Integrated oil pan and distributed electric drive axle

Abstract

An integrated oil pan and a distributed electric drive axle relate to the technical field of electric drive axles, the integrated oil pan comprises an oil pan body, an oil pump, a filter and an oil cooler, the oil pan body is provided with a motor oil groove and a speed reducer oil groove, and is provided with an oil gathering cavity communicated with the motor oil groove and the speed reducer oil groove; the oil pump, the filter and the oil cooler are arranged on the oil pan body and used for pressurizing, filtering and cooling oil in the oil gathering cavity. The integrated oil pan provided by the utility model adopts an integrated cavity separation type design, the structures and functions of a motor oil pan and a speed reducer oil pan are integrated, and an oil pump, a filter and an oil cooler are integrated on the oil pan body, so that the number of parts of an electric drive axle is reduced, the compact and light-weight design is realized, and the cost is reduced. The system has the advantages of high integration level, strong universality, low production cost, and low installation and maintenance cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric drive axle technical field especially relates to an integrated oil pan and distributed electric drive axle. BACKGROUND

[0002] The oil pan is an important component of mechanical equipment (such as reducer, motor, engine, etc.) for storing lubricating oil and assisting the normal operation of the equipment. Although the oil pans of different equipment have differences in detail design, the working principles are essentially common, which utilize the physical properties of lubricating oil to achieve a closed loop of "oil storage-oil supply-oil return-heat dissipation-filtration" through mechanical structure design, thereby achieving lubrication and protection effects, and ultimately prolonging the service life of the equipment and improving the operation efficiency.

[0003] In the distributed electric drive axle system of the existing heavy truck, the reducer and the motor are respectively provided with relatively independent and structurally different oil pans, which has the following problems: first, the large number of oil pans makes the overall size and weight of the electric drive axle large, which is contrary to the current design trend of compactness and light weight of the electric drive axle; second, the oil pan structures of the reducer and the motor are different, and separate mold production is required, which greatly increases the mold opening cost and procurement cost; third, the split type design of the oil pan has the problems of difficult assembly and maintenance, which further increases the use cost and time cost.

[0004] The above problems restrict the promotion and optimization and upgrading of the distributed electric drive axle of the heavy truck, and therefore improvement is urgently needed. SUMMARY

[0005] The utility model provides an integrated oil pan and distributed electric drive axle, which mainly aims at solving the problems in the prior art.

[0006] The utility model adopts the following technical scheme:

[0007] An integrated oil pan comprises an oil pan body, an oil pump, a filter and an oil cooler, the oil pan body is provided with a motor oil groove and a reducer oil groove, and is provided with an oil collecting cavity communicated with the motor oil groove and the reducer oil groove; the oil pump, the filter and the oil cooler are arranged on the oil pan body and are respectively used for pressurizing, filtering and cooling the oil in the oil collecting cavity.

[0008] Further, the reducer oil groove is directly communicated with the oil collecting cavity; the oil pan body is provided with a motor oil collecting cavity, and the motor oil groove is indirectly communicated with the oil collecting cavity through the motor oil collecting cavity.

[0009] Further, the reducer oil groove is provided with a reducer oil inlet hole communicated with the oil collecting cavity, and is provided with a plugging member for plugging the reducer oil inlet hole.

[0010] Further, the motor oil groove is provided with a motor oil inlet hole communicated with the motor oil collecting cavity, and the motor oil collecting cavity is communicated with the oil collecting cavity through an oil outlet pipe.

[0011] Further, the motor oil groove is provided with a motor oil inlet hole communicated with the motor oil collecting cavity, and the motor oil collecting cavity is communicated with the oil collecting cavity through an oil outlet pipe.

[0012] Further, the two ends of the oil collecting cavity are respectively provided with a first mounting part and a second mounting part, the oil pump is arranged on the first mounting part, and the filter is arranged on the second mounting part.

[0013] Further, the bottom of the oil pan body is provided with a third mounting part for mounting the oil cooler, and the third mounting part is embedded with a water circuit and an oil circuit of the oil cooler.

[0014] Further, the top of the oil pan body is provided with an oil pump oil storage groove, which is provided with an oil pump oil outlet hole communicated with the oil pump and an oil inlet hole communicated with the oil cooler.

[0015] A distributed electric drive axle comprises an axle housing, a first motor, a first reducer, a second motor and a second reducer, the first motor and the first reducer are arranged on one side of the axle housing through a first mounting shell matched with a first oil pan, and the second motor and the second reducer are arranged on the other side of the axle housing through a second mounting shell matched with a second oil pan; the first oil pan and the second oil pan adopt the integrated oil pan as described above.

[0016] Further, the motor oil collecting cavities of the first oil pan and the second oil pan are communicated through an oil collecting pipe, and the motor oil collecting cavity of the first oil pan is connected to the oil collecting cavity of the first oil pan through an oil outlet pipe; the reducer oil grooves of the first oil pan and the second oil pan are communicated through the axle housing, and the reducer oil groove of the second oil pan is communicated with the oil collecting cavity of the second oil pan through a reducer oil inlet hole.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1、The integrated oil pan adopts the integrated cavity design, integrates the structures and functions of the motor oil pan and the reducer oil pan, and integrates the oil pump, the filter and the oil cooler on the oil pan body, so that the number of parts of the electric drive axle is reduced, compactness and lightweight design are realized, and the integrated oil pan has the advantages of high integration, strong universality, low production cost, low installation and maintenance cost.

[0019] 2. The integrated oil sump can easily switch the oil supply mode, is flexible and convenient to operate, has good versatility, and can be adapted to various electric drive axles with different structures such as a double-motor distributed drive axle and a single-motor central integrated electric drive axle. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a perspective view of an integrated oil sump according to an embodiment of the present application.

[0021] Figure 2 FIG. 2 is a top view of the integrated oil sump according to the embodiment of the present application.

[0022] Figure 3 FIG. 3 is a first perspective view of an oil sump body according to the embodiment of the present application.

[0023] Figure 4 FIG. 4 is a second perspective view of the oil sump body according to the embodiment of the present application.

[0024] Figure 5 FIG. 5 is a perspective view of a distributed electric drive axle according to another embodiment of the present application.

[0025] Figure 6 FIG. 6 is a side view of the distributed electric drive axle according to the embodiment of the present application.

[0026] In the drawings: 10 - oil sump body; 101 - motor oil groove; 102 - reducer oil groove; 103 - oil collection cavity; 104 - reducer oil inlet hole; 105 - motor oil collection cavity; 106 - motor oil inlet hole; 107 - motor oil outlet hole; 108 - first mounting portion; 109 - second mounting portion; 110 - third mounting portion; 111 - water line; 112 - oil line; 113 - oil pump oil storage groove; 114 - oil pump oil outlet hole; 115 - oil inlet hole; 116 - oil outlet hole; 11 - oil pump; 12 - filter; 13 - oil cooler; 20 - axle housing; 21 - first mounting housing; 22 - first oil sump; 23 - second mounting housing; 24 - second oil sump. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be described below with reference to the accompanying drawings. In order to fully understand the present application, many details will be described below, but the present application can be implemented without these details for those skilled in the art.

[0028] Embodiment 1:

[0029] As Figure 1 and Figure 2As shown, the embodiment provides an integrated oil pan, which comprises an oil pan body 10, an oil pump 11, a filter 12 and an oil cooler 13. The oil pan body 10 is provided with a motor oil groove 101 and a reducer oil groove 102, and is provided with an oil collection cavity 103 communicated with the motor oil groove 101 and the reducer oil groove 102. The oil pump 11, the filter 12 and the oil cooler 13 are arranged on the oil pan body 10, and are respectively used for pressurizing, filtering and cooling the oil in the oil collection cavity 103. Specifically, the oil pump 11 is used for pressurizing the oil in the oil collection cavity 103, the filter 12 is used for filtering the pressurized oil, and the oil cooler 13 is used for cooling the filtered oil. The integrated oil pan adopts an integrated cavity design, integrates the structures and functions of the motor oil pan and the reducer oil pan, and integrates the oil pump 11, the filter 12 and the oil cooler 13 on the oil pan body 10, thereby helping to reduce the number of parts of the electric drive axle, realizing compact and lightweight design, and having the advantages of high integration, strong universality, low production cost and low installation and maintenance cost.

[0030] As shown in the figure, Figures 1 to 3 The reducer oil groove 102 is directly communicated with the oil collection cavity 103. Specifically, the reducer oil groove 102 is provided with a reducer oil inlet hole 104 communicated with the oil collection cavity 103, and is provided with a blocking piece (not shown in the figure) for blocking the reducer oil inlet hole 104. In some working scenarios, the reducer oil inlet hole 104 is in an open state, and the reducer oil groove 102 is used for collecting reducer oil inside the reducer. The reducer oil enters the oil collection cavity 103 through the reducer oil inlet hole 104 for filtering and cooling treatment, thereby ensuring the normal operation of the reducer. In other working scenarios, the reducer oil inlet hole 104 can be blocked by the blocking piece to be in a closed state, thereby preventing the reducer oil from flowing into the oil collection cavity 103.

[0031] As shown in the figure, Figures 1 to 3 The oil pan body 10 is provided with a motor oil collection cavity 105, and the motor oil groove 101 is indirectly communicated with the oil collection cavity 103 through the motor oil collection cavity 105. Specifically, the motor oil groove 101 is provided with a motor oil inlet hole 106 communicated with the motor oil collection cavity 105, the motor oil collection cavity 105 is provided with a motor oil outlet hole 107 for assembling an oil outlet pipe (not shown in the figure), and the motor oil collection cavity 105 is communicated with the oil collection cavity 103 through the oil outlet pipe. In some working scenarios, the motor oil collection cavity 105 is communicated with the oil collection cavity 103 through the oil outlet pipe, the motor oil groove 101 is used for collecting motor oil inside the motor, the motor oil enters the motor oil collection cavity 105 through the motor oil inlet hole 106, and enters the oil collection cavity 103 through the oil outlet pipe for filtering and cooling treatment, thereby ensuring the normal operation of the motor. In other working scenarios, the connection between the oil outlet pipe and the oil collection cavity 103 can be cut off, thereby preventing the motor oil from flowing into the oil collection cavity 103.

[0032] like Figures 1 to 3 As shown, as a preferred embodiment, the reducer oil sump 102 and the motor oil sump 101 are located on the top of the oil pan body 10, and the motor oil collecting chamber 105 and the oil collecting chamber 103 are arranged side by side inside the oil pan body 10. This design can be adapted to the layout of the motor and reducer on the electric drive bridge and can maximize the utilization of the space in the oil pan body 10.

[0033] like Figures 1 to 4 As shown, the oil collection chamber 103 has a first mounting part 108 and a second mounting part 109 at both ends, respectively. The oil pump 11 is mounted in the first mounting part 108, and the filter 12 is mounted in the second mounting part 109. The bottom of the oil pan body 10 also has a third mounting part 110 for mounting the oil cooler 13. The third mounting part 110 is embedded with the water pipe 111 and oil pipe 112 of the oil cooler 13. This design makes the layout of the oil pump, filter 12 and oil cooler 13 more compact and reasonable, which helps to optimize the structure of the integrated oil pan and save its layout space.

[0034] like Figures 1 to 4 As shown, the top of the oil sump body 10 is also provided with an oil pump storage tank 113. This oil pump storage tank 113 has an oil pump outlet 114 connected to the oil pump and an oil inlet 115 connected to the oil cooler 13. After being filtered by the filter 12, the oil enters the oil pump storage tank 113 through the oil pump outlet 114 for temporary storage. When the oil level rises, it automatically enters the oil cooler 13 through the oil inlet 115 for cooling, and is finally discharged through the oil outlet 116 of the oil pipeline 112. This design increases the oil storage capacity of the oil sump body 10, thereby further enhancing the overall oil handling capacity.

[0035] like Figures 1 to 4 As shown, as a preferred embodiment: the first mounting part 108 and the second mounting part 109 are mounting grooves located at both ends of the oil collection cavity 103, and the third mounting part 110 is a mounting recess located at the bottom of the oil pan body 10. By rationally designing the structure of each mounting part, the space utilization of the oil pan body 10 can be maximized, making the structure of the integrated oil pan more rational and compact.

[0036] According to the above analysis, in different working scenarios, the oil entering the oil collection cavity 103 can include the following three types: (1) motor oil from the motor oil groove 101; (2) reducer oil from the reducer oil groove 102; (3) mixed oil of the reducer oil from the reducer oil groove 102 and the motor oil from the motor oil groove 101. That is, the integrated oil pan provided in the embodiment can not only supply oil to the motor alone, but also supply oil to the reducer alone, and also supply oil to the motor and the reducer simultaneously. Therefore, by adjusting the oil path structure of the integrated oil pan, the oil supply mode can be easily switched, which is flexible and convenient to operate, has good versatility, and can be adapted to various electric drive axles with different structures such as double-motor distributed drive axle and single-motor central integrated electric drive axle.

[0037] Embodiment two:

[0038] As shown in Figure 5 and Figure 6 , the embodiment further provides a distributed electric drive axle suitable for heavy trucks, which includes an axle housing 20, a first motor (not shown in the figure), a first reducer (not shown in the figure), a second motor (not shown in the figure), and a second reducer (not shown in the figure). The first motor and the first reducer are arranged on one side of the axle housing 20 through a first mounting shell 21 in cooperation with a first oil pan 22, and the second motor and the second reducer are arranged on the other side of the axle housing 20 through a second mounting shell 23 in cooperation with a second oil pan 24. The first oil pan 22 and the second oil pan 24 adopt the integrated oil pan with the structure provided in the embodiment one, so that the oil pans of the entire distributed electric drive axle are reduced from four in the prior art to two, and the structures of the two oil pans are completely identical, thereby reducing the number and weight of parts, reducing production cost and difficulty, and helping to realize compact and lightweight design of the electric drive axle.

[0039] As shown in Figures 1 to 6 , since the motor oil and the reducer oil used by the distributed electric drive axle cannot be mixed, the embodiment adopts a single-side independent oil supply mode, that is, the first oil pan 22 and the second oil pan 24 supply oil to the motor and the reducer respectively. Specifically, the motor oil collection cavities 105 of the first oil pan 22 and the second oil pan 24 are connected through an oil connection pipe (not shown in the figure), and the motor oil collection cavity 105 of the first oil pan 22 is connected to the oil collection cavity 103 of the first oil pan 22 through an oil outlet pipe (not shown in the figure); the reducer oil grooves 102 of the first oil pan 22 and the second oil pan 24 are connected through the axle housing 20, and the reducer oil groove 102 of the second oil pan 24 is connected to the oil collection cavity 103 of the second oil pan 24 through the reducer oil inlet hole 104.

[0040] The working modes of the first oil pan 22 and the second oil pan 24 are described in detail as follows:

[0041] The motor oil of the first motor and the second motor is respectively collected into the motor oil groove 101 of the first oil pan 22 and the second oil pan 24, and is collected into the motor oil collection cavity 105 from the motor oil inlet hole 106; the motor oil of the second oil pan 24 is collected into the motor oil collection cavity 105 of the first oil pan 22 through the oil collecting pipe, and is introduced into the oil collection cavity 103 of the first oil pan 22 through the oil outlet pipe; the motor oil of the first motor and the second motor is pressurized by the oil pump 11 in the oil collection cavity 103 of the first oil pan 22, and is filtered by the filter 12; then, the motor oil is collected into the oil pump oil storage groove 113 from the oil pump oil outlet hole 114, and is introduced into the oil cooler 13 from the oil inlet hole 115 of the first oil pan 22 after the liquid level rises, is cooled by the cooling water, and is finally introduced into the first motor and the second motor for use.

[0042] The reducer oil of the first reducer and the second reducer is respectively collected into the reducer oil groove 102 of the first oil pan 22 and the second oil pan 24, and then the reducer oil in the reducer oil groove 102 of the first oil pan 22 is collected into the reducer oil groove 102 of the second oil pan 24 through the bridge housing 20, and is collected into the oil collection cavity 103 from the reducer oil inlet hole 104; the reducer oil of the first reducer and the second reducer is pressurized by the oil pump 11 in the oil collection cavity 103 of the second oil pan 24, and is filtered by the filter 12; then, the reducer oil is collected into the oil pump oil storage groove 113 from the oil pump oil outlet hole 114, and is introduced into the oil cooler 13 from the oil inlet hole 115 after the liquid level rises, is cooled by the cooling water, and is finally introduced into the first reducer and the second reducer for use.

[0043] With reference to the embodiment, in other electric drive bridge structures (for example, a single-motor central integrated electric drive bridge), if the motor oil and the reducer oil can be mixed and shared, the reducer oil groove 102 and the motor oil collection cavity 105 of the same integrated oil pan can be connected with the oil collection cavity 103, so that the integrated oil pan is further changed into an integrated design of the motor and the reducer sharing oil.

[0044] The above is only a specific embodiment of the present application, but the design concept of the present application is not limited thereto, and any non-substantial change of the present application by using the concept should belong to the act of infringing the protection scope of the present application.

Claims

1. An integrated oil pan characterized by: The oil pan body is provided with a motor oil groove and a reducer oil groove, and is provided with an oil collecting cavity communicated with the motor oil groove and the reducer oil groove; the oil pump, the filter and the oil cooler are arranged in the oil pan body and are respectively used for pressurizing, filtering and cooling the oil in the oil collecting cavity.

2. An integrated oil pan as set forth in claim 1 wherein: The reducer oil groove is directly communicated with the oil collecting cavity; the oil pan body is provided with a motor oil collecting cavity, and the motor oil groove is indirectly communicated with the oil collecting cavity through the motor oil collecting cavity.

3. An integrated oil pan as set forth in Claim 2 wherein: The reducer oil groove is provided with a reducer oil inlet hole communicated with the oil collecting cavity, and is provided with a plugging member for plugging the reducer oil inlet hole.

4. An integrated oil pan as set forth in Claim 2 wherein: The motor oil groove is provided with a motor oil inlet hole communicated with the motor oil collecting cavity, and the motor oil collecting cavity is communicated with the oil collecting cavity through an oil outlet pipe.

5. An integrated oil pan as set forth in Claim 2 wherein: The reducer oil groove and the motor oil groove are arranged at the top of the oil pan body, and the motor oil collecting cavity and the oil collecting cavity are arranged side by side in the oil pan body.

6. An integrated oil pan as in claim 1, wherein: The two ends of the oil collecting cavity are respectively provided with a first mounting part and a second mounting part, the oil pump is arranged in the first mounting part, and the filter is arranged in the second mounting part.

7. An integrated oil pan as in claim 1, wherein: The bottom of the oil pan body is provided with a third mounting part for mounting the oil cooler, and the third mounting part is embedded with a water circuit and an oil circuit of the oil cooler.

8. An integrated oil pan as in claim 1, wherein: The top of the oil pan body is provided with an oil pump oil storage groove, the oil pump oil storage groove is provided with an oil pump oil outlet hole communicated with the oil pump, and is provided with an oil inlet hole communicated with the oil cooler.

9. A distributed electric drive axle comprising an axle housing, a first electric motor, a first speed reducer, a second electric motor, and a second speed reducer, characterized in that: The first motor and the first reducer are arranged on one side of the axle housing through a first mounting shell matched with a first oil pan, the second motor and the second reducer are arranged on the other side of the axle housing through a second mounting shell matched with a second oil pan, and the first oil pan and the second oil pan adopt the integrated oil pan as shown in claim 1.

10. A distributed electric drive axle as in claim 9, wherein: The motor oil collecting cavities of the first oil pan and the second oil pan are communicated through an oil collecting pipe, the motor oil collecting cavity of the first oil pan is connected to the oil collecting cavity of the first oil pan through an oil outlet pipe, the reducer oil grooves of the first oil pan and the second oil pan are communicated through the axle housing, and the reducer oil groove of the second oil pan is communicated with the oil collecting cavity of the second oil pan through a reducer oil inlet hole.

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