Lubricating structure of power transmission mechanism, speed change device and vehicle

Abstract

The utility model provides a lubricating structure of a power transmission mechanism, a speed change device and a vehicle, the lubricating structure of the power transmission mechanism belongs to the technical field of power system lubrication, the lubricating structure is arranged on a shell of the power transmission mechanism, and a first cavity and a second cavity are formed in the shell. The first cavity and the second cavity are separated by a partition plate, the first cavity is used for containing the clutch, the second cavity is used for containing a power output unit of the power transmission mechanism, and the lubricating structure comprises a first communicating part arranged on the partition plate and a guide piece arranged in the second cavity; the guide piece is used for guiding lubricating oil entering the second cavity from the first cavity through the first communication part to flow to the power output unit. According to the lubricating structure of the power transmission mechanism, the communicating part and the guide piece are arranged, the structure is simple, the occupied space is small, machining is convenient, the machining cost is low, and the power output unit can be well lubricated.

Description

Technical Field

[0001] The utility model relates to the technical field of power system lubrication, and particularly relates to a lubrication structure of a power transmission mechanism. At the same time, the utility model also relates to a speed change device applying the lubrication structure of the power transmission mechanism as above, and a vehicle applying the speed change device as above. Background Technique

[0002] A clutch is a device for engaging or disengaging the power transmission of an engine, and plays a crucial role in mechanical equipment such as automobiles. The clutch is mainly used to ensure the smooth start of an automobile. By controlling the connection and disconnection between the engine and the transmission, the automobile can smoothly transition from a stationary state to a driving state.

[0003] A differential is an important part of a vehicle transmission system and belongs to the power output part of the power transmission mechanism. The main function of the differential is to enable the left and right wheels to roll at different speeds when the vehicle is turning or driving on an uneven road surface, that is, to ensure that the two driving wheels make pure rolling movements, thereby improving the stability and passability of the vehicle.

[0004] In existing power transmission mechanisms such as transmissions, the clutch and the power output unit need to be designed with separate lubricating oil circuits. Due to the limited space inside the housing of the power transmission mechanism and the complex internal structure, it is difficult to arrange the lubricating oil circuits for the clutch and the power output unit. Moreover, the existing lubrication structure is complex and costly, which will increase the processing difficulty of the housing. Content of the Utility Model

[0005] In view of this, the utility model aims to propose a lubrication structure of a power transmission mechanism, which has a simple structure and a good lubrication effect.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A lubrication structure of a power transmission mechanism is arranged on the housing of the power transmission mechanism. A first cavity and a second cavity are constructed inside the housing. The first cavity and the second cavity are separated by a partition, and the first cavity is used to accommodate a clutch, and the second cavity is used to accommodate the power output unit of the power transmission mechanism;

[0008] The lubrication structure includes a first communication part arranged on the partition, and a guiding part arranged in the second cavity. The guiding part is used to guide the lubricating oil flowing from the first cavity into the second cavity through the first communication part to flow towards the power output unit.

[0009] Further, the second cavity includes an installation cavity and a receiving cavity that are communicated with each other. The output unit includes an output shaft, a bearing and an oil seal sleeved on the output shaft, and a differential that is drivingly connected to the output shaft. The bearing and the oil seal are installed in the installation cavity, and the differential is received in the receiving cavity;

[0010] The guiding member is disposed in the receiving cavity and includes a first guiding member and a second guiding member. The first guiding member is used for guiding the lubricating oil to flow to the bearing and the oil seal, and the second guiding member is used for guiding the lubricating oil to flow to the differential.

[0011] Further, on the cross-section of the housing, the first communication portion is located on the connection line between the center of the first cavity and the center of the second cavity; and / or,

[0012] The first guiding member and the second guiding member are arranged vertically.

[0013] Further, a second communication portion is provided in the upper part of the side wall of the installation cavity, and the first guiding member is used for guiding the lubricating oil to flow to the bearing and the oil seal after flowing through the second communication portion.

[0014] Further, the first guiding member includes a guiding main body having a guiding groove, and a first installation portion and a second installation portion arranged near both ends of the guiding main body. The guiding main body is installed in the receiving cavity through the first installation portion and the second installation portion;

[0015] The notch of the guiding groove is arranged upward, one end of the guiding groove faces the first communication portion, and the other end of the guiding groove faces the second communication portion.

[0016] Further, a first reinforcing rib is provided between the guiding main body and the first installation portion; and / or,

[0017] A second reinforcing rib is provided between the guiding main body and the second installation portion.

[0018] Further, the second communication portion includes a notch provided in the upper part of the side wall of the installation cavity.

[0019] Further, the second guiding member includes a guiding plate disposed in the receiving cavity, and the guiding plate is connected between the partition plate and the end side wall of the installation cavity.

[0020] Compared with the prior art, the present utility model has the following advantages:

[0021] The lubrication structure of the power transmission mechanism described in the present utility model has a simple structure, occupies a small space, is convenient for processing, and has a relatively low processing cost. By providing a communication part on the partition plate in the housing and a guiding part in the second cavity, it can lubricate the power output unit well.

[0022] In addition, while providing a first guiding part for the bearing and the oil seal, a second guiding part is provided for the differential. This can achieve the lubrication of the bearing, the oil seal, and the differential simultaneously, making the overall structure simpler. By making the first communication part located on the connection line between the centers of the first cavity and the second cavity, it is convenient for the lubricating oil in the first cavity to flow into the second cavity. At the same time, it is convenient to lubricate the bearing, the oil seal, and the differential. By arranging the first guiding part and the second guiding part vertically, the space can be fully utilized, and the oil can be split, enabling targeted lubrication of the bearing, the oil seal, and the differential respectively, and achieving a better lubrication effect.

[0023] In addition, a second communication part is provided at the upper part of the side wall of the installation cavity, and the first guiding part guides the lubricating oil to flow through the second communication part to the bearing and the oil seal, making the overall structure simpler, facilitating the overall layout, and achieving a better lubrication effect on the bearing and the oil seal.

[0024] As for making the first guiding part include a guiding main body, a first installation part, and a second installation part, and the guiding main body is installed in the accommodating cavity through the first installation part and the second installation part. Since the first installation part and the second installation part are arranged near both ends of the guiding main body, the stability and reliability of the fixation of the first guiding part can be improved. The notch of the guiding groove faces upward, and both ends are respectively communicated with the first communication part and the second communication part. The structure is simple, and when the housing is processed and formed, there is no need to form the first guiding part, which is convenient for processing.

[0025] By providing a first reinforcing rib and a second reinforcing rib, the structural strength of the first guiding part can be improved, which is beneficial to improving the application reliability of the first guiding part. The second communication part is set as a notch at the upper part of the side wall of the installation cavity, which is convenient for processing the housing. The second guiding part is set as a guiding plate, which can be integrally formed with the housing, also making the housing processing convenient and facilitating guiding the lubricating oil above the differential.

[0026] Another object of the present utility model is to provide a speed change device, which includes a housing and a power transmission mechanism arranged in the housing;

[0027] The housing is provided with the lubrication structure of the power transmission mechanism as described above.

[0028] In addition, yet another object of the present utility model is to provide a vehicle, which is provided with the speed change device as described above.

[0029] For the vehicle and transmission device of the present utility model, by applying the lubrication structure of the power transmission mechanism as described above, the advantages of the lubrication structure of the power transmission mechanism, such as simple structure, small occupied space, convenient processing, and low processing cost, can be utilized to reduce the processing cost of the vehicle and transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0031] Figure 1 is a schematic structural diagram of the lubrication structure of the power transmission mechanism according to the first embodiment of the present utility model in an applied state;

[0032] Figure 2 is Figure 1 an enlarged view of part A of

[0033] Figure 3 is Figure 1 a schematic structural diagram from another perspective;

[0034] Figure 4 is a cross-sectional view taken along line B-B in Figure 3 ;

[0035] Figure 5 is a schematic structural diagram of the first guide member according to the first embodiment of the present utility model;

[0036] Figure 6 is Figure 5 a schematic structural diagram from another perspective.

[0037] Description of the reference numerals:

[0038] 1, housing; 2, clutch; 3, power output unit; 4, guide member;

[0039] 101, first cavity; 102, second cavity; 103, partition;

[0040] 1021, installation cavity; 10211, second communication part; 1022, accommodation cavity; 1031, first communication part;

[0041] 301, bearing; 302, oil seal; 303, differential;

[0042] 401, first guide member; 402, second guide member;

[0043] 4011. Guide body; 4012. First mounting part; 40121. Through hole; 40122. Screw; 4013. Second mounting part; 40131. Positioning post; 4014. First reinforcing rib; 4015. Second reinforcing rib. Detailed implementation mode

[0044] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0045] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0046] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0047] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0048] Embodiment 1

[0049] This embodiment relates to a lubrication structure of a power transmission mechanism, which has a simple structure, is convenient for processing, and is beneficial to reducing the cost of the power transmission mechanism.

[0050] Based on the above design concept, an exemplary structure of the lubrication structure of the power transmission mechanism in this embodiment is as shown in Figures 1 to 3 shown. In terms of the overall structure, the lubrication structure of the power transmission mechanism in this embodiment is provided on the housing 1 of the power transmission mechanism. The housing 1 mentioned here can refer to, for example, the structure of the housing 1 of an existing gearbox.

[0051] In this embodiment, a first cavity 101 and a second cavity 102 are constructed in the housing 1, the first cavity 101 and the second cavity 102 are separated by a partition 103, and the first cavity 101 is used to accommodate the clutch 2, and the second cavity 102 is used to accommodate the power output unit 3 of the power transmission mechanism. The aforementioned lubrication structure specifically includes a first connecting portion 1031 provided on the partition 103, and a guide member 4 provided in the second cavity 102.

[0052] Among them, by providing the first connecting portion 1031, the lubricating oil in the first cavity 101 can flow into the second cavity 102 through the first connecting portion 1031, thereby making the lubrication structure simple. The first connecting portion 1031 is specifically an opening provided on the partition 103, which is convenient to process. The aforementioned guide member 4 is used to guide the lubricating oil entering the second cavity 102 from the first cavity 101 through the first connecting portion 1031 to flow to the power output unit 3, so that the lubricating oil in the first cavity 101 can enter the second cavity 102, so as to facilitate lubrication of the power output unit 3.

[0053] In order to facilitate lubrication of the power output unit 3, as a preferred embodiment, the second cavity 102 includes a connecting installation cavity 1021 and a receiving cavity 1022, and the power output unit 3 includes an output shaft, a bearing 301 and an oil seal 302 sleeved on the output shaft, and a differential 303 drivingly connected to the output shaft, and the bearing 301 and the oil seal 302 are installed in the installation cavity 1021, and the differential 303 is accommodated in the receiving cavity 1022. It should be noted that the specific structures of the installation cavity 1021, the receiving cavity 1022 and the power output unit 3 can all refer to the existing structure.

[0054] In a preferred embodiment, the guide member 4 of this embodiment is disposed in the accommodating cavity 1022, and the guide member 4 includes a first guide member 401 and a second guide member 402. The first guide member 401 is used to guide the lubricating oil to flow to the bearing 301 and the oil seal 302, and the second guide member 402 is used to guide the lubricating oil to flow to the differential 303.

[0055] In this way, while the first guide member 401 is provided for the bearing 301 and the oil seal 302, the second guide member 402 is provided for the differential 303, so that the bearing 301, the oil seal 302 and the differential 303 can be lubricated at the same time, making the overall structure simpler.

[0056] In order to facilitate the lubricating oil in the first cavity 101 to flow into the second cavity 102, as a preferred embodiment, Figure 3 As shown in FIG. 1 , on the cross section of the housing 1 , the first connecting portion 1031 is located on a line connecting the center of the first cavity 101 and the center of the second cavity 102 .

[0057] Specifically, since the first cavity 101 is located to the left and above the second cavity 102, in the height direction of the vehicle, relative to the middle position of the first cavity 101 in the height direction of the vehicle, the first communication part 1031 is arranged slightly lower, facilitating the lubricating oil to enter the second cavity 102 from the first cavity 101.

[0058] The axial center line of the first cavity 101 is the axial center line of the clutch 2, and the axial center line of the second cavity 102 is the axial center line of the output shaft. On the cross-section of the housing 1, the aforementioned first communication part 1031 is located on the connection line of the two axial center lines, facilitating the flow of the lubricating oil in the first cavity 101 into the second cavity 102, and at the same time facilitating the lubrication of the bearing 301, the oil seal 302 and the differential 303.

[0059] To achieve a better lubrication effect, as a preferred implementation manner, the first guiding member 401 and the second guiding member 402 are arranged vertically, so that the oil fluid entering the second cavity 102 can be better utilized. Specifically, arranging the first guiding member 401 and the second guiding member 402 vertically can not only make full use of the space, but also divide the oil fluid, enabling targeted lubrication of the bearing 301, the oil seal 302 and the differential 303 respectively, and achieving a better lubrication effect.

[0060] To facilitate the simultaneous lubrication of the bearing 301 and the oil seal 302, as a preferred implementation manner, a second communication part 10211 is provided on the upper part of the side wall of the installation cavity 1021, and the first guiding member 401 is used to guide the lubricating oil to flow to the bearing 301 and the oil seal 302 after flowing through the second communication part 10211.

[0061] In the above structure, by providing the second communication part 10211 on the upper part of the side wall of the installation cavity 1021 and enabling the first guiding member 401 to guide the lubricating oil to flow to the bearing 301 and the oil seal 302 through the second communication part 10211, the overall structure is made simpler, facilitating the overall layout, and achieving a better lubrication effect on the bearing 301 and the oil seal 302.

[0062] From Figure 2 Combined with Figure 5 And Figure 6 As shown in, as a preferred implementation manner, the first guiding member 401 includes a guiding main body 4011 having a guiding groove, and a first mounting part 4012 and a second mounting part 4013 arranged near both ends of the guiding main body 4011. The guiding main body 4011 is mounted in the accommodating cavity 1022 through the first mounting part 4012 and the second mounting part 4013.

[0063] Specifically in terms of structure, the cross-section of the guiding main body 4011 is "U"-shaped, and the notch of the guiding groove is arranged upward. One end of the guiding groove faces the first communication part 1031, and the other end of the guiding groove faces the second communication part 10211.

[0064] With such an arrangement, the oil entering the second cavity 102 can flow towards the second communication part 10211 under the guidance of the guiding groove, and can reach above the bearing 301 and the oil seal 302 through the second communication part 10211, which is convenient for lubricating the bearing 301 and the oil seal 302 and has a good lubrication effect.

[0065] In actual arrangement, in order to facilitate the smooth flow of the lubricating oil, as a whole, the guiding main body 4011 is arc-shaped, so that the guiding groove is arc-shaped. In this way, the flow resistance of the lubricating oil is small, and it is convenient to guide the oil from the first communication part 1031 to the second communication part 10211.

[0066] In the above structure, the first guiding member 401 includes a guiding main body 4011, a first mounting part 4012 and a second mounting part 4013, and the guiding main body 4011 is mounted in the accommodating cavity 1022 through the first mounting part 4012 and the second mounting part 4013. Since the first mounting part 4012 and the second mounting part 4013 are arranged near both ends of the guiding main body 4011, the fixing stability and reliability of the first guiding member 401 can be improved. The notch of the guiding groove faces upward, and both ends are respectively communicated with the first communication part 1031 and the second communication part 10211. The structure is simple, and when the housing 1 is processed and formed, there is no need to form the first guiding member 401, which is convenient for processing.

[0067] More specifically, referring to Figure 4 and Figure 5 as shown, the first mounting part 4012 includes a mounting plate in an "L" shape, which specifically includes a transverse plate and a longitudinal plate connected together. The end of the transverse plate far from the longitudinal plate is connected to the guiding main body 4011. A through hole 40121 is provided on the longitudinal plate, and the longitudinal plate can be screwed to the housing 1 through a connecting member such as a screw 40122 passing through the through hole 40121, which is beneficial to mounting the first guiding member 401 in the accommodating cavity 1022 and is convenient for disassembly and assembly.

[0068] The second mounting part 4013 specifically includes an extension plate extending outward from the guiding main body 4011. A positioning post 40131 is provided on the extension plate, and a positioning hole is provided on the housing 1. The second mounting part 4013 can be inserted into the positioning hole through the positioning post 40131.

[0069] In order to improve the reliability of the insertion, a plurality of ribs are provided on the outer peripheral wall of the positioning post 40131. Each rib is wedge-shaped, and the small-diameter end is arranged away from the extension plate. The plurality of ribs are arranged at intervals on the outer peripheral wall of the positioning post 40131. In this way, it is beneficial to improve the reliability of the insertion of the positioning post 40131 into the positioning hole.

[0070] As Figure 2 shown in the figure, in order to facilitate the arrangement of the positioning holes, near the second communication part 10211, a part of the side wall of the installation cavity 1021 bulges upward locally, and the positioning holes are arranged at this protruding position, which is convenient for arranging the first guiding member 401.

[0071] In order to improve the structural strength of the first guiding member 401, as a preferred embodiment, a first reinforcing rib 4014 is provided between the guiding main body 4011 and the first mounting part 4012. Specifically, the first reinforcing rib 4014 is arranged between the aforementioned cross plate and the guiding main body 4011.

[0072] Meanwhile, as a preferred embodiment, a second reinforcing rib 4015 is provided between the guiding main body 4011 and the second mounting part 4013. Specifically in this embodiment, the second reinforcing rib 4015 is connected between the guiding main body 4011 and the aforementioned extension plate.

[0073] In the above structure, by providing the first reinforcing rib 4014 and the second reinforcing rib 4015, the structural strength of the first guiding member 401 itself can be better improved, which is beneficial to improving the application reliability of the first guiding member 401.

[0074] As a preferred embodiment, still referring to Figure 2 shown in the figure, the second communication part 10211 includes a notch provided at the upper part of the side wall of the installation cavity 1021, which makes the processing of the housing 1 more convenient.

[0075] Continuing to refer to Figure 2 shown in the figure, as a preferred embodiment, the second guiding member 402 includes a guiding plate provided in the accommodating cavity 1022. The guiding plate is connected between the partition plate 103 and the end side wall of the installation cavity 1021, and the guiding plate is generally triangular. Its lower edge located slightly below the lower edge of the first communication part 1031 can conveniently lead the lubricating oil to the differential 303, and has a good effect of strengthening the structural strength of the connecting part between the partition plate 103 and the end side wall of the installation cavity 1021.

[0076] In this embodiment, the second guiding member 402 is set as a guiding plate, which can be integrally formed with the housing 1, also makes the processing of the housing 1 convenient, and is convenient for guiding the lubricating oil to the upper part of the differential 303. In Figure 2 the state shown in the figure, the second guiding member 402 is located at the upper left of the differential 303, so that the oil flow direction is directly above the differential 303, which can better lubricate the differential 303.

[0077] Finally, it should be supplemented that the first guiding member 401 in this embodiment is preferably made of plastic material. With this setting, it has a lighter weight, lower processing cost, and makes the processing of the housing 1 convenient.

[0078] The lubrication structure of this embodiment is configured by providing a communication part on the partition plate 103 inside the housing 1 and arranging a guiding member 4 inside the second cavity 102. It has a simple structure, occupies a small space, is convenient for processing, has a relatively low processing cost, and can lubricate the clutch 2 and the power output unit 3 well.

[0079] Embodiment 2

[0080] This embodiment relates to a speed change device, which includes a housing 1 and a power transmission mechanism arranged inside the housing 1, and the housing 1 is provided with a lubrication structure of the power transmission mechanism as in Embodiment 1.

[0081] In addition, this embodiment also relates to a vehicle, which is provided with the above speed change device.

[0082] For the vehicle and the speed change device of this embodiment, by applying the lubrication structure of the power transmission mechanism as above, they can utilize the advantages of the lubrication structure of the power transmission mechanism, such as simple structure, small occupied space, convenient processing, and relatively low processing cost, to reduce the processing cost of the vehicle and the speed change device.

[0083] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lubrication structure for a power transmission mechanism, arranged on a housing (1) of the power transmission mechanism, characterized in that: The housing (1) is provided with a first cavity (101) and a second cavity (102), the first cavity (101) and the second cavity (102) being separated by a partition (103), and the first cavity (101) is used to accommodate the clutch (2), and the second cavity (102) is used to accommodate the power output unit (3) of the power transmission mechanism; The lubrication structure comprises a first connecting portion (1031) arranged on the partition (103), and a guide member (4) arranged in the second cavity (102), wherein the guide member (4) is used to guide the lubricating oil entering the second cavity (102) from the first cavity (101) through the first connecting portion (1031) to flow to the power output unit (3).

2. The lubrication structure of the power transmission mechanism according to claim 1, characterized in that: The second cavity (102) comprises a mounting cavity (1021) and a receiving cavity (1022) which are connected to each other; the output unit comprises an output shaft, a bearing (301) and an oil seal (302) sleeved on the output shaft, and a differential (303) drivingly connected to the output shaft; the bearing (301) and the oil seal (302) are mounted in the mounting cavity (1021), and the differential (303) is received in the receiving cavity (1022); The guide member (4) is arranged in the accommodating cavity (1022), and comprises a first guide member (401) and a second guide member (402), wherein the first guide member (401) is used to guide the lubricating oil to flow toward the bearing (301) and the oil seal (302), and the second guide member (402) is used to guide the lubricating oil to flow toward the differential (303).

3. The lubrication structure of the power transmission mechanism according to claim 2, characterized in that: In a cross section of the housing (1), the first connecting portion (1031) is located on a line connecting the center of the first cavity (101) and the center of the second cavity (102); and / or, The first guide member (401) and the second guide member (402) are arranged up and down.

4. The lubrication structure of the power transmission mechanism according to claim 2, characterized in that: A second connecting portion (10211) is provided on the upper portion of the side wall of the installation cavity (1021), and the first guide member (401) is used to guide the lubricating oil to flow through the second connecting portion (10211) and then flow to the bearing (301) and the oil seal (302).

5. The lubrication structure of the power transmission mechanism according to claim 4, characterized in that: The first guide member (401) comprises a guide body (4011) having a guide groove, and a first mounting portion (4012) and a second mounting portion (4013) arranged near two ends of the guide body (4011), and the guide body (4011) is mounted in the accommodating cavity (1022) via the first mounting portion (4012) and the second mounting portion (4013); The notch of the guide groove is arranged upward, and one end of the guide groove faces the first connecting portion (1031), and the other end of the guide groove faces the second connecting portion (10211).

6. The lubrication structure of the power transmission mechanism according to claim 5, characterized in that: A first reinforcing rib (4014) is provided between the guide body (4011) and the first mounting portion (4012); and / or, A second reinforcing rib (4015) is provided between the guide body (4011) and the second mounting portion (4013).

7. The lubrication structure of the power transmission mechanism according to claim 4, characterized in that: The second connecting portion (10211) comprises a notch provided on the upper portion of the side wall of the installation cavity (1021).

8. The lubrication structure of the power transmission mechanism according to any one of claims 2 to 7, characterized in that: The second guide member (402) comprises a guide plate disposed in the accommodating cavity (1022), and the guide plate is connected between the partition plate (103) and the end side wall of the installation cavity (1021).

9. A speed change device, characterized in that: It comprises a housing (1) and a power transmission mechanism arranged in the housing (1); The housing (1) is provided with a lubrication structure of the power transmission mechanism according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle is provided with the transmission device as claimed in claim 9.

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