A horizontal double-station air spring durability and stiffness comprehensive testing machine

Abstract

The invention provides a horizontal double-station air spring durability and stiffness comprehensive testing machine, comprising a frame, a swing arm frame is vertically downwardly provided on the top surface of the frame, a travel sensor is provided at the bottom end of the swing arm frame, first fixed toolings are respectively provided on both sides of the swing arm frame, second fixed toolings are respectively provided on the sides of the two first fixed toolings away from the swing arm frame, force sensors are respectively provided on the two second fixed toolings, an eccentric disk is rotatably provided on one side of the lower part of the frame, a driving mechanism capable of driving the eccentric disk to rotate is provided on the frame, a first connecting rod is rotatably provided between the eccentric disk and the lower part of the swing arm frame, and the first connecting rod is offset from the axial center of the eccentric disk, a guide rail support is provided on the frame on one side of the swing arm frame, a linear guide rail is provided on the guide rail support, a slider is provided on the linear guide rail, a second connecting rod is rotatably provided between the swing arm frame and the slider, and a displacement sensor capable of detecting the linear displacement distance of the air spring is provided on the guide rail support; the testing machine occupies a small installation area and can simultaneously meet the durability and stiffness tests of the air spring.

Description

Technical Field

[0001] The invention belongs to the field of rubber and plastic machinery, and in particular relates to a horizontal double-station air spring durability and stiffness comprehensive testing machine. Background Art

[0002] The existing air spring tester has a single function and is an independent device, which requires a lot of money and infrastructure investment. In particular, when performing durability tests and stiffness tests on air springs, air spring durability testers and air spring stiffness testers are required, which have high investment costs, large installation space, low equipment utilization, and cannot give full play to the efficiency of the equipment.

[0003] In view of this, in order to solve the above-mentioned technical problems, the present invention proposes a comprehensive testing machine that can meet the requirements of both air spring durability test and air spring stiffness test. The testing machine has a reasonable structural design, a small installation footprint, and a high utilization rate, which can reduce capital investment and give full play to the efficiency of the testing machine. Summary of the invention

[0004] The present invention provides a horizontal double-station air spring durability and stiffness comprehensive testing machine, which has a reasonable structural design, a small installation footprint, a high utilization rate, can reduce capital investment, can meet both the air spring durability test and the stiffness test requirements, and can give full play to the efficiency of the testing machine. The specific scheme is as follows:

[0005] A horizontal double-station air spring durability and stiffness comprehensive testing machine comprises a frame, a swing arm frame that can swing left and right is vertically downwardly provided in the middle of the top surface of the frame, a travel sensor is provided at the bottom end of the swing arm frame, first fixed tooling is respectively provided on both sides of the swing arm frame, and second fixed tooling opposite to the first fixed tooling is respectively provided on the frame on the side away from the swing arm frame, and force sensors that can detect the force value of the air spring are respectively provided on the second fixed tooling, an eccentric disk is rotatably provided on one side of the lower part of the frame, a driving mechanism that can drive the eccentric disk to rotate is provided on the frame, a first connecting rod is rotatably provided between the eccentric disk and the lower part of the swing arm frame, and the first connecting rod is offset from the axial center of the eccentric disk, a guide rail support is provided on the frame on one side of the swing arm frame, a linear guide rail is horizontally provided on the guide rail support, a slider is slidably provided on the linear guide rail, a second connecting rod is rotatably provided between the swing arm frame and the slider, and a displacement sensor that can detect the linear displacement distance of the air spring is also provided on the guide rail support.

[0006] Furthermore, the displacement sensor is an LVDT displacement sensor, wherein a housing of the LVDT displacement sensor is detachably disposed on a guide rail support and is disposed parallel to the linear guide rail, and a pull rod is detachably connected to a slide block.

[0007] Furthermore, the eccentric disk is provided with a fixing ring deviating from its axis, an eccentric wheel is coaxially provided inside the fixing ring, a connecting ear is circumferentially provided on the eccentric wheel, the connecting ear is located between the fixing ring and the eccentric disk, the outer periphery of the fixing ring and the eccentric disk are connected to the eccentric disk by bolts, the eccentric wheel is provided with an eccentric shaft deviating from its axis, the eccentric shaft is rotatably connected to the first connecting rod, the fixing ring is provided with scale lines along its circumference, and a fixing line that can point to the scale lines is provided on one side of the eccentric shaft on the eccentric wheel.

[0008] Furthermore, displacement mechanisms for horizontal movement of two second fixed toolings are respectively provided on the frames on both sides of the swing arm frame.

[0009] Furthermore, the displacement mechanism includes a first motor, a mounting plate, two gears, a gear bar, a screw, a fixed plate, a displacement block, a rotating shaft, a threaded barrel and two conical teeth, the first motor and the mounting plate are respectively vertically arranged on a frame away from the second fixed tooling side, the rotating shaft is horizontally rotatably arranged on the upper part of the mounting plate, the threaded barrel is horizontally rotatably arranged on the lower part of the mounting plate, the two conical teeth are respectively sleeved on the output end of the first motor and the rotating shaft, and the two conical teeth are meshed with each other, the two gears are respectively sleeved on the rotating shaft and the end of the threaded barrel away from the side of the mounting plate, the two gears are connected by a gear bar, the screw is matched and arranged in the threaded barrel, the fixed plate is vertically arranged between the mounting plate and the second fixed tooling, and the second fixed tooling is detachably connected to the fixed plate close to the first fixed tooling side, the force sensor is arranged in the middle of the side of the fixed plate away from the second fixed tooling, one end of the screw is connected to the force sensor, a slide rail is horizontally arranged on the upper part of the frame, the displacement block is slidably arranged on the slide rail, and the top of the fixed plate is connected to the displacement block.

[0010] Furthermore, an arc-shaped return block is horizontally connected to the bottom end of the swing arm frame, and the stroke sensor is arranged on the arc-shaped return block.

[0011] Furthermore, the driving mechanism includes a second motor, a transmission wheel and a transmission belt. The second motor is arranged on the frame. The transmission wheel is sleeved on the end of the output shaft of the second motor. The transmission wheel is connected to the eccentric disk through the transmission belt.

[0012] Furthermore, the first fixing tool and the second fixing tool both include a fixing plate, a mounting plate and a support rod. The left and right sides of the swing arm frame and the two fixing plates are connected with a fixing plate. The fixing plate is horizontally provided with a plurality of support rods. The mounting plate is arranged at the ends of the plurality of support rods. The mounting plate is horizontally provided with a plurality of mounting holes.

[0013] Furthermore, a base is horizontally provided at the lower part of the frame, and two bearing seats are spaced apart on the front and rear sides of the top surface of the base. A rotating shaft passes through the two bearing seats and is connected to the eccentric disk.

[0014] The beneficial effects of the present invention are:

[0015] 1. The horizontal double-station air spring durability and stiffness comprehensive testing machine of the present invention can simultaneously carry out air spring durability test and stiffness test requirements, and can also carry out separate air spring durability or stiffness test, with low investment, small installation footprint, high utilization rate, and improved test efficiency;

[0016] 2. The horizontal double-station air spring durability and stiffness comprehensive testing machine of the present invention can adjust the distance of the second fixed tooling according to actual needs to meet the installation of air springs of different sizes, so as to perform durability tests or stiffness tests, and has high practicality;

[0017] 3. The horizontal double-station air spring durability and stiffness comprehensive testing machine of the present invention can adjust the left and right swing stroke of the swing arm frame by adjusting the eccentric wheel on the eccentric disk, thereby meeting the test requirements of different samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the present invention;

[0019] Figure 2 A top view of the present invention;

[0020] Figure 3 is a side view of the present invention;

[0021] Figure 4 It is a transmission schematic diagram of the driving mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the installation of the swing arm frame, the first fixing tool, the air spring and the second fixing tool of the present invention;

[0023] Figure 6 It is a partial top view of the present invention;

[0024] Figure 7 It is a schematic diagram of the displacement mechanism of the present invention;

[0025] Figure 8 It is a front view of the connection of the guide rail support, the linear guide rail, the slider, the second connecting rod, and the displacement sensor of the present invention;

[0026] Fig. 9 It is a top view of the connection of the guide rail support, the linear guide rail, the slider, the second connecting rod, and the displacement sensor of the present invention;

[0027] Fig.10 It is a schematic diagram of the eccentric disk and its connecting parts of the present invention.

[0028] Description of reference numerals: frame 1, swing arm frame 2, first fixing fixture 3, second fixing fixture 4, force sensor 5, eccentric disk 6, fixing ring 601, bolt 602, eccentric shaft 603, scale mark 604, eccentric wheel 605, driving mechanism 7, second motor 701, transmission wheel 702, transmission belt 703, first connecting rod 8, guide rail support 9, linear guide rail 10, slider 11, second connecting rod 12, displacement sensor 13, housing 1 301, pull rod 1302, displacement mechanism 14, first motor 1401, mounting plate 1402, gear bar 1403, screw 1404, fixed plate 1405, displacement block 1406, threaded cylinder 1407, rotating shaft 1408, slide rail 15, arc return block 16, base 17, bearing seat 18, rotating shaft 19, air spring 20, stroke sensor 21, fixed plate 3401, mounting plate 3402, support rod 3403. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] See also Figure 1-10A horizontal double-station air spring durability and stiffness comprehensive testing machine includes a frame 1, a swing arm frame 2 that can swing left and right is vertically downwardly arranged in the middle of the top surface of the frame 1, wherein an axle pin is arranged along the front and rear sides of the middle of the top surface of the frame 1, and the upper end of the swing arm frame 2 is rotatably sleeved on the axle pin so that the swing arm frame 2 can swing left and right, and a stroke sensor 21 is arranged at the bottom of the swing arm frame 2, and the stroke sensor 21 can record the number of swings of the swing arm frame 2 and thus know the durability of the air spring 20, and first fixed fixtures 3 are respectively arranged on both sides of the swing arm frame 2, and second fixed fixtures 4 opposite to them are respectively arranged on the frame 1 on the side of the two first fixed fixtures 3 away from the swing arm frame 2, during the test, the air spring 20 is installed between the first fixed fixture 3 and the second fixed fixture 4, and the two second fixed fixtures 4 are respectively provided with force sensors 5 that can detect the force value of the air spring 20, wherein the force sensor 5 can display the actual test force value of the sample in real time during the test, and a rotating shaft is arranged on one side of the lower part of the frame 1 An eccentric disk 6 is provided, wherein the eccentric disk 6 adopts an eccentric disk 6 with a larger diameter. The eccentric disk 6 with a larger diameter is heavy and has a larger moment of inertia, thereby easily driving the swing arm frame 2 to swing left and right. A driving mechanism 7 that can drive the eccentric disk 6 to rotate is provided on the frame 1. A first connecting rod 8 is rotatably provided between the eccentric disk 6 and the lower part of the swing arm frame 2, and the first connecting rod 8 is offset from the axis of the eccentric disk 6. A guide rail support 9 is provided on the frame 1 on one side of the swing arm frame 2, and the guide rail support 9 is detachably arranged on the frame 1. A linear guide rail 10 is horizontally provided on the guide rail support 9, and a slider 11 is slidably provided on the linear guide rail 10. A second connecting rod 12 is rotatably provided between the swing arm frame 2 and the slider 11, wherein rod end bearings are respectively provided at both ends of the second connecting rod 12, and pins suitable for the rod end bearings are respectively provided on the swing arm frame 2 and the slider 11 to reduce the resistance during rotation. A displacement sensor 13 that can detect the linear displacement distance of the air spring 20 is also provided on the guide rail support 9.

[0031] The preferred displacement sensor 13 is an LVDT displacement sensor, wherein the housing 1301 of the LVDT displacement sensor is detachably disposed on the guide rail support 9 and is disposed parallel to the linear guide rail 10 , and the pull rod 1302 is detachably connected to the slider 11 .

[0032] The eccentric disk 6 is provided with a fixed ring 601 deviating from its axis, an eccentric wheel 605 is coaxially provided inside the fixed ring 601, a plurality of angle adjustment holes are provided on the surface of the eccentric wheel 605, a connecting ear is provided circumferentially of the eccentric wheel 605, the connecting ear is located between the fixed ring 601 and the eccentric disk 6, the outer periphery of the fixed ring 601 and the eccentric disk 6 are connected by bolts 602, wherein the bolts 602 are multiple and arranged circumferentially along the fixed ring 601, an eccentric shaft 603 deviating from its axis is provided on the eccentric wheel 605, the eccentric shaft 603 is rotatably connected to the first connecting rod 8, a scale mark 604 is provided on the fixed ring 601 along its circumference, a fixed line pointing to the scale mark 604 is provided on one side of the eccentric shaft 603 on the eccentric wheel 605, when adjusting the stroke of the swing arm frame 2, first Use professional tools to loosen the bolt 602 to loosen the fixing ring 601, so that the fixing ring 601 is away from the connecting ear on the eccentric wheel 605 to loosen and rotate, and then adjust the corresponding angle according to the required stroke, and then use professional tools to insert the angle adjustment hole to rotate the eccentric wheel 605, so that the eccentric shaft 603 and the center of the eccentric disk 6 axis are offset, thereby causing an offset distance. The specific offset distance is determined according to the stroke requirements of the swing arm frame 2, so that the scale mark 604 and the fixed line are in a straight line, and finally, the fixing ring 601 is pressed against the connecting ear and fixed on the eccentric disk 6 by the bolt 602, so that the fixing ring 601 and the eccentric wheel 605 can be fixed, so that the stroke of the swing arm frame 2 can be adjusted during the test to meet the test requirements of different samples.

[0033] The frames 1 on both sides of the swing arm frame 2 are respectively provided with displacement mechanisms 14 for horizontal movement of the two second fixing fixtures 4. The distance between the second fixing fixtures 4 can be adjusted according to actual needs to meet the installation of air springs 20 of different sizes for durability testing or stiffness testing.

[0034] The displacement mechanism 14 includes a first motor 1401, a mounting plate 1402, two gears, a gear bar 1403, a screw 1404, a fixing plate 1405, a displacement block 1406, a rotating shaft 1408, a threaded cylinder 1407 and two conical teeth. The first motor 1401 and the mounting plate 1402 are respectively arranged vertically on the frame 1 away from the side of the second fixing fixture 4, wherein the mounting plate 1402 is located on the side of the output end of the first motor 1401 and close to the side of the swing arm frame 2, and the rotating shaft 1408 is arranged horizontally on the mounting plate 1408. The threaded cylinder 1407 is horizontally rotatably arranged at the lower part of the mounting plate 1402, and the two conical teeth are respectively sleeved on the output end of the first motor 1401 and the rotating shaft 1408, and the two conical teeth are meshed with each other. The two gears are respectively sleeved on the rotating shaft 1408 and the end of the threaded cylinder 1407 on the side away from the mounting plate 1402. The two gears are connected by a gear bar 1403, and the screw 1404 is matched and arranged in the threaded cylinder 1407. The fixing plate 1405 is vertically arranged between the mounting plate 1402 and the second fixing plate 1405. The second fixing fixture 4 is detachably connected to the fixing plate 1405 near the first fixing fixture 3, the force sensor 5 is arranged in the middle of the fixing plate 1405 away from the second fixing fixture 4, one end of the screw 1404 is connected to the force sensor 5, a slide rail 15 is arranged horizontally on the upper part of the frame 1, the displacement block 1406 is slidably arranged on the slide rail 15, the top of the fixing plate 1405 is connected to the displacement block 1406, and when adjusting the spacing between the second fixing fixture 4 and the first fixing fixture 3, first start The first motor 1401 drives the rotating shaft 1408 to rotate, and drives the threaded tube 1407 to rotate through the transmission of the gear bar 1403, and then the screw rod 1404 can be displaced. The fixed plate 1405 is slidably connected to the slide rail 15 through the displacement block 1406, and the fixed plate 1405 can move forward or backward toward the first fixed fixture 3, so as to adjust the distance between the second fixed fixture 4 and the first fixed fixture 3 to meet the installation of air springs 20 of different sizes.

[0035] Preferably, the bottom end of the swing arm frame 2 is horizontally connected to an arc-shaped return block 16 , and the travel sensor 21 is arranged on the arc-shaped return block 16 .

[0036] The preferred driving mechanism 7 includes a second motor 701 , a transmission wheel 702 and a transmission belt 703 . The second motor 701 is arranged on the frame 1 , the transmission wheel 702 is sleeved on the end of the output shaft of the second motor 701 , and the transmission wheel 702 is connected to the eccentric disk 6 through the transmission belt 703 .

[0037] The first fixing fixture 3 and the second fixing fixture 4 each include a fixing plate 3401, a mounting plate 3402 and a support rod 3403. The fixing plates 3401 are connected to the left and right sides of the swing arm frame 2 and the two fixing plates 1405. The fixing plate 3401 is horizontally provided with a plurality of support rods 3403 in a circumferential direction. The mounting plate 3402 is arranged at the ends of the plurality of support rods 3403. A plurality of support rods 3403 are arranged between the fixing plate 3401 and the mounting plate 3402 to form an effective space for reserving the installation of both ends of the air spring 20. A plurality of mounting holes are horizontally opened on the mounting plate 3402, wherein the plurality of mounting holes are provided for matching the connection holes and air inlet holes of the air spring 20 with different mounting hole positions.

[0038] A base 17 is horizontally provided at the lower part of the frame 1. Two bearing seats 18 are spaced apart on the front and rear sides of the top surface of the base 17 to facilitate the stability of the eccentric disk 16. A rotating shaft 19 passes through the two bearing seats 18 and is connected to the eccentric disk 6.

[0039] The working principle of the present invention is as follows: first, the air spring 20 is installed between the two first fixing fixtures 3 and the second fixing fixture 4. During installation, the two ends of the air spring 20 are fixed to the mounting plates 3402 on both sides by screws or nuts. Then, the second motor 701 is started, and the second motor 701 drives the transmission wheel 702 to rotate, and then drives the eccentric disk 6 to rotate through the transmission belt 703. At this time, the first connecting rod 8 drives the swing arm frame 2 to swing left and right continuously under the continuous rotation of the eccentric disk 6. At this time, one of the air springs 20 is compressed and the other air spring 20 is stretched. The swing arm frame 2 swings left and right continuously to form an arc return. The travel sensor 21 on the position block 16 records the number of swings of the swing arm frame 2, and finally the data of the durability test of the air spring 20 can be obtained. At the same time, when the swing arm frame 2 swings left and right, the second connecting rod 12 connected thereto pulls the slider 11 to slide left and right along the linear guide rail 10. At this time, the pull rod 1302 of the LVDT displacement sensor moves left and right accordingly, thereby measuring the actual displacement of the compressed and stretched specimens during the test of the air spring 20. Then, the force sensor 5 is subjected to force through the compression or stretching of the air spring 20 to measure the force value. Finally, the stiffness of the air spring 20 in the test can be obtained through the actual displacement and force value.

[0040] In addition, when the installation distance needs to be adjusted for testing air springs 20 of different sizes, the two first motors 1401 are started at the same time, and the rotation of the first motor 1401 drives the rotating shaft 1408 to rotate, and the threaded cylinder 1407 is driven to rotate through the transmission of the gear bar 1403. The threaded cylinder 1407 and the screw 1404 are matched and set, and the screw 1404 can be driven to move at this time, and the fixed plate 1405 is connected to the sliding rail 15 through the displacement block 1406. The fixed plate 1405 can move forward or backward toward the first fixing tool 3, so as to adjust the distance between the two relative installation plates 3402 to meet the installation of air springs 20 of different sizes;

[0041] In addition, when adjusting the stroke of the swing arm frame 2, first use professional tools to loosen the bolts 602 to loosen the fixing ring 601, so that the eccentric wheel 605 is loose and rotatable, and then adjust the corresponding angle according to the required stroke, and then use professional tools to insert the angle adjustment hole to rotate the eccentric wheel 605, so that the eccentric shaft 603 and the center of the eccentric disk 6 axis are offset, thereby causing an offset distance. The specific offset distance is determined according to the stroke requirements of the swing arm frame 2, so that the scale mark 604 is in a straight line with the fixed line, and finally the fixing ring 601 is fixed to the eccentric disk 6 by bolts 602 to achieve the adjustment of the stroke of the swing arm frame 2 to meet the test requirements of different specimens.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A horizontal double-station air spring durability and stiffness comprehensive testing machine, characterized by: The invention comprises a frame (1), wherein a swing arm frame (2) capable of swinging left and right is vertically downwardly provided in the middle of the top surface of the frame (1), a travel sensor (21) is provided at the bottom end of the swing arm frame (2), first fixing fixtures (3) are respectively provided on both sides of the swing arm frame (2), and second fixing fixtures (4) opposite to the first fixing fixtures (3) are respectively provided on the frame (1) on the side away from the swing arm frame (2), and force value sensors capable of detecting the force value of an air spring (20) are respectively provided on the second fixing fixtures (4). The sensor (5) comprises an eccentric disk (6) rotatably provided on one side of the lower part of the frame (1), a driving mechanism (7) capable of driving the eccentric disk (6) to rotate is provided on the frame (1), a first connecting rod (8) rotatably provided between the eccentric disk (6) and the lower part of the swing arm frame (2), and the axis of the first connecting rod (8) and the eccentric disk (6) are offset, a guide rail support (9) is provided on the frame (1) on one side of the swing arm frame (2), a linear guide rail (10) is horizontally provided on the guide rail support (9), and the linear guide rail (10) is provided on the frame (1) on one side of the swing arm frame (2). A slider (11) is slidably provided on the guide rail (10), a second connecting rod (12) is rotatably provided between the swing arm frame (2) and the slider (11), a displacement sensor (13) capable of detecting the linear displacement distance of the air spring (20) is also provided on the guide rail support (9), a fixing ring (601) deviating from its axis is provided on the eccentric disk (6), an eccentric wheel (605) is coaxially provided inside the fixing ring (601), and a connecting ear is circumferentially provided on the eccentric wheel (605), and the connecting ear is located at the fixing ring (601). The fixed ring (601) and the eccentric disk (6) are connected by bolts (602) between the outer periphery of the fixed ring (601) and the eccentric disk (6); the eccentric wheel (605) is provided with an eccentric shaft (603) deviating from its axis; the eccentric shaft (603) is rotatably connected to the first connecting rod (8); the fixed ring (601) is provided with scale markings (604) along its circumference; and a fixed line that can point to the scale markings (604) is provided on one side of the eccentric shaft (603) on the eccentric wheel (605).

2. The horizontal double-station air spring durability and stiffness comprehensive testing machine according to claim 1 is characterized by: The displacement sensor (13) is an LVDT displacement sensor, wherein a housing (1301) of the LVDT displacement sensor is detachably arranged on a guide rail support (9) and is arranged parallel to the linear guide rail (10), and a pull rod (1302) is detachably connected to a slider (11).

3. The horizontal double-station air spring durability and stiffness comprehensive testing machine according to claim 1 is characterized by: The frames (1) on both sides of the swing arm frame (2) are respectively provided with displacement mechanisms (14) for horizontal movement of the two second fixed toolings (4).

4. The horizontal double-station air spring durability and stiffness comprehensive testing machine according to claim 3 is characterized by: The displacement mechanism (14) comprises a first motor (1401), a mounting plate (1402), two gears, a gear bar (1403), a screw (1404), a fixing plate (1405), a displacement block (1406), a rotating shaft (1408), a threaded barrel (1407) and two conical teeth. The first motor (1401) and the mounting plate (1402) are respectively arranged vertically on a frame (1) away from a side of the second fixing fixture (4). The rotating shaft (1408) is arranged horizontally and rotatably on an upper portion of the mounting plate (1402). The threaded barrel (1407) is arranged horizontally and rotatably on a lower portion of the mounting plate (1402). The two conical teeth are respectively sleeved on an output end of the first motor (1401) and the rotating shaft (1408), and the two conical teeth are meshed with each other. The two gears are respectively sleeved on the rotating shaft away from a side of the mounting plate (1402). (1408) and the end of the threaded tube (1407), the two gears are connected by a gear bar (1403), the screw rod (1404) is matched and arranged in the threaded tube (1407), the fixed plate (1405) is vertically arranged between the mounting plate (1402) and the second fixed fixture (4), and the second fixed fixture (4) is detachably connected to the fixed plate (1405) close to the side of the first fixed fixture (3), the force sensor (5) is arranged in the middle of the side of the fixed plate (1405) away from the second fixed fixture (4), one end of the screw rod (1404) is connected to the force sensor (5), a slide rail (15) is horizontally arranged on the upper part of the frame (1), the displacement block (1406) is slidably arranged on the slide rail (15), and the top of the fixed plate (1405) is connected to the displacement block (1406).

5. The horizontal double-station air spring durability and stiffness comprehensive testing machine according to claim 1 is characterized by: The bottom end of the swing arm frame (2) is horizontally connected to an arc-shaped return block (16), and the travel sensor (21) is arranged on the arc-shaped return block (16).

6. The horizontal double-station air spring durability and stiffness comprehensive testing machine according to claim 1 is characterized by: The driving mechanism (7) comprises a second motor (701), a transmission wheel (702) and a transmission belt (703); the second motor (701) is arranged on the frame (1); the transmission wheel (702) is sleeved on the end of the output shaft of the second motor (701); and the transmission wheel (702) is connected to the eccentric disc (6) via the transmission belt (703).

7. The horizontal double-station air spring durability and stiffness comprehensive testing machine according to claim 4 is characterized by: The first fixing fixture (3) and the second fixing fixture (4) both comprise a fixing plate (3401), a mounting plate (3402) and a support rod (3403); the fixing plates (3401) are connected to the left and right sides of the swing arm frame (2) and the two fixing plates (1405); the fixing plates (3401) are horizontally provided with a plurality of support rods (3403) in a circumferential direction; the mounting plates (3402) are arranged at the ends of the plurality of support rods (3403); and the mounting plates (3402) are horizontally provided with a plurality of mounting holes.

8. The horizontal double-station air spring durability and stiffness comprehensive testing machine according to claim 1 is characterized by: A base (17) is horizontally disposed at the lower part of the frame (1), and two bearing seats (18) are spaced apart on the front and rear sides of the top surface of the base (17). A rotating shaft (19) passes through the two bearing seats (18) and is connected to the eccentric disk (6).

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