A bench test device for rear axle lateral thrust rod fixing seat weld joint strength
By simulating actual working conditions using a bench test device and utilizing hydraulic loading and stress monitoring modules, the high cost and low efficiency of rear axle weld strength verification in existing technologies have been solved, enabling accurate weld strength assessment and structural optimization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI JIANGLING CHASSIS CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-02
AI Technical Summary
In the existing technology, the weld strength between the rear axle lateral thrust rod fixing seat and the axle housing depends on theoretical calculations or vehicle road tests. This is costly, time-consuming, inefficient, and poses a high safety risk, making it difficult to accurately verify the ultimate load-bearing capacity of the weld.
Design a bench test device to apply bidirectional alternating loads through a hydraulic loading module, monitor weld strain in real time using a stress monitoring module, predict weld durability using strain gauges or fiber optic sensors, and verify weld strength by simulating actual working conditions.
It reduces testing costs, shortens development cycles, accurately quantifies weld strength, improves weld reliability and safety, and provides data support for structural optimization.
Smart Images
Figure CN224317435U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive chassis component testing technology, and specifically discloses a bench test device for the weld strength of the rear axle lateral thrust rod fixing seat. Background Technology
[0002] In existing technologies, the weld strength between the rear axle lateral thrust rod mounting bracket and the axle housing largely relies on theoretical calculations or vehicle road tests, which presents the following problems: high cost: long vehicle road test cycle and high cost; low efficiency: unable to specifically quantify the ultimate load-bearing capacity of the weld; safety risks: stress concentration in the weld of traditional mounting bracket structures, easy cracking during road tests, insufficient fatigue life, and weld failure can lead to lateral instability of the rear axle, which is difficult to predict in advance using traditional methods.
[0003] Therefore, there is an urgent need for a dedicated test bench device to simulate actual working conditions and loads, and to accurately verify the weld strength. Utility Model Content
[0004] The purpose of this invention is to address the deficiencies in the existing technology and provide a bench test device for the weld strength of the rear axle lateral thrust rod fixing seat.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A bench test device for the weld strength of a rear axle lateral thrust rod fixing seat includes a lateral thrust rod fixing seat and a rear axle tube welded together, and a lateral thrust rod fixing frame is fixed to one side of the lateral thrust rod fixing seat by bolts.
[0007] The transverse thrust rod fixing frame is connected to the double fork force transmission rod via a transmission pin, and the end of the double fork force transmission rod is fixed with a power connection plate;
[0008] A stress monitoring module is installed at the welding position of the thrust rod fixing seat and the rear axle tube, and a hydraulic loading module is installed above the power connection plate.
[0009] Furthermore, the rear axle tube is fixedly connected to the side plate via clamping blocks and bolts.
[0010] Furthermore, a front side plate reinforcing rib is fixed to one side of the side plate, a rear side plate reinforcing rib is fixed to the other side, and a bottom plate is fixed to the bottom of the side plate.
[0011] Furthermore, the stress monitoring module includes strain gauges or fiber optic sensors arranged around the welds of the transverse thrust rod mounting base and the rear axle tube.
[0012] Furthermore, the hydraulic loading module can apply bidirectional alternating loads to simulate the actual stress conditions of the transverse thrust rod fixing seat.
[0013] The beneficial effects of this utility model are as follows: 1. The hydraulic loading module of this application can apply bidirectional alternating loads, which can simulate the tension and compression of the thrust rod and cover actual working conditions;
[0014] 2. A stress monitoring module is installed at the welding position of the thrust rod fixing seat and the rear axle tube in this application. The stress monitoring module includes strain gauges or fiber optic sensors arranged around the weld of the transverse thrust rod fixing seat and the rear axle tube. The weld durability is predicted by combining sensor data with fatigue life algorithm.
[0015] This application reduces testing costs, shortens the development cycle, accurately quantifies weld strength, and improves reliability; it also provides data support for optimizing the fixed base structure. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a side view of the present invention. Detailed Implementation
[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0019] Reference Figure 1 , Figure 2 A bench test device for the weld strength of a rear axle lateral thrust rod fixing seat includes a lateral thrust rod fixing seat 1 and a rear axle tube 2 welded together, and a lateral thrust rod fixing frame 3 is fixed to one side of the lateral thrust rod fixing seat 1 by bolts.
[0020] The transverse thrust rod fixing frame 3 is connected to the double fork force transmission rod 5 through the transmission pin 4, and the end of the double fork force transmission rod 5 is fixed with a power connection plate 6;
[0021] A stress monitoring module is installed at the welding position of the thrust rod fixing seat 1 and the rear axle tube 2, and a hydraulic loading module is installed above the power connection plate 6.
[0022] The stress monitoring module includes strain gauges or fiber optic sensors arranged around the welds of the transverse thrust rod fixing seat 1 and the rear axle tube 2; the hydraulic loading module can apply bidirectional alternating loads to simulate the actual stress conditions of the transverse thrust rod fixing seat 1.
[0023] Furthermore, the rear axle tube 2 is fixedly connected to the side plate 9 by pressure block 7 and bolt 8. A front side plate reinforcing rib 10 is fixed on one side of the side plate 9, and a rear side plate reinforcing rib 11 is fixed on the other side. A bottom plate 12 is fixed to the bottom of the side plate 9.
[0024] The hydraulic loading module of this application can apply bidirectional alternating loads, which can simulate the tension and compression of the thrust rod and cover actual working conditions.
[0025] During the experiment in this application, the load is applied as follows: a vertical alternating load is applied to the fixed seat through a hydraulic actuator, and the vertical push-pull force exerts a test load F on the transverse thrust rod fixed seat.
[0026] F = ma = 4200 × 0.75 × 9.81 = 30901.5 N ≈ 31 kN; (Rear axle load: m = 4200 kg, lateral acceleration: a = 0.75 g, generally taken as 0.5 g to 1 g for mid-sized buses and light commercial vehicles.)
[0027] Data acquisition: Strain gauges or fiber optic sensors record strain data in the weld area in real time, and stress distribution is analyzed by software;
[0028] Failure determination: When the strain value exceeds the material yield strength or the number of load cycles reaches a preset threshold, the weld is determined to not meet the strength requirements.
[0029] A stress monitoring module is installed at the welding position of the thrust rod fixing seat 1 and the rear axle tube 2 in this application. The stress monitoring module includes strain gauges or fiber optic sensors arranged around the weld of the transverse thrust rod fixing seat and the rear axle tube. The weld durability is predicted by combining sensor data with fatigue life algorithm.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A bench test apparatus for measuring the weld strength of a rear axle lateral thrust rod fixing seat, comprising a lateral thrust rod fixing seat and a rear axle tube welded together, characterized in that, One side of the transverse thrust rod fixing seat is fixed with a transverse thrust rod fixing frame by bolts; The transverse thrust rod fixing frame is connected to the double fork force transmission rod via a transmission pin, and the end of the double fork force transmission rod is fixed with a power connection plate; A stress monitoring module is installed at the welding position of the thrust rod fixing seat and the rear axle tube, and a hydraulic loading module is installed above the power connection plate.
2. The bench test apparatus for the weld strength of the rear axle lateral thrust rod fixing seat according to claim 1, characterized in that, The rear axle tube is fixedly connected to the side plate by pressure blocks and bolts.
3. The bench test apparatus for testing the weld strength of the rear axle lateral thrust rod fixing seat according to claim 2, characterized in that, A front side plate reinforcing rib is fixed to one side of the side plate, a rear side plate reinforcing rib is fixed to the other side, and a bottom plate is fixed to the bottom of the side plate.
4. The bench test apparatus for the weld strength of the rear axle lateral thrust rod fixing seat according to claim 1, characterized in that, The stress monitoring module includes strain gauges or fiber optic sensors arranged around the welds of the transverse thrust rod mounting base and the rear axle tube.
5. The bench test apparatus for testing the weld strength of the rear axle lateral thrust rod fixing seat according to claim 1, characterized in that, The hydraulic loading module can apply bidirectional alternating loads to simulate the actual stress conditions of the transverse thrust rod fixing seat.