Gas detection leakage detection machine for brake system valve body

Abstract

The utility model relates to the technical field of automobile part detection equipment, in particular to a gas detection leakage machine for a brake system valve body, which comprises a case and a gas detection device arranged in the case and used for clamping and detecting the gas tightness of a product, and the gas detection device comprises a leakage detection mechanism, a positioning mechanism and a plugging mechanism, one end of the leak detection mechanism is in transmission connection with a lifting driving assembly, and the lifting driving mechanism is used for driving the leak detection mechanism to cooperate with the positioning mechanism to form a detection space; the leak hunting mechanism is arranged right opposite to the upper portion of the positioning mechanism. The positioning mechanism is used for fixing and plugging the bottom of the product, and a plugging mechanism is connected to the rear side of the positioning mechanism and used for plugging an opening in the rear side of the product; a jacking mechanism is in transmission connection with the bottom of the positioning mechanism and is used for driving the positioning mechanism to lift up and down to adjust the height; according to the utility model, automatic leak detection can be realized, the operation is simple and rapid, the accuracy of air tightness detection can be improved, and safe and reliable operation in a high-pressure environment can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts detection equipment, in particular to a brake system valve body gas leakage detection machine. Background Art

[0002] The brake system is a key component of the automobile safety system, and the air tightness of the brake system valve body is crucial to the performance of the entire brake system. In the production process of the control valve body used in conventional automobile brake systems, the control valve body inspection process is an extremely important link; among them, the control valve body inspection process is usually completed after the valve body is produced, mainly to check the appearance of multiple items such as whether the control valve body parts are missing and the assembly accuracy of the control valve body. At the same time, the functional (air tightness) inspection of the control valve body is also an important control process to ensure the quality of the valve body.

[0003] Traditional brake system valve body leak detection methods usually use water pressure method or bubble method. These methods are not only cumbersome to operate, but also the detection results are easily affected by many factors, resulting in low detection accuracy. Therefore, a device that can quickly and accurately detect the air tightness of the brake system valve body is needed. Utility Model Content

[0004] In order to solve the technical defects raised in the above-mentioned background technology, the purpose of the utility model is to provide a brake system valve body air leakage detection device, which can accurately detect the air tightness of the brake system valve body to ensure its safe and reliable operation under high pressure environment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gas leak detector for a brake system valve body, comprising a chassis, a gas detection device arranged in the chassis for clamping and detecting the air tightness of a product, the gas detection device comprising a leak detection mechanism, a positioning mechanism and a sealing mechanism, one end of the leak detection mechanism is transmission-connected with a lifting drive assembly, the lifting drive mechanism is used to drive the leak detection mechanism and the positioning mechanism to cooperate to form a detection space; the leak detection mechanism is arranged directly above the positioning mechanism; the positioning mechanism is used to fix and seal the bottom of the product, and is connected to a sealing mechanism at the rear side of the positioning mechanism, the sealing mechanism is used to seal the opening on the rear side of the product; the bottom of the positioning mechanism is transmission-connected with a lifting mechanism, the lifting mechanism is used to drive the positioning mechanism to lift up and down to adjust the height; a control system is also provided on the chassis, and the control system is electrically connected to each mechanism respectively.

[0007] Preferably, the positioning mechanism includes a positioning plate for fixing the product, a bottom sealing assembly embedded in the positioning plate, and a lower inner expansion block connected to the bottom of the product for inflation. The positioning plate is arranged in the middle position of the lifting drive assembly, and a clearance fit is adopted between the bottom sealing assembly and the positioning plate. The lower inner expansion block is vertically inserted into the bottom sealing assembly.

[0008] Preferably, the bottom sealing assembly includes a filling block, a sealing seat and a bottom sealing head, the filling block is provided with a plurality of elastic round pins for fixing the product, the sealing seat is embedded between the filling blocks, and a sealing ring is provided on the top of the sealing seat; the bottom sealing head is arranged corresponding to the bottom opening of the product, and the bottom sealing head is evenly distributed on the filling block and the sealing seat.

[0009] Preferably, the leakage detection mechanism includes a mounting plate, an upper internal expansion group and a reverse support assembly, the mounting plate is detachably connected to the lifting drive assembly, and a plurality of pressure rods are connected to the bottom end of the mounting plate, the plurality of pressure rods are arranged around the upper internal expansion group, and one end of the pressure rod is fixedly connected to the mounting plate, and the other end is connected to the upper clamping plate, and a tension spring is sleeved on the outer side of the pressure rod; the upper internal expansion group is used to fill the internal cavity of the product, and one end of the upper internal expansion group passes through the upper clamping plate and is fixed to the bottom end of the mounting plate, the reverse support assembly is located on the front side of the upper internal expansion group, and one end of the reverse support assembly is fixedly connected to the mounting plate.

[0010] Preferably, the blocking mechanism includes a blocking cylinder, a cylinder mounting seat and a rear blocking head assembly, the output end of the blocking cylinder passes through the cylinder mounting seat and is transmission-connected with the rear blocking head assembly, the rear blocking head assembly includes a rear guide rod, a connecting plate, a blocking plate and a rear blocking head mounting block, the rear guide rod passes through the cylinder mounting seat and extends onto the connecting plate, and the rear guide is provided with a limiting sleeve at one end of the cylinder mounting seat; a plurality of connecting plates and blocking plates are arranged at intervals, a blocking coil is connected between two adjacent connecting plates and the blocking plates, the rear blocking head mounting block passes through the connecting plate and the blocking plate at one time, and a reset spring is provided on the rear blocking head mounting block.

[0011] Preferably, the lifting drive assembly includes a support frame fixedly installed in the chassis, a lifting cylinder movably connected to the support frame, and a movable plate transmission-connected to the output end of the lifting cylinder. The support frame is composed of a base plate, a column and an upper plate. One end of the column is fixedly connected to the upper plate, and the other end is fixed to the four corners of the base plate through a mounting seat. A plurality of positioning buffer columns are arranged around the positioning mechanism of the base plate.

[0012] Preferably, a floating joint is connected between the lifting cylinder and the movable plate, and a limit assembly for preventing the movable plate from falling is provided on one side of the floating joint; a plurality of buffer rods are connected around the movable plate, the buffer rods are arranged corresponding to the positions of the positioning buffer columns, and the buffer rods are cooperatively connected with the positioning buffer columns, and L-shaped support strips are distributed in parallel between the buffer columns, and the leakage detection mechanism is slidably connected to the L-shaped support strips.

[0013] Preferably, a plurality of guide rods are connected through the movable plate and the upper plate, and guide rod seats and bearing seats are provided at the contact points between the guide rods and the movable plate and the upper plate respectively.

[0014] Preferably, the lifting mechanism includes a lifting cylinder, a cylinder mounting plate, a lifting plate and a lifting rod, the cylinder mounting plate is a U-shaped structure, and the top end of the cylinder mounting plate is fixedly connected to the workbench, the lifting cylinder is arranged on the cylinder mounting plate, and the output end of the lifting cylinder is transmission-connected to the lifting plate, the lifting rods are distributed at the four corners of the lifting plate, and one end of the lifting rod is fixed to the positioning plate through a flange seat.

[0015] Preferably, the left and right sides of the positioning mechanism are provided with through-beam sensors for detecting the level and height of the product, a marker and a product detector are respectively provided between the through-beam sensors, and a scanning mechanism for verifying product information is provided on the front side of the positioning mechanism.

[0016] In summary, the beneficial effects of the utility model are:

[0017] 1. The leak detector of the utility model quickly positions the valve body by setting a positioning mechanism, and automatically detects the brake system valve body by means of a shooting sensor and a product detector, and at the same time uses the leak detection mechanism and the sealing mechanism to seal the valve body, thereby ensuring that the brake system valve body is in a relatively sealed state when performing air tightness detection, thereby being able to accurately detect the air tightness of the brake system valve body and ensure its safe and reliable operation under high pressure environments; in addition, by setting a lifting mechanism and a lifting drive assembly, the air tightness detection machine can be adjusted to brake system valve bodies of different sizes, thereby improving its scope of application.

[0018] 2. The utility model realizes automatic leak detection by intelligently controlling gas flow and pressure through the control system, reducing the influence of human factors on the detection results. At the same time, it is equipped with data storage and management functions, which is convenient for users to record and query historical detection data and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model brake system valve body gas leakage detection machine;

[0020] Figure 2It is a structural schematic diagram of the gas detection device in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the leakage detection mechanism in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the positioning mechanism in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the blocking mechanism in the utility model;

[0024] Figure 6 It is a structural schematic diagram of the lifting drive assembly in the utility model;

[0025] Figure 7 It is a structural schematic diagram of the jacking mechanism in the utility model;

[0026] Figure 8 It is a structural schematic diagram of the through-beam sensor, the marker and the product detector in the utility model;

[0027] Fig. 9 It is a structural schematic diagram of the code scanning mechanism in the utility model.

[0028] Description of reference numerals in the figures:

[0029] 1. Chassis; 11. Workbench; 12. Control system; 2. Lifting drive assembly; 21. Support frame; 211. Bottom plate; 212. Column; 213. Upper plate; 22. Lifting cylinder; 23. Movable plate; 24. Positioning buffer column; 25. Floating joint; 26. Limiting assembly; 27. Buffer rod; 28. L-shaped support strip; 29. ​​Guide rod; 291. Guide rod seat; 292. Bearing seat; 3. Leakage detection mechanism; 31. Mounting plate; 32. Upper internal expansion group; 33. Reverse support assembly; 34. Pressure rod; 35. Upper clamping plate; 36. Tension spring; 4. Positioning mechanism; 41. Positioning plate; 42. Bottom blocking assembly; 421. Filling block; 422. Blocking seat; 423. Bottom plugging head; 424, elastic round pin; 425, sealing ring; 43, lower inner expansion block; 5, lifting mechanism; 51, lifting cylinder; 52, cylinder mounting plate; 53, lifting plate; 54, lifting rod; 6, through-beam sensor; 7, marker; 8, product detector; 9, code scanning mechanism; 91, code scanning gun mounting plate; 92, code scanning gun sensor; 93, driving electric cylinder; 10, plugging mechanism; 101, plugging cylinder; 102, cylinder mounting seat; 103, rear side plugging head assembly; 1031, rear side guide rod; 1032, connecting plate; 1033, plugging plate; 1034, rear plugging head mounting block; 1035, limit sleeve; 1036, plugging coil; 1037, reset spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0031] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0032] In the description of the utility model, if there is a word description such as "several", it means one or more, and the meaning of "more" is two or more. Greater than, less than, and more than are understood to exclude the number itself, and above, below, and within are understood to include the number itself. If there is a description of the first, second, and third, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] The following is combined with Figure 1-9 , an embodiment of the utility model of a brake system valve body air leakage detection machine is further described in detail.

[0034] A brake system valve body gas leakage detection machine, such as Figure 1 , 2 As shown, it includes a chassis 1, and a gas detection device arranged in the chassis 1 for clamping and detecting the air tightness of the product. The gas detection device includes a leak detection mechanism 3, a positioning mechanism 4 and a sealing mechanism 10. One end of the leak detection mechanism 3 is transmission-connected with a lifting drive assembly 2, and the lifting drive mechanism is used to drive the leak detection mechanism 3 and the positioning mechanism 4 to cooperate to form a detection space; the leak detection mechanism 3 is arranged directly above the positioning mechanism 4; the positioning mechanism 4 is used to fix and seal the bottom of the product, and is connected to a sealing mechanism 10 at the rear side of the positioning mechanism 4, and the sealing mechanism 10 is used to seal the opening on the rear side of the product; the bottom of the positioning mechanism 4 is transmission-connected with a lifting mechanism 5, and the lifting mechanism 5 is used to drive the positioning mechanism 4 to rise and fall to adjust the height; a control system 12 is also provided on the chassis 1, and the control system 12 is electrically connected to each mechanism respectively.

[0035] Specifically, when the air leakage detection machine is working, the control valve body used in the brake system is first fixed on the positioning mechanism 4. Then, when performing the air tightness test, the control system 12 on the chassis 1 controls the sealing mechanism to seal all the openings or cavities on the product. In this way, the air tightness of the product can be measured more accurately. During sealing, the leakage detection mechanism 3 rises and falls under the action of the lifting drive assembly 2 to facilitate the leakage detection mechanism 3 to seal the internal cavity of the product. When the product is placed on the positioning mechanism 4, the openings in the bottom part are sealed by the positioning mechanism 4. At the same time, the sealing mechanism 10 placed on the rear side of the positioning mechanism 4 also seals the openings on the rear side of the product, so that the product forms a sealed state. Then, gas is filled in the product to detect whether the product is leaking, and then detect the air tightness of the product.

[0036] It should be noted that a workbench 11 is provided in the chassis 1, and the leak detection mechanism 3, the positioning mechanism 4, the blocking mechanism 10 and the lifting drive assembly 2 are all fixed on the workbench 11, and the lifting mechanism 5 is provided at the bottom of the workbench 11. When working, the lifting drive assembly 2 and the lifting mechanism 5 respectively control and adjust the height of the leak detection mechanism 3 and the positioning mechanism 4, so that they can be pressed together to form a relatively sealed environment, ensuring that no leakage occurs during the detection process.

[0037] In this embodiment, if Figure 4 As shown, the positioning mechanism 4 includes a positioning plate 41 for fixing the product, a bottom sealing component 42 which is engaged and connected to the positioning plate 41, and a lower inner expansion block 43 which is connected to the bottom of the product for inflation. The positioning plate 41 is arranged in the middle position of the bottom plate 211, and a clearance fit is adopted between the bottom sealing component 42 and the positioning plate 41, and the lower inner expansion block 43 is vertically inserted into the bottom sealing component 42; the bottom sealing component 42 includes a filling block 421, a sealing seat 422 and a bottom sealing head 423, a plurality of elastic round pins 424 for fixing the product are arranged on the filling block 421, the sealing seat 422 is embedded between the filling blocks 421, and a sealing ring 425 is arranged on the top of the sealing seat 422; the bottom sealing head 423 is arranged corresponding to the bottom opening of the product, and the bottom sealing heads 423 are evenly distributed on the filling block 421 and the sealing seat 422.

[0038] Specifically, since the product is provided with a plurality of openings and cavities, the openings and cavities need to be sealed during the air tightness test so that the test results can be more accurate. When the positioning mechanism 4 is used to position the product, the shape of the filling body is set to match the product, so that the bottom sealing head 423 on the filling body seals the openings at the bottom of the product. At the same time, the elastic round pin 424 will be fixed to the product to prevent the product from shifting during the test. Finally, the product is inflated through the lower inner expansion block 43, and the air tightness of the product is determined by detecting whether there is leakage in the product.

[0039] In this embodiment, if Figure 3 As shown, the leakage detection mechanism 3 includes a mounting plate 31, an upper internal expansion group 32 and a reverse support assembly 33. The mounting plate 31 is detachably connected to the lifting drive assembly 2, and a plurality of pressure rods 34 are connected to the bottom end of the mounting plate 31. The plurality of pressure rods 34 are arranged around the upper internal expansion group 32, and one end of the pressure rod 34 is fixedly connected to the mounting plate 31, and the other end is connected to an upper clamping plate 35. A tension spring 36 is sleeved on the outer side of the pressure rod 34. The upper internal expansion group 32 is used to fill the internal cavity of the product, and one end of the upper internal expansion group 32 passes through the upper clamping plate 35 and is fixed to the bottom end of the mounting plate 31. The reverse support assembly 33 is located at the front side of the upper internal expansion group 32, and one end of the reverse support assembly 33 is fixedly connected to the mounting plate 31.

[0040] Specifically, the leak detection mechanism 3 is slidably connected to the L-shaped card strip through the mounting plate 31. When the products have different specifications and sizes, the sizes of the internal cavities of the products are also different. Therefore, the upper internal expansion group 32 suitable for the internal cavity of the product can be selected by disassembling and replacing the leak detection mechanism 3 to improve its application range. At the same time, the mounting plate 31 is more convenient to disassemble and replace by a sliding connection, and a handle is provided on one side of the mounting plate 31. The purpose of providing the handle is to facilitate the operator to replace the leak detection mechanism 3 by pulling the handle; the upper internal expansion group 32 is set according to the number of cavities of the product, and the head of the upper internal expansion group 32 is a plurality of rings. The upper inner expansion group 32 is stacked and arranged in a stacked manner, and a plurality of sealing rings are embedded between adjacent rings, so that when the upper inner expansion group 32 is sealed in the internal cavity of the product, a gap that affects its detection result is avoided; the pressure rod 34 arranged between the mounting plate 31 and the upper clamping plate 35 can be adjusted accordingly according to the depth of the internal cavity of the product, and during the adjustment process, the tension spring 36 located on the outside of the pressure rod 34 can automatically adapt to the tension of the pressure rod 34, and at the same time, the reverse support component 33 can be used to fix and support the upper inner expansion group 32. The reverse support component 33 adopts a reverse L-shaped support structure. When the upper inner expansion group 32 is filled into the product, the reverse support component 33 abuts against the outer wall of the product for fixation.

[0041] In this embodiment, if Figure 5As shown, the blocking mechanism 10 includes a blocking cylinder 101, a cylinder mounting seat 102 and a rear blocking head assembly 103. The output end of the blocking cylinder 101 passes through the cylinder mounting seat 102 and is transmission-connected to the rear blocking head assembly 103. The rear blocking head assembly 103 includes a rear guide rod 1031, a connecting plate 1032, a blocking plate 1033 and a rear blocking head mounting block 1034. The rear guide rod 1031 passes through the cylinder mounting seat 102 and extends to connect The plate 1032 is on the rear guide, and a limit sleeve 1035 is sleeved on one end of the cylinder mounting seat 102; a plurality of connecting plates 1032 and sealing plates 1033 are arranged at intervals, and a sealing coil 1036 is connected between two adjacent connecting plates 1032 and sealing plates 1033; the rear plug mounting block 1034 passes through the connecting plate 1032 and the sealing plate 1033 at one time, and a return spring 1037 is sleeved on the rear plug mounting block 1034.

[0042] Specifically, when the rear side of the product is blocked, the blocking cylinder 101 drives the rear guide rod 1031 to extend and retract forward and backward, thereby driving the connecting plate 1032 and the blocking plate 1033 to move, and blocking the rear plug mounting block 1034 in the rear opening of the product. There are multiple rear plug mounting blocks 1034, and the multiple rear plug mounting blocks 1034 are arranged equidistantly up and down. During the blocking process, in order to ensure that the rear plug mounting block 1034 can accurately match the rear opening of the product, the blocking coil 1036 between the connecting plate 1032 and the blocking plate 1033 can accurately control the movement of a single rear plug mounting block 1034, and the reset spring 1037 mounted on the rear plug mounting block 1034 is to reserve a deformation margin during blocking.

[0043] In this embodiment, if Figure 6 As shown, the lifting drive assembly 2 includes a support frame 21 fixedly mounted on the workbench 11, a lifting cylinder 22 movably connected to the support frame 21, and a movable plate 23 drivingly connected to the output end of the lifting cylinder 22. The support frame 21 is composed of a bottom plate 211, a column 212 and an upper plate 213. One end of the column 212 is fixedly connected to the upper plate 213, and the other end is fixed to the four corners of the bottom plate 211 through a mounting seat. The bottom plate 211 is provided with a plurality of positioning buffer columns 24 around the positioning mechanism 4; a floating joint 25 is connected between the lifting cylinder 22 and the movable plate 23. A limit assembly 26 for preventing the movable plate 23 from falling is provided on one side of the floating joint 25. A plurality of buffer rods 27 are connected around the movable plate 23. The buffer rods 27 are arranged corresponding to the positions of the positioning buffer columns 24, and the buffer rods 27 are cooperatively connected with the positioning buffer columns 24. L-shaped support strips 28 are distributed in parallel between the buffer columns, and the leakage detection mechanism 3 is slidably connected to the L-shaped support strips 28. A plurality of guide rods 29 are connected through the movable plate 23 and the upper plate 213, and guide rod seats 291 and bearing seats 292 are provided at the joints between the guide rods 29 and the movable plate 23 and the upper plate 213, respectively.

[0044] Specifically, the lifting drive assembly 2 plays a role of stabilization and fixing, and can also drive the movable plate 23 to drive the leakage detection mechanism 3 to move up and down through the lifting cylinder 22. During the lifting process, when the output end of the lifting cylinder 22 extends, it pushes the floating joint 25 to press the movable plate 23 downward, and at the same time, the guide rod 29 connected between the movable plate 23 and the upper plate 213 guides synchronously, and makes the positioning buffer column 24 on the movable plate 23 coincide with the buffer rod 27 fixed on the bottom plate 211, so as to limit the descending height; and in the process of descent, the limit assembly 26 can limit the movable plate 23 to avoid the risk of it falling; wherein, the limit The positioning assembly 26 includes a locking push rod arranged on the floating joint 25 and a locking seat arranged on the upper plate 213. The locking seat is provided with a locking hole. When the leakage detection mechanism 3 is in the ascending state, the locking push rod temporarily locks the leakage detection mechanism 3 by extending the movable rod into the locking hole; the support frame 21 adopts the column 212 to be supported between the bottom plate 211 and the upper plate 213 respectively, so that it forms a frame with good stability, and an engaging groove is provided on the top end of the buffer rod 27 arranged around the positioning mechanism 4 on the bottom. The buffer column can fall into the engaging groove when descending to avoid wear or deviation during long-term contact, so as to limit the descending height of the leakage detection mechanism 3 according to the height of the product.

[0045] In this embodiment, if Figure 7 As shown, the lifting mechanism 5 includes a lifting cylinder 51, a cylinder mounting plate 52, a lifting plate 53 and a lifting rod 54. The cylinder mounting plate 52 is a U-shaped structure, and the top end of the cylinder mounting plate 52 is fixedly connected to the workbench 11. The lifting cylinder 51 is arranged on the cylinder mounting plate 52, and the output end of the lifting cylinder 51 is transmission-connected to the lifting plate 53. The lifting rods 54 are distributed at the four corners of the lifting plate 53, and one end of the lifting rod 54 is fixed to the positioning plate 41 through a flange seat.

[0046] Specifically, when the height of the positioning mechanism 4 is adjusted, the lifting mechanism 5 is used to lift the positioning plate 41, so that the positioning mechanism 4 can position products of different sizes. The lifting cylinder 51 drives the lifting plate 53 to rise and fall, thereby driving the lifting rod 54 to lift the positioning mechanism 4. The lifting rod 54 adopts a telescopic structure, and a flange seat is set at one end connected to the positioning plate 41 for fixation. In addition to the cylinder transmission method, the lifting mechanism 5 can also use other drives with lifting functions, which are not limited here.

[0047] In this embodiment, if Figure 8 , 9As shown, the left and right sides of the positioning mechanism 4 are provided with through-beam sensors 6 for detecting the level and height of the product, a marker 7 and a product detector 8 are respectively provided between the through-beam sensors 6, and the front side of the positioning mechanism 4 is provided with a code scanning mechanism 9 for verifying product information.

[0048] Specifically, the code scanning mechanism 9 is located at the front side of the positioning mechanism 4, and the code scanning mechanism 9 includes a code scanning gun mounting plate 91, a code scanning gun sensor 92 and a driving electric cylinder 93. The code scanning gun mounting plate 91 is in a bow-shaped structure, and the bottom end of the code scanning gun mounting plate 91 is transmission-connected to the driving electric cylinder 93. The information position of the product corresponding to the code scanning gun sensor 92 is set at the upper and lower ends of the code scanning gun mounting plate 91; it performs network scanning through the code scanning gun sensor 92 and records the information into the control system 12, so that the product information and air tightness test result information can be accurately verified, and the code scanning gun mounting plate 91 is set in a bow shape to facilitate the installation of the code scanning gun sensor 92. At the same time, the code scanning gun mounting plate 91 can also adjust its position according to the height of the product using the driving electric cylinder 93 to improve its scope of application.

[0049] It is worth mentioning that the through-beam sensor 6 in the present invention uses infrared ray emission for detection. The through-beam infrared ray can detect whether the leak detection mechanism 3 on the upper part of the product is in place when blocking the product. At the same time, it can also feedback information to the control system 12 according to the level and height inside the detected product, so that the control system 12 controls the frame to form the height of the leak detection mechanism 3. The product detector 8 uses a reflective photoelectric sensor. The photoelectric sensor can use the light emitted by the light source to be reflected by the object to be detected and received by the photosensitive element, and then obtain the required information through the processing of the relevant circuit. It can be used to detect the changes in the brightness and color of the ground, and can also detect whether there are approaching products. In the present invention, the product detector 8 is arranged parallel to the surface of the product, and the product detector 8 is located between the two through-beam sensors 6 on the right. The purpose of this arrangement is to avoid mutual influence and save installation space. In addition, the marker 7 located on the left side of the positioning mechanism 4 uses a kind of adhesive label paper, or a photoetchable engraving machine, which marks the model and detection date of the product by marking the product.

[0050] The working principle of this utility model:

[0051] When inspecting the control valve body in the automobile brake system, the product is placed on the positioning mechanism 4, and the control system 12 controls the product detector 8 to detect whether the product is installed on the positioning mechanism 4, and then further detects whether the installation position of the product is qualified through the shooting sensor 6, and then the marker 7 puts a label on the product, and the scanning mechanism 9 verifies the product information and records the test results; when the product is tested for air tightness, the leak detection mechanism 3 is pressed down onto the product under the action of the lifting cylinder 22, wherein the upper inner expansion group 32 is filled into the cavity of the control valve product, and at the same time, the rear side sealing head assembly 103 of the sealing mechanism 10 seals the opening on the rear side of the control valve product under the action of the sealing cylinder 101 to avoid gas leakage during detection and affect the test results. In addition, the positioning mechanism 4 seals the opening at the bottom of the control valve product, and at the same time fills gas into the product, and detects the air tightness of the control valve product in real time, thereby quickly completing the product inspection.

[0052] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. 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 brake system valve body gas leakage detection machine, comprising a chassis, a gas detection device arranged in the chassis for clamping and detecting the air tightness of the product, characterized in that: The gas detection device includes a leak detection mechanism, a positioning mechanism and a sealing mechanism. One end of the leak detection mechanism is transmission-connected with a lifting drive assembly, and the lifting drive mechanism is used to drive the leak detection mechanism and the positioning mechanism to cooperate to form a detection space; the leak detection mechanism is arranged directly above the positioning mechanism; the positioning mechanism is used to fix and seal the bottom of the product, and the sealing mechanism is connected to the rear side of the positioning mechanism, and the sealing mechanism is used to seal the opening on the rear side of the product; the bottom of the positioning mechanism is transmission-connected with a lifting mechanism, and the lifting mechanism is used to drive the positioning mechanism to rise and fall to adjust the height; a control system is also arranged on the chassis, and the control system is electrically connected to each mechanism respectively.

2. The brake system valve body air leakage detector according to claim 1, characterized in that: The positioning mechanism includes a positioning plate for fixing the product, a bottom sealing component embedded in the positioning plate, and a lower inner expansion block connected to the bottom of the product for inflation. The positioning plate is arranged in the middle position of the lifting drive component, and a clearance fit is adopted between the bottom sealing component and the positioning plate. The lower inner expansion block is vertically inserted into the bottom sealing component.

3. The brake system valve body air leakage detector according to claim 2, characterized in that: The bottom sealing assembly includes a filling block, a sealing seat and a bottom sealing head. The filling block is provided with a plurality of elastic round pins for fixing the product. The sealing seat is embedded between the filling blocks, and a sealing ring is provided on the top of the sealing seat. The bottom sealing head is arranged corresponding to the bottom opening of the product, and the bottom sealing head is evenly distributed on the filling block and the sealing seat.

4. The brake system valve body air leakage detector according to claim 3, characterized in that: The leakage detection mechanism includes a mounting plate, an upper internal expansion group and a reverse support assembly. The mounting plate is detachably connected to the lifting drive assembly, and a plurality of pressure rods are connected to the bottom end of the mounting plate. The plurality of pressure rods are arranged around the upper internal expansion group, and one end of the pressure rod is fixedly connected to the mounting plate, and the other end is connected to the upper clamping plate. A tension spring is sleeved on the outer side of the pressure rod; the upper internal expansion group is used to fill the internal cavity of the product, and one end of the upper internal expansion group passes through the upper clamping plate and is fixed to the bottom end of the mounting plate. The reverse support assembly is located on the front side of the upper internal expansion group, and one end of the reverse support assembly is fixedly connected to the mounting plate.

5. The brake system valve body air leakage detector according to claim 4, characterized in that: The blocking mechanism includes a blocking cylinder, a cylinder mounting seat and a rear blocking head assembly, the output end of the blocking cylinder passes through the cylinder mounting seat and is transmission-connected with the rear blocking head assembly, the rear blocking head assembly includes a rear guide rod, a connecting plate, a blocking plate and a rear blocking head mounting block, the rear guide rod passes through the cylinder mounting seat and extends onto the connecting plate, and a limiting sleeve is provided at one end of the rear guide seat. There are a plurality of connecting plates and blocking plates arranged at intervals, a blocking coil is connected between two adjacent connecting plates and the blocking plates, the rear blocking head mounting block passes through the connecting plate and the blocking plate once, and a reset spring is provided on the rear blocking head mounting block.

6. The brake system valve body air leakage detector according to claim 5, characterized in that: The lifting drive assembly includes a support frame fixedly installed in the chassis, a lifting cylinder movably connected to the support frame, and a movable plate drivingly connected to the output end of the lifting cylinder. The support frame is composed of a base plate, a column and an upper plate. One end of the column is fixedly connected to the upper plate, and the other end is fixed to the four corners of the base plate through a mounting seat. A plurality of positioning buffer columns are arranged around the base plate around the positioning mechanism.

7. The brake system valve body air leakage detector according to claim 6, characterized in that: A floating joint is connected between the lifting cylinder and the movable plate, and a limit assembly for preventing the movable plate from falling is provided on one side of the floating joint; a plurality of buffer rods are connected around the movable plate, the buffer rods are arranged corresponding to the positions of the positioning buffer columns, and the buffer rods are cooperatively connected with the positioning buffer columns, and L-shaped support strips are distributed in parallel between the buffer columns, and the leakage detection mechanism is slidably connected to the L-shaped support strips.

8. The brake system valve body air leakage detector according to claim 7, characterized in that: A plurality of guide rods are connected through the movable plate and the upper plate, and guide rod seats and bearing seats are respectively arranged at the abutment positions of the guide rods with the movable plate and the upper plate.

9. The brake system valve body air leakage detector according to claim 8, characterized in that: The jacking mechanism includes a jacking cylinder, a cylinder mounting plate, a jacking plate and a jacking rod. The cylinder mounting plate is a U-shaped structure, and the top end of the cylinder mounting plate is fixedly connected to the workbench. The jacking cylinder is arranged on the cylinder mounting plate, and the output end of the jacking cylinder is transmission-connected to the jacking plate. The jacking rods are distributed at the four corners of the jacking plate, and one end of the jacking rod is fixed to the positioning plate through a flange seat.

10. The brake system valve body air leakage detector according to claim 9, characterized in that: The left and right sides of the positioning mechanism are provided with through-beam sensors for detecting the level and height of the product, a marker and a product detector are provided between the through-beam sensors, and a code scanning mechanism for verifying product information is provided on the front side of the positioning mechanism.

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