DESC:Field of Invention
[001] The invention relates to transmission provided in a commercial vehicle. It more particularly relates to axle mounted transmission provided in a commercial vehicle powered by an electric motor.
Background of the Invention
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[003] Electric vehicle batteries that currently exist have very limited energy density. Even though this problem is being dealt with through constant research and development, the rate of progress in improving the energy density of batteries has been slower than desired. Engineers working in the field of electric vehicles have had to deal with this problem by optimising the shape, size, and weight of every other feature included in the vehicle. While solving this problem may appear to be as simple as reducing the size to reduce weight, it isn’t really that simple because the end result has to be a feature in an electric vehicle that is at least as capable of handling operational loads as IC engine-powered vehicles on the roads today.
[004] The transmission of an electric vehicle is also one such component that is being optimised to allow the vehicle to weigh less and have more space for additional features or batteries. Given the unique torque curves of typical electric motors and the need to justify each minor additional unit of weight in electric vehicles, making a worthwhile transmission for an electric vehicle presents a really challenging weight reduction and packaging problem that continues to plague the industry despite extensive efforts to resolve it.
[005] This problem is unique in the sense that usual solutions, like mounting the electric motors on the wheels directly, present their own unique set of challenges, resolving which requires the use of complex engineering designs, special materials, and manufacturing methods. Such challenges include but are not limited to protecting electric motors from natural elements and extreme vibrations while ensuring sufficient ground clearance. Resolving all these issues inevitably raises prices. Given that the market is sensitive to the price of the product, there is a need for a simple and economical solution that uses a gear train assembly to transmit rotations from the electric motor to the wheels. This ideal gear train assembly has to be compact, strong, and efficient enough to fulfil the requirements imposed on the transmission of an electric vehicle while weighing less and even cost less than other comparable solutions. Therefore, the objective of the present invention is to provide a gear train assembly for electric vehicles that is cost-effective, lightweight, and compact and ensures good ground clearance.
[006] It is another objective of the present invention to provide a gear train assembly for electric vehicles that is reliable enough to handle operational loads without breaking down.
[007] It is yet another objective of the present invention to provide a gear train assembly for electric vehicles that is good at keeping itself lubricated so that unnecessary friction and its associated loss of power is kept to the minimum.
[008] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[009] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0010] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.
Summary of the Invention
[0011] The gear train assembly for the e-axle, achieving all the stated objectives in accordance with the first preferred embodiment of the invention, comprises of, a housing, a shaft with integral gear, bearings, a mounted gear, a shaft with integral gear, bearings, a gear wheel, another housing (43H), and a pin, top and bottom bevel gears, side bevel gears, fastening means (48F), and fastening means (45LH, 45RH).
[0012] The housing of the gear train assembly for the e-axle is provided with multiple external mounting points. This housing is attached to the vehicle chassis through the external mounting points along a mounting point. The flange attaches a lower portion of the housing to the differential housing. The housing (40) is provided with three shaft accommodating locations (41C, 42C, and 43C) with the shaft accommodating location (41C) being in an upper portion of the housing (40). The shaft accommodating location (41C) being in the middle portion of the housing (40), and shaft accommodation location (43C) being in a lower portion of said housing (40). The shaft accommodating locations are so positioned in the housing (40) that an imaginary line passing through the centre of shaft accommodating locations (42C and 43C) makes an angle ? with the imaginary line passing through the centre of shaft accommodating locations (41C and 42C).
[0020] Within said housing (40) and at the shaft accommodating location (41C), the shaft with integral gear (41) is mounted through bearings (41B) provided at the two ends within said housing (40) at the shaft accommodating location (41C). The integral gear of said shaft with integral gear (41) meshes with the mounted gear (42BG). The mounted gear (42BG) is mounted and fixed on the shaft with integral gear (42HS). The shaft with integral gear (42HS) is accommodated at the shaft accommodating location (42C) through bearings (42B) provided at the two ends within said housing (40). The integral gear of the shaft with integral gear (42HS) meshes with the gear wheel (47GW).
[0021] The gear wheel (47GW) is mounted and attached to the housing (43H) by fastening means (48F). The housing (43H) is fitted with the pin (43P) within its confined structure on the same plane as the gear wheel (47GW). The pin (43P) receives the top and bottom bevel gears (43TG) at its two ends within the housing (43H), the housing (43H) has two openings that are perpendicular to the location of top and bottom bevel gears (43TG). Said openings accommodate side bevel gears (43SG). The top and bottom bevel gears (43TG) and the side bevel gears (43SG) are positioned within the housing (43H) so as to be in constant mesh with each other. The side bevel gears (43SG) received within the two openings of housing (43H) further receive the ends of shafts (15) from both sides of the vehicle within themselves.
[0022] The fastening means (45LH, and 45RH) are fastened at openings provided at level with the lower end of the housing (43H) on the housing (40), said fastening means (45LH and 45RH) hold a set of bearings (43SB) in their place under an applied force.
Brief Description of Drawings
[0013] The present invention is illustrated in the accompanying drawings that contain references numerals for indicating its various parts. The description of the present invention would therefore be better understood with reference to accompanying diagrams, wherein
[0014] Figure 1 discloses a view of the gear train assembly for e-axle in accordance with a preferred embodiment of the present invention as installed on the commercial vehicle.
[0015] Figure 2 discloses a side view of the preferred embodiment of the present invention as disclosed in Figure 1.
[0016] Figure 3 discloses a cut section view of the preferred embodiment of the present invention shown in Figure 1.
[0017] Figure 4 a cut section view of another preferred embodiment of the present invention.
Detailed Description of the Invention
[0018] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such details as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0019] Referring to the set of figures 1, 2, and 3, a gear train assembly for e-axle (100), in accordance with the first preferred embodiment of the invention, comprises of, a housing (40), a shaft with integral gear (41), bearings (41B), a mounted gear (42BG), a shaft with integral gear (42HS), bearings (42B), a gear wheel (47GW), a housing (43H), and a pin (43P), top and bottom bevel gears (43TG), side bevel gears (43SG), fastening means (48F), and fastening means (45LH, 45RH).
[0020] The housing (40) (refer Fig. 2) is provided with multiple external mounting points (40MP1, 40MP2, 40MP3). The housing (40) (refer Figs. 1 and 2) is attached to the vehicle chassis (10) through the external mounting points along at a mounting point (5). The flange (40R) attaches a lower portion of the housing (40) to the differential housing (20). The housing (40) is provided with three shaft accommodating locations (41C, 42C, and 43C) with the shaft accommodating location (41C) being in an upper portion of the housing (40). The shaft accommodating location (41C) being in the middle portion of the housing (40), and shaft accommodation location (43C) being in a lower portion of said housing (40). The shaft accommodating locations are so positioned in the housing (40) that an imaginary line passing through the centre of shaft accommodating locations (42C and 43C) makes an angle ? with the imaginary line passing through the centre of shaft accommodating locations (41C and 42C).
[0021] Within said housing (40) (refer Figs. 2 and 3) and at the shaft accommodating location (41C), the shaft with integral gear (41) is mounted through bearings (41B) provided at the two ends within said housing (40) at the shaft accommodating location (41C). The integral gear of said shaft with integral gear (41) meshes with the mounted gear (42BG). The mounted gear (42BG) is mounted and fixed on the shaft with integral gear (42HS). The shaft with integral gear (42HS) is accommodated at the shaft accommodating location (42C) through bearings (42B) provided at the two ends within said housing (40). The integral gear of the shaft with integral gear (42HS) meshes with the gear wheel (47GW).
[0022] The gear wheel (47GW) (refer Fig 3) is mounted and attached to the housing (43H) by fastening means (48F). The housing (43H) is fitted with the pin (43P) within its confined structure on the same plane as the gear wheel (47GW). The pin (43P) receives the top and bottom bevel gears (43TG) at its two ends within the housing (43H), the housing (43H) has two openings that are perpendicular to the location of top and bottom bevel gears (43TG). Said openings accommodate side bevel gears (43SG). The top and bottom bevel gears (43TG) and the side bevel gears (43SG) are positioned within the housing (43H) so as to be in constant mesh with each other. The side bevel gears (43SG) received within the two openings of housing (43H) further receive the ends of shafts (15) from both sides of the vehicle within themselves.
[0023] The fastening means (45LH, and 45RH) (refer Fig. 3) are fastened at openings provided at level with the lower end of the housing (43H) on the housing (40), said fastening means (45LH and 45RH) hold a set of bearings (43SB) in their place under an applied force.
[0024] In the gear train assembly for e-axle (100), in accordance with the first preferred embodiment of the invention, an external shield (35) is mounted on the lower surface of the housing (40) using the external mounting points and conventional fastening means; the shaft with integral gear (42HS) is a hollow shaft; the side bevel gears (43SG), accommodated within a lower portion of the housing (40), have splines on their inside surface to firmly receive and connect with the ends of the shaft (15); the lower portion of said housing (40) is provided with a rib (40R) that attaches said housing (40) to the differential housing (20) by utilising fastening means (25); the bearings (43SB) are provided at the two ends of the housing (43H) and are positioned so as to be located between the housing (43H) and the housing (40), said bearings (43SB) support the ends of the housing (43H) on the lower portion of the housing (40); an electric motor (3) is attached externally with the housing (40), utilising the external attachment points and fastening means, and at an alignment such that the rotating shaft of said electric motor (3) is received and connected with said shaft with integral gear (41); and the shaft accommodating locations are so positioned in the housing (40) that an imaginary line passing through the centre of shaft accommodating locations (42C and 43C) makes an angle ? with the imaginary line passing through the centre of shaft accommodating locations (41C and 42C) which is equal to 20 degrees.
[0025] Given the construction as disclosed by Figs. 1 to 3, when the electric motor (3) provides a rotational input to the integral gear of said shaft with integral gear (41), it causes this rotational input to be transmitted to the shafts (15), via the transmission path formed by the shaft with integral gear (41), the mounted gear (42BG), a shaft with integral gear (42HS), a gear wheel (47GW), a housing (43H), and a pin (43P), top and bottom bevel gears (43TG), and the side bevel gears (43SG), in the order as mentioned. A reduction is achieved with the help of said assembly, as disclosed for the present invention, the gear train assembly for e-axle (100). When the vehicle is turning, a housing (43H), and a pin (43P), top and bottom bevel gears (43TG), and the side bevel gears (43SG), function as a differential assembly and allow one shaft (15) received in either of the side bevel gears (43SG) to rotate faster or slower than the other shaft (15). The shield (35) protects the gear train assembly for e-axle (100), in accordance with the first preferred embodiment of the invention, from being damaged by foreign elements such as stones.
[0026] The rotating gears within the housing (40), assisted by the inside surfaces of the housing (40), perform the secondary function of directing lubricants to different portions and components within the housing (40) of the gear train assembly for e-axle (100). The gear train assembly for the e-axle (100), so disclosed, has a very compact layout; it is lightweight, capable of ensuring proper lubrication of components provided within its housing, and also capable of offering a good level of ground clearance when provided on the vehicle at the disclosed position on the vehicle’s axle.
[0027] Referring to figure 4, a gear train assembly for e-axle (100B), in accordance with the second preferred embodiment of the invention, comprises of, a housing (40B), a shaft with integral gear (51), bearings (51B), a mounted gear (52BG), a shaft with integral gear (52), bearings (52SB), a flange (57MF), fastening means (57F), a gear wheel (57GW), a housing (53H), a pin (53P), top and bottom bevel gears (53TG), side bevel gears (53SG), fastening means (58F), and fastening means (55LH, 55RH).
[0028] The housing (40B) (refer Fig. 4) is provided with multiple external mounting points (40MP1, 40MP2, 40MP3), the housing (40B) is attached to the vehicle chassis (10) through the external mounting points along at a mounting point (5), the flange (50R) attached a lower portion of the housing (50) to the differential housing (20). The housing (40B) is provided with three shaft accommodating locations (51C, 52C, and 53C) with the shaft accommodating location (51C) being in an upper portion of the housing (40B). The shaft accommodating location (51C) being in the middle portion of the housing (40B), and shaft accommodation location (53C) being in a lower portion of said housing (40B). The shaft accommodating locations are so positioned in the housing (40B) that an imaginary line passing through the centre of shaft accommodating locations (52C and 53C) makes an angle ß with the imaginary line passing through the centre of shaft accommodating locations (51C and 52C).
[0029] Within said housing (40B) (refer Fig. 4) and at the shaft accommodating location (51C), the shaft with integral gear (51) is mounted though bearings (51B) provided at the two ends within said housing (40B) at the shaft accommodating location (51C). The integral gear of said shaft with integral gear (51) meshes with the mounted gear (42BG). The mounted gear (52BG) is mounted and fixed on the shaft with integral gear (52). The shaft with integral gear (52) is accommodated at the shaft accommodating location (52C) through bearings (52SB) provided at the two ends within said housing (40B). The integral gear of the shaft with integral gear (52) meshes with the gear wheel (57GW).
[0030] The gear wheel (57GW) (refer Fig. 4) is mounted and attached to the housing (53H) by fastening means (58F). The housing (53H) is fitted with the pin (53P) within its confined structure. The pin (53P) receives top and bottom bevel gears (53TG) at its two ends within the housing (53H). The housing (53H) has two openings that are perpendicular to the location of top and bottom bevel gears (53TG). The openings accommodate side bevel gears (53SG). The top and bottom bevel gears (53TG) and the side bevel gears (53SG) are positioned within the housing (53H) so as to be in constant mesh with each other, the side bevel gears (53SG) received within the two openings of housing (53H) further receive the ends of shafts (15) from both sides of the vehicle within themselves.
[0031] The fastening means (55LH, and 55RH) (refer Fig. 4) are fastened at openings provided at level with the lower end of the housing (53H) on the housing (40B), said fastening means (55LH and 55RH) hold a set of bearings (53SB) in their place under an applied force.
[0032] In the gear train assembly for e-axle (100B) (refer Fig. 4), in accordance with the second preferred embodiment of the present invention, the shaft with integral gear (51) and the shaft with integral gear (52) are hollow shafts; the side bevel gears (53SG), accommodated in the lower portion of the housing (40B), have splines on their inside surface to firmly receive and connect with the ends of the shaft (15); the two portions of the housing (53H) are attached by means of fastening means (59F) at attachment points provided on the periphery of the two portions of said housing (53H); the mounted gear (52BG) is positioned on the shaft with integral gear (52) at a location that is beside the bearing (52SB) given on the right side of the shaft accommodating location (52C) in the housing (40B); said bearings (53SB) are provided at the two ends of the housing (53H) and are positioned so as to be located between the housing (53H) and the housing (40B), said bearings (53SB) support the ends of the housing (53H) on the lower portion of the housing (40B); and the flange (57MF) is received on the end of the shaft with integral gear (52) projecting out of the other end of the shaft accommodating location (52C) of the housing (40B), and the flange (57MF) is provided with fastening means (57F), the flange (57MF) is connected with parking brake system of the vehicle.
[0033] In the gear train assembly for e-axle (100B), in accordance with the second preferred embodiment of the present invention, an external shield (35) is mounted on the lower surface of the housing (40B) using the external mounting points and conventional fastening means; the side bevel gears (53SG), accommodated within a lower portion of the housing (40B), have splines on their inside surface to firmly receive and connect with the ends of the shaft (15); the lower portion of said housing (40B) is provided with a rib (50R) that attaches said housing (40B) to the differential housing (20) by utilising fastening means (25); an electric motor (3) is attached externally with the housing (40B), utilising the external attachment points and fastening means, and at an alignment such that the rotating shaft of said electric motor (3) is received and connected with said shaft with integral gear (51); and the shaft accommodating locations are so positioned in the housing (40B) that an imaginary line passing through the centre of shaft accommodating locations (52C and 53C) makes an angle ß with the imaginary line passing through the centre of shaft accommodating locations (51C and 42C) that is equal to zero degrees. The angle ß being equal to zero degrees means that the three shaft accommodating locations (51C, 52C, and 53C) are perfectly aligned in a straight line.
[0034] Given the construction as disclosed by Fig. 4, when the electric motor (3) provides a rotational input to the integral gear of said shaft with integral gear (51), it causes this rotational input to be transmitted to the shafts (15), via the transmission path formed by the shaft with integral gear (51), the mounted gear (52BG), a shaft with integral gear (52), a gear wheel (57GW), a housing (53H), and a pin (53P), top and bottom bevel gears (53TG), and the side bevel gears (53SG), in the order as mentioned. A reduction is achieved with the help of said assembly, as disclosed for the present invention, the gear train assembly for the e-axle (100B). When the vehicle is turning, a housing (53H), and a pin (53P), top and bottom bevel gears (53TG), and the side bevel gears (53SG), function as a differential assembly and allow one shaft (15) received in either of the side bevel gears (53SG) to rotate faster or slower than the other shaft (15).
[0035] The shield (35) protects the gear train assembly for e-axle (100B), in accordance with the first preferred embodiment of the invention, from being damaged by foreign elements such as stones. The flange (57MF) connected with the parking brake system (utilising fastening means (57F)), prevents the rotation of the shaft with integral gear (52), thereby preventing further transmission of rotational output through it to the shafts (15), when the parking brake system is operational.
[0036] The rotating gears within the housing (40B), assisted by the inside surfaces of the housing (40B), perform the secondary function of directing lubricants to different portions and components within the housing (40B) of the gear train assembly for e-axle (100B). The gear train assembly for the e-axle (100B), so disclosed, has a very compact layout; it is lightweight, capable of ensuring proper lubrication of components provided within its housing, and also capable of offering a good level of ground clearance when provided on the vehicle at the disclosed position on the vehicle’s axle.
[0037] The gear train assembly for e-axle (100, 100B), in accordance with the present invention achieves all the stated objectives.
[0038] Technical advantages offered by the invention i.e., a gear train assembly for e-axle are-
- It is light in weight.
- It is compact.
- It provides good ground clearance.
- It is capable of effectively lubricating of its sub-components.
[0039] It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the present invention has been herein described in terms of its preferred embodiment, those skilled in the art will recognize that the preferred embodiment herein disclosed, can be practiced with modifications within the scope of the invention herein described.
[0063] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refers to at least one of something selected from the group consisting of A, B, C ….and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc. The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the appended claims.
[0064] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

Yours Faithfully

ANIL KUMAR PANDEY
(IN P/A 2359)
AGENT FOR THE APPLICANT(S)

,CLAIMS:We Claim,
1. A gear train assembly for e-axle (100) comprising,
• A housing (40),
• A shaft with integral gear (41),
• Bearings (41B),
• A mounted gear (42BG),
• A shaft with integral gear (42HS),
• Bearings (42B),
• A gear wheel (47GW),
• A housing (43H),
• A pin (43P),
• Top and bottom bevel gears (43TG),
• Side bevel gears (43SG),
• Fastening means (48F), and
• Fastening means (45LH, 45RH),
wherein,
- the housing (40) is provided with multiple external mounting points (40MP1, 40MP2, 40MP3), the housing (40) is attached to the vehicle chassis (10) through the external mounting points along at a mounting point (5), the flange (40R) attaches a lower portion of the housing (40) to the differential housing (20);
- the housing (40) is provided with three shaft accommodating locations (41C, 42C, and 43C) with the shaft accommodating location (41C) being in an upper portion of the housing (40), the shaft accommodating location (41C) being in the middle portion of the housing (40), and shaft accommodation location (43C) being in a lower portion of said housing (40), the shaft accommodating locations are so positioned in the housing (40) that an imaginary line passing through the centre of shaft accommodating locations (42C and 43C) makes an angle ? with the imaginary line passing through the centre of shaft accommodating locations (41C and 42C);
- Within said housing (40) and at the shaft accommodating location (41C), the shaft with integral gear (41) is mounted though bearings (41B) provided at the two ends within said housing (40) at the shaft accommodating location (41C), the integral gear of said shaft with integral gear (41) meshes with the mounted gear (42BG), the mounted gear (42BG) is mounted and fixed on the shaft with integral gear (42HS), the shaft with integral gear (42HS) is accommodated at the shaft accommodating location (42C) through bearings (42B) provided at the two ends within said housing (40), the integral gear of the shaft with integral gear (42HS) meshes with the gear wheel (47GW), the gear wheel (47GW) is mounted and attached to the housing (43H) by fastening means (48F), the housing (43H) is fitted with the pin (43P) within its confined structure on the same plane as the gear wheel (47GW), the pin (43P) receives the top and bottom bevel gears (43TG) at its two ends within the housing (43H), the housing (43H) has two openings that are perpendicular to the location of top and bottom bevel gears (43TG), said openings accommodate side bevel gears (43SG), the top and bottom bevel gears (43TG) and the side bevel gears (43SG) are positioned within the housing (43H) so as to be in constant mesh with each other, the side bevel gears (43SG) received within the two openings of housing (43H) further receive the ends of shafts (15) from both sides of the vehicle within themselves; and
- the fastening means (45LH, and 45RH) are fastened at openings provided at level with the lower end of the housing (43H) on the housing (40), said fastening means (45LH and 45RH) hold a set of bearings (43SB) in their place under an applied force.
2. The gear train assembly for e-axle (100) as claimed in claim 1, wherein,
- an external shield (35) is mounted on the lower surface of the housing (40) using the external mounting points and conventional fastening means;
- the shaft with integral gear (42HS) is a hollow shaft;
- the side bevel gears (43SG), accommodated within a lower portion of the housing (40), have splines on their inside surface to firmly receive and connect with the ends of the shaft (15);
- the lower portion of said housing (40) is provided with a rib (40R) that attaches said housing (40) to the differential housing (20) by utilising fastening means (25);
- said bearings (43SB) are provided at the two ends of the housing (43H) and are positioned so as to be located between the housing (43H) and the housing (40), said bearings (43SB) support the ends of the housing (43H) on the lower portion of the housing (40);
- an electric motor (3) is attached externally with the housing (40), utilising the external attachment points and fastening means, and at an alignment such that the rotating shaft of said electric motor (3) is received and connected with said shaft with integral gear (41); and
- the shaft accommodating locations are so positioned in the housing (40) that an imaginary line passing through the centre of shaft accommodating locations (42C and 43C) makes an angle ? with the imaginary line passing through the centre of shaft accommodating locations (41C and 42C) which is equal to 20 degrees.
3. A gear train assembly for e-axle (100B) comprising,
• A housing (40B),
• A shaft with integral gear (51),
• Bearings (51B),
• A mounted gear (52BG),
• A shaft with integral gear (52),
• Bearings (52SB),
• A flange (57MF),
• Fastening means (57F),
• A gear wheel (57GW),
• A housing (53H),
• A pin (53P),
• Top and bottom bevel gears (53TG),
• Side bevel gears (53SG),
• Fastening means (58F), and
• Fastening means (55LH, 55RH),
wherein,
- the housing (40B) is provided with multiple external mounting points (40MP1, 40MP2, 40MP3), the housing (40B) is attached to the vehicle chassis (10) through the external mounting points along at a mounting point (5), the flange (50R) attached a lower portion of the housing (50) to the differential housing (20);
- the housing (40B) is provided with three shaft accommodating locations (51C, 52C, and 53C) with the shaft accommodating location (51C) being in an upper portion of the housing (40B), the shaft accommodating location (51C) being in the middle portion of the housing (40B), and shaft accommodation location (53C) being in a lower portion of said housing (40B), the shaft accommodating locations are so positioned in the housing (40B) that an imaginary line passing through the centre of shaft accommodating locations (52C and 53C) makes an angle ß with the imaginary line passing through the centre of shaft accommodating locations (51C and 52C);
- within said housing (40B) and at the shaft accommodating location (51C), the shaft with integral gear (51) is mounted though bearings (51B) provided at the two ends within said housing (40B) at the shaft accommodating location (51C), the integral gear of said shaft with integral gear (51) meshes with the mounted gear (42BG), the mounted gear (52BG) is mounted and fixed on the shaft with integral gear (52), the shaft with integral gear (52) is accommodated at the shaft accommodating location (52C) through bearings (52SB) provided at the two ends within said housing (40B), the integral gear of the shaft with integral gear (52) meshes with the gear wheel (57GW), the gear wheel (57GW) is mounted and attached to the housing (53H) by fastening means (58F), the housing (53H) is fitted with the pin (53P) within its confined structure, the pin (53P) receives top and bottom bevel gears (53TG) at its two ends within the housing (53H), the housing (53H) has two openings that are perpendicular to the location of top and bottom bevel gears (53TG), said openings accommodate side bevel gears (53SG), the top and bottom bevel gears (53TG) and the side bevel gears (53SG) are positioned within the housing (53H) so as to be in constant mesh with each other, the side bevel gears (53SG) received within the two openings of housing (53H) further receive the ends of shafts (15) from both sides of the vehicle within themselves; and
- the fastening means (55LH, and 55RH) are fastened at openings provided at level with the lower end of the housing (53H) on the housing (40B), said fastening means (55LH and 55RH) hold a set of bearings (53SB) in their place under an applied force.
4. The gear train assembly for e-axle (100B) as claimed in claim 5, wherein,
- the shaft with integral gear (51) and the shaft with integral gear (52) are hollow shafts;
- the side bevel gears (53SG), accommodated in the lower portion of the housing (40B), have splines on their inside surface to firmly receive and connect with the ends of the shaft (15);
- the two portions of the housing (53H) are attached by means of fastening means (59F) at attachment points provided on the periphery of the two portions of said housing (53H);
- the mounted gear (52BG) is positioned on the shaft with integral gear (52) at a location that is beside the bearing (52SB) given on the right side of the shaft accommodating location (52C) in the housing (40B);
- said bearings (53SB) are provided at the two ends of the housing (53H) and are positioned so as to be located between the housing (53H) and the housing (40B), said bearings (53SB) support the ends of the housing (53H) on the lower portion of the housing (40B); and
- the flange (57MF) is received on the end of the shaft with integral gear (52) projecting out of the other end of the shaft accommodating location (52C) of the housing (40B), and the flange (57MF) is provided with fastening means (57F), the flange (57MF) is connected with parking brake system of the vehicle.
5. The gear train assembly for e-axle (100B) as claimed in claim 6, wherein,
- an external shield (35) is mounted on the lower surface of the housing (40B) using the external mounting points and conventional fastening means;
- the side bevel gears (53SG), accommodated within a lower portion of the housing (40B), have splines on their inside surface to firmly receive and connect with the ends of the shaft (15);
- the lower portion of said housing (40B) is provided with a rib (50R) that attaches said housing (40B) to the differential housing (20) by utilising fastening means (25);
- an electric motor (3) is attached externally with the housing (40B), utilising the external attachment points and fastening means, and at an alignment such that the rotating shaft of said electric motor (3) is received and connected with said shaft with integral gear (51); and
- the shaft accommodating locations are so positioned in the housing (40B) that an imaginary line passing through the centre of shaft accommodating locations (52C and 53C) makes an angle ß with the imaginary line passing through the centre of shaft accommodating locations (51C and 42C) that is equal to zero degrees.
Dated 12th day of March 2024
Yours Faithfully

ANIL KUMAR PANDEY
(IN P/A 2359)
AGENT FOR THE APPLICANT(S)