Oil distributor and reduction gearbox

Abstract

An oil distributor and a reduction gearbox, the oil distributor comprising a top surface and a bottom surface opposite one another, and a side surface located between the top surface and the bottom surface. The top surface, the bottom surface, and the side surface enclose to form an oil distribution cavity. An oil inlet hole is formed on the top surface, and the oil inlet hole is in communication with an oil inlet pipe on an external oil path. At least one oil outlet is formed on the side surface, and the oil outlet is in communication a lubricant pipe. The bottom surface is arranged at a through hole of a housing of a reduction gearbox, and the bottom surface is provided with an oil distribution pipe located inside of the housing of the reduction gearbox. At least one oil injection hole is formed on the oil distribution pipe, and the oil injection hole is in communication with the inside of the housing of the reduction gearbox. According to the present invention, the oil distributor provided with both an oil outlet and an oil distribution pipe is provided such that the oil distributor can not only convey lubricants into different lubricant pipes, but also directly inject lubricants to lubrication points in the reduction gearbox, thus reducing the number of oil conveying pipes in the reduction gearbox.

Description

Oil distributor and reduction gearbox

[0001] Cross-reference to related applications

[0002] This application claims priority to and the benefit of Chinese Patent Application No. 202421187892.6 filed May 28, 2024 in the China National Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by this reference. TECHNICAL FIELD

[0003] The present application relates to an oil distributor and a reduction gearbox, and belongs to the technical field of lubricating device manufacturing for reduction gearbox. BACKGROUND

[0004] The reduction gearbox is a transmission system of the fracturing equipment, and its function is to convert the power output by the engine through the different speed ratio change design of the internal gear of the reduction gearbox, so as to achieve the effect of speed reduction and torque increase or speed increase and torque reduction, so as to provide different transmission capacity for the fracturing equipment.

[0005] In the high-speed rotating motion of the reduction gearbox, a large amount of heat is generated in the narrow space of the gear and bearing, and if it is not removed in time, the internal transmission components will be overheated and appear problems such as pitting and gluing, which reduces the service life of the reduction gearbox or even directly scrapes it. The lubricating system needs to ensure that the lubricating oil is sent to the surface of the friction pair such as the gear and bearing in time to protect the friction pair from dry friction and remove heat. Therefore, the design of the lubricating system is very important for the continuous operation of the reduction gearbox.

[0006] The lubrication mode of the reduction gearbox includes splash (immersed oil) lubrication and forced lubrication. For high-speed reduction gearboxes, forced lubrication is often used, which establishes a certain oil pressure through an oil pump to guide oil to the surface of the friction pair, and the oil quantity can be determined according to the heat to be removed. However, forced lubrication needs to design an oil channel to guide oil, and the lubricating system is relatively complex and difficult to maintain.

[0007] The existing lubricating system of the reduction gearbox mainly consists of a lubricating oil circuit, a joint, an oil inlet structure, and a lubricating design part. Since the lubrication points (areas to be lubricated) are scattered and some are located inside the reduction gearbox, the current existing lubricating oil circuit often adopts the form of welding a pipeline inside the reduction gearbox to connect the external pipeline with the welding pipeline inside the housing to guide the lubricating oil to the lubrication point. Although this design is simple, the welding structure is prone to breakage due to continuous vibration and impact during the operation of the reduction gearbox, especially at the lubrication structure of the key parts such as the meshing part of the large and small gears. If the lubrication welding structure at this position breaks, the broken part is easy to fall into the gear, which damages the meshing surface and affects the transmission. In severe cases, the gear is directly scrapped. Even if the broken part does not fall into the gear, the lubrication structure at this position loses the oil distribution function, which affects the lubrication effect and reduces the service life of the gear. For the lubrication welding structure, the risk is high, the service life is poor, and a certain amount of manpower and material resources are needed for maintenance in the later period, which increases the cost. SUMMARY

[0008] The technical problem solved by the present application is to provide a lubricating oil distributor with an oil outlet and a lubricating oil pipe and a reduction gearbox comprising the lubricating oil distributor, so that the lubricating oil distributor can not only deliver lubricating oil to different lubricating oil pipes to provide lubricating oil for multiple lubricating points, but also directly spray lubricating oil to the lubricating points inside the reduction gearbox, thereby reducing the number of oil delivery pipes inside the reduction gearbox, avoiding damage to the gears caused by the broken part of the welded oil delivery pipe, improving the lubricating effect and prolonging the service life.

[0009] The technical problem solved by the present application is solved by the following technical scheme:

[0010] The present application provides a lubricating oil distributor, which comprises a top surface and a bottom surface opposite to each other, and a side surface between the top surface and the bottom surface, the top surface, the bottom surface and the side surface form a lubricating oil cavity,

[0011] The top surface is provided with an oil inlet hole, and the oil inlet hole is in communication with an oil inlet pipe in an external oil circuit.

[0012] The side surface is provided with at least one oil outlet, and the oil outlet is in communication with a lubricating oil pipe.

[0013] The bottom surface is arranged at a through hole of a housing of a reduction gearbox, and the bottom surface is provided with a lubricating oil pipe inside the housing of the reduction gearbox, and the lubricating oil pipe is provided with at least one oil injection hole, and the oil injection hole is in communication with the inside of the housing of the reduction gearbox, and is used to deliver lubricating oil to the lubricating area inside the housing.

[0014] In order to facilitate the installation, limiting and fixing of the lubricating oil pipe, a limiting structure is arranged at one end of the lubricating oil pipe close to the bottom surface.

[0015] In order to ensure the establishment of lubricating pressure, the other end of the lubricating oil pipe away from the bottom surface is closed.

[0016] In order to deliver lubricating oil to more lubricating points, the lubricating oil pipe is in communication with the internal oil circuit.

[0017] In order to prevent oil leakage, a sealing structure is arranged between the lubricating oil distributor and the housing.

[0018] The present application provides a reduction gearbox, and the housing of the reduction gearbox is provided with the lubricating oil distributor as described above.

[0019] In order to better utilize the gravity and the pressure of the oil pump, the through hole of the housing of the reduction gearbox is arranged above the side of the meshing position of the gear pair, and the oil distribution pipe is arranged above the meshing position of the gear pair.

[0020] Preferably, the oil injection range of the oil injection hole is between the line connecting the center of the oil distribution pipe and the center of the large gear of the gear pair and the line connecting the center of the oil distribution pipe and the center of the small gear of the gear pair.

[0021] In order to increase the flexibility of the built-in oil path, one end of the built-in oil path of the reduction gearbox is communicated with the lubricating pipe, and the other end is provided with an oil distribution block.

[0022] Preferably, the oil distribution block is an oil distribution plate, which is T-shaped, and the inside of the oil distribution plate is provided with an oil distribution passage, one end of which is an oil inlet communicated with the built-in oil path, and the other end is at least one oil injection hole leading to the lubricating area.

[0023] Preferably, the oil distribution block is annular, comprising an oil inlet ring belt, a plurality of oil distribution ring oil distribution passages and a plurality of oil distribution ring oil injection holes arranged in sequence along the direction of the lubricating oil conveying.

[0024] In summary, the oil distributor with an oil outlet and an oil distribution pipe and the reduction gearbox comprising the same are provided, so that the oil distributor can not only convey lubricating oil into different lubricating pipes to provide lubricating oil for a plurality of lubricating points, but also directly inject lubricating oil to the lubricating points inside the reduction gearbox, thereby reducing the number of oil conveying pipes inside the reduction gearbox, avoiding the damage of the broken part of the welding position of the oil conveying pipe to the gear when the welding position is broken, improving the lubricating effect and prolonging the service life; in addition, the design of the oil distribution block such as the oil distribution ring or the oil distribution plate increases the flexibility of the built-in oil path, and the injection position of the lubricating oil can be more accurately controlled.

[0025] The technical solutions of the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is a schematic perspective view of the reduction gearbox provided with the oil distributor of the present application;

[0027] Fig. 2 is an enlarged view of a part of Fig. 1;

[0028] Fig. 3 is a schematic perspective view of the oil distributor of the present application;

[0029] Fig. 4 is a sectional view of the oil distributor of the present application;

[0030] Fig. 5 is a bottom view of the oil distributor of the present application;

[0031] Fig. 6 is a schematic perspective view of a part of another oil distributor of the present application not containing the oil distribution pipe;

[0032] Fig. 7 is a sectional view of another oil distributor of the present application without a portion of an oil distribution pipe;

[0033] Fig. 8 is a perspective view of an oil distribution pipe of the oil distributor of the present application;

[0034] Fig. 9 is a first schematic view of relative positions of the oil distributor and a gear pair of the present application;

[0035] Fig. 10 is a second schematic view of relative positions of the oil distributor and the gear pair of the present application;

[0036] Fig. 11 is a front view of an oil distribution plate of the present application;

[0037] Fig. 12 is an A-A sectional view of Fig. 11;

[0038] Fig. 13 is a schematic view of an installation position of the oil distribution plate of the present application;

[0039] Fig. 14 is a front view of an oil distribution ring of the present application;

[0040] Fig. 15 is a B-B sectional view of Fig. 14;

[0041] Fig. 16 is an enlarged view of a portion of Fig. 15.

[0042] [Explanation of Reference Numerals] 10a, 10b, 10b', 10c, 10d, 10e, 10f, 10g, 10h, 10i, 10j Heat dissipation patch 11a, 11c, 11d, 11j Outer surface layer 12a, 12b', 12c, 12d, 12e, 12f, 12g, 12h, 12i, 12j Heat dissipation layer DETAILED DESCRIPTION

[0043] Fig. 1 is a perspective view of a reduction gear box provided with an oil distributor of the present application; Fig. 2 is an enlarged view of a portion of Fig. 1; Fig. 3 is a perspective view of the oil distributor of the present application; Fig. 4 is a sectional view of the oil distributor of the present application; Fig. 5 is a bottom view of the oil distributor of the present application; Fig. 6 is a perspective view of another oil distributor of the present application without a portion of an oil distribution pipe; Fig. 7 is a sectional view of another oil distributor of the present application without a portion of an oil distribution pipe; Fig. 8 is a perspective view of an oil distribution pipe of the oil distributor of the present application; Fig. 9 is a first schematic view of relative positions of the oil distributor and a gear pair of the present application; Fig. 10 is a second schematic view of relative positions of the oil distributor and the gear pair of the present application. As shown in Figs. 1 to 10, the present application provides an oil distributor 100 provided on a housing 210 of a reduction gear box 200 for distributing lubricating oil and having a hollow structure. The reduction gear box can be a parallel reduction gear box, a planetary reduction gear box, or a combination thereof, etc. The present application is described by way of example with the parallel reduction gear box.

[0044] The oil distributor 100 comprises a top surface 110 and a bottom surface 120 opposite to each other, and a side surface 130 between the top surface 110 and the bottom surface 120. The present application does not limit the shape of the oil distributor 100, which can be (approximately) cylindrical, or (approximately) cuboid, or other shapes. The top surface 110, the bottom surface 120 and the side surface 130 form an oil distribution cavity.

[0045] It should be noted that the top surface 110 and the bottom surface 120 can be flat, or stepped with bosses or grooves, or arc surfaces, etc., which can be designed and selected by those skilled in the art according to actual conditions. The top surface 110 is the surface of the oil distributor 100 away from the reduction box 200, and the bottom surface 120 is the surface of the oil distributor 100 close to the reduction box 200.

[0046] The top surface 110 is provided with an oil inlet hole 111. The oil inlet hole 111 is in communication with an oil inlet pipeline in an external oil circuit. For example, lubricating oil in an oil tank is pumped into the oil inlet pipeline in the external oil circuit by a motor or an oil pump, and then enters the oil distribution cavity of the oil distributor 100 through the oil inlet hole 111. In order to ensure the quality of the lubricating oil and prevent pollutants in the environment outside the tank from entering the reduction box, a filter can also be provided between the external oil circuit and the motor or the oil pump.

[0047] Various connections in the present application, such as the connection between the oil inlet pipeline and the oil inlet hole 111, can be connected by NPT threads (when flexible connection is more) and G threads (when rigid connection is more), so as to facilitate replacement and switching.

[0048] The side surface 130 is provided with at least one oil outlet 131, and the present application does not limit the number of oil outlets 131. In the examples shown in FIGS. 3-5, the number of oil outlets 131 is 3, and the 3 oil outlets 131 are uniformly distributed on the outer periphery of the side surface 130; in the examples shown in FIGS. 6-7, the number of oil outlets 131 is 4, and the 4 oil outlets 131 are uniformly distributed on the outer periphery of the side surface 130.

[0049] The oil outlet 131 is in communication with a lubricating pipeline 132, and the lubricating oil in the oil distribution cavity enters the lubricating pipeline 132 through the oil outlet 131 and is then delivered to a lubrication area, such as a friction pair surface of a gear or a bearing. In this embodiment, the gear pair is taken as an example to illustrate the lubrication area, which comprises a large gear and a small gear meshing with each other, and the diameter of the large gear is greater than that of the small gear.

[0050] The lubricating oil in the oil distribution chamber can also be transported into the built-in oil passage through the oil outlet 131 and the lubricating pipe 132, and then transported to other positions along the built-in oil passage, which can be an oil passage opened in the shell 210 of the reduction gearbox 200.

[0051] The bottom surface 120 is arranged at the through hole 211 of the shell 210 of the reduction gearbox 200. The connection mode of the oil distributor 100 and the shell 210 includes, but is not limited to, bolt connection, clamping connection, etc. The bottom surface 120 is provided with an oil distribution pipe 150 located inside the shell 210 of the reduction gearbox 200, and at least one oil injection hole 121 is arranged on the oil distribution pipe 150. The oil injection hole 121 is in communication with the inside of the shell 210 of the reduction gearbox 200, and is used to transport lubricating oil to the lubrication area inside the shell 210, that is, the oil injection hole 121 of the oil distribution pipe 150 directly provides lubricating oil for the lubrication area inside the shell 210 without the need to connect other oil conveying pipes or other structures. In other words, in this embodiment, the oil distributor 100 penetrates the shell 210 of the reduction gearbox 200 through the through hole 211, the oil distribution pipe 150 is located inside the shell 210, and the part of the oil distribution pipe 150 of the oil distributor 100 is located outside the shell 210. Exemplarily, the center axis of the part of the oil distribution pipe 150 coincides with the center axis of the oil distribution pipe 150.

[0052] In order to facilitate the installation, positioning and fixing of the oil distribution pipe 150, a limiting structure 151 is arranged at one end of the oil distribution pipe 150 close to the bottom surface 120. In this example, the limiting structure 151 is a semicircular boss, and at this time, a semicircular groove corresponding to the semicircular boss is arranged on the oil distributor 100. When the oil distribution pipe 150 is installed and fixed, the semicircular boss and the semicircular groove are clamped with each other, so as to limit the position of the oil distribution pipe 150 and the direction of the oil injection hole 121. The present application does not limit the specific type of the limiting structure 151, for example, positioning pins and positioning grooves can also be used.

[0053] In order to ensure the establishment of lubricating pressure, the end of the oil distribution pipe 150 away from the bottom surface 120 is closed. The closure can be realized by the shell 210, for example, the shell 210 abuts against the end of the oil distribution pipe 150 away from the bottom surface 120 through a sealing ring such as an O-ring, a D-ring, etc. A round pipe with one end closed and one end open can also be directly used.

[0054] The present application is not limited to this, and the end of the oil distribution pipe 150 away from the bottom surface 120 can also be unsealed. For example, the end of the oil distribution pipe 150 away from the bottom surface 120 is in communication with other lubricating oil paths (such as openings on the housing, built-in oil paths, lubricating pipes, etc.), thereby providing lubricating oil for other areas to be lubricated.

[0055] The present application is not limited to the number and position of the oil injection holes 121. When the oil injection holes 121 are multiple, they can be arranged in a linear, circular, arc, or square shape, etc. The oil injection directions of the multiple oil injection holes 121 can be the same or different as needed.

[0056] In order to improve the lubrication effect, the projection of the oil injection hole 121 in the vertical direction falls on the gear pair, or the distance between the edge of the gear pair and the oil injection hole 121 is less than 15 mm (at this time, the projection of the oil injection hole 121 in the vertical direction is not on the gear pair, but outside the gear pair).

[0057] In order to realize the sealing between the oil distributor 100 and the housing 210 of the reduction gearbox 200, a sealing structure is provided between the oil distributor 100 and the housing 210, which includes but is not limited to a sealing ring or sealing glue, etc. Among them, the size of the through hole 211 is correspondingly arranged with the oil distributor 100, so that the oil distributor 100 and the housing 210 can be sealingly connected while the oil distribution pipe 150 is located inside the housing 210, so that the lubricating oil can pass through the oil injection hole 121 of the oil distribution pipe 150 from the oil distribution chamber of the oil distributor 100 and directly enter the inside of the housing 210 of the reduction gearbox 200, thereby providing lubricating oil for the areas to be lubricated.

[0058] Exemplarily, as shown in FIGS. 9 and 10, when it is needed to lubricate the gear pair in the reduction gearbox 200, the oil distribution pipe 150 is arranged above the meshing position of the gear pair, at this time, the through hole 211 is arranged above the side surface of the meshing position of the gear pair.

[0059] In order to more accurately distribute the lubricating oil, in FIG. 10, the oil injection range of the oil injection hole 121 is between the line connecting the center of the oil distribution pipe 150 and the center of the large gear and the line connecting the center of the oil distribution pipe 150 and the center of the small gear, and the oil injection range a < 140°.

[0060] In order to be able to accurately install the oil distributor 100, an error-proofing structure is further provided on the oil distributor 100, which includes but is not limited to an arrow mark provided on the top surface 110 (as shown in FIG. 3), a limiting groove provided on the oil distributor 100, etc.

[0061] Through the above arrangement, the lubricating oil can flow through multiple positions of the reduction gearbox that need to be lubricated.

[0062] It should be noted that, in order to simplify the oil circuit design, for the internal lubrication points of the reduction gearbox 200, which are more and the space is small, the local thickening part of the radial rib plate can be used to process the built-in oil circuit, and the corresponding rib plate structure can be increased according to the built-in oil channel requirement. Generally, the built-in oil circuit is processed by the rib plate in the nearest position. The use of the built-in oil circuit can reduce the number of pipe arrangements and avoid welding pipes. It should be noted that the length-diameter ratio of the built-in oil circuit cannot be too large, otherwise the oil hole will be deviated, or a drill with higher stiffness needs to be used to increase the processing cost, so the length-diameter ratio generally cannot exceed 20.

[0063] However, due to the complex structure inside the reduction gearbox 200, the traditional built-in oil circuit often cannot deliver lubricating oil to all areas to be lubricated, such as multiple rotating planetary gear and bearings. The application also provides a split oil block, which is internally provided with a split oil passage, one end of the split oil passage is an oil inlet communicated with the built-in oil circuit, and the other end of the split oil passage is at least one oil injection port communicated with the lubrication area, that is, one end of the built-in oil circuit is communicated with the lubrication pipeline 132, and the other end is communicated with the oil inlet of the split oil block. The lubricating oil in the split oil chamber of the split oil block 100 can enter the lubrication pipeline 132 through the oil outlet 131 and then be delivered to the built-in oil circuit, and then be delivered to the oil inlet of the split oil block along the built-in oil circuit, so as to be more accurately delivered to the lubrication area.

[0064] The application does not limit the specific fixed sealing way of the split oil block, and bolts, sealing glue, welding, interference insertion, O-ring, etc. can be used.

[0065] The application does not limit the specific structure of the split oil block, and those skilled in the art can design it according to the needs. Two kinds of split oil blocks are exemplarily described below.

[0066] Fig. 11 is a front view of the split oil plate of the application; Fig. 12 is an A-A sectional view of Fig. 11; and Fig. 13 is a schematic view of the installation position of the split oil plate of the application. As shown in Figs. 11 to 13, the split oil block is, for example, a split oil plate 800, which is (approximately) T-shaped, and the inside of the split oil plate 800 is provided with a split oil plate split oil passage 810, one end of the split oil plate split oil passage 810 is a split oil plate oil inlet 811 communicated with the built-in oil circuit (for example, the built-in oil circuit 880 shown in the figure), and the other end is at least one split oil plate oil injection port 812 communicated with the lubrication area. Exemplarily, the split oil plate 800 can be arranged on one side of the bearing (such as the rear bearing 890 of the large gear) to provide lubricating oil for the bearing through the split oil plate oil injection port 812.

[0067] To secure the oil distributor plate 800, the oil distributor plate is also provided with fixing holes 820, which can be used to fix the oil distributor plate 800 to the housing 210 of the gearbox 200 through the fixing holes 820. Preferably, there are two fixing holes 820, which are arranged on both sides of the oil distribution channel 810 of the oil distributor plate.

[0068] Figure 14 is a front view of the oil distribution ring of the present invention; Figure 15 is a BB cross-sectional view of Figure 14; Figure 16 is a partial enlarged view of Figure 15. As shown in Figures 14 to 16, the oil distribution block is, for example, an oil distribution ring 900. The oil distribution ring 900 is generally annular and includes an oil inlet ring band 911, a plurality of oil distribution ring channels 910, and a plurality of oil distribution ring nozzles 912 arranged sequentially along the lubricating oil conveying direction. The oil inlet ring band 911 is arranged circumferentially around the oil distribution ring 900; one end of the oil distribution ring channel 910 is connected to the oil inlet ring band 911, and the other end is connected to the oil distribution ring nozzle 912, and the oil distribution ring channel 910 is arranged radially along the oil distribution ring 900; the oil distribution ring nozzles 912 are located on the side of the oil distribution ring 900, and the plurality of oil distribution ring nozzles 912 are preferably arranged in a ring. The present invention does not limit the specific position of the oil injection port 912 of the oil distribution ring, which can be adjusted according to the area to be lubricated.

[0069] The lubricating oil in the oil distribution chamber of the oil distributor 100 can enter the lubrication pipe 132 through the oil outlet 131 and then be transported to the built-in oil circuit. After that, it is transported along the built-in oil circuit to the oil inlet ring 911 of the oil distribution ring 900, and then sprayed out from the oil spray port 912 of the oil distribution ring after passing through the oil distribution channel 910 of the oil distribution ring.

[0070] For example, the oil distribution ring 900 can be disposed on one side of the area to be lubricated (e.g., planetary gear, planetary bearing, and rear bearing of parallel gear), and provide lubricating oil to the area to be lubricated through the oil injection port 912 of the oil distribution ring.

[0071] In order to enable the oil distributor ring 900 to be installed more precisely, a flange 920 can also be provided on the side of the oil distributor ring 900. By adjusting the specific structure of the flange 920, the installation position of the oil distributor ring 900 can be controlled and the oil distributor ring 900 can be prevented from being installed backwards.

[0072] This invention does not limit the specific shape and angle of the oil inlet ring 911, the multiple oil distribution rings and oil distribution channels 910, and the multiple oil distribution ring nozzles 912, which can be adjusted as needed. Preferably, the diameter of the oil distribution ring nozzles 912 is 0.5mm to 10mm; the oil distribution ring nozzles 912 can be located on one side or both sides of the oil distribution ring 900.

[0073] The aforementioned oil distribution blocks, such as the oil distribution ring 900 or the oil distribution plate 800, can more accurately control the injection position of lubricating oil. Compared with the traditional built-in oil circuit, the oil distribution blocks are easier to manufacture and increase the flexibility of the built-in oil circuit.

[0074] In summary, this invention provides an oil distributor that simultaneously has an oil outlet and an oil distribution pipe. This allows the distributor to not only deliver lubricating oil to different lubrication pipes, providing lubricating oil to multiple lubrication points, but also to directly spray lubricating oil onto the lubrication points inside the gearbox. This reduces the number of oil supply pipes inside the gearbox, avoids damage to the gears from broken parts when the welded joints of the oil supply pipes break, and results in good lubrication and a long service life. In addition, the design of oil distribution blocks such as oil distribution rings or oil distribution plates increases the flexibility of the internal oil circuit and allows for more precise control of the lubricating oil spray position.

[0075] List of reference numerals: 100 Oil distributor; 110 Top surface; 111 Oil inlet; 120 Bottom surface; 121 Oil spray hole; 130 Side surface; 131 Oil outlet; 132 Lubrication pipe; 150 Oil distribution pipe; 151 Limiting structure; 200 Gearbox; 210 Housing; 211 Through hole; 800 Oil distributor plate; 810 Oil distributor plate oil distribution channel; 811 Oil distributor plate oil inlet; 812 Oil distributor plate oil spray port; 820 Fixing hole; 880 Internal oil passage; 890 Rear bearing; 900 Oil distributor ring; 911 Oil inlet ring belt; 910 Oil distributor ring oil distribution channel; 912 Oil distributor ring oil spray port; 920 Flange.

Claims

1. An oil separator, the oil separator comprising a top surface (110) and a bottom surface (120) opposite to each other, and a side surface (130) located between the top surface (110) and the bottom surface (120), the top surface (110), the bottom surface (120) and the side surface (130) forming an oil-separating chamber, characterized in that, The top surface (110) is provided with an oil inlet hole (111), which is connected to the oil inlet pipe in the external oil circuit; The side (130) is provided with at least one oil outlet (131), which is connected to the lubrication pipe (132); The bottom surface (120) is located at the through hole (211) of the housing (210) of the gearbox. The bottom surface (120) is provided with an oil distribution pipe (150) located inside the housing (210) of the gearbox. The oil distribution pipe (150) is provided with at least one oil injection hole (121), and the oil injection hole (121) is connected to the interior of the housing (210) of the gearbox.

2. The oil separator as described in claim 1, characterized in that, A limiting structure (151) is provided at one end of the oil distribution pipe (150) near the bottom surface (120).

3. The oil separator as described in claim 2, characterized in that, The end of the oil distribution pipe (150) away from the bottom surface (120) is closed.

4. The oil separator as described in claim 1, characterized in that, The lubrication pipe (132) is partially connected to the built-in oil circuit.

5. The oil separator as described in claim 1, characterized in that, A sealing structure is provided between the oil separator and the housing (210).

6. A gearbox, characterized in that, The gearbox housing (210) is provided with an oil distributor as described in any one of claims 1-5.

7. The gearbox as described in claim 6, characterized in that, The through hole (211) of the housing (210) of the gearbox is opened above the side of the gear pair meshing point of the gearbox, and the oil distribution pipe (150) is arranged above the gear pair meshing point.

8. The gearbox as described in claim 7, characterized in that, The oil injection range of the oil injection hole (121) is located between the line connecting the center of the oil distribution pipe (150) and the center of the large gear of the gear pair and the line connecting the center of the oil distribution pipe (150) and the center of the small gear of the gear pair.

9. The gearbox as described in claim 6, characterized in that, One end of the internal oil circuit of the gearbox is connected to the lubrication pipe (132), and an oil distribution block is provided at the other end.

10. The gearbox as described in claim 9, characterized in that, The oil distribution block is an oil distribution plate (800), which is T-shaped. The oil distribution plate (800) has an oil distribution channel (810) inside. One end of the oil distribution channel (810) is an oil distribution plate inlet (811) connected to the built-in oil circuit, and the other end is at least one oil distribution plate spray port (812) leading to the area to be lubricated.

11. The gearbox as described in claim 9, characterized in that, The oil distribution block is annular, including an oil inlet ring (911), multiple oil distribution ring channels (910), and multiple oil distribution ring nozzles (912) arranged sequentially along the lubricating oil conveying direction.

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