Speed reducer, electric drive system and vehicle

Abstract

A speed reducer (1a), an electric drive system (1) and a vehicle. The speed reducer (1a) comprises a right housing (10), a left housing (20) and a filter assembly (30), wherein the left housing (20) is connected to the right housing (10) to form an oil stirring cavity (90); an accommodating cavity (201) is provided in the end face of the left housing (20) facing away from the right housing (10), and the accommodating cavity (201) is in communication with the oil stirring cavity (90); and the filter assembly (30) is arranged in the accommodating cavity (201) and is detachably connected to the left housing (20). The speed reducer (1a), the electric drive system (1) and the vehicle can increase the space utilization rate.

Description

Reducer, electric drive system and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2023107496647 filed on June 25, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of vehicle technology, and in particular to a reducer, an electric drive system, and a vehicle. Background Art

[0004] Electric drive systems are increasingly adopting oil cooling systems, which both dissipate heat and lubricate the system. This improves the motor's heat dissipation and assembly efficiency. Oil cooling systems typically use an oil pump and pipelines to deliver lubricating oil to the motor and reducer where it is needed. To ensure the cleanliness of the lubricating oil, filters are also used to remove impurities and sludge.

[0005] In the related art, the filter element of the lubricating oil is installed in an external hanging manner, and the housing of the entire filter element is installed outside the reducer housing. This installation method causes the filter element to occupy a large space as a whole.

[0006] Summary of the Invention

[0007] In order to solve the above technical problems, the present disclosure provides a reducer, an electric drive system and a vehicle, which aim to at least solve the technical problem of the large space occupied by the filter element to a certain extent.

[0008] The technical solutions disclosed in this disclosure are:

[0009] In one aspect, the present disclosure provides a reducer, which includes: a right housing, a left housing and a filter assembly, the left housing is connected to the right housing to form an oil stirring chamber, and the end surface of the left housing facing away from the right housing is provided with an accommodating chamber, and the accommodating chamber is communicated with the oil stirring chamber; the filter assembly is arranged in the accommodating chamber and is detachably connected to the left housing.

[0010] On the other hand, the present disclosure also provides an electric drive system including the reducer.

[0011] In yet another aspect, the present disclosure further provides a vehicle comprising the electric drive system.

[0012] The beneficial effects of the present disclosure include at least:

[0013] Since the left shell body is connected to the right shell body to form an oil stirring chamber, a accommodating chamber is provided on the end face of the left shell body facing away from the right shell body. The accommodating chamber is communicated with the oil stirring chamber. The filter assembly is arranged in the accommodating chamber. When the lubricating oil needs to be filtered, the lubricating oil enters the accommodating chamber from the oil stirring chamber and is filtered by the filter assembly in the accommodating chamber. The cavity wall of the accommodating chamber can be used as the outer shell of the filter assembly. The filter assembly provides installation space. Compared with the external filter element, the filter assembly is accommodated inside the left shell body, which reduces the space occupied by the filter assembly in the reducer, improves space utilization, and reduces the volume of the right shell body.

[0014] Since the filter assembly is detachably connected to the left housing, if the filter assembly needs to be replaced after the car has traveled a specified mileage or a specified time, the old filter assembly can be removed from the left housing, taken out of the accommodating cavity, and then the new filter assembly can be placed in the accommodating cavity and then connected to the left housing. The operation is simple and convenient. Compared with an external filter element, there is no need to replace the outer shell of the external filter element, only the filter assembly needs to be replaced, which reduces the replacement cost of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0016] Figure 1 is a schematic structural diagram of an electric drive system according to one or more embodiments of the present disclosure.

[0017] FIG2 is an exploded view of a reducer according to one or more embodiments of the present disclosure.

[0018] FIG3 is an exploded view of the filter assembly in FIG1 ;

[0019] FIG4 is a schematic structural diagram of the filter assembly in FIG3 .

[0020] In the attached figure:

[0021] Electric drive system 1, reducer 1a, drive motor 1b, electronic control structure 1c, right housing 10, left housing 20, accommodating chamber 201, input shaft mounting position 202, intermediate shaft mounting position 203, output shaft mounting position 204, main body 205, mounting part 206, first mounting seat 2061, limiting groove 207, oil inlet 208, input shaft gear set 209a, intermediate shaft gear set 209b, output shaft gear set 209c, filter assembly 30, filter element 301, sealing element 302, second mounting seat 3021, connecting part 40, first limiting part 50, second limiting part 60, sealing part 70, motor housing 80, oil stirring chamber 90. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0023] It should be noted that all directional indications in the embodiments of the present disclosure are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0024] In this disclosure, unless otherwise expressly specified or limited, the terms "connect," "fix," etc. should be understood in a broad sense. For example, "fix" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements, unless otherwise expressly specified. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0025] In addition, in the present disclosure, descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various implementation methods can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present disclosure.

[0026] The technical solution of the present disclosure will be described below with reference to the accompanying drawings and specific embodiments.

[0027] The speed reducer 1a, electric drive system 1 and vehicle provided in this embodiment are intended to at least to some extent solve the technical problem of a large space occupied by an external filter element.

[0028] Figure 1 is a schematic structural diagram of the electric drive system 1 of the reducer 1a according to one or more embodiments of the present disclosure; Figure 2 is an exploded view of the reducer 1a provided in one or more embodiments of the present disclosure; Figure 3 is an exploded view of the filter assembly of the reducer 1a in Figure 1; and Figure 4 is a schematic structural diagram of the filter assembly in Figure 3. In combination with Figures 1, 3 and 4, the reducer 1a of this embodiment includes: a right housing 10, a left housing 20 and a filter assembly 30. The left housing 20 is connected to the right housing 10 to form an oil stirring chamber 90. The end surface of the left housing 20 facing away from the right housing 10 is provided with an accommodating chamber 201, and the accommodating chamber 201 is connected to the oil stirring chamber 90. The filter assembly 30 is arranged in the accommodating chamber 201 and is detachably connected to the left housing 20.

[0029] Since the left housing 20 is connected to the right housing 10 to form an oil stirring chamber 90, an accommodating chamber 201 is provided on the end surface of the left housing 20 facing away from the right housing 10. The accommodating chamber 201 is communicated with the oil stirring chamber 90. The filter assembly 30 is arranged in the accommodating chamber 201 and is detachably connected to the left housing 20. Therefore, when the lubricating oil needs to be filtered, the lubricating oil enters the accommodating chamber 201 from the oil stirring chamber 90 and is filtered by the filter assembly 30 in the accommodating chamber 201. The cavity wall of the accommodating chamber 201 can serve as the outer shell of the filter assembly 30. The filter assembly 30 is accommodated by the accommodating chamber 201 to protect the filter assembly 30 and provide installation space for the filter assembly 30. Compared with an external filter element, the space occupied by the filter assembly 30 in the reducer 1a is reduced, the space utilization rate is improved, and the volume of the right housing 10 is reduced.

[0030] Since the filter assembly 30 is detachably connected to the left housing 20, the filter assembly 30 can be replaced after the car has traveled a specified mileage or a specified time. The old filter assembly 30 is removed from the left housing 20, taken out of the accommodating cavity 201, and then a new filter assembly 30 is placed in the accommodating cavity 201 and then connected to the left housing 20. The operation is simple and convenient. Compared with an external filter element, there is no need to replace the outer shell of the external filter element. Only the filter assembly 30 needs to be replaced, which reduces the replacement cost of the filter assembly 30.

[0031] In conjunction with Figure 1, in some embodiments, in order to ensure the volume of the accommodating chamber 201, an input shaft mounting position 202, an intermediate shaft mounting position 203 and an output shaft mounting position 204 are provided on the left housing 20. The accommodating chamber 201 is provided between the input shaft mounting position 101 and the output shaft mounting position 204, and is located above the intermediate shaft mounting position 203, so that the accommodating chamber 201 has sufficient space to accommodate the filter assembly 30.

[0032] In some embodiments, an input shaft will be installed at the input shaft mounting position 202, and an input shaft gear set 209a will be installed on the input shaft, an intermediate shaft will be installed at the intermediate shaft mounting position 203, and an intermediate shaft gear set 209b will be installed on the intermediate shaft, an output shaft will be installed at the output shaft mounting position 204, and an output shaft gear set 209c will be installed on the output shaft, and the space at the intersection of the input shaft gear set 209a, the intermediate shaft gear set 209b and the output shaft gear set 209c is large, and space can be provided to accommodate the filter assembly 30, so that the accommodating cavity 201 has enough space to accommodate the filter assembly 30, making full use of the space in the left shell 20 and the right shell 10, without increasing the size of the reducer 1a, reducing the cost, and at the same time, ensuring the beautiful appearance of the reducer 1a.

[0033] With reference to Figures 1, 3, and 4, in some embodiments, to accommodate the filter assembly 30, the left housing 20 includes a main body 205 and a mounting member 206. The main body 205 is connected to the right housing 10. The mounting member 206 is disposed on the end surface of the main body 205 facing away from the right housing 10 and is integrally formed with the main body 205. The mounting member 206 defines an accommodating cavity 201. The main body 205 and the mounting member 206 can be integrally formed by casting.

[0034] In some embodiments, when the lubricating oil needs to be filtered, the lubricating oil enters the accommodating chamber 201 from the oil stirring chamber 90, and is filtered by the filter assembly 30 in the accommodating chamber 201. The mounting member 206 can serve as the outer shell of the filter assembly 30, and the filter assembly 30 is accommodated by the accommodating chamber 201 to protect the filter assembly 30 and provide installation space for the filter assembly 30. Compared with the external filter element, the space occupied by the filter assembly 30 in the reducer 1a is reduced, the space utilization rate is improved, and the volume of the right shell 10 is reduced.

[0035] 3 and 4 , in some embodiments, to filter the lubricating oil, the filter assembly 30 includes a filter element 301 and a blocking element 302. The filter element 301 is disposed within the accommodating cavity 201. The blocking element 302 is detachably connected to the left housing 20 and blocks the end of the accommodating cavity 201 facing away from the right housing 10. In some embodiments, the filter element 301 may be a structure such as filter paper or a filter element.

[0036] In some embodiments, after the lubricating oil enters the accommodating cavity 201, the filter element 301 filters the lubricating oil. The end of the accommodating cavity 201 facing away from the right housing 10 is blocked by the blocking element 302 to prevent the lubricating oil from leaking.

[0037] In some embodiments, after the car has traveled a specified mileage or a specified time, if the filter assembly needs to be replaced, the blocking member 302 can be removed from the left shell 20, so that the old filter element 301 is exposed, the old filter element 301 is taken out of the accommodating cavity 201, and the new filter element 301 is placed in the accommodating cavity 201, and then the blocking member 302 is installed on the left shell 20. This replacement method is simple and convenient to operate. Compared with an external filter element, there is no need to replace the outer shell of the external filter element, only the filter element 301 needs to be replaced, which reduces the replacement cost of the filter assembly 30.

[0038] In some embodiments, in order to ensure that the filter element 301 fully filters the lubricating oil, the length of the filter element 301 matches the length of the accommodating cavity 201, that is, the lubricating oil entering the accommodating cavity 201 will pass through the filter element 301, so that the filter element 301 can filter all the lubricating oil entering the accommodating cavity 201.

[0039] In some embodiments, the blocking member 302 is connected to the end surface of the mounting member 206 of the left housing 20 facing away from the right housing 10 to block the end of the accommodating cavity 201 facing away from the right housing 10 .

[0040] 3 and 4 , in some embodiments, at least two first mounting seats 2061 are provided on the outer wall of the mounting member 206, and at least two second mounting seats 3021 are provided on the circumferential surface of the blocking member 302. The at least two second mounting seats 3021 correspond one-to-one with the at least two first mounting seats 2061. The connecting member 40 is passed through the second mounting seats 3021 and connected to the corresponding first mounting seats 2061 to achieve connection between the mounting member 206 and the blocking member 302, while also facilitating assembly and disassembly between the first mounting seats 2061 and the second mounting seats 3021. In some embodiments, the connecting member 40 can be a bolt, a screw, or a connecting pin.

[0041] In some embodiments, the first mounting seat 2061 is provided with a first through hole, and the second mounting seat 3021 is provided with a second through hole. The connecting member 40 is passed through the first through hole and connected to the second through hole to ensure the stability of the connection between the first mounting seat 2061 and the second mounting seat 3021, and at the same time, it also facilitates the disassembly and assembly between the first mounting seat 2061 and the second mounting seat 3021.

[0042] In some embodiments, to ensure the stability of the connection between the blocking member 302 and the mounting member 206, the number of second mounting seats 3021 can be two or more, and the number of first mounting seats 2061 can be two or more. To reduce costs, the number of second mounting seats 3021 can be three, and the number of first mounting seats 2061 can be three.

[0043] In combination with Figures 3 and 4, in some embodiments, the cross-sectional shape of the filter element 301 is annular, and a first limiting member 50 is provided on the left shell body 20. The first limiting member 50 is provided in the accommodating cavity 201, and the filter element 301 is partially sleeved on the first limiting member 50. The filter element 301 is limited by the first limiting member 50 to prevent the position of the filter element 301 in the accommodating cavity 201 from changing, so that the filter element 301 can stably filter the lubricating oil entering the accommodating cavity 201, which can improve the stability of the filter element 301 installed in the accommodating cavity 201.

[0044] 3 and 4 , in some embodiments, the length of the first stopper 50 is less than the length of the filter element 301. That is, the first stopper 50 only partially blocks the filter element 301, allowing the portion of the filter element 301 not blocked by the first stopper 50 to filter the lubricating oil entering the accommodating cavity 201. This reduces interference between the first stopper 150 and the filter element 301 in filtering the lubricating oil entering the accommodating cavity 201. In some embodiments, the first stopper 50 can be a boss protruding from the surface of the left housing 20 facing away from the right housing 10.

[0045] In some embodiments, the first limiting member 50 and the left housing 20 are integrally formed, which can reduce the difficulty of processing and improve the stability of the fixed connection between the first limiting member 50 and the left housing 20.

[0046] 4 , in some embodiments, to facilitate connection between the blocking member 302 and the left housing 20, a retaining groove 207 is defined on the end surface of the left housing 20 facing away from the right housing 10. The retaining groove 207 is coaxial with the accommodating chamber 201. The blocking member 302 is provided with a second retaining member 60, which can be embedded in the retaining groove 207. Specifically, the retaining groove 207 is defined on the end surface of the mounting member 206 of the left housing 20 facing away from the right housing 10. In some embodiments, the retaining groove 207 can have an annular cross-section, and the second retaining member 60 can also have an annular cross-section.

[0047] In some embodiments, the second limit member 60 can be a boss protruding from the surface of the blocking member 302 facing the left shell 20, that is, the second limit block 60 and the blocking member 302 can be integrally formed to ensure that the second limit member 60 is firmly connected to the blocking member 302.

[0048] In some embodiments, when the blocking member 302 is to be installed on the left housing 20 , the second limiting member 60 is embedded in the limiting groove 207 to position and limit the blocking member 302 so as to facilitate connection between the blocking member 302 and the left housing 20 .

[0049] 4 , in some embodiments, the blocking member 302 and the mounting member 206 of the left housing 20 are matched with a stopper, that is, the limiting groove 207 can serve as a negative ridge, and the second limiting member 60 can serve as a positive ridge. By matching the second limiting member 60 with the limiting groove 207, the sealing performance between the blocking member 302 and the mounting member 206 of the left housing 20 can be ensured, and the possibility of lubricating oil leakage can be reduced.

[0050] 4 , in some embodiments, to further ensure the sealing performance between the blocking member 302 and the left housing 20, a seal 70 is provided between the blocking member 302 and the left housing 20. The seal 70 seals the gap between the blocking member 302 and the left housing 20 to prevent lubricating oil leakage. In some embodiments, the seal 70 may be a sealing ring or sealant.

[0051] In some embodiments, in order to further ensure the sealing performance between the blocking member 302 and the left housing 20 , the sealing member 70 may be disposed in the limiting groove 207 .

[0052] 4 , in some embodiments, to ensure that the lubricating oil entering the accommodating chamber 201 can be fully filtered by the filter element 301, the filter element 301 has an annular cross-section. An oil inlet 208 and an oil outlet are provided on the left housing 20. The oil inlet 208 communicates with the accommodating chamber 201 and the oil stirring chamber 90. One of the oil inlet 208 and the oil outlet is located outside the filter element 301, while the other is located inside the filter element 301. The oil outlet communicates with the inner cavity of the motor housing 80.

[0053] In some embodiments, the lubricating oil in the oil stirring chamber 90 enters the accommodating chamber 201 through the oil inlet 208, is filtered by the filter element 301, and is transported to the inner cavity of the motor housing 80 through the oil outlet, so that the filter element 301 can fully filter the lubricating oil entering the accommodating chamber 201 to ensure the cleanliness of the lubricating oil.

[0054] In some embodiments, the oil inlet 208 may be located outside the filter 301, and the oil outlet may be located inside the filter 301. Of course, in other embodiments, the oil outlet may be located outside the filter 301, and the oil inlet 208 may also be located inside the filter 301.

[0055] Based on the same disclosed concept, the present disclosure also proposes an electric drive system 1, which adopts the reducer 1a. The specific structure of the reducer 1a refers to the above-mentioned embodiment. Since the top plate structure 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 repeated here.

[0056] 1 , in some embodiments, the electric drive system 1 further comprises a motor housing 80. The motor housing 80 is connected to the right housing 10. That is, the motor housing 80 is disposed on a side of the right housing 10 away from the left housing 20, i.e., the right housing 10 is disposed between the motor housing 80 and the left housing 20. The motor housing 80 is in communication with the oil stirring chamber 90. The lubricating oil in the oil stirring chamber 90 enters the accommodating chamber 201 through the oil inlet 208, is filtered by the filter element 301, and is then transported to the inner cavity of the motor housing 80 through the oil outlet to cool the motor in the motor housing 80. The oil then enters the oil stirring chamber 90.

[0057] In some embodiments, the electric drive system 1 further includes a drive motor 1b and an electric control structure 1c. The drive motor 1b is installed inside the motor housing 80, and the electric control structure 1c is installed outside the motor housing 80. The electric control structure 1c is electrically connected to the drive motor 1b to control the start and stop of the drive motor 1b.

[0058] Based on the same disclosed concept, the present disclosure also proposes a vehicle, which adopts the electric drive system 1. The specific structure of the electric drive system 1 refers to the above-mentioned embodiment. Since the top plate structure 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 repeated here.

[0059] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0060] In the description of the present disclosure, unless otherwise expressly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 present disclosure. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0062] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0063] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A reducer, comprising: right housing; A left shell body connected to the right shell body to form an oil stirring chamber, wherein an end surface of the left shell body facing away from the right shell body is provided with an accommodating chamber, and the accommodating chamber is communicated with the oil stirring chamber; and The filter assembly is arranged in the accommodating cavity and is detachably connected to the left shell body.

2. The reducer according to claim 1, wherein: The left housing is provided with an input shaft mounting position, an intermediate shaft mounting position and an output shaft mounting position, and the accommodating cavity is arranged between the input shaft mounting position and the output shaft mounting position and is located above the intermediate shaft mounting position.

3. The reducer according to claim 1, wherein: The left housing comprises: A main body connected to the right shell; and The mounting piece is arranged on the end surface of the main body away from the right shell body and is formed integrally with the main body. The mounting piece is provided with the accommodating cavity.

4. The reducer according to any one of claims 1 to 3, wherein: The filter assembly comprises: A filter element is disposed in the accommodating cavity; The blocking member is detachably connected to the left shell body and blocks the end of the accommodating cavity away from the right shell body.

5. The reducer according to claim 4, wherein: The cross-sectional shape of the filter element is annular. A first position-limiting member is provided on the left shell body. The first position-limiting member is arranged in the accommodating cavity. The filter element is partially sleeved on the first position-limiting member.

6. The reducer according to claim 4, wherein: A limiting groove is provided on the end surface of the left shell body away from the right shell body, and the limiting groove is coaxial with the accommodating cavity. A second limiting member is provided on the blocking member, and the second limiting member can be embedded in the limiting groove.

7. The reducer according to claim 4, wherein: A sealing member is provided between the blocking member and the left housing.

8. The reducer according to claim 4, wherein: The cross-sectional shape of the filter element is annular, and an oil inlet and an oil outlet are provided on the left shell body. The oil inlet is connected to both the accommodating chamber and the oil stirring chamber. Among the oil inlet and the oil outlet, one is located outside the filter element, and the other is located inside the filter element.

9. An electric drive system, comprising the reducer according to any one of claims 1 to 8.

10. A vehicle comprising the electric drive system according to claim 9.

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