Lapping component of circular tube beam and girder

Abstract

The invention discloses a lapping component of a circular tube beam and a girder. The lapping component of the circular tube beam and the girder comprises the circular tube beam, the girder, a girderexternal reinforcing plate and a girder internal sealing plate; the front end of the circular tube beam penetrates through the interior of the girder; the front end of the circular tube beam penetrates through the girder external reinforcing plate and is fixed on the external side of the girder; the girder internal sealing plate is fixed in the girder; and the bottom of the girder internal sealingplate is fixedly connected with the upper side of the circular tube beam. According to the lapping component of the circular tube beam and the girder, the structural load transmission path is effectively optimized, the cracking risk of the lapping part of the circular tube beam and the girder is effectively reduced, the connection point stress is reduced while the durability of a part is improved, the safety performance is high, the torsional rigidity of a whole vehicle is improved, and the NVH performance of the whole vehicle is improved.

Description

technical field [0001] The invention relates to a lap joint assembly of a round tube beam and a girder, in particular to a lap joint assembly of a round tube beam and a girder in a commercial vehicle body. Background technique [0002] At present, the lap joint structure between the round tube beam and the girder of the traditional commercial vehicle is relatively simple, such as figure 1 As shown, it includes a girder 1', a round tube beam 2' and a girder outer reinforcing plate 3', the round tube beam 2' passes through the inner plate of the girder 1', and the front end of the round tube beam is provided with a girder outer reinforcing plate 3' For reinforcement, but this structure has the following problems: [0003] 1. Insufficient strength at the joints of girder 1′, round tube beam 2′ and round tube beam reinforcement plate 3′: girder 1′, round tube beam 2′ and girder external reinforcement plate 3′ are connected by solder joints and secondary welding , when the stru...

AI Technical Summary

Problems solved by technology

[0003] 1. Insufficient strength at the joints of girder 1′, round tube beam 2′ and round tube beam reinforcement plate 3′: girder 1′, round tube beam 2′ and girder external reinforcement plate 3′ are connected by solder joints and secondary welding , when the structure bears the load transmitted by the chassis suspension, fuel tank and muffler, the structural strength is insufficient, and there is a risk of failure;

[0004] 2. Insufficient bending and torsional rigidity: The girder 1′ and the round tube girder 2′ are connected by secondary welding, and there is no reinforcing plate inside the girder as a support, so there is a problem of insufficient rigidity

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