A strength testing device for automotive thrust rods

Abstract

This utility model discloses a strength testing device for automotive thrust rods, specifically relating to the technical field of strength testing devices. It includes a base, on which a pressure testing component is mounted. The pressure testing component includes a support rod positioned at the top of the base, a mounting seat on one side of the support rod, and a sliding plate on one side of the mounting seat. This utility model simulates the actual line contact state of the thrust rod under force through an arc-shaped pressure protrusion at the bottom of the pressure plate. Combined with an angle compensation design between the hydraulic rod and the hinge seat, it can accommodate slight tilting of the thrust rod after installation, solving the problem of inconsistency between planar pressure and actual force scenarios in traditional devices. It restores the true load-bearing capacity of the thrust rod and, through the symmetrical distribution of dual pressure sensors, can automatically identify abnormal differences in test data and issue alarms, solving the error problem easily encountered in single-sensor detection of traditional devices, ensuring the accuracy of test results such as static strength and ultimate load-bearing capacity.

Description

Technical Field

[0001] This utility model relates to the field of strength testing device technology, and more specifically, to a strength testing device for automotive thrust rods. Background Technology

[0002] Thrust rods are primarily used in commercial vehicles with non-independent suspensions (such as trucks and buses), and some off-road vehicles are also equipped with them. Their core function is to transmit force and limit displacement. They can be specifically divided into two categories: Longitudinal thrust rods: Arranged along the vehicle's longitudinal direction, they mainly transmit traction and braking forces. For example, when a vehicle accelerates, the engine's power is transmitted to the axle via the driveshaft, and then the longitudinal thrust rods transmit the driving force to the chassis, propelling the entire vehicle forward. Lateral thrust rods: Arranged along the vehicle's left-right direction, they mainly limit the lateral displacement of the axle. For example, when a vehicle turns or encounters lateral forces, the lateral thrust rods prevent excessive wheel deflection, ensuring driving stability.

[0003] The thrust rod is subjected to alternating loads (such as the impact of starting, braking, and bumpy roads) for a long time. If its strength is insufficient, it will cause serious consequences. Insufficient strength will lead to deformation of the thrust rod, which will damage the wheel alignment parameters (such as front wheel toe-in and camber angle), resulting in abnormal tire wear, heavy steering, and reduced vehicle handling and comfort. Existing thrust rod strength testing devices have low detection accuracy and mostly use a single pressure detection structure, which is prone to data deviation due to uneven force. The force simulation does not match the actual working conditions and mostly uses surface contact pressure, which is very different from the line contact force of the thrust rod in actual operation. Therefore, this application proposes a high-precision automotive thrust rod strength testing device that matches the actual working conditions and can protect the workpiece. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a strength testing device for automotive thrust rods, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a strength testing device for automotive thrust rods, including a base, on which a pressure testing component is provided;

[0006] The pressure detection assembly includes a support rod disposed on the top of the base, a mounting base disposed on one side of the support rod, a sliding plate disposed on one side of the mounting base, and a hinged seat disposed on the top of the sliding plate;

[0007] The bottom of the slide plate is provided with a reinforcing block, and the bottom end of the reinforcing block is provided with a pressure plate. The slide plate is provided with two pressure sensors for pressure detection, and the top of each pressure sensor is provided with a limit block.

[0008] Optionally, in one possible implementation, a hinge seat is provided between the two limiting blocks, the hinge seat is fixed on the slide plate, a hydraulic rod is provided at the top of the support rod, the output end of the hydraulic rod extends to the hinge seat and is hinged to the hinge seat, and a slider is slidably connected to the side of the mounting seat facing the slide plate, the slider is mounted on the slide plate by bolts;

[0009] Optionally, in one possible implementation, a limiting frame is provided below the pressure plate, the limiting frame is installed on the base by bolts, and a pressure protrusion is provided at the bottom end of the pressure plate, and the vertical cross-sectional shape of the pressure protrusion is set to arc shape.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] By simulating the line contact state of the actual force on the thrust rod through the arc-shaped pressure protrusion at the bottom of the pressure plate, and with the angle compensation design of the hydraulic rod and the hinge seat, it can adapt to the slight tilt after the thrust rod is installed, solving the problem that the planar pressure of the traditional device does not match the actual force scenario, restoring the true load-bearing condition of the thrust rod. Furthermore, through the symmetrical distribution of dual pressure sensors, it can automatically identify abnormal differences in detection data and issue alarms, solving the error problem that is prone to occur in the single-sensor detection of the traditional device, and ensuring the accuracy of test results such as static strength and ultimate load-bearing capacity.

[0012] The chrome-plated surface of the arc-shaped protrusions prevents indentations during pressurization, while the nitrile rubber pads on the inner wall of the limiting frame cushion the impact. This dual protection solves the problem of easy damage to the surface of the thrust rod or the ball head during traditional testing, reducing the scrap rate of workpieces. Furthermore, the limiting frame can be adjusted and fixed along the base, and supports the addition of bushings to compensate for length differences. This solves the problem that traditional devices can only test a single specification of thrust rod and have poor versatility, thus reducing equipment investment costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0014] Figure 1 This is a front view of the overall structure of this utility model.

[0015] Figure 2 This is a side view of the overall structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the base mounting seat, slider, and hydraulic rod of this utility model.

[0017] Figure 4 This is a schematic diagram of the sliding plate, pressure sensor, reinforcing block, pressure plate, hinge seat, and limiting block of this utility model.

[0018] The attached diagram is labeled as follows: 1. Base; 2. Support rod; 3. Mounting seat; 4. Slide plate; 5. Hinge seat; 6. Reinforcing block; 7. Pressure plate; 8. Pressure sensor; 9. Limiting block; 10. Hydraulic rod; 11. Slider; 12. Limiting frame. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The strength testing device for automotive thrust rods disclosed in this embodiment aims to solve the problems of low testing accuracy, force simulation that does not conform to actual working conditions, and easy damage to the thrust rod under test in existing testing devices.

[0021] The top of the base 1 is fixedly connected to the support rod 2 and the limiting frame 12 by bolts. The support rod 2 is vertically welded to both sides of the top of the base 1, and the top end is fixed to the hydraulic rod 10 by a bracket.

[0022] The hydraulic rod 10 adopts an electro-hydraulic proportional control hydraulic rod, and the output end is hinged to the hinge seat 5 through a fisheye bearing, which can realize angle compensation and adapt to the slight tilt after the thrust rod is installed.

[0023] The hinge seat 5 has an overall "U" shape and is fixed to the top center of the slide plate 4 by bolts. It is located between the two limit blocks 9 and is used to transmit the pressure of the hydraulic rod 10 and prevent the slide plate 4 from shifting under force.

[0024] The slide plate 4 is fixed to the slider 11 by bolts; the slider and the mounting base 3 slide together to ensure that the slide plate 4 can be raised and lowered vertically without jamming.

[0025] Two pressure sensors 8 are symmetrically distributed on both sides of the top of the slide plate 4, as shown below. Figure 4 As shown, a high-precision strain gauge sensor is used, and the limiting block 9 is fixed to the top of the slide plate 4 by bolts to position the pressure sensor 8 after installation.

[0026] The reinforcing block 6 is fixed to the bottom of the slide plate 4 by welding, which plays a role in dispersing pressure; the bottom of the pressure plate 7 is machined with an arc-shaped pressure protrusion, and the surface of the protrusion is chrome-plated, which can prevent indentations from appearing on the surface of the thrust rod when pressure is applied, and at the same time simulate the line contact force in actual working conditions.

[0027] The limiting frame 12 is fixed to the top of the base 1 by bolts and is located directly below the pressure plate 7; the inner wall of the limiting frame 12 is pasted with nitrile rubber pads to fix the ball heads or bushings at both ends of the thrust rod, and at the same time buffer the impact during pressurization, and adapt to the installation and positioning of thrust rods of different specifications.

[0028] The specific working principle is as follows: the position of the limiting frame 12 is adjusted longitudinally / laterally according to the type of the thrust rod: when the longitudinal thrust rod is detected, the limiting frame 12 is fixed along the front-back direction of the base 1; when the lateral thrust rod is detected, it is fixed along the left-right direction.

[0029] Place the ball heads at both ends of the thrust rod to be tested into the limiting frame 12, ensuring that the axis of the thrust rod is aligned with the center line of the arc-shaped protrusion of the pressure plate 7. If the thrust rod is short, a suitable bushing can be added to the limiting frame 12 for compensation.

[0030] Connect pressure sensor 8 to an external data acquisition instrument, calibrate the sensor zero point, and set the detection parameters: if detecting static strength, set a lower pressurization rate and holding time; if detecting ultimate bearing capacity, set a higher pressurization rate until the thrust rod exhibits plastic deformation or fracture.

[0031] When the hydraulic rod 10 is activated, its output end pushes the slide plate 4 to descend vertically along the slide groove of the mounting base 3 through the hinge seat 5. At this time, the reinforcing block 6 drives the pressure plate 7 to move down synchronously, and the arc-shaped protrusion gradually contacts the upper surface of the thrust rod.

[0032] After the pressure plate 7 contacts the thrust rod, the hydraulic rod 10 continuously applies pressure. The pressure is transmitted to the slide plate 4 through the reinforcing block 6, and then to the pressure sensor 8 through the slide plate 4. The pressure sensor 8 collects pressure data in real time and transmits it to the data acquisition instrument.

[0033] The data acquisition instrument compares the detection data of pressure sensor 8. If the difference exceeds the range, the device automatically stops pressurizing and alarms. If the data is normal, the pressure and displacement curves are displayed in real time, and the pressure changes during the pressurization process are recorded.

[0034] For example, if static strength is tested, and the thrust rod shows no obvious deformation and the pressure sensor 8 reading remains stable within 30 seconds of pressure holding, it is judged as "static strength qualified"; if deformation or a sudden drop in pressure occurs, it is judged as "unqualified". If ultimate bearing capacity is tested: record the pressure value when the thrust rod first shows plastic deformation and the pressure value at fracture, compare them with the design standard, and determine whether it meets the requirements.

[0035] After the test is completed, control the hydraulic rod 10 to reset, remove the thrust rod, clean the impurities in the limit frame 12, and prepare for the next test.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A strength testing device for automotive thrust rods, comprising a base (1), characterized in that: A pressure detection component is provided on the base (1); The pressure detection assembly includes a support rod (2) set on the top of the base (1), a mounting seat (3) is provided on one side of the support rod (2), a sliding plate (4) is provided on one side of the mounting seat (3), and a hinge seat (5) is provided on the top of the sliding plate (4). The bottom of the slide plate (4) is provided with a reinforcing block (6), and the bottom end of the reinforcing block (6) is provided with a pressure plate (7). The slide plate (4) is provided with two pressure sensors (8) for pressure detection, and each pressure sensor (8) is provided with a limit block (9) at its top.

2. The strength testing device for an automotive thrust rod according to claim 1, characterized in that: A hinge seat (5) is provided between the two limiting blocks (9), and the hinge seat (5) is fixed on the slide plate (4).

3. The strength testing device for an automotive thrust rod according to claim 2, characterized in that: The top end of the support rod (2) is provided with a hydraulic rod (10), and the output end of the hydraulic rod (10) extends to the hinge seat (5) and is hinged to the hinge seat (5).

4. The strength testing device for an automotive thrust rod according to claim 1, characterized in that: The mounting base (3) has a slider (11) slidably connected to the side facing the slide plate (4), and the slider (11) is mounted on the slide plate (4) by bolts.

5. The strength testing device for an automotive thrust rod according to claim 1, characterized in that: A limiting frame (12) is provided below the pressure plate (7), and the limiting frame (12) is installed on the base (1) by bolts.

6. The strength testing device for an automotive thrust rod according to claim 1, characterized in that: The bottom end of the pressure plate (7) is provided with a pressure protrusion, and the vertical cross-sectional shape of the pressure protrusion is set to be arc-shaped.

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