Connecting rod assembly and vehicle

Abstract

The utility model discloses a connecting rod assembly and a vehicle. The connecting rod assembly comprises a connecting rod and a connecting rod bearing, the connecting rod is expanded and broken into a rod body and a head cover at the first head hole, an expansion section is formed, and a first groove body and a second groove body which are spaced in the axial direction are formed in the first head hole of the connecting rod; the connecting rod tile is matched with the first head hole and comprises two tiles which are spliced, each tile is provided with a positioning lip, the positioning lip of each tile is provided with a lip face facing the other tile, the positioning lip of one tile is located in the first groove body, and the positioning lip of the other tile is located in the second groove body; when the lip surface is lower than the splicing surface of the two tiles, the first groove body is arranged on the rod body and the second groove body is arranged on the head cover, or when the lip surface is flush with the splicing surface of the two tiles, one of the first groove body and the second groove body extends to the head cover along the rod body, and the other groove body is arranged on the rod body or the head cover. According to the connecting rod assembly, the circumferential rotation risk of the connecting rod bearing in the working process of an engine is reduced, and the reliability of the engine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a connecting rod assembly and a vehicle. Background Art

[0002] At present, split fracture connecting rods are commonly used in internal combustion engine connecting rods. That is, the big end cap and the connecting rod body of the connecting rod adopt a cracking process. Stress grooves are designed and prefabricated at the central parting surface of the big end to form stress concentration. Then, a load perpendicular to the predetermined fracture surface is applied by hydraulic or mechanical means, so that the big end cap of the connecting rod fractures along the designed end surface with almost no plastic deformation. The formed parting surface is an uneven fracture stubble, with more accurate positioning, better roundness recovery of the big end hole of the connecting rod, and better anti-shearing ability.

[0003] For the assembly of the engine connecting rod bearing and the connecting rod, the currently commonly used solution is that there is a bearing positioning groove designed in the big end hole of the connecting rod. However, when assembling the connecting rod bearing in the engine, the connecting rod bearing may be circumferentially misaligned, and during the operation of the engine, the connecting rod bearing may also rotate circumferentially, thus causing the risk of bearing failure. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a connecting rod assembly, which reduces the circumferential rotation risk of the connecting rod bearing during the operation of the engine and improves the reliability of the engine.

[0005] The connecting rod assembly according to an embodiment of the utility model includes: a connecting rod and a connecting rod bearing; the connecting rod is provided with a first head hole, the connecting rod is split into a rod body and a head cap at the first head hole, and a split surface is formed at the split position. The connecting rod is provided with a first groove body and a second groove body that are axially spaced apart and circumferentially extend respectively at the first head hole; the connecting rod bearing is cooperatively arranged in the first head hole. The connecting rod bearing includes two relatively spliced bearing shells, and each bearing shell is provided with a positioning lip near the splicing position. Each positioning lip of each bearing shell has a lip surface facing the other bearing shell. The positioning lip of one bearing shell is located in the first groove body and the positioning lip of the other bearing shell is located in the second groove body; wherein, when the lip surface is lower than the splicing surface of the two bearing shells, the first groove body is arranged on the rod body and the second groove body is arranged on the head cap and both open towards the split surface, or when the lip surface is flush with the splicing surface of the two bearing shells, one of the first groove body and the second groove body extends along the rod body to the head cap, and the other is arranged on the rod body or the head cap.

[0006] According to the connecting rod assembly of the embodiment of the utility model, when the lip surface of the positioning lip of the connecting rod bearing is flush with the joint surface of the two tiles, one of the first slot body and the second slot body is a full slot and the other is a half slot, the full slot refers to the slot spanning the head cover and the rod body, and the half slot refers to the slot arranged in the head cover or the rod body, that is, there is a deviation between the expansion cross-sections between the rod body and the head cover, and the deviation of the expansion cross-section between the rod body and the head cover is offset by setting the lip surface of the tile lower than the joint surface of the two tiles to offset the deviation of the expansion cross-section between the rod body and the head cover, or when the lip surface of the connecting rod bearing is lower than the joint surface of the two tiles, the first slot body and the second slot body are both set to a half slot, and the distance between the lip surface and the joint surface of the two tiles can offset the joint of the expansion cross-section between the rod body and the head cover, that is, the positioning lip of the connecting rod bearing can be better positioned in the first slot body and the second slot body after offsetting the deviation, thereby reducing the risk of circumferential rotation of the connecting rod bearing during engine operation and improving engine reliability.

[0007] According to the connecting rod assembly of the embodiment of the utility model, the tile includes a tile body and the positioning lip, the positioning lip protrudes from the outer side of the end of the tile body, the lip surface of the positioning lip facing the other tile is flat, and the splicing surface of the tile body facing the other tile is also flat.

[0008] According to the connecting rod assembly of the embodiment of the utility model, an inclined surface is provided on the outer side of the positioning lip so that the thickness of the positioning lip close to the lip surface is greater than the thickness away from the lip surface, and the depth of the first groove body and the second groove body close to the expansion section is less than the depth away from the expansion section.

[0009] According to the connecting rod assembly of the embodiment of the utility model, the tile body and the positioning lip are integrally formed, and the inner surface of the tile body and the inner side surface where the positioning lip is located are staggered so that the positioning lip protrudes from the tile body.

[0010] According to the connecting rod assembly of the embodiment of the utility model, the outer side wall of the tile body is provided with a connecting groove, and the positioning lip is connected in the connecting groove so that the outer side surface of the positioning lip protrudes from the tile body.

[0011] According to the connecting rod assembly of the embodiment of the utility model, the positioning lip and the first slot body or the second slot body are clearance-fitted.

[0012] According to the connecting rod assembly of the embodiment of the utility model, the distance of the lip surface below the splicing surface is m, and satisfies 0.5mm≤m≤2.0mm, and the deviation distance of the rod body and the head cover along the relative directions at the expansion surface is M, and satisfies 0≤M≤3mm.

[0013] According to the connecting rod assembly of the embodiment of the present utility model, the first groove or the second groove extends along the rod body to the head cover, and the center of the first groove or the second groove extending along the rod body to the head cover corresponds to the bulging fracture surface of the rod body and the head cover.

[0014] According to the connecting rod assembly of the embodiment of the present utility model, the butt joint direction of the rod body and the head cover is the same as the extending direction of the rod body, or the butt joint direction of the rod body and the head cover has an included angle with the extending direction of the rod body.

[0015] The embodiment of the present utility model also discloses a vehicle, including the above-mentioned connecting rod assembly.

[0016] The advantages of the vehicle compared with the prior art and the connecting rod assembly compared with the prior art are the same, and will not be elaborated here.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is the front view after the bulging fracture connection between the rod body and the head cover of the connecting rod in the embodiment of the present utility model;

[0020] Figure 2 is the side view after the bulging fracture connection between the rod body and the head cover in the embodiment of the present utility model;

[0021] Figure 3 is the structural schematic diagram of a tile of the connecting rod bearing shell in an embodiment of the present utility model;

[0022] Figure 4 is the structural schematic diagram of a tile of the connecting rod bearing shell in another embodiment of the present utility model;

[0023] Figure 5 is the present utility model Figure 4 the three-dimensional schematic diagram after the connection between two tiles in the embodiment;

[0024] Figure 6 is the present utility model Figure 4 the side view after the connection between two tiles in the embodiment;

[0025] Figure 7 is the schematic diagram of a setting method of the first groove and the second groove of the connecting rod of the present utility model;

[0026] Figure 8 It is a schematic diagram of another setting method for the first groove body and the second groove body of the connecting rod of the present utility model;

[0027] Figure 9 It is a schematic diagram of yet another setting method for the first groove body and the second groove body of the connecting rod of the present utility model;

[0028] Figure 10 It is a schematic diagram of a structure where a connecting rod bush of the present utility model is arranged in the first head hole and the second groove body is shown;

[0029] Figure 11 It is of the present utility model Figure 10 An enlarged view of part A;

[0030] Figure 12 It is a schematic diagram of a structure where a connecting rod bush of the present utility model is arranged in the first head hole and the first groove body is shown;

[0031] Figure 13 It is of the present utility model Figure 12 An enlarged view of part B;

[0032] Figure 14 It is a schematic diagram of another structure where a connecting rod bush of the present utility model is arranged in the first head hole;

[0033] Figure 15 It is of the present utility model Figure 14 An enlarged view of part C;

[0034] Figure 16 It is a schematic diagram of another layout method for the rod body and the head cover of the present utility model.

[0035] Reference numerals:

[0036] Connecting rod assembly 100,

[0037] Connecting rod 10,

[0038] Rod body 1, head cover 2, first head hole 3, connecting rod bush 4, tile 41, tile body 411, positioning lip 412, lip surface 413, splicing surface 414, inclined surface 415, connecting groove 416, tile back 42, expansion section 5, bolt 6, first groove body 7, second groove body 8, second head hole 9. Detailed implementation manners

[0039] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0041] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] The following refers to Figures 1 - 16 Describe the connecting rod assembly 100 according to an embodiment of the present utility model. When the lip surface 413 of the tile 41 is set to be flush with the splicing surface 414 of the two tiles 41, one of the first groove body 7 or the second groove body 8 is set as a full groove and the other is set as a half groove, so that the positioning lip 412 of one tile 41 can rotate relative to the full groove, thereby offsetting the deviation of the expansion section 5 between the rod body 1 and the head cover 2. Or when the lip surface 413 of the connecting rod tile 4 is lower than the splicing surface 414 of the two tiles 41, by setting both the first groove body 7 and the second groove body 8 as half grooves, the distance between the lip surface 413 lower than the splicing surface 414 of the two tiles 41 can offset the deviation of the expansion section 5 between the rod body 1 and the head cover 2, that is, the positioning lip 412 of the connecting rod tile 4 can be better positioned in the first groove body 7 and the second groove body 8, so that after eliminating the deviation, the connecting rod tile 4 is positioned, reducing the risk of circumferential rotation of the connecting rod tile 4, thereby reducing wear and improving the reliability of the engine.

[0043] As Figures 1 - 16As shown, a connecting rod assembly 100 according to an embodiment of the present utility model includes: a connecting rod 10 and a connecting rod bearing shell 4; the connecting rod 10 is provided with a first head hole 3, the connecting rod 10 is broken at the first head hole 3 into a rod body 1 and a head cover 2, and a broken surface 5 is formed at the broken part. The connecting rod 10 is provided with a first groove 7 and a second groove 8 that are axially spaced apart and circumferentially extend respectively at the first head hole 3; the connecting rod bearing shell 4 is fitted in the first head hole 3, the connecting rod bearing shell 4 includes two split shells 41 that are spliced relatively, and each split shell 41 is provided with a positioning lip 412 near the splicing part. Each positioning lip 412 of each split shell 41 is provided with a lip surface 413 facing the other split shell 41. The positioning lip 412 of one split shell 41 is located in the first groove 7 and the positioning lip 412 of the other split shell 41 is located in the second groove 8.

[0044] Wherein, when the lip surface 413 is lower than the splicing surface 414 of the two split shells 41, the first groove 7 is arranged on the rod body 1 and the second groove 8 is arranged on the head cover 2 and both open towards the broken surface 5, or when the lip surface 413 is flush with the splicing surface 414 of the two split shells 41, one of the first groove 7 and the second groove 8 extends along the rod body 1 to the head cover 2, and the other is arranged on the rod body 1 or the head cover 2.

[0045] In practice, the connecting rod 10 includes a first head hole 3 and a second head hole 9. The first head hole 3 is a big end hole. The connecting rod 10 is connected to a crankshaft at the first head hole 3 and is connected to a piston pin at the second head hole 9, so that when the piston moves, it drives the crankshaft to move through the connecting rod 10, thereby converting the up-and-down movement of the connecting rod 10 into the rotation of the crankshaft to output power.

[0046] Furthermore, generally, an oil injection passage is provided in the connecting rod 10 and the connecting rod bearing shell 4 to spray oil into the cylinder hole or the bottom of the piston through the lubricating oil in the oil injection passage. When the connecting rod bearing shell 4 rotates circumferentially relative to the connecting rod 10, it will also cause the oil injection passage to be misaligned, resulting in the loss of the oil injection function and the risk of abnormal wear of the cylinder hole and the piston skirt; in the embodiment of the present utility model, the first groove 7 and the second groove 8 are arranged on the inner wall of the first head hole 3 formed by the rod body 1 and the head cover 2, and the first groove 7 and the second groove 8 are axially spaced apart. At the same time, the connecting rod bearing shell 4 includes two split shells 41. After the two split shells 41 are spliced, they are installed at the first head hole 3, that is, the connecting rod bearing shell 4 is adapted to the first head hole 3. Each split shell 41 is provided with a positioning lip 412, and the two positioning lips 412 of the two split shells 41 are respectively arranged corresponding to the first groove 7 and the second groove 8, so that the two split shells 41 are positioned and installed at the first head hole 3.

[0047] Specifically, after the rod body 1 and the head cover 2 are disconnected by the way of expanding and breaking, and the rod body 1 and the head cover 2 are connected by bolts 6. The expanding and breaking method can make the fit between the rod body 1 and the head cover 2 better after connection. The precision of the expanding and breaking connecting rod 10 is very high, and the integrity of the combination of the rod body 1 and the head cover 2 is high. At the same time, the anti-transverse shear ability is strong. As long as the bolts 6 are not loose, the head cover 2 can hardly move transversely. Therefore, it can bear a stronger load than the ordinary connecting rod 10 and is very suitable for use in large-displacement and large-horsepower engines.

[0048] After expanding and breaking, the mating surface of the combined installation of the rod body 1 and the head cover 2 is the expanded section surface 5. The expanded section surface 5 of the connecting rod 10 is uneven and there is a deviation in the split surface. The splicing surface 414 of the two tiles 41 of the connecting rod bearing 4 corresponds to the expanded section surface 5 of the rod body 1 and the head cover 2. In the embodiment of the present invention, when the lip surface 413 of the positioning lip 412 is lower than the splicing surface 414 of the two tiles 41, the first groove 7 is arranged on the rod body 1 and the second groove 8 is arranged on the head cover 2, and both the first groove 7 and the second groove 8 open towards the expanded section surface 5, that is, both the first groove 7 and the second groove 8 are half grooves. When the two positioning lips 412 of the two tiles 41 are correspondingly arranged in the first groove 7 and the second groove 8, there is a gap between the lip surface 413 of the positioning lip 412 of each tile 41 and the splicing surface 414 between the two tiles 41, and this gap can offset the deviation generated by the expanded section surface 5 between the rod body 1 and the head cover 2, so that the tile 41 provided with the positioning lip 412 can be more appropriately positioned in the first head hole 3, and the risk of the entire connecting rod bearing 4 rotating circumferentially relative to the first head hole 3 can be reduced.

[0049] Similarly, when the lip surface 413 of the positioning lip 412 is flush with the splicing surface 414 of the two tiles 41, the first groove 7 is arranged to extend circumferentially along the inner wall of the first head hole 3 and extends from the part of the rod body 1 to the part of the head cover 2, and the second groove 8 is arranged to extend circumferentially along the inner wall of the first head hole 3 and the second groove 8 is arranged on the head cover 2 or the rod body 1, that is, the first groove 7 is a full groove and the second groove 8 is a half groove, and the second groove 8 opens towards the expanded section surface 5. The full groove can be understood as composed of two half grooves, that is, a groove extending both on the rod body 1 and on the head cover 2. At this time, after the two tiles 41 are spliced and installed in the first head hole 3 of the connecting rod 10, the positioning lip 412 of one tile 41 is positioned in the first groove 7, and the positioning lip 412 of the other tile 41 is arranged in the second groove 8. At this time, the rotation of the tile 41 in one direction can be restricted, and it can rotate partially in the other direction. By using the mechanism that the positioning lip 412 of the tile 41 can rotate in the full groove, the deviation of the expanded and broken split surface between the rod body 1 and the head cover 2 can be compensated.

[0050] Therefore, the connecting rod assembly 100 of the embodiment of the utility model utilizes the first groove body 7 and the second groove body 8 as positioning grooves, and is used in conjunction with the positioning lip 412 of the connecting rod bearing 4, which can compensate for the deviation of the expansion and breaking split surfaces of the rod body 1 and the head cover 2, and can realize the function of preventing the connecting rod bearing 4 from circumferential rotation.

[0051] In some embodiments, the tile 41 includes a tile body 411 and a positioning lip 412, the positioning lip 412 protrudes from the outer side of the end of the tile body 411, the lip surface 413 of the positioning lip 412 facing the other tile 41 is flat, and the splicing surface 414 of the tile body 411 facing the other tile 41 is also flat.

[0052] Reference Figure 3 and Figure 4 As shown, the positioning lip 412 of the tile 41 is arranged at a position close to the joint surface 414 of the two tiles 41, and the positioning lip 412 of the tile 41 protrudes from the tile body 411 along the inner and outer directions of the tile body 411, wherein the tile 41 is a semi-arc structure, the inner side of the tile 41 refers to the direction toward the center of the circle corresponding to the semi-arc structure of the tile 41, and the outer side refers to the tile back 42 of the tile 41, that is, the direction away from the center of the circle of the semi-arc structure; when the positioning lip 412 is along the tile When the inner side of 41 protrudes outward from the tile body 411, when the tile 41 is installed at the position of the first head hole 3 of the connecting rod 10, and the first groove body 7 and the second groove body 8 are set as half grooves, the corresponding lip surface 413 of the tile 41 is lower than the splicing surface 414 of the two tiles 41. Then, the surface difference between the lip surface 413 and the splicing surface 414 can offset the deviation of the expansion and breaking split surface between the rod body 1 and the head cover 2 of the connecting rod 10 when the two tiles 41 are connected and installed in the first head hole 3 of the connecting rod 10.

[0053] For example, the first groove body 7 is arranged on the rod body 1, and the second groove body 8 is arranged on the head cover 2. After the two tiles 41 are connected, the positioning lip 412 of one tile 41 cooperates with the first groove body 7, and the positioning lip 412 of the other tile 41 cooperates with the second groove body 8. The opening directions of the first groove body 7 and the second groove body 8 are opposite. After the two tiles 41 are spliced, a gap is left between the lip surface 413 of the positioning lip 412 of each tile 41 and the expansion surface 5. The gap can offset the deviation of the expansion and fracture dividing surfaces of the rod body 1 and the head cover 2. That is, at this time, the two tiles 41 are both positioned on the inner circumferential wall of the first head hole 3 of the connecting rod 10, thereby improving the positioning effect of the connecting rod 10 on the connecting rod bearing 4 and reducing the occurrence of the connecting rod bearing 4 burning. The burning bearing will seriously affect the performance and life of the engine, such as the engine will have problems such as power reduction, abnormal noise, and shaking. That is, if the positioning effect of the connecting rod bearing 4 is good, the performance and life of the engine can be improved, and the reliability of the engine can be improved.

[0054] By setting the labial surface 413 as a flat surface and the splicing surface 414 as a flat surface, the positioning lip 412 of the connecting rod bearing shell 4 can better cooperate with the first groove body 7 and the second groove body 8, thereby improving the cooperation effect between the connecting rod bearing shell 4 and the first head hole 3 of the connecting rod 10 and reducing the risk of circumferential rotation of the connecting rod bearing shell 4.

[0055] In some embodiments, a bevel surface 415 is provided on the outer side of the positioning lip 412, so that the thickness of the positioning lip 412 near the labial surface 413 is greater than the thickness away from the labial surface 413, and the depths of both the first groove body 7 and the second groove body 8 near the expansion section 5 are less than the depths away from the expansion section 5.

[0056] Refer to Figure 3 and Figure 4 As shown, the outer side surface of the positioning lip 412 is a bevel surface 415, and the bevel surface 415 makes the thickness of the positioning lip 412 thicker on the side close to the labial surface 413. Similarly, refer to Figure 7 、 Figure 8 and Figure 9 As shown, the depths of both the first groove body 7 and the second groove body 8 at the position close to the expansion section 5 are greater than the depths at the position away from the expansion section 5. When the bearing shell 41 is installed in the first head hole 3 of the connecting rod 10, the side of the bearing shell 41 close to the labial surface 413 can better cooperate and be positioned with the side of the first groove body 7 and the second groove body 8 close to the expansion section 5. That is, the thicker part of the positioning lip 412 and the deeper part of the first groove body 7 and the second groove body 8 can improve the reliability of positioning. At the same time, the bevel surface 415 of the positioning lip 412 and the side of the first groove body 7 and the second groove body 8 away from the expansion section 5 enable the positioning lip 412 to be installed more smoothly in the corresponding first groove body 7 and second groove body 8, that is, to better cooperate with the corresponding first groove body 7 and second groove body 8. At the same time, it can ensure better integrity between the bearing shell 41 and the connecting rod 10 after the bearing shell 41 is installed at the first head hole 3 of the connecting rod 10.

[0057] In some embodiments, the bearing shell body 411 and the positioning lip 412 are integrally formed, and the inner surface of the bearing shell body 411 is offset from the inner side surface at the position where the positioning lip 412 is located so that the positioning lip 412 protrudes from the bearing shell body 411.

[0058] That is to say, in actual manufacturing, the connecting rod bearing shell 4 includes two bearing shells 41, such as two bearing shells 41 including Figure 3 or both including Figure 4 two bearing shells 41, and the positioning lip 412 and the bearing shell body 411 of each bearing shell 41 are constructed to be integrally formed. Refer to Figure 3As shown in the figure, during the design, the inner side surface of the positioning lip 412 is set to be more towards the outside relative to the inner side surface of the tile body 411, that is, there is a stagger between the inner side surface of the positioning lip 412 and the inner side surface of the tile body 411 on the same side, so as to form a positioning lip 412 protruding outwards. In this way, the design of the positioning lip 412 can be satisfied to cooperate with the corresponding first groove 7 and second groove 8, and at the same time, it is convenient for manufacturing, without the need to separately connect or install the positioning lip 412, ensuring the integrity and reliability of the positioning lip 412 and the tile body 411.

[0059] Specifically, the positioning lips 412 of the two tiles 41 are located at the same-side ends of each tile 41. After the two semi-circular arc-shaped tiles 41 are spliced, the two positioning lips 412 can be axially staggered, and the lip surfaces 413 of the two positioning lips 412 can both face the expanded cross-section 5, so that the two positioning lips 412 at different axial positions of the connecting rod tile 4 are positioned and connected with the corresponding first groove 7 and second groove 8, thereby improving the reliability of the connecting rod tile 4 installed at the first head hole 3 of the connecting rod 10.

[0060] In some embodiments, a connecting groove 416 is provided on the outer side wall of the tile body 411, and the positioning lip 412 is connected in the connecting groove 416 so that the outer side surface of the positioning lip 412 protrudes from the tile body 411.

[0061] Refer to Figure 4 As shown in the figure, at this time, the inner side surface of the tile body 411 is a flat arc surface, and a connecting groove 416 is provided at the top of the tile back 42 of the semi-circular arc-shaped tile body 411. The positioning lip 412 can be welded in the connecting groove 416 to ensure the integrity of the positioning lip 412 and the tile body 411. Of course, during the design, the position of the tile body 411 where the positioning lip 412 is to be provided can be set as a protruding bump, and then processed into the structure of the positioning lip 412 and the inclined surface 415 of the positioning lip 412 protrudes from the outside of the tile body 411. At this time, it is equivalent to the positioning lip 412 and the connecting groove 416 being integrally provided, that is, the positioning lip 412 and the tile body 411 are also integrally formed, and only the outer side of the positioning lip 412 needs to protrude from the tile back 42 of the tile body 411. By setting the positioning lip 412 in this way, the positioning and cooperation mode of the positioning lip 412 with the corresponding first groove 7 and second groove 8 can also be satisfied, and at the same time, the flatness of the inner peripheral wall of the tile 41 can be improved, reducing friction and wear, thereby improving the efficiency and durability of the engine.

[0062] In some embodiments, the positioning lip 412 and the first groove 7 or the second groove 8 are both in clearance fit.

[0063] That is, one tile 41 is positioned and installed with the first groove body 7, and the other tile 41 is positioned and installed with the second groove body 8. There are gaps between the positioning lips 412 of the two tiles 41 and the corresponding first groove body 7 and second groove body 8 respectively, which can ensure that the positioning lips 412 can be smoothly installed into the corresponding first groove body 7 and second groove body 8. Moreover, for the case where the lip surface 413 of the positioning lip 412 in Figure 3 is flush with the splicing surface 414 of the two tiles 41, as shown in Figure 8 , the first groove body 7 is set as a full groove, and the second groove body 8 is set as a half groove. The positioning lip 412 of one tile 41 cooperates with the first groove body 7, and the positioning lip 412 of the other tile 41 cooperates with the second groove body 8. Then, since the positioning lip 412 has a clearance fit with both the first groove body 7 and the second groove body 8, the tile 41 positioned with the first groove body 7 can rotate slightly in the circumferential direction to offset the deviation of the fracture splitting surface of the rod body 1 and the head cover 2, preventing the risk of the two tiles 41 from not being in contact or interfering and causing the failure of the connecting rod tile 4. Figure 3 When the lip surface 413 of the positioning lip 412 is flush with the splicing surface 414 of the two tiles 41, as Figure 8 shown, the first groove body 7 is set as a full groove, and the second groove body 8 is set as a half groove. The positioning lip 412 of one tile 41 cooperates with the first groove body 7, and the positioning lip 412 of the other tile 41 cooperates with the second groove body 8. Then, since the positioning lip 412 has a clearance fit with both the first groove body 7 and the second groove body 8, the tile 41 positioned with the first groove body 7 can rotate slightly in the circumferential direction to offset the deviation of the fracture splitting surface of the rod body 1 and the head cover 2, preventing the risk of the two tiles 41 from not being in contact or interfering and causing the failure of the connecting rod tile 4.

[0064] Refer to Figures 10 - 13 shown, which represents the clearance fit state of the positioning lip 412 of the tile 41 in Figure 3 with the first groove body 7 or the second groove body 8. Figure 3 The clearance fit state of the positioning lip 412 of the tile 41 with the first groove body 7 or the second groove body 8 is shown in Figures 14 - 15 . Figures 14 - 15 Shown in Figures 14 - 15 , which represents Figure 4 the clearance fit state of the positioning lip 412 of the tile 41 in Figure 4 with the first groove body 7.

[0065] In some embodiments, the distance by which the lip surface 413 is lower than the splicing surface 414 is m, and 0.5 mm ≤ m ≤ 2.0 mm is satisfied. The deviation distance of the rod body 1 and the head cover 2 in the relative direction at the fracture surface 5 is M, and 0 ≤ M ≤ 3 mm is satisfied.

[0066] In practice, referring to Figure 1 and Figure 2 shown, the deviation of the rod body 1 and the head cover 2 at the fracture surface 5 is M, that is, the distance by which the lip surface 413 of the positioning lip 412 of each tile 41 is lower than the splicing surface 414 is within the deviation range at the fracture surface 5 of the rod body 1 and the head cover 2. This can make the positioning lip 412 of the tile 41 convenient for positioning and installation with the first groove body 7 and the second groove body 8, and can compensate for the deviation, reducing the deviation at the fracture surface 5 of the rod body 1 and the head cover 2 as much as possible. The range of M is generally determined according to the size of the connecting rod 10 and the process level, and generally needs to be ≤ 3 mm, so as to ensure the integrity of the rod body 1 and the head cover 2 of the connecting rod 10 after being connected by the bolt 6. Figure 1 and Figure 2 Shown in Figure 1 and Figure 2 , the deviation of the rod body 1 and the head cover 2 at the fracture surface 5 is M, that is, the distance by which the lip surface 413 of the positioning lip 412 of each tile 41 is lower than the splicing surface 414 is within the deviation range at the fracture surface 5 of the rod body 1 and the head cover 2. This can make the positioning lip 412 of the tile 41 convenient for positioning and installation with the first groove body 7 and the second groove body 8, and can compensate for the deviation, reducing the deviation at the fracture surface 5 of the rod body 1 and the head cover 2 as much as possible. The range of M is generally determined according to the size of the connecting rod 10 and the process level, and generally needs to be ≤ 3 mm, so as to ensure the integrity of the rod body 1 and the head cover 2 of the connecting rod 10 after being connected by the bolt 6.

[0067] In some embodiments, the first groove body 7 or the second groove body 8 extends along the rod body 1 to the head cover 2, and the center of the first groove body 7 or the second groove body 8 that extends along the rod body 1 to the head cover 2 corresponds to the fracture surface 5 of the rod body 1 and the head cover 2.

[0068] Refer to Figure 8 andFigure 9 As shown Figure 8 In the first groove body 7 extends along the rod body 1 to the head cover 2, that is, the first groove body 7 is a full groove, and the second groove body 8 is arranged on the head cover 2, and the second groove body 8 is a half groove; at this time, a Figure 3 The tile 41 in is installed in the first head hole 3 and the positioning lip 412 of the tile 41 is located at the first groove body 7, and another Figure 3 The tile 41 in is installed in the first head hole 3 and the positioning lip 412 of the tile 41 is located at the second groove body 8. At this time, after the second groove body 8 cooperates with the positioning lip 412 of a tile 41, the other tile 41 can rotate circumferentially relative to the first groove body 7 of the full groove to offset the deviation at the expanded cross-section 5 of the rod body 1 and the head cover 2.

[0069] Specifically, that is Figure 8 The half groove of the second groove body 8 in can limit the clockwise rotation of the tile 41. After the tile 41 cooperates with the first groove body 7 to offset the deviation, it is equivalent to the circumferential direction of the entire connecting rod tile 4 being limited, thereby ensuring the stability and reliability of the connecting rod tile 4.

[0070] In addition, Figure 9 The first groove body 7 in is arranged on the rod body 1, the first groove body 7 is a half groove, the second groove body 8 extends along the rod body 1 to the head cover 2, and the second groove body 8 is arranged as a full groove. At this time, a Figure 3 The tile 41 in is installed in the first head hole 3 and the positioning lip 412 of the tile 41 is located at the first groove body 7, and another Figure 3 The tile 41 in is installed in the first head hole 3 and the positioning lip 412 of the tile 41 is located at the second groove body 8. At this time, after the first groove body 7 cooperates with the positioning lip 412 of a tile 41, the other tile 41 can rotate circumferentially relative to the second groove body 8 of the full groove to offset the deviation at the expanded cross-section 5 of the rod body 1 and the head cover 2. That is Figure 9 And Figure 8 Have the same function, both are designed with a half groove and a full groove so that the positioning groove of a tile 41 can rotate circumferentially relative to the first head hole 3 to offset the expansion break deviation.

[0071] By setting the center of the full groove corresponding to the expanded cross-section 5 of the rod body 1 and the head cover 2, that is, the full groove includes two half grooves opening towards the expanded cross-section 5, and the distances from the two half grooves to the expanded cross-section 5 are basically equal, it can not only prevent the positioning lip 412 of the tile 41 from rotating a large range relative to the full groove, but also enable the tile 41 to rotate slightly at the position of the full groove to offset the deviation and the force is evenly distributed.

[0072] In some embodiments, the docking direction of the rod body 1 and the head cover 2 is consistent with the extending direction of the rod body 1, or the docking direction of the rod body 1 and the head cover 2 has an included angle with the extending direction of the rod body 1.

[0073] In practice, the docking direction of the rod body 1 and the head cover 2 in the embodiment of the present utility model can be consistent with the extending direction of the rod body 1. For example, Figure 1 and Figure 2 as shown, the rod body 1 and the head cover 2 are docked in the up and down direction of Figure 1 and Figure 2 , the rod body 1 extends in the up and down direction. At this time, two tiles 41 are arranged in the first head hole 3 of the rod body 1, and the positioning lips 412 of the two tiles 41 and the corresponding first groove body 7 and second groove body 8 cooperate to circumferentially position the connecting rod tile 4 in the first head hole 3.

[0074] Similarly, as Figure 16 shown, when the docking direction of the rod body 1 and the head cover 2 of the connecting rod 10 has an included angle with the extending direction of the rod body 1, the docking direction is perpendicular to the direction of the expansion section 5, and a perpendicular line is drawn along the center of the first head hole 3 perpendicular to the extending direction of the rod body 1, that is, Figure 16 the included angle α in is equivalent to the included angle between the docking direction of the rod body 1 and the head cover 2 and the extending direction of the rod body 1. At this time, the first groove body 7 and the second groove body 8 which are axially spaced apart can also be arranged on the inner wall of the first head hole 3, and the positioning lips 412 of the two docked tiles 41 are respectively matched with the corresponding first groove body 7 and second groove body 8, which can also limit the circumferential position of the connecting rod tile 4 and reduce the risk of circumferential rotation of the connecting rod tile 4 during the operation of the engine.

[0075] The embodiment of the present utility model also discloses a vehicle, including the above-mentioned connecting rod assembly 100. When the lip surface 413 of the tile 41 is set to be flush with the splicing surface 414 of the two tiles 41, one of the first groove body 7 and the second groove body 8 is set as a full groove and the other is set as a half groove so that the positioning lip 412 of the tile 41 can rotate relative to the full groove, thereby offsetting the deviation of the expansion section 5 between the rod body 1 and the head cover 2. Or when the lip surface 413 of the connecting rod tile 4 is lower than the splicing surface 414 of the two tiles 41, by setting both the first groove body 7 and the second groove body 8 as half grooves, the distance between the lip surface 413 and the splicing surface 414 of the two tiles 41 can offset the splicing part of the expansion section 5 between the rod body 1 and the head cover 2, that is, after offsetting the deviation, the positioning lip 412 of the connecting rod tile 4 can be better positioned in the first groove body 7 and the second groove body 8, reducing the risk of circumferential rotation of the connecting rod tile 4 during the operation of the engine, reducing wear and improving the reliability of the engine, thereby improving the driving stability of the vehicle.

[0076] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0077] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A connecting rod assembly, characterized in that, Comprising: A connecting rod, which is provided with a first head hole. The connecting rod is fractured into a rod body and a head cover at the first head hole, and a fractured surface is formed at the fracture position. The connecting rod is provided with a first groove and a second groove which are axially spaced apart and circumferentially extend respectively at the first head hole. A connecting rod bearing shell, which is fitted in the first head hole. The connecting rod bearing shell includes two relatively spliced tiles, and each tile is provided with a positioning lip near the splicing position. The positioning lip of each tile has a lip surface facing the other tile. The positioning lip of one tile is located in the first groove and the positioning lip of the other tile is located in the second groove. Wherein, when the lip surface is lower than the splicing surface of the two tiles, the first groove is arranged on the rod body and the second groove is arranged on the head cover and both open towards the fractured surface; or when the lip surface is flush with the splicing surface of the two tiles, one of the first groove and the second groove extends along the rod body to the head cover, and the other is arranged on the rod body or the head cover.

2. The connecting rod assembly according to claim 1, characterized in that, The tile includes a tile body and the positioning lip. The positioning lip protrudes outside the end of the tile body. The lip surface of the positioning lip facing the other tile is a plane, and the splicing surface of the tile body facing the other tile is also a plane.

3. The connecting rod assembly according to claim 2, characterized in that, The outer side of the positioning lip is provided with an inclined surface, so that the thickness of the positioning lip near the lip surface is greater than the thickness away from the lip surface. The depths of both the first groove and the second groove near the fractured surface are less than the depths away from the fractured surface.

4. The connecting rod assembly according to claim 3, characterized in that, The tile body and the positioning lip are integrally formed, and the inner surface of the tile body is staggered from the inner side surface at the position of the positioning lip so that the positioning lip protrudes from the tile body.

5. The connecting rod assembly according to claim 2, characterized in that, The outer side wall of the tile body is provided with a connecting groove, and the positioning lip is connected in the connecting groove so that the outer side surface of the positioning lip protrudes from the tile body.

6. The connecting rod assembly according to claim 1, wherein, The positioning lip and the first groove or the second groove are in clearance fit.

7. The connecting rod assembly according to claim 1, wherein, The distance that the lip surface is lower than the splicing surface is m, and 0.5mm ≤ m ≤ 2.0mm is satisfied. The deviation distance of the rod body and the head cover in the relative direction at the fractured surface is M, and 0 ≤ M ≤ 3mm is satisfied.

8. The connecting rod assembly according to claim 1, characterized in that, The first groove or the second groove extends along the rod body to the head cover, and the center of the first groove or the second groove extending along the rod body to the head cover corresponds to the fractured surface of the rod body and the head cover.

9. The connecting rod assembly according to claim 1, characterized in that The butting direction of the rod body and the head cover is consistent with the extending direction of the rod body, or the butting direction of the rod body and the head cover has an included angle with the extending direction of the rod body.

10. A vehicle, characterized in that, Including the connecting rod assembly according to any one of claims 1-9.

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