Hub air tightness detection device

Abstract

The utility model belongs to the technical field of hub processing and manufacturing, and particularly relates to a hub air tightness detection device. A hub air tightness detection device comprises a frame body, a pressing mechanism and a rotary driver, the pressing mechanism comprises a pressing driver, an upper pressing plate and a lower pressing plate, the pressing driver is used for driving the upper pressing plate to press downwards, the pressing mechanism is matched with a rotary joint and a gas channel block, the rotary joint comprises a rotary part and a fixed part, and the fixed part is matched with the rotary joint. The gas channel block, the rotating part and the pressing mechanism synchronously rotate along the same rotating axis; the fixed part, the movable part, the gas channel block and the upper pressing plate are each provided with a gas passing channel, the gas passing channel of the movable part is communicated with the gas passing channel of the gas channel block through a gas outlet pipe, and the gas passing channel of the gas channel block is communicated with the gas passing channel of the upper pressing plate through a hose. The length of the hose is larger than the maximum lifting stroke of the pressing driver. The utility model has the advantages that the gas pipeline is optimized, and the gas pipe is prevented from winding.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheel hub processing and manufacturing, and particularly relates to a wheel hub air tightness detection device. Background Art

[0002] The wheel hub needs to be tested for air tightness of the inner cavity before leaving the factory. The method for testing the air tightness of the wheel hub is generally a water tank air tightness test. The specific method of the water tank air tightness test is to press the axial ends of the wheel hub with the upper and lower pressure plates, then pass the gas into the inner cavity of the wheel hub, and then put the wheel hub into the water tank. The operator observes whether bubbles are generated around the wheel hub to determine whether the air tightness of the wheel hub is good. In order for the operator to judge whether the air tightness of the wheel hub meets the standard, the wheel hub needs to be rotated 360° to observe the air tightness of each circumferential position of the wheel hub.

[0003] A Chinese patent with application number 202121877272.1 discloses a wheel hub air tightness detection tool, including a water tank and a clamping mechanism, wherein the clamping mechanism includes an upper pressure plate and a lower pressure plate, an upper pressure pad is installed on the lower side of the upper pressure plate, and the upper pressure plate is connected to a first lifting mechanism, the lower pressure plate is located on the lower side of the upper pressure pad, and a lower pressure pad is installed on its upper side, and the outer periphery of the lower pressure plate is connected to a connecting plate through a vertically upward connecting column, and the connecting plate is connected to a rotating mechanism, and an air intake pipe passes through the upper pressure plate and the upper pressure pad to inflate the inside of the wheel hub; the water tank is arranged on the lower side of the lower pressure plate, and is connected to a second lifting mechanism. A top platform is arranged on the upper side of the connecting plate, and the air intake pipe is introduced from the top platform, and the inside of the wheel hub is inflated through the upper pressure plate and the upper pressure pad; the rotating motor is fixed on the top platform, and the output shaft of the rotating motor is connected to the top of the connecting plate.

[0004] In the above scheme, the air pipe inflates the inside of the wheel hub, the rotating motor drives the connecting plate to rotate horizontally 360 degrees, the connecting plate drives the lower pressure plate to rotate through the connecting column, and the wheel hub rotates in the water following the upper and lower pressure plates. However, the obvious defect of this scheme is that the air pipe passes downward through the connecting plate, the upper pressure plate and the upper pressure pad. When the connecting plate, the upper pressure plate and the upper pressure pad rotate, the air pipe will also be driven and rotate 360 ​​degrees accordingly, but the tail of the air pipe is usually connected to the air pump, and the tail of the air pipe cannot be moved. Even if the air pipe is a long hose, the above scheme will cause the hose to get entangled when it rotates with the connecting plate and the upper pressure plate, thus posing a safety hazard. Utility Model Content

[0005] The utility model aims to provide a wheel hub air tightness detection device which optimizes the gas pipeline and avoids the winding of the gas pipeline.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hub air tightness detection device, comprising a frame, a clamping mechanism, and a rotary driver for making the clamping mechanism rotate, the rotary driver is fixed to the top plate of the frame, the clamping mechanism is rotatably connected to the frame and comprises a clamping driver, an upper pressing plate and a lower pressing plate, the clamping driver is used to drive the upper pressing plate to press downward, the clamping mechanism is equipped with a rotary joint and a gas channel block, the rotary joint comprises a rotating part, a fixed part fixed to the frame, the gas channel block passes downward through the top plate and is rotatably connected to the top plate, the gas channel block, the rotating part and the clamping mechanism rotate synchronously along the same rotation axis; the fixed part, the movable part, the gas channel block and the upper pressing plate are all provided with an air passage, the air passage of the fixed part is connected to the air passage of the movable part, and the fixed part and the rotating part are dynamically sealed, the air passage of the movable part is connected to the air passage of the gas channel block through an air outlet pipe, the air passage of the gas channel block is connected to the air passage of the upper pressing plate through a hose, and the length of the hose is greater than the maximum lifting stroke of the clamping driver.

[0007] When measuring the air tightness of the wheel hub, the operator places the wheel hub between the upper pressure plate and the lower pressure plate, and then the clamping driver presses the upper pressure plate downward, so that the upper pressure plate moves downward and the wheel hub is clamped between the upper pressure plate and the lower pressure plate. Then the gas from the air pump flows into the fixed part of the rotary joint, and the gas flows out from the rotating part of the rotary joint, enters the air passage of the gas channel block through the air outlet pipe, and then the gas enters the air passage of the upper pressure plate through the hose, and finally enters the inner cavity of the wheel hub, and then the wheel hub is immersed in the water tank, and the rotary driver drives the clamping mechanism to rotate, so that the wheel hub rotates 360°. When the clamping mechanism rotates, the fixed part of the rotary joint will not rotate, so the pipeline connected to the air pump will not rotate, and the air outlet pipe will rotate together with the rotating part of the rotary joint and the gas channel block, so the air outlet pipe will not be entangled. The hose rotates together with the gas channel block and the upper pressure plate, so the hose will not be entangled. The wheel hub is immersed in the water tank by using an existing oil cylinder to push the water tank upwards, so that the height of the water tank rises and the wheel hub is immersed in the water tank.

[0008] The utility model fixes the pipe connected to the air pump by fixing the fixing part of the rotary joint. The rotating part of the rotary joint, the gas channel block and the clamping mechanism rotate synchronously along the same rotating axis, thereby avoiding the possibility of the outlet pipe and the hose being entangled, and improving safety. In addition, the gas channel block passes through the top plate of the frame downward, and the outlet pipe is completely out of contact with the top plate of the frame, so that the gas flows through the gas passage of the gas channel block, avoiding the outlet pipe from being entangled, thereby optimizing the gas pipeline and avoiding the entanglement of the air pipe.

[0009] The length of the hose being greater than the maximum lifting stroke of the clamping driver refers to the maximum lifting stroke of the clamping driver when the clamping driver is pressed downward.

[0010] Preferably, a gas transmission ring is fixedly arranged on the outer surface of the gas channel block, an opening connected to the gas passage is provided on the surface of the gas channel block, an annular or arc-shaped gas groove is provided on the inner wall of the gas transmission ring, the gas groove is located circumferentially outside the opening and connected to the opening, and the gas groove of the gas transmission ring is connected to the gas passage of the rotating part through the gas outlet pipe.

[0011] By setting up a gas transmission ring, a ring-shaped or arc-shaped gas groove is provided on the gas transmission ring. When the gas outlet pipe is assembled and connected with the gas transmission ring, the gas transmission ring can be adjusted in the circumferential direction so that the gas outlet pipe is connected with the gas inlet hole of the gas transmission ring, so that there is no need to consider whether the gas outlet pipe is completely aligned with the gas passage of the gas passage block and whether they are on the same axis, which facilitates the connection between the gas outlet pipe and the gas passage of the gas passage block and can adapt to special scenarios.

[0012] Preferably, the gas channel block is sleeved outside the lifting rod of the clamping driver, the length of the hose is greater than the maximum lifting stroke of the lifting rod, and the lifting rod is fixed to the upper pressure plate.

[0013] The gas channel block is directly sleeved outside the lifting rod of the pressing driver, and the lifting rod and the gas channel block are slidably matched, so that the structure of the device is more compact.

[0014] Preferably, the gas channel block is fixed to the housing of the clamping driver, the gas channel block is located at the lower end of the clamping driver, and the gas channel block is rotatably connected to the top plate via a bearing.

[0015] The rotational connection between the gas channel block and the top plate is achieved through the bearing, thereby achieving the rotational connection between the pressing drive and the top plate.

[0016] Preferably, the clamping driver is rotationally connected to the top plate, and a gear ring coaxial with the rotation axis of the clamping driver is provided on the housing of the clamping driver, and the gear ring is used to receive the torque transmitted from the output end of the rotation driver.

[0017] By arranging a gear ring on the housing of the clamping driver, the rotation of the clamping driver is realized by meshing the output end of the rotary driver with the gear ring, thereby utilizing the lateral space and making the structure of the device more compact.

[0018] Preferably, the gear ring is provided with a through hole penetrating up and down for the outlet pipe to pass through, one end of the outlet pipe is connected to the rotating part, and the other end of the outlet pipe is directly or indirectly connected to the air passage of the gas passage block.

[0019] The air outlet pipe passes through the through hole of the gear ring and is directly or indirectly connected to the air passage, so that the air outlet pipe is prevented from being located outside the gear ring, thereby preventing the air outlet pipe from being crushed by the gear ring and the output end of the rotary drive. At the same time, the through hole can also limit the position of the air outlet pipe so that the air outlet pipe will not move.

[0020] Preferably, the clamping driver is an air cylinder or an oil cylinder, the fixed part of the rotary joint is connected with an inlet pressure pipe for air or oil intake, the rotating part is provided with an outlet pressure pipe, and the other end of the outlet pressure pipe supplies air or oil to the clamping driver.

[0021] In order to ensure the clamping force and service life, usually, a pneumatic cylinder or an oil cylinder is used as the clamping driver instead of an electric push rod. At the same time, the rotary joint can also separate the gas or oil circuit of the pneumatic cylinder or the oil cylinder, further optimizing the pipeline and avoiding the entanglement of the pipeline.

[0022] Preferably, a bracket is provided on the top plate, the fixed portion of the rotary joint is fixed to the bracket, and the rotating portion is fixed to the upper end of the housing of the clamping driver.

[0023] The fixed part of the rotary joint is fixed to the bracket to achieve the fixation of the fixed part of the rotary joint. The rotating part is fixed to the upper end of the shell of the pressing driver to achieve synchronous rotation of the rotating part and the pressing driver, thereby ensuring that the air outlet pipe will not be entangled.

[0024] Preferably, a connecting plate that rotates synchronously with the gas channel block is fixed at the lower end of the gas channel block, the connecting plate is located above the upper pressure plate, and the lower pressure plate is connected to the connecting plate through a vertically arranged connecting rod. The connecting plate enables synchronous rotation between the lower pressure plate and the gas channel block, and at the same time enables the lower pressure plate to be located below the upper pressure plate.

[0025] The utility model has the advantages that the gas pipeline for introducing gas into the inner cavity of the wheel hub can be optimized, as well as the gas or oil pipeline introduced into the air cylinder or the oil cylinder, to avoid entanglement of the gas pipe or the oil pipe, thereby smoothly realizing 360° rotation of the wheel hub in the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 It is a structural schematic diagram of the gear ring of the utility model.

[0028] Figure 3 for Figure 1 sectional view of .

[0029] Figure 4 This is a schematic diagram of the structure of the utility model after removing components such as the frame and the water tank.

[0030] Figure 5 for Figure 4 Cross-sectional view after the exhaust pipe is connected.

[0031] Figure 6 for Figure 4 Cross-sectional view from another angle.

[0032] Figure 7 for Figure 6 Enlarged view of the gas delivery ring.

[0033] Figure 8 for Figure 7 Enlarged view of the gas delivery ring.

[0034] Fig. 9 It is a schematic diagram of the structure at the connecting plate.

[0035] Figure numbers: frame 1, control panel 11, top plate 12, bearing 13, bearing seat 14, gear ring 15, clamping block 151, pad block 152, top plate 16, through hole 17, water tank 2, water tank cylinder 21, air pump 3, air inlet pipe 31, inlet pressure pipe 32, clamping driver 4, connecting plate 41, first air outlet 411, upper pressure plate 42, lower pressure plate 43, connecting rod 44, oil cylinder oil inlet hole 45, lifting Rod 46, upper pressure plate air passage 47, first air inlet hole 471, second air outlet hole 472, outlet pressure pipe 48, rotary driver 5, transmission gear 51, rotary joint 6, fixed part 61, rotating part 62, rotating part air outlet hole 621, rotating part oil outlet hole 622, air outlet pipe 7, gas channel block 8, gas delivery ring 81, second air inlet hole 811, air groove 812, gas channel block air passage 82, and air release valve 9. DETAILED DESCRIPTION

[0036] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0037] like Figures 1 to 3 As shown, this embodiment discloses a wheel hub air tightness detection device, including a frame 1, a top plate 12 arranged horizontally and an air pump 3 for pressurized gas are arranged on the top of the frame 1, a water tank 2 is arranged at the lower end of the frame 1, and the water tank 2 is lifted and lowered by a water tank cylinder 21, so that the wheel hub enters the water tank 2. A control panel 11 is fixed to the side end of the frame 1.

[0038] like Figures 1 to 3As shown, the top plate 12 is fixed with a bearing seat 14, and a bearing 13 is arranged in the bearing seat 14. The bearing 13 is sleeved on a vertically arranged gas channel block 8, so as to realize the rotation connection between the gas channel block 8 and the top plate 12 of the frame 1. A clamping mechanism and a rotary driver 5 for driving the clamping mechanism to rotate are arranged on the top plate 12. The clamping mechanism includes a clamping driver 4, a connecting plate 41, an upper pressing plate 42 and a lower pressing plate 43 from top to bottom. The lower end of the lifting rod 46 of the clamping driver 4 is connected to the upper pressing plate 42, and the connecting plate 41 is connected to the lower pressing plate 43 through the connecting rod 44, so that the lower pressing plate 43 is located below the upper pressing plate 42. The upper end of the gas channel block 8 is fixed to the gear ring 15, and the upper end of the gear ring 15 is fixed to the lower end of the housing of the clamping driver 4; the lower end of the gas channel block 8 is fixed to the connecting plate 41. The gear ring 15 is connected to the output end of the rotary driver 5 through the transmission gear 51. When the rotary driver 5 drives the gear ring 15 to rotate, the gear ring 15 will drive the gas channel block 8 and the clamping driver 4 to rotate, thereby realizing the synchronous rotation of the gas channel block 8, the clamping driver 4, the connecting plate 41, the upper pressure plate 42, and the lower pressure plate 43 along the same rotation axis.

[0039] like Figures 1 to 4 As shown, a rotary joint 6 is fixed to the top of the clamping driver 4, and the rotary joint 6 includes a fixed portion 61 fixed to the bracket 16 and a rotating portion 62 fixed to the upper end shell of the clamping driver 4, and a dynamic seal is formed between the fixed portion 61 and the rotating portion 62. The clamping driver 4 is an oil cylinder, and the rotary joint 6 is any existing component that can achieve separation of the air circuit or the oil circuit. The air inlet pipe 31 and the inlet pressure pipe 32 of the air pump 3 and the oil storage tank (not shown in the figure) are connected to the fixed portion 61 of the rotary joint 6, and the rotating portion 62 of the rotary joint 6 is fixedly connected to the top of the clamping driver 4. The rotating portion 62 of the rotary joint 6 is provided with two rotating portion air outlet holes 621 and one rotating portion oil outlet hole 622, and the rotating portion oil outlet hole 622 is connected to the outlet pressure pipe 48, and the outlet pressure pipe 48 is connected to the oil cylinder oil inlet hole 45 of the clamping driver 4.

[0040] like Figures 5 to 9As shown, the gas channel block 8 and the connecting plate 41 are provided with a gas channel block gas passage 82 that is interconnected and extends downward, and the gas channel block gas passage 82 passes through the connecting plate 41. An opening is provided on the circumferential side wall at the upper end of the gas channel block 8 (not shown in the figure), and a first air outlet 411 is provided at the lower end of the connecting plate 41. The lifting rod 46 and the upper pressing plate 42 are provided with an upper pressing plate gas passage 47 that is interconnected and extends downward, and a first air inlet 471 is provided on the circumferential side wall at the lower end of the lifting rod 46, and a second air outlet 472 is provided at the lower end of the upper pressing plate 42. When the upper pressing plate 42 and the lower pressing plate 43 are pressed against the wheel hub, the second air outlet 472 is connected to the inner cavity of the wheel hub. The first air inlet 471 is connected to the first air outlet 411 by a hose (not shown in the figure), and the hose needs to cooperate with the extension and retraction of the lifting rod 46, and the length of the hose is greater than the maximum distance the lifting rod 46 descends.

[0041] like Figures 5 to 9 As shown, a gas transmission ring 81 is sleeved on the circumferential outer side of the upper end of the gas channel block 8, and a clamping block 151 is provided at the upper end of the gas transmission ring 81. The circumferential inner wall of the clamping block 151 and the circumferential outer wall of the upper end of the gas channel block 8 have mutually matched thread structures, and screwing the clamping block 151 can clamp the gas transmission ring 81. A padding block 152 is provided at the lower end of the gas transmission ring 81, and the padding block 152 is supported on the bearing 13. The gas transmission ring 81 is clamped between the clamping block 151 and the padding block 152, so that the gas transmission ring 81 can rotate synchronously with the gas channel block 8.

[0042] like Figure 4 and Figure 5 As shown, an annular gas groove 812 is provided in the gas transmission ring 81, and the gas groove 812 is connected to the opening of the gas channel block (not marked in the figure), so that the gas groove 812 is connected to the gas channel block gas flow channel 82, and a second gas inlet hole 811 is provided on the circumferential side wall of the gas transmission ring 81, and the rotating part gas outlet hole 621 and the second gas inlet hole 811 are connected through the gas outlet pipe 7. Two upper and lower through holes 17 are provided at the circumferential outer edge of the gear ring 15, and the through hole 17 also penetrates the lower end of the clamping driver 4 and the clamping block 151, and the gas outlet pipe 7 passes through the through hole 17. The gas channel block 8 and the connecting plate 41 are provided with two gas channel block gas flow channels 82, and the gas transmission ring 81 is provided with gas grooves 812 corresponding to the gas channel block gas flow channels 82 one by one, and adjacent gas grooves 812 are arranged at upper and lower intervals.

[0043] like Fig. 9 As shown, the lower end of the lifting rod 46 is also connected to a deflation valve 9, which is communicated with the upper platen air passage 47, and a first air inlet hole 471 is also provided on the deflation valve 9. The deflation valve can not only realize air intake but also deflation.

[0044] When testing the air tightness of the wheel hub, the operator first places the wheel hub on the lower pressure plate 43, and then the lifting rod 46 of the clamping driver 4 drives the upper pressure plate 42 to press down, thereby clamping the wheel hub. Then the air pump 3 presses the gas, so that the high-pressure gas enters the inner cavity of the wheel hub, and then the water tank cylinder 21 drives the water tank 2 to rise, so that the wheel hub is immersed in the water tank 2, and the rotary driver 5 drives the gear ring 15 to rotate, so that the wheel hub rotates 360°. The operator observes whether there are bubbles at each position in the circumferential direction of the wheel hub, so as to judge whether the air tightness of the inner cavity of the wheel hub is good.

[0045] The specific directions of the gas path are, in sequence, the air pump 3, the air inlet pipe 31, the fixed part 61 of the rotary joint, the rotating part 62 of the rotary joint, the air outlet pipe 7, the air groove 812 of the air delivery ring 81, the air passage 82 of the gas channel block, the hose (not shown in the figure), the upper pressure plate air passage 47, and finally reach the inner cavity of the wheel hub.

Claims

1. A wheel hub air tightness detection device, comprising a frame, a clamping mechanism, and a rotary driver for causing the clamping mechanism to rotate, wherein the rotary driver is fixed to the top plate of the frame, the clamping mechanism is rotatably connected to the frame and comprises a clamping driver, an upper pressing plate and a lower pressing plate, the clamping driver is used to drive the upper pressing plate to press downward, and is characterized in that: The clamping mechanism is equipped with a rotating joint and a gas channel block, the rotating joint includes a rotating part and a fixed part fixed to the frame, the gas channel block passes downward through the top plate and is rotatably connected to the top plate, the gas channel block, the rotating part and the clamping mechanism rotate synchronously along the same rotation axis; the fixed part, the movable part, the gas channel block and the upper pressure plate are all provided with an air passage, the air passage of the fixed part is connected with the air passage of the movable part, and the fixed part and the rotating part are dynamically sealed, the air passage of the movable part is connected with the air passage of the gas channel block through an air outlet pipe, the air passage of the gas channel block is connected with the air passage of the upper pressure plate through a hose, and the length of the hose is greater than the maximum lifting stroke of the clamping driver.

2. The wheel hub air tightness detection device according to claim 1, characterized in that: A gas transmission ring is fixedly arranged on the outer surface of the gas channel block, an opening connected to the gas passage is provided on the surface of the gas channel block, an annular or arc-shaped gas groove is provided on the inner wall of the gas transmission ring, the gas groove is located circumferentially outside the opening and connected to the opening, and the gas groove of the gas transmission ring is connected to the gas passage of the rotating part through the gas outlet pipe.

3. The wheel hub air tightness detection device according to claim 1, characterized in that: The gas channel block is sleeved outside the lifting rod of the pressing driver, the length of the hose is greater than the maximum lifting stroke of the lifting rod, and the lifting rod is fixed to the upper pressing plate.

4. The wheel hub air tightness detection device according to claim 3, characterized in that: The gas channel block is fixed to the housing of the pressing driver. The gas channel block is located at the lower end of the pressing driver. The gas channel block is rotatably connected to the top plate via a bearing.

5. The wheel hub air tightness detection device according to claim 1, characterized in that: The clamping driver is rotatably connected to the top plate. A gear ring coaxial with the rotation axis of the clamping driver is provided on the housing of the clamping driver. The gear ring is used to receive the torque transmitted from the output end of the rotary driver.

6. The wheel hub air tightness detection device according to claim 5, characterized in that: The gear ring is provided with a through hole penetrating up and down for the outlet pipe to pass through. One end of the outlet pipe is connected to the rotating part, and the other end of the outlet pipe is directly or indirectly connected to the air passage of the gas passage block.

7. The wheel hub air tightness detection device according to any one of claims 1 to 6, characterized in that: The clamping driver is an air cylinder or an oil cylinder, the fixed part of the rotary joint is connected with an inlet pressure pipe for air or oil intake, the rotating part is provided with an outlet pressure pipe, and the other end of the outlet pressure pipe supplies air or oil to the clamping driver.

8. The wheel hub air tightness detection device according to any one of claims 1 to 6, characterized in that: A bracket is arranged on the top plate, the fixing part of the rotary joint is fixed to the bracket, and the rotating part is fixed to the upper end of the shell of the pressing driver.

9. The wheel hub air tightness detection device according to any one of claims 1 to 6, characterized in that: A connecting plate that rotates synchronously with the gas channel block is fixed at the lower end of the gas channel block, the connecting plate is located above the upper pressing plate, and the lower pressing plate is connected to the connecting plate through a vertically arranged connecting rod.

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