Electrical cavity air tightness test fixture for electronic water pump

Abstract

The utility model provides an electronic water pump's electrical cavity air tightness test fixture, including base, first fixed seat for installing second clamping part, second fixed seat for installing electronic water pump and third fixed seat for installing first clamping part, first fixed seat, second fixed seat and third fixed seat are sequentially arranged on the base along the axial direction, first clamping part is equipped with first air inlet, when the end of first clamping part is sealedly connected along the radial direction with the plug-in interface of electronic water pump, first air inlet is connected with the electrical cavity of electronic water pump, second clamping part is equipped with second air inlet, when the end of second clamping part is sealedly connected along the axial direction with the air hole of electronic water pump end cover, second air inlet is connected with the electrical cavity of electronic water pump, first air inlet and second air inlet are connected with air tightness test device. The utility model can effectively improve the detection precision of electronic water pump electrical cavity air tightness.

Description

Technical Field

[0001] This utility model relates to the field of water pump testing, and in particular to a test fixture for the airtightness of the electrical cavity of an electronic water pump. Background Technology

[0002] The electric water pump is a crucial component of a car's cooling system, circulating coolant in a negative circulatory manner to maintain the engine's normal operating temperature. Due to the complexity of its internal structure and the special nature of its working environment, the airtightness of the electric water pump is of paramount importance to ensuring its performance and lifespan. Poor airtightness of the electric water pump can lead to coolant leakage, resulting in serious consequences such as engine overheating, performance degradation, or even damage. Therefore, airtightness testing of the electric water pump is a key step in ensuring the safe and stable operation of the car's cooling system.

[0003] In existing technologies, the airtightness of an electronic water pump is typically tested by placing the entire pump inside an airtightness testing device. The airtightness of the pump's electrical components is then determined through overall testing. However, this method results in insufficient accuracy in measuring the airtightness of the pump's electrical components, thus affecting the test results. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a test fixture for the airtightness of the electrical cavity of an electronic water pump, which can effectively improve the detection accuracy of the airtightness of the electrical cavity of an electronic water pump.

[0005] This utility model proposes a test fixture for the airtightness of the electrical cavity of an electronic water pump, comprising a base, a first fixed seat for mounting a second clamping part, a second fixed seat for mounting the electronic water pump, and a third fixed seat for mounting the first clamping part. The first fixed seat, the second fixed seat, and the third fixed seat are sequentially arranged on the base along the axial direction. The first clamping part has a first air inlet. When the end of the first clamping part is radially sealed to the connector of the electronic water pump, the first air inlet communicates with the electrical cavity of the electronic water pump. The second clamping part has a second air inlet. When the end of the second clamping part is axially sealed to the vent hole of the end cover of the electronic water pump, the second air inlet communicates with the electrical cavity of the electronic water pump. Both the first air inlet and the second air inlet are connected to an airtightness testing device.

[0006] Preferably, the first clamping part includes a first mounting base, a first push rod, and a first connecting part. The first mounting base is fixed on the third fixed base. One end of the first connecting part passes through the first mounting base axially. The outer side of the first push rod is hinged to the first mounting base, and the inner side of the first push rod is hinged to the end of the first connecting part. Rotating the first push rod causes the first connecting part to extend and retract axially. The first connecting part is radially inserted into the electronic water pump connector at the end away from the first push rod.

[0007] Preferably, a sealing ring is provided at the connection between the first connecting part and the electronic water pump interface to achieve radial sealing of the connector.

[0008] Preferably, the second clamping part includes a second mounting base, a second push rod, and a second connecting part. The second mounting base is fixed on the first fixed base, one end of the second connecting part passes through the second mounting base, the inner side of the second push rod is hinged to the second connecting part, and the outer side of the second push rod is hinged to the second mounting base. Rotating the second push rod causes the second connecting part to perform telescopic movement, so as to realize the connection of the second connecting part with the vent hole of the electronic water pump along the axial direction.

[0009] Preferably, the second connecting part includes an abutment part, a push plate, and a first movable rod. One end of the first movable rod passes through the second mounting base axially and is hinged to the second push rod. The other end of the first movable rod is fixedly provided with the push plate. The abutment part is adjustablely disposed on the push plate so that the abutment part is connected to the vent of the electronic pump. A second air inlet is provided on the abutment part.

[0010] Preferably, a mounting groove is provided circumferentially at the connection between the abutting part and the vent hole of the electronic water pump, and a sealing ring is provided in the mounting groove.

[0011] Preferably, the abutment portion has a groove at the end away from the electronic pump vent, and the groove is arranged along the X-axis; the groove can accommodate the fixing portion connecting the push plate and the first movable rod.

[0012] Preferably, the abutting part has a plurality of first adjustment holes on the surface where the groove is located, and the first adjustment holes are arranged in an array; the push plate has a second adjustment hole corresponding to the first adjustment hole, and the first adjustment hole and the second adjustment hole are perpendicular to each other, and the first adjustment hole and the second adjustment hole are fixed together by a locking member.

[0013] Preferably, the second clamping part further includes a guide part, the guide part including a third mounting base and a second movable rod, the third mounting base being disposed on the first fixed base, the second movable rod passing through the third mounting base and connected to the push plate, so that the push plate can perform a stable telescopic movement along the axial direction.

[0014] As described above, the electrical cavity airtightness test fixture for an electronic water pump disclosed in this utility model has the following beneficial effects:

[0015] This invention fixes an electronic water pump to a second mounting base, inserts the end of the first clamping part radially into the connector of the electronic water pump, and forms a seal between the first clamping part and the connector. The end of the second clamping part is axially connected to the vent hole of the electronic water pump end cover for sealing. An airtightness testing device simultaneously pressurizes and maintains pressure through the first and second air inlets to measure the leakage in the electrical area of ​​the water pump. This invention effectively improves the accuracy of airtightness testing of the electrical cavity of an electronic water pump. Attached Figure Description

[0016] Figure 1 A three-dimensional schematic diagram of an electrical cavity airtightness test fixture for an electronic water pump provided in an embodiment of this utility model.

[0017] Figure 2 This is a front view of an electrical cavity airtightness test fixture for an electronic water pump provided in an embodiment of the present invention.

[0018] Figure 3 This is a rear view of an electrical cavity airtightness test fixture for an electronic water pump provided in an embodiment of the present invention.

[0019] Figure 4 The left view of the electrical cavity airtightness test fixture for an electronic water pump provided in an embodiment of this utility model.

[0020] Figure 5 This is a front view of an electronic water pump during testing, provided in an embodiment of the present invention.

[0021] Figure 6 This is a top view of an electronic water pump during testing, provided in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100, Base; 200, Second clamping part; 210, Second air inlet; 220, Second mounting base; 230, Second push rod; 240, Second connecting part; 241, Abutting part; 2411, Mounting groove; 2412, Groove; 2413, First adjusting hole; 2421, Second adjusting hole; 242, Push plate; 243, First movable rod; 244, Fixing part; 250, Guide part; 251, Third mounting base; 252, Second movable rod; 300, First fixing base; 400, Electronic water pump; 500, Second fixing base; 600, First clamping part; 610, First mounting base; 620, First push rod; 630, First connecting part; 700, Third fixing part. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0025] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0026] like Figures 1-6 As shown, an embodiment of an electrical cavity airtightness testing fixture for an electronic water pump includes a base 100, a first fixing seat 300 for mounting a second clamping part 200, a second fixing seat 500 for mounting an electronic water pump 400, and a third fixing seat 700 for mounting a first clamping part 600. The first fixing seat 300, the second fixing seat 500, and the third fixing seat 700 are sequentially arranged on the base 100 along the axial direction. A first air inlet is provided on the first clamping part 600. In this embodiment, the first air inlet is preferably provided on the side wall of the first clamping part 600. A first air intake channel is provided inside the first clamping part 600, and the first air intake channel extends to the end of the first clamping part 600. When the end of the first clamping part 600 is radially sealed to the connector on the electronic water pump 400, the first air inlet channel is connected to the connector of the electronic water pump. Gas entering from the first air inlet will enter the electrical cavity of the electronic water pump through the connector via the first air inlet channel, thus ensuring that the first air inlet is connected to the electrical cavity of the electronic water pump. The second clamping part 200 is provided with a second air inlet 210, which includes, but is not limited to, being located at the top of the second clamping part 200. The second clamping part 200 is also provided with a second air inlet channel that communicates with the second air inlet 210. The second air inlet channel extends to the end of the second clamping part 200. When the end of the second clamping part 200 is axially sealed to the vent hole of the end cover of the electronic water pump, gas is supplied to the second air inlet 210. The gas enters the electrical cavity of the electronic water pump through the second air inlet 210 and the second air inlet channel. Both the first air inlet and the second air inlet 210 are connected to an airtightness testing device, wherein the airtightness testing device supplies the first air inlet and the second air inlet 210 with equal gas pressure.

[0027] During testing, such as Figure 5 and Figure 6 As shown, the electronic water pump to be tested is placed on the second fixed base 500 and fixed. Then, the end of the first clamping part 600 is radially sealed to the plug interface of the electronic water pump, and the end of the second clamping part 200 is axially sealed to the vent hole of the end cover of the electronic water pump. The airtightness testing device simultaneously supplies air at the same pressure to the first air inlet and the second air inlet 210 through the pipeline, so as to simultaneously pressurize the electrical cavity of the electronic water pump through the first air inlet and the second air inlet 210, and then maintain the pressure. The leakage of the electrical area of ​​the electronic water pump can be measured by the testing device, thereby determining whether the electronic water pump is qualified.

[0028] In one embodiment, such as Figure 2 and Figure 3 As shown, the first clamping part 600 includes a first mounting base 610, a first push rod 620, and a first connecting part 630. The first mounting base 610 is fixed on the third fixed base 700. One end of the first connecting part 630 passes through the first mounting base 610 axially, allowing the first connecting part 630 to move back and forth axially. The outer side of the first push rod 620 is hinged to the first mounting base 610, and the inner side of the first push rod 620 is hinged to the end of the first connecting part 630. Rotating the first push rod 620 causes the first connecting part 630 to extend and retract axially. The end of the first connecting part 630 away from the first push rod 620 can be radially inserted into the electronic water pump connector. In this embodiment, the first push rod 620 can rotate around the X-axis and also around the Z-axis, as long as the first push rod 620 rotates towards the side closer to the third fixed base 700 to achieve locking. To ensure a sealing effect, a sealing ring is provided at the interface between the first connecting part 630 and the electronic water pump to achieve radial sealing of the connector.

[0029] Before testing, the first push rod 620 needs to be rotated away from the third fixed seat 700 to unlock it. At this time, the first connecting part 630 is in an axially movable state. Rotating the first push rod 620 towards the third fixed seat 700 will move the first connecting part 630 axially to the installation position. Then, the end of the first connecting part 630 is inserted radially into the electric water pump connector and fixed to achieve a sealing effect. At this time, under the action of the first push rod 620, the first connecting part 630 is in a locked state to prevent it from loosening during the test and affecting the sealing performance.

[0030] In one embodiment, such as Figure 3 and Figure 6As shown, the second clamping part 200 includes a second mounting base 220, a second push rod 230, and a second connecting part 240. The second mounting base 220 is fixed on the first fixed base 300. One end of the second connecting part 240 passes through the second mounting base 220, allowing the second connecting part 240 to move back and forth along the axial direction. The inner side of the second push rod 230 is hinged to the second connecting part 240, and the outer side of the second push rod 230 is hinged to the second mounting base 220. Rotating the second push rod 230 causes the second connecting part 240 to perform telescopic movement, thereby realizing the connection of the second connecting part 240 with the vent hole of the electronic water pump along the axial direction. Preferably, the second push rod 230 rotates around the X-axis.

[0031] Before testing, the second push rod 230 is unlocked by rotating it clockwise around the X-axis, at which point the second connecting part 240 is in an axially movable state. Then, the second push rod 230 is rotated counterclockwise around the X-axis, causing it to move the second connecting part 240 axially until its end abuts against the end cover of the electric water pump, thus achieving a sealed connection between the end of the second connecting part 240 and the vent. At this point, under the action of the second push rod 230, the second connecting part 240 is locked, preventing loosening during testing that could affect the sealing performance.

[0032] In one embodiment, such as Figure 3 , Figure 4 and Figure 6 As shown, the second connecting part 240 includes an abutment part 241, a push plate 242, and a first movable rod 243. One end of the first movable rod 243 passes through the second mounting base 220 axially and is hinged to the second push rod 230. The other end of the first movable rod 243 is fixedly mounted on the push plate 242. Rotating the second push rod 230 can drive the first movable rod 243 to move axially. The abutment part 241 is adjustablely mounted on the push plate 242. The position of the abutment part 241 can be adjusted along the Z-axis and X-axis directions, so that the abutment part 241 connects with the vent of the electronic pump. A second air inlet 210 is provided on the abutment part 241, and a second air inlet channel is provided inside the abutment part 241, so that gas can connect with the vent from the second air inlet 210 through the second air inlet channel. Among them, a mounting groove 2411 is circumferentially provided at the connection between the abutment part 241 and the vent of the electronic water pump, and a sealing ring is provided in the mounting groove 2411.

[0033] In use, rotating the second push rod 230 causes the first movable rod 243 and the push plate 242 to move axially (i.e., in the Y-axis direction), thereby causing the abutment part 241 to abut against the end cover of the electronic water pump. The second air inlet 210 is connected to the vent hole of the electronic water pump through the second air inlet channel. At this time, the second push rod 230 is in a locked state, and the sealing ring abuts against the end cover of the electronic water pump and is in a compressed state to ensure a sealing effect and effectively improve the accuracy of airtightness testing.

[0034] In one embodiment, such as Figure 2 and Figure 4 As shown, the abutment part 241 has a groove 2412 at the end away from the vent of the electronic pump, and the groove 2412 is arranged along the X-axis direction. The groove 2412 can accommodate the fixing part 244 that connects the push plate 242 and the first movable rod 243, so as to avoid interference between the abutment part 241 and the fixing part 244 when the position of the abutment part 241 is finely adjusted along the X-axis and Z-axis directions.

[0035] In one embodiment, Figure 6 As shown, the second clamping part 200 also includes a guide part 250, which includes a third mounting base 251 and a second movable rod 252. The third mounting base 251 is disposed on the first fixed base 300, and the second movable rod 252 passes through the third mounting base 251 and is connected to the push plate 242, so that the push plate 242 can perform a stable telescopic movement along the axial direction.

[0036] In use, rotate the second push rod 230 to the locked state, so that the first movable rod 243 drives the push plate 242 to move axially, and the push plate 242 drives the second movable rod 252 to move axially. Under the guidance of the second movable rod 252, the abutment part 241 can stably connect with the vent hole of the electric water pump axially.

[0037] In one embodiment, the abutment portion 241 has a plurality of first adjustment holes 2413 on the surface where the groove 2412 is located, and the first adjustment holes 2413 are arranged in an array. The push plate 242 has a second adjustment hole 2421 corresponding to the first adjustment hole 2413, and the first adjustment hole 2413 and the second adjustment hole 2421 are perpendicular to each other. The first adjustment hole 2413 and the second adjustment hole 2421 are fixed together by a locking member (not shown in the figure).

[0038] In use, if there is a positional deviation between the abutment part 241 and the vent hole of the electronic water pump, the position of the abutment part 241 can be finely adjusted along the Y and Z axes by loosening the locking piece to ensure that the abutment part 241 can connect with the vent hole of the electronic water pump. After the position of the abutment part 241 is adjusted, the locking piece is tightened to fix the adjusted position of the abutment part 241.

[0039] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A test fixture for the airtightness of the electrical cavity of an electronic water pump, characterized in that, The system includes a base (100), a first fixing seat (300) for mounting a second clamping part (200), a second fixing seat (500) for mounting an electric water pump (400), and a third fixing seat (700) for mounting a first clamping part (600). The first fixing seat (300), the second fixing seat (500), and the third fixing seat (700) are sequentially arranged axially on the base (100). A first air inlet is provided on the first clamping part (600). When the end of the clamping part (600) is radially sealed to the plug interface of the electronic water pump (400), the first air inlet is connected to the electrical cavity of the electronic water pump; the second clamping part (200) is provided with a second air inlet (210), and when the end of the second clamping part (200) is axially sealed to the vent hole of the end cover of the electronic water pump, the second air inlet (210) is connected to the electrical cavity of the electronic water pump; both the first air inlet and the second air inlet (210) are connected to the airtightness testing device.

2. The electrical cavity airtightness test fixture for an electronic water pump according to claim 1, characterized in that, The first clamping part (600) includes a first mounting base (610), a first push rod (620), and a first connecting part (630). The first mounting base (610) is fixed on the third fixed base (700). One end of the first connecting part (630) passes through the first mounting base (610) axially. The outer side of the first push rod (620) is hinged to the first mounting base (610), and the inner side of the first push rod (620) is hinged to the end of the first connecting part (630). Rotating the first push rod (620) causes the first connecting part (630) to move axially. The first connecting part (630) is radially inserted into the electronic water pump connector at the end away from the first push rod (620).

3. The electrical cavity airtightness test fixture for an electronic water pump according to claim 2, characterized in that, A sealing ring is provided at the connection between the first connecting part (630) and the electronic water pump interface to achieve radial sealing of the connector.

4. The electrical cavity airtightness test fixture for an electronic water pump according to claim 1, characterized in that, The second clamping part (200) includes a second mounting base (220), a second push rod (230), and a second connecting part (240). The second mounting base (220) is fixed on the first fixed base (300). One end of the second connecting part (240) passes through the second mounting base (220). The inner side of the second push rod (230) is hinged to the second connecting part (240), and the outer side of the second push rod (230) is hinged to the second mounting base (220). Rotating the second push rod (230) causes the second connecting part (240) to perform telescopic movement, so as to realize that the second connecting part (240) is connected to the vent hole of the electric water pump along the axial direction.

5. The electrical cavity airtightness test fixture for an electronic water pump according to claim 4, characterized in that, The second connecting part (240) includes an abutment part (241), a push plate (242) and a first movable rod (243). One end of the first movable rod (243) passes through the second mounting base (220) axially and is hinged to the second push rod (230). The other end of the first movable rod (243) is fixedly provided with the push plate (242). The abutment part (241) is adjustablely disposed on the push plate (242) so that the abutment part (241) is connected to the vent of the electronic pump. A second air inlet (210) is provided on the abutment part (241).

6. The electrical cavity airtightness test fixture for an electronic water pump according to claim 5, characterized in that, The abutment part (241) is provided with a mounting groove (2411) circumferentially at the connection point with the vent hole of the electronic water pump, and a sealing ring is provided in the mounting groove (2411).

7. The electrical cavity airtightness test fixture for an electronic water pump according to claim 5, characterized in that, The abutment part (241) has a groove (2412) at one end away from the vent hole of the electronic pump, and the groove (2412) is arranged along the X-axis direction; the groove (2412) can accommodate the fixing part (244) that connects the push plate (242) and the first movable rod (243).

8. The electrical cavity airtightness test fixture for an electronic water pump according to claim 7, characterized in that, The abutting part (241) has a plurality of first adjustment holes (2413) on the surface where the groove (2412) is located, and the first adjustment holes (2413) are arranged in an array; the push plate (242) has a second adjustment hole (2421) corresponding to the first adjustment hole (2413), and the first adjustment hole (2413) and the second adjustment hole (2421) are perpendicular to each other, and the first adjustment hole (2413) and the second adjustment hole (2421) are fixed together by a locking member.

9. The electrical cavity airtightness test fixture for an electronic water pump according to claim 5, characterized in that, The second clamping part (200) also includes a guide part (250), which includes a third mounting base (251) and a second movable rod (252). The third mounting base (251) is disposed on the first fixed base (300), and the second movable rod (252) passes through the third mounting base (251) and is connected to the push plate (242), so that the push plate (242) can perform a stable telescopic movement along the axial direction.

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