Water tank cover detection device of automobile warm water heater

Abstract

The utility model relates to the field of automobile part performance testing and discloses a water tank cover detection device of an automobile warm water heater. The water tank cover detection device comprises a rack, a detection table, a vertical pressing assembly, a tool bottom plate and a profiling body. The vertical pressing assembly is used for pressing the water tank to cover the profiling body, and a first air channel and a second air channel which communicate with each other are formed in the tool bottom plate. A third air channel communicated with the first air channel and the second air channel is formed in the profiling body, the third air channel is communicated with an inner cavity of the water tank cover, the first air channel is connected with an air supply mechanism, and the second air channel is connected with an air pressure detection mechanism; and four insertion assemblies for detecting whether the mounting holes are through or not are arranged below the detection table. The water tank cover detection device provided by the utility model can detect the air tightness of the water tank cover and whether the mounting hole is through at the same time under the condition of one-time clamping, thereby comprehensively ensuring the quality of the water tank cover and greatly improving the detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive component performance testing, and in particular to a device for testing the water tank cap of an automotive hot water heater. Background Technology

[0002] The water tank of a car's water heater plays a role in buffering and regulating the water temperature. The heating process may not be continuous and stable, and there may be fluctuations in heating power. The large amount of hot water stored in the tank can mitigate these temperature fluctuations to some extent. When the heating speed is too fast and the water temperature becomes too high, the cool water in the tank can mix with it to cool it down; conversely, when the heating is insufficient and the water temperature drops, the relatively warmer water in the tank can replenish the heat, thus maintaining a relatively stable final output water temperature for heating or other purposes. This creates a more comfortable temperature environment inside the vehicle and avoids discomfort to passengers caused by sudden temperature changes.

[0003] The water tank of an automotive water heater consists of a tank body and a tank cap. The tank body and tank cap are primarily formed by die casting. (See...) Figure 7 As shown, the bottom of the water tank cover forms an open inner cavity structure and mounting holes are provided at the four corners of the water tank cover. In order to ensure that there are no manufacturing defects and that all products supplied to external parties are of good quality, it is necessary to develop a testing device for the water tank cover. This device not only performs airtightness testing on the cast water tank cover, but also checks whether the mounting holes are penetrated.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a water tank cap testing device for automotive water heaters, which aims to simultaneously test the airtightness of the water tank cap and whether the mounting holes are unobstructed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A water tank cap testing device for an automotive water heater includes a frame, a testing platform mounted on the frame, a vertical clamping assembly, a fixture base plate mounted on the testing platform, and a contoured body mounted on the fixture base plate and adapted to the shape of the water tank cap. The vertical clamping assembly is used to clamp the water tank cap onto the contoured body. The fixture base plate has a first air passage and a second air passage that are interconnected. The contoured body has a third air passage that communicates with the first and second air passages and is connected to the inner cavity of the water tank cap. The first air passage is connected to an air supply mechanism, and the second air passage is connected to an air pressure detection mechanism. The contoured body, the bottom of the fixture, and the testing platform have clearance holes corresponding to the positions of the mounting holes on the water tank cap. Four through-hole components are provided below the testing platform for detecting whether the mounting holes are through.

[0008] As a further improvement to the above technical solution, each of the interlocking components includes a mounting base, a lifting cylinder disposed upward on the mounting base, an insert rod connected to the piston rod of the lifting cylinder, and a magnetic switch disposed on the lifting cylinder.

[0009] As a further improvement to the above technical solution, the contoured body is provided with a sealing ring that forms a seal at the junction of the water tank cover edge and the contoured body.

[0010] As a further improvement to the above technical solution, the contoured body is provided with a positioning pin and a positioning block for positioning the water tank cover.

[0011] As a further improvement to the above technical solution, the vertical clamping assembly includes a vertically downward pressing cylinder, a top plate connected to the output end of the pressing cylinder, and multiple clamping components disposed at the bottom of the top plate.

[0012] As a further improvement to the above technical solution, the clamping component includes a guide sleeve, a spring, and a pressure rod. The guide sleeve is disposed on the lower surface of the top plate. The upper part of the pressure rod is slidably disposed inside the guide sleeve. The middle part of the pressure rod is provided with an abutment portion. The spring is sleeved on the pressure rod. The lower end of the spring abuts against the abutment portion, and the upper end of the spring abuts against the lower end of the guide sleeve. The bottom end of the pressure rod is used to press down on the top of the water tank cover.

[0013] As a further improvement to the above technical solution, the detection platform is equipped with a through-beam sensor for detecting whether the workpiece is placed correctly.

[0014] As a further improvement to the above technical solution, the testing platform is equipped with a qualified marking gun.

[0015] The beneficial effects of this utility model are as follows: The water tank cover testing device provided by this utility model can simultaneously test the airtightness of the water tank cover and whether the mounting hole is through in a single clamping, thus comprehensively ensuring the quality of the water tank cover and greatly improving the testing efficiency. Attached Figure Description

[0016] Figure 1 Three-dimensional water tank cover detection device Figure 1 .

[0017] Figure 2 Three-dimensional water tank cover detection device Figure 2 .

[0018] Figure 3 Three-dimensional water tank cover detection device Figure 3 .

[0019] Figure 4 A schematic diagram showing the interleaved components positioned below the testing platform.

[0020] Figure 5 This is a structural diagram of the interlocking components.

[0021] Figure 6 This is a schematic diagram of the structure of the water tank cover installed on the prototype.

[0022] Figure 7 This is a 3D view of the water tank lid.

[0023] Explanation of main component symbols: 2-Detection table, 3-Vertical clamping assembly, 32-Top plate, 33-Clamping component, 331-Guide sleeve, 332-Spring, 333-Pressure rod, 4-Tooling base plate, 41-First air passage, 42-Second air passage, 51-Following body, 52-Third air passage, 53-Allowing hole, 54-Sealing ring, 55-Positioning pin, 56-Positioning block, 6-Intercalation assembly, 61-Mounting base, 62-Lifting cylinder, 63-Insertion rod, 64-Magnetic switch, 7-Through-beam sensor, 8-Qualified marking gun, 9-Water tank cover, 91-Mounting hole, 92-Positioning hole, 93-Inner cavity. Detailed Implementation

[0024] This utility model provides a detection device for the water tank cap 9 of an automotive water heater. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0025] Please see Figures 1 to 7This utility model provides a detection device for the water tank cap 9 of an automotive hot water heater, including a frame, a detection platform 2 and a vertical pressing assembly 3 mounted on the frame, a tooling base plate 4 mounted on the detection platform 2, and a contoured body 51 mounted on the tooling base plate 4 and adapted to the shape of the water tank cap 9. The vertical pressing assembly 3 is used to press the water tank cap 9 onto the contoured body 51. The tooling base plate 4 has a first air passage 41 and a second air passage 42 that are interconnected. The contoured body 51 has a third air passage 52 that is connected to the first air passage 41 and the second air passage 42. The third air passage 52 is connected to the inner cavity 93 of the water tank cap 9. The first air passage 41 is connected to an air supply mechanism, and the second air passage 42 is connected to an air pressure detection mechanism. The contoured body 51, the bottom of the tooling, and the detection platform 2 have clearance holes 53 that correspond to the positions of the mounting holes 91 on the water tank cap 9. Four through-hole components 6 are provided below the detection platform 2 for detecting whether the mounting holes 91 are through.

[0026] When testing the water tank cover 9, the water tank cover 9 is placed on the contour body 51 on the tooling base plate 4. The vertical clamping assembly 3 presses the water tank cover 9 firmly onto the contour body 51, ensuring a tight fit between the water tank cover 9 and the contour body 51. Then, the first air passage 41 is connected to the air supply mechanism, which can input gas into the air passage system. The gas enters the inner cavity 93 of the water tank cover 9 through the first air passage 41, the second air passage 42, and the third air passage 52. The air pressure detection mechanism is connected to the second air passage 42 and can detect air pressure changes in the air passage system. If the water tank cover 9 has good air tightness, the air pressure change should be within a reasonable range within a certain period of time; if the water tank cover 9 has air leakage, the air pressure detection mechanism will detect an abnormal drop in air pressure, thereby determining whether the air tightness of the water tank cover 9 meets the requirements. At the same time, the insertion component 6 can be inserted upward through the clearance hole 53. If the mounting hole 91 is through, the insertion component 6 can pass through the mounting hole 91 smoothly; if the mounting hole 91 is blocked or not completely penetrated, the insertion component 6 cannot pass through normally, thereby realizing the detection of whether the mounting hole 91 is through.

[0027] The water tank cover 9 testing device provided by this utility model can simultaneously test the airtightness of the water tank cover 9 and the continuity of the mounting hole 91 in a single clamping operation, thus comprehensively ensuring the quality of the water tank cover 9 and greatly improving testing efficiency.

[0028] For details, see Figure 4 and Figure 5As shown, each of the inserted components 6 includes a mounting base 61, a lifting cylinder 62 mounted upwards on the mounting base 61, an insert rod 63 connected to the piston rod of the lifting cylinder 62, and a magnetic switch 64 mounted on the lifting cylinder 62. The piston rod of the lifting cylinder 62 extends, causing the connected insert rod 63 to move upwards. The insert rod 63 moves towards the mounting hole 91 of the water tank cover 9 through the detection platform 2, the bottom of the tooling, and the clearance hole 53 on the contour body 51 corresponding to the position of the mounting hole 91 on the water tank cover 9. Because a magnetic switch 64 is mounted on the lifting cylinder 62, when the insert rod 63 moves to a certain position with the piston rod of the lifting cylinder 62, the magnetic switch 64 senses signals such as changes in the magnetic field of the cylinder or changes in the position of the piston rod, providing real-time and accurate feedback on the position information of the insert rod 63. If the insertion rod 63 can pass smoothly through the mounting hole 91 of the water tank cover 9, the magnetic switch 64 will record the signal that the insertion rod 63 has risen to the correct position. If there is a blockage in the mounting hole 91 or the insertion rod is not fully penetrated, the insertion rod 63 will not rise to the predetermined position normally, and the magnetic switch 64 will not receive the corresponding signal. Therefore, the magnetic switch 64 can determine whether the mounting hole 91 is clear through the signal feedback. The magnetic switch 64 will send the signal back to the control system. If it is determined that the mounting hole 91 of the water tank cover 9 is not clear through, an alarm will be issued to remind the staff that the water tank cover 9 is defective.

[0029] It should be noted that the insertion rod 63 and the mounting hole 91 on the water tank cover 9 are in clearance fit. There may be burrs in the mounting hole 91. The insertion rod 63 can also push out the burrs in the mounting hole 91 during the rising process to achieve cleaning.

[0030] Specifically, the contoured body 51 is provided with a sealing ring 54 that forms a seal at the junction of the water tank cover 9 and the contoured body 51, preventing gas leakage at the junction from interfering with the test results, thereby greatly improving the accuracy and reliability of the airtightness test.

[0031] To ensure a clear installation position reference for the water tank cover 9 on the contour body 51, the contour body 51 is equipped with a positioning pin 55 and a positioning block 56 for positioning the water tank cover 9. When the water tank cover 9 is placed on the detection device, the water tank cover 9 can quickly and accurately find the correct installation position by cooperating with the positioning pin 55 and the positioning block 56. Specifically, the positioning pin 55 cooperates with the positioning hole 92 on the water tank cover 9, and the positioning block 56 cooperates with the edge of the water tank cover 9, thus avoiding detection errors caused by inaccurate placement.

[0032] For details, see Figure 2As shown, the vertical clamping assembly 3 includes a vertically downward-facing pressing cylinder, a top plate 32 connected to the output end of the pressing cylinder, and multiple clamping elements 33 disposed at the bottom of the top plate 32. The pressing cylinder operates vertically downward, providing vertical and stable pressure. When the water tank cover 9 is being tested, the pressing cylinder causes the top plate 32 to move the clamping elements 33 downward, uniformly pressing the water tank cover 9 onto the contour body 51. This stable clamping force ensures a tight fit between the water tank cover 9 and the contour body 51, creating good sealing conditions for subsequent airtightness testing and mounting hole 91 testing. Multiple clamping elements 33 (six clamping elements 33 in this embodiment) are disposed at the bottom of the top plate 32, which can clamp the water tank cover 9 at different positions. Compared to a single clamping point, multiple clamping elements 33 can distribute pressure more evenly, allowing the water tank cover 9 to be in close contact with the contour body 51 across the entire surface, further improving the stability and reliability of the sealing effect.

[0033] Further details can be found here. Figure 2As shown, the clamping member 33 includes a guide sleeve 331, a spring 332, and a pressure rod 333. The guide sleeve 331 is disposed on the lower surface of the top plate. The upper part of the pressure rod 333 is slidably disposed inside the guide sleeve 331. The middle part of the pressure rod 333 is provided with an abutment portion. The spring 332 is sleeved on the pressure rod 333. The lower end of the spring 332 abuts against the abutment portion, and the upper end of the spring 332 abuts against the lower end of the guide sleeve 331. The bottom end of the pressure rod 333 is used to press down on the top of the water tank cover 9. In the initial state (i.e., when the water tank cover 9 is not clamped), the spring 332 is in a naturally extended state, the upper part of the pressure rod 333 is located inside the guide sleeve 331, and its bottom end is a certain distance from the top of the water tank cover 9. When the pressure cylinder is activated and pushes the top plate 32 downward, the top plate 32 drives the guide sleeve 331 and the pressure rod 333 connected to it to move downward together. As the pressure rod 333 gradually approaches the top of the water tank cover 9, the bottom end of the pressure rod 333 first contacts the top of the water tank cover 9. The continued downward pressure causes the pressure rod 333 to slide upward relative to the guide sleeve 331. At this time, the abutting part in the middle of the pressure rod 333 will compress the spring 332. During the compression process, the spring 332 will generate a reverse elastic force. This elastic force acts on the top of the water tank cover 9 through the pressure rod 333, so that the pressure of the pressure rod 333 on the water tank cover 9 comes from both the initial pressure pushed by the cylinder and the elastic pressure of the spring 332. When a certain degree of compression is reached, the pressure cylinder stops moving. At this time, the pressure rod 333, under the combined action of the elastic force of the spring 332 and the thrust of the cylinder, stably presses the top of the water tank cover 9. The presence of the spring 332 can play a role in buffering and adaptive adjustment. If there is unevenness or height difference at the top of the water tank cover 9, the spring 332 can adapt to this situation through its own compression deformation, ensuring that each pressure bar 333 can apply pressure to the water tank cover 9 evenly, thereby achieving a good seal between the water tank cover 9 and the contour body 51, creating stable conditions for airtightness testing.

[0034] Preferably, the testing station 2 is equipped with a through-beam sensor 7 for detecting whether the workpiece is placed correctly. This allows for timely detection and adjustment of the water tank cover 9's placement, ensuring the entire testing process is performed in the correct position and improving the accuracy and reliability of the airtightness test.

[0035] Preferably, the testing station 2 is equipped with a qualification marking gun 8. After the airtightness test of the water tank cap 9 of the automotive water heater is performed, once the water tank cap 9 is determined to be qualified, the qualification marking gun 8 automatically marks the water tank cap 9. This rapid marking method can clearly distinguish between qualified products and untested or unqualified products, which facilitates subsequent production process management.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A water tank cap detection device for an automotive hot water heater, characterized in that, The device includes a frame, a testing platform and a vertical clamping assembly mounted on the frame, a tooling base plate mounted on the testing platform, and a contoured body mounted on the tooling base plate and adapted to the shape of the water tank cover. The vertical clamping assembly is used to clamp the water tank cover onto the contoured body. The tooling base plate has a first air passage and a second air passage that are interconnected. The contoured body has a third air passage that is connected to the first and second air passages and is connected to the inner cavity of the water tank cover. The first air passage is connected to an air supply mechanism, and the second air passage is connected to an air pressure detection mechanism. The contoured body, the bottom of the tooling, and the testing platform have clearance holes corresponding to the positions of the mounting holes on the water tank cover. Four through-hole components are provided below the testing platform for detecting whether the mounting holes are through.

2. The water tank cap detection device for an automotive hot water heater according to claim 1, characterized in that, Each of the interlocking components includes a mounting base, a lifting cylinder disposed upward on the mounting base, an insert rod connected to the piston rod of the lifting cylinder, and a magnetic switch disposed on the lifting cylinder.

3. The water tank cap detection device for an automotive hot water heater according to claim 1, characterized in that, The contoured body is provided with a sealing ring that forms a seal at the junction of the water tank cover edge and the contoured body.

4. The water tank cap detection device for an automotive hot water heater according to claim 1, characterized in that, The contoured body is equipped with positioning pins and positioning blocks for positioning the water tank cover.

5. The water tank cap detection device for an automotive hot water heater according to claim 1, characterized in that, The vertical clamping assembly includes a vertically downward-facing pressing cylinder, a top plate connected to the output end of the pressing cylinder, and multiple clamping components disposed at the bottom of the top plate.

6. The water tank cap detection device for an automotive hot water heater according to claim 5, characterized in that, The clamping component includes a guide sleeve, a spring, and a pressure rod. The guide sleeve is disposed on the lower surface of the top plate. The upper part of the pressure rod is slidably disposed inside the guide sleeve. The middle part of the pressure rod is provided with an abutment portion. The spring is sleeved on the pressure rod. The lower end of the spring abuts against the abutment portion, and the upper end of the spring abuts against the lower end of the guide sleeve. The bottom end of the pressure rod is used to press down on the top of the water tank cover.

7. The water tank cap detection device for an automotive hot water heater according to claim 1, characterized in that, The testing platform is equipped with a through-beam sensor for detecting whether the workpiece is placed correctly.

8. The water tank cap detection device for an automotive hot water heater according to claim 1, characterized in that, The testing platform is equipped with qualified marking guns.

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