EDJ long shaft

Abstract

The utility model relates to the technical field of long shafts, in particular to an EDJ long shaft. According to the technical scheme, the cup comprises a cup part, a main body rod and a rod head, the main body rod is arranged at one end of the cup part, the rod head is arranged at the end, away from the cup part, of the main body rod, and round holes are formed in the central axis positions of the cup part, the main body rod and the rod head. According to the long shaft for the EDJ, the use strength of the long shaft for the EDJ is maintained and the steel consumption of the long shaft for the EDJ is reduced through the matching of the structures, so that the driving shaft has the characteristics of low cost and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of long shafts, and particularly relates to an EDJ long shaft. Background Technique

[0002] A universal joint, namely a universal coupling, is a mechanical part that realizes power transmission at variable angles and is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" part of the universal transmission device of an automobile drive system, and the EDJ assembly is a double-offset universal joint assembly.

[0003] For existing automotive rear drive shafts, due to the relatively large starting torque of electric vehicles and high NVH performance requirements, the EPT low-vibration joint type is selected. However, the manufacturing cost of the long shaft of the EPT low-vibration joint type is relatively high.

[0004] Therefore, we propose an EDJ long shaft to solve the existing problems. Content of the Utility Model

[0005] The purpose of the utility model is to propose an EDJ long shaft for the problems existing in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an EDJ long shaft, including a cup part, a main body rod and a rod head. One end of the cup part is provided with the main body rod, and the end of the main body rod away from the cup part is provided with the rod head. Round holes are opened at the central axis positions of the cup part, the main body rod and the rod head.

[0007] Preferably, a ring groove is opened at the inner wall position of the cup mouth of the cup part.

[0008] Preferably, each positioning groove is provided on the inner wall of the cup part, and the positioning grooves are distributed in a circular array on the inner wall of the cup part, and the positioning grooves communicate with the ring groove.

[0009] Preferably, splines are provided on the outer surface of the main body rod, and the positions of the splines are symmetrically distributed with respect to the main body rod.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] During the use of the EDJ long shaft of the utility model, the induced resistance is small, and under high-angle vibration conditions, the NVH performance is good. When applied to the rear axle of a new energy electric vehicle, it can avoid idle vibration and achieve good NVH performance;

[0012] Furthermore, when the long shaft structure of the EDJ works, it only bears torque. According to the relevant theories of mechanics of materials, when a circular rod with a constant cross-section is subjected to torque, the shear stress on its cross-section is distributed linearly along the radius, and the stress near the center of the circle is very small;

[0013] According to the above principle, a round hole is provided at the axial center position of the long axis for the EDJ. In the present utility model, while maintaining the use strength of the long axis for the EDJ, the steel consumption of the long axis for the EDJ is reduced, so that the drive shaft has the characteristics of low cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 3 is a cross-sectional structural schematic diagram of the present utility model;

[0017] Figure 4 is of the present utility model Figure 3 planar structural schematic diagram.

[0018] Reference numerals:

[0019] 1, cup part; 2, main body rod; 3, rod head; 4, round hole; 5, spline; 6, positioning groove; 7, annular groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] Embodiment 1

[0022] As Figures 1-4 shown, an EDJ long shaft proposed by the present utility model includes a cup part 1, a main body rod 2 and a rod head 3. One end of the cup part 1 is provided with the main body rod 2, and the end of the main body rod 2 away from the cup part 1 is provided with the rod head 3. Round holes 4 are provided at the central axis positions of the cup part 1, the main body rod 2 and the rod head 3.

[0023] Based on Embodiment 1:

[0024] During the use of the EDJ long shaft of the present utility model, the induced resistance is small, and under high-angle vibration conditions, the NVH performance is good. When applied to the rear axle of a new energy electric vehicle, the idle vibration can be avoided, and good NVH performance can be achieved;

[0025] Furthermore, when the EDJ operates with the long-axis structure, it only bears torque. According to the relevant theories of mechanics of materials, when a circular rod with a constant cross-section is subjected to torque, the shear stress on its cross-section is distributed linearly along the radius, and the stress near the center of the circle is very small.

[0026] According to the above principle, a circular hole 4 is provided at the axial center position of the long axis of the EDJ.

[0027] Embodiment 2

[0028] As Figures 1-4 shown, an EDJ long axis proposed by the present utility model, compared with Embodiment 1, this embodiment further includes: a ring groove 7 is provided at the inner wall position of the cup mouth of the cup portion 1, and each positioning groove 6 is provided on the inner wall of the cup portion 1. The positioning grooves 6 are arranged in a circular array on the inner wall of the cup portion 1. The positioning groove 6 is communicated with the ring groove 7. When the long-axis structure of the EDJ is connected to an external structure, the external connector is snapped into the ring groove 7, and the slider on the connector is in sliding contact with the positioning groove 6, so as to facilitate the installation operation of the EDJ long axis.

[0029] The outer surface of the main body rod 2 is provided with splines 5, and the positions of the splines 5 are symmetrically distributed with respect to the main body rod 2. Through the design of the splines 5, the surface friction of the main body rod 2 can be increased.

[0030] The above specific embodiments are only several preferred embodiments of the present utility model. Based on the technical solution of the present utility model and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An EDJ long shaft, comprising a cup portion (1), a main rod (2) and a rod head (3), characterized in that: A main body rod (2) is provided at one end of the cup portion (1), a rod head (3) is provided at the end of the main body rod (2) away from the cup portion (1), and a circular hole (4) is provided at the center axis of the cup portion (1), the main body rod (2) and the rod head (3).

2. The EDJ long axis according to claim 1, characterized in that: An annular groove (7) is provided at the inner wall of the cup opening of the cup portion (1).

3. The EDJ long axis according to claim 1, characterized in that: The inner wall of the cup portion (1) is provided with positioning grooves (6), and the positioning grooves (6) are distributed in a ring array on the inner wall of the cup portion (1), and the positioning grooves (6) are interconnected with the annular groove (7).

4. The EDJ long axis according to claim 1, characterized in that: The outer surface of the main body rod (2) is provided with splines (5), and the positions of the splines (5) are symmetrically distributed relative to the main body rod (2).

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