High-strength connecting rod structure for new energy vehicle

Abstract

The utility model relates to the technical field of connecting rods, in particular to a high-strength connecting rod structure for a new energy vehicle, which comprises a rod body as well as a large head and a small head which are respectively connected with two ends of the rod body, and the large head comprises a large head section A and a large head section B which can be separated or contacted; the rod body comprises a straight vertical rib and a curved vertical rib, the straight vertical rib and the curved vertical rib are connected through a transverse plate, a protruding honeycomb rib is arranged on the surface of the transverse plate, the contact faces of the large-head section A and the large-head section B are two sets of opposite expansion fracture surfaces, the large-head section A and the large-head section B are each provided with a hole for a connecting bolt to penetrate through, and the large-head section B is fixedly connected with the rod body. The straight vertical ribs, the curved vertical ribs, the transverse plates and the honeycomb ribs are combined, so that the bending resistance and the torsion resistance of the connecting rod are effectively enhanced, the weight is reduced while high strength is guaranteed, and the transmission efficiency and the durability of an engine are improved; the two sections of the large head are connected through the expansion fracture surface, so that stress distribution is more uniform when the connecting rod bears alternating loads brought by engine operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to connecting rod technical field especially a new energy vehicle high strength connecting rod structure. BACKGROUND

[0002] With the increasing attention of global environmental protection and energy conservation and emission reduction, new energy vehicles (such as electric vehicles, hybrid vehicles, etc.) have been rapidly developed and widely applied, and with the rapid development of new energy vehicles, the performance requirements of vehicle parts are also higher and higher. Compared with traditional fuel vehicles, the power system of new energy vehicles has some differences, and the transmission parts need to withstand more complex and variable working conditions, including high torque output, frequent start and stop and long-term stable operation. As an important part of the automobile transmission system, the connecting rod bears complex alternating load, and its strength and reliability directly affect the overall performance and safety of the automobile. Therefore, upgrading technology to improve the strength of the connecting rod structure of new energy vehicles has important practical significance. SUMMARY

[0003] The utility model aims at providing a new energy vehicle high strength connecting rod structure adopts specific structure design, aims at improving the connection strength and stability.

[0004] To solve the above technical problems, the utility model adopts the technical scheme as follows:

[0005] A new energy vehicle high strength connecting rod structure, including the stem and the big head and the small head of the stem two ends are connected respectively, the big head includes the big head A section and the big head B section of separable or contact, the stem includes the vertical rib of straight state and the vertical rib of curved state, the vertical rib of straight state and the vertical rib of curved state are connected through the transverse plate, and the transverse plate surface is provided with the convex honeycomb rib.

[0006] Further, the contact surface of the big head A section and the big head B section is two groups of opposite expansion sections, the big head A section and the big head B section are provided with the hole for the connecting bolt to pass through, and the big head B section is inseparable with the stem.

[0007] Further, the honeycomb rib is located in the space surrounded by the big head B section, the small head, the vertical rib of straight state and the vertical rib of curved state, and the honeycomb rib is provided on the opposite two surfaces of the transverse plate.

[0008] Further, the vertical rib of straight state and the vertical rib of curved state are both connected with the transverse plate vertically.

[0009] Further, the small head is provided with a small head bushing, the periphery of the small head bushing is provided with two annular grooves, a stop collar is clamped and embedded in the annular groove, and the two stop collars clamp the small head in the middle.

[0010] Further, the cylindrical inner wall of the small head bushing is provided with a copper lining layer with a thickness of greater than or equal to 2 mm.

[0011] Further, the height and thickness of the straight vertical rib and the curved vertical rib are equal.

[0012] The beneficial effects of the technical scheme of the utility model are as follows:

[0013] The high-strength connecting rod structure for a new energy vehicle can effectively enhance the bending resistance and torsion resistance of the connecting rod, realizes the reduction of weight while ensuring high strength, improves the transmission efficiency and durability of the engine, the two sections of the big head are connected by an expanded section, so that the stress distribution of the connecting rod is more uniform when the connecting rod bears the alternating load caused by the operation of the engine, the plane of the straight vertical rib allows the connecting rod to be vertically placed during transportation, reducing the space occupation, and the curved vertical rib has a larger empty space on one side, which is beneficial to the improved design of the engine. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0016] Figure 2 It is Figure 1 It is a sectional view along A-A direction in the embodiment;

[0017] Figure 3 It is an exploded structure schematic view of the utility model;

[0018] Figure 4 It is Figure 3 It is an enlarged schematic view of B in the embodiment;

[0019] Figure 5 It is Figure 3 It is an enlarged schematic view of C in the embodiment;

[0020] In the drawing: 1: rod body; 1a: straight vertical rib; 1b: curved vertical rib; 1c: horizontal plate; 1d: honeycomb rib; 2: big head; 2a: big head A section; 2b: big head B section; 3: small head; 4: small head bushing; 4a: annular groove; 4b: copper lining layer; 5: stop check ring; 6: connecting bolt. DETAILED DESCRIPTION

[0021] The utility model will be further explained in detail below in combination with the drawings. The drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the structure related to the utility model and should not limit the scope of protection of the utility model.

[0022] Please refer to Figures 1-5 A new energy vehicle high-strength connecting rod structure, including the stem 1 and the stem 1 both ends are connected with the big head 2 and the small head 3, the stem 1 both ends connecting part adopts the high-strength joint formed by precision forging technology, ensure the close cooperation with bearing or transmission shaft, reduce wear and looseness, the big head 2 includes the big head A section 2a and the big head B section 2b that can be separated or contact, the stem 1 includes straight state vertical rib 1a and curved state vertical rib 1b, straight state vertical rib 1a and curved state vertical rib 1b are connected through the transverse plate 1c, the transverse plate 1c surface is provided with the convex honeycomb rib 1d, the height, thickness of straight state vertical rib 1a and curved state vertical rib 1b are equal, both are connected with the transverse plate 1c vertically, the honeycomb rib 1d is located in the space surrounded by the big head B section 2b, small head 3, straight state vertical rib 1a and curved state vertical rib 1b, the honeycomb rib 1d is provided on the opposite sides of the transverse plate 1c, through the combination of straight state vertical rib 1a, curved state vertical rib 1b, transverse plate 1c and honeycomb rib 1d, the cross section of stem 1 is designed as variable cross section shape, according to stress analysis, increase the wall thickness in the area of bearing maximum stress, and thin in the area of smaller stress, so that it can greatly reduce the overall weight of connecting rod while ensuring sufficient strength, the distribution design of honeycomb shape can effectively enhance the bending and torsional resistance of connecting rod, realize the weight reduction while ensuring high strength, improve the transmission efficiency and durability of engine.

[0023] Specifically, the contact surface of big head A section 2a and big head B section 2b is two groups of opposite expansion fracture surfaces, since the expansion fracture process is brittle fracture of material, the internal metal grain structure of connecting rod big head is not cut off and damaged like traditional processing after fracture, but relatively complete continuity is retained, so that the stress distribution of connecting rod is more uniform when bearing the alternating load brought by engine operation. Compared with traditional connecting rod, the expansion fracture connecting rod can bear greater tensile, compression, bending and torsional force, significantly improving the fatigue life of connecting rod, and providing solid guarantee for long-time reliable operation of engine.

[0024] Further optimization scheme, the small head 3 is provided with a small head bushing 4, the periphery of the small head bushing 4 is provided with two annular grooves 4a, the annular groove 4a is clamped and embedded with a stop ring 5, and the two stop rings 5 sandwich the small head 3;The cylindrical inner periphery of the small head bushing 4 is provided with a copper lining layer 4b with a thickness of ≥2mm, and copper has good self-lubricating performance.In the friction process, the copper atom layers and the copper and the surface of the counter material will interact, and the crystal structure makes some copper atoms have a certain probability to separate from the parent body, forming an extremely thin layer of lubricant-like film on the friction interface.This layer of film can significantly reduce the friction coefficient, reduce direct dry friction between surfaces, and make the object more smooth when sliding.

[0025] In the technical solution, the plane of the straight-state vertical rib 1a allows the connecting rod to be vertically placed during transportation, reducing space occupation, and the curved-state vertical rib 1b has a larger empty space on one side, which is beneficial for the improved design of the engine.In addition, the surface of the connecting rod is treated by anodic oxidation to form a dense oxide film, which not only improves the wear resistance and corrosion resistance of the connecting rod, but also further enhances the surface hardness of the connecting rod, thereby improving the overall service life of the connecting rod.

[0026] The present scheme relates to a high-strength connecting rod structure for new energy vehicles, which significantly improves the mechanical properties and durability of the connecting rod, and is suitable for various new energy vehicle drive systems and other related applications.In the engine assembly link, the prepared connecting rod is connected with the piston pin and the crankshaft according to the standard process.When the engine is running, the high-strength connecting rod, with its excellent material properties, reasonable structure design and reliable surface protection, can stably withstand alternating loads, efficiently transmit power and ensure reliable long-term operation of the engine, reducing the maintenance frequency caused by connecting rod failure.

[0027] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto.It should be noted that for ordinary skilled persons in the art, changes, modifications or additions can be made without departing from the concept of the present application, and all should be covered within the protection scope of the present application.

Claims

1. A high-strength connecting rod structure for a new energy vehicle, characterized by: The utility model relates to a golf club, which comprises a shaft (1), a big head (2) and a small head (3) connected to both ends of the shaft (1), the big head (2) comprises a big head A section (2a) and a big head B section (2b) which can be separated or contacted, the shaft (1) comprises a straight vertical rib (1a) and a curved vertical rib (1b), the straight vertical rib (1a) and the curved vertical rib (1b) are connected by a horizontal plate (1c), and the horizontal plate (1c) is provided with a convex honeycomb rib (1d) on the surface.

2. The high-strength connecting rod structure for a new energy vehicle according to claim 1, characterized in that: The contact surface of the big head A section (2a) and the big head B section (2b) is two groups of opposite expansion fracture surfaces, the big head A section (2a) and the big head B section (2b) are provided with holes for connecting bolts (6) to pass through, and the big head B section (2b) is fixedly connected with the shaft (1) in a non-separable manner.

3. The high-strength connecting rod structure for a new energy vehicle according to claim 2, characterized in that: The honeycomb rib (1d) is located in the space surrounded by the big head B section (2b), the small head (3), the straight vertical rib (1a) and the curved vertical rib (1b), and the honeycomb rib (1d) is arranged on the opposite surfaces of the horizontal plate (1c).

4. The high-strength connecting rod structure for a new energy vehicle according to claim 3, characterized in that: The straight vertical rib (1a) and the curved vertical rib (1b) are vertically connected with the horizontal plate (1c).

5. The high-strength connecting rod structure for a new energy vehicle according to claim 1, characterized in that: The small head (3) is provided with a small head bushing (4), the periphery of the small head bushing (4) is provided with two annular grooves (4a), the annular grooves (4a) are clamped and embedded with stop check rings (5), and the two stop check rings (5) clamp the small head (3) in the middle.

6. The high-strength connecting rod structure for a new energy vehicle according to claim 5, characterized in that: The cylindrical inner periphery of the small head bushing (4) is provided with a copper lining layer (4b) with a thickness greater than or equal to 2 mm.

7. The high-strength connecting rod structure for a new energy vehicle according to claim 4, characterized in that: The height and thickness of the straight vertical rib (1a) and the curved vertical rib (1b) are equal.

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