CN220527803U - Electric drive transmission - Google Patents

Abstract

The application provides an electric drive transmission device, which comprises a shell, a rotating shaft, a bearing and a wear-resistant gasket. The rotating shaft is positioned in the space surrounded by the shell. The bearing is assembled to the shaft. The wear-resistant gasket is sleeved to the rotating shaft and is positioned between the bearing and the shell. The wear-resistant gasket is in interference fit with the housing. The electric drive transmission device is characterized in that a wear-resistant gasket is arranged between the bearing and the shell, so that the bearing cannot contact with the shell, and the problem that the bearing wears the shell is solved; the wear-resistant gasket is in interference fit with the shell, and when the rotating shaft rotates, the wear-resistant gasket does not rotate, so that the problem that the wear-resistant gasket wears the shell is solved, and the shell is protected.

Description

Electric drive transmission

Technical Field

The present application relates to the field of electric drive transmissions, and in particular, to an electric drive transmission.

Background

With the development of new energy automobile industry, electric automobiles have become a development trend. The electric driving transmission device of the electric automobile comprises a motor and a reduction gearbox. The motor shaft of the motor is connected with the input shaft of the reduction gearbox to transmit power. Bearings are arranged on the motor shaft and the input shaft to ensure smoothness of the motor shaft and the input shaft during rotation. When the existing electric drive transmission device is used, the situation that a bearing wears a shell can occur, and the shell is possibly damaged.

Disclosure of Invention

The application provides an electrically driven transmission for a protective housing.

The embodiment of the application provides an electric drive transmission device, including casing, pivot, bearing and wear-resisting gasket, the pivot is located in the space that the casing encloses, the bearing equipment to the pivot, wear-resisting gasket cover establish to the pivot just is located the bearing with between the casing, wear-resisting gasket with casing interference fit.

Further, the shell comprises a first shell body, the first shell body comprises a first side wall and a first fixing portion extending from the first side wall, a first accommodating cavity is formed by the first side wall and the first fixing portion in a surrounding mode, the bearing is located in the first accommodating cavity and fixed to the first fixing portion, and the wear-resistant gasket is located between the bearing and the first side wall and in interference fit with the first fixing portion.

Further, the electric drive transmission comprises a motor, the rotating shaft comprises an input shaft and a motor shaft of the motor, the motor shaft comprises a first end, the first end is connected with the input shaft, the bearing comprises a first bearing, the first bearing is assembled to the input shaft, and the wear-resistant gasket is located between the first bearing and the shell.

Further, the casing includes first casing, second casing and third casing, third casing with the second casing is all fixed to first casing, the motor is located first casing with the space that the second casing encloses, the input shaft is located first casing with the space that the third casing encloses, first casing includes first lateral wall and from first fixed part that first lateral wall extends, first lateral wall with first fixed part encloses into first acceping the chamber, first bearing is located first acceping the intracavity and is fixed to first fixed part, wear pad is located first bearing with between the first lateral wall and with first fixed part interference fit.

Further, the bearing comprises a second bearing, the electrically driven transmission comprises a snap ring and a pressure plate, the motor shaft comprises a second end opposite to the first end, the second bearing is fixed to the second end, the second bearing is located between the snap ring and the pressure plate, the snap ring is fixed to the motor shaft and abuts against the second bearing, and the pressure plate is fixed to the second housing and abuts against the second bearing.

Further, the second housing includes a second side wall and a second fixing portion extending from the second side wall, the second side wall and the second fixing portion enclose a second accommodating cavity, the second bearing is located in the second accommodating cavity, and the pressing plate is fixed to the second fixing portion.

Further, the electrically driven transmission device includes a fixing member fixed to the second fixing portion to fix the pressing plate.

Further, the input shaft is provided with a receiving hole, the first end is assembled into the receiving hole, the electric drive transmission device comprises a gasket, the hardness of the gasket is smaller than that of the motor shaft and the input shaft, and the gasket is located between the first end and the input shaft.

Further, the wear pad is in the shape of a closed loop or in the shape of an unsealed loop.

Further, the wear pad is made of metal.

According to the electric drive transmission device, the wear-resistant gasket is arranged between the bearing and the shell, so that the bearing cannot be in contact with the shell, and the problem that the bearing wears the shell is solved; the wear-resistant gasket is in interference fit with the shell, and when the rotating shaft rotates, the wear-resistant gasket does not rotate, so that the problem that the wear-resistant gasket wears the shell is solved, and the shell is protected.

Drawings

FIG. 1 is a schematic cross-sectional view of an electric drive transmission of an exemplary embodiment of the present application, wherein only a portion of the electric drive transmission is shown;

FIG. 2 is an enlarged view of the circled portion at A of the cross-sectional schematic view shown in FIG. 1;

FIG. 3 is a schematic view of the wear pad shown in FIG. 2;

FIG. 4 is a schematic view of another embodiment of the wear pad shown in FIG. 3;

FIG. 5 is an enlarged view of the circled portion at B of the cross-sectional schematic view shown in FIG. 1;

fig. 6 is an enlarged view of the circled portion at C of the cross-sectional schematic view shown in fig. 1.

Reference numerals illustrate: a housing, 1; a first housing 11; a first sidewall 111; a through hole 1112; a first fixing portion 112; a first receiving cavity 1121; a first enclosure 113; a second housing 12; a first chamber 120; a second sidewall 121; a second fixing portion 122; a second receiving chamber 1221; a second enclosing wall 123; a third housing 13; a second chamber 130; a third sidewall 131; a third fixing portion 132; a third housing cavity 1321; a third surrounding wall 133; a wear-resistant pad 2; a motor 3; a motor shaft 31; a first end 311; a groove 3112; a second end 312; an input shaft 4; a housing hole 41; a first bearing 51; a second bearing 52; a third bearing 53; a clasp 6; a pressing plate 7; a fixing member 8; and a gasket 9.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with some aspects of the present application as detailed in the accompanying claims.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

The electric drive device of the embodiment of the application can be applied to vehicles and other required products.

Referring to fig. 1-2, the electric drive transmission comprises a housing 1, a spindle (not shown), bearings (not shown) and wear washers 2. The rotating shaft is positioned in a space surrounded by the shell 1. The bearing is assembled to the rotating shaft. The wear-resistant gasket 2 is sleeved to the rotating shaft and is positioned between the bearing and the shell 1. The wear-resistant gasket 2 is in interference fit with the housing 1.

The electric drive transmission device solves the problem that the bearing wears the shell 1 by arranging a wear-resistant gasket 2 between the bearing and the shell 1, wherein the bearing cannot be contacted with the shell 1; the wear-resistant gasket 2 is in interference fit with the shell 1, and when the rotating shaft rotates, the wear-resistant gasket 2 does not rotate, so that the problem that the wear-resistant gasket 2 wears the shell 1 is solved, and the shell 1 is protected; meanwhile, the noise problem caused by abrasion of the wear-resistant gasket 2 on the shell 1 is solved, and NVH performance is improved.

The wear-resistant pad 2 is made of a wear-resistant material, for example, metal. For example, the steel-iron alloy can be manufactured by stamping steel or iron, has the advantages of high strength, high temperature resistance, wear resistance, corrosion resistance and the like, and can work for a long time in a severe working environment.

As shown in fig. 3 to 4, the wear pad 2 is in the shape of a closed ring or in the shape of an unsealed ring. The non-closed ring-shaped wear pad 2 is less prone to wear of the housing 1.

Referring to fig. 1 to 2 and 5 to 6, the housing 1 includes a first housing 11. The first housing 11 includes a first side wall 111 and a first fixing portion 112 extending from the first side wall 111. The first side wall 111 and the first fixing portion 112 enclose a first accommodating cavity 1121. The bearing is located in the first receiving cavity 1121 and is fixed to the first fixing portion 112. The wear pad 2 is located between the bearing and the first sidewall 111 and is in interference fit with the first fixing portion 112.

The electric drive transmission comprises an electric motor 3. The rotating shaft comprises an input shaft 4 and a motor shaft 31 of the motor 3. The motor shaft 31 includes a first end 311. The first end 311 is connected to the input shaft 4. The bearings include a first bearing 51. The first bearing 51 is assembled to the input shaft 4. The wear pad 2 is located between the first bearing 51 and the housing 1.

The rotating shaft can also comprise an intermediate shaft and an output shaft. Bearings are arranged on the motor shaft, the input shaft 4, the intermediate shaft and the output shaft. The application does not limit the rotation shaft corresponding to the wear-resistant pad 2, and may be disposed between the corresponding bearing and the housing 1 according to actual needs.

The housing 1 includes a second housing 12 and a third housing 13. The third housing 13 and the second housing 12 are both fixed to the first housing 11. The motor 3 is located in a space enclosed by the first housing 11 and the second housing 12. The input shaft 4 is located in a space surrounded by the first housing 11 and the third housing 13. The first bearing 51 is located in the first receiving cavity 1121 and is fixed to the first fixing portion 112. The wear pad 2 is located between the first bearing 51 and the first sidewall 111 and is in interference fit with the first fixing portion 112.

The bearing includes a second bearing 52. The electric drive transmission device comprises a clamping ring 6 and a pressing plate 7. The motor shaft 31 includes a second end 312 opposite the first end 311. The second bearing 52 is fixed to the second end 312 to increase smoothness when the motor shaft 31 rotates. The second bearing 52 is located between the snap ring 6 and the pressure plate 7. The snap ring 6 is fixed to the motor shaft 31 and abuts against the second bearing 52. The pressing plate 7 is fixed to the second housing 12 and abuts against the second bearing 52.

The second bearing 52 is located between the snap ring 6 and the pressing plate 7, the snap ring 6 is fixed to the motor shaft 31 and abuts against the second bearing 52, and the pressing plate 7 is fixed to the second housing 12 and abuts against the second bearing 52 to prevent axial movement of the second bearing 52 to reduce noise and improve NVH performance.

The second housing 12 includes a second side wall 121 and a second fixing portion 122 extending from the second side wall 121. The second side wall 121 and the second fixing portion 122 enclose a second accommodating cavity 1221. The second bearing 52 is located within the second receiving cavity 1221. The pressing plate 7 is fixed to the second fixing portion 122.

The pressing plate 7 may be directly fixed to the second fixing portion 122, for example, may be welded to the second fixing portion 122. Optionally, the electrically driven transmission comprises a fixing member 8, the fixing member 8 being fixed to the second fixing portion 122 to fix the pressing plate 7. The fixing member 8 may be a screw or a bolt, etc.

The input shaft 4 is provided with a receiving hole 41. The first end 311 is assembled into the receiving hole 41. The electrically driven transmission comprises a washer 9, the hardness of the washer 9 being smaller than the hardness of the motor shaft 31 and the input shaft 4. The washer 9 is located between the first end 311 and the input shaft 4.

The washer 9 may eliminate a radial gap between the motor shaft 31 and the input shaft 4 to reduce noise caused by collision between the motor shaft 31 and the input shaft 4, thereby further improving NVH performance.

The gasket 9 is made of soft material, such as silica gel or rubber. The gasket 9 may be circular, square, or the like, and the shape of the gasket 9 is not limited in this application.

Alternatively, the washer 9 may be fixed to the motor shaft 31 so as not to be detachable.

Optionally, the gasket 9 is sleeved to the first end 311, and the gasket 9 is detachable to facilitate replacement of the gasket 9.

The first end 311 is provided with a recess 3112. The gasket 9 is assembled into the groove 3112 to increase the stability of the gasket 9.

Alternatively, the electric drive transmission includes a plurality of washers 9, and the washers 9 are arranged in order along the axial direction of the motor shaft 31.

The first housing 11 and the second housing 12 enclose a first chamber 120. The first housing 11 and the third housing 13 enclose a second chamber 130. The first side wall 111 is provided with a through hole 1112 communicating the first chamber 120 and the second chamber 130. The through hole 1112 is used for the motor shaft 31 or the input shaft 4 to pass through. The motor 3 is located within the first chamber 120. The input shaft 4 is located within the second chamber 130. The end of the input shaft 4 passes through the through hole 1112 and is located in the first chamber 120.

Optionally, the end of the input shaft 4 is located in the second chamber 130, and the first end 311 of the motor shaft 31 is assembled into the receiving hole 41 of the input shaft 4 after passing through the through hole 1112.

The bearing comprises a third bearing 53. The first bearing 51 and the third bearing 53 are fixed to opposite ends of the input shaft 4 to increase smoothness when the input shaft 4 rotates.

The electric drive transmission device only comprises three bearings, namely the first bearing 51, the second bearing 52 and the third bearing 53, so that the design of one bearing and the process of installing the bearing are reduced, meanwhile, the structure of the first shell 11 is simplified, the assembly efficiency is improved while the cost is reduced, the friction efficiency loss is also reduced, and the service life of the battery is prolonged.

The electric drive transmission is not limited to the provision of three bearings, and the number of bearings is not limited in this application.

Optionally, the wear pad 2 is arranged between the second bearing and the second housing.

Optionally, the wear pad 2 is arranged between the third bearing and the third housing.

The third housing 13 includes a third side wall 131 and a third fixing portion 132 extending from the third side wall 131. The third side wall 131 and the third fixing portion 132 enclose a third accommodating cavity 1321. The third bearing 53 is located in the third receiving cavity 1321 and is fixed to the third fixing portion 132.

The first housing 11 includes a first enclosure 113 extending from the first side wall 111. The second housing 12 includes a second enclosure 123 extending from the second side wall 121. The third housing 13 includes a third peripheral wall 133 extending from the third side wall 131. After the first housing 11 and the second housing 12 are assembled, the second enclosure 123 abuts against the first sidewall 111. After the first housing 11 and the third housing 13 are assembled, the first enclosing wall 113 abuts against the third enclosing wall 133.

The electric drive transmission transmits power to the input shaft 4 through the motor shaft 31, and finally the power is transmitted to wheels of the vehicle.

The foregoing description is only a preferred embodiment of the present application, and is not intended to limit the utility model to the particular embodiment disclosed, but is not intended to limit the utility model to the particular embodiment disclosed, as any and all modifications, equivalent to the above-described embodiment, may be made by one skilled in the art without departing from the scope of the utility model.

Claims (10)

1. The utility model provides an electric drive transmission, its characterized in that includes casing, pivot, bearing and wear-resisting gasket, the pivot is located the space that the casing encloses, the bearing equipment to the pivot, wear-resisting gasket cover establish to the pivot just is located between bearing and the casing, wear-resisting gasket with casing interference fit.

2. The electrically driven transmission of claim 1, wherein the housing comprises a first housing including a first side wall and a first securing portion extending from the first side wall, the first side wall and the first securing portion defining a first receiving cavity, the bearing being positioned within the first receiving cavity and secured to the first securing portion, the wear pad being positioned between the bearing and the first side wall and in interference fit with the first securing portion.

3. The electric drive transmission of claim 1, comprising a motor, the shaft comprising an input shaft and a motor shaft of the motor, the motor shaft comprising a first end, the first end being connected to the input shaft, the bearing comprising a first bearing assembled to the input shaft, the wear pad being located between the first bearing and the housing.

4. An electrically driven transmission according to claim 3 wherein the housing comprises a first housing, a second housing and a third housing, the third housing and the second housing each being secured to the first housing, the motor being located in a space defined by the first housing and the second housing, the input shaft being located in a space defined by the first housing and the third housing, the first housing comprising a first side wall and a first securing portion extending from the first side wall, the first side wall and the first securing portion defining a first receiving cavity, the first bearing being located in the first receiving cavity and secured to the first securing portion, the wear pad being located between the first bearing and the first side wall and in interference fit with the first securing portion.

5. The electrically driven transmission of claim 4, wherein the bearing comprises a second bearing comprising a snap ring and a pressure plate, the motor shaft comprising a second end opposite the first end, the second bearing secured to the second end, the second bearing positioned between the snap ring and the pressure plate, the snap ring secured to the motor shaft and held against the second bearing, and the pressure plate secured to the second housing and held against the second bearing.

6. The electrically driven transmission of claim 5, wherein the second housing includes a second side wall and a second securing portion extending from the second side wall, the second side wall and the second securing portion enclosing a second receiving cavity, the second bearing being located within the second receiving cavity, the platen being secured to the second securing portion.

7. The electric drive transmission of claim 6, comprising a securing member secured to the second securing portion to secure the platen.

8. An electrically driven transmission as claimed in claim 3 wherein the input shaft is provided with a receiving bore into which the first end is assembled, the electrically driven transmission including a washer having a hardness less than the hardness of the motor shaft and the input shaft, the washer being located between the first end and the input shaft.

9. An electrically driven transmission according to any one of claims 1 to 8, wherein the wear pad is in the form of a closed loop or in the form of an unsealed loop.

10. An electrically driven transmission according to any one of claims 1 to 8, wherein the wear pad is made of metal.