CN220286024U

CN220286024U - Coupling for pump

Info

Publication number: CN220286024U
Application number: CN202321851678.1U
Authority: CN
Inventors: 雒满福; 王�琦; 彭家耀; 李雪梅; 赵海涛
Original assignee: Zhejiang Nanpump Fluid Machinery Co ltd
Current assignee: Zhejiang Nanpump Fluid Machinery Co ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2024-01-02
Anticipated expiration: 2033-07-14

Abstract

The utility model relates to the technical field of couplings, in particular to a coupling for a pump, which comprises two coupling bodies, wherein motor shaft holes and pump shaft holes which are semi-cylindrical are respectively formed in two ends of each coupling body, raised positioning convex surfaces are arranged on the splicing surfaces of the coupling bodies, the positioning convex surfaces are symmetrically distributed on two sides of each motor shaft hole and each pump shaft hole, and the positioning convex surfaces of the two coupling bodies are in one-to-one correspondence fit. According to the utility model, the positioning convex surface is arranged on the splicing surface of the coupler body, so that the finish machining of the positioning convex surface in the later stage is facilitated, the flatness of the positioning convex surface is convenient to control, the mounting precision of the two coupler bodies is further controlled, and the coaxiality of the motor shaft and the pump shaft connection is improved.

Description

Coupling for pump

Technical Field

The utility model relates to the technical field of couplings, in particular to a coupling for a pump.

Background

The transmission shaft of the existing water pump is connected with the power shaft of the motor through a coupling, so that the rotation of the impeller in the water pump is realized. The existing shaft couplings for water pumps are of two-piece structures, and two ends of the existing shaft couplings are respectively installed on shafts of the water pumps and motors for positioning during installation.

For example, chinese patent publication No. CN206071934U discloses a coupling for a pump, which comprises a coupling body, the coupling body comprises two coupling halves, the coupling halves are provided with a semi-cylindrical motor shaft hole and a semi-cylindrical pump shaft hole, and the coupling halves are manufactured by adopting a powder metallurgy process, so that the flatness of the split surfaces of the two coupling halves is low, the area of the split surfaces is large, which is not beneficial to the post-finishing, the coaxiality tolerance of the motor shaft and the pump shaft connection is large, and the dynamic balance of the pump is affected.

Disclosure of Invention

The utility model provides a coupling for a pump, which aims to solve the technical problems and improve the coaxiality of connection of a motor shaft and a pump shaft.

The above object of the present utility model is achieved by the following technical solutions: the utility model provides a shaft coupling for pump, includes two shaft coupling bodies, the both ends of shaft coupling body divide to be equipped with and are semi-cylindrical motor shaft hole and pump shaft hole, be provided with bellied location convex surface on the amalgamation face of shaft coupling body, location convex surface symmetric distribution is in motor shaft hole and pump shaft hole's both sides, two the location convex surface one-to-one laminating of shaft coupling body.

Preferably, the positioning convex surface is strip-shaped, and the length of the positioning convex surface is smaller than that of the motor shaft hole or the pump shaft hole.

Preferably, the inner side surface of the positioning convex surface is tangent to the inner walls of the motor shaft hole and the pump shaft hole.

Preferably, the distance between the two coupling bodies is 3-4mm.

Preferably, a connecting groove is arranged between the motor shaft hole and the pump shaft hole, and the diameter of the connecting groove is larger than that of the motor shaft hole and the pump shaft hole.

Preferably, the coupling body is provided with at least two rows of connecting holes along the axial direction.

Preferably, semicircular baffle rings which are distributed at intervals are arranged on the outer side of the coupler body, the semicircular baffle rings are located at one end close to the motor shaft hole, a connecting portion is arranged between the end portions of the two semicircular baffle rings, and the connecting portion is provided with the connecting hole.

The utility model has the beneficial effects that: according to the utility model, the positioning convex surface is arranged on the splicing surface of the coupler body, so that the finish machining of the positioning convex surface in the later stage is facilitated, the flatness of the positioning convex surface is convenient to control, the mounting precision of the two coupler bodies is further controlled, and the coaxiality of the motor shaft and the pump shaft connection is improved.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present utility model;

fig. 2 is a schematic structural view of a coupling body in embodiment 1 of the present utility model;

in the figure: the coupling comprises a 1-coupling body, a 101-motor shaft hole, a 102-pump shaft hole, a 103-connecting groove, a 104-splicing surface, a 105-positioning convex surface, a 106-connecting hole, a 107-semicircular baffle ring and a 108-connecting part.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model, may be made by those skilled in the art after reading the present specification, are only protected by patent laws within the scope of the claims of the present utility model.

Examples:

as shown in fig. 1 and 2, a coupling for a pump includes two coupling bodies 1, and motor shaft holes 101 and pump shaft holes 102 having a semi-cylindrical shape are respectively provided at both ends of the coupling bodies 1. The coupling body 1 is provided with raised positioning convex surfaces 105 on the split surface 104, the positioning convex surfaces 105 are symmetrically distributed on two sides of the motor shaft hole 101 and the pump shaft hole 102, the four positioning convex surfaces 105 are positioned in the same plane, and the positioning convex surfaces 105 of the two coupling bodies 1 are correspondingly attached one by one.

The positioning convex surface 105 is strip-shaped, and the length of the positioning convex surface 105 is smaller than the length of the motor shaft hole 101 or the pump shaft hole 102.

In other embodiments, the shape of the locating convex surface 105 may be circular or other polygonal.

The inner side surface of the positioning convex surface 105 is tangent to the inner walls of the motor shaft hole 101 and the pump shaft hole 102.

The split surfaces 104 of the two coupling bodies 1 have a distance d of 3-4mm.

Because the shaft coupling body 1 adopts cast molding, the amalgamation face 104 area of the shaft coupling body 1 is great, is unfavorable for carrying out finish machining to the amalgamation face 104 and improves the planarization of amalgamation face 104, can not guarantee the rotor dynamic balance of installation completion, therefore this application sets up location convex surface 105 on amalgamation face 104, because location convex surface 105 area is little, the easy control planarization when finish machining, shaft coupling body 1 cooperates through four location convex surfaces 105 when the assembly and improves assembly precision to improve motor shaft and pump shaft connection's axiality and rotor dynamic balance.

After installation, the end face of the motor shaft is flush with the inner end face of the motor shaft hole 101, and the end face of the pump shaft is flush with the inner end face of the pump shaft hole 102.

In order to reduce the weight of the coupling body 1, a connecting groove 103 is provided between the motor shaft hole 101 and the pump shaft hole 102 in the present embodiment, and the diameter of the connecting groove 103 is larger than that of the motor shaft hole 101 and the pump shaft hole 102. In other embodiments, the connecting slot 103 may not be machined such that the motor shaft bore 101 and the pump shaft bore 102 are blind bores.

Two or three rows of connecting holes 106 are axially arranged on the coupling body 1, and in this embodiment, the connecting holes 106 are two rows and distributed at two ends of the coupling half body. One of the coupling body 1 is provided with a through hole 106, the other coupling body 1 is provided with a threaded hole 106, and an inner hexagon bolt is arranged in the connecting hole 106.

The outer side of the coupler body 1 is provided with semicircular baffle rings 107 which are distributed at intervals, the semicircular baffle rings 107 are positioned at one end close to the motor shaft hole 101, a connecting part 108 is arranged between the end parts of the two semicircular baffle rings 107, and a connecting hole 106 is arranged on the connecting part 108.

Claims

1. The utility model provides a shaft coupling for pump, includes two shaft coupling body (1), the both ends of shaft coupling body (1) divide to be equipped with motor shaft hole (101) and pump shaft hole (102) that are semi-cylindrical, a serial communication port, be provided with bellied location convex surface (105) on amalgamation face (104) of shaft coupling body (1), location convex surface (105) symmetric distribution is in motor shaft hole (101) and the both sides of pump shaft hole (102), two location convex surface (105) one-to-one laminating of shaft coupling body (1).

2. A coupling for pumps as defined in claim 1, wherein: the positioning convex surface (105) is strip-shaped, and the length of the positioning convex surface (105) is smaller than that of the motor shaft hole (101) or the pump shaft hole (102).

3. A coupling for pumps as claimed in claim 2, wherein: the inner side surface of the positioning convex surface (105) is tangent to the inner walls of the motor shaft hole (101) and the pump shaft hole (102).

4. A coupling for pumps as defined in claim 1, wherein: the distance between the splicing surfaces (104) of the two coupling bodies (1) is 3-4mm.

5. A coupling for pumps as defined in claim 1, wherein: a connecting groove (103) is formed between the motor shaft hole (101) and the pump shaft hole (102), and the diameter of the connecting groove (103) is larger than that of the motor shaft hole (101) and the pump shaft hole (102).

6. A coupling for pumps as defined in claim 1, wherein: at least two rows of connecting holes (106) are axially arranged on the coupler body (1).

7. A coupling for pumps as defined in claim 6, wherein: the novel motor shaft coupling is characterized in that semicircular baffle rings (107) which are distributed at intervals are arranged on the outer side of the coupling body (1), the semicircular baffle rings (107) are located at one end close to the motor shaft hole (101), connecting portions (108) are arranged between the end portions of the two semicircular baffle rings (107), and connecting holes (106) are formed in the connecting portions (108).