Foam-molded EPP (Expanded Polypropylene) automobile bumper structure

Abstract

The utility model discloses a foam-molded EPP (Expanded Polypropylene) automobile bumper structure, which belongs to the technical field of automobile bumpers, and comprises an outer baffle plate, a buffer mechanism I fixedly connected to the rear end of the outer baffle plate, an inner baffle plate fixedly connected to the rear end of the buffer mechanism I, and two buffer mechanisms III fixedly connected to the rear end of the inner baffle plate, the rear portions of the two third buffering mechanisms are jointly and fixedly connected with a connecting plate, the rear end of the outer baffle is fixedly connected with four second buffering mechanisms, the three buffering mechanisms are matched with one another to play a role or play a role independently under impact of different strengths, impact force generated during impact can be buffered to a great extent, and the service life of the device is prolonged. According to the bumper structure, the EPP material is used for foaming forming, the material has very excellent shock resistance and energy absorption performance, the recovery rate after deformation is high, and the heat resistance, chemical resistance, oil resistance and heat insulation performance are good, the self weight is reduced, meanwhile, the buffering and shock absorption functions are achieved, and the practicability of the bumper structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile bumpers, and more specifically to a foamed EPP automobile bumper structure. Background Art

[0002] Bumpers have the functions of safety protection, vehicle decoration, and improving the aerodynamic characteristics of vehicles. From a safety perspective, they can play a buffering role in the event of a low-speed collision and protect the front and rear bodies of the car; they can also play a certain role in protecting pedestrians in the event of an accident with pedestrians. From an appearance perspective, they are decorative and have become an important component for decorating the appearance of cars. Many years ago, the front and rear bumpers of cars were mainly made of metal materials. They were stamped into U-shaped channel steels with a thickness of more than 3 mm, and the surface was chrome-plated. They were riveted or welded to the longitudinal beams of the frame. There was a large gap between them and the car body, and they looked like an attached component that was very unsightly. With the development of the automobile industry and the extensive application of engineering plastics in the automobile industry, automobile bumpers, as an important safety device, have also taken the road of innovation. At present, in addition to maintaining the original protection function, the front and rear bumpers of cars also pursue harmony and unity with the body shape and pursue their own lightweight. The front and rear bumpers of cars are made of plastic, which people call plastic bumpers.

[0003] Chinese Patent Authorization Announcement No.: CN205395992U provides a car bumper structure, which makes the bumper body and the skirt fit without gap in the vertical direction through the lower side wall of the retreat part and the ridged boss, thereby improving the fitting accuracy, making the overall structure more stable and the connection more reliable; the buckle structure is divided into an upper clamping part and a lower clamping part, which fits more closely with the clamping hole, and the lower clamping part is constructed as an elastic part, which is easy to assemble, and the buckle structure is difficult to loosen from the clamping hole during driving, so the overall structure is more stable and the quality of the whole vehicle is improved. However, the following defects still exist in the specific implementation process: the bumper lacks a buffer and shock-absorbing structure and the material cannot effectively absorb energy, which will be very dangerous in the event of a collision.

[0004] Therefore, in view of the above problems, a foam-molded EPP automobile bumper structure is proposed. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a foamed EPP automobile bumper structure, which can achieve the function of buffering and shock absorption.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A foam-molded EPP automobile bumper structure comprises an outer baffle plate, a buffer mechanism 1 is fixedly connected to the rear end of the outer baffle plate, an inner baffle plate is fixedly connected to the rear end of the buffer mechanism 1, two buffer mechanisms 3 are fixedly connected to the rear end of the inner baffle plate, a connecting plate is fixedly connected to the rear ends of the two buffer mechanisms 3, and four buffer mechanisms 2 are fixedly connected to the rear end of the outer baffle plate.

[0010] Furthermore, the buffer mechanism 2 includes a slide, the inner surface of which is slidably connected to a buffer component 1, and the rear end of the slide is fixedly connected to a spring 1.

[0011] Furthermore, the buffer component 1 includes a connecting plate, the front end of which is fixedly connected to a cylindrical shell, the inner cavity of the cylindrical shell is slidably connected to a push plate, the rear end of the push plate is fixedly connected to a spring 2, and the front end of the push plate is fixedly connected to a push rod.

[0012] Furthermore, the front end of the push rod is fixedly connected to the rear end of the outer baffle, the rear end of the connecting plate is fixedly connected to the front end of the connecting plate, and the outer surface of the cylindrical shell is slidably connected to the inner surface of the sliding plate.

[0013] Furthermore, the buffer mechanism three includes two positioning plates, the rear ends of the two positioning plates are fixedly connected to the front end of the connecting plate, the ends of the two positioning plates close to each other are commonly fixedly connected with a sliding rod, the outer surface of the sliding rod is sleeved with a spring three, and the outer surface of the sliding rod is slidably connected to two buffer components two.

[0014] Furthermore, the buffer component 2 includes a connecting block, the upper and lower walls of the inner cavity of the connecting block are rotatably connected to a rotating shaft, the outer surface of the rotating shaft is fixedly connected to a connecting rod, the inner surface of the rear end of the connecting rod is rotatably connected to a rotating head, and the rear end of the rotating head is fixedly connected to a sliding block.

[0015] Furthermore, the ends of the two sliders that are close to each other are fixedly connected to the left and right ends of the spring three respectively, the inner surfaces of the two sliders are slidably connected to the outer surface of the slide rod, and the front ends of the two connecting blocks are fixedly connected to the rear end of the inner baffle.

[0016] Furthermore, the buffer mechanism 1 includes two mounting plates, the ends of the two mounting plates that are away from each other are respectively fixedly connected to the rear end of the outer baffle plate and the front end of the inner baffle plate, the ends of the two mounting plates that are close to each other are fixedly connected to silicone plate 1, the ends of the two silicone plates 1 that are close to each other are fixedly connected to buffer tubes, and the ends of the two buffer tubes that are close to each other are commonly fixedly connected to silicone plate 2.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] This solution uses three buffer mechanisms to work together or individually under collisions of different intensities, which can greatly buffer the impact force generated during the collision and effectively ensure the safety of drivers and passengers.

[0020] This solution provides a buffer mechanism between the outer baffle plate, the inner baffle plate and the connecting plate, so that the outer baffle plate and the inner baffle plate can be deformed when impacted, so that the compression spring can absorb part of the impact kinetic energy, thereby improving the practicality of the bumper structure.

[0021] The outer and inner baffles of this solution are formed by foaming EPP material, which has excellent shock-resistant energy absorption performance, high recovery rate after deformation, good heat resistance, chemical resistance, oil resistance and heat insulation. At the same time, it can also reduce the weight of the car. When the car is hit, it can better reduce the impact force, reduce the damage to the people in the car, and improve the safety of the bumper structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a second schematic diagram of the buffer mechanism of the utility model;

[0024] Figure 3 This is a schematic diagram of a buffer component of the utility model;

[0025] Figure 4 The third schematic diagram of the buffer mechanism of the utility model;

[0026] Figure 5 This is a second schematic diagram of a buffer assembly of the present utility model;

[0027] Figure 6 It is a schematic diagram of a buffer mechanism of the present utility model.

[0028] Description of the numbers in the figure:

[0029] 1. Outer baffle plate; 2. Buffer mechanism one; 21. Mounting plate; 22. Silicone plate one; 23. Buffer tube; 24. Silicone plate two; 3. Buffer mechanism two; 31. Slide; 32. Spring one; 33. Buffer component one; 331. Connecting plate; 332. Cylindrical shell; 333. Push plate; 334. Push rod; 335. Spring two; 4. Inner baffle plate; 5. Buffer mechanism three; 51. Positioning plate; 52. Slide rod; 53. Spring three; 54. Buffer component two; 541. Connecting block; 542. Rotating shaft; 543. Connecting rod; 544. Rotating head; 545. Slider; 6. Connecting plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Example:

[0034] See also Figure 1-6 A foamed EPP automobile bumper structure comprises an outer baffle plate 1, a buffer mechanism 2 is fixedly connected to the rear end of the outer baffle plate 1, an inner baffle plate 4 is fixedly connected to the rear end of the buffer mechanism 2, two buffer mechanisms 3 5 are fixedly connected to the rear end of the inner baffle plate 4, a connecting plate 6 is fixedly connected to the rear ends of the two buffer mechanisms 3 5, and four buffer mechanisms 2 3 are fixedly connected to the rear end of the outer baffle plate 1.

[0035] In this solution, the outer baffle plate 1 is protected by a buffer mechanism 1 2 and four buffer mechanisms 2 3 to buffer the impact force received by the outer baffle plate 1, and the inner baffle plate 4 is protected by two buffer mechanisms 3 5 and four buffer mechanisms 2 3 to buffer the impact force received by the inner baffle plate 4. Both the outer baffle plate 1 and the inner baffle plate 4 are foamed and molded from EPP material, which itself has good anti-vibration and energy absorption characteristics. The connecting plate 6 is used to connect the bumper structure to the vehicle body.

[0036] See also Figure 2-3The buffer mechanism 23 includes a slide 31, the inner surface of the slide 31 is slidably connected with a buffer component 1 33, the rear end of the slide 31 is fixedly connected with a spring 1 32, the buffer component 1 33 includes a connecting piece 331, the front end of the connecting piece 331 is fixedly connected with a cylindrical shell 332, the inner cavity of the cylindrical shell 332 is slidably connected with a push plate 333, the rear end of the push plate 333 is fixedly connected with a spring 2 335, the front end of the push plate 333 is fixedly connected with a push rod 334, the front end of the push rod 334 is fixedly connected to the rear end of the outer baffle 1, the rear end of the connecting piece 331 is fixedly connected to the front end of the connecting plate 6, and the outer surface of the cylindrical shell 332 is slidably connected to the inner surface of the slide 31.

[0037] In this solution, the outer baffle plate 1 squeezes the four push rods 334 inward to move it backward. When the impact force is relatively light, the four push rods 334 will push the push plate 333 to squeeze the spring 2 335 backward to shrink it. After the impact, the external force disappears, and the outer baffle plate 1 will return to its original position under the action of the spring 2 335. When the impact is slightly larger, the outer baffle plate 1 moves backward and moves the inner baffle plate 4 together. When the inner baffle plate 4 moves to against the sliding plate 31, continuing to move backward will allow the sliding plate 31 to slide backward on the outer surface of the cylindrical shell 332, compressing the spring 1 32. After the impact, the external force disappears, and the outer baffle plate 1 and the inner baffle plate 4 will return to their initial positions under the action of the spring 1 32 and the spring 2 335.

[0038] See also Figure 4-5 The buffer mechanism three 5 includes two positioning plates 51, the rear ends of the two positioning plates 51 are fixedly connected to the front end of the connecting plate 6, the ends of the two positioning plates 51 close to each other are fixedly connected with a sliding rod 52, the outer surface of the sliding rod 52 is sleeved with a spring three 53, and the outer surface of the sliding rod 52 is slidably connected with two buffer components two 54, the buffer component two 54 includes a connecting block 541, the upper and lower walls of the inner cavity of the connecting block 541 are rotatably connected with a rotating shaft 542, the outer surface of the rotating shaft 542 is fixedly connected with a connecting rod 543, the inner surface of the rear end of the connecting rod 543 is rotatably connected with a rotating head 544, and the rear end of the rotating head 544 is fixedly connected with a slider 545, the ends of the two sliders 545 close to each other are respectively fixedly connected to the left and right ends of the spring three 53, the inner surfaces of the two sliders 545 are slidably connected to the outer surface of the sliding rod 52, and the front ends of the two connecting blocks 541 are fixedly connected to the rear end of the inner baffle 4.

[0039] In this solution, the inner baffle plate 4 moves backward, so that the distance between the connecting block 541 and the slider 545 becomes shorter. Because the connecting rod 543 rotates the connecting shaft 542 and the rotating head 544 respectively, when the inner baffle plate 4 moves backward, the two sliders 545 will slide on the outer surface of the slide rod 52, and the distance between them will become smaller and smaller. During the sliding process, the two sliders 545 will squeeze the spring three 53 to shrink it. When the external impact force disappears, the two sliders 545 will return to their initial positions under the action of the spring three 53, and cooperate with the slide 31 and the spring one 32 to push the inner baffle plate 4 forward.

[0040] See also Figure 6 The buffer mechanism 1 2 includes two mounting plates 21. The ends of the two mounting plates 21 that are away from each other are fixedly connected to the rear end of the outer baffle plate 1 and the front end of the inner baffle plate 4 respectively. The ends of the two mounting plates 21 that are close to each other are fixedly connected to a silicone plate 1 22. The ends of the two silicone plates 1 22 that are close to each other are fixedly connected to a buffer tube 23. The ends of the two buffer tubes 23 that are close to each other are commonly fixedly connected to a silicone plate 2 24.

[0041] In this solution, the outer baffle plate 1 and the inner baffle plate 4 are connected together by two mounting plates 21. When a collision occurs, most of the impact force on the outer baffle plate 1 will be absorbed by the two silicone plates 1 22, the two buffer tubes 23 and the outer baffle plate 1 itself, and only the remaining small part will be transmitted to the inner baffle plate 4 through the silicone plate 2 24, pushing the inner baffle plate 4 to move backward.

[0042] Working principle: When the bumper is hit, the impact is relatively light, and the outer baffle plate 1, the silicone plate 1 22, the silicone plate 24 and the buffer tube 23 can buffer by themselves. When the impact is large, the outer baffle plate 1 moves backward and moves with the inner baffle plate 4. The outer baffle plate 1 squeezes the four push rods 334 inward to move it backward, so that the distance between the connecting block 541 and the slider 545 becomes shorter. Because the connecting rod 543 rotates the connecting shaft 542 and the rotating head 544 respectively, when the inner baffle plate 4 moves backward, the two sliders 545 slide on the outer surface of the slide rod 52, and the distance between them becomes smaller and smaller. During the sliding process, block 545 will squeeze spring three 53 to shrink it. At the same time, the four push rods 334 will also push the push plate 333 to squeeze spring two 335 backward to shrink it. When the inner baffle plate 4 moves to against the slide plate 31, continuing to move backward will make the slide plate 31 slide backward on the outer surface of the cylindrical shell 332, compressing spring one 32. After the collision, the external force disappears, and the two sliders 545 will return to their initial positions under the action of spring three 53, and cooperate with the slide plate 31 and spring one 32 to push the inner baffle plate 4 forward. The outer baffle plate 1 will also return to its initial position under the action of spring one 32 and spring two 335.

[0043] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A foamed EPP automobile bumper structure, comprising an outer baffle (1), characterized in that: The rear end of the outer baffle plate (1) is fixedly connected to a buffer mechanism one (2), the rear end of the buffer mechanism one (2) is fixedly connected to an inner baffle plate (4), the rear end of the inner baffle plate (4) is fixedly connected to two buffer mechanisms three (5), the rear parts of the two buffer mechanisms three (5) are commonly fixedly connected to a connecting plate (6), and the rear end of the outer baffle plate (1) is fixedly connected to four buffer mechanisms two (3).

2. The foamed EPP automobile bumper structure according to claim 1, characterized in that: The buffer mechanism 2 (3) comprises a slide plate (31), the inner surface of which is slidably connected to a buffer assembly 1 (33), and the rear end of the slide plate (31) is fixedly connected to a spring 1 (32).

3. The foamed EPP automobile bumper structure according to claim 2, characterized in that: The buffer component 1 (33) comprises a connecting piece (331), the front end of the connecting piece (331) is fixedly connected to a cylindrical shell (332), the inner cavity of the cylindrical shell (332) is slidably connected to a push plate (333), the rear end of the push plate (333) is fixedly connected to a spring 2 (335), and the front end of the push plate (333) is fixedly connected to a push rod (334).

4. The foamed EPP automobile bumper structure according to claim 3, characterized in that: The front end of the push rod (334) is fixedly connected to the rear end of the outer baffle (1), the rear end of the connecting plate (331) is fixedly connected to the front end of the connecting plate (6), and the outer surface of the cylindrical shell (332) is slidably connected to the inner surface of the sliding plate (31).

5. The foamed EPP automobile bumper structure according to claim 1, characterized in that: The buffer mechanism three (5) comprises two positioning plates (51), the rear ends of the two positioning plates (51) are fixedly connected to the front end of the connecting plate (6), the ends of the two positioning plates (51) close to each other are fixedly connected to a sliding rod (52), the outer surface of the sliding rod (52) is sleeved with a spring three (53), and the outer surface of the sliding rod (52) is slidably connected to two buffer components two (54).

6. The foamed EPP automobile bumper structure according to claim 5, characterized in that: The buffer component 2 (54) comprises a connecting block (541), wherein the upper and lower walls of the inner cavity of the connecting block (541) are rotatably connected to a rotating shaft (542), the outer surface of the rotating shaft (542) is fixedly connected to a connecting rod (543), the inner surface of the rear end of the connecting rod (543) is rotatably connected to a rotating head (544), and the rear end of the rotating head (544) is fixedly connected to a sliding block (545).

7. The foamed EPP automobile bumper structure according to claim 6, characterized in that: The ends of the two sliders (545) that are close to each other are fixedly connected to the left and right ends of the spring three (53), respectively; the inner surfaces of the two sliders (545) are slidably connected to the outer surface of the slide rod (52); and the front ends of the two connecting blocks (541) are fixedly connected to the rear end of the inner baffle (4).

8. The foamed EPP automobile bumper structure according to claim 1, characterized in that: The buffer mechanism 1 (2) comprises two mounting plates (21), the ends of the two mounting plates (21) being away from each other are fixedly connected to the rear end of the outer baffle plate (1) and the front end of the inner baffle plate (4), respectively; the ends of the two mounting plates (21) being close to each other are fixedly connected to a silicone plate 1 (22); the ends of the two silicone plates 1 (22) being close to each other are fixedly connected to a buffer tube (23); and the ends of the two buffer tubes (23) being close to each other are fixedly connected to a silicone plate 2 (24).

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