CN215110369U - Differential case and differential - Google Patents

Abstract

The utility model relates to an automotive differential technical field provides a differential mechanism casing and differential mechanism. Differential housing in be provided with cylinder planetary gear axle, cylinder planetary gear axle's first end terminal surface is provided with axially extended oil duct, be provided with on the differential housing and be on a parallel with the oil inlet that the central axis of oil duct extends, the oil inlet with the oil duct partially staggers and feeds through. The oil inlet through setting up on differential mechanism housing carries out the collection of lubricating oil, has avoided the oil leak problem that installation gap leads to between oil baffle and the differential mechanism housing.

Description

Differential case and differential

Technical Field

The utility model relates to an automotive differential technical field, in particular to differential mechanism casing and differential mechanism.

Background

There are problems in the use of prior differential assemblies, on one hand, the oil baffle is typically used to collect gear oil to provide lubrication for the needle bearings of the planetary cylindrical gear set, but since the prior oil baffle is a stamped component, two problems arise: firstly, the oil baffle plate is arranged on the differential case through a buckle, so that the oil baffle plate and the differential case are not firmly fixed, a large gap exists, and the problem of oil leakage still exists although sealing is performed through a sealing ring; secondly, because the oil baffle plate of punching press production keeps off the oil area less, keeps off the oil and relatively disperses, and lubricating oil is difficult to the retention, and above-mentioned two problems lead to planetary cylindrical gear set's bearing to lack the lubrication, and then takes place wearing and tearing. On the other hand, the differential shell structure that uses at present is complicated, therefore the casing processing degree of difficulty is high, and the cost is higher, and the difficult adjustment of gear among the assembly assembling process.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a differential mechanism casing and differential mechanism to solve the oil leak that the oil baffle that uses at present leads to, the poor problem of effect is collected to lubricating oil.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a differential mechanism shell is provided with a cylindrical planet gear shaft, a first end face of the cylindrical planet gear shaft is provided with an axially extending oil channel, an oil inlet parallel to the central axis of the oil channel extends is formed in the differential mechanism shell, and the oil inlet is partially staggered and communicated with the oil channel. Further, the differential case includes a first case and a second case which are arranged in the direction of the central axis and mechanically connected, the cylindrical planetary gear shafts are disposed in the second case, the cylindrical planetary gear shafts penetrate the second case, the first end face is joined to the first case end face, and the oil inlet is disposed in the first case.

Further, the first housing includes a flange engaged with the second housing, and the oil inlet extends through the flange.

Further, an oil storage groove communicated with the oil inlet is formed in the end face, jointed to the second shell, of the flange.

Furthermore, an oil guide groove is formed in the bottom surface of the oil storage groove and communicated with the oil inlet along the radial direction; a side gear, a planetary gear shaft and a planetary gear are arranged in the first shell.

Further, the first shell is provided with a plurality of cylindrical planet gear shafts and corresponding oil inlets at intervals in the circumferential direction.

Further, the first shell is provided with a protruding installation part, and the end face of the second shell, which is jointed with the first shell, is provided with an installation groove matched with the installation part.

Further, the second housing is also provided with a cylindrical planetary gear set mounted on a cylindrical planetary gear shaft through a bearing, and the cylindrical planetary gear shaft is provided with a radial oil passage communicated with the axial oil passage to supply lubricating oil to the bearing.

Further, an oil guide ring is sleeved on the cylindrical planet gear shaft, an annular groove communicated with the radial oil duct is formed in the inner circumferential surface of the oil guide ring, and a radial through hole communicated with the annular groove is formed in the oil guide ring.

Compared with the prior art, differential mechanism casing have following advantage: the oil inlet through setting up on differential mechanism housing carries out the collection of lubricating oil, has avoided the oil leak problem that installation gap leads to between oil baffle and the differential mechanism housing.

Another object of the present invention is to provide a differential gear, which is provided with the differential gear housing.

The differential has the same advantages as the differential case described above with respect to the prior art, and will not be described herein.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural view of one embodiment of a differential housing according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of the first housing according to the present invention;

fig. 3 is an assembly view of one embodiment of a differential of the present invention.

Description of reference numerals:

10-a first shell, 11-an oil inlet, 12-a flange, 13-an oil storage tank, 14-an oil guide tank, 15-a mounting part, 20-a second shell, 30-a cylindrical planetary gear shaft, 31-an oil channel, 40-a side gear, 50-a planetary gear shaft, 60-a planetary gear, 70-a cylindrical planetary gear set, 80-a bearing and 90-an oil guide ring.

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

In the present invention, unless otherwise specified, the terms of orientation such as "upper", "lower", "left", "right", "top" and "bottom" used herein generally refer to the orientation shown in the drawings. It should be noted that this is only for the convenience of describing the present invention, and should not be construed as a limitation of the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

In the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

The utility model discloses a first aspect provides a differential mechanism casing, be provided with cylinder planetary gear axle 30 in the differential mechanism casing, the first end terminal surface of cylinder planetary gear axle 30 is provided with axially extended oil duct 31, be provided with on the differential mechanism casing and be on a parallel with the oil inlet 11 that the central axis of oil duct 31 extends, oil inlet 11 with oil duct 31 staggers partially and communicates.

The differential case of the present invention, the oil inlet 11 and the oil passage 31 are partially staggered and communicated, that is, the central axis of the oil inlet 11 is parallel to the central axis of the oil passage 31, the oil inlet 11 is partially aligned with the oil passage 31 (for example, the sum of the radii of the oil inlet 11 and the oil passage 31 is greater than the distance between the central axes of the two), which makes the lubricating oil move along the direction perpendicular to the central axis of the oil passage 31 when moving between the oil inlet 11 and the oil passage 31, the lubricating oil can be collected through the oil inlet 11, and the collected lubricating oil is fed into the oil passage 31, the partially staggered design makes the lubricating oil flowing into the oil passage difficult to flow out through the oil inlet 11 reversely, and by integrally arranging the oil inlet 11 on the differential case, the oil leakage problem caused by the installation gap between the oil baffle plate and the differential case which are made by stamping in the past is avoided, the problems that the oil baffle plate has small oil baffle area, the oil baffle is dispersed, and the lubricating oil is difficult to be reserved are also solved.

Need to explain, differential mechanism casing be applied to in a car coaxial planet electric drive axle, car coaxial planet electric drive axle has the shell, differential mechanism casing set up in the shell, for guaranteeing the normal operating of spare part such as differential mechanism, have a large amount of lubricating oil that can be mixxed by the gear of installation or gear train in the differential mechanism casing in the shell, consequently the utility model provides an oil inlet 11 that differential mechanism casing set up only need passively stir the lubricating oil of coming and collect can reach to the effect of 31 fuel supplies of oil duct need not the assistance of other spare parts.

In order to solve the problem that the differential case is difficult to machine and adjust parts during assembly due to the complex structure of the differential case, referring to fig. 1, the differential case comprises a first case 10 and a second case 20 which are arranged along the central axis direction and are mechanically connected, the cylindrical planet gear shafts 30 are arranged in the second case 20, the cylindrical planet gear shafts 30 penetrate through the second case 20, the first end face is jointed with the first case 10 end face, and the oil inlet 11 is arranged in the first case 10. In particular, the mechanical connection may be by means of a bolt. The cylindrical planetary gear shaft 30 is arranged in the second housing 20 and the oil inlet 11 is arranged in the first housing 10, so that the oil inlet 11 and the connected mounting position for mounting the cylindrical planetary gear shaft 30 can be respectively processed, an original complex structure is changed into a combination of two relatively simple structures, the processing process is greatly simplified, and the processing precision is improved.

In order to facilitate the engagement between the first housing 10 and the second housing 20, referring to fig. 1 and 2, the first housing 10 includes a flange 12 engaged with the second housing 20, and the oil inlet 11 penetrates the flange 12. Specifically, can be in set up a plurality of through-holes that supply the bolt to pass on the flange 12 of first casing 10, and be provided with the internal thread hole that is used for the construction bolt correspondingly on the second casing 20, and then will through the bolt first casing 10 with second casing 20 connects into an organic whole, and the bolt can be provided with a plurality of reliability in order to guarantee to connect as required, as the example, the utility model discloses in set up 9 bolts.

In order to further solve the problem of bearing wear caused by insufficient lubrication due to insufficient oil retaining capability of the oil retaining ring in the prior art, referring to fig. 2 and 3, an oil storage groove 13 communicated with the oil inlet 11 is formed in the end surface of the flange 12 joined to the second housing 20. The oil storage tank 13 is arranged on the end surface of the flange 12 joined to the second housing 20, that is, between the oil inlet 11 and the oil passage 31, so that the oil storage tank becomes a cavity between the oil inlet 11 and the oil passage 31, on one hand, the oil storage tank 13 and the oil inlet 11 form a small-opening and large-opening structure, which is convenient for receiving the lubricating oil flowing in through the oil inlet 11, and the flowing lubricating oil is difficult to flow out through the oil inlet 11 in a reverse flow manner, on the other hand, the oil storage tank 13 can store a certain amount of lubricating oil, so that the sufficient lubricating oil is ensured to flow into the oil passage 31.

Further, referring to fig. 2, an oil guide groove 14 is formed in a bottom surface of the oil storage groove 13, and the oil guide groove 14 is communicated with the oil inlet 11 in a radial direction; the first case has side gears 40, planetary gear shafts 50, and planetary gears 60 disposed therein. The oil guide grooves 14 are arranged to connect the oil inlet 11 and the oil storage groove 13, and on the other hand, two oil guide grooves 14 can be arranged on two sides of the oil inlet 11 respectively, because the oil inlet 11 passively receives the thrown lubricating oil, and the gears and gear sets arranged in the differential case have two conditions of positive rotation and negative rotation, so that the thrown lubricating oil is thrown into the oil inlet 11 from one of the left side and the right side of the oil inlet 11 along a certain angle due to the difference of the rotation directions of the gears, and therefore the oil guide grooves 14 are communicated with the oil inlet 11 along the radial direction, the length of the oil inlet 11 is lengthened to a certain extent, and more lubricating oil can be received.

A plurality of cylindrical planetary gear sets are generally circumferentially arranged in the differential case, and as shown in fig. 1, in order to meet the lubrication requirement, a plurality of cylindrical planetary gear shafts 30 and corresponding oil inlets 11 are circumferentially arranged in the differential case.

In the present invention, the differential case in the prior art is designed as a combined component part composed of the first case 10 and the second case 20, so that the first case 10 and the second case 20 are conveniently and stably installed, as shown in fig. 2, the first case 10 has a protruding installation portion 15, and the second case 20 is joined to the end surface of the first case 10 and has an installation groove matched with the installation portion 15. Specifically, the mounting portion 15 may have a different shape, such as a cylinder or a rectangular parallelepiped, and when the mounting portion 15 is mounted in cooperation with the mounting groove, the first housing 10 may be restricted from moving in a radial direction with respect to the second housing 20, so as to facilitate the mounting in cooperation.

According to a preferred embodiment of the present invention, as shown in fig. 3, the second housing 20 may be further provided with a cylindrical planetary gear set 70 mounted on the cylindrical planetary gear shaft 30 through a bearing 80, and the cylindrical planetary gear shaft 30 is provided with a radial oil passage communicating with the axial oil passage 31 to supply the lubricating oil to the bearing. The lubricating oil in the oil passage 31 flows out of the oil passage 31 through the radial oil passage provided in communication with the axial oil passage 31, thereby supplying the lubricating oil to the bearing 80 of the cylindrical planetary gear set 70 mounted on the cylindrical planetary gear shaft 30.

In order to better supply the bearing 80 of the cylindrical gear set 70 with lubricating oil, referring to fig. 3, an oil guiding ring 90 is sleeved on the cylindrical planet gear shaft 30, an annular groove communicated with the radial oil passage is formed on the inner circumferential surface of the oil guiding ring 90, and a radial through hole communicated with the annular groove is formed in the oil guiding ring 90. A small amount of lubricating oil can be reserved in the annular groove, and when the bearing 80 starts to move, the lubricating oil in the annular groove flows out in time, so that the lubricating effect is ensured.

Another object of the present invention is to provide a differential gear, which is provided with the differential gear housing. Adopt the utility model provides a differential mechanism casing can provide better lubricated effect for setting up gear and the gear train in differential mechanism casing, and because differential mechanism casing has adopted the components of a whole that can function independently design, consequently spare part can conveniently install in the differential mechanism casing, and easily adjust the position of spare part in the installation.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. 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 differential case is characterized in that a cylindrical planet gear shaft (30) is arranged in the differential case, an axially extending oil passage (31) is arranged at the first end face of the cylindrical planet gear shaft (30), an oil inlet (11) extending parallel to the central axis of the oil passage (31) is arranged on the differential case, and the oil inlet (11) is partially staggered and communicated with the oil passage (31).

2. A differential case according to claim 1, characterized in that the differential case comprises a first case (10) and a second case (20) which are aligned in the direction of the central axis and are mechanically connected, the cylindrical pinion shafts (30) are provided in the second case (20), the cylindrical pinion shafts (30) pass through the second case (20), the first end face is joined to the first case (10) end face, and the oil inlet (11) is provided in the first case (10).

3. A differential case as claimed in claim 2, characterized in that said first case (10) includes a flange (12) engaged with said second case (20), said oil inlet (11) passing through said flange (12).

4. A differential case as defined in claim 3, wherein an oil reservoir (13) communicating with said oil inlet (11) is provided on an end surface of said flange (12) joined to the second case (20).

5. The differential case according to claim 4, wherein a bottom surface of the oil reservoir (13) is provided with an oil guide groove (14), the oil guide groove (14) communicating with the oil inlet (11) in a radial direction;

a side gear (40), a planetary gear shaft (50) and a planetary gear (60) are provided in the first housing.

6. A differential case as claimed in claim 1, wherein said differential case is circumferentially spaced provided with a plurality of cylindrical planet gear shafts (30) and corresponding oil inlets (11).

7. A differential case as claimed in claim 2, wherein said first case (10) has a projecting mounting portion (15), and an end face of said second case (20) joined to said first case (10) has a mounting groove fitted to said mounting portion (15).

8. A differential case as defined in claim 2, wherein said second case (20) is further provided with a cylindrical planetary gear set (70) mounted on a cylindrical planetary gear shaft (30) through a bearing (80), the cylindrical planetary gear shaft (30) being provided with a radial oil passage communicating with an axial oil passage (31) to supply lubricating oil to said bearing.

9. The differential case according to claim 8, wherein an oil guide ring (90) is fitted over the cylindrical pinion shaft (30), an annular groove communicating with the radial oil passage is formed on an inner peripheral surface of the oil guide ring (90), and a radial through hole communicating with the annular groove is provided in the oil guide ring (90).

10. A differential, characterized in that it is provided with a differential case according to any one of claims 1-9.

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