Shaft sleeve for lubricating powder metallurgy

Abstract

The utility model discloses a shaft sleeve for lubricating powder metallurgy, which comprises a lining shaft sleeve, the outer surface of the upper end of the lining shaft sleeve is fixedly connected with a first outer sleeve, the first outer sleeve is fixed on the upper surface of the lining shaft sleeve through a first screw, and the outer surface of the lower end of the lining shaft sleeve is fixedly connected with a second outer sleeve. The second outer sleeve is fixed to the lower surface of the lining shaft sleeve through a second screw, the inner side surfaces of the upper ends of the first outer sleeve and the lining shaft sleeve are connected with first plug wires through threads, and the inner side surfaces of the lower ends of the second outer sleeve and the lining shaft sleeve are connected with second plug wires through threads; small holes are formed in the inner side surface of the lining shaft sleeve, a storage cavity is formed by adopting an outer wrapping structure, lubricating grease can be injected into the storage cavity, the lubricating grease can be guided out for lubrication through the small holes in the using process, automatic adding can be achieved, and lubrication is sustainable.

Description

Technical Field

[0001] The utility model relates to the field of shaft sleeves for lubricating powder metallurgy, and more specifically to a shaft sleeve for lubricating powder metallurgy. Background Art

[0002] Powder metallurgy is an industrial technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw material, and then forms and sinters it to produce metal materials, composite materials and various types of products. Powder metallurgy technology has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industries, and has become one of the most dynamic branches in new materials science. Powder metallurgy technology has a series of advantages such as significant energy saving, material saving, excellent performance, high product precision and good stability. Due to the advantages of powder metallurgy technology, it plays a pivotal role in the development of new materials.

[0003] The preparation of bushings by powder metallurgy technology has a good development prospect. However, the load-bearing capacity of powder metallurgy sintered bushings currently prepared by powder metallurgy technology is not only related to its own strength but also to the extreme pressure performance of the lubricating medium. Ordinary powder metallurgy sintered bushings are in a mixed lubrication state. When the load reaches a certain level, the oil film damage friction factor increases sharply, and the bushing is quickly damaged in this case.

[0004] In the prior art, such as the utility model with authorization announcement number CN219809285U, a powder metallurgy sintered sleeve embedded with solid lubricant is disclosed, including a powder metallurgy sintered inner sleeve and a powder metallurgy sintered outer sleeve nested on the outside of the powder metallurgy sintered inner sleeve, the powder metallurgy sintered inner sleeve and the powder metallurgy sintered outer sleeve are interference fit; the powder metallurgy sintered inner sleeve and the powder metallurgy sintered outer sleeve are made of the same material, which avoids the situation where the inner sleeve is damaged or the inner sleeve is loosened due to different expansion rates caused by temperature increase; the powder metallurgy sintered inner sleeve has a plurality of through holes along its thickness direction, the through holes are tapered holes with small outside and large inside, and solid lubricants are embedded in the through holes. The solid lubricants are squeezed due to thermal expansion during operation, and the tapered hole design with small outside and large inside allows the solid lubricants to be squeezed inward, so that the solid lubricants are continuously supplied, the self-lubricating properties of the materials are enhanced, and it is not easy to be damaged due to bite when bearing, thereby improving the bearing capacity of the sleeve;

[0005] In the above patent, a disposable solid lubricant is used. After lubrication, the solid material is worn out and no longer in contact with the contact surface. At this time, there is no lubricity and it is unsustainable. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a bushing for lubricating powder metallurgy. By adopting an outsourcing structure, a storage cavity is formed, into which lubricating grease can be pumped. When in use, the lubrication can be guided out through small holes, and the lubrication can be added by oneself, so that the lubrication is sustainable.

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A sleeve for lubricating powder metallurgy comprises an inner liner sleeve, wherein the upper outer surface of the inner liner sleeve is fixedly connected to a first outer sleeve, the first outer sleeve is fixed to the upper surface of the inner liner sleeve by a first screw, the lower outer surface of the inner liner sleeve is fixedly connected to a second outer sleeve, the second outer sleeve is fixed to the lower surface of the inner liner sleeve by a second screw, the first outer sleeve and the upper inner surface of the inner liner sleeve are threadedly connected to a first blocking thread, the second outer sleeve and the lower inner surface of the inner liner sleeve are threadedly connected to a second blocking thread, the inner surface of the inner liner sleeve is provided with small holes, and an outer packaging structure is adopted to form a storage cavity, into which lubricating grease can be pumped, and lubrication can be guided out through the small holes during use, and lubrication can be added by oneself, so that lubrication is continuous.

[0009] Furthermore, the small holes are evenly distributed on the inner surface of the liner sleeve, and the inner end surfaces of the small holes are provided with chamfered corners.

[0010] Furthermore, the outer end surfaces of the first wire blocking and the second wire blocking are provided with flat grooves.

[0011] Furthermore, an outer ring protrusion is provided on the outer surface of the middle end of the inner liner sleeve, and the outer ring protrusion is supported on the inner surfaces of the first outer sleeve and the second outer sleeve.

[0012] Furthermore, the surface of the first outer sleeve is fixed by four first screws.

[0013] Furthermore, the surface of the second outer sleeve is fixed by four second screws.

[0014] Furthermore, a protrusion is arranged at the lower end of the first outer sleeve, and an annular groove is arranged on the surface of the second outer sleeve, and the protrusion and the annular groove are engaged with each other.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) By adopting an outsourcing structure, a storage cavity is formed, into which lubricating grease can be pumped. When in use, lubrication can be guided out through small holes, and lubrication can be added by oneself, so lubrication is continuous. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0019] Figure 3 This is a view of the inner liner sleeve of the utility model;

[0020] Figure 4 It is an enlarged view of point A of the present utility model.

[0021] Description of the numbers in the figure:

[0022] 1 inner sleeve, 2 first outer sleeve, 100 first screw, 101 second screw, 3 second outer sleeve, 4 first blocking thread, 5 second blocking thread, 6 small hole, 60 chamfered corner, 7 outer ring protrusion. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] See also Figure 1-4 , a sleeve for lubricating powder metallurgy, comprising an inner sleeve 1, the outer surface of the upper end of the inner sleeve 1 is fixedly connected with a first outer sleeve 2, the first outer sleeve 2 is fixed to the upper surface of the inner sleeve 1 by a first screw 100, the outer surface of the lower end of the inner sleeve 1 is fixedly connected with a second outer sleeve 3, the second outer sleeve 3 is fixed to the lower surface of the inner sleeve 1 by a second screw 101, the first outer sleeve 2 and the inner surface of the upper end of the inner sleeve 1 are connected by a first plugging thread 4 by a thread, the second outer sleeve 3 and the inner surface of the lower end of the inner sleeve 1 are connected by a second plugging thread 5 by a thread, and the inner surface of the inner sleeve 1 is provided with a small hole 6; by adopting an outer packaging structure, a storage cavity is formed, lubricating grease can be injected, and lubrication can be guided out through the small hole when in use, and lubrication can be added by oneself, and lubrication is sustainable;

[0026] The small holes 6 are evenly distributed on the inner surface of the liner sleeve 1, and the inner end surface of the small holes 6 is provided with a rounded corner 60. When the liner is supported, it rubs against the support surface, and the rounded corner 60 is not easy to wear;

[0027] The outer end surfaces of the first blocking wire 4 and the second blocking wire 5 are provided with flat grooves, which are convenient for a flat screwdriver to twist and install the blocking wires;

[0028] An outer ring protrusion 7 is provided on the outer surface of the middle end of the liner sleeve 1, and the outer ring protrusion 7 is supported on the inner surface of the first outer sleeve 2 and the second outer sleeve 3, so as to support the two sets of outer sleeves;

[0029] The surface of the first outer sleeve 2 is fixed by four first screws 100, and the surface of the second outer sleeve 3 is fixed by four second screws 101, so the installation is stable;

[0030] A convex opening is arranged at the lower end of the first outer sleeve 2, and an annular groove is arranged on the surface of the second outer sleeve 3, and the convex opening and the annular groove are engaged with each other, and the concave-convex closing can be achieved, thereby improving the sealing performance;

[0031] When in use, a first outer sleeve 2 is fixedly connected to the outer surface of the upper end of the inner sleeve 1, and the first outer sleeve 2 is fixed to the upper surface of the inner sleeve 1 by a first screw 100, and a second outer sleeve 3 is fixedly connected to the outer surface of the lower end of the inner sleeve 1. A cavity structure can be formed between the outer sleeve and the inner sleeve 1, and the first outer sleeve 2 and the inner surface of the upper end of the inner sleeve 1 are connected by a first blocking thread 4 through a thread, and the second outer sleeve 3 and the inner surface of the lower end of the inner sleeve 1 are connected by a second blocking thread 5 through a thread. After the blocking thread is twisted and removed, lubricating grease can be introduced from both ends for lubrication. Small holes 6 are provided on the inner surface of the inner sleeve 1; the small holes 6 are evenly distributed on the inner surface of the inner sleeve 1, and chamfered corners 60 are provided at the inner end surfaces of the small holes 6. When the liner is supported, it rubs against the supporting surface, and the chamfered corners 60 are not easy to wear; and the lubricating grease can be introduced from the small holes 6 to increase the lubrication performance.

[0032] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A bushing for lubricating powder metallurgy, comprising a lined bushing (1), characterized in that: The upper outer surface of the inner sleeve (1) is fixedly connected to a first outer sleeve (2), and the first outer sleeve (2) is fixed to the upper surface of the inner sleeve (1) by a first screw (100). The lower outer surface of the inner sleeve (1) is fixedly connected to a second outer sleeve (3), and the second outer sleeve (3) is fixed to the lower surface of the inner sleeve (1) by a second screw (101). The upper inner surfaces of the first outer sleeve (2) and the inner sleeve (1) are connected by a first blocking thread (4) through threads, and the lower inner surfaces of the second outer sleeve (3) and the inner sleeve (1) are connected by a second blocking thread (5) through threads. The inner surface of the inner sleeve (1) is provided with a small hole (6).

2. A bushing for lubricating powder metallurgy according to claim 1, characterized in that: The small holes (6) are evenly distributed on the inner surface of the liner sleeve (1), and a chamfer (60) is provided at the inner end surface of the small holes (6).

3. The bushing for lubricating powder metallurgy according to claim 1, characterized in that: The outer end surfaces of the first wire blocking (4) and the second wire blocking (5) are provided with flat grooves.

4. The bushing for lubricating powder metallurgy according to claim 1, characterized in that: An outer ring protrusion (7) is provided on the outer surface of the middle end of the liner sleeve (1), and the outer ring protrusion (7) is supported on the inner side surfaces of the first outer sleeve (2) and the second outer sleeve (3).

5. The bushing for lubricating powder metallurgy according to claim 1, characterized in that: The surface of the first outer sleeve (2) is fixed by four first screws (100).

6. The bushing for lubricating powder metallurgy according to claim 1, characterized in that: The surface of the second outer sleeve (3) is fixed by four second screws (101).

7. The bushing for lubricating powder metallurgy according to claim 1, characterized in that: A protrusion is arranged at the lower end of the first outer sleeve (2), and an annular groove is arranged on the surface of the second outer sleeve (3), and the protrusion and the annular groove are engaged with each other.

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