Differential and vehicle having the same

Abstract

The application provides a kind of transfer and the vehicle with it, transfer includes: shell, shell includes the front shell being arranged close to power input source and the rear shell being connected with front shell, front shell and rear shell form transfer inner cavity jointly, clutch assembly is arranged in transfer inner cavity;Executing motor, the output end of executing motor is connected with clutch assembly, motor mounting cavity is arranged on rear shell, part of executing motor is located in motor mounting cavity, another part of executing motor is located outside motor mounting cavity, motor mounting cavity is communicated with transfer inner cavity, the shell of part of executing motor located in motor mounting cavity is provided with sealing element, the shell of part of executing motor located in motor mounting cavity, sealing element and rear shell are enclosed to form cooling space, oil in transfer inner cavity can enter cooling space through motor mounting cavity to execute cooling operation to executing motor.The application effectively solves the problem of oil leakage of the executing motor of the transfer in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transfer case design, in particular to a transfer case and a vehicle with the same. BACKGROUND

[0002] The transfer case is mainly used for longitudinal four-wheel drive vehicles, which is used to distribute the output torque of the transmission to the front drive axle and the rear drive axle, and is the core assembly to realize high performance of the vehicle. In recent years, the proportion of four-wheel drive vehicle sales is gradually increasing, and the proportion of luxury brand four-wheel drive vehicle sales is more than 60%. With the upgrading of domestic automobile market consumption, four-wheel drive off-road vehicles continue to be concerned.

[0003] The execution motor is the power source of the transfer case execution mechanism, and the realization of its function and the level of performance index seriously affect the performance of the transfer case and even the whole vehicle, and then affect the evaluation of the user group. In the prior art, because the execution motor cavity and the transfer case cavity form a relatively closed space, the heat dissipation of the execution motor is poor during operation, and negative pressure is formed in the execution motor cavity, which easily causes the lubricating oil in the transfer case cavity to be sucked into the execution motor cavity, causing the execution motor to leak oil, causing user complaints, and affecting the service life of the execution motor and the transfer case. In view of the problem of poor heat dissipation performance and sealing performance of the execution motor in the prior art, which causes the execution motor to leak oil, no effective solution has been proposed so far. SUMMARY

[0004] The main purpose of the present application is to provide a transfer case and a vehicle with the same to solve the problem of serious execution motor oil leakage of the transfer case in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a transfer case is provided, comprising: a housing, the housing comprising a front housing arranged close to a power input source and a rear housing connected with the front housing, the front housing and the rear housing jointly forming a transfer case inner cavity, and a clutch assembly arranged in the transfer case inner cavity; an execution motor, an output end of the execution motor being connected with the clutch assembly, the rear housing being provided with a motor mounting cavity, a part of the execution motor being located in the motor mounting cavity and another part of the execution motor being located outside the motor mounting cavity, the motor mounting cavity being in communication with the transfer case inner cavity, a seal being arranged on the outer shell of the part of the execution motor located in the motor mounting cavity, and the outer shell of the part of the execution motor located in the motor mounting cavity, the seal and the rear housing jointly forming a cooling space, and oil in the transfer case inner cavity being capable of entering the cooling space through the motor mounting cavity to perform cooling operation on the execution motor.

[0006] Further, the transfer case further comprises a transmission assembly, the transmission assembly being a worm assembly, the output end of the execution motor being located in the motor mounting cavity, one end of the worm assembly being connected with the output end of the execution motor, and the other end of the worm assembly extending into the transfer case inner cavity, the output end of the execution motor being connected with the clutch assembly through the worm assembly.

[0007] Further, the power divider further comprises a clutch executing assembly, the clutch executing assembly is a ball cam assembly, a gear structure is arranged on the ball cam assembly, the worm assembly is engaged with the gear structure, the ball cam assembly is in abutment with the clutch assembly, and the worm assembly is rotatable around the central axis of the worm assembly to drive the ball cam assembly to rotate so as to provide the clutch assembly with a preset compression force.

[0008] Further, a plurality of first heat dissipation grooves are arranged on the housing of the executing motor inside the motor mounting cavity, the first heat dissipation grooves are arranged at intervals along the circumference of the housing of the executing motor, the extension direction of each first heat dissipation groove is the same as the central axis direction of the executing motor, and each first heat dissipation groove is located in the cooling space.

[0009] Further, a plurality of second heat dissipation grooves are arranged on the housing of the executing motor inside the motor mounting cavity, the second heat dissipation grooves are arranged at intervals along the circumference of the housing of the executing motor, the extension direction of each second heat dissipation groove is the same as the central axis direction of the executing motor, each second heat dissipation groove is located outside the cooling space, and each second heat dissipation groove is in communication with the external environment so that external air enters the second heat dissipation groove to perform cooling operation on the executing motor.

[0010] Further, the inner ring of the sealing member is connected with the housing of the executing motor, the outer ring of the sealing member is connected with the rear housing, the sealing member divides the motor mounting cavity into the cooling space and the communication space which are independent of each other, the cooling space is in communication with the inner cavity of the power divider, and the communication space is in communication with the external environment, wherein the first heat dissipation groove is located in the cooling space, and the second heat dissipation groove is located in the communication space.

[0011] Further, the shaft neck of the executing motor is provided with an annular sealing groove, and the sealing member is located in the annular sealing groove.

[0012] Further, the first heat dissipation groove and the annular sealing groove are relatively independently arranged, and the second heat dissipation groove and the annular sealing groove are relatively independently arranged.

[0013] Further, the executing motor is detachably connected with the rear housing through a plurality of fixing bolts, and the fixing bolts are arranged at intervals along the circumference of the end portion of the executing motor.

[0014] According to another aspect of the present application, a vehicle is provided, comprising the power divider described above.

[0015] The technical scheme of the present application sets a sealing element on the part of the shell of the electric motor in the motor installation cavity, so that the part of the shell of the electric motor in the motor installation cavity, the sealing element and the rear shell body form a cooling space, the part of the oil in the transfer case inner cavity is guided into the cooling space, the oil carries away part of the heat of the electric motor, the heat dissipation effect of the electric motor during operation is improved, the negative pressure environment of the cavity around the electric motor due to overheating is prevented, the oil leakage of the electric motor is avoided, and the sealing element can effectively prevent the oil from leaking to the external environment. The technical scheme of the present application effectively solves the problem of serious oil leakage of the electric motor of the transfer case in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A structural schematic view of a first embodiment of the transfer case according to the present application is shown;

[0018] Figure 2 A structural schematic view of a second embodiment of the transfer case according to the present application is shown;

[0019] Figure 3 A structural schematic view of a third embodiment of the transfer case according to the present application is shown;

[0020] Figure 4 A structural schematic view of a fourth embodiment of the transfer case according to the present application is shown;

[0021] Figure 5 A structural schematic view of a first embodiment of the electric motor according to the present application is shown;

[0022] Figure 6 A structural schematic view of a second embodiment of the electric motor according to the present application is shown;

[0023] Figure 7 A structural schematic view of a fifth embodiment of the transfer case according to the present application is shown.

[0024] Among the above drawings, the following reference signs are included:

[0025] 1, rear output flange assembly; 2, ball cam assembly; 3, clutch assembly; 4, driving sprocket; 5, oil pump; 6, input shaft; 7, chain; 8, front output flange; 9, driven sprocket; 10, execution motor; 101, fixing bolt; 102, sealing element; 1031, first heat dissipation groove; 1032, annular sealing groove; 1033, second heat dissipation groove; 11, rear housing; 12, front housing; 13, worm assembly; 131, ball bearing; 132, worm; 133, needle bearing;

[0026] 20, transfer inner cavity; 21, motor mounting cavity; 22, cooling space. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component and / or combinations thereof.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] Now, exemplary embodiments according to this application will be described in greater detail by referring to the drawings. These exemplary embodiments can be implemented in various different forms, and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, and in the drawings, the thickness of layers and regions can be exaggerated for clarity, and the same reference numerals are used throughout the drawings to designate the same elements, and thus a description thereof will be omitted.

[0031] In conjunction with Figures 1 to 7 As shown, according to specific embodiments of the present application, a transfer case is provided.

[0032] The transfer case includes a housing, an execution motor 10. The housing includes a front housing 12 disposed close to a power input source and a rear housing 11 connected with the front housing 12, the front housing 12 and the rear housing 11 jointly form a transfer case inner cavity 20, a clutch assembly 3 is disposed in the transfer case inner cavity 20. The output end of the execution motor 10 is connected with the clutch assembly 3, the rear housing 11 is provided with a motor mounting cavity 21, a part of the execution motor 10 is located in the motor mounting cavity 21, another part of the execution motor 10 is located outside the motor mounting cavity 21, the motor mounting cavity 21 is in communication with the transfer case inner cavity 20, the housing of the part of the execution motor 10 located in the motor mounting cavity 21 is provided with a sealing element 102, the housing of the part of the execution motor 10 located in the motor mounting cavity 21, the sealing element 102 and the rear housing 11 jointly form a cooling space 22, the oil liquid in the transfer case inner cavity 20 can enter the cooling space 22 through the motor mounting cavity 21 to perform cooling work on the execution motor 10.

[0033] The technical scheme of the present application is applied, the seal 102 is arranged on the part of the shell of the electric motor 10 in the motor mounting cavity 21, the part of the shell of the electric motor 10 in the motor mounting cavity 21, the seal 102 and the rear shell 11 are surrounded to form a cooling space 22, the oil in the transfer case inner cavity 20 is guided into the cooling space 22, the part of the heat of the electric motor 10 is taken away by the oil, the heat dissipation effect in the working process of the electric motor 10 is improved, the negative pressure environment of the cavity around the electric motor 10 due to overheating is prevented, the oil leakage of the electric motor 10 is avoided, and the seal 102 can effectively prevent the oil from leaking to the external environment. The technical scheme of the present application effectively solves the problem of serious oil leakage of the electric motor 10 of the transfer case in the prior art. Meanwhile, the motor mounting cavity 21 is not a sealed cavity, the electric motor 10 is partially located in the motor mounting cavity 21 and partially located outside the motor mounting cavity 21 and in contact with the external environment, the motor mounting cavity 21 forms a semi-enclosed structure, the surface area of the electric motor in contact with the air is increased, and the heat dissipation effect is improved. The seal 102 can effectively prevent the lubricating oil from leaking out of the transfer case and the external dust from entering the transfer case, and improve the service life and reliability of the transfer case.

[0034] As shown in Figure 4 The transfer case further comprises a transmission assembly, the transmission assembly is a worm assembly 13, the output end of the electric motor 10 is located in the motor mounting cavity 21, one end of the worm assembly 13 is connected with the output end of the electric motor 10, the other end of the worm assembly 13 extends into the transfer case inner cavity 20, and the output end of the electric motor 10 is connected with the clutch assembly 3 through the worm assembly 13. The electric motor 10 is preferably a high-precision direct-current brushless motor. The worm assembly 13 amplifies the torque of the output end of the electric motor 10. This arrangement can effectively improve the torque response speed and improve the stability and safety. The worm assembly 13 comprises a ball bearing 131, a worm 132 and a needle bearing 133.

[0035] As shown in Figure 1 The transfer case further comprises a clutch execution assembly, the clutch execution assembly is a ball cam assembly 2, the ball cam assembly 2 is provided with a gear structure, the worm assembly 13 is engaged with the gear structure, the ball cam assembly 2 abuts against the clutch assembly 3, and the worm assembly 13 rotates around the central axis thereof to drive the ball cam assembly 2 to rotate, so as to provide the clutch assembly 3 with a pre-set compression force.

[0036] The transfer case transmission components mainly include a rear output flange assembly 1, a ball cam assembly 2, a clutch assembly 3, a driving sprocket 4, an oil pump 5, an input shaft 6, a chain 7, a front output flange 8, a driven sprocket 9, and an execution motor 10. The power transmission route of the transfer case includes: (1) two-wheel drive mode: power is directly transmitted from the input shaft 6 to the rear output flange assembly 1; (2) four-wheel drive mode: power is transmitted to the rear output flange assembly 1 directly from the input shaft 6, and power is transmitted to the front output flange 8 from the input shaft 6, the clutch 3, the driving sprocket 4, the chain 7, and the driven sprocket 9. The clutch 3 and the driving sprocket 4 are connected to the input shaft 6 through splines and transmit power, and the driven sprocket 9 is connected to the front output flange 8 through splines and transmits power. The execution motor 10 converts electrical energy into mechanical energy to drive the worm 132 to rotate. The worm 132 meshes with the driving cam of the ball cam assembly 2 to drive the driving cam to rotate. The driven cam of the ball cam assembly 2 is fixed on the rear housing 11, and the steel ball in the ball cam assembly 2 rolls along the internal spiral to move, which presses the clutch assembly 3 in the axial direction, and the clutch assembly 3 is combined to realize four-wheel drive.

[0037] Further, a plurality of first heat dissipation grooves 1031 are arranged on the shell of the execution motor 10 inside the motor mounting cavity 21, the plurality of first heat dissipation grooves 1031 are arranged at intervals along the circumference of the shell of the execution motor 10, the extension direction of each first heat dissipation groove 1031 is the same as the central axis direction of the execution motor 10, and each first heat dissipation groove 1031 is located in the cooling space 22. Preferably, the first heat dissipation groove 1031 is arranged at the end of the output end of the execution motor 10. The lubricating oil in the transfer case housing flows to the cooling space through the first heat dissipation grooves 1031 distributed on the execution motor, and takes away heat during the working process of the execution motor, preventing the execution motor from overheating and being damaged.

[0038] Further, a plurality of second heat dissipation grooves 1033 are arranged on the shell of the execution motor 10 inside the motor mounting cavity 21, the plurality of second heat dissipation grooves 1033 are arranged at intervals along the circumference of the shell of the execution motor 10, the extension direction of each second heat dissipation groove 1033 is the same as the central axis direction of the execution motor 10, and each second heat dissipation groove 1033 is located outside the cooling space 22, and each second heat dissipation groove 1033 is in communication with the external environment to enable external air to enter the second heat dissipation groove 1033 to perform cooling work on the execution motor 10. Preferably, the second heat dissipation groove 1033 is arranged on the journal of the execution motor 10.

[0039] Further, the inner ring of the sealing member 102 is connected with the housing of the execution motor 10, the outer ring of the sealing member 102 is connected with the rear housing 11, the sealing member 102 divides the motor mounting cavity 21 into the cooling space 22 and the communication space which are independent of each other, the cooling space 22 is communicated with the transfer case inner cavity 20, the communication space is communicated with the external environment, wherein the first heat dissipation groove 1031 is located in the cooling space 22, and the second heat dissipation groove 1033 is located in the communication space. The sealing member 102 is arranged between the execution motor shaft neck and the rear housing 11, the inner side forms the cooling space 22, the outer side is communicated with the atmosphere, the sealed cavity is prevented from being formed, the negative pressure environment is generated, and the lubricating oil in the transfer case inner cavity 20 is sucked. By adopting the technical scheme in the embodiment, the transfer case has the characteristics of simple structure, reliable sealing, good heat dissipation effect, low production cost and high reliability.

[0040] Preferably, the annular sealing groove 1032 is arranged at the shaft neck of the execution motor 10, and the sealing member 102 is located in the annular sealing groove 1032. The lubricating oil in the transfer case inner cavity 20 can flow to the first heat dissipation groove 1031 on the execution motor 10 through the needle bearing 133, so as to improve the heat dissipation effect of the execution motor 10. The annular sealing groove 1032 on the execution motor 10 fixes the sealing member 102 between the execution motor 10 and the rear housing 11, so that the oil leakage can be effectively prevented. The second heat dissipation groove 1033 improves the strength of the execution motor, and makes a part of the execution motor contact with the external air, so as to improve the heat dissipation effect of the execution motor. The annular sealing groove 1032 is arranged along the radial direction of the execution motor 10.

[0041] Optionally, the first heat dissipation groove 1031, the second heat dissipation groove 1033 and the annular sealing groove 1032 can be obtained by machining or casting.

[0042] The first heat dissipation groove 1031 and the annular sealing groove 1032 are relatively independently arranged, and the second heat dissipation groove 1033 and the annular sealing groove 1032 are relatively independently arranged.

[0043] The execution motor 10 is detachably connected with the rear housing 11 through the fixing bolts 101, the fixing bolts 101 are a plurality of, and the fixing bolts 101 are arranged along the circumferential direction of the end portion of the execution motor 10.

[0044] According to another specific embodiment of the present application, a vehicle is provided, comprising the transfer case in the above-mentioned embodiments.

[0045] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof (e.g., "vertical ly", "horizontal ly", etc.) can refer to the relative positions of an apparatus or feature as shown in the drawings, and shall not be construed as limiting the present application to any particular spatial orientation. Furthermore, the terms "first", "second", third", etc. merely identify one of a number of similar features or steps in an embodiment, and are not intended to denote a spatial or chronological priority of such features or steps to one another. The terms "comprise", "comprising", "include", "including", and the like, as used herein, are specifically intended to be construed as open-ended terms (i.e., the terms do not exclude the presence of other elements or steps). It is specifically intended that any total number or range of steps or components to be

[0046] In addition, it is to be appreciated that the use of any of the following "or" terms such as "comprising", "including", "containing", "consisting of", "consisting essentially of", and the like, are intended to be open-ended and allow for the possibility that the composition, process, method, article, or apparatus include more than the recited elements, to the principles of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

[0047] It is expected to find some specific exemplary embodiments more fully described herein. However, these descriptions should not be construed as specifically limited to the embodiments described herein, but rather should be understood to include any and all alternatives, modifications, equivalents, and the like, including those acquired by a process of

[0048] The above description is embodied only by the preferred embodiments of the present application, and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A transfer case, characterized in that, include: The housing includes a front housing (12) located near the power input source and a rear housing (11) connected to the front housing (12). The front housing (12) and the rear housing (11) together form a transfer case cavity (20), and a clutch assembly (3) is provided in the transfer case cavity (20). An actuator motor (10) is provided, the output end of which is connected to the clutch assembly (3). A motor mounting cavity (21) is provided on the rear housing (11). A portion of the actuator motor (10) is located inside the motor mounting cavity (21), and another portion of the actuator motor (10) is located outside the motor mounting cavity (21). The motor mounting cavity (21) is connected to the transfer case cavity (20). A seal (102) is provided on the outer shell of the portion of the actuator motor (10) located inside the motor mounting cavity (21). The outer shell of the portion of the actuator motor (10) located inside the motor mounting cavity (21), the seal (102), and the rear housing (11) form a cooling space (22). The oil in the transfer case cavity (20) can enter the cooling space (22) through the motor mounting cavity (21) to perform a cooling operation on the actuator motor (10). The housing of the actuator (10) located inside the motor mounting cavity (21) is provided with a plurality of second heat dissipation slots (1033). The plurality of second heat dissipation slots (1033) are arranged circumferentially along the housing of the actuator (10). The extension direction of each second heat dissipation slot (1033) is the same as the direction of the central axis of the actuator (10). Each second heat dissipation slot (1033) is located outside the cooling space (22). Each second heat dissipation slot (1033) is connected to the external environment so that the outside air enters the second heat dissipation slot (1033) to perform cooling operation on the actuator (10).

2. The transfer case according to claim 1, characterized in that, The transfer case also includes a transmission assembly, which is a worm gear assembly (13). The output end of the actuator motor (10) is located in the motor mounting cavity (21). One end of the worm gear assembly (13) is connected to the output end of the actuator motor (10), and the other end of the worm gear assembly (13) extends into the inner cavity (20) of the transfer case. The output end of the actuator motor (10) is connected to the clutch assembly (3) through the worm gear assembly (13).

3. The transfer case according to claim 2, characterized in that, The transfer case also includes a clutch actuator assembly, which is a ball cam assembly (2). The ball cam assembly (2) is provided with a gear tooth structure. The worm gear assembly (13) meshes with the gear tooth structure. The ball cam assembly (2) abuts against the clutch assembly (3). The worm gear assembly (13) can drive the ball cam assembly (2) to rotate around its own central axis, so as to provide a preset clamping force to the clutch assembly (3).

4. The transfer case according to claim 3, characterized in that, The housing of the actuator (10) located inside the motor mounting cavity (21) is provided with a plurality of first heat dissipation slots (1031). The plurality of first heat dissipation slots (1031) are arranged circumferentially along the housing of the actuator (10). The extension direction of each first heat dissipation slot (1031) is the same as the direction of the central axis of the actuator (10). Each first heat dissipation slot (1031) is located in the cooling space (22).

5. The transfer case according to claim 4, characterized in that, The inner ring of the seal (102) is connected to the housing of the actuator motor (10), and the outer ring of the seal (102) is connected to the rear housing (11). The seal (102) divides the motor mounting cavity (21) into a cooling space (22) and a communicating space that are independent of each other. The cooling space (22) is connected to the transfer case cavity (20), and the communicating space is connected to the external environment. The first heat sink (1031) is located in the cooling space (22), and the second heat sink (1033) is located in the communicating space.

6. The transfer case according to claim 4, characterized in that, The journal of the actuator (10) is provided with an annular sealing groove (1032), and the seal (102) is located in the annular sealing groove (1032).

7. The transfer case according to claim 6, characterized in that, The first heat dissipation groove (1031) and the annular sealing groove (1032) are arranged relatively independently, and the second heat dissipation groove (1033) and the annular sealing groove (1032) are arranged relatively independently.

8. The transfer case according to any one of claims 1 to 7, characterized in that, The actuator (10) is detachably connected to the rear housing (11) by fixing bolts (101). There are multiple fixing bolts (101), which are spaced apart circumferentially along the end of the actuator (10).

9. A vehicle, comprising a transfer case, characterized in that, The transfer case is the transfer case according to any one of claims 1 to 8.

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