High-performance crankshaft mechanism

Abstract

The utility model discloses a high-performance crankshaft mechanism, which relates to the technical field of crankshafts, and comprises a main journal, cranks, a coupling journal and an outer sleeve, balls are arranged between the coupling journal and the outer sleeve, hidden grooves are formed in the inner sides of the cranks, the two ends of the outer sleeve are positioned in the hidden grooves, conical graphite rings are arranged on the inner sides of the hidden grooves, and the graphite rings are arranged on the outer sleeve. A compression spring and a limiting assembly are connected between the outer sleeve and the graphite ring, and a friction part is arranged on the inner side of the hidden groove. The conical graphite ring is arranged, during initial friction, the friction surface between the graphite ring and the friction part is small, and the friction force between the conical graphite ring and the friction part is large through the compression spring; and the friction surface is larger and the friction force is smaller in the backward direction, so that it is guaranteed that the difference of the grinding amount in the front and back unit time is small, powder generated by abrasion of the graphite ring is scattered into the outer sleeve and the connecting shaft neck, and the stable self-lubricating effect on rotation of the balls is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshafts, and particularly relates to a high-performance crankshaft mechanism. Background Technique

[0002] The crankshaft is the most important component in the engine. It bears the force transmitted by the connecting rod, converts it into torque and outputs it through the crankshaft to drive other accessories on the engine. The crankshaft is jointly affected by the centrifugal force of the rotating mass, the periodically changing gas inertia force and the reciprocating inertia force, so that the crankshaft bears the action of bending and torsional loads. Therefore, the crankshaft is required to have sufficient strength and stiffness.

[0003] To ensure the use effect, it is necessary to regularly add lubricating oil, which is inconvenient to use. To improve the above problems, after retrieval, for example, a self-lubricating telescopic connecting rod crankshaft mechanism provided by the patent publication number CN218625283U includes a main journal. Both ends of the main journal are symmetrically provided with cranks. A coupling journal is detachably installed between the two groups of cranks. Outer sleeves are sleeved on the outer sides of the coupling journals. By the fit between the graphite ring and the hidden groove, and when the outer sleeve rotates relative to the coupling journal, the rotation of the graphite ring can be driven to rub the graphite ring. Then, in cooperation with the guiding mechanism composed of the frustum block and the through hole, the graphite powder can be conveyed into the outer sleeve and the inside of the coupling journal to lubricate the ball bearings automatically, without the need to frequently add lubricating oil during use, improving the practicability of the device. In addition, by the solid setting of the main journal and the coupling journal inside, the rigidity of the device is improved.

[0004] Based on the above retrieval, combined with the prior art, it is found that in the prior art, during the use of the graphite ring and the spring arranged in the crankshaft mechanism similar to the above disclosure, as the graphite ring is consumed, its overall length becomes shorter, the pressure of the spring on the graphite ring becomes smaller, and the powder grinding efficiency per unit time is relatively low, resulting in poor lubrication effect in the later stage. Therefore, a high-performance crankshaft mechanism is proposed to improve the above problems. Content of the Utility Model

[0005] The purpose of this application is to provide a high-performance crankshaft mechanism to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, this application provides the following technical solution: A high-performance crankshaft mechanism includes a main journal. Cranks are symmetrically installed at both ends of the main journal. A coupling journal is detachably installed between the two groups of cranks. Outer sleeves are sleeved on the outer sides of the coupling journals. Ball bearings are arranged between the coupling journal and the outer sleeve. Hidden grooves are opened on the inner sides of the cranks. Both ends of the outer sleeve are located inside the hidden grooves. A graphite ring is arranged inside the hidden grooves. A compression spring and a limiting component are connected between the outer sleeve and the graphite ring;

[0007] The inner side of the hidden groove is provided with a friction part that contacts the end part of the graphite ring away from the outer sleeve. The graphite ring is conical, and the diameter of the end of the graphite ring close to the friction part is smaller than that of the end away from the friction part.

[0008] As a further supplement to this solution, the limiting component includes a limiting ring and a limiting rod. The limiting ring is detachably installed at the end of the graphite ring. A plurality of limiting rods are all parallel to the axis of the outer sleeve and are fixedly arranged in a circular array on the end face of the limiting ring away from the graphite ring. The side end of the outer sleeve is provided with a limiting hole that is slidably adapted to the limiting rod.

[0009] As a further supplement to this solution, an installation ring is fixed at the end of the graphite ring away from the friction part. A plurality of positioning columns are fixed on the end face of the installation ring away from the graphite ring. The limiting ring is provided with positioning holes that are adapted to the positioning columns.

[0010] As a further supplement to this solution, the friction part is a plurality of friction blocks evenly distributed in a ring shape on the inner wall of the hidden groove.

[0011] As a further supplement to this solution, the friction blocks are rotatably installed on the inner wall of the hidden groove. The friction blocks are cylindrical, and the arc surface of the friction blocks contacts the graphite ring.

[0012] As a further supplement to this solution, the length of the friction blocks is not less than the radial thickness of the graphite ring.

[0013] In summary, the technical effects and advantages of the present utility model are as follows:

[0014] 1. In the present utility model, by providing a conical graphite ring, during the initial friction, the friction surface between the graphite ring and the friction part is small, and the compression spring makes the friction force between the conical graphite ring and the friction part large; as time goes on, the friction surface becomes larger and the friction force becomes smaller, so as to ensure that the amount of ground powder in the front and back per unit time is relatively small. The powder generated by the wear of the graphite ring falls into the interior of the outer sleeve and the coupling neck, playing a stable self-lubricating role in the rotation of the ball.

[0015] 2. In the present utility model, by providing a plurality of friction blocks to replace the inner wall surface of the hidden groove, the length of the friction blocks is not less than the radial thickness of the graphite ring. Compared with surface friction, the friction effect between the friction blocks and the graphite ring can reduce the amount of ground powder per unit time and avoid excessive consumption of the graphite ring. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall planar structure in this embodiment;

[0018] Figure 2 It is a schematic diagram of the partial planar structure at the outer sleeve and the crank in this embodiment;

[0019] Figure 3 It is a schematic diagram of the disassembled three-dimensional structure at the outer sleeve and the crank in this embodiment;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure at the graphite ring and the friction part in this embodiment.

[0021] In the figure: 1, main journal; 2, crank; 3, outer sleeve; 301, limit hole; 4, connecting rod; 5, graphite ring; 6, compression spring; 7, friction part; 7, friction block; 8, limit ring; 801, positioning hole; 9, mounting ring; 10, positioning post; 11, limit rod; 12, connecting journal. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment: Refer to Figures 1-4 A high-performance crankshaft mechanism shown, including a main journal 1, cranks 2 are symmetrically installed at both ends of the main journal 1, a connecting journal 12 is detachably installed between the two groups of cranks 2, an outer sleeve 3 is sleeved outside the connecting journal 12, a ball is arranged between the connecting journal 12 and the outer sleeve 3, hidden grooves are opened on the inner sides of the cranks 2, both ends of the outer sleeve 3 are located inside the hidden grooves, a graphite ring 5 is arranged inside the hidden grooves, and a compression spring 6 and a limiting component are connected between the outer sleeve 3 and the graphite ring 5.

[0024] Specifically, the limiting component includes a limit ring 8 and a limit rod 11. The limit ring 8 is detachably installed at the end of the graphite ring 5. A plurality of limit rods 11 are all parallel to the axis of the outer sleeve 3 and are fixedly arranged in an annular array on the end face of the limit ring 8 away from the graphite ring 5. A limit hole 301 slidably adapted to the limit rod 11 is arranged on the side end of the outer sleeve 3. The cooperation of the limit rod 11 and the limit ring 8 enables the graphite ring 5 to rotate stably along with the outer sleeve 3.

[0025] To facilitate the replacement of the graphite ring 5, an installation ring 9 is fixed to the end of the graphite ring 5 away from the friction part 7. A plurality of positioning columns 10 are fixed to the end face of the installation ring 9 away from the graphite ring 5. Positioning holes 801 adapted to the positioning columns 10 are provided on the limiting ring 8.

[0026] Among them, a friction part 7 in contact with the end of the graphite ring 5 on the side away from the outer sleeve 3 is provided on the inner side of the hidden groove. The graphite ring 5 is conical, and the diameter of the end of the graphite ring 5 close to the friction part 7 is smaller than that of the end away from the friction part 7. The setting of the conical graphite ring 5 can ensure a stable powder output rate when it rotates relative to the friction part 7. That is, at the initial friction, the friction surface between the conical graphite ring 5 and the friction part 7 is small, and the compression spring 6 makes the friction force between the conical graphite ring 5 and the friction part 7 large; as it progresses, the friction surface becomes larger and the friction force becomes smaller, so as to ensure that the difference in the amount of ground powder per unit time before and after is small, thus ensuring the stability of the lubrication effect.

[0027] Among them, the friction part 7 is a plurality of friction blocks 71 evenly distributed in a ring shape on the inner wall of the hidden groove. The length of the friction blocks 71 is not less than the radial thickness of the graphite ring 5. Compared with surface friction, the friction between the friction blocks 71 and the graphite ring 5 can reduce the amount of ground powder per unit time and prevent the graphite ring 5 from being consumed too quickly.

[0028] To further reduce the friction between the friction blocks 71 and the graphite ring 5, the friction blocks 71 are rotatably installed on the inner wall of the hidden groove. The friction blocks 71 are cylindrical, and the arc surface of the friction blocks 71 is in contact with the graphite ring 5.

[0029] The working principle of the present utility model: At the initial friction, the friction surface between the conical graphite ring 5 and the friction part 7 is small, and the compression spring 6 makes the friction force between the conical graphite ring 5 and the friction part 7 large; as it progresses, the friction surface becomes larger and the friction force becomes smaller, so as to ensure that the difference in the amount of ground powder per unit time before and after is small. The powder generated by the wear of the graphite ring 5 scatters into the inner parts of the outer sleeve 3 and the coupling neck 12 to self-lubricate the rotation of the ball.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-performance crankshaft mechanism includes a main journal (1). At both ends of the main journal (1), cranks (2) are symmetrically installed. A coupling journal (12) is detachably installed between the two groups of cranks (2). An outer sleeve (3) is sleeved on the outer side of the coupling journal (12). Ball bearings are arranged between the coupling journal (12) and the outer sleeve (3). Hidden grooves are formed on the inner sides of the cranks (2). Both ends of the outer sleeve (3) are located inside the hidden grooves. A graphite ring (5) is arranged on the inner side of the hidden grooves. It is characterized in that, A compression spring (6) and a limiting component are connected between the outer sleeve (3) and the graphite ring (5); A friction part (7) that contacts the end of the graphite ring (5) away from the outer sleeve (3) is arranged inside the hidden groove. The graphite ring (5) is conical, and the diameter of one end of the graphite ring (5) close to the friction part (7) is smaller than that of the end away from the friction part (7).

2. A high-performance crankshaft mechanism according to claim 1, characterized in that: The limiting component includes a limiting ring (8) and a limiting rod (11). The limiting ring (8) is detachably installed at the end of the graphite ring (5). A plurality of the limiting rods (11) are all parallel to the axis of the outer sleeve (3) and are fixedly arranged in a circular array on the end face of the limiting ring (8) away from the graphite ring (5). A limiting hole (301) that is slidably matched with the limiting rod (11) is arranged on the side end of the outer sleeve (3).

3. A high-performance crankshaft mechanism according to claim 2, characterized in that: An installation ring (9) is fixed at the end of the graphite ring (5) away from the friction part (7). A plurality of positioning columns (10) are fixed on the end face of the installation ring (9) away from the graphite ring (5). A positioning hole (801) that is adapted to the positioning column (10) is arranged on the limiting ring (8).

4. A high-performance crankshaft mechanism according to claim 1, characterized in that: The friction part (7) is a plurality of friction blocks (71) that are evenly distributed in a ring on the inner wall of the hidden groove.

5. A high-performance crankshaft mechanism according to claim 4, characterized in that: The friction block (71) is rotatably installed on the inner wall of the hidden groove. The friction block (71) is cylindrical, and the arc surface of the friction block (71) contacts the graphite ring (5).

6. A high-performance crankshaft mechanism according to claim 5, characterized in that: The length of the friction block (71) is not less than the radial thickness of the graphite ring (5).

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