Detection device

Abstract

The application discloses a detection device. The detection device is used for detecting the air tightness of a master cylinder. The master cylinder comprises four through holes communicating with four inner cavities. The detection device comprises a mounting frame and a clamping and fixing assembly which is detachably connected to the mounting frame. The clamping and fixing assembly comprises at least two clamping pieces which are oppositely arranged and used for clamping the master cylinder. A sealing detection assembly is mounted on the mounting frame and located on one side of the axis direction of each through hole. The sealing detection assembly comprises a sealing piece, a detection piece and a driving piece. The sealing piece and the driving piece are drivingly connected. The driving piece drives the sealing piece to be sealingly connected in the through hole or drives the sealing piece to be away from the through hole. The detection piece is arranged on one side of the top of the master cylinder and used for detecting the air tightness of the master cylinder. Thus, the detection device provided by the application can be used for detecting the air tightness of the master cylinder of different specifications and can improve the detection efficiency and accuracy.

Description

Technical Field

[0001] This application belongs to the field of master cylinder testing technology, specifically relating to a testing device. Background Technology

[0002] The airtightness of the master cylinder directly affects the movement of related products and components. For example, when the master cylinder is used in a vehicle's vacuum booster, the airtightness test of the master cylinder is a key step in determining the braking effect of the vehicle's braking system.

[0003] Currently, the main cylinder is mainly inspected manually. Different specifications of vacuum boosters include different specifications of main cylinders, and manual switching is required when inspecting different specifications of main cylinders. This not only leads to low inspection efficiency, but also easily results in poor inspection accuracy. Utility Model Content

[0004] The purpose of this application is to provide a detection device that can solve the problems in the prior art where the detection of the airtightness of the master cylinder is not only inefficient but also prone to poor accuracy.

[0005] To address the aforementioned technical problems, this utility model provides a detection device for detecting the airtightness of a master cylinder. The master cylinder includes four through holes communicating with the inner cavity. The detection device includes: Mounting rack; A clamping and fixing assembly is detachably connected to the mounting bracket. The clamping and fixing assembly includes at least two opposing clamping members, which are used to clamp the master cylinder. A sealing detection assembly is mounted on the mounting bracket, and each sealing detection assembly is located on one side of the through hole axis. The sealing detection assembly includes a seal, a detection element, and a driving element. The seal and the driving element are driven to connect. The driving element drives the seal to seal in the through hole or drives the seal away from the through hole. The detection element is disposed on the top side of the master cylinder and is used to detect the airtightness of the master cylinder.

[0006] Optionally, the clamping and fixing assembly includes a traveling clamp and a positioning fixture. The traveling clamp includes a support base and at least two clamping elements. The positioning fixture includes a positioning tray with at least two positioning parts. The support base is fixed to the positioning tray through the positioning parts.

[0007] Optionally, at least two of the positioning parts include a central positioning part and an auxiliary positioning part. The central positioning part is disposed in the middle of the positioning tray, and the auxiliary positioning part is disposed at the edge of the positioning tray and located around the central positioning part. The support base is mounted on the positioning tray through the central positioning part and the auxiliary positioning part.

[0008] Optionally, the support base has a positioning through hole in the middle, the central positioning part protrudes from the surface of the positioning plate facing the accompanying clamp, and the central positioning part is inserted into the positioning through hole.

[0009] Optionally, the positioning fixture further includes an auxiliary fixture, which is installed on the end of the central positioning part away from the positioning support plate, and the end of the auxiliary fixture away from the positioning support plate abuts against the end of the master cylinder.

[0010] Optionally, the end of the auxiliary tooling away from the positioning tray is a buffer ball head.

[0011] Optionally, the auxiliary positioning part includes a first protrusion and a second protrusion; The first protrusion is disposed on the surface of the positioning tray facing the accompanying fixture. The second protrusion and the second protrusion are stacked. The first protrusion is located between the second protrusion and the positioning tray. The first protrusion, the second protrusion and the positioning tray form a positioning groove. The edge of the support seat is engaged in the positioning groove.

[0012] Optionally, the auxiliary positioning part may further include a locking screw; The locking screw is sequentially threaded onto the second protrusion, the second protrusion, and the positioning plate.

[0013] Optionally, a first support member and a second support member are further provided on the surface of the positioning plate facing the support base, the first support member and the second support member being used to fix the piston included in the master cylinder.

[0014] Optionally, the detection device further includes a lifting assembly; The lifting assembly is mounted on the mounting bracket and located at the bottom of the positioning tray. The lifting assembly includes a lifting member and a connecting plate. The connecting plate is connected to the end of the lifting member facing the positioning tray. The lifting member moves in a direction close to or away from the positioning tray. When the lifting member moves in a direction close to the positioning tray, the connecting plate and the positioning tray are connected. When the lifting member moves in a direction away from the positioning tray, the connecting plate and the positioning tray are separated.

[0015] Optionally, the lifting component includes a first cylinder and a push rod, one end of the push rod being connected to the piston rod of the first cylinder, and the other end of the push rod being fixed to the connecting plate.

[0016] Optionally, the push rod includes a first rod, a second rod, and a third rod. One end of the first rod is connected to the piston rod of the first cylinder, and the other end of the first rod is fixed to the connecting plate. The second rod and the third rod are movably connected to both sides of the axis of the first rod. The ends of the second rod facing the positioning plate and the ends of the third rod facing the positioning plate are both fixed to the connecting plate. The ends of the second rod away from the positioning plate and the ends of the third rod away from the positioning plate are both free ends.

[0017] Optionally, the lifting assembly further includes a mounting plate, on which the first cylinder is mounted. A first linear bearing and a second linear bearing are respectively mounted on the mounting plate. The end of the second rod away from the positioning plate passes through the first linear bearing, and the end of the third rod away from the positioning plate passes through the second linear bearing.

[0018] Optionally, the end of the second rod facing the positioning tray and the end of the third rod facing the positioning tray are respectively fixed to two ends of the connecting plate in the length direction away from the positioning tray.

[0019] Optionally, the accompanying clamp may further include an elastic element and a support rod; One end of the elastic element is connected to the clamping element, and the other end of the elastic element is connected to the support rod. The end of the support rod away from the clamping element is fixed on the support base, and the elastic element is in an elastically compressed state.

[0020] Optionally, the clamping member includes a first clamping block and a second clamping block connected together, the first clamping block being connected to the elastic member, and the end face of the second clamping block facing the main cylinder being an arc surface.

[0021] Optionally, the sealing detection assembly further includes a connecting frame, and the driving component is a second cylinder; The connecting bracket is mounted on the mounting bracket, the second cylinder is mounted on the connecting bracket, and the piston rod of the second cylinder is connected to the seal.

[0022] Optionally, the detection device further includes a linear transmission element that moves along an axis perpendicular to the main cylinder, and the clamping and fixing assembly is connected to the linear transmission element.

[0023] As can be seen from the above embodiments, in this application embodiment, since the clamping and fixing assembly is detachably connected to the mounting frame, and the clamping and fixing assembly includes at least two clamping members arranged opposite to each other, and at least two clamping members are used to clamp the main cylinder, the main cylinder can be clamped by at least two clamping members, so that the position of the main cylinder is kept fixed, which is convenient for subsequent air tightness testing of the main cylinder. Moreover, when the specification of the main cylinder changes, it is only necessary to remove the clamping and fixing assembly from the mounting frame and replace it with a clamping and fixing assembly that is compatible with the main cylinder, so as to complete the adaptation with the main cylinder of different specifications and facilitate the fixing of the main cylinder of different specifications. Furthermore, since the sealing detection components are mounted on the mounting bracket, and each sealing detection component is located on one side of a through-hole axis, the sealing detection component includes a seal, a detection component, and a driving component. The seal and the driving component are driven together. The driving component drives the seal to seal within the through-hole or drives the seal away from the through-hole. The detection component is located on the top side of the main cylinder and is used to detect the airtightness of the main cylinder. Therefore, after the main cylinder position is fixed, the driving component can drive the seal to seal within each through-hole of the main cylinder, forming a sealed space inside the main cylinder, facilitating subsequent airtightness testing of the main cylinder using the detection component. After the detection component completes the airtightness test of the main cylinder, the driving component can drive the seal away from the through-hole to prepare for the airtightness test of the next main cylinder. Thus, when testing the airtightness of the main cylinder using the testing device provided in this application embodiment, not only can main cylinders of different specifications be fixed, facilitating the testing device's adaptation to different specifications and improving its adaptability, but also, during the entire testing process, the sealing and testing components can automatically complete the sealing and testing of the main cylinder's inner cavity, making the entire testing process more efficient. Furthermore, since the main cylinder is always fixed by the clamping and fixing components throughout the testing process, there will be no loss of airtightness testing accuracy due to main cylinder movement, further improving the testing device's accuracy. In summary, testing the airtightness of the main cylinder using the testing device provided in this application embodiment not only adapts to main cylinders of different specifications but also improves testing efficiency and accuracy. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the detection device provided in the embodiments of this application; Figure 2This is a schematic diagram of the accompanying fixture included in the detection device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the positioning fixture included in the detection device provided in the embodiments of this application; Figure 4 This is a cross-sectional view of the clamping and fixing components included in the detection device provided in the embodiments of this application; Figure 5 This is a schematic diagram of the sealing detection component included in the detection device provided in the embodiments of this application; Figure 6 This is a schematic diagram of the lifting component included in the detection device provided in the embodiments of this application.

[0026] Figure label: 1: Mounting bracket; 2: Clamping and fixing assembly; 21: Accompanying fixture; 211: Support base; 2111: Positioning through hole; 212: Clamping element; 2121: First clamping block; 2122: Second clamping block; 213: Elastic element; 214: Support rod; 22: Positioning fixture; 221: Positioning tray; 222: Central positioning part; 223: Auxiliary positioning part; 2231: First protrusion; 2232: Second protrusion; 2233: Locking screw; 224: Auxiliary fixture; 2241: Buffer ball head; 225: First support member; 226: Second support member; 3: Sealing detection assembly; 31: Seal; 32: Drive component; 33: Connecting frame; 4: Lifting assembly; 41: Lifting component; 411: First cylinder; 412: First rod; 413: Second rod; 414: Third rod; 42: Connecting plate; 43: Mounting plate; 44: First linear bearing; 45: Second linear bearing; 5: Linear transmission component; 10: Master cylinder. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The detection device of this utility model embodiment will now be described in detail with reference to the accompanying drawings.

[0030] Firstly, such as Figures 1 to 6 As shown, this utility model embodiment provides a detection device for detecting the airtightness of the main cylinder 10. The main cylinder 10 includes four through holes that connect the inner cavities. The detection device includes a mounting bracket 1, a clamping and fixing assembly 2, and a sealing detection assembly 3.

[0031] The clamping and fixing assembly 2 is detachably connected to the mounting bracket 1. The clamping and fixing assembly 2 includes at least two clamping members 212 arranged opposite to each other, and the at least two clamping members 212 are used to clamp the master cylinder 10.

[0032] The sealing detection assembly 3 is mounted on the mounting bracket 1, and each sealing detection assembly 3 is located on one side of the through hole axis. The sealing detection assembly 3 includes a seal 31, a detection element and a driving element 32. The seal 31 and the driving element 32 are driven to connect. The driving element 32 drives the seal 31 to seal in the through hole, or drives the seal 31 away from the through hole. The detection element is set on the top side of the main cylinder 10 and is used to detect the airtightness of the main cylinder 10.

[0033] As can be seen from the above embodiments, in this application embodiment, since the clamping and fixing assembly 2 is detachably connected to the mounting frame 1, the clamping and fixing assembly 2 includes at least two clamping members 212 arranged opposite to each other. The at least two clamping members 212 are used to clamp the main cylinder 10. Therefore, not only can the main cylinder 10 be clamped by at least two clamping members 212, so that the position of the main cylinder 10 is kept fixed, which is convenient for subsequent air tightness testing of the main cylinder 10, but when the specifications of the main cylinder 10 change, it is only necessary to remove the clamping and fixing assembly 2 from the mounting frame 1 and replace it with a clamping and fixing assembly 2 that is compatible with the main cylinder 10, so as to complete the adaptation with the main cylinder 10 of different specifications, which is convenient for fixing the main cylinder 10 of different specifications. Since the sealing detection assembly 3 is mounted on the mounting bracket 1, and each sealing detection assembly 3 is located on one side of the through hole axis, the sealing detection assembly 3 includes a sealing element 31, a detection element, and a driving element 32. The sealing element 31 and the driving element 32 are driven together. The driving element 32 drives the sealing element 31 to seal and connect in the through hole, or drives the sealing element 31 away from the through hole. The detection element is located on the top side of the main cylinder 10 and is used to detect the airtightness of the main cylinder 10. Therefore, after the position of the main cylinder 10 is fixed, the driving element 32 can drive the sealing element 31 to seal and connect in each through hole of the main cylinder 10, so that the inner cavity of the main cylinder 10 forms a sealed space, which facilitates the subsequent detection of the airtightness of the main cylinder 10 by the detection element. After the detection element completes the airtightness test of the main cylinder 10, the driving element 32 can drive the sealing element 31 away from the through hole to prepare for the airtightness test of the next main cylinder 10. Thus, when testing the airtightness of the main cylinder 10 using the testing device provided in this embodiment, not only can main cylinders 10 of different specifications be fixed, facilitating the testing device's adaptation to different specifications and improving its adaptability, but also, during the entire testing process, the sealing and testing component 3 can automatically complete the sealing and testing of the inner cavity of the main cylinder 10, making the entire testing process more efficient. Furthermore, since the main cylinder 10 is always fixed by the clamping and fixing component 2 throughout the testing process, there will be no loss of airtightness testing accuracy due to movement of the main cylinder 10, further improving the testing accuracy of the device. In summary, testing the airtightness of the main cylinder 10 using the testing device provided in this embodiment not only adapts to main cylinders 10 of different specifications but also improves testing efficiency and accuracy.

[0034] In this embodiment, the main cylinder 10 is primarily the braking component of the vacuum booster, mainly converting mechanical energy into hydraulic energy. The through-holes on the main cylinder 10 may include a compensation hole, an inlet hole, an outlet hole, and an exhaust hole. During testing, all four through-holes on the main cylinder 10 need to be blocked simultaneously to form a sealed cavity inside the main cylinder 10. Therefore, a sealing detection component 3 needs to be installed in each through-hole.

[0035] Mounting bracket 1 is a frame structure that may include multiple crossbeams and multiple longitudinal beams to form an installation space for fixing the clamping and fixing assembly 2 and the sealing detection assembly 3. The clamping and fixing assembly 2 can be an integral structure or a split structure. The clamping and fixing assembly 2 can form any structure such as a frame structure, a disc structure, or a column structure; this embodiment does not limit this. The clamping and fixing assembly 2 can be detachably connected to the mounting bracket 1 through any method such as threaded connection, plug-in connection, riveting, or snap-fit, thereby facilitating the installation and removal of the clamping and fixing assembly 2 from the mounting bracket 1. In other words, when the specifications of the main cylinder 10 change, different sizes of clamping and fixing assemblies 2 can be used to adapt to different specifications of the main cylinder 10. The clamping and fixing assembly 2 includes at least two clamping elements 212, which can be any structure such as a block structure, a plate structure, or a clamp-shaped structure; this embodiment does not limit this. The number of clamping members 212 can be any number, such as two, four, or six. At least two clamping members 212 are in relative positions, that is, at least two clamping members 212 are arranged relative to each other in a direction perpendicular to the axis of the main cylinder 10, so that there is at least one clamping member 212 on each side of the main cylinder 10 perpendicular to the axis for clamping and fixing the main cylinder 10.

[0036] The detection member included in the sealing detection assembly 3 may be at least one of sensors such as a pressure transmitter, a differential pressure sensor, and a vacuum sensor, which is not limited in the embodiments of the present application. For example, taking the detection member as a vacuum sensor as an example, after the master cylinder 10 is in the fixed position by the clamping and fixing assembly 2, it can be controlled by at least one control component such as a main control unit, for example, a programmable logic controller, a control chip, a microcontroller, etc. The main control unit controls the driving member 32 to push the sealing member 31 to be sealingly connected to the through hole. A detection device such as a pressure sensor or a position sensor may be provided to detect whether the sealing member 31 is sealingly connected to the through hole. After confirming that the sealing member 31 is sealingly connected to the through hole, the sealing cavity of the master cylinder 10 can be evacuated by opening the vacuum valve and using the vacuum generator to evacuate, and at the same time, the vacuum sensor detects the pressure change in the inner cavity of the master cylinder 10 and feeds the pressure signal back to the main control unit. The internal program compares the real-time pressure value with the preset detection value and the pressure holding time. The entire evacuation process continues until the pressure in the inner cavity of the master cylinder 10 reaches the preset vacuum degree requirement. After reaching the target vacuum degree, the vacuum valve is closed, and the system enters the pressure holding stage. Within the set pressure holding time, the main control unit will continuously monitor the pressure rise, that is, the leakage rate. If the actual pressure is always lower than the allowable leakage value during the entire pressure holding period, the main control unit judges that the product is qualified; conversely, if the pressure rises too fast, it is immediately judged as unqualified. Finally, the main control unit will transmit the signal to the manufacturing execution system and output a detection result signal, which can be displayed by a display assembly, such as a three-color light display (green light for qualified, red light for unqualified). If qualified, the master cylinder 10 proceeds to the next station. If unqualified, an alarm is triggered and the master cylinder flows into the unqualified station, completing one cycle.

[0037] It should be noted that the driving member 32 may be a cylinder piston pusher, a motor push rod structure, a motor lead screw structure, or a synchronous transmission structure, which is not limited in the embodiments of the present application. The sealing member 31 may be a sealing structure combining multiple structures such as a rod-shaped structure, a block-shaped structure, and a spherical structure. The shape of the portion of the sealing member 31 that contacts the through hole is determined according to the shape of the through hole, which is not limited in the embodiments of the present application.

[0038] Regarding the specific structure of the clamping and fixing assembly 2, in some embodiments, the clamping and fixing assembly 2 includes a follow-up fixture 21 and a positioning tool 22. The follow-up fixture 21 includes a support base 211 and at least two clamping members 212. The positioning tool 22 includes a positioning pallet 221, at least two positioning portions are provided on the positioning pallet 221, and the support base 211 is fixed on the positioning pallet 221 through the positioning portions.

[0039] In this embodiment, since the positioning fixture 22 includes a positioning tray 221 with at least two positioning parts, and the support seat 211 is fixed to the positioning tray 221 through the positioning parts, the support seat 211 can be stably fixed to the positioning tray 221 through the at least two positioning parts, so that there are at least two positioning points between the support seat 211 and the positioning tray 221. This further ensures the stability of the position of the at least two clamping members 212 provided on the support seat 211, which is beneficial to ensuring the stability of the clamping and fixing assembly 2 in fixing the main cylinder 10. It should be noted that the support seat 211 and the positioning tray 221 can be circular plate-shaped structures, square plate-shaped structures, or other shaped plate-shaped structures, and the positioning parts can be any structure with a limiting function such as protrusion structure, snap-fit ​​structure, and groove structure. This embodiment does not limit this.

[0040] Regarding the structure of the positioning part, in some embodiments, at least two positioning parts include a central positioning part 222 and an auxiliary positioning part 223. The central positioning part 222 is disposed in the middle of the positioning tray 221, and the auxiliary positioning part 223 is disposed at the edge of the positioning tray 221 and is located on the periphery of the central positioning part 222. The support base 211 is mounted on the positioning tray 221 through the central positioning part 222 and the auxiliary positioning part 223.

[0041] In this embodiment, since the central positioning part 222 is located in the middle of the positioning tray 221, and the auxiliary positioning part 223 is located at the edge of the positioning tray 221 and around the central positioning part 222, at least two positioning parts are distributed at different positions on the positioning tray 221, resulting in the positioning points between the support base 211 and the positioning tray 221 being distributed at two positions. When connecting the support base 211 and the positioning tray 221, the central positioning part 222 can be used to align the support base 211 and the positioning tray 221, and then the auxiliary positioning part 223 can be used to maintain the stability of the support base 211 and the positioning tray 221.

[0042] In some embodiments, the support base 211 has a positioning through hole 2111 in the middle, the central positioning part 222 protrudes from the surface of the positioning plate 221 facing the accompanying clamp 21, and the central positioning part 222 is inserted into the positioning through hole 2111.

[0043] In this embodiment, since the support base 211 has a positioning through hole 2111 in the middle and the central positioning part 222 protrudes from the surface of the positioning plate 221 facing the accompanying clamp 21, and the central positioning part 222 is inserted into the positioning through hole 2111, when the support base 211 and the positioning plate 221 are fixed, they can be positioned by the central positioning part 222 and the positioning through hole 2111. This not only facilitates the alignment of the support base 211 and the positioning plate 221, but also facilitates the positioning and installation between the support base 211 and the positioning plate 221.

[0044] In some embodiments, the positioning fixture 22 further includes an auxiliary fixture 224, which is installed on the end of the central positioning part 222 away from the positioning support plate 221, and the end of the auxiliary fixture 224 away from the positioning support plate 221 abuts against the end of the master cylinder 10.

[0045] In this embodiment, since the auxiliary tooling 224 is installed on the end of the central positioning part 222 away from the positioning support plate 221, and the end of the auxiliary tooling 224 away from the positioning support plate 221 abuts against the end of the main cylinder 10, the auxiliary tooling 224 can further support the main cylinder 10, thereby forming a situation where the auxiliary tooling 224 and at least two clamping members 212 jointly clamp the main cylinder 10, further ensuring the stability of the installation position of the main cylinder 10. It should be noted that the auxiliary tooling 224 can be any structure with a supporting surface, such as a rod-shaped structure, a column-shaped structure, or a frame-shaped structure, and this embodiment does not limit this. The auxiliary tooling 224 and the central positioning part 222 can be detachably connected by any method such as plug-in, sleeve, or threaded connection, thereby facilitating the assembly and disassembly of the auxiliary tooling 224 and the central positioning part 222.

[0046] In some embodiments, the end of the auxiliary tooling 224 away from the positioning tray 221 is a buffer ball head 2241.

[0047] In this embodiment, since the end of the auxiliary tooling 224 furthest from the positioning plate 221 is a buffer ball head 2241, the contact force between the main cylinder 10 and the auxiliary tooling 224 can be reduced through the buffer ball head 2241. This allows for a certain degree of buffering when the main cylinder 10 and the auxiliary tooling 224 come into contact, preventing hard contact between the main cylinder 10 and the auxiliary tooling 224 from damaging the structure of the main cylinder 10. It should be noted that the buffer ball head 2241 can be any deformable structure such as a rubber ball head, an elastic alloy ball head, a polyurethane ball head, or a plastic elastomer ball head. This embodiment of the application does not limit this.

[0048] Regarding the structure of the auxiliary positioning part 223, in some embodiments, the auxiliary positioning part 223 includes a first protrusion 2231 and a second protrusion 2232. The first protrusion 2231 is disposed on the surface of the positioning tray 221 facing the accompanying clamp 21. The second protrusion 2232 and the second protrusion 2232 are stacked. The first protrusion 2231 is located between the second protrusion 2232 and the positioning tray 221. The first protrusion 2231, the second protrusion 2232 and the positioning tray 221 form a positioning groove, and the edge of the support seat 211 is engaged in the positioning groove.

[0049] In this embodiment, since the second protrusion 2232 and the second protrusion 2232 are stacked, the first protrusion 2231 is located between the second protrusion 2232 and the positioning plate 221. The first protrusion 2231, the second protrusion 2232 and the positioning plate 221 form a positioning groove. The edge of the support seat 211 is engaged in the positioning groove. Therefore, the positioning groove formed by the first protrusion 2231, the second protrusion 2232 and the positioning plate 221 can limit the support seat 211, prevent the support seat 211 from shifting after being connected with the positioning plate 221, and facilitate the assembly of the support seat 211 with the positioning plate 221. It should be noted that the first protrusion 2231 and the second protrusion 2232 can be connected into a whole by welding, plugging, snapping, etc., so that the first protrusion 2231 and the second protrusion 2232 are bent together, thereby allowing a certain gap between the first protrusion 2231, the second protrusion 2232 and the positioning plate 221, which can form a positioning groove. It should also be noted that multiple auxiliary positioning parts can be provided on the positioning plate 221. The structure of the multiple auxiliary positioning parts is the same as that of the first protrusion and the second protrusion in the above embodiment, and will not be described again in this embodiment.

[0050] In some embodiments, the auxiliary positioning part further includes a locking screw 2233, which is sequentially threaded onto the second protrusion 2232, the second protrusion 2232 and the positioning plate 221.

[0051] In this embodiment, since the auxiliary positioning part also includes a locking screw 2233, which is sequentially threaded onto the second protrusion 2232, the second protrusion 2232 and the positioning plate 221, after the edge of the support 211 is engaged with the positioning groove formed by the first protrusion 2231, the second protrusion 2232 and the positioning plate 221, the gap between the second protrusion 2232 and the support 211 can be further reduced by tightening the locking screw 2233, thereby further ensuring the stability of the installation position of the support 211.

[0052] In some embodiments, a first support member 225 and a second support member 226 are further provided on the surface of the positioning plate 221 facing the support base 211, and the first support member 225 and the second support member 226 are used to fix the piston included in the master cylinder 10.

[0053] In this embodiment, the piston included in the master cylinder 10 can be fixed by a first support member 225 and a second support member 226 disposed on the surface of the positioning plate 221 facing the support base 211, thereby facilitating the measurement and inspection of the piston. It should be noted that the first support member 225 and the second support member 226 can be columnar structures to adapt to the piston structure and facilitate assembly with the piston. It should also be noted that the measurement and inspection of the piston can include the measurement of the piston profile and the measurement of the piston pin hole. The piston profile is measured by using a roundness meter to measure the actual contour change of the piston's cylindrical surface at different corner positions, thereby quantitatively evaluating parameters such as the piston's cylindricity, roundness, and straightness. The piston pin hole is measured by using a roundness meter to measure the piston's diameter.

[0054] In addition, the first support member 225 and the second support member 226 should be located at the edge of the positioning tray 221 to avoid interference between the positioning tray 221 and the support base 211.

[0055] In some embodiments, the detection device further includes a lifting assembly 4, which is mounted on the mounting frame 1 and located at the bottom of the positioning tray 221. The lifting assembly 4 includes a lifting member 41 and a connecting plate 42. The connecting plate 42 is connected to the end of the lifting member 41 facing the positioning tray 221. The lifting member 41 moves in a direction close to or away from the positioning tray 221. When the lifting member 41 moves in a direction close to the positioning tray 221, the connecting plate 42 and the positioning tray 221 are connected. When the lifting member 41 moves in a direction away from the positioning tray 221, the connecting plate 42 and the positioning tray 221 are separated.

[0056] In this embodiment, when it is necessary to fix the main cylinder 10, the lifting member 41 can move in the direction close to the positioning tray 221, so that the connecting plate 42 and the positioning tray 221 are connected. Finally, the lifting member 41 pushes the positioning tray 221 so that the clamping and fixing assembly 2 can further clamp and fix the main cylinder 10, thereby eliminating the need for manual fixing of the main cylinder 10 and making the entire fixing process of the main cylinder 10 more time-saving and labor-saving. In addition, it should be noted that a snap-fit ​​structure or a riveting structure can be provided between the connecting plate 42 and the positioning tray 221, so that the connecting plate 42 and the positioning tray 221 can form a whole after being connected, and it is also convenient for the connecting plate 42 and the positioning tray 221 to separate when the lifting member 41 moves away from the positioning tray 221. For example, a snap-fit ​​protrusion can be provided on the surface of the connecting plate 42 facing the positioning tray 221, and a snap-fit ​​groove can be provided on the surface of the positioning tray 221 facing the connecting plate 42. When the lifting member 41 moves toward the positioning tray 221, the snap-fit ​​protrusion and the snap-fit ​​groove snap together, thereby connecting the connecting plate 42 and the positioning tray 221. When the lifting member 41 moves away from the positioning tray 221, the snap-fit ​​protrusion and the snap-fit ​​groove separate, thereby finally separating the connecting plate 42 and the positioning tray 221.

[0057] Furthermore, the lifting member 41 in this application embodiment can be any structure that can be linearly driven, such as a hydraulic push mechanism, a motor push rod mechanism, or an electric lifting structure. This application embodiment does not limit this type of structure.

[0058] Regarding the structure of the lifting member 41, in some embodiments, the lifting member 41 includes a first cylinder 411 and a push rod, one end of the push rod is connected to the piston rod of the first cylinder 411, and the other end of the push rod is fixed to the connecting plate 42.

[0059] In this embodiment, since one end of the push rod is connected to the piston rod of the first cylinder 411, and the other end of the push rod is fixed to the connecting plate 42, the linear movement of the push rod can be achieved by the extension and retraction of the piston rod of the first cylinder 411. This, in turn, drives the connecting plate 42 away from or towards the positioning support plate 221, automating the entire process and making it more time-saving and labor-saving. Furthermore, because cylinder drives offer advantages such as simple structure and low cost, high speed and rapid response, easy maintenance, reliable operation, and long service life, the entire lifting process is more stable and reliable, ensuring the long-term stable operation of the entire detection device.

[0060] The push rod structure includes a first rod 412, a second rod 413, and a third rod 414. One end of the first rod 412 is connected to the piston rod of the first cylinder 411, and the other end of the first rod 412 is fixed to the connecting plate 42. The second rod 413 and the third rod 414 are respectively movably connected to both sides of the axis of the first rod 412. The ends of the second rod 413 and the third rod 414 facing the positioning plate 221 are both fixed to the connecting plate 42. The ends of the second rod 413 and the third rod 414 away from the positioning plate 221 are both free ends.

[0061] In this embodiment, since one end of the first rod 412 is connected to the piston rod of the first cylinder 411, and the other end of the first rod 412 is fixed to the connecting plate 42, the linear movement of the first rod 412 can be achieved by the extension and retraction of the piston rod of the first cylinder 411, thereby causing the connecting plate 42 to move away from or towards the positioning support plate 221. Furthermore, since the second rod 413 and the third rod 414 are respectively movably connected to both sides of the axis of the first rod 412, the ends of the second rod 413 and the third rod 414 facing the positioning support plate 221 are fixed to the connecting plate 42, while the ends of the second rod 413 and the third rod 414 away from the positioning support plate 221 are free ends. Therefore, during the process of the first rod 412 causing the connecting plate 42 to move away from or towards the positioning support plate 221... In this way, the second rod 413 and the third rod 414 also move linearly in the same direction as the first rod 412, so that the connecting plate 42 is simultaneously subjected to the forces of the first rod 412, the second rod 413 and the third rod 414 as it moves away from or towards the positioning support plate 221. This prevents the connecting plate 42 from deviating laterally as it moves away from or towards the positioning support plate 221, ensuring that the connecting plate 42 can be stably connected to or separated from the positioning support plate 221, and ensuring the continuity and stability of the entire process.

[0062] In some embodiments, the lifting assembly 4 further includes a mounting plate 43, a first cylinder 411 is mounted on the mounting plate 43, a first linear bearing 44 and a second linear bearing 45 are respectively mounted on the mounting plate 43, the end of the second rod 413 away from the positioning support plate 221 passes through the first linear bearing 44, and the end of the third rod 414 away from the positioning support plate 221 passes through the second linear bearing 45.

[0063] In this embodiment, since the first cylinder 411 is mounted on the mounting plate 43, and the mounting plate 43 is respectively equipped with a first linear bearing 44 and a second linear bearing 45, the end of the second rod 413 away from the positioning support plate 221 passes through the first linear bearing 44, and the end of the third rod 414 away from the positioning support plate 221 passes through the second linear bearing 45. Therefore, the second rod 413 and the third rod 414 can be guided to move by the first linear bearing 44, avoiding the offset of the second rod 413 and the third rod 414 during movement, ensuring that the force exerted by the second rod 413 and the third rod 414 on the connecting plate 42 is always perpendicular to the plane where the connecting plate 42 is located, and ensuring the smoothness of the entire movement.

[0064] It should be noted that the mounting plate 43 can be a single plate structure or a frame structure composed of multiple plate structures. The first cylinder 411 can be mounted on the surface of the mounting plate 43 away from the connecting plate 42. The piston rod of the first cylinder 411 can extend through the connecting plate 42 in the direction of connection. The first linear bearing 44 and the second linear bearing 45 should be mounted on different sides of the first cylinder 411, so that the installation of the first cylinder 411, the first linear bearing 44 and the second linear bearing 45 does not interfere with each other.

[0065] In some embodiments, the end of the second rod 413 facing the positioning plate 221 and the end of the third rod 414 facing the positioning plate 221 are respectively fixed to the two ends of the connecting plate 42 in the length direction away from the surface of the positioning plate 221.

[0066] In this embodiment, since the ends of the second rod 413 and the third rod 414 facing the positioning plate 221 are respectively fixed to the two ends of the connecting plate 42 away from the surface of the positioning plate 221 along the length direction, and since the second rod 413 and the third rod 414 are respectively movably connected to both sides of the axis of the first rod 412, the second rod 413 and the third rod 414 exert force on the connecting plate 42 on both sides of the axis of the first rod 412. This ensures that the force exerted by the third rod 414 and the second rod 413 on the connecting plate 42 is always at two different levels than the force exerted by the first rod 412 on the connecting plate 42. This keeps the thrust of the entire push rod on the connecting plate 42 in dynamic balance, further preventing the connecting plate 42 from deflecting due to unilateral force.

[0067] In some embodiments, the accompanying clamp 21 further includes an elastic element 213 and a support rod 214. One end of the elastic element 213 is connected to the clamping member 212, and the other end of the elastic element 213 is connected to the support rod 214. The end of the support rod 214 away from the clamping member 212 is fixed on the support base 211, and the elastic element 213 is in an elastically compressed state.

[0068] In this embodiment, the accompanying clamp 21 also includes an elastic element 213 and a support rod 214. One end of the elastic element 213 is connected to the clamping member 212, and the other end of the elastic element 213 is connected to the support rod 214. The end of the support rod 214 away from the clamping member 212 is fixed to the support base 211. The elastic element 213 is in an elastically compressed state. Therefore, the elastic element 213 can provide a certain amount of compression deformation to the lifting process of the lifting mechanism, thereby providing a certain buffer for the lifting process and avoiding damage to the structure of the main cylinder 10 due to excessive force during the lifting process. It should be noted that the elastic element 213 can be a compression spring, rubber strip, rubber spring, or other elastic element that can recover its initial deformation. The support member can be any structure such as a support rod, support column, or support beam. This embodiment does not limit this.

[0069] In some embodiments, the clamping member 212 includes a first clamping block 2121 and a second clamping block 2122 connected together. The first clamping block 2121 is connected to the elastic member 213, and the end face of the second clamping block 2122 facing the main cylinder 10 is an arc surface.

[0070] In this embodiment, since the first clamping block 2121 is connected to the elastic member 213, and the end face of the second clamping block 2122 facing the main cylinder 10 is an arc surface, the first clamping block 2121 and the elastic member 213 can be connected, and the end face of the second clamping block 2122 facing the main rod can be fitted with the main cylinder 10. Furthermore, the arc surface of the end face of the second clamping block facing the main cylinder 10 increases the contact area between the clamping member and the main cylinder 10. This not only helps to ensure the stability and firmness of the connection between the clamping member 212 and the main cylinder 10, but also avoids damage to the cylinder body of the main cylinder 10 when the clamping member 212 is connected to the main cylinder 10.

[0071] It should be noted that the arc of the end face of the second clamping block 2122 facing the main cylinder 10 can be consistent with the surface arc of the main cylinder 10. The first clamping block 2121 and the second clamping block 2122 can be connected by snap-fit, screw connection, riveting, shaft connection, etc., so that the first clamping block 2121 and the second clamping block 2122 form a bent structure, which makes it easy to connect the second clamping block 2122 to the main cylinder 10, and also facilitates the connection between the first clamping block 2121 and the elastic element 213.

[0072] In some embodiments, the sealing detection assembly 3 further includes a connecting frame 33, the driving component 32 is a second cylinder, the connecting frame 33 is mounted on the mounting frame 1, the second cylinder is mounted on the connecting frame 33, and the piston rod of the second cylinder is connected to the seal 31.

[0073] In this embodiment, since the connecting bracket is mounted on the mounting frame 1 and the second cylinder is mounted on the connecting frame 33, and the piston rod of the second cylinder is connected to the seal 31, the extension and retraction of the piston rod of the second cylinder can drive the seal 31 to move towards and away from the main rod, thereby automating the process of sealing the inner cavity of the main cylinder 10. Furthermore, since cylinder drive has advantages such as simple structure and low cost, high speed and fast response, easy maintenance, reliable operation and long service life, the process of driving the seal 31 with the second cylinder is more stable and reliable, which is beneficial to ensuring the long-term stable operation of the entire sealing detection assembly 3.

[0074] In some embodiments, the detection device further includes a linear transmission member 5, which moves along an axis perpendicular to the main cylinder 10, and the clamping and fixing assembly 2 is connected to the linear transmission member 5.

[0075] In this embodiment, since the linear transmission component 5 moves along an axis perpendicular to the main cylinder 10, and the clamping and fixing assembly 2 is connected to the linear transmission component 5, the movement of the linear transmission component 5 can drive the clamping and fixing assembly 2 to move, thereby driving the main cylinder 10 to the lifting assembly. This facilitates the connection and coordination between the entire detection device, making the movement and coordination of the entire detection assembly more time-saving and labor-saving. It should be noted that the linear transmission component 5 can be a linear transmission structure such as a slide rail structure, a conveyor belt structure, or a coaxial chain structure; this embodiment does not limit this type of linear transmission structure.

[0076] The complete detection process of the detection device provided in this application embodiment is described below: When performing air tightness testing on the master cylinder 10, the master cylinder 10 may first be fixed between at least two clamping members 212, then the support base 211 and the positioning pallet 221 are fixed, so that the clamping and fixing assembly 2 forms an integral body. Thereafter, the movement of the linear transmission member 5 drives the clamping and fixing assembly 2 to move, and further the clamping and fixing assembly 2 can be driven to move to the jacking assembly 4. Thereafter, the alignment of the clamping and fixing assembly 2 and the jacking assembly 4 may be detected by devices such as a position sensor, a photoelectric signal sensor, etc., and then the signal is transmitted to the main control unit. The main control unit controls the first air cylinder 411, and the linear movement of the push rod is realized by the extension and retraction of the piston rod of the first air cylinder 411, and further the push rod drives the connection plate 42 away from the positioning pallet 221, and finally pushes the positioning pallet 221, so that the elastic member 213 is further compressed and deformed, to provide a continuous and flexible pressing force to the clamping members 212. In this process, the elastic sphere of the auxiliary tooling 224 abuts against the bottom of the master cylinder 10, ensuring that its force center stably abuts the master cylinder 10 against the upper circular tooling, which facilitates the air tightness testing in the subsequent process. The control may be performed by at least one control component of the main control unit, such as a programmable logic controller, a control chip, a microcontroller, etc. The main control unit controls the driving member 32 to push the sealing member 31 to be sealingly connected to the through hole. A detection device may be provided, such as a pressure sensor or a position sensor, to detect whether the sealing member 31 is sealingly connected to the through hole. After it is confirmed that the sealing member 31 is sealingly connected to the through hole, a vacuuming manner may be adopted: by opening the vacuum valve, the vacuum generator vacuumizes the sealed cavity of the master cylinder 10, and at the same time, the vacuum sensor detects the pressure change in the inner cavity of the master cylinder 10, and feeds the pressure signal back to the main control unit. The internal program compares the real-time pressure value with the preset detection value and pressure holding time. The entire vacuuming process will continue until the pressure in the inner cavity of the master cylinder 10 reaches the preset vacuum degree requirement. After the target vacuum degree is reached, the vacuum valve is closed, and the system enters the pressure holding stage. Within the set pressure holding time, the main control unit will continuously monitor the pressure rise situation, that is, the leakage rate. If the actual pressure is always lower than the allowable leakage value during the entire pressure holding period, the main control unit judges that the product is qualified; conversely, if the pressure rises too fast, it is immediately judged as unqualified. Finally, the main control unit will transmit the signal to the manufacturing execution system, and output a detection result signal, which may be displayed by a display assembly, such as a three-color light display (green light for qualified, red light for unqualified). If qualified, the master cylinder 10 proceeds to the next station; if unqualified, an alarm is triggered and the master cylinder flows into the unqualified station, completing one cycle.

[0077] As can be seen from the above embodiments, in this application embodiment, since the clamping and fixing assembly 2 is detachably connected to the mounting frame 1, the clamping and fixing assembly 2 includes at least two clamping members 212 arranged opposite to each other. The at least two clamping members 212 are used to clamp the main cylinder 10. Therefore, not only can the main cylinder 10 be clamped by at least two clamping members 212, so that the position of the main cylinder 10 is kept fixed, which is convenient for subsequent air tightness testing of the main cylinder 10, but when the specifications of the main cylinder 10 change, it is only necessary to remove the clamping and fixing assembly 2 from the mounting frame 1 and replace it with a clamping and fixing assembly 2 that is compatible with the main cylinder 10, so as to complete the adaptation with the main cylinder 10 of different specifications, which is convenient for fixing the main cylinder 10 of different specifications. Since the sealing detection assembly 3 is mounted on the mounting bracket 1, and each sealing detection assembly 3 is located on one side of the through hole axis, the sealing detection assembly 3 includes a sealing element 31, a detection element, and a driving element 32. The sealing element 31 and the driving element 32 are driven together. The driving element 32 drives the sealing element 31 to seal and connect in the through hole, or drives the sealing element 31 away from the through hole. The detection element is located on the top side of the main cylinder 10 and is used to detect the airtightness of the main cylinder 10. Therefore, after the position of the main cylinder 10 is fixed, the driving element 32 can drive the sealing element 31 to seal and connect in each through hole of the main cylinder 10, so that the inner cavity of the main cylinder 10 forms a sealed space, which facilitates the subsequent detection of the airtightness of the main cylinder 10 by the detection element. After the detection element completes the airtightness test of the main cylinder 10, the driving element 32 can drive the sealing element 31 away from the through hole to prepare for the airtightness test of the next main cylinder 10. Thus, when testing the airtightness of the main cylinder 10 using the testing device provided in this embodiment, not only can main cylinders 10 of different specifications be fixed, facilitating the testing device's adaptation to different specifications and improving its adaptability, but also, during the entire testing process, the sealing and testing component 3 can automatically complete the sealing and testing of the inner cavity of the main cylinder 10, making the entire testing process more efficient. Furthermore, since the main cylinder 10 is always fixed by the clamping and fixing component 2 throughout the testing process, there will be no loss of airtightness testing accuracy due to movement of the main cylinder 10, further improving the testing accuracy of the device. In summary, testing the airtightness of the main cylinder 10 using the testing device provided in this embodiment not only adapts to main cylinders 10 of different specifications but also improves testing efficiency and accuracy.

[0078] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0079] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0080] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A detection device for detecting the airtightness of a master cylinder, the master cylinder comprising four through holes communicating with the inner cavity, characterized in that, The detection device includes: Mounting rack; A clamping and fixing assembly is detachably connected to the mounting bracket. The clamping and fixing assembly includes at least two opposing clamping members, which are used to clamp the master cylinder. A sealing detection assembly is mounted on the mounting bracket, and each sealing detection assembly is located on one side of the through hole axis. The sealing detection assembly includes a seal, a detection element, and a driving element. The seal and the driving element are driven to connect. The driving element drives the seal to seal in the through hole or drives the seal away from the through hole. The detection element is disposed on the top side of the master cylinder and is used to detect the airtightness of the master cylinder.

2. The detection device according to claim 1, characterized in that, The clamping and fixing assembly includes a traveling clamp and a positioning fixture. The traveling clamp includes a support base and at least two clamping elements. The positioning fixture includes a positioning tray with at least two positioning parts. The support base is fixed to the positioning tray through the positioning parts.

3. The detection device according to claim 2, characterized in that, At least two of the positioning parts include a central positioning part and an auxiliary positioning part. The central positioning part is disposed in the middle of the positioning tray, and the auxiliary positioning part is disposed at the edge of the positioning tray and is located around the central positioning part. The support base is mounted on the positioning tray through the central positioning part and the auxiliary positioning part.

4. The detection device according to claim 3, characterized in that, The support base has a positioning through hole in the middle, and the central positioning part protrudes from the surface of the positioning plate facing the accompanying clamp. The central positioning part is inserted into the positioning through hole.

5. The detection device according to claim 4, characterized in that, The positioning fixture also includes an auxiliary fixture, which is installed on the end of the central positioning part away from the positioning support plate, and the end of the auxiliary fixture away from the positioning support plate abuts against the end of the master cylinder.

6. The detection device according to claim 5, characterized in that, The end of the auxiliary tooling furthest from the positioning tray is a buffer ball head.

7. The detection device according to claim 3, characterized in that, The auxiliary positioning part includes a first protrusion and a second protrusion; The first protrusion is disposed on the surface of the positioning tray facing the accompanying fixture. The second protrusion and the second protrusion are stacked. The first protrusion is located between the second protrusion and the positioning tray. The first protrusion, the second protrusion and the positioning tray form a positioning groove. The edge of the support seat is engaged in the positioning groove.

8. The detection device according to claim 7, characterized in that, The auxiliary positioning part also includes a locking screw; The locking screw is sequentially threaded onto the second protrusion, the second protrusion, and the positioning plate.

9. The detection device according to claim 2, characterized in that, The positioning plate is further provided with a first support member and a second support member on the surface facing the support base. The first support member and the second support member are used to fix the piston included in the master cylinder.

10. The detection device according to claim 2, characterized in that, The detection device also includes a lifting assembly; The lifting assembly is mounted on the mounting bracket and located at the bottom of the positioning tray. The lifting assembly includes a lifting member and a connecting plate. The connecting plate is connected to the end of the lifting member facing the positioning tray. The lifting member moves in a direction close to or away from the positioning tray. When the lifting member moves in a direction close to the positioning tray, the connecting plate and the positioning tray are connected. When the lifting member moves in a direction away from the positioning tray, the connecting plate and the positioning tray are separated.

11. The detection device according to claim 10, characterized in that, The lifting component includes a first cylinder and a push rod. One end of the push rod is connected to the piston rod of the first cylinder, and the other end of the push rod is fixed to the connecting plate.

12. The detection device according to claim 11, characterized in that, The push rod includes a first rod, a second rod, and a third rod. One end of the first rod is connected to the piston rod of the first cylinder, and the other end of the first rod is fixed to the connecting plate. The second rod and the third rod are movably connected to both sides of the axis of the first rod. The ends of the second rod facing the positioning plate and the ends of the third rod facing the positioning plate are both fixed to the connecting plate. The ends of the second rod away from the positioning plate and the ends of the third rod away from the positioning plate are both free ends.

13. The detection device according to claim 12, characterized in that, The lifting assembly also includes a mounting plate, on which the first cylinder is mounted. A first linear bearing and a second linear bearing are respectively mounted on the mounting plate. The end of the second rod away from the positioning plate passes through the first linear bearing, and the end of the third rod away from the positioning plate passes through the second linear bearing.

14. The detection device according to claim 12, characterized in that, The end of the second rod facing the positioning plate and the end of the third rod facing the positioning plate are respectively fixed to the two ends of the connecting plate in the length direction away from the positioning plate.

15. The detection device according to claim 10, characterized in that, The accompanying clamp also includes an elastic element and a support rod; One end of the elastic element is connected to the clamping element, and the other end of the elastic element is connected to the support rod. The end of the support rod away from the clamping element is fixed on the support base, and the elastic element is in an elastically compressed state.

16. The detection device according to claim 15, characterized in that, The clamping component includes a first clamping block and a second clamping block connected together. The first clamping block is connected to the elastic element, and the end face of the second clamping block facing the main cylinder is an arc surface.

17. The detection device according to claim 1, characterized in that, The sealing detection assembly also includes a connecting frame, and the driving component is a second cylinder; The connecting bracket is mounted on the mounting bracket, the second cylinder is mounted on the connecting bracket, and the piston rod of the second cylinder is connected to the seal.

18. The detection device according to claim 1, characterized in that, The detection device further includes a linear transmission component that moves along an axis perpendicular to the main cylinder, and the clamping and fixing assembly is connected to the linear transmission component.

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