CN211778383U

CN211778383U - Connecting mechanism for two shafts

Info

Publication number: CN211778383U
Application number: CN202020210861.3U
Authority: CN
Inventors: 刘胜
Original assignee: Suzhou Erma Mechnical & Electrical Co ltd
Current assignee: Suzhou Erma Mechnical & Electrical Co ltd
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2020-10-27
Anticipated expiration: 2030-02-26

Abstract

The utility model discloses a connecting mechanism of two shafts, which comprises a first shaft and a second shaft; the first shaft is provided with a first hole penetrating through the first shaft in the radial direction; forming first step surfaces recessed in the first shaft revolution surface at the orifices at the two ends of the first hole; the second shaft is provided with a second hole penetrating through the second shaft in the radial direction; forming second step surfaces recessed in the second shaft revolution surface at both end ports of the second hole; the first hole and the second hole are coaxially corresponding and are assembled on the same step bolt; the first hole is matched with a stud part on the step bolt; the second hole is matched with a step part on the step bolt; and the step part on the step bolt passes through the second hole and is abutted to the first step surface; the step part is abutted against the first step surface, and a structural gap is formed between the bolt head and the second step surface. After the nut is locked, the second shaft is pressed to the first shaft, and the nut is firm and reliable. Meanwhile, the plane of the nut is in contact with the second shaft, so that the contact area of the nut is increased, and the problem of loosening caused by insufficient contact area is reduced.

Description

Connecting mechanism for two shafts

Technical Field

The utility model relates to a mechanical connection structure field, especially the coupling mechanism of two axles.

Background

Some shaft parts need to be disconnected and divided into two parts due to various factors, and then the two shafts are connected together when the shaft parts need to be used. The connecting mode is various, and the connecting mode comprises a double-flange combined fastener, a sleeve combined fastener and direct welding. However, these methods require various combinations and connections, which increases the structural burden and increases the cost. Moreover, the connection mode is too complex, so that the connection strength of the structure is affected, and the difficulty of disassembly and assembly is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the connecting mechanism of the two shafts is provided, and the problem that reliable connecting strength is achieved by using the least fasteners when the two shafts are connected is solved.

The technical scheme of the utility model is that: a connecting mechanism of two shafts comprises a first shaft and a second shaft which are coaxially sleeved. The first shaft is arranged in the shaft hole of the second shaft, and the connection between the first shaft and the second shaft is fixed by a radial step bolt.

Specifically, a first hole penetrating through the first shaft in the radial direction is formed in the first shaft, and first step surfaces sunken in the first shaft revolution surface are formed at orifices at two ends of the first hole; the second shaft is provided with a second hole penetrating through the second shaft in the radial direction; second step faces recessed in the second shaft revolution surface are formed at both end ports of the second hole.

The first hole and the second hole are coaxially corresponding and assembled on the same step bolt, and the first hole is matched with the stud part on the step bolt. The aperture of the second hole is larger than that of the first hole, so that the stud part of the stepped bolt can be smoothly matched in the first hole.

The second hole is matched with the step part on the step bolt, so the aperture of the second hole is smaller than the size of the first step surface; the step portion on the step bolt can only pass the second hole and contradict to on the first step face like this.

The nut is assembled on the step bolt and acts on the second step surface, and the size of the second step surface is larger than the outer diameters of the bolt head and the nut, so that the bolt head or the nut can be conveniently clamped by a tool.

In order to ensure that the step portion and the nut can perform a fastening function, the step portion needs to abut against the first step surface and a structural gap is formed between the bolt head and the second step surface. If there is no gap, it is not possible to confirm whether the step portion is pressed against the first step surface or whether the bolt head is pressed against the second step surface, which may cause erroneous determination.

The utility model has the advantages that:

1. only one step bolt and one nut are used, the number of fasteners is small, the structural cost is low, and the dismounting and the mounting are convenient.

2. The plane of step bolt and the plane contact of primary shaft, after the nut locking, force the inner wall direction of primary shaft toward the secondary shaft and die, it is firm reliable. Simultaneously, the nut is in plane contact with the second shaft and is not an outer circular surface, so that the contact area of the nut is greatly increased, and the problem of loosening caused by insufficient contact area is greatly reduced.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a partial cross-sectional view of a first shaft;

FIG. 2 is a partial cross-sectional view of the second shaft;

FIG. 3 is an assembly view of a connecting mechanism for two shafts;

wherein: 1. a first shaft; 2. a second shaft; 3. a step bolt; 4. a nut; 11. a first hole; 12. a first step surface; 21. a second hole; 22. a second step surface.

Detailed Description

The utility model discloses a preferred embodiment 1:

the utility model provides a coupling mechanism of two axles, includes coaxial telescope installation's primary shaft 1 and secondary shaft 2, wherein the primary shaft 1 is solid axle, and secondary shaft 2 is the hollow shaft, and the primary shaft 1 is installed in the shaft hole of secondary shaft 2. The connection of the first shaft 1 and the second shaft 2 is fixed by a radial stepped bolt 3.

Specifically, a first hole 11 penetrating through the first shaft 1 in the radial direction is formed in the first shaft 1, and first step surfaces 12 recessed in the rotation surface of the first shaft 1 are formed at orifices at two ends of the first hole 11; the second shaft 2 is provided with a second hole 21 penetrating through the second shaft in the radial direction; second step faces 22 recessed in the surface of revolution of the second shaft 2 are formed at both end openings of the second hole 21.

The first hole 11 and the second hole 21 coaxially correspond to each other and are assembled on the same step bolt 3, and the first hole 11 is matched with a stud part on the step bolt 3. The diameter of the second hole 21 is larger than that of the first hole 11, so that the stud portion of the stepped bolt 3 can be smoothly fitted into the first hole 11.

The second hole 21 is matched with the step part on the step bolt 3, so the aperture of the second hole 21 is smaller than the size of the first step surface 12; so that the stepped portion of the stepped bolt 3 can pass through the second hole 21 and abut against the first stepped surface 12.

The nut 4 is assembled on the stepped bolt 3, the nut 4 acts on the second stepped surface 22, and the second stepped surface 22 is larger than the outer diameters of the bolt head and the nut so as to be convenient to operate.

The utility model discloses a preferred embodiment 2:

a connecting mechanism of two shafts is specifically shown in figure 1, a hole is formed in the radial direction of a first shaft 1, and two planes are machined at two ends of the hole. As shown in fig. 2, a shaft hole is formed in the axial direction of the second shaft 2 to form a tubular shape. A hole is also formed in the radial direction of the second shaft 2, and the hole is slightly larger than the hole in the first shaft 1, and simultaneously, planes are respectively machined at both ends of the two holes.

The first shaft 1 is inserted into the second shaft 2, the step bolt penetrates through the outer side of the upper hole of the second shaft 2, the step part of the step bolt is pressed onto the plane of the first shaft 1, and the first shaft 1 is tightly locked by the nut after penetrating out.

In fig. 3, the hexagonal head flat surface of the stepped bolt and the flat surface of the second shaft 2 are slightly spaced after the locking, so that the step of the stepped bolt is visually confirmed to be pressed against the flat surface of the first shaft 1. If there is no gap, it is not possible to confirm whether the step of the bolt is pressed against the plane of the first shaft 1 or the hexagonal plane of the stepped bolt is pressed against the plane of the second shaft 2, which may cause erroneous judgment.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical concepts of the present invention be covered by the claims of the present invention.

Claims

1. The connecting mechanism of the two shafts comprises a first shaft which is coaxially sleeved in a shaft hole of a second shaft in a stacking manner; the method is characterized in that: the first shaft is provided with a first hole penetrating through the first shaft in the radial direction; forming first step surfaces sunken in the first shaft revolution surface at the orifices at two ends of the first hole; the second shaft is provided with a second hole penetrating through the second shaft in the radial direction; forming second step faces recessed in a second shaft revolution surface at both end ports of the second hole; the first hole and the second hole are coaxially corresponding and are assembled on the same step bolt; the first hole is matched with a stud part on the step bolt; the second hole is matched with a step part on the step bolt; step parts on the step bolts penetrate through the second holes and abut against the first step surfaces; the step part is abutted against the first step surface, and a structural gap is formed between the bolt head and the second step surface.

2. The mechanism for connecting two shafts according to claim 1, wherein: the aperture of the second hole is larger than that of the first hole and smaller than the size of the first step surface.

3. The mechanism for connecting two shafts according to claim 1, wherein: and a nut is assembled on the step bolt and acts on the second step surface.

4. The mechanism for connecting two shafts according to claim 1, wherein: the size of the second step surface is larger than the outer diameters of the bolt head and the nut.