High-durability four-stroke crankshaft

Abstract

The high-durability four-stroke crankshaft comprises a shaft body, a connecting block and a connecting rod journal, the two ends of the connecting rod journal are fixedly connected with the shaft body and the connecting block respectively, an oil channel is formed in the connecting rod journal, the oil channel is obliquely arranged and penetrates through the shaft body, a mounting hole is formed in the connecting rod journal, and the connecting rod journal is fixedly connected with the connecting block. The oil duct is located inside the mounting hole, the mounting hole is in threaded connection with a mounting sleeve, the mounting sleeve is connected with a filter screen, the inner wall of the mounting hole is provided with a placement concave hole, the placement concave hole is internally connected with a positioning column through an elastic assembly, the side wall of the mounting sleeve is provided with a positioning concave hole, and the positioning concave hole is connected with the positioning column through an elastic assembly. The end of the positioning column is hemispherical and used for being embedded into the positioning concave hole, a clamping groove is formed in the end, away from the filter screen, of the mounting sleeve, and the purpose that the mounting sleeve is not prone to damage is achieved by limiting rotation of the mounting sleeve.

Description

Technical Field

[0001] The utility model relates to a crankshaft, in particular to a high-durability four-stroke crankshaft. Background Art

[0002] The crankshaft is the most important component in the engine.

[0003] At present, a Chinese patent with authorization announcement number CN205173209U discloses a crankshaft, which solves the problem in the prior art that impurities in the oil channel on the crankshaft easily clog the oil hole, thereby affecting the lubrication effect between the crankshaft and other accessories on the power machine. The key points of its technical solution are a crankshaft, including a crankshaft body, the crankshaft body including a connecting rod journal and a crankshaft journal, a straight oil hole is provided on the crankshaft journal, an oblique oil hole is provided on the connecting rod journal, the oblique oil hole and the straight oil hole are connected to form an oil channel, a filter is provided at the oil inlet of the oil channel, the filter is detachably fixedly connected to the oil inlet of the oil channel, and impurities in the oil channel are filtered out by the filter.

[0004] However, when in use, since lubricating oil is injected into the oil channel and the filter is fixed on the collar, the collar is fixed at the oil inlet by a threaded connection. Since the lubricating oil has a strong lubricity, the self-locking property of the thread will fail. In addition, due to the centrifugal force generated when the crankshaft rotates, the collar will move away from the oil inlet, causing a collision between the collar and the bearing, which can easily cause damage to the collar. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a high-durability four-stroke crankshaft, which makes the mounting sleeve less likely to rotate through an elastic component, so that the mounting sleeve can be placed stably in the oil channel to achieve the purpose of being less likely to be damaged.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a high-durability four-stroke crankshaft, comprising a shaft body, a connecting block and a connecting rod journal, the two ends of the connecting rod journal are respectively fixedly connected to the shaft body and the connecting block, the connecting rod journal is provided with an oil channel, the oil channel is inclined and passes through the shaft body, the connecting rod journal is provided with a mounting hole, the oil channel is located inside the mounting hole, the mounting hole is threaded with a mounting sleeve, the mounting sleeve is connected with a filter, the inner wall of the mounting hole is provided with a placement recessed hole, the placement recessed hole is connected with a positioning column through an elastic component, the side wall of the mounting sleeve is provided with a positioning recessed hole, the end of the positioning column is hemispherical and is used to be embedded in the positioning recessed hole, and the end of the mounting sleeve away from the filter is provided with a card groove.

[0007] To implement the above technical solution, the filter screen is connected to the mounting sleeve, and the mounting sleeve is aligned with the mounting hole. The mounting sleeve is moved along the axial direction of the mounting hole through the conduction effect of the thread. After the edge of the mounting sleeve contacts the outer wall of the positioning column, the force applied to the mounting sleeve is increased to press the positioning column into the placement recessed hole. As the mounting sleeve continues to move, when the positioning column corresponds to the positioning recessed hole, the positioning column is pressed against the inner wall of the positioning recessed hole through the elastic force of the elastic component, so that the mounting sleeve is not easy to rotate, thereby making the mounting sleeve not easy to be damaged.

[0008] As a preferred solution of the utility model, the elastic component includes an elastic member, an anti-slip ring, and a clamping plate. The clamping plate is fixed to the end of the positioning column and is located in the placement recessed hole. The anti-slip ring is threadedly connected to the opening of the placement recessed hole and is used to interfere with the clamping plate. The positioning column passes through the anti-slip ring. The elastic member is located inside the placement recessed hole and one end is connected to the inner wall of the placement recessed hole, and the other end is connected to the positioning column.

[0009] To implement the above technical solution, the mounting sleeve rotates and moves along the axial direction of the mounting hole. When the edge of the mounting sleeve conflicts with the positioning column, since the end of the positioning column is hemispherical, the force applied to the mounting sleeve is increased, and the positioning column is pressed into the placement recessed hole. The elastic member is further compressed. When the positioning recessed hole on the mounting sleeve corresponds to the positioning column, the end of the positioning column is embedded in the positioning recessed hole through the elastic force of the elastic member, so that the mounting sleeve is not easy to rotate. When the filter needs to be replaced, the mounting sleeve is screwed out of the mounting hole, and the clamping plate conflicts with the anti-slip ring, so that the positioning column cannot fall out of the placement recessed hole.

[0010] As a preferred solution of the utility model, an L-shaped plate is fixedly connected to the installation sleeve, two L-shaped plates are arranged opposite to each other and form a channel for placing the filter screen, and the L-shaped plate and the filter screen are connected by a limiting structure.

[0011] To implement the above technical solution, the filter is inserted between the two L-shaped plates and the filter is positioned by the limiting structure, so that a fixed connection between the filter and the installation sleeve can be achieved, and the filter can be easily disassembled and assembled.

[0012] As a preferred solution of the utility model, the limiting structure includes an elastic plate and a limiting groove. The elastic plate is fixed on the L-shaped plate and is arranged opposite to the mounting sleeve. The limiting groove is opened on the filter screen. The filter screen moves along the length direction of the L-shaped plate and makes the middle part of the elastic plate embedded in the limiting groove.

[0013] To implement the above technical solution, the filter is passed between the two L-shaped plates, one side of the filter is in contact with the L-shaped plate, and the other side is in contact with the mounting sleeve. When the limiting groove on the filter corresponds to the elastic plate, the elastic plate is embedded in the limiting groove to realize the positioning of the filter, which is easy to operate.

[0014] As a preferred solution of the utility model, a baffle is fixedly connected to the installation sleeve, and the baffle is located between the two L-shaped plates and is used to abut against the end of the filter screen.

[0015] To implement the above technical solution, the baffle plate contacts the end of the filter screen to prevent the filter screen from passing through between the two L-shaped plates due to excessive force.

[0016] As a preferred solution of the utility model, a groove is provided at the end of the filter screen.

[0017] To implement the above technical solution, the fingers are brought into contact with the inner wall of the groove so as to facilitate the filter to be pulled out from between the two L-shaped plates.

[0018] As a preferred solution of the utility model, a first keyway and a second keyway are provided on the shaft.

[0019] The above technical solution is implemented to facilitate connection with other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0021] Figure 2 To reflect the structural diagram of the installation sleeve;

[0022] Figure 3 A schematic diagram showing the position of the baffle;

[0023] Figure 4 To reflect the structural diagram of the filter;

[0024] Figure 5 A schematic diagram showing the cross-sectional structure of the positioning column;

[0025] Figure 6 A schematic diagram of the three-dimensional structure of the positioning column.

[0026] Figure numerals: 11, shaft body; 12, connecting block; 2, connecting rod journal; 3, oil channel; 31, mounting hole; 4, mounting sleeve; 40, positioning recessed hole; 401, clamping groove; 402, chamfer; 41, filter screen; 411, pull groove; 42, L-shaped plate; 51, elastic plate; 52, limiting groove; 6, baffle; 7, placement recessed hole; 8, elastic component; 81, elastic member; 82, anti-slip ring; 83, clamping plate; 91, first keyway; 92, second keyway; 10, positioning column. DETAILED DESCRIPTION

[0027] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0028] A high-durability four-stroke crankshaft comprises a shaft body 11, a connecting block 12 and a connecting rod journal 2. The two ends of the connecting rod journal 2 are respectively fixedly connected to the shaft body 11 and the connecting block 12, and there are two connecting rod journals 2, which are respectively located on both sides of the connecting block 12. The two connecting rod journals 2 are coaxially arranged.

[0029] An oil passage 3 is provided on the connecting rod journal 2 . The oil passage 3 is arranged obliquely and passes through the shaft body 11 .

[0030] A mounting hole 31 is provided on the connecting rod journal 2, and the axis extension line of the mounting hole 31 is perpendicular to the axis of the connecting rod journal 2. The oil passage 3 is located inside the mounting hole 31, and a mounting sleeve 4 is threadedly connected to the mounting hole 31, and a filter screen 41 is connected to the mounting sleeve 4. In order to reduce resource waste, the mounting sleeve 4 and the filter screen 41 are detachably connected.

[0031] An L-shaped plate 42 is fixedly connected to the side of the mounting sleeve 4 facing the oil channel 3. The two L-shaped plates 42 are arranged opposite to each other and form a channel for placing the filter 41. The filter 41 passes between the two L-shaped plates 42 and is connected to the filter 41 by a limiting structure.

[0032] The limiting structure includes an elastic plate 51 and a limiting groove 52. The elastic plate 51 is fixed on the L-shaped plate 42 and arranged opposite to the mounting sleeve 4. The elastic plate 51 is arranged obliquely on the filter screen 41. The filter screen 41 moves along the length direction of the L-shaped plate 42 and the middle part of the elastic plate 51 is embedded in the limiting groove 52. The elastic plate 51 is arranged in a herringbone shape.

[0033] A baffle plate 6 is fixedly connected to the mounting sleeve 4 . The baffle plate 6 is located between the two L-shaped plates 42 and is used to abut against the end of the filter screen 41 .

[0034] A groove 411 is formed at the end of the filter screen 41 .

[0035] During installation, the filter 41 is pushed between the two L-shaped plates 42. When the end of the filter 41 contacts the baffle 6, the middle of the elastic plate 51 is just embedded in the limiting groove 52. When the filter 41 is blocked, the installation sleeve 4 is removed from the installation hole 31, and then the fingers contact the inner wall of the groove 411 to pass the hard thin plastic plate between the filter 41 and the L-shaped plate 42. The hard thin plastic plate contacts the elastic plate 51, so that the elastic plate 51 is moved out of the limiting groove 52, and the filter 41 can be pulled out from the L-shaped plate 42, so that the filter 41 can be replaced.

[0036] A placement recess 7 is provided on the inner wall of the mounting hole 31, and a positioning column 10 is connected to the placement recess 7 through an elastic component 8. A positioning recess 40 is provided on the side wall of the mounting sleeve 4, and the end of the positioning column 10 is hemispherical and is used to be embedded in the positioning recess 40.

[0037] The elastic component 8 includes an elastic member 81, an anti-slip ring 82, and a clamping plate 83. The clamping plate 83 is fixed to the end of the positioning column 10 and is located in the placement recessed hole 7. The anti-slip ring 82 is threadedly connected to the opening of the placement recessed hole 7 and is used to interfere with the clamping plate 83, thereby preventing the positioning column 10 from slipping out of the placement recessed hole 7. The positioning column 10 passes through the anti-slip ring 82. The elastic member 81 is located inside the placement recessed hole 7 and one end is connected to the inner wall of the placement recessed hole 7, and the other end is connected to the positioning column 10. The elastic member 81 is a spring.

[0038] A slot 401 is formed at one end of the installation sleeve 4 away from the filter screen 41 to facilitate the installation sleeve 4 to rotate.

[0039] A chamfer 402 is provided at one end of the installation sleeve 4 away from the slot 401 . When the inclined surface generated by the chamfer 402 abuts against the end of the positioning post 10 , the positioning post 10 can enter the placement recess 7 more easily.

[0040] The shaft body 11 is provided with a first key groove 91 and a second key groove 92 .

[0041] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A high-durability four-stroke crankshaft, comprising a shaft body (11), a connecting block (12) and a connecting rod journal (2), wherein the two ends of the connecting rod journal (2) are respectively fixedly connected to the shaft body (11) and the connecting block (12), and an oil passage (3) is provided on the connecting rod journal (2), wherein the oil passage (3) is arranged obliquely and passes through the shaft body (11), and wherein the characteristics are: The connecting rod journal (2) is provided with a mounting hole (31), the oil passage (3) is located inside the mounting hole (31), a mounting sleeve (4) is threadedly connected to the mounting hole (31), a filter screen (41) is connected to the mounting sleeve (4), a placement recess (7) is provided on the inner wall of the mounting hole (31), a positioning column (10) is connected to the placement recess (7) via an elastic component (8), a positioning recess (40) is provided on the side wall of the mounting sleeve (4), an end of the positioning column (10) is hemispherical and is used to be embedded in the positioning recess (40), and a slot (401) is provided on the end of the mounting sleeve (4) away from the filter screen (41).

2. A high-durability four-stroke crankshaft according to claim 1, characterized in that: The elastic component (8) comprises an elastic member (81), an anti-slip ring (82), and a clamping plate (83); the clamping plate (83) is fixed to the end of the positioning column (10) and is located in the placement recessed hole (7); the anti-slip ring (82) is threadedly connected to the opening of the placement recessed hole (7) and is used to abut against the clamping plate (83); the positioning column (10) passes through the anti-slip ring (82); the elastic member (81) is located inside the placement recessed hole (7) and one end is connected to the inner wall of the placement recessed hole (7), and the other end is connected to the positioning column (10).

3. The high-durability four-stroke crankshaft according to claim 1 is characterized in that: An L-shaped plate (42) is fixedly connected to the installation sleeve (4), and the two L-shaped plates (42) are arranged opposite to each other and form a channel for placing the filter screen (41), and the L-shaped plate (42) and the filter screen (41) are connected via a limiting structure.

4. A high-durability four-stroke crankshaft according to claim 3, characterized in that: The limiting structure comprises an elastic plate (51) and a limiting groove (52); the elastic plate (51) is fixed on the L-shaped plate (42) and arranged opposite to the mounting sleeve (4); the limiting groove (52) is opened on the filter screen (41); the filter screen (41) moves along the length direction of the L-shaped plate (42) and enables the middle part of the elastic plate (51) to be embedded in the limiting groove (52).

5. The high-durability four-stroke crankshaft according to claim 4 is characterized in that: A baffle (6) is fixedly connected to the mounting sleeve (4), and the baffle (6) is located between the two L-shaped plates (42) and is used to abut against the end of the filter screen (41).

6. A high-durability four-stroke crankshaft according to claim 5, characterized in that: A groove (411) is provided at the end of the filter screen (41).

7. The high-durability four-stroke crankshaft according to claim 1 is characterized in that: The shaft body (11) is provided with a first key groove (91) and a second key groove (92).

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