CN220015977U - Differential mechanism, gearbox assembly and vehicle - Google Patents

Abstract

The present disclosure relates to a differential, a transmission assembly, and a vehicle, the differential comprising: the shell is provided with an inner cavity and a mounting channel communicated with the inner cavity, and the mounting channel is used for the half shaft to penetrate through; the support shaft is arranged in the inner cavity; the planetary gear is rotatably sleeved on the supporting shaft around the axis of the planetary gear, and a first gap is formed between the planetary gear and the inner wall of the inner cavity; and the half shaft gear is positioned in the inner cavity and is used for fixedly sleeving the half shaft, the half shaft gear is in meshed connection with the planetary gear, a second gap communicated with the first gap is formed between the half shaft gear and the inner wall of the inner cavity, and a runner which is communicated with the mounting channel and the second gap is arranged on the half shaft gear. Therefore, the flow passage which is convenient for the lubricating oil to flow to the inner cavity of the differential mechanism is additionally arranged on the differential mechanism, so that the mobility of the lubricating oil can be enhanced, and the lubricating effect on all parts in the differential mechanism can be enhanced.

Description

Differential mechanism, gearbox assembly and vehicle

Technical Field

The present disclosure relates to the field of vehicle technology, and in particular, to a differential, a transmission assembly, and a vehicle.

Background

The electric drive axle differential mechanism assembly generally comprises a large gear ring, a differential mechanism shell, a planetary gear, a half shaft, a straight shaft, bolts, a half shaft gear gasket, a planetary gear gasket and an elastic pin, the oil quantity of an electric drive reduction gearbox is generally small at present, the half position of the half shaft gear cannot be reached, and a new energy electric vehicle has an urgent and urgent working condition, so that the internal lubrication of the differential mechanism is definitely at great risk.

In the related art, the gap between the side gear and the casing of the differential is smaller, and when the lubricating oil in the gearbox circulates through the gap between the side gear and the casing, the mobility is poor, so that various abrasion and sintering problems of poor lubrication of the differential occur easily in the running process, such as abrasion of a side gear gasket, abrasion of a planetary gear gasket, abrasion of a supporting shaft or sintering, and the like, are common problems, and the reliability and the service life of the differential are affected to a certain extent.

Disclosure of Invention

It is an object of the present disclosure to provide a differential, a transmission assembly, and a vehicle, in which a flow passage for facilitating a flow of lubricating oil to an inner cavity of the differential is added, so that fluidity of the lubricating oil can be enhanced, and lubrication effects on various components in the differential can be enhanced, so as to at least partially solve the above-mentioned technical problems.

To achieve the above object, a first aspect of the present disclosure provides a differential comprising:

the shell is provided with an inner cavity and a mounting channel communicated with the inner cavity, and the mounting channel is used for the half shaft to penetrate through;

the support shaft is arranged in the inner cavity;

the planetary gear is sleeved on the supporting shaft in a rotating way around the axis of the planetary gear, and a first gap is formed between the planetary gear and the inner wall of the inner cavity; and

the side gear is positioned in the inner cavity and is used for being fixedly sleeved on the half shaft, the side gear is in meshed connection with the planet gear, a second gap communicated with the first gap is formed between the side gear and the inner wall of the inner cavity, and a runner communicated with the mounting channel and the second gap is arranged on the side gear.

Optionally, the side gear includes a shaft portion and a tooth portion coaxially connected, the tooth portion includes a tooth face connected to the planetary gear and an outer wall surface connected between an outer shaft wall of the shaft portion and the tooth face, the second gap includes a first section located between the outer shaft wall and the inner cavity and a second section located between the outer wall surface and the inner cavity, the flow passage is configured as a passage penetrating the side gear, a communication of the flow passage and the second gap is located at an end of the first section communicating with the second section, and/or a communication of the flow passage and the second gap is located on the second section.

Optionally, the outer wall surface of the tooth part comprises a first wall surface and a second wall surface which are sequentially connected from the outer shaft wall towards the tooth surface, a first gasket sleeved on the shaft part is arranged between the first wall surface and the inner cavity, the communication part of the runner and the second gap is positioned on the outer shaft wall, and/or the communication part of the runner and the second gap is positioned on the second wall surface.

Optionally, the flow passage has an inlet on an end face of the shaft portion facing away from the tooth portion and an outlet on the outer shaft wall.

Optionally, the flow channel comprises a first flow channel section and a second flow channel section which are communicated in sequence from the inlet towards the outlet.

Optionally, the extending direction of the first flow channel section is perpendicular to the extending direction of the second flow channel section.

Optionally, the side gear includes a shaft portion and a tooth portion coaxially connected, the tooth portion includes a tooth face connected to the planetary gear and an outer wall surface connected between an outer shaft wall of the shaft portion and the tooth face, the second gap includes a first section between the outer shaft wall and the inner cavity and a second section between the outer wall surface and the inner cavity, the flow passage is configured as a flow passage groove, an inlet end of the flow passage groove is located at an end of the shaft portion away from the tooth portion, and an outlet end of the flow passage groove is located at an end of the outer shaft wall close to the outer wall surface or on the outer wall surface.

Optionally, the number of the flow passages is plural and arranged at intervals along the circumferential direction of the side gear.

A second aspect of the present disclosure also provides a transmission assembly comprising a differential as described above.

A third aspect of the present disclosure also provides a vehicle comprising a gearbox assembly as described above.

Through the technical scheme, through addding the runner on the side gear, can make the lubricating oil in the gearbox flow to the second clearance through the runner to flow to in the first clearance after the second clearance, along with planetary gear and side gear operation, finally make lubricating oil can flow into the inner chamber of the casing of differential mechanism. In the flowing process of lubricating oil, because of the runner that adds, can strengthen the mobility of lubricating oil, from this when lubricating oil flows through the second clearance, can strengthen the lubrication effect between side gear and the casing, when passing through first clearance, can strengthen the lubrication effect between planetary gear and the casing, in addition, the lubrication effect between side gear and the planetary gear and between planetary gear and the back shaft can also be strengthened to the lubrication effect between reduction differential mechanism casing each part wear or the risk of sintering.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic cross-sectional structural view of a differential provided in an exemplary embodiment of the present disclosure;

FIG. 2 is an enlarged schematic view of a portion of the position A of FIG. 1;

FIG. 3 is a schematic structural view of a side gear provided in an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a differential provided in an exemplary embodiment of the present disclosure;

fig. 5 is a schematic structural view of a housing interior provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-a housing; 101-lumen; 102-mounting channels; 2-a support shaft; 3-planetary gears; 4-side gears; 401-shaft portion; 4011-an outer shaft wall; 4021-tooth flanks; 4022-an outer wall surface; 40221-first wall; 40222-second wall; 402-teeth; 403-flow channel; 4031-a first flow path segment; 4032-a second flow path segment; 4033-inlet; 4034-outlet; 5-a first gap; 6-a second gap; 601-first segment; 602-a second section; 7-a first gasket; 8-a second gasket.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, "inner and outer" refers to the own contours of the respective parts, unless stated to the contrary. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are used for distinguishing one element from another and not necessarily for describing a sequential or chronological order. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated.

In the related art, a differential is used as a component of an automobile transmission system, and the differential has the following main functions: 1. for distributing torque between the two output half shafts; 2. the two output half shafts can be guaranteed to rotate at different angular speeds; 3. used for ensuring the power transmission of each driving wheel under various motion conditions, etc. The application of the differential mechanism improves the stability of the vehicle in the turning running process, and improves the driving safety of personnel at the same time, but when the differential mechanism actually runs, because the gap between the side gear and the shell of the differential mechanism is smaller (approximately about 0.1 mm), when the lubricating oil in the gearbox circulates through the gap between the side gear and the shell, the mobility is poor, the condition that the lubricating oil is difficult to enter the inner cavity of the shell through the gap exists, when the oil quantity of the lubricating oil entering the inner cavity is insufficient, a small quantity of the lubricating oil cannot fully lubricate the meshed planetary gear and the side gear, the conditions such as abrasion of the side gear gasket, abrasion of the planetary gear gasket, abrasion or sintering of the supporting shaft are very easy to occur, meanwhile, the novel energy automobile in the related technology has the conditions of urgent and small oil quantity in the gearbox of the type of the automobile, the differential mechanism on the novel energy automobile has the problem that the lubricating oil cannot fully flow into the inner cavity of the shell, and the oil quantity of the lubricating oil flowing in the inner cavity is insufficient, so that the reliability and the service life of the differential mechanism can be influenced to a certain extent.

Based on this, referring to fig. 1 to 5, a first aspect of the present disclosure provides a differential comprising a housing 1, a support shaft 2, a planetary gear 3 and a side gear 4, the housing 1 having an inner cavity 101 and a mounting passage 102 communicating with the inner cavity 101, wherein the mounting passage 102 is used for a half shaft to pass through, one end of the half shaft of an automobile extends into the inner cavity 101 through the mounting passage 102 and is connected with the side gear 4, the side gear 4 is located in the inner cavity 101 and fixedly sleeved on the half shaft, the support shaft 2 is connected in the inner cavity 101 by a fixing pin, the planetary gear 3 is rotatably sleeved on the support shaft 2 around its own axis, and the side gear 4 is in meshed connection with the planetary gear 3.

In the present disclosure, referring to fig. 1 and 2, there is a first gap 5 between the planetary gear 3 and the inner wall of the inner cavity 101 through which lubricating oil flows, there is a second gap 6 between the side gear 4 and the inner wall of the inner cavity 101, which communicates with the first gap 5, and when the differential is in an operating state, lubricating oil in the transmission enters from the gap between the axle shaft and the mounting passage 102 and flows toward the second gap 6, but the gap between the end of the side gear 4, which is far from the planetary gear 3, and the inner wall of the inner cavity 101 is small, so that fluidity is poor when lubricating oil flows through this gap, so that lubricating oil is not likely to enter the inner cavity 101 through this gap, which may cause an insufficient amount of lubricating oil flowing into the inner cavity 101, and thus, effective lubrication cannot be provided for each part mounted in the inner cavity 101, and therefore a flow passage 403 may be opened on the side gear 4, that is able to communicate the mounting passage 102 with the second gap 6.

Through the above technical scheme, through adding the runner 403 on the side gear 4, the lubricating oil in the gearbox can flow to the second gap 6 through the runner 403 and flow to the first gap 5 after passing through the second gap 6, and as the planetary gear 3 and the side gear 4 run, the lubricating oil can finally flow into the inner cavity 101 of the housing 1 of the differential mechanism. In the flowing process of the lubricating oil, the fluidity of the lubricating oil can be enhanced due to the additionally arranged flow passage, so that when the lubricating oil flows through the second gap 6, the lubricating effect between the side gear 4 and the housing 1 can be enhanced, and when the lubricating oil passes through the first gap 5, the lubricating effect between the planet gears 3 and 1 can be enhanced, and in addition, the lubricating effect between the side gear 4 and 3 and between the planet gears 3 and the supporting shaft 2 can be enhanced by lubricating oil replacement, so that the abrasion or sintering risk of each part in the differential housing 1 is reduced.

The support shaft 2 may be a straight shaft or a cross shaft according to a specific vehicle model, which is not particularly limited in the present disclosure.

In some embodiments, referring to fig. 1-3, the side gear 4 includes a shaft portion 401 and a tooth portion 402 coaxially connected, wherein the tooth portion 402 includes a tooth surface 4021 connected to the planetary gear 3 and an outer wall surface 4022 connected between the outer shaft wall 4011 and the tooth surface 4021 of the shaft portion 401, the second gap 6 includes a first segment 601 located between the outer shaft wall 4011 and the inner cavity 101 and a second segment 602 located between the outer wall surface 4022 and the inner cavity 101, one of the channels 403 may be a passage penetrating the side gear 4, and a communication between the channel 403 and the second gap 6 may be located at an end of the first segment 601 communicating with the second segment 602, i.e., when the vehicle is traveling, lubricant may flow into the channel 403 through a gap between an inner wall of the mounting channel 102 and an outer wall of the vehicle, the lubricant flowing into the channel 403 may flow from the channel 403 toward the inner cavity 101, and the lubricant flowing out of the channel 403 may finally flow into the inner cavity 101 through the second segment 602 and the first gap 5; or the connection between the flow channel 403 and the second gap 6 may be located on the second section 602, that is, when the automobile is running, the lubricating oil will flow into the flow channel 403 through the gap between the inner wall of the mounting channel 102 and the outer wall of the half shaft of the automobile, the lubricating oil flowing into the flow channel 403 flows from the flow channel 403 toward the inner cavity 101, and flows out of the flow channel 403 from the second section 602, and finally flows into the inner cavity 101 through the first gap 5 or the meshing gap between the side gear 4 and the planetary gear 3. Thus, the communication of the flow passage 403 with the second gap 6 is at the end of the first section 601 that communicates with the second section 602, or on the second section 602, and may bypass the narrow space where the first section 601 is located to enhance the mobility of the lubricating oil to facilitate lubrication of the various components within the differential.

In some embodiments, referring to fig. 1 to 3, the outer wall surface 4022 of the tooth portion 402 includes a first wall surface 40221 and a second wall surface 40222 that are sequentially connected from the outer shaft wall 4011 toward the tooth surface 4021, and a first gasket 7 that is sleeved on the shaft portion 401 is disposed between the first wall surface 40221 and the inner cavity 101, that is, when the lubricating oil flows into the flow channel 403 from the gap between the inner wall of the mounting channel 102 and the outer wall of the half shaft of the vehicle, the lubricating oil in the flow channel 403 flows from the flow channel 403 toward the inner cavity 101, the lubricating oil flowing out of the flow channel 403 will contact the first gasket 7, and the lubricating oil flows to the first gap 5 or to the meshing portion between the side gear 4 and the planetary gear 3 through the gap between the first gasket 7 and the inner wall of the inner cavity 101, and finally flows into the inner cavity 101. In this way, the risk of wear of the side gear shims can be reduced.

In the present disclosure, the first spacer 7 is a spacer of the side gear 4, wherein the first spacer 7 functions to adjust a meshing gap between gears to ensure normal operation of the differential, and if the meshing gap between the side gear 4 and the planetary gears 3 is too large or too small, transmission efficiency is adversely affected, and even damage to equipment may be caused. The first shims 7 thus ensure that the meshing gap between the side gears 4 and the planetary gears 3 is satisfactory, avoiding as far as possible the service life of the differential being affected by the fact that the side gears 4 and the planetary gears 3 are damaged during operation due to improper assembly gaps.

In the present disclosure, a second spacer 8 is further sleeved on the support shaft 2, the second spacer 8 is located between the planetary gear 3 and the inner wall of the inner cavity 101, and the second spacer 8 also serves to adjust the meshing gap between the side gear 4 and the planetary gear 3.

In the present disclosure, the communication between the flow channel 403 and the second gap 6 may also be located on the second wall 40222, and when the lubricant flows out from the flow channel 403, the lubricant after flowing out is located between the first gasket 7 and the second gasket 8, and the lubricant may flow to the inner cavity 101 through the first gap 5 or to the inner cavity 101 through the meshing gap between the side gear 4 and the planetary gear 3.

In some embodiments, referring to fig. 3, the flow channel 403 has an inlet 4033 on the end face of the shaft portion 401 facing away from the tooth portion 402 and an outlet 4034 on the outer shaft wall 4011, as the lubricating oil flows from the gap between the inner wall of the mounting channel 102 and the outer wall of the vehicle axle half shaft, can flow into the flow channel 403 through the inlet 4033 and out of the flow channel 403 through the outlet 4034 after flowing within the flow channel 403 toward the interior cavity 101, and the lubricating oil exiting the flow channel 403 can flow into the interior cavity 101 after passing through the second gap 6 and the first gap 5.

In some embodiments, referring to fig. 2 and 3, the flow channel 403 includes a first flow channel section 4031 and a second flow channel section 4032 that are sequentially communicated from the inlet 4033 toward the outlet 4034, and the extending direction of the first flow channel section 4031 and the extending direction of the second flow channel section 4032 are perpendicular, and the lubricating oil entering the flow channel 403 from the inlet 4033 sequentially flows through the first flow channel section 4031 and the second flow channel section 4032 and then flows out of the flow channel 403 from the outlet 4034. Wherein the extending direction of the first flow path section 4031 is perpendicular to the extending direction of the second flow path section 4032, facilitating the processing of the flow path 403 on the side gear 4.

The flow channel 403 may be a channel penetrating the side gear 4, or the flow channel 403 may be a flow channel groove, for example, in some embodiments not shown, an inlet end of the flow channel groove is located at an end of the shaft 401 away from the tooth portion 402, an outlet end of the flow channel groove may be located at an end of the outer shaft wall 4011 near the outer wall surface 4022, and when the automobile is running, the lubricating oil enters the flow channel groove from the inlet end and flows in the flow channel groove toward the inner cavity 101, and the lubricating oil flowing out from the outlet end may flow to the inner cavity 101 after passing through the second gap 6 and the first gap 5 in sequence. Thus, by providing the flow passage grooves, the flow gap between the side gear 4 and the inner cavity 101 can be enlarged to enhance the fluidity of the lubricating oil.

In the present disclosure, the outlet end of the runner groove may also be located on the outer wall surface 4022, that is, it may be understood that the outlet end of the runner groove is located at the second section 602, and when the lubricant flows out from the outlet end of the second section 602, the lubricant contacts the first gasket 7, so as to enhance the lubrication effect on the location where the first gasket 7 is located.

In some embodiments, as shown with reference to FIG. 3, the number of flow passages 403 may be multiple and spaced circumferentially about the side gear 4. Providing multiple flow passages 403 on the side gear 4 has the advantage of facilitating better flow of lubricant into or out of the cavity 101, ensuring that sufficient lubricant is present in the cavity 101, reducing wear of various components within the differential, and improving the service life of the differential.

On the basis of the technical solution, a second aspect of the present disclosure also provides a gearbox assembly, which includes the differential of the first aspect or any embodiment of the first aspect. In addition, the gearbox assembly has all the beneficial effects of the differential mechanism, and the disclosure is not repeated herein.

On the basis of the technical scheme, the third aspect of the disclosure also provides a vehicle, which comprises the gearbox assembly of the second aspect. The vehicle may be, for example, a new energy vehicle or a fuel vehicle, etc., and has all the advantages of the above-described transmission assembly, and the disclosure is not repeated here.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. A differential, comprising:

the shell is provided with an inner cavity and a mounting channel communicated with the inner cavity, and the mounting channel is used for the half shaft to penetrate through;

the support shaft is arranged in the inner cavity;

the planetary gear is sleeved on the supporting shaft in a rotating way around the axis of the planetary gear, and a first gap is formed between the planetary gear and the inner wall of the inner cavity; and

the side gear is positioned in the inner cavity and is used for being fixedly sleeved on the half shaft, the side gear is in meshed connection with the planet gear, a second gap communicated with the first gap is formed between the side gear and the inner wall of the inner cavity, and a runner communicated with the mounting channel and the second gap is arranged on the side gear.

2. The differential of claim 1, wherein the side gear includes a shaft portion and a tooth portion coaxially connected, the tooth portion including a tooth face connected to the planetary gear and an outer wall surface connected between an outer shaft wall of the shaft portion and the tooth face, the second gap including a first section between the outer shaft wall and the inner cavity and a second section between the outer wall surface and the inner cavity, the flow passage being configured as a passage through the side gear, a communication of the flow passage with the second gap being located at an end of the first section in communication with the second section, and/or a communication of the flow passage with the second gap being located on the second section.

3. The differential according to claim 2, wherein the outer wall surface of the tooth portion includes a first wall surface and a second wall surface which are sequentially connected from the outer shaft wall toward the tooth surface, a first spacer which is sleeved on the shaft portion is provided between the first wall surface and the inner cavity, a communication portion of the flow passage and the second gap is located on the outer shaft wall, and/or a communication portion of the flow passage and the second gap is located on the second wall surface.

4. A differential as claimed in claim 3, wherein the flow passage has an inlet on an end face of the shaft portion facing away from the tooth portion and an outlet on the outer shaft wall.

5. The differential of claim 4, wherein the flow passage includes a first flow passage section and a second flow passage section in sequential communication from the inlet toward the outlet.

6. The differential of claim 5, wherein the direction of extension of the first flow path segment is perpendicular to the direction of extension of the second flow path segment.

7. The differential of claim 1, wherein the side gear includes a shaft portion and a tooth portion coaxially connected, the tooth portion including a tooth face connected to the planetary gear and an outer wall face connected between an outer shaft wall of the shaft portion and the tooth face, the flow passage being configured as a flow passage groove, an inlet end of the flow passage groove being located at an end of the shaft portion remote from the tooth portion, an outlet end of the flow passage groove being located at an end of the outer shaft wall near the outer wall face or on the outer wall face.

8. The differential of any one of claims 1-7, wherein the number of flow passages is a plurality and is arranged at intervals along the circumferential direction of the side gear.

9. A transmission assembly comprising the differential of any one of claims 1-8.

10. A vehicle comprising the transmission assembly of claim 9.