Multi-bearing structure and gearbox

Abstract

The utility model relates to the technical field of bearing lubrication, in particular to a multi-bearing structure and a gearbox, the multi-bearing structure comprises bearings, inner check rings and a first assembly body, in order to achieve lubrication of the multiple bearings and prolong the service life of the multi-bearing structure, a lubricating oil cavity is defined by every two adjacent bearings and the corresponding inner check ring, and the first assembly body is arranged in the lubricating oil cavity. The annular oil groove is communicated with the lubricating oil cavity through a flow channel in the inner check ring, and the oil channel is communicated with the annular oil groove. Lubricating oil is introduced into the oil channels, so that the lubricating oil can enter the lubricating oil cavities through the annular oil grooves and the flow channels, and the two adjacent bearings are lubricated. The annular oil groove is formed in the first assembly body, the annular oil groove does not need to be formed in the inner check ring, then the thickness of the inner check ring in the axis direction of the first assembly body can be reduced, the gap width between the two adjacent bearings is reduced, the size of the multi-bearing structure in the axial direction of the bearings is reduced, the installation space is saved, and installation of the multi-bearing structure is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing lubrication technical field especially, relates to multi bearing structure and gearbox. BACKGROUND

[0002] Bearing structure includes single bearing and multi bearing, single bearing structure bearing stress is big, and easy to be damaged, in multi bearing structure, since each bearing bears radial force, makes multi bearing structure can bear greater radial load, and multi bearing structure can promote the working stability of heavy load machinery.

[0003] But since multi bearing structure is more complex, not easy to add lubricating oil, after a period of time, the lubricating oil in multi bearing structure is gradually consumed, the bearing interior friction force increases, and then causes bearing life to reduce.

[0004] To solve this problem, as Figure 1 And Figure 2 The prior art discloses a double bearing structure, including shaft 100, interval ring 200, gear 300 and two bearings 1, two bearings 1 are sleeved on shaft 100, interval ring 200 is sleeved on shaft 100 and is located between two bearings 1, interval ring 200 is arranged at intervals between two bearings 1, gear 300 is simultaneously sleeved on two bearings 1, interval ring 200, gear 300 and two bearings 1 are surrounded to form a lubricating cavity, in order to supply oil to the lubricating cavity, then oil channel 32 is arranged on shaft 100, the oil outlet of oil channel 32 is opposite interval ring 200, oil groove 201 is recessed on the opposite side of interval ring 200 and shaft 100, interval ring 200 is also provided with oil hole 202 around its circumference, oil hole 202 is communicated with oil groove 201 and lubricating cavity, and the oil in oil channel 32 can enter oil groove 201, and simultaneously flow into lubricating cavity from oil hole 202, thereby realizing lubrication of two bearings 1.

[0005] However, in order to set up oil groove 201 and oil hole 202 on interval ring 200, the axial dimension of interval ring 200 needs to be increased, and then the interval dimension of two bearings 1 is too large, when multi bearing structure is installed, too much installation space is occupied, which is not conducive to the installation of double bearing structure. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing multi bearing structure and gearbox, to solve the problem that the axial dimension of multi bearing structure is too large in the related art, and then too much installation space is occupied, which is not conducive to the installation of multi bearing structure.

[0007] On the one hand, the utility model provides multi bearing structure, and the multi bearing structure comprises:

[0008] First assembly body;

[0009] a plurality of bearings, each of which is sleeved on the first assembly body and is spaced along the axial direction of the first assembly body;

[0010] an inner retainer, which is sleeved on the first assembly body, is clamped between every two adjacent bearings, and has two end faces that respectively abut against two adjacent bearings, and a gap is formed between the two adjacent bearings;

[0011] the outer peripheral wall of the first assembly body is concave at a position opposite to the gap, and an annular oil groove is formed at the position; the first assembly body is provided with an oil channel that is in communication with the annular oil groove; and the inner retainer is provided with a flow channel along the radial direction of the inner retainer, the flow channel being in communication with the corresponding annular oil groove and the corresponding gap.

[0012] As a preferred technical solution of the multi-bearing structure, the inner retainer is concave with a plurality of first flow grooves along one side wall in the axial direction of the first assembly body, the first flow grooves extend along the radial direction of the inner retainer, the first flow grooves and the inner rings of the opposite bearings surround the flow channel, and a plurality of the first flow grooves are spaced around the axial direction of the inner retainer.

[0013] As a preferred technical solution of the multi-bearing structure, the inner retainer is concave with a plurality of second flow grooves along the other side wall in the axial direction of the first assembly body, the second flow grooves extend along the radial direction of the inner retainer, the second flow grooves and the inner rings of the opposite bearings surround the flow channel, a plurality of the second flow grooves are spaced around the axial direction of the inner retainer, and a plurality of the first flow grooves and a plurality of the second flow grooves are arranged alternately.

[0014] As a preferred technical solution of the multi-bearing structure, the oil channel includes a main oil channel and a branch oil channel, the main oil channel extends along the axial direction of the first assembly body, and the branch oil channel is used to communicate the main oil channel and the annular oil groove.

[0015] As a preferred technical solution of the multi-bearing structure, the branch oil channel is provided with a plurality of branch oil channels, at least two branch oil channels are provided for each annular oil groove, and the branch oil channels are spaced around the axial direction of the first assembly body.

[0016] As a preferred technical solution of the multi-bearing structure, an outer retainer is further included, the outer retainer is sleeved on the first assembly body, and one outer retainer is clamped between the outer rings of every two adjacent bearings along the axial direction of the first assembly body.

[0017] As a preferred technical solution of the multi-bearing structure, a second assembly body is further included, the second assembly body is sleeved on a plurality of the bearings simultaneously.

[0018] The second assembly body is provided with a mounting shaft hole, an inner wall of the mounting shaft hole is provided with a first groove corresponding to the outer check ring, and the outer check ring is arranged in the corresponding first groove.

[0019] As a preferred technical solution of the multi-bearing structure, two edge check rings are arranged on the first assembly body, two bearings at two ends of the first assembly body are respectively in abutment with the two edge check rings along the axis of the first assembly body, and the two edge check rings are fixed relative to the first assembly body along the axis of the first assembly body.

[0020] As a preferred technical solution of the multi-bearing structure, the first assembly body is a rotating shaft, and the second assembly body is a gear or a roller.

[0021] In another aspect, the utility model provides a gearbox comprising the multi-bearing structure in any of the above schemes.

[0022] The utility model discloses a beneficial effect is:

[0023] The utility model provides a multi-bearing structure and gearbox, this multi-bearing structure includes bearing, inner check ring and first assembly body, and bearing includes a plurality, and bearing and inner check ring are arranged on first assembly body along the axis of first assembly body, and every two adjacent bearings are clamped one inner check ring to make the clearance between two adjacent bearings, and the position of the outer peripheral wall of first assembly body is concave with the clearance annular oil groove is set up, and the annular oil groove is set up around the axis of first assembly body, and the oil channel is set up in first assembly body, and the oil channel is communicated with annular oil groove, and the flow channel is set up in inner check ring along the radial direction of inner check ring, and the flow channel communicates corresponding annular oil groove and corresponding clearance. In this multi-bearing structure, a plurality of bearings are arranged on the first assembly body, and compared with one bearing, a plurality of bearings can bear greater force. In order to realize the lubrication of a plurality of bearings, improve the service life of the multi-bearing structure, and then make two adjacent bearings and inner check ring surround the lubricating oil cavity, the annular oil groove is communicated with the lubricating oil cavity through the flow channel on the inner check ring, and the oil channel is communicated with the annular oil groove. By passing lubricating oil into the oil channel, the lubricating oil can enter the lubricating oil cavity through the annular oil groove and the flow channel, thereby lubricating the adjacent two bearings to improve the service life of the bearings. Wherein, the annular oil groove is arranged on the first assembly body, and only the flow channel is arranged on the inner check ring, so as to realize the communication between the oil channel and the lubricating oil cavity, without arranging the annular oil groove on the inner check ring, thereby reducing the thickness of the inner check ring along the axis of the first assembly body, reducing the gap width between the two adjacent bearings, reducing the size of the multi-bearing structure along the bearing axial direction, saving the installation space, and facilitating the installation of the multi-bearing structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the double-bearing structure in the prior art;

[0025] Figure 2 Structure diagram of the intermediate spacer ring in the prior art;

[0026] Figure 3 Structure diagram of the multi-bearing structure in the embodiment of the present application;

[0027] Figure 4 Structure diagram of the inner retaining ring in the embodiment of the present application Figure 1 ;

[0028] Figure 5 Structure diagram of the inner retaining ring in the embodiment of the present application Figure 2 ;

[0029] Figure 6 Structure diagram of the first assembly in the embodiment of the present application.

[0030] In the drawings:

[0031] 100, rotating shaft; 200, intermediate spacer ring; 201, oil groove; 202, oil hole; 300, gear;

[0032] 1, bearing;

[0033] 2, inner retaining ring; 21, first flow groove; 22, second flow groove;

[0034] 3, first assembly; 31, annular oil groove; 32, oil channel; 321, main oil channel; 322, branch oil channel;

[0035] 4, second assembly; 41, mounting shaft hole; 411, first recess;

[0036] 5, outer retaining ring; 6, edge retaining ring. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0038] In the description of the utility model, it is necessary to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and, the first feature is "above", "above" and "above" of the second feature, including the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" of the second feature, including the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] In the description of the utility model, it is necessary to explain, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected; it can be mechanical connection, can also be electrical connection; it can be directly connected, can also be indirectly connected through intermediate medium, can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as a limitation on the utility model.

[0041] As Figure 1 And Figure 2As shown, the prior art discloses a double bearing structure, comprising a rotating shaft 100, a spacer ring 200, a gear 300 and two bearings 1, the two bearings 1 are sleeved on the rotating shaft 100, the spacer ring 200 is sleeved on the rotating shaft 100 and located between the two bearings 1, the spacer ring 200 is arranged to separate the two bearings 1, the gear 300 is sleeved on the two bearings 1 at the same time, the spacer ring 200, the gear 300 and the two bearings 1 are surrounded to form a lubricating cavity, in order to supply oil into the lubricating cavity, an oil channel 32 is further arranged on the rotating shaft 100, an oil outlet of the oil channel 32 is opposite to the spacer ring 200, an oil groove 201 is recessed on a side of the spacer ring 200 opposite to the rotating shaft 100, the spacer ring 200 is further provided with an oil hole 202 around the circumference thereof, the oil hole 202 communicates the oil groove 201 and the lubricating cavity, the oil in the oil channel 32 can enter the oil groove 201 and flow into the lubricating cavity from the oil hole 202 at the same time, thereby realizing lubrication of the two bearings 1.

[0042] However, in order to arrange the oil groove 201 and the oil hole 202 on the spacer ring 200, the axial size of the spacer ring 200 needs to be increased, thereby causing the spacing size of the two bearings 1 to be too large, when the multi-bearing structure is installed, too much installation space is occupied, which is not conducive to the installation of the double bearing structure.

[0043] To solve the above problems, as shown in the drawings, Figures 3-6As shown, the embodiment provides a multi-bearing structure, which comprises bearings 1, inner retaining rings 2, a first assembly 3 and a second assembly 4, the bearings 1 comprise a plurality of bearings 1; the bearings 1 and the inner retaining rings 2 are sleeved on the first assembly 3 along an axis of the first assembly 3, and one inner retaining ring 2 is clamped between the inner rings of every two adjacent bearings 1 to form a gap between the two adjacent bearings 1, and an annular oil groove 31 is concavely arranged on a position of an outer peripheral wall of the first assembly 3 opposite to the gap, the annular oil groove 31 is arranged around the axis of the first assembly 3, an oil channel 32 is arranged in the first assembly 3, the oil channel 32 is in communication with the annular oil groove 31, and a flow channel is arranged on the inner retaining ring 2 along a radial direction of the inner retaining ring 2, the flow channel is in communication with the corresponding annular oil groove 31 and the corresponding gap; and the second assembly 4 is sleeved on the plurality of bearings 1. In the multi-bearing structure, the plurality of bearings 1 can enable the first assembly 3 and the second assembly 4 to rotate relative to each other, and compared with one bearing 1, the plurality of bearings 1 can bear greater relative force of the first assembly 3 and the second assembly 4. In order to realize lubrication of the plurality of bearings 1 and improve the service life of the multi-bearing structure, the two adjacent bearings 1, the inner retaining ring 2 and the second assembly 4 are enclosed to form a lubricating oil cavity, the annular oil groove 31 is in communication with the lubricating oil cavity through the flow channel on the inner retaining ring 2, and the oil channel 32 is in communication with the annular oil groove 31. By introducing lubricating oil into the oil channel 32, the lubricating oil can enter the lubricating oil cavity through the annular oil groove 31 and the flow channel, thereby lubricating the two adjacent bearings 1 to improve the service life of the bearings 1. In the embodiment, the annular oil groove 31 is arranged on the first assembly 3, and only the flow channel needs to be arranged on the inner retaining ring 2 to realize communication between the oil channel 32 and the lubricating oil cavity, without the need of arranging the annular oil groove 31 on the inner retaining ring 2, thereby reducing the thickness of the inner retaining ring 2 along the axis of the first assembly 3, reducing the gap width between the two adjacent bearings 1, and reducing the size of the multi-bearing structure along the axial direction of the bearings 1, thereby saving the installation space and facilitating the installation of the multi-bearing structure.

[0044] Specifically, the number of bearings 1 is n, and the number of inner retaining rings 2 is n-1. n is an integer greater than or equal to 2.

[0045] Optionally, a plurality of first flow grooves 21 are concavely arranged on one side wall of the inner retaining ring 2 along the axial direction of the first assembly 3, the first flow grooves 21 extend along the radial direction of the inner retaining ring 2, the first flow grooves 21 and the inner rings of the opposite bearings 1 enclose the flow channel, and the plurality of first flow grooves 21 are arranged at intervals around the axial direction of the inner retaining ring 2. In the embodiment, compared with directly arranging the flow channel on the inner retaining ring 2, the first flow grooves 21 and the inner rings of the opposite bearings 1 enclose the flow channel, which can further reduce the thickness of the inner retaining ring 2 along the axis of the first assembly 3, thereby reducing the size of the multi-bearing structure along the axial direction of the bearings 1.

[0046] Optionally, the inner retainer 2 is concavely provided with a plurality of second flow grooves 22 on the other side wall of the first assembly 3 in the axial direction, the second flow grooves 22 extend in the radial direction of the inner retainer 2, the second flow grooves 22 and the inner ring of the opposite bearing 1 surround a flow channel, the plurality of second flow grooves 22 are arranged at intervals around the axial direction of the inner retainer 2, and the plurality of first flow grooves 21 and the plurality of second flow grooves 22 are arranged alternately. In this embodiment, compared with directly arranging the flow channel on the inner retainer 2, the second flow grooves 22 and the inner ring of the opposite bearing 1 surround the flow channel, which can further reduce the thickness of the inner retainer 2 in the axial direction of the first assembly 3, and further reduce the size of the multi-bearing structure in the axial direction of the bearing 1. At the same time, the plurality of first flow grooves 21 and the plurality of second flow grooves 22 are arranged alternately, which avoids the coincidence of the first flow grooves 21 and the second flow grooves 22 in the axial direction of the first assembly 3, and further reduces the thickness of the inner retainer 2.

[0047] In other embodiments, the flow channel can also be arranged inside the inner retainer.

[0048] Optionally, a plurality of flow channels are arranged, and the plurality of flow channels are arranged at intervals around the axis of the first assembly 3 in the inner retainer 2. In this embodiment, one end of the plurality of flow channels is in communication with the annular oil groove 31 at the same time, and the other end is in communication with the corresponding lubricating oil cavity at the same time. This arrangement can improve the oil intake of the lubricating oil cavity and the uniformity of the lubricating oil in the lubricating oil cavity.

[0049] Optionally, the oil channel 32 includes a main oil channel 321 and a branch oil channel 322, the main oil channel 321 extends along the axis of the first assembly 3, and the branch oil channel 322 is used to communicate the main oil channel 321 and the annular oil groove 31. In this embodiment, one end of the main oil channel 321 is in communication with the outside, and the lubricating oil enters through the main oil channel 321, and then enters the annular oil groove 31 along the branch oil channel 322.

[0050] Optionally, the branch oil channel 322 is provided with a plurality of branch oil channels 322, and at least two branch oil channels 322 in communication with each annular oil groove 31 are arranged at intervals around the axis of the first assembly 3. In this embodiment, this arrangement can improve the oil intake of the annular oil groove 31 and the uniformity of the lubricating oil in the annular oil groove 31.

[0051] Optionally, the multi-bearing structure further includes an outer retainer 5, the outer retainer 5 is sleeved on the first assembly 3, and one outer retainer 5 is clamped between the outer rings of every two adjacent bearings 1 along the axis of the first assembly 3. In this embodiment, the outer retainer 5 and the inner retainer 2 support the outer rings and the inner rings of the adjacent two bearings 1 respectively, which can improve the stability of the relative position of the adjacent two bearings 1, avoid the inclination of the bearing 1, and avoid the jamming problem when the first assembly 3 and the second assembly 4 relatively rotate.

[0052] Optionally, the second assembly body 4 is provided with a mounting shaft hole 41, an inner wall of the mounting shaft hole 41 is provided with a first groove 411 corresponding to the outer check ring 5, and the outer check ring 5 is arranged in the corresponding first groove 411.

[0053] Optionally, the inner ring of the bearing 1 is provided on the first assembly body 3 in an interference fit, and the hole wall of the mounting shaft hole 41 of the second assembly body 4 is provided on the outer ring of the bearing 1 in an interference fit.

[0054] Optionally, the multi-bearing structure further comprises two edge check rings 6, the two edge check rings 6 are arranged on the first assembly body 3, and the two edge check rings 6 are arranged at the two ends of the plurality of bearings 1 along the axis of the first assembly body 3 and abut against the two bearings 1 at the two ends, respectively.

[0055] Optionally, the first assembly body 3 is provided with two second grooves along the axial direction of the first assembly body 3, and the two edge check rings 6 are arranged in the two second grooves, respectively.

[0056] Optionally, the first assembly body 3 is a rotating shaft 100, and the second assembly body 4 is a gear 300 or a roller.

[0057] The embodiment also provides a gearbox comprising the multi-bearing structure in the above-mentioned scheme.

[0058] Obviously, the above-mentioned embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above-mentioned description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A multi-bearing arrangement, characterised in that, The application relates to a bearing assembly. The bearing assembly comprises: a first assembly body (3); a plurality of bearings (1) sleeved on the first assembly body (3) and spaced along the axial direction of the first assembly body (3); an inner retainer (2) sleeved on the first assembly body (3), the inner retainer (2) being arranged between every two adjacent bearings (1) and the end faces of the inner retainer (2) being in abutment with the inner rings of the two adjacent bearings (1), so that a gap is formed between the two adjacent bearings (1); 2. The multi-bearing structure of claim 1, wherein, the outer peripheral wall of the first assembly body (3) is concave at a position opposite to the gap and is provided with an annular oil groove (31), the first assembly body (3) is provided with an oil channel (32) in communication with the annular oil groove (31), and the inner retainer (2) is provided with a flow channel along the radial direction of the inner retainer (2), the flow channel being in communication with the corresponding annular oil groove (31) and the corresponding gap.

3. The multi-bearing structure of claim 2, wherein, The inner retainer (2) is concave at one side wall along the axial direction of the first assembly body (3) and is provided with a plurality of first flow grooves (21) extending along the radial direction of the inner retainer (2), the first flow grooves (21) and the inner rings of the opposite bearings (1) surrounding the flow channel, and the plurality of first flow grooves (21) being spaced along the axial direction of the inner retainer (2).

4. The multi-bearing structure of claim 1, wherein, The inner retainer (2) is concave at the other side wall along the axial direction of the first assembly body (3) and is provided with a plurality of second flow grooves (22) extending along the radial direction of the inner retainer (2), the second flow grooves (22) and the inner rings of the opposite bearings (1) surrounding the flow channel, the plurality of second flow grooves (22) being spaced along the axial direction of the inner retainer (2), and the plurality of first flow grooves (21) and the plurality of second flow grooves (22) being arranged alternately.

5. The multi-bearing structure of claim 4, wherein, The oil channel (32) comprises a main oil channel (321) extending along the axis of the first assembly body (3) and a branch oil channel (322) in communication with the main oil channel (321) and the annular oil groove (31).

6. The multi-bearing structure of claim 1, wherein, The branch oil channel (322) is provided with a plurality of branch oil channels (322) in communication with each annular oil groove (31), and at least two branch oil channels (322) are provided and are spaced along the axis of the first assembly body (3).

7. The multi-bearing structure of claim 6, wherein, The bearing assembly further comprises an outer retainer (5) sleeved on the first assembly body (3) and clamping the outer rings of every two adjacent bearings (1) along the axis of the first assembly body (3). The bearing assembly further comprises a second assembly body (4) sleeved on the plurality of bearings (1); the second assembly body (4) is provided with a mounting shaft hole (41) with a first groove (411) corresponding to the outer retainer (5) in the inner wall of the mounting shaft hole (41), and the outer retainer (5) is arranged in the corresponding first groove (411).

8. The multi-bearing structure of claim 1, wherein, Two edge blocking rings (6) are further included, the two edge blocking rings (6) are sleeved on the first assembly body (3), and two bearings (1) at two ends of the first assembly body (3) are respectively in abutment with the two edge blocking rings (6) along the axis of the first assembly body (3), and the two edge blocking rings (6) are fixed relative to the first assembly body (3) along the axis of the first assembly body (3).

9. The multi-bearing structure of claim 7, wherein, The first assembly body (3) is a rotating shaft (100), and the second assembly body (4) is a gear or a roller.

10. A gearbox, characterized by The multi-bearing structure of any one of claims 1-9 is included.

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