Spring matching method and tool for vehicle suspension system and test vehicle

Abstract

The invention discloses a spring matching method for a vehicle suspension system, comprising: installing a telescopic rod 1 in a suspension system of a test vehicle for bearing a load of the test vehicle (S1); adjusting the test vehicle and the telescopic rod 1 to a standard test state, and adjusting the telescopic rod 1 to a predetermined length according to a predetermined vehicle height of the test vehicle (S2); detecting a test axial force applied to the telescopic rod 1 due to a load bearing the test vehicle in the standard test state (S3); and selecting a corresponding spring (S4) based on the test axial force and the predetermined length. The invention further discloses a spring matching tool for the vehicle suspension system and a test vehicle. According to some exemplary embodiments of the invention, the springs can be selected and matched quickly and efficiently, the labor cost can be saved, and adverse effects on a tested vehicle can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, in particular to the field of vehicle suspension systems. Background Art

[0002] Modern vehicles generally have suspension systems, which are mainly used for vehicle shock absorption so that the vehicle can travel smoothly even on bumpy roads. In order to ensure that the vehicle's suspension system has excellent shock absorption performance, it is necessary to select suitable springs for the vehicle's suspension system. Different vehicles have different performance requirements for shock absorption springs due to differences in vehicle height and load. In particular, the influence of spring stiffness parameters on shock absorption performance is particularly important. Therefore, it is necessary to reasonably select springs with appropriate performance, especially appropriate stiffness. However, in the prior art, whether the performance of the springs selected during vehicle testing meets the actual application requires manual replacement of the selected springs in sequence, and then driving the vehicle to verify whether the spring stiffness is suitable. Replacing shock absorption springs on a vehicle is a very cumbersome process, and multiple replacements of shock absorption springs will have adverse effects on the vehicle.

[0003] Therefore, it is desired to provide a spring matching method for a vehicle suspension system, which does not require frequent disassembly and assembly of shock-absorbing springs and can quickly and efficiently match springs, thereby saving labor costs and avoiding adverse effects on the test vehicle. Summary of the Invention

[0004] In order to overcome one of the above-mentioned shortcomings and / or other possible shortcomings of the prior art not mentioned herein, an object of the present invention is to provide a spring matching method for a vehicle suspension system, a spring matching tool for a vehicle suspension system, and a test vehicle.

[0005] According to one aspect of the present invention, a spring selection method for a vehicle suspension system is provided, comprising: S1) installing a telescopic rod 1 in the suspension system of a test vehicle for carrying the load of the test vehicle; S2) adjusting the test vehicle and the telescopic rod 1 to a standard test state, wherein the telescopic rod 1 is adjusted to a predetermined length according to a predetermined vehicle height of the test vehicle; S3) detecting a test axial force to which the telescopic rod 1 is subjected due to carrying the load of the test vehicle in the standard test state; and S4) selecting a corresponding spring based on the test axial force and the predetermined length.

[0006] According to an optional embodiment of the present invention, step S4 includes: compressing the spring to be selected so that the axial force applied to the spring is the same as the test axial force, and detecting the length of the spring after compression; if the compressed length matches the predetermined length, the spring is selected.

[0007] According to an optional embodiment of the present invention, the telescopic rod 1 is installed in the suspension system of the test vehicle instead of the original spring in the test vehicle; and the spring is a coil spring.

[0008] According to an optional embodiment of the present invention, the standard test state further includes at least: the load of the test vehicle is a predetermined load; and the predetermined vehicle height and predetermined load are pre-set according to the static vehicle height and static load of the specific vehicle model to which the spring is selected.

[0009] According to an optional embodiment of the present invention, the load of the test vehicle includes the vehicle's own weight and the weight of the additional load.

[0010] According to an optional embodiment of the present invention, the telescopic rod 1 is a screw, preferably a ball screw.

[0011] According to an optional embodiment of the present invention, in step S4, a tension-compression testing machine is used to compress the spring, and the axial force applied to the spring is detected.

[0012] According to a second aspect of the present invention, a spring matching tool for a vehicle suspension system is provided, comprising: a telescopic rod 1, which is installed in the suspension system of a test vehicle, is used to carry the load of the test vehicle, and can be adjusted to a predetermined length according to a predetermined vehicle height of the test vehicle; and a load sensor 2, which is used to detect the test axial force applied to the telescopic rod 1 due to carrying the load of the test vehicle under standard test conditions.

[0013] According to an optional embodiment of the present invention, the lower end of the telescopic rod 1 is connected to the load sensor 2 via a thread, and the load sensor 2 is preferably a tension or pressure sensor.

[0014] According to a third aspect of the present invention, there is provided a test vehicle comprising a spring fitting device for a vehicle suspension system.

[0015] According to certain exemplary embodiments of the present invention, the stiffness of the spring can be quickly and efficiently selected, which not only saves labor costs but also avoids adverse effects on the test vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described in more detail below with reference to the accompanying drawings, so that the principles, features and advantages of the present invention can be better understood. The accompanying drawings include:

[0017] Figure 1 A flow chart illustrating a spring matching method for a vehicle suspension system according to an exemplary embodiment of the present invention is shown.

[0018] Figure 2A spring selection tool for a vehicle suspension system and a test vehicle having the tool are shown according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of protection of the present invention.

[0020] The vehicle described in the present invention can be a fuel vehicle or a new energy vehicle, a small passenger car, or a large van or truck, etc. The vehicle suspension system described in the present invention includes the suspension systems at the front axle and rear axle positions of the vehicle.

[0021] Figure 1 A flow chart of a spring matching method for a vehicle suspension system according to an exemplary embodiment of the present invention is shown. The spring matching method comprises at least steps S1, S2, S3 and S4.

[0022] In step S1, a telescopic rod 1 is installed in the suspension system of a test vehicle to carry the test vehicle's load. The test vehicle can be a test vehicle specifically provided for performance testing, a for-sale vehicle requiring installation of an adapted suspension system and springs, or a private vehicle requiring an upgrade to its suspension system and springs. The telescopic rod 1 is an adjustable length support rod capable of withstanding axial forces. Once adjusted to the desired length, it remains fixed, allowing the test vehicle's load to be carried. The telescopic rod 1 can be a screw, preferably a ball screw. In practice, the test vehicle's suspension system may already have springs and spring support mounts. The telescopic rod 1 can be installed in the suspension system to replace the existing springs. The lower end of the telescopic rod 1 is fixed to the suspension system's spring support mount, while the upper end is supported by a corresponding spring support mount 3 on the vehicle frame. This allows the telescopic rod 1 to replace the test vehicle's existing shock-absorbing springs and carry the test vehicle's load. The telescopic rod 1 can be easily adjusted in length according to actual needs. This eliminates the need to sequentially replace and test different springs under different simulated test conditions, saving time and avoiding the potential adverse effects of frequent disassembly and assembly of the shock-absorbing spring on the vehicle. Furthermore, the spring can be a coil spring, a type of spring widely used for shock absorption in vehicle suspension systems. Therefore, the selection method of the present invention has broad versatility.

[0023] Optionally, the telescopic rod 1 is a screw, preferably a ball screw. By means of the self-locking function of the ball screw and its nut, the telescopic ball screw can be well maintained at a fixed length even when subjected to a large axial force.

[0024] Optionally, the test vehicle load includes the vehicle's own weight and may also include an additional load. In practice, when selecting spring stiffness, the diverse application scenarios of different vehicle models require comprehensive consideration of both empty and fully loaded vehicle conditions. The additional load includes the weight of passengers and / or cargo in the test vehicle.

[0025] In step S2, the test vehicle and telescopic rod 1 are adjusted to a standard test state, wherein the telescopic rod 1 is adjusted to a predetermined length based on the predetermined vehicle height of the test vehicle. The upper end of the telescopic rod 1 is supported on a corresponding spring support seat 3 on the vehicle frame, thereby supporting the test vehicle load and maintaining the vehicle body at the predetermined height. Due to different application scenarios for spring selection, in particular, the vehicle height and load of the specific vehicle model to which the spring is selected vary. Therefore, to match the actual application scenario, the test vehicle and telescopic rod 1 need to be adjusted to the standard test state based on the relevant parameters of the specific vehicle model to which the spring is selected. Specifically, the standard test state at least includes adjusting the telescopic rod 1 to a predetermined length based on the predetermined vehicle height of the test vehicle and adjusting the test vehicle load to a predetermined load. The predetermined vehicle height and predetermined load are both known parameters that are easily obtained in advance and can be pre-set based on the static vehicle height and static load of the specific vehicle model to which the spring is selected. The predetermined length refers to the length required for the telescopic rod 1 to effectively support the test vehicle load when the test vehicle is at the known predetermined height.

[0026] In step S3, the test axial force exerted on the telescopic rod 1 by carrying the test vehicle's load under the standard test condition is detected. Due to the installation method and position of the telescopic rod 1, the telescopic rod 1 can effectively simulate the force exerted by a spring in the vehicle's suspension system. Since the telescopic rod 1 carries the test vehicle's load, it is primarily affected by the axial force. The test axial force exerted on the telescopic rod 1 can be detected by the load sensor 2, and the detected test axial force can be recorded and stored. Alternatively, the load sensor 2 can be a tension or compression sensor.

[0027] In step S4, a corresponding spring is selected based on the test axial force and the predetermined length. In practice, if the performance parameters of the spring are complete and accurate, the performance parameters of the spring to be selected can be compared to select a spring that matches the test axial force and the predetermined length.

[0028] In practice, in many cases, it is difficult to ensure that the performance parameters of the spring are complete and accurate. Optionally, the selection of the corresponding spring based on the test axial force and the predetermined length can be specifically as follows: compress the spring to be selected so that the axial force applied to the spring is the same as the test axial force, and detect the length of the spring after compression. If the compressed length matches the predetermined length, the spring is selected. In this case, it is unknown whether the stiffness of the spring to be selected is suitable for the corresponding vehicle. However, according to the physical properties of the spring, when the spring is subjected to an axial force, its expansion and contraction length is related to its own stiffness. Springs of different stiffness have different expansion and contraction lengths when subjected to the same axial force. Accordingly, when subjected to the same axial force, if the expansion and contraction length of the spring meets the requirements of the actual application, it can be considered that the stiffness of the spring is also suitable for the actual application. Therefore, given that the test axial force of the telescopic rod 1 has been detected in step S3, the spring to be selected is compressed to apply an axial force equal to the test axial force. The length of the spring after compression is then measured and compared with the predetermined length of the telescopic rod 1. If the two lengths are identical or match, the spring stiffness is considered compatible with the actual application scenario simulated by the test vehicle. If they do not match, the spring stiffness is considered unsuitable for the actual application scenario simulated by the test vehicle. Specifically, the length of the compressed spring can match the predetermined length of the telescopic rod 1 within an acceptable error range based on engineering practice; for example, a length difference within a range of 5 mm can be considered identical and compatible. Alternatively, a tension-compression testing machine can be used to compress the spring and measure the axial force applied to the spring. The spring to be selected can be vertically mounted in the tension-compression testing machine and compressed vertically to apply the axial force until the axial force applied to the spring to be selected is identical to or close to the test axial force obtained in step S3.

[0029] Figure 2 A spring selection tool for a vehicle suspension system and a test vehicle having the tool are shown according to an exemplary embodiment of the present invention.

[0030] The present invention discloses a spring selection tool for a vehicle suspension system, which comprises:

[0031] A telescopic rod 1 is installed in the suspension system of the test vehicle, is used to bear the load of the test vehicle, and can be adjusted to a predetermined length according to the predetermined vehicle height of the test vehicle;

[0032] The load sensor 2 is used to detect the axial force applied to the telescopic rod 1 under a standard test state.

[0033] Optionally, the telescopic rod 1 is a ball screw, which is conducive to adjusting the length of the telescopic rod and can maintain the length of the telescopic rod through a self-locking function.

[0034] Optionally, the lower end of the telescopic rod 1 is connected to a load sensor 2 via a thread, which is conducive to reliably detecting the test axial force applied to the telescopic rod 1. Preferably, the load sensor 2 is a tension and pressure sensor.

[0035] The present invention also discloses a test vehicle, which may be an experimental vehicle specially provided for performance testing and includes a spring selection tool for a vehicle suspension system.

[0036] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative, not limiting, unless otherwise expressly stated. In specific implementations, multiple features can be combined with each other where technically feasible, depending on actual needs. Various substitutions, changes, and modifications are also contemplated without departing from the spirit and scope of the present invention.

Claims

1. A spring selection method for a vehicle suspension system, comprising: S1) installing a telescopic rod (1) in a suspension system of a test vehicle to bear the load of the test vehicle; S2) adjusting the test vehicle and the telescopic rod (1) to a standard test state, wherein the telescopic rod (1) is adjusted to a predetermined length according to a predetermined vehicle height of the test vehicle; S3) detecting the test axial force to which the telescopic rod (1) is subjected when carrying the load of the test vehicle under the standard test state; and S4) Selecting a corresponding spring based on the test axial force and the predetermined length.

2. The spring matching method according to claim 1, characterized in that: The step S4 includes: compressing the spring to be selected so that the axial force applied to the spring is the same as the test axial force, and detecting the length of the spring after compression. If the length after compression matches the predetermined length, the spring is selected.

3. The spring matching method according to claim 1, characterized in that: The telescopic rod (1) is installed in the suspension system of the test vehicle instead of the original spring in the test vehicle; and The spring is a coil spring.

4. The spring matching method according to any one of claims 1 to 3, characterized in that: The standard test state further includes at least: the load of the test vehicle is a predetermined load; and The predetermined vehicle height and the predetermined load are preset according to the static vehicle height and the static load of the specific vehicle type to which the spring is selected.

5. The spring matching method according to claim 4, characterized in that: The load of the test vehicle includes the vehicle's own weight and the weight of the additional load.

6. The spring matching method according to any one of claims 1 to 5, characterized in that: The telescopic rod (1) is a screw, preferably a ball screw.

7. The spring matching method according to any one of claims 1 to 6, characterized in that: In step S4, the spring is compressed using a tension and compression testing machine, and the axial force applied to the spring is tested.

8. A spring selection tool for a vehicle suspension system, comprising: A telescopic rod (1) is installed in the suspension system of a test vehicle, is used to bear the load of the test vehicle, and can be adjusted to a predetermined length according to a predetermined vehicle height of the test vehicle; and The load sensor (2) is used to detect the test axial force exerted on the telescopic rod (1) due to the load of the test vehicle under the standard test state.

9. The spring matching tool according to claim 8, wherein: The lower end of the telescopic rod (1) is connected to the load sensor (2) via a thread, and the load sensor (2) is preferably a tension and pressure sensor.

10. A test vehicle comprising the spring matching tool for a vehicle suspension system according to claim 8 or 9.

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