Rear axle and vehicle with same

Abstract

The utility model provides a rear axle and a vehicle with the rear axle, and belongs to the technical field of electric vehicles. The rear axle comprises an axle housing, a housing assembly, a speed reducer, a driving motor, a controller and a positioning assembly; the shell assembly comprises a first shell fixedly connected to the axle shell and a second shell connected to the first shell, the speed reducer is installed in the first shell, the driving motor is installed in the second shell, and the driving end of the driving motor penetrates through the second shell to be connected to the speed reducer; the controller is connected to the side, away from the speed reducer, of the second shell. The positioning assembly comprises a first positioning piece connected to the first shell and a second positioning piece connected to the second shell. The arrangement space of the lower vehicle body can be optimized, the positioning accuracy of the driving motor is improved, and more batteries can be conveniently arranged in the space of the lower vehicle body.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric vehicle technical field, especially a rear axle and vehicle with it. BACKGROUND

[0002] The existing electric drive rear axle is generally composed of a bearing axle housing, a drive half shaft and a reducer assembly, and a motor controller and a drive motor assembly are independent systems. The motor controller is arranged on the vehicle body and connected to the drive motor through three-phase lines, and the drive motor and the drive rear axle are positioned through positioning pins or positioning notches and fastened by bolts. The number of parts is large, the space of the lower vehicle body is occupied, and the positioning accuracy is not high. With the demand for improving the endurance mileage and overall performance of pure electric vehicles, more battery space needs to be arranged on the lower vehicle body to improve the endurance mileage of the vehicle, and the positioning accuracy of the drive motor and the drive rear axle needs to be improved to improve the NVH performance of the vehicle. SUMMARY

[0003] The first technical problem to be solved by the utility model is to provide a rear axle that can solve the problems of many parts, large vehicle body space occupation and low positioning accuracy in the prior art, optimize the layout space of the lower vehicle body, facilitate the arrangement of more batteries in the lower vehicle body space, improve the endurance mileage of the vehicle, improve the positioning accuracy of the drive motor, and improve the NVH performance of the vehicle.

[0004] The second technical problem to be solved by the utility model is to provide a vehicle applying the rear axle.

[0005] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is as follows: a rear axle, comprising:

[0006] an axle housing;

[0007] a housing assembly comprising a first housing and a second housing, the first housing being fixed to the axle housing, and the second housing being connected to the side of the first housing away from the axle housing;

[0008] a reducer installed inside the first housing;

[0009] a drive motor installed inside the second housing, with its driving end connected to the reducer through the second housing;

[0010] a controller connected to the side of the second housing away from the reducer;

[0011] a positioning assembly comprising a first positioning member and a second positioning member, the first positioning member being connected to the side of the first housing close to the second housing, and the second positioning member being connected to the second housing at a position corresponding to the first positioning member.

[0012] According to an embodiment of the utility model, wherein, the first positioning piece includes the first positioning hole of first shell is equipped with, the second positioning piece includes the positioning cylinder, the positioning cylinder is connected to the second shell corresponding to the first positioning hole place;

[0013] Wherein, the speed reducer includes corresponding to the first rotating shaft of drive motor, the first rotating shaft inserts and rotates the connection in the first positioning hole, the drive end of drive motor passes through the positioning cylinder and is connected to the first rotating shaft.

[0014] According to an embodiment of the utility model, wherein, the first rotating shaft is connected with oil seal near the side of drive motor, the first rotating shaft and the oil seal insert the positioning cylinder, the oil seal and the inner wall of the positioning cylinder are sealedly connected.

[0015] According to an embodiment of the utility model, wherein, the first shell is located above the first rotating shaft and is connected with the oil collecting groove extending along the axial direction of the first rotating shaft, the first shell is equipped with the oil guide groove along the lip outer periphery of the oil seal near the side of the oil seal, the oil guide groove is connected to the oil collecting groove, to guide the lubricating oil in the first shell to the oil seal.

[0016] According to an embodiment of the utility model, wherein, the speed reducer further includes:

[0017] The first gear is connected to the first rotating shaft;

[0018] Two first bearings are respectively connected to the two ends of the first rotating shaft, one of the first bearings is located between the first gear and the oil seal and is fixedly connected to the first positioning hole, and the other first bearing is fixedly connected to the side of the first shell away from the second shell.

[0019] According to an embodiment of the utility model, wherein, the top of the first shell is connected with an L-shaped plate, the L-shaped plate is connected to the first shell and forms the oil collecting groove with the first shell.

[0020] According to an embodiment of the utility model, wherein, the L-shaped plate is further connected with an inclined plate above the two first bearings, the inclined plate is connected to the L-shaped plate and is inclined to the direction of the first gear.

[0021] According to an embodiment of the utility model, wherein, the first shell includes a first shell body and a mounting cover, the first shell body is equipped with a first opening on the side away from the second shell, the first opening is connected with the mounting cover, the mounting cover can be covered on the first opening and forms a mounting cavity for mounting the speed reducer with the first shell.

[0022] According to an embodiment of the present application, the inner side of the mounting cover is provided with a first positioning groove corresponding to the first positioning hole, and the two ends of the first rotating shaft are respectively inserted into the first positioning hole and the first positioning groove.

[0023] The present application solves the first technical problem by providing a vehicle, wherein the vehicle comprises the rear axle according to any one of the first aspect.

[0024] Compared with the prior art, the present application has the following advantages or beneficial effects:

[0025] The present application integrates the reducer, the driving motor and the controller into the axle housing, solves the problems of many parts and large space occupation in the prior art, optimizes the layout space of the lower vehicle body, and can arrange more batteries in the layout space of the lower vehicle body, thereby improving the vehicle mileage. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0027] Figure 1 is a schematic view of a rear axle according to an example embodiment.

[0028] Figure 2 is a connection schematic view of a housing assembly and a reducer according to an example embodiment.

[0029] Figure 3 is a partial sectional view of a housing assembly and a reducer according to an example embodiment.

[0030] Figure 4 is a schematic view of a reducer according to an example embodiment.

[0031] Figure 5 is a connection schematic view of a housing assembly and a driving motor according to an example embodiment.

[0032] Figure 6 is a partial sectional view of a housing assembly according to an example embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0034] 1, axle housing; 11, rear axle cover; 12, sleeve;

[0035] 2, housing assembly; 21, first housing; 210, first housing body; 2101, first opening; 211, oil collecting groove; 2111, L-shaped plate; 2112, inclined plate; 212, oil guiding groove; 213, mounting cover; 22, second housing;

[0036] 3, speed reducer; 31, first rotating shaft; 32, first gear; 33, first bearing; 34, second gear assembly; 35, third gear;

[0037] 4, driving motor;

[0038] 5, controller;

[0039] 6, positioning assembly; 61, first positioning member; 611, first positioning hole; 612, first positioning groove; 613, second positioning groove; 614, third positioning groove; 62, second positioning member; 621, positioning cylinder; 622, step

[0040] 7, oil seal;

[0041] 8, differential. DETAILED DESCRIPTION

[0042] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and description of the same will be omitted.

[0043] The terms "one", "a", "the", and "said" are used to denote one or more of the elements specified; the terms "comprising" and "having" are used to denote an open-ended inclusion of one or more elements of any listed step or combination of steps with additional steps or combinations of steps being possible; and the term "about" is used to denote an approximation within a range of 10% of a value.

[0044] The utility model embodiment provides a rear axle, such as Figures 1-5As shown, the rear axle comprises an axle housing 1, a housing assembly 2, a reducer 3, a drive motor 4, a controller 5 and a positioning assembly 6, the housing assembly 2 comprises a first housing 21 and a second housing 22, the first housing 21 is fixedly connected to the axle housing 1, the second housing 22 is connected to the side of the first housing 21 away from the axle housing 1, and the reducer 3 is installed in the interior of the first housing 21; the drive motor 4 is installed in the interior of the second housing 22, and the driving end thereof penetrates through the second housing 22 and the first housing 21 to be connected to the reducer 3 to drive the reducer 3 to move; the controller 5 is connected to the side of the second housing 22 away from the reducer 3, and the positioning assembly 6 comprises a first positioning member 61 and a second positioning member 62, the first positioning member 61 is connected to the side of the first housing 21 close to the second housing 22, and the second positioning member 62 is connected to the second housing 22 at a position corresponding to the first positioning member 61, and through cooperation of the first positioning member 61 and the second positioning member 62, the drive motor 4 and the reducer 3 are limited and aligned. In the present application, the first housing 21 and the second housing 22 are integrally formed, the reducer 3 and the drive motor 4 are respectively installed in the interiors of the first housing 21 and the second housing 22, the controller 5 is connected to the side of the second housing 22 away from the first housing 21, and the first housing 21 is connected to the axle housing 1, so that the reducer 3, the drive motor 4 and the controller 5 are integrated into the axle housing 1 in one, thereby solving the problems of many parts and large space occupation in the prior art, optimizing the layout space of the lower vehicle body, and arranging more batteries in the layout space of the lower vehicle body to improve the cruising range of the automobile. In addition, the first positioning member 61 and the second positioning member 62 are respectively arranged at the connection positions of the first housing 21 and the second housing 22, so as to improve the positioning accuracy of the drive motor 4, facilitate quick alignment and connection of the driving shaft of the drive motor 4 and the first rotating shaft 31 of the reducer 3, and solve the problem of different shafts and abnormal sound of the drive system caused by low positioning accuracy of the drive motor 4, thereby improving the NVH performance of the whole vehicle.

[0045] Preferably, the inner periphery of the second housing 22 and the main body of the drive motor 4 are in clearance fit, which not only limits and fixes the drive motor 4, but also guides the drive motor 4, so that the driving end of the drive motor 4 is connected to the second positioning member 62 and then connected to the reducer 3 under the guidance of the second positioning member 62, the drive motor 4 is quickly installed and accurately positioned, and the efficiency of vehicle body assembly is improved.

[0046] Preferably, as shown in the drawings, Figure 1 The axle housing 1 comprises an axle package 11 at the middle part and sleeve pipes 12 connected to both sides of the axle package 11. As shown in the drawings, Figure 1 The axle package 11 and the two sleeve pipes 12 are three-section tailor-welded axles, the upper and lower sheets of the axle package 11 are connected by punch welding, and the axle package 11 can be applied to a micro vehicle. The specification of the sleeve pipe 12 can be φ60*4mm, the wall thickness of the middle axle package can be 4mm, and the height of the axle package can be 212mm.

[0047] In a preferred embodiment of the present application, as shown in Figures 4-5 The first positioning member 61 includes a first positioning hole 611 formed in the first housing 21, and the second positioning member 62 includes a positioning cylinder 621 connected to the second housing 22 corresponding to the first positioning hole 611. The reducer 3 includes a first rotating shaft 31 corresponding to the driving motor 4, which is inserted into and rotatably connected to the first positioning hole 611. The driving end of the driving motor 4 passes through the positioning cylinder 621 and is connected to the first rotating shaft 31. In this embodiment, the first rotating shaft 31 of the reducer 3 is connected to the driving end of the driving motor 4 after being inserted into the first positioning hole 611. The first positioning hole 611 defines the installation position of the first rotating shaft 31, and the positioning cylinder 621 can guide and position the driving end of the driving motor 4. Specifically, a third bearing is fixed on the positioning cylinder 621, the driving end of the driving motor 4 passes through and is connected to the third bearing, and the driving end of the driving motor 4 is guided and rotated relative to the positioning cylinder 621 through the third bearing.

[0048] In a preferred embodiment of the present application, as shown in Figures 4-5 The first rotating shaft 31 is connected to the oil seal 7 on the side close to the driving motor 4, the first rotating shaft 31 and the oil seal 7 are inserted into the positioning cylinder 621, and the oil seal 7 is sealingly connected to the inner wall of the positioning cylinder 621. In this embodiment, the end of the positioning cylinder 621 close to the first housing 21 is recessed inward to form an annular step 622 for cooperating with the outer periphery of the oil seal 7. The annular step 622 is in interference fit with the oil seal 7, and the oil seal lip is directed towards the reducer 3, preventing the lubricating oil in the first housing 21 from entering the second housing 22, improving the lubrication reliability of the reducer 3, and prolonging the service life of the oil seal 7.

[0049] In a preferred embodiment of the present application, as shown in Figures 4-5 The first housing 21 is connected to an oil collecting groove 211 extending along the axial direction of the first rotating shaft 31 above the first rotating shaft 31. The first housing 21 is provided with an oil guiding groove 212 distributed along the outer periphery of the oil seal 7 on the side close to the oil seal 7. The oil guiding groove 212 is connected to the oil collecting groove 211 to guide the lubricating oil in the first housing 21 to the oil seal 7. In this embodiment, the oil collecting groove 211 is arranged inside and above the first housing 21, and the oil guiding groove 212 is formed on the side of the first housing 21 close to the oil seal 7. The oil guiding groove 212 is arranged around the outer periphery of the oil seal lip. This design can collect part of the lubricating oil splashed above the first housing 21 and guide the lubricating oil to the oil seal lip, improving the cooling efficiency and reducing the risk of oil seal 7 failure.

[0050] In a preferred embodiment of the present application, as shown in Figures 4-5The shown speed reducer 3 further comprises a first gear assembly and a second gear assembly 34, the first gear assembly comprises a first rotating shaft 31, a first gear 32 fixedly connected to the first rotating shaft 31 and engaged with the second gear assembly 34, and two first bearings 33 respectively connected to two ends of the first rotating shaft 31, one of the two first bearings 33 is located between the first gear 32 and the oil seal 7 and is fixedly connected to the first positioning hole 611, and the other first bearing 33 is fixedly connected to the side of the first shell 21 away from the second shell 22. During installation, one of the two first bearings 33 is inserted and fixed in the first positioning hole 611, and the installation of the first gear assembly is completed by fixing the other first bearing 33 to the side of the first shell 21 away from the second shell 22, and the two ends of the second gear assembly 34 are connected to the first shell 21, the second gear and the first gear are engaged, the overall structure of the speed reducer 3 is simple, the installation is convenient, and the transmission efficiency is high, so that the stable transmission of power can be ensured.

[0051] In addition, the speed reducer 3 is further connected with a third gear 35 and a differential 8, the third gear 35 is connected between the second gear and the differential 8, the driving motor 4 rotates to drive the first rotating shaft 31 and the first gear 32 on the first rotating shaft 31 to rotate, the first gear 32 drives the second gear assembly 34 to rotate for one-stage speed reduction, the second gear assembly 34 and the third gear 35 are engaged and driven to realize two-stage speed reduction, and the third gear 35 drives the differential 8 to move. Through the integration of the speed reducer 3 and the differential 8 and the direct driving connection with the power source, the driving function is realized, the gearbox and the connecting transmission shaft in the prior art are cancelled, the rear suspension length is shortened, the passability of the vehicle is improved, and the weight of the whole vehicle is reduced.

[0052] In one preferred embodiment of the utility model, as shown in Figures 1-2 The upper side of the first shell 21 is connected with an L-shaped plate 2111, the L-shaped plate 2111 is connected to the first shell 21 and forms an oil collecting groove 211 together with the first shell 21. In this embodiment, the L-shaped plate 2111 and the first shell 21 are integrally formed, the L-shaped plate 2111 is located above the first rotating shaft 31 and the first gear 32, and can collect part of the lubricating oil thrown by the first gear 32.

[0053] In one preferred embodiment of the utility model, as shown in Figures 1-2 The L-shaped plate 2111 is further connected with an inclined plate 2112 at the upper side of the two first bearings 33, the inclined plate 2112 is connected to the L-shaped plate 2111 and is inclined to the direction of the first gear 32. The bottom of the inclined plate 2112 is connected to the L-shaped plate 2111, and the top of the inclined plate 2112 is inclined to the direction of the first gear 32, the L-shaped plate 2111 and the inclined plate 2112 are integrally formed, so that the collection amount of the lubricating oil can be increased, as much lubricating oil as possible is drained to the oil seal lip, and the cooling efficiency is improved.

[0054] In one preferred embodiment of the utility model, as shown inFigures 1-2 The first shell 21 shown includes a first shell body 210 and a mounting cover 213, the first shell body 210 is provided with a first opening 2101 away from one side of the second shell 22, the first opening 2101 is connected with the mounting cover 213, and the mounting cover 213 can be covered on the first opening 2101 and cooperatively surrounded with the first shell 21 to form a mounting cavity for mounting the speed reducer 3. In this design, the first shell 21 is a split structure, which can reduce the difficulty in machining and assembly, has the characteristics of safe use, convenient assembly, quick maintenance and compact structure.

[0055] In a preferred embodiment of the present application, as shown in Figures 1-2 The inner side of the mounting cover 213 is provided with a first positioning groove 612 corresponding to the first positioning hole 611, and the two ends of the first rotating shaft 31 are respectively inserted into the first positioning hole 611 and the first positioning groove 612, so that the installation and limiting of the first rotating shaft 31 are realized through the cooperation of the first positioning groove 612 and the first positioning hole 611.

[0056] In addition, the second gear assembly 34 includes a second rotating shaft and a gear set, the gear set includes two second gears, and the two second gears are respectively engaged with the first gear 32 and the third gear 35 to realize the transmission of driving force. In addition, the first shell body 210 is provided with a second positioning groove 613 corresponding to the second rotating shaft, and the mounting cover 213 is provided with a third positioning groove 614 corresponding to the second rotating shaft, and the two ends of the second rotating shaft are respectively inserted into the second positioning groove 613 and the third positioning groove 614, so that the positioning and installation of the second gear assembly 34 are realized.

[0057] The vehicle provided by the embodiment of the present application includes the rear axle as described above, and the vehicle with the rear axle has the functions and effects as described above.

[0058] In the embodiment of the present application, the term "a plurality of" refers to two or more, unless otherwise specified. The terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integral connection. For those skilled in the art, the specific meaning of the above terms in the embodiment of the present application can be understood according to the specific situation.

[0059] In the description of the embodiment of the present application, it should be understood that the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiment of the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiment of the present application.

[0060] In the description of the present specification, the description of the terms "one embodiment", "one preferred embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above are only preferred embodiments of the embodiments of the present application and are not intended to limit the embodiments of the present application. For those skilled in the art, the embodiments of the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A rear axle, characterized in that The application relates to a transmission device, which comprises the following components: a bridge housing (1); a housing assembly (2) comprising a first housing (21) and a second housing (22), the first housing (21) being fixedly connected to the bridge housing (1), and the second housing (22) being connected to the side of the first housing (21) away from the bridge housing (1); a speed reducer (3) installed inside the first housing (21); a driving motor (4) installed inside the second housing (22), the driving end of the driving motor (4) penetrating through the second housing (22) and being connected to the speed reducer (3); a controller (5) connected to the side of the second housing (22) away from the speed reducer (3); a positioning assembly (6) comprising a first positioning member (61) and a second positioning member (62), the first positioning member (61) being connected to the side of the first housing (21) close to the second housing (22), and the second positioning member (62) being connected to the second housing (22) at a position corresponding to the first positioning member (61).

2. The rear axle of claim 1, wherein, The first positioning member (61) comprises a first positioning hole (611) formed in the first housing (21), and the second positioning member (62) comprises a positioning cylinder (621) connected to the second housing (22) at a position corresponding to the first positioning hole (611); wherein the speed reducer (3) comprises a first rotating shaft (31) corresponding to the driving motor (4), the first rotating shaft (31) being inserted into and rotationally connected to the first positioning hole (611), and the driving end of the driving motor (4) penetrating through the positioning cylinder (621) and being connected to the first rotating shaft (31).

3. The rear axle of claim 2, wherein, The side of the first rotating shaft (31) close to the driving motor (4) is connected with an oil seal (7), the first rotating shaft (31) and the oil seal (7) are inserted into the positioning cylinder (621), and the oil seal (7) is sealingly connected with the inner wall of the positioning cylinder (621).

4. The rear axle of claim 3, wherein, The first housing (21) is connected with an oil collecting groove (211) extending along the axial direction of the first rotating shaft (31) above the first rotating shaft (31), and the side of the first housing (21) close to the oil seal (7) is formed with an oil guiding groove (212) distributed along the outer periphery of the lip of the oil seal (7), the oil guiding groove (212) being connected to the oil collecting groove (211) so as to guide the lubricating oil in the first housing (21) to the oil seal (7).

5. The rear axle of claim 4, wherein, The speed reducer (3) further comprises: a first gear (32) connected to the first rotating shaft (31); two first bearings (33) respectively connected to the two ends of the first rotating shaft (31), one of the first bearings (33) being located between the first gear (32) and the oil seal (7) and being fixedly connected to the first positioning hole (611), and the other first bearing (33) being fixedly connected to the side of the first housing (21) away from the second housing (22).

6. The rear axle of claim 5, wherein, The first housing (21) is connected with an L-shaped plate (2111) above the first housing (21), the L-shaped plate (2111) being connected to the first housing (21) and surrounding the first housing (21) to form the oil collecting groove (211).

7. The rear axle of claim 6, wherein, The L-shaped plate (2111) is further connected with an inclined plate (2112) at the upper side of the two first bearings (33), the inclined plate (2112) is connected to the L-shaped plate (2111) and is inclined to the direction where the first gear (32) is located.

8. The rear axle of claim 2, wherein, The first housing (21) comprises a first housing body (210) and a mounting cover (213), the first housing body (210) is provided with a first opening (2101) on the side away from the second housing (22), the first opening (2101) is connected with the mounting cover (213), and the mounting cover (213) can be covered on the first opening (2101) and cooperates with the first housing (21) to form a mounting cavity for mounting the speed reducer (3).

9. The rear axle of claim 8, wherein, The inner side of the mounting cover (213) is provided with a first positioning groove (612) corresponding to the first positioning hole (611), and the two ends of the first rotating shaft (31) are respectively inserted into the first positioning hole (611) and the first positioning groove (612).

10. A vehicle characterized by comprising: A rear axle comprising the rear axle according to any one of claims 1-9.

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