A rectangular groove type crankshaft thrust device

Abstract

The present invention discloses a rectangular groove type crankshaft thrust device, comprising a crankshaft mounted on a cylinder block, a thrust mechanism limited with the end of the crankshaft on the flywheel housing of the cylinder block, and the thrust mechanism comprising a limiting convex edge provided at the end of the crankshaft and an inner thrust plate and an outer thrust plate detachably provided at the center hole of the flywheel housing and respectively adapted to the two end surfaces of the limiting convex edge. The rectangular groove type crankshaft thrust device of the present invention belongs to the technical field of engine assembly, the thrust assembly of the crankshaft is mounted on the outer side of the cylinder block of the engine cylinder block, which is safe and reliable, easy to disassemble and assemble, and convenient for fault diagnosis and maintenance of the engine; moreover, the thrust mechanism is arranged outside the cylinder block, the layout space becomes larger, a thrust structure of larger size can be arranged, the strength of the thrust is improved, and the problem that the thrust plate of the prior art is limited by the width of the main bearing, so that the thrust plate design is relatively thin and the rigidity is insufficient.

Description

Technical Field

[0001] The invention relates to engine assembly technology, and more particularly to a rectangular groove type crankshaft thrust device. Background Art

[0002] The engine's crankshaft thrust device is mainly used to prevent the crankshaft from axial movement and avoid direct contact between the crankshaft and the cylinder block. For high-speed, high-power V-type engines, the crankshaft will move axially during operation, and if helical gears are used, additional axial force will be generated. Therefore, the reliability of the thrust device will have a direct impact on the life of the engine.

[0003] The traditional crankshaft thrust structure is generally located inside the cylinder block, arranged on both sides of the first gear main bearing seat, and installed together with the crankshaft. Limited by the width of the main bearing, the thrust plate is designed to be relatively thin and lacks rigidity. In addition, since the thrust plate is arranged inside the cylinder block, it is difficult to disassemble and assemble. If abnormal wear and other faults occur, it will cause great difficulties in engine fault diagnosis and maintenance.

[0004] For high-speed, high-power V-type engines, due to the large number of cylinders and uneven operation of each cylinder, the crankshaft movement is relatively large, which puts higher requirements on the thrust structure. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. The purpose of the present invention is to provide a rectangular groove type crankshaft thrust device which is easy to disassemble and assemble, has a firm thrust member structure and a long service life.

[0006] To achieve the above object, the present invention provides a rectangular groove type crankshaft thrust device, comprising a crankshaft mounted on a cylinder block, wherein a thrust mechanism which limits the end of the crankshaft is provided on a flywheel housing of the cylinder block.

[0007] Furthermore, the thrust mechanism includes a limiting flange provided at the end of the crankshaft and an inner thrust plate and an outer thrust plate detachably provided at the center hole of the flywheel housing and respectively adapted to the two end surfaces of the limiting flange.

[0008] Furthermore, the inner thrust plate and the outer thrust plate are provided with an oil inlet channel connected to the cylinder block lubricating oil channel, and the end surfaces of the opposite ends of the inner thrust plate and the outer thrust plate are provided with a lubricating oil groove connected to the oil inlet channel and an oil drain groove connected to the lubricating oil groove.

[0009] Furthermore, the inner end surfaces of the inner thrust plate and the outer thrust plate are provided with oil inlet holes that can connect the oil inlet channels in the inner thrust plate and the outer thrust plate with the lubricating oil channel of the cylinder body, and the lubricating oil groove is provided with an oil outlet hole that is connected with the oil inlet channels in the inner thrust plate and the outer thrust plate.

[0010] Furthermore, the inner thrust plate and the outer thrust plate are arc-shaped plate structures, the oil inlet channel is a countersunk hole structure extending inwardly in the radial direction from the outer circumferential surface of the inner thrust plate and the outer thrust plate, and the outer end of the countersunk hole structure in the inner thrust plate and the outer thrust plate is provided with a blockage; the oil inlet hole is an oil hole structure extending in the axial direction from the inner end surface of the inner thrust plate and the outer thrust plate.

[0011] Furthermore, the lubricating oil groove is an arc-shaped groove structure, and the oil drain groove is an arc-shaped groove structure with both ends extending to the bottom surfaces of the inner thrust plate and the outer thrust plate; the lubricating oil groove and the oil drain groove are arranged in parallel, and the end surfaces of the opposite ends of the inner thrust plate and the outer thrust plate are provided with oil grooves that connect the lubricating oil groove and the oil drain groove.

[0012] As a further improvement, the inner thrust plate is provided with a connecting hole connected to the outer thrust plate, the outer side of the outer thrust plate is provided with an annular oil seal seat connected to the flywheel housing, and the hole wall of the annular oil seal seat is provided with an oil seal adapted to the outer cylindrical surface of the crankshaft.

[0013] Furthermore, the cross-section of the annular oil seal seat is "L"-shaped, and the annular oil seal seat includes a positioning cylinder adapted to the center hole of the flywheel housing and a positioning convex edge protruding from the outer end of the positioning cylinder and adapted to the end surface of the center hole of the flywheel housing, the inner end of the positioning cylinder is provided with an arc-shaped connecting plate connected to the outer thrust plate, and the oil seal is installed on the outer end of the positioning cylinder.

[0014] Furthermore, a flywheel is provided at the end of the crankshaft, a connecting bolt connected to the crankshaft is provided on the flywheel, a signal tooth is provided at the inner end sleeve of the flywheel, and a transition plate is provided at the outer end of the flywheel housing.

[0015] Beneficial Effects

[0016] Compared with the prior art, the rectangular groove type crankshaft thrust device of the present invention has the following beneficial effects: the rectangular groove type crankshaft thrust device of the present invention, the thrust assembly of the crankshaft is installed on the outer side of the cylinder block of the engine cylinder block, which is safe and reliable, easy to disassemble and assemble, and convenient for fault diagnosis and maintenance of the engine; moreover, the thrust mechanism is arranged outside the cylinder block, the layout space becomes larger, and a larger thrust structure can be arranged, thereby improving the strength of the thrust, and solving the problem that the thrust plate of the prior art is limited by the width of the main bearing, resulting in the thrust plate design being relatively thin and insufficient in rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural cross-sectional view of a rectangular groove type crankshaft thrust device of the present invention;

[0018] Figure 2 yes Figure 1A schematic diagram of the structure enlargement at the center A;

[0019] Figure 3 It is an enlarged schematic diagram of the structure of the thrust stop mechanism in the present invention;

[0020] Figure 4 It is an enlarged side view of the structure of the inner thrust plate in the present invention;

[0021] Figure 5 It is an enlarged side view of the structure of the outer thrust plate in the present invention;

[0022] Figure 6 It is an enlarged cross-sectional view of the structure of the annular oil seal seat in the present invention;

[0023] Figure 7 It is an enlarged side view of the structure of the annular oil seal seat in the present invention.

[0024] In the figure: 1. crankshaft; 2. flywheel housing; 3. thrust mechanism; 4. limiting cam; 5. inner thrust plate; 6. outer thrust plate; 7. oil inlet channel; 8. lubricating oil groove; 9. oil drain groove; 10. oil inlet hole; 11. oil outlet hole; 12. plug; 13. oil groove; 14. connecting hole; 15. annular oil seal seat; 16. oil seal; 17. positioning cylinder; 18. positioning cam; 19. arc-shaped connecting plate; 20. flywheel; 21. connecting bolt; 22. signal tooth; 23. transition plate; 24. balance block; 25. bolt structure; 26. clearance groove. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0026] The specific implementation of the present invention is as follows: Figure 1-7 As shown, a rectangular groove type crankshaft thrust device comprises a crankshaft 1 mounted on a cylinder block, and a thrust mechanism 3 is provided on a flywheel housing 2 of the cylinder block, which is limited to the end of the crankshaft 1. In the rectangular groove type crankshaft thrust device, the thrust mechanism 3 is installed on the outside of the cylinder block of the engine cylinder block, which is safe and reliable, easy to disassemble and assemble, and convenient for fault diagnosis and maintenance of the engine; moreover, the thrust mechanism 3 is arranged outside the cylinder block, and the layout space becomes larger, and a thrust structure of larger size can be arranged, thereby improving the strength of the thrust, and solving the problem that the thrust plate of the prior art is limited by the width of the main bearing, so that the thrust plate design is relatively thin and the rigidity is insufficient.

[0027] In this embodiment, the thrust mechanism 3 includes a limiting convex edge 4 provided at the end of the crankshaft 1 and an inner thrust plate 5 and an outer thrust plate 6 which are detachably provided at the center hole of the flywheel housing 2 and are respectively adapted to the two end surfaces of the limiting convex edge 4. The inner end surface of the outer thrust plate 6 is provided with an annular convex edge adapted to the outer end surface of the inner thrust plate 5. The outer thrust plate 6 and the inner thrust plate 5 form a U-shaped groove adapted to the two end surfaces of the limiting convex edge 4. After the inner thrust plate 5 and the outer thrust plate 6 are assembled and installed on the limiting convex edge 4 of the crankshaft 1, they are fixed to the flywheel housing 2 as a whole, and the installation is convenient and fast; moreover, the end of the crankshaft 1 is located on the inner side of the limiting convex edge 4 and is narrowed to provide a clearance groove 26. The clearance groove 26 can make way for the inner thrust plate 5, so that the width dimensions of the inner thrust plate 5 and the outer thrust plate 6 can be set relatively large, thereby enhancing the structural strength of the thrust plate.

[0028] In this embodiment, an oil inlet channel 7 connected to the cylinder block lubricating oil channel is provided inside the inner thrust plate 5 and the outer thrust plate 6. A lubricating oil groove 8 connected to the oil inlet channel 7 and an oil drain groove 9 connected to the lubricating oil groove 8 are provided on the end surfaces at the opposite ends of the inner thrust plate 5 and the outer thrust plate 6. An oil hole connected to the lubricating oil channel inside the engine cylinder block is provided on the end surface of the engine cylinder block. The oil inlet channel 7 is connected to the oil hole on the end surface of the engine cylinder block. Lubricated oil enters the oil inlet channel 7 and then flows to the lubricating oil groove 8. The lubricating oil groove 8 is arranged to fit the two end surfaces of the limiting convex edge 4. The lubricating oil lubricates the fitting surfaces of the inner thrust plate 5 and the outer thrust plate 6 and the limiting convex edge 4, and then flows out through the oil drain groove 9 to the inner hole of the flywheel housing 2, and then flows back to the oil pan at the bottom of the crankcase.

[0029] In this embodiment, an oil inlet hole 10 is provided on the inner end surface of the inner thrust plate 5 and the outer thrust plate 6, which can connect the oil inlet channel 7 in the inner thrust plate 5 and the outer thrust plate 6 with the cylinder block lubricating oil channel, and an oil outlet hole 11 is provided in the lubricating oil groove 8, which is connected with the oil inlet channel 7 in the inner thrust plate 5 and the outer thrust plate 6. The oil inlet hole 10 is connected with the oil hole on the end surface of the engine cylinder block; the lubricating oil flows from the oil outlet hole 11 at the bottom end of the oil inlet channel 7 to the lubricating oil groove 8.

[0030] In this embodiment, the inner thrust piece 5 and the outer thrust piece 6 are arc-shaped pieces, the inner thrust piece 5 and the outer thrust piece 6 are semicircular, the oil inlet channel 7 is a countersunk hole structure extending inwardly from the outer circumferential surface of the inner thrust piece 5 and the outer thrust piece 6 in the radial direction, and the outer end of the countersunk hole structure in the inner thrust piece 5 and the outer thrust piece 6 is provided with a plug 12; the oil inlet hole 10 is an oil hole structure extending in the axial direction from the inner end surface of the inner thrust piece 5 and the outer thrust piece 6. The oil inlet hole 10, the oil outlet hole 11 and the oil inlet channel 7 are easy to process and have a simple structure, and the plug 12 is used after the oil inlet channel 7 is processed.

[0031] In this embodiment, the lubricating oil groove 8 is an arc-shaped groove structure, and the oil drain groove 9 is an arc-shaped groove structure with both ends extending to the bottom surfaces of the inner thrust plate 5 and the outer thrust plate 6; the lubricating oil groove 8 and the oil drain groove 9 are arranged in parallel, and the end surfaces of the inner thrust plate 5 and the outer thrust plate 6 at the opposite ends are provided with an oil passage groove 13 that connects the lubricating oil groove 8 and the oil drain groove 9. The oil passage groove 13 is used to transport the lubricating oil from the lubricating oil groove 8 to the oil drain groove 9, and then flow out to the center hole of the flywheel housing 2 through the openings at both ends of the oil drain groove 9. Since the inner end of the flywheel housing 2 is arranged close to the end surface of the cylinder body and is sealed, the lubricating oil then flows into the oil pan below the crankshaft 1 of the cylinder body.

[0032] When the lubricating oil flows through the oil groove 13 , the two end surfaces of the limiting convex edge 4 are lubricated and cooled.

[0033] In this embodiment, the inner thrust plate 5 is provided with a connecting hole 14 connected to the outer thrust plate 6, the outer side of the outer thrust plate 6 is provided with an annular oil seal seat 15 connected to the flywheel housing 2, and the hole wall of the annular oil seal seat 15 is provided with an oil seal 16 adapted to the outer cylindrical surface of the crankshaft 1.

[0034] In this embodiment, the outer thrust plate 6 is provided with a bolt structure 25 that passes through the connecting hole 14 and is connected to the inner thrust plate 5. The connecting hole 14 is a screw hole structure. During installation, the outer thrust plate 6 and the inner thrust plate 5 are positioned by pins and then locked by the bolt structure 25.

[0035] In this embodiment, the cross-section of the annular oil seal seat 15 is "L"-shaped. The annular oil seal seat 15 includes a positioning cylinder 17 adapted to the center hole of the flywheel housing 2 and a positioning flange 18 protruding from the outer end of the positioning cylinder 17 and adapted to the end surface of the center hole of the flywheel housing 2. The inner end of the positioning cylinder 17 is provided with an arc-shaped connecting plate 19 connected to the outer thrust plate 6. The oil seal 16 is installed at the outer end of the positioning cylinder 17, and the bolt structure 25 passes through the arc-shaped connecting plate 19, the outer thrust plate 6 and the connecting hole 14 of the inner thrust plate 5 for connection.

[0036] In this embodiment, the attached Figure 1 It can be seen that a flywheel 20 is provided at the end of the crankshaft 1, a connecting bolt 21 connected to the crankshaft 1 is provided on the flywheel 20, a signal tooth 22 is provided at the inner end of the flywheel 20, a transition plate 23 is provided at the outer end of the flywheel housing 2, and a balance block 24 is provided on the crankshaft 1. The arrangement of the flywheel 20, signal tooth 22 and other structures at the end of the crankshaft 1 will not interfere with the thrust mechanism 3, and the installation space for accommodating the thrust mechanism 3 is large, which is convenient for the arrangement of the thrust mechanism 3.

[0037] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A rectangular groove type crankshaft thrust device, comprising a crankshaft (1) mounted on a cylinder block, It is characterized in that The flywheel housing (2) of the cylinder body is provided with a thrust mechanism (3) which limits the end of the crankshaft (1), and the thrust mechanism (3) comprises a limiting convex edge (4) provided at the end of the crankshaft (1) and an inner thrust plate (5) and an outer thrust plate (6) which are detachably provided at the center hole of the flywheel housing (2) and are respectively adapted to the two end surfaces of the limiting convex edge (4), and the inner parts of the inner thrust plate (5) and the outer thrust plate (6) are provided with an oil inlet passage (7) which is communicated with the lubricating oil passage of the cylinder body. The end surfaces of the inner thrust plate (5) and the outer thrust plate (6) at the opposite ends thereof are provided with a lubricating oil groove (8) connected to the oil inlet passage (7) and an oil drain groove (9) connected to the lubricating oil groove (8). The inner end surfaces of the inner thrust plate (5) and the outer thrust plate (6) are provided with an oil inlet hole (10) capable of connecting the oil inlet passage (7) in the inner thrust plate (5) and the outer thrust plate (6) with the lubricating oil passage of the cylinder body. The lubricating oil groove (8) is provided with a lubricating oil drain groove (9) connected to the inner end surfaces of the inner thrust plate (5) and the outer thrust plate (6). The inner thrust plate (5) and the outer thrust plate (6) are arc-shaped plate structures, the oil inlet channel (7) is a countersunk hole structure extending inwardly in the radial direction from the outer circumferential surface of the inner thrust plate (5) and the outer thrust plate (6), and the outer end of the countersunk hole structure in the inner thrust plate (5) and the outer thrust plate (6) is provided with a plug (12); the oil inlet hole (10) is an inner end surface of the inner thrust plate (5) and the outer thrust plate (6) extending in the axial direction. The oil hole structure is characterized in that the lubricating oil groove (8) is an arc-shaped groove structure, and the oil drain groove (9) is an arc-shaped groove structure with two ends extending to the bottom surfaces of the inner thrust plate (5) and the outer thrust plate (6); the lubricating oil groove (8) and the oil drain groove (9) are arranged in parallel, and the end surfaces of the opposite ends of the inner thrust plate (5) and the outer thrust plate (6) are provided with an oil hole (13) for connecting the lubricating oil groove (8) and the oil drain groove (9), and the end of the crankshaft (1) is located on the inner side of the limiting convex edge (4) and is narrowed to provide a clearance groove (26).

2. A rectangular groove type crankshaft thrust device according to claim 1, It is characterized in that The inner thrust plate (5) is provided with a connecting hole (14) connected to the outer thrust plate (6); the outer side of the outer thrust plate (6) is provided with an annular oil seal seat (15) connected to the flywheel housing (2); and the hole wall of the annular oil seal seat (15) is provided with an oil seal (16) adapted to the outer cylindrical surface of the crankshaft (1).

3. A rectangular groove type crankshaft thrust device according to claim 2, It is characterized in that The cross section of the annular oil seal seat (15) is L-shaped. The annular oil seal seat (15) comprises a positioning cylinder (17) adapted to the center hole of the flywheel housing (2) and a positioning convex edge (18) protruding from the outer end of the positioning cylinder (17) and adapted to the end surface of the center hole of the flywheel housing (2). The inner end of the positioning cylinder (17) is provided with an arc-shaped connecting plate (19) connected to the outer thrust plate (6). The oil seal (16) is mounted on the outer end of the positioning cylinder (17).

4. A rectangular groove type crankshaft thrust device according to claim 3, It is characterized in that A flywheel (20) is provided at the end of the crankshaft (1), and a connecting bolt (21) connected to the crankshaft (1) is provided on the flywheel (20). A signal tooth (22) is provided at the inner end of the flywheel (20), and a transition plate (23) is provided at the outer end of the flywheel housing (2).

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