Aluminum alloy wheel leak testing equipment

Abstract

The invention discloses an aluminum alloy wheel hub leak test device. When performing a leak test, the wheel hub is first mounted on a clamping air supply mechanism; then, a lifting device is used to drive a water tank to move upward so that the wheel hub is immersed in the water in the water tank; the elastic support mechanism first drives a sealing mechanism to seal the exhaust channel, and after the water tank rises to a set height, a top sleeve directly supports the sealing structure; then, gas is injected through an air inlet joint, and a power device is used to drive a rotating frame to rotate, and whether there is any air leakage outside the water tank is observed to screen out unqualified products and improve the yield; finally, during the downward movement and resetting process of the water tank, the high-pressure gas in the clamping air supply mechanism and the wheel hub pushes open the sealing mechanism, and the internal high-pressure gas is discharged in advance through the exhaust channel for pressure relief, thereby solving the problem that when the rotating frame is detached from the water tank and the clamping air supply mechanism clamps the wheel hub, the internal high-pressure gas blows water on the clamping air supply mechanism outward.

Description

Technical Field

[0001] The invention relates to the technical field of wheel hub processing, in particular to an aluminum alloy wheel hub leak testing device. Background Art

[0002] The wheel hub is an automotive accessory mounted on an axle, supporting the center of the tire. The aluminum alloy wheel manufacturing process includes: melt refining - casting - cap cutting - punching and deburring - heat treatment - shot blasting - finishing - automated drilling - leak testing (air tightness testing) - painting - and packaging. Because aluminum alloy wheels are cast, the casting process can create pinholes that are difficult to detect with the naked eye. Without leak testing (air tightness testing), tires can easily leak after installation, posing a safety hazard.

[0003] Leak testing of aluminum alloy wheels requires the use of aluminum alloy wheel leak testing equipment. For example, the Chinese patent with authorization announcement number CN214040499U and authorization announcement date of August 24, 2021 discloses "A wheel hub air tightness detection device". First, the upper and lower surfaces of the wheel hub are sealed by installing the wheel hub on the fixture, and then the water tank is raised so that the wheel hub is immersed in the water tank. Then, while injecting air, observe whether there are bubbles in the water tank through the glass window of the water tank; finally, after the water tank is reset and the clamping air supply mechanism releases the wheel hub, remove the wheel hub.

[0004] However, at the moment when the clamping air supply mechanism releases the wheel hub, the internal high-pressure gas will leak out from the upper and lower edges of the wheel hub, especially the high-pressure gas leaking from the lower edge, which will cause the water attached to the lower part of the clamping air supply mechanism to splash out, which will not only cause the ground to slip, but also accelerate the rapid drop in the water level in the water tank. Summary of the Invention

[0005] The purpose of the invention is to provide an aluminum alloy wheel hub leak testing device, which has the function of preventing water attached to the clamping air supply mechanism from splashing out of the water tank.

[0006] The above technical objectives of the invention are achieved through the following technical solutions: an aluminum alloy wheel hub leak testing device, including a machine base, a rotating frame rotatably connected to the machine base, a power device arranged between the machine base and the rotating frame and driving the rotating frame to rotate, a clamping air supply mechanism arranged in the rotating frame and used for clamping and sealing the upper and lower end faces of the wheel hub, a water tank that is lifted and lowered on the machine base and can immerse the rotating frame, and a lifting device arranged between the machine base and the water tank, the clamping air supply mechanism includes a fixed clamping sealing seat arranged below the rotating frame, a dynamic clamping sealing seat located above the fixed clamping sealing seat, and a lifting cylinder arranged between the rotating frame and the dynamic clamping sealing seat, and the dynamic clamping sealing seat is provided with a cylinder for clamping and sealing the fixed clamping sealing seat and the dynamic clamping sealing seat. and an air intake joint for injecting air into the cavity between the wheel hub, a through hole is provided at the center of the fixed clamping sealing seat corresponding to the rotating frame, an exhaust channel is provided in the middle of the fixed clamping sealing seat, the exhaust channel is provided with a sealing mechanism which opens the exhaust channel when it drops under the action of gravity and blocks the exhaust channel when it moves upward to an extreme state, the water tank is provided with an elastic supporting mechanism which drives the sealing mechanism to move upward to an extreme state during the upward movement of the water tank, a top sleeve is rotatably connected to the sealing mechanism corresponding to the water tank, which keeps the sealing mechanism in a state of blocking the exhaust channel after the water tank moves to a set height, and when the sealing mechanism is not immersed in the rising process of the water tank, the elastic supporting mechanism has driven the sealing mechanism to move upward to an extreme state.

[0007] By adopting the above solution, when performing a leak test, the wheel hub is first installed on the clamping air supply mechanism; the water tank is then driven upward by the lifting device to immerse the wheel hub in the water in the water tank. When the water in the water tank does not contact the clamping air supply mechanism, the elastic support mechanism first causes the sealing mechanism to seal the exhaust channel to prevent water from entering the exhaust channel. After the water tank rises to a set height, the top sleeve directly supports the sealing structure to prevent the sealing mechanism from being pushed open due to excessive air pressure after gas is injected through the air inlet joint; then, gas is injected through the air inlet joint, and the rotating frame is driven to rotate by the power device. Whether there is any air leakage is observed outside the water tank, unqualified products are screened out, and the yield rate is improved; finally, when the water tank moves downward to reset, the high-pressure gas in the clamping air supply mechanism and the wheel hub pushes open the sealing mechanism, and the internal high-pressure gas is discharged in advance through the exhaust channel for pressure relief, thereby solving the problem that when the clamping air supply mechanism clamps the wheel hub after the rotating frame is separated from the water tank, the internal high-pressure gas will splash water on the clamping air supply mechanism.

[0008] The invention is further configured as follows: a partition with a central square hole is provided in the middle of the exhaust channel, a plurality of exhaust holes are provided in a circumferential array on the partition, the sealing mechanism includes a sealing plate provided in the exhaust channel and located below the partition, a telescopic shaft provided in the middle of the sealing plate and telescopically provided in the central square hole, an anti-slip nut threadedly connected to the upper end of the telescopic shaft and preventing the telescopic shaft from detaching from the partition, and a sealing ring provided on the upper surface edge of the sealing plate; when the sealing plate moves upward to the limit state so that the sealing ring presses against the lower surface of the partition, the sealing plate and the sealing ring seal the plurality of exhaust holes.

[0009] By adopting the above solution, when the sealing plate of the sealing mechanism moves upward to the limit state, the sealing ring presses against the partition to seal the multiple exhaust holes; after the sealing plate of the sealing mechanism moves downward, the high-pressure air can be discharged along the exhaust channel and the exhaust holes of the partition to achieve pressure relief.

[0010] The invention is further configured as follows: a downwardly extending drain pipe is provided in the middle of the water tank, a valve is connected to the lower end of the drain pipe, the elastic support mechanism includes a telescopic tube telescopically arranged in the drain pipe, a pressure ring arranged at the upper end of the limit tube, and a compression spring sleeved on the telescopic tube with both ends pressed between the pressure ring and the bottom of the water tank; when the compression spring is in a natural state, the height of the pressure ring is higher than the water level in the water tank; when the compression spring is in a compressed limit state, the telescopic tube does not interfere with the valve.

[0011] By adopting the above scheme, the elastic support mechanism includes a telescopic tube, a pressure ring and a compression spring, which can drive the sealing mechanism to seal the exhaust channel to prevent water from entering the exhaust channel, and the compression spring will not bend under the support of the telescopic tube; at the same time, the setting of the drain pipe and the valve can realize the discharge of water in the water tank on the one hand, and provide movement space for the telescopic tube of the elastic support mechanism on the other hand.

[0012] The invention is further configured as follows: the top sleeve surrounds the elastic support mechanism, the lower end of the top sleeve is rotatably connected to the water tank through a bearing, the upper end of the top sleeve is provided with an annular limiting gear ring, and the lower surface of the sealing plate is provided with an annular limiting tooth groove matching the annular limiting gear ring.

[0013] By adopting the above solution, after the top sleeve presses against the sealing plate of the sealing mechanism, the lower end of the top sleeve is rotatably connected to the water tank through the bearing, thereby not affecting the rotation of the rotating frame; at the same time, the annular limiting gear ring and the annular limiting tooth groove on the top sleeve can limit the top sleeve and the sealing plate circumferentially, thereby preventing rotation at the junction of the top sleeve and the sealing plate.

[0014] The invention is further configured as follows: a plurality of blades are distributed in a circumferential array on the circumferential side of the top sleeve, a downwardly recessed annular groove is provided at the edge of the bottom of the water tank, a plurality of flow pipes connected to the drain pipe are provided at the bottom of the annular groove, and a circulation filtration device connected to the lower end of the drain pipe and realizing the transportation of filtered water into the water tank is also included. The circulation filtration device includes a filter, a water inlet hose connecting the valve and the filter, a water outlet hose connecting the filter and the upper end of the water tank, and a water pump arranged in the middle of the water outlet hose.

[0015] By adopting the above solution, some metal powder will adhere to the surface of the wheel hub after machining, so the water in the water tank is filtered through the circulating filtration system; at the same time, when the top sleeve rotates with the rotating frame, the blades can stir the water at the bottom of the water tank, so that the metal powder deposited at the bottom of the water tank enters the annular groove under the action of the water flow, and is discharged through the circulation pipe and the drain pipe during the circulation process, thereby improving the filtering effect of the metal powder in the water tank.

[0016] The invention is further configured as follows: the rotating frame includes a base frame rotatably connected to the machine base, an articulated frame with an upper end hinged on the base frame and provided with the through hole, a counterweight block arranged on the front side of the articulated frame and causing the articulated frame to rotate and tilt toward the rear side when the wheel hub is installed, and the clamping air supply mechanism is arranged in the articulated frame; a guiding mechanism is provided between the two sides of the water tank and the articulated frame, which drives the articulated frame to gradually rotate to a vertical state and then descend during the rising process of the water tank. When the elastic support mechanism is in contact with the sealing ring, the articulated frame is already in a vertical state under the action of the guiding mechanism, and the inner diameter of the through hole matches the maximum outer diameter of the top sleeve. After the top sleeve enters the through hole as the water tank moves upward and does not contact the sealing plate, the guiding mechanism between the water tank and the articulated frame is disengaged to avoid interfering with the subsequent rotation of the rotating frame.

[0017] By adopting the above scheme, the articulated frame rotates to an inclined state under the action of the counterweight block, which makes it convenient to install the wheel hub on the clamping air supply mechanism, and in the process of removing the wheel hub, it is convenient to make the water on the clamping air supply mechanism flow efficiently into the water tank in an inclined state; at the same time, the setting of the guide mechanism can gradually make the articulated frame in a vertical state during the upward movement of the water tank, and when the guide mechanism is disengaged, the outer diameter of the top sleeve and the inner diameter of the through hole at the top of the articulated frame match, so that the rotating frame can maintain a vertical state and solve the problem of the guide mechanism interfering with the rotation of the rotating frame.

[0018] The invention is further configured as follows: the guide mechanism includes a vertical guide rail arranged on one side of the water tank, an inclined open guide rail arranged on the vertical guide rail, and a guide shaft arranged on the lower side of the articulated frame and extending radially thereof; during the upward movement of the water tank, the inclined open guide rail drives the guide shaft to move and adjust its position so that the articulated frame gradually rotates to a vertical state; the vertical guide rail limits the guide shaft so that the articulated frame remains in a vertical state; and the lower part of the vertical guide rail is open.

[0019] By adopting the above solution, during the upward movement of the water tank, the inclined open guide rail drives the guide shaft to move and adjust its position, so that the articulated frame gradually rotates to a vertical state, and the vertical guide rail limits the guide shaft so that the articulated frame remains in a vertical state; at the same time, the lower part of the vertical guide rail is opened, which facilitates the guide shaft to enter the vertical guide cabinet during the downward movement of the water tank; at the same time, when designing the guide mechanism, it is necessary to pay attention to the number of rotations of the rotating frame being an integer, so that the guide shaft can be aligned with the vertical guide rail.

[0020] The invention is further configured as follows: the water tank is provided with a plurality of glass observation windows on its periphery.

[0021] By adopting the above solution, multiple glass observation windows are provided on the sides of the water tank, making it convenient to observe whether there is air leakage in the wheel hub through the glass observation windows during the leak test, thereby improving the accuracy of the leak test and improving the yield of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural diagram of Example 1;

[0023] Figure 2 It is a schematic diagram of the partial structure of the rotating frame and the fixed clamping seal seat in Example 1;

[0024] Figure 3 It is a structural diagram of the water tank in Example 1;

[0025] Figure 4 is a schematic diagram of the partial structure between the sealing mechanism and the top sleeve in Example 1;

[0026] Figure 5 This is a schematic diagram of the partial structure of the water tank after it moves upward to a set position in Example 1;

[0027] Figure 6 It is a schematic diagram of the partial structure of the rotating frame and water tank in Example 2.

[0028] Figure numerals: 1, machine base; 2, rotating frame; 21, base frame; 22, articulated frame; 23, counterweight; 24, through hole; 3, power unit; 4, clamping air supply mechanism; 41, fixed clamping seal seat; 411, exhaust channel; 42, dynamic clamping seal seat; 43, lifting cylinder; 44, air inlet joint; 45, partition; 451, central square hole; 452, exhaust hole; 5, water tank; 51, drain pipe; 52, valve; 53, annular groove; 54, circulation pipe; 55, glass observation window; 6, lifting device; 7, sealing machine Structure; 71. Sealing plate; 711. Annular limit tooth groove; 72. Telescopic shaft; 73. Anti-slip nut; 74. Sealing ring; 8. Elastic support mechanism; 81. Telescopic tube; 82. Pressure ring; 83. Compression spring; 9. Top sleeve; 91. Bearing; 92. Annular limit gear ring; 93. Blade; 10. Circulating filter device; 101. Filter; 102. Water inlet hose; 103. Water outlet hose; 104. Water pump; 11. Guide mechanism; 111. Vertical guide rail; 112. Inclined opening guide rail; 113. Guide shaft. DETAILED DESCRIPTION

[0029] The invention will be further described in detail below with reference to the accompanying drawings.

[0030] Example 1: An aluminum alloy wheel hub leak test device, such as Figure 1 As shown, the apparatus comprises a base 1, a turret 2 rotatably connected to the base 1, a power unit 3 disposed between the base 1 and the turret 2 and driving the rotation of the turret 2, a clamping air supply mechanism 4 disposed within the turret 2 and used to clamp and seal the upper and lower end surfaces of the wheel hub, a water tank 5 that is lifted and lowered on the base 1 and allows the turret 2 to be immersed therein, and a lifting device 6 disposed between the base 1 and the water tank 5. The clamping air supply mechanism 4 comprises a fixed clamping seal seat 41 disposed below the turret 2, a dynamic clamping seal seat 42 located above the fixed clamping seal seat 41, and a lifting cylinder 43 disposed between the turret 2 and the dynamic clamping seal seat 42. The dynamic clamping seal seat 42 is provided with an air inlet connector 44 for injecting air into the cavity between the fixed clamping seal seat 41, the dynamic clamping seal seat 42, and the wheel hub. Rubber pads (not labeled in the figure) are bonded to the adjacent surfaces of the fixed clamping seal seat 41 and the dynamic clamping seal seat 42.

[0031] like Figure 1 、 Figure 2 and Figure 5As shown, a through hole 24 is provided at the center of the fixed clamping sealing seat 41 corresponding to the rotating frame 2, an exhaust channel 411 is provided in the middle of the fixed clamping sealing seat 41, and a sealing mechanism 7 is provided on the exhaust channel 411 for opening the exhaust channel 411 when it drops under the action of gravity and blocking the exhaust channel 411 when it moves upward to the limit state. An elastic supporting mechanism 8 is provided on the water tank 5 for driving the sealing mechanism 7 to move upward to the limit state during the upward movement of the water tank 5. The water tank 5 is rotatably connected to the sealing mechanism 7 corresponding to the sealing mechanism 7, which keeps the sealing mechanism 7 in the state of blocking the exhaust channel 411 after the water tank 5 moves to a set height. When the sealing mechanism 7 is not immersed in the rising process of the water tank 5, the elastic supporting mechanism 8 has driven the sealing mechanism 7 to move upward to the limit state, and the inner diameter of the through hole 24 matches the maximum outer diameter of the top sleeve 9.

[0032] like Figure 1 and Figure 2 As shown, a baffle 45 with a central square hole 451 is provided in the middle of the exhaust passage 411. A plurality of exhaust holes 452 are arranged in a circumferential array on the baffle 45. The sealing mechanism 7 includes a sealing plate 71 disposed within the exhaust passage 411 and below the baffle 45; a telescopic shaft 72 disposed in the middle of the sealing plate 71 and telescopically arranged within the central square hole 451; a locking nut 73 threadedly connected to the upper end of the telescopic shaft 72 to prevent the telescopic shaft 72 from separating from the baffle 45; and a sealing ring 74 disposed on the edge of the upper surface of the sealing plate 71. The sealing ring 74 is provided with an inner and outer ring. When the sealing plate 71 moves upward to its limit, so that the sealing ring 74 abuts against the lower surface of the baffle 45, the sealing plate 71 and the sealing ring 74 seal the plurality of exhaust holes 452.

[0033] like Figure 1 、 Figure 3 and Figure 5 As shown, a downward-extending drain pipe 51 is located in the middle of the water tank 5, with a valve 52 connected to its lower end. The elastic support mechanism 8 comprises a telescopic tube 81 that is telescopically positioned within the drain pipe 51, a pressure ring 82 disposed at the upper end of the stop tube, and a compression spring 83 that fits over the telescopic tube 81, with both ends abutting between the pressure ring 82 and the bottom of the water tank 5. When the compression spring 83 is in its neutral position, the pressure ring 82 is above the water level in the water tank 5. When the compression spring 83 is in its ultimate compressed state, the telescopic tube 81 does not interfere with the valve 52. Furthermore, a plurality of glass observation windows 55 are located around the perimeter of the water tank 5.

[0034] like Figures 1 to 4As shown, a top sleeve 9 surrounds the elastic support mechanism 8. The lower end of the top sleeve 9 is rotatably connected to the water tank 5 via a bearing 91. An annular retaining gear ring 92 is provided at the upper end of the top sleeve 9, and an annular retaining tooth groove 711 is provided on the lower surface of the sealing plate 71 to match the annular retaining gear ring 92. A plurality of blades 93 are arranged in a circumferential array around the circumference of the top sleeve 9. A downwardly concave annular groove 53 is provided at the bottom edge of the water tank 5. A plurality of flow pipes 54 are provided at the bottom of the annular groove 53, which are connected to the drain pipe 51. A circulating filter device 10 is also included, which is connected to the lower end of the drain pipe 51 and delivers filtered water to the water tank 5. The circulating filter device 10 includes a filter 101, a water inlet hose 102 connecting the valve 52 and the filter 101, a water inlet hose 102 connecting the filter 101 and the upper end of the water tank 5, and a water pump 104 located in the middle of the water outlet hose 103.

[0035] Implementation effect: When performing a leak test, the wheel hub is first installed on the clamping air supply mechanism 4; then the water tank 5 is driven upward by the lifting device 6 to immerse the wheel hub in the water in the water tank 5. When the water in the water tank 5 does not contact the clamping air supply mechanism 4, the elastic support mechanism 8 first causes the sealing mechanism 7 to seal the exhaust channel 411 to prevent water from entering the exhaust channel 411, and after the water tank 5 rises to the set height, the top sleeve 9 directly supports the sealing structure to prevent the sealing mechanism 7 from being pushed open due to excessive air pressure after gas is injected through the air inlet joint 44; then the air inlet joint 44 is opened. The head 44 injects gas, cooperates with the power device 3 to drive the rotating frame 2 to rotate, and observes whether there is any air leakage outside the water tank 5, screens out unqualified products, and improves the yield rate; finally, when the water tank 5 moves downward and resets, the high-pressure gas in the clamping air supply mechanism 4 and the wheel hub pushes open the sealing mechanism 7, and the internal high-pressure gas is discharged in advance through the exhaust channel 411 for pressure relief, which solves the problem that when the rotating frame 2 is separated from the water tank 5, the clamping air supply mechanism 4 clamps the wheel hub, and the internal high-pressure gas blows the water on the clamping air supply mechanism 4 out.

[0036] When the sealing plate 71 of the sealing mechanism 7 moves upward to its limit, the sealing ring 74 presses against the partition 45 to seal the multiple exhaust holes 452. After the sealing plate 71 of the sealing mechanism 7 moves downward, the high-pressure air can be discharged through the exhaust channel 411 and the exhaust holes 452 of the partition 45, thereby achieving pressure relief. The elastic support mechanism 8 includes a telescopic tube 81, a pressure ring 82, and a compression spring 83, which can drive the sealing mechanism 7 to seal the exhaust channel 411 to prevent water from entering the exhaust channel 411. The compression spring 83 will not bend under the support of the telescopic tube 81. At the same time, the arrangement of the drain pipe 51 and the valve 52 can achieve the purpose of draining water from the water tank 5 on the one hand, and provide space for the telescopic tube 81 of the elastic support mechanism 8 to move on the other hand. After the top sleeve 9 presses against the sealing plate 71 of the sealing mechanism 7, the lower end of the top sleeve 9 is rotatably connected to the water tank 5 via the bearing 91, thereby not affecting the rotation of the rotating frame 2. At the same time, the annular limiting gear ring 92 and the annular limiting tooth groove 711 on the top sleeve 9 can circumferentially limit the top sleeve 9 and the sealing plate 71, preventing rotation at the junction of the top sleeve 9 and the sealing plate 71. Because the wheel hub has some metal powder attached to its machined surface, the water in the water tank 5 is filtered through a circulating filtration system. At the same time, as the top sleeve 9 rotates with the rotating frame 2, the blades 93 can stir the water at the bottom of the water tank 5, so that the metal powder deposited at the bottom of the water tank 5 enters the annular groove 53 under the action of the water flow, and is discharged through the circulation pipe 54 and the drain pipe 51 during the circulation process, thereby improving the filtering effect of the metal powder in the water tank 5.

[0037] Example 2: An aluminum alloy wheel hub leak test device, such as Figure 1 、 Figure 5 and Figure 6 As shown, the difference from Example 1 is that the rotating frame 2 includes a base frame 21 rotatably connected to the machine base 1, an articulated frame 22 with a through hole 24 hinged at its upper end to the base frame 21, a counterweight 23 disposed on the front side of the articulated frame 22 to cause the articulated frame 22 to rotate and tilt toward the rear side when the wheel hub is installed, and the clamping air supply mechanism 4 is disposed within the articulated frame 22. Guide mechanisms 11 are disposed on both sides of the water tank 5 and between the articulated frame 22 to drive the articulated frame 22 to gradually rotate to a vertical position during the ascent of the water tank 5 and then descend. When the elastic support mechanism 8 is in contact with the sealing ring 74, the articulated frame 22 is already in a vertical position under the action of the guide mechanisms 11. After the top sleeve 9 moves upward with the water tank 5 into the through hole 24 and does not contact the sealing plate 71, the guide mechanisms 11 between the water tank 5 and the articulated frame 22 are disengaged to avoid interfering with the subsequent rotation of the rotating frame 2.

[0038] like Figure 6As shown, the guide mechanism 11 includes a vertical guide rail 111 disposed on one side of the water tank 5, an inclined open guide rail 112 disposed on the vertical guide rail 111, and a guide shaft 113 disposed on the lower side of the articulated frame 22 and extending radially therefrom. During the upward movement of the water tank 5, the inclined open guide rail 112 drives the guide shaft 113 to move and adjust its position, causing the articulated frame 22 to gradually rotate to a vertical position. The vertical guide rail 111 limits the guide shaft 113 to maintain the articulated frame 22 in the vertical position. The connection point between the vertical guide rail 11 and the inclined open guide rail 112 is higher than the highest point of the elastic support mechanism 8 in its natural state, ensuring that the articulated frame 22 is already in the vertical position under the action of the guide mechanism 11 when the elastic support mechanism 8 is in contact with the sealing ring 74. Furthermore, the lower portion of the vertical guide rail 111 is open.

[0039] Implementation effect: The articulated frame 22 rotates to an inclined state under the action of the counterweight 23, which makes it convenient to install the wheel hub on the clamping air supply mechanism 4, and in the process of removing the wheel hub, it is convenient to make the water on the clamping air supply mechanism 4 flow into the water tank 5 efficiently in the inclined state; at the same time, the setting of the guide mechanism 11 can gradually make the articulated frame 22 in a vertical state during the upward movement of the water tank 5, and when the guide mechanism 11 is disengaged, the outer diameter of the top sleeve 9 matches the inner diameter of the through hole 24 at the top of the articulated frame 22, which can keep the rotating frame 2 in a vertical state and solve the problem of the guide mechanism 11 interfering with the rotation of the rotating frame 2

[0040] This specific embodiment is merely an explanation of the invention and is not a limitation of the invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as they are within the scope of the claims of the invention, they are protected by patent law.

Claims

1. An aluminum alloy wheel hub leak test device, comprising a base (1), a rotating frame (2) rotatably connected to the base (1), a power device (3) disposed between the base (1) and the rotating frame (2) and driving the rotating frame (2) to rotate, a clamping air supply mechanism (4) disposed in the rotating frame (2) and used for clamping and sealing the upper and lower end surfaces of the wheel hub, a water tank (5) disposed on the base (1) and capable of being immersed in the water tank (2), and a lifting device disposed between the base (1) and the water tank (5). (6), the clamping air supply mechanism (4) comprises a fixed clamping seal seat (41) arranged below the rotating frame (2), a dynamic clamping seal seat (42) located above the fixed clamping seal seat (41), and a lifting cylinder (43) arranged between the rotating frame (2) and the dynamic clamping seal seat (42), and the dynamic clamping seal seat (42) is provided with an air inlet joint (44) for injecting air into the cavity between the fixed clamping seal seat (41), the dynamic clamping seal seat (42) and the wheel hub, characterized in that: The rotating frame (2) is provided with a through hole (24) at the center of the fixed clamping sealing seat (41), and the fixed clamping sealing seat (41) is provided with an exhaust channel (411) in the middle. The exhaust channel (411) is provided with a sealing mechanism (7) that opens the exhaust channel (411) when it is drooping under the action of gravity and blocks the exhaust channel (411) when it moves upward to an extreme state. The water tank (5) is provided with an elastic support mechanism (8) that drives the sealing mechanism (7) to move upward to an extreme state during the upward movement of the water tank (5). The water tank (5) is rotatably connected to the sealing mechanism (7) at the corresponding position of the sealing mechanism (7), which keeps the sealing mechanism (7) in a state of blocking the exhaust channel (411) after the water tank (5) moves to a set height. When the sealing mechanism (7) is not immersed in the water tank (5) during the upward movement, the elastic support mechanism (8) has already driven the sealing mechanism (7) to move upward to an extreme state.

2. The aluminum alloy wheel hub leak test equipment according to claim 1, characterized in that: A partition (45) having a central square hole (451) is provided in the middle of the exhaust channel (411), and a plurality of exhaust holes (452) are provided in a circumferential array on the partition (45). The sealing mechanism (7) comprises a sealing plate (71) provided in the exhaust channel (411) and located below the partition (45), a telescopic shaft (72) provided in the middle of the sealing plate (71) and telescopically provided in the central square hole (451), an anti-slip nut (73) threadedly connected to the upper end of the telescopic shaft (72) and preventing the telescopic shaft (72) from detaching from the partition (45), and a sealing ring (74) provided on the edge of the upper surface of the sealing plate (71). When the sealing plate (71) moves upward to an extreme state so that the sealing ring (74) is pressed against the lower surface of the partition (45), the sealing plate (71) and the sealing ring (74) seal the plurality of exhaust holes (452).

3. The aluminum alloy wheel hub leak test equipment according to claim 2, characterized in that: A downwardly extending drain pipe (51) is provided in the middle of the water tank (5), and a valve (52) is connected to the lower end of the drain pipe (51). The elastic support mechanism (8) comprises a telescopic tube (81) telescopically arranged in the drain pipe (51), a pressure ring (82) arranged at the upper end of the limit tube, and a compression spring (83) sleeved on the telescopic tube (81) with both ends pressed against the pressure ring (82) and the bottom of the water tank (5). When the compression spring (83) is in a natural state, the height of the pressure ring (82) is higher than the water level in the water tank (5). When the compression spring (83) is in a compressed limit state, the telescopic tube (81) does not interfere with the valve (52).

4. The aluminum alloy wheel hub leak test equipment according to claim 3, characterized in that: The top sleeve (9) surrounds the elastic support mechanism (8), and the lower end of the top sleeve (9) is rotatably connected to the water tank (5) through a bearing (91). The upper end of the top sleeve (9) is provided with an annular limiting gear ring (92), and the lower surface of the sealing plate (71) is provided with an annular limiting tooth groove (711) matching the annular limiting gear ring (92).

5. The aluminum alloy wheel hub leak test equipment according to claim 4, characterized in that: A plurality of blades (93) are distributed in a circumferential array around the circumference of the top sleeve (9), a downwardly concave annular groove (53) is provided on the edge of the bottom of the water tank (5), a plurality of flow pipes (54) connected to the drain pipe (51) are provided at the bottom of the annular groove (53), and a circulation filter device (10) connected to the lower end of the drain pipe (51) and capable of transporting filtered water into the water tank (5) is also included. The circulation filter device (10) includes a filter (101), a water inlet hose (102) connecting the valve (52) and the filter (101), a water outlet hose (103) connecting the filter (101) and the upper end of the water tank (5), and a water pump (104) arranged in the middle of the water outlet hose (103).

6. The aluminum alloy wheel hub leak test equipment according to claim 5, characterized in that: The rotating frame (2) comprises a base frame (21) rotatably connected to the machine base (1), an articulated frame (22) whose upper end is hinged to the base frame (21) and provided with the through hole (24), and a counterweight (23) arranged at the front side of the articulated frame (22) and causing the articulated frame (22) to rotate and tilt toward the rear side when the wheel hub is installed. The clamping air supply mechanism (4) is arranged in the articulated frame (22); and a mechanism is provided between the two sides of the water tank (5) and the articulated frame (22) to drive the articulated frame (22) to gradually rotate to a vertical state during the rising process of the water tank (5). The descending guide mechanism (11) is in a state where the elastic support mechanism (8) is in contact with the sealing ring (74). The articulated frame (22) is in a vertical state under the action of the guide mechanism (11). The inner diameter of the through hole (24) matches the maximum outer diameter of the top sleeve (9). After the top sleeve (9) moves upward with the water tank (5) into the through hole (24) and does not contact the sealing plate (71), the guide mechanism (11) between the water tank (5) and the articulated frame (22) is disengaged to avoid interfering with the subsequent rotation of the rotating frame (2).

7. The aluminum alloy wheel hub leak test equipment according to claim 6, characterized in that: The guide mechanism (11) comprises a vertical guide rail (111) arranged on one side of the water tank (5), an inclined open guide rail (112) arranged on the vertical guide rail (111), and a guide shaft (113) arranged on the lower side of the articulated frame (22) and extending along its radial direction. During the upward movement of the water tank (5), the inclined open guide rail (112) drives the guide shaft (113) to move and adjust its position, so that the articulated frame (22) gradually rotates to a vertical state. The vertical guide rail (111) limits the guide shaft (113) so that the articulated frame (22) remains in a vertical state. The lower part of the vertical guide rail (111) is open.

8. The aluminum alloy wheel hub leak test equipment according to claim 1, characterized in that: The water tank (5) has a plurality of glass observation windows (55) on its circumference.

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