Improved commercial vehicle lower protection device

Abstract

The utility model discloses an improved commercial vehicle lower protection device which comprises a transverse component, and the transverse component is connected with a vehicle frame through a support to form the improved commercial vehicle lower protection device. Wherein a semi-wrapping piece is arranged below the support and wraps three faces of the transverse component, and a bolt penetrates through the semi-wrapping piece from top to bottom to form a connection relation; wherein the opening of the semi-wrapping piece structure faces the advancing direction of the automobile. The cross section of the transverse member is of a structure shaped like a Chinese character'ri ', a reinforcing rib mode is provided for the transverse member in a middle cavity, the tensile strength of the transverse member is larger than the compressive strength due to the inherent mechanical property of materials, the first cross section thickness of a tensile stress face is reduced, the second cross section thickness of a compressive stress face is increased, and the equal-strength design target is achieved; the utilization efficiency of the material is effectively improved; a semi-wrapping piece is arranged below the support and wraps the transverse component to form a semi-surrounding structure, so that when the transverse component is impacted, external force is transmitted to an automobile frame through the support.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile protection, in particular to an improved lower protection device of commercial vehicle. BACKGROUND

[0002] According to the requirements of the national mandatory standard GB7258-2017 "Technical Conditions for Motor Vehicle Operation Safety", the total mass of more than 7.5 tons of trucks and special operation vehicles must be installed with front, side and rear protection devices. Aims to reduce the fatal injury to the driver and passengers after the car collision.

[0003] GB26511-2011 "Commercial Vehicle Front Lower Protection Requirements" stipulates the technical requirements of front lower protection device, and GB11567-2017 "Automobile and Trailer Side and Rear Lower Protection Requirements" stipulates the technical requirements of side and rear protection device.

[0004] The authorized announcement number CN 222097589 U is a kind of automobile lower protection device transverse component, the cross section of transverse component is " day " type structure provides a reinforcing rib mode in the cavity in the middle of transverse component, the mounting seat is also connected on the outer shaft diameter of transverse component by transition sleeve block, the transition of transition sleeve block is used in the connecting structure of the transverse component and frame, aims to protect transverse component, prevent in vehicle operation, with steel piece mutual friction, damage or grind fiber, shorten product life;It also provides a buffer structure for cross beam.

[0005] The application publication number CN 117207909 A is a kind of front anti-collision beam assembly and its production process, by setting buffer plate, the impact force received by front transverse component assembly can be absorbed and buffered when front transverse component assembly is impacted, to protect the driver.

[0006] The authorized announcement number CN 219584125 U is a kind of anti-collision beam assembly and vehicle, anti-collision beam assembly includes: anti-collision beam, energy-absorbing box and force transmission assembly. It can guide the collision force from the transverse component to the energy-absorbing box of longitudinal beam through the force transmission assembly in small offset collision, reduce the passenger compartment intrusion amount to improve the safety of passengers.

[0007] The above patent document provides a variety of anti-collision modes, and still needs lightweight to realize weight reduction mode. UTILITY MODEL CONTENTS

[0008] The utility model aims at solving lightweight to realize weight reduction mode, and proposes an improved lower protection device of commercial vehicle.

[0009] The utility model discloses an improved lower protection device of commercial vehicle, which comprises a horizontal component, and the cross section of the horizontal component is a "sun" type structure.

[0010] The opening of the half-wrapping piece structure faces the advancing direction of the automobile.

[0011] The cross section of the horizontal component is a "sun" type structure, which provides a reinforcing rib mode in the middle cavity of the horizontal component. Due to the inherent mechanical properties of the material, the tensile strength is greater than the compressive strength. The cross section thickness one of the tensile stress surface is thinned, and the cross section thickness two of the compressive stress surface is thickened, so as to achieve the equal strength design goal and effectively improve the utilization efficiency of the material.

[0012] The half-wrapping piece is arranged below the support to wrap the horizontal component and form a half-enclosed structure, which is used to disperse the stress concentration strength of the rear wall when the horizontal component is impacted.

[0013] Further improvement lies in that the support is a "U" type structure, and the opening direction of the "U" type structure is perpendicular to the opening direction of the half-wrapping piece structure.

[0014] The support is a "U" type structure, which can provide strong support in cooperation with the half-wrapping piece, so as to achieve the energy absorption effect and disperse the impact force after impact to the frame through the two sides of the "U" type structure.

[0015] Further improvement lies in that a plurality of through holes are arranged on the upper part of the support and on the two sides of the "U" type structure.

[0016] The "U" type structure directly clamps the frame inside and is fixed and connected by bolts through the plurality of through holes. At this time, the "U" type structure forms a three-dimensional fixed relationship in cooperation with the plurality of bolts, which plays a certain role in the lower protection of the commercial vehicle.

[0017] Further improvement lies in that the plurality of through holes are respectively a first through hole, a second through hole and a third through hole, wherein the outer side of the first through hole and the second through hole is provided with a circular gasket surface, and the third through hole and the gasket surface of the "U" type structure are matched.

[0018] The effect is that the circular gasket surface forms the first through hole and the second through hole on the outer surface to increase the strength effect; the third through hole and the gasket surface with the U-shaped structure are matched, and the gasket shape is the best reinforcing structure designed according to simulation analysis data.

[0019] Further improvement lies in that the end back surface of the bracket and the semi-wrapping piece is further provided with a reinforcing part.

[0020] The effect is that the reinforcing part provides support for the weak part of the outer end of the semi-wrapping piece, and plays a role in adjusting and balancing the beam stress.

[0021] Further improvement lies in that the transverse member is provided with a round corner part at both ends. Beneficial effects

[0022] The utility model discloses a lightweight is applicable to commercial vehicle lower protection. DRAWINGS

[0023] Figure 1 It is the assembly structure perspective view of the utility model.

[0024] Figure 2 It is the main view structure schematic diagram of the utility model.

[0025] Figure 3 It is Figure 2 The top view structure schematic diagram.

[0026] Figure 4 It is Figure 2 The bottom view.

[0027] Figure 5 It is Figure 2 The A-A section view of the utility model.

[0028] Figure 6 It is the cross section view of the transverse member 1.

[0029] 1 is the transverse member, 12 is the "day" type structure, 13 is the distal end surface, 14 is the cross section thickness one, 15 is the proximal end surface, 16 is the cross section thickness two, 17 is the upper horizontal part, 18 is the lower horizontal part, 19 is the cross section thickness three;

[0030] 2 is the bracket, 3 is the semi-wrapping piece, 4 is the bolt, 5 is the reinforcing part, 6 is the protection piece, 7 is the through hole, 71 is the first through hole, 72 is the second through hole, 73 is the third through hole, 8 is the circular gasket surface, 9 is the gasket surface. DETAILED DESCRIPTION

[0031] The utility model discloses a lightweight is applicable to commercial vehicle lower protection. Figures 1-6 As shown in the figure:

[0032] The cross member 1 is a "sun" type structure 12; the cross member 1 is a "sun" type structure 12, the cross-sectional thickness one 14 of the front end surface 13 is smaller than the cross-sectional thickness two 16 of the rear end surface 15; in the "sun" type structure 12 of the cross member 1, the cross-sectional thickness of the upper horizontal part 17 and the lower horizontal part 17 is smaller than the middle cross-sectional thickness three 29; the thickness of the cross-sectional thickness two 16 is consistent with the middle cross-sectional thickness three 19 of the "sun" type structure 12 of the cross member 1; the cross-sectional thickness of the upper horizontal part 17 and the lower horizontal part 18 is consistent with the thickness of the cross-sectional thickness one 14; the cross member 1 is connected with the frame through the bracket 2 to form an improved lower protection device of commercial vehicle; wherein the bracket 2 is provided with a half wrapping piece 3, the half wrapping piece 3 wraps the cross member 1 from three sides, and a bolt 4 is provided from top to bottom to form a connecting relationship.

[0033] The opening of the half wrapping piece 3 structure is towards the forward direction of the automobile.

[0034] The bracket 2 is a "U" type structure, and the "U" opening is perpendicular to the opening direction of the half wrapping piece structure.

[0035] The bracket 2 is provided with a plurality of through holes 7 on the upper part and both sides of the "U" type structure.

[0036] The plurality of through holes 7 are respectively a first through hole 71, a second through hole 72 and a third through hole 73, wherein the first through hole 71 and the second through hole 72 are provided with a circular gasket surface 8 outside, and the third through hole 73 and the gasket surface 9 of the "U" type structure are consistent in shape.

[0037] The bracket 2 and the end surface of the half wrapping piece 3 are further provided with a reinforcing part 5.

[0038] The cross member 1 is provided with a round corner part 6 at both ends.

Claims

1. An improved underguard for commercial vehicles, comprising a transverse member (1) having a cross-section in the shape of a "sun" (12), wherein the cross-sectional thickness one (14) of the front end face (13) is smaller than the cross-sectional thickness two (16) of the rear end face (15) in the "sun" (12) shape of the transverse member (1), and wherein the cross-sectional thicknesses of the upper (17) and lower (18) horizontal sections are smaller than the cross-sectional thickness three (19) in the "sun" (12) shape of the transverse member (1), characterized in that: The transverse member (1) is connected with the frame through the support (2) to form an improved lower protection device of a commercial vehicle; wherein the support (2) is provided with a half-wrapping piece (3) below, the half-wrapping piece (3) wraps the transverse member (1) on three sides, and a bolt (4) is provided to form a connecting relationship from top to bottom; wherein the opening of the half-wrapping piece (3) structure faces the forward direction of the vehicle.

2. The improved underguard for a commercial vehicle of claim 1, wherein: The support (2) is a "U" shaped structure, wherein the "U" shaped opening is perpendicular to the opening direction of the half-wrapping piece (3) structure.

3. The improved under-vehicle protection device according to claim 1 or 2, characterized in that: The support (2) is provided with a plurality of through holes (7) on the upper part and on both sides of the "U" shaped structure.

4. The improved underguard for a commercial vehicle of claim 3, wherein: The plurality of through holes (7) are respectively a first through hole (71), a second through hole (72) and a third through hole (73), wherein the first through hole (71) and the second through hole (72) are provided with a circular gasket surface (8) on the outer side, and the third through hole (73) is matched with the gasket surface (9) of the "U" shaped structure.

5. The improved underguard for a commercial vehicle of claim 1, wherein: The end back of the support (2) and the half-wrapping piece (3) is further provided with a reinforcing part (5).

6. The improved underguard for a commercial vehicle of claim 1, wherein: The transverse member (1) is provided with a round corner part (6) at both ends.

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