Oil distribution structure of gearbox

Abstract

The present application discloses an oil distribution structure of a gearbox, and relates to the technical field of gear transmission equipment. The oil distribution structure of the gearbox of the present application includes a housing, an oil distribution ring, a first bearing, and a second bearing. The housing has a bearing hole and an oil inlet hole connected to the bearing hole. The first bearing and the second bearing are both arranged in the bearing hole. The first bearing and the second bearing are arranged at intervals to form an oil chamber. The oil distribution ring is sandwiched between the first bearing and the second bearing, and abuts against the outer ring of the first bearing and the outer ring of the second bearing; wherein, an oil circuit is provided on the oil distribution ring, and the oil circuit connects the oil inlet hole with the oil chamber. Therefore, the present application can distribute the lubricating oil introduced through the oil inlet hole to the two bearings, and lubricate the two bearings at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of gear transmission equipment, and in particular to an oil separation structure of a gear box. Background Art

[0002] In gearboxes, especially in rail transit subway gearboxes, the lubrication method generally used is splash lubrication, and the lubricating oil lubricates the bearings on the input shaft through the oil inlet hole on the gearbox shell.

[0003] In the prior art, one end of the input shaft of the gearbox is often sleeved with two bearings, and the lubricating oil introduced through the oil inlet hole will only lubricate the bearing on one side, resulting in insufficient lubrication of the bearing on one side, causing dry grinding and heating of the bearing, shortening the service life of the bearing. Summary of the invention

[0004] The purpose of the present application is to provide an oil distribution structure of a gear box, which can distribute the lubricating oil introduced through the oil inlet hole to two bearings and lubricate the two bearings at the same time.

[0005] The embodiment of the present application is implemented as follows:

[0006] An oil separation structure of a gear box includes a box shell, an oil separation ring, a first bearing and a second bearing, the box shell has a bearing hole and an oil inlet hole connected to the bearing hole, the first bearing and the second bearing are both arranged in the bearing hole, the first bearing and the second bearing are spaced apart to form an oil chamber, the oil separation ring is clamped between the first bearing and the second bearing, and abuts against the outer ring of the first bearing and the outer ring of the second bearing; wherein an oil circuit is provided on the oil separation ring, and the oil circuit connects the oil inlet hole with the oil chamber.

[0007] In one embodiment, an oil guide ring groove is provided on the outer ring wall of the oil separator ring, and the oil guide ring groove is arranged around the oil separator ring. A plurality of oil guide openings are provided on the outer ring wall of the oil separator ring, and the oil guide openings penetrate the inner ring wall of the oil separator ring, wherein the oil guide ring groove and the oil guide openings form the oil circuit.

[0008] In one embodiment, the oil guide opening passes through an end surface of the oil separator ring.

[0009] In one embodiment, the oil guide ring groove passes through an end surface of the oil separator ring.

[0010] In one embodiment, the diameter of the oil guide opening is greater than or equal to the width of the oil guide ring groove.

[0011] In one embodiment, the plurality of oil guide openings are distributed in a circular array around the axis of the oil separator ring.

[0012] In one embodiment, the ring width of the oil separator ring is smaller than the ring width of the outer ring of the first bearing, and the ring width of the oil separator ring is smaller than the ring width of the outer ring of the second bearing.

[0013] In one embodiment, the groove width of the oil guide ring groove is smaller than the axial width of the oil separator ring.

[0014] In one embodiment, the outer ring wall of the oil separator ring contacts the inner wall of the bearing hole.

[0015] In one embodiment, the oil separation structure of the gearbox includes a distance ring, which is clamped between the first bearing and the second bearing and abuts against the inner ring of the first bearing and the inner ring of the second bearing; wherein the distance ring, the oil separation ring, the first bearing and the second bearing form the oil chamber.

[0016] In one embodiment, the oil separation structure of the gearbox includes a rotating shaft and a blind cover, and the first bearing and the second bearing are both sleeved on the rotating shaft; the blind cover is covered on the bearing hole and abuts against the outer ring of the first bearing.

[0017] The beneficial effect of the present application compared with the prior art is that the present application can establish an oil distribution path between the two bearings through the oil distribution ring, so that the lubricating oil introduced from the oil inlet hole can be distributed to the two bearings through the oil path of the oil distribution ring, and the two bearings can be lubricated at the same time, so that the bearing lubrication effect is better, the dry grinding and heating of the bearings are avoided, the service life of the bearings is extended, and the maintenance cost is reduced.

[0018] In addition, the oil separator ring can be an independent accessory, and there is no need to machine a ring groove in the bearing hole of the housing, thus avoiding the problem of local stress concentration in the housing and improving the bearing capacity of the housing. The oil separator ring has a simple structure, is easy to manufacture, and has a low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A cross-sectional view of an oil separation structure of a gear box according to an embodiment of the present application;

[0021] Figure 2 For this application Figure 1 An enlarged view of part A;

[0022] Figure 3 A cross-sectional view of an oil separator ring according to an embodiment of the present application;

[0023] Figure 4 A right side view of an oil separator ring according to an embodiment of the present application;

[0024] Figure 5 A cross-sectional view of an oil separator ring according to an embodiment of the present application;

[0025] Figure 6 A right side view of an oil separator ring according to an embodiment of the present application;

[0026] Figure 7 A cross-sectional view of an oil separator ring according to an embodiment of the present application;

[0027] Figure 8 A right side view of an oil separator ring according to an embodiment of the present application;

[0028] Fig. 9 A cross-sectional view of an oil separation structure of a gear box according to an embodiment of the present application;

[0029] Fig.10 A cross-sectional view of an oil separation structure of a gear box shown in an embodiment of the present application.

[0030] Icons: 100 - oil distribution structure of gearbox; 200 - housing; 210 - bearing hole; 220 - oil inlet hole; 310 - first bearing; 320 - second bearing; 330 - third bearing; 400 - distance ring; 500 - oil distribution ring; 500a - left end face; 500b - right end face; 500c - outer ring wall; 500d - inner ring wall; 510 - oil passage; 511 - oil guide ring groove; 512 - oil guide opening; 600 - rotating shaft; 610 - gear; 620 - shaft pressure plate; 700 - oil protection ring; 800 - blind cover; 900 - oil chamber. DETAILED DESCRIPTION

[0031] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the products of the present application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0034] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0035] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0036] Please refer to Figure 1 , which is a cross-sectional view of an oil separation structure 100 of a gearbox according to an embodiment of the present application. Figure 2 , which is the present application Figure 1 An enlarged view of the A part of a gearbox. An oil distribution structure 100 of a gearbox includes a housing 200, a rotating shaft 600, an oil distribution ring 500, a distance ring 400, a first bearing 310 and a second bearing 320. The housing 200 has a bearing hole 210 and an oil inlet hole 220 communicating with the bearing hole 210. The first bearing 310 and the second bearing 320 are both sleeved on the rotating shaft 600. The first bearing 310 and the second bearing 320 are both installed in the bearing hole 210. The first bearing 310 and the second bearing 320 are spaced apart. The distance ring 400 is sandwiched between the first bearing 310 and the second bearing 320, and abuts against the inner ring of the first bearing 310 and the inner ring of the second bearing 320.

[0037] The oil separator 500 is sandwiched between the first bearing 310 and the second bearing 320, and abuts against the outer ring of the first bearing 310 and the outer ring of the second bearing 320. The distance ring 400, the oil separator 500, the first bearing 310 and the second bearing 320 form an oil chamber 900, and an oil passage 510 is provided on the oil separator 500, which connects the oil inlet 220 with the oil chamber 900.

[0038] In this embodiment, the first bearing 310 is located on the left side of the second bearing 320. The first bearing 310 is a four-point ball bearing, and the second bearing 320 is a cylindrical roller bearing. The axial width of the oil separator 500 is equal to the axial width of the distance ring 400. The outer ring wall 500c of the oil separator 500 contacts the inner wall of the bearing hole 210. In this embodiment, the oil separator 500 and the bearing hole 210 are clearance-fitted.

[0039] In this embodiment, an oil distribution path is established between the first bearing 310 and the second bearing 320 through the oil distribution ring 500, so that the lubricating oil introduced by the oil inlet hole 220 can be distributed to the first bearing 310 and the second bearing 320 through the oil path 510 of the oil distribution ring 500, and the first bearing 310 and the second bearing 320 are lubricated at the same time, so that the lubrication effect of the first bearing 310 and the second bearing 320 is better, the service life of the first bearing 310 and the second bearing 320 is extended, and the maintenance cost is reduced.

[0040] In another embodiment, the oil separator 500 is integrally formed with the housing 200. In this embodiment, the oil separator 500 and the housing 200 are split structures, that is, the oil separator 500 is an independent accessory, and there is no need to process a ring groove in the bearing hole 210 of the housing 200, thereby avoiding the problem of local stress concentration in the housing and improving the bearing capacity of the housing. In addition, the oil separator 500 has a simple structure, is easy to manufacture, and has a low production cost.

[0041] In an embodiment, the rotating shaft 600 may be an input shaft, an output shaft or an intermediate transmission shaft of a gearbox. The oil separation structure 100 of a gearbox may be applied to a gearbox such as a rail transit gearbox, a reducer or a gearbox for a machine tool. In one embodiment, the oil separation structure 100 of a gearbox is applied to a rail transit subway gearbox and uses splash lubrication.

[0042] Please refer to Figure 3 , which is a cross-sectional view of an oil separator ring 500 according to an embodiment of the present application. Figure 4 , which is a right view of the oil separator ring 500 shown in one embodiment of the present application.

[0043] The oil separator 500, the outer ring of the first bearing 310 and the outer ring of the second bearing 320 are all annular structures. In an annular structure, the ring width is equal to the value of the outer circle radius minus the inner circle radius. In this embodiment, the ring width of the oil separator 500 is smaller than the outer ring width of the first bearing 310, and the ring width of the oil separator 500 is smaller than the outer ring width of the second bearing 320.

[0044] The oil separator ring 500 has an outer ring wall 500c, an inner ring wall 500d, a left end face 500a and a right end face 500b. An oil guide ring groove 511 is provided on the outer ring wall 500c of the oil separator ring 500. The oil guide ring groove 511 is a circular ring structure and surrounds the oil separator ring 500. A plurality of oil guide openings 512 are evenly provided on the outer ring wall 500c of the oil separator ring 500. The oil guide openings 512 penetrate the inner ring wall 500d of the oil separator ring 500. The oil guide ring groove 511 and the oil guide openings 512 form an oil path 510. In this embodiment, there are five oil guide openings 512, which are distributed in a circular array around the axis of the oil separator ring 500.

[0045] The oil guide ring groove 511 is a blind groove and is located in the middle of the oil separator ring 500 along the axial direction of the oil separator ring 500. The groove width of the oil guide ring groove 511 is smaller than the axial width of the oil separator ring 500. Therefore, the oil guide ring groove 511 does not penetrate the left end face 500a and the right end face 500b and the inner ring wall 500d of the oil separator ring 500, but only penetrates the outer ring wall 500c of the oil separator ring 500. Among them, the groove width of the oil guide ring groove 511 is the width of the oil guide ring groove 511 along the axial direction of the oil separator ring 500.

[0046] The oil guide opening 512 is a through hole, the depth of which is equal to the ring width of the oil separator ring 500, and the diameter of which is smaller than the axial width of the oil separator ring 500. The oil guide opening 512 is located on the right side of the oil separator ring 500 along the axial direction of the oil separator ring 500, and penetrates the right end surface 500b of the oil separator ring 500, and simultaneously penetrates the outer ring wall 500c and the inner ring wall 500d of the oil separator ring 500.

[0047] During an operation, lubricating oil is supplied through the oil inlet 220 (see Figure 2 ) first flows into the oil guide ring groove 511 of the oil dividing ring 500, then enters the oil chamber 900 through the oil guide opening 512, and finally the lubricating oil in the oil chamber 900 flows into the first bearing 310 and the second bearing 320 respectively, so that the first bearing 310 and the second bearing 320 can be lubricated at the same time.

[0048] Please refer to Figure 5 , which is a cross-sectional view of an oil separator ring 500 according to an embodiment of the present application. Figure 6 , which is a right view of the oil separator ring 500 shown in one embodiment of the present application.

[0049] The oil guide ring groove 511 is a blind groove and is located in the middle of the oil separator ring 500 along the axial direction of the oil separator ring 500. The groove width of the oil guide ring groove 511 is smaller than the axial width of the oil separator ring 500. Therefore, the oil guide ring groove 511 does not penetrate the left end face 500a and the right end face 500b and the inner ring wall 500d of the oil separator ring 500, but only penetrates the outer ring wall 500c of the oil separator ring 500.

[0050] The oil guide opening 512 is a through hole, the depth of the oil guide opening 512 is equal to the ring width of the oil separator 500, the diameter of the oil guide opening 512 is smaller than the axial width of the oil separator 500, and the oil guide opening 512 is located in the middle position of the oil separator 500 along the axial direction of the oil separator 500, so the oil guide opening 512 does not penetrate the left end face 500a and the right end face 500b of the oil separator 500, but penetrates the outer ring wall 500c and the inner ring wall 500d of the oil separator 500. Among them, the diameter of the oil guide opening 512 is greater than or equal to the groove width of the oil guide ring groove 511.

[0051] During an operation, lubricating oil is supplied through the oil inlet 220 (see Figure 2 ) first flows into the oil guide ring groove 511 of the oil dividing ring 500, then enters the oil chamber 900 through the oil guide opening 512, and finally the lubricating oil in the oil chamber 900 flows into the first bearing 310 and the second bearing 320 respectively, so that the first bearing 310 and the second bearing 320 can be lubricated at the same time.

[0052] Please refer to Figure 7 , which is a cross-sectional view of an oil separator ring 500 according to an embodiment of the present application. Figure 8 , which is a right view of the oil separator ring 500 shown in one embodiment of the present application.

[0053] The oil guide ring groove 511 is a blind groove, and is located at the right side of the oil separator ring 500 along the axial direction of the oil separator ring 500, and penetrates the right end face 500b of the oil separator ring 500. The groove width of the oil guide ring groove 511 is smaller than the axial width of the oil separator ring 500. Therefore, the oil guide ring groove 511 does not penetrate the left end face 500a and the inner ring wall 500d of the oil separator ring 500, but penetrates the right end face 500b and the outer ring wall 500c of the oil separator ring 500.

[0054] The oil guide opening 512 is a through hole, the depth of which is equal to the ring width of the oil separator ring 500, and the diameter of which is smaller than the axial width of the oil separator ring 500. The oil guide opening 512 is located on the right side of the oil separator ring 500 along the axial direction of the oil separator ring 500, and the oil guide opening 512 penetrates the right end surface 500b of the oil separator ring 500, and penetrates the outer ring wall 500c and the inner ring wall 500d of the oil separator ring 500 at the same time.

[0055] During an operation, lubricating oil is supplied through the oil inlet 220 (see Figure 2 ) first flows into the oil guide ring groove 511 of the oil dividing ring 500, then enters the oil chamber 900 through the oil guide opening 512, and finally the lubricating oil in the oil chamber 900 flows into the first bearing 310 and the second bearing 320 respectively, so that the first bearing 310 and the second bearing 320 can be lubricated at the same time.

[0056] Please refer to Fig. 9, which is a cross-sectional view of an oil separation structure 100 of a gearbox shown in an embodiment of the present application. The oil separation structure 100 of the gearbox includes a gear 610, an axial pressure plate 620 and a blind cover 800. The blind cover 800 is provided on the bearing hole 210 and abuts against the outer ring of the first bearing 310 for axial positioning of the first bearing 310. The axial pressure plate 620 is provided at the end of the rotating shaft 600 and is located on the inner side of the blind cover 800. The gear 610 is provided on the rotating shaft 600. The gear 610 can be integrally formed with the rotating shaft 600, or can be fixed by a key connection or the like.

[0057] Please refer to Fig.10 , which is a cross-sectional view of an oil separation structure 100 of a gearbox according to an embodiment of the present application. The oil separation structure 100 of the gearbox includes an oil protection ring 700 and a third bearing 330. The third bearing 330 is mounted on the housing 200 and sleeved outside the rotating shaft 600. Two oil protection rings 700 are provided, both sleeved on the rotating shaft 600, wherein one oil protection ring 700 is located between the gear 610 and the second bearing 320, and the other oil protection ring 700 is located between the gear 610 and the third bearing 330. The third bearing 330 may be a cylindrical roller bearing.

[0058] The two oil protection rings 700 installed on both sides of the gear 610 can prevent the high-temperature lubricating oil stirred and meshed by the gear 610 from directly entering the first bearing 310, the first bearing 310, the second bearing 320 or the third bearing 330, thereby affecting the service life of the first bearing 310, the second bearing 320 or the third bearing 330.

[0059] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil separation structure of a gear box, characterized in that: include: The box shell has a bearing hole and an oil inlet hole communicating with the bearing hole; A first bearing and a second bearing are both disposed in the bearing hole, and the first bearing and the second bearing are spaced apart to form an oil chamber; and An oil separator ring is sandwiched between the first bearing and the second bearing and abuts against the outer ring of the first bearing and the outer ring of the second bearing, and the ring width of the oil separator ring is smaller than the ring width of the outer ring of the first bearing and the ring width of the outer ring of the second bearing; An oil guide ring groove is provided on the outer ring wall of the oil separator ring, and the oil guide ring groove is arranged around the oil separator ring. A plurality of oil guide openings are provided on the outer ring wall of the oil separator ring, and the oil guide openings penetrate the inner ring wall of the oil separator ring, wherein the diameter of the oil guide openings is greater than or equal to the groove width of the oil guide ring groove, and the plurality of oil guide openings are distributed in a circular array around the axis of the oil separator ring; The oil separator ring is provided with an oil circuit, the oil guide ring groove and the oil guide opening form the oil circuit, and the oil circuit connects the oil inlet hole with the oil cavity; A distance ring is sandwiched between the first bearing and the second bearing and abuts against the inner ring of the first bearing and the inner ring of the second bearing. The distance ring, the oil separator ring, the first bearing and the second bearing form the oil chamber.

2. The oil separation structure of the gear box according to claim 1, characterized in that: The oil guide opening passes through one end surface of the oil dividing ring.

3. The oil separation structure of the gear box according to claim 1, characterized in that: The oil guide ring groove passes through one end surface of the oil dividing ring.

4. The oil separation structure of the gear box according to claim 1, characterized in that: The outer ring wall of the oil separator ring contacts the inner wall of the bearing hole.

5. The oil separation structure of the gear box according to claim 1, characterized in that: include: A rotating shaft, wherein the first bearing and the second bearing are both sleeved on the rotating shaft; as well as A blind cover is arranged on the bearing hole and abuts against the outer ring of the first bearing.

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