CN217481912U - High-speed planetary gear box of electric automobile - Google Patents

Abstract

The application provides a high-speed planetary gear box of an electric automobile, which relates to the technical field of transmission and comprises a planetary carrier and an oil collecting baffle plate; the planet carrier comprises a front side plate, a connecting piece and a rear side plate which are sequentially connected, wherein the front side plate is used for positioning the sun wheel, and the rear side plate is used for outputting torque; one side that the posterior lateral plate deviates from preceding curb plate has the annular flange of arranging around the axis of planet carrier, and the oil collecting baffle is connected with the annular flange, and one side that the annular flange of oil collecting baffle protrusion is close to the axis of planet carrier to make oil collecting baffle and posterior lateral plate inject the oil trap jointly. The gear box that this embodiment provided, the shaping is fluted on the planet frame, utilizes recess and the cooperation of collection oil baffle to form the oil trap, need not process the depressed part on collection oil baffle, has reduced the processing degree of difficulty, has reduced manufacturing cost.

Description

High-speed planetary gear box of electric automobile

Technical Field

The utility model relates to the field of transmission technology, particularly, relate to a high-speed planetary gear case of electric automobile.

Background

At present, the planet wheel inner bearing of the planet row rotates at a high speed along with the planet carrier and is positioned in the structure, sufficient lubrication is difficult, and a corresponding lubricating design needs to be carried out so as to meet the working requirement of high load and high rotating speed. In the prior art, in order to fully lubricate the inner bearing of the traveling wheel, an oil collecting ring is generally arranged on the output side of the planet carrier, and oil is guided to the inner bearing of the planet wheel after the oil is collected by the oil collecting ring, so that the inner bearing of the planet wheel is lubricated.

The inventor researches and discovers that the lubricating structure design for lubricating the planet wheel inner bearing in the prior art has the following defects:

the oil collecting ring has complex structure, inconvenient processing and high manufacturing cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high-speed planetary gear of electric automobile, it can.

The embodiment of the utility model is realized like this:

the utility model provides a high-speed planetary gear of electric automobile, include:

a planet carrier and an oil collecting baffle plate; the planet carrier is including the preceding curb plate, connecting piece and the posterior lateral plate that connect gradually, the preceding curb plate is used for fixing a position the sun gear, the posterior lateral plate is used for the output torque, the posterior lateral plate deviates from one side of preceding curb plate has the center on the annular flange that the axis of planet carrier was arranged, the collection oil baffle with the annular flange is connected, just the collection oil baffle protrusion the annular flange is close to one side of the axis of planet carrier, so that the collection oil baffle with the oil trap is injectd jointly to the posterior lateral plate.

In an alternative embodiment, the oil collection baffle is provided as an annular flat plate.

In an optional embodiment, the connecting piece is provided with a weight-reducing oil-throwing groove, and a notch of the weight-reducing oil-throwing groove is arranged on one side of the front side plate, which is far away from the rear side plate, or on one side of the rear side plate, which is far away from the front side plate.

In an alternative embodiment, the cross-sectional area of the weight-reducing oil slinger increases gradually in a direction from the groove bottom of the weight-reducing oil slinger towards the notch.

In an optional embodiment, the high-speed planetary gearbox of the electric vehicle further comprises a planetary shaft, one end of the planetary shaft penetrates through the rear side plate and abuts against the front side plate, and the other end of the planetary shaft abuts against the oil collecting baffle plate.

In an optional implementation mode, a positioning groove is formed in one side face, close to the rear side plate, of the front side plate, the planet shaft is inserted into the positioning groove, and the end face of the planet shaft is abutted to the bottom wall of the positioning groove.

In an optional embodiment, a positioning hole is arranged on the rear side plate, and the positioning hole is positioned on one side of the annular rib close to the axis of the planet carrier; an avoidance notch is formed in one side, close to the axis of the planet carrier, of the annular blocking edge and is communicated with the positioning hole; the planet shaft penetrates through the positioning hole and the avoiding notch at the same time.

In an optional embodiment, the planet shaft comprises a shaft main body and a boss which are connected, the shaft main body is arranged in the positioning hole in a penetrating mode, and one end, far away from the boss, of the shaft main body is abutted to the front side plate; the boss is located dodge in the breach, just the boss is kept away from one side of axle main part with collect oil baffle butt.

In an alternative embodiment, the shaft main body is provided as a hollow shaft, and an oil drain through hole communicating with the center hole of the shaft main body is provided on a peripheral wall of the shaft main body.

In an alternative embodiment, the front side plate, the connector and the rear side plate are provided as a unitary structure.

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

in conclusion, the high-speed planetary gear box of electric automobile that this embodiment provided, through set up annular flange on the posterior lateral plate, annular flange arranges around the axis of planet carrier for a lateral surface that the anterior lateral plate was kept away from to the posterior lateral plate has formed the recess. The oil collecting baffle is assembled on the annular baffle, the oil collecting baffle protrudes out of one side of the annular baffle close to the axis of the planet carrier, namely, the part of the oil collecting baffle extends into the region surrounded by the groove, and a distance is reserved between the part of the oil collecting baffle extending into the region surrounded by the groove and the bottom wall of the groove, so that the oil collecting groove is defined by the oil collecting baffle and the rear side plate together. Because the groove is formed in the rear side plate, the oil collecting baffle can be designed to be a flat plate, the oil collecting groove can be formed in the groove after the oil collecting baffle is assembled with the rear side plate, a concave part does not need to be punched on the oil collecting baffle, the processing difficulty of the oil collecting baffle is reduced, and the manufacturing cost is reduced.

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 cross-sectional structural diagram of a view angle of an electric vehicle high-speed planetary gearbox according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structural diagram of another view angle of the electric vehicle high-speed planetary gearbox according to the embodiment of the present invention;

fig. 3 is a schematic cross-sectional structural diagram of a planet carrier, a planet wheel and an oil collecting baffle plate according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structural view of a planet carrier, a planet shaft and an oil collecting baffle according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional structural diagram of a planet carrier according to an embodiment of the present invention;

fig. 6 is an axial structural schematic diagram of a planet carrier according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a planet shaft according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a viewing angle at which the planet carrier and the planet shaft are engaged according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of another view angle of the embodiment of the present invention, wherein the planet carrier is engaged with the planet shaft.

Icon:

001-an oil sump; 100-a planet carrier; 110-front side panel; 111-a positioning slot; 120-a connector; 121-weight reduction and oil throwing groove; 130-rear side panel; 131-positioning holes; 140-annular rib; 141-avoiding a notch; 150-a groove; 200-an oil collecting baffle; 300-planet axis; 310-a shaft body; 311-oil collecting cavity; 312-oil drain through hole; 320-boss; 400-a planet wheel; 500-set screws; 600-a box shell; 700-inner gear ring; 800-sun gear; 900-output flange.

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 the embodiments of the present invention 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 of the present invention, all other embodiments obtained by a person skilled in the art without making 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 as a specific case by those skilled in the art.

At present, in order to lubricate a planetary gear and related components in a gear box, an oil collecting ring is required to be installed on a planet carrier, an inner concave part is arranged on the oil collecting ring, one side of the oil collecting ring, which is provided with the inner concave part, is attached to the planet carrier, the oil collecting ring rotates along with the planet carrier, oil can be collected at the inner concave part, and then the oil flows to the position of the planetary gear from the inner concave part, so that the planetary gear and the related components are lubricated. The oil collecting ring has complex structure, inconvenient processing and high manufacturing cost.

In view of this, a designer designs a high-speed planetary gearbox for an electric vehicle, wherein a groove 150 is formed on a planet carrier 100, and an oil collecting groove 001 is formed by matching the groove 150 with an oil collecting baffle 200, so that a concave part does not need to be processed on the oil collecting baffle 200, the processing difficulty is reduced, and the manufacturing cost is reduced.

Referring to fig. 1 to 4, in the present embodiment, the high-speed planetary gearbox of the electric vehicle includes a planet carrier 100, an oil collecting baffle 200, a planet shaft 300, and planet wheels 400. Planet carrier 100 is including the preceding curb plate 110, connecting piece 120 and the posterior lateral plate 130 that connect gradually, preceding curb plate 110 is used for fixing a position sun gear 800, posterior lateral plate 130 is used for the output torque, one side that posterior lateral plate 130 deviates from preceding curb plate 110 has the annular flange 140 of arranging around the axis of planet carrier 100, oil collecting baffle 200 is connected with annular flange 140, and one side that oil collecting baffle 200 protrusion annular flange 140 is close to the axis of planet carrier 100, so that oil collecting baffle 200 and posterior lateral plate 130 inject oil trap 001 jointly. The planetary gear 400 is rotatably mounted on the planetary carrier 100 by a planetary shaft 300, and the planetary gear 400 is located between the front side plate 110 and the rear side plate 130.

The working principle of the high-speed planetary gearbox of the electric automobile provided by the embodiment is as follows:

during the operation of the gearbox, oil enters an oil collecting groove 001 defined by the oil collecting baffle 200 and the rear side plate 130 together, and then enters the positions of the planet wheels 400, the bearings and the like from the oil collecting groove 001 to lubricate the parts of the planet wheels 400, the bearings and the like. The lubricated oil liquid flows back to an oil storage pool at the bottom in the gear box under the action of gravity, and can participate in the next lubrication circulation. Because the oil storage tank is injectd jointly for posterior lateral plate 130 and oil collecting baffle 200 and obtains, also be formed with recess 150 in one side that posterior lateral plate 130 deviates from preceding lateral plate 110, oil collecting baffle 200 is connected the back with posterior lateral plate 130, and oil collecting baffle and posterior lateral plate 130 can make the subregion of recess 150 form oil collecting tank 001, need not set up the depressed part at oil collecting baffle 200 again, and oil collecting baffle 200 can set up to the annular flat board, and the processing degree of difficulty is low, low in manufacturing cost.

In this embodiment, optionally, the front side plate 110, the connecting member 120, and the rear side plate 130 may be formed as an integral structure, for example, the front side plate 110, the connecting member 120, and the rear side plate 130 are formed by integral casting. Moreover, the annular rib 140 is a part of the rear side plate 130, that is, the rear side plate 130 can be provided with the annular rib 140 after being molded, so that the planet carrier 100 is convenient to process, compact in overall structure and high in processing efficiency.

It should be noted that the front side plate 110 and the rear side plate 130 are both provided as annular plates, a central hole on the front side plate 110 is used for assembling and positioning a bearing of the sun gear 800, and a central hole on the rear side plate 130 is used for connecting with an actuating member, so as to transmit torque to the actuating member. In addition, the number of the connecting members 120 is plural, and the plurality of connecting members 120 are uniformly arranged around the rotation axis of the planet carrier 100 at intervals, in this embodiment, the number of the connecting members 120 is not specifically limited, and the structural strength of the planet carrier 100 can be ensured.

Please refer to fig. 5, further, one side of the front side plate 110 facing the rear side plate 130 is provided with a plurality of positioning grooves 111, the positioning grooves 111 are circular grooves, the number of the positioning grooves 111 is equal to the number of the planet shafts 300 on which the planet wheels 400 are mounted, and the positioning grooves 111 are used for the insertion of the planet shafts 300, so that the size of the positioning grooves 111 matches with the size of the corresponding planet shafts 300, and the planet shafts 300 and the positioning grooves 111 can be in interference fit, thereby improving the stability of the whole structure. It should be noted that, a plurality of constant head tank 111 arrange around the even interval of planet carrier 100's axis of rotation, and a plurality of constant head tank 111 and a plurality of connecting piece 120 arrange in turn, and is rationally distributed, mutually noninterfere.

Referring to fig. 3, further, the connecting member 120 is provided with a weight-reducing oil-throwing groove 121, the weight-reducing oil-throwing groove 121 is provided as a tapered groove, the diameter of the weight-reducing oil-throwing groove 121 is gradually increased from the groove bottom to the notch, the notch of the weight-reducing oil-throwing groove 121 is provided on one side of the front side plate 110 away from the rear side plate 130 or on one side of the rear side plate 130 away from the front side plate 110, that is, the notch of the weight-reducing oil-throwing groove 121 on the connecting member 120 can be provided as required, moreover, when the number of the connecting elements 120 is plural, the orientations of the notches of the weight-reducing and oil-throwing grooves 121 of the connecting elements 120 may be different, that is, the notches of the weight-reducing and oil-throwing grooves 121 of some of the connecting elements 120 in the connecting elements 120 are away from the front side plate 110, and the notches of the weight-reducing and oil-throwing grooves 121 of the rest of the connecting elements 120 in the connecting elements 120 are away from the rear side plate 130, so that the oil can be conveyed to different positions, thereby improving the lubricating effect and the lubricating effect. In addition, the planet carrier 100 is formed by casting, and after the mold is opened, the weight reducing and oil throwing groove 121 just has a certain drawing angle, so that the weight reducing and oil throwing groove 121 is a conical groove, and the processing is convenient. In the rotating process of the planet carrier 100, at least part of notches of the weight-reducing and oil-throwing oil grooves 121 on the connecting piece 120 are located in an oil storage pool at the bottom in the gearbox, so that part of oil can enter the weight-reducing and oil-throwing oil grooves 121, and along with the rotation of the planet carrier 100, the oil in the weight-reducing and oil-throwing oil grooves 121 can be thrown out of the notches to lubricate related parts. And because the weight-reducing oil slinger 121 is a conical groove, oil is favorably thrown out from the notch of the weight-reducing oil slinger 121.

Referring to fig. 5 and fig. 6, optionally, the rear side plate 130 is provided with a positioning hole 131, and the positioning hole 131 penetrates through the bottom wall of the groove 150, in other words, the positioning hole 131 is located on one side of the annular rib 140 close to the rotation axis of the planet carrier 100, and is located in an area surrounded by the annular rib 140. The number of the positioning holes 131 is equal to the number of the planet shafts 300, and the positioning holes 131 and the corresponding positioning grooves 111 are matched together to position one planet shaft 300. Meanwhile, the annular baffle is provided with the avoidance notches 141 with the same number as the positioning holes 131, each avoidance notch 141 is an arc-shaped notch, each avoidance notch 141 is communicated with a corresponding positioning hole 131, the orthographic projections of the avoidance notches 141 and the corresponding positioning holes 131 in the axial extension direction of the positioning holes 131 are circular, the circular shapes are coaxial with the corresponding positioning grooves 111, and the planet shafts 300 are simultaneously inserted into the positioning holes 131 and the avoidance notches 141.

Referring to fig. 7, the planet axle 300 may optionally include an axle body 310 and a boss 320 of unitary construction. The shaft main body 310 is a hollow shaft, that is, the shaft main body 310 is provided with a central through hole, which is a cylindrical hole, and the axis through hole is coaxially disposed with the shaft main body 310. The shaft main body 310 has a first end face and a second end face in the axial direction, the boss 320 is an arc-shaped strip, the boss 320 is arranged on the second end face, the concave arc face of the boss 320 and the hole wall of the central through hole are located on the same cylindrical surface, and the convex arc face of the boss 320 and the outer peripheral face of the shaft main body 310 are located on the same cylindrical surface. It should be noted that the shaft main body 310 is further provided with a plurality of oil drain through holes 312 communicated with the central through hole, and the oil drain through holes 312 are uniformly arranged at intervals in the circumferential direction of the shaft main body 310, and the central through hole of the shaft main body 310 may also be referred to as an oil collecting cavity 311. The shaft main body 310 is inserted into the positioning hole 131, one end of the shaft main body 310, which is far away from the boss 320, is inserted into the positioning groove 111, and the first end surface is abutted against the bottom wall of the positioning groove 111. With reference to fig. 8 to 9, the shape of the boss 320 is the same as that of the avoiding notch 141, the boss 320 is located in the avoiding notch 141, and the boss 320 can fill the area of the annular rib 140, which is processed with the avoiding notch 141, so that the boss 320 and the annular rib 140 jointly form the annular rib 140. After the oil collecting baffle plate 200 is connected with the rear side plate 130, the oil collecting baffle plate 200 is abutted to one side of the boss 320 far away from the shaft main body 310, so that the two ends of the planet shaft 300 in the axial direction are limited by the front side plate 110 and the oil collecting baffle plate 200 respectively, the planet shaft 300 is not easy to displace and loosen in the axial direction, and the structure of the planet shaft 300 assembled with the planet carrier 100 is firmer and more reliable. Moreover, due to the structural design of the boss 320, the boss 320 only occupies the area where the avoiding notch 141 is located, and the boss 320 does not extend into the oil collecting tank 001, so that the oil collecting effect of the oil collecting tank 001 cannot be influenced, and the oil cannot enter the shaft main body 310. Simultaneously, the oil collecting baffle 200 and the boss 320 butt, the oil collecting baffle 200 both had played the effect of gathering oil, still played the effect of restriction planet axle 300 axial displacement, and the function is diversified, and the machine oil baffle still can not block one side that the front side board 110 was kept away from to the central through-hole, can not influence during fluid enters into the central through-hole, can not influence the lubrication to parts such as planet wheel 400 and bearing.

Referring to fig. 3 or fig. 4, in this embodiment, optionally, the oil collecting baffle 200 is an annular flat plate, which has a regular structure and is convenient for processing and manufacturing. And, be provided with a plurality of fixed orificess on the collection oil baffle 200, a plurality of fixed orificess are evenly spaced in collection oil baffle 200's circumference and are arranged, it is corresponding, be provided with a plurality of screw holes on the annular flange 140, behind collection oil baffle 200 and the laminating of annular flange 140, a plurality of fixed orificess and a plurality of screw hole one-to-one respectively intercommunication on collection oil baffle 200, utilize set screw 500 to pass fixed orifices and screw hole spiro union, thereby realize collection oil baffle 200 and annular flange 140's fixed connection, easy dismounting. The oil collecting baffle 200 and the annular rib 140 are fixed by the plurality of fixing screws 500 in a matched mode, so that the oil collecting baffle 200 is stable in structure, and the planetary shaft 300 can be prevented from being loosened axially.

In the operation process of the high-speed upper planetary gear box of the electric automobile provided by the embodiment, the oil collecting tank 001 can guide collected oil into the central through hole of the planetary shaft 300, and then the collected oil enters the bearing sleeved outside the planetary shaft 300 from the oil discharge through hole 312 on the planetary shaft 300 to lubricate the bearing, and the collected oil flows through the bearing and then is discharged from the end face of the planetary gear 400 to lubricate the meshing position of the planetary gear 400 and the sun gear 800. Meanwhile, in the process of high-speed rotation of the planet carrier 100, when the connecting piece 120 passes through an oil storage pool in the gear box, at least part of the notch in the weight-reducing oil-throwing groove 121 on the connecting piece 120 is immersed in oil and carries the oil to rotate together, when the oil rotates along with the connecting piece 120, the oil can flow towards the notch along the groove wall of the weight-reducing oil-throwing groove 121 and is finally thrown out of the notch to lubricate related components, and therefore, in the process of operation of the gear box, all the components are good in lubricating effect. Moreover, the oil collecting groove 001 is formed by jointly limiting the oil collecting baffle 200 and the rear side plate 130, the oil collecting baffle 200 is an annular flat plate, an inner concave part does not need to be machined, machining difficulty is reduced, and the oil collecting groove can be matched with the boss 320 on the planet shaft 300 to play a role in limiting axial and circumferential movement of the planet shaft 300. Wherein, the first terminal surface of planet axle 300 and the laminating of the tank bottom wall of constant head tank 111, and planet axle 300 and constant head tank 111 interference fit, simultaneously, planet axle 300 passes the locating hole 131 and with locating hole 131 interference fit, the boss 320 butt on oil collection baffle 200 and the planet axle 300, so, the spacing of planet axle 300 axial and circumference is effectual.

Referring to fig. 1 or fig. 2, it should be understood that the high-speed planetary gearbox of the electric vehicle provided in this embodiment further includes a housing 600, an inner gear ring 700, a sun gear 800, an output flange 900, and the like, which are not listed in this embodiment. The ring gear 700 is fixed in the case 600, the planet carrier 100 is arranged in the case 600, and a plurality of planet gears are uniformly distributed around the sun gear 800 and are all meshed with the sun gear 800; the plurality of planetary gears are also simultaneously engaged with the ring gear 700; the output flange 900 is fixedly connected to the rear plate 130. The sun gear 800 is connected with an output shaft of the motor, and the sun gear 800 rotates to drive the planet gear 400 to rotate, so that the planet carrier 100 is driven to rotate through the rotation of the planet gear 400 relative to the inner gear ring 700, and the torque is output through the output flange 900.

The high-speed planetary gear box of electric automobile that this embodiment provided, rational in infrastructure, processing low in manufacturing cost, and the inside lubricated effectual of each moving part of gear box, the operation is reliable and stable.

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 (10)

1. A high-speed planetary gearbox of an electric automobile is characterized by comprising:

a planet carrier and an oil collecting baffle; the planet carrier comprises a front side plate, a connecting piece and a rear side plate which are sequentially connected, wherein the front side plate is used for positioning the sun gear, and the rear side plate is used for outputting torque; one side that the posterior lateral plate deviates from preceding curb plate has around the annular flange that the axis of planet carrier was arranged, the collection oil baffle with the annular flange is connected, just the collection oil baffle protrusion the annular flange is close to one side of the axis of planet carrier, so that the collection oil baffle with the oil trap is injectd jointly to the posterior lateral plate.

2. The high-speed planetary gearbox of electric vehicle as set forth in claim 1, wherein:

the oil collecting baffle is an annular flat plate.

3. The high-speed planetary gearbox of electric vehicle as set forth in claim 1, wherein:

the connecting piece is provided with subtracts heavy oil groove of getting rid of, subtract heavy oil groove's notch and locate the preceding curb plate deviates from one side of posterior lateral plate or locate the posterior lateral plate deviates from one side of preceding curb plate.

4. The high-speed planetary gearbox of electric vehicle as set forth in claim 3, wherein:

the cross-sectional area of the weight reducing and oil throwing groove is gradually increased from the groove bottom of the weight reducing and oil throwing groove to the direction of the notch.

5. The high-speed planetary gearbox of electric vehicle as set forth in claim 1, wherein:

the high-speed planetary gear box of electric automobile still includes the planet axle, the one end of planet axle run through the posterior lateral plate and with preceding curb plate butt, the other end of planet axle with the oil collection baffle butt.

6. The high-speed planetary gearbox of an electric vehicle as set forth in claim 5, wherein:

the side surface of the front side plate, which is close to the rear side plate, is provided with a positioning groove, the planet shaft is inserted into the positioning groove, and the end surface of the planet shaft is abutted to the bottom wall of the positioning groove.

7. The high-speed planetary gearbox of electric vehicle as set forth in claim 5, wherein:

the rear side plate is provided with a positioning hole, and the positioning hole is positioned on one side of the annular flange close to the axis of the planet carrier; an avoidance notch is formed in one side, close to the axis of the planet carrier, of the annular flange and is communicated with the positioning hole; the planet shaft penetrates through the positioning hole and the avoiding notch at the same time.

8. The high-speed planetary gearbox of an electric vehicle as claimed in claim 7, wherein:

the planet shaft comprises a shaft main body and a boss which are connected, the shaft main body is arranged in the positioning hole in a penetrating mode, and one end, far away from the boss, of the shaft main body is abutted to the front side plate; the boss is located dodge in the breach, just the boss is kept away from one side of axle main part with the butt of collection oil baffle.

9. The high-speed planetary gearbox of electric vehicle as set forth in claim 8, wherein:

the shaft main body is a hollow shaft, and an oil discharge through hole communicated with the central hole of the shaft main body is formed in the peripheral wall of the shaft main body.

10. The high-speed planetary gearbox of an electric vehicle according to any one of claims 1 to 9, wherein:

the front side plate, the connecting piece and the rear side plate are of an integrated structure.

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