Coolant pump

Abstract

The utility model discloses a cooling liquid pump, including main part and cover, the cover cover is established on the main part longitudinal end, be provided with coolant inlet and tangential coolant outlet on the cover, the main part longitudinal end is along the periphery and is provided with the positioning flange, the cover inner peripheral wall is along the periphery and is provided with the positioning step in the corresponding positioning flange position, the positioning flange is resisted and touches on the positioning step, the outer peripheral wall of main part still is provided with the baffle, be provided with interval groove between the baffle and positioning flange, the cover is provided with fastening hole in the corresponding interval groove position, the fastening screw is cooperated in the fastening hole, the fastening screw is inserted and is established in interval groove and is cooperated with the main part screw thread. Its simple structure, the cover and the connection of main part structure are convenient and reliable, have good stability and use effect.

Description

Technical Field

[0001] This utility model relates to a coolant pump. Background Technology

[0002] Automotive coolant pump manufacturers typically supply coolant pumps to many different internal combustion engine or automobile manufacturers. Centrifugal pumps have become the standard pump type, featuring an axial coolant inlet and a tangential coolant outlet. Existing coolant pump housings mainly consist of a cylindrical metal body structure and a cover mounted on the longitudinal end of the body. The cover has the coolant inlet and tangential coolant outlet. The connection between the existing cover and the body uses a snap ring structure, relying on the snap ring's deformation and precise matching with the slot. Even a small deviation can lead to installation that is too loose or too tight, and the snap ring is prone to popping out during installation, affecting efficiency, posing safety hazards, and hindering production efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a coolant pump with a simple structure, convenient and reliable connection between the cover and the main structure, and good stability and performance.

[0004] To achieve the above objectives, this utility model provides a coolant pump, including a main body and a cover. The cover is disposed on the longitudinal end of the main body, and the cover is provided with a coolant inlet and a tangential coolant outlet. A positioning flange is provided circumferentially on the longitudinal end of the main body. A positioning step is provided circumferentially on the inner peripheral wall of the cover corresponding to the position of the positioning flange. The positioning flange abuts against the positioning step. A retaining edge is also provided on the outer peripheral wall of the main body. A gap groove is provided between the retaining edge and the positioning flange. A fastening hole is provided on the cover corresponding to the position of the gap groove. A fastening screw is fitted in the fastening hole. The fastening screw is inserted into the gap groove and engages with the thread of the main body.

[0005] The advantages of this design are as follows: The positioning flange of the main body and the positioning step of the cover form a precise circumferential positioning. During assembly, simply aligning the two together quickly determines the installation position, eliminating the need for repeated dimensional adjustments and significantly simplifying the initial positioning process. Furthermore, the gap formed by the flange and the positioning flange provides clear installation space for the fastening screws. The screws pass directly through the fastening holes in the cover and engage with the threads of the main body. Only a general-purpose wrench is needed for fixing. The threaded connection of the fastening screws provides continuous and stable axial preload, preventing fatigue of the retaining spring during pump operation. This design significantly improves connection reliability by addressing the issue of loosening. The fit between the positioning flange and the step not only enables rapid positioning but also limits the radial movement of the cover. Combined with the axial fixation of the screws, it forms a "two-way limit," effectively offsetting the radial impact force generated by the coolant flow, reducing vibration interference within the flow channel, and indirectly improving the flow stability of the pump body. This structure has a higher tolerance for component dimensional tolerances, reducing the rate of machining scrap. Furthermore, during subsequent disassembly, only the screws need to be removed, eliminating concerns about issues such as broken snap rings, rust, or adhesion. This reduces maintenance difficulty and component wear costs, while also being compatible with dimensional adjustments for different pump models.

[0006] As a further feature of this utility model, the longitudinal end edge of the main body is provided with an abutting flange along the circumferential direction, and the inner peripheral wall of the cover is provided with an abutting step corresponding to the position of the abutting flange, and the abutting flange abuts against the abutting step.

[0007] The beneficial effects of this design are as follows: With the positioning flange providing circumferential positioning, and the abutment flange positioned circumferentially along the longitudinal edge of the main body, a clear mechanical feedback is generated when the abutment flange fully contacts the abutment step. Workers can visually determine whether the cover is properly installed. The full circumferential contact between the abutment flange and the step effectively disperses the radial impact force on the cover, preventing wear on the inner circumferential wall of the cover caused by localized stress concentration. Simultaneously, the radial limiting of the positioning flange and the axial fixing of the screws work together to construct a multi-dimensional stable structure, even in the pump... Even under high-frequency vibration conditions, it can limit the slight movement of the cover; at the same time, the gap formed between the contact flange structure and the positioning protrusion structure can accommodate the sealing structure; the size of this gap can be precisely adapted to commonly used sealing components such as O-rings and gaskets. The sealing component is stably accommodated in the gap, which not only avoids the displacement or falling off of the sealing component during assembly, but also allows the sealing component to be uniformly deformed under the combined action of the contact pressure between the contact flange and the step and the pre-tightening force of the screw, forming a complete annular sealing surface, completely blocking the leakage of coolant from the mating gap between the cover and the main body.

[0008] As a further feature of this invention, a baffle is provided along the edge of the cover, and the baffle corresponds to the position of the baffle on the main body.

[0009] The beneficial effects of this design are as follows: With the baffle wall along the edge of the cover corresponding to the main body's baffle edge, a secondary sealing barrier is formed. When the two are in contact, they fill any tiny gaps that may exist between the cover and the main sealing structure, preventing coolant from seeping out from the circumferential gaps and further enhancing overall airtightness. The baffle wall and the baffle edge support each other, reducing cover deformation during pump vibration and preventing misalignment of the sealing surfaces.

[0010] As a further feature of this invention, a positioning protrusion is provided on the positioning flange along the radial direction of the main body, and the head of the fastening screw abuts against the positioning protrusion.

[0011] The advantages of this design are as follows: The positioning protrusion on the positioning flange abuts against the head of the fastening screw, creating a precise mechanical stop. This directly limits the screw's screw insertion depth, preventing over-screwing that could damage the main thread structure or cause deformation of the cover due to excessive pressure, thus ensuring the integrity of the parts. This design ensures consistent screw preload during batch assembly, preventing vibration-induced loosening caused by differences in tightness. Simultaneously, it indirectly protects the seal between the flange and the step, preventing deformation and failure due to over-screwing and maintaining seal reliability. Furthermore, the protrusion assists in screw alignment, reducing alignment difficulty during assembly and improving operational efficiency.

[0012] As a further feature of this utility model, a mating boss is provided on the outer wall of the main body, and a mating groove is provided on the cover corresponding to the mating boss, wherein the mating boss and the mating groove are inserted into each other.

[0013] The beneficial effects of this design are: with this design, the interlocking fit between the outer wall of the main body and the groove of the cover can form a dual preliminary positioning in both the radial and circumferential directions. During assembly, there is no need to repeatedly calibrate the relative position of the cover and the main body, and alignment can be completed quickly, greatly simplifying the positioning process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of the first embodiment of the present utility model; Figure 3 This is the first embodiment of the present utility model. Figure 2 Enlarged view of part A in the middle; Figure 4 This is a cross-sectional view of the positions of the positioning flange and the positioning step in the second embodiment of this utility model; Figure 5 This is a cross-sectional view of the positioning flange and positioning step positions in the third embodiment of this utility model. Detailed Implementation

[0015] This utility model provides a first embodiment of a coolant pump, such as Figures 1 to 3As shown, the device includes a main body 1 and a cover 2. The cover 2 is placed on the longitudinal end of the main body 1. The cover 2 is provided with a coolant inlet and a tangential coolant outlet. The longitudinal end of the main body 1 is provided with a positioning flange 12 along the circumferential direction. The inner circumferential wall of the cover 2 is provided with a positioning step 21 along the circumferential direction corresponding to the position of the positioning flange 12. The positioning flange 12 abuts against the positioning step 21. The outer circumferential wall of the main body 1 is also provided with a retaining edge 13. A gap groove is provided between the retaining edge 13 and the positioning flange 12. The cover 2 is provided with a fastening hole corresponding to the position of the gap groove. A fastening screw 3 is fitted in the fastening hole. The fastening screw 3 is inserted into the gap groove and threadedly engaged with the main body 1. The advantages of this design are as follows: With this design, the positioning flange 12 of the main body 1 and the positioning step 21 of the cover 2 form a precise circumferential positioning. During assembly, simply aligning the two together allows for quick determination of the installation position, eliminating the need for repeated dimensional adjustments and significantly simplifying the initial positioning process. Furthermore, the gap formed by the flange 13 and the positioning flange 12 provides a clear installation space for the fastening screw 3. The screw passes directly through the fastening hole of the cover 2 and engages with the threaded connection of the main body 1. Only a general-purpose wrench is needed for fixing. The threaded connection of the fastening screw 3 provides a continuous and stable axial preload, preventing the pump body from catching due to spring clipping during operation. The loosening problem caused by elastic fatigue is significantly improved, enhancing connection reliability. The engagement of the positioning flange 12 and the step not only enables rapid positioning but also restricts the radial movement of the cover 2. Combined with the axial fixation of the screws, it forms a "bidirectional limit," effectively offsetting the radial impact force generated by the coolant flow, reducing vibration interference in the flow channel, and indirectly improving the flow stability of the pump body. This structure has a higher tolerance for part dimensional tolerances, reducing the rate of machining scrap. Furthermore, during subsequent disassembly, only the screws need to be removed, eliminating concerns about issues such as broken snap rings, rust, and adhesion. This reduces maintenance difficulty and part wear costs, while also being compatible with dimensional adjustments for different pump models.

[0016] As a further provision of this embodiment, an abutting flange 14 is provided circumferentially along the longitudinal end edge of the main body 1, and an abutting step 22 is provided on the inner peripheral wall of the cover 2 corresponding to the position of the abutting flange 14. The abutting flange 14 abuts against the abutting step 22. The beneficial effects of this configuration are: with the positioning flange 12 providing circumferential positioning, and the abutting flange 14 being circumferentially positioned along the longitudinal end edge of the main body 1, when the abutting flange 14 and the abutting step 22 are fully abutted, a clear mechanical feedback is generated, allowing workers to visually determine whether the cover 2 is installed correctly. The full circumferential contact between the abutting flange 14 and the step effectively disperses the radial impact force on the cover 2, avoiding wear on the inner peripheral wall of the cover 2 caused by local stress concentration; simultaneously, in conjunction with the radial limiting of the positioning flange 12 and the axial fixing of the screw, the three together construct a multi-dimensional stable structure, i.e. Even under high-frequency vibration conditions of the pump body, it can limit the slight movement of the cover 2; at the same time, the gap formed between the contact flange 14 structure and the positioning protrusion 121 structure can accommodate the sealing structure; the size of this gap can be precisely adapted to commonly used sealing components such as O-rings and gaskets, and the sealing component is stably accommodated in the gap, which not only avoids the displacement or falling off of the sealing component during assembly, but also allows the sealing component to be uniformly deformed under the combined action of the contact pressure of the contact flange 14 and the step and the pre-tightening force of the screw, forming a complete annular sealing surface, which completely blocks the leakage of coolant from the mating gap between the cover 2 and the main body 1.

[0017] As a further feature of this embodiment, a baffle is provided along the edge of the cover 2, and the baffle corresponds to the position of the baffle 13 on the main body 1. The beneficial effect of this arrangement is that the baffle along the edge of the cover 2 and the baffle 13 on the main body 1, corresponding to each other, form a secondary sealing barrier. When they are in contact, they can fill any small gaps that may exist between the cover 2 and the main sealing structure of the main body 1, preventing coolant from seeping out from the circumferential gaps and further enhancing the overall airtightness. The baffle and the baffle 13 support each other, reducing the deformation of the cover 2 when the pump body vibrates and preventing misalignment of the sealing surfaces.

[0018] As a further feature of this embodiment, a mating boss 11 is provided on the outer wall of the main body 1, and a mating groove 23 is provided on the cover 2 corresponding to the mating boss 11. The mating boss 11 and the mating groove 23 are inserted into each other. The beneficial effect of this configuration is that the insertion and engagement of the mating boss 11 on the outer wall of the main body 1 and the mating groove of the cover 2 can form a dual preliminary positioning in both the radial and circumferential directions. During assembly, there is no need to repeatedly calibrate the relative position of the cover 2 and the main body 1, which can quickly complete the alignment and greatly simplify the positioning process.

[0019] This utility model provides a second embodiment of a coolant pump, such as... Figure 4The image shows a cross-sectional view of the positioning flange and positioning step in this embodiment. In this embodiment, a positioning protrusion 121 is provided on the positioning flange 12 along the radial direction of the main body 1, and the head of the fastening screw 3 abuts against the positioning protrusion 121. The beneficial effects of this design are: the positioning protrusion 121 on the positioning flange 12 abuts against the head of the fastening screw 3, forming a precise mechanical stop, directly limiting the screw's screw insertion depth, avoiding excessive screwing that could damage the thread structure of the main body 1, or causing deformation of the cover 2 due to overpressure, thus ensuring the integrity of the parts. This design can ensure consistent screw preload during batch assembly, avoiding vibration and loosening caused by differences in tightness; at the same time, it can indirectly protect the seal between the flange and the step, preventing deformation and failure of the seal due to over-tightening and compression, maintaining sealing reliability; and the protrusion can assist in screw alignment, reducing the difficulty of alignment during assembly and improving operational efficiency.

[0020] This utility model provides a third embodiment of a coolant pump, such as... Figure 5 The diagram shows a cross-sectional view of the positioning flange and positioning step in this embodiment, including a main body 1 and a cover 2. The cover 2 is placed on the longitudinal end of the main body 1. The cover 2 is provided with a coolant inlet and a tangential coolant outlet. A positioning flange 12 is provided circumferentially on the longitudinal end of the main body 1. A positioning step 21 is provided circumferentially on the inner peripheral wall of the cover 2 corresponding to the position of the positioning flange 12. The positioning flange 12 abuts against the positioning step 21. A retaining edge 13 is also provided on the outer peripheral wall of the main body 1. A gap groove is provided between the retaining edge 13 and the positioning flange 12. A fastening hole is provided on the cover 2 corresponding to the position of the gap groove. A fastening screw 3 is fitted in the fastening hole. The fastening screw 3 is inserted into the gap groove and threadedly engaged with the main body 1. The advantages of this design are as follows: With this design, the positioning flange 12 of the main body 1 and the positioning step 21 of the cover 2 form a precise circumferential positioning. During assembly, simply aligning the two together allows for quick determination of the installation position, eliminating the need for repeated dimensional adjustments and significantly simplifying the initial positioning process. Furthermore, the gap formed by the flange 13 and the positioning flange 12 provides a clear installation space for the fastening screw 3. The screw passes directly through the fastening hole of the cover 2 and engages with the threaded connection of the main body 1. Only a general-purpose wrench is needed for fixing. The threaded connection of the fastening screw 3 provides a continuous and stable axial preload, preventing the pump body from catching due to spring clipping during operation. The loosening problem caused by elastic fatigue is significantly improved, enhancing connection reliability. The engagement of the positioning flange 12 and the step not only enables rapid positioning but also restricts the radial movement of the cover 2. Combined with the axial fixation of the screws, it forms a "bidirectional limit," effectively offsetting the radial impact force generated by the coolant flow, reducing vibration interference in the flow channel, and indirectly improving the flow stability of the pump body. This structure has a higher tolerance for part dimensional tolerances, reducing the rate of machining scrap. Furthermore, during subsequent disassembly, only the screws need to be removed, eliminating concerns about issues such as broken snap rings, rust, and adhesion. This reduces maintenance difficulty and part wear costs, while also being compatible with dimensional adjustments for different pump models.

[0021] As a further feature of this embodiment, a mating boss 11 is provided on the outer wall of the main body 1, and a mating groove 23 is provided on the cover 2 corresponding to the mating boss 11. The mating boss 11 and the mating groove 23 are inserted into each other. The beneficial effect of this configuration is that the insertion and engagement of the mating boss 11 on the outer wall of the main body 1 and the mating groove of the cover 2 can form a dual preliminary positioning in both the radial and circumferential directions. During assembly, there is no need to repeatedly calibrate the relative position of the cover 2 and the main body 1, which can quickly complete the alignment and greatly simplify the positioning process.

[0022] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.

Claims

1. A coolant pump, comprising a body and a cover, the cover being disposed on the longitudinal end of the body, the cover having a coolant inlet and a tangential coolant outlet, characterized in that: The main body has a positioning flange along its longitudinal end in the circumferential direction. The inner circumferential wall of the cover has a positioning step along its circumferential direction corresponding to the positioning flange. The positioning flange abuts against the positioning step. The outer circumferential wall of the main body also has a retaining edge. A gap groove is provided between the retaining edge and the positioning flange. A fastening hole is provided on the cover corresponding to the gap groove. A fastening screw is fitted in the fastening hole. The fastening screw is inserted into the gap groove and engages with the thread of the main body.

2. The coolant pump according to claim 1, characterized in that: The main body has a contact flange along its longitudinal end edge in the circumferential direction, and the cover has a contact step on the inner circumferential wall corresponding to the contact flange position, and the contact flange abuts against the contact step.

3. The coolant pump according to claim 2, characterized in that: The cover edge is provided with a baffle, and the baffle is positioned corresponding to the baffle on the main body.

4. The coolant pump according to claim 1, characterized in that: The positioning flange has a positioning protrusion along the radial direction of the main body, and the head of the fastening screw abuts against the positioning protrusion.

5. The coolant pump according to claim 1, characterized in that: The outer wall of the main body is provided with a mating boss, and the cover is provided with a mating groove corresponding to the mating boss. The mating boss and the mating groove are inserted and mated.

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