CN221838771U - Belt wheel and expansion sleeve - Google Patents

Abstract

The application relates to the technical field of expansion sleeves, in particular to a belt pulley and an expansion sleeve; the application provides a belt pulley and an expansion sleeve, which comprises a sleeve body sleeved between a shaft rod and the belt pulley, wherein one end of the sleeve body is provided with an end plate, the end plate and the belt pulley are fixedly connected through bolts, the sleeve body is of an open type expandable structure, and the outer surface of the sleeve body is of a conical cylinder surface; because the opening type expandable structure and the conical cylinder surface are designed in the expansion sleeve, the expansion sleeve can be conveniently assembled and disassembled with the shaft rod through the opening type expandable structure, and can be conveniently assembled and disassembled with the belt wheel through the conical cylinder surface, and the problem that the belt wheel or the shaft rod is easy to permanently deform and damage due to overlarge external force in the assembling and disassembling process because the belt wheel is in interference fit with the shaft rod in the prior art is solved.

Description

A pulley and a tensioning sleeve

Technical Field

The present application relates to the technical field of expansion sleeves, and in particular to a pulley and an expansion sleeve.

Background Art

In the prior art, in order to avoid shaking during use and thus affect power transmission, the pulley and the shaft rod are usually connected in an interference fit manner with a small hole and a thick shaft. However, the interference fit connection structure makes it difficult to assemble or disassemble the pulley, and often causes permanent deformation and damage to the pulley or the shaft rod. Therefore, it is very important to ensure the stability of the pulley connection and facilitate its assembly and disassembly operations.

Utility Model Content

The problem to be solved by the present application is that the existing pulley has an interference fit with the shaft, which may easily cause permanent deformation and damage of the pulley or the shaft due to excessive external force during loading and unloading.

In order to solve the above technical problems, the present application provides a pulley and a tensioning sleeve, including a sleeve body sleeved between a shaft and a pulley, an end plate being arranged at one end of the sleeve body, the end plate and the pulley being connected and fixed by bolts, the sleeve body being an open expandable structure, and the outer surface of the sleeve body being a conical cylindrical surface.

Since the expansion sleeve of the present application is designed with an open expandable structure and a conical cylinder surface, it can facilitate loading and unloading operations with the shaft rod through the open expandable structure, and can also facilitate loading and unloading operations with the pulley through the conical cylinder surface, thereby solving the problem of the pulley in the prior art that the pulley and the shaft rod have an interference fit, which may cause permanent deformation and damage to the pulley or the shaft rod due to excessive external force during loading and unloading.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the three-dimensional structure of a locking sleeve.

FIG. 2 is a schematic diagram of the structure of the expansion sleeve when viewed from above.

FIG. 3 is a schematic diagram of the front view of the expansion sleeve.

FIG. 4 is a schematic diagram of the cross-sectional structure of the pulley.

FIG. 5 is a schematic diagram of the front view of the pulley.

FIG. 6 is a schematic diagram of the structure of the expansion sleeve and the pulley before assembly.

FIG. 7 is a schematic diagram of the structure of the expansion sleeve and the pulley after assembly.

In the figure: 1. sleeve; 2. end plate; 3. through hole; 4. threaded hole; 5. pulley body.

DETAILED DESCRIPTION

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

Example

The present application relates to a locking sleeve, as shown in FIG1 , the locking sleeve comprises a sleeve body 1 sleeved between a shaft and a pulley, in order to facilitate the sleeve assembly and disassembly operation between the sleeve body 1 and the shaft, the inner surface of the sleeve body 1 is a straight cylinder surface, and the outer surface of the sleeve body 1 is a conical cylinder surface, and in order to improve the connection stability between the sleeve body 1 and the pulley, an end plate 2 is arranged at one end of the sleeve body 1, and the end plate 2 is connected and fixed to the pulley by bolts, and in order to improve the connection stability between the sleeve body 1 and the shaft Therefore, the sleeve 1 is an open expandable structure. As the sleeve 1 is sleeved inside the pulley and gradually tightened by the bolts, the inner diameter of the sleeve 1 will gradually deform and shrink, thereby forming a stable clamping operation for the shaft rod. A connecting key is also arranged between the shaft rod and the sleeve 1. In order to facilitate the disassembly operation of the expansion sleeve, a through hole 3 for disassembly operation is also arranged on the upper part of the end plate 2. The taper of the sleeve 1 is 1:9.375, and the upper parts of the pulley and the end plate 2 are provided with threaded holes 4 for passing bolts.

A pulley, as shown in Figure 1, includes a detachably connected pulley body 5 and a tightening sleeve. In order to facilitate the installation and unloading operations between the sleeve 1 and the pulley body 5, the inner surface of the pulley body 5 is a conical cylindrical surface that matches the outer surface of the sleeve 1.

When in use, first install the expansion sleeve to the upper part of the shaft rod, and then sleeve the pulley body 5 on the upper part of the sleeve 1 of the expansion sleeve, and then connect the end plate 2 to the pulley by bolts. As the bolts are gradually tightened, the distance between the pulley body 5 and the end plate 2 is gradually reduced. Since the pulley body 5 has a large dead weight, the sleeve 1 is deformed and clamped on the shaft rod after being subjected to the pressure of the pulley, so that the pulley body 5 is connected to the shaft rod through the expansion sleeve, which can ensure the stability during connection and facilitate loading and unloading operations.

It is to be understood that the present application is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope protected by the present application.

Claims (8)

1. An expansion sleeve, characterized in that: the sleeve body (1) is sleeved between the shaft rod and the belt pulley, the end plate (2) is arranged at one end of the sleeve body (1), the end plate (2) is fixedly connected with the belt pulley through bolts, the sleeve body (1) is of an open type expandable structure, and the outer surface of the sleeve body (1) is a conical cylinder surface.

2. The expansion sleeve of claim 1, wherein: the inner surface of the sleeve body (1) is a straight cylinder surface.

3. The expansion sleeve of claim 1, wherein: a connecting key is also arranged between the shaft lever and the sleeve body (1).

4. The expansion sleeve of claim 1, wherein: the upper part of the end plate (2) is provided with a through hole (3) for disassembly operation.

5. The expansion sleeve of claim 1, wherein: a threaded hole (4) for a disassembly operation is arranged at the upper part of the end plate (2).

6. The expansion sleeve of claim 1, wherein: the taper of the sleeve body (1) is 1:9.375.

7. A pulley having a pulley body (5) and an expansion sleeve according to any one of claims 1 to 5.

8. The pulley as in claim 7, wherein: the inner surface of the belt wheel body (5) is a conical cylinder surface matched with the outer surface of the sleeve body (1).