CN105221684B - Electric vehicle folk art term speed changer - Google Patents

Abstract

The present invention provides a front-rear drive dual-speed transmission for an electric vehicle, comprising: a transmission housing; a drive motor; a flexible disc; an input shaft; a first driving gear; a second driving gear; an output shaft; a first driven gear; Two driven gears; the first clutch and the second clutch, the first clutch is connected with the first driven gear and is located outside the first driven gear, the second clutch is connected with the second driving gear and is located outside the second driving gear ; output flange; and hydraulic control system. According to the front-rear-drive double-speed transmission of the electric vehicle of the present invention, it is suitable for the arrangement form of the front-rear drive. According to the front-rear drive dual-speed transmission of the electric vehicle of the present invention, the first clutch and the second clutch are respectively arranged on both sides of the front-rear drive dual-speed transmission of the electric vehicle, which facilitates the disassembly of the first clutch and the second clutch and facilitates easy Replacement of damaged parts.

Description

Dual-range transmission for electric vehicles

technical field

The present invention relates to the technical field of automobiles, in particular to an electric vehicle dual-speed transmission.

Background technique

In the related art, the automatic transmission used in the electric vehicle has a complex structure and a large volume, which takes up a large space on the vehicle body. Due to the large volume of the automatic transmission, the transmission route is long and inefficient during power transmission, which affects the The quality of electric vehicles. In addition, due to the limitation of the structure of the automatic transmission, the hydraulic system corresponding to the automatic transmission, especially the oil circuit layout of the hydraulic system is also very complicated, which increases the manufacturing cost. And, limited by the structure of the automatic transmission itself, it is very inconvenient to install and disassemble the clutch arranged in the automatic transmission, and it is inconvenient to replace it when it is worn for a long time.

Contents of the invention

The present invention aims to solve one of the above-mentioned technical problems in the prior art at least to a certain extent. In view of this, the present invention needs to provide an electric vehicle double-speed transmission with high efficiency, simple structure and convenient disassembly and assembly of the clutch.

The dual-speed transmission for an electric vehicle according to an embodiment of the present invention includes: a transmission housing; a drive motor connected to the transmission housing; a flexible disc connected to a motor of the drive motor through a spline Shaft connection; input shaft, the input shaft is connected with the flexible disk through a spline; the first driving gear, the first driving gear is sleeved on the input shaft and positioned on the input shaft through the first flat key On the shaft, the first driving gear is located on one side close to the flexible disk; the second driving gear is sleeved on the input shaft and positioned on the other side of the input shaft; the output Shaft, the output shaft is parallel to the input shaft and arranged at intervals; the first driven gear, the first driven gear is idly sleeved on the output shaft and meshed with the first driving gear; the second Driven gear, the second driven gear meshes with the second driving gear, the second driven gear is sleeved on the first spline and the output shaft, and is connected to the first spline through the first spline The output shaft is connected; the first clutch and the second clutch, the first clutch is connected with the first driven gear and is located outside the first driven gear, the second clutch is connected with the second driving gear Connected and located outside the second driving gear; output flange, the output flange is sleeved on the end of the output shaft, and an output flange is provided between the output flange and the outer peripheral wall of the output shaft spline, one end of the output flange is against the output shaft through a limit circlip, and the other end is fastened to the output shaft by a captive screw tightened on the flange pressure plate; and the hydraulic control system, the The hydraulic control system is respectively connected with the first clutch and the second clutch.

According to the electric vehicle dual-speed transmission of the embodiment of the present invention, the first clutch and the second clutch are respectively arranged on both sides of the electric vehicle dual-speed transmission, which facilitates the disassembly of the first clutch and the second clutch and facilitates the replacement of wearing parts.

In addition, the electric vehicle dual-speed transmission according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the first clutch includes: a clutch hub, a first annular sealing ring sequentially arranged inside the clutch hub, a clutch piston, a clutch return spring, a return spring retaining ring, and an internal friction sheet, outer steel sheet, outer steel sheet circlip, the clutch hub is formed with a clutch oil inlet passage, and the clutch piston is provided with a second annular seal ring and a cooling oil passage.

According to an embodiment of the present invention, it further includes a connecting spline, and the connecting spline is connected between the first driven gear and the first clutch.

According to an embodiment of the present invention, the outer steel plate is matched with the spline of the clutch hub, and the inner friction plate is matched with the spline of the connecting spline, wherein the clutch hub is connected with the output shaft through the second sliding flat key .

According to an embodiment of the present invention, the second clutch has the same structure and size as the first clutch, and the second driving gear is provided with a second driving gear extension near the side of the second clutch. The second driving gear extension is connected with the second clutch.

According to an embodiment of the present invention, the inner friction plates of the second clutch are matched with the splines of the outer extension of the second driving gear, and the clutch hub is connected with the input shaft through the first sliding flat key.

According to an embodiment of the present invention, the hydraulic control system includes: an oil inlet part of the hydraulic assembly, an oil pump connected to the oil inlet part of the hydraulic assembly, and a first clutch solenoid valve supplying oil to the first clutch, for Second clutch solenoid for oil supply to the second clutch.

According to an embodiment of the present invention, the clutch oil supply passage is arranged on the inner side wall of the transmission housing, and the two sides of the clutch oil supply passage are provided with the first clutch and the second clutch. Clutch rotating seal against which the clutch is tightly fitted.

According to an embodiment of the present invention, a first clutch cover corresponding to the first clutch and a second clutch cover corresponding to the second clutch are respectively provided on the transmission case.

According to an embodiment of the present invention, it further includes a motor connection case, the motor connection case is connected between the driving motor and the transmission case.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

FIG. 1 is a schematic structural diagram of a dual-speed transmission for an electric vehicle according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a first clutch of a dual-speed transmission for an electric vehicle according to an embodiment of the present invention.

3 is a side view of a first clutch of an electric vehicle dual-speed transmission according to an embodiment of the present invention.

Fig. 4 is a schematic three-dimensional structure diagram of a hydraulic control system of a dual-speed transmission for an electric vehicle according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

As shown in FIG. 1 , an electric vehicle dual-speed transmission 100 according to an embodiment of the present invention includes: a transmission housing 5 , a drive motor 1 , a flexible disc 3 , an input shaft 7 , a first driving gear 6 , and a second driving gear 8 , output shaft 16, first driven gear 19, second driven gear 14, first clutch 23, second clutch 12, output flange 27 and hydraulic control system 200.

Specifically, the drive motor 1 is connected to the transmission case 5, and the drive motor 1 can be arranged outside the transmission case 5, and can further include a motor connection case 2, which is connected between the drive motor 1 and the transmission case 5. Between, to facilitate the installation of the drive motor 1.

The flexible disk 3 is connected with the motor shaft of the driving motor 1 through a spline. The input shaft 7 is connected with the flexible disk 3 through splines. In other words, the motor 1 transmits power to the flexible disk 3 through splines, and the flexible disk 3 transmits power to the input shaft 7 through splines.

The first driving gear 6 is sleeved on the input shaft 7 and positioned on the input shaft 7 by the first flat key 4. The first driving gear 6 is located on the side adjacent to the flexible disc 3. In other words, the first driving gear 6 Located on the side adjacent to the drive motor 1.

The second driving gear 8 is idly sleeved on the input shaft 7 and positioned on the other side of the input shaft 7 . For example, a shaft shoulder can be provided on the input shaft 7, and one end of the second driving gear 8 can abut against the shaft shoulder, and the other end can abut against the second clutch 12, thus, the axial direction of the second driving gear 8 can be adjusted. to locate. The output shaft 16 is arranged parallel to and spaced apart from the input shaft 7 .

The first driven gear 19 is loosely sleeved on the output shaft 16 and meshes with the first driving gear 6. For example, the output shaft 16 is also provided with a shaft shoulder, and one end of the first driven gear 19 can be offset against the first clutch 23, The other end abuts against the shaft shoulder, whereby the axial direction of the first driven gear 19 can be positioned. The second driven gear 14 meshes with the second driving gear. The second driven gear 14 is sheathed on the first spline 17 and the output shaft 16 , and is connected to the output shaft 16 through the first spline 17 . The output flange 27 is sleeved on the end of the output shaft 16, an output spline 26 is provided between the output flange 27 and the outer peripheral wall of the output shaft 16, and one end of the output flange 27 passes through a limit retaining spring 30 Against the output shaft 16 , the other end is fastened on the output shaft 16 through a captive screw 29 screwed on the flange pressure plate 28 . It can be understood that a flange dustproof cover 25 can be provided between the output flange 27 and the transmission housing 5 to prevent dust.

The first clutch 23 is connected with the first driven gear 19 and located outside the first driven gear 19 , and the second clutch 12 is connected with the second driving gear 8 and located outside the second driving gear 8 . It should be noted that the first clutch 23 can perform power transmission with the output shaft 16 through the second sliding flat key 22 , and the second clutch 12 can perform power transmission with the input shaft 7 through the first sliding flat key 11 . The hydraulic control system 200 is respectively connected to the first clutch 23 and the second clutch 12 to control the first clutch 23 and the second clutch 12 respectively. In other words, the hydraulic control system 200 controls the engagement and disengagement of the first clutch 23 and the second clutch 12 .

According to the electric vehicle dual-speed transmission 100 of the embodiment of the present invention, the first clutch 23 and the second clutch 12 are respectively arranged on both sides of the electric vehicle dual-speed transmission 100, which is convenient for the disassembly of the first clutch 23 and the second clutch 12, which is beneficial to Replacement of wearing parts (friction plates). Moreover, only two pairs of gears and one clutch are passed through each gear, and the transmission path is simple, so the transmission has a simple structure and high transmission efficiency.

According to the electric vehicle dual-speed transmission 100 of the present invention, it is suitable for the arrangement form of front and rear drive.

As shown in Fig. 2 and Fig. 3, according to one embodiment of the present invention, the first clutch 23 includes: a clutch hub 35, a first annular sealing ring 37 arranged inside the clutch hub 35, a clutch piston 39, and a clutch return spring 40. Return spring circlip 41, inner friction plate 43, outer steel plate 44, outer steel plate circlip 45, clutch hub 35 is formed with clutch oil inlet passage 36, and clutch piston 39 is provided with a second annular seal Ring 42 and cooling oil passage 38. Wherein the clutch piston 39 cooperates with the clutch hub 35 to form the pressure chamber of the clutch, the first annular seal ring 37 and the second annular seal ring 42 prevent oil leakage when the clutch piston 39 moves, and when the oil pressure decreases, the clutch return spring 40 makes The piston returns to the initial position, wherein the outer steel sheet retainer 45 limits the displacement of the friction plate set, and wherein the return spring retainer 41 limits the displacement of the return spring.

According to an embodiment of the present invention, the electric vehicle dual-speed transmission 100 further includes a connecting spline 20 connected between the first driven gear 19 and the first clutch 23 .

Further, according to one embodiment of the present invention, the outer steel disc 44 is matched with the spline of the clutch hub 35, and the inner friction plate 43 is matched with the spline of the connecting spline 20, wherein the clutch hub 35 passes through the second sliding flat key 22 Connected to the output shaft 16. Thereby, the reliability of the first clutch 23 can be improved, and the working efficiency can be improved.

According to an embodiment of the present invention, the structure and size of the second clutch 23 and the first clutch 12 are the same. The purpose of the structure and size of the first clutch 23 and the second clutch 12 is to facilitate the processing and replacement of parts. The side of the second driving gear 8 adjacent to the second clutch 12 is provided with a second driving gear extension 9 , and the second driving gear extension 9 is connected to the second clutch 12 . Thereby, the reliability of the second clutch 12 can be improved. Further, according to an embodiment of the present invention, the inner friction plate 43 of the second clutch 12 is matched with the spline of the second driving gear extension 9 , and the clutch hub 35 is connected with the input shaft 7 through the first sliding flat key 11 .

It should be noted that the electric vehicle dual-speed transmission according to the embodiment of the present invention is divided into two gears:

First gear: the second clutch 12 works, the motor 1 transmits power to the flexible disc 3 through the spline, the flexible disc 3 transmits the power to the input shaft 7 through the spline, and then transmits the power to the second clutch 12 through the first sliding flat key 11 , the second clutch 12 transmits the power to the second driving gear extension 9, and the second driving gear 8 transmits the power to the second driven gear 14, and the second driven gear 14 outputs through the output flange 27.

In the second gear: the first clutch 23 works, the power is transmitted from the input shaft 7 to the first driving gear 6 via the flat key 4, the first driving gear 6 is transmitted to the first driven gear 19, and the first driven gear 19 is transmitted to the first driven gear 19 through the connecting flower. The key 20 transmits the power to the first clutch 23, and the first clutch 23 transmits the power to the output shaft 16 via the second sliding flat key 22, and the output shaft 16 transmits the power to the output flange 27 through the output spline 26 for output.

According to the dual-speed transmission 100 for electric vehicles of the present invention, each gear is transmitted through only two pairs of gears and one clutch, and the transmission path is simple. Therefore, the transmission has a simple structure and high transmission efficiency.

As shown in FIG. 4 , according to an embodiment of the present invention, the hydraulic control system 200 includes: an oil inlet portion 70 of the hydraulic assembly, an oil pump 74 connected to the oil inlet portion 70 of the hydraulic assembly, and an oil supply for the first clutch 23 The first clutch solenoid valve 77 supplies oil to the second clutch 12 and the second clutch solenoid valve 78 . It can be understood that the hydraulic control system 200 may include: the oil inlet part 70 of the hydraulic assembly, the coarse filter 71, the valve plate 72, the oil pump motor 73, the oil pump 74, the first clutch pressure sensor 75, the second clutch pressure sensor 76, the first A clutch solenoid valve 77, a second clutch solenoid valve 78, a TCU wiring harness 79, a TCU 80, an overflow valve 81, a main oil pressure sensor 82, a fine filter 83, an accumulator 84, and a second clutch cover 24. Wherein, the first clutch solenoid valve 77 supplies oil to the first clutch 23 , and the second clutch solenoid valve 78 supplies oil to the second clutch 12 . The first clutch solenoid valve 77 can be a normally closed solenoid valve, and the second clutch solenoid valve 78 can be a normally open solenoid valve. When the TCU fails, the normally open solenoid valve 43 will supply oil to the second clutch 12, so that the vehicle can Drive in first gear.

As shown in Figure 1, according to an embodiment of the present invention, the clutch oil supply oil passage 10 is arranged on the inner side wall of the transmission housing 5, and the two sides of the clutch oil supply oil passage 10 are provided with the first clutch 23 and the second clutch 23. The clutch rotating seal ring 13 against which the clutch 12 clings. In other words, the first clutch 23 and the second clutch 12 are adjacent to the transmission housing 5, and the clutch oil supply oil passage 10 is arranged on the transmission housing 5. At the same time, the transmission housing 5 is provided with a rotating sealing ring 13, which can prevent oil liquid leakage. Further, the clutch oil inlet passage 36 is arranged on the clutch hub 35. When the first clutch 23 or the second clutch 12 is working, the hydraulic oil enters the casing and the rotating sealing ring 13 and the rotating seal ring 13 through the clutch oil supply passage 10 on the casing. The sealed cavity formed by the clutch hub 35 enters the pressure chamber formed by the piston of the clutch and the clutch hub 35 through the oil inlet oil passage 36 on the clutch hub 35 .

As shown in FIG. 1 , according to an embodiment of the present invention, a first clutch cover 21 corresponding to the first clutch 23 and a second clutch cover 24 corresponding to the second clutch 12 are respectively provided on the transmission housing 5 . Thus, after the first clutch cover 21 and the second clutch cover 24 are disassembled, the first clutch 23 and the second clutch 12 can be taken out directly, which facilitates the replacement of wearing parts of the clutches.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (9)

1. A two-speed transmission for an electric vehicle, characterized in that it comprises: Transmission housing (5); A drive motor (1), the drive motor (1) is connected to the transmission case (5); A flexible disk (3), the flexible disk (3) is connected to the motor shaft of the driving motor (1) through a spline; An input shaft (7), the input shaft (7) is connected to the flexible disc (3) through a spline; The first driving gear (6), the first driving gear (6) is sleeved on the input shaft (7) and positioned on the input shaft (7) through the first flat key (4), the The first driving gear (6) is located on the side adjacent to the flexible disc (3); The second driving gear (8), the second driving gear (8) is sleeved on the input shaft (7) and positioned on the other side of the input shaft (7); an output shaft (16), the output shaft (16) is arranged parallel to and spaced apart from the input shaft (7); A first driven gear (19), the first driven gear (19) is loosely sleeved on the output shaft (16) and meshed with the first driving gear (6); The second driven gear (14), the second driven gear (14) meshes with the second driving gear, and the second driven gear (14) is sleeved between the first spline (17) and the on the output shaft (16) and connected with the output shaft (16) through the first spline (17); The first clutch (23) and the second clutch (12), the first clutch (23) is connected with the first driven gear (19) and located outside the first driven gear (19), so The second clutch (12) is connected to the second driving gear (8) and located outside the second driving gear (8); An output flange (27), the output flange (27) is sleeved on the end of the output shaft (16), between the output flange (27) and the outer peripheral wall of the output shaft (16) An output spline (26) is provided, one end of the output flange (27) is opposed to the output shaft (16) through a limit circlip (30), and the other end is tightened on the flange pressure plate (28) The captive screw (29) is fastened on said output shaft (16); and A hydraulic control system (200), the hydraulic control system (200) is connected to the first clutch (23) and the second clutch (12) respectively; The first clutch (23) includes: a clutch hub (35), a first annular sealing ring (37) arranged inside the clutch hub (35), a clutch piston (39), and a clutch return spring (40) , return spring circlip (41), and inner friction plate (43), outer steel plate (44), outer steel plate circlip (45), the clutch hub (35) is formed with a clutch oil inlet passage ( 36), the clutch piston (39) is provided with a second annular sealing ring (42) and a cooling oil passage (38). 2. The electric vehicle dual-speed transmission according to claim 1, characterized in that it further comprises a connecting spline (20), the connecting spline (20) is connected between the first driven gear (19) and the between the first clutch (23). 3. The electric vehicle dual-speed transmission according to claim 2, characterized in that, the outer steel plate (44) is matched with the spline of the clutch hub (35), and the inner friction plate (43) is connected with A spline fit of the splines (20) where the clutch hub (35) is connected to the output shaft (16) via the second sliding flat key (22). 4. The electric vehicle dual-speed transmission according to claim 1, characterized in that, the structure and size of the second clutch (12) and the first clutch (23) are the same, and the second driving gear (8 ) is provided with a second drive gear extension (9) adjacent to the second clutch (12), and the second drive gear extension (9) is connected to the second clutch (12). 5. The electric vehicle dual-speed transmission according to claim 4, characterized in that, the inner friction plate (43) of the second clutch (12) cooperates with the spline of the second driving gear extension (9), and the clutch The hub (35) is connected with the input shaft (7) through the first sliding flat key (11). 6. The electric vehicle dual-speed transmission according to claim 1, characterized in that, the hydraulic control system (200) comprises: a hydraulic assembly oil inlet part (70), which is connected to the hydraulic assembly oil inlet part (70) ) connected to the oil pump (74), and the first clutch solenoid valve (77) supplying oil to the first clutch (23), and the second clutch solenoid valve (78) supplying oil to the second clutch (12). 7. The electric vehicle dual-speed transmission according to claim 1, characterized in that, the clutch oil supply passage (10) is arranged on the inner side wall of the transmission housing (5), and the clutch oil supply passage ( 10) The clutch rotating sealing rings (13) that are in close contact with the first clutch (23) and the second clutch (12) are provided on both sides. 8. The electric vehicle dual-speed transmission according to claim 1, characterized in that, the transmission housing (5) is respectively provided with a first clutch cover (21) and a first clutch cover (21) corresponding to the first clutch (23). A second clutch cover (24) corresponding to the second clutch (12). 9. The electric vehicle dual-speed transmission according to claim 1, characterized in that it further comprises a motor connection case (2), the motor connection case (2) is connected between the drive motor (1) and the transmission case body (5).