CN218934803U

CN218934803U - Impeller lower cover fixing structure of water pump

Info

Publication number: CN218934803U
Application number: CN202223109027.3U
Authority: CN
Inventors: 王军舰; 欧阳燕海; 彭玉鲜; 曹慧辉; 侯宇
Original assignee: Zhijing Future Technology Jiangsu Co ltd
Current assignee: Zhijing Future Technology Jiangsu Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-04-28
Anticipated expiration: 2032-11-22

Abstract

The utility model discloses a fixing structure of an impeller lower cover of a water pump. The technical scheme of the utility model is as follows: including impeller lower cover and connecting axle, the impeller lower cover includes the central shaft hole, one side of impeller lower cover is provided with the spacing boss that can supply the connecting axle to wear to establish, be provided with the square spacing groove with central shaft hole intercommunication in the spacing boss, the connecting axle is including inserting the threaded connection section in the central shaft hole, square connecting block with square spacing groove complex, the optical axis of being connected with square connecting block and the mound of being connected with the optical axis, one side of the relative spacing boss of impeller lower cover is provided with the arc protruding piece, the arc protruding piece is worn to establish in the central shaft hole, the part threaded connection of protruding arc protruding piece has the impeller locking cap after the threaded connection section wears to establish the central shaft hole, the impeller locking cap includes the body, the bottom of body is provided with can be with threaded connection section complex screw hole, still be provided with the hexagonal piece of being convenient for install on the body. The scheme provided by the utility model is convenient to assemble and disassemble and long in service life.

Description

Impeller lower cover fixing structure of water pump

Technical Field

The utility model relates to the technical field of filter pumping, in particular to a fixing structure of an impeller lower cover of a water pump.

Background

Most of torque transmission between a pumping impeller and a shaft in the prior art adopts a spline connection structure; this structure has several drawbacks: 1, the spline groove is rolled on the shaft to form a spline shaft, so that the rigidity and the strength of the shaft are weakened; if the material and the thermal refining of the shaft have defects, the shaft breakage phenomenon of some high-power high-lift stamping multistage pumps can occur. 2 this coupling often results in the occurrence of wear to the splined holes on the impeller, such that impeller failure occurs. The shaft end is provided with an inclined plane and is in interference fit with a shaft hole in the impeller lower cover after being punched, and then the shaft assembled with the impeller lower cover is connected with the shaft seat through a screw rod. The utility model provides an impeller lower cover fixing structure which is convenient to assemble, disassemble and maintain and can ensure that the phenomena of broken shaft and abrasion are avoided.

Disclosure of Invention

Aiming at the defects of the prior art, the main purpose of the utility model is to provide the impeller lower cover fixing structure of the water pump, which is convenient to assemble and disassemble and long in service life.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a fixed knot of impeller lower cover of water pump constructs, includes impeller lower cover and connecting axle, the impeller lower cover includes the central shaft hole, one side of impeller lower cover is provided with the spacing boss that can supply the connecting axle to wear to establish, be provided with the square spacing groove with central shaft hole intercommunication in the spacing boss, the connecting axle is including inserting threaded connection section in the central shaft hole, with square spacing groove complex square connecting block, the optical axis of being connected with square connecting block and the axle mound of being connected with the optical axis, one side of the relative spacing boss of impeller lower cover is provided with the protruding piece of arc, the protruding piece of arc is worn to establish by the central shaft hole, the protruding piece of arc's of threaded connection section is provided with the impeller locking cap after wearing to establish in the central shaft hole, the impeller locking cap includes the body, the bottom of body is provided with can with threaded connection section complex screw hole, still be provided with the hexagonal piece of being convenient for install on the body.

Preferably, the bottom of body is provided with annular fixed slot, be provided with the sealing washer in the annular fixed slot, the sealing washer can with the protruding piece butt of arc.

Preferably, the inner angle of the square limit groove and the edge of the direction connecting block are correspondingly provided with chamfer angles or chamfer angle structures.

Preferably, the square limiting groove and the central shaft hole are embedded with stainless steel supporting blocks.

Compared with the prior art, the utility model has the following advantages that one end of the connecting shaft penetrates through the impeller lower cover through the threaded connecting section to be fixedly connected with the impeller locking cap through threads, and the other end of the connecting shaft, namely the shaft pier, is fixedly connected with the motor shaft. The spline groove is not arranged in the central shaft hole of the connecting shaft, but the limiting connection is realized through the square limiting groove arranged in the limiting boss and the square connecting block of the connecting shaft, so that the structural strength of the impeller lower cover can be improved in a phase-changing manner, the situation of spline groove abrasion in the prior art is avoided, and meanwhile, compared with the prior art, the connecting shaft is larger in diameter and higher in structural strength due to the fact that the spline is not arranged in the connecting shaft, and the situation of broken shaft cannot occur. One side of the impeller lower cover, which is opposite to the limiting boss, is provided with an arc-shaped protruding block, the arc-shaped protruding block is abutted with the bottom of the impeller locking cap, and the impeller locking cap can be in sealing connection with the arc-shaped protruding block by arranging an annular fixing groove and a sealing ring at the bottom of the impeller locking cap. The hexagonal block can be arranged to facilitate the disassembly and assembly of the impeller lock cap by using a wrench. The chamfer or chamfer structure can facilitate assembly and reduce the stress locally experienced by the edge. The square limiting groove and the central shaft hole are embedded with the stainless steel supporting blocks, so that the stainless steel supporting blocks bear most of the applied force of the connecting shaft, and the service life of the impeller lower cover is prolonged.

Drawings

Fig. 1 is a schematic structural view of a fixing structure of a lower cover of an impeller of a water pump according to the present utility model;

fig. 2 is a schematic structural diagram II of a fixing structure of a lower cover of an impeller of a water pump according to the present utility model;

FIG. 3 is an exploded view of a lower impeller cover fixing structure of a water pump according to the present utility model;

fig. 4 is a schematic structural view of the impeller lock cap of the present utility model.

In the figure: 1. an impeller lower cover; 2. a connecting shaft; 3. a central shaft hole; 4. a limit boss; 5. square limit groove; 6. a threaded connection section; 7. square connecting block; 8. an optical axis; 9. a shaft pier; 10. arc-shaped protruding blocks; 11. an impeller lock cap; 12. a threaded hole; 13. hexagonal blocks; 14. an annular fixing groove; 15. chamfering or rounding structures; 16. stainless steel supporting blocks.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1, an impeller lower cover 1 fixed knot of water pump constructs, including impeller lower cover 1 and connecting axle 2, impeller lower cover 1 includes central shaft hole 3, one side of impeller lower cover 1 is provided with spacing boss 4 that can supply connecting axle 2 to wear to establish, be provided with in the spacing boss 4 with the square spacing groove 5 of central shaft hole 3 intercommunication, connecting axle 2 is including inserting threaded connection section 6 in the central shaft hole 3, with square spacing groove 5 complex square connecting block 7, with the optical axis 8 of square connecting block 7 connection and the axle mound 9 of being connected with optical axis 8, one side of relative spacing boss 4 on impeller lower cover 1 is provided with arc protruding piece 10, arc protruding piece 10 is worn to establish in central shaft hole 3, protruding arc protruding piece 10's partial threaded connection has impeller locking cap 11 behind the central shaft hole 3, impeller locking cap 11 includes the body, the bottom of body is provided with can with threaded connection section 6 complex screw hole 12, still be provided with six pieces 13 of being convenient for install on the body.

Preferably, an annular fixing groove 14 is formed in the bottom of the body, and a sealing ring is arranged in the annular fixing groove 14 and can be abutted against the arc-shaped protruding block 10.

Preferably, the inner angle of the square limit groove 5 and the edge of the direction connecting block are correspondingly provided with a chamfer or rounding structure 15.

Preferably, stainless steel supporting blocks 16 are embedded in the square limiting grooves 5 and the central shaft hole 3.

According to the impeller lower cover 1 fixing structure of the water pump, aiming at the situation that a main shaft is required to be detached when parts are replaced in the prior art if the impeller is required to be detached, particularly, the main shaft is difficult to detach after the motor shaft is oxidized, and related parts cannot be detached due to the fact that the impeller cannot be detached, so that the connecting shaft 2 can be detached only after part parts are detached destructively. The design of the fastening mode of the impeller is changed, and the impeller can be conveniently and rapidly detached only by unscrewing the impeller locking cap 11, so that the parts needing maintenance are replaced. Specifically, one end of the connecting shaft 2 passes through the impeller lower cover 1 through the threaded connecting section 6 to be fixedly connected with the impeller lock cap 11 through threads, and the other end of the connecting shaft 2, namely the shaft pier 9, is fixedly connected with a motor shaft. The spline groove is not arranged in the central shaft hole 3 of the connecting shaft 2, but the limiting boss 4 is arranged, the square limiting groove 5 arranged in the limiting boss 4 is in limiting connection with the square connecting block 7 of the connecting shaft 2, the structural strength of the limiting boss 4 is high, the service life of the impeller lower cover 1 is prolonged, the structural strength of the impeller lower cover 1 can be improved in a phase-changing manner, the situation that the spline groove is worn in the prior art is avoided, and meanwhile, the connecting shaft 2 is larger in diameter and higher in structural strength compared with the prior art because no spline is arranged. Wherein, one side of the impeller lower cover 1, which is opposite to the limit boss 4, is provided with an arc-shaped protruding block 10, the arc-shaped protruding block 10 is abutted with the bottom of the impeller locking cap 11, and the impeller locking cap 11 can be in sealing connection with the arc-shaped protruding block 10 by arranging an annular fixing groove 14 and a sealing ring at the bottom of the impeller locking cap 11. The hexagonal block 13 is provided to facilitate the disassembly and assembly of the impeller lock cap 11 by using a wrench. The chamfer or fillet structure 15 can facilitate assembly and reduce the stress to which the edge is locally subjected. The square limiting groove 5 and the central shaft hole 3 are embedded with the stainless steel supporting blocks 16, and the advantage of the arrangement is that most of the applied force of the connecting shaft 2 is born through the stainless steel supporting blocks 16, so that the service life of the impeller lower cover 1 is prolonged.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a fixed knot of impeller lower cover of water pump constructs, includes impeller lower cover and connecting axle, its characterized in that: the impeller lower cover comprises a central shaft hole, one side of the impeller lower cover is provided with a limiting boss through which a connecting shaft passes, a square limiting groove communicated with the central shaft hole is formed in the limiting boss, the connecting shaft comprises a threaded connecting section inserted into the central shaft hole, a square connecting block matched with the square limiting groove, an optical axis connected with the square connecting block and an axle pier connected with the optical axis, one side of the impeller lower cover opposite to the limiting boss is provided with an arc-shaped protruding block, the central shaft hole passes through the arc-shaped protruding block, part of threads of the threaded connecting section, protruding arc-shaped protruding block, after passing through the central shaft hole, is connected with an impeller locking cap, the impeller locking cap comprises a body, the bottom of the body is provided with a threaded hole matched with the threaded connecting section, and a hexagonal block convenient to install is further arranged on the body.

2. The impeller lower cover fixing structure of a water pump according to claim 1, characterized in that: the bottom of body is provided with annular fixed slot, be provided with the sealing washer in the annular fixed slot, the sealing washer can with the protruding piece butt of arc.

3. The impeller lower cover fixing structure of a water pump according to claim 1, characterized in that: the inner angle of square spacing groove and the edge of direction connecting block correspond and are provided with chamfer or chamfer structure.

4. The impeller lower cover fixing structure of a water pump according to claim 1, characterized in that: and stainless steel supporting blocks are embedded in the square limiting grooves and the central shaft holes.