An engine and an engine gear train thereof

Abstract

This utility model discloses an engine and its gear system. The engine gear system includes a crankshaft gear, an idler gear, a double gear A, a double gear B, an oil pump gear, a camshaft gear, and a fuel injection pump gear. The crankshaft gear is fixedly mounted on the crankshaft. The double gear A includes a first gear and a second gear, and the double gear B includes a first gear and a second gear. The idler gear meshes with both the crankshaft gear and the first gear of the double gear A. The first gear of the double gear A meshes with both the first gear of the double gear B and the oil pump gear. The second gear of the double gear A meshes with the camshaft gear, and the second gear of the double gear B meshes with the fuel injection pump gear. Through the rational and effective arrangement of the engine gear system within the gearbox, the side space of the engine block can be utilized efficiently, reducing the overall length of the engine block and making the engine structure more compact.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to an engine and its gear system. Background Technology

[0002] In existing technology, the fuel injection pump gear, freshwater pump gear, oil pump gear, and seawater pump gear are arranged at the free end of the diesel engine and driven by the crankshaft gear located in the center. The crankshaft gear is mounted on the crankshaft, and the crankshaft and gearbox are mounted on the engine block. The fuel injection pump, freshwater pump, oil pump, and seawater pump are all mounted on the same side of the gearbox. Because the fuel injection pump, oil pump, and water pump are arranged on the same side, and because the overall structure of the fuel injection pump is relatively long, the overall length of the engine increases, and the space on the side of the engine block is not effectively utilized. Utility Model Content

[0003] To overcome the above-mentioned defects, the first technical problem solved by this utility model is to provide an engine gear system. By rationally and effectively arranging the engine gear system inside the gearbox, the side space of the engine body can be rationally utilized, the overall length of the engine body can be reduced, and the structure of the engine can be made more compact.

[0004] To solve the above-mentioned technical problems, this utility model provides an engine gear system, including a crankshaft gear, an idler gear, a double gear A, a double gear B, an oil pump gear, a camshaft gear, and an injection pump gear; the crankshaft gear is fixedly mounted on the crankshaft; the double gear A includes a first gear and a second gear, the double gear B includes a first gear and a second gear, the idler gear meshes with both the crankshaft gear and the first gear of the double gear A, the first gear of the double gear A meshes with both the first gear of the double gear B and the oil pump gear, the second gear of the double gear A meshes with the camshaft gear, and the second gear of the double gear B meshes with the injection pump gear.

[0005] Furthermore, the diameter of the first gear of the double gear A is larger than the diameter of the second gear of the double gear A.

[0006] Furthermore, the diameter of the first gear of the double gear B is smaller than the diameter of the second gear of the double gear B.

[0007] Furthermore, the idler wheel is mounted on an idler wheel shaft, the idler wheel shaft including an idler wheel mounting portion, and a flange portion is provided at one end of the idler wheel mounting portion.

[0008] Furthermore, a cover plate is provided at the other end of the idler wheel mounting portion, and the cover plate is fixedly connected to the flange portion to clamp the idler wheel.

[0009] Furthermore, the double gear A is mounted on the double gear shaft A, which is a pin; the double gear B is mounted on the double gear shaft B, which is a pin.

[0010] Furthermore, the idler gear is located above the crankshaft gear.

[0011] Furthermore, the oil pump gear is located above the first gear of the double gear A.

[0012] Furthermore, the camshaft gear is located above the second gear of the double gear A.

[0013] Based on a general inventive concept, the second technical problem to be solved by this utility model is to provide an engine in which the engine gear system is rationally and effectively arranged inside the gearbox, thereby making reasonable use of the side space of the engine body, reducing the overall length of the engine body, and making the engine structure more compact.

[0014] An engine includes a body, on which a gearbox is disposed, and the gearbox is provided with an engine gear system as described above.

[0015] The beneficial effects of this utility model after adopting the above technical solution are as follows: the engine gear system includes a crankshaft gear, an idler gear, a double gear A, a double gear B, an oil pump gear, a camshaft gear, and an injection pump gear. The crankshaft gear is fixedly mounted on the crankshaft; double gear A includes a first gear and a second gear, and double gear B includes a first gear and a second gear. The idler gear meshes with both the crankshaft gear and the first gear of double gear A. The first gear of double gear A meshes with both the first gear of double gear B and the oil pump gear. The second gear of double gear A meshes with the camshaft gear, and the second gear of double gear B meshes with the injection pump gear. Through the rational and effective arrangement of the engine gear system within the gearbox, the side space of the engine body can be utilized efficiently, reducing the overall length of the engine body and making the engine structure more compact. Attached Figure Description

[0016] Figure 1 This is a perspective view of the engine gear system of this utility model;

[0017] Figure 2 This is a schematic diagram of the engine gear system of this utility model;

[0018] Figure 3 This is a partial structural schematic diagram of the engine of this utility model;

[0019] Figure 4 yes Figure 3 A partial structural schematic diagram of the top view;

[0020] Figure 5 This is a schematic diagram of the installation structure of the idler gear in the engine gear system of this utility model;

[0021] Figure 6 yes Figure 5 3D view of the idler wheel shaft;

[0022] Figure 7 yes Figure 3 Schematic diagram of the installation structure of the double gear A;

[0023] In the diagram, the arrows indicate the direction of lubricant flow;

[0024] In the diagram, 1. Crankshaft gear; 2. Idler gear; 3. Double gear A; 31. First gear of double gear A; 32. Second gear of double gear A; 4. Double gear B; 41. First gear of double gear B; 42. Second gear of double gear B; 5. Oil pump gear; 6. Camshaft gear; 7. Fuel injection pump gear; 8. Double gear shaft A; 9. Idler shaft; 91. Idler mounting part; 92. Flange part; 10. Engine body; 11. Cover plate; 12. Gearbox; 13. Oil pump; 14. Double gear shaft B; 15. Fuel injection pump; 16. Baffle. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Combination Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, an engine includes a body 10, a gearbox 12 disposed on the body 10, and an engine gear system disposed within the gearbox 12.

[0027] Combination Figure 1 as well as Figure 2 As shown, the engine gear system includes crankshaft gear 1, idler gear 2, double gear A3, double gear B4, oil pump gear 5, camshaft gear 6, and fuel injection pump gear 7.

[0028] Crankshaft gear 1 is fixedly mounted on the crankshaft.

[0029] The double gear A3 includes a first gear 31 and a second gear 32 of the double gear A, and the double gear B4 includes a first gear 41 and a second gear 42 of the double gear B. The idler gear 2 meshes with the crankshaft gear 1 and the first gear 31 of the double gear A. The first gear 31 of the double gear A meshes with the first gear 41 of the double gear B and the oil pump gear 5. The second gear 32 of the double gear A meshes with the camshaft gear 6, and the second gear 42 of the double gear B meshes with the fuel injection pump gear 7.

[0030] Preferably, the diameter of the first gear 31 of the double gear A is larger than the diameter of the second gear 32 of the double gear A.

[0031] Preferably, the diameter of the first gear 41 of the double gear B is smaller than the diameter of the second gear 42 of the double gear B.

[0032] Preferably, the idler gear 2 is located above the crankshaft gear 1.

[0033] The oil pump gear 5 is located above the first gear 31 of the double gear A.

[0034] Camshaft gear 6 is located above the second gear 32 of double gear A.

[0035] Combination Figure 1 , Figure 2 , Figure 4 , Figure 5 as well as Figure 6 As shown, the idler wheel 2 is rotatably mounted on the idler wheel shaft 9. Specifically, the idler wheel shaft 9 includes an idler wheel mounting part 91, on which the idler wheel 2 is rotatably mounted. A flange part 92 is provided at one end of the idler wheel mounting part 91. The idler wheel shaft 9 is fixedly connected to the machine body 10 through the flange part 92.

[0036] Preferably, a cover plate 11 is provided at the other end of the idler wheel mounting part 91, and the cover plate 11 is fixedly connected to the flange part 92 to clamp the idler wheel 2. After the idler wheel 2 is installed on the idler wheel mounting part 91, the cover plate 11 is put on and the cover plate 11 is fixedly connected to the flange part 92 with bolts.

[0037] Combination Figure 1 , Figure 2 as well as Figure 7 As shown, the double gear A3 is rotatably mounted on the double gear shaft A8, which is a pin. Two opposing thrust surfaces are machined on the machine body 10. The double gear A3 is rotatably positioned between the two thrust surfaces. The double gear shaft A8 passes through both the double gear A3 and the two thrust surfaces, and a baffle 16 is provided on the double gear shaft A8 to prevent the double gear A3 from moving erratically.

[0038] The double gear B4 is rotatably mounted on the double gear shaft B14, which is a pin. The installation method of the double gear B4 is the same as that of the double gear A3, and will not be described again here.

[0039] Combination Figure 3 as well as Figure 4 As shown, the oil pump 13 and the fuel injection pump 15 are arranged opposite each other, and the oil pump 13 and the fuel injection pump 15 are arranged on both sides of the engine body 10. Compared with the structure in the prior art where the oil pump 13 and the fuel injection pump 15 are arranged on the same side, the space can be effectively utilized and the overall length of the engine body 10 can be shortened.

[0040] The technical features with serial numbers mentioned in this manual (double gear A, double gear A first gear, double gear A second gear, double gear B, double gear B first gear, double gear B second gear, double gear shaft A, double gear shaft B, etc.) are only for distinguishing each technical feature and do not represent the positional relationship, installation sequence, or working sequence of the technical features.

[0041] In the description of this specification, it should be understood that the orientation or positional relationship described by terms such as "above" and "inside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] This utility model is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort shall fall within the protection scope of this utility model.

Claims

1. An engine gear train, characterized by, The system includes a crankshaft gear (1), an idler gear (2), a double gear A (3), a double gear B (4), an oil pump gear (5), a camshaft gear (6), and an injection pump gear (7). The crankshaft gear (1) is fixedly mounted on the crankshaft. The double gear A (3) includes a first gear (31) and a second gear (32). The double gear B (4) includes a first gear (41) and a second gear (42). The idler gear (2) meshes with both the crankshaft gear (1) and the first gear (31) of the double gear A. The first gear (31) of the double gear A meshes with both the first gear (41) of the double gear B and the oil pump gear (5). The second gear (32) of the double gear A meshes with the camshaft gear (6). The second gear (42) of the double gear B meshes with the injection pump gear (7).

2. The engine gear train of claim 1, wherein, The diameter of the first gear (31) of the double gear A is larger than the diameter of the second gear (32) of the double gear A.

3. The engine gear train of claim 1, wherein, The diameter of the first gear (41) of the double gear B is smaller than the diameter of the second gear (42) of the double gear B.

4. The engine gear system as described in claim 3, characterized in that, The idler wheel (2) is mounted on the idler wheel shaft (9), which includes an idler wheel mounting part (91) and a flange part (92) is provided at one end of the idler wheel mounting part (91).

5. The engine gear train of claim 4, wherein, The other end of the idler wheel mounting part (91) is provided with a cover plate (11), which is fixedly connected to the flange part (92) to clamp the idler wheel (2).

6. The engine gear train of claim 1, wherein, The double gear A (3) is mounted on the double gear shaft A (8), which is a pin shaft; the double gear B (4) is mounted on the double gear shaft B (14), which is a pin shaft.

7. The engine gear train of claim 1, wherein, The idler wheel (2) is located above the crankshaft gear (1).

8. The engine gear system as described in claim 1, characterized in that, The oil pump gear (5) is located above the first gear (31) of the double gear A.

9. The engine gear system as described in claim 1, characterized in that, The camshaft gear (6) is located above the second gear (32) of the double gear A.

10. An engine comprising a body (10) on which a gearbox (12) is disposed, characterized in that, The gearbox (12) is provided with an engine gear system as described in any one of claims 1 to 9.

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