Novel shaft mounting structure

Abstract

The utility model relates to the technical field of automobile water pumps, in particular to a novel shaft installation structure which is convenient to install, improves the strength of an installed shaft and prolongs the service life. Comprising a volute, a ceramic gasket, a shaft and a machine shell, the volute is connected with the machine shell, an upper connecting part is arranged in the middle of the volute, a lower connecting part is arranged in the machine shell, the upper end and the lower end of the shaft are installed in the volute and the machine shell through the upper connecting part and the lower connecting part, and the ceramic gasket is installed at the upper end of the shaft and makes contact with the upper connecting part.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive water pumps, in particular to a novel shaft mounting structure. Background Art

[0002] As the power source of the automotive cooling circulation system, the water pump takes away the heat of the automotive engine by circulating the coolant to ensure the normal operation of the engine. Therefore, the water pump plays a crucial role in the vehicle. A prior art automotive water pump shaft disclosed in the patent publication No. CN215566820U includes a rotating shaft, an inner shaft shell is sleeved in the middle of the outer side of the rotating shaft, bearings are rotatably connected to the upper end and the bottom end of the outer side of the inner shaft shell, an intermediate shaft shell is sleeved outside the bearings, a fluororubber cushion layer is arranged outside the intermediate shaft shell, and an outer shaft shell is sleeved outside the fluororubber cushion layer. However, with the continuous development of thermal management technology, automotive component suppliers are constantly required to use lower costs and achieve higher performance. This has led to the emergence of a process of integrally injecting the shaft and the wet area of the water pump. The performance of the motor is higher, which also puts forward higher requirements for the injection molding process, and higher strength is required for the part that fixes the shaft. Summary of the Utility Model

[0003] To solve the above technical problems, the utility model provides a novel shaft mounting structure that is convenient for installation, increases the strength after the shaft is installed, and improves the service life.

[0004] A novel shaft mounting structure of the utility model includes a volute, a ceramic gasket, a shaft and a housing. The volute is connected to the housing. An upper connecting component is arranged in the middle of the volute, and a lower connecting component is arranged inside the housing. The upper and lower ends of the shaft are installed inside the volute and the housing through the upper connecting component and the lower connecting component. A ceramic gasket is installed at the upper end of the shaft and contacts the upper connecting component. The installation strength of the upper end of the shaft is ensured by integrally injecting the upper connecting component. The shaft is fixed by the upper connecting component and the lower connecting component at the same time, greatly increasing the strength after the shaft is installed, and ensuring that the rotor will not loosen during operation with higher performance for a longer time.

[0005] Preferably, the upper connecting component includes a plurality of connecting rods and an upper fixing seat. The plurality of connecting rods are axially and uniformly connected to the inner wall of the upper part of the volute. The bottom of the connecting rod is connected to the upper fixing seat. A positioning rotating hole matching the shaft is opened at the bottom of the upper fixing seat. The ceramic gasket is located at the bottom of the positioning rotating hole of the upper fixing seat. The connecting rod and the upper fixing seat are injection-molded with the volute housing. The integral injection molding of the volute, the connecting rod and the upper fixing seat reduces the number of incoming parts for assembly, and has more cost advantages. The installation strength of the upper end of the shaft can be ensured through the connecting rod and the upper fixing seat.

[0006] Preferably, the lower fixing member includes an extension ring, a plurality of reinforcing ribs and a lower fixing seat. The extension ring is located at the inner bottom end of the housing, the lower fixing seat is located inside the extension ring, and a plurality of reinforcing ribs are axially and evenly connected between the lower fixing seat and the extension ring. A lower rotation hole is formed in the middle of the lower fixing seat. The extension ring, the reinforcing ribs and the lower fixing seat are integrally injection-molded with the housing. The bottom of the shaft is installed through the lower rotation hole of the lower fixing seat, and both the upper and lower ends are fixed at the same time, greatly increasing the strength of the shaft after installation, ensuring that the rotor with higher performance will not loosen during operation for a longer time. The extension ring and the reinforcing ribs can ensure the structural strength of the lower fixing seat and improve the service life.

[0007] Preferably, the lower end of the shaft is conical, and the lower rotation hole in the middle of the lower fixing seat is a tapered hole. The tapered hole is machined by machining, and the machining method can ensure the accuracy of the hole shape and position to the greatest extent. The conical structure at the lower end of the shaft has a correction effect, which is convenient for installation and provides sufficient guidance, so that the coaxiality of the shaft is corrected and the lower limit of the size is ensured.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows: the installation strength of the upper end of the shaft is ensured by the integrally injection-molded upper connecting member, and the shaft is fixed by the upper connecting member and the lower connecting member at the same time, greatly increasing the strength of the shaft after installation, ensuring that the rotor with higher performance will not loosen during operation for a longer time. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of the present utility model;

[0010] Figure 2 is a schematic internal structural diagram of the present utility model;

[0011] Figure 3 is a schematic combined structure diagram of the volute assembly;

[0012] Figure 4 is a schematic structural diagram of the housing of the present utility model;

[0013] Figure 5 is a schematic front view sectional structural diagram of the present utility model;

[0014] Reference numerals in the drawings: 1, volute; 2, ceramic gasket; 3, shaft; 4, housing; 5, connecting rod; 6, upper fixing seat; 7, extension ring; 8, reinforcing rib; 9, lower fixing seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In order to facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present utility model will be thorough and comprehensive.

[0016] As shown Figures 1 to 5 in the figure, the volute 1 is connected to the casing 4. A plurality of connecting rods 5 are axially and uniformly connected to the upper inner wall of the volute 1. A upper fixing seat 6 is connected to the bottom of the connecting rod 5. A positioning rotating hole matching the shaft 3 is provided at the bottom of the upper fixing seat 6. A ceramic gasket 2 is installed at the upper end of the shaft 3. The ceramic gasket 2 is located at the bottom of the positioning rotating hole of the upper fixing seat 6. The connecting rod 5 and the upper fixing seat 6 are integrally injection molded with the volute 1. The extension ring 7 is located at the inner bottom end of the casing 4. The lower fixing seat 9 is located inside the extension ring 7. A plurality of reinforcing ribs 8 are axially and uniformly connected between the lower fixing seat 9 and the extension ring 7. A lower rotating hole is provided in the middle of the lower fixing seat 9. The extension ring 7, the reinforcing ribs 8 and the lower fixing seat 9 are integrally injection molded with the casing 4. The lower end of the shaft 3 is conical, and the lower rotating hole in the middle of the lower fixing seat 9 is a conical hole;

[0017] The integral injection molding of the volute 1, the connecting rod 5 and the upper fixing seat 6 reduces the number of incoming parts for general assembly, and the cost is more advantageous. The installation strength of the upper end of the shaft 3 can be ensured through the connecting rod 5 and the upper fixing seat 6. The bottom of the shaft 3 is installed through the lower rotating hole of the lower fixing seat 9, and both the upper and lower ends are fixed simultaneously, greatly increasing the strength of the shaft after installation, ensuring that the rotor with higher performance will not loosen during operation for a longer time. The extension ring 7 and the reinforcing ribs 8 can ensure the structural strength of the lower fixing seat 9 and improve the service life. The processing method of the conical hole is machining. The machining form can ensure the accuracy of the hole shape and position to the greatest extent. The conical structure at the lower end of the shaft 3 has a corrective effect, is convenient for installation and provides sufficient guidance, so that the coaxiality of the shaft is corrected and the size lower limit is ensured.

[0018] As shown Figures 1 to 5 in the figure, for a novel shaft installation structure of the present utility model, the integral injection molding of the volute 1, the connecting rod 5 and the upper fixing seat 6 reduces the number of incoming parts for general assembly. The installation strength of the upper end of the shaft 3 can be ensured through the connecting rod 5 and the upper fixing seat 6. The bottom of the shaft 3 is installed through the lower rotating hole of the lower fixing seat 9, and both the upper and lower ends are fixed simultaneously, greatly increasing the strength of the shaft after installation, ensuring that the rotor with higher performance will not loosen during operation for a longer time. The extension ring 7 and the reinforcing ribs 8 can ensure the structural strength of the lower fixing seat 9.

[0019] The main functions achieved by the present utility model are: 1. The assembly is simpler, reducing the investment in production lines and labor; 2. Both the upper and lower ends of the shaft are fixed simultaneously, greatly increasing the strength of the shaft after installation, ensuring that the rotor with higher performance will not loosen during operation for a longer time; 3. The conical structure at the installation position of the shaft and the casing ensures the lower limit of the shaft installation size.

[0020] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A new type of shaft installation structure, characterized in that: The invention comprises a volute (1), a ceramic gasket (2), a shaft (3) and a casing (4); the volute (1) is connected to the casing (4); an upper connecting component is arranged in the middle of the volute (1); a lower connecting component is arranged inside the casing (4); upper and lower ends of the shaft (3) are installed inside the volute (1) and the casing (4) through the upper connecting component and the lower connecting component; a ceramic gasket (2) is installed at the upper end of the shaft (3) and contacts with the upper connecting component.

2. A novel shaft mounting structure as claimed in claim 1, characterized in that: The upper connecting component comprises a plurality of connecting rods (5) and an upper fixing seat (6); the plurality of connecting rods (5) are axially evenly connected to the upper inner wall of the volute (1); the bottom of the connecting rod (5) is connected to the upper fixing seat (6); a positioning rotating hole matching the shaft (3) is provided at the bottom of the upper fixing seat (6); a ceramic gasket (2) is located at the bottom of the positioning rotating hole of the upper fixing seat (6); and the connecting rod (5) and the upper fixing seat (6) are injection molded with the volute (1) body.

3. A novel shaft mounting structure as claimed in claim 1, characterized in that: The lower fixing component comprises an extension ring (7), a plurality of reinforcing ribs (8) and a lower fixing seat (9); the extension ring (7) is located at the inner bottom end of the housing (4); the lower fixing seat (9) is located inside the extension ring (7); a plurality of reinforcing ribs (8) are evenly connected axially between the lower fixing seat (9) and the extension ring (7); a lower rotation hole is opened in the middle of the lower fixing seat (9); the extension ring (7), the reinforcing ribs (8) and the lower fixing seat (9) are integrally injection molded with the housing (4).

4. A novel shaft mounting structure as claimed in claim 3, characterized in that: The lower end of the shaft (3) is configured to be conical, and the lower rotation hole in the middle of the lower fixing seat (9) is a conical hole.

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