CN222021037U - Assembly structure of deep hole inner cold-packed shaft sleeve - Google Patents

Abstract

The utility model belongs to the field of mechanical assembly, and specifically relates to an assembly structure of a cold-mounted shaft sleeve in a deep hole, comprising a first tooling shaft and a second tooling shaft which are coaxially arranged, the first tooling shaft comprising a conveying end and a connecting end which are sequentially arranged along its axial direction, a pressing block being arranged on the connecting end, the second tooling shaft comprising a guide section which is sequentially arranged along its axial direction and cooperates with a second long hole guide, and an installation section which is coordinated with the shaft sleeve, the installation section and the connecting end are connected to each other, the shaft sleeve is sleeved on the installation section, the pressing block cooperates with the guide section to press the shaft sleeve on the installation section along the axial direction, and a disassembly part which is located outside the long axis is respectively arranged on the guide section and the conveying end. The assembly structure greatly shortens the time required for assembly, and the assembly position is accurate, and is suitable for shaft sleeve assembly with a deep installation position and a narrow operating space.

Description

Assembly structure of deep hole inner cold-packed shaft sleeve

Technical Field

The utility model belongs to the field of mechanical assembly, and particularly relates to an assembly structure of a deep hole inner cold-packaged shaft sleeve.

Background

In the existing mechanical accessories, one accessory consists of a long shaft and a shaft sleeve arranged in a mounting hole on the long shaft, and the shaft sleeve is required to be incapable of falling off from the mounting hole in the use process of the accessory, so that the shaft sleeve and the mounting hole of the long shaft are in interference fit in the design process. Because the long shaft is slender and the mounting hole is deeper, the installation of the operation mounting space is extremely small, and one-time assembly is required to be successful, otherwise, the accessory is scrapped. The conventional assembly mode of the shaft sleeve and the mounting hole is to align the shaft sleeve with the mounting hole, pad the shaft sleeve with a wooden cushion block, then uniformly strike the wooden cushion block with a hammer, slowly enter the mounting hole after the shaft sleeve is stressed, and therefore time and labor are wasted, and the mounting precision cannot be guaranteed and is only suitable for the mounting hole with shallower depth. It is therefore desirable to design an assembly structure suitable for use with deep mounting holes and bushings.

Disclosure of utility model

The utility model aims to solve the problems in the prior art, and provides an assembly structure of a shaft sleeve in a deep hole, which can rapidly and accurately assemble the shaft sleeve and a deeper inner hole in place.

The utility model adopts the specific technical scheme that:

The utility model provides an assembly structure of cold charge axle sleeve in deep hole for the assembly of axle sleeve and major axis has set gradually first slot hole, mounting hole and second slot hole along its axial in the major axis, and the internal diameter of first slot hole is greater than the internal diameter of second slot hole, and the key is, this assembly structure includes coaxial first frock axle and the second frock axle that sets gradually along its axial, first frock axle include conveying end, the link that sets gradually along its axial, be provided with the compact heap on the link, the second frock axle include along its axial set gradually with second slot hole direction complex guide section, with axle sleeve complex installation segment, installation segment and link interconnect, the axle sleeve cover locate on the installation segment, compact heap and guide section cooperation compress tightly the axle sleeve on the installation segment along the axial, guide section, conveying end on still be provided with the outer dismantlement portion of major axis respectively.

The diameter of the conveying end and the diameter of the compacting block are smaller than the inner diameter of the first long hole.

And a nylon sleeve is coaxially arranged on the mounting section.

The nylon sleeve is provided with a group of arc-shaped bulges.

The arc-shaped bulges are arranged in pairs, and the opening directions of the arc-shaped bulges arranged in pairs are opposite.

The beneficial effects of the utility model are as follows:

According to the utility model, the shaft sleeve is clamped by adopting the first tool shaft and the second tool shaft to be sent to the long shaft for assembly, the shaft sleeve is assembled in place by fixedly connecting the first tool shaft and the second tool shaft, the time required for assembly is greatly shortened by less than 30 seconds, the assembly position is accurate, the technical problem that the shaft sleeve is difficult to assemble to a deeper mounting hole in the prior art is solved, and the shaft sleeve assembly device is suitable for shaft sleeve assembly with a deeper mounting position and a narrow operation space.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic structural view of a first tooling shaft;

FIG. 3 is a schematic structural view of a second tooling shaft;

FIG. 4 is a left side view of the second tooling shaft;

FIG. 5 is an enlarged schematic view of portion A of FIG. 4;

FIG. 6 is a schematic view of the structure of the long axis;

FIG. 7 is a schematic structural view of a bushing;

FIG. 8 is a schematic view of the present utility model in operation;

In the drawing, 1, a shaft sleeve, 2, a long shaft, 3, a first long hole, 4, a mounting hole, 5, a second long hole, 6, a first tool shaft, 7, a second tool shaft, 8, a guide section, 9, a mounting section, 10, a conveying end, 11, a connecting end, 12, a compression block, 13, a dismounting part, 14, a nylon sleeve, 15 and an arc-shaped bulge.

Detailed Description

The utility model is further described with reference to the accompanying drawings and specific examples:

In the specific embodiment, as shown in fig. 1 to 6, a first long hole 3, a mounting hole 4 and a second long hole 5 are sequentially arranged in the long shaft 2 along the axial direction thereof, the inner diameter of the first long hole 3 is larger than the inner diameter of the mounting hole 4, and the inner diameter of the mounting hole 4 is larger than the inner diameter of the second long hole 5. The outer diameter value of the shaft sleeve 1 is phi 42.08mm, the inner diameter of the mounting hole 4 on the long shaft 2 is phi 42.02mm, the interference is 0.06mm, and the distance between the mounting hole 4 and the left end face of the long shaft 1 is 300mm. In this embodiment, the long shaft 2 made of iron and the shaft sleeve 1 made of copper are selected.

The utility model provides an assembly structure of cold charge axle sleeve in deep hole, including coaxial first frock axle 6 and the second frock axle 7 that set up, first frock axle 6 includes along its axial transport end 10, link 11 that set gradually, be provided with compact heap 12 on the link 11, second frock axle 7 include along its axial setting gradually with second slot hole 5 direction complex guide section 8, with axle sleeve 1 complex installation section 9, installation section 9 and link 11 interconnect, compact heap 12 and guide section 8's diameter all is greater than axle sleeve 1's internal diameter and is less than axle sleeve 1's external diameter. The end of the installation section 9 is provided with an internal threaded hole, the end of the connecting end 11 is provided with a screw rod, and the installation section 9 and the connecting end 11 are fixedly connected with the aid of the screw rod and the internal threaded hole. The compression block 12 is a spacer.

When the shaft sleeve 1 is assembled with the long shaft 2, a cooling tank special for liquid nitrogen and a stainless steel lifting barrel are prepared, the volume of the cooling tank is 20L, a round hole is formed in the bottom of the stainless steel lifting barrel, and when the liquid nitrogen liquid level of the stainless steel lifting barrel is lifted out, liquid nitrogen in the stainless steel lifting barrel leaks, so that the shaft sleeve 1 is conveniently taken out of the stainless steel lifting barrel.

The long shaft 2 is placed on a bracket and is regulated to be stable; placing a cooling tank filled with liquid nitrogen in a safe area, loading the shaft sleeve 1 into a stainless steel bucket, and then placing the stainless steel bucket into the cooling tank for cooling, wherein the outer diameter of the shaft sleeve 1 is reduced to 42.01mm, so that the assembly condition is met;

The staff wears the heat insulation glove, avoids liquid nitrogen to splash to the hand and frostbite, slowly proposes the stainless steel bucket from the cooling tank, and when the stainless steel bucket is about to leave the liquid nitrogen liquid level, slowly proposes to prevent liquid nitrogen from leaking from the bottom of the stainless steel bucket and dripping on the liquid nitrogen liquid level to produce splashing. Taking the shaft sleeve 1 out of the stainless steel lifting barrel and rapidly sleeving the shaft sleeve 1 on the mounting section 9 of the second tool shaft 7, filling a compression block 12 on the shaft sleeve 1, then fixedly connecting the first tool shaft 6 with the second tool shaft 7 by screwing a screw on the connecting end 11 with an internally threaded hole on the mounting section 9, axially compressing the shaft sleeve 1 by matching the compression block 12 with the guide section 8, and respectively arranging a dismounting part 13 positioned outside the long shaft 2 on the guide section 8 and the conveying end 10; the dismounting portion 13 in this embodiment is a square shaft that cooperates with a wrench.

The connected first tooling shaft 6 and second tooling shaft 7 enter along the first long hole 3, the guide section 8 enters the second long hole 5 and then guides the second long hole 5, the shaft sleeve 1 and the mounting hole 4 are ensured to be coaxial, and the first tooling shaft 6 and the second tooling shaft 7 are continuously pushed in order to ensure that the shaft sleeve 1 is assembled in place; in order to check whether the assembly is in place, the distance from the left end of the conveying end 10 on the connected first tooling shaft 6 and the second tooling shaft 7 to the right end of the guide section 8 is the length of the long shaft 2, and when the assembly is in place, the left end of the conveying end 10 is flush with the left end of the long shaft 2, and the right end of the guide section 8 is flush with the right end of the long shaft 2; the staff can directly check the installation position of the shaft sleeve 1 by means of the ruler;

After the shaft sleeve 1 is assembled in place, heat is absorbed by the long shaft 2, and the heat conductivity coefficient of copper is 5 times that of iron, so that the shaft sleeve 1 can absorb heat quickly in the long shaft 2 to reach a heat balance state, and the outer diameter of the mounting hole 4 tightly holds the shaft sleeve 1 to meet the technical requirement of interference fit; the inner diameter of the sleeve 1 returns to the cooled dimension creating a gap with the mounting section 9.

Finally, the first tool shaft 6 and the second tool shaft 7 are separated by means of the wrench clamping and disassembling part 13, the first tool shaft 6 and the second tool shaft 7 are taken out of the long shaft 2 respectively, and the shaft sleeve 1 and the long shaft 2 are assembled.

By utilizing the assembly structure of the embodiment, the first tool shaft 6 and the second tool shaft 7 are fixedly connected to assemble the shaft sleeve 1 in place, only 20 seconds are needed, the assembly time is greatly shortened, the assembly position is accurate, the technical problem that the shaft sleeve 1 is difficult to assemble to the deeper mounting hole 4 in the prior art is solved, and the assembly structure is suitable for shaft sleeve assembly with the deeper mounting position and narrow operation space.

The diameter of the conveying end 10 and the diameter of the compaction block 12 are smaller than the inner diameter of the first long hole 3, so that the first tool shaft 6 can conveniently enter and exit from the first long hole 3, and the shaft sleeve 1 and the mounting hole 4 can be coaxially arranged only by guiding the guide section 8 and the second long hole 5.

The nylon sleeve 14 is further coaxially arranged on the mounting section 9, the shaft sleeve 1 is sleeved on the nylon sleeve 14 in advance after being cooled, heat exchange between the shaft sleeve 1 and the mounting section 9 is effectively isolated, and the shaft sleeve 1 is prevented from absorbing excessive heat when not assembled in place, so that the outer diameter is enlarged, and the assembly is smoothly completed.

The nylon sleeve 14 is provided with a group of arc-shaped bulges 15, and when the shaft sleeve 1 is sleeved on the nylon sleeve 14, the arc-shaped bulges 15 are extruded, so that the stability of the shaft sleeve 1 on the mounting section 9 is enhanced.

The arc-shaped bulges 15 are arranged in pairs, the opening directions of the arc-shaped bulges 15 arranged in pairs are opposite, and when the arc-shaped bulges 15 are extruded by the shaft sleeve 1, the arc-shaped bulges 15 in pairs are mutually close to and propped against each other, so that the nylon sleeve 14 and the shaft sleeve 1 are more stable, and the shaft sleeve 1 is effectively prevented from moving in the assembly process; when the shaft sleeve 1 reaches the heat balance, the pressure of the shaft sleeve 1 to the arc-shaped bulge 15 is reduced, and the second tool shaft 7 with the nylon sleeve 14 can be taken down.

The utility model has the advantages of simple structure, convenient operation and precise assembly, reduces the scrapping probability of the long shaft and the shaft sleeve, and remarkably improves the assembly speed.

Claims (5)

1. An assembly structure of cold charge axle sleeve in deep hole for the assembly of axle sleeve (1) and major axis (2), has set gradually first slot hole (3), mounting hole (4) and second slot hole (5) along its axial in major axis (2), and the internal diameter of first slot hole (3) is greater than the internal diameter of second slot hole (5), its characterized in that: this assembly structure includes first frock axle (6) and second frock axle (7) of coaxial setting, first frock axle (6) include along its axial transport end (10), link (11) that set gradually, be provided with compact heap (12) on link (11), second frock axle (7) including along its axial setting in proper order with second slot hole (5) direction complex guide section (8), with axle sleeve (1) complex installation segment (9), installation segment (9) and link (11) interconnect, axle sleeve (1) cover locate on installation segment (9), compact heap (12) and guide segment (8) cooperate along axial compress tightly axle sleeve (1) on installation segment (9), guide segment (8), transport end (10) on still be provided with respectively and be located the outer dismantlement portion (13) of major axis (2).

2. The assembly structure of the deep hole inner cold-packed shaft sleeve according to claim 1, wherein: the diameter of the conveying end (10) and the diameter of the compacting block (12) are smaller than the inner diameter of the first long hole (3).

3. The assembly structure of the deep hole inner cold-packed shaft sleeve according to claim 1, wherein: and a nylon sleeve (14) is coaxially arranged on the mounting section (9).

4. A deep hole in-mold cold-set bushing assembly structure as defined in claim 3, wherein: the nylon sleeve (14) is provided with a group of arc-shaped bulges (15).

5. The assembly structure of the deep hole inner cold-packed shaft sleeve according to claim 4, wherein: the arc-shaped bulges (15) are arranged in pairs, and the opening directions of the arc-shaped bulges (15) arranged in pairs are opposite.