CN218913689U

CN218913689U - Lubricating oil conveying structure for speed reducer

Info

Publication number: CN218913689U
Application number: CN202223323442.9U
Authority: CN
Inventors: 谭建; 王章钊
Original assignee: Mianyang Fulin Jinggong Co ltd
Current assignee: Mianyang Fulin Jinggong Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-04-25
Anticipated expiration: 2032-12-12

Abstract

The utility model relates to the technical field of automobile reduction boxes, and discloses a lubricating oil conveying structure for a speed reducer, which comprises a speed reducer shell, an oil pump, an oil duct and an oil injection ring; the oil duct is arranged on the speed reducer shell, the oil pump is arranged at the lubricating oil inlet, one end of the oil duct is connected with the oil pump outlet, the other end of the oil duct is communicated with the oil injection ring, the oil duct further comprises an annular cooling plate arranged between the speed reducer shell and the stator, and a plurality of cooling oil grooves are formed in the inner wall of the annular cooling plate; the cooling oil groove is communicated with the oil duct, and lubricating oil in the oil duct flows through the outer surface of the stator through the cooling oil groove and reaches a closed cavity formed between the oil injection ring and the reducer shell. According to the utility model, the plurality of cooling oil grooves are added on the basis of the existing oil duct, so that the contact area of lubricating oil and a motor stator is increased, the cooling is more sufficient, and the problem that the cooling effect of the existing lubricating oil conveying structure on the motor stator is poor is solved.

Description

Lubricating oil conveying structure for speed reducer

Technical Field

The utility model relates to the technical field of automobile reduction boxes, in particular to a lubricating oil conveying structure for a speed reducer.

Background

With the popularization of electric vehicles, the integrated structure of a motor and a speed reducer is more and more, and the cooling mode of a motor stator and a motor rotor is gradually changed from direct cooling of cooling water to lubricating oil cooling.

The lubricating oil is cooled from the lubricating oil conveying structure to the rotor and the stator, the lubricating oil conveying structure comprises an oil pump, an oil duct and an oil spraying ring, the lubricating oil is sucked by the oil pump and conveyed to the oil spraying ring through the oil duct, and the stator is cooled by spraying holes on the oil spraying ring. The oil duct is arranged on the speed reducer shell and is formed by connecting a plurality of pipelines in different directions, so that a shell joint surface is formed at the joint of two adjacent pipelines on the speed reducer shell.

The existing lubricating oil conveying structure has the following defects:

1) The stator and the rotor of the motor are cooled through the oil injection ring, so that the contact area of lubricating oil and the stator is small, and the problem of poor stator cooling effect is caused;

2) The joint surface of the shell prevents oil in the oil duct from exuding through the sealant, but the situation that lubricating oil seeps out of the shell and oil leakage occurs cannot be avoided;

3) Suction often occurs at the oil inlet of the oil pump.

Disclosure of Invention

The utility model aims to provide a lubricating oil conveying structure for a speed reducer, which aims to solve the problem that the existing lubricating oil conveying structure has poor cooling effect on a motor stator.

The utility model is realized by the following technical scheme:

a lubricating oil conveying structure for a speed reducer comprises a speed reducer shell, an oil pump, an oil duct and an oil injection ring; the oil duct is arranged on the speed reducer shell, the oil pump is arranged at the lubricating oil inlet, one end of the oil duct is connected with the oil pump outlet, the other end of the oil duct is communicated with the oil injection ring, the oil duct further comprises an annular cooling plate arranged between the speed reducer shell and the stator, and a plurality of cooling oil grooves are formed in the inner wall of the annular cooling plate; the cooling oil groove is communicated with the oil duct, and lubricating oil in the oil duct flows through the outer surface of the stator through the cooling oil groove and reaches a closed cavity formed between the oil injection ring and the reducer shell.

According to the utility model, a plurality of cooling oil grooves are added on the basis of the existing oil passage, lubricating oil enters the cooling oil grooves through the oil passage, flows through the outer surface of the stator through the cooling oil grooves, reaches into a closed cavity formed between the oil injection ring and the reducer shell, and finally is injected onto the stator through injection holes on the oil injection ring, so that the cooling of the whole stator is completed.

The utility model increases the contact area of the lubricating oil and the motor stator by adding a plurality of cooling oil grooves on the basis of the existing oil duct, so that the cooling is more sufficient, and the problem that the cooling effect of the existing lubricating oil conveying structure on the motor stator is poor is solved.

Further, the plurality of cooling oil grooves are uniformly spaced.

Further, be provided with the annular pipeline that is used for a plurality of cooling oil grooves of intercommunication on the annular cooling plate, annular pipeline is connected with the oil duct for guide into each cooling oil groove with the lubricating oil in the oil duct.

Further, the two axial ends of the annular cooling plate are folded inwards along the radial direction to form an annular baffle, and the inner wall of the annular baffle is in contact with the outer wall of the oil injection ring.

Further, the oil duct is formed by connecting a plurality of pipelines arranged on the reducer shell.

Further, the oil duct for cooling the stator comprises a pipeline A, a pipeline B, a pipeline C, a pipeline D, a pipeline E, a pipeline F, an oil distributing cavity, a pipeline G, a pipeline H, a pipeline I and a pipeline J which are connected in sequence; wherein, pipeline A is connected with the oil pump outlet, and pipeline J is connected with the cooling oil groove.

Further, a heat exchanger is provided between the pipe E and the pipe F.

Further, both ends of the oil distributing cavity are respectively connected with a pipeline G and a pipeline K, lubricating oil flowing into the pipeline G is used for cooling a stator, and lubricating oil flowing into the pipeline K is used for cooling a rotor.

Further, an anti-seepage oil groove is arranged on a shell joint surface formed at the joint of two adjacent pipelines, is arranged outside the pipeline opening and is communicated with the inner side of the speed reducer shell, and is used for guiding lubricating oil oozing out from the pipeline opening into the inner side of the speed reducer shell.

Further, an oil baffle plate is arranged at the oil suction inlet of the oil pump on the speed reducer shell, and a gap is reserved between the oil baffle plate and the speed reducer shell.

The lubricating oil enters the oil pump through the gap; the oil baffle plate can effectively prevent the oil pump from sucking, so that the conditions of insufficient lubrication and damage to the oil pump occur.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. according to the utility model, the plurality of cooling oil grooves are added on the basis of the existing oil duct, so that the contact area of lubricating oil and a motor stator is increased, the cooling is more sufficient, and the cooling effect on the stator is improved.

2. According to the utility model, when the oil passage passes through the combination surface of the shell, the anti-seepage oil groove is arranged at the outer side of the pipeline opening, so that oil seeped out of the combination surface of the shell flows back to the inner side of the shell of the speed reducer through the anti-seepage oil groove.

3. According to the utility model, the oil baffle plate is added at the oil suction inlet of the oil pump, so that the condition of insufficient lubrication and damage to the oil pump is prevented.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model. In the drawings:

FIG. 1 is a front view of a decelerator;

FIG. 2 is a cross-sectional view taken along line C-C of FIG. 1;

FIG. 3 is a sectional view taken along the direction D-D in FIG. 1;

FIG. 4 is a sectional view taken along the direction E-E in FIG. 1;

FIG. 5 is a bottom view of FIG. 1;

FIG. 6 is a cross-sectional view taken along B-B in FIG. 5;

FIG. 7 is a cross-sectional view taken along the direction F-F in FIG. 5;

FIG. 8 is a partial cross-sectional view of a first reduction gear;

FIG. 9 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 8;

fig. 10 is a partial cross-sectional view of a second reduction gear.

In the drawings, the reference numerals and corresponding part names:

1-a reducer housing; 2-stator; 3-an oil injection ring; 4-a cooling oil tank; 5-pipe J; 6-pipeline I; 7-a pipeline H; 8-pipe G; 9-oil separating cavities; 10-pipeline K; 11-an oil baffle plate; 12-pipe a; 13-pipe B; 14-pipe C; 15-pipe D; 16-annular pipe; 17-a lube inlet; 18-an oil pump; 19-an anti-seepage oil groove; 20-pipe E; 21-a heat exchanger; 22-pipe F.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.

Example 1:

as shown in fig. 1 to 10, a lubricating oil conveying structure for a speed reducer comprises a speed reducer shell 1, an oil pump 18, an oil duct and an oil spray ring 3, wherein the oil spray ring 3 is provided with spray holes, and lubricating oil is sprayed to a stator through the spray holes for cooling; the oil duct is arranged on the reducer casing 1, namely, a channel for conveying lubricating oil is arranged on the side wall of the reducer casing 1, the channel is an oil duct, the oil duct is formed by connecting a plurality of pipelines arranged on the reducer casing 1, the joint of two adjacent pipelines forms a shell joint surface, the oil pump 18 is arranged at the lubricating oil inlet 17, one end of the oil duct is connected with the outlet of the oil pump 18, the other end of the oil duct is communicated with the oil injection ring 3, the oil duct further comprises an annular cooling plate arranged between the reducer casing 1 and the stator 2, the inner wall of the annular cooling plate is provided with a plurality of cooling oil grooves 4, and the opening of the cooling oil grooves 4 faces the stator 2; the cooling oil groove 4 is communicated with the oil duct, lubricating oil in the oil duct flows through the outer surface of the stator 2 through the cooling oil groove 4, reaches a closed cavity formed between the oil injection ring 3 and the reducer casing 1, the quantity of the cooling oil groove 4 can be adjusted according to actual conditions, and the cooling oil groove 4 can cool the stator 2.

Lubricating oil is sucked into the oil duct at the lubricating oil inlet 17 by the oil pump 18, enters the cooling oil groove 4 through the oil duct, flows through the outer surface of the stator 2 through the cooling oil groove 4, reaches into a closed cavity formed between the oil injection ring 3 and the reducer casing 1, and finally is injected onto the stator 2 through the injection hole on the oil injection ring 3, so that the cooling of the whole stator 2 is completed.

The present embodiment can increase the contact area of the lubricating oil and the stator 2 by providing the cooling oil groove 4, thereby improving the cooling effect on the stator.

The oil passages comprise an oil passage for cooling the rotor and an oil passage for cooling the stator 2, wherein the oil passage for cooling the stator 2 comprises a pipeline A12, a pipeline B13, a pipeline C14, a pipeline D15, a pipeline E20, a pipeline F22, a oil distributing cavity 9, a pipeline G8, a pipeline H7, a pipeline I6 and a pipeline J5 which are connected in sequence; wherein, the pipeline A12 is connected with the outlet of the oil pump 18, the pipeline J5 is communicated with the cooling oil groove 4, and a heat exchanger 21 is arranged between the pipeline E20 and the pipeline F22; the two ends of the oil distributing cavity 9 are respectively connected with a pipeline G8 and a pipeline K10, the lubricating oil flowing into the pipeline G8 is used for cooling the stator 2, and the lubricating oil flowing into the pipeline K10 is used for cooling the rotor.

In order to realize that one pipeline J5 is communicated with a plurality of cooling oil grooves 4, an annular pipeline 16 for communicating the plurality of cooling oil grooves 4 is arranged on the annular cooling plate, the annular pipeline 16 is connected with the pipeline J5 and used for guiding lubricating oil in an oil duct into each cooling oil groove 4, the lubricating oil enters the annular pipeline 16, then the lubricating oil is guided into the plurality of cooling oil grooves 4 through the annular pipeline 16, and finally the lubricating oil is guided into the outer surface of the stator 2 through the cooling oil grooves 4.

In a preferred case, several cooling oil tanks 4 are evenly spaced apart with the pipes J5.

In a preferred case, the two axial ends of the annular cooling plate are folded inwards along the radial direction to form an annular baffle, the inner wall of the annular baffle is in contact with the outer wall of the oil injection ring 3, and the arrangement of the annular baffle can ensure that lubricating oil led into the outer surface of the stator 2 from the cooling oil groove 4 smoothly enters a closed cavity formed between the oil injection ring 3 and the speed reducer shell 1.

Example 2:

as shown in fig. 1 to 10, this embodiment is based on embodiment 1, an oil-impermeable groove 19 is provided on the joint surface of the casing formed at the joint of two adjacent pipes, and the oil-impermeable groove 19 is provided outside the pipe orifice and communicates with the inside of the reducer casing 1 for introducing lubricating oil oozing out from the pipe orifice into the inside of the reducer casing 1.

When the lubricating oil passes through the shell joint surface through the oil duct, the lubricating oil inevitably has oil seepage on the shell joint surface due to the fact that the pressure in the oil duct is large, one part of the lubricating oil can directly seep into the interior of the speed reducer shell 1 (the use cannot be affected), the rest of the lubricating oil can seep into the anti-seepage oil groove 19 through the shell joint surface, and the lubricating oil is guided into the interior of the speed reducer shell 1 through the anti-seepage oil groove 19. Thereby completely avoiding the situation that the lubricating oil seeps out of the inside of the reducer casing 1.

Example 3:

as shown in fig. 1 to 10, the present embodiment is based on embodiment 1 or embodiment 2, and an oil baffle plate 11 is provided on the speed reducer housing 1 at the oil suction inlet of the oil pump, and a gap is provided between the oil baffle plate 11 and the speed reducer housing 1.

Under the condition that the oil baffle 11 is not added, the height of an oil suction port (round hole for sucking oil) of the oil pump is higher, and the condition of empty suction is easy to occur. After the oil baffle 11 is added, an oil suction port of the oil pump is changed into a gap formed between the oil baffle 11 and the bottom of the reducer shell 1 from a round hole, so that the oil suction height of the oil pump is reduced, and the occurrence of empty suction is effectively prevented.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are for understanding and reading only by those skilled in the art, and are not intended to limit the scope of the utility model, so that any structural modifications, proportional changes, or size adjustments should fall within the scope of the utility model without affecting the efficacy and achievement of the present utility model. Also, the terms such as "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for which the utility model may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.

Claims

1. A lubricating oil conveying structure for a speed reducer comprises a speed reducer shell (1), an oil pump (18), an oil duct and an oil injection ring (3); the oil duct is arranged on the speed reducer shell (1), the oil pump (18) is arranged at the lubricating oil inlet (17), one end of the oil duct is connected with an outlet of the oil pump (18), and the other end of the oil duct is communicated with the oil injection ring (3), and the oil duct is characterized by further comprising an annular cooling plate arranged between the speed reducer shell (1) and the stator (2), and a plurality of cooling oil grooves (4) are formed in the inner wall of the annular cooling plate; the cooling oil groove (4) is communicated with the oil duct, and lubricating oil in the oil duct flows through the outer surface of the stator (2) through the cooling oil groove (4) to reach a closed cavity formed between the oil spraying ring (3) and the reducer casing (1).

2. A lubrication oil delivery structure for a decelerator according to claim 1, wherein a plurality of cooling oil grooves (4) are arranged at uniform intervals.

3. A lubrication oil delivery structure for a speed reducer according to claim 1, wherein the annular cooling plate is provided with an annular pipe (16) for communicating a plurality of cooling oil grooves (4), and the annular pipe (16) is connected to the oil passage for introducing lubrication oil in the oil passage into each of the cooling oil grooves (4).

4. The lubricating oil conveying structure for a speed reducer according to claim 1, wherein the two axial ends of the annular cooling plate are folded inwards along the radial direction to form an annular baffle, and the inner wall of the annular baffle is in contact with the outer wall of the oil spraying ring (3).

5. A lubrication oil delivery structure for a decelerator according to claim 1, wherein the oil passage is formed by connecting a plurality of pipes provided on the housing (1) of the decelerator.

6. The lubricating oil transporting structure for a decelerator according to claim 5, wherein the oil passage for cooling the stator (2) includes a pipe a (12), a pipe B (13), a pipe C (14), a pipe D (15), a pipe E (20), a pipe F (22), a oil separating chamber (9), a pipe G (8), a pipe H (7), a pipe I (6), and a pipe J (5) which are connected in this order; wherein, pipeline A (12) is connected with oil pump (18) export, and pipeline J (5) are connected with cooling oil groove (4).

7. The lubricating oil transporting structure for a decelerator according to claim 6, wherein a heat exchanger (21) is provided between the pipe E (20) and the pipe F (22).

8. The lubricating oil transporting structure for a decelerator according to claim 6, wherein both ends of the oil separating chamber (9) are connected to a pipe G (8) and a pipe K (10), respectively, the lubricating oil flowing into the pipe G (8) is used for cooling the stator (2), and the lubricating oil flowing into the pipe K (10) is used for cooling the rotor.

9. The lubricating oil transporting structure for a decelerator according to claim 5, wherein an oil-impermeable groove (19) is provided on a housing joint surface formed at a joint of two adjacent pipes, the oil-impermeable groove (19) being provided outside a pipe port and communicating with an inside of a decelerator casing (1) for introducing lubricating oil oozing out from the pipe port into the inside of the decelerator casing (1).

10. The lubricating oil conveying structure for a speed reducer according to claim 1, wherein an oil baffle plate (11) is arranged on the speed reducer shell (1) at an oil suction inlet of an oil pump, and a gap is formed between the oil baffle plate (11) and the speed reducer shell (1).