CN210343482U

CN210343482U - Automobile water pump

Info

Publication number: CN210343482U
Application number: CN201921514343.4U
Authority: CN
Inventors: 郭显强
Original assignee: Yuhuan Hongze Automobile Pump Co Ltd
Current assignee: Yuhuan Hongze Automobile Pump Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-04-17
Anticipated expiration: 2029-09-12

Abstract

The utility model provides an automobile water pump belongs to auto-parts technical field. The pump shaft of the automobile water pump solves the problems that the pump shaft of the existing automobile water pump is unstable in rotation, and the pump shaft and the pump body are abraded mutually due to relative movement, so that the service life of the water pump is shortened. This automobile water pump includes the pump body and sets up the pump shaft in the pump body, it is connected with the pump body rotation to be provided with the bearing and this pump shaft between the pump body and the pump shaft through the bearing, the pump body is stretched out at the both ends of pump shaft, the upper end of pump shaft is provided with ring flange and this ring flange and pump shaft fixed fit, the lower extreme of pump shaft is provided with impeller and this impeller and pump shaft axial sliding fit, be provided with the mechanical seal that sealed action acted on the pump body on the pump shaft between impeller and the bearing, be provided with between impeller and the pump shaft and enable the impeller at the epaxial axial sliding. The utility model discloses construct simply, can effectively prevent the relative motion of pump shaft and the pump body and wearing and tearing, long service life.

Description

Automobile water pump

Technical Field

The utility model belongs to the technical field of auto-parts, a car water pump is related to.

Background

In the cylinder body of the automobile engine, a plurality of water channels for cooling water circulation are arranged and connected with a radiator arranged at the front part of the automobile through water pipes to form a large water circulation system. A water pump is arranged at the upper water outlet of the engine and is driven by a fan belt to pump hot water out of a water channel of the engine cylinder body and pump cold water in the water channel. The automobile engine widely adopts a centrifugal water pump, and the basic structure of the centrifugal water pump comprises a water pump body, a connecting disc or a belt pulley, a water pump shaft, a bearing, a water pump impeller, a sealing device and other parts. The automobile water pump is an important component of an automobile engine.

The existing automobile water pump is as follows: "201821992143.5" the automobile water pump, its concrete structure is: the pump comprises a pump body, a pump shaft and an impeller, wherein the pump shaft and the impeller are both arranged in the pump body, and the pump shaft is rotatably connected with the pump body through a bearing.

In the structure, the impeller and the pump shaft are fixedly connected in the circumferential direction and are connected in a rigid connection mode; when the pump shaft rotates, the impeller absorbs water, the centrifugal dehydration is carried out, and the fan connected to the flange plate can generate axial force under the driving of the pump shaft, so that the axial force can drive the pump shaft and the pump body to move relatively, the mutual abrasion between the pump shaft and the pump body can be caused, the service life of the water pump is shortened, and the service life of the pump shaft is shortened.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, prevent the relative motion of pump shaft and the pump body and wearing and tearing, long service life's automobile water pump.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides an automobile water pump, includes the pump body and sets up the pump shaft in the pump body, the pump body and pump shaft between be provided with the bearing and this pump shaft passes through the bearing and is connected with the pump body rotation, the both ends of pump shaft stretch out the pump body, a serial communication port, the upper end of pump shaft be provided with ring flange and this ring flange and pump shaft fixed coordination, the lower extreme of pump shaft be provided with impeller and this impeller and pump shaft axial sliding fit, impeller and bearing between the pump shaft on be provided with the mechanical seal who seals and act on the pump body, impeller and pump shaft between be provided with the elastic buffer who enables the impeller and axial sliding energy-absorbing on the pump shaft.

This automobile water pump mainly sets up elastic buffer between impeller and pump shaft to produce axial force when making the pump shaft rotate through elastic buffer and offset the energy-absorbing between pump shaft and impeller, cause the pump shaft rotational stability, prevent the relative motion of pump shaft and the pump body and wearing and tearing, long service life.

In the automobile water pump, the impeller comprises a cylindrical connecting seat, a disc body which is connected with the connecting seat into a whole is arranged at the upper end of the connecting seat, blades which are arranged in a downward protruding mode are distributed on the disc body at intervals in the circumferential direction, the impeller is sleeved at the end of the lower end of the pump shaft in an axial sliding mode through the connecting seat, and a limiting structure which prevents the impeller from axially sliding to be separated from the pump shaft is arranged between the impeller and the pump shaft. The cylindrical center hole of the connecting seat is axially matched with the end part of the lower end of the pump shaft in a sliding manner.

In foretell automobile water pump, limit structure including being transverse distribution's spacer pin, the pump shaft on have and be radial limiting hole that sets up and this limiting hole runs through the pump shaft, be provided with the connecting hole on the disk body of the impeller relative with limiting hole axial, the spacer pin transversely wear to locate the limiting hole in and the both ends of this spacer pin all stretch out from the connecting hole on the disk body of impeller, the end that stretches out at the both ends of spacer pin all linked firmly stop nut. The two ends of the limit pin are provided with external threads, the inner wall of the limit nut is provided with internal threads, and the limit nut is correspondingly and spirally connected on the external threads at the two ends of the limit pin through the internal threads; when the impeller axially slides to the uppermost end on the pump shaft, the limiting pin transversely abuts against the upper hole wall of the limiting hole; when the impeller axially slides on the pump shaft to the lowest end, the limiting pin transversely abuts against the lower hole wall of the limiting hole.

In the automobile water pump, the aperture of the limiting hole is larger than the diameter of the limiting pin, and the aperture of the connecting hole is matched with the diameter of the limiting pin. Two ends of the limiting pin extend out of the connecting hole, and the limiting pin and the disc body of the impeller are fixed relatively.

In the automobile water pump, the elastic buffer device comprises a connecting bolt with a head, a through hole is formed in the bottom of the connecting seat, the connecting bolt penetrates through the through hole and is fixedly connected to the end portion of the lower end of the pump shaft, a first compression spring is arranged between the bottom of the connecting seat and the end portion of the lower end of the pump shaft, the upper end of the first compression spring is elastically abutted against the end face of the lower end of the pump shaft, the lower end of the first compression spring is elastically abutted against the inner bottom face of the bottom of the connecting seat, a second compression spring is arranged between the bottom of the connecting seat and the head of the connecting bolt, the upper end of the second compression spring is elastically abutted against the outer bottom face of the bottom of the connecting seat, and the lower end of the second compression spring is elastically abutted against the head of the connecting bolt. When the pump shaft rotates, an axial force is generated, and when the impeller is driven by the axial force to move axially upwards on the pump shaft, energy is absorbed and compensated relatively by the elastic action of the first compression spring and the axial force; when the pump shaft rotates, an axial force is generated, and when the impeller is driven by the axial force to move axially and downwards on the pump shaft, the elastic action of the second compression spring and the axial force are opposite to absorb energy and compensate.

In the automobile water pump, the end face of the lower end of the pump shaft is provided with a connecting blind hole, the inner wall of the connecting blind hole is provided with an internal thread, the outer wall of the connecting bolt is provided with an external thread, and the connecting bolt is spirally connected to the internal thread of the connecting blind hole through the external thread. The purpose of setting up like this is convenient connecting bolt at the lower extreme assembly connection of pump shaft, and it is convenient to make.

Compared with the prior art, this automobile water pump's advantage does: simple structure can effectively prevent the relative motion of pump shaft and the pump body and wearing and tearing, and stable in structure and pump shaft stability of rotation are high, and the relative assembly precision requirement of pump shaft and impeller is lower, long service life.

Drawings

Fig. 1 is a schematic sectional structure view of the water pump for an automobile.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

In the figure, 1, a pump body; 2. a pump shaft; 3. a bearing; 4. a flange plate; 5. mechanical sealing; 6. a connecting seat; 7. a disc body; 8. a blade; 9. a spacing pin; 10. a limiting hole; 11. a limit nut; 12. a head portion; 13. a connecting bolt; 14. a first compression spring; 15. and a second compression spring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the automobile water pump mainly comprises a pump body 1 and a pump shaft 2 arranged in the pump body 1, wherein a bearing 3 is arranged between the pump body 1 and the pump shaft 2, the pump shaft 2 is rotatably connected with the pump body 1 through the bearing 3, two ends of the pump shaft 2 extend out of the pump body 1, a flange 4 is arranged at the upper end of the pump shaft 2, the flange 4 is fixedly matched with the pump shaft 2, an impeller is arranged at the lower end of the pump shaft 2, the impeller is axially and slidably matched with the pump shaft 2, and a mechanical seal 5 which is sealed and acts on the pump body 1 is arranged on the pump shaft 2 between the impeller; during actual manufacturing, the specific arrangement structure of the impeller is as follows: mainly constitute by the connecting seat 6 that is the tube-shape, the upper end of connecting seat 6 has the disk body 7 even as an organic whole with connecting seat 6, and circumference interval distribution has the blade 8 that is the downward protruding setting on the disk body 7, and the impeller cup joints the tip at the lower extreme of pump shaft 2 through 6 axial sliding of connecting seat, is provided with the limit structure who prevents impeller axial sliding and break away from pump shaft 2 between impeller and the pump shaft 2.

During actual manufacturing, the specific implementation mode of the limiting structure is as follows: the pump shaft is mainly composed of limiting pins 9 which are transversely distributed, wherein the pump shaft 2 is provided with a radial limiting hole 10, the limiting hole 10 penetrates through the pump shaft 2, a connecting hole is formed in a disc body 7 of the impeller, the disc body is axially opposite to the limiting hole 10, the limiting pins 9 are transversely arranged in the limiting holes 10 in a penetrating mode, two ends of each limiting pin 9 extend out of the connecting holes in the disc body 7 of the impeller, and extending ends of two ends of each limiting pin 9 are fixedly connected with limiting nuts 11; in practical application, the aperture of the limiting hole 10 is larger than the diameter of the limiting pin 9, and the aperture of the connecting hole is matched with the diameter of the limiting pin 9.

An elastic buffer device which can enable the impeller to axially slide on the pump shaft 2 to absorb energy is arranged between the impeller and the pump shaft 2; in actual manufacturing, the specific implementation mode of the elastic buffer device is as follows: the pump shaft connecting structure mainly comprises a connecting bolt 13 with a head 12, a through hole is formed in the bottom of a connecting seat 6, the connecting bolt 13 penetrates through the through hole and is fixedly connected to the end portion of the lower end of a pump shaft 2, a first compression spring 14 is arranged between the bottom of the connecting seat 6 and the end portion of the lower end of the pump shaft 2, the upper end of the first compression spring 14 is elastically abutted against the end face of the lower end of the pump shaft 2, the lower end of the first compression spring 14 is elastically abutted against the inner bottom face of the bottom of the connecting seat 6, a second compression spring 15 is arranged between the bottom of the connecting seat 6 and the head 12 of the connecting bolt 13, the upper end of the second compression spring 15 is elastically abutted against the outer bottom face of the bottom of the connecting seat 6, and the lower.

In practical application, a connecting blind hole is formed in the end face of the lower end of the pump shaft 2, an internal thread is formed in the inner wall of the connecting blind hole, an external thread is formed in the outer wall of the connecting bolt 13, and the connecting bolt 13 is connected to the internal thread of the connecting blind hole through the external thread in a screwed mode.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An automobile water pump comprises a pump body (1) and a pump shaft (2) arranged in the pump body (1), a bearing (3) is arranged between the pump body (1) and the pump shaft (2), the pump shaft (2) is rotationally connected with the pump body (1) through the bearing (3), two ends of the pump shaft (2) extend out of the pump body (1), it is characterized in that the upper end of the pump shaft (2) is provided with a flange (4), the flange (4) is fixedly matched with the pump shaft (2), the lower end of the pump shaft (2) is provided with an impeller which is in axial sliding fit with the pump shaft (2), a mechanical seal (5) which acts on the pump body (1) in a sealing way is arranged on the pump shaft (2) between the impeller and the bearing (3), an elastic buffer device which can enable the impeller to axially slide on the pump shaft (2) for energy absorption is arranged between the impeller and the pump shaft (2).

2. The automobile water pump according to claim 1, characterized in that the impeller comprises a cylindrical connecting seat (6), a disc body (7) connected with the connecting seat (6) into a whole is arranged at the upper end of the connecting seat (6), blades (8) protruding downwards are distributed on the disc body (7) at intervals in the circumferential direction, the impeller is sleeved at the end part of the lower end of the pump shaft (2) through the connecting seat (6) in an axial sliding manner, and a limiting structure for preventing the impeller from axially sliding to be separated from the pump shaft (2) is arranged between the impeller and the pump shaft (2).

3. The automobile water pump according to claim 2, characterized in that the limiting structure comprises transversely distributed limiting pins (9), the pump shaft (2) is provided with radially arranged limiting holes (10), the limiting holes (10) penetrate through the pump shaft (2), the disk body (7) of the impeller, which is axially opposite to the limiting holes (10), is provided with connecting holes, the limiting pins (9) transversely penetrate through the limiting holes (10), two ends of the limiting pins (9) extend out of the connecting holes in the disk body (7) of the impeller, and extending ends of two ends of the limiting pins (9) are fixedly connected with limiting nuts (11).

4. The automobile water pump according to claim 3, characterized in that the aperture of the limiting hole (10) is larger than the diameter of the limiting pin (9), and the aperture of the connecting hole is matched with the diameter of the limiting pin (9).

5. The automobile water pump according to claim 4, characterized in that the elastic buffer device comprises a connecting bolt (13) with a head (12), the bottom of the connecting seat (6) is provided with a through hole, the connecting bolt (13) is fixedly connected to the end of the lower end of the pump shaft (2) through the through hole, a first compression spring (14) is arranged between the bottom of the connecting seat (6) and the end of the lower end of the pump shaft (2), the upper end of the first compression spring (14) is elastically abutted against the end face of the lower end of the pump shaft (2), the lower end of the first compression spring (14) is elastically abutted against the inner bottom face of the bottom of the connecting seat (6), a second compression spring (15) is arranged between the bottom of the connecting seat (6) and the head (12) of the connecting bolt (13), the upper end of the second compression spring (15) is elastically abutted against the outer bottom face of the bottom of the connecting seat (6), the lower end of the second compression spring (15) is elastically abutted against the head (12) of the connecting bolt (13).

6. The automobile water pump according to claim 5, characterized in that a blind connecting hole is formed in the end face of the lower end of the pump shaft (2), internal threads are formed in the inner wall of the blind connecting hole, external threads are formed in the outer wall of the connecting bolt (13), and the connecting bolt (13) is screwed into the internal threads of the blind connecting hole through the external threads.