Anti-fatigue-fracture engine connecting rod bearing bush

Abstract

The utility model discloses an anti-fatigue-fracture engine connecting rod bearing bush which comprises two bearing bush bodies arranged in a semicircular mode and further comprises two shaft seats arranged on the sides, close to a connecting rod big-end hole, of the two bearing bush bodies, and the two shaft seats are arranged in a semicircular mode and fixedly connected with the connecting rod big-end hole. And rotating assemblies for rotating the bearing bush body are arranged on the two shaft seats. Through the arrangement of the shaft seat, the contact between the bearing bush body and the crankshaft is dynamic and uniform, the uniform stress distribution is favorable for reducing stress concentration, so that the risk of fatigue fracture is reduced, and meanwhile, under the flexible supporting action of the supporting assembly and the rubber plate, the bearing bush body is prevented from being damaged. Therefore, the bearing bush body adapts to tiny deformation or vibration of the crankshaft to a certain extent, the stress change of the bearing bush body caused by irregular movement of the crankshaft is reduced due to the adaptability, and the anti-fatigue performance of the bearing bush body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine parts, and particularly relates to an engine connecting rod bearing shell resistant to fatigue fracture. Background Technique

[0002] By installing the connecting rod bearing shell at the connecting part of the connecting rod and the crankshaft, it is used to reduce the wear between the crankshaft and the connecting rod, and plays the roles of wear resistance, connection, support and transmission.

[0003] In use, the connecting rod bearing shell is usually fixedly installed in the hole of the big end of the connecting rod. Although it can maintain stable support and positioning for the crankshaft, however, it cannot well adapt to the slight deformation or vibration generated by the crankshaft during operation. This non - adaptability will lead to uneven stress on the bearing shell, increasing the risk of fatigue fracture. At the same time, it makes the lubricating oil difficult to be evenly and effectively distributed on the friction surface, thereby accelerating the wear and fatigue of the bearing shell.

[0004] Therefore, there is an urgent need for an engine connecting rod bearing shell resistant to fatigue fracture to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an engine connecting rod bearing shell resistant to fatigue fracture to solve the problems of many deficiencies in the use of the connecting rod bearing shell fixedly installed in the hole of the big end of the connecting rod as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an engine connecting rod bearing shell resistant to fatigue fracture, including two semi - circular bearing shell bodies, and further including a bearing seat arranged on one side of the two bearing shell bodies close to the hole of the big end of the connecting rod. The two bearing seats are semi - circularly arranged and fixedly connected to the hole of the big end of the connecting rod. A rotating assembly for rotating the bearing shell body is arranged on the two bearing seats.

[0007] Two lubricating holes are opened on the two bearing seats.

[0008] The rotating assembly includes an arc - shaped dovetail groove opened on one side of the bearing seat close to the bearing shell body. An arc - shaped dovetail bar is slidably connected to the arc - shaped dovetail groove, and one end of the arc - shaped dovetail bar is connected to the bearing shell body through a rubber plate.

[0009] A supporting assembly for connecting and supporting with the bearing seat is arranged on the two bearing shell bodies. The supporting assembly includes a supporting tube fixedly connected to one side of the bearing shell body close to the bearing seat. A supporting rod is connected in the supporting tube through an extrusion assembly. One end of the supporting rod close to the bearing seat is rotatably connected with a rotating ball.

[0010] The extrusion assembly includes an extrusion plate slidably connected inside the support tube. The other end of the support rod is connected to the extrusion plate. On the other side of the extrusion plate, an extrusion spring is fixedly connected, and the other end of the extrusion spring is connected to the bottom wall of the support tube.

[0011] A plurality of the support assemblies are provided, and each of the support assemblies is arranged in an equiangular ring.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] Through the setting of the shaft seat, under the action of the support assembly, while ensuring the stable support and positioning of the crankshaft, under the action of the rotating assembly, the contact between the bearing shell body and the crankshaft is dynamic and uniform. This uniform force distribution helps to reduce stress concentration, thereby reducing the risk of fatigue fracture. At the same time, under the flexible support of the support assembly and the rubber plate, the bearing shell body can adapt to the minor deformation or vibration of the crankshaft to a certain extent. This adaptability reduces the stress change of the bearing shell body caused by the irregular movement of the crankshaft, thereby improving its anti-fatigue performance. And under the uniform smearing action of the rotating ball on the lubricating oil, an effective lubricating film is formed, thereby improving the lubrication performance between the rotating ball and the shaft seat, reducing friction and wear, and further slowing down the wear and fatigue of the bearing shell body. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a schematic diagram of the dovetail bar structure of the present utility model;

[0016] Figure 3 is a schematic diagram of the rotating assembly structure of the present utility model;

[0017] Figure 4 is a schematic diagram of the internal structure of the support assembly of the present utility model;

[0018] Figure 5 is Figure 4 the enlarged view at A in

[0019] In the figure: 1, bearing shell body; 2, shaft seat; 3, lubricating hole; 401, arc dovetail groove; 402, arc dovetail bar; 403, rubber plate; 501, support tube; 502, support rod; 503, rotating ball; 601, extrusion plate; 602, extrusion spring. Detailed Embodiment

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

[0021] Embodiment 1

[0022] Please refer to Figures 1-5 , an anti-fatigue fracture engine connecting rod bearing shell shown in the figure, including two bearing shell bodies 1 arranged in a semicircular shape, and further including bearing seats 2 arranged on one side of the two bearing shell bodies 1 close to the big end hole of the connecting rod. The two bearing seats 2 are arranged in a semicircular shape and are fixedly connected to the big end hole of the connecting rod. A rotating assembly for rotating the bearing shell body 1 is provided on the two bearing seats 2;

[0023] It should be noted here that: through the setting of the bearing seat 2, under the action of the support assembly, while ensuring the stable support and positioning of the crankshaft, under the action of the rotating assembly, the contact between the bearing shell body 1 and the crankshaft is dynamic and uniform. This uniform force distribution helps to reduce stress concentration, thereby reducing the risk of fatigue fracture. At the same time, under the flexible support of the support assembly and the rubber plate 403, the bearing shell body 1 can adapt to the minor deformation or vibration of the crankshaft to a certain extent. This adaptability reduces the stress change of the bearing shell body 1 caused by the irregular movement of the crankshaft, thereby improving its anti-fatigue performance. And under the uniform smearing action of the rotating ball 503 on the lubricating oil, an effective lubricating film is formed, thereby improving the lubrication performance between the rotating ball 503 and the bearing seat 2, reducing friction and wear, and further slowing down the wear and fatigue of the bearing shell body 1.

[0024] Please refer to Figure 3 , two lubricating holes 3 are opened on the two bearing seats 2 shown in the figure;

[0025] It should be noted here that: through the setting of the lubricating holes 3, it is convenient for the lubricating oil to penetrate.

[0026] Please refer to Figures 2-4 , the rotating assembly shown in the figure includes an arc-shaped dovetail groove 401 opened on the side of the bearing seat 2 close to the bearing shell body 1. An arc-shaped dovetail bar 402 is slidably connected to the arc-shaped dovetail groove 401. One end of the arc-shaped dovetail bar 402 is connected to the bearing shell body 1 through a rubber plate 403;

[0027] It should be noted here that: through the setting of the rotating assembly, during the rotation of the crankshaft, the bearing shell body 1 is driven to rotate, so that the contact between the bearing shell body 1 and the crankshaft is dynamic and uniform. This uniform force distribution helps to reduce stress concentration, thereby reducing the risk of fatigue fracture.

[0028] Working principle: When the connecting rod bearing shell is in use, first, under the guiding and limiting action of the rotating assembly, the bearing shell body 1 is installed on the bearing seat 2, and then the bearing seat 2 is installed in the large hole of the connecting rod. Under the action of the supporting assembly, the supporting connection strength between the bearing shell body 1 and the bearing seat 2 is ensured, and further, the stable support and positioning of the crankshaft are maintained;

[0029] After the bearing seat 2 is installed in the large hole of the connecting rod, the crankshaft is connected to the connecting rod. During the operation of the engine, power is transmitted to the crankshaft through a series of mechanisms such as gears, chains or belts, causing it to start rotating. During the rotation of the crankshaft, under the action of the rotating assembly, the bearing shell body 1 is driven to rotate, so that the contact between the bearing shell body 1 and the crankshaft is dynamic and uniform. This uniform force distribution helps to reduce stress concentration, thereby reducing the risk of fatigue fracture. At the same time, under the flexible support of the supporting assembly and the rubber plate 403, the bearing shell body 1 can adapt to the minor deformation or vibration of the crankshaft to a certain extent. This adaptability reduces the stress change of the bearing shell body 1 caused by the irregular movement of the crankshaft, thereby improving its fatigue resistance. And under the uniform smearing action of the rotating ball 503 on the lubricating oil, an effective lubricating film is formed, thereby improving the lubrication performance between the rotating ball 503 and the bearing seat 2, reducing friction and wear, and further slowing down the wear and fatigue of the bearing shell body 1.

[0030] Embodiment 2

[0031] Please refer to Figure 4 and Figure 5 This embodiment further illustrates Embodiment 1. The two bearing shell bodies 1 in the figure are provided with a supporting assembly for connecting and supporting with the bearing seat 2. The supporting assembly includes a supporting tube 501 fixedly connected to one side of the bearing shell body 1 close to the bearing seat 2. A supporting rod 502 is connected in the supporting tube 501 through an extrusion assembly. One end of the supporting rod 502 close to the bearing seat 2 is rotatably connected with a rotating ball 503;

[0032] It should be noted here that: through the setting of the supporting assembly, under the extrusion action of the extrusion assembly, the rotating ball 503 abuts against the inner wall of the bearing seat 2, thereby improving the supporting connection strength between the bearing shell body 1 and the bearing seat 2. At the same time, during the rotation of the crankshaft, under the action of the rotating assembly, the bearing shell body 1 is driven to rotate synchronously, further driving the rotating ball 503 to rotate on the inner wall of the bearing seat 2. During the rotation of the rotating ball 503, the lubricating oil infiltrated from the lubricating hole 3 is evenly smeared on the inner wall of the bearing seat 2, thereby forming an effective lubricating film, improving the lubrication performance between the rotating ball 503 and the bearing seat 2, reducing friction and wear, and further slowing down the wear and fatigue of the bearing shell body 1.

[0033] Please refer to Figure 4and Figure 5 , in the illustrated figure, the extrusion assembly includes an extrusion plate 601 slidably connected inside the support tube 501. The other end of the support rod 502 is connected to the extrusion plate 601. On the other side of the extrusion plate 601, an extrusion spring 602 is fixedly connected, and the other end of the extrusion spring 602 is connected to the bottom wall of the support tube 501;

[0034] It should be noted here that: through the setting of the extrusion assembly, by using the elastic force of the extrusion spring 602, the rotating ball 503 is pushed to always abut against the inner wall of the shaft seat 2, thereby improving the support connection stability between the bearing bush body 1 and the shaft seat 2.

[0035] Please refer to Figure 4 and Figure 5 , multiple support assemblies are provided in the illustrated figure, and each support assembly is arranged in an equiangular ring;

[0036] It should be noted here that: through the multiple support assemblies arranged in an equiangular ring, the connection support strength between the bearing bush body 1 and the shaft seat 2 is improved.

[0037] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An engine connecting rod bearing bushing resistant to fatigue fracture, comprising: Two bearing shell bodies (1) arranged in a semicircular shape; It is characterized by further comprising: Axle seats (2) are arranged on one side of the two bearing shell bodies (1) close to the connecting rod big end hole. The two axle seats (2) are arranged in a semicircular shape and are fixedly connected to the connecting rod big end hole. The two axle seats (2) are provided with a rotating assembly for rotating the bearing shell bodies (1).

2. The fatigue-fracture-resistant engine connecting rod bearing according to claim 1, characterized in that: Two lubrication holes (3) are provided on the two shaft seats (2).

3. The fatigue-fracture resistant engine connecting rod bearing according to claim 1, characterized in that: The rotating assembly comprises an arc-shaped dovetail groove (401) formed on a side of the shaft seat (2) close to the bearing body (1), an arc-shaped dovetail strip (402) being slidably connected to the arc-shaped dovetail groove (401), and one end of the arc-shaped dovetail strip (402) being connected to the bearing body (1) via a rubber plate (403).

4. The fatigue-fracture resistant engine connecting rod bearing according to claim 1, characterized in that: The two bearing bodies (1) are provided with a support assembly for connecting and supporting the shaft seat (2), and the support assembly comprises a support tube (501) fixedly connected to the side of the bearing body (1) close to the shaft seat (2), a support rod (502) is connected to the support tube (501) via an extrusion assembly, and a rotating ball (503) is rotatably connected to one end of the support rod (502) close to the shaft seat (2).

5. The fatigue-fracture resistant engine connecting rod bearing according to claim 4, characterized in that: The extrusion assembly comprises an extrusion plate (601) slidably connected to the support tube (501), the other end of the support rod (502) is connected to the extrusion plate (601), the other side of the extrusion plate (601) is fixedly connected to an extrusion spring (602), and the other end of the extrusion spring (602) is connected to the bottom wall of the support tube (501).

6. The fatigue-fracture resistant engine connecting rod bearing according to claim 4, characterized in that: There are multiple support components, and each of the support components is arranged in an equiangular ring.

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