CN212928553U

CN212928553U - Quick detachable shaft device with cover rises

Info

Publication number: CN212928553U
Application number: CN202021139243.0U
Authority: CN
Inventors: 赵二勋; 赵佳祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-04-09
Anticipated expiration: 2030-06-19

Abstract

An easily-disassembled wheel shaft device with an expansion sleeve comprises a wheel shaft, an expansion sleeve and a lock nut; the assembly position of the wheel shaft is in a circular truncated cone structure, and the assembly position is outward a screw sleeving end; the expansion sleeve is sleeved on an assembly position of the wheel shaft, the front end of the expansion sleeve is of a hollow cylindrical structure, the hollow part is of a round platform structure, and a rectangular opening is formed in the side wall of the main body; the rear end of the expansion sleeve is in a round platform structure, and a round hole is formed in the middle of the expansion sleeve; the locking nut is of an outer hexagonal structure, the inner edge of the locking nut is divided into a screw-free section and a screw opening section, the screw-free section is of a circular truncated cone structure, the locking nut is installed on the threading end of the wheel shaft through the screw opening of the screw opening section, and the screw-free section is sleeved on the rear end of the expansion sleeve. The utility model discloses the advantage lies in: the loading and unloading can be carried out without special loading and unloading environment and tools.

Description

Quick detachable shaft device with cover rises

Technical Field

The utility model relates to a quick detachable shaft device with cover rises for the quick assembly disassembly of arbor wheel and bearing belongs to the machine-building field.

Background

Almost all mechanical devices with rotating assemblies cannot be separated from bearings. In order to make the wheel axle and the bearing inner ring combined more tightly, the diameter of the assembly position of the wheel axle is made slightly larger than that of the bearing inner ring, which is one of the most common methods in the mechanical field at present.

The assembly of shaft slightly is greater than the compound mode of bearing inner race, when letting the combination of shaft and bearing inner race inseparabler, has also caused the puzzlement for machine repair or change machine part: it is difficult to remove the bearing from the axle and to mount the bearing to the axle without special removal tools or special disassembly and assembly environments. When the wheel axle is disassembled and assembled with strong force, the wheel axle or the bearing is easy to be damaged.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model aims at providing a technical solution, through the mode that increases the cover that rises between shaft and axle, realize the axle and follow the simple and easy dismouting between the bearing.

The utility model comprises a wheel axle 0, an expansion sleeve 1 and a lock nut 2 (figure 1).

The assembly position 3 of the wheel shaft 0 is in a round table structure (figure 2), the assembly position 3 is outward provided with a threading end 4, and the threading end 4 is provided with a threading opening 5. The wheel axle 0, the assembly position 3 and the threading end 4 are of an integral structure, and the axes of the wheel axle 0, the assembly position 3 and the threading end are overlapped.

The assembling position 3 is a circular truncated cone structure, and the radius of the bottom surface of the circular truncated cone structure is smaller than that of the wheel axle 0 so as to facilitate the assembling or disassembling of the expansion sleeve 1.

The expansion sleeve 1 is sleeved on the assembly position 3 of the wheel shaft 0, the front end 6 of the expansion sleeve 1 is of a hollow cylindrical structure, the hollow part 8 of the expansion sleeve is of a round table structure (shown in figure 3), and the side wall of the expansion sleeve is provided with a rectangular opening 10.

The rear end 7 of the expansion sleeve 1 is in a circular truncated cone structure, a circular hole 9 is formed in the center of the rear end 7, and the radius of the circular hole 9 is smaller than the top radius of the circular truncated cone structure of the hollow part 8 of the expansion sleeve 1. The axis of the circular hole 9 coincides with the axis of the hollow part 8.

The wall thickness of the thinnest part of the expansion sleeve 1 is larger than the difference between the radius of the wheel axle 0 and the radius of the assembling position 3.

The sum of the wall thickness of the thinnest part of the expansion sleeve 1 and the maximum radius of the assembly position 3 is larger than the radius of the matched bearing inner ring. The structure is to sleeve the expansion sleeve 1 on the wheel axle 0, so that the sum of the radius of the assembly position 3 and the wall thickness of the expansion sleeve 1 is larger than the radius of the matched bearing inner ring, and the assembly is tight.

The sum of the wall thickness of the thinnest part of the expansion sleeve 1 and the minimum radius of the assembly position is not more than the radius of the matched bearing inner ring.

The above structure is to fit the expansion sleeve 1 to the fitting position after the bearing is fitted to the expansion sleeve 1.

The lock nut 2 is of an outer hexagonal structure, and the inner edge of the lock nut 2 is divided into a thread-free section 11 and a screw opening section 12 (figure 4).

The threadless section 11 is a circular truncated cone structure, and the top surface radius and the bottom surface radius of the circular truncated cone structure are equal to those of the rear end 7 of the expansion sleeve 1.

The inner diameter of the end section 12 is the same as the inner diameter of the threading end 4 of the axle 0. The screw mouth 13 of the screw mouth end 12 is identical to the screw mouth 5 of the threading end 4 of the wheel axle 0. The lock nut 2 is sleeved on the sleeve screw end 4. The thread opening 13 of the lock nut 2 and the thread opening 5 of the mantle fiber end 4 are mutually meshed together.

Drawings

Fig. 1 is a structural view of the present invention.

Wherein: 0-axle; 1-expanding sleeve; 2-locking nut.

Fig. 2 is a wheel axle structure view.

Wherein: 0-axle; 3-assembly position; 4-the end of the mantle fiber; 5-screw mouth.

Fig. 3 is a structural view of the expansion sleeve.

Wherein: 1-expanding sleeve; 6-front end; 7-rear end; 8-a hollow portion; 9-circular hole; 10-rectangular mouth.

Fig. 4 is a cross-sectional view of the lock nut.

Wherein: 2-locking nut; 11-no filament section; 12-a screw section; 13-the screw mouth.

Detailed Description

The following describes embodiments of the present invention with reference to fig. 1, fig. 2, fig. 3, and fig. 4.

The sum of the wall thickness of the thinnest part of the expansion sleeve 1 and the minimum radius of the assembly position is not more than the radius of the matched bearing inner ring. The above structure is to fit the expansion sleeve 1 to the fitting position after the bearing is fitted to the expansion sleeve 1.

The lock nut 2 is of an outer hexagonal structure, and the inner edge of the lock nut 2 is divided into a thread-free section 11 and a screw opening section 12 (figure 4). The threadless section 11 is a circular truncated cone structure, and the top surface radius and the bottom surface radius of the circular truncated cone structure are equal to those of the rear end 7 of the expansion sleeve 1.

When the utility model is used, the lock nut 2 is firstly screwed off, and the expansion sleeve 1 is taken down. Then the matched bearing is sleeved on the expansion sleeve 1, and the front end 6 of the expansion sleeve 1 is sleeved with the assembling position 4.

Because the bearing inner ring extrudes the expansion sleeve 1, the rectangular opening 10 of the front end 6 is reduced, the front end 6 of the expansion sleeve 1 is contracted, and when the expansion sleeve 1 is pushed to the position where the diameter of the assembling line 4 is larger than the inner diameter of the opening of the front end 6, the resistance begins to increase.

The lock nut 2 is sleeved on the screw end 4 and screwed into the lock nut 2. After the thread-free section of the lock nut 2 is sleeved on the rear end 7 of the expansion sleeve 1, the lock nut 2 is continuously screwed into the lock nut 2 to push the expansion sleeve 1 to move forwards, and the expansion sleeve 1 tightly supports the assembly position 4 and the inner ring of the bearing step by step, so that the purpose of installing the bearing on the wheel shaft with the outer diameter larger than that of the inner ring of the bearing without adopting specific assembly environments or specific assembly tools such as liquid nitrogen for reducing the temperature of the wheel shaft or heating the bearing in a high-temperature environment is realized.

The utility model discloses in, assembly position 3 of shaft 0 is replaced with the combination of the cover 1 that rises, and the diameter is greater than the assembly position of the shaft of the bearing inner circle that matches with it.

Further, in the utility model discloses in, no matter be the assembly of subassembly or dismantle, only need a spanner can. The assembly and disassembly cost is saved, and the assembly and disassembly time is also saved.

Claims

1. The utility model provides a quick detachable shaft device with cover rises which characterized in that: consists of a wheel shaft, an expansion sleeve and a lock nut; the assembly position of the wheel shaft is in a circular truncated cone structure, and the assembly position is outward a screw sleeving end; the expansion sleeve is sleeved on an assembly position of the wheel shaft, the front end of the expansion sleeve is of a hollow cylindrical structure, the hollow part is of a round platform structure, and a rectangular opening is formed in the side wall of the main body; the rear end of the expansion sleeve is in a round platform structure, and a round hole is formed in the middle of the expansion sleeve; the locking nut is of an outer hexagonal structure, the inner edge of the locking nut is divided into a screw-free section and a screw opening section, the screw-free section is of a circular truncated cone structure, the locking nut is installed on the threading end of the wheel shaft through the screw opening of the screw opening section, and the screw-free section is sleeved on the rear end of the expansion sleeve.

2. The easy-to-detach wheel shaft device with the expansion sleeve as claimed in claim 1, wherein: the top surface radius and the bottom surface radius of the circular truncated cone structure of the assembling position of the wheel shaft are equal to the top surface radius and the bottom surface radius of the circular truncated cone structure of the hollow part of the expansion sleeve; the top surface diameter and the bottom surface radius of the round platform structure at the rear end of the expansion sleeve are equal to the top surface radius and the bottom surface radius of the round platform structure without the screw section at the inner edge of the lock nut.