Gear chamber and engine

Abstract

The application provides a gear chamber and an engine, and relates to the technical field of engines.The engine body is provided with a main oil passage, and the gear chamber comprises a gear chamber shell, a gear chamber cover connected with the gear chamber shell and the engine body and located at one end of the gear chamber shell away from the engine body, a central gear shaft arranged in the gear chamber shell and connected with the gear chamber cover and the engine body at two ends, an output oil passage arranged in the central gear shaft and extending along the axial direction of the central gear shaft, one end of the output oil passage being communicated with the main oil passage, and at least one lubricating oil passage arranged on the gear chamber cover, the other end of the output oil passage being communicated with one end of the at least one lubricating oil passage, and the other end of the at least one lubricating oil passage being connected with a gear transmission mechanism and / or a chain transmission mechanism in the gear chamber shell to provide lubricating oil for the gear transmission mechanism and / or the chain transmission mechanism.The application solves the technical problem that the engine body oil passage arrangement is difficult in the prior art, which leads to the difficulty in meeting the oil supply requirements of various systems.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more specifically, to a gear chamber and an engine. Background Technology

[0002] Currently, engine lubrication circuit design typically relies on constructing a sophisticated network of oil channels within the engine block to ensure adequate lubrication of all critical components such as gears, chains, and related moving parts. This effectively supports the normal operation of the engine and extends its service life.

[0003] However, with the continuous advancement of engine technology, especially in diesel engine design, the front-end area has become a densely packed area for various functional components, including water pump inlets, cooling system interfaces, and electrical equipment. This compact layout poses a significant challenge to the arrangement of lubrication circuits. Traditional oil passage design methods, constrained by extreme space limitations, struggle to construct oil passages in the front-end engine that effectively cover critical components such as gear drives and chain drives without affecting the layout of other systems. This directly leads to difficulties in oil passage arrangement, preventing lubricating oil from smoothly reaching all parts requiring lubrication, thus affecting the overall operating efficiency of the engine and the coordinated operation of its components. Summary of the Invention

[0004] The main objective of this invention is to provide a gear chamber and an engine to solve the technical problem in the prior art where the oil circuit layout of the engine body is difficult, resulting in difficulty in meeting the oil supply requirements of various systems.

[0005] To achieve the above objectives, according to one aspect of the present invention, a gear chamber is provided for connection to the engine body, the engine body having a main oil passage. The gear chamber includes: a gear chamber housing; a gear chamber cover connected to the gear chamber housing and the engine body and located at one end of the gear chamber housing opposite to the engine body; a central gear shaft disposed within the gear chamber housing, with both ends connected to the gear chamber cover and the engine body respectively, and an output oil passage extending along its axial direction disposed within the central gear shaft, one end of the output oil passage communicating with the main oil passage; and at least one lubricating oil passage disposed on the gear chamber cover, the other end of the output oil passage communicating with one end of the at least one lubricating oil passage, the other end of the at least one lubricating oil passage being connected to a gear transmission mechanism and / or a chain transmission mechanism within the gear chamber housing, so that lubricating oil flows from the main oil passage through the output oil passage and through the at least one lubricating oil passage to the gear transmission mechanism and / or the chain transmission mechanism.

[0006] Furthermore, the gear chamber also includes: a flange cover plate, a through hole provided on the gear chamber cover, the flange cover plate passing through the through hole, the central gear shaft being connected to the flange cover plate, a first oil groove being provided on the outer peripheral wall of the flange cover plate along its circumferential direction, a second oil groove being provided on the wall of the through hole along its circumferential direction, the first oil groove and the second oil groove forming a transition oil cavity, the output oil passage communicating with the transition oil cavity, and at least one lubricating oil passage communicating with the transition oil cavity.

[0007] Furthermore, a first oil passage extending along its axial direction is provided inside the flange cover plate, and at least two second oil passages extending along its radial direction and spaced apart from each other are provided inside the flange cover plate. One end of the first oil passage is connected to the output oil passage, and the other end of the first oil passage is connected to one end of the at least two second oil passages. The other ends of the at least two second oil passages are respectively connected to the first oil tank.

[0008] Furthermore, at least one lubrication passage includes: a first lubrication passage and a second lubrication passage, one end of the first lubrication passage and the second lubrication passage being connected to the transition oil chamber respectively, the other end of the first lubrication passage being used to provide lubricating oil to the oil pump in the gear chamber housing and the intermediate idler shaft meshing with the gear of the oil pump, and the other end of the second lubrication passage being used to provide lubricating oil to the tensioner in the gear chamber housing.

[0009] Furthermore, the gear chamber also includes a third oil passage and a first oil hole, which are disposed on the gear chamber cover. The third oil passage is connected to the first lubricating oil passage, one end of the first oil hole is connected to the third oil passage, and the other end of the first oil hole is connected to the oil pump inside the gear chamber housing.

[0010] Furthermore, the gear chamber also includes: a fourth oil passage, a second oil hole, and a sleeve. The fourth oil passage and the second oil hole are disposed on the gear chamber cover. One end of the fourth oil passage is connected to the first lubricating oil passage, and one end of the second oil hole is connected to the fourth oil passage. The sleeve is disposed inside the gear chamber housing. Both ends of the sleeve are connected to the gear chamber cover and the intermediate idler shaft, respectively. The other end of the second oil hole is connected to the sleeve, so that lubricating oil flows from the second oil hole through the sleeve to the intermediate idler shaft.

[0011] Furthermore, the gear chamber also includes two oil sprayers disposed on the gear chamber cover. The two oil sprayers are respectively connected to the second lubricating oil passage. The oil sprayers include nozzles that are disposed facing the chain drive mechanism inside the gear chamber for spraying lubricating oil onto the chain drive mechanism.

[0012] Furthermore, the oil spraying component includes: a mounting part disposed on the gear chamber cover, the mounting part having a first channel communicating with the second lubricating oil passage; an adjusting part rotatably connected to the mounting part, the adjusting part having a second channel communicating with the first channel, and a nozzle orifice located on the adjusting part and communicating with the second channel; wherein, the adjusting part is provided with an alignment mark, the gear chamber cover is provided with a reference mark, and the alignment mark is used to align with the reference mark.

[0013] Furthermore, a sprocket bushing is provided inside the gear chamber housing. The sprocket bushing is fitted onto a portion of the central gear shaft. A fifth oil passage is provided on the central gear shaft, extending radially therein. The fifth oil passage is connected to the output oil passage, so that the lubricating oil in the output oil passage flows into the gap between the central gear shaft and the sprocket bushing through the fifth oil passage.

[0014] According to another aspect of the invention, an engine is provided, including the gear chamber mentioned above.

[0015] According to one aspect of the technical solution of the present invention, a gear chamber is provided for connection to the engine body. The engine body is provided with a main oil passage. The gear chamber includes a gear chamber housing, a gear chamber cover, a central gear shaft, and at least one lubricating oil passage. The gear chamber cover is connected to the gear chamber housing and the engine body and is located at one end of the gear chamber housing away from the engine body. The central gear shaft is disposed in the gear chamber housing, and its two ends are respectively connected to the gear chamber cover and the engine body. An output oil passage extending along its axial direction is disposed in the central gear shaft, and one end of the output oil passage is connected to the main oil passage. At least one lubricating oil passage is disposed on the gear chamber cover, and the other end of the output oil passage is connected to one end of the at least one lubricating oil passage. The other end of the at least one lubricating oil passage is connected to a gear transmission mechanism and / or a chain transmission mechanism in the gear chamber housing, so that lubricating oil flows from the main oil passage through the output oil passage and through the at least one lubricating oil passage to the gear transmission mechanism and / or the chain transmission mechanism.

[0016] In this application, the central gear shaft is embedded in the gear chamber housing, with its two ends connected to the gear chamber cover and the machine body, respectively. An output oil passage extending along the axial direction is provided inside. One end of the output oil passage is directly connected to the main oil passage on the machine body, and the other end is connected to the lubrication oil passage on the gear chamber cover, acting as a bridge for transporting lubricating oil from the main oil passage to various lubrication points.

[0017] By connecting the output oil passage inside the central gear shaft with at least one lubrication oil passage on the gear chamber cover, the limitations of the engine block's oil circuit layout are effectively overcome. This ensures that lubricating oil can flow smoothly to other systems such as the gear transmission mechanism and chain transmission mechanism, achieving sufficient lubrication for all systems even in the extremely limited space of the engine front end. Since the delivery of lubricating oil no longer relies entirely on the internal oil passages of the engine block, the gear chamber cover and the central gear shaft jointly undertake the function of oil circuit distribution. This significantly reduces the design complexity of individual parts, especially the oil passages on the engine block, simplifying the overall engine oil circuit system and reducing manufacturing costs and assembly difficulty. This solves the technical problem in existing technologies where the engine block's oil circuit layout is difficult, leading to difficulties in meeting the oil supply needs of various systems. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 A cross-sectional view from a first perspective is shown, according to an embodiment of the gear chamber of the present invention;

[0020] Figure 2 A cross-sectional view from a second perspective is shown, provided by an embodiment of the gear chamber according to the invention;

[0021] Figure 3 A partial sectional view of an embodiment of the gear chamber according to the present invention is shown;

[0022] Figure 4 A schematic diagram of the structure of the oil injection component provided in an embodiment of the gear chamber according to the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 1. Main body; 2. Gear chamber housing; 3. Sprocket bushing;

[0025] 10. Central gear shaft; 11. Output oil passage; 12. Fifth oil passage;

[0026] 20. Gear chamber cover; 21. Through hole; 210. Second oil groove; 22. Third oil passage; 23. First oil hole; 24. Fourth oil passage; 25. Second oil hole; 26. Sleeve; 27. Intermediate idler shaft; 28. Oil spray component; 280. Nozzle orifice; 281. Mounting part; 282. First channel; 283. Adjustment part; 284. Second channel; 285. Alignment mark; 29. ​​Connecting oil passage; 290. First connecting section;

[0027] 30. Flange cover plate; 31. First oil tank; 32. First oil passage; 33. Second oil passage;

[0028] 40. First lubricating oil passage; 41. Second lubricating oil passage. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To address the technical problem of difficult oil circuit layout in existing engines, which makes it difficult to meet the oil supply needs of various systems, this invention provides a gear chamber and an engine.

[0031] Please refer to Figures 1 to 4As shown, one aspect of the technical solution of the present invention provides a gear chamber for connection to the engine body 1. The engine body 1 is provided with a main oil passage. The gear chamber includes a gear chamber housing 2, a gear chamber cover 20, a central gear shaft 10, and at least one lubricating oil passage. The gear chamber cover 20 is connected to the gear chamber housing 2 and the engine body 1 and is located at one end of the gear chamber housing 2 away from the engine body 1. The central gear shaft 10 is disposed inside the gear chamber housing 2, and both ends of the central gear shaft 10 are respectively connected to the gear chamber cover 20 and the engine body 1. An output oil passage 11 extending along its axial direction is disposed inside the central gear shaft 10, and one end of the output oil passage 11 is connected to the main oil passage. At least one lubricating oil passage is disposed on the gear chamber cover 20, and the other end of the output oil passage 11 is connected to one end of the at least one lubricating oil passage. The other end of the at least one lubricating oil passage is connected to a gear transmission mechanism and / or a chain transmission mechanism inside the gear chamber housing 2, so that lubricating oil flows from the main oil passage through the output oil passage 11 and through at least one lubricating oil passage to the gear transmission mechanism and / or the chain transmission mechanism.

[0032] In this application, the central gear shaft 10 is embedded in the gear chamber housing 2, with its two ends connected to the gear chamber cover 20 and the machine body 1, respectively. An output oil passage 11 extending along the axial direction is provided inside. One end of the output oil passage 11 is directly connected to the main oil passage on the machine body 1, and the other end is connected to the lubricating oil passage on the gear chamber cover 20, serving as a bridge for transporting lubricating oil from the main oil passage to various lubrication points.

[0033] By connecting the output oil passage 11 inside the central gear shaft 10 with at least one lubrication oil passage on the gear chamber cover 20, the limitations of the oil circuit layout in the engine block 1 are effectively overcome. This ensures that lubricating oil can flow smoothly to other systems such as the gear transmission mechanism and chain transmission mechanism, achieving sufficient lubrication for all systems even in the extremely limited space of the engine front end. Since the delivery of lubricating oil no longer relies entirely on the oil passages inside the engine block 1, the gear chamber cover 20 and the central gear shaft 10 jointly undertake the function of oil circuit distribution. This significantly reduces the design complexity of individual parts, especially the oil passages on the engine block 1, simplifying the overall engine oil circuit system and reducing manufacturing costs and assembly difficulty. This solves the technical problem in the prior art where the oil circuit layout in the engine block 1 is difficult, leading to difficulties in meeting the oil supply needs of various systems.

[0034] Furthermore, through precise distribution and efficient flow of lubricating oil, not only can wear on gears and chains be effectively reduced, but local temperatures can also be lowered by carrying away heat, preventing overheating and thus significantly improving the stability of the transmission system and the overall lifespan of the engine. This not only optimizes the oil circuit layout but also makes reasonable use of the internal space of the gear chamber cover 20 and the central gear shaft 10, making the oil circuit design more flexible, eliminating excessive reliance on a single oil passage in the engine block 1, better adapting to the high integration requirements of the engine, and effectively saving valuable internal engine space.

[0035] In this embodiment, the gear chamber cover 20 is connected to the gear chamber housing 2 and the machine body 1 by fasteners such as bolts, forming a closed oil circuit distribution space.

[0036] In this embodiment, the gear chamber also includes a flange cover plate 30. A through hole 21 is provided on the gear chamber cover 20. The flange cover plate 30 passes through the through hole 21. The central gear shaft 10 is connected to the flange cover plate 30. A first oil groove 31 is provided on the outer peripheral wall of the flange cover plate 30 along its circumferential direction. A second oil groove 210 is provided on the hole wall of the through hole 21 along its circumferential direction. The first oil groove 31 and the second oil groove 210 form a transition oil cavity. The output oil passage 11 communicates with the transition oil cavity. At least one lubricating oil passage communicates with the transition oil cavity.

[0037] By directly connecting the output oil passage 11 to the transition oil chamber, and then connecting the transition oil chamber to at least one lubrication oil passage, a continuous and smooth lubrication oil transmission path is formed. This not only ensures that the lubrication oil is accurately distributed from the central gear shaft 10 to each lubrication oil passage on the gear chamber cover 20, but also significantly improves the distribution efficiency of the lubrication oil, ensuring sufficient lubrication of each moving part.

[0038] The transition oil chamber formed by the first oil groove 31 and the second oil groove 210 provides greater flexibility in the arrangement of lubrication channels. Whether it is a gear transmission mechanism or a chain transmission mechanism, multi-directional and multi-angle lubrication can be achieved with the help of this transition oil chamber. Especially in the space-constrained front end area of ​​the engine, it greatly simplifies the layout of the oil circuit and improves the convenience of overall assembly.

[0039] Furthermore, the efficient delivery of lubricating oil through the transition oil chamber not only provides sufficient lubrication for gears and chains, reducing wear, but also effectively removes the heat generated by friction, preventing localized overheating. This improves the stability of the transmission system and the working efficiency of the engine, extending its service life.

[0040] It is evident that by connecting the flange cover plate 30 with the through hole 21 and the central gear shaft 10, not only is the problem of lubrication circuit layout in the prior art solved, but also the reliability and maintainability of the engine gear chamber are significantly improved by enhancing the continuity of the oil circuit, improving the sealing performance, and optimizing heat management, which helps to improve the overall performance of the engine and extend its life.

[0041] In this embodiment, a first oil passage 32 extending along its axial direction is provided inside the flange cover plate 30, and at least two second oil passages 33 extending along its radial direction and spaced apart from each other are provided inside the flange cover plate 30. One end of the first oil passage 32 is connected to the output oil passage 11, and the other end of the first oil passage 32 is connected to one end of at least two second oil passages 33. The other ends of at least two second oil passages 33 are respectively connected to the first oil tank 31.

[0042] The first oil passage 32 is directly connected to the output oil passage 11 of the central gear shaft 10, ensuring that lubricating oil can be quickly and unimpededly transferred from the main oil passage to the flange cover plate 30. The arrangement of the second oil passage 33, especially its radial distribution, increases the flow path of the lubricating oil, allowing it to be more evenly distributed to all parts of the first oil groove 31. This effectively improves the distribution efficiency of the lubricating oil in the transition oil chamber, ensuring comprehensive lubrication of the gear transmission mechanism and the chain transmission mechanism. Furthermore, the combined design of the first oil passage 32 and the second oil passage 33 not only enhances the distribution efficiency and coverage of the lubricating oil but also optimizes the oil circuit layout, improving the system's sealing performance and ease of maintenance.

[0043] In this embodiment, at least one lubrication channel includes a first lubrication channel 40 and a second lubrication channel 41. One end of the first lubrication channel 40 and the second lubrication channel 41 are respectively connected to the transition oil chamber. The other end of the first lubrication channel 40 is used to provide lubricating oil to the oil pump in the gear chamber housing 2 and the intermediate idler shaft 27 that meshes with the gear of the oil pump. The other end of the second lubrication channel 41 is used to provide lubricating oil to the tensioner in the gear chamber housing 2.

[0044] Different lubrication channels 40 and 41 provide specific lubrication to different points. The first lubrication channel 40 is specifically responsible for the lubrication of the oil pump and the intermediate idler shaft 27, ensuring that these two key components maintain a low friction state under high-speed operation and improving transmission efficiency; while the second lubrication channel 41 ensures that the tensioner is adequately lubricated, ensuring its function of automatically adjusting chain tension and maintaining the stability of chain transmission.

[0045] By refining and specifying the purpose of oil passages, the design complexity and potential leakage risks associated with a single oil passage needing to accommodate multiple lubrication points are avoided. This layout not only simplifies oil circuit design but also reduces energy loss of lubricating oil during transmission, improving the overall efficiency of the oil circuit system. Therefore, this application not only improves lubricating oil distribution efficiency and system response speed but also simplifies oil circuit layout, reduces maintenance difficulty, and contributes to improving the operating efficiency of the engine gear chamber.

[0046] Furthermore, the separate design of the first lubrication channel 40 and the second lubrication channel 41 facilitates regular inspection and maintenance of the lubrication system. When a lubrication problem occurs in a component, the corresponding lubrication channel can be quickly located for targeted troubleshooting and repair, reducing maintenance costs and downtime.

[0047] Because each lubrication channel has a specific lubrication target, the lubricating oil can reach the designated components more quickly, forming an effective oil film, reducing friction and heat generation, and improving the system's response speed. At the same time, the stable oil flow ensures continuous lubrication of the oil pump, intermediate idler shaft 27, and tensioner, avoiding wear and malfunctions caused by poor lubrication and improving the overall stability of the transmission system.

[0048] In this embodiment, the gear chamber also includes a third oil passage 22 and a first oil hole 23. The third oil passage 22 and the first oil hole 23 are disposed on the gear chamber cover 20. The third oil passage 22 is connected to the first lubricating oil passage 40. One end of the first oil hole 23 is connected to the third oil passage 22, and the other end of the first oil hole 23 is connected to the oil pump in the gear chamber housing 2.

[0049] The inclusion of the third oil passage 22 and the first oil hole 23 significantly shortens the path of lubricating oil to the oil pump, reduces energy loss during transmission, and ensures timely and sufficient lubrication of the oil pump and its related gear system, thereby improving lubrication efficiency and ultimately enhancing the pump's operating efficiency and reliability. Furthermore, the lubricating oil flows directly and accurately to the designated lubrication points on the pump, avoiding unnecessary flow in complex oil circuits, achieving precise lubrication distribution, reducing the possibility of insufficient or excessive lubrication, and extending the service life of the oil pump and gear system. This simplifies the complexity of the oil circuit system, reduces the need for additional oil passages in the gear chamber housing 2, and thus lowers the manufacturing and maintenance costs of the oil circuit system.

[0050] The lubricating oil, transmitted through the third oil passage 22 and the first oil hole 23, not only provides lubrication but also effectively removes the heat generated by the oil pump during operation, preventing local overheating, protecting the oil pump and gear system from heat damage, and extending their service life.

[0051] In this embodiment, the gear chamber further includes a fourth oil passage 24, a second oil hole 25, and a sleeve 26. The fourth oil passage 24 and the second oil hole 25 are disposed on the gear chamber cover 20. One end of the fourth oil passage 24 is connected to the first lubricating oil passage 40, and one end of the second oil hole 25 is connected to the fourth oil passage 24. The sleeve 26 is disposed inside the gear chamber housing 2. Both ends of the sleeve 26 are connected to the gear chamber cover 20 and the intermediate idler shaft 27, respectively. The other end of the second oil hole 25 is connected to the sleeve 26, so that lubricating oil flows from the second oil hole 25 through the sleeve 26 to the intermediate idler shaft 27.

[0052] The sleeve 26 has two ends that are respectively connected to the gear chamber cover 20 and the intermediate idler shaft 27, and both ends are sealed with rubber rings. It passes through the gear chamber housing 2 with a large gap, realizing oil transmission across components. The intermediate idler shaft 27 distributes lubricating oil to the inner side of the bushing through the oil passages in the holes located on it and the cross oil passages, thereby lubricating the gear shaft bushing of the oil pump, preventing wear, and extending service life.

[0053] Through the directional delivery of the fourth oil passage 24, the second oil hole 25, and the sleeve 26, the lubricating oil can directly and fully cover the contact surface between the intermediate idler shaft 27 and the bushing, forming a stable oil film. This reduces friction and wear between the two, significantly improving the lubrication effect and transmission stability of the intermediate idler shaft 27. This not only simplifies the complexity of the oil circuit system but also reduces the high-precision requirements for the position of the intermediate gear shaft hole, decreases assembly difficulty and potential installation errors, accelerates assembly speed, and improves production efficiency.

[0054] The use of sleeve 26 not only ensures precise delivery of lubricating oil but also effectively prevents leakage during transmission, improving the sealing and reliability of the entire lubrication system, reducing lubricating oil waste, and lowering maintenance costs. It also allows for more flexible oil circuit design, ensuring effective lubricating oil distribution even under complex spatial constraints, while facilitating potential subsequent improvements or adjustments to the oil circuit. Therefore, the synergistic effect of the fourth oil passage 24, the second oil hole 25, and sleeve 26 not only improves the lubrication efficiency of the intermediate idler shaft 27 and simplifies the assembly process but also enhances the sealing and reliability of the lubrication system.

[0055] In this embodiment, there are two first lubrication channels 40. One channel provides lubricating oil to the left oil pump in the gear chamber housing 2 and the intermediate idler shaft 27 that meshes with the gear of the left oil pump to prevent wear. The other channel provides lubricating oil to the right oil pump in the gear chamber housing 2 and the intermediate idler shaft 27 that meshes with the gear of the right oil pump to prevent wear.

[0056] In this embodiment, the gear chamber also includes two oil sprayers 28, which are disposed on the gear chamber cover 20. The two oil sprayers 28 are respectively connected to the second lubrication oil passage 41. The oil sprayer 28 includes a nozzle 280, which is disposed toward the chain drive mechanism inside the gear chamber for spraying lubricating oil onto the chain drive mechanism.

[0057] Since the V-type machine has camshafts on both sides, two sets of timing chain drives are required. By installing two oil sprayers 28, with the nozzles 280 of the oil sprayers 28 directly facing the chain drive mechanism, the nozzles 280 are aligned with the timing chain, ensuring the spray direction and achieving effective lubrication. An oil film is formed between the high-speed rotating components, reducing direct wear between metal parts. Furthermore, the lubricating oil can carry away heat through its flow, preventing problems such as localized overheating and extending the service life of the rotating components. In addition, the oil sprayers 28 are threaded onto the gear chamber cover 20.

[0058] At the same time, it avoids the problem that lubricating oil may not be able to reach the chain contact surface in traditional lubrication methods, thus improving lubrication efficiency and reducing wear on the chain and sprocket.

[0059] Compared to traditional lubrication methods, the use of nozzles reduces the need for large oil tanks or oil pipes, simplifies the oil circuit layout in the gear chamber, and optimizes space utilization, which helps to achieve a lightweight and compact engine design.

[0060] Optionally, the oil spraying component 28 can be equipped with a multi-hole spray to avoid the problem of multiple assembly alignments.

[0061] In this embodiment, the oil spraying component 28 includes a mounting part 281 and an adjusting part 283. The mounting part 281 is disposed on the gear chamber cover 20, and a first channel 282 communicating with the second lubricating oil passage 41 is provided in the mounting part 281. The adjusting part 283 is rotatably connected to the mounting part 281, and a second channel 284 communicating with the first channel 282 is provided in the adjusting part 283. The nozzle orifice 280 is located on the adjusting part 283 and communicates with the second channel 284. The adjusting part 283 is provided with an alignment mark 285, and the gear chamber cover 20 is provided with a reference mark. The alignment mark 285 is used to align with the reference mark.

[0062] Precise alignment of the alignment line 285 with the reference line ensures that the nozzle is accurately directed towards critical lubrication points in the chain drive mechanism, such as the meshing point between the chain and sprocket. This design allows for precise control of the lubricant spray direction and angle, effectively improving lubrication efficiency, reducing wear and friction in the chain drive mechanism, and extending its service life.

[0063] The rotatable design of the adjustment section 283 allows the fuel injector 28 to be flexibly adjusted according to the specific position of the chain drive mechanism, ensuring that the nozzle spray angle is always optimal to meet the lubrication requirements of different engine layouts and chain drive mechanism positions. This feature improves the adaptability and ease of installation of the fuel injector 28 and reduces assembly difficulty.

[0064] By using alignment marks 285 and reference marks, assemblers can quickly and accurately position the spray nozzle 28 at the optimal spray angle, avoiding the tedious process of repeated alignment required in traditional assembly. This not only simplifies the assembly process but also significantly improves assembly accuracy, ensuring the accurate installation of the spray nozzle 28 on the chain drive mechanism.

[0065] It is evident that this design of the oil injection component 28 not only significantly improves the lubrication effect of the chain drive mechanism, but also simplifies the assembly and maintenance process, improves assembly accuracy, and helps to improve the operating efficiency of the engine gear chamber and extend its service life.

[0066] In this embodiment, there are two second lubrication channels 41, with one end of each channel interconnected. The gear chamber also includes a connecting oil channel 29, which is disposed on the gear chamber cover 20. One end of the connecting oil channel 29 communicates with the transition oil chamber, and the other end communicates with the connection point of the two second lubrication channels 41. The connecting oil channel 29 includes a first connecting section 290 and a second connecting section, which are arranged at an angle to each other. The two second lubrication channels 41 are used to provide lubricating oil to their respective tensioners, enabling the tensioners to automatically adjust the chain tension and ensure normal chain transmission.

[0067] By setting up two second lubrication channels 41 and connecting them with connecting channels 29, the lubricating oil can be distributed more evenly to different areas of the gear chamber, especially to the two independent chain drive mechanisms, ensuring that the entire transmission system receives balanced lubrication and avoiding the problem of insufficient local lubrication.

[0068] The design of the connecting oil passage 29 allows lubricating oil to be delivered directly and efficiently from the transition oil chamber to the connection point of the two second lubricating oil passages 41. The angle between the first connecting section 290 and the second connecting section allows the oil passage to flexibly adapt to the complex spatial layout on the gear chamber cover 20 without sacrificing lubrication.

[0069] The lubricating oil, transmitted through the first connecting section 290 and the second connecting section, can more effectively remove the heat generated in various parts of the gear chamber, especially the high temperature when the chain drive mechanism is working. This helps to maintain the engine within a suitable operating temperature range and prevents damage to components caused by overheating.

[0070] In this embodiment, a sprocket bushing 3 is provided inside the gear chamber housing 2. The sprocket bushing 3 is sleeved on a portion of the shaft section of the central gear shaft 10. A fifth oil passage 12 extending radially is provided on the central gear shaft 10. The fifth oil passage 12 is connected to the output oil passage 11 so that the lubricating oil in the output oil passage 11 flows into the gap between the central gear shaft 10 and the sprocket bushing 3 through the fifth oil passage 12.

[0071] The fifth oil passage 12 is directly connected to the output oil passage 11 on the central gear shaft 10, allowing lubricating oil to reach the contact area between the central gear shaft 10 and the sprocket bushing 3 directly through the radial oil passage. This design bypasses complex external oil circuits, ensures direct supply of lubricating oil, improves lubrication efficiency, reduces friction and wear, and significantly enhances the lubrication effect on the bushing.

[0072] The lubricating oil enters the bushing gap through the fifth oil passage 12, which not only provides the necessary lubrication, but also forms an effective cooling between the high-speed rotating sprocket and the bushing, which can carry away the heat generated during operation in time, prevent the material from softening or being damaged due to excessive temperature, and extend the service life of the central gear shaft 10 and the sprocket bushing 3.

[0073] As can be seen, the design of the fifth oil passage 12 directly utilizes the shaft of the central gear shaft 10 itself as the transmission channel for lubricating oil, reducing the need for external oil pipes and joints, simplifying the overall structure, reducing potential leakage risks, and improving the reliability and ease of maintenance of the system. It not only improves the lubrication effect between the central gear shaft 10 and the bushing, but also simplifies the structure and enhances the response speed and thermal management capabilities of the lubrication system.

[0074] According to another aspect of the invention, an engine is provided, including the gear chamber mentioned above.

[0075] The lubrication structure in the gear chamber of this application, namely the oil passage of the central gear shaft 10, the oil passage on the gear chamber cover 20, the oil injector 28, the sleeve 26, etc., facilitates the lubrication of the gear system and the timing chain drive system, ensures the formation of an oil film between high-speed rotating parts, reduces direct wear between metal parts, and the lubricating oil can carry away heat through flow, avoiding problems such as excessive local temperature, and extending the service life of the engine.

[0076] Furthermore, by integrating and optimizing the oil circuit, reliance on complex external oil pipes and connectors is reduced, thereby simplifying the engine structure and lowering assembly complexity and cost. In addition, this simplified design also helps improve engine cooling efficiency and reduces the impact of external factors on the lubrication system.

[0077] Because the gear chamber integrates an optimized lubrication system, including but not limited to the intermediate gear shaft oil passage, the gear chamber cover 20 oil passage, the annular oil groove of the flange cover 30, the oil nozzle, the sleeve 26, and the sprocket bushing 3, this design ensures that lubricating oil can reach all critical components, such as gears, chains, sprockets, and related bushings, via the shortest path and with the highest efficiency. This efficient lubrication mechanism reduces friction and wear, improving the overall operating efficiency of the engine.

[0078] It is evident that the engine employing the gear chamber design of this application not only improves lubrication efficiency and thermal management capabilities, but also extends service life, simplifies structure, and enhances operational safety.

[0079] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0080] The central gear shaft 10 is embedded within the gear chamber housing 2, with its two ends connected to the gear chamber cover 20 and the engine body 1, respectively. An output oil passage 11 extending axially is provided inside. One end of the output oil passage 11 connects directly to the main oil passage on the engine body 1, while the other end connects to the lubrication oil passage on the gear chamber cover 20, acting as a bridge for transporting lubricating oil from the main oil passage to various lubrication points. The connection between the output oil passage 11 inside the central gear shaft 10 and at least one lubrication oil passage on the gear chamber cover 20 effectively overcomes the limitations of the oil circuit layout in the engine body 1, ensuring that lubricating oil can flow smoothly to other systems such as the gear transmission mechanism and chain transmission mechanism. Even in the extremely limited space at the front end of the engine, sufficient lubrication of each system can be achieved. Since the delivery of lubricating oil no longer entirely depends on the oil passages inside the engine body 1, the gear chamber cover 20 and the central gear shaft 10 jointly undertake the function of oil circuit distribution. This significantly reduces the design complexity of individual parts, especially the oil passages on the engine body 1, simplifying the overall engine oil circuit system and reducing manufacturing costs and assembly difficulty. This solves the technical problem in the existing technology where the oil circuit layout of the engine body is difficult, making it difficult to meet the oil supply needs of various systems.

[0081] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0082] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0083] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0084] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0085] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A gear chamber for connection to an engine block (1), said engine block (1) having a main oil passage, characterized in that, The gear chamber includes: Gear chamber housing (2); Gear chamber cover (20) is connected to the gear chamber housing (2) and the body (1) and is located at one end of the gear chamber housing (2) away from the body (1); A central gear shaft (10) is disposed inside the gear chamber housing (2). Both ends of the central gear shaft (10) are connected to the gear chamber cover (20) and the machine body (1) respectively. An output oil passage (11) extending along its axial direction is provided inside the central gear shaft (10). One end of the output oil passage (11) is connected to the main oil passage. At least one lubricating oil passage is provided on the gear chamber cover (20), the other end of the output oil passage (11) is connected to one end of at least one of the lubricating oil passages, and the other end of at least one of the lubricating oil passages is connected to the gear transmission mechanism and / or the chain transmission mechanism in the gear chamber housing (2), so that lubricating oil flows from the main oil passage through the output oil passage (11) to the gear transmission mechanism and / or the chain transmission mechanism through at least one of the lubricating oil passages; A flange cover (30) is provided with a through hole (21) on the gear chamber cover (20). The flange cover (30) passes through the through hole (21). The central gear shaft (10) is connected to the flange cover (30). A first oil groove (31) is provided on the outer peripheral wall of the flange cover (30) along its circumferential direction. A second oil groove (210) is provided on the hole wall of the through hole (21) along its circumferential direction. The first oil groove (31) and the second oil groove (210) form a transition oil cavity. The output oil passage (11) is connected to the transition oil cavity. At least one of the lubricating oil passages is connected to the transition oil cavity. The flange cover plate (30) is provided with a first oil passage (32) extending along its axial direction, and the flange cover plate (30) is provided with at least two second oil passages (33) extending along its radial direction and spaced apart from each other. One end of the first oil passage (32) is connected to the output oil passage (11), and the other end of the first oil passage (32) is connected to one end of at least two second oil passages (33). The other ends of at least two second oil passages (33) are respectively connected to the first oil tank (31). The at least one lubricating oil passage includes: a first lubricating oil passage (40) and a second lubricating oil passage (41), one end of the first lubricating oil passage (40) and the second lubricating oil passage (41) are respectively connected to the transition oil chamber, the other end of the first lubricating oil passage (40) is used to supply the lubricating oil to the oil pump in the gear chamber housing (2) and the intermediate idler shaft (27) meshing with the gear of the oil pump, and the other end of the second lubricating oil passage (41) is used to supply lubricating oil to the tensioner in the gear chamber housing (2).

2. The gear chamber according to claim 1, characterized in that, The gear chamber also includes: The third oil passage (22) and the first oil hole (23) are provided on the gear chamber cover (20). The third oil passage (22) is connected to the first lubricating oil passage (40). One end of the first oil hole (23) is connected to the third oil passage (22), and the other end of the first oil hole (23) is connected to the oil pump in the gear chamber housing (2).

3. The gear chamber according to claim 1, characterized in that, The gear chamber also includes: The fourth oil passage (24), the second oil hole (25), and the sleeve (26) are provided on the gear chamber cover (20). One end of the fourth oil passage (24) is connected to the first lubricating oil passage (40), and one end of the second oil hole (25) is connected to the fourth oil passage (24). The sleeve (26) is provided inside the gear chamber housing (2). Both ends of the sleeve (26) are connected to the gear chamber cover (20) and the intermediate idler shaft (27), respectively. The other end of the second oil hole (25) is connected to the sleeve (26) so that the lubricating oil flows from the second oil hole (25) through the sleeve (26) to the intermediate idler shaft (27).

4. The gear chamber according to claim 1, characterized in that, The gear chamber also includes: Two oil spray elements (28) are disposed on the gear chamber cover (20). The two oil spray elements (28) are respectively connected to the second lubricating oil passage (41). The oil spray element (28) includes a nozzle (280) which is disposed toward the chain drive mechanism in the gear chamber for spraying the lubricating oil onto the chain drive mechanism.

5. The gear chamber according to claim 4, characterized in that, The oil spraying component (28) includes: The mounting part (281) is provided on the gear chamber cover (20), and the mounting part (281) is provided with a first channel (282) communicating with the second lubricating oil passage (41). An adjustment section (283) is rotatably connected to the mounting section (281). The adjustment section (283) is provided with a second channel (284) communicating with the first channel (282). The nozzle (280) is located on the adjustment section (283) and communicates with the second channel (284). The adjustment section (283) is provided with an alignment mark (285), and the gear chamber cover (20) is provided with a reference mark. The alignment mark (285) is used to align with the reference mark.

6. The gear chamber according to claim 1, characterized in that, A sprocket bushing (3) is provided inside the gear chamber housing (2). The sprocket bushing (3) is sleeved on a portion of the shaft section of the central gear shaft (10). A fifth oil passage (12) extending radially is provided on the central gear shaft (10). The fifth oil passage (12) is connected to the output oil passage (11) so that the lubricating oil in the output oil passage (11) flows into the gap between the central gear shaft (10) and the sprocket bushing (3) through the fifth oil passage (12).

7. An engine, characterized in that, The gear chamber includes any one of claims 1 to 6.

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