Crankshaft connecting rod mechanism, engine and vehicle

Abstract

The utility model belongs to the technical field of engines, and particularly relates to a crankshaft connecting rod mechanism, an engine and a vehicle. The crankshaft connecting rod mechanism comprises a connecting rod and a crankshaft one-way valve, a first connecting hole, a second connecting hole and a connecting rod oil channel are formed in the connecting rod, and the first connecting hole and the second connecting hole are located in the two ends of the connecting rod respectively and communicated through the connecting rod oil channel. The crankshaft is arranged in the first connecting hole in a penetrating manner, and a crankshaft oil duct is arranged in the crankshaft and can communicate with the connecting rod oil duct; the one-way valve is arranged in the connecting rod oil duct and located at the end, communicated with the first connecting hole, of the connecting rod oil duct, and when the crankshaft oil duct is communicated with the connecting rod oil duct, the one-way valve can be opened under the action of oil pressure. By means of the crankshaft connecting rod mechanism in the technical scheme, oil liquid backflow can be effectively prevented, the cavitation phenomenon is reduced, the pressure building process is rapid when an engine is started, and the good lubricating and cooling effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a crankshaft connecting rod mechanism, an engine and a vehicle. Background Art

[0002] The engine's crankshaft-connecting rod mechanism converts the reciprocating motion of the pistons into rotational motion of the crankshaft. This in turn converts the force exerted on the pistons into torque output by the crankshaft, driving the vehicle's wheels. The lubrication system in this mechanism primarily reduces friction, lowers temperatures, absorbs vibration, and prevents wear and corrosion. Lubrication of the crankshaft-connecting rod mechanism involves several key areas, including the contact surface between the connecting rod and crankshaft, the connection between the piston pin and piston, lubrication within the crankcase, and lubrication between the crankshaft bearings and the crankcase bottom. Lubrication of these areas is crucial for proper engine operation.

[0003] In the existing technology, oil is supplied by the crankshaft oil channel, and the lubricating oil is transported to the connecting rod small end through the connecting rod big end. The connecting rod and the lubricating oil are affected by factors such as reciprocating inertia force and rotational inertia force. In addition, the crankshaft cannot continuously provide oil pressure, resulting in the lubricating oil flowing back from the connecting rod small end to the connecting rod big end at certain times, which fails to achieve the purpose of lubrication and cooling. In addition, the reciprocating motion causes large pressure fluctuations, and cavitation is prone to occur near the connecting rod bearing hole.

[0004] Therefore, it is urgent to propose a crankshaft connecting rod mechanism, an engine and a vehicle to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to at least solve the problem of lubricating oil backflow affecting the cooling effect and pressure fluctuations causing cavitation. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the present invention provides a crankshaft-connecting rod mechanism, comprising:

[0007] A connecting rod, wherein the connecting rod is provided with a first connecting hole, a second connecting hole and a connecting rod oil passage, wherein the first connecting hole and the second connecting hole are respectively located at two ends of the connecting rod and are connected through the connecting rod oil passage;

[0008] a crankshaft, the crankshaft being passed through the first connecting hole, the crankshaft being provided with a crankshaft oil passage, the crankshaft oil passage being capable of communicating with the connecting rod oil passage;

[0009] A one-way valve is arranged in the connecting rod oil passage and is located at one end where the connecting rod oil passage is connected to the first connecting hole. When the crankshaft oil passage and the connecting rod oil passage are connected, the one-way valve can be opened under the action of oil pressure.

[0010] The crankshaft-connecting rod mechanism in the present technical solution is provided with a one-way valve in the connecting rod oil passage. When the crankshaft oil passage in the crankshaft and the connecting rod oil passage in the connecting rod are connected, the oil is transported from the crankshaft oil passage to the connecting rod oil passage. The one-way valve opens under the action of the oil pressure, allowing the oil to be transported to the second connecting hole for lubrication and cooling. When the crankshaft oil passage in the crankshaft and the connecting rod oil passage in the connecting rod are not connected, the oil pressure decreases and the one-way valve returns to its naturally closed state. The oil in the connecting rod oil passage is blocked by the one-way valve and will not flow back toward the first connecting hole, thereby reducing the pressure fluctuation caused by the downward inertial force of the oil and reducing the cavitation phenomenon near the first connecting hole; and the components at the first connecting hole are more lubricated and adequately cooled, reducing wear between components and improving the reliability and stability of the crankshaft-connecting rod mechanism; in addition, when no one-way valve is provided, due to the gap outside the crankshaft, the oil in the connecting rod oil passage will gradually leak toward the first connecting hole after shutdown. When the engine is started, the oil needs to gradually fill the connecting rod oil passage, and the pressure building process is slow, which poses a risk of wear. When a one-way valve is provided, after the engine is shut down, the one-way valve blocks the connecting rod oil passage, and oil exists in the connecting rod oil passage, thereby accelerating the oil pressure building process when the engine is started, and allowing the second connecting hole to be quickly lubricated and cooled.

[0011] In addition, the crankshaft-connecting rod mechanism according to the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, the one-way valve includes a one-way valve body, which is an elastic member and can be closed under the action of its own elastic restoring force.

[0013] In some embodiments of the present invention, the one-way valve includes a base, a connecting hole is provided on the base, the connecting hole is connected to the connecting rod oil channel, the one-way valve body is connected to the base, when the one-way valve body is closed, the one-way valve body can block the connecting hole, and the outer side of the base is sealed with the wall of the connecting rod oil channel.

[0014] In some embodiments of the present invention, the one-way valve body includes a sleeve section, which is sleeved on the base, and the outer side of the sleeve section is in sealing contact with the wall of the connecting rod oil channel.

[0015] In some embodiments of the present invention, the base includes a first section and a second section connected to each other, the outer diameter of the first section is smaller than the outer diameter of the second section, the sleeve section is sleeved on the first section, and the second section is sealed and connected to the wall of the connecting rod oil channel.

[0016] In some embodiments of the present invention, the second section is provided with an external thread, the wall surface of the connecting rod oil passage is provided with an internal thread, and the second section and the wall surface of the connecting rod oil passage are threadedly connected.

[0017] In some embodiments of the present invention, the connecting rod oil channel includes a first oil channel and a second oil channel that are interconnected, the first oil channel is connected to the first connecting hole, the second oil channel is connected to the second connecting hole, the inner diameter of the first oil channel is larger than the inner diameter of the second oil channel, so as to form a stepped surface at the junction of the first oil channel and the second oil channel, and the one-way valve abuts against the stepped surface.

[0018] In some embodiments of the present invention, a connecting rod bearing is provided in the first connecting hole, the connecting rod bearing is sleeved on the crankshaft, an oil hole is provided on the connecting rod bearing, the oil hole is connected to the connecting rod oil channel, the crankshaft oil channel can be connected to the oil hole, and the orifice edge of the oil hole is rounded.

[0019] The utility model also provides an engine, which includes a piston, a piston pin and the crankshaft connecting rod mechanism in the above embodiment, wherein the piston pin is inserted into the second connecting hole, and the piston is connected to the connecting rod through the piston pin.

[0020] The utility model also provides a vehicle, which includes the engine in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components. In the accompanying drawings:

[0022] Figure 1 This is a cross-sectional schematic diagram of the crankshaft connecting rod mechanism provided by the present invention when the one-way valve is open;

[0023] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0024] Figure 3 This is a cross-sectional schematic diagram of the crankshaft connecting rod mechanism provided by the present invention when the one-way valve is closed;

[0025] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0026] In the picture:

[0027] 100, connecting rod; 110, first connecting hole; 120, second connecting hole; 130, connecting rod oil passage; 200, crankshaft; 210, crankshaft oil passage; 300, piston; 400, one-way valve; 410, one-way valve body; 420, base; 500, connecting rod bearing; 510, oil hole; 600, piston pin; 700, bushing. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0030] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0031] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0032] See also Figures 1 to 4 This embodiment provides a crankshaft-connecting rod mechanism, including a connecting rod 100, a crankshaft 200 and a one-way valve 400. The connecting rod 100 is provided with a first connecting hole 110, a second connecting hole 120 and a connecting rod oil passage 130. The first connecting hole 110 and the second connecting hole 120 are respectively located at two ends of the connecting rod 100 and are connected through the connecting rod oil passage 130; the crankshaft 200 is passed through the first connecting hole 110, and a crankshaft oil passage 210 is provided in the crankshaft 200, and the crankshaft oil passage 210 can be connected to the connecting rod oil passage 130; the one-way valve 400 is arranged in the connecting rod oil passage 130, located at one end where the connecting rod oil passage 130 is connected to the first connecting hole 110. When the crankshaft oil passage 210 and the connecting rod oil passage 130 are connected, the one-way valve 400 can be opened under the action of oil pressure.

[0033] The above-mentioned crankshaft-connecting rod mechanism is provided with a one-way valve 400 in the connecting rod oil passage 130. When the crankshaft oil passage 210 in the crankshaft 200 and the connecting rod oil passage 130 in the connecting rod 100 are connected, oil is transported from the crankshaft oil passage 210 to the connecting rod oil passage 130. The one-way valve 400 opens under the action of oil pressure, allowing the oil to be transported to the second connecting hole 120 for lubrication and cooling. When the crankshaft oil passage 210 in the crankshaft 200 and the connecting rod oil passage 130 in the connecting rod 100 are not connected, the oil pressure decreases, and the one-way valve 400 returns to its natural closed state. The oil in the connecting rod oil passage 130 is blocked by the one-way valve 400 and will not flow back toward the first connecting hole 110, thereby reducing the pressure fluctuation caused by the downward inertial force of the oil and reducing the cavitation phenomenon near the first connecting hole 110. In addition, the components at the first connecting hole 110 can obtain more lubrication and sufficient cooling, reducing wear between components and improving the reliability and stability of the crankshaft-connecting rod mechanism. In addition, when the one-way valve 400 is not provided, due to the gap outside the crankshaft 200, the oil in the connecting rod oil passage 130 will gradually leak toward the first connecting hole 110 after shutdown. When the engine is started, the oil needs to gradually fill the connecting rod oil passage 130. The pressure building process is slow and there is a risk of wear. When the one-way valve 400 is provided, after the engine is shut down, it is blocked by the one-way valve 400, and there is oil in the connecting rod oil passage 130, which can accelerate the oil pressure building process when the engine is started, so that the second connecting hole 120 is quickly lubricated and cooled.

[0034] Furthermore, the connecting rod 100 is connected to the piston 300. A piston pin 600 is inserted into the second connecting hole 120, connecting the piston 300 to the connecting rod via the piston pin 600. Optionally, a bushing 700 is disposed in the first connecting hole 110 and fits over the piston pin 600. The bushing 700 provides protection, reducing wear, vibration, and noise on the connecting rod 100 and piston pin 600. When the crankshaft oil passage 210 and the connecting rod oil passage 130 are connected, oil can be transported from the first connecting hole 110 to the second connecting hole 120, thereby lubricating the piston pin 600.

[0035] Furthermore, the one-way valve 400 includes a one-way valve body 410, which is an elastic member capable of closing under its own elastic restoring force. Optionally, the one-way valve body 410 can be made of rubber, such as chloroprene rubber, nitrile rubber, or fluororubber. The one-way valve body 410 made of rubber can have good elasticity, oil resistance, and wear resistance, resulting in a long service life. Optionally, the one-way valve body 410 is shaped like a duckbill and is closed in its natural state, with the closable end positioned toward the second connecting hole 120. When oil is transported from the connecting rod oil passage 130 near the first connecting hole 110 to the second connecting hole 120, the one-way valve body 410 opens. When the crankshaft oil passage 210 and the connecting rod oil passage 130 are disconnected and the oil pressure decreases, the one-way valve body 410 automatically closes under its own restoring force.

[0036] Furthermore, the one-way valve 400 includes a base 420 having a connecting hole formed therein, which communicates with the connecting rod oil passage 130. A one-way valve body 410 is connected to the base 420. When the one-way valve body 410 is closed, the one-way valve body 410 can block the connecting hole, and the outer side of the base 420 is sealed against the wall of the connecting rod oil passage 130. Optionally, the base 420 can be made of cemented carbide, plastic, or stainless steel. In some embodiments, the one-way valve body 410 is connected to the end of the base 420 facing the second connecting hole 120, with the closable end of the one-way valve body 410 facing the second connecting hole 120. In other embodiments, the one-way valve body 410 is connected to the end of the base 420 facing the first connecting hole 110, with the closable end of the one-way valve body 410 located in the connecting hole and facing the second connecting hole 120.

[0037] Furthermore, the one-way valve body 410 includes a sleeve section that is sleeved onto the base 420. The outer side of the sleeve section is in sealing contact with the wall of the connecting rod oil passage 130. By sleeved on the base 420, the sleeve section can be compressed between the wall of the connecting rod oil passage 130 and the outer side of the base 420, making the overall structure more compact and improving the sealing performance. Of course, the end of the one-way valve body 410 connected to the base 420 can also be embedded in the base 420 or connected to the wall of the communication hole.

[0038] In some embodiments, the base 420 includes a first section and a second section that are interconnected. The outer diameter of the first section is smaller than that of the second section. The sleeve section is sleeved onto the first section, and the second section is sealed to the wall of the connecting rod oil passage 130. In other embodiments, the axial length of the sleeve section can be equal to the axial length of the base 420.

[0039] Optionally, the second section is provided with external threads, and the wall of the connecting rod oil passage 130 is provided with internal threads, and the second section and the wall of the connecting rod oil passage 130 are threadedly connected. The threaded connection method is convenient and has good sealing. Optionally, the base 420 and the connecting rod oil passage 130 can also adopt an interference fit, and the base 420 can be pressed into the connecting rod oil passage 130.

[0040] Furthermore, connecting rod oil passage 130 includes a first oil passage and a second oil passage that communicate with each other. The first oil passage communicates with first connecting hole 110, and the second oil passage communicates with second connecting hole 120. The inner diameter of the first oil passage is larger than that of the second oil passage, forming a stepped surface at the junction of the first and second oil passages. One-way valve 400 abuts against the stepped surface. It can be understood that the stepped surface serves to position one-way valve 400, effectively ensuring that one-way valve 400 is properly installed and preventing it from moving toward the second oil passage due to oil pressure.

[0041] Furthermore, a connecting rod bearing 500 is disposed within the first connecting hole 110. The connecting rod bearing 500 is sleeved onto the crankshaft 200 and is provided with an oil hole 510. The oil hole 510 communicates with the connecting rod oil passage 130, and the crankshaft oil passage 210 can also communicate with the oil hole 510. The edges of the oil hole 510 are rounded. The placement of the connecting rod bearing 500 within the first connecting hole 110 reduces friction and wear between the crankshaft 200 and the connecting rod 100. The chamfered edges of the oil hole 510 help reduce stress concentration, effectively minimizing cavitation.

[0042] This embodiment also provides an engine, comprising a piston 300, a piston pin 600, and the aforementioned crankshaft-connecting rod mechanism. The piston pin 600 is inserted into the second connecting hole 120, and the piston 300 is connected to the connecting rod 100 via the piston pin 600. The engine also includes a cylinder block, in which the piston 300 is disposed and capable of reciprocating movement. Because the engine utilizes the aforementioned crankshaft-connecting rod mechanism, it can effectively prevent oil backflow, allowing components at the lubrication end, such as the piston pin 600 and piston 300, to be better lubricated and cooled. At the same time, pressure fluctuations caused by the inertial force of the oil are reduced, thereby reducing the occurrence of cavitation and enhancing engine operation stability. In addition, the pressure buildup process during engine startup is rapid, allowing the lubrication end components to be quickly lubricated and cooled.

[0043] This embodiment also provides a vehicle comprising the above engine. Due to the use of the above engine, the vehicle has good power and stability.

[0044] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A crankshaft connecting rod mechanism, characterized in that: include: A connecting rod (100), wherein the connecting rod (100) is provided with a first connecting hole (110), a second connecting hole (120) and a connecting rod oil passage (130), wherein the first connecting hole (110) and the second connecting hole (120) are respectively located at two ends of the connecting rod (100) and are connected through the connecting rod oil passage (130); A crankshaft (200), the crankshaft (200) being passed through the first connecting hole (110), a crankshaft oil passage (210) being provided in the crankshaft (200), and the crankshaft oil passage (210) being capable of communicating with the connecting rod oil passage (130); A one-way valve (400) is provided in the connecting rod oil passage (130) and is located at one end where the connecting rod oil passage (130) and the first connecting hole (110) are connected. When the crankshaft oil passage (210) and the connecting rod oil passage (130) are connected, the one-way valve (400) can be opened under the action of oil pressure.

2. The crankshaft-connecting rod mechanism according to claim 1, characterized in that: The one-way valve (400) comprises a one-way valve body (410), which is an elastic member and can be closed under the action of its own elastic restoring force.

3. The crankshaft-connecting rod mechanism according to claim 2, characterized in that: The one-way valve (400) includes a base (420), a connecting hole is provided on the base (420), the connecting hole is connected to the connecting rod oil passage (130), the one-way valve body (410) is connected to the base (420), and when the one-way valve body (410) is closed, the one-way valve body (410) can block the connecting hole, and the outer side of the base (420) is sealed with the wall of the connecting rod oil passage (130).

4. The crankshaft-connecting rod mechanism according to claim 3, characterized in that: The one-way valve body (410) comprises a sleeve section, which is sleeved on the base (420), and the outer side of the sleeve section is in sealing contact with the wall surface of the connecting rod oil passage (130).

5. The crankshaft-connecting rod mechanism according to claim 4, characterized in that: The base (420) comprises a first section and a second section connected to each other, the outer diameter of the first section is smaller than the outer diameter of the second section, the sleeve section is sleeved on the first section, and the second section is sealed and connected to the wall of the connecting rod oil passage (130).

6. The crankshaft-connecting rod mechanism according to claim 5, characterized in that: The second section is provided with an external thread, the wall surface of the connecting rod oil passage (130) is provided with an internal thread, and the second section and the wall surface of the connecting rod oil passage (130) are threadedly connected.

7. The crankshaft-connecting rod mechanism according to any one of claims 1 to 6, characterized in that: The connecting rod oil passage (130) includes a first oil passage and a second oil passage that are connected to each other, wherein the first oil passage is connected to the first connecting hole (110), and the second oil passage is connected to the second connecting hole (120). The inner diameter of the first oil passage is larger than the inner diameter of the second oil passage, so as to form a stepped surface at the junction of the first oil passage and the second oil passage, and the one-way valve (400) abuts against the stepped surface.

8. The crankshaft-connecting rod mechanism according to any one of claims 1 to 6, characterized in that: A connecting rod bearing (500) is provided in the first connecting hole (110), and the connecting rod bearing (500) is sleeved on the crankshaft (200). An oil hole (510) is provided on the connecting rod bearing (500), and the oil hole (510) is connected to the connecting rod oil passage (130). The crankshaft oil passage (210) can be connected to the oil hole (510), and the orifice edge of the oil hole (510) is rounded.

9. An engine, characterized in that: The invention comprises a piston (300), a piston pin (600) and a crankshaft connecting rod mechanism according to any one of claims 1 to 8, wherein the piston pin (600) is passed through the second connecting hole (120), and the piston (300) is connected to the connecting rod (100) through the piston pin (600).

10. A vehicle, characterized in that: Comprising the engine of claim 9.

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