Knuckle strength test deformation measuring device
By using a laser sensor assembly for non-contact measurement in the steering knuckle strength test, the problem of measuring the residual deformation of the steering knuckle was solved, high-precision displacement measurement was achieved, and sensor damage and loading chain interference were avoided.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CITIC DICASTAL CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-05-08
AI Technical Summary
In the existing technology, it is difficult to measure the residual deformation under primary load during the steering knuckle strength test, and the contact displacement sensor is easily damaged, resulting in large measurement errors.
A laser sensor assembly is used to measure the deformation of the steering knuckle in a non-contact manner. The laser sensor's signal transmission and reception windows, combined with a protective shell and fasteners, ensure the safety and measurement accuracy of the laser sensor.
It effectively avoids damage to the contact displacement sensor caused by steering knuckle fracture, eliminates the influence of gaps and deformation on the loading chain, improves the accuracy of measurement results, and closely approximates the displacement of the steering knuckle test loading point.
Smart Images
Figure CN224216050U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of steering knuckle bench testing technology, specifically relating to a device for measuring the deformation of a steering knuckle strength test. Background Technology
[0002] The steering knuckle is one of the main components of a car's suspension system. It connects to various links, bearings, wheel hubs, and brake assemblies, bearing the loads of the front and rear of the vehicle, supporting and driving the wheel hub rotation, and enabling the vehicle to steer flexibly and drive normally. The reliability of the steering knuckle directly affects the normal driving of the vehicle and the safety of its occupants. In particular, the steering knuckle is subjected to varying impacts and fatigue loads during vehicle operation, thus requiring higher standards for its strength, fatigue resistance, stiffness, and overall mechanical properties. Therefore, one of the most important tasks during the product development cycle is verifying whether the product's fatigue life and strength can meet the requirements of various operating conditions.
[0003] With the accelerated development of various vehicle models and the increasingly shorter R&D cycles, strengthening the R&D efforts in steering knuckle bench testing and improving the mechanical performance of steering knuckles to meet the needs of various road conditions has become an urgent requirement for the automotive industry. OEMs have gradually developed two verification schemes: test benches simulating automotive suspension and tests conducted on each individual hole of the steering knuckle. Approximately three-quarters of the tests conducted on each individual hole of the steering knuckle are strength tests. The single-hole strength test of the steering knuckle is generally divided into two or more load levels. The first load level requires measuring the residual deformation of the steering knuckle, while the second or more load levels directly reach the customer's required failure limit load. Because the customer has high requirements for residual deformation under the first load level of the strength test, typically requiring 0.2mm, 0.5mm, or 1mm, it is difficult to measure the residual deformation that meets the customer's requirements after the first load level using the displacement sensors built into existing testing equipment. This is because the loading chain includes various gaps and deformations in the test fixtures, fasteners, and testing equipment, making it prone to misjudgment. Utility Model Content
[0004] This invention proposes a device for measuring the deformation of a steering knuckle during a strength test, in order to solve the problem of difficulty in measuring the residual deformation under primary load during a steering knuckle strength test in the prior art.
[0005] To achieve the above objectives, the present invention proposes the following technical solution:
[0006] A device for measuring deformation in a steering knuckle strength test includes a laser sensor assembly, a support plate, a base, and a sliding plate;
[0007] The base includes an upright plate and a bottom plate. The upright plate is set on the bottom plate. The support plate is provided with a first elongated hole, and the upright plate is provided with a second elongated hole. The sliding plate is composed of a second connecting plate and a third connecting plate in a cross shape. The second connecting plate is connected to the base, the third connecting plate is connected to the first elongated hole on the support plate, and the second connecting plate is connected to the second elongated hole on the upright plate.
[0008] Preferably, the laser sensor assembly includes a second fastener, a first protective shell, a laser sensor, a second protective shell, and a third fastener;
[0009] The laser sensor has a first protective shell and a second protective shell at both ends, and the second fastener passes through the second protective shell, the laser sensor and the first protective shell in sequence, and is connected to the third fastener.
[0010] Preferably, the laser sensor has gaskets on both sides, and the second fastener passes through the gaskets on both sides of the laser sensor.
[0011] Preferably, the laser sensor is provided with a signal transmission window and a signal reception window, and the first protective shell has corresponding second openings and first openings.
[0012] Preferably, a third opening is provided at the corresponding position of the first protective shell and the second protective shell for the signal power line of the laser sensor to pass through.
[0013] Preferably, the wall thickness of the first protective shell and the second protective shell is 2-3 mm.
[0014] Preferably, it also includes a base plate, which fixes the steering knuckle strength test deformation measuring device by a quick-pressing plate.
[0015] The advantages of this utility model are:
[0016] This invention proposes a device for measuring deformation in a steering knuckle strength test. By using a non-contact method of laser displacement measurement, it avoids damage to the contact displacement sensor caused by steering knuckle breakage during the test. It also eliminates most of the gaps and deformations in the test fixtures, fasteners, and test equipment on the loading chain, making the displacement measurement results as close as possible to the displacement of the steering knuckle test loading point. Attached Figure Description
[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:
[0018] Figure 1 A structural diagram of a device for measuring deformation during a steering knuckle strength test;
[0019] Figure 2 This is an overall structural diagram of the laser sensor assembly;
[0020] Figure 3 This is an exploded view of the laser sensor;
[0021] Figure 4 This is a schematic diagram illustrating the practical application of a device for measuring deformation during a steering knuckle strength test. Detailed Implementation
[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.
[0023] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this invention.
[0024] Please see Figure 1 As shown, this utility model provides a steering knuckle strength test deformation measurement device, including a laser sensor assembly 1, a support plate 2, a base 3, a first fastener 4, a sliding plate 5, a first elongated hole 6, a vertical plate 7, a second elongated hole 8, and a base plate 9.
[0025] The laser sensor assembly 1 is fixed to the support plate 2 by a second fastener 10, and the support plate 2 is provided with a first elongated hole 6. The base 3 consists of a vertical plate 7 and a bottom plate 9, the vertical plate 7 is disposed on the bottom plate 9, and the vertical plate 7 is provided with a second elongated hole 8.
[0026] The slide plate 5 is composed of a second connecting plate 38 and a third connecting plate 39 in a cross shape. The second connecting plate 38 is connected to the base 3 by a first fastener 4. The third connecting plate 39 is connected to the first elongated hole 6 on the support plate 2 by the first fastener 4, so that the support plate 2 can move the laser sensor assembly horizontally along the first elongated hole 6. The second connecting plate 38 is connected to the second elongated hole 8 on the upright plate 7 by the first fastener 4, so that the slide plate 5 can move the support plate 2 and the laser sensor assembly 1 vertically along the second elongated hole 8.
[0027] The base plate 9 is used to fix the deformation measuring device 40 by means of the quick-pressing plate 27.
[0028] like Figure 2 , 3As shown, the laser sensor assembly 1 includes a second fastener 10, a first protective shell 11, a laser sensor 12, a second protective shell 13, and a gasket 23. The first protective shell 11 is connected to the laser sensor 12 and the second protective shell 13 in sequence. The laser sensor 12 has second bolt through holes 17 on both sides, and a gasket 23 is respectively provided at the second bolt through holes 17 on both sides.
[0029] The second fastener 10 passes through the third bolt through hole 21 on the second protective shell 13, the fourth bolt through hole 24 on the gasket 23, the second bolt through hole 17 on the laser sensor 12, the fourth bolt through hole 24 on the gasket 23, and the first bolt through hole 15 on the first protective shell 11 in sequence, and connects to the third fastener 22, thereby fastening the laser sensor assembly 1 to the support plate 2.
[0030] The function of the gasket 23 is to leave a certain space between the first protective shell 11, the second protective shell 13 and the laser sensor 12. When test fragments hit the first protective shell 11 and the second protective shell 13, the first protective shell 11 and the second protective shell 13 can deform and absorb energy, thereby protecting the laser sensor 12.
[0031] On the side of the signal transmitting window 18 and signal receiving window 19 of the laser sensor 12, the non-contact space between the laser sensor 12 and the first protective shell 11 and the second protective shell 13 can be slightly larger to protect the transmitting window 18 and signal receiving window 19 of the laser sensor 12.
[0032] The laser sensor 12 is provided with a signal transmission window 18 and a signal reception window 19. The first protective shell 11 has corresponding second openings 16 and first openings 14 to prevent the first protective shell 11 from interfering with the signal transmission and reception of the laser sensor 12. A third opening 20 is provided at corresponding positions of the first protective shell 11 and the second protective shell 13 for the signal power line of the laser sensor 12 to pass through.
[0033] In one specific embodiment, the wall thickness of the first protective shell 11 and the second protective shell 13 is 2-3 mm. Example
[0034] like Figure 4 As shown in the figure, the actual application of the deformation measuring device of this utility model is shown in the figure. The testing machine 25 is provided with a first connecting plate 26 at the corresponding position, and the universal base 28 is fixed to the first connecting plate 26 by a quick pressing plate 27.
[0035] Steering knuckle 29 is fixed to universal base 28 by fasteners. First joint bearing 30 is connected to the test position of steering knuckle 29 by corresponding fastener blocks, etc. First joint bearing 30 is threaded to connecting rod 32 and locked with nut 33. Measuring plate 31 is provided between nut 33 and connecting rod 32 at first joint bearing 30. The displacement signal of laser sensor 12 is realized by the movement of measuring plate 31 during the test. Of course, if space permits, the laser of laser sensor 12 can be directly projected onto steering knuckle body near test position of steering knuckle 29.
[0036] The other end of the connecting rod 32 is threaded to a second joint bearing 34 and locked with a nut 33. The second joint bearing 34 is connected to a U-shaped seat 35 via fasteners such as pins. The first joint bearing 30, the connecting rod 32, and the second joint bearing 34 together form a two-force bar structure, which will not hinder the normal movement of the steering knuckle 29 at the test position during the test. The U-shaped seat 35 is connected to the load sensor 36 via fasteners, and the load sensor 36 is used to provide feedback on the test load. The load sensor 36 is connected to the crossbeam 37 via fasteners, and the up-and-down movement of the crossbeam 37 generates a test load acting on the corresponding position of the steering knuckle 29. The laser sensor assembly 1 is adjusted to a suitable position through the first elongated hole 6 and the second elongated hole 8. At this time, the laser generated by the laser sensor 12 should be at an appropriate position on the measuring plate 31. After adjusting the position, the first fastener 4 on the sliding plate 5 is locked, and then the deformation measuring device 40 is fixed to the first connecting plate 26 using the quick-pressing plate 27.
[0037] This invention proposes a device for measuring deformation in a steering knuckle strength test. By using a non-contact method of laser displacement measurement, it avoids damage to the contact displacement sensor caused by steering knuckle breakage during the test. By placing a measuring plate near the steering knuckle, the displacement of the measuring plate is measured by laser to provide feedback on the displacement of the steering knuckle test loading point. This eliminates most of the gaps and deformations in the test fixtures, fasteners, and test equipment on the loading chain, making the displacement measurement results as close as possible to the displacement of the steering knuckle test loading point.
[0038] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.
Claims
1. A device for measuring deformation in a steering knuckle strength test, characterized in that, Includes laser sensor assembly, support plate, base and slide plate; The base includes an upright plate and a bottom plate. The upright plate is set on the bottom plate. The support plate is provided with a first elongated hole, and the upright plate is provided with a second elongated hole. The sliding plate is composed of a second connecting plate and a third connecting plate in a cross shape. The second connecting plate is connected to the base, the third connecting plate is connected to the first elongated hole on the support plate, and the second connecting plate is connected to the second elongated hole on the upright plate.
2. The device for measuring deformation in a steering knuckle strength test as described in claim 1, characterized in that, The laser sensor assembly includes a second fastener, a first protective shell, a laser sensor, a second protective shell, and a third fastener; The laser sensor has a first protective shell and a second protective shell at both ends, and the second fastener passes through the second protective shell, the laser sensor and the first protective shell in sequence, and is connected to the third fastener.
3. The device for measuring deformation in a steering knuckle strength test as described in claim 2, characterized in that, The laser sensor has gaskets on both sides, and the second fastener passes through the gaskets on both sides of the laser sensor.
4. The device for measuring deformation in a steering knuckle strength test as described in claim 2, characterized in that, The laser sensor is provided with a signal transmission window and a signal reception window, and the first protective shell has a corresponding second opening and a first opening.
5. The device for measuring deformation in a steering knuckle strength test as described in claim 2, characterized in that, A third opening is provided at the corresponding position of the first and second protective shells for the signal power line of the laser sensor to pass through.
6. The device for measuring deformation in a steering knuckle strength test as described in claim 2, characterized in that, The wall thickness of the first and second protective shells is 2-3 mm.
7. The device for measuring deformation in a steering knuckle strength test as described in claim 1, characterized in that, It also includes a base plate, which fixes the steering knuckle strength test deformation measuring device by a quick-pressing plate.