A vehicle bridge housing air tightness detection device

Abstract

The present application relates to the technical field of bridge housing weld detection, and specifically discloses a vehicle bridge housing air tightness detection device, which includes a workbench, a detection mechanism and a cleaning mechanism; the detection mechanism includes: a support assembly, a clamping assembly, a sealing assembly and a ventilation assembly, and the cleaning mechanism includes: an annular tube, on which a plurality of first spray pipes are arranged; a water tank, which is closed and connected to the annular tube; an exhaust pipe, which is connected between the piston cylinder and the water tank, so that the gas in the bridge housing can enter the water tank through the piston cylinder and the exhaust pipe in turn, squeeze the water in the water tank into the annular tube and then spray it from the first spray pipe to the weld of the bridge housing; a first valve body, which is arranged on the exhaust pipe and is used to control the on and off of the exhaust pipe. The present application can detect the air tightness of the bridge housing, and the cleaning process can be carried out immediately after the detection process is completed. The two processes can be integrated in one device, which is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of bridge housing weld detection, and in particular to a vehicle bridge housing air tightness detection device. Background Art

[0002] The axle housing is a supporting component in the chassis of a car, usually connected to the frame through a suspension, with wheels installed at both ends of the axle housing. The axle housing is the assembly base for the main reducer, differential, half-axle, and wheels in the car. Its main function is to support and protect the main reducer, differential, and half-axle. The function of the axle housing is to bear the load of the car and maintain the normal driving of the car on the road.

[0003] Drive axle housings are divided into three types according to their structural form: integral, separable and combined. Integral axle housings can be divided into three types: integral casting axle housings, steel plate stamping and welding axle housings, and expanded axle housings. Figure 1 and Figure 2 The steel plate stamping and welding bridge housing is composed of a bridge housing main part 281, a steel leaf spring seat, a half-axle sleeve 282, a main reducer housing 283, etc. The bridge housing main part 281 is composed of a symmetrically arranged upper and lower shells, and the two shells are welded together to form the bridge housing main part 281; then the steel leaf spring seat is welded to the outer wall of the bridge housing main part 281, the half-axle sleeve 282 is welded to the end of the bridge housing main part 281, and the main reducer housing 283 is fixedly connected to the bridge housing main part 281 by bolts to form a welded drive bridge housing. The welded drive bridge housing has the advantages of small mass, easy manufacturing, reasonable material utilization, good impact resistance, low cost, etc., and is widely used in passenger cars and commercial vehicles with small loading mass.

[0004] Since lubricating oil will be injected into the bridge housing, if there is a welding quality problem at the weld of the bridge housing, resulting in poor airtightness at the weld of the bridge housing, oil leakage will occur, thereby affecting the lubrication effect of other parts in the bridge housing, accelerating the wear of various components, reducing the safety performance of the vehicle, and weakening the stability of vehicle driving. Therefore, it is necessary to conduct an airtightness test on the weld of the bridge housing.

[0005] When testing the air tightness of the bridge housing, the bridge housing needs to be fixed, soapy water is applied to the welds on the outer surface of the bridge housing, and then the through holes at both ends of the bridge housing and the middle of the bridge housing are sealed, and air is introduced into the bridge housing to determine whether the air tightness of the bridge housing is good by observing whether bubbles appear at the welds. After completing the air tightness test of the bridge housing, the soapy water at the welds on the bridge housing needs to be washed off to achieve cleaning, so a device that can both detect whether the air tightness of the bridge housing is good and clean the welds of the bridge housing is needed. Summary of the invention

[0006] In order to facilitate the detection of the air tightness of the bridge housing and clean the welds of the bridge housing, the present application provides a vehicle bridge housing air tightness detection device.

[0007] The vehicle bridge housing air tightness detection device provided in the present application adopts the following technical solution:

[0008] A vehicle bridge housing air tightness detection device comprises: a workbench and a detection mechanism and a cleaning mechanism arranged on the workbench;

[0009] The detection mechanism includes:

[0010] A support assembly, the support assembly comprising two support frames arranged on a workbench, the top ends of the two support frames being respectively used to support the two ends of the axle housing;

[0011] A clamping assembly, wherein the clamping assembly comprises a first power telescopic member and a piston cylinder, wherein two first power telescopic members are provided, the support frame is located between the two first power telescopic members, the movable ends of the two first power telescopic members face toward a side close to each other, the piston cylinder is fixedly arranged at the movable end of the first power telescopic member, and the piston cylinder is used to be inserted into the end of the axle housing and block the end of the axle housing;

[0012] A plugging assembly, the plugging assembly comprising a first fixed plate, a second fixed plate, and a second power telescopic member, the first fixed plate and the second fixed plate are both located between two support frames, the axes of the first fixed plate and the second fixed plate are parallel, the peripheral sides of the first fixed plate and the second fixed plate are both provided with sealing gaskets, the first fixed plate and the second power telescopic member are both fixedly arranged on a workbench, the second fixed plate is arranged at the movable end of the second power telescopic member, and the first fixed plate and the second fixed plate are respectively used to plug two through holes in the middle of the bridge housing;

[0013] A ventilation assembly, the ventilation assembly comprising an air pump and an air pipe, the air pipe being connected between the air pump and the first fixed plate, the first fixed plate being provided with an air hole connected to the air pipe, the air hole penetrating the first fixed plate;

[0014] The cleaning mechanism comprises:

[0015] An annular tube, the annular tube is arranged on a workbench, the annular tube is used to be sleeved on the outside of the weld on the bridge housing, and the annular tube is provided with a plurality of first spray pipes connected with the inside of the annular tube;

[0016] A water tank, wherein the water tank is in a closed configuration, and the interior of the water tank is connected to the interior of the annular pipe;

[0017] An exhaust pipe connected between the piston cylinder and the water tank, so that the gas in the axle housing can enter the water tank through the piston cylinder and the exhaust pipe in sequence, squeeze the water in the water tank into the annular pipe and then spray it out from the first spray pipe to the weld of the axle housing;

[0018] The first valve body is arranged on the exhaust pipe and is used to control the on-off of the exhaust pipe.

[0019] By adopting the above technical scheme, the air tightness detection and cleaning of the bridge shell weld can be integrated into one operation; specifically: the support component can support the bridge shell; the clamping component ensures that the bridge shell is firmly placed and blocks the through holes at both ends of the bridge shell; the blocking component blocks the two through holes in the middle of the bridge shell; the ventilation component can ventilate the inside of the blocked bridge shell; apply soapy water or other foaming agents to the welds on the outer wall of the bridge shell, and after ventilating the inside of the bridge shell, bubbles will appear and rupture at the welds with poor welding quality. By observing whether there are bubbles, it can be judged whether the air tightness of the bridge shell is good and whether the welding meets the requirements. The location where the bubbles appear makes it easy for the operator to quickly find the leakage point and to repair the corresponding position of the bridge housing; after the inspection is completed, the first valve body is opened, and the high-pressure air inside the bridge housing can flow into the water tank through the piston cylinder and the exhaust pipe, and then the water in the water tank is squeezed into the annular tube, and the water in the annular tube can be squeezed out from the first spray pipe, thereby realizing the spray cleaning of the weld on the outer wall of the bridge housing and removing residual soapy water; on the one hand, the high-pressure air inside the bridge housing is reasonably utilized, and on the other hand, it is convenient for quick flushing of the soapy water at the weld, which helps to simplify the operation and enhance the cleaning effect.

[0020] Optionally, a pressure gauge is provided on the air pipe.

[0021] By adopting the above technical scheme, the pressure gauge can monitor the gas pressure in the air pipe in real time. After stopping the air supply to the bridge housing, the air tightness of the bridge housing can be judged by observing the value of the pressure gauge. When the gas pressure is stable, it indicates that the air tightness of the bridge housing is good. When the gas pressure decreases, it indicates that there is a leakage point on the bridge housing. Therefore, the setting of the pressure gauge can improve the accuracy of the test results, and can also prevent the failure of the test or misjudgment due to excessively high or low gas pressure. The operator can also adjust the working state of the air pump in time by observing the pressure gauge to ensure the smooth progress of the test process.

[0022] Optionally, a mounting block is fixedly provided at the movable end of the second power telescopic member, a mounting plate is fixedly provided on the second fixed plate, the mounting plate is provided with strip holes along its length direction, and locking bolts are passed through the strip holes for fixing the mounting plate to the mounting block.

[0023] By adopting the above-mentioned technical scheme, the position adjustment of the second fixed plate relative to the first fixed plate can be realized, so as to adapt to the errors existing in the bridge housing processing process or the installation process of the second fixed plate, and can also adapt to bridge housings of different sizes, thereby improving the applicability and flexibility of the device; the mounting plate is fixed to the mounting block by locking bolts, which ensures the stability of the second fixed plate during operation, avoids position displacement due to vibration or impact, and ensures the accuracy and reliability of detection.

[0024] Optionally, a support is slidably arranged on the workbench along the length direction of the first power telescopic member, and the annular tube is fixedly arranged on the support.

[0025] By adopting the above technical solution, the annular tube can be flexibly moved on the workbench. Before placing the bridge shell on the support frame, the annular tube can be moved to the side away from the support frame to facilitate placing the bridge shell on the support frame; after the bridge shell is placed, the annular tube can be slid to the outside of the bridge shell weld to facilitate timely cleaning of the weld with soapy water after the inspection is completed.

[0026] Optionally, a strip tube is movably connected to the annular tube, the length direction of the strip tube is parallel to the axis of the annular tube, the interior of the strip tube is connected to the interior of the annular tube, the strip tube is provided with a second spray pipe connected to its own interior, and a fixing component for fixing the strip tube to the annular tube is provided between the strip tube and the annular tube.

[0027] By adopting the above technical scheme, the annular tube can clean the soapy water at the annular weld between the main part of the bridge housing and the half-axle sleeve, and the strip tube can clean the soapy water at the linear weld on the main part of the bridge housing, thereby expanding the cleaning range; since the strip tube is movably inserted on the annular tube, that is, the strip tube is detachably connected, after the strip tube is removed, the space occupied by the device can be reduced, so that the annular tube can move a shorter distance to avoid the subsequent installation process of the bridge housing, which is more convenient.

[0028] Optionally, a pressure plate is provided in the water tank for sliding along the height direction of the water tank, and the pressure plate floats on the water surface in the water tank, and a limiting assembly is provided between the water tank and the pressure plate, and the limiting assembly includes a stopper, a first elastic member and a reset member, the stoppers are provided in two rows and each row includes a plurality of stoppers arranged at intervals along the height direction of the water tank, a receiving groove is provided on the inner wall of the water tank, one end of the stopper is slidably provided in the receiving groove, the first elastic member is provided between the stopper and the bottom wall of the receiving groove, the first elastic member causes the stopper to have a tendency to slide out of the receiving groove, and an inclined surface is provided at one end of the stopper close to the inside of the water tank, so that when the pressure plate slides toward the bottom of the water tank, the stopper can slide into the receiving groove to avoid it, and the reset member is provided on the stopper, and the reset member is used to drive the stopper to slide into the receiving groove.

[0029] By adopting the above technical solution, the limit assembly allows the pressure plate to slide downward only under the action of gravity, but not upward; the pressure plate is always pressed on the water surface in the water tank under the action of its own gravity. As the number of inspections increases, the number of spray cleaning of the weld increases, the amount of water in the water tank gradually decreases, so that the liquid level gradually decreases, and the pressure plate can always fit on the water surface under the action of gravity; the problem that as the inspection process proceeds, the amount of water in the water tank decreases, resulting in a decrease in the liquid level, is avoided, so that the high-pressure air in the bridge housing diffuses into the cavity in the water tank after entering the water tank, and then the water can be squeezed out only after the pressure in the water tank increases to a certain level; due to the provision of the pressure plate, the pressure plate is always pressed on the water surface, so when the high-pressure air in the bridge housing enters the water tank, the air can directly squeeze the water under the pressure plate in the water tank into the annular tube, so it is only necessary to keep the pressure inside the bridge housing consistent during each inspection process, so that the high-pressure air content in the bridge housing can be kept consistent, so that the amount of water squeezed out of the water tank each time is consistent, thereby ensuring the cleaning effect of soapy water on the annular weld of the bridge housing.

[0030] Optionally, a first connecting pipe and a second connecting pipe are provided at one end of the exhaust pipe away from the piston cylinder, the first connecting pipe and the second connecting pipe are both connected to the exhaust pipe, the first connecting pipe is connected to the water tank, the second connecting pipe is connected to the annular pipe, and the first connecting pipe and the second connecting pipe are both provided with a second valve body for controlling the opening and closing of the pipeline.

[0031] By adopting the above technical scheme, after the air tightness test is completed, when the second valve body on the first connecting pipe is opened and the second valve body on the second connecting pipe is closed, the high-pressure air in the bridge housing can enter the water tank through the first connecting pipe, squeeze the water in the water tank into the annular tube, and then spray it out from the first spray pipe to clean the soapy water at the weld; when the second valve body on the first connecting pipe is closed and the second valve body on the second connecting pipe is opened, the air pump is turned on, and the air discharged by the air pump can enter the annular tube through the bridge housing, the piston cylinder, the exhaust pipe and the second connecting pipe, and then spray it out from the first spray pipe, thereby blowing the water at the weld, accelerating the drying process of the water, and further improving the cleaning effect; the setting of the first connecting pipe and the second connecting pipe enables the annular tube and the first spray pipe to not only flush the soapy water at the weld, but also blow and dry the flushing water. The integration of the two helps to simplify the operation and improve the cleaning effect.

[0032] Optionally, a baffle for closing the end of the second connecting tube is slidably provided at the connection between the second connecting tube and the annular tube, and a second elastic member is provided between the baffle and the second connecting tube, so that the second elastic member makes the baffle press against the end of the second connecting tube.

[0033] By adopting the above technical solution, when the air in the bridge housing enters the second connecting pipe through the exhaust pipe, the air pressure can overcome the elastic force of the second elastic member and push the baffle to move, so that the air can smoothly enter the annular tube; and when there is no air pressure in the second connecting pipe, the elastic force of the second elastic member can ensure that the baffle fits tightly to the end of the second connecting pipe, effectively preventing the water in the annular tube from flowing back into the second connecting pipe, so that the water in the annular tube can be used to flush the soapy water at the weld, and the stability and reliability of the system can also be ensured.

[0034] Optionally, a heating box is provided on the pipeline of the second connecting pipe, and a heating element is provided in the heating box.

[0035] By adopting the above technical solution, the heating element in the heating box can heat the air passing through the second connecting pipe, so that the wind sprayed from the annular pipe and the first spray pipe is hot air, which can accelerate the drying of moisture at the weld, help enhance the drying effect, and improve the drying efficiency.

[0036] Optionally, a receiving tray is provided on the workbench.

[0037] By adopting the above technical solution, the receiving tray can collect the clean water sprayed from the first spray pipe and the second spray pipe and the soapy water at the weld washed down by the water, thereby preventing the cleaning liquid from flowing freely and causing pollution or waste; the design of the receiving tray can also improve the cleanliness of the working environment of the entire device and facilitate subsequent cleaning work.

[0038] In summary, this application includes the following beneficial technical effects:

[0039] 1. The detection mechanism can quickly and stably fix the bridge housing and seal its through holes through the cooperation of the supporting component, the clamping component and the sealing component. By ventilating the sealed bridge housing and observing whether there are bubbles at the weld on the outer surface of the bridge housing, it can quickly determine whether there is a leak and quickly find the location of the leak, which is convenient for subsequent repair of the bridge housing. After the detection is completed, the first valve body is opened, and the high-pressure air in the bridge housing can squeeze out the water in the water tank, so that the water in the water tank can be sprayed to the weld through the first spray pipe, thereby cleaning the weld with soapy water. Therefore, the cleaning process can be carried out immediately after the detection process is completed, and the two processes can be integrated in one device, which is more convenient.

[0040] 2. After completing the air tightness test, the high-pressure air in the axle housing can drive the water in the water tank to be discharged, which helps to achieve the rational use of the high-pressure air in the axle housing and reduce waste.

[0041] 3. The pressure plate is always pressed on the water surface in the water tank, so that the same amount of high-pressure air can squeeze out the same amount of water from the water tank. As the number of tests increases, the amount of water squeezed out of the water tank each time is consistent, which helps to ensure the cleaning effect of soapy water on the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural diagram of the bridge housing;

[0043] Figure 2 This is an exploded schematic diagram of the bridge housing;

[0044] Figure 3 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0045] Figure 4 It is a schematic diagram of the overall structure of another perspective of the embodiment of the present application;

[0046] Figure 5 is a cross-sectional view of the embodiment of the present application along the axis direction of the piston cylinder, which is intended to show the connection relationship between the piston cylinder and the exhaust pipe;

[0047] Figure 6 It is a structural schematic diagram of the embodiment of the present application for demonstrating the cleaning mechanism;

[0048] Figure 7 is a cross-sectional view of an embodiment of the present application for illustrating a cleaning mechanism;

[0049] Figure 8 This is a structural schematic diagram of an embodiment of the present application for illustrating the installation position of a strip tube;

[0050] Fig. 9 It is a structural schematic diagram for showing a fixing component in an embodiment of the present application;

[0051] Fig.10 It is a schematic diagram of the internal structure of the water tank in the embodiment of the present application;

[0052] Fig.11 yes Figure 7 A magnified schematic diagram of center A.

[0053] Figure numerals: 1, workbench; 2, support assembly; 21, support frame; 22, mounting seat; 3, clamping assembly; 31, first power telescopic member; 32, piston cylinder; 4, blocking assembly; 41, first fixed plate; 411, air vent; 42, second fixed plate; 43, second power telescopic member; 44, sealing pad; 5, ventilation assembly; 51, air pump; 52, air pipe; 6, cleaning mechanism; 61, annular pipe; 611, first spray pipe; 612, notch; 613, connecting tube; 62, water tank; 621, receiving groove; 622, water inlet; 6221, end cover; 63, exhaust pipe; 64, first valve body; 7, pressure gauge; 8, mounting block; 9, mounting plate; 91, strip hole; 10, locking bolt; 11, Support; 12. Strip pipe; 121. Second spray pipe; 13. Fixing assembly; 131. First magnet block; 132. Second magnet block; 14. Press plate; 141. Pull rod; 15. Limiting assembly; 151. Block; 152. First elastic member; 153. Reset member; 1531. Main rope; 1532. Branch rope; 16. First connecting pipe; 17. Second connecting pipe; 18. Second valve body; 19. Baffle; 20. Second elastic member; 23. Heating box; 231. Heating member; 24. Receiving plate; 25. Support seat; 26. Support block; 27. Connecting pipe; 28. Bridge housing; 281. Bridge housing main member; 2811. Linear weld; 282. Half-axle sleeve; 283. Main reducer housing; 284. Annular weld. DETAILED DESCRIPTION

[0054] The following combination Figure 1-Figure 11 This application is described in further detail.

[0055] The embodiment of the present application discloses a vehicle bridge housing air tightness detection device. The detection device is used to detect the bridge housing, referring to Figure 1 and Figure 2 The axle housing 28 includes an axle housing main part 281, a half-shaft sleeve 282 and a main reducer housing 283. The axle housing main part 281 is welded by two parts of the housing, and both sides of the axle housing main part 281 are formed with linear welds 2811. Two half-shaft sleeves 282 are provided, and are respectively welded to the two ends of the axle housing main part 281, so that an annular weld 284 is formed at the connection between the half-shaft sleeve 282 and the axle housing main part 281. The main reducer housing 283 is fixedly connected to one side of the axle housing main part 281 by bolts.

[0056] Reference Figure 3 The vehicle bridge housing air tightness detection device comprises a workbench 1, the surface of the workbench 1 is horizontal. A detection mechanism and a cleaning mechanism 6 are arranged on the top surface of the workbench 1. The detection mechanism is used to perform air tightness detection on the bridge housing 28 and quickly find out the leakage point of the bridge housing 28; the cleaning mechanism 6 is used to quickly clean the soapy water applied to the weld of the bridge housing 28.

[0057] Reference Figure 4 The detection mechanism includes a support assembly 2, a clamping assembly 3, a blocking assembly 4 and a ventilation assembly 5. The support assembly 2 includes a support frame 21 and a mounting seat 22. Two support frames 21 are provided, which are fixedly connected to the workbench 1 at intervals; two mounting seats 22 are provided, which correspond to the two support frames 21 respectively, and each mounting seat 22 is slidably set on the top wall of the support frame 21 along the width direction of the workbench 1. After placing the two ends of the bridge housing 28 on the top surfaces of the two mounting seats 22 respectively, the mounting seats 22 can support the bridge housing 28 and also allow the bridge housing 28 to slide along the width direction of the workbench 1 with the mounting seats 22.

[0058] The clamping assembly 3 includes a first power telescopic member 31 and a piston cylinder 32. The first power telescopic member 31 is a cylinder, and in other embodiments, it can also be an electric push rod or an oil cylinder. A support seat 25 is fixedly connected to the top surface of the workbench 1, and two support seats 25 are provided, and the two support frames 21 are located between the two support seats 25. There are two first power telescopic members 31, which correspond to the two support seats 25 respectively. The first power telescopic members 31 are fixedly connected to the corresponding support seats 25. The first power telescopic members 31 are arranged along the length direction of the workbench 1, and the piston rod ends of the two first power telescopic members 31 face the side close to each other. There are two piston cylinders 32, which are fixedly connected to the piston rod ends of the two first power telescopic members 31 respectively. The end of the piston cylinder 32 close to the first power telescopic member 31 is closed, and the outer diameter of the piston cylinder 32 is the same as the inner diameter of the half-shaft sleeve 282 of the bridge housing 28. Therefore, by inserting the two piston cylinders 32 into the ends of the half-shaft sleeve 282 at both ends of the bridge housing 28, the bridge housing 28 can be clamped and fixed, and the ends of the half-shaft sleeve 282 at both ends of the bridge housing 28 can be blocked. An elastic pad is provided on the outer wall of the piston cylinder 32 to enhance the sealing effect.

[0059] The blocking assembly 4 includes a first fixed disk 41, a second fixed disk 42, and a second power telescopic member 43. A support block 26 is fixedly connected to the top surface of the workbench 1, and the support block 26 is located between the two support frames 21. The first fixed disk 41 is fixedly connected to the support block 26, and the axis of the first fixed disk 41 is arranged along the width direction of the workbench 1. The second power telescopic member 43 is a cylinder, and may also be an electric push rod or an oil cylinder in other embodiments. The second power telescopic member 43 is fixedly connected to the support block 26, and the second power telescopic member 43 is arranged along the width direction of the workbench 1. The piston rod end of the second power telescopic member 43 is provided with a mounting plate 9, and the second fixed disk 42 is fixedly connected to the end of the mounting plate 9, and the axis of the second fixed disk 42 is arranged along the width direction of the workbench 1. Therefore, after the bridge housing 28 is placed on the mounting seat 22, the bridge housing 28 is located between the first fixed plate 41 and the second fixed plate 42. The bridge housing 28 is slid along the width direction of the workbench 1 so that the first fixed plate 41 can be inserted into the through hole on one side of the middle part of the bridge housing 28. Then, the second power telescopic member 43 drives the second fixed plate 42 to slide so that the second fixed plate 42 can be inserted into the through hole on the other side of the middle part of the bridge housing 28. Sealing pads 44 are provided on the outer walls of the peripheral sides of the first fixed plate 41 and the second fixed plate 42, so that the sealing performance of the two through holes in the middle part of the bridge housing 28 can be enhanced after being blocked.

[0060] Furthermore, the piston rod end of the second power telescopic member 43 is fixedly connected to a mounting block 8, and a threaded hole is provided on the mounting block 8. A strip hole 91 is provided on the mounting plate 9 along its length direction, and a locking bolt 10 is passed through the strip hole 91. One end of the locking bolt 10 is threadedly connected to the threaded hole on the mounting block 8, and the head of the locking bolt 10 is pressed against the mounting plate 9, so that the mounting plate 9 can be fixed on the mounting block 8. Therefore, after loosening the locking bolt 10, the mounting plate 9 can be adjusted to the desired position, and then the locking bolt 10 can be tightened, thereby adjusting the position of the second fixed plate 42 to adapt to the errors existing during the processing of the bridge housing 28 or the installation of the second fixed plate 42.

[0061] The ventilation assembly 5 includes an air pump 51 and an air pipe 52. The air pump 51 is fixedly connected to the workbench 1; the air pipe 52 is fixedly connected between the air pump 51 and the first fixed plate 41. The first fixed plate 41 is coaxially provided with an air hole 411 that is arranged through, and one end of the air hole 411 is connected to the air pipe 52. Therefore, after the axle housing 28 is sealed, the air pump 51 can transport air to the axle housing 28 through the air pipe 52 and the air hole 411, and then the air tightness of the axle housing 28 can be judged by observing whether bubbles appear at the weld on the outer wall of the axle housing 28.

[0062] Furthermore, a pressure gauge 7 is fixedly connected to one end of the air pipe 52 near the first fixed plate 41. The pressure gauge 7 can detect the pressure in the air pipe 52. Therefore, after a certain pressure of air is introduced into the bridge housing 28, the air supply to the bridge housing 28 can be stopped, and then the reading of the pressure gauge 7 can be observed; if the reading of the pressure gauge 7 remains constant, it indicates that the air tightness of the bridge housing 28 is good; if the reading of the pressure gauge 7 gradually decreases, it indicates that there is a leakage point on the bridge housing 28, and then the leakage point can be quickly found by quickly finding the position where the bubble appears. In addition, the amount of leakage can be judged according to the decreasing speed of the reading of the pressure gauge 7.

[0063] Reference Figure 5 and Figure 6 , the cleaning mechanism 6 is provided with two groups, corresponding to the two piston cylinders 32 respectively. The cleaning mechanism 6 includes an annular tube 61, a water tank 62, an exhaust pipe 63 and a first valve body 64. A support 11 is slidably provided on the top wall of the workbench 1 along its own length direction, and the annular tube 61 is fixedly connected to the support 11, and the axis of the annular tube 61 is arranged along the length direction of the workbench 1. A first spray pipe 611 connected to the inside of the annular tube 61 is fixedly connected to the inner wall of the annular tube 61. The first spray pipe 611 is provided in plurality and arranged in a circular array, so that the water or air in the annular tube 61 can be sprayed outward from the first spray pipe 611 and sprayed onto the annular weld 284 at the connection between the bridge housing main component 281 and the half-axle sleeve 282.

[0064] Reference Figure 7 The water tank 62 is fixedly connected to the support 11, and the water tank 62 is sealed. The water tank 62 is filled with water, and the height direction of the water tank 62 is vertically arranged. A connecting pipe 27 is arranged between the bottom of the water tank 62 and the annular pipe 61, and the connecting pipe 27 connects the inside of the water tank 62 and the inside of the annular pipe 61, so that the water in the water tank 62 can enter the annular pipe 61 through the connecting pipe 27.

[0065] Reference Figure 5 and Figure 6 The exhaust pipe 63 is a hose, which is fixedly connected between the piston cylinder 32 and the water tank 62. One end of the exhaust pipe 63 is connected to the inside of the piston cylinder 32, and the other end of the exhaust pipe 63 is connected to the bottom of the water tank 62. Therefore, the high-pressure air in the axle housing 28 can enter the water tank 62 through the piston cylinder 32 and the exhaust pipe 63. Since the water tank 62 is sealed, the high-pressure air entering the water tank 62 can squeeze the water in the water tank 62 into the annular tube 61.

[0066] The first valve body 64 is a ball valve or a stop valve, and any valve body that can control the opening and closing of the pipeline can be used. The first valve body 64 is fixedly connected to the exhaust pipe 63. Before performing the air tightness test, apply soapy water to the annular weld 284. When performing the air tightness test on the bridge housing 28, the first valve body 64 is closed, so that the exhaust pipe 63 is blocked, so that the air pump 51 can pass air into the blocked bridge housing 28, thereby realizing the air tightness test. After the test is completed, the first valve body 64 is opened, and the high-pressure air in the bridge housing 28 can enter the water tank 62 through the exhaust pipe 63, squeeze the water in the water tank 62 into the annular pipe 61, and then the water is sprayed from the first spray pipe 611 to the annular weld 284 outside the bridge housing 28, thereby realizing the cleaning of the soapy water at the annular weld 284.

[0067] A receiving tray 24 is also provided on the top wall of the workbench 1, and the receiving tray 24 can receive the sprayed clean water and the washed soapy water, thereby ensuring the cleanliness of the working environment.

[0068] Reference Figure 8 and Fig. 9 Furthermore, the two annular tubes 61 are both plugged with a strip tube 12 on one side close to each other, and there are two strip tubes 12 corresponding to each annular tube 61. A notch 612 is provided on the annular tube 61; one end of the strip tube 12 is open, and the other end is closed, and the open end of the strip tube 12 is plugged into the notch 612, thereby connecting the strip tube 12 and the annular tube 61. The strip tube 12 is arranged along the length direction of the workbench 1, and a second spray pipe 121 connected to the inside of the strip tube 12 is fixedly connected to the strip tube 12. A plurality of second spray pipes 121 are arranged evenly spaced along the length direction of the strip tube 12. Therefore, water or air in the annular tube 61 can also enter the strip tube 12, and then spray out from the second spray pipe 121, thereby cleaning the linear weld 2811 on the bridge housing main part 281.

[0069] Reference Fig. 9 A fixing assembly 13 for fixing the strip tube 12 on the annular tube 61 is provided between the strip tube 12 and the annular tube 61. The fixing assembly 13 includes a first magnet block 131 and a second magnet block 132. The first magnet block 131 is fixedly connected to the end of the strip tube 12, and the second magnet block 132 is fixedly connected to the notch 612 on the annular tube 61. The magnetic poles of the first magnet block 131 and the second magnet block 132 are opposite to each other on the side close to each other. Therefore, after the strip tube 12 is inserted into the annular tube 61, the first magnet block 131 and the second magnet block 132 can be attracted to each other to fix the strip tube 12. In other embodiments, the fixing assembly 13 can also be a buckle connection structure between a buckle and a slot.

[0070] In the above scheme, as the number of detections increases, the amount of water in the water tank 62 will decrease. In order to reduce the impact of the reduction in water volume on the spray volume, refer to Fig.10 A pressure plate 14 is slidably disposed in the water tank 62 in the vertical direction. The pressure plate 14 floats on the water surface. A limiting assembly 15 is disposed between the pressure plate 14 and the water tank 62 so that the pressure plate 14 can only slide downward.

[0071] The limiting assembly 15 includes a stopper 151, a first elastic member 152 and a reset member 153. The stopper 151 is arranged in two rows and is respectively located on both sides of the water tank 62, and each row includes a plurality of stoppers 151 evenly spaced in the vertical direction. The inner walls on both sides of the water tank 62 are provided with receiving grooves 621, and the groove depth direction of the receiving groove 621 is horizontal. One end of the stopper 151 is slidably arranged in the receiving groove 621; the groove depth of the receiving groove 621 is greater than the length of the stopper 151, so that the stopper 151 can completely slide into the receiving groove 621.

[0072] The first elastic member 152 is a spring, and the first elastic member 152 is fixedly connected between the stopper 151 and the bottom wall of the receiving groove 621. The first elastic member 152 is in a compressed state, so that the stopper 151 tends to slide to the outside of the receiving groove 621. Under normal conditions, one end of the stopper 151 is located in the receiving groove 621, and the other end of the stopper 151 is located in the water tank 62 outside the receiving groove 621. An inclined surface is provided on the top surface of the stopper 151 near the inner end of the water tank 62, and correspondingly, inclined surfaces are also provided on the bottom walls on both sides of the pressing plate 14; therefore, as the water level drops, the pressing plate 14 also moves downward under the action of its own gravity, and under the action of the inclined surface, the pressing plate 14 can push the stopper 151 to slide when it moves downward, so that the stopper 151 completely slides into the corresponding receiving groove 621, thereby avoiding the downward movement of the pressing plate 14. When the pressing plate 14 moves down to the bottom of the stopper 151, the first elastic member 152 makes one end of the stopper 151 slide out of the receiving groove 621 without the blocking of the pressing plate 14, thereby limiting the upward movement of the pressing plate 14, so that the pressing plate 14 can only slide downward. The elastic coefficient of the first elastic member 152 is relatively small, so that when the pressing plate 14 slides down, it can overcome the elastic force of the first elastic member 152, so that the stopper 151 slides into the receiving groove 621 for avoidance.

[0073] Since the pressing plate 14 can only slide downward, the air entering the water tank 62 through the exhaust pipe 63 can directly squeeze out the water in the water tank 62, thereby helping to ensure the spraying amount, thereby ensuring the cleaning effect of the soapy water on the weld.

[0074] The reset member 153 includes a connecting rope, which is a flexible rope body without elasticity, and includes a main rope 1531 and a branch rope 1532. There are multiple branch ropes 1532, and the number of the branch ropes 1532 is the same as the number of the block 151. One end of the branch rope 1532 is fixedly connected to the block 151, and the other end of the branch rope 1532 passes through the bottom wall of the receiving groove 621 and extends to the outside of the water tank 62; one end of the branch rope 1532 located outside the water tank 62 is fixedly connected to the main rope 1531. Therefore, only the main rope 1531 needs to be pulled outward, and the main rope 1531 can drive the block 151 to slide into the receiving groove 621 through the branch rope 1532, thereby canceling the restriction of the block 151 on the upward movement of the pressure plate 14, making it easier to move the pressure plate 14 upward, thereby replenishing water in the water tank 62.

[0075] A pull rod 141 is fixedly connected to the top wall of the pressing plate 14, and one end of the pull rod 141 passes through the top wall of the water tank 62, so that the pressing plate 14 can be easily pulled up by the pull rod 141. A water inlet 622 is provided on the side wall at the top of the water tank 62, and an end cap 6221 is threadedly connected to the water inlet 622, so that water can be easily added to the water tank 62 after the end cap 6221 is unscrewed, and the screw cap is tightened after the water is added, so that the inside of the water tank 62 is in a sealed state, which is convenient for squeezing out the water later.

[0076] Among them, refer to Figure 7 The diameter of the connecting pipe 27 is relatively small, so when the interior of the water tank 62 is sealed, under the action of air pressure, the water in the water tank 62 can remain in the water tank 62, and the gravity of the pressure plate 14 is not sufficient to discharge the water in the water tank 62 into the annular pipe 61; when the exhaust pipe 63 introduces air into the water tank 62, the pressure in the water tank 62 increases, and thus the water in the water tank 62 can be squeezed out under the action of pressure.

[0077] In other embodiments, a hose may be fixedly connected to the annular tube 61, and the other end of the hose is fixedly inserted in the pressing plate 14, and the end of the hose passes through the bottom wall of the pressing plate 14, so that the hose is connected to the inside of the water tank 62. The hose has a small diameter, so the gravity of the pressing plate 14 is not enough to force the water in the water tank 62 into the hose and the annular tube 61; only when the exhaust pipe 63 introduces air into the water tank 62, the water in the water tank 62 can be squeezed into the hose, and then the water in the hose is discharged into the annular tube 61, so that the cleaning process proceeds smoothly.

[0078] Reference Figure 6After the soapy water is rinsed at the weld, in order to facilitate the drying of the clean water adhering to the weld, the end of the exhaust pipe 63 away from the piston cylinder 32 is fixedly connected with the first connecting pipe 16 and the second connecting pipe 17, and the first connecting pipe 16 and the second connecting pipe 17 are both connected to the exhaust pipe 63. The end of the first connecting pipe 16 is connected to the bottom of the water tank 62, and the end of the second connecting pipe 17 is connected to the inside of the annular pipe 61; the first connecting pipe 16 and the second connecting pipe 17 are both provided with a second valve body 18, which is a ball valve or a stop valve, and any valve body that can control the opening and closing of the pipeline can be used.

[0079] After the air tightness test is completed, the first valve body 64 is opened so that the high-pressure air in the bridge housing 28 can flow into the exhaust pipe 63. At the same time, the second valve body 18 on the second connecting pipe 17 is closed, and the second valve body 18 on the first connecting pipe 16 is opened, and the air in the exhaust pipe 63 can flow into the water tank 62 through the first connecting pipe 16, squeezing out the water in the water tank 62, thereby achieving water spray cleaning of the weld. When the original high-pressure air in the bridge housing 28 is emptied, the water spray cleaning process is completed; then the second valve body 18 on the second connecting pipe 17 is opened again, and the second valve body 18 on the first connecting pipe 16 is closed, and the air pump 51 is turned on at this time, and the air pump 51 can transport air to the exhaust pipe 63, and the air in the exhaust pipe 63 flows into the annular pipe 61 through the second connecting pipe 17, and then blows air to the weld to accelerate the drying of moisture at the weld.

[0080] Further, refer to Figure 7 A heating box 23 is arranged on the pipeline of the second connecting pipe 17, and the heating box 23 is fixedly connected to the support 11. The second connecting pipe 17 is communicated with the cavity inside the heating box 23. A heating element 231 is arranged inside the heating box 23, and the heating element 231 is a heating wire. When the heating wire is energized, it can heat the air in the heating box 23, so that the air flowing into the annular tube 61 through the second connecting pipe 17 is hot air, so that hot air can be ejected from the annular tube 61 and the strip tube 12, thereby accelerating the drying of moisture at the weld.

[0081] In addition, refer to Fig.11A connecting tube 613 is fixedly connected to the outer wall of the annular tube 61. One end of the connecting tube 613 is connected to the inside of the annular tube 61, and the other end of the connecting tube 613 is connected to the end of the second connecting tube 17. A baffle 19 is slidably arranged along the axial direction of the connecting tube 613 at one end of the connecting tube 613 close to the annular tube 61. A second elastic member 20 is fixedly connected between the baffle 19 and the connecting tube 613. The second elastic member 20 is a spring. The second elastic member 20 makes the baffle 19 press against the end of the connecting tube 613, thereby closing the second connecting tube 17. Therefore, when clean water is passed into the annular tube 61, the baffle 19 is in a closed state; when air is passed into the second connecting tube 17, the baffle 19 can be pushed open under the action of the air pressure in the second connecting tube 17, and the air in the second connecting tube 17 can enter the annular tube 61 and then be discharged, thereby achieving the drying treatment of the moisture at the weld. The baffle 19 can prevent the water in the annular tube 61 from flowing back into the second connecting tube 17, thereby ensuring full utilization of the clean water in the annular tube 61 and preventing the clean water from flowing back into the heating box 23 and causing damage to the heating element 231.

[0082] The implementation principle of a vehicle bridge housing air tightness detection device in an embodiment of the present application is as follows: the two ends of the bridge housing 28 are placed on the top of the two mounting seats 22, and the bridge housing 28 is supported by the mounting seats 22. Then the bridge housing 28 is slid toward the side close to the first fixed plate 41, so that the first fixed plate 41 is inserted into the through hole in the middle of the bridge housing 28 and the through hole is blocked. Then the second power telescopic member 43 causes the second fixed plate 42 to slide toward the side close to the first fixed plate 41, so that the second fixed plate 42 is inserted into the through hole on the other side of the middle of the bridge housing 28 and the through hole is blocked. Then the first power telescopic member 31 drives the piston cylinder 32 to slide, and the two piston cylinders 32 are respectively inserted into the through holes at both ends of the bridge housing 28 and the end through holes are blocked, thereby completing the fixing and blocking process of the bridge housing 28.

[0083] Then apply soapy water to the annular weld 284 and the linear weld 2811 on the outer surface of the bridge housing 28. In the initial state, the first valve body 64 is in a closed state and the exhaust pipe 63 is blocked. Air is introduced into the blocked bridge housing 28 until the pressure gauge 7 reaches a predetermined value; then stop introducing air into the bridge housing 28 and observe whether the value of the pressure gauge 7 changes. If the value of the pressure gauge 7 remains constant, it indicates that the air tightness of the bridge housing 28 is good; if the value of the pressure gauge 7 decreases, it indicates that there is a leak on the bridge housing 28. At this time, the position of the bubbles appearing at the weld of the bridge housing 28 can be observed to quickly find the leak, and then the leak can be repaired by welding. After completing the air tightness test of the bridge housing 28, clean the soapy water at the weld of the bridge housing 28.

[0084] When cleaning, first slide the two supports 11 toward the side close to each other, so that the annular tube 61 is sleeved on the outside of the annular weld 284 on the bridge housing 28; then the strip tube 12 is plugged into the annular tube 61. Then open the first valve body 64 and the second valve body 18 on the first connecting pipe 16, so that the high-pressure air in the bridge housing 28 can flow into the water tank 62 through the exhaust pipe 63 and the first connecting pipe 16, squeeze the water in the water tank 62 into the annular tube 61 and the strip tube 12, and then the water in the annular tube 61 is sprayed outward to the annular weld 284 through the first spray pipe 611, and the water in the strip tube 12 is sprayed outward to the linear weld 2811 through the second spray pipe 121, so as to rinse the soapy water at the weld. When the high-pressure air in the bridge housing 28 is emptied, the soapy water rinsing process is completed.

[0085] Next, the second valve body 18 on the first connecting pipe 16 is closed, and the second valve body 18 on the second connecting pipe 17 is opened, and then the air pump 51 is started. The air delivered by the air pump 51 is sequentially sent into the annular pipe 61 through the bridge housing 28, the exhaust pipe 63, the second connecting pipe 17 and the heating box 23, and then the heated air is sprayed out, thereby drying the clean water at the weld, accelerating the drying of the water, and helping to enhance the cleaning effect.

[0086] The above are optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vehicle bridge housing air tightness detection device, characterized in that: include: A workbench (1) and a detection mechanism and a cleaning mechanism (6) arranged on the workbench (1); The detection mechanism includes: A support assembly (2), the support assembly (2) comprising two support frames (21) arranged on the workbench (1), the top ends of the two support frames (21) being used to support two ends of the bridge housing (28) respectively; A clamping assembly (3), the clamping assembly (3) comprising a first power telescopic member (31) and a piston cylinder (32), two first power telescopic members (31) are provided, the support frame (21) is located between the two first power telescopic members (31), the movable ends of the two first power telescopic members (31) are oriented toward a side close to each other, the piston cylinder (32) is fixedly arranged at the movable end of the first power telescopic member (31), and the piston cylinder (32) is used to be inserted into an end of the axle housing (28) and to seal the end of the axle housing (28); A blocking assembly (4), the blocking assembly (4) comprising a first fixed disk (41), a second fixed disk (42) and a second power telescopic member (43), the first fixed disk (41) and the second fixed disk (42) being located between two support frames (21), the axes of the first fixed disk (41) and the second fixed disk (42) being parallel, sealing pads (44) being arranged on the circumference of the first fixed disk (41) and the second fixed disk (42), the first fixed disk (41) and the second power telescopic member (43) being fixedly arranged on the workbench (1), the second fixed disk (42) being arranged at the movable end of the second power telescopic member (43), the first fixed disk (41) and the second fixed disk (42) being used to block two through holes in the middle of the bridge housing (28) respectively; A ventilation assembly (5), the ventilation assembly (5) comprising an air pump (51) and an air pipe (52), the air pipe (52) being connected between the air pump (51) and a first fixed plate (41), the first fixed plate (41) being provided with an air hole (411) connected to the air pipe (52), the air hole (411) penetrating the first fixed plate (41); The cleaning mechanism (6) comprises: an annular tube (61), the annular tube (61) being arranged on a workbench (1), the annular tube (61) being used to be sleeved on the outside of a weld on a bridge housing (28), the annular tube (61) being provided with a plurality of first spray pipes (611) which are in communication with the inside of the annular tube (61); A water tank (62), the water tank (62) being in a closed configuration, the interior of the water tank (62) being in communication with the interior of the annular tube (61); An exhaust pipe (63), the exhaust pipe (63) being connected between the piston cylinder (32) and the water tank (62), so that the gas in the axle housing (28) can enter the water tank (62) through the piston cylinder (32) and the exhaust pipe (63) in sequence, squeeze the water in the water tank (62) into the annular pipe (61), and then spray out from the first spray pipe (611) to the weld of the axle housing (28); A first valve body (64), the first valve body (64) is arranged on the exhaust pipe (63) and is used to control the on-off of the exhaust pipe (63).

2. The vehicle axle housing air tightness detection device according to claim 1, characterized in that: The air pipe (52) is provided with a pressure gauge (7).

3. The vehicle axle housing air tightness detection device according to claim 1, characterized in that: A mounting block (8) is fixedly provided at the movable end of the second power telescopic member (43), a mounting plate (9) is fixedly provided on the second fixed plate (42), a strip hole (91) is provided on the mounting plate (9) along its length direction, and a locking bolt (10) is passed through the strip hole (91) for fixing the mounting plate (9) to the mounting block (8).

4. The vehicle axle housing air tightness detection device according to claim 1, characterized in that: A support (11) is slidably arranged on the workbench (1) along the length direction of the first power telescopic member (31), and the annular tube (61) is fixedly arranged on the support (11).

5. The vehicle axle housing air tightness detection device according to claim 4, characterized in that: A strip tube (12) is movably plugged into the annular tube (61); the length direction of the strip tube (12) is parallel to the axis of the annular tube (61); the interior of the strip tube (12) is connected to the interior of the annular tube (61); a second spray tube (121) connected to the interior of the strip tube (12) is provided on the strip tube (12); and a fixing assembly (13) for fixing the strip tube (12) to the annular tube (61) is provided between the strip tube (12) and the annular tube (61).

6. The vehicle bridge housing air tightness detection device according to claim 1, characterized in that: A pressure plate (14) is slidably arranged in the water tank (62) along the height direction of the water tank (62); the pressure plate (14) floats on the water surface in the water tank (62); a limit assembly (15) is arranged between the water tank (62) and the pressure plate (14); the limit assembly (15) comprises a stopper (151), a first elastic member (152) and a reset member (153); the stopper (151) is arranged in two rows, and each row comprises a plurality of stoppers arranged at intervals along the height direction of the water tank (62); a receiving groove (621) is provided on the inner wall of the water tank (62); one end of the stopper (151) is slidably arranged in the receiving groove (621) In the embodiment, the first elastic member (152) is arranged between the stopper (151) and the bottom wall of the receiving groove (621); the first elastic member (152) causes the stopper (151) to have a tendency to slide out of the receiving groove (621); an inclined surface is arranged at one end of the stopper (151) close to the inside of the water tank (62), so that when the pressure plate (14) slides toward the bottom of the water tank (62), the stopper (151) can slide into the receiving groove (621) to avoid the pressure plate (14); the reset member (153) is arranged on the stopper (151); the reset member (153) is used to drive the stopper (151) to slide into the receiving groove (621).

7. The vehicle bridge housing air tightness detection device according to claim 1, characterized in that: A first connecting pipe (16) and a second connecting pipe (17) are provided at one end of the exhaust pipe (63) away from the piston cylinder (32); the first connecting pipe (16) and the second connecting pipe (17) are both connected to the exhaust pipe (63); the first connecting pipe (16) is connected to the water tank (62); the second connecting pipe (17) is connected to the annular pipe (61); and the first connecting pipe (16) and the second connecting pipe (17) are both provided with a second valve body (18) for controlling the opening and closing of the pipeline.

8. The vehicle bridge housing air tightness detection device according to claim 7, characterized in that: A baffle (19) for closing the end of the second connecting tube (17) is slidably provided at the connection between the second connecting tube (17) and the annular tube (61), and a second elastic member (20) is provided between the baffle (19) and the second connecting tube (17), the second elastic member (20) causing the baffle (19) to press against the end of the second connecting tube (17).

9. The vehicle bridge housing air tightness detection device according to claim 7, characterized in that: A heating box (23) is provided on the pipeline of the second connecting pipe (17), and a heating element (231) is provided in the heating box (23).

10. The vehicle bridge housing air tightness detection device according to claim 1, characterized in that: A receiving tray (24) is provided on the workbench (1).

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