-sectional view;
[0013] Figure 4 This is a perspective view of the present invention;
[0014] In the figure, 1. base, 2. test force loading mechanism, 3. friction force measuring mechanism, 4. heating mechanism, 5. oil box, 6. upper clamp, 7. test bench, 8. loading force sensor, 9. gearbox, 10. servo motor, 11. first linear guide rail, 12. crank connecting rod, 13. indexing plate, 14. test bench frame, 15. pressure rod, 16. upper friction pair mounting seat, 17. lower friction pair seat;
[0015] 2.1 Ball screw pair; 2.2 Synchronous belt pulley; 2.3 Moving beam; 2.4 Second linear guide; 2.5 Force application seat; 2.6 Third linear guide; 2.7 Spring.
[0016] 9.1 Driving bevel gear, 9.2 Driven bevel gear, 9.3 Output shaft. Detailed Implementation
[0017] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:
[0018] As shown in the attached figure, a dual-station reciprocating friction and wear testing machine includes a base 1, which is a hollow structure. Two parallel testing stations are arranged on the base 1. Each testing station is independently equipped with a test force loading mechanism 2, a friction force measuring mechanism 3, a heating mechanism 4, an upper friction pair mounting seat 16, a lower friction pair seat 17, and an oil box 5. The upper friction pair mounting seat 16 is slidably mounted on a first linear guide rail 11 on a test bench 7. The test bench 7 is fixedly mounted on the upper part of the base 1 by a test bench frame 14. The first linear guide rail 11 is fixed on the test bench 7. The upper friction pair mounting seat 16 is used to mount the upper sample. During installation, the upper sample is mounted on the upper friction pair mounting seat 16 via a pressure rod 15. 6. The upper sample is mounted on the lower end of the pressure rod 15 via the upper clamp 6. The pressure rod 15 passes through the test bench 7, which has a slotted hole for the pressure rod 15 to move. The upper end of the pressure rod 15 is connected to a loading force sensor 8 for measuring the test force. The test force loading mechanism 2 is located below the test bench 7. The test force loading mechanism 2 includes a ball screw pair 2.1, a force application seat 2.5, and a moving beam 2.3. The ball screw pair 2.1 is vertically mounted on the base 1. The ball screw pair 2.1 is driven by a stepper motor (the stepper motor is not shown in the attached drawings of this embodiment). The stepper motor transmits power through the synchronous pulley 2.2 and the synchronous belt to drive the screw to move up and down. The force application seat 2.5 has a U-shaped structure. The moving beam 2. The lower friction pair seat 17 is movably mounted inside the force application seat 2.5 and connected to the ball screw pair 2.1. A spring 2.7 connects the top of the force application seat 2.5 to the moving beam 2.3. Slider blocks are connected to both sides of the force application seat 2.5. The force application seat 2.5 slides with the third linear guide rail 2.6, which is vertically fixed on the test bench 14, through the sliders on both sides. The lower friction pair seat 17 is mounted on the upper surface of the force application seat 2.5 via a slide rail. The oil box 5 is fixed on the lower friction pair seat 17 and is used to hold test media such as oil or water. The heating mechanism 4 is located inside the oil box 5 and uses a stainless steel heating tube, which is submerged and installed at the bottom of the oil box 5. The friction force measuring mechanism 3 is located corresponding to the lower friction pair seat 17. The upper surface of the force-applying seat 2.5 includes a friction force measuring mechanism 3, which employs a friction force sensor connected to the lower friction pair seat 17 for measuring friction force. It also includes a linear reciprocating drive mechanism comprising a servo motor 10, a gearbox 9, an indexing plate 13, and a crank connecting rod 12. The servo motor 10 and gearbox 9 are fixed to the base. The gearbox 9 contains a driving bevel gear 9.1 and two driven bevel gears 9.2 meshing with the driving bevel gear 9.1. The two driven bevel gears 9.2 are respectively mounted on two output shafts 9.3, which are coaxial. The servo motor 10 is connected to the main shaft inside the gearbox 9 where the driving bevel gear 9.1 is mounted, and to the two output shafts 9.Each of the two indexing plates 13 is connected to a crank connecting rod 12, and each indexing plate 13 is connected to the upper friction pair mounting base 16 of the two test stations. When the servo motor 10 rotates, it drives the two indexing plates 13 to rotate in opposite directions through the meshing transmission of bevel gears. This, in turn, drives the upper friction pair mounting base 16 and the upper sample at the two test stations to reciprocate through the two crank connecting rods 12. The friction pairs at the two stations move in opposite directions, which cancels out the reciprocating inertia and ensures the accuracy of the test measurement.
[0019] To ensure the operational stability of the test force loading mechanism, in this embodiment, vertically arranged second linear guides 2.4 are fixed to the inner walls of both sides of the force application seat 2.5. The moving beam 2.3 has an inverted U-shaped structure, and its two sides slide against the second linear guides 2.4 on the inner walls of the force application seat 2.5 via sliders. The moving beam 2.3 can be guided up and down by the second linear guides 2.4, ensuring the operational stability of the test force loading mechanism.
[0020] To facilitate adjustment of the reciprocating motion amplitude, it is preferable to set multiple crank-connecting rod connection points at different distances from the center of the indexing plate 13. By adjusting the connection position between the crank-connecting rod 12 and the indexing plate, the magnitude of the reciprocating motion amplitude can be adjusted, thereby obtaining different displacements.
[0021] The friction sensor and the loading force sensor in this embodiment are both existing technologies.
[0022] The friction pair of this invention is a pin-disc or ball-disc type. During operation, the lower sample is fixed in the oil box 5 with screws. The oil box 5 contains oil, water, or mineralized liquid, etc., while the upper sample is mounted on the lower end of the pressure rod 15. When the test force loading mechanism 2 applies the test force, it drives the force application seat 2.5 upward through the ball screw pair, simultaneously driving the lower sample upward to contact the upper sample and compress the spring 2.7, forming a test force between the friction surfaces of the upper and lower samples. The magnitude of the test force is measured by the loading force sensor 8. The test force loading range of this invention is 1N-1000N. The linear reciprocating drive mechanism drives the upper friction pair mounting seats 16 of the two test positions to reciprocate linearly through two counter-rotating indexing plates 13 and a crank connecting rod 12, thereby driving the two upper samples to reciprocate linearly. During the test, the friction force is measured by the friction force measuring mechanism. By controlling the movement of the force application seat 2.5, the application and magnitude of the test force can be controlled.
[0023] This invention can be used to test friction performance parameters such as friction force and friction coefficient under different test forces, test frequencies, and test temperatures.
[0024] The signal acquisition, processing, and electrical control system used in this invention is existing technology.
[0025] The other parts in this embodiment are all existing technologies and will not be described in detail here.
Claims
1. A dual-station reciprocating friction and wear testing machine, comprising a base, characterized in that: The base has two parallel test stations, each equipped with a test force loading mechanism, a friction force measuring mechanism, a heating mechanism, an upper friction pair mounting seat, a lower friction pair seat, and an oil box. The upper friction pair mounting seat is slidably mounted on a linear guide rail on the test bench. The test bench is fixedly mounted on the upper part of the base, and the test force loading mechanism is located below the test bench. The test force loading mechanism includes a ball screw pair, a force application seat, and a moving beam. The lead screw of the ball screw pair is vertically mounted on the base, and the moving beam is movably mounted inside the force application seat and connected to the lead screw of the ball screw pair. A spring is connected between the top of the force application seat and the moving beam. The spring, the outer side of the force-applying seat slides with a linear guide rail fixed vertically on the test bench via a slider, the lower friction pair seat is set on the upper plane of the force-applying seat via a slide rail, the oil box is fixed on the lower friction pair seat, the heating mechanism is set inside the oil box, and the friction force measuring mechanism is set on the upper plane of the force-applying seat corresponding to the lower friction pair seat; it also includes a linear reciprocating drive mechanism, the linear reciprocating drive mechanism includes a gearbox driven by a servo motor, the gearbox has two coaxial output shafts with opposite rotation directions, each output shaft is connected to an indexing plate, and the two indexing plates are respectively connected to the upper friction pair mounting seats of the two test positions via crank connecting rods.
2. The dual-station reciprocating friction and wear testing machine according to claim 1, characterized in that: The inner wall of the force-applying seat is fixed with a vertically arranged linear guide rail, and the moving beam slides in cooperation with the linear guide rail on the inner wall of the force-applying seat through a slider.
3. The dual-station reciprocating friction and wear testing machine according to claim 1 or 2, characterized in that: The indexing plate has multiple crank-connecting rod connection points at different distances from the center of the indexing plate.
4. The dual-station reciprocating friction and wear testing machine according to claim 1 or 2, characterized in that: A pressure rod for mounting the upper friction pair is fixed inside the upper friction pair mounting base, and a loading force sensor for measuring the test force is connected to the upper end of the pressure rod.