Planetary gear reducer lubrication structure

Abstract

The present invention discloses a lubrication structure for a planetary gear reducer, comprising a planetary carrier and an oil separator body, wherein the oil separator body and the planetary carrier are connected via a connecting structure; one end of the oil separator body is recessed to form an oil collecting chamber, wherein the oil collecting chamber comprises a baffle portion located at one end of the oil separator body and an annular retaining portion formed around the baffle portion, wherein the annular retaining portion is provided with a plurality of oil outlets corresponding to the plurality of planetary gear pairs on the planetary carrier. In the technical solution of the present invention, after the oil separator body is installed at one end of the inner hole of the planetary carrier, while improving the utilization rate of the lubricating oil flowing out of the planetary carrier, the lubricating oil can be guided as much as possible to the gear pair that needs lubrication. Under the condition of the same heat generation of the gear pair, the oil pump flow rate used is smaller, the power consumption of the electric drive assembly is smaller, and the cost of the electric drive assembly is lower. This structure, combined with the active lubrication method, can improve the efficiency of the reducer.

Description

Technical Field

[0001] The present invention relates to the technical field of reducers, and in particular to a lubrication structure for a planetary gear reducer. Background Art

[0002] The motor output speed of the reducer of new energy vehicles is high, and the meshing of the sun gear and planetary gears requires sufficient lubrication, otherwise problems such as gear pitting and gluing will occur. The lubrication method for the gear pair in the reducer is usually splash lubrication or active lubrication. If the sun gear pair is lubricated with splash lubrication, the required oil level is high, and the reducer efficiency is low. If active lubrication is used, if the oil from the hollow shaft of the motor is not guided, the oil will flow along the wall of the planetary carrier, failing to lubricate the sun gear pair. Traditional planetary carrier structures lack effective diversion structures, and lubricating oil is easily lost, which can easily lead to failure of gear pair components. Summary of the Invention

[0003] The main purpose of the present invention is to provide a planetary gear reducer lubrication structure, which aims to solve the problem that the traditional planetary carrier structure lacks an effective guide structure, the lubricating oil is easily lost, and thus the gear pair parts are easily damaged.

[0004] To achieve the above-mentioned purpose, the present invention proposes a planetary gear reducer lubrication structure, comprising a planet carrier, and further comprising:

[0005] An oil distribution plate body, wherein the oil distribution plate body is connected to the planet carrier via a connecting structure;

[0006] One end of the oil separation plate body is recessed to form an oil collecting chamber. The oil collecting chamber includes a baffle portion located at one end of the oil separation plate body and an annular retaining portion formed around the baffle portion. The annular retaining portion is provided with multiple oil outlets corresponding to the multiple planetary gear pairs on the planetary carrier.

[0007] Preferably, the annular retaining portion includes an inner circumferential wall and an outer circumferential wall, the inner circumferential wall is located on the inner side of the oil collecting chamber, and the inner circumferential wall includes a plurality of arc-shaped oil guiding structures, and two adjacent oil outlets are connected by an arc-shaped oil guiding structure, and the arc-shaped oil guiding structure is used to promote the lubricating oil in the oil collecting chamber to flow to the oil outlet.

[0008] Preferably, the arc-shaped oil guiding structure includes a concave arc surface facing the oil collecting chamber and two convex arc surfaces, the two convex arc surfaces are connected to the two ends of the concave arc surface, and the other ends of the two convex arc surfaces are respectively connected to two adjacent oil outlets.

[0009] Preferably, the oil outlet includes an oil inlet end connected to the bottom of the oil collecting chamber and an oil outlet end protruding from the outer peripheral wall, and an oil outlet opening is provided on the oil outlet end, and the oil outlet opening is arranged in the same direction as the oil collecting chamber opening.

[0010] Preferably, the baffle portion is provided with a fan-blade oil guide structure at one end corresponding to the inner side of the oil collecting chamber, for promoting the lubricating oil in the oil collecting chamber to move from the center of the oil collecting chamber to the annular baffle portion.

[0011] Preferably, the fan blade oil guide structure includes a plurality of blades arranged on the baffle portion, one end portion of the plurality of blades is connected, the plurality of blades are all arranged in an arc shape, and the arc convex surfaces of the plurality of blades are arranged corresponding to the rotation direction of the planetary carrier.

[0012] Preferably, the connecting ends of the plurality of blades are higher than the dispersing ends of the plurality of blades.

[0013] Preferably, the connection structure includes a plurality of claws provided at one end of the baffle portion away from the oil collecting chamber, and the plurality of claws each include a cantilever and a clamping foot, the cantilever is fixedly connected to the baffle portion, and the clamping foot is provided at one end of the cantilever.

[0014] Preferably, the connection structure further comprises a plurality of mounting grooves provided on the planet carrier corresponding to the plurality of oil outlet ends;

[0015] The outer peripheral wall is configured as an arc-shaped surface corresponding to the inner hole of the planet carrier.

[0016] Preferably, an annular baffle extends from the opening edge of the oil collecting chamber toward the middle of the oil collecting chamber.

[0017] In the technical solution of the present invention, after the oil distribution plate main body is installed at one end of the inner hole of the planetary carrier, it can effectively collect the lubricating oil inside the planetary carrier, and can make the collected lubricating oil corresponding to the multiple gear pairs connected to the sun gear be discharged in a centralized manner. While improving the utilization rate of the lubricating oil flowing out of the planetary carrier, it can also guide the lubricating oil to the gear pairs that need lubrication as much as possible. In this solution, under the condition of the same heat generation of the gear pairs, the oil pump flow rate used is smaller, the power consumption of the electric drive assembly is smaller, the cost of the electric drive assembly is lower, and the product market competitiveness is greater. This structure, combined with the active lubrication method, can improve the efficiency of the reduction gear box. In addition, the oil guiding structure in the oil distribution plate can promote the discharge of oil to multiple oil outlets while meeting the oil collection effect, effectively improving the lubrication efficiency and effect of the gear pairs, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 A schematic three-dimensional structural diagram of an oil distribution plate main body of a lubrication structure for a planetary gear reducer provided by the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the specific structure of the inner peripheral wall structure;

[0021] Figure 3 for Figure 1 A schematic diagram of the back structure of the oil distribution plate body of the planetary gear reducer lubrication structure;

[0022] Figure 4 for Figure 1 A schematic diagram of a portion of the structure of the planetary carrier in the lubrication structure of the planetary gear reducer;

[0023] Figure 5 This is a schematic three-dimensional structural diagram of another embodiment of the oil distribution plate main body of the planetary gear reducer lubrication structure provided by the present invention.

[0024] Description of Figure Numbers:

[0025] Label name Label name 1000 Oil distributor body 2000 planetary carrier 1 Oil collecting chamber 22 Oil outlet 11 Baffle 221 Oil outlet 12 Ring baffle 3 blade 121 Inner wall 4 claws 1211 concave arc surface 41 cantilever 1212 Convex surface 42 Clip 122 Outer wall 5 Mounting slot 13 Annular baffle 6 Ring body 2 Oil outlet 61 Oil drain port 21 Oil inlet 62 flange

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The motor output speed of the reducer of new energy vehicles is high, and the meshing of the sun gear and planetary gears requires sufficient lubrication, otherwise problems such as gear pitting and gluing will occur. The lubrication method for the gear pair in the reducer is usually splash lubrication or active lubrication. If the sun gear pair is lubricated with splash lubrication, the required oil level is high, and the reducer efficiency is low. If active lubrication is used, if the oil from the hollow shaft of the motor is not guided, the oil will flow along the wall of the planetary carrier, failing to lubricate the sun gear pair. Traditional planetary carrier structures lack effective diversion structures, and lubricating oil is easily lost, which can easily lead to failure of gear pair components.

[0031] In order to solve the above problems, the present invention proposes a planetary gear reducer lubrication structure, which is Figures 1 to 4 A structural schematic diagram of an embodiment of the lubrication structure of a planetary gear reducer provided by the present invention.

[0032] Please refer to Figures 1 to 4 The present invention proposes a planetary gear reducer lubrication structure, which mainly includes an oil separator main body 1000. The oil separator main body 1000 is installed at one end of the planetary carrier 2000, and can collect the lubricating oil inside the planetary carrier 2000 and then discharge it centrally to multiple gear pairs connected to the sun gear, so as to fully lubricate the gear pairs and avoid failure of the gear pair parts due to insufficient lubrication. Specifically, one end of the oil separator main body 1000 is concave to form an oil collecting chamber 1, so as to collect the lubricating oil from one end of the planetary carrier 2000 through the oil collecting chamber 1. The number of the multiple oil outlets 2 is set according to actual conditions, and the specific number corresponds to the number of gear pairs connected to the sun gear. In addition, the structure of the oil separator main body 1000 in this embodiment adopts a plate-closed structure, and one end thereof is sealed by a baffle portion 11, which is conducive to the collection of oil. There is another embodiment for the structure of the oil separator main body 1000 described above, please refer to Figure 5In another embodiment, the oil distribution plate main body 1000 is a ring-mounted structure. When installed, it is installed on the inner hole of the planetary carrier 2000 through the outer wall of the ring-mounted structure, and is fixed to one end of the planetary carrier 2000 through the threaded hole on the fixing ear (not marked in the figure). At the same time, one end of the ring-mounted body is provided with an inward flange 62 for resisting the lubricating oil flowing down from the inner wall of the planetary carrier 2000. The ring-mounted body is also provided with corresponding oil drain ports 61 corresponding to the specific number of gear pairs. The structure in the above other embodiment can also meet the technical effect of discharging the lubricating oil inside the planetary carrier 2000 in a targeted manner to multiple gear pairs, so as to improve the utilization rate of the lubricating oil and enhance the lubrication effect.

[0033] Among them, when one end of the oil distribution plate main body 1000 is concave, an annular retaining portion 12 is formed along its circumference. The annular retaining portion 12 has a circumferential inner wall 121 and an outer wall 122. In addition to forming a basic oil storage structure together with the baffle portion 11, the inner wall 121 is also composed of multiple arc-shaped oil guide structures, which are used to promote the lubricating oil in the oil collecting chamber 1 to flow to the oil outlet 2.

[0034] Specifically, such as Figure 2 As shown, the arc-shaped oil guiding structure includes a concave arc surface 1211 and two convex arc surfaces 1212 facing the oil collecting chamber 1, the two convex arc surfaces 1212 are connected to the two ends of the concave arc surface 1211, and the other ends of the two convex arc surfaces 1212 are respectively connected to two adjacent oil outlets 2. It should be noted that the radius of the concave arc surface 1211 is greater than the radius of the circle formed by the vertices of the multiple concave arc surfaces 1211. At this time, during the rotation of the oil distribution plate main body 1000 with the planetary carrier 2000, the lubricating oil on the inner concave surface of the concave arc surface 1211 can be promoted to move toward the oil outlet 2. In addition, in addition to the above embodiments, the structure of the inner circumferential wall 121 is not limited to parabolas, circular arcs, straight lines, wavy lines, and all other features that can convert radial flow of oil into axial flow.

[0035] In addition, in order to enable the lubricating oil discharged from the oil outlet 2 to be discharged to multiple gear pairs connected to the sun gear, the oil outlet opening 221 of the oil outlet 2 is parallel to the axial direction of the planetary carrier 2000, that is, the oil outlet opening 221 is arranged in the same direction as the opening of the oil collecting chamber 1. When the lubricating oil is discharged from the oil outlet opening 221, it can be accurately discharged to the corresponding gear pair, thereby further improving the lubrication effect.

[0036] In order to promote the movement of the lubricating oil in the oil collecting chamber 1 from the center of the oil collecting chamber 1 to the annular baffle 12 , a fan blade oil guide structure is provided at one end of the baffle portion 11 corresponding to the inner side of the oil collecting chamber 1 .

[0037] Specifically, the fan blade oil guide structure includes a plurality of blades 3 provided on the baffle portion 11, one end portion of the plurality of blades 3 is connected, the other end portion of the plurality of blades 3 is dispersed, and the dispersion angles of the plurality of blades 3 are evenly spaced, and the plurality of blades 3 are all arranged as an arc structure, and the arc convex surface thereof is arranged corresponding to the rotation direction of the planetary carrier 2000. During the peripheral rotation of the new frame, the force exerted by the arc convex surface on the lubricating oil is more obvious, thereby effectively promoting the movement of the lubricating oil from the center position of the oil collecting chamber 1 toward its surroundings, thereby promoting the discharge of the lubricating oil.

[0038] The blade 3 structure is high in the center and low around, and adopts a parabolic structure. The parabolic form includes all features such as parabolas, arcs, straight lines, wavy lines, etc. that can push oil from the center to the outer diameter. The blade 3 structure can be applied to the oil collecting and separating plate, and can also be applied to the planetary carrier 2000.

[0039] The connection structure includes first installing the oil separator main body 1000 on the planetary carrier 2000 by interference fitting with the inner hole of the planetary carrier 2000 through part of the outer peripheral wall 122. During this process, multiple oil outlet ends 22 cooperate with multiple installation grooves 5 on the end of the planetary carrier 2000, thereby realizing the sunken installation of the oil separator main body 1000, and then continuing to install the oil separator main body 1000 inward along the axial direction of the planetary carrier 2000. During this process, the baffle portion 11 is connected to the planetary carrier 2000 by means of multiple claws 4. Specifically, the claws 4 include multiple cantilevers 41 and clamping feet 42. The maximum outer diameter of the clamping feet 42 is larger than the diameter of the mounting hole of the planetary carrier 2000. It is installed on the planetary carrier 2000 by radially shrinking during assembly and rebounding after installation.

[0040] In addition, an annular baffle 13 extends from the opening edge of the oil collecting chamber 1 toward the middle position of the oil collecting chamber 1. The annular baffle 13 can prevent the lubricating oil in the oil collecting chamber 1 from flowing back upward from the opening of the oil collecting chamber 1 during the movement of the planetary carrier 2000.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A planetary gear reducer lubrication structure, comprising a planet carrier, characterized in that: Also includes: An oil distribution plate body, wherein the oil distribution plate body is connected to the planet carrier via a connecting structure; One end of the oil separator body is recessed to form an oil collecting chamber. The oil collecting chamber includes a baffle portion located at one end of the oil separator body and an annular retaining portion formed around the baffle portion. The annular retaining portion is provided with a plurality of oil outlets corresponding to the plurality of planetary gear pairs on the planetary carrier. The annular retaining portion includes an inner circumferential wall and an outer circumferential wall, the inner circumferential wall is located inside the oil collecting chamber, and the inner circumferential wall includes a plurality of arc-shaped oil guiding structures, and two adjacent oil outlets are connected by the arc-shaped oil guiding structures, and the arc-shaped oil guiding structures are used to promote the lubricating oil in the oil collecting chamber to flow to the oil outlet; The arc-shaped oil guide structure includes a concave arc surface facing the oil collecting cavity and two convex arc surfaces, the two convex arc surfaces are connected to two ends of the concave arc surface, and the other ends of the two convex arc surfaces are respectively connected to two adjacent oil outlets; The oil outlet includes an oil inlet end connected to the bottom of the oil collecting chamber and an oil outlet end protruding from the outer peripheral wall. The oil outlet end is provided with an oil outlet opening, and the oil outlet opening is arranged in the same direction as the oil collecting chamber opening. The connecting structure includes a plurality of claws provided at one end of the baffle portion away from the oil collecting chamber, each of the claws includes a cantilever and a clamping foot, the cantilever is fixedly connected to the baffle portion, and the clamping foot is provided at one end of the cantilever; The connection structure further includes a plurality of mounting grooves provided on the planet carrier corresponding to the plurality of oil outlet ends; The outer peripheral wall is configured as an arc-shaped surface corresponding to the inner hole of the planet carrier.

2. The lubrication structure of the planetary gear reducer according to claim 1, characterized in that: The baffle portion is provided with a fan-blade oil guide structure at one end corresponding to the inner side of the oil collecting chamber, which is used to promote the lubricating oil in the oil collecting chamber to move from the center of the oil collecting chamber to the annular baffle portion.

3. The lubrication structure of the planetary gear reducer according to claim 2, characterized in that: The fan blade oil guide structure includes a plurality of blades arranged on the baffle portion, one end portion of the plurality of blades is connected, the plurality of blades are all arranged in an arc shape, and the arc convex surfaces of the plurality of blades are arranged corresponding to the rotation direction of the planetary carrier.

4. The lubrication structure of the planetary gear reducer according to claim 3, characterized in that: The connecting ends of the plurality of blades are higher than the dispersing ends of the plurality of blades.

5. The lubrication structure of the planetary gear reducer according to claim 1, characterized in that: An annular baffle extends from the opening edge of the oil collecting chamber toward the middle of the oil collecting chamber.

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