Non-regular impact shock test system for lightweight two-wheeled vehicle frame

Abstract

The application discloses a non-regular impact vibration test system of a light-weight two-wheeled frame, which comprises a bumping impact wheel, the bottom end of the rear wheel of the measured electric two-wheeled vehicle is in rolling tangential contact with the wheel surface of the upper end of the bumping impact wheel; the wheel surface of the bumping impact wheel is provided with a bumping tongue outlet extending in the radial direction, a bumping tongue extending in the radial direction of the rear wheel is movably arranged in the bumping tongue outlet, and the bumping tongue extends outwards from the bumping tongue outlet when the bumping tongue outlet faces upwards; in the final effect of the scheme, the rear wheel of the measured electric two-wheeled vehicle will be subjected to an impulse bumping impact of the bumping surface once, but the intensity of the impulse bumping impact is different each time, so that the purpose of non-regular vibration impact on the rear wheel is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of two-wheeled vehicle testing. BACKGROUND

[0002] When conducting a jolt shock endurance test on an electric two-wheeled vehicle, the general method is to install the electric two-wheeled vehicle under test in a loaded state on a durability test platform, and then roll the rear wheel with a jolter of a similar drum structure. During the rolling of the rear wheel with the jolter of a similar drum structure, the rear wheel of the electric two-wheeled vehicle under test will be subjected to periodic impulse impact vibration with consistent shock amplitude, thereby achieving the purpose of jolt shock endurance testing.

[0003] The impact strength of the jolter of a similar drum structure on the rear wheel of the two-wheeled vehicle is consistent each time. During the process of the two-wheeled vehicle under test being subjected to regular vibration and impact with consistent periodic strength, each component of the vehicle frame will have a spontaneous tendency to adapt to the regular vibration with consistent periodic strength, thereby entering a stable state, and the test result is often better than the actual situation. Since the impact strength of the two-wheeled vehicle in the actual driving process is always changing due to the jolt of the real road surface, this test method cannot reflect the actual working conditions. SUMMARY

[0004] The present application provides a non-regular impact shock test system for a lightweight two-wheeled vehicle frame to overcome the deficiencies in the prior art and to achieve the purpose of applying impact strength to the vehicle frame in a non-regular manner.

[0005] Technical solution: To achieve the above-mentioned purpose, the non-regular impact shock test system for a lightweight two-wheeled vehicle frame of the present application comprises a jolt impact wheel, the bottom end of the rear wheel of the electric two-wheeled vehicle under test is in rolling tangential contact with the upper end of the wheel surface of the jolt impact wheel; the wheel surface of the jolt impact wheel is provided with a jolt tongue extending port extending in the radial direction, and a jolt tongue extending in the radial direction of the rear wheel is movably arranged in the jolt tongue extending port; when the jolt tongue extending port is upward, the jolt tongue extends outward from the jolt tongue extending port.

[0006] Further, the jolt impact wheel has a disc cavity, the head end of the jolt tongue is a jolt surface, the tail end surface of the jolt tongue is in the disc cavity, the tail end of the jolt tongue is fixedly connected with two jolt tongue push rods extending in the radial direction of the jolt impact wheel, and a pair of guide holes are formed in the jolt impact wheel at the end away from the jolt tongue extending port in the radial direction, and the two jolt tongue push rods are movably arranged through the two guide holes, respectively.

[0007] Further, the distance between the two jolt tongue push rods is greater than the width of the rear wheel of the electric two-wheeled vehicle under test.

[0008] Further, the inner wall of the disc cavity is provided with a limiting stake, when the jolt surface of the head end of the jolt tongue coincides with the wheel surface of the upper end of the jolt impact wheel, the tail end surface of the jolt tongue is in limiting contact with the limiting stake.

[0009] The tongue push rod in the disc cavity is provided with a return spring, one end of the return spring is fixedly connected to the tail end surface of the tongue, and the other end is fixedly connected to the disc cavity, the return spring forms a return force on the tongue, so that the tail end surface of the tongue is in position contact with the limiting post.

[0010] Further, the ends of the two tongue push rods are rotatably installed with rollers through roller seats;

[0011] The lower side of the bumping impact wheel is coaxially provided with a circular arc rack, the circular arc rack and the bumping impact wheel are provided with an arc-shaped body, the convex surface of the arc-shaped body and the inner side surface of the circular arc rack are integrally fixed through a plurality of connecting pieces;

[0012] One side of the bumping impact wheel is fixedly connected with a rotating shaft, the rotating shaft is rotatably installed on a bearing seat through a bearing, and the bearing seat is fixedly connected with one side of the arc-shaped body; the concave surface of the arc-shaped body is a single-shaped rolling surface; the single-shaped rolling surface gradually moves away from the axis of the bumping impact wheel in the clockwise direction, the lowest point of the single-shaped rolling surface is recorded as a rolling surface low point, and the rolling surface low point is just below the axis of the bumping impact wheel; when the roller at the end of the tongue push rod is located below the bumping impact wheel, the roller at the end of the tongue push rod is in rolling cooperation with the single-shaped rolling surface.

[0013] Further, the distance between the axis of the bumping impact wheel and the clockwise end of the single-shaped rolling surface is recorded as L1, and the distance between the axis of the bumping impact wheel and the rolling surface low point is recorded as L2, wherein L1 is always greater than L2.

[0014] Further, when the arc-shaped body rotates clockwise around the axis of the bumping impact wheel, the rolling surface low point rises, so that L2 becomes smaller, and when the arc-shaped body rotates counterclockwise around the axis of the bumping impact wheel, the rolling surface low point descends, so that L2 becomes larger; no matter whether the arc-shaped body rotates clockwise or counterclockwise around the axis of the bumping impact wheel, L1 is always unchanged; when the roller at the end of the tongue push rod is in rolling cooperation with the clockwise end of the single-shaped rolling surface, the tail end surface of the tongue is in position contact with the limiting post.

[0015] Further, the system further comprises an adjusting gear, and the adjusting gear is in meshing connection with the circular arc rack.

[0016] Further, the working method of the irregular impact vibration test system of the lightweight two-wheeled vehicle frame drives the bumping impact wheel to rotate counterclockwise at a predetermined rotating speed;

[0017] At the same time, the adjusting gear is slowly and reversely rotated, and the adjusting gear and the circular arc rack are always in meshing connection.

[0018] Beneficial effect: In any rotation cycle of the bump impact wheel of the present invention during high-speed rotation, the length L3=L1-L2 of the bump tongue extending upward from the bump tongue extension opening is not fixed, which results in that every time the bump impact wheel rotates counterclockwise one circle, although the rear wheel of the electric two-wheeled vehicle under test will be subjected to a pulsed bumping impact of the bumping surface, the intensity of the pulsed bumping impact is different each time, thereby achieving the purpose of irregular vibration impact on the rear wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attachment Figure 1 This is a schematic diagram of the bottom end of the rear wheel of the tested electric two-wheeled vehicle and the wheel surface of the upper end of the bump impact wheel rolling tangent to each other;

[0020] Attachment Figure 2 For the attached Figure 1 A schematic diagram showing that the bottom end of the rear wheel of the tested electric two-wheeled vehicle is bounced upward once by the upwardly extending bounce tongue;

[0021] Attachment Figure 3 This is a schematic diagram of the three-dimensional structure of the rear wheel irregular bump impactor;

[0022] Attachment Figure 4 For attachment Figure 3 A sectional view from the perspective of the front view;

[0023] Attachment Figure 5 is a first cross-sectional view of a bump impact wheel;

[0024] Attachment Figure 6 is a second cross-sectional view of the bump impact wheel;

[0025] Attachment Figure 7 This is a schematic diagram of the rear wheel irregular bump impactor from another perspective. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] As attached Figures 1 to 7 The irregular impact vibration test system for a lightweight two-wheeled frame shown includes an electric two-wheeled vehicle under test, which is installed on a durability test platform in a loaded state; the tooling structure of the durability test platform is an existing structure and will not be described in detail in this solution.

[0028] like Figure 1 and Figure 2The rear wheel irregular bump impactor 51 on the durability test platform comprises a fixing support 24, the fixing support 24 is fixedly installed with a bump impact wheel motor 2, the output end of the bump impact wheel motor 2 is coaxially and drivingly connected with a bump impact wheel 2, the bottom end of the rear wheel 17 of the electric two-wheeled vehicle to be measured is in rolling tangential contact with the wheel surface 2.1 of the upper end of the bump impact wheel 2; the wheel surface 2.1 of the bump impact wheel 2 is provided with a bump tongue extending opening 5 extending in the radial direction, the bump tongue extending opening 5 is movably provided with a bump tongue 23 extending in the radial direction of the rear wheel 17, when the bump tongue extending opening 5 faces upward, the bump tongue 23 extends outward from the bump tongue extending opening 5, and the outwardly extending bump tongue 23 plays a role of impact bumping to the rear wheel 17 of the electric two-wheeled vehicle to be measured.

[0029] The bump tongue 23 is in sliding fit with the inner wall of the bump tongue extending opening 5; the bump impact wheel 2 is coaxially provided with a disc cavity 22, the head end of the bump tongue 23 is a bump surface 23.1, the tail end surface 23.2 of the bump tongue 23 is in the disc cavity 22, the tail end of the bump tongue 23 is fixedly connected with two bump tongue push rods 1 extending in the radial direction of the bump impact wheel 2, a pair of guide holes 20 penetrating in the radial direction are formed in the end of the bump impact wheel 2 away from the bump tongue extending opening 5, and the two bump tongue push rods 1 are movably arranged in the two guide holes 20 respectively. Figure 5 .

[0030] As shown in Figure 6 The distance 18 between the two bump tongue push rods 1 is greater than the width of the rear wheel 17 of the electric two-wheeled vehicle to be measured, when the electric two-wheeled vehicle to be measured is installed on the durability test platform, the rear wheel 17 of the electric two-wheeled vehicle to be measured is between the two bump tongue push rods 1, so that when the rear wheel 17 is in tangential rolling fit with the bump impact wheel 2, the two bump tongue push rods 1 do not interfere with the rear wheel 17 of the electric two-wheeled vehicle to be measured.

[0031] As shown in Figure 5 The inner wall of the disc cavity 22 is provided with a limiting post 53, when the bump surface 23.1 of the head end of the bump tongue 23 coincides with the wheel surface 2.1 of the upper end of the bump impact wheel 2, the tail end surface 23.2 of the bump tongue 23 is in limiting contact with the limiting post 53; the bump tongue push rod 1 in the disc cavity 22 is sleeved with a return spring 21, one end of the return spring 21 is fixedly connected with the tail end surface 23.2 of the bump tongue 23, the other end is fixedly connected with the disc cavity 22, the return spring 21 forms a return force on the bump tongue 23, so that the tail end surface 23.2 of the bump tongue 23 is in limiting contact with the limiting post 53; the limiting post 53 plays a role of preventing the bump tongue 23 from further retracting into the bump tongue extending opening 5.

[0032] The ends of the two tongue jacks 1 are rotatably installed with rollers 16 through roller seats 19; the lower side of the bumping impact wheel 2 is coaxially provided with a circular arc rack 10, and the circular arc rack 10 and the bumping impact wheel 2 are provided with an arc-shaped body 14, the convex surface of the arc-shaped body 14 and the inner side surface of the circular arc rack 10 are integrally fixed through a plurality of connecting pieces 9; further comprising an adjusting gear 12, the adjusting gear 12 is engaged with the circular arc rack 10, the adjusting motor 11 is fixedly installed on the fixed support 24, and the adjusting motor 11 drives the adjusting gear 12, so that the adjusting gear 12 can drive the integrated structure of the circular arc rack 10 and the arc-shaped body 14 to rotate along the axis of the roller 16.

[0033] One side of the bumping impact wheel 2 is fixedly connected with a rotating shaft 3, the rotating shaft 3 is rotatably installed on a bearing seat 13 through a bearing, and the bearing seat 13 is fixedly connected with one side of the arc-shaped body 14; so that the arc-shaped body 14 and the circular arc rack 10 can only rotate along the axis of the bumping impact wheel 2; the concave surface of the arc-shaped body 14 is a solitary raceway surface 15, the arc-shaped path of the solitary raceway surface 15 in the embodiment is a section of the isochronous spiral line, and the spiral center of the isochronous spiral line coincides with the axis of the bumping impact wheel 2, so that the solitary raceway surface 15 gradually moves away from the axis of the bumping impact wheel 2 in the clockwise direction, and a node at the lowest point of the solitary raceway surface 15 is marked as a raceway low point 15.1, which is just below the axis of the bumping impact wheel 2.

[0034] As shown in Figure 1 The distance between the axis of the bumping impact wheel 2 and the clockwise end of the solitary raceway surface 15 is marked as L1, and the distance between the axis of the bumping impact wheel 2 and the raceway low point 15.1 is marked as L2, wherein L1 is always greater than L2; when the arc-shaped body 14 rotates clockwise around the axis of the bumping impact wheel 2, the raceway low point 15.1 rises, so that L2 becomes smaller, and when the arc-shaped body 14 rotates counterclockwise around the axis of the bumping impact wheel 2, the raceway low point 15.1 descends, so that L2 becomes larger; no matter whether the arc-shaped body 14 rotates clockwise or counterclockwise around the axis of the bumping impact wheel 2, L1 is always unchanged.

[0035] When the roller 16 at the end of the tongue jack 1 is located below the bumping impact wheel 2, the roller 16 at the end of the tongue jack 1 rolls with the solitary raceway surface 15; when the roller 16 at the end of the tongue jack 1 rolls with the clockwise end of the solitary raceway surface 15, the tail end surface 23.2 of the tongue 23 limitingly contacts the limit pile 53.

[0036] Working principle:

[0037] Preparation work: the measured electric two-wheeled vehicle is installed on the durability test platform in a state of carrying a load, and the bottom end of the rear wheel 17 of the measured electric two-wheeled vehicle is in rolling tangential contact with the wheel surface 2.1 of the upper end of the bumping impact wheel 2; as Figure 1 shown;

[0038] Method of regular vibration impact on rear wheel 17:

[0039] Control the jolt impact wheel motor 2, and then drive the jolt impact wheel 2 to rotate counterclockwise at a predetermined speed, while the rear wheel 17 of the measured electric two-wheeled vehicle is driven to rotate by the wheel surface 2.1 of the jolt impact wheel 2;

[0040] Control the brake adjustment gear 12 to be stationary, and during the rotation of the jolt impact wheel 2: the arc-shaped body 14 remains in a stationary state, and in one counterclockwise rotation period of the jolt impact wheel 2, when the roller 16 at the end of the jolt push rod 1 is in rolling cooperation with the clockwise end of the arc-shaped rolling surface 15, the tail end surface 23.2 of the jolt tongue 23 is in limiting contact with the limiting post 53, and the jolt surface 23.1 at the head end of the jolt tongue 23 coincides with the upper end of the wheel surface 2.1 of the jolt impact wheel 2, the jolt tongue 23 is in an unextended state, as shown in Figure 1 ; as the jolt impact wheel 2 rotates counterclockwise, the roller 16 at the end of the jolt push rod 1 gradually rolls from the clockwise end of the arc-shaped rolling surface 15 to the rolling surface low point 15.1, and since L1 is greater than L2, when the roller 16 at the end of the jolt push rod 1 rolls to the rolling surface low point 15.1, the jolt tongue extension opening 5 is just upward, the jolt tongue 23 extends upward from the jolt tongue extension opening 5 by a length, as shown in Figure 2 , the length L3 of the jolt tongue 23 extending upward from the jolt tongue extension opening 5 is L1-L2; the jolt surface 23.1 of the jolt tongue 23 extending upward forms an upward pulse jolt impact on the rear wheel 17 of the measured electric two-wheeled vehicle, so that the rear wheel 17 of the measured electric two-wheeled vehicle will be subjected to a pulse jolt impact of the same strength once per counterclockwise rotation of the jolt impact wheel 2, and since the jolt impact wheel 2 is rotating at a high speed (more than five rotations per second), the rear wheel 17 of the measured electric two-wheeled vehicle will be subjected to periodic pulse impact vibration with consistent amplitude;

[0041] Method of irregular vibration impact on rear wheel 17:

[0042] Based on the above-mentioned "method of regular vibration impact on rear wheel 17", the following adjustments are made:

[0043] The control adjusting gear 12 is changed from the original brake static state to slowly forward and reverse rotation of the adjusting gear 12, so as to drive the circular arc rack 10 and the arc body 14 to slowly forward and reverse rotate along the axis of the bumping and impacting wheel 2, and ensure that the adjusting gear 12 and the circular arc rack 10 are always in meshing state; the meaning of "slow rotation" is that the rotation speed is controlled within 5° per minute, since when the arc body 14 rotates clockwise around the axis of the bumping and impacting wheel 2, the low point 15.1 of the raceway surface is raised, so that L2 is reduced, when the arc body 14 rotates counterclockwise around the axis of the bumping and impacting wheel 2, the low point 15.1 of the raceway surface is lowered, so that L2 is increased, while L1 is always unchanged; further causing that in any rotation period of the high-speed rotation of the bumping and impacting wheel 2, the length L3=L1-L2 of the upward extension of the bumping tongue 23 from the bumping tongue outlet 5 is not fixed, further leading to that although the rear wheel 17 of the measured electric two-wheeled vehicle will be subjected to a pulse bumping impact of the bumping surface 23.1 every counterclockwise rotation of the bumping and impacting wheel 2, the strength of the pulse bumping impact is not the same every time, so as to achieve the purpose of irregular vibration impact on the rear wheel 17.

[0044] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. Irregular impact and vibration testing system for lightweight two-wheeled vehicle frames, characterized by: The invention comprises a bump impact wheel (2), wherein the bottom end of the rear wheel (17) of the electric two-wheeled vehicle to be tested is in rolling contact with the wheel surface (2.1) of the upper end of the bump impact wheel (2); the wheel surface (2.1) of the bump impact wheel (2) is provided with a bump tongue protrusion opening (5) extending in a radial direction, and a bump tongue (23) extending in a radial direction of the rear wheel (17) is movably provided in the bump tongue protrusion opening (5); when the bump tongue protrusion opening (5) faces upward, the bump tongue (23) protrudes outward from the bump tongue protrusion opening (5); A disc cavity (22) is provided in the bumping impact wheel (2), a head end of the bumping tongue (23) is a bumping surface (23.1), a tail end surface (23.2) of the bumping tongue (23) is in the disc cavity (22), and the tail end of the bumping tongue (23) is fixedly connected to two bumping tongue push rods (1) both extending in the radial direction of the bumping impact wheel (2), a pair of guide holes (20) are passed through the end of the bumping impact wheel (2) away from the bumping tongue extension opening (5) in the radial direction, and the two bumping tongue push rods (1) respectively move through the two guide holes (20); The ends of the two tongue push rods (1) are both rotatably mounted with rollers (16) through roller seats (19); An arc rack (10) is coaxially arranged on the lower side of the bump impact wheel (2), an arc body (14) is arranged between the arc rack (10) and the bump impact wheel (2), and the convex surface of the arc body (14) and the inner side surface of the arc rack (10) are integrally fixed via a plurality of connecting pieces (9); One side of the bumping impact wheel (2) is fixedly connected to a rotating shaft (3) coaxially, and the rotating shaft (3) is rotatably mounted on a bearing seat (13) through a bearing, and the bearing seat (13) is fixedly connected to one side of the arc body (14); the concave surface of the arc body (14) is an arc-shaped raceway surface (15); the arc-shaped raceway surface (15) gradually moves away from the axis of the bumping impact wheel (2) in a clockwise direction, and a node at the lowest point on the arc-shaped raceway surface (15) is recorded as a raceway surface low point (15.1), and the raceway surface low point (15.1) is just below the axis of the bumping impact wheel (2); when the roller (16) at the end of the tongue push rod (1) is located below the bumping impact wheel (2), the roller (16) at the end of the tongue push rod (1) is in rolling cooperation with the raceway of the arc-shaped raceway surface (15).

2. The irregular impact and vibration testing system for a lightweight two-wheeled vehicle frame according to claim 1, characterized in that: The distance (18) between the two tongue-thrusting push rods (1) is greater than the width of the rear wheel (17) of the electric two-wheeled vehicle being tested.

3. The irregular impact and vibration testing system for a lightweight two-wheeled vehicle frame according to claim 2, characterized in that: A limiting pile (53) is provided on the inner wall of the disc cavity (22), and when the bumping surface (23.1) at the head end of the bumping tongue (23) coincides with the wheel surface (2.1) at the upper end of the bumping impact wheel (2), the tail end surface (23.2) of the bumping tongue (23) contacts the limiting pile (53). The tongue push rod (1) in the disc cavity (22) is covered with a return spring (21), one end of the return spring (21) is fixedly connected to the tail end surface (23.2) of the tongue (23), and the other end is fixedly connected to the disc cavity (22). The return spring (21) forms a return force on the tongue (23), so that the tail end surface (23.2) of the tongue (23) is limited to contact the limit pile (53).

4. The irregular impact and vibration testing system for a lightweight two-wheeled vehicle frame according to claim 3, characterized in that: The distance between the axis of the bump impact wheel (2) and the clockwise end of the arcuate raceway surface (15) is recorded as L1, and the distance between the axis of the bump impact wheel (2) and the low point (15.1) of the raceway surface is recorded as L2, wherein L1 is always greater than L2.

5. The irregular impact and vibration testing system for a lightweight two-wheeled vehicle frame according to claim 4, characterized in that: When the arc-shaped body (14) rotates clockwise around the axis of the bump impact wheel (2), the low point (15.1) of the raceway surface rises, causing L2 to decrease; when the arc-shaped body (14) rotates counterclockwise around the axis of the bump impact wheel (2), the low point (15.1) of the raceway surface drops, causing L2 to increase; regardless of whether the arc-shaped body (14) rotates clockwise or counterclockwise around the axis of the bump impact wheel (2), L1 remains unchanged; when the roller (16) at the end of the tongue push rod (1) rolls with the clockwise end of the arc-shaped raceway surface (15), the tail end surface (23.2) of the tongue (23) contacts the limit pile (53).

6. The irregular impact and vibration testing system for a lightweight two-wheeled vehicle frame according to claim 5, characterized in that: It also includes an adjusting gear (12), wherein the adjusting gear (12) is meshed with the circular arc rack (10).

7. The operating method of the irregular impact and vibration testing system for a lightweight two-wheeled vehicle frame according to claim 6, characterized in that: driving the bump impact wheel (2) to rotate counterclockwise at a predetermined speed; At the same time, the adjusting gear (12) slowly rotates forward and backward, and ensures that the adjusting gear (12) and the arc rack (10) are always in a meshing state.

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