CN212225797U

CN212225797U - Steel bushing

Info

Publication number: CN212225797U
Application number: CN202020805333.2U
Authority: CN
Inventors: 马永真; 蒋秀凡; 俞登勇; 赵鸿飞
Original assignee: Hefei Dingju Precision Manufacturing Co ltd
Current assignee: Hefei Dingju Precision Manufacturing Co ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-12-25
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a steel bushing in bearing steel bushing field, including annular steel bushing body, it has a plurality of oil pits to distribute on the steel bushing inner wall, two at least oil grooves have been seted up to circumference symmetry on the steel bushing body inside wall, set up the oil filler point in the oil groove, just the trend of oil groove is arranged along the axial of steel bushing body. The utility model discloses a steel bushing bearing capacity is strong, can spread the whole surfaces of steel bushing inner wall with lubricating oil fast uniformly, long service life, the practicality is strong.

Description

Steel bushing

Technical Field

The utility model relates to a bearing steel bushing field specifically is a steel bushing.

Background

The bearing steel sleeve plays a role in lubrication through the molybdenum disulfide and other solid antifriction coatings on the inner wall, the metal matrix bears the load from the shaft, and the bearing steel sleeve has the characteristics of high bearing capacity, strong self-lubricating capacity, high temperature resistance and the like, and is particularly suitable for low-speed, heavy-load and reciprocating swing engineering machinery, particularly hydraulic oil cylinders of excavators.

At present, the bearing steel bushing generally all sets up the oil groove, utilizes the oil groove to transmit lubricating oil to the steel bushing inner wall, and then forms the oil film, reduces the coefficient of friction among the slip process to play the radiating effect of cooling. In the prior art, the oil groove is mainly in the form of an 8-shaped oil groove, a spiral oil groove and the like, or a separate oil pit is arranged inside the steel sleeve. The current oil groove structure can not transmit lubricating oil to the inner wall of the steel bushing quickly, so that insufficient lubrication is caused in the use process of the steel bushing, and the phenomena of premature shaft sleeve abrasion, occlusion and the like can not meet the requirements of long-time operation of engineering machinery, complex working conditions and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steel bushing to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a steel bushing, includes annular steel bushing body, it has a plurality of oil pits to distribute on the steel bushing inner wall, at least two oil grooves have been seted up to circumference symmetry on the steel bushing body inside wall, set up the oil filler point in the oil groove, just the trend of oil groove is along the axial arrangement of steel bushing body.

As the improved scheme of the utility model, in order to make the steel bushing transmit lubricating oil to its inner wall all surfaces better, the sum of the surface area in oil groove and oil pit accounts for 25% of steel bushing body inner wall surface area.

As the utility model discloses an improvement scheme, in order to make the steel bushing transmit lubricating oil to its inner wall total surface faster, the oil groove is rectangular form, the oil filler point is established the center department of oil groove.

As an improved scheme of the utility model, in order to balance the number of the oil grooves and the inner diameter of the steel sleeve, when the inner diameter of the steel sleeve body is not more than 100mm, the number of the oil grooves is 4; when the inner diameter of the steel sleeve body is between 100mm and 180mm, the number of the oil grooves is 6.

As an improved scheme of the utility model, the steel bushing body is formed by chemical heat treatment of low-carbon alloy structural steel.

Has the advantages that: the utility model discloses a steel bushing bearing capacity is strong, can spread the whole surfaces of steel bushing inner wall with lubricating oil fast uniformly, long service life, the practicality is strong.

Drawings

FIG. 1 is a radial view and an axial sectional view of the steel jacket according to the present invention;

fig. 2 is a development view of the inner wall of the steel jacket of the present invention.

In the figure: 1-a steel jacket body; 2-oil pit; 3-an oil groove; 4-oil hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Embodiment 1, refer to fig. 1-2, a steel bushing includes an annular steel bushing body 1, a plurality of oil pits 2 are distributed on an inner wall of the steel bushing, at least two oil grooves 3 are symmetrically arranged on an inner side wall of the steel bushing body 1 in a circumferential direction, oil filling holes 4 are formed in the oil grooves 3, and a direction of the oil grooves 3 is arranged along an axial direction of the steel bushing body 1.

In this embodiment, because oil filler point 4 sets up in oil groove 3, and the trend of oil groove 3 is arranged along the axial of steel bushing body 1, consequently lubricating oil pours into oil groove 3 into through oil filler point 4 after, lubricating oil can be full of oil groove 3 rapidly, again because the axle is at steel bushing body 1 inside along axial rotation, lubricating oil constantly arranges the oil pit to oil groove 3 one side under the effect of internal friction force, consequently lubricating oil can scatter and form the oil film in the faying face of axle and steel bushing body 1. Therefore, the lubricating oil of the embodiment has high lubricating speed and uniform lubricating distribution.

Preferably, the sum of the surface areas of the oil groove 3 and the oil pit 2 accounts for 25% of the surface area of the inner wall of the steel jacket body 1.

When the sum of the surface areas of the oil groove 3 and the oil pit 2 is less than 25%, the speed of the lubricating oil dispersed to the inner wall of the steel sleeve body 1 is reduced; when the steel sleeve strength is more than 25%, the strength of the steel sleeve body 1 is affected to be low, and the bearing capacity of the steel sleeve body is affected; when the content is equal to 25%, the strength and the lubricating performance of the steel bushing body 1 are balanced, and a relatively optimal lubricating effect can be realized.

Preferably, the oil sump 3 is elongated, and the oil filling hole 4 is provided at the center of the oil sump 3. When oil groove 3 is rectangular form, the distance of oil filler point 4 apart from 3 axial both ends of oil groove is the straight line, and the straight line is the shortest, can transmit lubricating oil to 3 tip of oil groove fast when steel bushing body 1 rubs with the axle.

Preferably, the larger the inner diameter of the steel jacket body 1, the larger the surface area of the inner wall thereof. When the inner diameter of the steel sleeve body 1 is not more than 100mm, the number of the oil grooves 3 is 4, and 3 oil grooves can also be arranged; when the inner diameter of the steel sleeve body 1 is between 100mm and 180mm, the number of the oil grooves 3 is 6, so that the oil grooves 3 can timely transmit lubricating oil to an oil pit and the inner wall surface of the steel sleeve body 1.

Preferably, the steel jacket body 1 is formed by chemically heat treating low-carbon alloy structural steel such as 20CrMo, 20CrMnTi, and the like.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

In the description of the present invention, it is noted that relational terms such as first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it should be further noted that the terms "upper", "lower", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The utility model provides a steel bushing, includes annular steel bushing body (1), it has a plurality of oil pits (2) to distribute on the steel bushing inner wall, its characterized in that, at least two oil grooves (3) have been seted up to circumference symmetry on steel bushing body (1) inside wall, seted up oil filler point (4) in oil groove (3), just the trend of oil groove (3) is arranged along the axial of steel bushing body (1).

2. A steel jacket according to claim 1, characterised in that the sum of the surface areas of the oil groove (3) and the oil pit (2) represents 25% of the surface area of the inner wall of the steel jacket body (1).

3. A steel jacket according to claim 1 or 2, characterised in that the oil sump (3) is elongate and the oil filling hole (4) is provided at the centre of the oil sump (3).

4. A steel jacket as claimed in claim 3, characterised in that the number of oil grooves (3) is 4 when the inner diameter of the steel jacket body (1) is not more than 100 mm; when the inner diameter of the steel sleeve body (1) is between 100mm and 180mm, the number of the oil grooves (3) is 6.

5. A steel jacket according to claim 1 or 2 or 4, characterised in that the steel jacket body (1) is constructed from a low carbon alloy structural steel by chemical heat treatment.