Automobile rear suspension spring posture inspection tool and posture inspection method

Abstract

A posture inspection tool for automobile rear suspension springs and a posture inspection method thereof, the posture inspection tool comprising a base, a spring top positioning seat simulation, a shock absorber simulation, a support rod, a suspension lower arm simulation, and a spring bottom positioning seat simulation. The spring top positioning seat simulation, the shock absorber simulation, and the support rod are respectively fixed to the base, and the shock absorber simulation and the support rod are respectively arranged on opposite sides of the spring top positioning seat simulation; the size of the shock absorber simulation is consistent with the size of the real shock absorber, and the distance between it and the spring top positioning seat simulation is equal to the distance between the real shock absorber and the spring top positioning seat; the lower end of the suspension lower arm simulation is hingedly connected to the upper end of the support rod; the spring bottom positioning seat simulation is connected to the upper end of the suspension lower arm simulation. When the present invention is used in conjunction with a spring dynamometer, it can inspect the postures of the automobile rear suspension springs in different positions under real working conditions and whether they will interfere with the shock absorber.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile chassis, in particular to an inspection technology for automobile rear suspension springs. Background Art

[0002] Suspension coil springs are key components of a vehicle's chassis system, crucial for driving safety, ride comfort, and the vehicle's adaptability to complex road conditions. The proper functioning of the suspension springs is crucial for ensuring the vehicle's ride quality. Interference between the suspension springs and surrounding components during driving can cause unusual noises and even lead to spring breakage and failure, resulting in vehicle imbalance or tire punctures, potentially leading to accidents.

[0003] At present, the quality inspection methods for automobile rear suspension springs mainly include direct loading and other methods. The working state of automobile rear suspension springs during the inspection process is very different from its working state under actual working conditions. Therefore, the accuracy of the test results is relatively low, and it is difficult to check the posture of automobile rear suspension springs under actual working conditions (the spring posture of the trial spring mainly refers to the shape of the spring in each working state, the gap between the coils, etc.; the posture of the assembled spring refers to the shape of the spring after assembly with the whole vehicle, the space gap with the surrounding parts, the gap between the spring's own coils, etc.) and whether it will interfere with surrounding parts. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a posture inspection tool for automobile rear suspension springs, which can simulate the multi-link rear suspension of a passenger car. When used in conjunction with a spring dynamometer, it can simulate the real working environment of the rear suspension springs, so as to accurately check the postures of the automobile rear suspension springs in different positions under real working conditions and whether they will interfere with the shock absorber.

[0005] A further technical problem to be solved by the present invention is to provide a method for checking the posture of a rear suspension spring of an automobile, which can effectively detect whether the posture of the rear suspension spring of an automobile is good under simulated real working conditions and whether it will interfere with the shock absorber.

[0006] The posture inspection tool for the automobile rear suspension spring according to an embodiment of the present invention includes a base, a spring top positioning seat simulation component, a shock absorber simulation component, a support rod, a suspension lower arm simulation component and a spring bottom positioning seat simulation component; the spring top positioning seat simulation component, the shock absorber simulation component and the support rod are respectively fixed on the base, and the shock absorber simulation component and the support rod are respectively arranged on opposite sides of the spring top positioning seat simulation component; the outer diameter of the shock absorber simulation component is consistent with the outer diameter of the real shock absorber, and the distance between the shock absorber simulation component and the spring top positioning seat simulation component is equal to the distance between the real shock absorber and the real spring top positioning seat; the lower end of the suspension lower arm simulation component is hingedly connected to the upper end of the support rod, the spring bottom positioning seat simulation component is connected to the upper end of the suspension lower arm simulation component, and the swing radius of the spring bottom positioning seat simulation component is consistent with the swing radius of the real spring bottom positioning seat.

[0007] A method for checking the posture of a rear suspension spring of an automobile according to an embodiment of the present invention comprises the following steps:

[0008] Connect the base of the above-mentioned automobile rear suspension spring posture inspection tool to the lower reference surface of the spring dynamometer, and connect the upper fixing plate to the upper reference surface of the spring dynamometer;

[0009] Install the upper and lower ends of the rear suspension spring to be tested on the spring bottom end positioning seat simulation component and the spring top end positioning seat simulation component respectively, and check whether the rear suspension spring of the automobile interferes with the shock absorber simulation component. If interference occurs, the rear suspension spring of the automobile to be tested is deemed unqualified;

[0010] Control the spring dynamometer to drive the upper fixed plate to press down the rear suspension spring of the automobile to be inspected to a specified height, check whether the rear suspension spring of the automobile interferes with the shock absorber simulation component during the process of being compressed to the specified height, and measure the space gap between the rear suspension spring of the automobile and the shock absorber simulation component after the rear suspension spring of the automobile is compressed to the specified height. If interference occurs or the measured space gap is greater than the predetermined gap threshold, the rear suspension spring of the automobile to be inspected is judged to be unqualified.

[0011] The present invention has at least the following advantages:

[0012] 1. The automobile rear suspension spring posture inspection tool of the embodiment of the present invention can simulate the multi-link rear suspension of a passenger car. When used in conjunction with a spring dynamometer, it can simulate the stress conditions of the rear suspension spring under real working conditions. This allows accurate inspection of the posture of the automobile rear suspension spring in different positions under real working conditions and whether it will interfere with the shock absorber, thereby ensuring the manufacturing quality of the automobile coil spring.

[0013] 2. The embodiment of the present invention can realize full-stroke dynamic inspection of the posture of the rear suspension spring of an automobile, with a convenient inspection method and accurate inspection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a posture inspection tool for a rear suspension spring of an automobile according to an embodiment of the present invention is shown.

[0015] Figure 2 A schematic diagram shows a state of a posture inspection tool for a rear suspension spring of an automobile according to an embodiment of the present invention when used to inspect a rear suspension spring of an automobile.

[0016] Figure 3 Shows a working schematic diagram of a real car rear suspension spring. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] See also Figures 1 to 3 The posture inspection tool for the automobile rear suspension spring according to an embodiment of the present invention includes a base 1, a spring top positioning seat simulation part 2, a shock absorber simulation part 3, a support rod 4, a suspension lower arm simulation part 5 and a spring bottom positioning seat simulation part 6.

[0019] The spring top positioning seat simulator 2, the shock absorber simulator 3, and the support rod 4 are respectively fixed to the base 1. The shock absorber simulator 3 and the support rod 4 are respectively arranged on opposite sides of the spring top positioning seat simulator 2. In this embodiment, the base 1 is composed of a bottom plate, and the lower end of the support rod 4 is detachably connected to the bottom plate via a plurality of first bolts 41.

[0020] The outer diameter of the shock absorber simulation member 3 is consistent with the outer diameter of the real shock absorber 93. The distance between the shock absorber simulation member 3 and the spring top positioning seat simulation member 2 is equal to the distance between the real shock absorber 93 and the real spring top positioning seat 92. In this embodiment, the shock absorber simulation member is a hollow sleeve to reduce weight.

[0021] The lower end of the suspension lower arm simulator 5 is hingedly connected to the upper end of the support rod 4. The spring bottom end locating seat simulator 6 is connected to the upper end of the suspension lower arm simulator 5. The swing radius r1 of the spring bottom end locating seat simulator 6 is consistent with the swing radius r2 of the actual spring bottom end locating seat 96. The swing radius r1 of the spring bottom end locating seat simulator 6 is the distance between the bottom center of the spring bottom end locating seat simulator 6 and the swing center X1. The swing radius r2 of the actual spring bottom end locating seat 96 is the distance between the bottom center of the actual spring bottom end locating seat 96 and the swing center X2.

[0022] The plane defined by the swing center X1 of the spring bottom locating seat simulator 6, the swing top dead center of the characteristic point of the spring bottom locating seat simulator 6, and the swing bottom dead center of the characteristic point of the spring bottom locating seat simulator 6 coincides with the plane defined by the swing center X2 of the actual spring bottom locating seat 96, the swing top dead center H1 of the characteristic point of the actual spring bottom locating seat 96, and the swing bottom dead center L1 of the characteristic point of the actual spring bottom locating seat 96. The plane defined by the swing center X2 of the actual spring bottom locating seat 96, the swing top dead center of the characteristic point of the actual spring bottom locating seat 96, and the swing bottom dead center of the characteristic point of the actual spring bottom locating seat 96 can be obtained by a mapping method. In this embodiment, the characteristic point of the spring bottom locating seat simulator 6 is the bottom center of the spring bottom locating seat simulator 6, and the characteristic point of the actual spring bottom locating seat 96 is the bottom center of the actual spring bottom locating seat 96.

[0023] In this embodiment, the suspension lower arm simulator 5 is used to simulate an actual automobile suspension lower arm 95, while the spring top locating seat simulator 2 and the spring bottom locating seat simulator 6 are used to simulate actual spring top locating seat 92 and actual spring bottom locating seat 96, respectively. Unlike an actual automobile suspension, where the spring top locating seat 92 is located above the spring bottom locating seat 96, in this embodiment, the spring top locating seat simulator 2 is located below the spring bottom locating seat simulator 6.

[0024] In this embodiment, the suspension lower arm simulator 5 includes a rocker arm 51 and a mounting base 53. The lower end of the rocker arm 51 is hingedly connected to the upper end of the support rod 4. The central axis of the hinge axis is perpendicular to a plane defined by the swing center X1 of the spring bottom end locator simulator 6, the upper dead center of the swing of the characteristic point of the spring bottom end locator simulator 6, and the lower dead center of the swing of the characteristic point of the spring bottom end locator simulator 6. The upper end of the rocker arm 51 is detachably connected to the mounting base 53 via a plurality of second bolts 52. The spring bottom end locator simulator 6 is fixed to the mounting base 53.

[0025] In this embodiment, the spring top positioning seat simulation part 2 and the spring bottom positioning seat simulation part 6 are both rubber pads to protect the automobile rear suspension spring 9 to be inspected. The real spring bottom positioning seat 96 is also a rubber pad.

[0026] Furthermore, the mounting seat 53 has an upwardly opening cavity 530. The vehicle rear suspension spring posture inspection tool includes a roller 71 and a roller shaft 72. The two ends of the roller shaft 72 are respectively disposed on opposite sides of the cavity 530. The roller 71 is sleeved outside the roller shaft 72, and a portion of the roller 71 extends upwardly out of the cavity 520. The function of the roller 71 is to reduce the contact friction with the upper fixing plate 8. The upper fixing plate 8 is connected to the upper reference surface of the spring dynamometer (not shown) via multiple bolts. When inspecting the posture of the vehicle rear suspension spring 9, the upper fixing plate 8 applies downward pressure to the roller 71, causing the suspension lower arm simulator 5 to swing downward, thereby compressing the vehicle rear suspension spring 9 to be inspected.

[0027] The method for inspecting the posture of the automobile rear suspension spring using the aforementioned automobile rear suspension spring posture inspection tool comprises the following steps:

[0028] S1. Connect the base 1 of the automobile rear suspension spring posture inspection tool to the lower reference surface of the spring dynamometer, and connect the upper fixing plate 8 to the upper reference surface of the spring dynamometer;

[0029] S2. Install the upper and lower ends of the automobile rear suspension spring 9 to be inspected on the spring bottom positioning seat simulation component 6 and the spring top positioning seat simulation component 2, respectively (i.e., respectively sleeved outside the spring bottom positioning seat simulation component 6 and the spring top positioning seat simulation component 2), and check whether the automobile rear suspension spring 9 interferes with the shock absorber simulation component 3. If interference occurs, the automobile rear suspension spring 9 to be inspected is determined to be unqualified;

[0030] S3. Control the spring dynamometer to drive the upper fixed plate 8 to press down the rear suspension spring 9 of the automobile to be inspected to a specified height, check whether the rear suspension spring 9 of the automobile interferes with the shock absorber simulation component 3 during the process of being compressed to the specified height, and measure the space gap between the rear suspension spring 9 of the automobile and the shock absorber simulation component 3 after the rear suspension spring 9 of the automobile is compressed to the specified height. If interference occurs or the measured space gap is greater than a predetermined gap threshold, the rear suspension spring 9 of the automobile to be inspected is determined to be unqualified.

[0031] Furthermore, when the upper fixing plate 8 presses down the automobile rear suspension spring 9 to be inspected to a specified height, a feeler gauge is used to check the gap between each two adjacent spring coils of the automobile rear suspension spring to be inspected. If the feeler gauge cannot be inserted into the gap, the automobile rear suspension spring is judged to be unqualified.

[0032] The rear suspension springs assembled on a complete vehicle have numerous peripheral parts, making it difficult to inspect the posture of the rear suspension springs. In this embodiment, the swing radius of the spring bottom locator simulator 6 is consistent with the swing radius of the actual spring bottom locator 96. The plane defined by the swing center X1 of the spring bottom locator simulator 6, the top dead center of the swing of the characteristic point of the spring bottom locator simulator 6, and the bottom dead center of the swing of the characteristic point of the spring bottom locator simulator 6 is consistent with the plane defined by the swing center X2 of the actual spring bottom locator 96, the top dead center of the swing of the characteristic point of the actual spring bottom locator 96, and the bottom dead center of the swing of the characteristic point of the actual spring bottom locator 96. The rear suspension spring posture inspection tool of this embodiment can fully simulate the posture of the spring in various positions under actual operating conditions and inspect the spring individually. Furthermore, the downward stroke of the spring dynamometer can inspect the posture of the rear suspension spring of the vehicle throughout its entire travel from upward to downward jumps.

[0033] The above description further illustrates the present invention in conjunction with specific embodiments and the accompanying drawings. However, the present invention can obviously be implemented in a variety of other ways than those described herein. Those skilled in the art may generalize and deduce the methods based on actual use without departing from the scope of the present invention. Therefore, the contents of the above specific embodiments should not limit the scope of protection of the present invention.

Claims

1. A posture inspection tool for automobile rear suspension spring, characterized in that: Including the base, spring top locating seat simulation part, shock absorber simulation part, support rod, suspension lower arm simulation part and spring bottom locating seat simulation part; The spring top positioning seat simulation component, the shock absorber simulation component, and the support rod are respectively fixed to the base, and the shock absorber simulation component and the support rod are respectively arranged on opposite sides of the spring top positioning seat simulation component; the outer diameter of the shock absorber simulation component is consistent with the outer diameter of the real shock absorber, and the distance between the shock absorber simulation component and the spring top positioning seat simulation component is equal to the distance between the real shock absorber and the real spring top positioning seat; The lower end of the suspension lower arm simulation component is hingedly connected to the upper end of the support rod, and the spring bottom end positioning seat simulation component is connected to the upper end of the suspension lower arm simulation component. The swing radius of the spring bottom end positioning seat simulation component is consistent with the swing radius of the real spring bottom end positioning seat.

2. The posture inspection tool for automobile rear suspension spring according to claim 1, characterized in that: The plane jointly determined by the swing center of the spring bottom end locating seat simulation, the swing upper dead point of the characteristic point of the spring bottom end locating seat simulation, and the swing lower dead point of the characteristic point of the spring bottom end locating seat simulation is consistent with the plane jointly determined by the swing center of the real spring bottom end locating seat, the swing upper dead point of the characteristic point of the real spring bottom end locating seat, and the swing lower dead point of the characteristic point of the real spring bottom end locating seat.

3. The posture inspection tool for automobile rear suspension spring according to claim 2, characterized in that: The characteristic point of the spring bottom end locating seat simulation part is the bottom surface center of the spring bottom end locating seat simulation part, and the characteristic point of the real spring bottom end locating seat is the bottom surface center of the real spring bottom end locating seat.

4. The posture inspection tool for automobile rear suspension spring according to claim 1, characterized in that: The suspension lower arm simulation component includes a rocker arm and a mounting seat, wherein the lower end of the rocker arm is hingedly connected to the upper end of the support rod, and the upper end of the rocker arm is connected to the mounting seat; The spring bottom end positioning seat simulation component is fixed to the mounting seat.

5. The posture inspection tool for automobile rear suspension spring according to claim 4, characterized in that: The mounting seat has a concave cavity opening upward; The posture inspection tool for the automobile rear suspension spring includes a roller and a roller shaft. The two ends of the roller shaft are respectively arranged on the opposite sides of the cavity. The roller is sleeved outside the roller shaft, and a part of the roller extends upward outside the cavity.

6. The posture inspection tool for automobile rear suspension spring according to any one of claims 1 to 5, characterized in that: The spring top end positioning seat simulation part and the spring bottom end positioning seat simulation part are both rubber pads.

7. The posture inspection tool for automobile rear suspension spring according to claim 1, characterized in that: The shock absorber simulation part is a hollow sleeve.

8. The posture inspection tool for automobile rear suspension spring according to claim 1, characterized in that: The base is a bottom plate.

9. A method for checking the posture of a rear suspension spring of an automobile, characterized in that: The following steps are involved: Connecting the base of the posture inspection tool for the automobile rear suspension spring according to any one of claims 1 to 8 to the lower reference surface of a spring dynamometer, and connecting an upper fixing plate to the upper reference surface of the spring dynamometer; Install the upper and lower ends of the rear suspension spring to be tested on the spring bottom end positioning seat simulation component and the spring top end positioning seat simulation component respectively, and check whether the rear suspension spring of the automobile interferes with the shock absorber simulation component. If interference occurs, the rear suspension spring of the automobile to be tested is deemed unqualified; The spring dynamometer is controlled to drive the upper fixed plate to press down the rear suspension spring of the automobile to be inspected to a specified height, and check whether the rear suspension spring of the automobile interferes with the shock absorber simulation component during the process of being compressed to the specified height. After the rear suspension spring of the automobile is compressed to the specified height, the space gap between the rear suspension spring of the automobile and the shock absorber simulation component is measured. If interference occurs or the measured space gap is greater than a predetermined gap threshold, the rear suspension spring of the automobile to be inspected is determined to be unqualified.

10. The method for checking the posture of the automobile rear suspension spring according to claim 9, characterized in that: When the upper fixing plate presses down the automobile rear suspension spring to be inspected to a specified height, a feeler gauge is used to check the gap between each two adjacent spring coils of the automobile rear suspension spring to be inspected. If the feeler gauge cannot be inserted into the gap, the automobile rear suspension spring is judged to be unqualified.

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