A vertical load loading test device and loading method

Abstract

A vertical load loading test device, belonging to the automotive field, includes: a hydraulic cylinder support with a slide rail on the side and a lifting device at the top; a horizontal hydraulic cylinder, located at the bottom of the hydraulic cylinder support, capable of rising or falling along the slide rail; a gantry frame; a first bearing pulley; a second bearing pulley; a third bearing pulley; a second connecting seat, the lower part of which is fixed to a linear slider bearing; a linear guide rail, the upper end of which is connected to a lifting ring, the lifting ring being connected to the lifting ring at the first connecting rod via a steel wire rope passing through the third bearing pulley, a steel wire rope through-hole, the second bearing pulley, and the first bearing pulley; and a load sensor, the lower end of which is sequentially equipped with a second connecting rod, a U-shaped seat, and a fisheye joint bearing, with a fastening bolt on one side of the U-shaped seat. This invention not only enables accurate application of vertical tensile loads using a horizontal hydraulic cylinder during automotive suspension system testing, eliminating the need for frequent disassembly and reassembly of the hydraulic cylinder on the gantry frame, but also offers simple operation and easy control, making it worthy of widespread adoption in the industry.

Description

Technical Field

[0001] This invention relates to the field of bench testing technology for automotive suspension systems, and in particular to a vertical load loading test device and loading method. Background Technology

[0002] The automotive suspension system is a crucial assembly within the vehicle's chassis system, elastically connecting the frame and wheels and influencing various performance characteristics of the vehicle. Its function is to transmit forces and torques between the wheels and the frame, while simultaneously cushioning impacts from uneven road surfaces, reducing vibrations and ensuring a smooth ride. The suspension system is subjected to forces during driving, and its structure and design affect the vehicle's handling and comfort. The reliability of the suspension system directly impacts the vehicle's normal operation and the safety of its occupants, especially since it is subjected to varying impacts and fatigue loads during driving. Therefore, the strength, fatigue resistance, and other mechanical properties of the suspension system require higher standards. Thus, one of the most important tasks during the product development cycle is ensuring that the fatigue life and strength of the automotive suspension system meet the demands of various operating conditions.

[0003] With the accelerated development of various vehicle models and the increasingly shorter R&D cycles, continuously strengthening the R&D efforts in automotive suspension system testing and improving the overall mechanical performance of automotive suspension systems to meet the needs of various road conditions has become an urgent requirement for the development of the automotive industry.

[0004] The primary tests and verifications conducted by OEMs on automotive suspension systems are fatigue and strength tests. Both fatigue and strength tests require the suspension system to be subjected to full load. This is typically done using one or two hydraulic cylinders suspended on a gantry to apply vertical static or dynamic loads to one or both sides of the suspension; these vertical loads are always upward tensile loads. It's common for multiple automotive suspension test benches to operate simultaneously, leading to a shortage of hydraulic cylinders on the gantry, as most cylinders are horizontally positioned. After completing the relevant tests on the automotive suspension using horizontally positioned hydraulic cylinders suspended on the gantry, they need to be removed to conduct horizontal tests on other test samples. Clearly, current automotive suspension system testing methods either suffer from a shortage of test benches or are overly cumbersome in their operation.

[0005] Therefore, in view of the problems existing in the prior art, the designer of this invention, based on years of experience in this industry, actively researched and improved the technology, and thus came up with the present invention: a vertical load loading test device and loading method. Summary of the Invention

[0006] The first objective of this invention is to provide a vertical load loading test device to address the shortcomings of existing technologies, such as a shortage of automotive suspension test benches or overly cumbersome operation processes in the testing and inspection of automotive suspension systems.

[0007] The second objective of this invention is to provide a vertical load application method to address the shortcomings of existing technologies, such as a shortage of automotive suspension test benches or overly cumbersome operation procedures in the testing and inspection of automotive suspension systems.

[0008] To achieve the first objective of this invention, the present invention provides a vertical load loading test device, the vertical load loading test device comprising:

[0009] The hydraulic cylinder support has a slide rail arranged vertically on the side and a lifting device with a worm gear mechanism and a handwheel at the top.

[0010] A horizontal hydraulic cylinder is installed at the bottom of the hydraulic cylinder support and can rise or fall along the slide under the action of the lifting device. The telescopic end of the horizontal hydraulic cylinder is fixedly connected to the lifting ring through the first connecting rod.

[0011] The gantry frame consists of columns and beams, arranged in a gate shape, and fixed to the foundation by a base.

[0012] The first bearing pulley is disposed at the bottom of the column and further includes a first base fixed to the column by fastening bolts, a first pulley support hinged to the first base by a pin, and a first pulley movably connected to the first pulley support by a pulley pin with a nut.

[0013] The second bearing pulley is set on the top of the column and further includes a first connecting seat fixed to the column by fastening bolts, a second pulley support fixed to the first connecting seat by fastening bolts and stacked on top of each other, and a second pulley movably connected to the second pulley support by a pulley pin with a nut. A wire rope through hole is provided at the same height as the inner edge of the column and the second pulley.

[0014] The third bearing pulley is located in the middle of the crossbeam and further includes a third pulley support fixed to the crossbeam by fastening bolts, and a third pulley movably connected to the third pulley support by a pulley pin with a nut.

[0015] The second connecting seat is in the shape of an I-beam and includes a first steel plate facing each other and a second steel plate disposed between the first steel plates. The upper part of the first steel plate is fixed to the crossbeam by fastening bolts, and the lower part of the second steel plate is fixed to the linear slider bearing by fastening bolts. The linear slider bearing has an intermediate slide.

[0016] A linear guide rail is set in the middle slide of the linear slider bearing. The upper end of the linear guide rail is fixedly connected to a lifting ring with a washer. A wrench space is set at the lower end of the linear guide rail. The lifting ring at the linear guide rail is connected to the lifting ring at the first connecting rod by passing through the third bearing pulley, the wire rope through hole, the second bearing pulley, and the first bearing pulley in sequence via a steel wire rope. A fisheye joint bearing is set at the U-shaped opening of the U-shaped seat, and a second connecting rod is set at the tail end of the fisheye joint bearing.

[0017] A load sensor is located at the end of the second connecting rod that is different from the linear guide rail. The lower end of the load sensor is provided with the second connecting rod, the U-shaped seat, and the fisheye spherical bearing located at the U-shaped opening of the U-shaped seat. A fastening bolt for connecting the test fixture is provided on the side of the U-shaped seat that is different from the load sensor.

[0018] Optionally, the uprights and beams of the gantry frame can be made of square hollow steel.

[0019] Optionally, reinforcing steel pipes are installed at intervals inside the columns and beams of the gantry frame.

[0020] Optionally, fastening bolt through holes are provided in pairs at different heights at the bottom of the column to adjust the height of the first base.

[0021] To achieve the second objective of this invention, this invention provides a loading method for a vertical load loading test device, the loading method comprising:

[0022] Perform step S1: Secure the vehicle suspension system and its fixing clamps to the test platform using a quick-release plate;

[0023] Execute step S2: Connect the fastening bolt on the side of the U-shaped seat opposite to the load sensor to the loading arm of the vehicle suspension system and its fixing clamp;

[0024] Perform step S3: Adjust the second connecting rod to be perpendicular to the test platform;

[0025] Perform step S4: Adjust the first base to the preset loading height and fix it;

[0026] Perform step S5: Rotate the first pulley support to adjust it to the preset loading position of the horizontal hydraulic cylinder;

[0027] Execution step S6: Adjust the horizontal hydraulic cylinder along the slide to the preset loading height by using the lifting device, so that the wire rope on the lifting ring at the first connecting rod of the horizontal hydraulic cylinder is horizontal;

[0028] Perform step S7: Extend the piston rod of the horizontal hydraulic cylinder so that the retraction stroke of the piston rod of the horizontal hydraulic cylinder meets the test requirements;

[0029] Execute step S8: retract the piston rod of the horizontal hydraulic cylinder, and pull the loading arm through the wire rope until the wheel center reaches the initial position required by the test.

[0030] Step S9: The test software controls two horizontal hydraulic cylinders to apply tensile loads according to the loading requirements.

[0031] Optionally, the initial position is the fully loaded position.

[0032] Optionally, the load phase difference between the two sides of the vehicle suspension system and its fixing clamp is 180°, so that the loading arms on both sides of the vehicle suspension system and its fixing clamp alternately move up and down for the same stroke.

[0033] In summary, the vertical load loading test equipment of the present invention can accurately apply vertical tensile loads using horizontal hydraulic cylinders during automotive suspension system testing without frequent disassembly and reassembly of the hydraulic cylinders on the gantry. Moreover, it is simple to operate and easy to control, making it worthy of widespread use in the industry. Attached Figure Description

[0034] Figure 1 The diagram shown is a schematic diagram of the vertical load loading test equipment of the present invention.

[0035] Figure 2 The diagram shows the first bearing pulley at the bottom of the gantry column of the vertical load loading test equipment of the present invention.

[0036] Figure 3 The diagram shows the second bearing pulley at the top of the gantry column of the vertical load loading test equipment of the present invention;

[0037] Figure 4 The diagram shows a through hole for the steel wire rope at the top of the gantry column of the vertical load loading test equipment of the present invention.

[0038] Figure 5 The diagram shows the third bearing pulley in the middle of the crossbeam of the vertical load loading test device of the present invention;

[0039] Figure 6 The diagram shows an application schematic of the vertical load loading test equipment of the present invention. Specific Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] Please see Figures 1-5, Figure 1 The diagram shown is a schematic diagram of the vertical load loading test equipment of the present invention. Figure 2 The diagram shows the first bearing pulley at the bottom of the gantry column of the vertical load loading test equipment of the present invention. Figure 3 The diagram shows the second bearing pulley at the top of the gantry column of the vertical load loading test equipment of the present invention. Figure 4 The diagram shown is a schematic diagram of the wire rope through hole at the top of the gantry column of the vertical load loading test equipment of the present invention. Figure 5 The diagram shows the third bearing pulley in the middle of the crossbeam of the vertical load loading test device of the present invention. The vertical load loading test device includes:

[0042] A hydraulic cylinder support 1 is provided with a slide rail 11 vertically arranged on the side of the hydraulic cylinder support 1, and a lifting device 14 with a worm gear mechanism 12 and a handwheel 13 is provided at the top of the hydraulic cylinder support 1.

[0043] A horizontal hydraulic cylinder 2 is located at the bottom of the hydraulic cylinder support 1 and can rise or fall along the slide rail 11 under the action of the lifting device 14. The telescopic end of the horizontal hydraulic cylinder 2 is fixedly connected to the lifting ring 22 through the first connecting rod 21.

[0044] The gantry frame 3 is composed of columns 31 and beams 32. The columns 31 and beams 32 are arranged in a gate shape and are fixed to the foundation by the base 33.

[0045] The first bearing pulley 4 is disposed at the bottom of the column 31 and further includes a first base 41 fixed to the column 31 by fastening bolts 40, a first pulley support 43 hinged to the first base 41 by pins 42, and a first pulley 46 movably connected to the first pulley support 43 by a pulley pin 45 having a nut 44.

[0046] The second bearing pulley 5 is disposed on the top of the column 31 and further includes a first connecting seat 51 fixed to the column 31 by fastening bolts 40, a second pulley support 52 fixed to the first connecting seat 51 by fastening bolts 40 and stacked vertically, and a second pulley 53 movably connected to the second pulley support 52 by a pulley pin 45 with a nut 44. The inner edges of the column 31 and the second pulley 53 are provided with wire rope through holes 54 at the same height.

[0047] The third bearing pulley 6 is disposed in the middle of the crossbeam 32, and further includes a third pulley support 61 fixed to the crossbeam 32 by fastening bolts 40, and a third pulley 62 movably connected to the third pulley support 61 by a pulley pin 45 having a nut 44.

[0048] The second connecting seat 7 is in the shape of an I-beam and includes a first steel plate 71 facing each other and a second steel plate 72 disposed between the first steel plate 71. The upper part of the first steel plate 71 is fixed to the crossbeam 32 by fastening bolts 40, and the lower part of the second steel plate 72 is fixed to the linear slider bearing 73 by fastening bolts 40. The linear slider bearing 73 has a middle slide.

[0049] A linear guide rail 8 is provided in the middle slide of the linear slider bearing 73. The upper end of the linear guide rail 8 is fixedly connected to the lifting ring 22 through which the washer 74 passes. The lower end of the linear guide rail 8 is provided with a wrench space 81. The wrench space 81 facilitates the fastening of the linear guide rail 8 and the lifting ring 22, as well as the linear guide rail 8 and the U-shaped seat 82 located at the lower end of the linear guide rail 8. The lifting ring 22 at the linear guide rail 8 is connected to the lifting ring 22 at the first connecting rod 21 by passing through the third bearing pulley 6, the wire rope through hole 54, the second bearing pulley 5, and the first bearing pulley 4 in sequence via a steel wire rope 23. A fisheye joint bearing 83 is provided at the U-shaped opening of the U-shaped seat 82, and a second connecting rod 84 is provided at the tail end of the fisheye joint bearing 83.

[0050] A load sensor 9 is disposed at one end of the second connecting rod 84 that is different from the linear guide rail 8. The lower end of the load sensor 9 is provided with the second connecting rod 84, a U-shaped seat 82, and a fisheye joint bearing 83 located at the U-shaped opening of the U-shaped seat 82. A fastening bolt 40 for connecting the test fixture is disposed on the side of the U-shaped seat 82 that is different from the load sensor 9.

[0051] Please continue reading. Figure 1 As a specific implementation, in order to reduce weight and save costs, the uprights 31 and crossbeams 32 of the gantry frame 3 can be made of square hollow steel. To prevent the uprights 31 and crossbeams 32 of the gantry frame 3 from deforming under the action of the fastening bolts 40, preferably, reinforcing steel pipes 34 are spaced apart inside the uprights 31 and crossbeams 32 of the gantry frame 3. In order to match the lifting device 14 of the hydraulic cylinder support 1, fastening bolt through holes 47 are provided in pairs at different heights at the bottom of the uprights 31 to adjust the height of the first base 41.

[0052] As will be readily understood by those skilled in the art, the first pulley support 43 and the first base 41 are hinged by a pin 42, which greatly increases the freedom of the installation position of the hydraulic cylinder support 1. The lifting ring 22 at the linear guide rail 8 is connected to the lifting ring 22 at the first connecting rod 21 by a steel wire rope 23, which passes sequentially through the third bearing pulley 6, the steel wire rope through hole 54, the second bearing pulley 5, and the first bearing pulley 4, effectively transforming the horizontal force of the horizontal hydraulic cylinder 2 into a vertical force. The load sensor 9 is located at the end of the second connecting rod 84 that is different from the linear guide rail 8. The lower end of the load sensor 9 is sequentially provided with the second connecting rod 84, the U-shaped seat 82, and the fisheye joint bearing 83 located at the U-shaped opening of the U-shaped seat 82. Together with the second connecting rod 84, the U-shaped seat 82, and the fisheye joint bearing 83 located at the U-shaped opening of the U-shaped seat 82 at the upper end of the load sensor 9, a two-force bar structure is formed, protecting the load sensor 9 from damage by ensuring that it always bears the tensile load.

[0053] Please see Figure 6 and in conjunction with reference Figures 1-5 , Figure 6 The diagram shown illustrates the application of the vertical load loading test equipment of the present invention. The loading method of the vertical load loading test equipment includes:

[0054] Step S1: Secure the vehicle suspension system and its fixing clamps 201 onto the test platform 20 using the quick-release plate 202;

[0055] Step S2: Connect the fastening bolt 40 of the U-shaped seat 82 on the side opposite to the load sensor 9 to the loading arm 203 of the vehicle suspension system and its fixing clamp 201;

[0056] Perform step S3: Adjust the second connecting rod 84 to be perpendicular to the test platform 20;

[0057] Perform step S4: Adjust the first base 41 to the preset loading height and fix it;

[0058] Execute step S5: Rotate the first pulley support 43 to adjust it to the preset loading position of the horizontal hydraulic cylinder 2;

[0059] Step S6: Adjust the horizontal hydraulic cylinder 2 along the slide rail 11 to the preset loading height by using the lifting device 14, so that the wire rope 23 on the lifting ring 22 at the first connecting rod 21 of the horizontal hydraulic cylinder 2 is horizontal;

[0060] Execute step S7: Extend the piston rod of the horizontal hydraulic cylinder 2 so that the retraction stroke of the piston rod of the horizontal hydraulic cylinder 2 meets the test requirements;

[0061] Step S8: Retract the piston rod of the horizontal hydraulic cylinder 2, and pull the loading arm 203 through the steel wire rope 23 until the wheel center 204 reaches the initial position required for the test; in this invention, the initial position is the full load position.

[0062] Step S9: The test software controls two horizontal hydraulic cylinders 2 to apply tensile loads according to the loading requirements. More specifically, for example, the load phase difference between the two sides of the vehicle suspension system and its fixing clamp 201 is 180°, so that the loading arms 203 on both sides of the vehicle suspension system and its fixing clamp 201 alternately move up and down for the same stroke.

[0063] In summary, the vertical load loading test equipment of the present invention can accurately apply vertical tensile loads using horizontal hydraulic cylinders during automotive suspension system testing without frequent disassembly and reassembly of the hydraulic cylinders on the gantry. Moreover, it is simple to operate and easy to control, making it worthy of widespread use in the industry.

[0064] Those skilled in the art will understand that various modifications and variations can be made to this invention without departing from its spirit or scope. Therefore, if any modification or variation falls within the scope of the appended claims and their equivalents, the invention is considered to cover such modifications and variations.

Claims

1. A vertical load loading test device, characterized in that, The vertical load loading test equipment includes: The hydraulic cylinder support has a slide rail arranged vertically on the side and a lifting device with a worm gear mechanism and a handwheel at the top. A horizontal hydraulic cylinder is installed at the bottom of the hydraulic cylinder support and can rise or fall along the slide under the action of the lifting device. The telescopic end of the horizontal hydraulic cylinder is fixedly connected to the lifting ring through the first connecting rod. The gantry frame consists of columns and beams, arranged in a gate shape, and fixed to the foundation by a base. The first bearing pulley is disposed at the bottom of the column and further includes a first base fixed to the column by fastening bolts, a first pulley support hinged to the first base by a pin, and a first pulley movably connected to the first pulley support by a pulley pin with a nut. The second bearing pulley is set on the top of the column and further includes a first connecting seat fixed to the column by fastening bolts, a second pulley support fixed to the first connecting seat by fastening bolts and stacked on top of each other, and a second pulley movably connected to the second pulley support by a pulley pin with a nut. A wire rope through hole is provided at the same height as the inner edge of the column and the second pulley. The third bearing pulley is located in the middle of the crossbeam and further includes a third pulley support fixed to the crossbeam by fastening bolts, and a third pulley movably connected to the third pulley support by a pulley pin with a nut. The second connecting seat is in the shape of an I-beam and includes a first steel plate facing each other and a second steel plate disposed between the first steel plates. The upper part of the first steel plate is fixed to the crossbeam by fastening bolts, and the lower part of the second steel plate is fixed to the linear slider bearing by fastening bolts. The linear slider bearing has an intermediate slide. A linear guide rail is set in the middle slide of the linear slider bearing. The upper end of the linear guide rail is fixedly connected to a lifting ring with a washer. A wrench space is set at the lower end of the linear guide rail. The lifting ring at the linear guide rail is connected to the lifting ring at the first connecting rod by passing through the third bearing pulley, the wire rope through hole, the second bearing pulley, and the first bearing pulley in sequence via a steel wire rope. A fisheye joint bearing is set at the U-shaped opening of the U-shaped seat, and a second connecting rod is set at the tail end of the fisheye joint bearing. A load sensor is located at the end of the second connecting rod that is different from the linear guide rail. The lower end of the load sensor is provided with the second connecting rod, the U-shaped seat, and the fisheye spherical bearing located at the U-shaped opening of the U-shaped seat. A fastening bolt for connecting the test fixture is provided on the side of the U-shaped seat that is different from the load sensor.

2. The vertical load loading test equipment as described in claim 1, characterized in that, The uprights and beams of the gantry frame are made of square hollow steel.

3. The vertical load loading test equipment as described in claim 2, characterized in that, Reinforcing steel pipes are installed at intervals inside the columns and beams of the gantry frame.

4. The vertical load loading test equipment as described in claim 1, characterized in that, The bottom of the column is provided with pairs of fastening bolt through holes at different heights to adjust the height of the first base.

5. A loading method for the vertical load loading test device as described in claim 1, characterized in that, The loading method of the vertical load loading test equipment includes: Perform step S1: Secure the vehicle suspension system and its fixing clamps to the test platform using a quick-release plate; Execute step S2: Connect the fastening bolt on the side of the U-shaped seat opposite to the load sensor to the loading arm of the vehicle suspension system and its fixing clamp; Perform step S3: Adjust the second connecting rod to be perpendicular to the test platform; Perform step S4: Adjust the first base to the preset loading height and fix it; Perform step S5: Rotate the first pulley support to adjust it to the preset loading position of the horizontal hydraulic cylinder; Execution step S6: Adjust the horizontal hydraulic cylinder along the slide to the preset loading height by using the lifting device, so that the wire rope on the lifting ring at the first connecting rod of the horizontal hydraulic cylinder is horizontal; Perform step S7: Extend the piston rod of the horizontal hydraulic cylinder so that the retraction stroke of the piston rod of the horizontal hydraulic cylinder meets the test requirements; Execute step S8: retract the piston rod of the horizontal hydraulic cylinder, and pull the loading arm through the wire rope until the wheel center reaches the initial position required by the test. Step S9: The test software controls two horizontal hydraulic cylinders to apply tensile loads according to the loading requirements.

6. The loading method of the vertical load loading test device as described in claim 5, characterized in that, The initial position is the fully loaded position.

7. The loading method of the vertical load loading test device as described in claim 5, characterized in that, The load phase difference between the two sides of the vehicle suspension system and its fixing clamp is 180°, so that the loading arms on both sides of the vehicle suspension system and its fixing clamp alternately move up and down with the same stroke.

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