Traction device and automobile

Abstract

The invention discloses a traction device and an automobile. The traction device comprises a towing hook and a protective tube, wherein the protective tube is provided with a connecting section and aninserting section; the connecting section is connected to the towing hook, and the inserting section is in inserting fitting with an anti-collision beam; a first weakening part is formed in the inserting section; a second weakening part is formed between the first weakening part and the connecting section; the tensile strength of the first weakening part is less than that of the second weakeningpart; and the bending strength of the second weakening part is less than that generated through the first weakening part and the anti-collision beam by inserting fitting. According to the traction device, the towing hook is connected to the anti-collision beam through the protective tube; the protective tube is provided with the first weakening part and the second weakening part; when the tractionforce applied to the protective tube meets that the tension force applied to the first weakening part is beyond the maximum borne tensile strength, the first weakening part is broken; when the traction force applied to the protective tube meets that the bending torque applied to the second weakening part is beyond the maximum borne bending strength, the second weakening part is broken, and weld joints in an automobile body cannot be broken.

Description

technical field [0001] The invention relates to automobile technology, in particular to a traction device and an automobile. Background technique [0002] The tow hook is a vehicle-mounted tool. When the vehicle loses power, it needs to be installed to tow the vehicle to achieve the purpose of vehicle rescue. [0003] According to the requirements in GB32087-2015 "Light Vehicle Traction Device", the traction device applies tensile and compressive loads along the vertical direction ±5°, and the horizontal direction ±25° respectively. The minimum static load F that the automobile traction device can bear is the whole vehicle 50% of the weight, and the traction device and its fixing parts will not fail, break or deform to affect the use under the condition of greater than the minimum static load. [0004] In the prior art, the mechanical properties of the weld seam will drop by 20% to 40% when the all-aluminum body is welded, and its tensile strength is about 200MPa. When the ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the mechanical properties of the weld seam will drop by 20% to 40% when the all-aluminum body is welded, and its tensile strength is about 200MPa. When the traction device is used to drag the body, the traction force applied to the body by the existing traction device will be greater than that of the body The maximum tensile strength that the cold wind can withstand, and there is no effective measure The house traction is greater than the maximum tensile strength, so the welds of the body will crack

Images