Oil storage device, speed reducer, power assembly and vehicle

Abstract

The utility model relates to an oil storage device, a speed reducer, a power assembly and a vehicle, and the oil storage device comprises a shell which is provided with a containing cavity used for allowing a gear assembly to be rotatably installed therein; the oil storage area is used for storing lubricating oil and containing part of the gear assembly, the oil collecting structure is connected with the cavity wall of the containing cavity and located above the oil storage area, an oil collecting groove is formed in the oil collecting structure, and a groove opening of the oil collecting groove deviates from the oil storage area and is configured to allow the lubricating oil thrown out by the gear assembly to flow in and out of the oil collecting groove. The oil storage device is used for being matched with a gear assembly to work together, the oil storage device can collect lubricating oil thrown out by the gear assembly through the oil collecting structure and store the lubricating oil in the oil collecting groove, and the lubricating oil flows back to the oil storage area until the oil collecting groove is filled with the lubricating oil and overflows, so that the amount of the lubricating oil in the oil storage area is reduced; and the resistance of the lubricating oil to the rotation of the gear assembly is reduced, so that the oil stirring loss is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical structures, in particular to an oil storage device, a reducer, a power assembly and a vehicle. BACKGROUND

[0002] The cruising range is one of the key performance indicators of an electric vehicle. Under the condition that the battery pack capacity is the same, the higher the efficiency of the transmission component, the longer the cruising range of the vehicle. Therefore, improving the transmission efficiency of the vehicle system to extend the cruising range of the vehicle has always been a concern. The reducer is one of the core transmission components of the vehicle, and its efficiency directly affects the mileage of the vehicle. The reducer plays a role in reducing speed and increasing torque in the transmission link. The smaller the loss in the transmission process, the higher the efficiency. The efficiency loss of the reducer mainly includes oil stirring loss and friction loss (including gear meshing friction and bearing friction), and the oil stirring loss accounts for a large proportion. How to reduce the oil stirring loss of the reducer in the transmission process has become a focus of attention. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide an oil storage device, a reducer, a power assembly and a vehicle to at least partially solve the above technical problems.

[0004] In order to achieve the above purpose, according to the first aspect of the present application, an oil storage device is provided, comprising:

[0005] a housing having a containing cavity for rotatably mounting a gear assembly therein; a part of the containing cavity is formed as an oil storage area for storing lubricating oil and accommodating part of the gear assembly, and

[0006] a oil collecting structure connected with a cavity wall of the containing cavity and located above the oil storage area, the oil collecting structure is formed with an oil collecting groove, the groove opening of the oil collecting groove faces away from the oil storage area and is configured to flow in and out of the oil collecting groove for the lubricating oil thrown out by the gear assembly.

[0007] Optionally, an oil outlet is formed on the housing and communicates with the containing cavity, the oil outlet corresponds to the oil storage area and is configured to communicate with a suction member.

[0008] Optionally, an oil inlet is further formed on the housing and communicates with the containing cavity, the position of the oil inlet is away from the oil storage area and is configured to supply lubricating oil to the gear assembly.

[0009] Optionally, an oil passage is further formed on the housing and is isolated from the containing cavity, the oil passage communicates the oil outlet and the oil inlet, and the oil passage is configured to communicate with the suction member so that the lubricating oil flows from the oil outlet to the oil inlet through the oil passage and flows back into the containing cavity.

[0010] Optionally, the oil collection structure and the oil outlet are located on the same side of the housing, or the oil collection structure and the oil outlet are diagonally arranged.

[0011] Optionally, the cavity wall of the accommodating cavity comprises a bottom wall close to the oil storage area, a top wall opposite to the bottom wall, and a side wall between the bottom wall and the top wall, one end of the oil collection structure being connected with the side wall.

[0012] Optionally, the number of the oil collection structures is multiple, and the multiple oil collection structures are sequentially arranged in a direction away from the oil storage area.

[0013] Optionally, in the direction away from the oil storage area, the length of each oil collection structure protruding from the side wall sequentially decreases.

[0014] Optionally, in the horizontal state of the oil storage device, the included angle between the plane where the notch is located and the horizontal plane is-15°-15°.

[0015] Optionally, the oil collection structure comprises a bottom plate and a side plate, the side plate being arranged on the bottom plate and defining the oil collection groove together with the bottom plate.

[0016] Optionally, the side plate is connected with the cavity wall of the accommodating cavity.

[0017] Optionally, in the depth direction of the oil collection groove from the bottom wall of the oil collection groove to the notch, the radial dimension of the oil collection groove gradually increases.

[0018] Optionally, the depth of the oil collection groove is less than any one of the length and the width of the oil collection groove.

[0019] Optionally, a flow guide rib is further protruded on the housing, the flow guide rib being away from the oil storage area and being configured to be located on the circumferential side of the gear assembly.

[0020] Optionally, the flow guide rib is further configured to extend between the gear assembly and the oil collection structure, and a flow passage is further provided on the flow guide rib.

[0021] Optionally, an air vent is further provided on the housing and communicates with the accommodating cavity, the air vent being located away from the oil storage area.

[0022] Optionally, the housing comprises a front housing and a rear housing, the front housing and the rear housing being connected with each other and defining the accommodating cavity.

[0023] Optionally, the oil collection structure is connected with the front housing.

[0024] Optionally, the oil outlet and the oil inlet are provided on the front housing.

[0025] According to a second aspect of the present application, there is provided a speed reducer comprising a gear assembly rotatably arranged in the accommodating cavity and partially extending into the oil storage area, and the oil storage device as described above.

[0026] Optionally, when the oil outlet is formed on the housing, the speed reducer further comprises a suction member in communication with the oil outlet and configured to suck the lubricating oil in the oil storage area out of the accommodating cavity through the oil outlet.

[0027] Optionally, the gear assembly comprises a first rotating shaft, a second rotating shaft and a first gear, the first rotating shaft and the second rotating shaft are rotatably arranged on the housing and spaced apart from each other, the first rotating shaft is provided with a spline portion, and the first gear is arranged on the second rotating shaft and engaged with the spline portion.

[0028] Optionally, the oil inlet comprises a first oil inlet, the first oil inlet is arranged close to the first gear and the spline portion and configured to supply lubricating oil to the first gear and the spline portion.

[0029] Optionally, the gear assembly further comprises a first bearing, the first bearing is sleeved on the second rotating shaft and connected with the housing, and the oil inlet further comprises a second oil inlet, the second oil inlet is arranged close to the first bearing and configured to supply lubricating oil to the first bearing.

[0030] Optionally, the gear assembly further comprises a second gear, a third gear and a third rotating shaft, the second gear is arranged on the second rotating shaft, the third rotating shaft is rotatably arranged on the housing, the third gear is arranged on the third rotating shaft and engaged with the second gear, and part of the third gear extends into the oil storage area.

[0031] Optionally, the gear assembly further comprises a second bearing, the second bearing is sleeved on the third rotating shaft and connected with the housing, and the oil inlet further comprises a third oil inlet, the third oil inlet is arranged close to the second bearing and configured to supply lubricating oil to the second bearing.

[0032] Optionally, the first gear has more teeth than the spline portion, the radius of the first gear is greater than the radius of the second gear, the second gear has less teeth than the third gear, and the radius of the third gear is greater than the radius of the spline portion.

[0033] Optionally, the speed reducer further comprises a driving member connected with the first rotating shaft and configured to drive the first rotating shaft to rotate.

[0034] Optionally, the speed reducer comprises a coaxial speed reducer.

[0035] According to a third aspect of the present application, there is also provided a power assembly comprising an electric machine and a speed reducer as described above, the electric machine being connected with the speed reducer.

[0036] According to a fourth aspect of the present application, there is also provided a vehicle comprising a speed reducer as described above or a power assembly as described above.

[0037] The oil storage device provided in the embodiments of the present application can be used in cooperation with a gear assembly. When the oil storage device is in a horizontal state, lubricating oil is stored in an oil storage area of a containing cavity. The gear assembly is rotatably arranged in the containing cavity and partially extends into the oil storage area to contact the lubricating oil in the oil storage area. When the gear assembly rotates, part of the lubricating oil in the oil storage area is taken away by the gear assembly and is thrown out by centrifugal force. The oil collecting structure in the containing cavity can collect the lubricating oil thrown out by the gear assembly and store the lubricating oil in the oil collecting groove until the oil collecting groove is filled with the lubricating oil to generate overflow, and then the lubricating oil flows back to the oil storage area. That is, part of the lubricating oil in the oil storage area is transferred and stably stored in the oil collecting groove. In this way, the amount of the lubricating oil in the oil storage area is reduced, and the resistance generated by the lubricating oil to the rotation of the gear assembly is reduced, so that the oil stirring loss is reduced.

[0038] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0040] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0041] Figure 1 is a cross-sectional view of an assembly structure of an oil storage device and a gear assembly provided in an exemplary embodiment of the present application;

[0042] Figure 2 is a structural schematic view of the oil storage device in different states, wherein (a) shows a structural schematic view of the oil storage device in a horizontal state, (b) shows a structural schematic view of the oil storage device in one inclined state, and (c) shows a structural schematic view of the oil storage device in another inclined state;

[0043] Figure 3 is an exploded structural schematic view of a speed reducer provided in an exemplary embodiment of the present application;

[0044] Figure 4 is a perspective structural schematic view of a front housing in Figure 3 ;

[0045] Figure 5 is a front structural schematic view of a front housing in Figure 3 ;

[0046] Figure 6 is an assembly structural schematic view of a front housing and a gear assembly in Figure 3 ;

[0047] Figure 7 is a side structural schematic view of a gear assembly in Figure 3 ;

[0048] Figure 8 is a structural schematic view of a speed reducer provided in an example embodiment of the present application;

[0049] Figure 9 is a structural schematic view of a power assembly provided in an example embodiment of the present application;

[0050] Figure 10 is a structural schematic view of a vehicle provided in an example embodiment of the present application Figure 1 ;

[0051] Figure 11 is a structural schematic view of a vehicle provided in an example embodiment of the present application Figure 2 .

[0052] BRIEF DESCRIPTION OF THE DRAWINGS

[0053] 1, oil storage device;

[0054] 11, housing; 111, front housing; 1111, first mounting portion; 1112, second mounting portion; 1113, third mounting portion; 112, rear housing;

[0055] 101, accommodating cavity; 1011, oil storage area; 1012, mounting area; 1013, cavity wall; 1013a, bottom wall; 1013b, top wall; 1013c, side wall;

[0056] 102, oil outlet;

[0057] 103, oil inlet; 1031, first oil inlet; 1032, second oil inlet; 1033, third oil inlet;

[0058] 104, air vent;

[0059] 113, flow guide rib; 1131, flow passage hole;

[0060] 12, oil collection structure; 121, oil collection groove; 1211, groove opening; 122, bottom plate; 123, side plate;

[0061] 13, oil passage;

[0062] 10, speed reducer;

[0063] 2, gear assembly;

[0064] 21, first rotating shaft; 211, spline portion; 22, second rotating shaft; 23, first gear; 24, second gear; 25, third gear; 26, third rotating shaft; 27, first bearing; 28, second bearing;

[0065] 3, suction member;

[0066] 4, driving member;

[0067] 100, power assembly; 20, motor;

[0068] 1000, vehicle. DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative effort fall within the protection scope of the present application.

[0070] According to a first aspect of the present application, referring to Figures 1 to 8 The present application provides an oil storage device 1, which comprises a housing 11 and an oil collection structure 12. The housing 11 has a receiving cavity 101 for rotatably mounting a gear assembly 2 therein; a part of the receiving cavity 101 is formed as an oil storage area 1011 for storing lubricating oil and accommodating part of the gear assembly 2. The oil collection structure 12 is connected with a cavity wall 1013 of the receiving cavity 101, and the oil collection structure 12 is located above the oil storage area 1011. The oil collection structure 12 is formed with an oil collection groove 121, and a groove opening 1211 of the oil collection groove 121 faces away from the oil storage area 1011, and the groove opening 1211 is configured to allow the lubricating oil thrown out by the gear assembly 2 to flow into and out of the oil collection groove 121.

[0071] The oil storage device 1 is a structure for loading and storing lubricating oil. The oil storage device 1 can be used in a vehicle 1000, specifically in a speed reducer 10 on the vehicle 1000.

[0072] The oil storage device 1 comprises a housing 11, and the housing 11 has a containing cavity 101, which is a cavity opened in the interior of the housing 11, and the housing 11 is formed as a cavity wall 1013 of the containing cavity 101.

[0073] The containing cavity 101 is used for containing the gear assembly 2, and specifically, the gear assembly 2 is rotatably installed in the containing cavity 101, so that the gear assembly 2 can rotate in the containing cavity 101, for example, can rotate in the clockwise direction or in the counterclockwise direction.

[0074] Part of the containing cavity 101 is formed as an oil storage area 1011. As an example, referring to Figure 1 , the containing cavity 101 is divided into the oil storage area 1011 and a mounting area 1012, and the oil storage area 1011 and the mounting area 1012 are distributed in an up-down manner. When the oil storage device 1 is in a horizontal state, i.e., a state in which the oil storage device 1 is placed on a horizontal plane S and normally works, the oil storage area 1011 is below the mounting area 1012, the mounting area 1012 is above the oil storage area 1011, and the oil storage area 1011 is closer to the ground than the mounting area 1012, so that the lubricating oil in the containing cavity 101 can automatically flow to the oil storage area 1011 under the action of gravity, and the oil storage area 1011 is used for containing and storing the lubricating oil. As an example, when the oil storage device 1 is applied to the vehicle 1000, and the vehicle 1000 is running on a flat road (i.e., in a flat road working condition), the oil storage device 1 will be in a horizontal state in this case.

[0075] The oil storage area 1011 is also used for containing part of the gear assembly 2. As an example, part of the gear assembly 2 is accommodated in the mounting area 1012, and the other part is accommodated in the oil storage area 1011. Since the oil storage area 1011 is also used for storing the lubricating oil, when part of the gear assembly 2 extends into the oil storage area 1011, it will contact the lubricating oil in the oil storage area 1011, and the lubricating oil can adhere to the part of the gear assembly 2 by surface tension. With the rotation of the gear assembly 2, the lubricating oil can further flow to other parts of the gear assembly 2, so as to realize lubrication of the gear assembly 2, reduce the wear of the gear assembly 2 in the rotation process, and further reduce the friction loss.

[0076] In addition, in the process of rotation of the gear assembly 2, part of the lubricating oil will also be thrown out by the gear assembly 2 under the action of centrifugal force, and splash lubrication is realized. Therefore, the containing cavity 101 is also provided with an oil collecting structure 12, which is used for collecting the lubricating oil thrown out by the gear assembly 2.

[0077] Specifically, the oil collecting structure 12 is connected with the cavity wall 1013 of the accommodating cavity 101 to prevent the oil collecting structure 12 from moving arbitrarily in the accommodating cavity 101. The oil collecting structure 12 is located above the oil storage area 1011, i.e., the oil collecting structure 12 is farther away from the ground than the oil storage area 1011 when the oil storage device 1 is in the horizontal state, for example, the oil collecting structure 12 is arranged in the mounting area 1012 and spaced apart from the oil storage area 1011. The oil collecting structure 12 is formed with an oil collecting groove 121, and the oil collecting groove 121 has a groove opening 1211 facing away from the oil storage area 1011, i.e., the groove opening 1211 is located on the side of the oil collecting structure 12 facing away from the oil storage area 1011. In addition, the groove opening 1211 is configured to allow the lubricating oil thrown out by the gear assembly 2 to flow into and out of the oil collecting groove 121, that is, the groove opening 1211 is both the inlet and the outlet of the oil collecting groove 121. In this way, when the oil storage device 1 is in the horizontal state, the lubricating oil thrown out by the gear assembly 2 can enter the oil collecting groove 121 through the groove opening 1211, the oil collecting groove 121 stores the collected lubricating oil, and the lubricating oil will overflow out of the oil collecting groove 121 through the groove opening 1211 only after the oil collecting groove 121 is filled with lubricating oil. Since the oil collecting structure 12 is located above the oil storage area 1011, after the lubricating oil flows out of the oil collecting groove 121, it will flow back to the oil storage area 1011 under the action of gravity, thereby completing the dynamic circulation process of the lubricating oil in the accommodating cavity 101.

[0078] Please continue to see Figure 1 When the oil storage area 1011 stores lubricating oil, the oil storage device 1 will be in a horizontal state, and the liquid level (as shown by the dashed line L2 in Figure 1 ) of the lubricating oil in the oil storage area 1011 is usually not higher than the boundary line (as shown by the dashed line L1 in Figure 1 ) between the oil storage area 1011 and the mounting area 1012. It can be understood that the more lubricating oil stored in the oil storage area 1011, the closer the liquid level of the lubricating oil in the oil storage area 1011 to the boundary line between the oil storage area 1011 and the mounting area 1012, i.e., the closer the dashed line L2 to the dashed line L1. Part of the gear assembly 2 extends into the oil storage area 1011 and contacts the lubricating oil, and when the gear assembly 2 rotates, it will form agitation with the lubricating oil in the oil storage area 1011 and hinder the rotation of the gear assembly 2, thereby causing oil stirring loss. Generally, the more the amount of lubricating oil in the oil storage area 1011, the greater the oil stirring loss.

[0079] To this end, the oil storage device 1 provided by the embodiment of the present application can be used in cooperation with the gear assembly 2. When the oil storage device 1 is in a horizontal state, lubricating oil is stored in the oil storage area 1011 of the containing cavity 101, and the gear assembly 2 is rotatably arranged in the containing cavity 101 and partially extends into the oil storage area 1011 to contact the lubricating oil in the oil storage area 1011. When the gear assembly 2 rotates, the gear assembly 2 will take away part of the lubricating oil in the oil storage area 1011 and throw the part of the lubricating oil out by centrifugal force. The oil collecting structure 12 in the containing cavity 101 can collect the lubricating oil thrown out by the gear assembly 2 and store the lubricating oil in the oil collecting groove 121 until the oil collecting groove 121 is filled with the lubricating oil to generate overflow, and then the lubricating oil flows back to the oil storage area 1011. That is, part of the lubricating oil in the oil storage area 1011 is transferred and stably stored in the oil collecting groove 121. In this way, the amount of lubricating oil in the oil storage area 1011 is reduced, and the resistance of the lubricating oil to the rotation of the gear assembly 2 is reduced, so that the oil stirring loss is reduced.

[0080] In some embodiments, referring to Figures 3 to 5 , the shell 11 is provided with an oil outlet 102, the oil outlet 102 is in communication with the containing cavity 101, the oil outlet 102 corresponds to the oil storage area 1011, and the oil outlet 102 is configured to be in communication with the suction member 3.

[0081] That is, the lubricating oil in the oil storage area 1011 can also flow out of the oil storage area 1011 through the oil outlet 102. Specifically, the oil outlet 102 is configured to be in communication with the suction member 3, the suction action of the suction member 3 can be used to form a negative pressure at the position of the oil outlet 102, the lubricating oil in the oil storage area 1011 flows to the oil outlet 102 under the action of the negative pressure, and then flows out of the containing cavity 101 through the oil outlet 102.

[0082] Since the oil storage device 1 is not always in a horizontal state during actual use, the oil storage device 1 can also be in an inclined state. Here, the inclined state is another state different from the horizontal state.

[0083] Referring to Figure 2When the oil storage device 1 is in the horizontal state, the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is 90°, and when the oil storage device 1 is in the inclined state, the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is greater than or less than 90°. As an example, when the oil storage device 1 is applied to the vehicle 1000, and the vehicle 1000 is running on an uphill road (i.e., in an uphill working condition), in this case, the oil storage device 1 will be in an inclined state, and the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is greater than 90°. As an example, when the oil storage device 1 is applied to the vehicle 1000, and the vehicle 1000 is running on a downhill road (i.e., in a downhill working condition), in this case, the oil storage device 1 will be in an inclined state, and the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is less than 90°.

[0084] For ease of distinction, when the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is greater than 90°, the inclined state of the oil storage device 1 is referred to as a first inclined state, and when the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is less than 90°, the inclined state of the oil storage device 1 is referred to as a second inclined state.

[0085] Optionally, when the oil storage device 1 is in the first inclined state, the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is greater than 90° and less than 180°. Optionally, when the oil storage device 1 is in the first inclined state, the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is greater than 90° and less than 135°.

[0086] Optionally, when the oil storage device 1 is in the second inclined state, the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is greater than 0° and less than 90°. Optionally, when the oil storage device 1 is in the second inclined state, the angle θ between the center line L3 of the oil storage device 1 and the horizontal plane S is greater than 45° and less than 90°.

[0087] However, when the oil storage device 1 is in the inclined state, the lubricating oil will flow to the low position of the oil storage area 1011 under the action of gravity, although the liquid surface (as shown by the dashed line L2) of the lubricating oil in the oil storage area 1011 still maintains a parallel relationship with the horizontal plane S, the position between the liquid surface of the lubricating oil in the oil storage area 1011 and the oil outlet 102 corresponding to the oil storage area 1011 will change, and the risk of the oil outlet 102 exposing the liquid surface of the lubricating oil in the oil storage area 1011 will increase, thereby increasing the risk of the suction member 3 being empty suction.

[0088] As an example, please refer to Figure 2When the oil outlet 102 is arranged on the left side of the center line L3 of the oil storage device 1, for example, on the region shown as M1 in the figure, the risk of the oil outlet 102 exposing the liquid level of the lubricating oil in the oil storage area 1011 increases when the oil storage device 1 is in the first inclined state; when the oil outlet 102 is arranged on the right side of the center line L3 of the oil storage device 1, for example, on the region shown as M2 in the figure, the risk of the oil outlet 102 exposing the liquid level of the lubricating oil in the oil storage area 1011 increases when the oil storage device 1 is in the second inclined state.

[0089] In related technologies, in order to reduce the risk of the oil outlet 102 exposing the liquid level of the lubricating oil in the oil storage area 1011 when the oil storage device 1 is in an inclined state, which causes the suction member 3 to be empty, the amount of lubricating oil in the containing cavity 101 is usually increased. However, this will increase the resistance of the gear assembly 2 to rotate when the oil storage device 1 is in a horizontal state, and increase the oil stirring loss.

[0090] In the embodiments of the present application, thanks to the arrangement of the oil collection structure 12, the oil collection structure 12 can dynamically adjust the amount of lubricating oil in the oil storage area 1011 according to the state of the oil storage device 1, thereby reducing the risk of the oil outlet 102 exposing the liquid level of the lubricating oil in the oil storage area 1011 when the oil storage device 1 is in an inclined state, and making the oil stirring loss of the oil storage device 1 in a horizontal state lower.

[0091] In addition, even if redundant lubricating oil is added in the oil storage area 1011, the oil stirring loss of the oil storage device 1 in a horizontal state can be close to the oil stirring loss before the redundant lubricating oil is added.

[0092] Specifically, in order to reduce the risk that the oil outlet 102 exposes the liquid level of the lubricating oil in the oil storage area 1011 and causes the suction member 3 to be empty, a volume V2 of lubricating oil can be pre-filled in the oil storage area 1011 (at this time, the total amount of lubricating oil in the oil storage area 1011 is V1+V2, and the volume V2 of lubricating oil that is filled can be referred to as redundant lubricating oil), and when the gear assembly 2 starts to rotate, the additional volume V2 of lubricating oil can be transferred to the oil collection groove 121 of the oil collection structure 12. When the oil storage device 1 is in a horizontal state, the volume V2 of lubricating oil can be stably stored in the oil collection groove 121, at this time, the amount of lubricating oil in the oil storage area 1011 is only V1, so that the resistance of the gear assembly 2 to rotate can be kept at a relatively low level, thereby inhibiting the increase of oil stirring loss; and when the oil storage device 1 is in an inclined state, the volume V2 of lubricating oil stored in the oil collection groove 121 can at least partially flow out of the oil collection groove 121 through the slot 1211 and flow back to the oil storage area 1011 under the action of gravity, so that the amount of lubricating oil in the oil storage area 1011 increases, the liquid level of the lubricating oil in the oil storage area 1011 rises, and the risk that the oil outlet 102 exposes the liquid level of the lubricating oil in the oil storage area 1011; the liquid level of the lubricating oil stored in the oil collection groove 121 (as shown by the dashed line L4) also changes relative to the oil collection groove 121. When the oil storage device 1 returns to the horizontal state again, part of the lubricating oil can be transferred to the oil collection groove 121 by the gear assembly 2, so that the amount of lubricating oil in the oil storage area 1011 decreases, and the liquid level of the lubricating oil in the oil storage area 1011 decreases.

[0093] In some embodiments, referring to Figures 3 to 5 , the housing 11 is further provided with an oil inlet 103, the oil inlet 103 is in communication with the containing cavity 101, the position of the oil inlet 103 is away from the oil storage area 1011, and the oil inlet 103 is configured to supply lubricating oil to the gear assembly 2.

[0094] Here, the number of oil inlets 103 can be one or more. The position of the oil inlet 103 is away from the oil storage area 1011, for example, the position of the oil inlet 103 corresponds to the mounting area 1012.

[0095] Through the above arrangement, the oil inlet 103 can supplement the lubricating oil in the containing cavity 101 to ensure the amount of lubricating oil, and after the lubricating oil enters the containing cavity 101 through the oil inlet 103, active lubrication can be achieved for each friction pair of the gear assembly 2, thereby improving the lubrication effect of the gear assembly 2, reducing the risk of wear of the gear assembly 2, and thereby reducing the friction loss.

[0096] In addition, when the lubricating oil is actively applied to the gear assembly 2, the rotation of the gear assembly 2 can further be collected by the oil collection structure 12.

[0097] As a possible implementation, the oil inlet 103 is connected with a separate lubricating oil source (not shown in the figure), and the lubricating oil in the lubricating oil source can be supplied to the gear assembly 2 through the oil inlet 103.

[0098] In some embodiments, a nozzle (not shown in the figure) is further formed on the shell 11 and located in the accommodating cavity 101, and the nozzle is in communication with the oil inlet 103. The nozzle can be used to spray or jet the lubricating oil onto the gear assembly 2, so as to improve the dispersion effect of the lubricating oil on the gear assembly 2 and further reduce the wear. Of course, in other embodiments, the lubricating oil can also be sprayed or jetted onto the gear assembly 2 by adjusting the opening size of the oil inlet 103.

[0099] In some embodiments, referring to Figure 4 , the shell 11 further forms an oil passage 13, the oil passage 13 is isolated from the accommodating cavity 101, the oil passage 13 is in communication with the oil outlet 102 and the oil inlet 103, and the oil passage 13 is configured to be in communication with the suction member 3 so that the lubricating oil flows from the oil outlet 102 to the oil inlet 103 through the oil passage 13 and flows back into the accommodating cavity 101.

[0100] The oil passage 13 is isolated from the accommodating cavity 101, that is, the oil passage 13 and the accommodating cavity 101 have a separate cavity therebetween, and the oil passage 13 is in communication with the accommodating cavity 101 through the oil outlet 102 and the oil inlet 103 respectively. Further, by configuring the oil passage 13 to be in communication with the suction member 3, the lubricating oil in the oil storage device 1 can be circulated, that is, the lubricating oil in the accommodating cavity 101 that flows out through the oil outlet 102 can be transported to the oil inlet 103 through the oil passage 13 and flow back into the accommodating cavity 101 through the oil inlet 103.

[0101] In this way, a separate lubricating oil source can not be provided, and the gear assembly 2 can be actively lubricated by circulating the lubricating oil in the accommodating cavity 101, which is not only efficient but also simple.

[0102] As a possible implementation, the oil passage 13 is formed in the inside of the cavity wall 1013 of the accommodating cavity 101, that is, the oil passage 13 extends in the cavity wall 1013.

[0103] In some embodiments, referring to Figure 2 , the oil collecting structure 12 and the oil outlet 102 are located on the same side of the shell 11; or the oil collecting structure 12 and the oil outlet 102 are diagonally arranged.

[0104] As an example, referring to Figure 2In the (a) of FIG. 1, when the oil outlet 102 is arranged on the area shown by M2 in the figure, the oil collecting structure 12 is arranged above the oil outlet 102, and the oil collecting structure 12 and the oil outlet 102 are arranged on the same side of the housing 11. Thus, referring to the (a) of FIG. 1, when the oil storage device 1 is in the first inclined state, the oil outlet 102 is the high position of the oil storage area 1011, and the oil outlet 102 exposes the liquid level of the lubricating oil in the oil storage area 1011. Figure 2 In the (b) of FIG. 1, when the oil storage device 1 is in the second inclined state, the oil outlet 102 is the low position of the oil storage area 1011, and the oil outlet 102 is away from the liquid level of the lubricating oil in the oil storage area 1011. Thus, referring to the (b) of FIG. 1, when the oil storage device 1 is in the second inclined state, the oil outlet 102 is the low position of the oil storage area 1011, and the oil outlet 102 is away from the liquid level of the lubricating oil in the oil storage area 1011. Figure 2 In the (c) of FIG. 1, when the oil storage device 1 is in the first inclined state, the oil outlet 102 is the high position of the oil storage area 1011, and the oil outlet 102 exposes the liquid level of the lubricating oil in the oil storage area 1011.

[0105] As an example, referring to the (a) of FIG. 2, when the oil outlet 102 is arranged on the area shown by M1 in the figure, the oil collecting structure 12 and the oil outlet 102 are arranged on different sides of the housing 11, and are diagonally arranged. Thus, referring to the (a) of FIG. 2, when the oil storage device 1 is in the first inclined state, the oil outlet 102 is the high position of the oil storage area 1011, and the oil outlet 102 exposes the liquid level of the lubricating oil in the oil storage area 1011. Figure 2 In the (b) of FIG. 2, when the oil storage device 1 is in the second inclined state, the oil outlet 102 is the low position of the oil storage area 1011, and the oil outlet 102 is away from the liquid level of the lubricating oil in the oil storage area 1011. Thus, referring to the (b) of FIG. 2, when the oil storage device 1 is in the second inclined state, the oil outlet 102 is the low position of the oil storage area 1011, and the oil outlet 102 is away from the liquid level of the lubricating oil in the oil storage area 1011. Figure 2 In the (c) of FIG. 2, when the oil storage device 1 is in the first inclined state, the oil outlet 102 is the high position of the oil storage area 1011, and the oil outlet 102 exposes the liquid level of the lubricating oil in the oil storage area 1011. Figure 2

[0106] It can be known that, by arranging the oil collecting structure 12 and the oil outlet 102 on the same side of the housing 11 or diagonally arranging the oil collecting structure 12 and the oil outlet 102, the risk of the oil outlet 102 exposing the liquid level of the lubricating oil in the oil storage area 1011 can be controlled to be increased only when the oil storage device 1 is in the first inclined state or the second inclined state, so that the control difficulty can be reduced.

[0107] In some embodiments, referring to FIG. 3, the cavity wall 1013 of the accommodating cavity 101 includes a bottom wall 1013a, a top wall 1013b and a side wall 1013c. The bottom wall 1013a is close to the oil storage area 1011, the top wall 1013b is opposite to the bottom wall 1013a, and the side wall 1013c is between the bottom wall 1013a and the top wall 1013b. One end of the oil collecting structure 12 is connected with the side wall 1013c. Figures 3 to 5 By connecting the oil collecting structure 12 with the side wall 1013c, the connection mode is simple, and the difficulty of arranging the oil collecting structure 12 in the accommodating cavity 101 can be reduced. In addition, when the gear assembly 2 is installed in the accommodating cavity 101, the oil collecting structure 12 is arranged on the left side and / or the right side of the gear assembly 2, so that the oil collecting groove 121 can better receive the lubricating oil thrown by the gear assembly 2.

[0108]

[0109] ​​As an example, the side wall 1013c includes a first side wall and a second sub-side wall arranged oppositely, and one end of the oil collecting structure 12 is connected with the first side wall. In other examples, one end of the oil collecting structure 12 can also be connected with the second sub-side wall, or the number of the oil collecting structure 12 is plural, for example, two, and one end of one oil collecting structure 12 is connected with the first sub-side wall, and one end of the other oil collecting structure 12 is connected with the second sub-side wall.

[0110] Here, one end of the oil collecting structure 12 is connected with the side wall 1013c, and the connection mode includes but is not limited to welding, bonding, plugging or clamping.

[0111] In some embodiments, referring to Figure 5 , the number of the oil collecting structure 12 is plural, and the plural oil collecting structures (12) are arranged in sequence in the direction away from the oil storage area 1011.

[0112] The oil collecting structure 12 is provided with an oil collecting groove 121, and the more the number of the oil collecting structure 12, the more the number of the oil collecting groove 121, so that more redundant lubricating oil in the oil storage area 1011 can be transferred and stored in each oil collecting groove 121, further reducing the oil stirring loss of the oil storage device 1 in the horizontal state.

[0113] As an example, referring to Figures 3 to 5 , the number of the oil collecting structure 12 is three, and one end of each of the three oil collecting structures 12 is connected with the side wall 1013c and is spacedly distributed in the mounting area 1012 in the direction away from the oil storage area 1011.

[0114] In some embodiments, referring to Figure 5 , in the direction away from the oil storage area 1011, the length of each oil collecting structure 12 protruding from the side wall 1013c of the accommodating cavity 101 decreases in sequence.

[0115] Through the above arrangement, when the oil storage device 1 is in the horizontal state, the length of each oil collecting structure 12 increases in sequence from top to bottom, so that after the oil collecting groove 121 of the upper oil collecting structure 12 is full of lubricating oil, the redundant lubricating oil naturally flows into the oil collecting groove 121 of the lower oil collecting structure 12, and is sequentially full from top to bottom, and after the oil collecting groove 121 of each layer of oil collecting structure 12 is full, the lubricating oil begins to circulate dynamically.

[0116] Since the oil collecting groove 121 of the oil collecting structure 12 can serve as part of the circulating flow channel of the lubricating oil in the oil storage device 1, the lubricating oil flows into the lower oil storage area 1011 after passing through the oil collecting groove 121 for circulation. By dynamically circulating the redundant lubricating oil in the oil collecting groove 121, the amount of oil in the oil storage area 1011 participating in the oil stirring of the gear assembly 2 when the oil storage device 1 is in a horizontal state is reduced, thereby reducing the oil stirring loss of the vehicle 1000 in a flat road working condition and improving the efficiency of the reducer 10 of the vehicle 1000 in the flat road working condition.

[0117] In some embodiments, referring to Figure 5 , the angle between the plane where the notch 1211 is located and the horizontal plane S is-15°-15° when the oil storage device 1 is in a horizontal state.

[0118] In this way, the oil collecting structure 12 extends better to the middle of the containing cavity 101, so that the oil collecting structure 12 is more likely to collect the lubricating oil thrown out by the gear assembly 2, thereby improving the oil collecting efficiency.

[0119] For example, the angle between the plane where the notch 1211 is located and the horizontal plane S is-15°, -12°, -10°, -8°, -5°, -2°, 0, 2°, 5°, 8°, 10°, 12° or 15°.

[0120] In some embodiments, referring to Figure 5 , the angle between the plane where the notch 1211 is located and the horizontal plane S is 0° when the oil storage device 1 is in a horizontal state. In this way, the oil collecting structure 12 extends in the horizontal direction.

[0121] In some embodiments, referring to Figure 5 , the oil collecting structure 12 comprises a bottom plate 122 and a side plate 123, and the side plate 123 is arranged on the bottom plate 122 and defines the oil collecting groove 121 with the bottom plate 122. In this way, the oil collecting structure 12 is simple in structure and is convenient for reducing the production cost.

[0122] For example, the oil collecting structure 12 is composed of one bottom plate 122 and four side plates 123.

[0123] In some embodiments, referring to Figures 3 to 5 , the side plate 123 is connected to the side wall 1013c of the containing cavity 101. In this way, the oil collecting structure 12 extends better to the middle of the containing cavity 101, so that the oil collecting structure 12 is more likely to collect the lubricating oil thrown out by the gear assembly 2, thereby improving the oil collecting efficiency.

[0124] In some embodiments, referring to Figures 3 to 5The radial dimension of the oil collection groove 121 gradually increases along the depth direction of the oil collection groove 121 from the bottom wall of the oil collection groove 121 to the opening 1211.

[0125] It can be understood that the oil collection groove 121 is a flared groove. As an example, the cross-sectional shape of the oil collection groove 121 can be trapezoidal, triangular or horn-shaped when the oil collection structure 12 is cut along the depth direction of the oil collection groove 121.

[0126] By setting the oil collection groove 121 as a flared groove, on the one hand, the oil collection groove 121 is easier to collect the lubricating oil thrown out by the gear assembly 2 when the oil storage device 1 is in a horizontal state, thereby accelerating the transfer of redundant lubricating oil in the oil storage area 1011 to the oil collection groove 121, on the other hand, the side wall of the oil collection groove 121 can play a role of guiding the flow when the oil storage device 1 is in an inclined state, guiding the lubricating oil in the oil collection groove 121 to flow back to the oil storage area 1011 as much as possible and as quickly as possible, improving the effect and efficiency of the oil collection groove 121 to supplement the oil storage area 1011.

[0127] In some embodiments, referring to Figures 3 to 5 The depth of the oil collection groove 121 is less than any one of the length and the width of the oil collection groove 121.

[0128] It can be understood that the oil collection groove 121 is a shallow groove. By setting the oil collection groove 121 as a shallow groove, the oil collection structure 12 can quickly respond to the change of the inclined state of the oil storage device 1, for example, as long as the oil storage device 1 is slightly inclined, a large amount of lubricating oil in the oil collection groove 121 can flow into the oil storage area 1011 below, achieving rapid oil supplement for the oil storage area 1011.

[0129] In some embodiments, the ratio of the depth of the oil collection groove 121 to the depth of the accommodating cavity 101 is less than or equal to 0.2 in the depth direction of the oil collection groove 121. As an example, the ratio of the depth of the oil collection groove 121 to the depth of the accommodating cavity 101 is 0.2, 0.1, 0.05, 0.02 or 0.01.

[0130] In some embodiments, referring to Figures 3 to 5 The shell 11 further protrudes a flow guide rib 113 away from the oil storage area 1011, and the flow guide rib 113 is configured to be located on the side of the gear assembly 2.

[0131] It can be understood that the guide ribs 113 are located in the accommodation cavity 101. As an example, the guide ribs 113 are formed by protruding the inner surface of the shell 11 on the side of the shell 11 where the accommodation cavity 101 is located. The number of the guide ribs 113 can be one or more. The guide ribs 113 are away from the oil storage area 1011, for example, the guide ribs 113 are arranged corresponding to the mounting area 1012. The guide ribs 113 are configured to be located on the circumferential side of the gear assembly 2, that is, when the gear assembly 2 is mounted in the accommodation cavity 101, the guide ribs 113 are located on the circumferential side of the gear assembly 2. Generally, the guide ribs 113 are spaced apart from the gear assembly 2, so as to avoid interference of the guide ribs 113 with the rotation of the gear assembly 2.

[0132] Since the guide ribs 113 are configured to be located on the circumferential side of the gear assembly 2, when the gear assembly 2 is mounted in the accommodation cavity 101 and rotates, the gear assembly 2 can stir the lubricating oil in the oil storage area 1011 and carry away part of the lubricating oil in the oil storage area 1011. The carried away lubricating oil is further splashed in the accommodation cavity 101 under the action of the centrifugal force of the gear assembly 2, and the guide ribs 113 located on the circumferential side of the gear assembly 2 can block the splashed lubricating oil and guide the lubricating oil to flow to the gear assembly 2, thereby ensuring the lubrication effect of the gear assembly 2 and reducing the wear of the gear assembly 2.

[0133] In some embodiments, the guide ribs 113 are solid structures, so that the guide ribs 113 can also serve as reinforcing ribs to enhance the mechanical strength of the shell 11. Of course, in other embodiments, the guide ribs 113 can also be hollow structures.

[0134] In some embodiments, the guide ribs 113 extend arcuately around the gear assembly 2, that is, the guide ribs 113 are arcuately structured.

[0135] In some embodiments, referring to Figures 3 to 5 , the guide ribs 113 are further configured to extend between the gear assembly 2 and the oil collecting structure 12, and the guide ribs 113 are provided with flow holes 1131.

[0136] That is, when the gear assembly 2 is mounted in the accommodation cavity 101, the guide ribs 113 are located between the gear assembly 2 and the oil collecting structure 12, that is, the gear assembly 2 and the oil collecting structure 12 are separated by the guide ribs 113, which can be completely separated or partially separated. Therefore, by providing the flow holes 1131 on the guide ribs 113, the lubricating oil splashed in the accommodation cavity 101 can pass through the flow holes 1131 and then be stored in the oil collecting groove 121 of the oil collecting structure 12.

[0137] In some embodiments, referring to Figure 3 , the shell 11 is further provided with a vent 104 communicating with the accommodation cavity 101, and the vent 104 is located away from the oil storage area 1011.

[0138] By setting the vent 104, the vent 104 can adjust the air pressure of the containing cavity 101, and keep the air pressure of the containing cavity 101 balanced. Especially in the case that the oil outlet 102 for communicating with the suction member 3 is also set on the shell 11, the vent 104 can promote the air pressure of the containing cavity 101 balanced.

[0139] In some embodiments, the shell 11 is further provided with a vent plug in communication with the vent 104.

[0140] In some embodiments, the number of the vents 104 is multiple, and the multiple vents 104 are distributed at positions corresponding to the installation area 1012 of the shell 11.

[0141] In some embodiments, please refer to Figure 5 , the shell 11 includes a front shell 111 and a rear shell 112, and the front shell 111 and the rear shell 112 are connected with each other and define the containing cavity 101.

[0142] By assembling the front shell 111 and the rear shell 112 together to obtain the shell 11, on the one hand, the manufacturing difficulty of the shell 11 is reduced, and on the other hand, the installation difficulty of the oil storage device 1 is also reduced.

[0143] As an example, the front shell 111 and the rear shell 112 are butt-jointed together.

[0144] In some embodiments, please refer to Figure 5 , the oil collecting structure 12 is connected with the front shell 111. In this way, by connecting the oil collecting structure 12 with the front shell 111 first, and then connecting the front shell 111 and the rear shell 112 together to form the oil storage device 1, the manufacturing difficulty of the oil storage device 1 is reduced.

[0145] In some embodiments, please refer to Figures 3 to 8 , the oil outlet 102 and the oil inlet 103 are set on the front shell 111. In this way, the manufacturing difficulty of the oil storage device 1 is reduced.

[0146] In some embodiments, the material of the shell 11 is metal, so that not only the mechanical strength of the shell 11 can be ensured, but also the metal has good formability, which is beneficial to the manufacturing of the shell 11.

[0147] In some embodiments, the material of the oil collecting structure 12 is metal or plastic.

[0148] In the second aspect, the embodiments of the present application provide a reducer 10, please refer to Figure 3 , the reducer 10 includes the gear assembly 2 and the oil storage device 1 as described above, the gear assembly 2 is rotatably arranged in the containing cavity 101, and part of the gear assembly 2 extends into the oil storage area 1011.

[0149] According to the second aspect of the present application, the speed reducer 10 comprises the oil storage device 1 described above, and has all the beneficial effects of the oil storage device 1 described above, which will not be repeated here.

[0150] In some embodiments, referring to Figure 8 and Figure 4 , the housing 11 is provided with an oil outlet 102, and the speed reducer 10 further comprises a suction member 3 which is in communication with the oil outlet 102 and is used to suck out the lubricating oil in the oil storage area 1011 through the oil outlet 102.

[0151] As an example, referring to Figure 3 , the suction member 3 comprises an oil pump. The housing 11 comprises a front housing 111 and a rear housing 112, and the front housing 111 is provided with a first mounting portion 1111, and the oil pump is connected with the first mounting portion 1111 and is in communication with the oil passage 13 on the front housing 111, and further in communication with the oil outlet 102 through the oil passage 13.

[0152] In some embodiments, referring to Figure 6 , Figure 7 and Figure 4 , the gear assembly 2 comprises a first rotating shaft 21, a second rotating shaft 22 and a first gear 23, the first rotating shaft 21 and the second rotating shaft 22 are rotatably arranged on the housing 11 and spaced apart from each other, the first rotating shaft 21 is provided with a spline portion 211, and the first gear 23 is arranged on the second rotating shaft 22 and is in meshing engagement with the spline portion 211.

[0153] By using the first gear 23 to mesh with the spline portion 211 on the first rotating shaft 21, the transmission between the first rotating shaft 21 and the second rotating shaft 22 can be achieved.

[0154] As an example, the housing 11 comprises a front housing 111 and a rear housing 112, and the front housing 111 is further provided with a second mounting portion 1112 and a third mounting portion 1113, the second mounting portion 1112 and the third mounting portion 1113 are spaced apart, and the first rotating shaft 21 is mounted on the second mounting portion 1112, and the second rotating shaft 22 is mounted on the third mounting portion 1113. Optionally, the second mounting portion 1112 is a groove, and the third mounting portion 1113 is a through hole.

[0155] In some embodiments, referring to Figure 5 and Figure 6 , the oil inlet 103 comprises a first oil inlet 1031, and the first oil inlet 1031 is close to the first gear 23 and the spline portion 211 and is used to supply lubricating oil to the first gear 23 and the spline portion 211.

[0156] By setting the first oil inlet 1031, the first gear 23 and the spline portion 211 are supplied with lubricating oil by the first oil inlet 1031, thereby reducing the wear caused by the meshing of the first gear 23 and the spline portion 211.

[0157] In some embodiments, referring to Figure 7 and Figure 6 , the gear assembly 2 further comprises a first bearing 27, the first bearing 27 is sleeved on the second rotating shaft 22 and connected with the housing 11, and the oil inlet 103 further comprises a second oil inlet 1032, the second oil inlet 1032 is close to the first bearing 27 and is used for supplying lubricating oil to the first bearing 27.

[0158] For example, the housing 11 comprises a front housing 111 and a rear housing 112, the first bearing 27 is sleeved on both ends of the second rotating shaft 22, and the two ends of the second rotating shaft 22 are connected with the front housing 111 and the rear housing 112 through the first bearing 27 respectively, that is, one first bearing 27 is located on the front housing 111, and one first bearing 27 is located on the rear housing 112. The second oil inlet 1032 can be opened on the front housing 111 to supply lubricating oil to the first bearing 27 on the front housing 111, the second oil inlet 1032 can also be opened on the rear housing 112 to supply lubricating oil to the first bearing 27 on the rear housing 112, or the second oil inlet 1032 is opened on both the front housing 111 and the rear housing 112 to supply lubricating oil to the first bearing 27 on both ends of the second rotating shaft 22 respectively. In the case of setting the second oil inlet 1032 on only one of the front housing 111 and the rear housing 112, the first bearing 27 on the other one which is not provided with the second oil inlet 1032 can be supplied with lubricating oil in other ways, for example, in the case that the gear assembly 2 further comprises a second gear 24 and a third gear 25, the first bearing 27 can be splash lubricated by the cooperation of the second gear 24 and the third gear 25.

[0159] By connecting the second rotating shaft 22 with the housing 11 by the first bearing 27, the friction loss of the speed reducer 10 can be reduced to a certain extent, and further, the first bearing 27 is supplied with lubricating oil by the second oil inlet 1032, thereby reducing the wear of the first bearing 27.

[0160] In some embodiments, referring to Figure 7 and Figure 5 , the gear assembly 2 further comprises a second gear 24, a third gear 25 and a third rotating shaft 26, the second gear 24 is arranged on the second rotating shaft 22, the third rotating shaft 26 is rotationally arranged on the housing 11, the third gear 25 is arranged on the third rotating shaft 26 and meshes with the second gear 24, and part of the third gear 25 extends into the oil storage area 1011.

[0161] It can be understood that the first gear 23 and the second gear 24 are arranged on the second rotating shaft 22, so that the first gear 23 and the second gear 24 can rotate synchronously. The third gear 25 is arranged on the third rotating shaft 26, and the third gear 25 is engaged with the second gear 24, so that the transmission between the third rotating shaft 26 and the second rotating shaft 22 can be realized.

[0162] The part of the gear assembly 2 extending into the oil storage area 1011 can be the part of the third gear 25 extending into the oil storage area 1011. In this way, when the third gear 25 rotates, the second gear 24 and the first gear 23 can be further lubricated by splash lubrication.

[0163] In some embodiments, the third rotating shaft 26 corresponds to the first rotating shaft 21, specifically, the third rotating shaft 26 is arranged coaxially with the first rotating shaft 21. For example, the first rotating shaft 21 is arranged to rotate on the front shell 111, and the third rotating shaft 26 is arranged to rotate on the rear shell 112. The free end of the first rotating shaft 21 corresponds to the free end of the third rotating shaft 26.

[0164] In some embodiments, the third rotating shaft 26 is arranged spaced apart and offset from the first rotating shaft 21. For example, the first rotating shaft 21, the second rotating shaft 22 and the third rotating shaft 26 are arranged spaced apart on the front shell 111.

[0165] In some embodiments, referring to Figure 7 and Figure 7 , the gear assembly 2 further comprises a second bearing 28, the second bearing 28 is sleeved on the third rotating shaft 26 and connected with the shell 11, and the oil inlet 103 further comprises a third oil inlet 1033, the third oil inlet 1033 is close to the second bearing 28 and is used for supplying lubricating oil to the second bearing 28.

[0166] By using the second bearing 28 to connect the third rotating shaft 26 with the shell 11, the friction loss of the speed reducer 10 can be reduced to a certain extent. Further, the third oil inlet 1033 is used to supply lubricating oil to the second bearing 28, so as to reduce the wear of the second bearing 28.

[0167] For example, the third oil inlet 1033 is arranged on the front shell 111, and the third rotating shaft 26 is arranged to rotate on the rear shell 112. By reducing the opening size of the third oil inlet 1033, the third oil inlet 1033 can spray lubricating oil onto the second bearing 28.

[0168] As an example, the housing 11 comprises a front housing 111 and a rear housing 112, the second bearings 28 are sleeved on both ends of the third rotating shaft 26, and the two ends of the third rotating shaft 26 are connected with the front housing 111 and the rear housing 112 through the second bearings 28 respectively, that is, one second bearing 28 is located on the front housing 111, and one second bearing 28 is located on the rear housing 112. The third oil inlet 1033 can be provided on the front housing 111 to supply lubricating oil to the second bearing 28 on the front housing 111, or the third oil inlet 1033 can be provided on the rear housing 112 to supply lubricating oil to the second bearing 28 on the rear housing 112, or the third oil inlet 1033 is provided on the front housing 111 and the rear housing 112 to supply lubricating oil to the second bearing 28 on both ends of the third rotating shaft 26 respectively. In the case of providing the third oil inlet 1033 on only one of the front housing 111 and the rear housing 112, the second bearing 28 on the other one without the third oil inlet 1033 can be supplied with lubricating oil in other ways, for example, in the case that the gear assembly 2 further comprises a second gear 24 and a third gear 25, the second bearing 28 can be splash lubricated through cooperation of the second gear 24 and the third gear 25.

[0169] In some embodiments, referring to Figure 8 , the first gear 23 has more teeth than the spline portion 211, and the radius of the first gear 23 is greater than the radius of the second gear 24, the second gear 24 has fewer teeth than the third gear 25, and the radius of the third gear 25 is greater than the radius of the spline portion 211.

[0170] Through the above arrangement, the effect of increasing torque of the speed reducer can be achieved.

[0171] In some embodiments, referring to Figure 9 , the speed reducer 10 further comprises a driving member 4 connected with the first rotating shaft 21 and used to drive the first rotating shaft 21 to rotate. The driving member 4 serves as a power source, and through driving the first rotating shaft 21 to rotate by the driving member 4, the second rotating shaft 22 is driven to rotate through the engagement of the first gear 23 and the spline portion 211, and the third rotating shaft 26 is driven to rotate through the engagement of the second gear 24 and the third gear 25, so as to realize transmission.

[0172] As an example, the driving member 4 comprises an electric motor.

[0173] In some embodiments, the speed reducer 10 comprises a coaxial speed reducer. The coaxial speed reducer has a compact structure, and can save a large space for the layout of the whole vehicle. Of course, in other embodiments, the speed reducer 10 can also comprise a parallel shaft speed reducer.

[0174] In a third aspect, referring to Figure 10The embodiment of the present application provides a power assembly 100, which comprises the motor 20 and the speed reducer 10.

[0175] According to a third aspect of the present application, a power assembly 100 is provided, which comprises the speed reducer 10, and has all the beneficial effects of the speed reducer 10, which will not be repeated here.

[0176] According to a fourth aspect of the present application, a vehicle 1000 is provided, which comprises the speed reducer 10 or the power assembly 100, and has all the beneficial effects of the speed reducer 10 or the power assembly 100, which will not be repeated here. Figure 11 ​ The embodiment of the present application provides a vehicle 1000, which comprises the speed reducer 10 or the power assembly 100.

[0177] According to a fourth aspect of the present application, a vehicle 1000 is provided, which comprises the speed reducer 10 or the power assembly 100, and has all the beneficial effects of the speed reducer 10 or the power assembly 100, which will not be repeated here.

[0178] The vehicle 1000 can be a fuel automobile, a plug-in hybrid electric vehicle or a new energy vehicle, which is not limited in the present application.

[0179] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0180] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0181] The embodiments, implementation manners and related technical features of the present application can be combined, replaced or modified without conflict.

[0182] The above is only the preferred embodiment of the present application, and does not limit the present application in any form, but any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiment, without departing from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.​

Claims

1. An oil storage device (1), characterized in that, The oil storage device (1) comprises: a housing (11) having a containing cavity (101) for rotatably mounting a gear assembly (2) therein; a part of the containing cavity (101) is formed as an oil storage area (1011) for storing lubricating oil and accommodating part of the gear assembly (2), and an oil collecting structure (12) connected with a cavity wall (1013) of the containing cavity (101) and located above the oil storage area (1011), the oil collecting structure (12) is formed with an oil collecting groove (121), an opening (1211) of the oil collecting groove (121) faces away from the oil storage area (1011) and is configured to allow the lubricating oil thrown out by the gear assembly (2) to flow into and out of the oil collecting groove (121).

2. The oil reservoir device (1) according to claim 1, characterized in that The housing (11) is provided with an oil outlet (102) communicating with the containing cavity (101), the oil outlet (102) corresponds to the oil storage area (1011) and is configured to communicate with a suction member (3).

3. The oil reservoir device (1) according to claim 2, characterized in that The housing (11) is also provided with an oil inlet (103) communicating with the containing cavity (101), the oil inlet (103) is located away from the oil storage area (1011) and is configured to supply lubricating oil to the gear assembly (2).

4. The oil reservoir device (1) according to claim 3, characterized in that The housing (11) is also formed with an oil path channel (13) isolated from the containing cavity (101), the oil path channel (13) communicates the oil outlet (102) and the oil inlet (103), and the oil path channel (13) is configured to communicate with the suction member (3) to allow the lubricating oil to flow from the oil outlet (102) to the oil inlet (103) through the oil path channel (13) and flow back into the containing cavity (101).

5. The oil storage device (1) according to claim 2, characterized in that The oil collecting structure (12) and the oil outlet (102) are located on the same side of the housing (11), or the oil collecting structure (12) and the oil outlet (102) are diagonally arranged.

6. The oil reservoir device (1 ) according to any one of claims 1 to 5, characterized in that The cavity wall (1013) of the containing cavity (101) comprises a bottom wall (1013a) close to the oil storage area (1011), a top wall (1013b) opposite to the bottom wall (1013a), and a side wall (1013c) between the bottom wall (1013a) and the top wall (1013b), one end of the oil collecting structure (12) is connected with the side wall (1013c).

7. The oil reservoir device (1) according to claim 6, characterized in that The number of the oil collecting structures (12) is multiple, and the multiple oil collecting structures (12) are arranged in sequence in a direction away from the oil storage area (1011).

8. The oil reservoir device (1) according to claim 7, characterized in that In the direction away from the oil storage area (1011), the length of each oil collecting structure (12) protruding from the side wall (1013c) decreases in sequence.

9. The oil storage device (1) according to claim 6, characterized in that When the oil storage device (1) is in a horizontal state, the angle between the plane where the opening (1211) is located and the horizontal plane is-15°-15°.

10. The oil storage device (1 ) according to any one of claims 1 to 5, characterized in that The oil collecting structure (12) comprises a bottom plate (122) and a side plate (123), the side plate (123) is arranged on the bottom plate (122) and defines the oil collecting groove (121) with the bottom plate (122).

11. The oil storage device (1) according to claim 10, characterized in that The side plate (123) is connected with the cavity wall (1013) of the containing cavity (101).

12. The oil storage device (1 ) according to any one of claims 1 to 5, characterized in that The radial dimension of the oil collecting groove (121) gradually increases along the depth direction from the bottom wall of the oil collecting groove (121) to the slot (1211).

13. The oil storage device (1 ) according to any one of claims 1 to 5, characterized in that The depth of the oil collecting groove (121) is smaller than any one of the length and the width of the oil collecting groove (121).

14. The oil storage device (1 ) according to any one of claims 1 to 5, characterized in that The shell (11) further protrudes a flow guide rib (113) away from the oil storage area (1011) and configured to be located on the circumferential side of the gear assembly (2).

15. The oil storage device (1) according to claim 14, characterized in that The flow guide rib (113) is further configured to extend between the gear assembly (2) and the oil collecting structure (12), and the flow guide rib (113) is provided with a flow hole (1131) penetratingly arranged thereon.

16. The oil storage device (1 ) according to any one of claims 1 to 5, characterized in that The shell (11) is further provided with a ventilation port (104) communicating with the containing cavity (101), and the ventilation port (104) is located away from the oil storage area (1011).

17. The oil storage device (1 ) according to any one of claims 2 to 5, characterized in that The shell (11) comprises a front shell (111) and a rear shell (112), and the front shell (111) and the rear shell (112) are connected to each other and define the containing cavity (101).

18. The oil storage device (1) according to claim 17, characterized in that The oil collecting structure (12) is connected to the front shell (111).

19. The oil storage device (1) according to claim 17, characterized in that The oil outlet (102) and the oil inlet (103) are arranged on the front shell (111).

20. A speed reducer (10) characterized by, The gear assembly (2) is rotatably arranged in the containing cavity (101) and partially extends into the oil storage area (1011).

21. The speed reducer (10) according to claim 20, characterized in that When the shell (11) is provided with the oil outlet (102), the speed reducer (10) further comprises a suction member (3) communicating with the oil outlet (102) and used for sucking out the lubricating oil in the oil storage area (1011) from the containing cavity (101) through the oil outlet (102).

22. The speed reducer (10) according to claim 20, characterized in that The gear assembly (2) comprises a first rotating shaft (21), a second rotating shaft (22) and a first gear (23), the first rotating shaft (21) and the second rotating shaft (22) are rotatably arranged on the shell (11) and spaced apart from each other, the first rotating shaft (21) is provided with a spline portion (211), and the first gear (23) is arranged on the second rotating shaft (22) and meshes with the spline portion (211).

23. The speed reducer (10) according to claim 22, characterized in that The oil inlet (103) comprises a first oil inlet (1031) arranged close to the first gear (23) and the spline portion (211) and used for supplying lubricating oil to the first gear (23) and the spline portion (211).

24. The speed reducer (10) according to claim 22, characterized in that The gear assembly (2) further comprises a first bearing (27) sleeved on the second rotating shaft (22) and connected to the shell (11), and the oil inlet (103) further comprises a second oil inlet (1032) arranged close to the first bearing (27) and used for supplying lubricating oil to the first bearing (27).

25. The speed reducer (10) according to claim 22, characterized in that The gear assembly (2) further comprises a second gear (24), a third gear (25) and a third rotating shaft (26), the second gear (24) is arranged on the second rotating shaft (22), the third rotating shaft (26) is rotatably arranged on the housing (11), the third gear (25) is arranged on the third rotating shaft (26) and meshes with the second gear (24), and part of the third gear (25) extends into the oil storage area (1011).

26. The speed reducer (10) according to claim 25, characterized in that The gear assembly (2) further comprises a second bearing (28), the second bearing (28) is sleeved on the third rotating shaft (26) and connected with the housing (11), and the oil inlet (103) further comprises a third oil inlet (1033), the third oil inlet (1033) is close to the second bearing (28) and used for supplying lubricating oil to the second bearing (28).

27. The speed reducer (10) according to claim 25, characterized in that The first gear (23) has more teeth than the spline (211), and the radius of the first gear (23) is greater than that of the second gear (24), the second gear (24) has less teeth than the third gear (25), and the radius of the third gear (25) is greater than that of the spline (211).

28. The speed reducer (10) according to any one of claims 20 to 27, characterized in that The speed reducer (10) further comprises a driving member (4), the driving member (4) is connected with the first rotating shaft (21) and used for driving the first rotating shaft (21) to rotate.

29. The speed reducer (10) according to any one of claims 20 to 27, characterized in that The speed reducer (10) comprises a coaxial speed reducer.

30. A powertrain (100), characterized by, A power assembly (100) comprising a motor (20) and a speed reducer (10) as claimed in any one of claims 20 to 29, the motor (20) being connected with the speed reducer (10).

31. A vehicle (1000), characterized in that A power assembly (100) as claimed in claim 30, or a speed reducer (10) as claimed in any one of claims 20 to 29.

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