Rolling and sliding composite bearing

Abstract

The utility model relates to a rolling and sliding composite bearing, and belongs to the technical field of bearings. The bearing comprises a bearing outer ring, a bearing inner ring, a sliding block and a plurality of rolling bodies, the bearing inner ring comprises an inner ring body and an inner ring annular protrusion arranged on the outer circumferential face of the inner ring body, and an outer ring annular groove is formed in the inner circumferential face of the bearing outer ring; the inner ring annular protrusion and the outer ring annular groove are matched to form a first containing space located on one end face side of the inner ring annular protrusion and a second containing space located on the other end face side of the inner ring annular protrusion, and the sliding blocks and the rolling bodies are arranged in the first containing space and the second containing space correspondingly. And a mounting hole for positioning the rolling body is formed in the sliding block. The bearing combines the advantages of a rolling bearing and a sliding bearing, can bear larger axial and radial loads, can realize high-speed stable operation, reduces friction and abrasion, prolongs the service life of the bearing, and reduces the maintenance cost of equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of roll slide composite bearings, belong to bearing technical field. BACKGROUND

[0002] In mechanical transmission system, bearing is one of key components, and its performance directly affects the running stability, precision and life of equipment.

[0003] At present, common bearing is mainly divided into two categories of rolling bearing and sliding bearing. Rolling bearing is through rolling element such as ball, roller etc. between inner race and outer ring, with small friction, easy to start, can bear certain axial and radial load etc. advantage, is widely used in various mechanical equipment. However, in high-speed operation, rolling bearing can generate larger centrifugal force, and the contact stress between rolling element and raceway will also increase, easy to produce fatigue wear and noise, and in heavy load condition, the contact fatigue life of rolling bearing will also decrease significantly.

[0004] And sliding bearing is through the sliding friction between shaft neck and bush to support shaft, and its carrying capacity is stronger, and it runs stably, and can adapt to high-speed heavy load working condition, but the friction coefficient is relatively large, and the friction torque is larger when starting, and it has higher requirement to lubrication condition, and in some equipment that need to be frequently started and stopped, it can cause larger energy loss. In view of the above analysis, the existing rolling bearing and sliding bearing have certain limitations under different working conditions, and for some special working conditions, such as high-speed heavy load and need to be frequently started and stopped, the existing single type bearing is indeed difficult to meet the comprehensive performance requirement, so a new type of bearing structure is needed to overcome the above problems. CONTENT OF UTILITY MODEL

[0005] The utility model provides a kind of roll slide composite bearing in view of the deficiency of prior art.

[0006] The technical scheme that the utility model solves the above technical problem is as follows: a kind of roll slide composite bearing, including bearing outer ring, bearing inner ring, sliding block between bearing outer ring and bearing inner ring and multiple rolling elements;

[0007] The bearing inner ring includes inner ring body and inner ring ring protrusion arranged on the outer circumferential surface of the inner ring body, the inner circumferential surface of the bearing outer ring is provided with outer ring ring groove, the inner ring ring protrusion and the outer ring ring groove cooperate to form the first containing space located at the one end surface side of the inner ring ring protrusion and the second containing space located at the other end surface side of the inner ring ring protrusion, the first containing space and the second containing space are all provided with the sliding block and the rolling element, the sliding block is provided with mounting hole for positioning the rolling element, and the diameter of the rolling surface of the rolling element is greater than the thickness of the sliding block.

[0008] The bearing has the advantages that: the sliding block and the plurality of rolling bodies are arranged in a staggered manner in the circumferential direction, the sliding surface of the rolling body protrudes from the sliding surface of the sliding block, the rolling of the bearing can be dominant in initial starting, and the sliding oil film can be ensured to avoid abnormal wear during starting and stopping; the bearing has strong load bearing capacity, the sliding surface can contact and play a main load bearing role during load bearing after starting, and the operation of the bearing can be supported, and the bearing has high operation reliability.

[0009] On the basis of the above technical scheme, the utility model further can make improvement as follows.

[0010] Further, the bearing outer ring comprises an outer ring A and an outer ring B connected with the outer ring A, the outer ring A is provided with a first ring platform, the outer ring B is provided with a second ring platform, and the first ring platform and the second ring platform cooperate to form the outer ring groove.

[0011] The beneficial effect of the above further scheme is that the structural design of the outer ring facilitates the installation and assembly of the bearing and subsequent maintenance.

[0012] Further, the outer ring A and the outer ring B are connected through fasteners.

[0013] The beneficial effect of the above further scheme is that the fasteners can be multiple, and the connection of the outer ring A and the outer ring B can be realized, and the connection is convenient.

[0014] Further, when the pressure borne by the rolling body exceeds the elastic modulus thereof, the rolling body and the sliding block jointly support, and when the pressure borne by the rolling body is less than the elastic modulus thereof, the rolling body supports alone.

[0015] The beneficial effect of the above further scheme is that the height difference between the rolling surface of the rolling body and the sliding surface of the sliding block depends on the size of the initial starting force of the bearing, and the height difference is also the elastic deformation amount supported by the rolling body, so that the rolling body can meet the support requirement of the operation of the bearing in initial starting. In general application conditions, the force of the bearing in starting is relatively small, and the rolling plays a main role, and with the increase of the force in the working process, the rolling body is compressed to generate elastic strain, and then the sliding block can contact and play a main supporting role, so that the bearing can have the advantages of the rolling bearing and the sliding bearing, and the stable operation of the bearing can be realized.

[0016] Further, the plurality of rolling bodies are uniformly distributed on the sliding block.

[0017] The beneficial effect of the further scheme is that the sliding and rolling are staggered and evenly distributed in the circumferential direction, the bearing has high load capacity, and the high-speed operation is more stable.

[0018] Further, the sliding block is in a circular ring structure.

[0019] The beneficial effect of the further scheme is that the sliding block can be one piece and the whole is in a circular ring structure, which facilitates the assembly of the sliding block.

[0020] Further, the sliding block is in an arc structure, and a plurality of sliding blocks are arranged in the first accommodating space and the second accommodating space.

[0021] The beneficial effect of the further scheme is that the sliding block can be one piece and the whole is in a circular ring structure, which facilitates the assembly of the sliding block.

[0022] Further, the outer ring A and the outer ring B are further provided with a butt joint positioning mechanism.

[0023] The beneficial effect of the further scheme is that the butt joint positioning mechanism can be arranged to ensure the accuracy of the connection position of the outer ring A and the outer ring B, and the butt joint is accurate and fast, facilitating the installation of the bearing outer ring.

[0024] Further, the butt joint positioning mechanism comprises a positioning protrusion and a positioning clamping groove matched with the positioning protrusion, the positioning clamping groove is arranged on the outer ring A or the outer ring B, and the positioning protrusion is arranged on the outer ring B or the outer ring A.

[0025] The beneficial effect of the further scheme is that the positioning protrusion and the positioning clamping groove are matched for rapid positioning, the positioning position is accurate, and the installation of the fastener is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure schematic view of the embodiment 1 of the utility model;

[0027] Figure 2 It is a top view structure schematic view of the embodiment 1 of the utility model;

[0028] Figure 3 It is Figure 2 Structure schematic view along A-A direction;

[0029] Figure 4 It is Figure 3 Local enlarged view of C;

[0030] Figure 5 It is Figure 2 Structure schematic view along B-B direction;

[0031] Figure 6 For Figure 5 the local enlarged view at D;

[0032] Figure 7 For the structure diagram of the first accommodating space and the second accommodating space of the utility model;

[0033] Figure 8 For the three-dimensional structure diagram of the utility model without the outer ring A;

[0034] Figure 9 For Figure 8 the local enlarged view at E;

[0035] Figure 10 For the three-dimensional structure diagram of the utility model from the bottom view angle of the sliding block;

[0036] Figure 11 For Figure 10 the local enlarged view at F;

[0037] Figure 12 For the structure diagram of the embodiment 2 of the utility model;

[0038] Figure 13 For Figure 12 the local enlarged view at G;

[0039] In the figure, 1, bearing outer ring; 11, outer ring A; 12, outer ring B; 13, outer ring ring groove; 14, positioning protrusion; 15, positioning clamping groove; 2, bearing inner ring; 21, inner ring main body; 22, inner ring ring convex; 3, sliding block; 31, mounting hole; 4, rolling body; 5, first accommodating space; 6, second accommodating space. DETAILED DESCRIPTION

[0040] The principles and features of the utility model are described below in combination with examples, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0041] Embodiment 1, as shown in 1- Figure 11 A rolling and sliding composite bearing, comprising a bearing outer ring 1, a bearing inner ring 2, a sliding block 3 arranged between the bearing outer ring 1 and the bearing inner ring 2, and a plurality of rolling bodies 4;

[0042] The bearing inner ring 2 comprises an inner ring body 21 and an inner ring ring protrusion 22 arranged on the outer circumferential surface of the inner ring body 21, and the inner circumferential surface of the bearing outer ring 1 is provided with an outer ring ring groove 13, the inner ring ring protrusion 22 and the outer ring ring groove 13 cooperate to form a first containing space 5 located at one end surface side of the inner ring ring protrusion 22 and a second containing space 6 located at the other end surface side of the inner ring ring protrusion 22, and the first containing space 5 and the second containing space 6 are both provided with the sliding block 3 and the rolling body 4, the sliding block 3 is correspondingly provided with a mounting hole 31 for positioning the rolling body 4, and the diameter of the rolling surface of the rolling body 4 is greater than the thickness of the sliding block 3.

[0043] The bearing outer ring 1 comprises an outer ring A11 and an outer ring B12 connected with the outer ring A11, the outer ring A11 is provided with a first ring table, and the outer ring B12 is provided with a second ring table, and the first ring table and the second ring table are in butt joint to form the outer ring ring groove 13. The structural design of the outer ring facilitates the installation and assembly of the bearing and subsequent maintenance.

[0044] When the rolling body 4 is subjected to pressure exceeding its elastic modulus, the rolling body 4 and the sliding block 3 jointly support, and when the rolling body 4 is subjected to pressure less than its elastic modulus, the rolling body 4 supports alone. The rolling surface of the rolling body 4 protrudes from the upper and lower end surfaces of the sliding block 3. The height difference between the rolling surface of the rolling body 4 and the sliding surface of the sliding block 3 depends on the size of the initial starting force of the bearing, and the height difference is also the elastic deformation amount supported by the rolling body 4, which enables the rolling body 4 to meet the bearing operation requirements in the initial start. In general application conditions, the force is relatively small when the bearing starts, and the rolling body 4 plays a major role. With the increase of the force in the working process, the rolling body 4 is compressed to generate elastic strain, and then the sliding block 3 can contact and bear to play a major supporting role, so that the bearing can have the advantages of rolling bearings and sliding bearings, and the stable operation of the bearing is realized.

[0045] The height difference between the rolling surface of the rolling body and the sliding surface of the sliding block can be one ten-thousandth of the diameter of the rolling body. For example, for a rolling body with a diameter of 50mm, the height difference between the rolling surface of the rolling body and the sliding surface of the sliding block can be 5 microns. The initial support of the rolling body can make the sliding block have an oil film, reduce the starting torque, and generate normal elastic deformation under load, and the sliding block bears force after deformation,

[0046] The outer ring A11 and the outer ring B12 are connected through fasteners. The fasteners can be multiple, which can realize the connection of the outer ring A11 and the outer ring B12, and the connection is convenient.

[0047] The outer ring A11 or the outer ring B12 is provided with a stepped through hole for mounting the fastener, and the outer ring B12 or the outer ring A11 is provided with a threaded hole for connecting with the rod part of the fastener. The head part of the fastener can sink into the stepped through hole, and will not affect the installation of the bearing on the equipment.

[0048] Multiple rolling elements 4 are evenly distributed on the sliding block 3. The sliding and rolling elements are arranged alternately, with each element evenly distributed in the circumferential direction, resulting in strong bearing capacity and smoother high-speed operation.

[0049] The sliding block 3 has a circular ring structure. The sliding block 3 can be a single piece with an overall circular ring structure, which facilitates the assembly of the sliding block 3.

[0050] Example 2, as Figure 12 and Figure 13 As shown, a docking and positioning mechanism is also provided between the outer ring A11 and the outer ring B12. In order to ensure the accuracy of the connection position between the outer ring A11 and the outer ring B12, a docking and positioning mechanism can also be set, which makes the docking accurate and fast, and facilitates the installation of the bearing outer ring 1.

[0051] The docking and positioning mechanism includes a positioning protrusion 14 and a positioning slot 15 adapted to the positioning protrusion 14. The positioning slot 15 is disposed on the outer ring A11 or the outer ring B12, and the positioning protrusion 14 is disposed on the outer ring B12 or the outer ring A11. Figure 11 As shown, the outer ring A11 is provided with a positioning groove 15, and the outer ring B12 is provided with a positioning protrusion 14. The engagement of the positioning protrusion 14 with the positioning groove 15 enables quick positioning and docking of the bearing outer ring, ensuring accurate positioning and facilitating the installation of fasteners. The remaining structure is the same as in Embodiment 1, and will not be described further here.

[0052] In Embodiment 3, the sliding block 3 has an arc-shaped structure, and multiple sliding blocks 3 are provided in the first and second accommodating spaces. The sliding block 3 can also consist of multiple blocks, which, when assembled, form a ring-shaped structure adapted to the annular mounting space. This structure facilitates subsequent maintenance of the sliding block 3. The remaining structure is the same as in Embodiment 1 and will not be described further here.

[0053] This utility model bearing has a low starting torque. During initial startup, rolling dominates and a sliding oil film is maintained, preventing abnormal wear during start-up and shutdown. The bearing has a high load-bearing capacity; during load-bearing operation after startup, the sliding surface contact plays a major role in load bearing, resulting in high reliability. The number and size of the rolling elements, the area of ​​the sliding surface, and the parameters of the lubrication system can be adjusted according to different operating conditions to meet the performance requirements of different equipment, demonstrating strong adaptability and versatility.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hybrid bearing, characterized by, The bearing outer ring (1), the bearing inner ring (2), the sliding block (3) arranged between the bearing outer ring (1) and the bearing inner ring (2), and a plurality of rolling bodies (4) are included. The bearing inner ring (2) comprises an inner ring body (21) and an inner ring ring protrusion (22) arranged on the outer circumferential surface of the inner ring body (21). An inner ring ring groove (13) is arranged on the inner circumferential surface of the bearing outer ring (1). The inner ring ring protrusion (22) and the inner ring ring groove (13) cooperate to form a first accommodating space (5) on one end surface side of the inner ring ring protrusion (22) and a second accommodating space (6) on the other end surface side of the inner ring ring protrusion (22). The sliding block (3) and the rolling body (4) are arranged in the first accommodating space (5) and the second accommodating space (6). The sliding block (3) is provided with a mounting hole (31) for positioning the rolling body (4). The diameter of the rolling surface of the rolling body (4) is greater than the thickness of the sliding block (3).

2. The hybrid bearing of claim 1, wherein, The bearing outer ring (1) comprises an outer ring A (11) and an outer ring B (12) connected with the outer ring A (11). The outer ring A (11) is provided with a first ring table, and the outer ring B (12) is provided with a second ring table. The first ring table and the second ring table cooperate to form the outer ring ring groove (13).

3. The hybrid bearing of claim 2, wherein, The outer ring A (11) and the outer ring B (12) are connected by a fastener.

4. The hybrid bearing of claim 1, wherein, When the rolling body (4) is subjected to pressure exceeding its elastic modulus, the rolling body (4) and the sliding block (3) jointly support. When the rolling body (4) is subjected to pressure less than its elastic modulus, the rolling body (4) supports alone.

5. The hybrid bearing of claim 1, wherein, A plurality of rolling bodies (4) are uniformly distributed on the sliding block (3).

6. The hybrid bearing of any of claims 1-5, wherein, The sliding block (3) is a circular ring structure.

7. The combined rolling and sliding bearing according to any one of claims 1 to 5, characterized in that The sliding block (3) is an arc structure, and a plurality of sliding blocks (3) are arranged in the first accommodating space (5) and the second accommodating space (6).

8. The combined rolling and sliding bearing according to any one of claims 1 to 5, characterized in that The outer ring A (11) and the outer ring B (12) are further provided with a butt joint positioning mechanism.

9. The hybrid bearing of claim 8, wherein, The butt joint positioning mechanism comprises a positioning protrusion (14) and a positioning clamping groove (15) matched with the positioning protrusion (14). The positioning clamping groove (15) is arranged on the outer ring A (11) or the outer ring B (12), and the positioning protrusion (14) is arranged on the outer ring B (12) or the outer ring A (11).

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