Wheel rim airtightness detection device

Abstract

The invention relates to the technical field of wheel detection, and discloses a wheel rim airtightness detection device which comprises a workbench, a bottom plate is arranged on the workbench, a top plate is arranged on the bottom plate, a plurality of supporting columns are arranged between the top plate and the bottom plate, a hydraulic cylinder is connected to the top plate, a push plate is arranged below the hydraulic cylinder, and the output end of the hydraulic cylinder is connected with the push plate. An upper mold plate is arranged below the push plate, an upper rubber pad is arranged on the upper mold plate, and a buffer assembly is arranged between the push plate and the upper mold plate; a lower die base is arranged on the bottom plate, a lower rubber pad is arranged on the lower die base, an inflation assembly is arranged on the lower rubber pad, a water storage barrel is arranged on the workbench, the bottom of the water storage barrel is connected with the workbench in a sealed mode, the bottom plate is wrapped in the water storage barrel, and a water circulation assembly is arranged on the edge of the water storage barrel. According to the invention, air tightness detection is carried out through flexible contact, a good sealing detection environment is provided, extrusion damage to a wheel rim is effectively prevented, the detection process is stable and reliable, and cyclic utilization of water resources is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel detection, and particularly to an airtightness detection device for a wheel rim. Background Art

[0002] During the casting process of automobile wheels, sand holes may occur, and gaps are likely to appear during the press riveting process, which are difficult to distinguish with the naked eye. If airtightness detection is not performed, the performance of automobile wheels will not be able to ensure driving safety. Therefore, the airtightness of wheels is an important indicator to measure the performance of wheels and has great significance.

[0003] The sealing structure of traditional airtightness detection equipment for wheel rims has problems of mismatched contact surfaces, resulting in insufficient sealing, and the direct rigid pressing of the hydraulic system is likely to cause damage to the rim surface. Especially for rims made of soft materials such as aluminum alloy, excessive pressing will cause rim deformation or coating peeling.

[0004] Therefore, those skilled in the art urgently need to develop an airtightness detection device for wheel rims. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies in the prior art and provide an airtightness detection device for a wheel rim.

[0006] To achieve the above purpose, the present invention adopts the following technical solution: An airtightness detection device for a wheel rim, including a workbench, a bottom plate is provided on the workbench, a top plate is provided above the bottom plate, a plurality of support columns are provided between the top plate and the bottom plate, a hydraulic cylinder is connected to the top plate, a push plate is provided below the hydraulic cylinder, the output end of the hydraulic cylinder is connected to the push plate, an upper template is provided below the push plate, an upper rubber pad is provided at the bottom of the upper template, and a buffer assembly is provided between the push plate and the upper template;

[0007] A lower die base is provided on the bottom plate, a lower rubber pad is provided on the lower die base, an inflation assembly is provided on the lower rubber pad, a water storage bucket is provided on the workbench, the bottom of the water storage bucket is hermetically connected to the workbench, the water storage bucket wraps the bottom plate inside, and a water circulation assembly is provided on the side of the water storage bucket.

[0008] Preferably, the buffer assembly includes a guide sleeve connected to the push plate, a guide post connected to the upper template is provided below the guide sleeve, the inside of the guide sleeve is a hollow structure, the upper end of the guide post is located inside the guide sleeve, and the guide post and the guide sleeve are slidably connected, and a spring is sleeved outside the guide sleeve and the guide post.

[0009] Preferably, a limit post is further connected to the upper template, the top of the limit post extends out of the push plate and is connected to a limit block, and the limit post and the push plate are slidably connected.

[0010] Preferably, the inflation assembly includes an air outlet pipe connected to the top of the lower rubber pad. An air pump is provided at the bottom of the workbench. The output end of the air pump is connected to an air inlet pipe. The end of the air inlet pipe away from the air pump sequentially passes through the workbench, the bottom plate, the lower die base, and the lower rubber pad and is connected to the air outlet pipe.

[0011] Preferably, the water circulation assembly includes a water tank provided at the bottom of the workbench. The left end of the water tank is communicated with a liquid inlet pipe. The end of the liquid inlet pipe away from the water tank is located above the water storage bucket. A water pump is provided on the liquid inlet pipe. The left end of the water tank is communicated with a liquid outlet pipe. The end of the liquid outlet pipe away from the water tank is connected to the bottom of the water storage bucket. A control valve is provided on the liquid outlet pipe.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] First, in the present invention, both sides of the upper rubber pad and the lower rubber pad adopt an arc structure inclined towards the center to ensure close sealing contact with the wheel rim. When the hydraulic cylinder drives the push plate to move downward, the push plate drives the upper template and the upper rubber pad to descend synchronously through the buffer assembly until the upper rubber pad contacts the wheel rim between the upper and lower rubber pads, providing a good sealing environment for subsequent airtightness detection;

[0014] Second, in the present invention, the limiting column, the guide sleeve, and the guide post work together to accurately limit the movement trajectory of the upper template and the upper rubber pad, enabling them to move only vertically. This design greatly improves the operation precision of the equipment and ensures the stability and reliability of the detection process;

[0015] Third, in the present invention, during the process of the hydraulic cylinder driving the upper template and the upper rubber pad to move downward, when the upper rubber pad contacts the wheel rim, the limiting column drives the limiting block to move upward, compressing the spring. The reverse force generated by the spring acts on the upper template, promoting the closer contact between the upper rubber pad and the wheel rim. This flexible contact method avoids the direct rigid contact between the output end of the hydraulic cylinder and the wheel rim through the upper rubber pad, effectively preventing extrusion damage to the wheel rim;

[0016] Fourth, in the present invention, after starting the air pump, the gas is transported to the inside of the wheel rim through the air inlet pipe and the air outlet pipe to provide a gas source for airtightness detection. Subsequently, water in the water tank is injected into the water storage bucket through the water circulation assembly. By observing whether bubbles are generated around the wheel rim, the airtightness can be visually judged; after the detection is completed, the water pump is turned off and the control valve is opened, and the liquid in the water storage bucket will flow back to the water tank, realizing the recycling of water resources, which not only saves resources but also reduces the operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view structural sectional view of the present invention;

[0018] Figure 2 For Figure 1 the enlarged view of the structure at position A in

[0019] In the figure: 1 - workbench; 2 - top plate; 3 - support column; 4 - hydraulic cylinder; 5 - push plate; 6 - upper template; 7 - upper rubber pad; 8 - lower rubber pad; 9 - lower die base; 10 - bottom plate; 11 - water tank; 12 - air pump; 13 - liquid inlet pipe; 14 - liquid outlet pipe; 15 - air inlet pipe; 16 - water storage bucket; 17 - guide sleeve; 18 - guide post; 19 - spring; 20 - air outlet pipe; 21 - water pump; 22 - limit post; 23 - limit block. Detailed implementation manners

[0020] The present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention and specific embodiments. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] Please refer to Figure 1 - Figure 2, the present invention provides an embodiment: an airtightness detection device for a wheel rim, including a workbench 1, a bottom plate 10 is provided on the workbench 1, a top plate 2 is provided above the bottom plate 10, and a plurality of support columns 3 are provided between the top plate 2 and the bottom plate 10. A hydraulic cylinder 4 is connected to the top plate 2, a push plate 5 is provided below the hydraulic cylinder 4, the output end of the hydraulic cylinder 4 is connected to the push plate 5, an upper template 6 is provided below the push plate 5, and an upper rubber pad 7 is provided at the bottom of the upper template 6. A buffer assembly is provided between the push plate 5 and the upper template 6;

[0024] A lower die base 9 is provided on the bottom plate 10, a lower rubber pad 8 is provided on the lower die base 9, an air inflation assembly is provided on the lower rubber pad 8, a water storage bucket 16 is provided on the workbench 1, and the bottom of the water storage bucket 16 is hermetically connected to the workbench 1. The water storage bucket 16 wraps the bottom plate 10 inside, and a water circulation assembly is provided on the side of the water storage bucket 16.

[0025] Both side surfaces of the upper rubber pad 7 and the lower rubber pad 8 are arc-shaped structures inclined towards the center to ensure sealed contact with the wheel rim. The hydraulic cylinder 4 drives the push plate 5 to move downward, and the push plate 5 drives the upper template 6 and the upper rubber pad 7 to move downward through the buffer assembly and contact the wheel rim of the lower rubber pad 8. Then, the wheel rim is inflated through the air inflation assembly, and water is added to the water storage bucket 16 through the water circulation assembly, and the airtightness is detected by observing the bubble situation.

[0026] Further, the buffer assembly includes a guide sleeve 17 connected to the push plate 5, a guide post 18 connected to the upper template 6 is provided below the guide sleeve 17. The inside of the guide sleeve 17 is a hollow structure, the upper end of the guide post 18 is located inside the guide sleeve 17, and the guide post 18 and the guide sleeve 17 are slidably connected. A spring 19 is sleeved outside the guide sleeve 17 and the guide post 18. A limit post 22 is also connected to the upper template 6, and the top of the limit post 22 extends out of the push plate 5 and is connected to a limit block 23. The limit post 22 and the push plate 5 are slidably connected.

[0027] The limit post 22 and the guide sleeve 17 and the guide post 18 limit the movement of the upper template 6 and the upper rubber pad 7, making them only able to move vertically, improving the accuracy of the equipment; when the hydraulic cylinder 4 drives the upper template 6 and the upper rubber pad 7 to move downward, the upper rubber pad 7 contacts the wheel rim, the limit post 22 drives the limit block 23 to move upward, and at the same time the spring 19 is compressed. The spring 19 acts on the upper template 6 in the reverse direction, making the contact between the upper rubber pad 7 and the wheel rim closer; this device adopts flexible contact, avoiding the output end of the hydraulic cylinder 4 directly making rigid contact with the wheel rim through the upper rubber pad 7 and avoiding squeezing the wheel rim.

[0028] Further, the inflation assembly includes an air outlet pipe 20 connected to the top of the lower rubber pad 8. An air pump 12 is provided at the bottom of the workbench 1. The output end of the air pump 12 is connected to an air inlet pipe 15. One end of the air inlet pipe 15 away from the air pump 12 sequentially passes through the workbench 1, the bottom plate 10, the lower die base 9, the lower rubber pad 8 and is connected to the air outlet pipe 20.

[0029] By starting the air pump 12, the air pump 12 passes gas into the interior of the wheel rim between the upper rubber pad 7 and the lower rubber pad 8 through the air inlet pipe 15 and the air outlet pipe 20, and then subsequent airtightness detection is carried out.

[0030] Further, the water circulation assembly includes a water tank 11 provided at the bottom of the workbench 1. The left end of the water tank 11 is communicated with a liquid inlet pipe 13. One end of the liquid inlet pipe 13 away from the water tank 11 is located above the water storage bucket 16. A water pump 21 is provided on the liquid inlet pipe 13. The left end of the water tank 11 is communicated with a liquid outlet pipe 14. One end of the liquid outlet pipe 14 away from the water tank 11 is connected to the bottom of the water storage bucket 16. A control valve is provided on the liquid outlet pipe 14.

[0031] The water in the water tank 11 is passed into the interior of the water storage bucket 16 by the water pump 21. By observing the bubbles around the wheel rim, the airtightness is detected. After the detection is completed, the water pump 21 is turned off and the control valve is opened, and the liquid flows into the water tank 11 for recycling.

[0032] The working principle of the present invention: When the present invention is in use, the staff starts the hydraulic cylinder 4. When the hydraulic cylinder 4 drives the push plate 5 to move downward, and the push plate 5 drives the upper template 6 and the upper rubber pad 7 to move downward, the upper rubber pad 7 contacts the wheel rim. The limit post 22 drives the limit block 23 to move upward, and at the same time the spring 19 is compressed. The spring 19 acts on the upper template 6 in the reverse direction, making the contact between the upper rubber pad 7 and the wheel rim closer. The water in the water tank 11 is passed into the interior of the water storage bucket 16 by the water pump 21. Then the air pump 12 is started, and the air pump 12 passes gas into the interior of the wheel rim between the upper rubber pad 7 and the lower rubber pad 8 through the air inlet pipe 15 and the air outlet pipe 20, and the airtightness is detected by observing the bubble situation.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An airtightness detection device for a wheel rim, comprising a workbench (1), characterized in that: A base plate (10) is provided on the workbench (1). Above the base plate (10), there is a top plate (2). Between the top plate (2) and the base plate (10), there are multiple support columns (3). A hydraulic cylinder (4) is connected to the top plate (2). Below the hydraulic cylinder (4), there is a push plate (5). The output end of the hydraulic cylinder (4) is connected to the push plate (5). Below the push plate (5), there is an upper template (6). A upper rubber pad (7) is provided at the bottom of the upper template (6). A buffer assembly is provided between the push plate (5) and the upper template (6). A lower die base (9) is provided on the base plate (10). A lower rubber pad (8) is provided on the lower die base (9). An air inflation assembly is provided on the lower rubber pad (8). A water storage bucket (16) is provided on the workbench (1). The bottom of the water storage bucket (16) is hermetically connected to the workbench (1). The water storage bucket (16) wraps the base plate (10) inside. A water circulation assembly is provided on the side of the water storage bucket (16).

2. The airtightness detection device for a wheel rim according to claim 1, characterized in that: The buffer assembly includes a guide sleeve (17) connected to the push plate (5). Below the guide sleeve (17), there is a guide post (18) connected to the upper template (6). The inside of the guide sleeve (17) is a hollow structure. The upper end of the guide post (18) is located inside the guide sleeve (17), and the guide post (18) and the guide sleeve (17) are slidably connected. A spring (19) is sleeved outside the guide sleeve (17) and the guide post (18).

3. The airtightness detection device for a wheel rim according to claim 2, characterized in that: A limit post (22) is further connected to the upper template (6). The top of the limit post (22) extends out of the push plate (5) and is connected to a limit block (23). The limit post (22) and the push plate (5) are slidably connected.

4. The airtightness detection device for a wheel rim according to claim 1, characterized in that: The air inflation assembly includes an air outlet pipe (20) connected to the top of the lower rubber pad (8). An air pump (12) is provided at the bottom of the workbench (1). The output end of the air pump (12) is connected to an air inlet pipe (15). One end of the air inlet pipe (15) away from the air pump (12) sequentially passes through the workbench (1), the base plate (10), the lower die base (9), the lower rubber pad (8) and is connected to the air outlet pipe (20).

5. The airtightness detection device for a wheel rim according to claim 1, wherein: The water circulation assembly includes a water tank (11) provided at the bottom of the workbench (1). The left end of the water tank (11) is connected to a liquid inlet pipe (13). One end of the liquid inlet pipe (13) away from the water tank (11) is located above the water storage bucket (16). A water pump (21) is provided on the liquid inlet pipe (13). The left end of the water tank (11) is connected to a liquid outlet pipe (14). One end of the liquid outlet pipe (14) away from the water tank (11) is connected to the bottom of the water storage bucket (16). A control valve is provided on the liquid outlet pipe (14).

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