Multi-station fatigue testing machine

Abstract

The invention relates to a multi-station fatigue testing machine which comprises a rack, at least two groups of sliding rail structures and a fatigue testing station, at least two groups of upper tool tables and lower tool tables are arranged on the periphery of the rack, the number of the upper tool tables and the number of the lower tool tables correspond to the number of the sliding rail structures, and the upper tool tables and the lower tool tables are installed on the upper portions and the lower portions of the sliding rail structures respectively and can ascend and descend along sliding rails; the upper tool driving device is arranged in the rack, the output end of the upper tool driving device is connected with each upper tool table, and the upper tool driving device is used for driving the upper tool tables to ascend and descend; and the lower tool driving device is arranged in the rack, the output end of the lower tool driving device is connected with each lower tool table, the lower tool driving device is used for driving the lower tool tables to ascend and descend, multiple stations are used for testing, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of air spring fatigue testing equipment, in particular to a multi-station fatigue testing machine. Background Art

[0002] As the global demand for environmental protection and energy conservation continues to increase, traditional automotive deceleration systems (such as mechanical brake systems) have many shortcomings in terms of energy consumption, cost and performance. As a new deceleration technology, air springs are gradually gaining attention due to their advantages such as light weight, high efficiency and safety. The market's requirements for vehicle comfort, durability and safety are increasing.

[0003] As a key component of the vehicle suspension system, air springs are subjected to complex cyclic loads in actual use. The repeated action of such loads often leads to fatigue of the air spring material, thus affecting its performance and life. When performing fatigue tests on air springs, traditional fatigue testing machines have problems such as insufficient test accuracy, low station utilization, and high test costs. It is necessary to provide a fatigue testing machine with a simple structure, stable operation, and the ability to perform various forms of fatigue tests and increase stations to meet the market demand for fatigue testing of air springs and similar components. Summary of the invention

[0004] In order to overcome at least one of the above problems, the present invention provides a multi-station fatigue testing machine, which performs testing at multiple stations to improve detection efficiency.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a multi-station fatigue testing machine, comprising:

[0006] The frame has at least two sets of slide rail structures arranged around it.

[0007] The fatigue test station includes at least two sets of upper tooling tables and lower tooling tables. The number of upper tooling tables and lower tooling tables corresponds to the slide rail structure. The upper tooling tables and lower tooling tables are respectively installed on the upper and lower parts of the slide rail structure and can be lifted and lowered along the slide rail.

[0008] The upper tooling drive device is arranged inside the frame, and its output end is connected to each upper tooling table to drive the lifting movement of the upper tooling table;

[0009] The lower tooling drive device is arranged inside the frame, and its output end is connected to each lower tooling table to drive the lifting movement of the lower tooling table.

[0010] Preferably, the upper tooling driving device comprises:

[0011] An upper tooling support frame is arranged on the frame;

[0012] The worm gear mechanism is installed on the upper tooling support frame;

[0013] The first motor has an output end connected to a worm gear mechanism to drive the worm gear mechanism to operate;

[0014] An output screw connected to the lower end of the worm gear mechanism;

[0015] The upper tooling output part has a central portion that is screwed to the output lead screw and a peripheral edge that is respectively connected to the upper tooling table and moves synchronously with the upper tooling table;

[0016] A plurality of guide shafts are longitudinally arranged in the frame and pass through the upper tooling output member to provide a guiding function, so that the upper tooling output member can move up and down under the drive of the output lead screw.

[0017] Preferably, the lower tooling driving device comprises:

[0018] A lower tooling support frame is arranged in the frame;

[0019] The lower tooling output shaft is installed on the lower tooling support frame;

[0020] The second motor is connected to the output shaft of the lower tooling through a belt drive;

[0021] A pair of rotating discs are arranged at both ends of the output shaft of the lower tooling;

[0022] The lower tooling output seat is installed on the slide rail structure and can move up and down; the lower tooling platform is installed on the upper part of the lower tooling output seat.

[0023] A crank has one end eccentrically connected to the turntable and the other end hinged to the lower end of the output seat of the lower tooling.

[0024] Preferably, an auxiliary support frame plate is provided in the middle of the frame, and the auxiliary support frame plate and the upper tooling support frame form a frame-shaped group structure for installing the output screw rod and the guide shaft. The lower end of the guide shaft is fixed on the auxiliary support frame plate, and the output screw rod is installed in the auxiliary support frame plate through a bearing; the second height sensor is arranged on the auxiliary support frame plate, and the lower end of the guide shaft is fixed to the auxiliary support frame plate.

[0025] Preferably, the upper part and the lower part of the frame are respectively provided with a first height sensor and a second height sensor for monitoring the lifting stroke of the upper tooling table.

[0026] Preferably, a pressure sensor is provided on the upper tooling table and / or the lower tooling table.

[0027] Preferably, it also includes an electrical control system and a photoelectric display, wherein the electrical control system is electrically connected to the first motor, the second motor, the pressure sensor and the height sensor, and is used to control motion parameters and display test data in real time.

[0028] Preferably, the turntable is provided with a handle base seat with adjustable position, and the turntable is provided with a guide rod and two positioning grooves; the handle base seat is provided with a guide hole and a positioning foot; the guide hole can be slidably sleeved in the guide rod, and the handle base seat can be slidably adjusted along the length direction of the guide rod; the positioning feet are arranged at the lower ends of both sides of the handle base seat, the positioning feet are adapted to the positioning grooves, slide in the positioning grooves, and the positioning feet can be locked in the positioning grooves, thereby fixing the handle base seat.

[0029] Preferably, the positioning groove is a convex-shaped sliding groove, and a locking block with a convex-shaped structure is embedded in the positioning groove. The positioning foot and the locking block can be locked. During the locking process, the locking block is stretched upward so that the locking block is clamped in the positioning groove to fix the handle base plate seat.

[0030] Preferably, a bearing seat and a bearing are provided on the handle base plate seat, the bearing seat is fixedly mounted on the handle base plate seat, the bearing is sleeved on the bearing seat, and the crank is sleeved on the bearing and is installed to rotate relative to the bearing seat; a countersink platform is provided on the handle base plate seat, the outer diameter of the bottom of the bearing seat is larger than the middle part of the bearing seat, the bottom of the bearing seat is sleeved on the countersink platform, and screw holes arranged in a ring are provided between the peripheral edge of the bottom of the bearing seat and the countersink platform, which are fixed by screws.

[0031] The beneficial effects of the present invention are: a multi-station fatigue testing machine, which can perform tests at multiple stations simultaneously, has stable operation, and the motion laws / modes of the upper and lower stations can be set independently. The motion law of the upper station is set by a motor, and the stroke of the lower station can be manually adjusted; a multifunctional fatigue testing machine that can perform various forms of fatigue tests to meet the market demand for fatigue testing of air springs and similar components. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 It is a schematic diagram of the overall structure of the multi-station fatigue testing machine of the present invention;

[0034] Figure 2 It is a side structural schematic diagram of the multi-station fatigue testing machine of the present invention;

[0035] Figure 3 is a front view structural schematic diagram of another embodiment of the multi-station fatigue testing machine of the present invention;

[0036] Figure 4 It is a schematic diagram of the turntable structure of the multi-station fatigue testing machine of the present invention;

[0037] Figure 5 yes Figure 4 Schematic diagram of the split structure.

[0038] Description of the drawings: 1. Frame, 11. Slide rail structure, 12. First height sensor, 13. Second height sensor, 14. Pressure sensor, 15. Photoelectric display; 21. Upper tooling table, 22. Lower tooling table, 3. Upper tooling support frame, 31. Worm gear mechanism, 32. First motor, 33. Output screw, 34. Upper tooling output member, 35. Guide shaft, 4. Lower tooling support frame, 41. Lower tooling output shaft, 42. Second motor, 421. Reducer, 43. Lower tooling output seat, 44. Crank, 5. Turntable, 51. Guide rod, 52. Positioning groove, 53. Locking block, 6. Handle base plate seat, 61. Guide hole, 62. Positioning foot, 63. Countersink table, 64. Screw hole, 7. Bearing seat, bearing 8. DETAILED DESCRIPTION

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0040] like Figure 1-3 The multi-station fatigue testing machine shown has at least two sets of slide rail structures 11 arranged on both sides of a frame 1 of a frame structure. The slide rail structures 11 are provided with fatigue testing stations. Multiple stations work simultaneously to improve the testing efficiency.

[0041] It consists of a frame 1, a fatigue test station, an upper tooling drive device, and a lower tooling drive device.

[0042] In a preferred embodiment, two sets of slide rail structures 11 are symmetrically arranged around the frame 1 .

[0043] The fatigue test station includes multiple sets of upper tooling tables 21 and lower tooling tables 22. The number of upper tooling tables 21 and lower tooling tables 22 corresponds to the slide rail structure 11. They are respectively installed on the upper and lower parts of the slide rail structure 11, and can move up and down along the slide rail to repeatedly squeeze the air spring for fatigue testing.

[0044] The upper tooling drive device is arranged inside the frame 1, and its output end is connected to each upper tooling table 21, and is used to drive the lifting movement of the upper tooling table 21; the lower tooling drive device is arranged inside the frame 1, and its output end is connected to each lower tooling table 22, and is used to drive the lifting movement of the lower tooling table 22.

[0045] In this embodiment, the components of the upper tooling drive include: an upper tooling support frame 3 , a worm gear mechanism 31 , a first motor 32 , an output screw 33 , an upper tooling output member 34 , and a plurality of guide shafts 35 .

[0046] An upper tooling support frame 3 is arranged on the upper part of the frame 1; a worm gear mechanism 31 is installed on the upper tooling support frame 3; a first motor 32, the output end of which is connected to the worm gear mechanism 31 to drive the worm gear mechanism 31 to operate; an output screw 33, which is connected to the lower end of the worm gear mechanism 31; an upper tooling output member 34, the middle part of which is screwed to the output screw 33, and the circumference is respectively connected to the upper tooling table 21, and moves synchronously with the upper tooling table 21; a plurality of guide shafts 35, which are longitudinally arranged in the frame 1 and pass through the upper tooling output member 34 to provide a guiding effect, so that it can only move up and down, so that the upper tooling output member 34 can move up and down under the drive of the output screw 33.

[0047] In this embodiment, the components of the lower tooling driving device include: a lower tooling support frame 4 , a lower tooling output shaft 41 , a second motor 42 , a pair of turntables 5 , a lower tooling output seat 43 , and a crank 44 .

[0048] A lower tooling support frame 4 is provided at the lower part of the frame 1; a lower tooling output shaft 41 is installed on the lower tooling support frame 4; a second motor 42 is connected to the lower tooling output shaft 41 through a belt drive; a pair of turntables 5 are provided at both ends of the lower tooling output shaft 41; a lower tooling output seat 43 is installed on the slide rail structure 11 and can move up and down; the lower tooling table 22 is installed on the upper part of the lower tooling output seat 43. A crank 44 has one end eccentrically connected to the turntable 5 and the other end is hinged to the lower end of the lower tooling output seat 43.

[0049] The second motor 42 outputs torque and cooperates with the reduction box 421 to reduce speed and increase torque, thereby achieving power output.

[0050] In one embodiment, the lower tooling output seat 43 is annularly surrounded by the frame 1 and is slidably connected to each slide rail structure 11. A pair of cranks 44 are respectively located at two symmetrical ends of the lower tooling output seat 43 to apply power to make the force more uniform.

[0051] In one embodiment, slide rail structures 11 are symmetrically arranged on both sides of a frame-shaped frame 1, and fatigue test stations are arranged on the slide rail structures 11 to form a symmetrical structure. Two stations work simultaneously to improve test efficiency.

[0052] An auxiliary support frame plate is arranged in the middle of the frame 1, and the auxiliary support frame plate and the upper tooling support frame 3 form a frame-shaped group structure of upper and lower structures, which is used to install the output screw rod and the guide shaft 35. The lower end of the guide shaft 35 is fixed on the auxiliary support frame plate, and the output screw rod is installed in the auxiliary support frame plate through the bearing 8; the second height sensor 13 is arranged on the auxiliary support frame plate, and the lower end of the guide shaft 35 is fixed to the auxiliary support frame plate.

[0053] The upper part and the lower part of the frame 1 are respectively provided with a first height sensor 12 and a second height sensor 13 for monitoring the lifting stroke of the upper tooling platform 21 so as to limit the lifting stroke height of the upper tooling platform 21 as required.

[0054] The upper tooling table 21 and / or the lower tooling table 22 are provided with a pressure sensor 14 for recording and feeding back the pressure in the fatigue test.

[0055] In this embodiment, the multi-station fatigue testing machine also includes an electrical control system and a photoelectric display 15. The electrical control system is electrically connected to the first motor 32, the second motor 42, the pressure sensor 14 and the height sensor for controlling motion parameters and displaying test data in real time.

[0056] The sensor also includes a frequency sensor, which is installed in the turntable 5 and provides accurate count data of the movement compression times of the lower tooling support frame in real time. The frequency sensor, height sensor, and pressure sensor 14 work together through multiple sensors to monitor and record key parameters in the test process in real time. The display system includes an electrical controller and a display, which collects and processes data in real time, and displays data trends and alarm information in real time through the display.

[0057] In this embodiment, a handle base plate seat 6 with an adjustable position is provided on the turntable 5 , and the handle base plate seat 6 is used to install the crank 44 .

[0058] Specifically, the turntable 5 comprises: a guide rod 51 and two positioning grooves 52. The handle base plate 6 comprises: a guide hole 61 and a positioning foot 62.

[0059] The guide hole 61 can be slidably sleeved in the guide rod 51 ; the handle base plate seat 6 can be slidably adjusted along the length direction of the guide rod 51 .

[0060] The positioning feet 62 are at the lower ends of both sides of the handle base plate seat 6 , and the positioning feet 62 are adapted to the positioning grooves 52 , slide in the positioning grooves 52 , and the positioning feet 62 can be locked in the positioning grooves 52 , thereby fixing the handle base plate seat 6 .

[0061] In one embodiment, the positioning groove 52 is a convex-shaped sliding groove, and its cross section is a convex-shaped structure.

[0062] A locking block 53 of the same convex structure is embedded in the positioning groove 52, and the positioning foot 62 and the locking block 53 can be locked. During the locking process, the locking block 53 is stretched upward so that the locking block 53 is clamped in the positioning groove 52, thereby fixing the handle base plate seat 6.

[0063] In one embodiment, a toothed groove is provided between the contacting surfaces of the locking block 53 and the positioning groove 5212 .

[0064] In one embodiment, the position is locked by passing a pin through the positioning foot 62 of the handle base plate seat 6 and the bottom surface of the positioning groove 52 .

[0065] In this embodiment, see Figure 4 , 5 A bearing seat 7 and a bearing 8 are provided on the handle base plate seat 6. The bearing seat 7 is fixedly installed on the handle base plate seat 6, the bearing 8 is sleeved on the bearing seat 7, and the crank 44 is sleeved on the bearing 8 and is installed for relative rotation with the bearing seat 7; a countersink platform 63 is provided on the handle base plate seat 6, the outer diameter of the bottom of the bearing seat 7 is larger than the middle part of the bearing seat 7, the bottom of the bearing seat 7 is sleeved on the countersink platform 63, and a circularly arranged screw hole 64 is provided between the peripheral edge of the bottom of the bearing seat 7 and the countersink platform 63, which is fixed by screws.

[0066] In this embodiment, see Figure 4 , 5 A handle base plate seat 6 with adjustable position is provided on the turntable 5, a guide rod 51 and two positioning grooves 52 are provided on the turntable 5, and a guide hole 61 and a positioning foot 62 are provided on the handle base plate seat 6; the guide hole 61 can be slidably sleeved in the guide rod 51, and the handle base plate seat 6 can be slidably adjusted along the length direction of the guide rod 51; the positioning feet 62 are provided at the lower ends of both sides of the handle base plate seat 6, the positioning feet 62 are adapted to the positioning grooves 52, slide in the positioning grooves 52, and the positioning feet 62 can be locked in the positioning grooves 52, thereby fixing the handle base plate seat 6.

[0067] In this embodiment, see Figure 5 The positioning groove 52 is a convex-shaped sliding groove, and a locking block 53 with a convex-shaped structure is embedded in the positioning groove 52. The positioning foot 62 and the locking block 53 can be locked. During the locking process, the locking block 53 is stretched upward so that the locking block 53 is clamped in the positioning groove 52 to fix the handle base plate seat 6.

[0068] In this embodiment, see Figure 5 , the handle base plate seat 6 is provided with a bearing seat 7 and a bearing 8, the bearing seat 7 is fixedly mounted on the handle base plate seat 6, the bearing 8 is sleeved on the bearing seat 7, the crank 44 is sleeved on the bearing 8, and is installed to rotate relative to the bearing seat 7; a countersink 63 is provided on the handle base plate seat 6, the outer diameter of the bottom of the bearing seat 7 is larger than the middle of the bearing seat 7, the bottom of the bearing seat 7 is sleeved on the countersink 63, and a circularly arranged screw hole 64 is provided between the peripheral edge of the bottom of the bearing seat 7 and the countersink 63, which is fixed by screws. Its structure is stable and the stroke of the lower station is easy to adjust. In the double-station embodiment, the strokes of the two lower stations can be adjusted separately to adapt to the fatigue test of air springs of different specifications at the same time; or the fatigue test comparison under different movement strokes and the same number of movements of the same air spring is adopted.

[0069] The testing method of the multi-station fatigue testing machine in this embodiment is as follows:

[0070] 1. Record the initial dimensions of the specimen (such as free height, standard air pressure);

[0071] 2. Install the sample vertically between the upper fixture 21 and the lower fixture 22, and fix the sample with a fixture to ensure that the center of the sample is consistent with the movement direction of the lower fixture, and keep it vertical during the compression process;

[0072] 3. By adjusting the guide rod 51 on the turntable 5, the eccentricity of the crank 44 is precisely adjusted to ensure that it meets the compression requirements of the corresponding sample;

[0073] 4. The upper tooling table is adjusted by driving the worm gear mechanism 31 through the top motor, and the output drives the lead screw to rise and fall to ensure the measurement accuracy of the sample;

[0074] 5. According to the test materials and test standards, set the load cycle frequency, number of cycles, and test air pressure, and adjust them through the electrical control system settings. At the same time, the display system can observe the displacement load curve, cycle number statistics, and air pressure change detection in real time. If any of the samples is abnormal (such as sudden pressure drop, abnormal displacement, abnormal load curve), the system will immediately alarm and stop the test.

[0075] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multi-station fatigue testing machine, characterized in that: include: The frame has at least two sets of slide rail structures arranged around it. The fatigue test station includes at least two sets of upper tooling tables and lower tooling tables. The number of upper tooling tables and lower tooling tables corresponds to the slide rail structure. The upper tooling tables and lower tooling tables are respectively installed on the upper and lower parts of the slide rail structure and can be lifted and lowered along the slide rail. The upper tooling drive device is arranged inside the frame, and its output end is connected to each upper tooling table to drive the lifting movement of the upper tooling table; The lower tooling drive device is arranged inside the frame, and its output end is connected to each lower tooling table to drive the lifting movement of the lower tooling table.

2. A multi-station fatigue testing machine according to claim 1, characterized in that: The upper tooling driving device comprises: An upper tooling support frame is arranged on the frame; The worm gear mechanism is installed on the upper tooling support frame; The first motor has an output end connected to a worm gear mechanism to drive the worm gear mechanism to operate; An output screw connected to the lower end of the worm gear mechanism; The upper tooling output part has a central portion that is screwed to the output lead screw and a peripheral edge that is respectively connected to the upper tooling table and moves synchronously with the upper tooling table; A plurality of guide shafts are longitudinally arranged in the frame and pass through the upper tooling output member to provide a guiding function, so that the upper tooling output member can move up and down under the drive of the output lead screw.

3. A multi-station fatigue testing machine according to claim 1, characterized in that: The tooling drive device comprises: A lower tooling support frame is arranged in the frame; The lower tooling output shaft is installed on the lower tooling support frame; The second motor is connected to the output shaft of the lower tooling through a belt drive; A pair of rotating discs are arranged at both ends of the output shaft of the lower tooling; The lower tooling output seat is installed on the slide rail structure and can move up and down; the lower tooling platform is installed on the upper part of the lower tooling output seat. A crank has one end eccentrically connected to the turntable and the other end hinged to the lower end of the output seat of the lower tooling.

4. The multi-station fatigue testing machine according to claim 2, characterized in that: An auxiliary support frame plate is arranged in the middle of the frame, and the auxiliary support frame plate and the upper tooling support frame form a frame-shaped group structure for installing the output screw rod and the guide shaft. The lower end of the guide shaft is fixed on the auxiliary support frame plate, and the output screw rod is installed in the auxiliary support frame plate through a bearing; the second height sensor is arranged on the auxiliary support frame plate, and the lower end of the guide shaft is fixed to the auxiliary support frame plate.

5. The multi-station fatigue testing machine according to claim 4, characterized in that: The upper part and the lower part of the frame are respectively provided with a first height sensor and a second height sensor for monitoring the lifting stroke of the upper tooling platform.

6. The multi-station fatigue testing machine according to claim 1, characterized in that: The upper tooling platform and / or the lower tooling platform are provided with a pressure sensor.

7. The multi-station fatigue testing machine according to claim 1, characterized in that: It also includes an electrical control system and a photoelectric display. The electrical control system is electrically connected to the first motor, the second motor, the pressure sensor and the height sensor, and is used to control motion parameters and display test data in real time.

8. The multi-station fatigue testing machine according to claim 3, characterized in that: The turntable is provided with a handle base seat with adjustable position, and the turntable is provided with a guide rod and two positioning grooves; the handle base seat is provided with a guide hole and a positioning foot; the guide hole can be slidably sleeved in the guide rod, and the handle base seat can be slidably adjusted along the length direction of the guide rod; the positioning feet are arranged at the lower ends of both sides of the handle base seat, the positioning feet are adapted to the positioning grooves, slide in the positioning grooves, and the positioning feet can be locked in the positioning grooves, thereby fixing the handle base seat.

9. A multi-station fatigue testing machine according to claim 8, characterized in that: The positioning groove is a convex-shaped sliding groove, and a locking block with a convex-shaped structure is embedded in the positioning groove. The positioning foot and the locking block can be locked. During the locking process, the locking block is stretched upward so that the locking block is clamped in the positioning groove to fix the handle base plate seat.

10. The multi-station fatigue testing machine according to claim 9, characterized in that: A bearing seat and a bearing are provided on the handle base plate seat. The bearing seat is fixedly installed on the handle base plate seat, and the bearing is sleeved on the bearing seat. The crank is sleeved on the bearing and is installed to rotate relative to the bearing seat. A countersink platform is provided on the handle base plate seat. The outer diameter of the bottom of the bearing seat is larger than the middle part of the bearing seat. The bottom of the bearing seat is sleeved on the countersink platform. Circularly arranged screw holes are provided between the peripheral edge of the bottom of the bearing seat and the countersink platform, which are fixed by screws.

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