Wire harness fixing structure of electronic water pump

Abstract

The utility model discloses a wire harness fixing structure of an electronic water pump. The electronic water pump comprises a pump shell structural body and a driving circuit board. A wiring harness fixing seat is arranged at the pump shell structural body and penetrates through the inner side and the outer side of the pump shell structural body; the driving circuit board is accommodated in the pump shell structural body; a wire harness is led out of the driving circuit board, and the free end of the wire harness penetrates through a wire harness fixing seat of the pump shell structure body and is led out of the pump shell structure body; a sealing plug component is arranged in a wire harness fixing seat of the pump shell structural body, and the sealing plug component is used for plugging a gap between the wire harness and the wire harness fixing seat. The wiring harness fixing structure mainly solves the problem of how to provide a reliable and good-stability wiring harness fixing structure for the electronic water pump. The waterproof sealing performance requirement of the electronic water pump at the wire outlet position is met, the wire harness can be prevented from being excessively pulled or excessively swinging, the operation stability of the electronic water pump is improved, and the service life of the electronic water pump is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic water pumps and their components, specifically to a wiring harness fixing structure for an electronic water pump. Background Technology

[0002] Electric water pumps have high output efficiency and can achieve precise flow control. Therefore, they are widely used in automobiles, home appliances and industrial equipment. For example, new energy vehicles are usually equipped with two or more electric water pumps as the power source for the entire cooling system.

[0003] The drive circuit board is one of the core components of an electronic water pump. It can receive electrical energy and / or control signals from the outside and supply a current of a specific waveform to the stator assembly of the electronic water pump to drive the stator assembly to generate a rotating magnetic field, which in turn magnetically drives the rotor-impeller assembly of the electronic water pump to rotate, thus realizing the basic function of the electronic water pump.

[0004] Obviously, the aforementioned drive circuit board needs to rely on wiring harnesses and connectors to receive power and / or control signals from the outside.

[0005] In the prior art, based on the user requirements of electronic water pumps, some electronic water pumps are equipped with a wiring harness with a connector. Specifically, the fixed end of the wiring harness is soldered to the drive circuit board, and the free end of the wiring harness is led out from the housing of the electronic water pump and is equipped with a connector at its end.

[0006] The wiring harness of the above-mentioned electronic water pump is usually flexible. During the use of the electronic water pump, the wiring harness may be pulled or swing, which may cause the sealing of the mating position between the electronic water pump housing and the wiring harness to fail, and may also cause the wiring harness to desolder, affecting the operational stability and service life of the electronic water pump.

[0007] In conclusion, providing a reliable and stable wiring harness fixing structure for electronic water pumps has become one of the urgent problems to be solved. Utility Model Content

[0008] The purpose of this utility model is to provide a wiring harness fixing structure for an electronic water pump, which can provide a reliable and stable wiring harness fixing structure for the electronic water pump.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a wire harness fixing structure for an electronic water pump, applied to an electronic water pump; the electronic water pump includes at least a pump housing structure and a drive circuit board; a wire harness fixing seat is disposed at the pump housing structure, and the wire harness fixing seat penetrates the inner and outer sides of the pump housing structure; the drive circuit board is housed within the pump housing structure; a wire harness is led out from the drive circuit board, and the free end of the wire harness passes through the wire harness fixing seat of the pump housing structure and is led out outside the pump housing structure; a sealing plug component is disposed in the wire harness fixing seat of the pump housing structure, and the sealing plug component is used to seal the gap between the wire harness and the wire harness fixing seat.

[0010] In the above technical solution, the pump housing structure includes a pump housing component and an end cover component; the wire harness fixing seat is fixed / integratedly formed on the end cover component; the drive circuit board is housed in the pump housing component; the end cover component covers the opening of the pump housing component and shields the drive circuit board.

[0011] In the above technical solution, a plurality of first wire harness holes are provided at the sealing plug component; the wire harness passes through each of the first wire harness holes of the sealing plug component.

[0012] In the above technical solution, the first wire harness hole of the sealing plug component has an inner annular rib formed on its inner wall; the wire harness is interference-fitted with the inner annular rib of the sealing plug component; an outer annular rib is formed on the surface of the sealing plug component; the outer annular rib of the sealing plug component is interference-fitted with the inner wall of the wire harness fixing seat of the pump housing structure.

[0013] In the above technical solution, at least one first wire harness hole of the sealing plug component is a blind hole that can be punctured.

[0014] In the above technical solution, the inner wall of the wire harness fixing seat of the pump housing structure is narrowed at one end near the inner side of the pump housing structure to form a stop rib; one end of the sealing plug member is formed with a narrowed head; the narrowed head of the sealing plug member is connected to the stop rib of the wire harness fixing seat of the pump housing structure.

[0015] In the above technical solution, on the inner side of the pump housing structure, near the wire harness fixing seat, a guide slope is formed that tends towards the wire harness fixing seat, so as to guide the wire harness to the wire harness fixing seat during assembly.

[0016] In the above technical solution, the electronic water pump further includes a sealing plug cover component; the sealing plug cover component covers the wire harness fixing seat of the pump housing structure to shield the sealing plug component.

[0017] In the above technical solution, a plurality of second wire harness holes are provided at the sealing plug member; the wire harness passes through each of the second wire harness holes of the sealing plug member.

[0018] In the above technical solution, the surface of the sealing plug member is formed with reinforcing ribs; the reinforcing ribs of the sealing plug member create a gap between the sealing plug member and the wire harness fixing seat.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: The wiring harness fixing structure of the electronic water pump of this utility model has a wiring harness fixing seat configured at the pump shell structure, thereby integrating the wiring harness fixing seat with the pump shell structure into one piece, optimizing the assembly structure and assembly process of the wiring harness fixing seat, making the electronic water pump structure more compact and smaller in size; the sealing plug component is used to seal the gap between the wiring harness and the wiring harness fixing seat, which not only meets the waterproof sealing performance requirements of the electronic water pump at the outlet, but also avoids the wiring harness being excessively pulled or excessively swinging, thereby effectively avoiding a series of problems such as sealing failure at the outlet of the electronic water pump or wire harness desoldering, providing a reliable and stable wiring harness fixing structure for the electronic water pump, improving the operational stability and service life of the electronic water pump; in addition, the free end of the wiring harness can be freely replaced with different types of connectors, thereby meeting the customized needs of different applications. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention.

[0021] Figure 2 This is an exploded view of the present invention.

[0022] Figure 3 This is a cross-sectional view of the present invention.

[0023] Figure 4 for Figure 3 A magnified view of part A in the image.

[0024] The reference numerals in the attached drawings are as follows: 1. Pump casing structure; 101. Pump casing component; 102. End cover component; 102a. Wire harness fixing seat; 102b. Slot; 102c. Stop rib; 102d. Guide slope; 2. Drive circuit board; 3. Wire harness; 301. Fixed end; 302. Free end; 4. Sealing plug component; 401. First wire harness hole; 401a. Inner annular rib; 402. Outer annular rib; 403. Narrowed head; 5. Sealing plug cover component; 501. Second wire harness hole; 502. Hook; 503. Reinforcing rib. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This embodiment provides a wiring harness fixing structure for an electronic water pump, which is applied to an electronic water pump.

[0027] Please see Figures 1-4 The electronic water pump includes at least a pump housing structure 1 and a drive circuit board 3.

[0028] The pump casing structure 1 serves as the mechanical structural support and functional foundation of the electronic water pump (e.g., forming functional structures such as impeller chamber, rotor chamber, and stator housing).

[0029] The drive circuit board 3 is a printed circuit board (PCB), which is equipped with at least a main controller, a stator drive module / chip for driving the stator assembly, power electronic devices for power input, conversion and output, and other necessary peripheral circuits.

[0030] A wire harness fixing seat 102a is provided at the pump casing structure 1, and the wire harness fixing seat 102a passes through the inner and outer sides of the pump casing structure 1.

[0031] The drive circuit board 3 is housed within the pump housing structure 1.

[0032] A wiring harness 3 is led out from the drive circuit board 3. Specifically, the wiring harness 3 is composed of several wires with outer sheaths, which can be divided into power lines, signal lines and grounding lines, etc. In this embodiment, the wiring harness 3 is configured with 4 wires. The wiring harness 3 has a fixed end 301 and a free end 302. The fixed end 301 of the wiring harness 3 is soldered to the solder hole of the drive circuit board 3 to realize the mechanical connection and electrical connection between the wiring harness 3 and the drive circuit board 3. The free end 302 of the wiring harness 3 passes through the wiring harness fixing seat 102a of the pump housing structure 1 and is led out to the outside of the pump housing structure 1.

[0033] In order to achieve sealing and mechanical fixation between the wire harness 3 and the wire harness fixing seat 102a, a sealing plug component 4 is provided in the wire harness fixing seat 102a of the pump housing structure 1. The sealing plug component 4 is used to seal the gap between the wire harness 3 and the wire harness fixing seat 102a.

[0034] It should be noted that the sealing plug component 4 is a plug-shaped component made of one piece of rubber, silicone or flexible plastic, which has a certain degree of elasticity.

[0035] Specifically, the pump housing structure 1 includes a pump housing component 101 and an end cover component 102; wherein, the pump housing component 101 is an integrally injection-molded engineering plastic semi-shell, and in this embodiment, a shielding plate is also fixedly disposed in the pump housing component 101, the shielding plate being used to isolate the rotor chamber of the electronic water pump from the fixed cavity of the drive circuit board 3; wherein, the end cover component 102 is an integrally molded engineering plastic or metal cover; the wire harness fixing seat 102a is fixed / integrally molded at the end cover component 102, in this embodiment In this example, the end cap component 102 is made of engineering plastic, and the wire harness fixing seat 102a is integrally injection molded on the end cap component 102; the drive circuit board 3 is housed in the pump housing component 101. In this embodiment, the drive circuit board 3 is fixed to the shielding plate in the pump housing component 101 by screws or clips and is located outside the rotor chamber; the end cap component 102 covers the opening of the pump housing component 101 and shields the drive circuit board 3. In this embodiment, the end cap component 102 and the pump housing component 101 are fixed to each other by screws.

[0036] Furthermore, the sealing plug component 4 is provided with a plurality of first wire harness holes 401. Specifically, the first wire harness holes 401 are integrally formed on the sealing plug component 4 and penetrate the hole-like structural features of the sealing plug component 4. The wire harness 3 passes through each of the first wire harness holes 401 of the sealing plug component 4. In this embodiment, the number of first wire harness holes 401 corresponds to the number of wires in the wire harness 3, and each wire of the wire harness 3 passes through one of the first wire harness holes 401 of the sealing plug component 4.

[0037] Furthermore, the first wire harness hole 401 of the sealing plug component 4 has an inner annular rib 401a formed on its inner wall. Specifically, the inner annular rib 401a is a rib-shaped structure feature integrally formed in the first wire harness hole 401. In this embodiment, each first wire harness hole 401 is provided with 3 inner annular ribs 401a; the wire harness 3 and the inner annular rib 401a of the sealing plug component 4 are interference fit.

[0038] Furthermore, the surface of the sealing plug component 4 is formed with an outer annular rib 402. Specifically, the inner annular rib 401a is a rib-shaped structure integrally formed on the surface of the sealing plug component 4. In this embodiment, the surface of the sealing plug component 4 is formed with three outer annular ribs 402. The outer annular ribs 402 of the sealing plug component 4 are interference-fitted with the inner wall of the wire harness fixing seat 102a of the pump housing structure 1.

[0039] Furthermore, at least one first wire harness hole 401 of the sealing plug member 4 is a blind hole that can be punctured. In fact, by sealing the end of the first wire harness hole 401 with a film, the first wire harness hole 401 can be configured as a blind hole.

[0040] For example, in some possible embodiments, the sealing plug member 4 is provided with four first wire harness holes 401, two of which are configured as through holes and the other two as blind holes. When the electric water pump is only provided with positive and negative wires (i.e., the wire harness 3 has only two wires), only the two first wire harness holes 401 configured as through holes are needed for the positive and negative wires to pass through, and the other two first wire harness holes 401 configured as blind holes will have sealing performance, which can isolate the inner part of the wire harness fixing seat 102a. On the outer sides; when the electronic water pump is equipped with more wires (such as signal lines, grounding lines, etc.) in addition to the positive and negative wires, making the number of wires in the wiring harness 3 greater, it is only necessary to use the wire core or a sharp tool to pierce the sealing film of the first wiring harness hole 401, so as to convert the first wiring harness hole 401 in the blind hole state into the first wiring harness hole 401 in the through hole state, so that more wires can pass through; in this way, some of the first wiring harness holes 401 of the sealing plug member 4 can be configured as optional, thereby flexibly adapting to different wiring harness 3 configurations of the electronic water pump.

[0041] In the above manner, the outer annular rib 402 of the sealing plug component 4 is interference-fitted with the inner wall of the wire harness fixing seat 102a of the pump housing structure 1, and the inner annular rib 401a of the sealing plug component 4 is interference-fitted with the wire harness 3. Through the elasticity of the sealing plug component 4, the sealing plug component 4 seals the gap between the wire harness 3 and the wire harness fixing seat 102a.

[0042] Furthermore, the wiring harness fixing seat 102a of the pump housing structure 1 has an inner wall that narrows to form a stop rib 102c at one end near the inner side of the pump housing structure 1. Specifically, the stop rib 102c is a rib-shaped structural feature integrally formed in the wiring harness fixing seat 102a of the pump housing structure 1 (in this embodiment, the end cover member 102); one end of the sealing plug member 4 has a narrowed head 403. In this embodiment, one end of the sealing plug member 4 is configured as a platform, thus obtaining the narrowed head 403. In other embodiments, the sealing plug member 4 has a narrowed head 403. One end of the plug member 4 can also be configured as conical, arched, or chamfered / rounded, which can also obtain a narrowed head 403; the narrowed head 403 of the sealing plug member 4 is connected to the stop rib 102c of the wire harness fixing seat 102a of the pump housing structure 1; by the cooperation between the narrowed head 403 of the sealing plug member 4 and the stop rib 102c of the wire harness fixing seat 102a, the embedding depth of the sealing plug member 4 can be limited on the one hand, and the narrowed head 403 can guide and pre-tighten the sealing plug member 4 on the other hand.

[0043] Furthermore, on the inner side of the pump housing structure 1, near the wire harness fixing seat 102a, a guide slope 102d is formed that tends towards the wire harness fixing seat 102a, so as to guide the wire harness 3 to the wire harness fixing seat 102a during assembly; it should be noted that the guide slope 102d is a slope-shaped structural feature integrally formed on the inner side of the pump housing structure 1 (in this embodiment, it is the end cover component 102), and one end of it is connected to the wire harness fixing seat 102a.

[0044] Furthermore, the electronic water pump also includes a sealing plug component 5, which is an integrally injection-molded engineering plastic cap-shaped component; the sealing plug component 5 covers the wire harness fixing seat 102a of the pump housing structure 1 to shield the sealing plug component 4; in this embodiment, a hook 502 is formed at the sealing plug component 5, and a groove 102b is formed in the wire harness fixing seat 102a of the pump housing structure 1, and the hook 502 of the sealing plug component 5 engages with the groove 102b of the wire harness fixing seat 102a to fix the sealing plug component 5 in the wire harness fixing seat 102a.

[0045] Furthermore, the sealing plug member 5 has a plurality of second wire harness holes 501. Specifically, the second wire harness holes 501 are integrally formed on the sealing plug member 5 and penetrate the hole-like structural features of the sealing plug member 5. The wire harness 3 passes through each of the second wire harness holes 501 of the sealing plug member 5. In this embodiment, the number of wires in the second wire harness holes 501 corresponds to the number of wires in the wire harness 3, and each wire in the wire harness 3 passes through one of the second wire harness holes 501 of the sealing plug member 5.

[0046] Furthermore, a reinforcing rib 503 is formed on the surface of the sealing plug member 5. The reinforcing rib 503 is an integrally formed rib-shaped structure on the surface of the sealing plug member 5. The reinforcing rib 503 of the sealing plug member 5 creates a gap between the sealing plug member 5 and the wire harness fixing seat 102a. The configuration of the reinforcing rib 503 increases the mechanical strength of the sealing plug member 5. On the other hand, the reinforcing rib 503 abuts against the inner wall of the wire harness fixing seat 102a, making it less likely for the sealing plug member 5 to loosen or wobble relative to the wire harness fixing seat 102a. In addition, the gap between the reinforcing rib 503 and the wire harness fixing seat 102a allows sealant to be injected into the wire harness fixing seat 102a in some possible embodiments. This gap allows the sealant to pass through, ensuring that the entire wire harness fixing seat 102a is filled with sealant, thereby further improving the sealing degree between the wire harness 3 and the wire harness fixing seat 102a and preventing the sealing plug member 4 and / or the sealing plug member 5 from dislodging.

[0047] In this embodiment of the electronic water pump, during assembly, the wire harness 3 is first passed sequentially through the wire harness fixing seat 102a of the end cover component 102 (when the wire harness 3 passes through, the guide slope 102d of the end cover component 102 will guide the wire harness 3 to the wire harness fixing seat 102a), the first wire harness hole 401 of the sealing plug component 4, and the second wire harness hole 501 of the sealing plug cover component 5. Then, one end of the wire harness 3 is soldered to the solder hole of the drive circuit board 3 to form a fixed end 301. Subsequently, the drive circuit board 3 and the end cover component 102 are assembled and fixed sequentially. Finally, the sealing plug component 4 and the sealing plug cover component 5 are pushed sequentially into the wire harness fixing seat 102a of the end cover component 102, thus completing the assembly process of the drive circuit board 3 and the end cover component 102.

[0048] In this embodiment, the wiring harness fixing structure of the electronic water pump includes a wiring harness fixing seat 102a at the pump housing structure 1, integrating the wiring harness fixing seat 102a with the pump housing structure 1 into one unit. This optimizes the assembly structure and process of the wiring harness fixing seat 102a, making the electronic water pump more compact and smaller in size. The sealing plug component 4 is used to seal the gap between the wiring harness 3 and the wiring harness fixing seat 102a, which not only meets the waterproof sealing performance requirements of the electronic water pump at the outlet, but also prevents the wiring harness 3 from being excessively pulled or excessively swinging. This effectively avoids a series of problems such as sealing failure at the outlet of the electronic water pump or detachment of the wiring harness 3, providing a reliable and stable wiring harness 3 fixing structure for the electronic water pump, and improving the operational stability and service life of the electronic water pump. In addition, the free end 302 of the wiring harness 3 can be freely replaced with different types of connectors to meet the customized needs of different applications.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wiring harness fixing structure for an electronic water pump, used in an electronic water pump; characterized in that, The electronic water pump includes at least a pump housing structure and a drive circuit board; A wire harness fixing seat is provided at the pump housing structure, and the wire harness fixing seat passes through the inner and outer sides of the pump housing structure. The drive circuit board is housed within the pump housing structure; The wiring harness is led out from the drive circuit board, and the free end of the wiring harness passes through the wiring harness fixing seat of the pump housing structure and is led out to the outside of the pump housing structure; A sealing plug component is provided in the wiring harness fixing seat of the pump housing structure, and the sealing plug component is used to seal the gap between the wiring harness and the wiring harness fixing seat.

2. The wiring harness fixing structure of the electronic water pump according to claim 1, characterized in that, The pump casing structure includes a pump casing component and an end cover component; The wire harness fixing seat is fixed / integratedly formed at the end cap component; The drive circuit board is housed within the pump housing component; The end cap component covers the opening of the pump housing component and shields the drive circuit board.

3. The wiring harness fixing structure of the electronic water pump according to claim 1 or 2, characterized in that, The sealing plug component has several first wire harness holes; The wire harness passes through each of the first wire harness holes of the sealing plug component.

4. The wiring harness fixing structure of the electronic water pump according to claim 3, characterized in that, The first wire harness hole of the sealing plug component has an inner annular rib formed on its inner wall. The wire harness is interference-fitted with the inner annular rib of the sealing plug component; The surface of the sealing plug component is formed with an outer annular rib; The outer annular rib of the sealing plug component is interference-fitted with the inner wall of the wire harness fixing seat of the pump housing structure.

5. The wiring harness fixing structure of the electronic water pump according to claim 3, characterized in that, At least one first wire harness hole of the sealing plug component is a blind hole that can be punctured.

6. The wiring harness fixing structure of the electronic water pump according to claim 1 or 2, characterized in that, The wiring harness fixing seat of the pump housing structure has a narrowed inner wall at one end near the inner side of the pump housing structure to form a stop rib. One end of the sealing plug component is formed with a narrowed head; The narrowed head of the sealing plug component is connected to the stop rib of the wire harness fixing seat of the pump housing structure.

7. The wiring harness fixing structure of the electronic water pump according to claim 1 or 2, characterized in that, On the inner side of the pump housing structure, near the wire harness fixing seat, a guide slope is formed that tends towards the wire harness fixing seat to guide the wire harness to the wire harness fixing seat during assembly.

8. The wiring harness fixing structure of the electronic water pump according to claim 1 or 2, characterized in that, The electronic water pump also includes a sealing plug component; The sealing plug component covers the wiring harness fixing seat of the pump housing structure to shield the sealing plug component.

9. The wiring harness fixing structure of the electronic water pump according to claim 8, characterized in that, The sealing plug component has several second wire harness holes; The wiring harness passes through each of the second wiring harness holes of the sealing plug member.

10. The wiring harness fixing structure of the electronic water pump according to claim 8, characterized in that, The surface of the sealing plug component is formed with reinforcing ribs; The reinforcing ribs of the sealing plug member create a gap between the sealing plug member and the wire harness fixing seat.

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