Commercial vehicle air suspension guide arm single side performance detection device

Abstract

The utility model relates to detection device field, and it is mainly designed for solving the problem of low detection accuracy and the problem of the current inability to realize the independent loading of the guide arm single side and data acquisition, it includes workbench, and the end of workbench has loading mechanism, and the sliding slot of workbench has middle clamping device, loading mechanism includes a plurality of stand fixed in the end of workbench, and the top of stand has top plate, and actuator is fixed on top plate, and test pressure head is fixed on the lower end of actuator, two degrees of freedom adjusting mechanism includes two test pulleys and test mandrel, and the clearance fit of test mandrel middle part and workpiece guide arm's lug hole diameter, both ends are narrower than middle part and have steps, and the both ends of test mandrel have screw threads, and the sliding block of slidable base of middle clamping device is placed in the sliding slot of workbench, and the upper surface of slidable base has recess, and cover plate is connected on slidable base through bolt, and the lower surface of cover plate has recess, the advantage is to improve detection precision and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of testing devices, specifically to a device for testing the single-sided performance of a commercial vehicle air suspension guide arm. Background Technology

[0002] Currently, a new type of guide arm with varying stiffness and curvature at the front and rear ends is being developed within the commercial vehicle air suspension system. Existing guide arm performance testing utilizes an integrated testing platform, which cannot achieve independent loading and data acquisition on a single side, resulting in low testing accuracy and difficulty in locating product defects. Furthermore, traditional tooling has poor adaptability and cannot cover the testing needs of various new guide arm models. In addition, the lack of a targeted fatigue simulation environment during actual operation can easily lead to early failures in critical connection points going undetected, posing safety hazards. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a commercial vehicle air suspension guide arm single-sided performance testing device that can improve testing accuracy and efficiency, adapt to multiple models of guide arms, and has strong versatility.

[0004] The purpose of this utility model is achieved as follows: it includes a worktable with a groove on the upper surface of the worktable; a loading mechanism is provided at the end of the worktable, and a central clamping device is provided in the groove of the worktable.

[0005] The loading mechanism includes several upwardly extending columns fixed to the end of the workbench. A top plate is fixed to the top of the columns, an actuator is fixed to the top plate, and a test pressure head is fixed to the lower end of the actuator. The test pressure head is oriented downwards and is in the shape of a large disc.

[0006] It also includes a dual-degree-of-freedom adjustment mechanism, which includes two test pulleys and a test mandrel. The test mandrel is designed with a clearance fit between the middle part and the lifting lug hole of the workpiece guide arm, and the two ends are narrower than the middle part and have steps. The narrower parts of the two ends of the test mandrel are threaded. The test mandrel is inserted into the hole of the lifting lug, and then the test pulleys are respectively installed on the narrow parts of the test mandrel on both sides of the lifting lug. The nuts are tightened to fix the test pulleys, ensuring that the test pulleys and the test mandrel are connected as one unit, and the test mandrel can rotate freely in the lifting lug.

[0007] The aforementioned central clamping device includes a sliding base. A slider at the bottom of the sliding base is placed in a groove on the worktable. The upper surface of the sliding base has a downwardly recessed groove in the middle. A cover plate is provided on the top of the sliding base and is bolted to the sliding base. The lower surface of the cover plate has a groove, which corresponds to the groove on the upper surface of the sliding base. The end of the workpiece guide arm that needs to be inspected is placed facing the loading mechanism. The sliding base is slid to a suitable position on the worktable. A center pin is used to align the center hole of the guide arm with the groove of the sliding base. Then, the upper cover plate is placed, with the upper end of the center pin placed in the groove on the lower surface of the cover plate. The cover plate is then bolted to the sliding base, thus clamping the middle of the guide arm.

[0008] During testing, the test head contacts two pulleys, allowing the pulleys to roll without friction under the large disc test head. Without pulleys, the workpiece and the test head would generate a large sliding friction, affecting the test results.

[0009] The advantages of this invention are: significantly improved detection accuracy and efficiency; adaptable to multiple guide arm models, with strong versatility; enables independent loading and fatigue simulation on one side, effectively identifying local defects; real-time and accurate data acquisition; safe and controllable process, reducing safety hazards. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0011] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 3 yes Figure 2 AA view;

[0013] Figure 4 This is a schematic diagram of the structure of the test mandrel in this utility model. Detailed Implementation

[0014] The following is combined Figure 1-4 The present invention will be further described below;

[0015] It includes a worktable 1 with a groove 2 on the upper surface of the worktable; a loading mechanism is provided at the end of the worktable, and a central clamping device is provided in the groove of the worktable.

[0016] The loading mechanism includes several upwardly extending columns 3 fixed to the end of the workbench. A top plate 4 is fixed to the top of the columns, an actuator 5 is fixed to the top plate, and a test pressure head 6 is fixed to the lower end of the actuator. The test pressure head 6 is oriented downwards and is in the shape of a large disc.

[0017] It also includes a dual-degree-of-freedom adjustment mechanism, which includes two test pulleys 7 and a test mandrel 8. The test mandrel is designed with a clearance fit between the middle part and the lifting lug hole of the workpiece guide arm, and the two ends are narrower than the middle part and have steps. The narrower parts of the two ends of the test mandrel are threaded. The test mandrel is inserted into the hole of the lifting lug, and then the test pulleys are respectively installed on the narrow parts of the test mandrel on both sides of the lifting lug. The nuts are tightened to fix the test pulleys, ensuring that the test pulleys and the test mandrel are connected as one unit, and the test mandrel can rotate freely in the lifting lug.

[0018] The aforementioned central clamping device includes a sliding base 9, with a slider 10 at the bottom of the sliding base placed in a groove 2 on the worktable. The upper surface of the sliding base has a downwardly recessed groove in the center, and a cover plate 11 is provided on the top of the sliding base. The cover plate is bolted to the sliding base. The lower surface of the cover plate has a groove, which corresponds to the groove on the upper surface of the sliding base. The end of the workpiece guide arm 12 to be inspected is placed facing the loading mechanism. The sliding base is slid to a suitable position on the worktable. A center pin 13 is used to align the center hole of the guide arm with the groove of the sliding base. Then, the upper cover plate is placed, with the upper end of the center pin positioned in the groove on the lower surface of the cover plate. The cover plate is bolted to the sliding base, thus clamping the middle of the guide arm.

[0019] During testing, the test head contacts two pulleys, allowing the pulleys to roll without friction under the large disc test head. Without pulleys, the workpiece and the test head would generate a large sliding friction, affecting the test results.

[0020] This invention achieves precise simulation and real-time data acquisition of the unilateral force state of the guide arm by setting up an independent loading mechanism and a central clamping device. A dual-degree-of-freedom adjustment mechanism is installed at the end force position to simulate complex force states during actual driving. The hydraulic head tooling is designed as a large-area disc, enabling versatility across multiple product types, especially in applying localized loads to areas with varying curvature, improving the realism and reliability of the test. Simultaneously, the central clamping device is designed as a sliding adjustable positioning structure, adapting to the clamping requirements of different guide arm models and enhancing the tooling's versatility. Combined with the end performance test module (all components except the central clamping device are end performance test modules), it simulates dynamic loads under complex road conditions, fully exposing potential structural defects, ensuring product reliability, significantly improving testing efficiency and safety, and meeting the quality control requirements of key components for commercial vehicle air suspension.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single-sided performance testing device for air suspension guide arms of commercial vehicles, comprising a workbench (1), characterized in that: The workbench has a groove on its upper surface (2); the end of the workbench is equipped with a loading mechanism, and the groove of the workbench is equipped with a central clamping device. The loading mechanism includes several upwardly extending columns (3) fixed to the end of the workbench, a top plate (4) fixed to the top of the columns, an actuator (5) fixed to the top plate, and a test head (6) fixed to the lower end of the actuator; the test head (6) is set downwards and is in the shape of a large disc; It also includes a dual-degree-of-freedom adjustment mechanism, which includes two test pulleys (7) and a test mandrel (8). The middle part of the test mandrel is clearance-fitted with the lifting lug hole of the workpiece guide arm, and the two ends are narrower than the middle part and have steps. The narrower part of the two ends of the test mandrel has threads. The test mandrel is inserted into the hole of the lifting lug, and the test pulleys are respectively installed on the narrow part of the test mandrel on both sides of the lifting lug. The nuts are tightened to fix the test pulleys. The central clamping device includes a sliding base (9), a slider (10) at the bottom of the sliding base is placed in the slide groove (2) of the worktable, a downward recessed groove is provided in the middle of the upper surface of the sliding base, a cover plate (11) is provided on the top of the sliding base, the cover plate is connected to the sliding base by bolts, the lower surface of the cover plate has a groove, and the groove on the lower surface of the cover plate corresponds to the groove on the upper surface of the sliding base.

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