High-coaxiality engine double-cylinder crankshaft

Abstract

The high-coaxiality engine double-cylinder crankshaft comprises a shaft body, an anti-friction assembly and a fixing piece, the shaft body comprises an end shaft, a crank is arranged at one end of the end shaft, a connecting rod journal is arranged on one side of the crank, the anti-friction assembly is arranged outside the connecting rod journal, and the anti-friction assembly comprises a first arc-shaped cover and a second arc-shaped cover. The outer walls of the first arc-shaped cover and the second arc-shaped cover are connected with rolling pieces in a penetrating mode, and the fixing pieces are connected to the outer wall of the anti-friction assembly in a penetrating mode. By means of the design of the anti-friction assembly and the fixing piece, lubricating oil flows out of the oil outlet, fills the space among the first arc-shaped cover, the second arc-shaped cover and the connecting rod journal and overflows through rotation of the balls, lubrication between the connecting rod journal and the piston rod is achieved through the lubricating oil, and when the lubricating oil is lacked, the balls roll through the balls, so that the piston rod is lubricated. The friction between the piston rod and the rod journal is reduced, and the friction damage between the piston rod and the rod journal before the lubricating oil is supplemented is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to double -cylinder crankshaft technical field especially relates to a high coaxial degree's engine double -cylinder crankshaft. BACKGROUND

[0002] High coaxial degree double -cylinder crankshaft is the core rotating component for double -cylinder engine in internal combustion engine, and its core design requirement is that the axis of the main journal of crankshaft and connecting rod journal keeps very high coaxial degree in space.

[0003] Double -cylinder crankshaft is connected with piston rod through connecting rod journal, when piston rod drives connecting rod journal to rotate, in order to keep the lubrication between piston rod and connecting rod journal, the output of lubricating oil will be carried out in the contacting part, and the friction between piston rod and connecting rod journal is reduced, but when lubricating oil is lacking during use, the timely addition of lubricating oil between piston rod and connecting rod journal cannot be obtained, then the friction between piston rod and connecting rod journal is intensified, and the damage of part is caused. UTILITY MODEL CONTENTS

[0004] The utility model discloses a high coaxial degree's engine double -cylinder crankshaft to solve the problem in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a high coaxial degree's engine double -cylinder crankshaft, comprising:

[0006] The shaft body comprises an end shaft, one end of the end shaft is provided with a crank, one side of the crank is provided with a connecting rod journal for connecting with a piston rod;

[0007] The anti-friction assembly is provided outside the connecting rod journal, and the anti-friction assembly comprises a first arc-shaped cover and a second arc-shaped cover, and the outer walls of the first arc-shaped cover and the second arc-shaped cover are connected with rolling elements for preventing friction;

[0008] The fixing piece is connected with the outer wall of the anti-friction assembly, and the fixing piece is used for fixedly connecting the anti-friction assembly with the connecting rod journal.

[0009] Preferably, one end of the end shaft is fixedly connected with the other side of the crank, and one side of the crank is fixedly connected with one end of the connecting rod journal.

[0010] Preferably, the outer wall of the end shaft is provided with an oil inlet for conveying lubricating oil, the outer wall of the connecting rod journal is provided with an oil outlet for outputting lubricating oil, and the oil inlet and the oil outlet are mutually penetrated.

[0011] Preferably, the outer wall of the connecting rod journal is provided with a circular arc groove for inserting the first arc-shaped cover and the second arc-shaped cover, the side of the circular arc groove is provided with a mounting groove, and the inner wall of the mounting groove is provided with a threaded groove for mounting a fixing member.

[0012] Preferably, the fixing member comprises a fixing bolt which is threadedly connected with the threaded groove.

[0013] Preferably, the side of the first arc-shaped cover and the second arc-shaped cover is respectively fixedly connected with a fixing plate for penetrating the fixing bolt, and the outer wall of the fixing plate is provided with a penetrating groove.

[0014] Preferably, the rolling member comprises a ball, the outer wall of the first arc-shaped cover and the second arc-shaped cover is respectively provided with a rotating groove for penetrating the ball, and the side of the first arc-shaped cover and the second arc-shaped cover towards the connecting rod journal is fixedly connected with a sealing strip for sealing.

[0015] Preferably, the end of the first arc-shaped cover is provided with a limiting groove, the end of the second arc-shaped cover is fixedly connected with a inserting rod, and the inserting rod is penetratingly connected with the limiting groove.

[0016] The technical effects and advantages of the present application are as follows:

[0017] The present application utilizes the design of the anti-friction assembly and the fixing member, the first arc-shaped cover and the second arc-shaped cover are fixedly sleeved on the outer wall of the connecting rod journal through the fixing bolt, the lubricating oil flows out from the oil outlet, fills between the first arc-shaped cover, the second arc-shaped cover and the connecting rod journal, and overflows through the rotation of the ball, the lubricating oil realizes the lubrication between the connecting rod journal and the piston rod, when the lubricating oil is insufficient, the ball can reduce the friction between the piston rod and the connecting rod journal through the rolling of the ball, and the friction damage between the piston rod and the connecting rod journal before the lubricating oil is supplemented is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole three-dimensional structure schematic view of the present application.

[0019] Figure 2 It is a whole three-dimensional structure schematic view of the present application. Figure 1 It is an enlarged structure schematic view of the present application.

[0020] Figure 3 It is a shaft body three-dimensional structure schematic view of the present application.

[0021] Figure 4 It is an anti-friction assembly three-dimensional structure schematic view of the present application.

[0022] Figure 5 It is a second arc-shaped cover three-dimensional structure schematic view of the present application.

[0023] Figure 6The first arc-shaped cover three-dimensional structure schematic view of the utility model is shown in the figure.

[0024] In the figure: 1, shaft body; 11, end shaft; 12, crank; 13, connecting rod journal; 2, oil inlet; 3, oil outlet; 4, anti-friction assembly; 41, first arc-shaped cover; 42, second arc-shaped cover; 43, ball; 44, sealing strip; 45, fixed plate; 46, plug rod; 5, fixing bolt. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] The utility model provides a kind of high coaxiality's engine double cylinder crankshaft as Figures 1-6 As shown in the figure, it comprises:

[0027] Shaft body 1, shaft body 1 includes end shaft 11, and one end of end shaft 11 is provided with crank 12, and one side of crank 12 is provided with connecting rod journal 13 for connecting with piston rod;

[0028] Anti-friction assembly 4, anti-friction assembly 4 is arranged outside connecting rod journal 13, and anti-friction assembly 4 includes first arc-shaped cover 41 and second arc-shaped cover 42, and the outer wall of first arc-shaped cover 41 and second arc-shaped cover 42 is connected with rolling element for preventing friction;

[0029] Fixed part, fixed part is connected in the outer wall of anti-friction assembly 4, and fixed part is used for the fixed connection of anti-friction assembly 4 and connecting rod journal 13.

[0030] One end of end shaft 11 is fixedly connected with the other side of crank 12, and one side of crank 12 is fixedly connected with one end of connecting rod journal 13.

[0031] The outer wall of end shaft 11 is provided with oil inlet 2 for conveying lubricating oil, and the outer wall of connecting rod journal 13 is provided with oil outlet 3 for outputting lubricating oil, and oil inlet 2 and oil outlet 3 are mutually penetrated.

[0032] Further, four cranks 12 are provided, two connecting rod journals 13 are provided, and shaft body 1 is the existing high coaxiality engine double cylinder crankshaft, and the inner part of end shaft 11, crank 12 and connecting rod journal 13 is respectively provided with mutually penetrated oil conveying pipeline, and the pressurized input of lubricating oil is carried out through oil inlet 2, and lubricating oil is conveyed to oil outlet 3 through internal oil conveying pipeline, to realize the lubrication of connecting rod journal 13 and piston rod connecting part, to avoid friction damage.

[0033] The outer wall of the connecting rod journal 13 is provided with a circular arc groove for inserting the first arc-shaped cover 41 and the second arc-shaped cover 42, and the side of the circular arc groove is provided with a mounting groove, and the inner wall of the mounting groove is provided with a threaded groove for mounting a fixing member.

[0034] The fixing member includes a fixing bolt 5 which is threadedly connected with the threaded groove.

[0035] The side of the first arc-shaped cover 41 and the second arc-shaped cover 42 is respectively fixedly connected with a fixing plate 45 for inserting the fixing bolt 5, and the outer wall of the fixing plate 45 is provided with an insertion groove.

[0036] Further, the first arc-shaped cover 41 and the second arc-shaped cover 42 are symmetrically arranged, and are both arc-shaped concave plates, the size of the circular arc groove corresponds to the size of the first arc-shaped cover 41 and the second arc-shaped cover 42, the first arc-shaped cover 41 and the second arc-shaped cover 42 are respectively placed in the circular arc groove to cover the circular arc groove, at this time, the outer wall of the first arc-shaped cover 41 and the second arc-shaped cover 42 is flush with the outer wall of the connecting rod journal 13, the size of the mounting groove corresponds to the size of the fixing plate 45, the threads of the inner wall of the threaded groove and the threads of the outer wall of the fixing bolt 5 are engaged with each other, the fixing bolt 5 is inserted in the insertion groove and the threaded groove at the same time to fix the fixing plate 45 and the connecting rod journal 13, so that the first arc-shaped cover 41 and the second arc-shaped cover 42 can be fixedly installed in the circular arc groove, the fixing plate 45 is provided with four, which are respectively located on both sides of the first arc-shaped cover 41 and the second arc-shaped cover 42, and the part of the fixing plate 45 in contact with the first arc-shaped cover 41 or the second arc-shaped cover 42 is fixed by welding.

[0037] The rolling member includes a rolling ball 43, the outer wall of the first arc-shaped cover 41 and the second arc-shaped cover 42 is respectively provided with a rotating groove for inserting the rolling ball 43, and the side of the first arc-shaped cover 41 and the second arc-shaped cover 42 facing the connecting rod journal 13 is fixedly connected with a sealing strip 44 for sealing.

[0038] The end of the first arc-shaped cover 41 is provided with a limiting groove, the end of the second arc-shaped cover 42 is fixedly connected with a plug rod 46 which is insertedly connected with the limiting groove.

[0039] Further, the shape of the rotating groove is matched with the ball 43, the ball 43 is a stainless steel ball, the part of the ball 43 extending out of the outer wall of the first arc-shaped cover 41 or the second arc-shaped cover 42 is one fifth of the total volume of the ball 43, the rotating groove has a smooth inner wall, the rotating groove and the ball 43 are not completely closed, when the ball 43 rotates, the lubricating oil can overflow from between the first arc-shaped cover 41 or the second arc-shaped cover 42 and the connecting rod journal 13, the sealing strip 44 is arranged on the side of the first arc-shaped cover 41 and the second arc-shaped cover 42 facing the connecting rod journal 13, the sealing strip 44 can prevent the lubricating oil from overflowing from the side of the first arc-shaped cover 41 or the second arc-shaped cover 42, the size of the limiting groove is matched with the inserting rod 46, the outer wall of the first arc-shaped cover 41 and the second arc-shaped cover 42 is provided with a plurality of rotating grooves, and each rotating groove is provided with a ball 43.

[0040] When the first arc-shaped cover 41 and the second arc-shaped cover 42 are installed, the balls 43 are arranged in the rotating grooves of the first arc-shaped cover 41 and the second arc-shaped cover 42, then the inserting rod 46 is inserted into the limiting groove, so that the first arc-shaped cover 41 and the second arc-shaped cover 42 are prevented from being separated when the fixing bolt 5 is installed, then the fixing bolt 5 is inserted into the fixing plate 45 and the threaded groove, so that the position of the first arc-shaped cover 41 and the second arc-shaped cover 42 is fixed, at this time, the first arc-shaped cover 41, the second arc-shaped cover 42 and the connecting rod journal 13 form a cavity, the lubricating oil flowing out of the oil outlet 3 can fill in the cavity, and the lubricating oil can overflow from the rotating groove or the gap between the ball 43 and the rotating groove, so that the connecting rod journal 13 and the connecting part of the piston rod are lubricated, when the lubricating oil is insufficient and cannot be added in time, the connecting part between the connecting rod journal 13 and the piston rod can drive the ball 43 to roll, so that the friction is prevented, and the damage of the connecting part between the connecting rod journal 13 and the piston rod is avoided.

[0041] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A high coaxiality twin-cylinder crankshaft for an engine, characterized in that, include: Shaft body (1), the shaft body (1) includes an end shaft (11), one end of the end shaft (11) is provided with a crank (12), and one side of the crank (12) is provided with a connecting rod journal (13) for connecting with the piston rod; Anti-friction component (4), the anti-friction component (4) is disposed outside the connecting rod journal (13), the anti-friction component (4) includes a first arc-shaped cover (41) and a second arc-shaped cover (42), and the outer walls of the first arc-shaped cover (41) and the second arc-shaped cover (42) are interposed with rolling elements for preventing friction; A fastener is inserted into the outer wall of the anti-friction assembly (4) and is used for the fixed connection between the anti-friction assembly (4) and the connecting rod journal (13).

2. The high coaxiality twin-cylinder crankshaft for an engine according to claim 1, characterized in that, One end of the end shaft (11) is fixedly connected to the other side of the crank (12), and one side of the crank (12) is fixedly connected to one end of the connecting rod journal (13).

3. The high coaxiality twin-cylinder crankshaft for an engine according to claim 2, characterized in that, The outer wall of the end shaft (11) is provided with an oil inlet (2) for conveying lubricating oil, and the outer wall of the connecting rod journal (13) is provided with an oil outlet (3) for discharging lubricating oil. The oil inlet (2) and the oil outlet (3) are interconnected.

4. The high coaxiality twin-cylinder crankshaft for an engine according to claim 1, characterized in that, The outer wall of the connecting rod journal (13) is provided with an arc groove for inserting the first arc cover (41) and the second arc cover (42). The side of the arc groove is provided with an installation groove, and the inner wall of the installation groove is provided with a threaded groove for installing a fastener.

5. A high coaxiality engine twin-cylinder crankshaft according to claim 4, characterized in that, The fastener includes a fixing bolt (5), which is threadedly connected to a threaded groove.

6. A high coaxiality engine twin-cylinder crankshaft according to claim 5, characterized in that, The first arc-shaped cover (41) and the second arc-shaped cover (42) are respectively fixedly connected to the sides of the fixing plate (45) for inserting the fixing bolt (5), and the outer wall of the fixing plate (45) is provided with a through slot.

7. A high coaxiality twin-cylinder crankshaft for an engine according to claim 1, characterized in that, The rolling element includes a ball (43), and the outer walls of the first arc-shaped cover (41) and the second arc-shaped cover (42) are respectively provided with rotating grooves for inserting the ball (43). The first arc-shaped cover (41) and the second arc-shaped cover (42) are fixedly connected with sealing strips (44) for sealing on the side facing the connecting rod journal (13).

8. A high coaxiality twin-cylinder crankshaft for an engine according to claim 1, characterized in that, The first arc-shaped cover (41) has a limiting groove at its end, and the second arc-shaped cover (42) has a rod (46) fixedly connected to its end, with the rod (46) inserted into the limiting groove.

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