Composite shaft sleeve

Abstract

The utility model discloses a composite shaft sleeve which comprises an inner shaft sleeve and an outer shaft sleeve which are coaxially arranged, the outer shaft sleeve rotates relative to the inner shaft sleeve, a plurality of rows of graphite holes which are arranged at intervals in the axial direction are distributed on the periphery of the inner shaft sleeve, graphite columns are embedded in the graphite holes, and the outer ends of the graphite columns are provided with graphite ball heads extending out of hole openings. The inner wall face of the outer shaft sleeve is provided with adjusting grooves matched with the graphite ball heads in a one-to-one mode, the adjusting grooves extend in the anticlockwise direction in the circumferential direction of the outer shaft sleeve, the graphite ball heads are embedded into the adjusting grooves, and the depth of the adjusting grooves is reduced in the extending direction. A plurality of limiting grooves which are arranged at equal-interval included angles in the circumferential direction are formed in the periphery of the outer wall face of the outer shaft sleeve, a ball plunger is connected to the outer shaft sleeve in a threaded mode, and a ball part on the ball plunger is embedded into one limiting groove. The composite shaft sleeve has the characteristics of continuous lubrication and long service life, and is complete in overall function and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, and more particularly to a composite shaft sleeve. Background Art

[0002] A shaft sleeve with graphite columns embedded in its walls has a self-lubricating function. It uses fine graphite particles worn off the columns as a lubricant to achieve continuous lubrication. However, these fine graphite particles are lost during shaft rotation. Furthermore, as the columns wear, their height decreases, and they no longer maintain continuous contact with the shaft. Consequently, the shaft cannot be continuously supplied with the fine graphite particles for lubrication, resulting in a loss of the sleeve's inherent self-lubricating function and poor overall performance. Accordingly, the present invention proposes a composite shaft sleeve. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and provide a composite shaft sleeve having the characteristics of continuous lubrication and long service life.

[0004] In order to solve the above technical problems, the purpose of the present invention is achieved as follows: the composite sleeve involved in the present invention comprises an inner sleeve and an outer sleeve arranged coaxially, the outer sleeve rotates relative to the inner sleeve, and the inner sleeve is provided with several rows of graphite holes arranged at intervals along the axial direction. Graphite columns are embedded in the graphite holes, and the outer ends of the graphite columns have graphite ball heads extending out of the holes. The inner wall surface of the outer sleeve is provided with adjustment grooves that match the graphite ball heads one by one. The adjustment grooves extend counterclockwise along the circumference of the outer sleeve, and the graphite ball heads are embedded in the adjustment grooves. The depth of the adjustment grooves decreases along the extension direction.

[0005] The utility model is further configured as follows: a plurality of limiting grooves are arranged at equal intervals and angles along the circumferential direction on the outer wall surface of the outer sleeve; a ball plunger is threadedly connected to the outer sleeve; and the ball head on the ball plunger is embedded in one of the limiting grooves.

[0006] The utility model is further configured as follows: the limiting groove is spherical.

[0007] The utility model is further configured as follows: the ball plunger is buried in the outer shaft sleeve.

[0008] The utility model is further configured as follows: a plurality of inner rotation holes with adjacent equal angles are distributed around one end of the inner sleeve, a plurality of outer rotation holes with adjacent equal angles are distributed around one end of the outer sleeve, and the outer rotation holes and the inner rotation holes are arranged on different sides.

[0009] The utility model is further configured to include: a first turning tool and a second plate turning tool;

[0010] The first turning tool includes a first turning seat, on which there is an inner turning column matching the inner turning hole, and a first turning handle for driving rotation is also provided on the first turning seat; the second turning tool includes a second turning seat, on which there is an outer turning column matching the outer turning hole, and a second turning handle for driving rotation is also provided on the second turning seat.

[0011] In summary, the present utility model has the following beneficial effects:

[0012] 1. During the rotation of the outer shaft sleeve relative to the inner shaft sleeve, the worn and shortened graphite column can further extend to provide continuous lubrication, thereby prolonging the service life of the shaft and the shaft sleeve.

[0013] 2. When the inner and outer shaft sleeves rotate relative to each other for adjustment, a gear structure is provided between them to make the single adjustment accurate and reliable.

[0014] 3. Tools for realizing the relative rotation of the inner and outer shaft sleeves are configured, which is convenient for adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure from another perspective of the present utility model;

[0017] Figure 3 is a schematic diagram of a partial structure of the present utility model;

[0018] Figure 4 is a schematic diagram of the present utility model for showing the structures of the first turning tool and the second turning tool. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the preferred implementation schemes of the present utility model will be described below in conjunction with specific embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the present utility model, rather than limiting the patent requirements of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] The present utility model will be further described below in conjunction with the drawings and preferred embodiments.

[0021] Embodiment 1

[0022] See Figures 1 to 3As shown in the figure, a composite bushing involved in this embodiment includes an inner bushing 1 and an outer bushing 2 arranged coaxially. The outer bushing 2 rotates relative to the inner bushing 1. A number of columns of graphite holes (not marked) are circumferentially arranged at intervals along the axial direction on the inner bushing 1. Graphite columns 3 are embedded in the graphite holes. The outer ends of the graphite columns 3 have graphite ball heads 31 protruding from the hole openings. Adjustment grooves 4 that match the graphite ball heads one by one are provided on the inner wall surface of the outer bushing 2. The adjustment grooves 4 extend counterclockwise along the circumferential direction of the outer bushing 2. The graphite ball heads 31 are embedded in the adjustment grooves 4, and the depth of the adjustment grooves 4 decreases along the extension direction.

[0023] Furthermore, a number of inner turning holes 7 with equal adjacent interval angles are circumferentially arranged at one end of the inner bushing 1, and a number of outer turning holes 8 with equal adjacent interval angles are circumferentially arranged at one end of the outer bushing 2. The outer turning holes 8 and the inner turning holes 7 are arranged on different sides.

[0024] In this implementation scheme, when the graphite column 3 wears and becomes shorter, and the shaft rotating in the bushing can no longer contact the graphite column 3, the outer bushing 2 can be rotated relative to the inner bushing 1 until the adjustment groove 4 moves circumferentially, laterally pushing the graphite ball head 31. The graphite ball head 31 drives the graphite column 3 to move inward to compensate for the worn part of the graphite column, so that the shaft rotating in the bushing can contact the graphite column 3 again to provide continuous lubrication.

[0025] Embodiment 2

[0026] See Figures 1 to 4 As shown in the figure, a composite bushing involved in this embodiment, on the basis of Embodiment 1, is further provided that a number of limiting grooves 5 are circumferentially arranged at equal interval angles on the outer wall surface of the outer bushing 2. A ball head plunger 6 is threadedly connected to the outer bushing 2, and the ball head part on the ball head plunger 6 is embedded in one of the limiting grooves 5.

[0027] Furthermore, the limiting grooves 5 are spherical.

[0028] Furthermore, the ball head plunger 6 is buried in the outer bushing 2.

[0029] In this implementation scheme, through the arrangement of the limiting grooves 5 and the ball head plunger 6, after the outer bushing 2 is rotated a certain circumferential angle once, the ball head part on the ball head plunger 6 will snap into another limiting groove 5 to play a role of rotational positioning and gear shifting, thereby controlling the circumferential angle of a single rotation and ensuring that the supplementary height of the graphite column 3 is controllable after a single adjustment is completed.

[0030] Embodiment 3

[0031] See Figures 1 to 4As shown in the figure, a composite bushing involved in this embodiment is further provided with a first turning tool and a second turning tool on the basis of Embodiments 1 and 2. The first turning tool includes a first turning seat 9, on which there is an inner turning column 10 matching the inner turning hole, and a first turning handle 11 for driving rotation is also provided on the first turning seat 9. The second turning tool includes a second turning seat 12, on which there is an outer turning column 13 matching the outer turning hole, and a second turning handle 14 for driving rotation is also provided on the second turning seat 12.

[0032] In this embodiment, by using the external first turning tool and the second turning tool, with the inner turning column 10 inserted into the inner turning hole and the outer turning column 13 inserted into the outer turning hole, and by relatively rotating the first turning tool and the second turning tool, the outer bushing 2 can be rotated relative to the inner bushing 1.

[0033] Regarding the composite bushing involved in the present utility model, during the process of the outer bushing rotating relative to the inner bushing, the worn and shortened graphite column of the composite bushing can further extend to provide continuous lubrication and extend the service life of the shaft and the bushing. When the inner and outer bushings are relatively rotated and adjusted, a gear structure is provided between them to make the single adjustment accurate and reliable. And tools for realizing the relative rotation of the inner and outer bushings are configured, which is convenient for adjustment. The overall function is perfect and the practicability is strong.

[0034] Unless otherwise clearly specified and defined, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the actual shown orientation or positional relationship. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present utility model are only used for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood in combination with the embodiments and according to the specific circumstances.

[0035] Unless otherwise clearly specified and defined, in the present utility model, if there are terms such as "set", "connected" and "connected", they 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 direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0036] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in this technical field based on the concept of the present utility model through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A composite bushing, characterized in that, It includes an inner shaft sleeve and an outer shaft sleeve arranged coaxially. The outer shaft sleeve rotates relative to the inner shaft sleeve. A number of columns of graphite holes are circumferentially arranged on the inner shaft sleeve at intervals along the axial direction. Graphite columns are embedded in the graphite holes. The outer ends of the graphite columns have graphite ball heads protruding from the hole openings. Adjusting grooves are provided on the inner wall surface of the outer shaft sleeve and are in one-to-one correspondence with the graphite ball heads. The adjusting grooves extend counterclockwise along the circumferential direction of the outer shaft sleeve. The graphite ball heads are embedded in the adjusting grooves. The depth of the adjusting grooves decreases along the extending direction.

2. The composite bushing according to claim 1, wherein, A number of limiting grooves are circumferentially arranged on the outer wall surface of the outer shaft sleeve at equal angular intervals along the circumferential direction. A ball head plunger is threadedly connected to the outer shaft sleeve. The ball head portion on the ball head plunger is embedded in one of the limiting grooves.

3. The composite bushing according to claim 2, characterized in that, The limiting grooves are spherical.

4. The composite bushing according to claim 3, characterized in that, The ball head plunger is buried in the outer shaft sleeve.

5. The composite bushing according to any one of claims 1-4, characterized in that, A number of inner turning holes with equal adjacent angular intervals are circumferentially arranged at one end of the inner shaft sleeve. A number of outer turning holes with equal adjacent angular intervals are circumferentially arranged at one end of the outer shaft sleeve. The outer turning holes and the inner turning holes are arranged on different sides.

6. The composite bushing according to claim 5, characterized in that, It further includes a first turning tool and a second turning tool; The first turning tool includes a first turning seat. An inner turning column matching the inner turning hole is provided on the first turning seat. A first turning handle for driving rotation is further provided on the first turning seat. The second turning tool includes a second turning seat. An outer turning column matching the outer turning hole is provided on the second turning seat. A second turning handle for driving rotation is further provided on the second turning seat.

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