Oil pipe, reducer, electric drive system and vehicle

Abstract

The utility model discloses an oil guide pipe, a reducer, an electric drive system and a vehicle. The oil guide pipe includes an oil guide pipe body and a first sealing convex ring. The oil guide pipe body is provided with an oil guide cavity and an oil outlet hole connected with the oil guide cavity. The peripheral wall of the oil guide pipe body is provided with an oil inlet hole, which is connected with the oil guide cavity. The first sealing convex ring is provided at one end of the oil guide pipe body away from the oil outlet hole. The oil inlet hole is located between the first sealing convex ring and the oil outlet hole. The first sealing convex ring is used to seal with a mounting hole opened on the housing of the reducer. The utility model simplifies the oil guide structure, reduces costs, and reduces assembly processes.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to an oil guide pipe, a reducer, an electric drive system and a vehicle. Background Art

[0002] The rotor assembly in the oil-cooled motor will generate heat when the motor is running, so cooling oil is needed to cool the rotor assembly. In the related technology, the motor cooling oil of the oil-cooled electric drive needs to flow from the reducer housing to the motor rotor. The flow path of the cooling oil is: rear housing-rear cover-oil guide pipe-motor rotor. The rear housing and the rear cover are sealed with a sealing gasket. This oil guide form has a complex structure, high parts cost, and complex assembly. Utility Model Content

[0003] The main purpose of the utility model is to provide an oil guide pipe, a reducer, an electric drive system and a vehicle, aiming to simplify the oil guide structure, reduce costs and reduce assembly processes.

[0004] In order to achieve the above-mentioned purpose, the oil guide pipe proposed by the utility model comprises:

[0005] An oil guide pipe body, wherein the oil guide pipe body is provided with an oil guide cavity and an oil outlet hole communicating with the oil guide cavity; an oil inlet hole is provided on a peripheral wall of the oil guide pipe body, and the oil inlet hole is communicated with the oil guide cavity; and

[0006] A first sealing convex ring, wherein the first sealing convex ring is arranged at one end of the oil guide pipe body away from the oil outlet hole; the oil inlet hole is located between the first sealing convex ring and the oil outlet hole; the first sealing convex ring is used for sealingly cooperating with the mounting hole opened on the housing of the reducer.

[0007] In an embodiment of the present invention, the outer diameter of the first sealing protrusion is greater than the outer diameter of the oil guide pipe body.

[0008] In one embodiment of the present invention, the first sealing convex ring comprises:

[0009] A first annular boss, the first annular boss is connected to the oil guide pipe body; the first annular boss is provided with a first sealing groove along the circumferential direction; and

[0010] A first sealing member is sleeved on the first annular boss and is located in the first sealing groove.

[0011] In an embodiment of the present invention, the first sealing convex ring further includes a stopper, which is arranged at an end of the first annular boss away from the oil guide pipe body, and the outer diameter of the stopper is larger than that of the first annular boss.

[0012] In an embodiment of the present utility model, the oil guide pipe further includes a second sealing convex ring, the first sealing convex ring and the second sealing convex ring are arranged at an interval, and the oil inlet hole is located between the first sealing convex ring and the second sealing convex ring.

[0013] In one embodiment of the present invention, the second sealing convex ring comprises:

[0014] A second annular boss, wherein the second annular boss is sleeved on the oil guide pipe body; the second annular boss is provided with a second sealing groove along the circumferential direction; and

[0015] A second sealing member is sleeved on the second annular boss and is located in the second sealing groove.

[0016] In an embodiment of the present invention, the outer wall surface of the oil guide pipe body is provided with reinforcing ribs.

[0017] In one embodiment of the utility model, the oil guide tube body includes an integrally connected plug-in section and an assembly section, the plug-in section is located at an end of the assembly section away from the first sealing convex ring, and a step surface is formed at the connection between the outer wall of the plug-in section and the outer wall of the oil guide tube body; the oil outlet is located on a side of the plug-in section away from the assembly section.

[0018] The utility model also provides a reducer, the reducer comprising:

[0019] The reducer body is provided with a mounting hole and an oil delivery channel;

[0020] A reducer input shaft, wherein the reducer input shaft is provided with a first mounting cavity, and the mounting hole is arranged corresponding to the first mounting cavity; and

[0021] As described above, the oil guide pipe, the oil guide pipe body of the oil guide pipe is inserted into the first installation cavity, and the first sealing convex ring of the oil guide pipe is sealed with the hole wall of the installation hole; the oil delivery channel is connected with the oil inlet hole of the oil guide pipe.

[0022] In an embodiment of the present invention, the housing is an integrally formed structure.

[0023] The utility model also provides an electric drive system, the electric drive system comprising:

[0024] A motor rotor, wherein the motor rotor has a motor rotor shaft, and the motor rotor shaft is provided with a second mounting cavity;

[0025] As for the reducer as described above, the reducer input shaft of the reducer is connected to the motor rotor shaft, and the first installation cavity is communicated with the second installation cavity, so that the oil guide pipe is inserted into the second installation cavity.

[0026] The utility model also provides a vehicle, the vehicle comprising:

[0027] The vehicle body, and

[0028] The electric drive system as described above is installed on the vehicle body.

[0029] In the technical solution of the utility model, a first sealing convex ring is provided on the oil guide pipe body. When the oil guide pipe is installed on the reducer, the oil guide pipe is inserted from the mounting hole of the reducer housing, and sealing is achieved through the sealing cooperation between the first sealing convex ring and the mounting hole. The assembly is simple. The utility model simplifies the oil guide structure, reduces costs, and reduces assembly processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 This is a structural schematic diagram of an embodiment of the oil guide pipe of the utility model;

[0032] Figure 2 for Figure 1 A cross-sectional view of

[0033] Figure 3 It is a structural schematic diagram of an embodiment of the electric drive system of the utility model.

[0034] Description of Figure Numbers:

[0035]

[0036]

[0037] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0041] The utility model proposes an oil guide pipe 1 which can be applied to a reducer of an electric drive system. The two ends of the oil guide pipe 1 are respectively connected to an oil delivery channel 21b on a reducer housing 21 and a motor rotor shaft 31 to deliver cooling oil to the inner cavity of the motor rotor shaft 31.

[0042] In the embodiment of the present utility model, Figure 1 , Figure 2 and Figure 3 As shown, the oil guide pipe 1 includes an oil guide pipe body 11 and a first sealing convex ring 12, wherein the oil guide pipe body 11 is provided with an oil guide cavity 11a and an oil outlet hole 11b communicating with the oil guide cavity 11a; an oil inlet hole 11c is provided on the peripheral wall of the oil guide pipe body 11, and the oil inlet hole 11c is communicated with the oil guide cavity 11a; the first sealing convex ring 12 is provided at one end of the oil guide pipe body 11 away from the oil outlet hole 11b; the oil inlet hole 11c is located between the first sealing convex ring 12 and the oil outlet hole 11b; the first sealing convex ring 12 is used to seal with the mounting hole 21a opened on the housing 21 of the reducer.

[0043] In this embodiment, a first sealing convex ring 12 is provided on the oil guide pipe body 11. When the oil guide pipe 1 is installed on the reducer, the oil guide pipe 1 is inserted from the mounting hole 21a of the reducer housing 21, and the sealing is achieved by the sealing cooperation between the first sealing convex ring 12 and the mounting hole 21a. The assembly is simple. The utility model simplifies the oil guide structure, reduces the cost, and reduces the assembly process.

[0044] After the oil guide pipe 1 is inserted from the mounting hole 21 a , the oil inlet hole 11 c of the oil guide pipe 1 is communicated with the oil outlet of the oil delivery channel 21 b on the housing 21 .

[0045] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the outer diameter of the first sealing protrusion 12 is larger than the outer diameter of the oil guide pipe body 11. This facilitates the installation of the oil guide pipe 1 and plays a sealing and isolating role to prevent oil leakage.

[0046] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the first sealing convex ring 12 includes a first annular boss 121 and a first sealing member 122. The first annular boss 121 is connected to the oil guide tube body 11. The first annular boss 121 is provided with a first sealing groove along the circumferential direction. The first sealing member 122 is sleeved on the first annular boss 121 and is located in the first sealing groove.

[0047] like Figure 3 As shown, during the installation of the oil guide pipe 1, the first annular boss 121 can play a positioning role. When installed in place, the first annular boss 121 cannot continue to penetrate into the reducer input shaft 22 due to the obstruction of the housing 21. At the same time, the first annular boss 121 can prevent the coolant to be introduced into the oil guide pipe 1 from leaking, and the provision of the first sealing member 122 can further play a sealing role and improve the sealing performance.

[0048] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the first sealing convex ring 12 further includes a stopper 123 , which is disposed at one end of the first annular boss 121 away from the oil guide pipe body 11 , and the outer diameter of the stopper 123 is greater than that of the first annular boss 121 .

[0049] It is understandable that the stopper 123 can further play a role of limiting and sealing. Figure 3 As shown, when the oil guide pipe 1 is installed in place, the stopper 123 abuts against the outer wall surface of the housing 21 .

[0050] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the oil guide pipe 1 further includes a second sealing convex ring 13 , the first sealing convex ring 12 and the second sealing convex ring 13 are arranged at an interval, and the oil inlet hole 11 c is located between the first sealing convex ring 12 and the second sealing convex ring 13 .

[0051] It can be understood that by providing the second sealing convex ring 13, it is possible to prevent the cooling oil from leaking in a direction away from the first sealing convex ring 12. By arranging the second sealing convex ring 13 and the first sealing convex ring 12 to be spaced apart, and the oil inlet hole 11c to be provided between the second sealing convex ring 13 and the first sealing convex ring 12, an oil delivery buffer chamber 11d can be formed between the second sealing convex ring 13 and the first sealing convex ring 12. After the cooling oil in the oil delivery channel 21b is delivered to the oil delivery buffer chamber 11d, it enters the oil guide chamber 11a from the oil inlet hole 11c.

[0052] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the second sealing convex ring 13 includes a second annular boss 131 and a second sealing member 132. The second annular boss 131 is sleeved on the oil guide tube body 11. The second annular boss 131 is provided with a second sealing groove along the circumferential direction. The second sealing member 132 is sleeved on the second annular boss 131 and is located in the second sealing groove.

[0053] It can be understood that the second annular boss 131 can prevent the coolant to be introduced into the oil guide pipe 1 from leaking, and the second sealing member 132 can further play a sealing role and improve the sealing performance.

[0054] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the outer wall surface of the oil guide pipe body 11 is provided with reinforcing ribs 14. It can be understood that by providing the reinforcing ribs 14, the strength of the oil guide pipe 1 can be enhanced and the service life can be improved.

[0055] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the oil guide tube body 11 includes an integrally connected plug-in section 111 and an assembly section 112, the plug-in section 111 is located at one end of the assembly section 112 away from the first sealing convex ring 12, and a step surface is formed at the connection between the outer wall of the plug-in section 111 and the outer wall of the oil guide tube body 11; the oil outlet hole 11b is located on the side of the plug-in section 111 away from the assembly section 112.

[0056] like Figure 3As shown, the plug-in section 111 is inserted into the second installation cavity 31a of the motor rotor shaft 31, so that the inner cavity of the motor rotor shaft 31 is connected with the oil guide cavity 11a, so as to achieve the purpose of delivering cooling oil to the inner cavity of the motor rotor shaft 31 for cooling. The connection between the outer wall of the plug-in section 111 and the outer wall of the oil guide tube body 11 forms a step surface, which can play a role in positioning and limiting.

[0057] The utility model also provides a reducer, such as Figure 3 As shown, the reducer includes a housing 21, a reducer input shaft 22 and the above-mentioned oil guide pipe 1. Since the present oil guide pipe 1 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. Among them, the reducer body is provided with a mounting hole 21a; the reducer input shaft 22 is provided with a first mounting cavity, and the mounting hole 21a is arranged corresponding to the first mounting cavity; the oil guide pipe body 11 of the oil guide pipe 1 is penetrated in the first mounting cavity, and the first sealing convex ring 12 of the oil guide pipe 1 is sealed and matched with the hole wall of the mounting hole 21a.

[0058] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the housing 21 is an integrally formed structure, and an oil delivery channel 21 b is provided in the housing 21 , and the oil delivery channel 21 b is communicated with the oil inlet hole 11 c.

[0059] Compared with the prior art, this embodiment directly opens the oil delivery channel in the housing, eliminates the rear cover plate and the sealing gasket as well as the multiple bolts used to assemble the rear cover plate, reduces the cost, and has no large sealing surface, reducing the risk of oil leakage. Since the rear cover plate is eliminated, a mounting hole can be directly opened in the housing, and the oil guide pipe is inserted through the mounting hole. In this embodiment, the housing 21 is formed by integral casting, which can improve the rigidity, which is beneficial to the product reliability and electric drive performance.

[0060] The utility model also proposes an electric drive system, such as Figure 3 As shown, the electric drive system includes a motor rotor and the reducer as described above. Since the reducer adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The motor rotor has a motor rotor shaft 31, and the motor rotor shaft 31 is provided with a second installation cavity 31a; the reducer input shaft 22 of the reducer is connected to the motor rotor shaft 31, and the first installation cavity and the second installation cavity 31a are connected, so that the oil guide pipe 1 is inserted into the second installation cavity 31a.

[0061] The utility model also provides a vehicle, which includes a vehicle body and the electric drive system as described above. Since the electric drive system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. The electric drive system is installed in the vehicle body.

[0062] The above description is only an optional embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the creative concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An oil guide pipe, applied to a reducer, characterized in that: The oil guide pipe comprises: An oil guide pipe body, wherein the oil guide pipe body is provided with an oil guide cavity and an oil outlet hole communicating with the oil guide cavity; an oil inlet hole is provided on a peripheral wall of the oil guide pipe body, and the oil inlet hole is communicated with the oil guide cavity; and A first sealing convex ring, wherein the first sealing convex ring is arranged at one end of the oil guide pipe body away from the oil outlet hole; the oil inlet hole is located between the first sealing convex ring and the oil outlet hole; the first sealing convex ring is used for sealingly cooperating with the mounting hole opened on the housing of the reducer.

2. The oil guide tube according to claim 1, characterized in that: The outer diameter of the first sealing protruding ring is greater than the outer diameter of the oil guiding pipe body.

3. The oil guide tube according to claim 1, characterized in that: The first sealing convex ring comprises: A first annular boss, the first annular boss is connected to the oil guide pipe body; the first annular boss is provided with a first sealing groove along the circumferential direction; and A first sealing member is sleeved on the first annular boss and is located in the first sealing groove.

4. The oil guide tube according to claim 3, characterized in that: The first sealing convex ring further includes a stopper, which is arranged at an end of the first annular boss away from the oil guide pipe body, and the outer diameter of the stopper is larger than that of the first annular boss.

5. The oil guide tube according to claim 1, characterized in that: The oil guide pipe further includes a second sealing convex ring, the first sealing convex ring and the second sealing convex ring are arranged at an interval, and the oil inlet hole is located between the first sealing convex ring and the second sealing convex ring.

6. The oil guide tube according to claim 5, characterized in that: The second sealing convex ring comprises: A second annular boss, wherein the second annular boss is sleeved on the oil guide pipe body; the second annular boss is provided with a second sealing groove along the circumferential direction; and A second sealing member is sleeved on the second annular boss and is located in the second sealing groove.

7. The oil guide tube according to claim 1, characterized in that: The outer wall surface of the oil guide pipe body is provided with reinforcing ribs.

8. The oil guide tube according to any one of claims 1 to 7, characterized in that: The oil guide tube body comprises an integrally connected plug-in section and an assembly section, the plug-in section is located at an end of the assembly section away from the first sealing convex ring, and a step surface is formed at the connection between the outer wall of the plug-in section and the outer wall of the oil guide tube body; the oil outlet is located on a side of the plug-in section away from the assembly section.

9. A reducer, characterized in that: The reducer comprises: The reducer body is provided with a mounting hole and an oil delivery channel; A reducer input shaft, wherein the reducer input shaft is provided with a first mounting cavity, and the mounting hole is arranged corresponding to the first mounting cavity; and The oil guide pipe according to any one of claims 1 to 8, wherein the oil guide pipe body of the oil guide pipe is inserted into the first mounting cavity, and the first sealing convex ring of the oil guide pipe is sealed with the hole wall of the mounting hole; and the oil delivery channel is connected to the oil inlet hole of the oil guide pipe.

10. The reducer according to claim 9, characterized in that: The shell is an integrally formed structure.

11. An electric drive system, characterized in that: The electric drive system comprises: A motor rotor, wherein the motor rotor has a motor rotor shaft, and the motor rotor shaft is provided with a second mounting cavity; The reducer according to claim 9 or 10, wherein the reducer input shaft of the reducer is connected to the motor rotor shaft, and the first mounting cavity is communicated with the second mounting cavity, so that the oil guide tube is inserted into the second mounting cavity.

12. A vehicle, characterized in that: The vehicle comprises: The vehicle body, and The electric drive system as claimed in claim 11, wherein the electric drive system is installed on the vehicle body.

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