Compact automotive water pump thin wall housing

Abstract

The utility model provides a compact type car water pump thin wall shell, including water pump motor seat, water pump motor seat and water pump chamber shell integral setting together, wherein water pump chamber shell is provided with reinforcing grid, and is fixed through bolt installation end cover shell, integral setting has drain passage, water inlet and end cover reinforcing plate on end cover shell, drain passage and water outlet are integral intercommunication arrangement, the utility model realizes water pump shell light weight and high strength, thin wall design weight reduction and outer cover reinforcing grid prevents deformation, integral motor seat cooperation double seal, prevents leakage and simplifies assembly, the cross pipe mouth of gradual change drain passage improves hydraulic efficiency and saves space, high integration structure strengthens stability, and water pump service life is greatly prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric water pump housings, and particularly relates to a compact thin-walled housing for an automotive water pump. Background Technology

[0002] As the automotive industry moves towards lightweighting and compactness, the interior space of the engine compartment is becoming increasingly limited, placing higher demands on the size, weight, and ease of assembly of automotive water pumps. As a core load-bearing component, the water pump housing must simultaneously meet multiple requirements regarding structural strength, sealing performance, and lightweighting. However, existing technologies suffer from the following prominent problems: Traditional automotive water pump housings typically employ thick-walled designs to ensure pressure resistance, resulting in heavy components that contradict the trend of energy conservation and emission reduction in the automotive industry. Simply reducing the wall thickness, however, leads to insufficient housing rigidity and susceptibility to deformation, particularly under high-pressure water flow, which can cause seal failure and shorten service life. Some existing technologies attempt to achieve weight reduction by adding a single reinforcing rib, but the strengthening effect is limited and cannot fully cover the circumferential stress area of ​​the chamber.

[0003] The existing water pumps' motor mounting base, chamber shell, inlet and outlet water pipes, and other components are mostly assembled after separate processing. This not only increases the number of parts and assembly complexity, but also reduces the overall structural stability due to connection gaps, affecting the water pump's operating accuracy.

[0004] Therefore, it is essential to invent a compact, thin-walled housing for automotive water pumps. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a compact thin-walled housing for an automotive water pump, including a water pump motor base, a water pump chamber shell, a reinforcing mesh, an end cover shell, a drainage channel, a water inlet, a drain outlet, and an end cover reinforcing plate. The water pump motor base and the water pump chamber shell are integrally formed together. The water pump chamber shell is provided with the reinforcing mesh, and the end cover shell is fixedly installed by bolts. The end cover shell is integrally formed with the drainage channel, the water inlet, and the end cover reinforcing plate. The drainage channel and the drain outlet are integrally connected.

[0006] Preferably, the rear end of the water pump motor base is fixedly mounted with a water pump motor by bolts, and its front end is the water pump chamber shell. The water pump chamber shell and the end cover shell together constitute the water pump chamber.

[0007] Preferably, the thickness of the pump chamber shell and the end cover shell does not exceed ten millimeters, and the outer surface of the pump chamber shell is integrally provided with an outwardly protruding reinforcing mesh.

[0008] Preferably, the reinforcing mesh on the outer surface of the pump chamber shell is a rectangular reinforcing mesh composed of longitudinal and transverse reinforcing strips, and the reinforcing mesh covers the circumferential surface of the pump chamber.

[0009] Preferably, the pump chamber shell is fixedly installed with a sealing gasket on the end face of the end cover shell, and the end cover shell is integrally provided with a water inlet at the center. The end cover reinforcing plate is integrally provided around the water inlet, and the end cover reinforcing plate is arranged around the water inlet.

[0010] Preferably, the drainage channel and water inlet provided on the end cap shell are connected to the water pump chamber, the diameter of the drainage channel is increased, and its largest diameter end is adapted to the drainage inlet, and the axis of the drainage inlet and the axis of the water inlet are intersecting.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This invention significantly reduces the overall weight of the outer shell by controlling the thickness of the water pump chamber shell and end cap shell to within 10 mm, aligning with the trend of lightweight automotive manufacturing. Simultaneously, a rectangular reinforcing grid composed of longitudinal and transverse reinforcing strips is set on the outer surface of the water pump chamber shell, fully covering the circumferential surface of the chamber. Utilizing the synergistic load-bearing effect of the grid structure, the stress generated by the high-pressure water flow is effectively dispersed, preventing deformation of the thin-walled structure. This achieves weight reduction while ensuring the structural rigidity and pressure-bearing capacity of the shell, resolving the contradiction between lightweighting and strength in traditional technologies.

[0012] This utility model adopts an integrated design of the water pump motor base and the water pump chamber shell, reducing the connection gaps and sealing risks of split structures. The end cover shell and the chamber shell are fixed with bolts, and with the sealing gasket embedded in the end face, a double sealing structure is formed, which significantly improves the sealing reliability and effectively avoids fluid leakage under high pressure conditions. At the same time, the integrated structure reduces the number of parts. The end cover shell integrates functional components such as drainage channels and water inlet pipes, eliminating the need for additional piping assembly, simplifying the assembly process, and improving production efficiency.

[0013] This utility model features a drainage channel with a gradually increasing diameter, reducing resistance loss during water flow, minimizing vortex formation and cavitation, and improving the hydraulic efficiency of the water pump. The drainage and inlet pipes are arranged in an axially intersecting configuration, significantly reducing the space occupied by the outer casing compared to traditional coaxial or parallel designs, making it more suitable for compact engine compartment layouts. Furthermore, an inlet pipe is located at the center of the end cap, with reinforcing plates arranged around it to specifically enhance the structural strength of areas with concentrated stress, preventing deformation of the pipe opening due to water flow impact.

[0014] The integrated design of all functional components in this utility model (motor base and chamber shell, drainage channel and drainage port, water inlet and end cover reinforcing plate) reduces connection nodes, improves the integration and stability of the overall structure, and reduces the risk of loosening under long-term vibration; the coordinated design of the reinforced mesh and end cover reinforcing plate makes the shell more evenly stressed, avoids fatigue damage caused by local stress concentration, and significantly extends the service life of the water pump. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0017] In the picture: 1. Pump motor base; 2. Pump chamber shell; 3. Reinforcing mesh; 4. End cover shell; 5. Drainage channel; 6. Inlet pipe; 7. Drainage pipe; 8. End cover reinforcing plate. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0020] As attached Figure 1 To be continued Figure 2 As shown: This utility model provides a compact thin-walled housing for an automotive water pump, comprising a water pump motor base 1, a water pump chamber shell 2, a reinforcing mesh 3, an end cover shell 4, a drainage channel 5, a water inlet 6, a drain outlet 7, and an end cover reinforcing plate 8. The water pump motor base 1 and the water pump chamber shell 2 are integrally formed together. The water pump chamber shell 2 is provided with the reinforcing mesh 3, and the end cover shell 4 is fixedly installed by bolts. The end cover shell 4 is integrally formed with the drainage channel 5, the water inlet 6, and the end cover reinforcing plate 8. The drainage channel 5 and the drain outlet 7 are integrally connected.

[0021] Furthermore, the pump motor base 1 and the pump chamber shell 2 are integrally formed from ADC12 die-cast aluminum alloy. The rear end face of the pump motor base 1 is provided with 3-4 evenly distributed M8-M10 threaded mounting holes, which are fastened to the flange end face of the pump motor by high-strength carbon steel bolts to ensure the connection stability between the motor and the shell. The front end of the pump motor base 1 extends integrally to form the pump chamber shell 2. The front end of the pump chamber shell 2 is a flat annular sealing surface. After being fixed with the mating surface of the end cover shell 4 by bolts, they together form a pump chamber that accommodates the impeller and mechanical seal. The inner wall of the chamber is precision machined with a surface roughness Ra≤1.6μm. The radial clearance with the impeller is controlled at 0.1-0.3mm to avoid interference during operation.

[0022] Furthermore, both the pump chamber shell 2 and the end cover shell 4 are made of glass fiber reinforced PA66 engineering plastic or ADC12 die-cast aluminum alloy, with a shell thickness of 5-10mm (adjusted according to the rated working pressure of the pump 0.3-1.0MPa), achieving lightweight while ensuring the strength of the basic structure; the outer surface of the pump chamber shell 2 is integrally die-cast with the body and has an outwardly protruding reinforcing mesh 3, with an overall protrusion height of 3-5mm, which does not exceed the maximum radial dimension of the pump motor base 1, ensuring the overall compactness of the shell.

[0023] Furthermore, the reinforcing mesh 3 on the outer surface of the pump chamber shell 2 is a rectangular mesh structure formed by the intersection of longitudinal and transverse reinforcing strips. The longitudinal reinforcing strips are arranged along the axial direction of the pump chamber shell 2 and are evenly distributed around the circumference of the chamber. The transverse reinforcing strips are arranged along the circumference of the chamber shell 2 and intersect perpendicularly with the longitudinal reinforcing strips. The cross-section of both the longitudinal and transverse reinforcing strips is rectangular, with a width of 2-3 mm and a thickness consistent with the skin thickness of the chamber shell 2. The side length of the mesh unit is 15-25 mm. The reinforcing mesh 3 completely covers the 360° circumferential surface of the pump chamber. The two ends of the longitudinal reinforcing strips are integrally connected to the front end face of the pump motor base 1 and the front end sealing surface of the chamber shell 2, respectively. The transverse reinforcing strips and all the longitudinal reinforcing strips form a closed-loop stress structure. The transition is designed with R1-R2 rounded corners to avoid stress concentration.

[0024] Furthermore, the pump chamber shell 2 is fixedly connected to the end cover shell 4 by 4-6 circumferentially evenly distributed bolts, which are arranged in a ring array along the front sealing surface of the chamber shell 2; the end face of the end cover shell 4 that fits with the chamber shell 2 is provided with an annular groove, in which a sealing gasket made of nitrile rubber or fluororubber is embedded. The thickness of the sealing gasket is 0.2-0.3 mm greater than the depth of the groove, forming an interference seal after assembly; the center of the end cover shell 4 is integrally formed with the body to form a water inlet 6, the inner diameter of the water inlet 6 is 20-40 mm, and the inner wall of the inlet is provided with 3-5 axial guide ribs; the end cover reinforcing plate 8 located around the water inlet 6 has an arc-shaped structure and is evenly distributed on the outer periphery of the water inlet 6. The inner end of the reinforcing plate 8 is integrally connected to the outer wall of the water inlet 6, and the outer end is integrally connected to the edge of the end cover shell 4. The thickness is the same as the skin thickness of the end cover shell 4, which specifically enhances the connection strength between the water inlet 6 and the end cover shell 4.

[0025] Furthermore, the drainage channel 5 and the water inlet 6 on the end cap 4 are both connected to the water pump chamber. The drainage channel 5 has a gradually expanding diameter structure and is integrally formed with the end cap 4. Its inner diameter at the inlet end (the side closer to the chamber) is the same as the inner diameter of the water inlet 6 (20-40mm), while the inner diameter at the outlet end (the side closer to the drainage pipe 7) is expanded to 24-60mm (i.e., 1.2-1.5 times the original inner diameter). The inner wall of the channel is smooth, and the transition area adopts an R5-R8 rounded corner design to reduce water... Flow resistance; the largest diameter end of the drainage channel 5 is integrally die-cast and connected to the drainage port 7. The drainage port 7 is equipped with a flange with 4 bolt mounting holes for easy connection to the automotive cooling pipes; the axis of the drainage port 7 intersects the axis of the inlet port 6 at a 60°-90° angle, and the drainage port 7 is offset to one side of the end cover 4. The connection between the drainage channel 5 and the water pump chamber is located in the tangential direction of the chamber, guiding the water flow out along the tangent of the chamber and improving drainage efficiency.

[0026] The working principle is as follows: First, the water pump motor is securely installed through the water pump motor base 1. After the motor starts, it drives the impeller in the water pump chamber to rotate synchronously, providing a power source for the delivery of coolant.

[0027] Under the suction force generated by the impeller rotation, the coolant enters the water pump chamber through the water inlet 6 in the center of the end cover 4. The axial guide ribs of the water inlet 6 guide the water flow to form a stable flow state, avoiding turbulence when entering the chamber.

[0028] The centrifugal force generated by the impeller rotation accelerates and pressurizes the coolant in the chamber. The water pump chamber shell 2 and the end cover shell 4 together form a sealed space to ensure the stable flow of coolant under high pressure. At the same time, the reinforcing mesh 3 outside the water pump chamber shell 2 resists the chamber deformation caused by high pressure through the overall stress structure and maintains the stability of the chamber shape.

[0029] The closed-loop structure formed by the longitudinal and transverse reinforcing strips of the reinforced grid 3 evenly distributes the stress generated by the high pressure in the chamber to the entire surface of the pump chamber shell 2. The rounded corner design at the transition avoids local stress concentration and ensures that the structure does not suffer fatigue damage under long-term high-pressure conditions.

[0030] The sealing gasket between the end cover shell 4 and the water pump chamber shell 2 achieves a tight seal through an interference fit, preventing high-pressure coolant from leaking from the mating surface. At the same time, the end cover reinforcing plate 8 strengthens the connection between the water inlet 6 and the end cover shell 4, resisting the local deformation caused by the impact force when water flows in.

[0031] The pressurized coolant enters the drain channel 5 on the end cover 4 along the tangential direction of the water pump chamber. The gradually expanding channel structure allows the water flow to gradually depressurize and accelerate during transportation. The smooth inner wall and rounded corners reduce water flow resistance and avoid vortex formation and cavitation. Subsequently, the coolant is guided through the drain channel 5 to the drain pipe 7. The drain pipe 7 is connected to the vehicle's cooling pipes through a flange. The cross-arranged axis design adapts to the engine compartment space layout and finally delivers the coolant to the engine cooling system to complete the circulating cooling.

[0032] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A compact, thin-walled housing for an automotive water pump, characterized in that, The device includes a water pump motor base (1), a water pump chamber shell (2), a reinforcing mesh (3), an end cap shell (4), a drainage channel (5), a water inlet (6), a drain outlet (7), and an end cap reinforcing plate (8). The water pump motor base (1) and the water pump chamber shell (2) are integrally arranged together. The water pump chamber shell (2) is provided with the reinforcing mesh (3), and the end cap shell (4) is fixedly installed by bolts. The end cap shell (4) is integrally provided with the drainage channel (5), the water inlet (6), and the end cap reinforcing plate (8). The drainage channel (5) and the drain outlet (7) are integrally connected.

2. The compact automotive water pump thin-walled housing as described in claim 1, characterized in that: The pump motor is fixedly installed at the rear end of the pump motor base (1) by bolts, and its front end is the pump chamber shell (2). The pump chamber shell (2) and the end cover shell (4) together constitute the pump chamber.

3. The compact automotive water pump thin-walled housing as described in claim 2, characterized in that: The thickness of the pump chamber shell (2) and the end cover shell (4) shall not exceed ten millimeters, and the outer surface of the pump chamber shell (2) shall be integrally provided with an outwardly protruding reinforcing mesh (3).

4. The compact automotive water pump thin-walled housing as described in claim 3, characterized in that: The reinforcing mesh (3) on the outer surface of the pump chamber shell (2) is a rectangular reinforcing mesh composed of longitudinal reinforcing strips and transverse reinforcing strips. The reinforcing mesh (3) covers the circumferential surface of the pump chamber.

5. The compact automotive water pump thin-walled housing as described in claim 4, characterized in that: The pump chamber shell (2) is fixedly installed with bolts. The end cover shell (4) is fitted with a sealing gasket. The end cover shell (4) is integrally provided with a water inlet (6) in the center. The end cover reinforcing plate (8) is integrally provided around the water inlet (6). The end cover reinforcing plate (8) is arranged around the water inlet (6).

6. The compact automotive water pump thin-walled housing as described in claim 5, characterized in that: The drainage channel (5) and water inlet (6) provided on the end cap shell (4) are connected to the water pump chamber. The diameter of the drainage channel (5) is increased, and its largest diameter end is adapted to the drainage pipe (7). The axis of the drainage pipe (7) and the axis of the water inlet (6) are intersecting.

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