Engine gear transmission system with double-side power output device

Abstract

The utility model relates to an engine gear transmission system with a bilateral power output device. The engine gear transmission system comprises a crankshaft gear, a camshaft gear, an idle gear assembly, a fuel pump gear, a power takeoff assembly, a gear chamber and bolts, wherein the crankshaft gear is used as a driving wheel of an engine gear transmission system; the camshaft gear is simultaneously used as a driven wheel and an idle wheel of an engine gear transmission system; the idle gear assembly is used as an idle gear of an engine gear transmission system; the fuel pump gear is used as a driven wheel of an engine gear transmission system; the power takeoff assembly comprises a first power takeoff assembly and a second power takeoff The first power takeoff assembly is used as a driven wheel of an engine gear transmission system; and the second power takeoff assembly is used as a driven wheel of an engine gear transmission system. According to the utility model, more interface choices are provided for the installation of a hydraulic system of the whole vehicle; arrangement of whole vehicle equipment is facilitated; the transmission efficiency is improved; and the requirement of large bearing capacity is met.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an engine gear transmission system with double-side power output devices. Background Art

[0002] Power take-off (PTO), also known as a power take-off, is a device that outputs the engine's power to equipment other than the vehicle or construction machinery's driving system (such as power steering, air compressor, hydraulic lifting mechanism, etc.). Commonly used power take-offs can be arranged in the engine's gear system or pulley system, and transmit the power output from the engine crankshaft to the corresponding equipment through gear transmission or belt transmission.

[0003] Gear transmission has a more compact structure and greater load-bearing capacity, and is reliable and has a long service life.

[0004] With the continuous expansion and iteration of construction machinery products, the application areas of non-road engines have gradually increased, which has put forward higher requirements on the number of power take-off ports and load-bearing capacity of engine power output devices. Therefore, the use of compact gear-driven power take-off devices with greater load-bearing capacity has gradually become a key function for engines to improve their competitiveness.

[0005] The advantages of the prior art are: the belt drive structure is simple and easy to manufacture and maintain.

[0006] The defects of the prior art are as follows:

[0007] 1. Since the belt drive requires a large layout space, it is only suitable for use in scenarios with large center distances.

[0008] 2. Due to the belt slippage during the working process of the belt transmission, it is not suitable for bearing large loads.

[0009] 3. Since the belt drive is prone to wear and loosening after long-term use, it needs to be replaced and adjusted regularly. Summary of the invention

[0010] In view of the above problems, the utility model provides an engine gear transmission system with a double-sided power output device, which aims to provide more interface options for the installation of the vehicle hydraulic system; facilitate the layout of the vehicle equipment; improve the transmission efficiency; and meet the demand for large load-bearing capacity.

[0011] In order to solve the above problems, the technical solution provided by the utility model is:

[0012] An engine gear transmission system with a double-sided power output device includes a crankshaft gear, a camshaft gear, an idler gear assembly, a fuel pump gear, a power take-off assembly, a gear chamber, and bolts; wherein:

[0013] The crankshaft gear is used as a driving wheel of the engine gear transmission system; the crankshaft gear is installed at the lower part of the gear chamber; the crankshaft gear is a spur gear;

[0014] The camshaft gear is used as a driven wheel and an idler wheel of the engine gear transmission system at the same time; the camshaft gear is installed at the upper left position of the crankshaft gear; the gear teeth of the camshaft gear mesh with the gear teeth of the crankshaft gear;

[0015] The idler gear assembly is used as an idler gear of the engine gear transmission system; the idler gear assembly is installed on the upper right of the crankshaft gear; the idler gear assembly is bolted to the gear chamber; the gear teeth of the idler gear assembly mesh with the gear teeth of the crankshaft gear;

[0016] The fuel pump gear is used as a driven gear of the engine gear transmission system; the fuel pump gear is installed at the lower left position of the camshaft gear; the fuel pump gear is a spur gear; the gear teeth of the fuel pump gear mesh with the gear teeth of the camshaft gear;

[0017] The power take-off assembly comprises a first power take-off assembly and a second power take-off assembly, wherein:

[0018] The first power take-off assembly is used as a driven wheel of the engine gear transmission system; the first power take-off assembly is installed on the upper left of the camshaft gear; the first power take-off assembly is bolted to the gear chamber; the gear teeth of the first power take-off assembly are meshed with the gear teeth of the camshaft gear;

[0019] The second power take-off assembly is used as a driven wheel of the engine gear transmission system; the second power take-off assembly is installed on the upper right of the idler gear assembly; the second power take-off assembly is bolted to the gear chamber; the gear teeth of the second power take-off assembly are meshed with the gear teeth of the idler gear assembly.

[0020] Preferably, the idler gear assembly comprises an idler gear, an idler gear shaft, an idler gear bearing, a retaining ring, a locking washer, and an O-ring, wherein:

[0021] The idle gear bearing is used to support the idle gear shaft; the inner ring of the idle gear bearing is installed with interference fit on the idle gear shaft; the outer ring of the idle gear bearing is installed with interference fit on the idle gear;

[0022] The retaining ring is used to limit the axial displacement of the idle gear; the retaining ring is installed inside the limiting groove of the idle gear;

[0023] The O-type sealing ring is used to seal the lubricating oil passage opening of the idle gear shaft; the O-type sealing ring is installed on the lubricating oil passage opening;

[0024] The bolt passes through the lock washer and the idler gear shaft, and then the idler gear assembly is installed on the gear housing.

[0025] Preferably, the power take-off assembly comprises a power take-off housing, a power take-off gear, a power take-off shaft, and a power take-off bearing, wherein:

[0026] The interior of the power take-off shaft is processed to be provided with a spline groove; the power take-off shaft is connected to the hydraulic equipment on the vehicle end through a spline; the power take-off gear is interference-mounted at one end of the power take-off shaft; the torque received by the power take-off gear is transmitted to the hydraulic equipment on the vehicle end through the power take-off shaft; the power take-off bearing is used to support the power take-off shaft; the inner ring of the power take-off bearing is interference-mounted with the other end of the power take-off shaft; the outer ring of the power take-off bearing is interference-mounted with the power take-off housing.

[0027] Preferably, the first power take-off assembly is an intake-side power take-off; the power transmission path of the first power take-off assembly is: power passes through the crankshaft gear, the camshaft gear, the power take-off gear of the first power take-off assembly, and the power take-off shaft of the first power take-off assembly in sequence.

[0028] Preferably, the second power take-off assembly is an exhaust side power take-off; the power transmission path of the second power take-off assembly is: power passes through the crankshaft gear, the idler gear, the power take-off gear of the second power take-off assembly, and the power take-off shaft of the second power take-off assembly in sequence.

[0029] Preferably, the gear chamber is used to provide protection for the crankshaft gear, the camshaft gear, the idler gear assembly, the fuel pump gear, and the power take-off assembly; the gear chamber wraps the crankshaft gear, the camshaft gear, the idler gear assembly, the fuel pump gear, and the power take-off assembly inside;

[0030] The gear chamber is provided with a first engine lubricating oil port and a second engine lubricating oil port; the interior of the gear chamber is provided with a lubrication channel; the lubrication channel provides lubrication for the first power take-off assembly, the second power take-off assembly and the idle gear assembly respectively.

[0031] Preferably, the lubricating oil path of the second power take-off assembly is: passing through the first engine lubricating oil passage, the lubricating passage, and the second power take-off assembly in sequence.

[0032] Preferably, the lubricating oil path of the first power take-off assembly is: passing through the second engine lubricating oil passage, the lubricating passage, and the first power take-off assembly in sequence.

[0033] Preferably, the lubricating oil path of the idler gear assembly is: passing through the first engine lubricating oil passage, the lubricating passage, and the idler gear assembly in sequence.

[0034] Compared with the prior art, the utility model has the following advantages:

[0035] 1. Since the utility model arranges a power take-off on the intake and exhaust sides of the engine, both can provide power output for steering assistance, equipment lifting, hydraulic system heat dissipation, etc. of engineering machinery, thereby providing more interface options for the installation of the vehicle hydraulic system.

[0036] 2. Since the power take-off of the utility model adopts gear transmission and is integrated in the gear system of the engine valve train, the structure is compact, which facilitates the layout of the vehicle equipment.

[0037] 3. Since each side of the utility model passes through only two gear pairs from the power output end to the power take-off, the transmission efficiency is high.

[0038] 4. Since the gear system of the utility model is supported by roller bearings, it can meet the demand for large load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic cross-sectional view of the components of the gear transmission system of a specific embodiment of the utility model;

[0040] Figure 2 It is a schematic perspective view of the composition of the idler gear assembly of a specific embodiment of the utility model;

[0041] Figure 3 A schematic cross-sectional view of the assembly structure of the idler gear assembly of a specific embodiment of the utility model

[0042] Figure 4 A schematic perspective view of the composition of a power take-off assembly according to a specific embodiment of the utility model;

[0043] Figure 5 It is a schematic cross-sectional view of the assembly structure of the power take-off assembly of a specific embodiment of the utility model;

[0044] Figure 6 It is a schematic diagram of a lubricating oil circuit of a gear transmission system according to a specific embodiment of the utility model.

[0045] Wherein: 100. crankshaft gear, 200. camshaft gear, 300. idler gear assembly, 400. fuel pump gear, 500. power take-off assembly, 600. gear chamber, 700. bolt, 501. first power take-off assembly, 502. second power take-off assembly, 310. idler gear, 320. idler gear shaft, 330. idler gear bearing, 340. retaining ring, 350. locking washer, 360. O-ring, 311. limit groove, 321. lubricating oil passage, 510. power take-off housing, 520. power take-off gear, 530. power take-off shaft, 540. power take-off bearing, 531. spline groove, 610. lubricating passage, 620. first engine lubricating oil passage, 630. second engine lubricating oil passage DETAILED DESCRIPTION

[0046] The present invention is further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0047] like Figure 1 As shown, the engine gear transmission system with a double-sided power output device includes a crankshaft gear 100, a camshaft gear 200, an idler gear assembly 300, a fuel pump gear 400, a power take-off assembly 500, a gear chamber 600, and a bolt 700; wherein:

[0048] The crankshaft gear 100 is used as a driving wheel of the engine gear transmission system; the crankshaft gear 100 is installed at the lower part of the gear chamber 600; the crankshaft gear 100 is a spur gear.

[0049] The camshaft gear 200 is used as a driven gear and an idler gear of the engine gear transmission system; the camshaft gear 200 is installed at the upper left position of the crankshaft gear 100; the camshaft gear 200 is a spur gear; the teeth of the camshaft gear 200 mesh with the teeth of the crankshaft gear 100.

[0050] The idler gear assembly 300 is used as an idler gear of the engine gear transmission system; the idler gear assembly 300 is installed on the upper right of the crankshaft gear 100; the idler gear assembly 300 is bolted to the gear chamber 600; the gear teeth of the idler gear assembly 300 mesh with the gear teeth of the crankshaft gear 100.

[0051] The fuel pump gear 400 is used as a driven gear of the engine gear transmission system; the fuel pump gear 400 is installed at the lower left position of the camshaft gear 200; the fuel pump gear 400 is a spur gear; the gear teeth of the fuel pump gear 400 mesh with the gear teeth of the camshaft gear 200.

[0052] The power take-off assembly 500 comprises a first power take-off assembly 501 and a second power take-off assembly 502, wherein:

[0053] The first power take-off assembly 501 is used as a driven wheel of the engine gear transmission system; the first power take-off assembly 501 is installed on the upper left of the camshaft gear 200; the first power take-off assembly 501 is bolted to the gear chamber 600; the gear teeth of the first power take-off assembly 501 mesh with the gear teeth of the camshaft gear 200.

[0054] The second power take-off assembly 502 is used as a driven wheel of the engine gear transmission system; the second power take-off assembly 502 is installed on the upper right side of the idler gear assembly 300; the second power take-off assembly 502 is bolted to the gear chamber 600; the gear teeth of the second power take-off assembly 502 mesh with the gear teeth of the idler gear assembly 300.

[0055] It should be noted that a camshaft gear 200 is added between the crankshaft gear 100 and the first power take-off assembly 501 on the upper left as an idler gear to increase the transmission distance.

[0056] It should be further explained that an idler gear assembly 300 is added between the crankshaft gear 100 and the second power take-off assembly 502 on the upper right side as an idler gear for increasing the transmission distance.

[0057] It should be noted that, while the camshaft gear 200 receives power from the crankshaft gear 100 to drive the camshaft gear 200 to rotate, it also serves as an idler gear on the intake side.

[0058] like Figure 2 , Figure 3 As shown, it should be noted that the idler gear assembly 300 includes an idler gear 310, an idler gear shaft 320, an idler gear bearing 330, a retaining ring 340, a locking washer 350, and an O-ring 360, wherein:

[0059] The idle gear bearing 330 is used to support the idle gear shaft 320 ; the inner ring of the idle gear bearing 330 is installed with an interference fit on the idle gear shaft 320 ; and the outer ring of the idle gear bearing 330 is installed with an interference fit on the idle gear 310 .

[0060] The retaining ring 340 is used to limit the axial displacement of the idle gear 310 ; the retaining ring 340 is installed inside the limiting groove 311 of the idle gear 310 .

[0061] The O-ring 360 is used to seal the lubricating oil passage 321 of the idle gear shaft 320 ; the O-ring 360 is installed on the lubricating oil passage 321 .

[0062] The bolt 700 passes through the lock washer 350 and the idler gear shaft 320 , and then the idler gear assembly 300 is installed on the gear housing 600 .

[0063] It should be further explained that the idler gear assembly 300 is specifically used to serve as an idler gear on the exhaust side.

[0064] like Figure 4 , Figure 5 As shown, it should be noted that the power take-off assembly 500 includes a power take-off housing 510, a power take-off gear 520, a power take-off shaft 530, and a power take-off bearing 540, wherein:

[0065] The interior of the power take-off shaft 530 is processed to be provided with a spline groove 531; the power take-off shaft 530 is connected to the hydraulic equipment on the vehicle end through a spline; the power take-off gear 520 is interference-fitted on one end of the power take-off shaft 530; the torque received by the power take-off gear 520 is transmitted to the hydraulic equipment on the vehicle end through the power take-off shaft 530; the power take-off bearing 540 is used to support the power take-off shaft 530; the inner ring of the power take-off bearing 540 is interference-fitted with the other end of the power take-off shaft 530; the outer ring of the power take-off bearing 540 is interference-fitted with the power take-off housing 510.

[0066] It should be further explained that the torque received by the power take-off gear 520 is transmitted to the rear-end equipment through the power take-off shaft 530 .

[0067] It should be further explained that the bolt 700 passes through the power take-off housing 510 to install the power take-off assembly 500 on the gear chamber 600 .

[0068] It should be noted that the first power take-off assembly 501 is an intake-side power take-off; the power transmission path of the first power take-off assembly 501 is: the power passes through the crankshaft gear 100, the camshaft gear 200, the power take-off gear 520 of the first power take-off assembly 501, and the power take-off shaft 530 of the first power take-off assembly 501 in sequence.

[0069] It should be noted that the second power take-off assembly 502 is an exhaust side power take-off; the power transmission path of the second power take-off assembly 502 is: the power passes through the crankshaft gear 100, the idle gear 310, the power take-off gear 520 of the second power take-off assembly 502, and the power take-off shaft 530 of the second power take-off assembly 502 in sequence.

[0070] It should be further explained that the first power take-off assembly 501 and the second power take-off assembly 502 are combined with the crankshaft gear 100, the camshaft gear 200, and the idler gear assembly 300 to form a gear transmission system.

[0071] It should be further explained that, by forming a set of gear transmission system, the power output by the engine crankshaft is transmitted to the first power take-off assembly 501 and the second power take-off assembly 502. Through the internal shaft system of the first power take-off assembly 501 and the second power take-off assembly 502, the power is output to the hydraulic system of the whole vehicle.

[0072] It should be noted that the gear chamber 600 is used to provide protection for the crankshaft gear 100, the camshaft gear 200, the idler gear assembly 300, the fuel pump gear 400, and the power take-off assembly 500; the gear chamber 600 wraps the crankshaft gear 100, the camshaft gear 200, the idler gear assembly 300, the fuel pump gear 400, and the power take-off assembly 500 inside.

[0073] like Figure 6 As shown, it needs to be further explained that an oil passage is provided inside the gear chamber 600 to introduce the oil in the engine cylinder into the gear chamber 600 to provide lubrication for the gear system of the present invention.

[0074] It should be further explained that the gear chamber 600 is provided with a first engine lubricating oil passage 620 and a second engine lubricating oil passage 630; a lubrication passage 610 is provided inside the gear chamber 600; the lubrication passage 610 provides lubrication for the first power take-off assembly 501, the second power take-off assembly 502 and the idle gear assembly 300 respectively.

[0075] It should be further explained that a gear chamber 600 is used to provide an installation position and a lubricating oil circuit for the gear system of the present invention.

[0076] It should be further explained that the lubricating oil path of the second power take-off assembly 502 is: passing through the first engine lubricating oil passage 620, the lubricating passage 610, and the second power take-off assembly 502 in sequence.

[0077] It should be further explained that the specific path of the lubricating oil circuit of the second power take-off assembly 502 on the exhaust side is: passing through path a, path b, path c, path d, path e, path f, and path g in sequence.

[0078] It should be further explained that the lubricating oil path of the first power take-off assembly 501 is: passing through the second engine lubricating oil passage 630, the lubricating passage 610, and the first power take-off assembly 501 in sequence.

[0079] It should be further explained that the specific path of the lubricating oil circuit of the first power take-off assembly 501 on the air intake side is: passing through path j, path k, path l, path m, path n, and path o in sequence.

[0080] It should be further explained that the lubricating oil path of the idler gear assembly 300 is: passing through the first engine lubricating oil passage 620, the lubricating passage 610, and the idler gear assembly 300 in sequence.

[0081] It should be further explained that the specific path of the lubricating oil circuit of the idler gear assembly 300 is: passing through path a, path h, and path i in sequence.

[0082] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0083] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0084] The above description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0085] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An engine gear transmission system with a double-sided power output device, characterized in that: It comprises a crankshaft gear (100), a camshaft gear (200), an idler gear assembly (300), a fuel pump gear (400), a power take-off assembly (500), a gear chamber (600), and bolts (700); wherein: The crankshaft gear (100) is used as a driving wheel of the engine gear transmission system; the crankshaft gear (100) is installed at the lower part of the gear chamber (600); the crankshaft gear (100) is a spur gear; The camshaft gear (200) is used as a driven wheel and an idler wheel of the engine gear transmission system; the camshaft gear (200) is installed at the upper left position of the crankshaft gear (100); the camshaft gear (200) is a spur gear; the gear teeth of the camshaft gear (200) mesh with the gear teeth of the crankshaft gear (100); The idler gear assembly (300) is used as an idler gear of the engine gear transmission system; the idler gear assembly (300) is installed on the upper right of the crankshaft gear (100); the idler gear assembly (300) is bolted to the gear chamber (600); the gear teeth of the idler gear assembly (300) mesh with the gear teeth of the crankshaft gear (100); The fuel pump gear (400) is used as a driven gear of the engine gear transmission system; the fuel pump gear (400) is installed at the lower left position of the camshaft gear (200); the fuel pump gear (400) is a spur gear; the gear teeth of the fuel pump gear (400) mesh with the gear teeth of the camshaft gear (200); The power take-off assembly (500) comprises a first power take-off assembly (501) and a second power take-off assembly (502), wherein: The first power take-off assembly (501) is used as a driven wheel of the engine gear transmission system; the first power take-off assembly (501) is installed on the upper left of the camshaft gear (200); the first power take-off assembly (501) is bolted to the gear chamber (600); the gear teeth of the first power take-off assembly (501) are meshed with the gear teeth of the camshaft gear (200); The second power take-off assembly (502) is used as a driven wheel of the engine gear transmission system; the second power take-off assembly (502) is installed on the upper right of the idler gear assembly (300); the second power take-off assembly (502) is bolted to the gear chamber (600); the gear teeth of the second power take-off assembly (502) are meshed with the gear teeth of the idler gear assembly (300).

2. The engine gear transmission system with double-sided power output device according to claim 1, characterized in that: The idler gear assembly (300) comprises an idler gear (310), an idler gear shaft (320), an idler gear bearing (330), a retaining ring (340), a locking washer (350), and an O-ring (360), wherein: The idle gear bearing (330) is used to support the idle gear shaft (320); the inner ring of the idle gear bearing (330) is installed in an interference fit with the idle gear shaft (320); and the outer ring of the idle gear bearing (330) is installed in an interference fit with the idle gear (310); The retaining ring (340) is used to limit the axial displacement of the idle gear (310); the retaining ring (340) is installed inside the limiting groove (311) of the idle gear (310); The O-type sealing ring (360) is used to seal the lubricating oil passage (321) of the idle gear shaft (320); the O-type sealing ring (360) is installed on the lubricating oil passage (321); The bolt (700) passes through the locking washer (350) and the idler gear shaft (320), and then the idler gear assembly (300) is installed on the gear housing (600).

3. The engine gear transmission system with double-sided power output device according to claim 2, characterized in that: The power take-off assembly (500) comprises a power take-off housing (510), a power take-off gear (520), a power take-off shaft (530), and a power take-off bearing (540), wherein: The interior of the power take-off shaft (530) is provided with a spline groove (531) through processing; the power take-off shaft (530) is connected to the hydraulic equipment at the vehicle end through a spline; the power take-off gear (520) is interference-mounted on one end of the power take-off shaft (530); the torque received by the power take-off gear (520) is transmitted to the hydraulic equipment at the vehicle end through the power take-off shaft (530); the power take-off bearing (540) is used to support the power take-off shaft (530); the inner ring of the power take-off bearing (540) is interference-mounted with the other end of the power take-off shaft (530); the outer ring of the power take-off bearing (540) is interference-mounted with the power take-off housing (510).

4. The engine gear transmission system with double-sided power output device according to claim 3, characterized in that: The first power take-off assembly (501) is an intake-side power take-off; the power transmission path of the first power take-off assembly (501) is: the power passes through the crankshaft gear (100), the camshaft gear (200), the power take-off gear (520) of the first power take-off assembly (501), and the power take-off shaft (530) of the first power take-off assembly (501) in sequence.

5. The engine gear transmission system with double-sided power output device according to claim 4, characterized in that: The second power take-off assembly (502) is an exhaust-side power take-off; the power transmission path of the second power take-off assembly (502) is: the power passes through the crankshaft gear (100), the idler gear (310), the power take-off gear (520) of the second power take-off assembly (502), and the power take-off shaft (530) of the second power take-off assembly (502) in sequence.

6. The engine gear transmission system with double-sided power output device according to claim 5, characterized in that: The gear chamber (600) is used to provide protection for the crankshaft gear (100), the camshaft gear (200), the idler gear assembly (300), the fuel pump gear (400), and the power take-off assembly (500); the gear chamber (600) wraps the crankshaft gear (100), the camshaft gear (200), the idler gear assembly (300), the fuel pump gear (400), and the power take-off assembly (500) inside; The gear chamber (600) is provided with a first engine lubricating oil passage (620) and a second engine lubricating oil passage (630); a lubricating passage (610) is provided inside the gear chamber (600); the lubricating passage (610) provides lubrication for the first power take-off assembly (501), the second power take-off assembly (502) and the idler gear assembly (300), respectively.

7. The engine gear transmission system with double-sided power output device according to claim 6, characterized in that: The lubricating oil path of the second power take-off assembly (502) passes through the first engine lubricating oil passage (620), the lubricating passage (610), and the second power take-off assembly (502) in sequence.

8. The engine gear transmission system with double-sided power output device according to claim 7, characterized in that: The lubricating oil path of the first power take-off assembly (501) passes through the second engine lubricating oil passage (630), the lubricating passage (610), and the first power take-off assembly (501) in sequence.

9. The engine gear transmission system with double-sided power output device according to claim 8, characterized in that: The lubricating oil path of the idler gear assembly (300) passes through the first engine lubricating oil passage (620), the lubricating passage (610), and the idler gear assembly (300) in sequence.

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