Vertical load loading test equipment and loading method

Abstract

A vertical load loading test device belongs to the field of automobiles, and comprises a hydraulic cylinder support with a side surface provided with a slide way and a top end provided with a lifting device; the horizontal hydraulic cylinder is arranged at the bottom of the hydraulic cylinder support and can ascend or descend along the slide way; a portal frame; a first pulley with a bearing; a second pulley with a bearing; a third pulley with a bearing; the lower part of the second connecting seat is fixed with a linear sliding block bearing; the upper end of the linear guide rail is connected with a lifting ring, and the lifting ring is connected with the lifting ring at the first connecting rod through a steel wire rope, a third bearing pulley, a steel wire rope through hole, a second bearing pulley and a first bearing pulley; a second connecting rod, a U-shaped seat and a fisheye knuckle bearing are sequentially arranged at the lower end of the load sensor, and a fastening bolt is arranged on one side of the U-shaped seat. According to the invention, during the automobile suspension system test, the horizontal hydraulic cylinder is adopted to accurately apply the vertical tension load, the hydraulic cylinder on the portal frame does not need to be frequently disassembled and assembled, the operation is simple, the control is easy, and the device is worthy of popularization and application in the industry.

Description

Technical Field

[0001] The invention relates to the technical field of bench testing of automobile suspension systems, and in particular to a vertical load loading test device and a loading method. Background Art

[0002] The automobile suspension system is an important assembly in the automobile chassis system. It connects the frame and wheels elastically and is related to the various performance of the automobile. The function of the automobile suspension system is to transmit the force and torque acting between the wheel and the frame, and at the same time buffer the impact force brought to the automobile frame or body by the uneven road surface, reduce the vibration caused by this, and ensure that the vehicle can travel smoothly. The automobile suspension system needs to be stressed during driving, and the structure and design of the automobile suspension system will affect the handling and comfort of the car. The reliability of the automobile suspension system directly affects the normal driving of the car and the life safety of the people on board. In particular, the automobile suspension system is subject to variable impact and fatigue loads when the car is driving. Therefore, the strength, fatigue and other mechanical properties of the automobile suspension system have higher requirements. Therefore, one of the most important tasks in the product development cycle is whether the fatigue life and strength of the automobile suspension system can meet the needs of various working conditions.

[0003] As the development speed of various vehicle models accelerates and the research and development cycle of vehicle models becomes shorter and shorter, it has become an urgent need for the development of the automotive industry to continuously strengthen the research and development of automobile suspension system tests and improve the overall mechanical properties of the automobile suspension system to meet the needs of various road conditions.

[0004] The main tests and verifications of automobile suspension systems by various OEMs are fatigue and strength. In fatigue or strength tests, the automobile suspension system needs to be pulled to the full load position for testing. Generally, one or two hydraulic cylinders suspended on the gantry are used to apply vertical static loads or dynamic loads to one or both sides of the suspension. Here, the vertical loads are upward pulling loads. There are many cases where multiple automobile suspension test benches are running at the same time, which leads to insufficient hydraulic cylinder resources on the gantry because most of the hydraulic cylinders are placed horizontally. If the horizontally placed hydraulic cylinder is hung on the gantry to complete the automobile suspension related tests, it is necessary to remove the hydraulic cylinder from the gantry to perform horizontal tests on other test samples. Obviously, in the existing automobile suspension system inspection and testing, there is either a shortage of automobile suspension test benches or a defect that the operation process is too cumbersome.

[0005] Therefore, in view of the problems existing in the prior art, the designers of this case, relying on their many years of experience in this industry, actively researched and improved, and thus came up with the vertical load loading test equipment and loading method of the present invention. Summary of the invention

[0006] The first purpose of the present invention is to provide a vertical load loading test equipment to address the defects in the prior art of automobile suspension system detection tests, such as a shortage of automobile suspension test benches or an overly complicated operation process.

[0007] The second purpose of the present invention is to provide a vertical load loading method for the prior art, in which there is either a shortage of automobile suspension test benches or an overly complicated operation process in the detection test of the automobile suspension system.

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

[0009] A hydraulic cylinder support, a slideway is vertically arranged on the side, and a lifting device with a worm gear mechanism and a hand wheel is arranged on the top;

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

[0011] The gantry is composed of columns and beams, arranged in a door shape and fixed to the foundation through a base;

[0012] A first pulley with a bearing is arranged at the bottom of the column, and further comprises a first base fixed to the column by a fastening bolt, 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 having a nut;

[0013] A second pulley with a bearing is arranged on the top of the column, and further comprises a first connection seat fixed to the column by fastening bolts, a second pulley support fixed to the first connection seat by fastening bolts and stacked up and down, and a second pulley movably connected to the second pulley support by a pulley pin with a nut, and a wire rope through hole is arranged at the same height as the inner edge of the column and the second pulley;

[0014] A third pulley with a bearing is arranged in the middle of the cross beam, and further comprises a third pulley support fixed on the cross beam by a fastening bolt, and a third pulley movably connected to the third pulley support by a pulley pin having a nut;

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

[0016] A linear guide is arranged in the middle slideway of the linear slider bearing, the upper end of the linear guide is fixedly connected to a lifting ring through which a gasket is passed, a wrench space is arranged at the lower end of the linear guide, the lifting ring at the linear guide passes through a steel wire rope, passes through the third pulley with bearing, the steel wire rope through hole, the second pulley with bearing, the first pulley with bearing in sequence, and is connected to the lifting ring at the first connecting rod, a fisheye joint bearing is arranged at the U-shaped opening of the U-shaped seat, and a second connecting rod is arranged at the tail end of the fisheye joint bearing;

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

[0018] Optionally, the columns and beams of the gantry are made of square hollow steel.

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

[0020] Optionally, fastening bolt through holes are arranged 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 the present invention, the present invention provides a loading method for a vertical load loading test device, the loading method for the vertical load loading test device comprising:

[0022] Execute step S1: fix the automobile suspension system and its fixing fixture on the test platform using a quick pressing plate;

[0023] Execute step S2: connect the fastening bolts on the side of the U-shaped seat that is different from the load sensor to the loading arm of the automobile suspension system and its fixing fixture;

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

[0025] Execute step S4: adjust the first base to a preset loading height and fix it;

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

[0027] Execute step S6: adjust the horizontal hydraulic cylinder along the slideway to a preset loading height through 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] Execute 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] Execute step S9: control the two horizontal hydraulic cylinders through the test software to apply tensile loads according to the loading requirements to conduct the test.

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

[0032] Optionally, the load phase difference on both sides of the automobile suspension system and the fixing fixture thereof is 180°, so that the loading arms on both sides of the automobile suspension system and the fixing fixture thereof run alternately up and down with the same stroke.

[0033] In summary, the vertical load loading test equipment of the present invention can not only use the horizontal hydraulic cylinder to accurately apply the vertical tensile load when testing the automobile suspension system without frequently disassembling the hydraulic cylinder on the gantry, but also is simple to operate and easy to control, and is worthy of promotion and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Shown is a schematic structural diagram of the vertical load loading test equipment of the present invention;

[0035] Figure 2 The figure shows a schematic diagram of a first bearing pulley at the bottom of a gantry column of a vertical load loading test device of the present invention;

[0036] Figure 3 It is a schematic diagram of the second bearing pulley on the top of the gantry column of the vertical load loading test equipment of the present invention;

[0037] Figure 4 The figure shows a schematic diagram of a steel wire rope through hole at the top of a gantry column of a vertical load loading test device of the present invention;

[0038] Figure 5 It is a schematic diagram of the third pulley with bearing in the middle of the beam of the vertical load loading test equipment of the present invention;

[0039] Figure 6 Shown is a schematic diagram of the application of the vertical load testing equipment of the present invention. Specific embodiments

[0040] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] See also Figure 1 to Figure 5, Figure 1 Shown is a schematic structural diagram of the vertical load loading test equipment of the present invention. Figure 2 Shown is a schematic diagram of a first bearing pulley at the bottom of a gantry column of a vertical load loading test device of the present invention. Figure 3 Shown is a schematic diagram of a second bearing pulley at the top of the gantry column of the vertical load loading test equipment of the present invention. Figure 4 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 figure shows a schematic diagram of a third pulley with bearing in the middle of the beam of the vertical load loading test equipment of the present invention. The vertical load loading test equipment comprises:

[0042] A hydraulic cylinder support 1, a slideway 11 is vertically arranged on the side of the hydraulic cylinder support 1, and a lifting device 14 having a worm gear mechanism 12 and a hand wheel 13 is arranged on the top of the hydraulic cylinder support 1;

[0043] A horizontal hydraulic cylinder 2, which is arranged at the bottom of the hydraulic cylinder support 1 and can rise or fall along the slideway 11 under the action of the lifting device 14, and the telescopic end of the horizontal hydraulic cylinder 2 is fixedly connected to the lifting ring 22 through a first connecting rod 21;

[0044] A gantry 3, wherein the gantry 3 is composed of columns 31 and beams 32, wherein the columns 31 and beams 32 are arranged in a door shape and are fixed to a foundation through a base 33;

[0045] A first bearing pulley 4, which is arranged at the bottom of the column 31 and further includes a first base 41 fixed to the column 31 by a fastening bolt 40, a first pulley support 43 hinged to the first base 41 by a pin 42, and a first pulley 46 movably connected to the first pulley support 43 by a pulley pin 45 having a nut 44;

[0046] A second bearing pulley 5, which is arranged on the top of the column 31 and further includes a first connecting seat 51 fixed to the column 31 by a fastening bolt 40, a second pulley support 52 fixed to the first connecting seat 51 by the fastening bolt 40 and stacked up and down, and a second pulley 53 movably connected to the second pulley support 52 by a pulley pin 45 with a nut 44, and a wire rope through hole 54 is arranged at the same height as the inner edge of the column 31 and the second pulley 53;

[0047] A third bearing pulley 6, the third bearing pulley 6 is arranged in the middle of the cross beam 32, and further comprises a third pulley support 61 fixed on the cross beam 32 by a fastening bolt 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 an I-beam shape, including a first steel plate 71 disposed facing each other and a second steel plate 72 disposed between the first steel plates 71, the upper portion of the first steel plate 71 is fixed to the crossbeam 32 by a fastening bolt 40, and the lower portion of the second steel plate 72 is fixed to a linear slider bearing 73 by a fastening bolt 40, and the linear slider bearing 73 has a middle slideway;

[0049] A linear guide 8, wherein the linear guide 8 is arranged in the middle slideway of the linear slider bearing 73, the upper end of the linear guide 8 is fixedly connected to the lifting ring 22 through which the gasket 74 is passed, and a wrench space 81 is arranged at the lower end of the linear guide 8, and the wrench space 81 is convenient for fastening the linear guide 8 and the lifting ring 22, as well as the linear guide 8 and the U-shaped seat 82 located at the lower end of the linear guide 8, the lifting ring 22 at the linear guide 8 is connected to the lifting ring 22 at the first connecting rod 21 through a wire rope 23, through the third pulley with bearing 6, the wire rope through hole 54, the second pulley with bearing 5, and the first pulley with bearing 4 in sequence, a fisheye joint bearing 83 is arranged at the U-shaped opening of the U-shaped seat 82, and a second connecting rod 84 is arranged at the tail end of the fisheye joint bearing 83;

[0050] The load sensor 9 is arranged at the end of the second connecting rod 84 which is different from the linear guide rail 8. The second connecting rod 84, the U-shaped seat 82, and the fisheye spherical bearing 83 located at the U-shaped opening of the U-shaped seat 82 are arranged in sequence at the lower end of the load sensor 9. The side of the U-shaped seat 82 which is different from the load sensor 9 is provided with a fastening bolt 40 for connecting the test fixture.

[0051] Please continue reading Figure 1 As a specific implementation, in order to reduce deadweight and save costs, the columns 31 and beams 32 of the gantry 3 can be made of square hollow steel. In order to prevent the columns 31 and beams 32 of the gantry 3 from being deformed under the action of the fastening bolts 40, preferably, reinforcing steel pipes 34 are arranged in intervals between the columns 31 and beams 32 of the gantry 3. In order to match the lifting device 14 of the hydraulic cylinder support 1, fastening bolt through holes 47 are arranged in pairs at different heights at the bottom of the columns 31 to adjust the height of the first base 41.

[0052] As a person skilled in the art can easily understand, the first pulley support 43 is hinged with the first base 41 through the pin 42, so the installation position freedom of the hydraulic cylinder support 1 is greatly improved. The lifting ring 22 at the linear guide 8 is connected to the lifting ring 22 at the first connecting rod 21 through the wire rope 23, which passes 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, effectively transforming the horizontal force of the horizontal hydraulic cylinder 2 into a vertical force. The load sensor 9 is arranged at the end of the second connecting rod 84 different from the linear guide 8, and 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, and 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 form a two-force rod structure to protect the load sensor 9 from always bearing the tensile load and being damaged.

[0053] See also Figure 6 , and refer to Figure 1 to Figure 5 , Figure 6 The figure shows an application schematic diagram of the vertical load test equipment of the present invention. The loading method of the vertical load test equipment comprises:

[0054] Execute step S1: fix the automobile suspension system and its fixing fixture 201 on the test platform 20 using a quick pressing plate 202;

[0055] Execute step S2: connect the fastening bolt 40 of the U-shaped seat 82 on the side different from the load sensor 9 to the loading arm 203 of the vehicle suspension system and its fixing fixture 201;

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

[0057] Execute step S4: adjust the first base 41 to a preset loading height and fix it;

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

[0059] Execute step S6: adjust the horizontal hydraulic cylinder 2 along the slideway 11 to a preset loading height through 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] Execute step S8: retract the piston rod of the horizontal hydraulic cylinder 2, and pull the loading arm 203 through the wire rope 23 until the wheel center 204 reaches the initial position required by the test; in the present invention, the initial position is the full load position.

[0062] Execute step S9: control the two horizontal hydraulic cylinders 2 to apply tensile loads according to the loading requirements through the test software to conduct the test. More specifically, for example, the load phase difference between the two sides of the automobile suspension system and its fixing fixture 201 is 180°, so that the loading arms 203 on both sides of the automobile suspension system and its fixing fixture 201 run the same stroke alternately up and down.

[0063] In summary, the vertical load loading test equipment of the present invention can not only use the horizontal hydraulic cylinder to accurately apply the vertical tensile load when testing the automobile suspension system without frequently disassembling the hydraulic cylinder on the gantry, but also is simple to operate and easy to control, and is worthy of promotion and use in the industry.

[0064] Those skilled in the art will appreciate that various modifications and variations may be made to the present invention without departing from the spirit or scope of the present invention. Therefore, if any modification or variation falls within the scope of protection of the appended claims and equivalents, it is considered that the present invention covers these modifications and variations.

Claims

1. A vertical load test device, characterized in that: The vertical load loading test equipment comprises: A hydraulic cylinder support, a slideway is vertically arranged on the side, and a lifting device with a worm gear mechanism and a hand wheel is arranged on the top; A horizontal hydraulic cylinder is arranged at the bottom of the hydraulic cylinder support and can rise or fall along the slideway under the action of the lifting device. The telescopic end of the horizontal hydraulic cylinder is fixedly connected to the lifting ring through a first connecting rod; The gantry is composed of columns and beams, arranged in a door shape and fixed to the foundation through a base; A first pulley with a bearing is arranged at the bottom of the column, and further comprises a first base fixed to the column by a fastening bolt, 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 having a nut; A second pulley with a bearing is arranged on the top of the column, and further comprises a first connection seat fixed to the column by fastening bolts, a second pulley support fixed to the first connection seat by fastening bolts and stacked up and down, and a second pulley movably connected to the second pulley support by a pulley pin with a nut, and a wire rope through hole is arranged at the same height as the inner edge of the column and the second pulley; A third pulley with a bearing is arranged in the middle of the cross beam, and further comprises a third pulley support fixed on the cross beam by a fastening bolt, and a third pulley movably connected to the third pulley support by a pulley pin having a nut; The second connecting seat is in the shape of an I-beam, and includes a first steel plate disposed facing each other and a second steel plate disposed between the first steel plates, the upper portion of the first steel plate is fixed to the crossbeam by a fastening bolt, and the lower portion of the second steel plate is fixed to the linear slider bearing by a fastening bolt, and the linear slider bearing has an intermediate slideway; A linear guide is arranged in the middle slideway of the linear slider bearing, the upper end of the linear guide is fixedly connected to a lifting ring through which a gasket is passed, a wrench space is arranged at the lower end of the linear guide, the lifting ring at the linear guide passes through a steel wire rope, passes through the third pulley with bearing, the steel wire rope through hole, the second pulley with bearing, the first pulley with bearing in sequence, and is connected to the lifting ring at the first connecting rod, a fisheye joint bearing is arranged at the U-shaped opening of the U-shaped seat, and a second connecting rod is arranged at the tail end of the fisheye joint bearing; The load sensor is arranged at the end of the second connecting rod which is different from the linear guide rail. The second connecting rod, the U-shaped seat, and the fisheye spherical bearing located at the U-shaped opening of the U-shaped seat are arranged in sequence at the lower end of the load sensor. A fastening bolt for connecting the test fixture is arranged on the side of the U-shaped seat which is different from the load sensor.

2. The vertical load testing device according to claim 1, characterized in that: The columns and beams of the gantry are made of square hollow steel.

3. The vertical load testing device according to claim 2, characterized in that: Reinforced steel pipes are arranged at intervals between the columns and beams of the gantry.

4. The vertical load testing device according to claim 1, characterized in that: The bottom of the column is provided with fastening bolt through holes in pairs at different heights to adjust the height of the first base.

5. A loading method for the vertical load testing device according to claim 1, characterized in that: The loading method of the vertical load loading test equipment comprises: Execute step S1: fix the automobile suspension system and its fixing fixture on the test platform using a quick pressing plate; Execute step S2: connect the fastening bolts on the side of the U-shaped seat that is different from the load sensor to the loading arm of the automobile suspension system and its fixing fixture; Execute step S3: adjust the second connecting rod to be perpendicular to the test platform; Execute step S4: adjust the first base to a preset loading height and fix it; Execute step S5: rotate the first pulley support to adjust it to a preset loading position of the horizontal hydraulic cylinder; Execute step S6: adjust the horizontal hydraulic cylinder along the slideway to a preset loading height through the lifting device so that the wire rope on the lifting ring at the first connecting rod of the horizontal hydraulic cylinder is horizontal; Execute 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; Execute step S9: control the two horizontal hydraulic cylinders through the test software to apply tensile loads according to the loading requirements to conduct the test.

6. The loading method of the vertical load testing device according to claim 5, characterized in that: The initial position is a fully loaded position.

7. The loading method of the vertical load testing device according to claim 5, characterized in that: The load phase difference between the two sides of the automobile suspension system and the fixing fixture thereof is 180°, so that the loading arms on both sides of the automobile suspension system and the fixing fixture thereof run the same stroke alternately up and down.

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