A multi-station fatigue testing machine

Abstract

This invention relates to a multi-station fatigue testing machine, comprising: a frame with at least two sets of slide rail structures arranged around its perimeter; fatigue testing stations, including at least two sets of upper and lower fixtures, the number of which corresponds to the slide rail structures, and are respectively installed on the upper and lower parts of the slide rail structures and capable of lifting and lowering along the slide rails; an upper fixture drive device, disposed inside the frame, with its output end connected to each upper fixture for driving the lifting and lowering movement of the upper fixtures; and a lower fixture drive device, disposed inside the frame, with its output end connected to each lower fixture for driving the lifting and lowering movement of the lower fixtures. The machine performs testing at multiple stations, improving testing efficiency.

Description

Technical Field

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

[0002] With increasing global demand for environmental protection and energy conservation, traditional automotive deceleration systems (such as mechanical braking systems) have many shortcomings in terms of energy consumption, cost, and performance. Air springs, as a new type of deceleration technology, are gradually gaining attention due to their advantages such as lightweight design, high efficiency, and safety, as the market increasingly demands higher levels of comfort, durability, and safety in vehicles.

[0003] As a key component of vehicle suspension systems, air springs are subjected to complex cyclic loads in actual use. The repeated application of these loads often leads to fatigue in the air spring materials, affecting their performance and lifespan. Traditional fatigue testing machines suffer from insufficient testing accuracy, low station utilization, and high testing costs when performing fatigue tests on air springs. There is a need for a fatigue testing machine that is simple in structure, stable in operation, capable of performing various forms of fatigue testing, and offers additional workstations to meet market demands for fatigue testing of air springs and similar components. Summary of the Invention

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

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

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

[0007] The fatigue testing station includes at least two sets of upper and lower tooling tables. The number of upper and lower tooling tables corresponds to the slide rail structure. They are installed on the upper and lower parts of the slide rail structure respectively and can move up and down along the slide rail.

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

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

[0010] Preferably, the upper tooling drive device includes:

[0011] The upper tooling support frame is mounted on the machine frame;

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

[0013] The first motor has its output end connected to a worm gear mechanism to drive the worm gear mechanism to rotate.

[0014] The output lead screw is connected to the lower end of the worm gear mechanism;

[0015] The upper tooling output component is screwed to the output screw in the middle and connected to the upper tooling table around its periphery, moving synchronously with the upper tooling table.

[0016] Multiple guide shafts are longitudinally arranged inside the frame and pass through the upper tooling output component to provide guidance, so that the upper tooling output component moves up and down under the drive of the output screw.

[0017] Preferably, the lower tooling drive device includes:

[0018] The lower tooling support frame is installed inside the machine frame;

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

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

[0021] A pair of turntables are positioned at both ends of the lower tooling output shaft;

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

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

[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 assembly structure for installing the output lead screw and the guide shaft. The lower end of the guide shaft is fixed to the auxiliary support frame plate, and the output lead screw is installed in the auxiliary support frame plate through a bearing. The second height sensor is provided 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 and lower parts of the frame are respectively equipped with a first height sensor and a second height sensor to monitor the lifting stroke of the upper tooling table.

[0026] Preferably, pressure sensors are provided on the upper and / or lower tooling tables.

[0027] Preferably, the system 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.

[0028] Preferably, the turntable is provided with an adjustable handle base plate seat, the turntable is provided with a guide rod and two positioning grooves; the handle base plate seat is provided with a guide hole and positioning feet; the guide hole is slidably fitted into the guide rod, and the handle base plate seat can slide and adjust along the length direction of the guide rod; the positioning feet are provided at the lower ends of both sides of the handle base plate 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 plate seat.

[0029] Preferably, the positioning groove is a U-shaped sliding groove, and a U-shaped locking block is embedded in the positioning groove. The positioning foot and the locking block can be locked together. During the locking process, the locking block is pulled upward to lock the locking block in the positioning groove, thereby fixing the handle base plate seat.

[0030] Preferably, the handle base plate is provided with a bearing seat and a bearing. The bearing seat is fixedly installed on the handle base plate, and the bearing is sleeved on the bearing seat. The crank is sleeved on the bearing and is rotatably installed relative to the bearing seat. The handle base plate is provided with a countersunk platform. The outer diameter of the bottom of the bearing seat is larger than that of the middle part of the bearing seat. The bottom of the bearing seat is sleeved on the countersunk platform. There are annularly arranged screw holes between the bottom periphery of the bearing seat and the countersunk platform, which are fixed by screws.

[0031] The beneficial effects of this invention are: a multi-station fatigue testing machine that can perform tests at multiple stations simultaneously, operates stably, and whose motion patterns / modes for the upper and lower stations can be set independently. The upper station's motion pattern is set via a motor, while the lower station's stroke can be manually adjusted; this multifunctional fatigue testing machine can perform various forms of fatigue testing to meet market demand for fatigue testing of air springs and similar components. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 This is a schematic diagram of the overall structure of the multi-station fatigue testing machine described in this invention;

[0034] Figure 2 This is a side view of the multi-station fatigue testing machine described in this invention.

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

[0036] Figure 4 This is a schematic diagram of the turntable structure of the multi-station fatigue testing machine described in this invention;

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

[0038] Figure Descriptions: 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 component; 35. Guide shaft; 4. Lower tooling support frame; 41. Lower tooling output shaft; 42. Second motor; 421. Gearbox; 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. Countersunk hole platform; 64. Screw hole; 7. Bearing seat; 8. Bearing. Detailed Implementation

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

[0040] like Figure 1-3 The multi-station fatigue testing machine shown has at least two sets of slide rail structures 11 on both sides of the frame 1. The slide rail structures 11 are equipped with fatigue testing stations, and multiple stations can work simultaneously to improve testing efficiency.

[0041] It consists of a frame 1, a fatigue testing 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 provided around the frame 1, arranged symmetrically.

[0043] The fatigue testing station includes multiple upper fixtures 21 and lower fixtures 22. The number of upper fixtures 21 and lower fixtures 22 corresponds to the number of slide rail structures 11. They are installed on the upper and lower parts of the slide rail structures 11 respectively and can move up and down along the slide rail to repeatedly compress the air spring for fatigue testing.

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

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

[0046] An upper tooling support frame 3 is provided 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 is connected to the worm gear mechanism 31 at its output end to drive the worm gear mechanism 31 to rotate; an output screw 33 is connected to the lower end of the worm gear mechanism 31; an upper tooling output component 34 is screwed to the output screw 33 at its middle part and connected to the upper tooling table 21 at its periphery, and moves synchronously with the upper tooling table 21; multiple guide shafts 35 are arranged longitudinally in the frame 1 and pass through the upper tooling output component 34 to provide guidance, so that it can only move up and down, and the upper tooling output component 34 moves up and down under the drive of the output screw 33.

[0047] In this embodiment, the lower tooling drive device comprises: 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 installed below the frame 1; a lower tooling output shaft 41 is mounted on the lower tooling support frame 4; a second motor 42 is connected to the lower tooling output shaft 41 via belt drive; a pair of turntables 5 are located at both ends of the lower tooling output shaft 41; a lower tooling output seat 43 is mounted on the slide rail structure 11 and can move up and down; a lower tooling table 22 is mounted on the upper part of the lower tooling output seat 43. A crank 44 is eccentrically connected at one end to the turntable 5 and hinged at the lower end of the lower tooling output seat 43.

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

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

[0051] In one embodiment, slide rail structures 11 are symmetrically arranged on both sides of the frame 1 of the frame structure. The slide rail structures 11 are equipped with fatigue testing stations, forming a symmetrical structure. The two stations work simultaneously, improving testing efficiency.

[0052] An auxiliary support frame plate is provided in the middle of the frame 1. The auxiliary support frame plate and the upper tooling support frame 3 form a frame-shaped assembly structure with an upper and lower structure. It is used to install the output lead screw and the guide shaft 35. The lower end of the guide shaft 35 is fixed to the auxiliary support frame plate. The output lead screw is installed in the auxiliary support frame plate through the bearing 8. The second height sensor 13 is set on the auxiliary support frame plate. The lower end of the guide shaft 35 is fixed to the auxiliary support frame plate.

[0053] The upper and lower parts of the frame 1 are respectively equipped with a first height sensor 12 and a second height sensor 13, which are used to monitor the lifting stroke of the upper tooling table 21 so as to limit the lifting stroke height of the upper tooling table 21 as required.

[0054] Pressure sensors 14 are installed on the upper fixture 21 and / or the lower fixture 22 to record and provide feedback on the pressure during fatigue testing.

[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, and is used to control motion parameters and display test data in real time.

[0056] The sensor also includes a count sensor, installed inside the turntable 5, which provides accurate count data of the number of compression cycles of the lower tooling support frame in real time. The count sensor, height sensor, and pressure sensor 14 work together 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 on the display.

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

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

[0059] The guide hole 61 can be slidably fitted inside the guide rod 51; the handle base plate 6 can be slidably adjusted along the length of the guide rod 51.

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

[0061] In one embodiment, the positioning groove 52 is a convex-shaped groove with a convex-shaped cross-section.

[0062] The positioning groove 52 is embedded with a locking block 53, which is also convex in shape. The positioning foot 62 and the locking block 53 can be locked together. During the locking process, the locking block 53 is pulled upward so that the locking block 53 is locked in the positioning groove 52, thereby fixing the handle base plate 6.

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

[0064] In one embodiment, the position is locked by a pin passing 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 The handle base plate 6 is provided with a bearing seat 7 and a bearing 8. The bearing seat 7 is fixedly installed on the handle base plate 6, and the bearing 8 is sleeved on the bearing seat 7. The crank 44 is sleeved on the bearing 8 and is rotatably installed relative to the bearing seat 7. The handle base plate 6 is provided with a countersunk platform 63. The outer diameter of the bottom of the bearing seat 7 is larger than that of the middle part of the bearing seat 7. The bottom of the bearing seat 7 is sleeved on the countersunk platform 63. There are annularly arranged screw holes 64 between the bottom periphery of the bearing seat 7 and the countersunk platform 63, which are fixed by screws.

[0066] In this embodiment, see Figure 4 , 5 The turntable 5 is provided with an adjustable handle base plate 6. The turntable 5 is provided with a guide rod 51 and two positioning grooves 52. The handle base plate 6 is provided with a guide hole 61 and a positioning foot 62. The guide hole 61 can be slidably fitted into the guide rod 51, and the handle base plate 6 can be slidably adjusted along the length of the guide rod 51. The positioning foot 62 is provided at the lower ends of both sides of the handle base plate 6. The positioning foot 62 is adapted to the positioning groove 52 and slides in the positioning groove 52. The positioning foot 62 can be locked in the positioning groove 52, thereby fixing the handle base plate 6.

[0067] In this embodiment, see Figure 5 The positioning groove 52 is a convex sliding groove, and a convex locking block 53 is embedded in the positioning groove 52. The positioning foot 62 and the locking block 53 can be locked together. During the locking process, the locking block 53 is pulled upward to lock the locking block 53 in the positioning groove 52, thereby fixing the handle base plate 6.

[0068] In this embodiment, see Figure 5 The handle base plate 6 is provided with a bearing seat 7 and a bearing 8. The bearing seat 7 is fixedly installed on the handle base plate 6, and the bearing 8 is sleeved on the bearing seat 7. The crank 44 is sleeved on the bearing 8 and is rotatably installed relative to the bearing seat 7. The handle base plate 6 is provided with a countersunk platform 63. The outer diameter of the bottom of the bearing seat 7 is larger than that of the middle part of the bearing seat 7. The bottom of the bearing seat 7 is sleeved on the countersunk platform 63. There are annularly arranged screw holes 64 between the bottom periphery of the bearing seat 7 and the countersunk platform 63, which are fixed by screws. Its structure is stable and the lower station stroke is easy to adjust. In the dual-station embodiment, the strokes of the two lower stations can be adjusted separately to accommodate fatigue tests of air springs of different specifications at the same time; or to compare fatigue tests of the same air spring using different strokes and the same number of strokes.

[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 sample (e.g., free height, standard air pressure);

[0071] 2. The sample is vertically installed between the upper fixture 21 and the lower fixture 22. The sample is fixed with a fixture to ensure that the center of the sample is in the same direction of movement as the lower fixture and that it remains vertical during compression.

[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 the top motor driving the worm gear mechanism 31, which in turn drives the lead screw to lift and adjust, ensuring the accuracy of sample measurement;

[0074] 5. Based on the test materials and testing standards, set the following parameters: load cycle frequency, number of cycles, and test air pressure. Adjust these parameters through the electrical control system. Simultaneously, the system displays the displacement-load curve, cycle count statistics, and air pressure change detection in real time. If any sample exhibits an abnormality (such as a sudden pressure drop, abnormal displacement, or abnormal load curve), the system will immediately alarm and stop the test.

[0075] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but 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 around its perimeter. The fatigue testing station includes at least two sets of upper and lower tooling tables. The number of upper and lower tooling tables corresponds to the slide rail structure. They are installed on the upper and lower parts of the slide rail structure respectively and can move up and down along the slide rail. The upper tooling drive device is located inside the frame, and its output end is connected to each upper tooling table to drive the lifting and lowering movement of the upper tooling table. The lower tooling drive device is located inside the frame, and its output end is connected to each lower tooling table to drive the lifting and lowering movement of the lower tooling table. The upper tooling drive device includes: The upper tooling support frame is mounted on the machine frame; The worm gear mechanism is mounted on the upper tooling support frame; The first motor has its output end connected to a worm gear mechanism to drive the worm gear mechanism to rotate. The output lead screw is connected to the lower end of the worm gear mechanism; The upper tooling output component is screwed to the output lead screw in the middle and connected to the upper tooling table around its periphery, moving synchronously with the upper tooling table; Multiple guide shafts are longitudinally arranged inside the frame and pass through the upper tooling output component to provide guidance, so that the upper tooling output component moves up and down under the drive of the output screw; The lower tooling drive device includes: The lower tooling support frame is installed inside the machine frame; The lower tooling output shaft is mounted on the lower tooling support frame; The second motor is connected to the output shaft of the lower tooling via belt drive; A pair of turntables are positioned at both ends of the lower tooling output shaft; The lower tooling output seat is mounted on the slide rail structure and can move up and down; the lower tooling table is mounted on the upper part of the lower tooling output seat. A crank is eccentrically connected to a turntable at one end and hinged to the lower end of the lower tooling output seat at the other end. An auxiliary support frame plate is provided in the middle of the frame, forming a frame-shaped assembly structure with the upper tooling support frame for installing the output screw and guide shaft. The lower end of the guide shaft is fixed to the auxiliary support frame plate, and the output screw is installed in the auxiliary support frame plate through a bearing. A second height sensor is provided on the auxiliary support frame plate, and the lower end of the guide shaft is fixed to the auxiliary support frame plate. A first height sensor and a second height sensor are respectively provided in the upper and lower parts of the frame for monitoring the lifting stroke of the upper tooling table. The turntable is provided with an adjustable handle base plate seat, and the turntable is provided with a guide rod and two positioning grooves; the handle base plate seat is provided with a guide hole and positioning feet; the guide hole can be slidably fitted into the guide rod, and the handle base plate seat can be slidably adjusted along the length direction of the guide rod; the positioning feet are located at the lower ends of both sides of the handle base plate 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 plate seat.

2. The multi-station fatigue testing machine according to claim 1, characterized in that, Pressure sensors are installed on the upper tooling table and / or the lower tooling table.

3. 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.

4. The multi-station fatigue testing machine according to claim 1, characterized in that: The positioning groove is a convex-shaped sliding groove, and a convex-shaped locking block is embedded in the positioning groove. The positioning foot and the locking block can be locked together. During the locking process, the locking block is pulled upward to lock the locking block in the positioning groove, thereby fixing the handle base plate seat.

5. A multi-station fatigue testing machine according to claim 4, characterized in that: The handle base plate is provided with a bearing seat and a bearing. The bearing seat is fixedly installed on the handle base plate, and the bearing is sleeved on the bearing seat. The crank is sleeved on the bearing and is rotatably installed relative to the bearing seat. The handle base plate is provided with a countersunk platform. The outer diameter of the bottom of the bearing seat is larger than that of the middle part of the bearing seat. The bottom of the bearing seat is sleeved on the countersunk platform. There are annularly arranged screw holes between the bottom periphery of the bearing seat and the countersunk platform, which are fixed by screws.

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