Buffer protection device for in-field semitrailer

Abstract

The utility model relates to the field of in-field semitrailer protection devices, and discloses a buffer protection device for an in-field semitrailer, which comprises a chassis, wheels are arranged at the bottom end of the chassis, a box body is fixedly connected above the chassis, a box door is hinged to the right side of the box body, a protection plate is hinged to the bottom end of the right side of the chassis, and the protection plate is fixedly connected with the chassis. A supporting rod is hinged to the left side of the protection plate, a sliding block is hinged to the left end of the supporting rod, a buffering unit is arranged on the outer side of the sliding block, the buffering unit comprises a sliding groove, and a limiting unit is arranged in the buffering unit. According to the vehicle protection device, through cooperation of the supporting rods, the sliding blocks and the buffering units, when the rear end of the vehicle is impacted and the vehicle body cannot be damaged, the protection plate can be turned over, the impact force borne by the protection plate is buffered and protected, and the situation that the original protection effect of the protection plate is affected due to the fact that the protection plate is damaged when the protection plate is impacted slightly is avoided.

Description

Technical Field

[0001] The utility model relates to the field of on-site semi-trailer protection devices, in particular to a buffer protection device for on-site semi-trailers. Background Technique

[0002] Due to the uneven road surface caused by the settlement of the port area road and the frequent impact of container loading and unloading during the operation of large lifting machinery, the damage frequency of key components such as leaf springs and buffer support balance beams of the semi-trailer is increasing. This leads to an increased risk of container overturning, rear-ending during semi-trailer operation, and rubbing against passing vehicles due to the sudden tilt of the semi-trailer. There are serious safety hazards. Therefore, a buffer protection device is provided on the outside of the semi-trailer to protect the semi-trailer.

[0003] After retrieval, the Chinese patent publication number: CN220096313U discloses a side buffer anti-collision plate for a semi-trailer, including a designed buffer structure. Support frames are installed at both ends on one side of the door. A buffer plate is slidably installed inside the support frames, and a buffer device is installed between the buffer plate and the support frames. When the buffer plate is impacted, the probability of damage to the door is reduced.

[0004] In the actual use process of the above-mentioned side buffer anti-collision plate, the buffer plate structure used not only needs to protect the box door, but also needs to prevent pedestrians and other small vehicles from drilling under the semi-trailer. Therefore, the integrity of the buffer plate needs to be guaranteed to a certain extent, otherwise it will affect the protection effect it is supposed to achieve. In addition, the rear end of the semi-trailer will be impacted by some trolleys or flatbed trucks used for transporting goods during daily use. These impacts will not affect the vehicle body, but will cause the buffer plate to deform and affect the protection performance of the buffer plate. For this reason, a buffer protection device for on-site semi-trailers is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a buffer protection device for on-site semi-trailers, aiming to improve the problem that when the rear end of the on-site semi-trailer is impacted by a small vehicle without affecting the vehicle body, the buffer plate used for buffer protection will deform and affect its protection effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: A buffer protection device for on-site semi-trailers includes a chassis. Wheels are arranged at the bottom end of the chassis. A box body is fixedly connected above the chassis. A box door is hinged to the right side of the box body. A protection plate is hinged to the bottom right end of the chassis. A support rod is hinged to the left side of the protection plate. A slider is hinged to the left end of the support rod. A buffer unit is arranged outside the slider, and a limiting unit is arranged inside the buffer unit.

[0007] As a further description of the above technical solution:

[0008] A telescopic rod is fixedly connected to the right side surface of the protective plate. A spring is sleeved outside the telescopic rod. The right end of the telescopic rod is fixedly connected to a mounting plate. A buffer plate is fixedly connected to the right side surface of the mounting plate. A limiting block is fixedly connected to the right side surface of the protective plate.

[0009] As a further description of the above technical solution:

[0010] The buffer unit includes a chute. The chute is opened on the bottom surface of the chassis. An elastic member is fixedly connected to the left inner wall surface of the chute. The right end of the elastic member is fixedly connected to the left side surface of the slider. The slider is slidably connected inside the chute.

[0011] As a further description of the above technical solution:

[0012] The limiting unit includes a discharge groove. The discharge groove is opened on one side surface of the chute near the center of the chassis. A through groove is opened on the front side surface of the slider. A screw hole is opened on the side surface of the chute away from the center of the chassis. A screw is threadedly connected inside the screw hole. A cross groove is opened on the side surface of the screw away from the slider. A limiting rod is fixedly connected to the side surface of the screw near the slider.

[0013] As a further description of the above technical solution:

[0014] The bottom end of the discharge groove penetrates through the chassis. The end of the screw hole away from the chute penetrates through the chassis.

[0015] As a further description of the above technical solution:

[0016] The end of the limiting rod away from the screw is inserted into the through groove.

[0017] As a further description of the above technical solution:

[0018] The left end of the spring is fixedly connected to the right side surface of the protective plate. The right end of the spring is fixedly connected to the left side surface of the mounting plate.

[0019] As a further description of the above technical solution:

[0020] The limiting block is located directly to the left of the buffer plate.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present utility model, through the cooperation of the provided support rod, slider and buffer unit, when the impact received at the rear end of the vehicle does not cause damage to the vehicle body, the protective plate can be folded up, and the impact force received by the protective plate can be buffered and protected, avoiding damage to the protective plate when it receives a small impact and affecting its original protective effect. Through the provided limiting unit, the movement of the slider can be limited, avoiding the buffer unit from intervening in protection when the vehicle has a slight shake, and the service life of the buffer unit can be extended.

[0023] 2. In the present utility model, through the cooperation of the provided telescopic rod, spring, mounting plate and buffer plate, the small impact force received by the protective plate can be buffered and protected, further reducing the situation that the protective plate is damaged when it receives a small impact and affecting its use. And through the provided limiting block, the movement of the mounting plate is limited, avoiding the mounting plate from moving excessively to the left and exceeding the spring compression limit, affecting the subsequent buffer protection effect on the protective plate. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the whole of a buffer protection device for an in-yard semi-trailer proposed by the present utility model;

[0025] Figure 2 It is a schematic diagram of the bottom surface of the chassis of a buffer protection device for an in-yard semi-trailer proposed by the present utility model;

[0026] Figure 3 It is a schematic diagram of part A of a buffer protection device for an in-yard semi-trailer proposed by the present utility model Figure 2 ;

[0027] Figure 4 It is a schematic diagram of a partially sectional view of the right side of the chassis of a buffer protection device for an in-yard semi-trailer proposed by the present utility model;

[0028] Figure 5 It is a schematic diagram of part B of a buffer protection device for an in-yard semi-trailer proposed by the present utility model Figure 4 ;

[0029] Figure 6 It is a schematic diagram of the telescopic rod, spring, mounting plate and buffer plate of a buffer protection device for an in-yard semi-trailer proposed by the present utility model;

[0030] Figure 7 It is a schematic diagram of part C of a buffer protection device for an in-yard semi-trailer proposed by the present utility model Figure 1 ;

[0031] Legend Explanation:

[0032] 1. Chassis; 2. Wheels; 3. Box body; 4. Box door; 5. Protection plate; 6. Support rod; 7. Slide block; 81. Slide groove; 82. Elastic member; 91. Discharge groove; 92. Through groove; 93. Screw hole; 94. Screw; 95. Cross groove; 96. Limit rod; 10. Telescopic rod; 11. Spring; 12. Mounting plate; 13. Buffer plate; 14. Limit block. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Refer to Figure 1 - Figure 2 , an embodiment provided by the present invention: a buffer protection device for an in-yard semi-trailer, including a chassis 1, wheels 2 are arranged at the bottom end of the chassis 1, a box body 3 is fixedly connected above the chassis 1, the box body 3 and the chassis 1 are detachably connected, and a box door 4 is hinged to the right side of the box body 3.

[0035] Refer to Figure 3 - Figure 5 , a protection plate 5 is hinged to the right bottom end of the chassis 1, a support rod 6 is hinged to the left side of the protection plate 5, a slide block 7 is hinged to the left end of the support rod 6, when the slide block 7 moves to the left, the protection plate 5 can be pulled to the left through the support rod 6, so that the protection plate 5 rotates to the left. A buffer unit is arranged outside the slide block 7. The buffer unit includes a slide groove 81, the slide groove 81 is opened on the bottom surface of the chassis 1, an elastic member 82 is fixedly connected to the left inner wall surface of the slide groove 81, and the right end of the elastic member 82 is fixedly connected to the left surface of the slide block 7. When the slide block 7 moves to the left, the elastic member 82 can be extruded, so that the elastic member 82 compresses to generate elastic potential energy. The slide block 7 is slidably connected inside the slide groove 81, and the slide groove 81 can guide and limit the movement of the slide block 7, so that the slide block 7 maintains a linear movement in the left-right direction. When the rear end of the semi-trailer is impacted, the protection plate 5 will be extruded. At this time, the protection plate 5 will oppress the elastic member 82 through the support rod 6 and the slide block 7, and the elastic potential energy of the elastic member 82 is used to buffer and offset the impact force received by the semi-trailer, and prevent the protection plate 5 from directly bearing the impact force and being easily damaged.

[0036] The interior of the buffer unit is provided with a limiting unit. The limiting unit includes a discharge groove 91. The discharge groove 91 is opened on the side surface of the inner part of the sliding groove 81 close to the center of the chassis 1. The bottom end of the discharge groove 91 penetrates through the chassis 1. A through groove 92 is opened on the front side surface of the slider 7. The through groove 92 is communicated with the interior of the discharge groove 91. A screw hole 93 is opened on the side surface of the sliding groove 81 away from the center of the chassis 1. One end of the screw hole 93 away from the sliding groove 81 penetrates through the chassis 1. A screw rod 94 is threadedly connected inside the screw hole 93. When the screw rod 94 rotates, it can perform linear motion in the front and rear directions inside the screw hole 93. A cross groove 95 is opened on the side surface of the screw rod 94 away from the slider 7. The staff can use a screwdriver to cooperate with the cross groove 95 to turn the screw rod 94. A limiting rod 96 is fixedly connected to the side surface of the screw rod 94 close to the slider 7. When the screw rod 94 moves, it can drive the limiting rod 96 to move synchronously. One end of the limiting rod 96 away from the screw rod 94 is inserted into the interior of the through groove 92. The limiting rod 96 can be made of wood or resin materials and can be broken when subjected to a large impact force.

[0037] In the initial state, the limiting rod 96 is inserted into the interior of the through groove 92 and can limit the slider 7. When the impact force received by the rear end of the semi-trailer is small, the movement of the slider 7 will be blocked by the limiting rod 96, avoiding the elastic member 82 being squeezed when the vehicle is slightly swayed or impacted within the tolerable range of the protective plate 5, resulting in affecting the service life of the buffer unit. When the impact force received by the rear of the vehicle is large, the slider 7 can break the limiting rod 96, enabling the elastic member 82 to play a role in buffering. After the collision, the staff can use a screwdriver to rotate the screw rod 94 to drive the limiting rod 96 to move into the interior of the through groove 92 to restore the limitation of the slider 7, and push the broken part out of the interior of the through groove 92, so that the broken part is discharged through the discharge groove 91.

[0038] Refer to Figure 6 - Figure 7 , a telescopic rod 10 is fixedly connected to the right side surface of the protective plate 5. A spring 11 is sleeved outside the telescopic rod 10. The left end of the spring 11 is fixedly connected to the right side surface of the protective plate 5. The right end of the spring 11 is fixedly connected to the left side surface of the mounting plate 12. The right end of the telescopic rod 10 is fixedly connected to the mounting plate 12. When the mounting plate 12 is subjected to an impact force, it will squeeze the telescopic rod 10 and the spring 11. The impact force is buffered by the elastic potential energy of the spring 11, which can further protect the protective plate 5. A buffer plate 13 is fixedly connected to the right side surface of the mounting plate 12. A limiting block 14 is fixedly connected to the right side surface of the protective plate 5. The limiting block 14 is located directly to the left of the buffer plate 13. The buffer plate 13 is made of rubber material and can further buffer and protect the impact force received by the protective plate 5. The limiting block 14 can limit the moving distance of the mounting plate 12, avoiding the mounting plate 12 moving excessively to the left resulting in exceeding the compression limit of the spring 11, causing damage to the spring 11 and affecting the buffer protection effect on the protective plate 5.

[0039] Working principle: When the rear end of the semi-trailer is impacted but the vehicle is not impacted, the installed mounting plate 12, buffer plate 13, spring 11 and telescopic rod 10 can perform preliminary buffering on the impact force to buffer and protect the protection plate 5. At the same time, the set limiting unit can limit the protection plate 5 to avoid the buffering unit intervening in buffering when the impact force is within the tolerable range of the protection plate 5, which can improve the service life of the buffering unit. When the impact force on the protection plate 5 is relatively large, the slider 7 can break the limiting rod 96, so that the buffering unit intervenes for further buffering protection, and the protection plate 5 rotates to the left, avoiding damage to the protection plate 5 when the rear end of the vehicle is impacted but the force application point is relatively low and does not cause damage to the vehicle body, and then resulting in the protection plate 5 being unable to protect pedestrians and other vehicles from drilling under the semi-trailer.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A buffer protection device for a semi-trailer in a field, comprising a chassis (1), characterized in that: A wheel (2) is provided at the bottom end of the chassis (1), a box body (3) is fixedly connected to the top of the chassis (1), a box door (4) is hingedly connected to the right side of the box body (3), a protective plate (5) is hingedly connected to the bottom end of the right side of the chassis (1), a support rod (6) is hingedly connected to the left side of the protective plate (5), a slider (7) is hingedly connected to the left end of the support rod (6), a buffer unit is provided on the outside of the slider (7), and a limit unit is provided inside the buffer unit.

2. The buffer protection device for a semi-trailer in a field according to claim 1 is characterized in that: A telescopic rod (10) is fixedly connected to the right side surface of the protective plate (5), a spring (11) is sleeved on the outer side of the telescopic rod (10), a mounting plate (12) is fixedly connected to the right end of the telescopic rod (10), a buffer plate (13) is fixedly connected to the right side surface of the mounting plate (12), and a limiting block (14) is fixedly connected to the right side surface of the protective plate (5).

3. The buffer protection device for a semi-trailer in a field according to claim 1, characterized in that: The buffer unit comprises a slide groove (81), wherein the slide groove (81) is provided on the bottom surface of the chassis (1), an elastic member (82) is fixedly connected to the left inner wall surface of the slide groove (81), a right end of the elastic member (82) is fixedly connected to the left surface of the slider (7), and the slider (7) is slidably connected to the inside of the slide groove (81).

4. The buffer protection device for a semi-trailer in a field according to claim 1, characterized in that: The limiting unit comprises a discharge groove (91), the discharge groove (91) being provided on a side surface of the inner part of the slide groove (81) close to the center of the chassis (1), a through groove (92) being provided on the front side surface of the slide block (7), a screw hole (93) being provided on a side surface of the slide groove (81) away from the center of the chassis (1), a screw rod (94) being connected to the inner thread of the screw hole (93), a cross groove (95) being provided on a side surface of the screw rod (94) away from the slide block (7), and a limiting rod (96) being fixedly connected to a side surface of the screw rod (94) close to the slide block (7).

5. The buffer protection device for a semi-trailer in a field according to claim 4 is characterized in that: The bottom end of the discharge groove (91) passes through the bottom plate (1), and the end of the screw hole (93) away from the slide groove (81) passes through the bottom plate (1).

6. The buffer protection device for a semi-trailer in a field according to claim 4, characterized in that: One end of the limiting rod (96) away from the screw rod (94) is plugged into the interior of the through slot (92).

7. The buffer protection device for a semi-trailer in a field according to claim 2, characterized in that: The left end of the spring (11) is fixedly connected to the right side surface of the protective plate (5), and the right end of the spring (11) is fixedly connected to the left side surface of the mounting plate (12).

8. The buffer protection device for a semi-trailer in a field according to claim 2, characterized in that: The limit block (14) is located directly to the left of the buffer plate (13).

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