Crankshaft

Abstract

A main body of the crankshaft comprises a connecting rod journal, a power end, a balancing weight and a main journal. The connecting rod journal is arranged at the round edge position of the large shaft body provided with the power end and the round edge position of the large shaft body of the main journal, one end is connected with the large shaft body of the power end, the other end is connected with the large shaft body of the main journal, and the distance between the connecting rod journal and the circle center of the large shaft body is not larger than the radius of the large shaft body; the connecting rod journal is directly connected with the main journal and the power end to form a lever structure; and the counterweight is arranged on the connecting rod journal opposite to the axis on the large shaft body. The connecting rod journal is directly connected with the large shaft body of the main journal and the large shaft body of the power end, a crank arm is abandoned, inertia force and centrifugal force generated when the crankshaft rotates are greatly reduced, vibration is reduced, and operation stability is improved.

Description

Technical Field

[0001] This invention belongs to the field of transmission, specifically relating to crankshafts. Background Technology

[0002] The crankshaft is a core component in many machines that enables power conversion. Its complex structure consists of several key parts: Main journals: supporting the crankshaft and bearing the main loads, typically located at both ends and mounted on the engine block via main bearings. Connecting rod journals (crank pins): connected to the connecting rods, converting the reciprocating motion of the piston into rotational motion. Crank arms: connecting the main journals and connecting rod journals, forming the basic framework of the crankshaft. Counterweights: used to balance the inertial and centrifugal forces generated during crankshaft rotation, reducing vibration and improving operational smoothness.

[0003] Front and rear ends: The front end usually has drive accessories such as pulleys and timing gears; the rear end connects to the flywheel and outputs power to the transmission system. The crank arm is mostly set outside the round edge of the main journal. Although counterweights are used to reduce inertial and centrifugal forces and vibration, there are still different structural methods and room for improvement. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a crankshaft with a simple structure, wide application, and the ability to reduce inertial force and centrifugal force during rotation.

[0005] The technical solution adopted by the present invention to solve its technical problem is to provide a crankshaft.

[0006] The technical solution of this invention is as follows: The main body includes a connecting rod journal, a power end, a counterweight, and a main journal. The connecting rod journal is located at the edge of the main shaft where the power end is located and at the edge of the main shaft of the main journal. One end is connected to the main shaft of the power end, and the other end is connected to the main shaft of the main journal. The distance between the connecting rod journal and the center of the main shaft is not greater than the radius of the main shaft. The connecting rod journal is directly connected to the main journal and the power end, forming a lever structure. The counterweight is located on the connecting rod journal opposite the axis of the main shaft.

[0007] The beneficial effects of this invention are that the connecting rod journal is directly connected to the main shaft and the power end shaft to form a lever structure, eliminating the need for a crank arm, greatly reducing the inertial force and centrifugal force generated when the crankshaft rotates, reducing vibration, and improving running stability. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of Embodiment 2 of the present invention. Detailed Implementation

[0009] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the invention. Example 1

[0010] A crankshaft, mainly comprising a power output connecting rod journal, a power input end, a counterweight, and a main journal. The power output connecting rod journal is positioned at the circular edge of the main shaft body where the power input end is located and at the circular edge of the main shaft body of the main journal. One end is connected to the main shaft body of the power input end, and the other end is connected to the main shaft body of the main journal. The distance between the connecting rod journal and the center of the main shaft body is not greater than the radius of the main shaft body and not greater than the radius of the main shaft body of the power input end. The connecting rod journal is directly connected to the main journal and the power input end, forming a lever structure. Two counterweights are provided, respectively positioned on opposite sides of the axis of the main shaft body of the power input end and the main shaft body of the main journal.

[0011] The power input end is provided with a splined shaft, a bearing mounting shaft, and a large shaft in sequence. The diameter of the large shaft is larger than the diameter of the bearing mounting shaft, which is larger than the diameter of the splined shaft.

[0012] The main journal is provided with a large shaft body and a bearing mounting shaft body, the diameter of the large shaft body being larger than the diameter of the bearing mounting shaft body. Example 2

[0013] A crankshaft, the main body of which includes a power input spline shaft, a primary crankshaft, an intermediate shaft, a secondary crankshaft, and a rear crankshaft.

[0014] The power input spline shaft is provided with a spline shaft, a bearing mounting shaft, and a large shaft in sequence. The diameter of the large shaft is larger than the diameter of the bearing mounting shaft, which is also larger than the diameter of the spline shaft.

[0015] The primary journal is connected at one end to the main shaft of the power input splined shaft and at the other end to the intermediate shaft. The vertical distance between the primary journal and the center of the main shaft is no greater than the radius of the main shaft. The primary journal is directly connected to the intermediate shaft and the power input splined shaft, forming a lever structure. The intermediate shaft is connected at one end to a primary crank and at the other end to a secondary crank. The secondary journal is connected at one end to the rear main shaft and at the other end to the intermediate shaft. The vertical distance between the secondary journal and the center of the rear main shaft is no greater than the radius of the rear main shaft. The secondary journal is directly connected to the intermediate shaft and the rear shaft, forming a lever structure.

[0016] The primary and secondary bevels are perpendicular to each other on the intermediate axis.

[0017] The counterweights are provided in four parts, which are respectively set on the journal opposite the axis of the main shaft of the power input spline shaft, the intermediate shaft and the rear shaft, with two counterweights provided on the intermediate shaft.

[0018] The rear shaft is provided with a large shaft body and a bearing mounting shaft body, the diameter of the large shaft body being larger than the diameter of the bearing mounting shaft body. Example 3

[0019] A crankshaft, mainly comprising a power input connecting rod journal, a power output end, a counterweight, and a main journal. The power input connecting rod journal is located at the position of the main shaft of the power output end and at the edge of the main shaft of the main journal. One end is connected to the main shaft of the power output end, and the other end is connected to the main shaft of the main journal. The vertical distance between the power input connecting rod journal and the center of the main shaft of the main journal is not greater than the radius of the main shaft. The power input connecting rod journal is directly connected to the main journal and the power output end, forming a lever structure. Two counterweights are provided, respectively located opposite the center of the main shaft of the main journal and the main shaft of the power output end.

[0020] The main journal is provided with a large shaft body and a bearing mounting shaft body in sequence, and the diameter of the large shaft body is larger than the diameter of the bearing mounting shaft body.

[0021] The power output end is provided with a large shaft, a mounting shaft, and a power output gear in sequence; the diameter of the large shaft is larger than the diameter of the mounting shaft, which is larger than the diameter of the power output gear.

[0022] The front end shaft is provided with a large shaft body and a bearing mounting shaft body, the diameter of the large shaft body being larger than the diameter of the bearing mounting shaft body.

[0023] In the above embodiments, the connecting rod journal is directly connected to the main journal and the power end, forming a lever structure. By eliminating the crank arm, the inertial and centrifugal forces generated during crankshaft rotation are greatly reduced, vibration is decreased, and operational smoothness is improved.

[0024] The above are merely preferred embodiments for illustrative purposes. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention shall fall within the protection scope of this invention.

Claims

1. Claims, a crankshaft, characterized in that, The main body includes a connecting rod journal, a power end, a counterweight, and a main journal. The connecting rod journal is located at the edge of the main shaft where the power end is located and at the edge of the main shaft where the main journal is located. One end of the connecting rod journal is connected to the main shaft of the power end, and the other end is connected to the main shaft of the main journal. The distance between the connecting rod journal and the center of the main shaft is not greater than the radius of the main shaft. The connecting rod journal is directly connected to the main journal and the power end to form a lever structure. The counterweight is located on the connecting rod journal opposite the axis of the main shaft.

2. According to claim 1, a crankshaft, characterized in that, The main body includes a power input spline shaft, a first-stage crankshaft, an intermediate shaft, a second-stage crankshaft, and a rear-end shaft; the power input spline shaft is sequentially provided with a spline shaft and a large shaft body, the diameter of the large shaft body being larger than the diameter of the spline shaft, wherein the part of the power input spline shaft near the large shaft body is used to install bearings; The first-stage journal is located at the circular edge of the main shaft of the power input spline shaft and the circular edge of the intermediate shaft. One end is connected to the main shaft of the power input spline shaft, and the other end is connected to the intermediate shaft. The distance between the journal and the center of the main shaft is not greater than the radius of the intermediate shaft and the radius of the main shaft of the power input spline shaft. The first-stage journal is directly connected to the intermediate shaft and the power input spline shaft, forming a lever structure. The circular edge of the intermediate shaft is connected to the first-stage crank neck at one end and the circular edge of the second-stage crank neck at the other end. The second-stage journal is located at the circular edge of the main shaft of the rear shaft and the circular edge of the intermediate shaft. One end is connected to the main shaft of the rear shaft, and the other end is connected to the intermediate shaft. The distance between the journal and the center of the main shaft is not greater than the radius of the intermediate shaft and the radius of the main shaft of the rear shaft. The first-stage journal is directly connected to the intermediate shaft and the rear shaft, forming a lever structure. The primary and secondary cranks are perpendicular to each other on the intermediate axis; The aforementioned counterweights are provided in two parts, respectively located on the opposite side of the shaft center on the main shaft of the power input spline shaft and the main shaft of the rear shaft; The rear shaft is provided with a large shaft body and a bearing mounting shaft body, the diameter of the large shaft body being larger than the diameter of the bearing mounting shaft body.

3. According to claim 1, a crankshaft, characterized in that, The main body includes a power output connecting rod journal, a power input end, a counterweight, and a main journal. The power output connecting rod journal is located at the circular edge of the main shaft where the power input end is located and at the circular edge of the main shaft of the main journal. One end is connected to the main shaft of the power input end, and the other end is connected to the main shaft of the main journal. The vertical distance between the power output connecting rod journal and the center of the main shaft is not greater than the radius of the main shaft. The power output connecting rod journal is directly connected to the main journal and the power end to form a lever structure. Two counterweights are provided, respectively located on the opposite side of the axis of the main shaft of the power output connecting rod journal at the power input end and the main shaft of the main journal. The power input end is provided with a splined shaft, a bearing mounting shaft, and a large shaft in sequence. The diameter of the large shaft is larger than the diameter of the bearing mounting shaft, which is larger than the diameter of the splined shaft. The main journal is provided with a large shaft body and a bearing mounting shaft body, the diameter of the large shaft body being larger than the diameter of the bearing mounting shaft body.

4. According to claim 1, a crankshaft, characterized in that, The main body includes a power input connecting rod journal, a power output end, a counterweight, and a main journal. The power input connecting rod journal is located at the edge of the large shaft where the power output end is located and at the edge of the small shaft of the main journal. One end is connected to the small shaft of the power output end, and the other end is connected to the large shaft of the main journal. The distance between the power input connecting rod journal and the center of the large shaft is not greater than the radius of the large shaft and the radius of the small shaft. The power input connecting rod journal is directly connected to the main journal and the power output end to form a lever structure. Two counterweights are provided, respectively located on opposite sides of the axis of the connecting rod journal on the large shaft and the small shaft. The main journal is provided with a large shaft body and a bearing mounting shaft body in sequence, and the diameter of the large shaft body is larger than the diameter of the mounting shaft body; The power output end is provided with a small shaft, a large shaft, a mounting shaft, and a power output gear in sequence; the diameter of the small shaft is smaller than the diameter of the large shaft; the diameter of the large shaft is larger than the diameter of the mounting shaft, which is larger than the diameter of the power output gear; The front end shaft is provided with a large shaft body and a bearing mounting shaft body, the diameter of the large shaft body being larger than the diameter of the bearing mounting shaft body.

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