Wheel static rigidity testing device

Abstract

The utility model belongs to the field of wheel static rigidity, and particularly relates to a wheel static rigidity testing device which comprises a workbench, a supporting box body and an operation plate. A flange adaptive disc is arranged on the workbench, and the flange adaptive disc is sequentially connected with a loading force arm main shaft, a universal joint, a lead screw and a hand wheel. According to the utility model, based on the loading force arm main shaft and the universal joint, one-time installation of the wheel can be realized; the loading mode that the hand wheel rotates to drive the lead screw to move enables the loading mode to be simpler, more convenient and quicker; meanwhile, the multi-directional operation panel is arranged, the static rigidity values of the wheel can be measured in the axial direction and the transverse direction of the wheel respectively, the requirement for the static rigidity testing device in the axial direction and the transverse direction of the wheel is met at the same time, and measurement errors caused by repeated disassembly and assembly are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wheel static stiffness, specifically relates to a wheel static stiffness testing device. BACKGROUND

[0002] Wheel static stiffness reflects wheel tensile and compressive strength and deflection, and there is no special static stiffness testing device for testing wheel in the industry at present, and a wheel bending fatigue testing machine in the traditional sense is used instead, and according to the loading principle, only the wheel transverse static stiffness can be tested approximately, and the axial stiffness of the wheel cannot be measured. UTILITY MODEL CONTENTS

[0003] The utility model provides a wheel static stiffness testing device to solve the problem of lacking special static stiffness testing device in the prior art.

[0004] To achieve the above purpose, the utility model provides technical schemes as follows:

[0005] A wheel static stiffness testing device, comprising a workbench, a support box body and an operation plate;

[0006] The bottom of the workbench is provided with a support box body, and the bottom and side surface of the support box body are provided with an operation plate;

[0007] A flange adapter disc is arranged on the workbench, the bottom of the flange adapter disc penetrates the workbench, and a loading arm main shaft, a universal joint and a lead screw are sequentially connected;

[0008] The lead screw penetrates the support box body and the operation plate and is connected with a hand wheel.

[0009] Preferably, a support frame is further included, the support frame is arranged on the outer side of the operation plate, and the hand wheel is supported.

[0010] Preferably, a dial indicator is arranged in the support frame.

[0011] Preferably, a measurement reference scale is arranged on the lead screw.

[0012] Preferably, a force sensor is arranged on the lead screw.

[0013] Preferably, a wheel lip pad ring is arranged on the workbench.

[0014] Preferably, a rim pressing ring is arranged on the workbench.

[0015] Preferably, an adjusting pressing plate is further included, and the adjusting pressing plate is arranged on the workbench through a locking screw.

[0016] Preferably, a clamping screw is further included, and the clamping screw is arranged on the loading arm main shaft.

[0017] The wheel static stiffness testing device has the advantages that:

[0018] The utility model provides a kind of wheel static stiffness testing device, based on loading arm main shaft and universal joint, can be realized to the installation of wheel once;Hand wheel rotation drives the loading mode of lead screw movement, also make loading mode more simple and convenient;While setting the operating board of multiple directions, the stiffness of two directions of lateral and axial is measured respectively, and the measurement error caused by repeated disassembly is reduced.

[0019] The utility model further proposes the setting of two groups of clamping screw rods to avoid the falling of loading arm main shaft when disassembling wheel, and also uses force sensor to record load value, dial gauge to record offset, to realize the accurate calculation of wheel static stiffness value. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings constituting part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0021] Figure 1 It is a kind of wheel static stiffness testing device axial test structure schematic diagram;

[0022] Figure 2 It is a kind of wheel static stiffness testing device lateral test structure schematic diagram;

[0023] Figure 3 It is a kind of wheel static stiffness testing device axial test local amplification schematic diagram;

[0024] Figure 4 It is a kind of wheel static stiffness testing device lateral test local amplification schematic diagram;

[0025] Figure 5 It is the wheel offset and load relationship curve diagram calculated in example 1;

[0026] Figure 6 It is the wheel offset and load relationship curve calculated in example 1. DETAILED DESCRIPTION

[0027] The utility model will be described in detail below with reference to the drawings and in combination with embodiment. It should be noted that the embodiment in the utility model and the features in the embodiment can be combined with each other without conflict.

[0028] The following detailed description is exemplary in nature and is intended to provide further description of the present application. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the present application is for describing the specific embodiments only and is not intended to be limiting according to the example embodiments of the present application.

[0029] Please refer to Figure 1 The present application provides a kind of wheel static stiffness testing device, including workbench 4, support box 5 and operating plate 6.

[0030] The workbench 4 below is provided with support box 5, the side surface and bottom surface of support box 5 are provided with operating plate 6.

[0031] The wheel 18 is installed on flange adapter disc 17 by connecting bolt, and flange adapter disc 17 is bolted to loading arm shaft 15. The length of loading arm main shaft 15 is fixed, and the lower end is threadedly locked to universal joint 14. The ball head end of universal joint 14 can be connected to lead screw 13 to make it rotate freely, and force sensor 12 is provided on lead screw 13. The end of lead screw 13 is connected to hand wheel 10.

[0032] Support frame 11 is installed on operating plate 6, for fixing support lead screw 13, force sensor 12 and hand wheel 10. According to the test direction of wheel 18, support frame 11 can be installed on operating plate 6 at different positions, as shown in Figure 2 .

[0033] Rotating hand wheel 10 drives lead screw 13 to rotate, and the threaded structure of lead screw 13 rotates and moves to load the system composed of loading arm main shaft 15, universal joint 14 and force sensor 12, and the value of force sensor 12 can be read to monitor the tension and compression load value of the system.

[0034] A reference ruler 9 is provided on lead screw 13, which moves up and down with lead screw 13. A dial indicator 8 is also fixedly provided on support frame 11, which is used to measure the movement distance of reference ruler 9, as shown in Figure 3 , 4 .

[0035] The appropriate thickness of wheel lip pad ring 3 is placed on workbench 4 according to the rim size of wheel 18. In the initial state of not applying load during the transverse stiffness test of wheel 18, the thickness of wheel lip pad ring 3 is adjusted according to the level of horizontal ruler 19 placed on lead screw 13, and in the initial state of not applying load during the axial stiffness test of wheel 18, the thickness of wheel lip pad ring 3 can be adjusted according to the load zero position of force sensor 12.

[0036] According to the diameter size of the wheel 18, the flange pressure ring 16 is pressed on the inner flange of the wheel 18, the flange pressure ring 16 is an annular circle, 6-8 adjusting pressure plates 2 are uniformly distributed on the circumference of the flange pressure ring 16, the adjusting pressure plates 2 are adjusted to be horizontal, the locking screw 1 is screwed into the threaded hole of the workbench 4 in a threaded structure, and the flange pressure ring 16 can be locked and fixed in cooperation with the adjusting pressure plate 2, and the wheel 18 is fixed on the flange adapter disc 17, so that the measured wheel 18 is locked and fixed on the testing device.

[0037] Two groups of clamping screws 20 are further arranged on the workbench 4, and when the wheel 18 is disassembled, the two groups of clamping screws 20 are screwed into the clamping loading arm main shaft 15 to prevent the loading arm main shaft 15 from falling due to gravity. The top end of the clamping screw 20 is made of rubber material and will not scratch the loading arm main shaft 15 and can increase the clamping friction. When the wheel 18 is installed, the clamping screw 20 can be appropriately unscrewed to leave enough space for the offset of the loading arm main shaft 15.

[0038] The stiffness calculation method of the wheel 18 is to record the loading direction, the load value of the force sensor 12 and the offset of the dial gauge 8, and to calculate the static stiffness value of the wheel 18 according to the formula. For the axial test of the wheel 18, the loading direction of the force sensor 12 is vertically downward; for the lateral test of the wheel 18, the loading direction of the force sensor 12 is horizontally.

[0039] In a specific embodiment, the flange adapter disc 17 can be determined by the number and diameter of the bolt holes of the wheel 18, and can be replaced according to the needs.

[0040] In a specific embodiment, the lower end of the support box 5 is provided with a support base 7 to stably fix the entire testing device. Embodiment

[0041] The complete process of the wheel lateral static stiffness measurement of the utility model is as follows:

[0042] Firstly, the support frame 11 should be installed on the operation plate 6 in the horizontal direction, and the hand wheel 10, the force sensor 12 and the lead screw 13 are sequentially installed, and the lead screw 13 is hung on the ball head of the universal joint 14.

[0043] Secondly, the two groups of clamping screws 20 are screwed into the clamping loading arm main shaft 15, so that the loading arm main shaft 15 will not fall due to gravity, the lead screw 13 is placed horizontally, and the level 19 is placed on the lead screw 13; the clamping screw 20 is appropriately loosened, the height of the loading arm main shaft 15 is adjusted, and the level 19 is used to adjust the level of the lead screw 13.

[0044] According to the wheel 18 size selection appropriate lip pad ring 3 thickness, on the loading arm spindle 15 flange adapter plate 17 connected to the use of the vehicle bolt wheel 18 fixed flange adapter plate 17, put the rim ring 16 after the uniform and symmetric manner in turn tighten the workbench 4 on the 6~8 locking screw 1, adjust the adjusting plate 2 so that the rim ring 16 fastening wheel 18 installation.

[0045] Fully loosen the two groups of clamp screw 20 to ensure that the loading arm spindle 15 has enough offset space, so that the wheel 18, loading arm spindle 15, screw 13 system is fully settled by natural gravity, eliminate the system clearance and again confirm whether the level 19 is level.

[0046] Install the reference ruler 9 and dial gauge 8, large stroke clockwise and counterclockwise reciprocating hand wheel 5 times, eliminate the gap between the force sensor 12, screw 13 and universal joint 14.

[0047] Zero the force sensor 12 and dial gauge 8 while ensuring that the force sensor 12 is not affected by the load; after completing the above steps, the formal transverse static stiffness measurement begins, rotate the hand wheel 10 to horizontally pull the wheel 18 towards the load, and record the system deflection offset reading indicated by the dial gauge. Start from 0kN and increase the load at every 100N interval, with a maximum load of 1000N.

[0048] The example in Table 1 records the applied load and dial gauge offset values and the wheel transverse stiffness calculation results.

[0049]

[0050] Table 1

[0051] The wheel offset versus applied load curve calculated in this example is shown in Figure 5 .

[0052] Wheel transverse stiffness calculation formula:

[0053] K=L×0.001(Mb-Ma) / [(δMb-δMa)-(δ2Mb-δ2Ma)]

[0054] Where: K is the wheel stiffness value, unit kN.m / rad; δMa is the total system elastic deformation when 100N is applied, unit mm; δ2Ma is the loading arm spindle elastic deformation when 100N is applied, unit mm; δMb is the total system elastic deformation when 1000N is applied, unit mm; δ2Mb is the loading arm spindle elastic deformation when 1000N is applied, unit mm; Mb is the bending moment when 1000N is applied, unit N.m; Ma is the bending moment when 100N is applied, unit N.m; L is the length from the wheel mounting surface to the measurement point, mm, the device value in this case is 800mm.

[0055] In the process of wheel axial static stiffness measurement, the installation method and the measurement lateral static stiffness method and sequence are same, only the loading mechanism is installed on the operation plate 6 of the bottom, since the lead screw 13 is vertical at this time, the level meter 19 is not needed to correct the level, and the hand wheel 10 is rotated to load the wheel 18 vertically, and at this time, the loading arm main shaft 15 is only subjected to the load in the same axial direction as the wheel 18, without the influence of bending moment, and the length of the wheel 18 installation surface to the measurement point is not needed to participate in the calculation, only the applied load and the wheel 18 axial deformation are recorded, and the connection clearance and elastic deformation of the loading arm main shaft 15, the lead screw 13 and the like are ignored.

[0056] The example in the following table records the values of the applied load and the dial gauge offset and the wheel axial stiffness calculation results.

[0057]

[0058] Table 2

[0059] The wheel offset and applied load relationship curve calculated in the embodiment is as shown in the figure. Figure 6

[0060] The utility model discloses as professional static stiffness testing device, unique loading arm main shaft 15 and universal joint 14 connection mode can realize the wheel 18 one installation, and the stiffness of two directions of lateral and axial is measured respectively, and the measurement error caused by repeated dismounting is reduced.

[0061] The utility model discloses two unique groups of embrace and clamp screw rod method design, avoid loading arm main shaft 15 when dismounting wheel 18 fall.

[0062] The utility model discloses the recording load direction, force sensor load value and dial gauge offset mode, scientific method calculates the static stiffness value of wheel 18, and for the axial test of wheel 18, the load direction of force sensor 12 is vertical downward and pulls, and for the lateral test of wheel 18, the load direction of force sensor 12 is horizontal and pulls.

[0063] The utility model discloses unique hand wheel rotation drive lead screw 13 movement loading mode, make loading mode more simple and quick.

[0064] The utility model discloses only need once fixed installation wheel 18, under the premise of guaranteeing that the device structure is simple, and the operability is high, and the test method is scientific, improves the method of detection of the existing use wheel bending fatigue testing machine, realizes the static stiffness test of two directions of wheel axial and lateral.

[0065] ​It is to be understood by those skilled in the art that the present application can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are merely illustrative in all aspects and are not the only ones. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

[0066] It should be pointed out that: the above examples are used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application. Any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A wheel static stiffness testing device, characterized in that, Includes a workbench, support box, and control panel; The workbench is provided with a support box at the bottom, and the support box is provided with an operation panel at the bottom and side. A flange adapter plate is provided on the workbench. The bottom of the flange adapter plate passes through the workbench and is connected in sequence to the loading arm spindle, universal joint and lead screw. The lead screw passes through the support box and the control panel, and connects to the handwheel.

2. The wheel static stiffness testing device as described in claim 1, characterized in that, It also includes a support frame, which is located on the outside of the control panel and supports the handwheel.

3. The wheel static stiffness testing device as described in claim 2, characterized in that, A dial indicator is installed inside the support frame.

4. The wheel static stiffness testing device as described in claim 1, characterized in that, A measuring reference ruler is installed on the lead screw.

5. The wheel static stiffness testing device as described in claim 1, characterized in that, A force sensor is installed on the lead screw.

6. The wheel static stiffness testing device as described in claim 1, characterized in that, A wheel lip pad ring is provided on the workbench.

7. The wheel static stiffness testing device as described in claim 1, characterized in that, A rim pressure ring is provided on the workbench.

8. The wheel static stiffness testing device as described in claim 1, characterized in that, It also includes an adjusting pressure plate, which is set on the worktable by a locking screw.

9. The wheel static stiffness testing device as described in claim 1, characterized in that, It also includes a clamping screw, which is mounted on the main shaft of the loading arm.

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