Hub leak detection device

Abstract

A hub leak detection device comprises a conveying line, a pick-and-place mechanism, a leak detection mechanism, a helium mass spectrometer leak detector and a helium source. The pick-and-place mechanism is arranged between the conveying line and the leak detection mechanism, the leak detection mechanism comprises a leak detection base, a cover and a movable cover, a boss is arranged in the middle of the leak detection base, a first sealing gasket is arranged on the periphery of the bottom of the boss, the cover is arranged above the leak detection base in an up-down moving mode, and a first air suction port is formed in the inner wall of a detection containing cavity of the cover; the first air suction port is connected with the helium mass spectrometer leak detector; a gas inlet is formed in the boss and is communicated with a helium source; and the movable cover can be movably arranged in the cover up and down. According to the utility model, loading and unloading of hubs can be completed rapidly, the detection process is rapid, and the efficiency is high. And the leakage detection cost is greatly reduced by recovering helium, mixing helium and recovering gas.

Description

Technical Field

[0001] This utility model relates to the field of automobile wheel hubs, and in particular to a wheel hub leak detection device. Background Technology

[0002] Microscopic pores or cracks that occur during wheel manufacturing are not visible to the naked eye, but these defects can cause air leakage during wheel use. To improve wheel quality, air leakage testing is necessary after wheel forming. Traditional wheel testing is time-consuming and inefficient, representing a bottleneck in the wheel production line. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a wheel hub leak detection device with high detection efficiency.

[0004] To achieve the above objectives, the technical solution of this utility model is: a wheel hub leak detection device, including a conveyor line, a pick-and-place mechanism, a leak detection mechanism, a helium mass spectrometer leak detector, and a helium gas source;

[0005] The conveyor line is used to transport wheel hubs;

[0006] The pick-and-place mechanism is located between the conveyor line and the leak detection mechanism. The pick-and-place device includes a first base, a lifting seat, and a turntable. The lifting seat can be moved up and down on the first base, and the turntable can be rotated around a vertical axis on the lifting seat. The turntable is equipped with an arm, and the outer end of the arm is equipped with a gripper for holding the wheel hub. Rotating the turntable can move the gripper between the conveyor line and the leak detection mechanism.

[0007] The leak detection mechanism includes a leak detection base, a cover, and a movable cover. The leak detection base has a boss in the middle for mounting a wheel hub. A first sealing gasket is provided on the outer periphery of the bottom of the boss. When the wheel hub is mounted on the boss, the first sealing gasket can abut against the lower end of the wheel hub. The cover can be moved up and down and is positioned above the leak detection base. The cover has a detection cavity inside. The cover can be moved down so that the detection cavity covers the boss with the wheel hub mounted on it. The bottom of the cover can press against the first sealing gasket. The cover has a first air intake on the inner wall of the detection cavity. The first air intake is connected to the helium mass spectrometer leak detection through a first air intake pipe. The boss has an air inlet, which is connected to a helium source. The helium source can input helium-containing gas into the air inlet.

[0008] The movable cover can be moved up and down inside the cover. The bottom of the movable cover is provided with a second sealing gasket. When the movable cover moves down, the second sealing gasket can abut against the upper end of the hub fitted on the boss. The outer periphery of the movable cover is provided with a third sealing gasket to isolate the upper and lower sides of the movable cover.

[0009] The pick-and-place mechanism can transfer wheel hubs from the conveyor line to the leak detection mechanism for leak testing, and can also remove the inspected wheel hubs from the leak detection mechanism and put them back onto the conveyor line for delivery. The bosses on the leak detection base can quickly position the wheel hubs, allowing them to quickly enter the leak detection process. The wheel hub leak detection process is automated and highly efficient.

[0010] Preferably, the conveyor line includes an infeed conveyor line and an outfeed conveyor line. The turntable is equipped with three arms. When the gripper of one arm faces the boss, the grippers on the other two arms face the infeed conveyor line and the outfeed conveyor line, respectively. The grippers on the three arms can respectively hold the wheel hub to be inspected, the wheel hub that has just been inspected, and the wheel hub that was previously inspected. A single leak detection operation can be completed by rotating the gripper arms only 120°, resulting in high efficiency.

[0011] Preferably, the system further includes a first gas tank, a second gas tank, and a third gas tank. The first gas tank contains helium gas, and a second suction port is provided on its protrusion. The second suction port is connected to the second gas tank via a second suction pipe. The first gas tank is connected to the third gas tank via a first pipe. The second gas tank is connected to the third gas tank via a second pipe. The third gas tank is connected to an inlet via a third pipe. The second suction port is used to draw away the helium-containing gas discarded after detection and draw it into the second gas tank. The gas in the third gas tank is formed by mixing the helium gas in the first gas tank and the recovered gas in the second gas tank to create a helium source for leak detection. This improves the utilization rate of helium gas and reduces leak detection costs.

[0012] By adopting the above technical solution, the beneficial effects of this utility model are: this utility model can quickly complete the loading and unloading of wheel hubs, and the detection process is fast and efficient. Moreover, by recovering helium and mixing helium and recovered gas, the cost of leak detection is greatly reduced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the leak detection mechanism of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the first gas tank, the second gas tank, and the third gas tank of this utility model.

[0016] Explanation of key figure labels:

[0017] Conveyor line 1; First base 21; Lifting seat 22; Turntable 23; Arm 231; Gripper 232; Leak detection mechanism 3; Leak detection base 31; First sealing gasket 311; Boss 312; Air inlet 313; Second air intake 314; Cover 32; Detection cavity 321; First air intake 322; Movable cover 33; Inner chamber 34; Outer chamber 35; Helium mass spectrometer leak detector 4; Hub 5; First gas tank 61; Second gas tank 62; Third gas tank 63; First pipeline 71; Second pipeline 72; Third pipeline 73; Second air intake pipeline 82. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1-3 As shown, this utility model discloses a wheel hub leak detection device, including a conveyor line 1, a pick-and-place mechanism, a leak detection mechanism 3, a helium mass spectrometer leak detector 4, a helium source, a first gas tank 61, a second gas tank 62, and a third gas tank 63. The helium source is stored in the third gas tank 63.

[0020] Conveyor line 1 is used to transport wheel hubs. Conveyor line 1 includes a feeding conveyor line and a discharging conveyor line. The feeding conveyor line, the discharging conveyor line, and the leak detection mechanism are arranged in a ring around the outside of the pick-and-place mechanism. Both the feeding conveyor line and the discharging conveyor line consist of a row of rollers.

[0021] The pick-and-place mechanism is located between the conveyor line 1 and the leak detection mechanism 3. The pick-and-place device 1 includes a first base 21, a lifting seat 22, and a turntable 23. The lifting seat 22 is movable up and down on the first base 21, and the turntable 23 is rotatable around a vertical axis on the lifting seat 22. The turntable 23 is equipped with three arms 231, and the outer end of each arm 231 is equipped with a gripper 232 for holding the wheel hub. Rotating the turntable 23 allows the gripper 232 to move between the conveyor line 1 and the leak detection mechanism 3. When the gripper of one arm is facing the boss of the leak detection mechanism, the grippers on the other two arms are facing the feed conveyor line and the discharge conveyor line, respectively.

[0022] like Figure 2 As shown, the leak detection mechanism 3 includes a leak detection base 31, a cover 32, and a movable cover 33. The leak detection base 31 has a boss 312 in the middle for mounting the wheel hub. The wheel hub can be mounted on the boss. The bottom outer periphery of the boss 312 is provided with a first sealing gasket 311. When the wheel hub 5 is mounted on the boss 312, the first sealing gasket 311 can abut against the lower end of the wheel hub 5.

[0023] The cover 32 is movable up and down and positioned above the leak detection base 31. A detection cavity 321 is provided inside the cover 32. The cover 32 can be lowered so that the detection cavity 321 covers the boss 312 with the hub, and the bottom of the cover 32 can press against the first sealing gasket 311. A first air intake port 322 is provided on the inner wall of the detection cavity of the cover 32. The first air intake port 322 is connected to a helium mass spectrometer leak detector via a first air intake pipe. The first air intake pipe can draw gas from the first air intake port and deliver it to the helium mass spectrometer leak detector, which is used to detect the presence of helium in the gas. An air inlet 313 is provided on the boss 312, and the air inlet 313 is connected to a helium source, which can input helium-containing gas into the air inlet.

[0024] The movable cover 33 is movably disposed within the detection cavity 312 of the cover 32. A second sealing gasket 332 is provided at the bottom of the movable cover 33. When the movable cover 33 moves down, the second sealing gasket 332 can abut against the upper end of the hub fitted on the boss. A third sealing gasket 331 is provided on the outer periphery of the movable cover 33 to isolate the upper and lower sides of the movable cover. When the cover 32 moves down to cover the hub, the movable cover 33 moves down to cover the upper part of the hub. The movable cover 33, the cover, and the first sealing gasket form a sealed outer cavity 34 on the outside of the hub, and the movable cover 33 and the boss 312 form a sealed inner cavity 33 on the inside of the hub.

[0025] The first gas tank 61 is filled with helium. The boss 312 is provided with a second air intake 314. The second air intake 314 is connected to the second gas tank 62 through the second air intake pipe 82. The first gas tank 61 is connected to the third gas tank 63 through the first pipe 71. The second gas tank 62 is connected to the third gas tank 63 through the second pipe 72. The third gas tank 63 is connected to the air inlet 313 through the third pipe 73.

[0026] During wheel hub leak detection, the pick-and-place mechanism uses grippers 232 to pick up the wheel hub 5 from the feed conveyor line; rotating the turntable 23, the wheel hub is transferred above the boss 312, and the lowering lifting seat 22 moves down to place the wheel hub 5 onto the boss 312. The grippers on the arm release and leave the leak detection mechanism 3. The cover moves down to cover the wheel hub 5, and the movable cover moves down to press down on the top of the wheel hub 5. The air inlet sprays helium-containing gas into the inner chamber 33, and the first air intake evacuates the outer chamber. The helium mass spectrometer analyzes whether there is helium in the gas in the outer chamber. When helium is detected, it indicates that the wheel hub is leaking; when no helium is detected, it indicates that the wheel hub is not leaking. After the helium mass spectrometer completes the detection, the second air intake evacuates the inner chamber and sends the gas into the second gas tank 62. The movable cover moves upward, the cover moves upward, the hub is released, the grippers of the pick-and-place mechanism pick up the hub, transfer it out of the leak detection mechanism, and transfer the hub to the discharge conveyor line.

[0027] The helium gas in the first gas tank 61 is mixed with the recovered gas in the second gas tank 62 and then sent into the third gas tank 63 to form a helium source.

[0028] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of implementation of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wheel hub leak detection device, characterized in that, Includes a conveyor line, a pick-and-place mechanism, a leak detection mechanism, a helium mass spectrometer leak detector, and a helium source; The conveyor line is used to transport wheel hubs; The pick-and-place mechanism is located between the conveyor line and the leak detection mechanism. The pick-and-place device includes a first base, a lifting seat, and a turntable. The lifting seat can be moved up and down on the first base, and the turntable can be rotated around a vertical axis on the lifting seat. The turntable is equipped with an arm, and the outer end of the arm is equipped with a gripper for holding the wheel hub. Rotating the turntable can move the gripper between the conveyor line and the leak detection mechanism. The leak detection mechanism includes a leak detection base, a cover, and a movable cover. The leak detection base has a boss in the middle for mounting a wheel hub. A first sealing gasket is provided on the outer periphery of the bottom of the boss. When the wheel hub is mounted on the boss, the first sealing gasket can abut against the lower end of the wheel hub. The cover can be moved up and down and is positioned above the leak detection base. The cover has a detection cavity inside. The cover can be moved down so that the detection cavity covers the boss with the wheel hub mounted on it. The bottom of the cover can press against the first sealing gasket. The cover has a first air intake on the inner wall of the detection cavity. The first air intake is connected to the helium mass spectrometer leak detection through a first air intake pipe. The boss has an air inlet, which is connected to a helium source. The helium source can input helium-containing gas into the air inlet. The movable cover can be moved up and down inside the cover. The bottom of the movable cover is provided with a second sealing gasket. When the movable cover moves down, the second sealing gasket can abut against the upper end of the hub fitted on the boss. The outer periphery of the movable cover is provided with a third sealing gasket to isolate the upper and lower sides of the movable cover.

2. The wheel hub leak detection device according to claim 1, characterized in that, The conveyor line includes a feeding conveyor line and a discharging conveyor line. The turntable is equipped with three arms. When the gripper of one arm is facing the boss, the grippers on the other two arms are facing the feeding conveyor line and the discharging conveyor line, respectively.

3. The wheel hub leak detection device according to claim 1, characterized in that, It also includes a first gas tank, a second gas tank, and a third gas tank. The first gas tank is filled with helium, and a second air intake is provided on the protrusion. The second air intake is connected to the second gas tank through a second air intake pipe. The first gas tank is connected to the third gas tank through a first pipe. The second gas tank is connected to the third gas tank through a second pipe. The third gas tank is connected to the air inlet through a third pipe.

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