Oil inlet ring structure and planetary gear box

Abstract

The utility model belongs to the technical field of gearbox lubrication, and discloses an oil inlet ring structure and a planetary gearbox. The oil inlet ring structure is arranged between a planet carrier bearing and a mounting box body and comprises an oil inlet ring body, the oil inlet ring body is provided with an oil conveying channel used for circulating lubricating oil, one side of the oil inlet ring body abuts against the planet carrier bearing, and an oil cavity is concavely formed in the side, away from the planet carrier bearing, of the oil inlet ring body; the oil cavity is annularly arranged in the circumferential direction of the oil inlet ring body and communicates with the oil conveying channel. The oil inlet ring body comprises a jacking convex part arranged on the periphery of the oil cavity, the end, away from the planet carrier bearing, of the jacking convex part abuts against the installation box body, a circulation groove is formed in the jacking convex part and right faces an oil inlet of the installation box body, and the circulation groove is used for communicating the oil inlet with the oil cavity. The oil inlet ring structure can bear the axial pressure applied by the planet carrier bearing and effectively transmit the axial pressure to the mounting box body, and the situation that the oil inlet ring body is damaged when subjected to large axial impact can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gearbox lubrication, in particular to an oil inlet ring structure and a planetary gearbox. Background Technique

[0002] Internal lubrication of the planetary gearbox requires oil injection outside the box body. The lubricating oil entering the gearbox will flow to each branch oil circuit and lubrication point under the distribution of the oil inlet ring, so as to realize the normal lubrication of the planetary mechanism.

[0003] The existing oil inlet ring is usually arranged between the box body and the support bearing facing the oil inlet of the gearbox, and needs to bear the axial pressure exerted by the support bearing. The ring grooves for oil inlet on the oil inlet ring are mostly of an exposed structure, resulting in a thin structure of the oil inlet ring and being unable to bear axial impact and load well. Once the axial pressure is too large, it will be damaged, which will affect the normal lubrication of the planetary mechanism. Content of the Utility Model

[0004] The purpose of the utility model is to provide an oil inlet ring structure and a planetary gearbox, which can bear large axial loads and impacts, and have a simple, reliable and durable structure.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an oil inlet ring structure, which is arranged between the planetary carrier bearing and the installation box body, and includes an oil inlet ring body. The inside of the oil inlet ring body has an oil transmission channel for circulating lubricating oil. One side of the oil inlet ring body abuts against the planetary carrier bearing. An oil cavity is recessed on the side of the oil inlet ring body far from the planetary carrier bearing. The oil cavity is arranged in a ring shape along the circumferential direction of the oil inlet ring body, and the oil cavity is communicated with the oil transmission channel;

[0007] The oil inlet ring body includes a top support convex part arranged on the outer periphery of the oil cavity. One end of the top support convex part far from the planetary carrier bearing abuts against the installation box body. A circulation groove is opened on the top support convex part facing the oil inlet of the installation box body, and the circulation groove is used for communicating the oil inlet and the oil cavity.

[0008] Preferably, the circulation groove is arranged at one end of the top support convex part far from the planetary carrier bearing.

[0009] Preferably, a bearing oil injection hole is opened on the oil inlet ring body facing the ball of the planetary carrier bearing, and the bearing oil injection hole is communicated with the oil cavity.

[0010] Preferably, the bearing oil injection holes include a first flow hole provided on the inner wall of the oil inlet ring body and a second flow hole provided on the outer wall of the oil inlet ring body. The first flow hole communicates with the second flow hole, and the inner diameter of the first flow hole is larger than that of the second flow hole.

[0011] Preferably, the first flow hole and the second flow hole are coaxially arranged.

[0012] Preferably, the oil inlet ring structure further includes a gear tooth oil injection pipe. The gear tooth oil injection pipe is arranged on the oil inlet ring body. One end of the gear tooth oil injection pipe communicates with the oil transmission channel, and the other end of the gear tooth oil injection pipe is arranged opposite to the sun gear.

[0013] Preferably, a plurality of the oil transmission channels are provided.

[0014] Preferably, the plurality of oil transmission channels are uniformly arranged circumferentially on the oil inlet ring body.

[0015] Preferably, a slip ring oil injection hole is provided on the oil inlet ring body opposite to the slip ring. The slip ring oil injection hole communicates with the oil transmission channel.

[0016] A planetary gearbox includes a planetary carrier bearing, a mounting housing, and the above oil inlet ring structure.

[0017] The beneficial effects of the present utility model are as follows:

[0018] The oil inlet ring structure provided by the present utility model is arranged between the planetary carrier bearing and the mounting housing. The oil inlet ring body abuts against the planetary carrier bearing. Since the oil inlet ring body has an oil transmission channel for circulating lubricating oil, the oil cavity of the oil inlet ring body communicates with the oil transmission channel, and the oil cavity communicates with the oil inlet on the mounting housing through a flow groove. Therefore, the lubricating oil injected from the oil inlet on the mounting housing can flow into the oil transmission channel of the oil inlet ring body through the flow groove and the oil cavity, thereby realizing the lubrication of the planetary mechanism inside the mounting housing. Since a top support convex portion is provided on the outer periphery of the oil cavity, and one end of the top support convex portion away from the planetary carrier bearing abuts against the mounting housing, the top support convex portion can bear the axial pressure applied by the planetary carrier bearing and effectively transmit the axial pressure to the mounting housing, thereby realizing stable and reliable axial support and positioning for the planetary carrier bearing, and effectively avoiding the situation that the oil inlet ring body is damaged when being subjected to a large axial impact. Since the flow groove is provided opposite to the oil inlet on the mounting housing, the portion of the top support convex portion except the flow groove abuts against both the mounting housing and the planetary carrier bearing, greatly improving the stability and reliability of the support.

[0019] The planetary gearbox provided by the present utility model includes a planetary carrier bearing and a mounting housing, and adopts the above oil inlet ring structure, and can bear large axial loads and axial impact forces of the input shaft, and has a simple, reliable and durable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 1 is a cross-sectional view of the oil inlet ring structure provided by the specific embodiment of the present utility model;

[0021] Figure 2 is Figure 1 a partial enlarged view of the position A in FIG. 1.

[0022] In the figure:

[0023] 100 - planetary carrier bearing;

[0024] 200 - mounting housing; 210 - oil inlet;

[0025] 300 - sun gear;

[0026] 400 - slip ring;

[0027] 1 - oil inlet ring body; 11 - oil transmission channel; 12 - oil cavity; 13 - supporting convex part; 131 - flow channel; 14 - bearing oil injection hole; 141 - first flow hole; 142 - second flow hole; 15 - slip ring oil injection hole;

[0028] 2 - gear tooth oil injection pipe. SPECIFIC EMBODIMENT

[0029] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0030] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right" and "left" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0033] Such as Figure 1As shown in the figure, the present utility model provides an oil inlet ring structure, which is arranged between the planetary carrier bearing 100 and the installation box body 200. The oil inlet ring structure includes an oil inlet ring body 1. The interior of the oil inlet ring body 1 has an oil transmission channel 11 for circulating lubricating oil. One side of the oil inlet ring body 1 abuts against the planetary carrier bearing 100. An oil cavity 12 is recessed on the side of the oil inlet ring body 1 away from the planetary carrier bearing 100. The oil cavity 12 is arranged in a ring shape along the circumferential direction of the oil inlet ring body 1. The oil cavity 12 is communicated with the oil transmission channel 11. The oil inlet ring body 1 includes a top support convex part 13 arranged on the outer periphery of the oil cavity 12. One end of the top support convex part 13 away from the planetary carrier bearing 100 abuts against the installation box body 200. A circulation groove 131 is opened on the top support convex part 13 opposite to the oil inlet 210 of the installation box body 200. The circulation groove 131 is used to communicate the oil inlet 210 and the oil cavity 12. In this embodiment, since the oil inlet ring body 1 has an oil transmission channel 11 for circulating lubricating oil, the oil cavity 12 of the oil inlet ring body 1 is communicated with the oil transmission channel 11, and the oil cavity 12 is communicated with the oil inlet 210 on the installation box body 200 through the circulation groove 131, the lubricating oil injected from the oil inlet 210 of the installation box body 200 can flow into the oil transmission channel 11 of the oil inlet ring body 1 through the circulation groove 131 and the oil cavity 12, so as to realize the lubrication of the planetary mechanism inside the installation box body 200. Since a top support convex part 13 is arranged on the outer periphery of the oil cavity 12, and one end of the top support convex part 13 away from the planetary carrier bearing 100 abuts against the installation box body 200, the top support convex part 13 can bear the axial pressure applied by the planetary carrier bearing 100 and effectively transmit the axial pressure to the installation box body 200, so as to realize stable and reliable axial support and positioning for the planetary carrier bearing 100, and at the same time, it can also effectively avoid the situation that the oil inlet ring body 1 is damaged when being subjected to a large axial impact. Since the circulation groove 131 is opened opposite to the oil inlet 210 of the installation box body 200, the part of the top support convex part 13 except the circulation groove 131 abuts against both the installation box body 200 and the planetary carrier bearing 100, which greatly improves the stability and reliability of the support. Specifically, the first direction is the axial direction of the planetary carrier bearing 100. The input shaft of the gearbox is installed in the installation box body 200 along the first direction. An oil cavity 12 is recessed on the side of the oil inlet ring body 1 away from the planetary carrier bearing 100 along the first direction. The oil inlet ring body 1 is a ring structure. The input shaft of the gearbox passes through the oil inlet ring body 1 and meshes with the sun gear 300. There is one oil inlet 210 opened on the installation box body 200.

[0034] Further, the oil cavity 12 is arranged in a ring shape on the oil inlet ring body 1. In this embodiment, the oil inlet ring body 1 is a ring structure. The oil cavity 12 is opened on the oil inlet ring body 1 along the circumferential direction of the oil inlet ring body 1 and is connected end to end to form a ring. A plurality of oil transmission channels 11 are arranged at intervals. The plurality of oil transmission channels 11 are respectively communicated with the oil cavity 12. Therefore, the lubricating oil in the oil cavity 12 can flow into each oil transmission channel 11 quickly from opposite directions in the annular oil cavity 12.

[0035] Furthermore, the flow groove 131 is arranged at one end of the top support convex part 13 away from the planetary carrier bearing 100. In this embodiment, the flow groove 131 is located between the top support convex part 13 and the mounting box body 200. It can be understood that only one flow groove 131 is provided on the top support convex part 13 corresponding to the oil inlet 210, and the rest of the top support convex part 13 is respectively abutted against the planetary carrier bearing 100 and the mounting box body 200; the lubricating oil enters from the oil inlet 210 and flows into the oil cavity 12 through the flow groove 131, and the oil delivery channel 11 of the oil inlet ring body 1 is communicated with each lubrication point of the planetary mechanism inside the mounting box body 200. Therefore, this oil inlet ring structure can deliver the lubricating oil to each lubrication point for lubrication.

[0036] Furthermore, as Figure 1 and Figure 2 shown, a bearing oil injection hole 14 is provided on the oil inlet ring body 1 opposite to the balls of the planetary carrier bearing 100, and the bearing oil injection hole 14 is communicated with the oil cavity 12. In this embodiment, the bearing oil injection hole 14 is axially arranged on the oil inlet ring body 1 along the planetary carrier bearing 100, and the bearing oil injection hole 14 is communicated with the oil delivery channel 11. Therefore, the lubricating oil in the oil delivery channel 11 can flow to the balls of the planetary carrier bearing 100 through the bearing oil injection hole 14, so as to realize the lubrication of the planetary carrier bearing 100.

[0037] Specifically, as Figure 1 and Figure 2 shown, the bearing oil injection hole 14 includes a first flow hole 141 arranged on the inner wall of the oil inlet ring body 1 and a second flow hole 142 arranged on the outer wall of the oil inlet ring body 1. The first flow hole 141 is communicated with the second flow hole 142, and the inner diameter of the first flow hole 141 is larger than that of the second flow hole 142. In this embodiment, the bearing oil injection hole 14 is composed of the first flow hole 141 and the second flow hole 142 axially along the planetary carrier bearing 100. The lubricating oil in the oil cavity 12 will sequentially pass through the first flow hole 141 and the second flow hole 142 and flow to the balls of the planetary carrier bearing 100; since the inner diameter of the second flow hole 142 is smaller than that of the first flow hole 141, the flow rate and pressure of the lubricating oil will increase after entering the second flow hole 142, so that the lubricating oil can be fully and effectively sprayed onto the planetary carrier bearing 100.

[0038] Specifically, as Figure 2As shown, the first flow hole 141 and the second flow hole 142 are coaxially arranged. In this embodiment, the first flow hole 141 and the second flow hole 142 are coaxially formed, so that the lubricating oil can flow out of the bearing oil injection hole 14 evenly and stably; specifically, along the axial direction of the planet carrier bearing 100, the bottom of the first flow hole 141 is a tapered structure, and the inner diameter dimension of the first flow hole 141 gradually shrinks to the inner diameter dimension of the second flow hole 142. In another embodiment, both the first flow hole 141 and the second flow hole 142 are regular cylindrical cavities, and the bottom of the first flow hole 141 along the axial direction is a sudden contraction structure, and the inner diameter dimension of the first flow hole 141 directly shrinks to the inner diameter dimension of the second flow hole 142.

[0039] Further, as Figure 1 shown, the oil inlet ring structure further includes a gear oil spray pipe 2. The gear oil spray pipe 2 is arranged on the oil inlet ring body 1. One end of the gear oil spray pipe 2 is communicated with the oil delivery channel 11, and the other end of the gear oil spray pipe 2 is arranged opposite to the sun gear 300. In this embodiment, the oil delivery channel 11 includes a radially extending section and an axially extending section that are communicated with each other. The radially extending section and the axially extending section are vertically connected. The radially extending section extends along the radial direction of the planet carrier bearing 100, and the axially extending section extends parallel to the axial direction of the planet carrier bearing 100; specifically, the bearing oil injection hole 14 is communicated with the radially extending section, and the gear oil spray pipe 2 is communicated with the axially extending section. The gear oil spray pipe 2 is used to guide the lubricating oil in the oil delivery channel 11 to the sun gear 300 and spray it on the gear teeth, so as to realize the lubrication of the sun gear 300.

[0040] Further, a plurality of oil delivery channels 11 are provided. In this embodiment, a plurality of oil delivery channels 11 are formed on the oil inlet ring body 1, and the plurality of oil delivery channels 11 are all communicated with the oil cavity 12. Therefore, the oil inlet ring structure can deliver lubricating oil to the lubrication points through the plurality of oil delivery channels 11, greatly improving the lubrication efficiency and lubrication effect.

[0041] Specifically, the plurality of oil delivery channels 11 are uniformly arranged on the oil inlet ring body 1 in the circumferential direction. In this embodiment, the oil inlet ring body 1 is in a circular ring structure, and the plurality of oil delivery channels 11 are uniformly arranged on the oil inlet ring body 1 in the circumferential direction, so that the lubricating oil can evenly deliver lubricating oil to different lubrication points from each oil delivery channel 11, thus ensuring the lubrication effect.

[0042] Further, as Figure 1As shown, a slip ring oil injection hole 15 is provided on the oil inlet ring body 1 opposite to the slip ring 400, and the slip ring oil injection hole 15 is communicated with the oil delivery channel 11. In this embodiment, the oil delivery channel 11 is composed of a radial section and an axial section, the radial section and the axial section are vertically connected, the radial section extends along the radial direction of the planetary carrier bearing 100, and the axial section extends parallel to the axial direction of the planetary carrier bearing 100; the slip ring oil injection hole 15 is arranged on the axial section and is provided opposite to the slip ring 400, so as to be able to deliver lubricating oil to the slip ring 400 to lubricate the lubrication points inside the planetary carrier.

[0043] This embodiment also provides a planetary gearbox, which includes a planetary carrier bearing 100, a mounting housing 200 and the above-mentioned oil inlet ring structure. In this embodiment, the planetary gearbox further includes planetary gears and an input shaft. The planetary carrier bearing 100 is arranged in the mounting housing 200, the oil inlet ring structure is arranged in the mounting housing 200 and is assembled between the planetary carrier bearing 100 and the mounting housing 200. The input shaft passes through the oil inlet ring structure and meshes with the sun gear 300 on the planetary gear, and the planetary gear is rotationally matched with the mounting housing 200 through the planetary carrier bearing 100. This planetary gearbox can withstand large axial loads and axial impact forces of the input shaft, and can smoothly lubricate each lubrication point inside, with a simple structure, reliable and durable.

[0044] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. An oil inlet ring structure, arranged between the planetary carrier bearing (100) and the mounting box (200), characterized in that: The oil inlet ring structure comprises an oil inlet ring body (1), the interior of the oil inlet ring body (1) is provided with an oil delivery channel (11) for circulating lubricating oil, one side of the oil inlet ring body (1) is in contact with the planetary carrier bearing (100), and the side of the oil inlet ring body (1) away from the planetary carrier bearing (100) is provided with an oil cavity (12), the oil cavity (12) is arranged in an annular shape along the circumference of the oil inlet ring body (1), and the oil cavity (12) is communicated with the oil delivery channel (11); The oil inlet ring body (1) comprises a supporting protrusion (13) arranged on the outer periphery of the oil chamber (12); one end of the supporting protrusion (13) away from the planetary carrier bearing (100) abuts against the mounting box (200); a flow groove (131) is provided on the supporting protrusion (13) facing the oil inlet (210) of the mounting box (200); the flow groove (131) is used to connect the oil inlet (210) and the oil chamber (12).

2. The oil inlet ring structure according to claim 1, characterized in that: The circulation groove (131) is arranged at an end of the supporting protrusion (13) away from the planet carrier bearing (100).

3. The oil inlet ring structure according to claim 1, characterized in that: A bearing oil spray hole (14) is provided on the oil inlet ring body (1) facing the ball of the planetary carrier bearing (100), and the bearing oil spray hole (14) is connected to the oil chamber (12).

4. The oil inlet ring structure according to claim 3, characterized in that: The bearing oil spray hole (14) comprises a first flow hole (141) arranged on the inner wall of the oil inlet ring body (1) and a second flow hole (142) arranged on the outer wall of the oil inlet ring body (1), the first flow hole (141) is connected to the second flow hole (142), and the inner diameter of the first flow hole (141) is larger than the inner diameter of the second flow hole (142).

5. The oil inlet ring structure according to claim 4, characterized in that: The first circulation hole (141) and the second circulation hole (142) are coaxially arranged.

6. The oil inlet ring structure according to claim 1, characterized in that: The oil inlet ring structure also includes a gear oil injection pipe (2), which is arranged on the oil inlet ring body (1), one end of the gear oil injection pipe (2) is connected to the oil delivery channel (11), and the other end of the gear oil injection pipe (2) is arranged opposite to the sun gear (300).

7. The oil inlet ring structure according to claim 1, characterized in that: The oil delivery channels (11) are provided in plurality.

8. The oil inlet ring structure according to claim 7, characterized in that: The plurality of oil delivery channels (11) are evenly arranged along the circumferential direction on the oil inlet ring body (1).

9. The oil inlet ring structure according to claim 1, characterized in that: A slip ring oil spray hole (15) is provided on the oil inlet ring body (1) facing the slip ring (400), and the slip ring oil spray hole (15) is connected to the oil delivery channel (11).

10. Planetary gearbox, characterized in that, It comprises a planetary carrier bearing (100), a mounting box (200) and an oil inlet ring structure as claimed in any one of claims 1 to 9.

Images