Dustproof engine connecting rod bolt

Abstract

The utility model relates to the technical field of engine connecting rods, and discloses a dustproof engine connecting rod bolt which comprises a first end, a second end, a connecting rod and a bolt body, the annular first end and the annular second end are arranged at the two ends of the connecting rod respectively, the first end is connected with a connecting rod at the position of a piston in an engine, and the second end is connected with the bolt body. The second end is connected with a connecting rod body in an engine, the piston moves up and down to drive the connecting rod to do stroke motion, meanwhile, the first end and the second end rotate with the connecting rod connected with the first end and the second end respectively, and heat conduction layers are arranged on the inner sides of circular rings of the first end and the second end. Annular air bags are arranged on the upper side and the lower side of the heat conduction layer, the air bags are made of elastic materials and are filled with gas which is prone to thermal expansion and is not fully filled, the bolt body is arranged at the second end, sealing is achieved through the wrapping effect of the air bags on the connecting position, and the situation that dust enters the moving connecting position, and consequently parts are abraded is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of engine connecting rods, in particular to a dustproof engine connecting rod bolt. Background Art

[0002] The connecting rod bolt of the engine is an important bolt that connects the connecting rod big end bearing seat and the bearing cover, making them a whole. The bolt head is connected to the screw and needs to be used in conjunction with the nut. When the engine is working, the connecting rod bolt is subjected to the preload during assembly and the reciprocating inertia force during operation. The connecting rod bolt is made of high-quality alloy steel (such as chrome steel or nickel-chromium steel) after tempering and precision machining. It has high strength and toughness and has strict requirements on thread grade, form and position tolerance, etc. This bolt is a special bolt and cannot be replaced by ordinary bolts.

[0003] When a vehicle is driving, especially in harsh environments such as dusty or construction areas, a large amount of dust and particles may be sucked into the engine. These particles may enter the engine through the air intake, intake duct or other gaps. Dust particles will form abrasives at the connecting rod bolt connection. These abrasives will rub against the metal surface when the engine is running, causing the surface wear of components such as bolts, nuts and connecting seats to increase. Over a long period of time, this wear will reduce the strength and precision of the components and may even cause the bolts to loosen or break, creating gaps between components that were originally tightly combined by pre-tightening force. This gap will cause the bolts to gradually loosen under vibration and impact, thereby affecting the stability of the connecting rod and the normal operation of the engine. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a dustproof engine connecting rod bolt, which has the advantages of good dustproof and heat dissipation, and solves the problem of dust entering the engine.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of dustproof and good heat dissipation, the utility model provides the following technical solutions: a dustproof engine connecting rod bolt, comprising a first end head, a second end head, a connecting rod and a bolt body, wherein the two ends of the connecting rod are respectively provided with an annular first end head and a second end head, the first end head is connected to the connecting rod at the piston in the engine, and the second end head is connected to the connecting rod body in the engine, and the connecting rod is driven to perform a stroke motion by the up and down movement of the piston, and at the same time, the first end head and the second end head respectively generate a rotational motion with the connecting rod connected to themselves, a heat-conducting layer is provided on the inner side of the circular ring of the first end head and the second end head, and annular air bags are provided on the upper and lower sides of the heat-conducting layer, the air bags are made of elastic material, and are filled with heat-expanding gas inside, and are not fully filled, and the bolt body is arranged at the second end head.

[0008] Preferably, the airbag at the first end is connected to the airbag at the second end through an airbag channel, so that the inside of the airbag is connected. The rotation and heat generated by the second end are greater than the heat generated by the first end. The setting of the airbag channel avoids insufficient expansion volume and insufficient sealing of the airbag at the first end. At the same time, it can avoid excessive expansion of the airbag at the second end, resulting in damage.

[0009] Preferably, the airbag is made of polyurethane, and the gas filled in the airbag is nitrogen. The polyurethane material also has high elasticity and wear resistance, and the airbag made can have better wrapping and service life. Its friction coefficient is also relatively low, which makes the airbag smoother when moving, avoiding excessive resistance and preventing the engine from moving. In addition, the polyurethane material also has good processing performance and can be easily made into various shapes. Nitrogen is an inert gas with stable chemical properties and is not easy to react with other substances. Its thermal expansion property makes it suitable for the application of airbags, and the thermal conductivity of nitrogen is slightly better than that of air.

[0010] Preferably, the surface of the connecting rod is provided with downwardly inclined lines, and the lines are shallow near the center of the connecting rod and deep near the outer side of the connecting rod.

[0011] Preferably, an expansion pad is provided between the bolt body and the second end head, and the expansion pad can expand and wrap around the bolt body when heated.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a dustproof engine connecting rod bolt, which has the following beneficial effects:

[0014] 1. The dustproof engine connecting rod bolt has an airbag with a gas that expands when heated. When the airbag receives heat generated by the heat-conducting layer, the airbag expands to wrap and cover the gap between the first end and the second end and the connecting rod. The elastic material of the airbag can fit tightly to the surface of the rotating shaft to form an effective sealing layer to prevent dust, moisture and other pollutants from entering the connection. This helps to keep the internal environment of the engine clean and reduce wear and failure caused by the entry of impurities. The elasticity of the airbag can also absorb and cushion the vibration and impact generated by the rotating shaft during rotation to a certain extent, further improving the stability and reliability of the engine. The elasticity of the airbag can also absorb and cushion the vibration and impact generated by the rotating shaft during rotation to a certain extent, further improving the stability and reliability of the engine. The design of the airbag has a certain elasticity and can adapt to the slight deformation of the rotating shaft under different working conditions. This enables the engine to maintain good sealing and rotation performance when facing harsh working environments such as high temperature and high pressure. The airbag is a detachable and replaceable component, which is easy to repair and replace when needed. When the airbag is worn or damaged, it can be easily removed and replaced with a new airbag without large-scale disassembly of the entire engine.

[0015] 2. The dustproof engine connecting rod bolt can effectively guide the heat generated at the connecting rod connection into the airbag by setting the heat conductive layer, which helps to transfer heat from key components, reduce their operating temperature, and improve the thermal efficiency of the engine. At the same time, the heated and expanded gas in the airbag can absorb and store this heat, play a role as a thermal buffer, and reduce the potential impact of heat on other parts of the engine. By guiding the heat into the airbag through the heat conductive layer, it can be ensured that the airbag is evenly heated to avoid damage caused by local overheating. This uniform heating helps to extend the service life of the airbag and improve its durability. Since the setting of the airbag and the heat conductive layer can effectively manage heat, the design requirements of the engine cooling system may be reduced accordingly, which helps to simplify the structure of the cooling system, reduce manufacturing costs, and improve the reliability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the heat-conducting layer of the utility model;

[0018] Figure 3 It is a detailed schematic diagram of the bolt of the utility model.

[0019] In the figure: 1, first end; 2, second end; 3, connecting rod; 4, bolt body; 41, expansion pad; 101, airbag; 102, airbag channel; 103, heat conductive layer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 3 A dustproof engine connecting rod bolt comprises a first end 1, a second end 2, a connecting rod 3 and a bolt body 4, wherein the connecting rod 3 is provided with an annular first end 1 and a second end 2 at both ends, wherein the first end 1 is connected to a connecting rod at a piston in an engine, and the second end 2 is connected to a connecting rod body in an engine, wherein the connecting rod 3 is driven to perform a stroke motion by the up and down motion of the piston, and the first end 1 and the second end 2 respectively generate a rotation motion with the connecting rod connected to themselves, wherein a heat conducting layer 103 is provided on the inner side of the circular ring of the first end 1 and the second end 2, and an annular air bag 101 is provided on the upper and lower sides of the heat conducting layer 103, and the air bag 101 is made of an elastic material , and the interior is filled with heat-expandable gas, but not fully filled. When the piston movement drives the connecting rod 3 to move, the first end 1 and the second end 2 rotate relative to the connecting rod to generate friction, so that the heat is concentrated on the heat-conducting layer 103. The heat-conducting layer 103 is provided with annular airbags 101 on the upper and lower sides, respectively. The airbags 101 are provided with heat-expandable gas. When the airbags 101 receive the heat generated by the heat-conducting layer 103, the airbags 101 expand to wrap and cover the gap between the first end 1 and the second end 2 and the connecting rod. The elastic material of the airbags 101 can fit tightly to the surface of the rotating shaft to form an effective sealing layer to prevent dust, moisture and other contaminants from entering the connection. This helps to keep the internal environment of the engine clean and reduce wear and failure caused by the entry of impurities. The elasticity of the airbags 101 can also absorb and buffer the vibration and impact generated by the rotating shaft during the rotation process to a certain extent, further improving the stability and reliability of the engine.

[0022] The airbag 101 at the first end 1 is connected to the airbag 101 at the second end 2 through an airbag channel 102, so that the inside of the airbag 101 is connected. The rotation and heat generated by the second end 2 are greater than the heat generated by the first end 1. The setting of the airbag channel 102 prevents the airbag 101 at the first end 1 from expanding insufficiently and having insufficient sealing. At the same time, it can prevent the airbag 101 at the second end 2 from expanding too much and causing damage.

[0023] The airbag 101 is made of polyurethane, and the gas filled in the airbag 101 is nitrogen. The polyurethane material also has high elasticity and wear resistance, and the airbag 101 made can have better wrapping and service life. Its friction coefficient is also relatively low, which makes the airbag 101 smoother when moving, avoiding excessive resistance and preventing the engine from moving. In addition, the polyurethane material also has good processing performance and can be easily made into various shapes. Nitrogen is an inert gas with stable chemical properties and is not easy to react with other substances. Its thermal expansion property makes it suitable for the application of airbags, and the thermal conductivity of nitrogen is slightly better than that of air.

[0024] The surface of the connecting rod 3 is provided with downward sloping textures, and the textures are shallow near the center of the connecting rod 3 and deep near the outside of the connecting rod 3. The downward sloping texture design can effectively prevent dust from adhering to the surface of the connecting rod 3. When the engine is running, the airflow will flow along the inclined direction of the texture, making it difficult for dust particles to stay on the surface of the connecting rod 3, thereby reducing dust accumulation. The deep texture design on the outside can increase the surface area of ​​the connecting rod 3, thereby increasing the heat dissipation area, which helps to more effectively dissipate the heat generated by the connecting rod 3 to the surrounding environment and reduce the operating temperature of the connecting rod 3. The inclined design of the road helps to guide the airflow to form a flow pattern on the surface of the connecting rod 3 that is more conducive to heat dissipation. The airflow can more easily penetrate the gaps between the textures, take away more heat, and improve the heat dissipation efficiency.

[0025] The bolt body 4 is arranged at the second end 2, and an expansion pad 41 is provided between the bolt body 4 and the second end 2. The expansion pad 41 can expand and wrap the bolt body 4 when heated, effectively preventing dust from entering the internal thread and causing wear or loose connection.

[0026] Working principle: The two ends of the connecting rod 3 are respectively the first end 1 and the second end 2. The first end 1 is connected to the piston of the engine, and the second end 2 is connected to the connecting rod body of the engine. The up and down movement of the piston drives the connecting rod 3 to perform a stroke movement. At this time, the first end 1 and the second end 2 are respectively rotated with the connecting rods connected to themselves. The first end 1 and the second end 2 are provided with a heat conducting layer 103. The friction generated by the rotation makes the heat concentrate on the heat conducting layer 103. Figure 2, annular airbags 101 are respectively arranged on the upper and lower sides of the heat-conducting layer 103, and the airbags 101 are provided with a gas that is easily expanded when heated. When the airbags 101 receive the heat generated by the heat-conducting layer 103, the airbags 101 expand, and the gap between the first end 1 and the second end 2 and the connecting rod is wrapped and blocked. The elastic material of the airbags 101 can fit the surface of the rotating shaft tightly, forming an effective sealing layer to prevent dust, moisture and other contaminants from entering the connection. This helps to keep the internal environment of the engine clean and reduce wear and failure caused by the entry of impurities. The elasticity of the airbags 101 can also absorb and buffer the vibration and impact generated by the rotating shaft during the rotation process to a certain extent, further improving the stability and reliability of the engine.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dustproof engine connecting rod bolt, comprising a first end (1), a second end (2), a connecting rod (3) and a bolt body (4), characterized in that: The connecting rod (3) is provided with an annular first end head (1) and a second end head (2) at both ends, the first end head (1) is connected to the connecting rod at the piston in the engine, and the second end head (2) is connected to the connecting rod body in the engine. The connecting rod (3) is driven to perform stroke motion by the up and down movement of the piston. At the same time, the first end head (1) and the second end head (2) respectively generate rotational motion with the connecting rod connected to themselves. A heat-conducting layer (103) is provided on the inner side of the circular ring of the first end head (1) and the second end head (2). An annular air bag (101) is provided on the upper and lower sides of the heat-conducting layer (103). The air bag (101) is made of elastic material and is filled with a gas that is easily expanded by heat, but is not fully filled. The bolt body (4) is arranged at the second end head (2).

2. The dustproof engine connecting rod bolt according to claim 1, characterized in that: The airbag (101) at the first end (1) is connected to the airbag (101) at the second end (2) via an airbag channel (102), so that the interiors of the airbags (101) are connected.

3. The dustproof engine connecting rod bolt according to claim 2, characterized in that: The airbag (101) is made of polyurethane, and the gas filled in the airbag (101) is nitrogen.

4. The dustproof engine connecting rod bolt according to claim 1, characterized in that: The surface of the connecting rod (3) is provided with downwardly inclined lines, and the lines are shallow near the center of the connecting rod (3) and deep near the outer side of the connecting rod (3).

5. The dustproof engine connecting rod bolt according to claim 1, characterized in that: An expansion pad (41) is provided between the bolt body (4) and the second end head (2), and the expansion pad (41) can expand and wrap around the bolt body (4) when heated.

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