Engine suspension random vibration test clamping method

Abstract

The present application relates to the technical field of random vibration test of automobile engine suspension assembly, in particular to a kind of engine suspension random vibration test clamping method, comprising the following steps: data acquisition, preloading, reconstruction coordinates, upper suspension, fixed suspension and upper engine, through the steps of data acquisition and reconstruction coordinates, the reproduction of the suspension suspension position data is realized, so that the installation position of the suspension of different models of engine or motor can be completely reproduced on the frame, the installation height and installation distance, while cooperating with the lifting setting of hydraulic support assembly, to completely and accurately simulate the installation boundary conditions of the suspension on the frame, realize the test clamping installation of suspension, improve the precision and accuracy of suspension test, while avoiding the resource waste of the diversity of suspension clamping fixture.

Description

Technical Field

[0001] This invention relates to the field of random vibration testing technology for automotive engine mount assemblies, specifically to a clamping method for random vibration testing of engine mounts. Background Technology

[0002] An engine mount is an elastic support component that connects the engine to the chassis / body. Its core function is to dampen the transmission of engine vibration to the body and support the weight of the engine.

[0003] The engine mount random vibration test is a test centered on the mount system, aiming to verify its independent performance under complex vibration environments, rather than directly testing the engine. The test simulates engine mounting boundary conditions, applies vibration excitation to the mount, and then evaluates its vibration isolation capability, fatigue life, and other key indicators, providing data support for mount design optimization and vehicle NVH performance matching.

[0004] Furthermore, random vibration testing of engine mounts can be performed on a single mount or multiple mount systems, depending on the testing phase and actual requirements. Therefore, existing engine mounts require specific tooling fixtures for random vibration testing to mount and fix them, simulating the installation boundary conditions between the mount and the frame / body and engine. Moreover, the engine mounts of different brands and models are different, which leads to the inconsistency of the tooling fixtures for the corresponding engine mounts during testing.

[0005] Furthermore, with the development and popularization of new energy vehicles, random vibration tests of motor mounts are becoming increasingly routine. However, due to the limitations of different new energy vehicle brands and models, there is a lack of uniformity in the mounting fixtures.

[0006] For example, the invention patent with patent application number 202510276807.6 specifically discloses an engine mount test bench, method, device, and storage medium, including: a vibration table for constraining and mounting the engine under test and the mount; a support buffer disposed below the vibration table for supporting the vibration table and the engine under test and the mount, so that the vibration table and the engine under test and the mount are in a suspended state; exciters disposed on opposite sides of the vibration table, the exciters being used to drive the vibration table to vibrate when excited in the same phase or out of phase, so as to simulate road vibration; and a controller connected to the exciters for exciting the exciters in the same phase or out of phase. However, this test bench is only suitable for specific mounts and cannot be applied to the testing of all engine mounts or motor mounts.

[0007] Therefore, developing a mounting method that can be used for random vibration tests of all types of engine or motor mounts is of great practical significance. Summary of the Invention

[0008] The purpose of this invention is to provide a clamping method for random vibration testing of engine mounts, so as to solve the technical problem of inconsistent clamping and fixing of different models of engine and motor mounts in random vibration testing as mentioned in the background art, and realize a clamping method that can clamp and fix all engine and motor mounts, and achieve accurate simulation of the installation boundary conditions of the mounts.

[0009] A method for clamping an engine mount for random vibration testing includes the following steps:

[0010] Step a: Collect data. Select any mount on the engine assembly and mark the mounting connection position of the mount on the frame as point M. Measure the height h from point M to the horizontal ground and establish a three-dimensional coordinate system with point M as the origin. Collect and record the three-dimensional coordinates of the mounting connection positions of the other mounts on the engine assembly on the frame in this three-dimensional coordinate system.

[0011] Step b, pre-installation: Select a flat vibration platform, build a grid-like guide rail assembly with perpendicular cross-sections in the X and Y axes on the horizontal surface of the vibration platform, and install hydraulic support components on the grid-like guide rail assembly. The number of hydraulic support components corresponds to the number of mounts on the engine assembly.

[0012] Step c: Reconstruct coordinates. Select any hydraulic support component after installation, fix it, and select the suspended installation connection position on the hydraulic support component as point P. Start the hydraulic support component, raise point P to a position h away from the vibration platform, and establish a three-dimensional coordinate system with point P as the origin. Move and adjust the horizontal position of the remaining hydraulic support components and the height of the suspended installation connection position on the hydraulic support component so that the three-dimensional coordinates of the suspended installation connection positions on the remaining hydraulic support components correspond to the three-dimensional coordinates of the suspension in step a.

[0013] Step d: Mount the engine mount onto the corresponding hydraulic support assembly according to the corresponding coordinates.

[0014] Step e: Fix the suspension. Set a rigid frame on the outside of the hydraulic support assembly and use the rigid frame to fix and rigidly support the suspension mounting connection position on the hydraulic support assembly.

[0015] Step f: Mount the engine and connect it to the mounting bracket using bolts.

[0016] As an improvement, in step b, the grid guide rail assembly includes a transverse guide rail and a longitudinal guide rail. Both the transverse guide rail and the longitudinal guide rail are horizontally arranged, and the transverse guide rail is provided with a transverse guide groove along its own length direction. The longitudinal guide rail is provided with a longitudinal guide groove along its own length direction. The cross-sections of the transverse guide groove and the longitudinal guide groove are both convex. The hydraulic support assembly adjusts the horizontal coordinates along the transverse guide groove and the longitudinal guide groove respectively.

[0017] As an improvement, in step b, the hydraulic support assembly includes, from bottom to top, a base, a hydraulic rod, a connecting plate, and a support seat. The base is slidably mounted on the longitudinal guide rail and is connected to the longitudinal guide rail by means of threaded fastening. The hydraulic rod stands upright on the base in the vertical direction. The connecting plate is mounted on the top of the hydraulic rod, and the support seat is mounted on the connecting plate. The support seat is used to mount the corresponding suspension.

[0018] As an improvement, the support base is divided into a horizontal support base, a vertical support base, and an inclined support base; the horizontal support base is equipped with a vertically arranged suspension; the vertical support base is equipped with a horizontally arranged suspension; and the inclined support base is equipped with an inclined suspension.

[0019] As an improvement, the horizontal support includes an integrally formed connecting plate, a cross wall plate, and a horizontal seat. The cross wall plate connects the connecting plate and the horizontal seat, and the horizontal seat is equipped with a vertically arranged suspension.

[0020] As an improvement, the vertical support base includes an integrally set horizontal plate and vertical plate. The horizontal plate is set horizontally and perpendicular to the vertical plate. The horizontal plate is connected to the connecting plate, and the vertical plate is equipped with a horizontally set suspension.

[0021] As an improvement, the inclined support includes a horizontal plate, a vertical plate, and an inclined plate. The horizontal plate is horizontally arranged and connected to the connecting plate. The vertical plate is perpendicular to the horizontal plate and stands vertically on one side of the horizontal plate. The inclined plate is inclinedly arranged between the horizontal plate and the vertical plate.

[0022] As an improvement, in step e, the rigid frame includes a fixed base, a support arm, and a rigid support plate. The fixed base is square in shape and is installed and connected to the vibration platform. Slide rails are provided on both sides inside the square frame of the fixed base. The slide rails are provided with strip-shaped holes. The support arm can be moved and adjusted along the length of the slide rails. The support arm can also be extended and retracted in the vertical direction. The extended and retracted ends of the support arm are provided with rigid support plates, which support the support base.

[0023] As an improvement, the support arm consists of a sliding plate at the bottom, threaded sleeves symmetrically arranged at both ends of the sliding plate, and a threaded rod threadedly installed inside the threaded sleeve. The threaded rod is adjusted by raising and lowering through its threaded engagement with the threaded sleeve. The rigid support plate is installed on the top of the threaded rod.

[0024] As an improvement, when adjusting the lifting and lowering of the threaded rod, the threaded rod is simultaneously lifted and lowered by an adjustment component mounted on the sliding plate.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) The clamping method of the present invention realizes the reproduction of the suspension position data through the data acquisition and coordinate reconstruction steps, so that the suspension of different models of engines or motors can be completely reproduced on the frame, the installation position, installation height and installation distance. At the same time, with the lifting setting of the hydraulic support component, the installation boundary conditions of the suspension on the frame can be completely and accurately simulated, so as to realize the test clamping and fixing of the suspension, improve the accuracy and precision of the suspension test, and avoid the waste of resources due to the diversity of suspension clamping fixtures.

[0027] (2) The clamping method of the present invention completely fixes the suspension to the hydraulic support assembly through the steps of mounting the suspension and fixing the suspension, and locks the installation position, installation height and installation tilt angle of the suspension, so that when the engine is mounted on the suspension, the position of the suspension will not be misaligned. At the same time, the fixing suspension step uses a rigid frame instead of hydraulic support, which avoids the influence of hydraulic fluctuations on the suspension support during vibration testing and improves the testing accuracy of the suspension.

[0028] (3) By replacing the support base, the present invention can be used to install different models of suspensions and different installation angles of suspensions, thereby reducing the number of parts that need to be replaced or changed in the tooling fixtures. This allows for the applicability of more models of engine and motor suspensions with minimal changes. At the same time, the structure of the support base makes the installation of the suspension particularly stable, avoiding the impact of the resonance generated by the tooling fixture during vibration testing on the suspension during suspension testing.

[0029] (4) In the fixed suspension step of the present invention, when the rigid frame is adjusted to fix the suspension, the threaded rods on both sides of the rigid frame are raised and lowered synchronously to adjust the height of the rigid support plate, so as to ensure the levelness of the rigid support plate. When the rigid support plate provides rigid support for the suspension, it can play a very stable support effect, which further improves the detection accuracy of the suspension.

[0030] In summary, this invention has the advantages of strong applicability, high testing accuracy, and perfect reproduction of rotational installation boundary conditions, and is especially suitable for the field of clamping and positioning technology for engine mount testing. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the engine in Embodiment 1 of the present invention;

[0032] Figure 2 This is a three-dimensional structural diagram of the vibration platform according to Embodiment 1 of the present invention;

[0033] Figure 3 This is a three-dimensional structural diagram of the hydraulic support assembly according to Embodiment 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of the mounting and suspension structure of the hydraulic support assembly of the present invention;

[0035] Figure 5 This is a schematic diagram of the rigid frame rigid fixed suspension structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the rigid frame rigid fixed engine assembly structure of the present invention;

[0037] Figure 7 This is a top view of the fixed base and fixing seat structure of the present invention;

[0038] Figure 8 This is a schematic diagram of the three-dimensional structure of the support arm of the present invention;

[0039] Figure 9 This is a schematic diagram of the three-dimensional structure of the adjustment component of the present invention;

[0040] Figure 10 This is a schematic diagram of the internal structure of the regulating component of the present invention;

[0041] Figure 11 This is a side view of the anti-loosening nut structure of the present invention;

[0042] Figure 12 This is a schematic diagram of the cross-sectional structure of the transverse guide rail of the present invention;

[0043] Figure 13 This is a schematic diagram of the three-dimensional structure of the longitudinal guide rail of the present invention;

[0044] Figure 14 This is a three-dimensional structural diagram of the round-head screw of the present invention;

[0045] Figure 15 This is a schematic diagram of the three-dimensional structure of the horizontal support base of the present invention;

[0046] Figure 16 This is a schematic diagram of the three-dimensional structure of the vertical support base of the present invention;

[0047] Figure 17 This is a schematic diagram of the three-dimensional structure of the inclined support base of the present invention;

[0048] Figure 18This is a road spectrum-X direction signal image collected during the testing of this invention;

[0049] Figure 19 This is a road spectrum-Y direction signal image collected during the testing of this invention;

[0050] Figure 20 This is a road spectrum-Z direction signal image collected during the testing of this invention.

[0051] The attached diagram uses the following labels: Engine assembly 000, Suspension 10, Vibration platform 1, Cross rail assembly 2, Transverse guide rail 21, Transverse guide groove 211, Longitudinal guide rail 22, Longitudinal guide groove 221, Countersunk screw hole 222, Round head screw 223, Hex nut 224, Hydraulic support assembly 3, Base 31, Hydraulic rod 32, Connecting plate 33, Support seat 34, Horizontal support seat 341, Connecting plate 3411, Cross wall plate 3412, Horizontal seat 3413. Vertical support 342, horizontal plate 3421, vertical plate 3422, diagonal support 343, horizontal plate 3431, vertical plate 3432, diagonal plate 3433, rigid frame 5, anti-loosening nut 500, fixed base 51, slide rail 511, strip hole 512, support arm 52, sliding plate 521, threaded sleeve 522, threaded rod 523, rigid support plate 53, adjusting assembly 54, sprocket assembly 541, rotating shaft 542, handle 543. Detailed Implementation

[0052] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0053] The specific embodiments of the present invention will be described in detail below. However, it should be noted that the scope of protection of the present invention is not limited to these specific embodiments, but is determined by the claims in the appendix.

[0054] All publications, patent applications, patents, and other references mentioned in this specification are incorporated herein by reference. Unless otherwise defined, all technical and scientific terms used in this specification have the meanings commonly understood by those skilled in the art. In case of conflict, the definitions in this specification shall prevail.

[0055] When this specification uses the prefixes "known to those skilled in the art," "prior art," or similar terms to derive materials, substances, methods, steps, apparatus, or components, the objects derived from such prefixes cover those conventionally used in the art at the time the invention was proposed, but also include those that are not currently commonly used but will become generally recognized in the art as suitable for similar purposes.

[0056] It should be noted that the two or more aspects (or embodiments) disclosed in the context of this specification can be arbitrarily combined with each other, and the resulting technical solutions (such as methods or systems) are part of the original disclosure of this specification and also fall within the protection scope of this invention.

[0057] Unless otherwise specified, all percentages, parts, ratios, etc. mentioned in this specification are based on weight, unless being based on weight would not be in accordance with the common understanding of those skilled in the art.

[0058] Example 1:

[0059] like Figures 1 to 6 As shown, a method for clamping an engine mount for random vibration testing includes the following steps:

[0060] Step a: Collect data. Select any mount on the engine assembly and mark the mounting connection position of the mount on the frame as point M. Measure the height h from point M to the horizontal ground and establish a three-dimensional coordinate system with point M as the origin. Collect and record the three-dimensional coordinates of the mounting connection positions of the other mounts on the engine assembly on the frame in this three-dimensional coordinate system.

[0061] Step b, pre-installation: Select a flat vibration platform, build a grid-like guide rail assembly with perpendicular cross-sections in the X and Y axes on the horizontal surface of the vibration platform, and install hydraulic support components on the grid-like guide rail assembly. The number of hydraulic support components corresponds to the number of mounts on the engine assembly.

[0062] Step c: Reconstruct coordinates. Select any hydraulic support component after installation, fix it, and select the suspended installation connection position on the hydraulic support component as point P. Start the hydraulic support component, raise point P to a position h away from the vibration platform, and establish a three-dimensional coordinate system with point P as the origin. Move and adjust the horizontal position of the remaining hydraulic support components and the height of the suspended installation connection position on the hydraulic support component so that the three-dimensional coordinates of the suspended installation connection positions on the remaining hydraulic support components correspond to the three-dimensional coordinates of the suspension in step a.

[0063] Step d: Mount the engine mount onto the corresponding hydraulic support assembly according to the corresponding coordinates.

[0064] Step e: Fix the suspension. Set a rigid frame on the outside of the hydraulic support assembly and use the rigid frame to fix and rigidly support the suspension mounting connection position on the hydraulic support assembly.

[0065] Step f: Mount the engine and connect it to the mounting bracket using bolts.

[0066] like Figure 1 As shown, Figure 1 The engine assembly 000 has three different sets of mounts 10, two of which are vertically mounted and one is horizontally mounted. Select any set of mounts 10 and mark the mounting connection position of the mount on the frame as point M. Record the height of point M from the ground as h. Then, with point M as the origin, establish a three-dimensional coordinate system and mark the coordinates of the mounting connection positions of the other two sets of mounts on the frame as X1, Y1, Z1 / X2, Y2, Z2 respectively.

[0067] Then as Figure 2 As shown, a flat vibration platform is selected, and a grid-shaped guide rail group 2 is built on the horizontal surface of the vibration platform 1 with the X and Y axes perpendicularly intersecting. Hydraulic support components 3 are installed on the grid-shaped guide rail group 2. The number of hydraulic support components 3 corresponds to the number of mounts 10 on the engine assembly, that is, each hydraulic support component 3 is equipped with a set of mounts 10.

[0068] Immediately afterwards Figure 3 As shown, select any hydraulic support component 3 after installation, fix its horizontal position on the grid guide rail group 2, and select the installation connection position of the suspension on the hydraulic support component 3 as point P. Start the hydraulic support component 3, raise point P to a position h away from the vibration platform, and establish a three-dimensional coordinate system with point P as the origin. Install the suspension 10 located at the origin in step a at point P, and move and adjust the horizontal position of the remaining hydraulic support components and the height of the installation connection position of the suspension on the hydraulic support components, so that the three-dimensional coordinates of the installation connection positions of the suspension on the remaining hydraulic support components correspond to the three-dimensional coordinates of the suspension in step a, that is, X1, Y1, Z1 / X2, Y2, Z2. Then install the remaining suspension 10 onto the corresponding hydraulic support components according to the coordinates. The installation effect is as follows. Figure 4 As shown.

[0069] Finally, as Figure 5 As shown, a rigid frame 5 is installed around the hydraulic support assembly 3 on the vibration platform 1. The rigid frame 5 fixes and rigidly supports the suspension mounting connection positions on each set of hydraulic support assemblies 3. Finally, the engine 001 is installed on the corresponding suspension 10. The installation diagram is shown below. Figure 6As shown, after the engine 001 is mounted, a three-directional acceleration sensor is placed on the engine mount. Road spectrum signals are collected by driving the test vehicle over Belgian roads. The driving test vehicle over Belgian roads is simulated using vibration excitation, that is, the actual force state of the vehicle when driving over Belgian roads is simulated through three-directional (X / Y / Z) vibration coupling, thereby testing the durability, vibration, and noise (NVH) performance of the mount. Figures 18 to 20 The image shown is a road spectrum signal diagram collected during the suspension test of this invention.

[0070] like Figures 6 to 10 As shown, specifically, the rigid frame 5 includes a fixed base 51, a support arm 52, and a rigid support plate 53. The fixed base 51 is square in shape and is installed and connected to the vibration platform 1. Slide rails 511 are provided on both sides inside the square frame of the fixed base 51. The slide rails 511 are provided with strip holes 512. The support arm 52 can be moved and adjusted along the length of the slide rails 511. The support arm 52 can also be extended and retracted in the vertical direction. The extension and retraction ends of the support arm 52 are provided with rigid support plates 53. The rigid support plates 53 support the support seat 34 in the hydraulic support assembly 3. The rigid support plates 53 are made of materials with the same stiffness as the frame, and the modal frequency is 2 to 3 times higher than the highest frequency of the test to avoid resonance with the suspension.

[0071] Furthermore, the support arm 52 consists of a sliding plate 521 at the bottom, threaded sleeves 522 symmetrically arranged at both ends of the sliding plate, and a threaded rod 523 threadedly installed inside the threaded sleeves. The threaded rod 523 is adjusted in height by threading with the threaded sleeve 522. The rigid support plate 53 is installed on top of the threaded rod 523. When the rigid support plate 53 is installed and connected to the threaded rod 523, a lock nut 500 is used for tight locking. The structure of the lock nut 500 is as follows: Figure 11 As shown.

[0072] When adjusting the lifting and lowering of the threaded rod 523, the threaded rod 523 is simultaneously lifted and lowered by the adjusting component 54 provided on the sliding plate 521.

[0073] like Figures 9 to 10As shown, specifically, the adjusting assembly 54 includes two sets of sprockets 541, a rotating shaft 542, and a handle 543. Threaded sleeves 522 are rotatably mounted on the sliding plate 521. The threaded sleeves 522 are encased in a shell to prevent them from detaching. A set of sprockets 541 is located at the bottom of each threaded sleeve 522, and the sprockets 541 are connected to the rotating shaft 542. The rotating shaft 542 is located in the middle of the sliding plate 521. Rotation of the rotating shaft 542, via the sprockets 541, drives the two sets of threaded sleeves 522 to rotate. The threaded rod 523, passing through the threaded sleeve 522, is locked at its top by a rigid support plate 53, resulting in the threaded rod 523 having only axial freedom, while its circumferential freedom is locked. That is, the threaded rod 523 cannot rotate; the lifting effect can only be achieved through the rotation of the threaded sleeve 522. It should be emphasized that… The threads of the two sets of threaded rods 523 and threaded sleeves 522 are set in opposite directions, which corresponds to the forward and reverse rotation of the threaded sleeves 522. In addition, after the threaded rods 523 are raised or lowered to their positions, the connection between the threaded rods 523 and threaded sleeves 522 is locked by anti-loosening nuts 500 to prevent vibration interference between the threaded rods 523 and threaded sleeves 522 during vibration testing. The handle 543 is installed on the top of the rotating shaft 542 and is foldable at the top of the rotating shaft 542, that is, the handle 543 is hinged to the rotating shaft 542. The rotation angle limit is set at the hinge position of the handle 543 and the rotating shaft 542, that is, the handle 543 can only be rotated between the vertical and horizontal positions, so that the threaded rods 523 can be quickly raised, lowered and retracted by the handle 543 in a confined space.

[0074] Example 2:

[0075] Referring to Example 1, the difference between Example 2 and Example 1 lies in the following:

[0076] like Figure 4 , Figures 12 to 17As shown, the grid-shaped guide rail assembly 2 includes a horizontal guide rail 21 and a vertical guide rail 22. Both the horizontal guide rail 21 and the vertical guide rail 22 are horizontally arranged. The horizontal guide rail 21 is installed and connected to the vibration platform 1, while the vertical guide rail 22 is mounted on the horizontal guide rail 21. The vertical guide rail 22 can be adjusted horizontally along the horizontal guide rail 21. The horizontal guide rail 21 is provided with a horizontal guide groove 211 along its own length, and the vertical guide rail 22 is provided with a vertical guide groove 221 along its own length. The cross-sections of the horizontal guide groove 211 and the vertical guide groove 221 are both convex. The vertical guide rail 22 has a countersunk screw hole 2 facing downwards. 22. A round-head screw 223 is inserted into the countersunk screw hole 222. The round-head screw 223 is inserted into the transverse guide groove 211. A hexagonal nut 224 is horizontally movable in the transverse guide groove 211. A set of parallel opposite sides of the hexagonal nut 224 just abuts against the two side walls at the bottom of the transverse guide groove 211. That is, the transverse guide groove 211 limits the circumferential freedom of the hexagonal nut 224. The hexagonal nut 224 and the round-head screw 223 are threadedly engaged. After the round-head screw 223 and the hexagonal nut 224 are tightened, the longitudinal guide rail 22 is relatively fixed on the transverse guide rail 21. That is, the X-axis coordinate of the corresponding hydraulic support component 3 is locked.

[0077] Furthermore, the hydraulic support assembly 3, from bottom to top, includes a base 31, a hydraulic rod 32, a connecting plate 33, and a support base 34. The base 31 is slidably mounted on the longitudinal guide rail 22 and is connected to the longitudinal guide rail 22 by threaded fastening (it should be emphasized here that the fixed connection method between the base 31 and the longitudinal guide rail 22 is the same as the fixed connection method between the longitudinal guide rail 22 and the transverse guide rail 21. After the hydraulic support assembly 3 is relatively fixed to the longitudinal guide rail 22 by threaded fastening, the coordinates of the hydraulic support assembly 3 in the X-axis and Y-axis directions are completely locked). The hydraulic rod 32 is vertically... The hydraulic rod 32 is mounted upright on the base 31 in the Z-axis direction. The connecting plate 33 is installed on the top of the hydraulic rod 32, and the support seat 34 is installed on the connecting plate 33. The corresponding suspension 10 is installed on the support seat 34. After the X-axis and Y-axis coordinates of the hydraulic support assembly 3 are locked, the coordinates in the Z-axis direction are determined by adjusting the lifting height of the hydraulic rod 32. Specifically, the hydraulic rod 32 adopts a hydraulic lifting method, that is, the hydraulic rod 32 is connected to an external hydraulic station. The hydraulic station fills or discharges liquid into the hydraulic rod 32 to change the internal pressure of the hydraulic rod 32, so that the hydraulic rod 32 is raised or lowered.

[0078] The support base 34 is divided into a horizontal support base 341, a vertical support base 342, and an inclined support base 343; the horizontal support base 341 is equipped with a vertically arranged suspension; the vertical support base 342 is equipped with a horizontally arranged suspension; and the inclined support base 343 is equipped with an inclined suspension.

[0079] Specifically, the horizontal support base 341 includes an integrally formed connecting plate 3411, a cross wall plate 3412, and a horizontal base 3413. The cross wall plate 3412 connects the connecting plate 3411 and the horizontal base 3413, and the horizontal base 3413 is equipped with a vertically arranged suspension 10.

[0080] The vertical support base 342 includes an integrally formed horizontal plate 3421 and a vertical plate 3422. The horizontal plate 3421 is horizontally arranged and perpendicular to the vertical plate 3422. The horizontal plate 3421 is connected to the connecting plate 33, and the vertical plate 3422 is equipped with a horizontally arranged suspension 10.

[0081] The inclined support 343 includes a horizontal plate 3431, a vertical plate 3432, and an inclined plate 3433. The horizontal plate 3431 is horizontally arranged and connected to the connecting plate 33. The vertical plate 3432 is perpendicular to the horizontal plate 3431 and stands vertically on one side of the horizontal plate 3431. The inclined plate 3433 is inclinedly arranged between the horizontal plate 3431 and the vertical plate 3432 to form a triangular structure. The inclined suspension 10 is installed on the inclined plate 3433.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for clamping an engine mount during random vibration testing, characterized in that, Includes the following steps: Step a: Collect data. Select any mount on the engine assembly and mark the mounting connection position of the mount on the frame as point M. Measure the height h from point M to the horizontal ground and establish a three-dimensional coordinate system with point M as the origin. Collect and record the three-dimensional coordinates of the mounting connection positions of the other mounts on the engine assembly on the frame in this three-dimensional coordinate system. Step b, pre-installation: Select a flat vibration platform, build a grid-like guide rail assembly with perpendicular cross-sections in the X and Y axes on the horizontal surface of the vibration platform, and install hydraulic support components on the grid-like guide rail assembly. The number of hydraulic support components corresponds to the number of mounts on the engine assembly. Step c: Reconstruct coordinates. Select any hydraulic support component after installation, fix it, and select the suspended installation connection position on the hydraulic support component as point P. Start the hydraulic support component, raise point P to a position h away from the vibration platform, and establish a three-dimensional coordinate system with point P as the origin. Move and adjust the horizontal position of the remaining hydraulic support components and the height of the suspended installation connection position on the hydraulic support component so that the three-dimensional coordinates of the suspended installation connection positions on the remaining hydraulic support components correspond to the three-dimensional coordinates of the suspension in step a. Step d: Mount the engine mount onto the corresponding hydraulic support assembly according to the corresponding coordinates. Step e: Fix the suspension. Set a rigid frame on the outside of the hydraulic support assembly and use the rigid frame to fix and rigidly support the suspension mounting connection position on the hydraulic support assembly. Step f: Mount the engine and connect it to the mounting bracket using bolts.

2. The method for clamping an engine mount for random vibration testing according to claim 1, characterized in that: In step b, the grid guide rail assembly includes a horizontal guide rail and a vertical guide rail. Both the horizontal and vertical guide rails are horizontally arranged, and the horizontal guide rails are provided with horizontal guide grooves along their own length direction. The vertical guide rails are provided with vertical guide grooves along their own length direction. The cross-sections of the horizontal and vertical guide grooves are both convex. The hydraulic support assembly adjusts the horizontal coordinates along the horizontal and vertical guide grooves respectively.

3. The method for mounting a random vibration test engine mount according to claim 2, characterized in that: In step b, the hydraulic support assembly includes, from bottom to top, a base, a hydraulic rod, a connecting plate, and a support seat. The base is slidably mounted on the longitudinal guide rail and is connected to the longitudinal guide rail by means of threaded fastening. The hydraulic rod stands upright on the base in the vertical direction. The connecting plate is mounted on the top of the hydraulic rod. The support seat is mounted on the connecting plate, and the corresponding suspension is mounted on the support seat.

4. The method for clamping an engine mount for random vibration testing according to claim 3, characterized in that: The support base is divided into a horizontal support base, a vertical support base, and an inclined support base; the horizontal support base is equipped with a vertically arranged suspension; the vertical support base is equipped with a horizontally arranged suspension; and the inclined support base is equipped with an inclined suspension.

5. The method for clamping an engine mount for random vibration testing according to claim 4, characterized in that: The horizontal support includes an integrally formed connecting plate, a cross wall panel, and a horizontal seat. The cross wall panel connects the connecting plate and the horizontal seat, and the horizontal seat is equipped with a vertically arranged suspension.

6. The method for clamping an engine mount for random vibration testing according to claim 4, characterized in that: The vertical support base includes an integrally set horizontal plate and vertical plate. The horizontal plate is set horizontally and perpendicular to the vertical plate. The horizontal plate is connected to the connecting plate, and the vertical plate is equipped with a horizontally set suspension.

7. The method for clamping an engine mount for random vibration testing according to claim 4, characterized in that: The inclined support includes a horizontal plate, a vertical plate, and an inclined plate. The horizontal plate is horizontally arranged and connected to the connecting plate. The vertical plate is perpendicular to the horizontal plate and stands vertically on one side of the horizontal plate. The inclined plate is inclinedly arranged between the horizontal plate and the vertical plate, and an inclined suspension is installed on the inclined plate.

8. The method for clamping an engine mount for random vibration testing according to claim 3, characterized in that: In step e, the rigid frame includes a fixed base, a support arm, and a rigid support plate. The fixed base is square in shape and is installed and connected to the vibration platform. Slide rails are provided on both sides inside the square frame of the fixed base. The slide rails are provided with strip-shaped holes. The support arm moves and is adjusted along the length of the slide rails. The support arm is also adjusted to extend and retract in the vertical direction. A rigid support plate is provided at the extension and retraction end of the support arm, and the rigid support plate supports the support base.

9. The method for clamping an engine mount for random vibration testing according to claim 8, characterized in that: The support arm consists of a sliding plate at the bottom, threaded sleeves symmetrically arranged at both ends of the sliding plate, and a threaded rod threadedly installed inside the threaded sleeve. The threaded rod is adjusted by raising and lowering through its threaded engagement with the threaded sleeve. The rigid support plate is installed on the top of the threaded rod.

10. The method for clamping an engine mount for random vibration testing according to claim 9, characterized in that: When adjusting the lifting and lowering of the threaded rod, the threaded rod is simultaneously lifted and lowered by an adjusting component mounted on the sliding plate.

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