A connecting structure of an electronic water pump for vehicle

Abstract

The utility model relates to a kind of connecting structure of electronic water pump for vehicle, it includes pump head, pump body and elastic collar;Pump head is equipped with pump head collar groove, bevel chamfer, positioning column and pump head dismounting groove;Pump body is equipped with pump body collar groove and positioning hole;Collar opening both sides are equipped with collar dismounting hole;Pump head dismounting groove is located in pump head bottom and is the slot with opening downward, simultaneously the opening of the collar and two collar dismounting holes are located in pump head dismounting groove;Collar can be prepositioned in pump body collar groove, and after shrinking along bevel chamfer when pump head is pressed in, it is bounced into pump head collar groove, realize axial fixation by being clamped in pump head collar groove and pump body collar groove simultaneously;Positioning column and positioning hole cooperate to realize radial positioning.The utility model is put into small equipment, greatly improves production rhythm, and it is convenient to disassemble and repair, effectively reduces manufacturing cost and maintenance cost, improves product market competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of electronic water pump technology, specifically a connection structure for an automotive electronic water pump. Background Technology

[0002] Whether as a key cooling device in automotive thermal management systems or a core cooling device in energy storage systems, the development of the new energy industry is putting increasing pressure on the cost of electronic water pumps. Manufacturing cost is a significant component of the total cost of electronic water pumps, and the structural design of the connection between the pump head and the pump body directly affects the equipment investment, installation efficiency, and maintenance costs during the assembly of the electronic water pump.

[0003] Currently, common electronic water pump head and pump body connection structures use bolt connection, ultrasonic connection, friction welding connection, laser welding connection and other methods;

[0004] Bolted connections: low equipment investment cost; simple installation; easy disassembly, analysis and repair of defective parts; however, electronic water pump heads and pump bodies generally use 4 or more bolts; this has a significant impact on production cycle time and indirectly affects manufacturing costs.

[0005] While ultrasonic welding, friction welding, and laser welding offer fast assembly speeds, they come with high equipment costs and the inability to disassemble the connected parts after connection makes it impossible to repair defective components, leading to high costs for problem analysis and further increasing overall costs.

[0006] In summary, existing connection methods for electronic water pump heads and bodies cannot simultaneously meet the requirements of low equipment investment, fast production cycle, convenient installation, and convenient maintenance. Therefore, there is an urgent need to design an innovative connection structure for electronic water pump heads and bodies to simultaneously meet the requirements of low equipment investment, fast production cycle, convenient installation, and convenient maintenance. Utility Model Content

[0007] To address the aforementioned problems, this utility model provides a connection structure for an automotive electronic water pump that reduces production costs and facilitates disassembly and maintenance.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a connection structure for an automotive electronic water pump, including a pump head, a pump body, and an elastic retaining ring; the pump head is provided with a pump head retaining ring groove, a chamfer, a positioning post, and a pump head disassembly groove; the pump body is provided with a pump body retaining ring groove and a positioning hole; the retaining ring opening is provided on both sides of the retaining ring opening; the pump head disassembly groove is located at the bottom of the pump head and is a downward-facing groove, while the opening of the retaining ring and the two retaining ring disassembly holes are both located within the pump head disassembly groove; the retaining ring can be pre-placed in the pump body retaining ring groove, and when the pump head is pressed in, it retracts along the chamfer and springs into the pump head retaining ring groove, achieving axial fixation by simultaneously clamping in the pump head retaining ring groove and the pump body retaining ring groove; the positioning post cooperates with the positioning hole to achieve radial positioning.

[0009] Preferably, the pump body retaining ring groove has a movable space for the retaining ring to fully retract into the pump body retaining ring groove.

[0010] Preferably, the chamfer is set at the bottom edge of the pump head and is inclined inward toward the center line of the pump head along the circumference. At the same time, when the pump head is pressed into the pump body, the inner edge of the chamfer can fit against the outer edge of the pump body retaining ring groove, so that the retaining ring is fully compressed into the pump body retaining ring groove.

[0011] Preferably, the width and depth of the pump head disassembly groove are suitable for exposing the retaining ring disassembly hole and avoiding the operation of the retaining ring disassembly tool.

[0012] Preferably, the retaining ring removal tool is a retaining ring pliers.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model can complete the connection by using an elastic retaining ring that is pre-placed and then pressed in once. The cycle time is much faster than bolt connection and welding, which improves production efficiency. At the same time, it eliminates the need for expensive welding equipment or multiple bolt fastening equipment, thus significantly reducing expenses.

[0015] 2. This utility model can achieve non-destructive disassembly of the retaining ring by using ordinary retaining ring pliers, which facilitates fault analysis, component replacement and repair, and reduces scrap rate and maintenance cost;

[0016] 3. This utility model achieves axial fixation through a bidirectional retaining ring groove (i.e., a retaining ring groove in the pump head and a retaining ring groove in the pump body), and achieves radial positioning by combining a positioning post and a positioning hole, resulting in a stable connection and good sealing performance;

[0017] 4. This utility model can be widely applied to various electronic water pump products, and is especially suitable for cost-sensitive applications in new energy vehicles and energy storage systems. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the connection structure between the pump head and the pump body of this utility model;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a schematic diagram of the pump head structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the pump body structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the retaining ring structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the pump head and pump body after installation.

[0024] Figure 7 yes Figure 6 Enlarged diagram of point C in the middle. Detailed Implementation

[0025] The following will combine Figure 1-7 The present invention will be described in detail below. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0026] A connection structure for an automotive electronic water pump includes a pump head 1, a pump body 5, and an elastic retaining ring 2. The pump head has a retaining ring groove 3, a chamfer 4, a positioning post 7, and a pump head removal groove 10. The pump body has a retaining ring groove 6 and a positioning hole 8. Removal holes 9 are provided on both sides of the retaining ring opening. The pump head removal groove is located at the bottom of the pump head and is a downward-facing groove. The opening of the retaining ring and the two removal holes are both located within the pump head removal groove. The retaining ring can be pre-placed in the retaining ring groove of the pump body and, when the pump head is pressed in, retracts along the chamfer and springs into the retaining ring groove of the pump head. Axial fixation is achieved by simultaneously clamping it in the retaining ring groove of the pump head and the retaining ring groove of the pump body. The inner diameter of the retaining ring ensures that it can fit into the retaining ring groove of the pump body, preventing the retaining ring from falling off. At the same time, the outer diameter of the retaining ring is larger than the diameter of the root of the retaining ring groove of the pump head (i.e., the circumferential diameter of the inner wall of the retaining ring groove of the pump head) to achieve the connection effect after installation. The positioning post cooperates with the positioning hole to achieve radial positioning.

[0027] Furthermore, the pump body retaining ring groove has a movable space for the retaining ring to fully retract into the pump body retaining ring groove, preparing for subsequent assembly; the chamfer is set at the bottom edge of the pump head and is inclined inward towards the center line of the pump head along the circumference. At the same time, when the pump head is pressed into the pump body, the inner edge of the chamfer can fit against the outer edge of the pump body retaining ring groove, so that the retaining ring is fully compressed into the pump body retaining ring groove.

[0028] Furthermore, the width and depth of the pump head removal groove are suitable for exposing the retaining ring removal hole while avoiding the operation of the retaining ring removal tool. Specifically, the retaining ring removal tool is a retaining ring pliers.

[0029] During the implementation process, a pre-installation operation is performed during assembly, in which the elastic retaining ring is placed in advance and installed in the retaining ring groove of the pump body.

[0030] Next, align the pump head with the pump body and install it vertically. As the pump head is pressed down vertically, its pre-set chamfer will contact the retaining ring in the retaining ring groove of the pump body. Because the chamfer is angled inward from the bottom edge of the pump head towards the center line, under the continuous downward pressure, the chamfer will exert radial compressive force on the retaining ring, forcing it to undergo elastic deformation and gradually shrink in diameter.

[0031] Subsequently, the pump head continues to move vertically downwards. When the pump head retaining ring groove on the pump head moves to correspond with the retaining ring position, the compressive force of the chamfer on the retaining ring disappears. At this moment, the retaining ring quickly springs open under its own elasticity, its diameter recovers and increases, and then simultaneously embeds into the pump head retaining ring groove and the pump body retaining ring groove. Through the cooperation of the retaining ring and the double grooves, the pump head and pump body are axially connected and fixed, restricting their relative movement in the axial direction. Furthermore, when the pump head and pump body are axially connected and fixed, the positioning pin of the pump head and the positioning hole of the pump body will interlock, thereby completing the radial positioning of the pump head and pump body.

[0032] During disassembly, after the pump head and pump body are installed, the two retaining ring removal holes on the retaining ring will be aligned with the pump head removal groove on the pump head by the positioning tool. Since the width of the pump head removal groove can fully expose the two retaining ring removal holes, and the groove depth is sufficient to avoid the retaining ring pliers, ample operating space is provided for the disassembly operation.

[0033] The operator inserts the two jaws of a standard snap ring pliers into the two snap ring removal holes of the snap ring, and then clamps the snap ring pliers. When the snap ring pliers clamp, a radial tensile force is applied to the snap ring removal holes, causing the snap ring to undergo elastic deformation, resulting in a gradual reduction in the diameter of the snap ring.

[0034] When the diameter of the retaining ring shrinks to a size smaller than the connection dimension of the retaining ring groove in the pump head, the fit between the retaining ring and the retaining ring groove in the pump head is released, and the retaining ring remains only in the retaining ring groove in the pump body. At this point, the operator can manually remove the pump head upwards, separating the pump head from the pump body and completing the disassembly process. If the disassembled retaining ring is undamaged, it can be reused in subsequent installation operations, further reducing the cost of component wear. Simultaneously, disassembly allows for timely repair of other damaged parts.

[0035] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A connection structure for an automotive electronic water pump, characterized in that: The pump head includes a pump head (1), a pump body (5), and an elastic retaining ring (2). The pump head is provided with a pump head retaining ring groove (3), a chamfer (4), a positioning post (7), and a pump head disassembly groove (10). The pump body is provided with a pump body retaining ring groove (6) and a positioning hole (8). The retaining ring opening is provided with retaining ring disassembly holes (9) on both sides. The pump head disassembly groove is located at the bottom of the pump head and is a groove with the opening facing downwards. At the same time, the opening of the retaining ring and the two retaining ring disassembly holes are located in the pump head disassembly groove. The retaining ring can be pre-placed in the pump body retaining ring groove and, when the pump head is pressed in, shrinks along the chamfer and springs into the pump head retaining ring groove. Axial fixation is achieved by simultaneously clamping it in the pump head retaining ring groove and the pump body retaining ring groove. The positioning post cooperates with the positioning hole to achieve radial positioning.

2. The connection structure of the vehicle electronic water pump according to claim 1, characterized in that: The pump body retaining ring groove has a movable space for the retaining ring to fully retract into the pump body retaining ring groove.

3. The connection structure of the vehicle electronic water pump according to claim 1, characterized in that: The chamfer is set at the bottom edge of the pump head and is inclined inward toward the center line of the pump head along the circumference. At the same time, when the pump head is pressed into the pump body, the inner edge of the chamfer can fit against the outer edge of the pump body retaining ring groove, so that the retaining ring is fully compressed into the pump body retaining ring groove.

4. The connection structure of the vehicle electronic water pump according to claim 1, characterized in that: The width and depth of the pump head disassembly groove are suitable for exposing the retaining ring disassembly hole while avoiding the operation of the retaining ring disassembly tool.

5. The connection structure of the vehicle electronic water pump according to claim 4, characterized in that: The tool for removing the retaining ring is a retaining ring pliers.

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