Multi-power output device for engine

Abstract

The utility model discloses a multi-power output device for an engine, which comprises a transfer casing arranged on one side of an engine casing, a transfer gear, an idle gear and an output gear, the transfer gear, the idle gear and the output gear are rotatably arranged in the transfer casing, the transfer gear is arranged between an engine crankshaft and a flywheel and used for leading out power, and the idle gear is meshed with the transfer gear. The one or more output gears are each engaged with the idle gear. The dual-power output device is further provided with a pressure lubricating structure used for actively lubricating the rotating connection portions of the idle gear, the output gear and the transfer case shell, and the pressure lubricating structure comprises a pressure oil pipe communicated with an engine main oil way, an output wheel oil way and an idle wheel oil way, the output gear oil way is used for leading lubricating oil to the rotating connecting part of the output gear to lubricate the rotating connecting part, and the idle gear oil way is used for leading lubricating oil to the rotating connecting part of the idle gear to lubricate the rotating connecting part. According to the utility model, the technical problem that the bearing part is not fully lubricated in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine transmission equipment, and specifically relates to a multi-power output device for an engine. Background Art

[0002] In order to meet the requirements of multiple output interfaces, existing tractors and harvesters usually adopt a power take-off box arranged at the rear of the engine, and directly lead out multiple output interfaces from the crankshaft. However, most power take-off boxes only use splash lubrication or simply spray lubricating oil on the gears for lubrication, and the lubrication effect is poor, especially for the bearings at the rotating connection of the gears and the box body. Under harsh working conditions such as high speed and heavy load, the working efficiency and service life of the power take-off box are seriously affected.

[0003] For example, in the utility model patent with the application number 201922163434.4, the adopted lubrication method is that "the nozzle installed on the oil pipe weldment corresponds to the position between the idler gear and the main hydraulic pump gear, and the auxiliary hydraulic pump gear and the crankshaft gear are lubricated and cooled by splash to achieve the lubrication of the gear train". Only an oil nozzle is arranged at the meshing position of the main hydraulic pump gear and the idler gear, and the rest of the gears are lubricated by splash. Moreover, this lubrication method is more targeted at the gear meshing position, and the lubrication effect on the gear bearings is poor.

[0004] For example, in the utility model patent with the application number CN201910155734.X, the adopted lubrication method is that "oil is taken from the engine through an oil pipe and transported to the lubricating oil port, and the lubricating oil is sprayed onto the first hydraulic pump gear and the second hydraulic pump gear. The high-speed rotation of the first hydraulic pump gear and the second hydraulic pump gear makes the lubricating oil form splash lubrication, and at the same time, the bearings and the intermediate gears can also be lubricated". Although two oil injection ports are arranged in this way, it is still mainly targeted at lubricating the tooth surfaces, and the lubrication effect on the bearing part still depends on splash lubrication, and the lubrication effect is poor. Summary of the Invention

[0005] The purpose of the utility model is to provide a multi-power output device for an engine, and the device has a pressure lubrication structure for actively lubricating the gear bearing part, solving the technical problem of insufficient lubrication for the bearing part in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions.

[0007] A multi-power output device for an engine, comprising a transfer housing arranged on one side of the engine housing, a transfer gear, an idle gear, and an output gear rotatably arranged in the transfer housing. The transfer gear is arranged between the engine crankshaft and the flywheel to draw power, the idle gear meshes with the transfer gear, and one or more output gears all mesh with the idle gear. The multi-power output device is further provided with a pressure lubrication structure for actively lubricating the rotating connection parts of the idle gear, the output gear and the transfer housing. The pressure lubrication structure includes a pressure oil pipe communicating with the main oil path of the engine, an output wheel oil path and an idle wheel oil path arranged on the transfer housing body. The output wheel oil path is used to lead the lubricating oil in the pressure oil pipe to the rotating connection part of the output gear for lubricating it, and the idle wheel oil path is used to lead the lubricating oil in the pressure oil pipe to the rotating connection part of the idle gear for lubricating it.

[0008] Further, the idle gear is located above the transfer gear and meshes with the transfer gear, and two transfer gears respectively mesh with the idle gear.

[0009] Further, both ends of the output gear are rotatably connected to the transfer housing through bearings, and output wheel oil paths are provided at the output gears. The output wheel oil path includes a first oil passage arranged on the transfer housing for leading the lubricating oil in the pressure oil pipe to one end bearing of the output gear, a central oil passage arranged in the middle of the output gear for leading the lubricating oil at one end to the other end, and an inclined oil hole passing through the gear shaft wall for leading the lubricating oil in the central oil passage to the other end bearing of the output gear for lubricating it.

[0010] Further, the idle gear is rotatably arranged on the idle gear shaft of the transfer housing through a bearing. The idle wheel oil path includes a second oil passage arranged on the transfer housing and a journal oil passage arranged on the idle gear shaft. The lubricating oil in the pressure oil pipe is led to the bearing of the idle gear through the second oil passage and the journal oil passage for lubricating.

[0011] Further, an oil storage cavity for enhancing the lubrication of the gear tooth surfaces is also arranged at the bottom of the transfer housing. The lubricating oil stored in the oil storage cavity can immerse the lower end of the transfer gear, so as to make the tooth surfaces of the transfer gear covered with a lubricating oil layer during rotation, and be transmitted to the tooth surfaces of the idle gear and the output gear through tooth surface contact.

[0012] Further, the output gear is of an integral structure with a gear shaft, and both ends of the output gear are rotatably connected to the transfer housing through roller bearings.

[0013] Further, a spline for outputting power is arranged at one end of the output gear. The first oil passage leads the lubricating oil in the pressure oil pipe to the bearing at the end of the output gear away from the spline, and then the lubricating oil is led to the bearing at the end of the output gear close to the spline through the central oil passage and the inclined oil hole.

[0014] Further, the idle gear is rotatably arranged on the idle gear shaft through two juxtaposed roller bearings. One end of the journal oil passage communicates with the second oil passage, and the other end opening is located between the two roller bearings for uniformly lubricating the two bearings.

[0015] Further, an oil discharge groove is provided on the side wall of the oil storage cavity close to the engine for allowing the lubricating oil higher than the bottom of the oil discharge groove to flow into the engine oil sump through the oil discharge groove, so as to avoid excessive rotational resistance of the transfer gear.

[0016] Further, an openable oil drain hole is provided at the bottom of the oil storage cavity for discharging the lubricating oil in the oil storage cavity when replacing the lubricating oil.

[0017] After adopting the above technical solutions, the utility model has the following beneficial effects:

[0018] 1. The multi-power output device in the utility model takes power from between the rear end of the engine crankshaft and the engine flywheel by arranging a transfer gear, with a compact and reliable structure. It replaces the power take-off structure at the front end of the engine, reduces the eccentric force on the small end of the crankshaft, and effectively improves the reliability of the crankshaft.

[0019] 2. The utility model adopts a pressure lubrication structure to actively lubricate the gears. The lubricating oil first enters the bearing to lubricate the bearing and then falls onto the tooth surface to further lubricate the tooth surface. The lubricating amount is sufficient and stable. At the same time, the utility model is also provided with a splash lubrication structure to strengthen the lubrication of the tooth surface, with better effect.

[0020] 3. For the gear bearings, active lubrication is adopted. When the lubricating oil passes through the bearings, it can bring back the impurities generated during the operation of the bearings to the oil sump, strengthening the cleaning effect on the gears, being able to maintain a good working environment for the gears for a long time, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view structural schematic diagram of the utility model.

[0022] Figure 2 is the internal structural schematic diagram of the utility model.

[0023] Figure 3 is Figure 1 the sectional structural schematic diagram in the A-A direction of

[0024] Figure 4 is the enlarged structural schematic diagram of the partial lubrication structure of the idle gear (the pressure oil pipe is omitted).

[0025] Figure 5 is Figure 1 the sectional structural schematic diagram in the B-B direction of

[0026] Description of the drawings: 1. Power splitting housing, 11. Oil storage chamber, 12. Oil discharge groove, 13. Oil drain hole, 2. Power splitting gear, 3. Idler gear, 31. Idler shaft, 4. Output gear, 41. Spline, 5. Pressure oil pipe, 51. Adapter, 61. First oil passage, 62. Central oil passage, 63. Oblique oil hole, 71. Second oil passage, 72. Journal oil passage, 81. Crankshaft, 82. Flywheel. Detailed implementation mode

[0027] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the features and performance of a multi-power output device for an engine in the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0028] Embodiment 1

[0029] Please refer to the attached Figures 1 to 5 , a multi-power output device for an engine, including a power splitting housing 1 provided on one side of the engine housing and a power splitting gear 2, an idler gear 3, and an output gear 4 rotatably provided in the power splitting housing 1.

[0030] Among them, the power splitting gear 2 is provided between the engine crankshaft 81 and the flywheel 82 for extracting power, the idler gear 3 meshes with the power splitting gear 2, and one or more output gears 4 all mesh with the idler gear 3. In particular, in order to reasonably arrange the box structure, the idler gear 3 is located above the power splitting gear 2 and meshes with the power splitting gear 2. Preferably, the multi-power output device in this embodiment is provided with two output gears 4.

[0031] The multi-power output device is also provided with a pressure lubrication structure for actively lubricating the rotating connection parts of the idler gear 3, the output gear 4 and the power splitting housing 1.

[0032] The pressure lubrication structure includes a pressure oil pipe 5 communicating with the main oil circuit of the engine and an output gear oil circuit and an idler gear oil circuit provided on the power splitting box. The output gear oil circuit is used to lead the lubricating oil in the pressure oil pipe 5 to the rotating connection part of the output gear 4 for lubricating it, and the idler gear oil circuit is used to lead the lubricating oil in the pressure oil pipe 5 to the rotating connection part of the idler gear 3 for lubricating it.

[0033] The output gear 4 is a gear shaft integrated structure and one end is provided with a spline 41 for outputting power. Both ends of the output gear 4 are rotatably connected to the transfer case 1 through roller bearings. Output wheel oil circuits are provided at both output gears 4. The output wheel oil circuits include a first oil passage 61 provided on the transfer case 1 for guiding the lubricating oil in the pressure oil pipe 5 to the bearing at one end of the output gear 4 away from the spline 41, a central oil passage 62 provided in the middle of the output gear 4 for guiding the lubricating oil at one end to the other end, and an inclined oil hole 63 passing through the gear shaft wall for guiding the lubricating oil in the central oil passage 62 to the bearing at one end of the output gear 4 close to the spline 41 for lubrication. In particular, in order to ensure the lubrication effect, a plurality of inclined oil holes 63 are evenly provided in the circumferential direction.

[0034] The idler gear 3 is rotatably arranged on the idler shaft 31 through two parallel roller bearings. The idler oil circuit includes a second oil passage 71 arranged on the transfer case 1 and a journal oil passage 72 arranged on the idler shaft 31. One end of the journal oil passage 72 is connected to the second oil passage 71, and the other end opening is located between the two roller bearings. The lubricating oil in the pressure oil pipe 5 is led to the area between the two bearings of the idler gear 3 through the second oil passage 71 and the journal oil passage 72, and the two bearings are evenly lubricated. In particular, in order to ensure that the lubricating oil can smoothly enter the bearings, a separation gasket is provided between the two parallel bearings, and radial oil guide grooves are evenly arranged along the circumferential direction on the separation gasket located between the inner rings of the two bearings, and the oil guide grooves on both sides are arranged at intervals.

[0035] An oil storage chamber 11 for enhancing the lubrication of the gear tooth surfaces is also provided at the bottom of the transfer housing 1. The lubricating oil stored in the oil storage chamber 11 can immerse the lower end of the transfer gear 2, so that the tooth surface of the transfer gear 2 is covered with a lubricating oil layer when the transfer gear 2 rotates, and is transferred to the tooth surfaces of the idler gear 3 and the output gear 4 through tooth surface contact.

[0036] The oil storage chamber 11 is provided with an oil discharge groove 12 on the side wall close to the engine, so as to allow the lubricating oil above the bottom of the oil discharge groove 12 to flow into the engine oil pan through the oil discharge groove 12 to avoid excessive rotation resistance of the transfer gear 2.

[0037] An openable oil drain hole 13 is provided at the bottom of the oil storage chamber 11 for draining the lubricating oil in the oil storage chamber 11 when the lubricating oil is replaced.

[0038] In specific implementation, when the engine is running, the crankshaft 81 drives the transfer gear 2 and the flywheel 82 to rotate synchronously. The power drawn from the crankshaft by the transfer gear 2 is transmitted to the two transfer gears 4 through the idler gear 3. The transfer gears 4 are provided with splines 41 for outputting power. The two output interfaces correspond to the two output gears 4 respectively, and the external device is connected to the output gears 4 through the splines 41 to obtain power.

[0039] One end of the pressure oil pipe 5 is connected to the main oil circuit of the engine to obtain the lubricating oil from the engine lubricating oil pump, and the other end is communicated with the output wheel oil circuit and the idle wheel oil circuit to send the lubricating oil to the corresponding bearings for lubrication.

[0040] The inlets of the first oil passage 61 and the second oil passage 71 are communicated with the pressure oil pipe 5 through the adapter 51. The lubricating oil enters the first oil passage 61 and reaches the bearing at the end of the output gear 4 away from the spline 41. Part of the lubricating oil enters the bearing for lubrication, and the other part passes through the central oil passage 62 and the inclined oil hole 63 to reach the bearing at the end of the output gear 4 close to the spline 41 for lubrication. After the lubricating oil enters the second oil passage 71, it reaches between the two juxtaposed bearings through the journal oil passage 72, and the lubricating oil enters the two bearings through the oil guiding grooves on the separating gasket for lubrication.

[0041] Since the lubricating oil is continuously pumped to the bearings, the lubricating oil entering the bearings falls back to the bottom of the transfer case 1 under the action of gravity after passing through the bearings. The lubricating oil continuously passing through the bearings can carry out impurities such as metal powder generated by the operation of the bearings, maintaining a good working environment for the bearings. During the falling process of the lubricating oil, it contacts the tooth surfaces of the gears, and at the same time realizes the lubrication of the tooth surfaces.

[0042] When the transfer gear 2 rotates, when its lower end passes through the oil storage cavity 11, it can be covered with lubricating oil on the tooth surface and transfer it to the tooth surface of the idle gear 3 when meshing with the idle gear 3. The idle gear 3 then transfers the lubricating oil to the tooth surface of the output gear 4 when meshing with the two output gears 4, strengthening the lubrication of the tooth surface.

[0043] The side of the oil storage cavity 11 is communicated with the engine oil sump through the oil discharge groove 12, and the lubricating oil entering the transfer case 1 through the pressure oil pipe 5 finally falls into the oil storage cavity 11. When the oil level in the oil storage cavity 11 is higher than the bottom of the oil discharge groove 12, it can return to the engine oil sump through the oil discharge groove 12, preventing the rotation resistance of the transfer gear 2 from being too large due to too high an oil level, and at the same time returning the lubricating oil to the engine oil sump for cleaning through the oil filter.

[0044] Embodiment Two

[0045] Different from Embodiment One, in this embodiment, only one output gear is provided, making the overall structure more compact and suitable for scenarios that only require one output interface.

[0046] It should be noted that the parts not described in detail in this solution are all prior arts. The above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention all fall within the protection scope of the present invention.

Claims

1. A multi-power output device for an engine, comprising a transfer case (1) provided on one side of the engine housing, a transfer gear (2), an idle gear (3), and an output gear (4) rotatably provided in the transfer case (1). The transfer gear (2) is provided between the engine crankshaft (81) and the flywheel (82) for extracting power. The idle gear (3) meshes with the transfer gear (2), and one or more output gears (4) all mesh with the idle gear (3). It is characterized in that: A pressure lubrication structure is also provided for actively lubricating the rotating connection part between the idler gear (3), the output gear (4) and the transfer case (1). The pressure lubrication structure comprises a pressure oil pipe (5) connected to the main oil circuit of the engine and an output wheel oil circuit and an idler wheel oil circuit provided on the transfer case. The output wheel oil circuit is used to guide the lubricating oil in the pressure oil pipe (5) to the rotating connection part of the output gear (4) for lubrication, and the idler wheel oil circuit is used to guide the lubricating oil in the pressure oil pipe (5) to the rotating connection part of the idler gear (3) for lubrication.

2. The multi-power output device for an engine according to claim 1, characterized in that: The idler gear (3) is located above the transfer gear (2) and meshes with the transfer gear (2).

3. The multi-power output device for an engine according to claim 1, wherein: Both ends of the output gear (4) are rotatably connected to the transfer case (1) via bearings. An output gear oil circuit is provided at each of the output gears (4). The output gear oil circuit comprises a first oil passage (61) provided on the transfer case (1) for guiding lubricating oil in the pressure oil pipe (5) to a bearing at one end of the output gear (4), a central oil passage (62) provided in the middle of the output gear (4) for guiding lubricating oil at one end to the other end, and an inclined oil hole (63) passing through the gear shaft wall for guiding lubricating oil in the central oil passage (62) to the bearing at the other end of the output gear (4) for lubricating the bearing.

4. The multi-power output device for an engine according to claim 1, wherein: The idler gear (3) is rotatably arranged on an idler shaft (31) of the transfer case (1) via a bearing, the idler oil circuit comprises a second oil passage (71) arranged on the transfer case (1) and a journal oil passage (72) arranged on the idler shaft (31), and lubricating oil in the pressure oil pipe (5) is led to the idler gear (3) bearing through the second oil passage (71) and the journal oil passage (72) for lubrication.

5. The multi-power output device for an engine according to claim 2, characterized in that: The bottom of the transfer housing (1) is also provided with an oil storage chamber (11) for enhancing lubrication of the gear tooth surfaces. The lubricating oil stored in the oil storage chamber (11) can immerse the lower end of the transfer gear (2) so that the tooth surfaces of the transfer gear (2) are covered with a lubricating oil layer when the transfer gear (2) rotates, and the lubricating oil is transmitted to the tooth surfaces of the idler gear (3) and the output gear (4) through tooth surface contact.

6. The multi-power output device for an engine according to claim 3, wherein: The output gear (4) is a gear shaft integrated structure, and both ends of the output gear (4) are rotationally connected to the transfer case (1) via roller bearings.

7. The multi-power output device for an engine according to claim 6, wherein: A spline (41) for outputting power is provided at one end of the output gear (4). The first oil passage (61) guides lubricating oil in the pressure oil pipe (5) to a bearing at an end of the output gear (4) away from the spline (41), and then guides the lubricating oil to a bearing at an end of the output gear (4) close to the spline (41) through the central oil passage (62) and the oblique oil hole (63).

8. The multi-power output device for an engine according to claim 4, wherein: The idler gear (3) is rotatably mounted on the idler gear shaft (31) via two parallel roller bearings; one end of the journal oil passage (72) is connected to the second oil passage (71) and the opening at the other end is located between the two roller bearings for evenly lubricating the two bearings.

9. The multi-power output device for an engine according to claim 5, wherein: The oil storage chamber (11) is provided with an oil discharge groove (12) on a side wall close to the engine, so as to allow lubricating oil that exceeds the bottom of the oil discharge groove (12) to flow into the engine oil pan through the oil discharge groove (12), thereby preventing the transfer gear (2) from having excessive rotation resistance.

10. The multi-power output device for an engine according to claim 9, characterized in that: An openable oil drain hole (13) is provided at the bottom of the oil storage chamber (11) for draining the lubricating oil in the oil storage chamber (11) when the lubricating oil is replaced.

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