CN217502542U

CN217502542U - Reduction gearbox lubricating system

Info

Publication number: CN217502542U
Application number: CN202221309451.XU
Authority: CN
Inventors: 杜生超; 张晓超; 彭鹏; 沈彭; 鲁东; 姜才俊; 张涛
Original assignee: Nanjing Nangaochi New Energy Automobile Transmission Equipment Co ltd
Current assignee: Nanjing Nangaochi New Energy Automobile Transmission Equipment Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-27
Anticipated expiration: 2032-05-27

Abstract

The application provides a reducing gear box lubricating system, reducing gear box lubricating system includes case shell, sun gear, planet carrier, ring gear, annular oil baffle and force-feed lubrication unit. The housing is configured with a first bearing and a second bearing. The central gear is rotatably arranged on the box shell. The planet carrier is simultaneously connected with the first bearing and the second bearing; the planet carrier is provided with a planet wheel assembly having a first oil transfer hole. The gear ring is connected with the case shell, and the planetary gear is meshed with the gear ring. The annular oil baffle is connected with the planet carrier, and the forced lubrication unit is configured to force lubricating oil into the first bearing. At least part of first bearing is located the region that annular oil baffle encloses to make the lubricating oil that leaves from first bearing fall into annular oil baffle in, annular oil baffle is used for oppressing lubricating oil to in the first oil transfer hole in rotatory process, and lubricating oil in the first oil transfer hole can enter into planet wheel assembly and second bearing in proper order. The lubricating effect is good.

Description

Reduction gearbox lubricating system

Technical Field

The utility model relates to a lubricated technical field particularly, relates to a reducing gear box lubricating system.

Background

The planetary reduction gearbox used on the vehicle is mostly in splash lubrication, the rotating speed of the motor is higher and higher along with the development of new energy automobiles, and if the oil in the gearbox is more, the oil stirring loss of the gearbox is very obvious, so that the transmission efficiency is seriously influenced; if the gear box has less oil, the planetary gear can stir most of lubricating oil to fill the whole gear box under the high-rotating-speed state, and the lubricating oil attached to the gear can be thrown away from the tooth surface under the action of high-rotating-speed centrifugal force, so that the sufficient lubricating oil is difficult to provide for the meshing position of the gear.

The inventor researches and discovers that the prior reduction gearbox has the following defects:

the lubrication effect is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a reducing gear box lubricating system, it can improve lubricated effect.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a reducing gear box lubricating system, include:

the bearing device comprises a box shell, a bearing seat and a bearing seat, wherein the box shell is provided with a first bearing hole and a second bearing hole, and a first bearing and a second bearing are respectively arranged in the first bearing hole and the second bearing hole;

a forced lubrication unit configured to force lubricating oil into the first bearing;

the central gear is rotatably arranged on the box shell;

the planet carrier is simultaneously connected with the first bearing and the second bearing; the planet carrier is provided with a planet wheel assembly with a first oil transmission hole;

the planetary wheel assembly is simultaneously meshed with the gear ring and the sun gear;

and the annular oil baffle plate is connected with the planet carrier, at least part of the first bearing is positioned in an area surrounded by the annular oil baffle plate, so that lubricating oil leaving from the first bearing falls into the annular oil baffle plate, the annular oil baffle plate is used for pressing the lubricating oil into the first oil conveying hole in the rotating process, and the lubricating oil in the first oil conveying hole can sequentially enter the planet wheel assembly and the second bearing.

In an optional embodiment, the annular oil baffle plate comprises a plate body and a positioning pipe which are connected, the plate body is connected with the planet carrier, and the positioning pipe is inserted into the first oil transportation hole; lubricating oil contained in the plate body can enter the positioning pipe under the action of centrifugal force.

In an alternative embodiment, the plate body has an arc-shaped guide surface extending in a shape of a throat from outside to inside toward a side away from the first oil delivery hole, for guiding the lubricating oil delivered from the forced lubrication unit to the first bearing into the positioning pipe.

In an alternative embodiment, the central gear is provided with a second oil delivery hole and a central oil delivery hole, the central oil delivery hole and the oil delivery direction of the second oil delivery hole form an included angle, lubricating oil can enter the second oil delivery hole and the central oil delivery hole through the forced lubrication unit, the second oil delivery hole is used for delivering the lubricating oil to the first bearing, and the central oil delivery hole is used for delivering the lubricating oil to the planetary gear assembly.

In an optional embodiment, the planet wheel assembly comprises a planet gear and a pin shaft, the first oil delivery hole is formed in the pin shaft, and the pin shaft is fixedly connected with the planet carrier; the planetary gear comprises a first gear body and a second gear body which are coaxially arranged, the first gear body and the second gear body are sleeved outside the pin shaft, the first gear body is meshed with the central gear, and the second gear body is meshed with the gear ring.

In an alternative embodiment, the planet carrier is provided with a first guide inclined surface and a second guide inclined surface, the first guide inclined surface and the second guide inclined surface have an included angle, and the first guide inclined surface is used for guiding the lubricating oil output from the central oil conveying hole to the first gear body; the second guide slope is used for guiding the lubricating oil output from the central oil delivery hole to the second gear body.

In an optional implementation manner, the first oil conveying hole includes a main conveying section and a plurality of auxiliary conveying sections, one end of the main conveying section extends to the end face of the pin shaft, one ends of the plurality of auxiliary conveying sections are all communicated with the main conveying section, and the other ends of the plurality of auxiliary conveying sections extend to the outer peripheral surface of the pin shaft.

In an alternative embodiment, a third oil transfer hole is provided in the carrier, and the third oil transfer hole is used for guiding the lubricating oil flowing through the planetary wheel assembly to the position of the second bearing.

In an alternative embodiment, the bottom of the housing is provided with an oil discharge hole which controls the level of lubricating oil inside the housing to float at the lowest position of the planetary wheel assembly and the annular oil baffle.

In an alternative embodiment, the box shell is provided with a box cover and a box body which are connected, and the second bearing hole is formed in the box body; the box cover is provided with a central cylinder part, a first annular plate part, a second annular plate part and a third annular plate part which are integrated, the first annular plate part is parallel to the second annular plate part, the inner edge of the second annular plate part is connected with the first annular plate part, the outer edge of the second annular plate part is connected with the third annular plate part, the second annular plate part and the first annular plate part and the second annular plate part form an included angle, and the first bearing hole is formed in the central cylinder part; the oil drain hole is provided in an outer edge of the third annular plate portion; the cross-sectional area of the inner wall surface of the second annular plate portion is gradually reduced towards the direction far away from the planet carrier, and a space is formed between the second annular plate portion and the planet carrier to define an annular channel; wherein the cross-section is a plane perpendicular to the first bearing bore.

The embodiment of the utility model provides a beneficial effect is:

in summary, the reduction gearbox lubricating system provided by the embodiment is applied to a reduction gearbox of an electric vehicle with a high rotating speed, when the reduction gearbox lubricating system is used, lubricating oil is input from the second oil delivery hole of the central gear, part of the lubricating oil circulates in the second oil delivery hole under the action of centrifugal force, and the lubricating oil output from the second oil delivery hole enters the position of the first bearing to lubricate the first bearing; simultaneously, lubricating oil behind first bearing, from the lubricating oil of first bearing exhaust fall into the region that the annular oil baffle encloses, oppress lubricating oil to first oil delivery downthehole at the rotatory in-process of annular oil baffle to lubricating oil is carried to planet wheel subassembly position from first oil delivery hole, lubricates the planet wheel subassembly. It will be appreciated that part of the lubricating oil can flow in the housing to lubricate the meshing positions of the central gear and the planetary gears and the meshing positions of the planetary gears and the ring gear, so that the gears and the bearings inside the gearbox can be effectively lubricated, and the gearbox has stable performance and long service life.

Simultaneously, because the lubricating oil in the annular oil baffle mainly comes from falling from the first bearing, compare through the mode that oil baffle ladled up with prior art's lubricating oil, can reduce the stirring of rotary part and the unlubricated effect of lubricating oil, avoid the lubricating oil intensification that this part collision arouses, reduce gear running resistance simultaneously, it is big than the oil feed volume of oil baffle ladling oil directly to annular oil baffle in addition to water oil, the lubricating oil high-usage, lubricated effect is better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a reduction gearbox lubricating system according to an embodiment of the present invention;

FIG. 2 is a partially enlarged schematic view of FIG. 1;

fig. 3 is a schematic structural diagram of a pin shaft according to an embodiment of the present invention.

Icon:

001-identification line; 100-a box shell; 110-a first bearing; 120-a second bearing; 130-a central barrel portion; 140-a first annular plate portion; 150-a second annular plate portion; 160-a third annular plate portion; 170-annular channel; 200-sun gear; 210-a second oil transfer hole; 220-a central oil transfer hole; 300-a planet carrier; 310-a first guiding ramp; 320-a second guide ramp; 330-a third oil transfer hole; 340-a third bearing; 350-oil drain hole; 400-pin shaft; 410-a first oil transfer hole; 411-a main conveying section; 412-an auxiliary transport section; 500-a planetary gear; 510-a first gear body; 520-a second gear body; 600-a gear ring; 700-annular oil baffle; 710-an arc-shaped guide surface; 720-plate body; 730-positioning tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

At present, the high-speed electric automobile gear box adopts splash lubrication, namely, after lubricating oil is input into the gear box, the centrifugal force generated by the gears and the planet carrier 300 in the working process of the gear box drives the lubricating oil to flow in the gear box, so that lubrication is realized. Because the gear box of the high-speed electric automobile has high rotating speed in the operation process, the lubricating oil is basically positioned on the periphery, and the lubricating effect is poor.

In view of this, the designer has designed a reducing gear box lubricating system, can accurately carry the lubricated liquid to the position of waiting to lubricate, and lubricated effectual.

Referring to fig. 1, in the present embodiment, the reduction gearbox lubrication system includes a box housing 100, a sun gear 200, a planet carrier 300, a pin 400, a planet gear 500, a ring gear 600, an annular oil baffle 700, and a forced lubrication unit (not shown). The housing 100 is provided with a first bearing 110 hole and a second bearing 120 hole, and the first bearing 110 and the second bearing 120 are respectively disposed in the first bearing 110 hole and the second bearing 120 hole. The sun gear 200 is rotatably provided on the housing. The planet carrier 300 is connected to both the first bearing 110 and the second bearing 120. The pin 400 is fixedly connected with the planet carrier 300, the third bearing 340 is sleeved outside the pin 400, and the pin 400 is provided with a first oil transmission hole 410. The planetary gear 500 is sleeved outside the third bearing 340 and engaged with the sun gear 200. The ring gear 600 is connected to the casing 100, and the planetary gears 500 are engaged with the ring gear 600. The annular oil deflector 700 is connected to the carrier 300. The forced lubrication unit is configured to force the lubricant into the first bearing 110, at least a portion of the first bearing 110 is located in a region surrounded by the annular oil baffle 700, so that the lubricant exiting from the first bearing 110 falls into the annular oil baffle 700, the annular oil baffle 700 is configured to force the lubricant into the first oil delivery hole 410 during rotation, and the lubricant in the first oil delivery hole 410 can sequentially enter the planetary gear assembly and the second bearing 120.

It should be understood that the pin 400 and the planet gear 500 may be referred to as a planet wheel assembly.

The working principle of the gearbox lubricating system provided by the embodiment is as follows:

the reduction gearbox lubricating system provided by the embodiment is applied to a reduction gearbox of an electric vehicle with a high rotating speed, and when the reduction gearbox lubricating system is used, lubricating oil is forced to enter the first bearing 110 by using the forced lubricating unit to lubricate the first bearing 110; meanwhile, after the lubricating oil passes through the first bearing 110, please refer to the mark line 001 in fig. 2, it is clear that the lubricating oil discharged from the first bearing 110 can smoothly fall into the region enclosed by the annular oil baffle plate 700, the lubricating oil is pressed into the first oil transmission hole 410 in the rotation process of the annular oil baffle plate 700, and the lubricating oil is transmitted from the first oil transmission hole 410 to the position of the planetary gear assembly to lubricate the planetary gear assembly. It should be understood that part of the lubricating oil can flow in the housing 100 to lubricate the meshing position of the central gear 200 and the planetary gears 500 and the meshing position of the planetary gears 500 and the ring gear 600, so that the gears and the bearings inside the gearbox can be effectively lubricated, the gearbox is stable in performance and long in service life.

Meanwhile, as the lubricating oil in the annular oil baffle plate 700 mainly comes from falling from the first bearing 110, compared with the mode that the lubricating oil in the prior art ladles through the oil baffle plate, the stirring of the lubricating oil without the lubricating effect of a rotating part can be reduced, the temperature rise of the lubricating oil caused by the collision is avoided, the gear running resistance is reduced, the oil pouring amount of the annular oil baffle plate 700 is larger than the oil inlet amount of the oil ladled by the oil baffle plate, the lubricating oil utilization rate is high, and the lubricating effect is better.

Wherein the forced lubrication unit provides a pressure difference for circulation of the lubricating oil through the oil pump, thereby enabling the lubricating oil to be forced into the first bearing 110.

In this embodiment, optionally, the box casing 100 includes a box body and a box cover, the box body has two opposite openings, the box cover is fixedly connected to the box body through bolts, the box cover is located at one of the openings, a first bearing 110 hole is provided on the box cover, and a second bearing 120 hole is provided on a portion of the box body away from the opening of the box cover. The box body and the box cover are detachably connected through the bolts, the connection mode is simple and reliable, the assembly is convenient, and the cost is low.

Further, the case cover is provided with an oil discharge hole 350, the oil discharge hole 350 controls the oil level of the lubricating oil in the case shell 100 to float at the lowest position of the planetary gear assembly and the annular oil baffle plate 700 when the gearbox normally works, the oil discharge hole 350 is located at the lower position of the case cover, the lubricating oil in the case shell 100 can flow back to the oil tank, and therefore the lubricating oil is used for taking away heat. Meanwhile, the oil level of lubricating oil in the box shell 100 is effectively reduced through the oil discharge hole 350, the lubricating oil is prevented from being stirred in the transition mode of the planet carrier 300, the planet wheel assembly and the annular oil baffle plate 700, the high-temperature hidden danger probability of the lubricating oil is reduced, the running resistance of the internal structure of the reduction gearbox is reduced, and the transmission efficiency is improved.

Optionally, the box cover has an integrated central cylinder portion 130, a first annular plate portion 140, a second annular plate portion 150 and a third annular plate portion 160, the first annular plate portion 140 is parallel to the second annular plate portion 150, an inner edge of the second annular plate portion 150 is smoothly connected with the first annular plate portion 140, an outer edge of the second annular plate portion 150 is smoothly connected with the third annular plate portion 160, and the second annular plate portion 150 is at an angle with both the first annular plate portion 140 and the second annular plate portion 150, that is, the second annular plate portion 150 is inclined with respect to both the first annular plate portion 140 and the second annular plate portion 150. The first bearing 110 is bored in the center cylinder 130. The oil drain hole 350 is provided in the outer edge of the third annular plate portion 160. The cross-sectional area of the inner wall surface of the second annular plate portion 150 gradually decreases toward a direction away from the carrier 300, that is, the edge of the second annular plate portion 150 connected to the first annular plate portion 140 is recessed inward compared to the edge of the third annular plate portion 160. The second annular plate portion 150 is spaced from the planet carrier 300 to define an annular channel 170; wherein the cross-section is a plane perpendicular to the bore of the first bearing 110. Meanwhile, an orthographic projection of one side surface of the carrier 300 close to the first bearing 110 hole in the direction perpendicular to the axis of the first bearing 110 hole is located between the inner wall surface of the first annular plate portion 140 and the inner wall surface of the third annular plate portion 160. With such a design, when the automobile bumps or the rotation speed of the gear is high, the oil at the bottom of the housing 100 cannot easily flow through the annular channel 170 to soak the annular oil baffle plate 700, and the structural design of the second annular plate portion 150 can effectively buffer the lubricating oil after the large circulation, and is matched with the oil discharge hole 350 to stabilize the oil level.

In this embodiment, optionally, the central gear 200 is provided with a second oil transportation hole 210 and a central oil transportation hole 220, an included angle is formed between the central oil transportation hole 220 and the oil transportation direction of the second oil transportation hole 210, the cross section of the central oil transportation hole 220 is circular, the axis of the central oil transportation hole 220 is collinear with the axis of the central gear 200, the central oil transportation hole 220 is a diameter-variable hole, the diameters of two orifices of the central oil transportation hole 220 are different, and the diameter of one end of the central oil transportation hole 220 for inputting lubricating oil is larger than that of the other end thereof. That is, the lubricant is input from one port of the central oil transmission hole 220 having a larger diameter and output from the smaller one port, so that the output speed of the lubricant can be increased, thereby allowing the lubricant to smoothly reach the set position. The second oil feed hole 210 communicates with the center oil feed hole 220, and the axis of the second oil feed hole 210 extends in the radial direction of the sun gear 200. During operation of the gearbox, the lubricating oil is input from one end of the central oil input hole 220, part of the lubricating oil is directly output from the other end of the central oil input hole 220, part of the lubricating oil is output from the second oil input hole 210, and the lubricating oil output from the second oil input hole 210 enters the position of the first bearing 110, so that different positions are lubricated. That is, the forced lubrication unit can force the lubricating oil into the central oil feed hole 220 and the second oil feed hole 210.

In this embodiment, optionally, the planet carrier 300 is provided with a first guiding inclined surface 310 and a second guiding inclined surface 320, and the first guiding inclined surface 310 and the second guiding inclined surface 320 form an included angle. The planet carrier 300, the box body and the box cover jointly define a chamber for containing lubricating oil, and an oil seal is arranged between one side of the planet carrier 300, which is far away from the box cover, and the box body. The number of the first guide slopes 310 and the second guide slopes 320 may be provided in plurality, and the plurality of first guide slopes 310 and the plurality of second guide slopes 320 are alternately arranged in the circumferential direction of the rotation axis of the carrier 300. Be provided with the fixed orifices on the planet carrier 300, in the fixed orifices was worn to locate by the round pin axle 400 to with planet carrier 300 fixed connection. The smaller diameter end of the central oil feed hole 220 of the sun gear 200 is directly opposite to the planet carrier 300, and the lubricating oil output from the central oil feed hole 220 reaches the planet carrier 300 and is blocked by the planet carrier 300, and can contact with the first guide inclined plane 310 and the second guide inclined plane 320 of the planet carrier 300, and under the guidance of the first guide inclined plane 310 and the second guide inclined plane 320, the lubricating oil is guided to different directions, so that the direct lubrication can be performed on different positions in the gear box, and the lubricating effect is good.

Further, the carrier 300 is further provided with a third oil supply hole 330, so that the lubricating oil reaching the third bearing 340 from the first oil supply hole 410 can enter the third oil supply hole 330 after passing through the third bearing 340, and can reach the position of the ring gear 600 to perform auxiliary lubrication on the meshing position of the ring gear 600 and the planet gears 500. In addition, the third oil transfer hole 330 may be designed as a blind hole with an internal thread for positioning, and the pin 400 may be fastened by a bolt.

Optionally, the planetary gear 500 includes a first gear body 510 and a second gear body 520 coaxially disposed, and the first gear body 510 and the second gear body 520 are of an integrated structure and are both sleeved outside the third bearing 340. The first gear body 510 meshes with the sun gear 200, and the second gear body 520 meshes with the ring gear 600. The first guide slope 310 serves to guide the lubricating oil outputted from the center oil feed hole 220 to the first gear body 510 during operation of the gear box, thereby lubricating the meshing position of the first gear body 510 and the sun gear 200. The second guide slope surface 320 serves to guide the lubricating oil delivered from the central oil delivery hole 220 to the second gear body 520, thereby lubricating the meshing position of the second gear body 520 and the ring gear 600.

Referring to fig. 3, in the present embodiment, optionally, the first oil hole 410 on the pin 400 is configured to be multi-segmented, for example, the first oil hole 410 includes a main conveying section 411 and a plurality of auxiliary conveying sections 412, one end of the main conveying section 411 extends to an end surface of the pin 400 close to the box cover, one end of each of the plurality of auxiliary conveying sections 412 is communicated with the main conveying section 411, and the other end of each of the plurality of auxiliary conveying sections extends to an outer peripheral surface of the pin 400. An end of the pin shaft 400 adjacent to the cover is spaced apart from the cover so as to facilitate the flow of the lubricating oil flowing out from the second oil feed hole 210 to the first oil feed hole 410. And the lubricating oil is fed from the main feeding section 411 and then fed from the plurality of auxiliary feeding sections to lubricate the third bearing 340.

In this embodiment, optionally, the annular oil baffle 700 has an arc-shaped guide surface 710, and the arc-shaped guide surface 710 is located on one side of the annular oil baffle 700 close to the pin shaft 400 and is used for guiding the lubricating oil delivered from the second oil delivery hole 210 to the first bearing 110 into the main delivery section 411 of the first oil delivery hole 410.

Referring to fig. 2, further, the annular oil baffle 700 includes a plate body 720 and a positioning tube 730 connected to each other, the plate body 720 and the positioning tube 730 are both annular, and the arc-shaped guide surface 710 is disposed on the plate body 720, that is, a portion of one plate surface of the plate body 720 is set as the arc-shaped guide surface 710. The plate body 720 is connected with the planet carrier 300, and the positioning tube 730 is inserted into the first oil delivery hole 410; the arc-shaped guide surface 710 of the plate body 720 is used to guide the lubricant, that is, the lubricant contained in the plate body 720 can smoothly enter the positioning tube 730 along the arc-shaped guide surface 710 under the centrifugal force. Alternatively, the plate 720 and the planet carrier 300 may be fixedly connected by screws.

The reduction gearbox lubricating system provided by the embodiment has the advantages of good lubricating effect during operation of the gearbox, difficulty in failure, safety and reliability.

The embodiment also provides a high-rotating-speed electric vehicle reduction gearbox which comprises the reduction gearbox lubricating system of the embodiment, in the reduction gearbox operation process, lubricating oil can fully reach the positions of all parts in the gearbox, and the lubricating effect is good.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A reduction gearbox lubrication system, comprising:

the bearing box comprises a box shell, a bearing seat and a bearing seat, wherein the box shell is provided with a first bearing hole and a second bearing hole, and a first bearing and a second bearing are respectively arranged in the first bearing hole and the second bearing hole;

the central gear is rotatably arranged on the box shell;

2. The reduction gearbox lubrication system according to claim 1, wherein:

the annular oil baffle plate comprises a plate body and a positioning pipe which are connected, the plate body is connected with the planet carrier, and the positioning pipe is inserted into the first oil conveying hole; lubricating oil contained in the plate body can enter the positioning pipe under the action of centrifugal force.

3. A reduction gearbox lubrication system according to claim 2, characterised in that:

the plate body is provided with an arc-shaped guide surface, the arc-shaped guide surface extends in a necking shape from outside to inside towards one side far away from the first oil conveying hole, and the arc-shaped guide surface is used for guiding lubricating oil conveyed to the first bearing from the forced lubricating unit into the positioning pipe.

4. The reduction gearbox lubrication system according to claim 1, wherein:

the central gear is provided with a second oil conveying hole and a central oil conveying hole, an included angle is formed between the central oil conveying hole and the oil conveying direction of the second oil conveying hole, lubricating oil can enter the second oil conveying hole and the central oil conveying hole through the forced lubrication unit, the second oil conveying hole is used for conveying the lubricating oil to the first bearing, and the central oil conveying hole is used for conveying the lubricating oil to the planet wheel assembly.

5. The reduction gearbox lubrication system according to claim 4, wherein:

the planet wheel assembly comprises a planet gear and a pin shaft, the first oil delivery hole is formed in the pin shaft, and the pin shaft is fixedly connected with the planet carrier; the planetary gear comprises a first gear body and a second gear body which are coaxially arranged, the first gear body and the second gear body are sleeved outside the pin shaft, the first gear body is meshed with the central gear, and the second gear body is meshed with the gear ring.

6. The reduction gearbox lubrication system according to claim 5, wherein:

the planet carrier is provided with a first guide inclined plane and a second guide inclined plane, an included angle is formed between the first guide inclined plane and the second guide inclined plane, and the first guide inclined plane is used for guiding lubricating oil output from the central oil conveying hole to the first gear body; the second guide slope is used for guiding the lubricating oil output from the central oil delivery hole to the second gear body.

7. The reduction gearbox lubrication system according to claim 5, wherein:

the first oil conveying hole comprises a main conveying section and a plurality of auxiliary conveying sections, one end of the main conveying section extends to the end face of the pin shaft, one ends of the auxiliary conveying sections are communicated with the main conveying section, and the other ends of the auxiliary conveying sections extend to the outer peripheral face of the pin shaft.

8. The reduction gearbox lubrication system according to claim 1, wherein:

and a third oil delivery hole is formed in the planet carrier and used for guiding the lubricating oil flowing through the planet wheel assembly to the position of the second bearing.

9. The reduction gearbox lubrication system according to claim 1, wherein:

the bottom of case shell is provided with the oil drain hole, the oil level of the inside lubricating oil of oil drain hole control box shell floats and is in the planet wheel subassembly and annular oil baffle extreme lower position department.

10. The reduction gearbox lubrication system according to claim 9, wherein:

the box shell is provided with a box cover and a box body which are connected, and the second bearing hole is formed in the box body; the box cover is provided with a central cylinder part, a first annular plate part, a second annular plate part and a third annular plate part which are integrated, the first annular plate part is parallel to the second annular plate part, the inner edge of the second annular plate part is connected with the first annular plate part, the outer edge of the second annular plate part is connected with the third annular plate part, the second annular plate part and the first annular plate part and the second annular plate part form an included angle, and the first bearing hole is formed in the central cylinder part; the oil drain hole is provided in an outer edge of the third annular plate portion; the cross-sectional area of the inner wall surface of the second annular plate portion is gradually reduced towards the direction far away from the planet carrier, and an annular channel is defined by the second annular plate portion and the planet carrier in a spaced mode; wherein the cross-section is a plane perpendicular to the first bearing bore.