CN216279322U

CN216279322U - Power assembly and vehicle

Info

Publication number: CN216279322U
Application number: CN202122778245.5U
Authority: CN
Inventors: 张彤阳; 王才新
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-11-13
Filing date: 2021-11-13
Publication date: 2022-04-12
Anticipated expiration: 2031-11-13

Abstract

The utility model relates to a power assembly and a vehicle. The power assembly comprises a motor. The motor comprises a rotor shaft and a one-way valve, wherein the rotor shaft comprises an output end and a tail end far away from the output end. The output end is provided with an internal spline, the tail end of the output end is provided with an injection hole communicated with the spline cavity of the external and internal splines, and the injection hole is used for injecting a lubricant. The check valve is arranged at the injection hole, and the lubricant at the injection hole can only flow in a single direction into the injection hole through the check valve. The output end of the rotor shaft of the motor is provided with an internal spline, and when the motor is used, the internal spline is meshed with the external splines of other parts, so that the power generated by the motor can be output. The user can inject the lubricant directly from the injection port and act on the spline engagement. Therefore, the motor does not need to be assembled and disassembled, and the operation is very convenient. In addition, the one-way valve is arranged at the injection hole, so that the lubricant can be effectively prevented from leaking at the injection hole, the sealing performance of the motor is improved, and the lubricant is prevented from influencing other parts at the position of the injection hole.

Description

Power assembly and vehicle

Technical Field

The utility model relates to the technical field of vehicle power devices, in particular to a power assembly and a vehicle.

Background

With the development of vehicle technology and the change of world environment, electric vehicles driven by motors are increasingly popular in the market. The output end of the motor and the axle are usually engaged by a spline. In order to ensure long-term stable operation of the power system, excessive wear at the splines must be avoided, and the spline engagement area is greased.

In the conventional technology, a power system is usually disassembled, and meshed splines are separated, so that grease is directly applied to the spline, the mode is very complicated, and parts are easily damaged or lost due to disassembly and assembly. In addition, a mode of arranging an oil filling hole is adopted in part of schemes, and grease is filled into the spline through the oil filling hole, so that the whole sealing performance is poor, particularly, the grease is easily thrown out or leaked under the high-speed operation of a motor, the normal operation of other devices is influenced, and the acting time of filling the grease in a single time is also reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a power assembly that is easy to operate and has good sealing performance.

It is also necessary to provide a vehicle including the powertrain described above.

A powertrain, comprising:

the motor comprises a rotor shaft and a one-way valve, wherein the rotor shaft comprises an output end and a tail end far away from the output end, the output end is provided with an internal spline with a spline cavity, the tail end is provided with an injection hole communicated with the outside and the spline cavity, and the injection hole is used for injecting a lubricant; the check valve is arranged at the injection hole, and the lubricant at the injection hole can only flow in a single direction into the injection hole through the check valve.

In the power assembly, the output end of the rotor shaft of the motor is provided with the internal spline with the spline cavity, and when the power assembly is used, the internal spline is meshed with the external splines of other parts, so that the power generated by the motor can be output. The filling hole that communicates spline chamber and external world is seted up to the tail end of rotor shaft, and the user can directly pour into emollient into from the filling hole, and the rotation with the help of the rotor shaft simultaneously sends emollient to spline chamber better, and then plays a role in spline meshing department. Therefore, the motor does not need to be assembled and disassembled, and the operation is very convenient. In addition, other parts such as encoders are often installed at the position where the injection hole is located, and the check valve is arranged at the position of the injection hole, so that the injected lubricant can be effectively prevented from seeping out at the position or being thrown out under the operation of the motor, the sealing performance of the motor is improved, the lubricant is prevented from influencing other parts at the position of the injection hole, the lubricant loss is reduced, and the effective working time of injecting the lubricant once is prolonged.

In one embodiment, the power assembly further comprises an axle, the axle comprises a transmission shaft, one end of the transmission shaft is provided with an external spline, and the transmission shaft is in transmission connection with the motor through the external spline and the internal spline.

In one embodiment, the power assembly further comprises a sealing ring, and the sealing ring is sleeved on the transmission shaft and is located at the joint of the internal spline and the external spline.

In one embodiment, the transmission shaft includes a first section and a second section which are both cylindrical, the outer diameter of the first section is larger than that of the second section, the external spline is configured on the second section, the sealing ring is sleeved on the second section, and two sides of the sealing ring are respectively abutted to the end of the first section and the output end.

In one embodiment, the sealing ring is V_DA rubber seal ring is formed.

In one embodiment, the axle further comprises an axle housing, the transmission shaft is at least partially located in the axle housing, and the axle housing is connected with one side, close to the transmission shaft, of the motor.

In one embodiment, an annular groove is formed in the surface of the motor connected with the axle housing, and an adhesive tape is arranged in the annular groove.

In one embodiment, the rotor shaft is internally provided with a channel which extends lengthwise in the axial direction of the rotor shaft, and the injection hole communicates the outside with the spline cavity through the channel.

In one embodiment, a detachable end cover is arranged on one side of the motor close to the tail end, and the end cover completely covers the injection hole.

A vehicle comprises the power assembly.

Drawings

FIG. 1 is a schematic view of a powertrain according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the motor and the transmission shaft of the powertrain shown in FIG. 1;

FIG. 3 is a schematic structural view of a rotor shaft and a transmission shaft of the powertrain shown in FIG. 1;

FIG. 4 is an enlarged schematic view of the aft end of the rotor shaft shown in FIG. 3;

fig. 5 is an enlarged structural view of an output end of the rotor shaft shown in fig. 3.

100. A power assembly; 10. a motor; 11. a rotor shaft; 12. a one-way valve; 13. an injection hole; 14. an end cap; 15. a seal ring; 16. an adhesive tape; 20. an axle; 21. a drive shaft; 211. a first stage; 212. a second stage; 22. an axle housing; H. an output end; t, tail end; K. a spline cavity; p, a channel; s, axle housing installation surfaces.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3, a powertrain 100 according to an embodiment of the present invention includes a motor 10. The motor 10 includes a rotor shaft 11 and a one-way valve 12 (see fig. 4), and the rotor shaft 11 includes an output end H and a tail end T far from the output end H. The output end H is configured with an internal spline having a spline cavity K, the tail end T is provided with an injection hole 13 for communicating the outside with the spline cavity K (see fig. 5), and the injection hole 13 is used for injecting lubricant. The check valve 12 is provided at the injection hole 13, and the lubricant at the injection hole 13 can flow only in one direction into the injection hole 13 through the check valve 12.

In the power assembly 100, the output end H of the rotor shaft 11 of the motor 10 is configured with an internal spline having a spline cavity K, and when in use, the internal spline is engaged with an external spline of another component, so that the power generated by the motor 10 can be output. The injection hole 13 that communicates spline chamber K with the external world is seted up to rotor shaft 11's tail end T, and the user can directly pour into the emollient into from injection hole 13, and the rotation with the help of rotor shaft 11 simultaneously sends the emollient to spline chamber K better, and then plays a role in spline meshing department. Therefore, the motor 10 does not need to be assembled and disassembled, and is very convenient. In addition, other parts such as an encoder and the like are often installed at the position of the injection hole 13, the one-way valve 12 is arranged at the position of the injection hole 13, so that the injected lubricant can be effectively prevented from seeping out at the position or being thrown out under the operation of the motor 10, the sealing performance of the motor 10 is improved, the lubricant is prevented from influencing other parts at the position of the injection hole 13, the lubricant loss is reduced, and the effective working time of injecting the lubricant once is prolonged.

Further, the rotor shaft 11 is internally configured with a passage P extending lengthwise in the axial direction of the rotor shaft 11, and the injection hole 13 communicates the outside with the spline cavity K through the passage P. Under the condition that rotor shaft 11 is longer or the internal spline is shorter, filling hole 13 usually can not be directly connected with spline chamber K, can communicate spline chamber K and filling hole 13 through constructing passageway P in rotor shaft 11's inside, and the lubricant that so injects can get into spline chamber K through filling hole 13, again through passageway P.

Further, a detachable end cap 14 is provided on a side of the motor 10 near the rear end T, and the end cap 14 completely covers the injection hole 13. The end cover 14 can be detached when a user needs to inject the lubricant, and the end cover 14 is installed to improve the integrity of the motor 10 and prevent the injection hole 13 and the check valve 12 from being exposed to the outside to cause damage or blockage caused by dust and impurities.

Specifically, the lubricant is lithium complex grease. The lubricant can play a role in lubrication, reduce resistance and friction force and play a role in protecting the gear, so that the service life of the spline is longer, the fatigue resistance of the spline is improved, the surface abrasion is reduced, the vibration and noise of transmission are reduced, and the damage of surface gluing at a meshing part is avoided. In addition, the composite lithium-based lubricating grease has very high dropping point (higher than 260 ℃), excellent high-temperature fluidity, excellent mechanical stability, excellent water resistance, antirust property, oxidation stability and very good lubricating extreme pressure performance. In this embodiment, the No. 2 lithium complex grease is selected, and the hardness of the No. 2 lithium complex grease is suitable, and is often used for lubricating the components of the complex mechanical equipment.

In some embodiments, the powertrain 100 further includes an axle 20, the axle 20 includes a transmission shaft 21, and one end of the transmission shaft 21 is configured with external splines and is in transmission connection with the motor 10 through the external splines and the internal splines. In this manner, power output by the motor 10 may be transmitted to vehicle structures such as wheels through the axle 20.

Further, the power assembly 100 further includes a sealing ring 15, and the sealing ring 15 is sleeved on the transmission shaft 21 and located at a joint of the internal spline and the external spline. The seal ring 15 seals the junction of the internal spline and the external spline to prevent lubricant leakage from there. Wherein the seal ring 15 isV_DA rubber seal ring is formed. V_DThe rubber sealing ring has good sealing effect and is very suitable for sealing a rotating shaft.

Furthermore, the transmission shaft 21 includes a first section 211 and a second section 212, both of which are cylindrical, an outer diameter of the first section 211 is larger than an outer diameter of the second section 212, the external spline is configured on the second section 212, the sealing ring 15 is sleeved on the second section 212, and both sides of the sealing ring 15 are respectively abutted to an end of the first section 211 and the output end H. The sealing ring 15 is located at the end of the first section 211 and the end of the output end H, so that the joint of the first end and the output end H can be well sealed, and further the meshing position of the internal spline and the external spline is sealed.

Specifically, the axle 20 further includes an axle housing 22, the transmission shaft 21 being at least partially located within the axle housing 22, the axle housing 22 being connected to a side of the motor 10 adjacent to the transmission shaft 21. Specifically, in the present embodiment, an axle housing mounting surface S is formed on one side of the motor 10 close to the transmission shaft 21, and bolt holes are opened in the axle housing mounting surface S, and the axle housing 22 is fixed on the axle housing mounting surface S by bolts. The axle housing 22 is connected with the motor 10 to protect the transmission shaft 21, isolate the transmission shaft 21 and the output end H of the motor 10 from the outside, and provide installation space for other transmission components to better output the power of the motor 10.

More specifically, the surface of the motor 10 that is coupled to the axle housing 22 defines an annular groove and the adhesive strip 16 is disposed within the annular groove. Eliminate the gap that motor 10 and axle housing 22's connection produced through adhesive tape 16, make axle housing 22 inside and outside keep apart better, possess good dustproof and waterproof effect. In the present embodiment, the adhesive tape 16 is a butyl adhesive tape, which has good chemical stability, adhesion, water resistance, sealing property, low temperature resistance, following property, and dimensional stability.

When the power assembly 100 is used, the end cover 14 on one side of the motor 10 is detached, so that the No. 2 compound lithium grease can be injected into the injection hole 13, and the No. 2 compound lithium grease flows into the hole in a one-way mode through the one-way valve 12 on the injection hole 13 and flows into the spline cavity K through the channel P, so that the lubrication effect is achieved at the meshing position of the internal spline and the external spline. Further, the power of the motor 10 is transmitted to the propeller shaft 21 of the axle 20 through the external spline engaged with the internal spline to perform power output. Check valve 12 can avoid emollient to throw away from tail end T, and sealing washer 15 is established to the cover on the second end of transmission shaft 21, and the both sides of sealing washer 15 respectively with the first end of transmission shaft 21 and the tip butt of output H, seal output H, avoid emollient to reserve by here. The axle housing 22 of the axle 20 is connected to the side of the motor 10 near the output end H, and is provided with a butyl rubber strip to prevent dust and drain water.

An embodiment of the present invention further provides a vehicle including the powertrain 100 described above. By adopting the power assembly 100, the lubricant does not need to be detached and injected frequently, the lubricant does not leak, the power assembly 100 has good sealing performance, and can work stably for a long time.

The spline meshing length needs to be checked and calculated by combining with the requirements of vehicle running conditions, and the tooth surface allowable contact strength, tooth root allowable bending strength, tooth root allowable shearing strength, external spline torsion and bending strength, tooth surface abrasion allowable pressure stress and tooth surface pressure stress of the spline under the selected meshing length need to be ensured to meet the requirements.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A powertrain, comprising:

2. The powertrain of claim 1, further comprising an axle including a drive shaft configured with external splines on one end and drivingly connected to the motor by the external splines and the internal splines.

3. The powertrain of claim 2, further comprising a seal ring disposed on the transmission shaft and located at a junction of the internal spline and the external spline.

4. The powertrain of claim 3, wherein the transmission shaft includes a first section and a second section that are both cylindrical, an outer diameter of the first section is larger than an outer diameter of the second section, the external spline is configured at the second section, the sealing ring is sleeved at the second section, and two sides of the sealing ring are respectively abutted against an end of the first section and the output end.

5. A drive assembly according to claim 3, wherein the seal ring is V_DA rubber seal ring is formed.

6. The powertrain of claim 2, wherein the axle further comprises an axle housing, the drive shaft being at least partially disposed within the axle housing, the axle housing being connected to the side of the motor proximate the drive shaft.

7. The power assembly as claimed in claim 6, wherein an annular groove is formed on the surface of the motor connected with the axle housing, and an adhesive tape is arranged in the annular groove.

8. A power assembly according to claim 1, wherein the rotor shaft is internally configured with a channel extending lengthwise in the axial direction of the rotor shaft, and the injection hole communicates the outside with the spline cavity through the channel.

9. The power assembly according to claim 1, wherein a detachable end cover is arranged on one side of the motor close to the tail end, and the end cover completely covers the injection hole.

10. A vehicle comprising a powertrain according to any of claims 1-9.