Self-lubricating composite shaft sleeve

Abstract

The utility model provides a self-lubricating composite shaft sleeve, and belongs to the technical field of shaft sleeves. A self-lubricating composite shaft sleeve comprises a copper sleeve, a plurality of through holes are formed in the copper sleeve, graphite columns are arranged in the through holes, and the graphite columns can move along the axes of the through holes; the split type outer sleeve structure is arranged on the copper sleeve in a sleeving mode, a plurality of grooves corresponding to the through holes are formed in the split type outer sleeve structure, and springs are installed in the grooves; the split type outer sleeve structure coaxially rotates relative to the copper sleeve, so that the springs are in one-to-one correspondence with the graphite columns or the springs and the graphite columns are staggered. The utility model has the advantage that the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of axle sleeve, especially a self -lubricating composite axle sleeve. BACKGROUND

[0002] Traditional axle sleeve is generally made of copper alloy, stainless steel and other metal materials, and the main function is to reduce the friction between rotating parts and prolong the service life of mechanical system. However, in the environment of high load, high speed or long time continuous operation, the large friction coefficient of traditional axle sleeve can easily cause serious wear and heating problem, which not only reduces the equipment operation efficiency, but also shortens its service life.

[0003] Graphite bearing belongs to self-lubricating bearing, and is widely used in specific application scenarios due to excellent wear resistance and high temperature stability. The friction coefficient of graphite material is low, and good lubrication can also be realized under dry friction condition.

[0004] However, the graphite bearing sleeve is in direct contact with the shaft during work and moves relatively, even if the graphite has self-lubricating properties, long-term friction will still cause the surface material of the sleeve to gradually wear. And when the bearing load is large, the heat generated by friction increases, which will further aggravate the wear of graphite material.

[0005] In this way, the load part of the graphite will be greatly worn, and the other positions will be less worn due to the inability to contact the shaft, which makes the lubrication effect worse, and the service life of the graphite bearing is difficult to achieve the expected. SUMMARY

[0006] The utility model discloses a self-lubricating composite axle sleeve, which has the characteristics of improving the service life.

[0007] The utility model discloses a self-lubricating composite axle sleeve, which has the characteristics of improving the service life.

[0008] A self-lubricating composite axle sleeve, comprising:

[0009] A copper sleeve is provided with a plurality of through holes, and a graphite column is arranged in each through hole, and the graphite column can move along the axis of the through hole.

[0010] A split sleeve structure is sleeved on the copper sleeve, a plurality of grooves corresponding to the through holes are formed on the split sleeve structure, and a spring is installed in each groove.

[0011] The split sleeve structure rotates coaxially relative to the copper sleeve, so that the spring is one-to-one corresponding to the graphite column or the spring is dislocated with the graphite column.

[0012] In the self-lubricating composite shaft sleeve, the end of the split sleeve structure has a limiting outer edge, and the copper sleeve can abut against the limiting outer edge.

[0013] In the self-lubricating composite shaft sleeve, the end of the copper sleeve is provided with at least one limiting hole, the limiting outer edge is provided with a threaded hole corresponding to the limiting hole, and a bolt is threadedly connected to the threaded hole, and the end of the bolt can enter the limiting hole to limit the rotation of the copper sleeve and the split sleeve structure.

[0014] In the self-lubricating composite shaft sleeve, the limiting outer edge has an extension extending outward from the limiting outer edge, and the extension is provided with a connecting hole arranged in a circumferential array on the limiting outer edge.

[0015] In the self-lubricating composite shaft sleeve, the split sleeve structure includes a first sleeve body and a second sleeve body, the first sleeve body is provided with a receiving hole, and the second sleeve body is sleeved outside the first sleeve body to close the receiving hole and form a groove.

[0016] In the self-lubricating composite shaft sleeve, the first sleeve body and the second sleeve body are welded together.

[0017] In the self-lubricating composite shaft sleeve, the split sleeve structure is made of stainless steel.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] By rotating the split sleeve structure relative to the copper sleeve, the spring and the graphite column can be corresponded or dislocated, thereby enhancing the lubricating effect, or facilitating the installation of the graphite bearing. In the working condition of high load, high speed and large friction of the shaft sleeve, the spring can be adjusted to correspond to the graphite column to increase the lubricating force of the graphite column on the shaft. Before the rotating shaft is inserted, the spring and the graphite column can be dislocated to avoid affecting the insertion and installation of the rotating shaft. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view structure in the present application;

[0021] Figure 2 is Figure 1 is a sectional view structure of position A-A in

[0022] Figure 3 is a structure schematic diagram of the spring and the graphite column in the present application after dislocation;

[0023] In the drawings,

[0024] 2, copper sleeve; 21, through hole; 22, graphite column; 23, limiting hole;

[0025] 3, split sleeve structure; 31, groove; 32, spring; 33, limiting outer edge; 331, screw hole; 332, connecting hole; 34, first sleeve body; 35, second sleeve body. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] As shown in the drawings, Figures 1 to 3 A self-lubricating composite sleeve includes a copper sleeve 2 and a split sleeve structure 3. A plurality of through holes 21 are formed in the copper sleeve 2, and graphite columns 22 are arranged in the through holes 21 and can move along the axis of the through holes 21. The split sleeve structure 3 is sleeved on the copper sleeve 2, and a plurality of grooves 31 corresponding to the through holes 21 are formed in the split sleeve structure 3, and springs 32 are arranged in the grooves 31. The split sleeve structure 3 rotates coaxially relative to the copper sleeve 2 so that the springs 32 correspond to the graphite columns 22 or the springs 32 are dislocated from the graphite columns 22.

[0028] When the sleeve is in a working state, the shaft rotates in the copper sleeve 2. Since a plurality of through holes 21 are formed in the copper sleeve 2, and the graphite columns 22 arranged in the through holes 21 can move along the axis. At this time, the split sleeve structure 3 can rotate relative to the copper sleeve 2. When the split sleeve structure 3 is rotated to a specific position, so that the springs 32 in the grooves 31 of the split sleeve structure 3 correspond to the graphite columns 22 one by one, the springs 32 will exert pressure on the graphite columns 22, and the graphite columns 22 will be pushed out in the direction of the shaft, so that the graphite columns 22 are in closer contact with the shaft, and the lubrication effect is enhanced.

[0029] By rotating the split sleeve structure 3 relative to the copper sleeve 2, the springs 32 correspond to the graphite columns 22 or are dislocated, thereby enhancing the lubrication effect or facilitating the installation of the graphite bearing. In the working condition of high load, high speed and large friction of the sleeve, the springs 32 can be adjusted to correspond to the graphite columns 22, and the lubrication force of the graphite columns 22 on the shaft is increased. Before the shaft is inserted, the springs 32 can be dislocated from the graphite columns 22 to avoid affecting the insertion and installation of the shaft.

[0030] Further, the graphite columns 22 are in frictional contact with the inner walls of the through holes 21.

[0031] Specifically, the end of the split sleeve structure 3 has a limiting outer edge 33, and the copper sleeve 2 can abut against the limiting outer edge 33.

[0032] The limiting outer edge 33 at the end of the split sleeve structure 3 provides a clear positioning reference for the installation of the copper sleeve 2. During assembly, the staff only needs to abut the copper sleeve 2 against the limiting outer edge 33, so as to quickly and accurately determine the axial position of the copper sleeve 2 in the split sleeve structure 3.

[0033] Specifically, the upper end of the copper sleeve 2 is provided with at least one limiting hole 23, and the limiting outer edge 33 is provided with a threaded hole 331 corresponding to the limiting hole 23, and a bolt is threadedly connected to the threaded hole 331, and the end of the bolt can enter the limiting hole 23 to limit the rotation of the copper sleeve 2 and the split sleeve structure 3.

[0034] During the operation of the shaft sleeve, the high-speed rotation of the shaft and various complex forces generated during the operation of the mechanical system may cause relative rotation between the copper sleeve 2 and the split sleeve structure 3. By providing the limiting hole 23 at the upper end of the copper sleeve 2 and the threaded hole 331 in the limiting outer edge 33 and using the bolt to connect them, when the end of the bolt enters the limiting hole 23, a strong mechanical constraint is formed, effectively preventing the relative rotation between the copper sleeve 2 and the split sleeve structure 3.

[0035] Specifically, the limiting outer edge 33 has an extension extending outwardly from the limiting outer edge 33, and the extension is provided with a plurality of connecting holes 332 arranged in a circumferential array on the limiting outer edge 33.

[0036] The plurality of connecting holes 332 arranged in a circumferential array on the limiting outer edge 33 enable the shaft sleeve to be fastened at multiple points when connected to the bearing seat.

[0037] Specifically, the split sleeve structure 3 includes a first sleeve body 34 and a second sleeve body 35, the first sleeve body 34 is provided with a receiving hole, and the second sleeve body 35 is arranged outside the first sleeve body 34 to close the receiving hole and form the groove 31.

[0038] The split sleeve structure 3 is designed as a combination of the first sleeve body 34 and the second sleeve body 35, so that when the graphite column 22 is installed, the assembler can first place the graphite column 22 in the receiving hole of the first sleeve body 34. This step-by-step operation of placing the graphite column 22 first and then installing the second sleeve body 35 greatly reduces the installation difficulty compared to installing the graphite column 22 in a split sleeve structure 3 of a whole closed structure.

[0039] The ends of the first sleeve body 34 and the second sleeve body 35 are combined to form the limiting outer edge 33.

[0040] Specifically, the first sleeve body 34 and the second sleeve body 35 are welded together.

[0041] Specifically, the split sleeve structure 3 is made of stainless steel material.

[0042] The first sleeve body 34 and the second sleeve body 35 are both made of stainless steel material.

[0043] It should be noted that all directional indications, such as upper, lower, left, right, front, rear, etc., are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, such as shown in the drawings, and if the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. Meanwhile, the meaning of "and / or" appearing throughout the text is to include three schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0045] The above components are all general standard components or components known to those skilled in the art, and their structure and principle can be known by those skilled in the art through technical manuals or through conventional experimental methods.

[0046] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the present application or exceed the scope defined by the appended claims.

Claims

1. A self-lubricating composite bushing, characterized by, The application relates to a copper sleeve (2) provided with a plurality of through holes (21), wherein graphite columns (22) are arranged in the through holes (21) and can move along the axes of the through holes (21); a split sleeve structure (3) is arranged on the copper sleeve (2), the split sleeve structure (3) is provided with a plurality of grooves (31) corresponding to the through holes (21), and springs (32) are arranged in the grooves (31). The split sleeve structure (3) is coaxially rotated relative to the copper sleeve (2) so that the springs (32) are one-to-one corresponding to the graphite columns (22) or the springs (32) are dislocated from the graphite columns (22). The end of the split sleeve structure (3) is provided with a limiting outer edge (33), and the copper sleeve (2) can abut against the limiting outer edge (33). At least one limiting hole (23) is arranged at the upper end of the copper sleeve (2), a screw hole (331) is arranged on the limiting outer edge (33), the screw hole (331) can correspond to the limiting hole (23), a bolt is screw-connected at the screw hole (331), and the end of the bolt can enter the limiting hole (23) so as to limit the rotation of the copper sleeve (2) and the split sleeve structure (3).

2. The self-lubricating composite bushing of claim 1, wherein, The limiting outer edge (33) is provided with an extension part extending towards the outside of the limiting outer edge (33), and the extension part is also provided with a plurality of connecting holes (332) arranged in a circumferential array on the limiting outer edge (33).

3. The self-lubricating composite bushing of claim 2, wherein, The split sleeve structure (3) comprises a first sleeve body (34) and a second sleeve body (35), the first sleeve body (34) is provided with a containing hole, and the second sleeve body (35) is arranged outside the first sleeve body (34) to close the containing hole and form the groove (31).

4. The self-lubricating composite bushing of claim 3, wherein, The first sleeve body (34) and the second sleeve body (35) are welded.

5. The self-lubricating composite bushing of claim 1, wherein, The split sleeve structure (3) is made of stainless steel.

6. The self-lubricating composite bushing of claim 5, wherein, ​ 7. The self-lubricating composite bushing of claim 1, wherein, ​

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