A double-pole hinge for a back door

Abstract

The present invention discloses a back door bipolar hinge which comprises a cathode hinge, an anode hinge and a hinge mechanism box, the cathode hinge is connected with one end of the hinge mechanism box through a first-grade hinge pin, and the anode hinge is connected with the other end of the hinge mechanism box through a second-grade hinge pin. A front cam and a rear cam are respectively arranged on the first-grade hinge pin and the second-grade hinge pin, and the front cam and the rear cam are respectively connected with the cathode hinge and the anode hinge. Outer circumferences of the front cam and the rear cam are respectively provided with a cam spacing tooth, a first driving tooth for controlling the hinge to open, and a second driving tooth for controlling the hinge to close. A slide block is slidingly arranged inside the hinge mechanism box, two ends of the slide block are provided with odd-shaped orifices, the slide block is sleeved on the front cam and the rear cam through the two odd-shaped orifices, and the two odd-shaped orifices are respectively provided with a driving projecting part which is fitted with the cam spacing tooth and used for preventing a groove from being fitted with the first driving tooth and the second driving tooth. The hinge is good in wear resistance, long in service life and good in transmission, an open angle of 270 degrees can be maximally realized, and demands of more clients on the maximal open angle of a vehicle door can be satisfied.

Description

technical field [0001] The invention belongs to a car door connector, in particular to an automobile back door hinge. Background technique [0002] The back door hinge is an important part of automobile products. It is installed on the side body of the car to support and rotate the back door of the car, so that the back door can rotate around a fixed axis without falling down, so as to realize the smooth operation of the back door. Open and close function. At present, with the division of the automobile segment market, in order to meet the convenience requirements for the entry and exit of passengers or cargo, more and more commercial vehicles or commercial vehicles need to develop back doors that open at a large angle. However, the existing back door hinges generally adopt a single-stage structure (the center of rotation is an axis). Due to the limitation of the hinge structure (generally, the opening angle of a single-stage hinge cannot exceed 90 degrees), the back door c...

AI Technical Summary

Problems solved by technology

However, due to the interference fit between the slider and the cam, there is a lot of wear on the slider and the cam during the transmission process, resulting in unreliable transmission performance and affecting the service life of the product

[0003] In the prior art, the wear resistance of the transmission mechanism is usually improved by improving the material performance, but while the product reliability is improved, the cost of the product is also greatly increased.

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