Bearing spacer sleeve

Abstract

The utility model relates to the field of bearing sleeves, in particular to a bearing spacer sleeve. The bearing bush is mounted in the bearing box, is of an annular structure with a through hole, is arranged on the rotating shaft in a sleeving manner, and is propped against the end parts of the pair of bearings along the two axial ends respectively; two groups of convex rings are arranged at openings at two ends of the through hole around the axis, any group of convex rings is provided with a plurality of convex rings along the axis direction, and the plurality of convex rings form a labyrinth structure, so that a cavity which is sealed along the axial direction is formed between the two groups of convex rings relative to the outside. The multiple convex rings are arranged at the openings in the two ends of the through hole to form the labyrinth structure, the flowing area of lubricating grease on the bearing on the rotating shaft is limited, the situation that the lubricating grease is excessively diffused in the axial direction of the rotating shaft is avoided, normal lubrication of the bearing is ensured, and waste of the lubricating grease is reduced.

Description

Technical Field

[0001] This utility model relates to the field of bearing kits, and more particularly to a bearing spacer sleeve. Background Art

[0002] In mechanical transmission systems, bearings are key components that support and transmit loads, and their operational stability and durability are crucial to the overall system performance. Bearing spacers, as an important component in bearing assembly, are widely used within bearing housings to separate and support bearings, ensuring their smooth operation.

[0003] In the existing technology, during the rotation of the bearing, the grease on it is easy to fall onto the shaft due to factors such as centrifugal force and spread along the axis. This may not only lead to the waste of grease, but also have an adverse effect on the operation of the bearing and the shaft. Utility Model Content

[0004] The purpose of this invention is to provide a bearing spacer sleeve to solve the problem in the prior art that the grease on the bearing can easily flow to other positions along the shaft.

[0005] The technical solution of this utility model is: a bearing spacer sleeve, installed in the bearing housing, configured as an annular structure with a through hole and sleeved on the rotating shaft, with its two ends along the axial direction respectively abutting the ends of a pair of bearings; two sets of convex rings are arranged around the axis at the openings at both ends of the through hole, and any set of convex rings is configured as multiple channels along the axial direction, and the multiple channels of convex rings form a labyrinth structure, so that a cavity is formed between the two sets of convex rings relative to the outside in an axially sealed manner.

[0006] Preferably, the outer wall located in the middle is recessed inward relative to the outer wall located at the end, so that the outer wall located at the end has a larger diameter than the outer wall located in the middle; a side hole is provided in the middle, the side hole penetrates the middle radially, so that the chamber communicates with the outside.

[0007] Preferably, a ventilation space is formed between the outer wall of the middle section and the inner wall of the bearing housing, and the outer wall of the rotating shaft, the side hole, and the ventilation space form a ventilation channel for heat dissipation of the rotating shaft.

[0008] Preferably, at least one end of the outer wall is provided with a blind hole around the axis, any one of the blind holes is arranged radially, and a connecting hole is opened axially corresponding to any one of the blind holes, the end of the connecting hole away from the blind hole is provided with the rolling element of the bearing; the blind hole and the connecting hole cooperate with the oil injection hole opened on the bearing housing to form a lubricant injection channel.

[0009] Preferably, an annular groove is provided around the top of the blind hole along the axis, and the annular groove enables the blind hole at any angle around the axis to communicate with the oil injection hole on the bearing housing.

[0010] Preferably, a set of sealing mechanisms is provided on the outer wall at both ends around the axis, and each set of sealing mechanisms includes a sealing groove and a sealing ring that is matched therewith, and the ventilation space is formed between the two sets of sealing mechanisms.

[0011] Preferably, at least one end face has a bottom hole along the axial direction, and the bottom hole forms an accommodating space with the adjacent bearing.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] (1) This application forms a labyrinth structure by setting multiple raised rings at the openings at both ends of the through hole, which restricts the flow area of ​​the grease on the bearing on the rotating shaft, avoids excessive diffusion of the grease along the axial direction of the rotating shaft, ensures normal lubrication of the bearing and reduces the waste of grease.

[0014] (2) The special recessed design of the middle outer wall, combined with the side holes, creates an efficient heat dissipation channel. The heat of the shaft can be directly dissipated through the side holes. At the same time, the ventilation space between the middle outer wall and the inner wall of the bearing housing promotes airflow, further enhancing the heat dissipation effect and extending the service life of the bearing and shaft.

[0015] (3) By setting blind holes, connecting holes, and annular groove structures, a grease filling channel is formed from the outside to the inside of the bearing, which not only simplifies the grease filling process but also improves the flexibility and accuracy of filling. The annular groove also reduces the assembly difficulty and allows different rotation angles between the bearing spacer and the shaft, increasing the convenience of installation. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the bearing spacer assembly according to the present invention;

[0018] Figure 2 This is a structural diagram of a bearing spacer sleeve according to the present invention;

[0019] Figure 3 This is a cross-sectional view of a bearing spacer sleeve according to the present invention;

[0020] Figure 4 for Figure 1 Enlarged view at point A;

[0021] Among them: 100, bearing spacer sleeve, 11, bearing housing, 12, rotating shaft, 13, bearing, 14, oil injection hole, 2, convex ring, 3, side hole, 4, sealing mechanism, 51, blind hole, 52, connecting hole, 53, annular groove, 6, bottom hole. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to specific embodiments:

[0023] like Figure 1 As shown, a bearing spacer sleeve 100 is installed inside a bearing housing 11. A through hole is opened in the middle coaxially with its own axis, and it is sleeved on a rotating shaft 12 through the through hole. A pair of bearings 13 are respectively abutted at both ends along the axial direction.

[0024] The bearing 13 is coated with grease. During the rotation of the bearing 13, the grease easily falls onto the shaft 12 and flows axially along the shaft 12 towards other locations. Therefore, as... Figures 2-3 As shown, in this application, for a pair of bearings 13, two sets of convex rings 2 are arranged around the axis at the openings at both ends of the through hole. Any set of convex rings 2 is arranged in multiple rows along the axial direction of the rotating shaft 12. The multiple rows of convex rings 2 form a labyrinth structure, so that the two sets of convex rings 2 form an axially sealed chamber relative to the outside, thereby restricting the flow area of ​​the grease on the bearing 13 on the rotating shaft 12.

[0025] During operation, the rotating shaft 12 generates heat due to prolonged rotation. Therefore, the outer wall in the middle is recessed inwards relative to the outer wall at the ends, resulting in a larger diameter at the ends compared to the outer wall in the middle. A side hole 3 is provided in the middle, extending radially through it, allowing the chamber to communicate with the outside and dissipate heat from the rotating shaft 12. Furthermore, a ventilation space is formed between the outer wall in the middle and the inner wall of the bearing housing 11, containing air at room temperature. This creates a ventilation channel for heat dissipation from the rotating shaft 12, consisting of the outer wall of the rotating shaft 12, the side hole 3, and the ventilation space. Additionally, a set of sealing mechanisms 4 is provided around the axis on the outer walls at both ends. Each set of sealing mechanisms 4 includes a sealing groove and a mating sealing ring. The ventilation space is formed between the two sets of sealing mechanisms 4, allowing airflow to follow a predetermined radial direction along the rotating shaft 12.

[0026] In addition, if Figures 2-4 As shown, at least one end of the outer wall is provided with a blind hole 51 around the axis. Any blind hole 51 is arranged radially along the shaft 12, and a connecting hole 52 is opened along the shaft 12 to communicate with the blind hole 51. The end of the connecting hole 52 away from the blind hole 51 is provided with the rolling element between the outer ring and the inner ring of the bearing 13. An oil injection hole 14 is also provided on the bearing housing 11, so that the oil injection hole 14, the blind hole 51 and the connecting hole 52 cooperate to form an injection channel for adding grease to the bearing 13 from the outside.

[0027] In a preferred embodiment of this application, an annular groove 53 is formed at the top of the blind hole 51 around the axis of the rotating shaft 12. At this time, the starting section of the blind hole 51 is located in the annular groove 53, so that the inner wall of the annular cavity formed by the annular groove 53 communicates with multiple blind holes 51, and the outer wall of the annular cavity is also connected to the oil injection hole 14. This allows any blind hole 51 to be coaxial with the oil injection hole 14 or to have a radially overlapping projection. The grease injected from the oil injection hole 14 can also flow into the blind hole 51 through the annular groove 53, reducing assembly requirements and allowing the bearing spacer sleeve 100 to have different rotation angles relative to the rotating shaft 12.

[0028] In this embodiment, at least one end face is provided with a bottom hole 6 along the axial direction, and a receiving space is formed between the bottom hole 6 and the adjacent bearing 13. The receiving space is used to accommodate the nut sleeved on the shoulder of the rotating shaft 12.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A bearing spacer sleeve, installed inside a bearing housing (11), configured as an annular structure with a through hole and sleeved on a rotating shaft (12), with its two ends along the axial direction respectively abutting against the ends of a pair of bearings (13); characterized in that, Two sets of convex rings (2) are arranged around the openings at both ends of the through hole along the axis. Any set of convex rings (2) is arranged in multiple channels along the axial direction. The multiple channels of convex rings (2) form a labyrinth structure, so that the two sets of convex rings (2) form an axially sealed chamber relative to the outside.

2. The bearing spacer sleeve according to claim 1, characterized in that, The outer wall located in the middle is recessed inward relative to the outer wall located at the end, so that the outer wall located at the end has a larger diameter than the outer wall located in the middle; a side hole (3) is provided in the middle, and the side hole (3) penetrates the middle radially, so that the chamber communicates with the outside.

3. A bearing spacer sleeve according to claim 2, characterized in that, The outer wall of the middle part forms a ventilation space between the outer wall and the inner wall of the bearing housing (11). The outer wall of the rotating shaft (12), the side hole (3) and the ventilation space form a ventilation channel for the rotating shaft (12) to dissipate heat.

4. A bearing spacer sleeve according to claim 1, characterized in that, At least one end of the outer wall is provided with a blind hole (51) around the axis. Any blind hole (51) is arranged radially, and a connecting hole (52) is provided axially for any blind hole (51). The end of the connecting hole (52) away from the blind hole (51) is provided for the rolling element of the bearing (13). The blind hole (51) and the connecting hole (52) cooperate with the oil injection hole (14) opened on the bearing housing (11) to form a lubricant injection channel.

5. A bearing spacer sleeve according to claim 4, characterized in that, A groove (53) is provided around the top of the blind hole (51) around the axis. The groove (53) allows the blind hole (51) at any angle around the axis to communicate with the oil injection hole (14) on the bearing housing (11).

6. A bearing spacer sleeve according to claim 3, characterized in that, A set of sealing mechanisms (4) are respectively provided on the outer wall at both ends around the axis. Each set of sealing mechanisms (4) includes a sealing groove and a sealing ring that is matched. The ventilation space is formed between the two sets of sealing mechanisms (4).

7. A bearing spacer sleeve according to claim 1, characterized in that, At least one end face has a bottom hole (6) along the axial direction, and the bottom hole (6) forms an accommodating space with the adjacent bearing (13).

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