Automatic smearing device for impact beam in tire impact test

Abstract

The utility model relates to the technical field of tire testing, in particular to a tire impact test impact beam automatic smearing device which comprises an impact beam, fixing bases are arranged on the two sides of the impact beam, a driving bearing and a driven bearing are arranged in the fixing bases respectively, a driving frame and a connecting rod are arranged on the driving bearing respectively, and the driving frame and the connecting rod are connected through a connecting rod. A rack is arranged at the tail end of the connecting rod, gear teeth meshed with the rack are arranged on the surface of the driven bearing, driven rods are arranged on the driven bearing, a smearing arm is hinged between the left driven rod and the right driven rod, the side, close to the impact beam, of the smearing arm is rotationally arranged on the fixed base, and a felt layer is arranged on the smearing arm. According to the utility model, the defects of manual smearing, time and labor waste and unsafety in the prior art are overcome, a new solution is provided for a real vehicle impact test due to the characteristics of low cost, high safety and easiness in operation, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire testing, in particular to an automatic smearing device for a tire impact test impact beam. Background Art

[0002] As the only direct and crucial point of contact between the vehicle and the road, automobile tires not only carry the vehicle's entire mass but are also directly linked to the efficiency of its power transmission and suspension systems. To adapt to and overcome complex and ever-changing road conditions and ensure high stability and safety during high-speed driving, emergency braking, cornering, and navigating various uneven surfaces, tires undergo a variety of tests, including braking performance, wet grip, and tire durability. Among these tests, the impact test on automobile wheels, a crucial component of this series, is crucial and cannot be underestimated.

[0003] The wheel impact test on a sedan simulates the impact of a vehicle under various road conditions. This test helps vehicle and tire manufacturers evaluate tire performance to ensure stable driving and braking under various conditions. Furthermore, this test accurately assesses tire performance in actual use, promptly identifying and optimizing potential design flaws, and helping vehicle manufacturers refine suspension system designs to enhance vehicle comfort and stability.

[0004] In real-vehicle impact tests, in order to simulate collision conditions in real road environments, a 45° inclined impact beam is usually used for relevant tests. Before the test, the testers will smear chalk or paint on the surface of the impact beam. After the impact is completed, it will leave marks on the tire surface, so that the testers can quickly confirm the impact location. At present, this method of marking the tire impact position leads to a lot of repetitive work, which is not only inefficient, but also time-consuming and labor-intensive, bringing a considerable burden to the testers. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, improve the marking process, increase experimental efficiency, and reduce the workload of experimenters, the utility model provides an automatic marking device for a tire impact test impact beam.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: an automatic coating device for an impact beam of a tire impact test, comprising an impact beam, fixed bases are provided on both sides of the impact beam, active bearings and passive bearings are respectively provided in the fixed bases, active frames and connecting rods are respectively provided on the active bearings, racks are provided at the ends of the connecting rods, gear teeth meshing with the racks are provided on the surface of the passive bearings, a passive rod is provided on the passive bearings, and a coating arm is hinged between the left and right passive rods, the coating arm is rotatably provided on the fixed base close to the side of the impact beam, and a felt layer is provided on the coating arm.

[0007] Furthermore, a groove is provided on the top of the fixed base, and a driving shaft and a passive shaft are respectively provided in the groove. The driving shaft is provided with the active bearing, and the passive shaft is provided with the passive bearing.

[0008] Furthermore, the horizontal height of the top of the active frame is higher than the top of the impact beam.

[0009] Furthermore, the included angle between the active frame and the connecting rod is an obtuse angle.

[0010] Furthermore, the rack is in an arc shape.

[0011] Furthermore, the transmission ratio between the surface teeth of the passive bearing and the gear is less than 1.

[0012] Furthermore, a rotating shaft is provided at the connection between the applicator arm and the fixed base, and a rotating bearing is provided on the rotating shaft.

[0013] Furthermore, the rotating shaft is arranged at the front end of the inner side wall of the fixed base.

[0014] Furthermore, the shape of the smear arm matches the shape of the impact beam.

[0015] Furthermore, the weight of the applicator arm is greater than the weight of the active frame.

[0016] The beneficial effects achieved by the utility model are:

[0017] The utility model applies pressure to the active frame by the tire passing over the active frame, so that the active frame passes through multi-stage transmission, and finally drives the coating arm to automatically apply powder to the impact beam, which solves the many disadvantages of manual coating in the past, which is time-consuming, labor-intensive and unsafe. With its low cost, high safety and easy operation, it provides a new solution for real vehicle impact test, abandons the backward method of manual coating, and adopts mechanical transmission to automatically and accurately complete the lime powder coating work, which greatly improves work efficiency, shortens the test cycle and increases the test frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the fixed base;

[0020] Figure 3 It is a diagram indicating the transmission relationship and movement direction between the active frame and the passive rod;

[0021] Figure 4 Paint the schematic diagram of the overall structure of the arm.

[0022] Explanation of the marks in the figure: 1. Impact beam; 2. Active frame; 3. Fixed base; 4. Active bearing; 5. Connecting rod; 6. Passive bearing; 7. Rack; 8. Passive rod; 9. Applicator arm; 10. Felt layer; 11. Rotary bearing. DETAILED DESCRIPTION

[0023] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of the tire impact test impact beam automatic smearing device of the present invention in conjunction with the accompanying drawings.

[0024] like Figures 1 to 4 As shown, an automatic smearing device for a tire impact test impact beam includes an impact beam 1, fixed bases 3 are provided on both sides of the impact beam 1, a groove is provided on the top of the fixed base 3, a driving shaft and a passive shaft are sequentially provided in the front and rear of the groove, the two ends of the driving shaft and the passive shaft are respectively fixed on the inner wall of the groove, an active bearing 4 is provided on the outside of the active shaft, the active bearing 4 is arranged on the active shaft with an interference fit, one side of the active bearing 4 is fixedly connected to an active frame 2, the active frame 2 connects the left and right active bearings 4 together, and the other side of the active bearing 4 is fixedly provided with a connecting rod 5. A rack 7 is fixedly provided at the end of the connecting rod 5. The extension direction of the rack 7 is horizontal and downward. A passive bearing 6 is provided on the passive shaft. The passive bearing 6 is interference fit on the passive shaft. The surface of the passive bearing 6 is provided with annular gear teeth. The gear teeth on the passive bearing 6 match the gear teeth on the rack 7. The rack 7 is an arc-shaped structure that matches the shape of the passive bearing 6. When the active frame 2 drives the connecting rod 5 to rotate, the connecting rod 5 drives the rack 7 to move. During the movement, the rack 7 always engages with the gear teeth on the passive bearing 6, driving the passive bearing 6 to rotate. A passive rod 8 is fixedly provided on the passive bearing 6. The end of the passive rod 8 is hinged to an applicator arm 9. The passive rod 8 is hinged to the middle of the side of the applicator arm 9. The applicator arm 9 is rotatably provided on the inner wall of the fixed base 3 on the left and right sides near the side of the impact beam 1. A felt layer 10 is provided above the applicator arm 9.

[0025] The fixed base 3 is a square structure as a whole. The groove on the top of the fixed base 3 is set in the middle position of the fixed base 3. Strong magnets are set on the opposite sides of the left and right fixed bases 3. The strong magnets tightly adsorb the fixed base 3 on the impact beam 1.

[0026] The front-to-back length of the fixed base 3 is greater than the front-to-back length of the impact beam 1. The front end face of the fixed base 3 is located in front of the front end face of the impact beam 1. The left and right fixed bases 3 protrude from the side walls of the front end face of the impact beam 1 and are both provided with rotating shafts. The left and right rotating shafts are at the same horizontal height. The rotating shafts are interference fit with rotating bearings 11. The rotating bearings 11 are respectively provided at both ends of the side of the coating arm 9 close to the impact beam 1. Driven by the passive rod 8, the coating arm 9 can make circular motion around the rotating shaft. The shape of the coating arm 9 matches the shape of the impact beam 1. When the coating arm 9 rotates and hits the impact beam 1, the felt layer 10 on the coating arm 9 can fit tightly against the impact beam 1, so that the coating material on the felt layer 10 can be completely attached to the impact beam 1. Here, the coating arm 9 is preferably a multi-fold surface structure.

[0027] The active shaft and the passive shaft in the groove of the fixed base 3 are at the same horizontal height. The angle formed between the active frame 2 and the connecting rod 5 is an obtuse angle. Under normal conditions, the horizontal height of the middle connecting rod of the active frame 2 is higher than the height of the top of the impact beam 1.

[0028] The tooth surface of the rack 7 fixedly connected to the connecting rod 5 meshes with the tooth surface on the passive bearing 6 to form a transmission mechanism. The transmission ratio between the passive bearing 6 and the rack 7 is less than 1, so that a smaller movement at one end of the active frame 2 can obtain a larger stroke on the passive rod 8, so that the rack 7 can easily drive the coating arm 9 to rotate 180 degrees, and apply the coating material on the felt layer 10 to the impact beam 1.

[0029] The weight of the coating arm 9 is greater than that of the active frame 2. Because of the presence of the felt layer 10, the coating arm 9 is not tightly attached to the impact beam 1, but is just in contact with it. Therefore, when the active frame 2 loses pressure, the coating arm 9 can rely on its own gravitational potential energy to fall back to its initial position.

[0030] When in use, lime powder is evenly applied on the felt layer 10, and the tester drives the vehicle to impact the impact beam 1. At the moment of impact, the tire first contacts the impact beam 1. After the impact, the tire continues to roll forward, leaves the impact beam 1, and presses on the active frame 2. The active frame 2 moves downward under the action of the tire gravity, and the active frame 2 drives the active bearing 4 to rotate counterclockwise, so that the connecting rod 5 and the rack 7 on the other side of the active bearing 4 rotate counterclockwise around the axis of the active bearing 4. Since the rack 7 has an arc and meshes with the passive bearing 6, it drives the passive bearing 6 to rotate. Since the transmission ratio is less than 1, the passive rod 8 obtains a larger stroke, and the passive rod 8 drives the coating arm 9 to move, so that the felt layer 10 with lime powder on the coating arm 9 is fully in contact with the impact beam 1. When the tire passes the active frame 2, the tire pressure on the active frame 2 disappears, and the coating arm 9 returns to its original position under the action of gravity, and reversely drags the active frame 2 back to its original position, and repeats this process to complete the powder coating work of the impact beam 1.

[0031] When marking the impact beam 1 for the first time, the tester evenly applies lime powder on the felt layer 10, then steps on the end of the active frame 2 with his foot. The active frame 2 moves downward under the action of pressure, and the applying arm 9 applies lime powder to the impact beam 1. Subsequent tires pass through the impact beam 1 and the active frame 2 in turn, and the impact beam 1 can be marked. When the marking on the impact beam 1 becomes lighter, the tester only needs to continue applying lime powder on the felt layer 10.

[0032] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. An automatic smearing device for a tire impact test beam, characterized by: The invention comprises an impact beam (1), wherein fixed bases (3) are provided on both sides of the impact beam (1), an active bearing (4) and a passive bearing (6) are respectively provided in the fixed bases (3), an active frame (2) and a connecting rod (5) are respectively provided on the active bearing (4), a rack (7) is provided at the end of the connecting rod (5), a gear tooth meshing with the rack (7) is provided on the surface of the passive bearing (6), a passive rod (8) is provided on the passive bearing (6), and an smearing arm (9) is hinged between the left and right passive rods (8), the smearing arm (9) is rotatably provided on the fixed base (3) close to the side of the impact beam (1), and a felt layer (10) is provided on the smearing arm (9).

2. The tire impact test beam automatic smearing device according to claim 1, characterized in that: A groove is provided on the top of the fixed base (3), and a driving shaft and a passive shaft are respectively provided in the groove. The driving shaft is provided with the driving bearing (4), and the passive shaft is provided with the passive bearing (6).

3. The tire impact test beam automatic smearing device according to claim 1, characterized in that: The horizontal height of the top of the active frame (2) is higher than the top of the impact beam (1).

4. The tire impact test beam automatic smearing device according to claim 1, characterized in that: The included angle between the active frame (2) and the connecting rod (5) is an obtuse angle.

5. The tire impact test beam automatic smearing device according to claim 1, characterized in that: The rack (7) is in an arc shape.

6. The tire impact test beam automatic smearing device according to claim 1, characterized in that: The transmission ratio between the surface teeth of the passive bearing (6) and the gear is less than 1.

7. The tire impact test beam automatic smearing device according to claim 1, characterized in that: A rotating shaft is provided at the connection between the application arm (9) and the fixed base (3), and a rotating bearing (11) is provided on the rotating shaft.

8. The tire impact test beam automatic smearing device according to claim 7, characterized in that: The rotating shaft is arranged at the front end of the inner side wall of the fixed base (3).

9. The tire impact test beam automatic smearing device according to claim 1, characterized in that: The shape of the smear arm (9) matches the shape of the impact beam (1).

10. The tire impact test beam automatic smearing device according to claim 1, characterized in that: The weight of the applicator arm (9) is greater than the weight of the active frame (2).

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