CN214888307U

CN214888307U - Combined shaft structure

Info

Publication number: CN214888307U
Application number: CN202121067240.5U
Authority: CN
Inventors: 黄超; 陶永芹; 董建华; 陈军; 刘洋
Original assignee: Triumph Heavy Industry Co Ltd
Current assignee: Triumph Heavy Industry Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-11-26
Anticipated expiration: 2031-05-18

Abstract

The utility model relates to the technical field of combined shafts, in particular to a combined shaft structure, which comprises a main shaft, a nut and a cylindrical shaft, wherein the end part of the main shaft is provided with an opening and a connecting groove, the nut is in interference fit with the connecting groove, and the cylindrical shaft penetrates out of an inner hole of the nut; the outer wall of the nut and the wall of the connecting groove are both provided with half thread structures, the half thread structures of the nut and the connecting groove are aligned with each other to form a complete screw hole, and a positioning screw is arranged in the screw hole through the thread structures; two groups of positioning screws are arranged and are symmetrically arranged; the combined shaft structure provided by the utility model has reasonable structural design, easy installation and use, simple processing technique and operation, is suitable for the batch production of parts, saves the processing time, improves the production efficiency, and has higher processing precision of the shaft and the screw thread; can select whether to add the cylinder axle as required, increase the application scene of combination axle, the application scope is wider.

Description

Combined shaft structure

Technical Field

The utility model relates to a combination axle technical field specifically is a combination axle construction.

Background

The shaft is one of important mechanical parts, and is ubiquitous and plays an important role in various mechanical devices. The shaft is not single, and usually needs to be installed together with many parts (such as gears, pulleys, etc.) to form a shaft system, and the shaft system performs circular motion around the shaft center under the support of a bearing to transmit torque.

The shaft is divided into an optical shaft, a stepped shaft, a solid shaft and a hollow shaft according to the structural shape of the shaft. Most shafts are integrated, but a part of the shafts need a part of hollow structures because of work, and the hollow parts consist of two sections of holes with different inner diameters, so that the inner holes are small and deep, and the outer holes are large, thereby forming a step. The existing combined shaft is inconvenient to be installed and connected with other parts, so that the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a combination axle construction 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: a combined shaft structure comprises a main shaft, a nut and a cylindrical shaft, wherein the end part of the main shaft is provided with an opening and is provided with a connecting groove, the nut is in interference fit with the connecting groove, and the cylindrical shaft penetrates out of an inner hole of the nut; the outer wall of the nut and the wall of the connecting groove are both provided with half thread structures, the half thread structures of the nut and the connecting groove are aligned with each other to form a complete screw hole, and a positioning screw is arranged in the screw hole through the thread structures; an inner groove is formed in the main shaft, the inner groove is located on the inner side of the connecting groove, the diameter of the inner groove is smaller than that of the connecting groove, and a stepped structure is arranged at the connecting position of the connecting groove and the inner groove.

Preferably, the outer wall of the nut is circular, the connecting groove and the inner groove are circular grooves, and the central axes of the main shaft, the nut, the cylindrical shaft, the connecting groove and the inner groove are overlapped.

Preferably, the ratio of the diameters of the connecting groove and the inner groove is 1: 0.75 to 0.85, and the ratio of the depth of the connecting groove to the depth of the inner groove is 1:1.5 to 2.5.

Preferably, the arrangement of the positioning screws is not less than two groups, the positioning screws are evenly arranged around the connecting surface of the nut and the connecting groove, and the positioning screws are flat head screws.

Preferably, a positioning groove is arranged in the stepped structure at the joint of the connecting groove and the inner groove, a positioning pin is arranged on the end surface of the nut, and the positioning pin is correspondingly clamped with the positioning groove; and a plurality of groups of positioning pins are symmetrically arranged on the end face of the nut.

Preferably, a chamfer structure is arranged on the end face of the nut.

Preferably, one end of the cylindrical shaft is provided with an external thread, and the external thread is connected with an internal thread in an inner hole of the nut in a matched mode.

Preferably, the end part of the cylindrical shaft is provided with a limiting plate, the size of the limiting plate is smaller than that of the inner groove, and the limiting plate is clamped on the inner side of the nut.

Compared with the prior art, the beneficial effects of the utility model are that: the combined shaft structure provided by the utility model has reasonable structural design, easy installation and use, simple processing technique and operation, is suitable for the batch production of parts, saves the processing time, improves the production efficiency, and has higher processing precision of the shaft and the screw thread; can select whether to add the cylinder axle as required, increase the application scene of combination axle, the application scope is wider.

Drawings

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

fig. 2 is a schematic cross-sectional structure diagram of the present invention;

reference numbers in the figures: 1. a main shaft; 2. a nut; 3. a cylindrical shaft; 4. a set screw; 5. connecting grooves; 6. a limiting plate; 7. positioning pins; 8. positioning a groove; 9. an inner tank.

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.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, 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," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 according to specific situations by those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: a combined shaft structure comprises a main shaft 1, a nut 2 and a cylindrical shaft 3, wherein an opening is formed in the end part of the main shaft 1, a connecting groove 5 is formed in the end part of the main shaft, the nut 2 is in interference fit with the connecting groove 5, and the cylindrical shaft 3 penetrates out of an inner hole of the nut 2; half thread structures are arranged on the outer wall of the nut 2 and the wall of the connecting groove 5, the half thread structures of the nut 2 and the connecting groove are aligned with each other to form a complete screw hole, and a positioning screw 4 is arranged in the screw hole through the thread structures; an inner groove 9 is formed in the main shaft 1, the inner groove 9 is located on the inner side of the connecting groove 5, the diameter of the inner groove 9 is smaller than that of the connecting groove 5, and a step-shaped structure is arranged at the connecting position of the connecting groove 5 and the inner groove 9.

Furthermore, the outer wall of the nut 2 is circular, the connecting groove 5 and the inner groove 9 are circular grooves, and the central axes of the main shaft 1, the nut 2, the cylindrical shaft 3, the connecting groove 5 and the inner groove 9 are overlapped.

Further, the diameter ratio of the connecting groove 5 to the inner groove 9 is 1: 0.75 to 0.85, and the ratio of the depth of the connecting groove 5 to the depth of the inner groove 9 is 1:1.5 to 2.5.

Furthermore, two sets of set screws 4 are no less than arranged, and are uniformly arranged around the connecting surface of the nut 2 and the connecting groove 5, and the set screws 4 are flat head screws.

Furthermore, a positioning groove 8 is arranged in the stepped structure at the joint of the connecting groove 5 and the inner groove 9, a positioning pin 7 is arranged on the end surface of the nut 2, and the positioning pin 7 is correspondingly clamped with the positioning groove 8; and a plurality of groups of positioning pins 7 are symmetrically arranged on the end surface of the nut 2.

Furthermore, a chamfer structure is arranged on the end face of the nut 2.

Furthermore, 3 one end of cylinder axle is provided with the external screw thread, the internal screw thread cooperation in external screw thread and the 2 holes of nut is connected.

Further, 3 tip of cylindric axle is provided with limiting plate 6, limiting plate 6 size is less than the 9 sizes of inside groove, and limiting plate 6 cards is inboard at nut 2.

The working principle is as follows: the main shaft 1, the nut 2 and the cylindrical shaft 3 are nested with each other, the nut 2 is clamped in the connecting groove 5 and forms a screw hole with the connecting groove 5, and the screw hole is fixed by using a positioning screw 4, so that the connection stability of the main shaft 1, the nut 2 and the connecting groove is ensured; the cylindrical shaft 3 penetrates out of the nut 2 and is installed through a threaded structure, and meanwhile, a limiting plate 6 arranged at the tail end of the cylindrical shaft 3 is clamped on the inner side of the nut 2, so that the cylindrical shaft 3 is prevented from falling off; the cylindrical shaft 3 is selected to be installed or not according to the situation, and the whole combined shaft is directly installed through the thread on the inner side of the nut 2 when the combined shaft is not installed.

The positioning screws 4 are flat-head screws and are flush with the mounting surface, so that the use is prevented from being hindered; the plurality of positioning screws 4 are uniformly arranged, so that the stability of the structure is ensured; the positioning groove 8 in the stepped structure is inserted into the positioning pin 7 to play a positioning role, so that the outer wall of the nut 2 is conveniently aligned with the half-thread structure on the groove wall of the connecting groove 5, and the integral assembly is facilitated; the chamfer structure of 2 terminal surfaces of nut makes things convenient for in 2 cards of nut are gone into the spread groove 5.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A composite shaft structure characterized in that: the nut-type shaft joint comprises a main shaft (1), a nut (2) and a cylindrical shaft (3), wherein the end part of the main shaft (1) is opened and is provided with a connecting groove (5), the nut (2) is in interference fit with the connecting groove (5), and the cylindrical shaft (3) penetrates out of an inner hole of the nut (2); half thread structures are arranged on the outer wall of the nut (2) and the wall of the connecting groove (5), the half thread structures of the nut and the connecting groove are aligned with each other to form a complete screw hole, and a positioning screw (4) is arranged in the screw hole through the thread structures; an inner groove (9) is formed in the main shaft (1), the inner groove (9) is located on the inner side of the connecting groove (5), the diameter of the inner groove (9) is smaller than that of the connecting groove (5), and a step-shaped structure is arranged at the connecting position of the connecting groove (5) and the inner groove (9).

2. The composite shaft structure according to claim 1, wherein: the outer wall of the nut (2) is circular, the connecting grooves (5) and the inner grooves (9) are circular grooves, and the central axes of the main shaft (1), the nut (2), the cylindrical shaft (3), the connecting grooves (5) and the inner grooves (9) are overlapped with each other.

3. The composite shaft structure according to claim 1, wherein: the diameter ratio of the connecting groove (5) to the inner groove (9) is 1: 0.75 to 0.85, and the ratio of the depth of the connecting groove (5) to the depth of the inner groove (9) is 1:1.5 to 2.5.

4. The composite shaft structure according to claim 1, wherein: two sets of are no less than in set screw (4) setting, and evenly set up round the connection face of nut (2) and spread groove (5), set screw (4) adopt the grub screw.

5. The composite shaft structure according to claim 1, wherein: a positioning groove (8) is arranged in the stepped structure at the joint of the connecting groove (5) and the inner groove (9), a positioning pin (7) is arranged on the end surface of the nut (2), and the positioning pin (7) is correspondingly clamped with the positioning groove (8); and a plurality of groups of positioning pins (7) are symmetrically arranged on the end surface of the nut (2).

6. The composite shaft structure according to claim 1, wherein: and a chamfer structure is arranged on the end face of the nut (2).

7. The composite shaft structure according to claim 1, wherein: and an external thread is arranged at one end of the cylindrical shaft (3) and is matched and connected with an internal thread in an inner hole of the nut (2).

8. The composite shaft structure according to claim 1, wherein: the end part of the cylindrical shaft (3) is provided with a limiting plate (6), the size of the limiting plate (6) is smaller than that of the inner groove (9), and the limiting plate (6) is clamped on the inner side of the nut (2).