Transmission lubricating structure and vehicle

Abstract

The utility model discloses a transmission lubricating structure and a vehicle. The transmission lubricating structure comprises a shell and a planet carrier arranged in the shell. The planet shaft is arranged on the planet carrier, a first oil way is formed in the planet shaft, a first oil inlet hole communicated with the first oil way is formed in the axial end face of the planet shaft, a first oil supply hole communicated with the first oil way is formed in the peripheral face of the planet shaft, and lubricating oil entering the first oil way is discharged through the first oil supply hole; the planet wheel is arranged on the planet shaft in a sleeving mode through a first bearing, and first oil passing grooves penetrating in the radial direction are formed in the end faces of the two sides of the planet wheel in the axial direction. According to the transmission lubricating structure, the situation that when one side of a planet wheel is tightly attached, lubricating oil completely flows out of the other side of the planet wheel, and consequently the first bearing on the tightly attached side cannot be fully lubricated can be avoided; therefore, the first bearing can be fully lubricated in the process that the lubricating oil flows towards the two axial sides of the planet wheel so as to avoid early fatigue stripping of the first bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a transmission lubrication structure and a vehicle. Background Art

[0002] In recent years, due to the requirements of energy conservation and environmental protection, new energy vehicles have developed rapidly, and the requirements for the spatial layout and efficiency of transmissions are also getting higher and higher. In a transmission, bearings need to be provided to reduce the friction coefficient of components in the transmission during movement, and the bearings need lubricating oil for lubrication to reduce the frictional loss of bearing rotation. In related technologies, the bearings are not fully lubricated. Therefore, improvement is needed. Summary of the Utility Model

[0003] The utility model provides a transmission lubrication structure, which has the advantage of being able to fully lubricate a first bearing.

[0004] The transmission lubrication structure according to the first aspect embodiment of the utility model includes: a housing and a planet carrier disposed in the housing; a planet shaft disposed on the planet carrier and having a first oil passage formed therein, a first oil inlet hole communicating with the first oil passage is formed on the axial end surface of the planet shaft, and a first oil supply hole communicating with the first oil passage is formed on the outer peripheral surface of the planet shaft, and the lubricating oil entering the first oil passage is discharged to the outer peripheral surface of the planet shaft through the first oil supply hole; a planet gear sleeved on the planet shaft through a first bearing, and first oil passing grooves penetrating in the radial direction are provided on both end surfaces of the planet gear in the axial direction.

[0005] According to the transmission lubrication structure of the first aspect embodiment of the utility model, by providing first oil passing grooves on both end surfaces of the planet gear in the axial direction, it is possible to avoid the situation where when one side of the planet gear is tightly attached, all the lubricating oil flows out through the other side of the planet gear, resulting in insufficient lubrication of the first bearing on the tightly attached side. That is, it can ensure the normal flow of the oil passages on both axial sides of the planet gear, so that the first bearing can be fully lubricated during the flow of the lubricating oil towards both axial sides of the planet gear, avoiding early fatigue spalling of the first bearing and being beneficial to extending the service life of the first bearing.

[0006] According to some embodiments of the utility model, a plurality of the first oil passing grooves are formed on both end surfaces of the planet gear in the axial direction, and the plurality of the first oil passing grooves on the same side are evenly spaced along the circumferential direction of the planet shaft.

[0007] According to some embodiments of the present utility model, two first bearings are provided at intervals along the axial direction of the planetary shaft. The first oil supply hole is located between the two first bearings. A spacer sleeve is provided between the two first bearings. Second oil passing grooves penetrating the spacer sleeve in the radial direction are formed on both end faces of the spacer sleeve in the axial direction of the planetary shaft. At least a part of the second oil passing groove is disposed opposite to the first oil supply hole along the radial direction of the planetary shaft.

[0008] According to some embodiments of the present utility model, the second oil passing grooves on both end faces of the spacer sleeve in the axial direction are staggered along the circumferential direction of the planetary shaft.

[0009] According to some embodiments of the present utility model, a plurality of second oil passing grooves are formed on both end faces of the spacer sleeve in the axial direction of the planetary shaft. The plurality of second oil passing grooves on the same side of the spacer sleeve are evenly spaced along the circumferential direction of the spacer sleeve.

[0010] According to some embodiments of the present utility model, the transmission lubrication structure further includes: a motor shaft, which penetrates the housing and is provided with a first motor bearing between the motor shaft and the housing. A second oil passage is formed in the motor shaft. A second oil inlet hole communicating with the second oil passage is formed on the axial end face of the motor shaft. A second oil supply hole communicating with the second oil passage is formed on the outer peripheral surface of the motor shaft; a limit sleeve, which is sleeved on the motor shaft and is used to limit the position of the first motor bearing in the axial direction of the motor shaft. An oil passing hole opposite to the second oil supply hole along the radial direction of the motor shaft is formed on the limit sleeve; a first oil guiding member, which is disposed in the housing and is annular and sleeved on the outer peripheral side of the limit sleeve. A first oil guiding flow path, a first oil distributing hole and a second oil distributing hole communicating with the first oil guiding flow path are defined between the first oil guiding member and the limit sleeve. The oil passing hole is used to supply oil to the first oil guiding flow path. The first oil distributing hole is used to supply oil to the first oil supply hole. The second oil distributing hole is used to supply oil to the first motor bearing.

[0011] According to some embodiments of the present utility model, a second bearing is provided between the housing and the planet carrier. The second oil distributing hole is used to supply oil to the second bearing. A third oil passage extending in the radial direction of the motor shaft is defined between the planet carrier and the housing. The second bearing is axially disposed between the inlet of the third oil passage and the first oil supply hole along the motor shaft. The outlet of the third oil passage is used to supply oil to the first oil inlet hole.

[0012] According to some embodiments of the present utility model, the transmission lubrication structure further includes: a second oil guiding member disposed on the planetary shaft and having a second oil guiding flow path formed therein. A fourth oil path communicating the third oil path and the second oil guiding flow path is defined between the second oil guiding member and the planet carrier. At least a part of the second oil guiding member is inserted into the first oil path through the first oil inlet hole, and a third oil supply hole communicating with the second oil guiding flow path is formed on the part of the second oil guiding member inserted into the first oil path.

[0013] According to some embodiments of the present utility model, the transmission lubrication structure further includes: a motor shaft passing through the housing and having a second oil path formed therein, and a second oil inlet hole communicating with the second oil path is formed on an axial end surface of the motor shaft; an oil inlet nozzle passing through the second oil inlet hole and spaced apart from an inner peripheral surface of the second oil inlet hole to form an oil supply gap, and a fourth oil supply hole communicating with the oil supply gap is formed on an outer peripheral surface of the motor shaft corresponding to the oil supply gap; a second motor bearing sleeved on an end of the motor shaft located outside the housing, and the fourth oil supply hole is used for supplying oil to the second motor bearing.

[0014] A vehicle according to an embodiment of the second aspect of the present utility model includes: a transmission lubrication structure.

[0015] In the vehicle according to the embodiment of the second aspect of the present utility model, by providing first oil passing grooves on both end faces of the planet gear in the axial direction, it is possible to avoid the situation that when one side of the planet gear is tightly attached, all the lubricating oil flows out through the other side of the planet gear, resulting in insufficient lubrication of the first bearing on the tightly attached side. That is, it can ensure the normal flow of the oil paths on both axial sides of the planet gear, so that the first bearing can be fully lubricated during the flow of the lubricating oil toward both axial sides of the planet gear, thereby avoiding early fatigue spalling of the first bearing and being beneficial to extending the service life of the first bearing.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] Figure 1 is a partial cross-sectional view of a transmission lubrication structure according to an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a partial enlarged view of

[0019] Figure 3 is a schematic diagram of the oil flow direction of a transmission lubrication structure according to an embodiment of the present utility model, where the arrow indicates the flow direction of the lubricating oil;

[0020] Figure 4Schematic diagram of a spacer sleeve of a transmission lubrication structure according to an embodiment of the present utility model;

[0021] Figure 5 Side view of a planet gear of a transmission lubrication structure according to an embodiment of the present utility model on one side in the axial direction;

[0022] Figure 6 Side view of a planet gear of a transmission lubrication structure according to an embodiment of the present utility model on the other side in the axial direction;

[0023] Figure 7 Schematic diagram of a planet gear of a transmission lubrication structure according to an embodiment of the present utility model.

[0024] Reference numerals:

[0025] 100, transmission lubrication structure; 11, housing; 12, planet carrier; 121, internal gear ring; 13, second bearing; 14, third oil passage; 15, internal gear ring snap ring; 2, planet shaft; 21, first oil passage; 22, first oil inlet hole; 23, first oil supply hole; 3, planet gear; 31, first oil through groove; 41, first bearing; 42, spacer sleeve; 421, second oil through groove; 43, gasket; 5, motor shaft; 51, second oil passage; 52, second oil inlet hole; 53, second oil supply hole; 54, fourth oil supply hole; 55, oil retaining seal cover; 61, first motor bearing; 62, second motor bearing; 63, limit sleeve; 631, oil through hole; 64, bearing snap ring; 7, first oil guiding member; 71, first oil guiding flow path; 72, first oil distributing hole; 73, second oil distributing hole; 8, second oil guiding member; 81, second oil guiding flow path; 82, fourth oil passage; 83, third oil supply hole; 9, oil inlet nozzle; 91, oil supply gap. Detailed implementation manners

[0026] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0027] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can recognize the applicability of other processes and / or the use of other materials.

[0028] The transmission lubrication structure 100 according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0029] As Figures 1 - 7 shown, the transmission lubrication structure 100 according to an embodiment of the first aspect of the present utility model includes: a housing 11, a planet carrier 12, a planet shaft 2, and planet gears 3 disposed within the housing 11. The planet shaft 2 is disposed on the planet carrier 12 and is formed with a first oil passage 21. A first oil inlet hole 22 communicating with the first oil passage 21 is formed on the axial end surface of the planet shaft 2. A first oil supply hole 23 communicating with the first oil passage 21 is formed on the outer peripheral surface of the planet shaft 2. The lubricating oil entering the first oil passage 21 is discharged to the outer peripheral surface of the planet shaft 2 through the first oil supply hole 23. The planet gear 3 is sleeved on the planet shaft 2 through a first bearing 41. First oil passing grooves 31 penetrating in the radial direction are provided on both end surfaces of the planet gear 3 in the axial direction.

[0030] That is to say, the lubricating oil can enter the first oil passage 21 through the first oil inlet hole 22 and flow to the outer peripheral side of the planetary shaft 2 through the first oil supply hole 23 on the outer peripheral surface of the planetary shaft 2. Among them, the first bearing 41 is sleeved on the outer peripheral surface of the planetary shaft 2. Therefore, the lubricating oil flowing out through the first oil supply hole 23 can contact the first bearing 41 to lubricate the first bearing 41. In addition, gaskets 43 are usually arranged on both sides of the planetary gear 3. It can be understood that when the planetary gear 3 generates an axial displacement and causes the planetary gear 3 to be in contact with one side of the gasket 43, it is difficult for the lubricating oil flowing out of the first oil supply hole 23 to flow out from the side where the planetary gear 3 is in contact after passing through the first bearing 41. As a result, the oil resistance on the side where the planetary gear 3 is in contact is relatively large, and the oil resistance on the other side of the planetary gear 3 is relatively small. The lubricating oil will flow more to the side with smaller oil resistance, making the lubrication of the first bearing 41 on the side with larger oil resistance insufficient. Therefore, by forming first oil passing grooves 31 on both side surfaces of the planetary gear 3 in the axial direction, when the planetary gear 3 generates an axial displacement and causes the planetary gear 3 to be in contact with one side of the gasket 43, the lubricating oil flowing out of the first oil supply hole 23 can flow towards the outer peripheral side of the planetary gear 3 through the first oil passing groove 31 on the side where the planetary gear 3 is in contact with the gasket 43, thereby avoiding the oil resistance difference on both sides of the planetary gear 3, and further fully lubricating the first bearing 41 during the flow of the lubricating oil towards both axial sides of the planetary gear 3 to avoid early fatigue spalling of the first bearing 41, which is beneficial to extending the service life of the first bearing 41.

[0031] Moreover, the lubricating oil flowing towards the outer peripheral side of the planetary gear 3 through the first oil passing groove 31 can lubricate the tooth part of the planetary gear 3, thereby reducing the wear of the planetary gear 3, the sun gear, and the internal gear ring 121 and other structures, which is beneficial to extending the overall service life of the transmission.

[0032] According to the transmission lubrication structure 100 of the first aspect embodiment of the present invention, by providing the first oil passing grooves 31 on both end faces of the planetary gear 3 in the axial direction, it is possible to avoid the situation where all the lubricating oil flows out through the other side of the planetary gear 3 when one side of the planetary gear 3 is in contact, resulting in insufficient lubrication of the first bearing 41 on the contact side, that is, it can ensure the normal flow of the oil passage on both axial sides of the planetary gear 3, and further fully lubricate the first bearing 41 during the flow of the lubricating oil towards both axial sides of the planetary gear 3 to avoid early fatigue spalling of the first bearing 41, which is beneficial to extending the service life of the first bearing 41.

[0033] In some embodiments, the first bearing 41 is a needle roller bearing, and the planetary gear 3 is a double-tooth planetary gear 3. Among them, the needle roller bearing has a strong load-bearing capacity and can be used for the planetary gear 3 with high rotational speed. The planetary gear 3 with a double-tooth structure can provide a relatively high transmission efficiency with a relatively small volume and cost.

[0034] In some embodiments, the transmission lubrication structure 100 can be used in a new energy coaxial distributed electric drive system.

[0035] In some embodiments, a gasket 43 is provided between the planet gear 3 and the planet carrier 12. The gasket 43 is sleeved on the planet shaft 2. Therefore, the gasket 43 can reduce the movement friction between the planet gear 3 and the planet carrier 12, thereby avoiding the friction loss between the planet gear 3 and the planet carrier 12 and being beneficial to extending the service life of the planet gear 3 and the planet carrier 12.

[0036] In some embodiments, an internal gear ring 121 is provided on the housing 11. The internal gear ring 121 meshes with the planet gear 3. The internal gear ring 121 is clamped on the housing 11 by an internal gear ring snap spring 15, thereby playing a role in limiting the axial movement of the internal gear ring 121 and improving the stability of the internal gear ring 121.

[0037] According to some embodiments of the present invention, a plurality of first oil grooves 31 are formed on both end faces of the planet gear 3 in the axial direction. The plurality of first oil grooves 31 on the same side are evenly spaced along the circumferential direction of the planet shaft 2. Therefore, the lubricating oil flowing to one side of the planet gear 3 in the axial direction can flow toward the outer peripheral side of the planet gear 3 through the plurality of first oil grooves 31 at this place, thereby sharing the oil pressure in each first oil groove 31 to prevent the first oil grooves 31 from being blocked, and increasing the oil output of the first oil grooves 31 to the outer peripheral side of the planet gear 3, thereby accelerating the circulation efficiency of the lubricating oil to improve the lubrication effect on the first bearing 41. In addition, the plurality of first oil grooves 31 on the same side can evenly supply lubricating oil to multiple positions in the circumferential direction of the planet gear 3, thereby improving the uniformity of lubricating oil supply to the tooth part of the planet gear 3 to improve the lubrication effect on the tooth part of the planet gear 3.

[0038] According to some embodiments of the present invention, two first bearings 41 are arranged at intervals along the axial direction of the planet shaft 2. The first oil supply hole 23 is located between the two first bearings 41. A spacer sleeve 42 is provided between the two first bearings 41. Second oil grooves 421 penetrating the spacer sleeve 42 in the radial direction are formed on both end faces of the spacer sleeve 42 in the axial direction of the planet shaft 2. At least part of the second oil grooves 421 is disposed opposite to the first oil supply hole 23 along the radial direction of the planet shaft 2. That is to say, the two first bearings 41 are separated by the spacer sleeve 42 along the axial direction of the planet shaft 2, thereby avoiding the wear between the two first bearings 41, and thus extending the service life of the first bearings 41. At the same time, the lubricating oil flowing out through the first oil supply hole 23 can flow to the first bearings 41 through the second oil grooves 421, thereby ensuring the lubrication effect of the first bearings 41 on the basis of providing the spacer sleeve 42.

[0039] According to some embodiments of the present utility model, the second oil passing grooves 421 located on the end faces at both axial sides of the spacer sleeve 42 are arranged staggeredly in the circumferential direction of the spacer sleeve 42. That is to say, the second oil passing grooves 421 located on one axial side of the spacer sleeve 42 and the second oil passing grooves 421 located on the other axial side of the spacer sleeve 42 are arranged at intervals in the circumferential direction of the spacer sleeve 42. Therefore, it is possible to avoid the second oil passing grooves 421 on both sides being arranged at the same position in the circumferential direction of the spacer sleeve 42 around the planetary shaft 2, thereby avoiding the too low strength of the spacer sleeve 42 at the second oil passing grooves 421 and being beneficial to improving the reliability of the spacer sleeve 42.

[0040] According to some embodiments of the present utility model, a plurality of second oil passing grooves 421 are formed on the end faces at both axial sides of the spacer sleeve 42 in the axial direction of the planetary shaft 2, and the plurality of second oil passing grooves 421 located on the same side of the spacer sleeve 42 are arranged at uniform intervals in the circumferential direction of the spacer sleeve 42. Therefore, the lubricating oil flowing out through the first oil supply hole 23 can flow to the first bearing 41 through the plurality of second oil passing grooves 421, thereby increasing the amount of lubricating oil delivered from the spacer sleeve 42 to the first bearing 41 to improve the lubrication effect on the first bearing 41. In addition, the plurality of second oil passing grooves 421 located on the same side can uniformly deliver lubricating oil to multiple positions in the circumferential direction of the first bearing 41 on the same side, thereby improving the uniformity of the lubricating oil delivered from the spacer sleeve 42 to the first bearing 41 and enhancing the lubrication effect on the first bearing 41.

[0041] According to some embodiments of the present utility model, the transmission lubrication structure 100 further includes: a motor shaft 5, a limiting sleeve 63, and a first oil guiding member 7. The motor shaft 5 passes through the housing 11 and a first motor bearing 61 is provided between the motor shaft 5 and the housing 11. A second oil passage 51 is formed in the motor shaft 5, a second oil inlet hole 52 communicating with the second oil passage 51 is formed on the axial end face of the motor shaft 5, and a second oil supply hole 53 communicating with the second oil passage 51 is formed on the outer peripheral surface of the motor shaft 5. The limiting sleeve 63 is sleeved on the motor shaft 5 and is used to limit the position of the first motor bearing 61 in the axial direction of the motor shaft 5. An oil passing hole 631 is formed on the limiting sleeve 63 opposite to the second oil supply hole 53 in the radial direction of the motor shaft 5. The first oil guiding member 7 is arranged in the housing 11 and is in the shape of a ring sleeved on the outer peripheral side of the limiting sleeve 63. A first oil guiding flow path 71, a first oil distributing hole 72, and a second oil distributing hole 73 communicating with the first oil guiding flow path 71 are defined between the first oil guiding member 7 and the limiting sleeve 63. The oil passing hole 631 is used to supply oil to the first oil guiding flow path 71, the first oil distributing hole 72 is used to supply oil to the first oil inlet hole 22, and the second oil distributing hole 73 is used to supply oil to the first motor bearing 61.

[0042] Among them, by arranging a first motor bearing 61 between the motor shaft 5 and the housing 11, the friction between the motor shaft 5 and the housing 11 can be reduced, and the stability of the rotational movement of the motor shaft 5 can be improved. The inner ring of the first motor bearing 61 can be axially limited by the limit sleeve 63. Specifically, lubricating oil can enter the second oil passage 51 in the motor shaft 5 through the second oil inlet hole 52, and can flow to the outer peripheral side of the motor shaft 5 through the second oil supply hole 53. The lubricating oil flowing out through the second oil supply hole 53 can enter the first oil guiding flow path 71 through the oil passing hole 631 of the limit sleeve 63. Then, part of the lubricating oil in the first oil guiding flow path 71 can be transported to the first oil inlet hole 22 through the first oil distributing hole 72 for lubricating the first bearing 41 and the planetary gear 3, and the other part can be transported to the first motor bearing 61 through the second oil distributing hole 73 to lubricate the first motor bearing 61, thereby avoiding early fatigue spalling of the first motor bearing 61 and extending the service life of the first motor bearing 61. Thus, by the first oil guiding member 7, the oil from the second oil passage 51 is divided into two paths, and the first oil inlet hole 22 and the first motor bearing 61 can be supplied with oil simultaneously, so that the number of bearings that the transmission lubrication structure 100 can lubricate can be increased.

[0043] In some embodiments, the second oil passage 51 axially penetrates the motor shaft 5 along the axial direction of the motor shaft 5. A oil retaining seal cover 55 is provided at one end of the motor shaft 5 away from the second oil inlet hole 52. The oil retaining seal cover 55 is located on the side of the second oil supply hole 53 away from the second oil inlet hole 52, and the oil retaining seal cover 55 is in interference fit with the inner peripheral surface of the motor shaft 5. Therefore, it can be avoided that the lubricating oil flows out from the end of the motor shaft 5 away from the second oil inlet hole 52, and it can be avoided that the lubricating oil directly enters the housing 11, resulting in waste, and the utilization rate of the lubricating oil can be improved.

[0044] In some embodiments, a bearing circlip 64 is provided between the first motor bearing 61 and the housing 11. Therefore, the bearing circlip 64 can limit one end of the first motor bearing 61 away from the motor shaft 5, thereby improving the stability of the first motor bearing 61.

[0045] According to some embodiments of the present utility model, a second bearing 13 is provided between the housing 11 and the planet carrier 12. The second oil distribution hole 73 is used to supply oil to the second bearing 13. A third oil passage 14 extending radially along the motor shaft 5 is defined between the planet carrier 12 and the housing 11. The second bearing 13 is axially arranged along the motor shaft 5 between the inlet of the third oil passage 14 and the first oil supply hole 23. The outlet of the third oil passage 14 is used to supply oil to the first oil inlet hole 22. That is to say, the lubricating oil discharged through the second oil distribution hole 73 passes through the second bearing 13 during the process of flowing towards the first oil inlet hole 22, so that the second bearing 13 can be lubricated during the process of supplying oil to the first oil supply hole 23, thereby improving the lubrication efficiency of the transmission lubrication structure 100. In addition, by providing the second bearing 13, the friction between the planet carrier 12 and the housing 11 can be reduced, and the stability of the rotational movement of the planet carrier 12 can be improved.

[0046] According to some embodiments of the present utility model, the transmission lubrication structure 100 further includes: a second oil guiding member 8. The second oil guiding member 8 is arranged on the planet shaft 2 and a second oil guiding flow path 81 is formed inside. A fourth oil passage 82 communicating the third oil passage 14 and the second oil guiding flow path 81 is defined between the second oil guiding member 8 and the planet carrier 12. At least a part of the second oil guiding member 8 is inserted into the first oil passage 21 through the first oil inlet hole 22. A third oil supply hole 83 communicating with the second oil guiding flow path 81 is formed on the part of the second oil guiding member 8 inserted into the first oil passage 21. That is to say, a communicating flow path is formed among the third oil passage 14, the fourth oil passage 82, the second oil guiding flow path 81 and the first oil passage 21. Through the second oil guiding member 8, the lubricating oil at the third oil passage 14 can be stably guided into the first oil passage 21, that is, the lubricating oil passing through the second bearing 13 can sequentially enter the first oil passage 21 through the third oil passage 14, the fourth oil passage 82 and the second oil guiding flow path 81, thereby ensuring the stability of supplying lubricating oil into the first oil passage 21, and at the same time, the waste caused by the leakage of the lubricating oil during the flow from the third oil passage 14 to the first oil passage 21 can be avoided, which is beneficial to improving the utilization rate of the lubricating oil.

[0047] In some embodiments, the planet shaft 2 is fixedly press-fitted on the planet carrier 12, and the second oil guiding member 8 is clamped on the planet carrier 12 and is rotatable relative to the housing 11. Therefore, the second oil guiding member 8 can rotate with the rotation of the planet carrier 12, so that the second oil guiding member 8 can stably supply oil to the first oil passage 21.

[0048] According to some embodiments of the present utility model, the transmission lubrication structure 100 further includes: a motor shaft 5, an oil inlet nozzle 9, and a second motor bearing 62. The motor shaft 5 passes through the housing 11 and forms a second oil passage 51. A second oil inlet hole 52 communicating with the second oil passage 51 is formed on the axial end surface of the motor shaft 5. The oil inlet nozzle 9 passes through the second oil inlet hole 52 and is spaced apart from the inner peripheral surface of the second oil inlet hole 52 to form an oil supply gap 91. A fourth oil supply hole 54 communicating with the oil supply gap 91 is formed on the outer peripheral surface of the motor shaft 5 corresponding to the oil supply gap 91. The second motor bearing 62 is sleeved on one end of the motor shaft 5 located outside the housing 11. The fourth oil supply hole 54 is used to supply oil to the second motor bearing 62.

[0049] Among them, the oil inlet nozzle 9 is communicated with the lubricating oil supply structure, and the supply structure can transport lubricating oil into the second oil passage 51 through the oil inlet nozzle 9. Among them, a part of the lubricating oil entering the second oil passage 51 can flow toward the fourth oil supply hole 54 through the oil supply gap 91, and flow toward the outer peripheral side of the motor shaft 5 through the fourth oil supply hole 54 to contact the second motor bearing 62 located on the outer peripheral side of the motor shaft 5, so as to realize the lubrication of the second motor bearing 62, and further avoid the early fatigue spalling of the second motor bearing 62, which is beneficial to extending the service life of the second motor bearing 62.

[0050] Next, a vehicle according to a second aspect embodiment of the present utility model will be described with reference to the accompanying drawings.

[0051] The vehicle according to the second aspect embodiment of the present utility model includes: a transmission lubrication structure 100.

[0052] For the vehicle according to the second aspect embodiment of the present utility model, by providing first oil passing grooves 31 on both end faces on the axial direction of the planet gear 3, it is possible to avoid the situation that when one side of the planet gear 3 is tightly attached, all the lubricating oil flows out through the other side of the planet gear 3, resulting in the first bearing 41 on the tightly attached side not being fully lubricated. That is, it can ensure the normal flow of the oil passages on both axial sides of the planet gear 3, so that the first bearing 41 can be fully lubricated during the flow of the lubricating oil toward both axial sides of the planet gear 3 to avoid the early fatigue spalling of the first bearing 41, which is beneficial to extending the service life of the first bearing 41.

[0053] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0054] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0055] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A transmission lubrication structure, characterized in that: include: A housing and a planet carrier disposed in the housing; a planetary shaft, which is arranged on the planetary carrier and is formed with a first oil passage, wherein a first oil inlet hole communicating with the first oil passage is formed on an axial end surface of the planetary shaft, and a first oil supply hole communicating with the first oil passage is formed on an outer peripheral surface of the planetary shaft, and the lubricating oil entering the first oil passage is discharged to the outer peripheral surface of the planetary shaft through the first oil supply hole; The planetary gear is sleeved on the planetary shaft via a first bearing, and both side end faces of the planetary gear in the axial direction are provided with a first oil passage groove penetrating in the radial direction.

2. The transmission lubrication structure according to claim 1, characterized in that: The planetary gear is formed with a plurality of the first oil passage grooves on both side end surfaces in the axial direction, and the plurality of the first oil passage grooves on the same side are evenly spaced and arranged along the circumference of the planetary shaft.

3. The transmission lubrication structure according to claim 1, characterized in that: Two first bearings are arranged at intervals along the axial direction of the planetary shaft, the first oil supply hole is located between the two first bearings, a spacer sleeve is provided between the two first bearings, and second oil grooves that penetrate the spacer sleeve in a radial direction are formed on both side end surfaces of the spacer sleeve in the axial direction of the planetary shaft, and at least a part of the second oil groove is arranged opposite to the first oil supply hole in the radial direction of the planetary shaft.

4. The transmission lubrication structure according to claim 3, characterized in that: The second oil passage grooves located on both axial side end surfaces of the spacer are staggered along the circumferential direction of the spacer.

5. The transmission lubrication structure according to claim 3, characterized in that: The spacer sleeve is formed with a plurality of second oil passage grooves on both side end surfaces in the axial direction of the planetary shaft, and the plurality of second oil passage grooves located on the same side of the spacer sleeve are evenly spaced and arranged along the circumference of the spacer sleeve.

6. The transmission lubrication structure according to claim 1, characterized in that: Also includes: a motor shaft, which passes through the housing and has a first motor bearing between the motor shaft and the housing; a second oil circuit is formed in the motor shaft; a second oil inlet hole communicating with the second oil circuit is formed on the axial end surface of the motor shaft; and a second oil supply hole communicating with the second oil circuit is formed on the outer peripheral surface of the motor shaft; A limiting sleeve, which is sleeved on the motor shaft and is used to limit the position of the first motor bearing in the axial direction of the motor shaft, and the limiting sleeve is formed with an oil hole which is opposite to the second oil supply hole in the radial direction of the motor shaft; The first oil guide member is arranged in the housing and is in a ring shape sleeved on the outer peripheral side of the limiting sleeve. The first oil guide member and the limiting sleeve define a first oil guide flow path and a first oil distribution hole and a second oil distribution hole connected to the first oil guide flow path. The oil hole is used to supply oil to the first oil guide flow path, the first oil distribution hole is used to supply oil to the first oil supply hole, and the second oil distribution hole is used to supply oil to the first motor bearing.

7. The transmission lubrication structure according to claim 6, characterized in that: A second bearing is provided between the housing and the planetary carrier, the second oil distribution hole is used to supply oil to the second bearing, a third oil circuit extending radially along the motor shaft is defined between the planetary carrier and the housing, the second bearing is provided between the inlet of the third oil circuit and the first oil supply hole along the axial direction of the motor shaft, and the outlet of the third oil circuit is used to supply oil to the first oil inlet hole.

8. The transmission lubrication structure according to claim 7, characterized in that: Also includes: A second oil guide member is provided on the planetary shaft and forms a second oil guide flow path inside. A fourth oil path connecting the third oil path and the second oil guide flow path is defined between the second oil guide member and the planetary carrier. At least a portion of the second oil guide member is inserted into the first oil path through the first oil inlet hole. A third oil supply hole connected to the second oil guide flow path is formed on the portion of the second oil guide member inserted into the first oil path.

9. The transmission lubrication structure according to claim 1, characterized in that: Also includes: A motor shaft is passed through the housing and is provided with a second oil passage, and a second oil inlet hole communicating with the second oil passage is formed on an axial end surface of the motor shaft; an oil inlet nozzle, which is penetrated through the second oil inlet hole and is spaced apart from the inner circumference of the second oil inlet hole to form an oil supply gap, and a fourth oil supply hole which is in communication with the oil supply gap is formed on the outer circumference of the motor shaft corresponding to the oil supply gap; The second motor bearing is sleeved on one end of the motor shaft located outside the housing, and the fourth oil supply hole is used to supply oil to the second motor bearing.

10. A vehicle, characterized in that: include: A transmission lubrication structure according to any one of claims 1 to 9.

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