A sealing performance detection device of a laser radar mounting cover

Abstract

The application relates to a sealing performance detection equipment of a laser radar mounting cover, and belongs to the field of sealing performance detection equipment. The equipment comprises a rack, a detection clamp mounted on the top surface of the rack and a pumping detection mechanism for detecting the sealing performance of the mounting cover. The detection clamp comprises a supporting base mounted on the top surface of the rack, a fixing mechanism mounted on the top surface of the rack and matched with the supporting base, a plugging block for plugging a detection opening and a plugging assembly for driving the plugging block to act. The supporting base is provided with a layout groove for arranging the mounting cover, and the supporting base is circumferentially provided with a sealing protruding block abutting against the bottom surface of the mounting cover at the layout groove. The outer side wall of the sealing protruding block is sealingly matched with a mounting protruding ring of a sealing strip. The plugging block is provided with a sealing ring matched with the detection opening. The supporting base is further provided with a pumping channel penetrating through the upper and lower side surfaces of the supporting base and being communicated with the pumping detection mechanism. The application has the effect of quickly detecting the sealing performance of the mounting cover.

Description

Technical Field

[0001] This application relates to the field of sealing performance testing equipment, and in particular to a sealing performance testing equipment for a lidar mounting cover. Background Technology

[0002] To ensure stable mounting of the lidar on the car roof, a mounting cover is often installed on the roof. (See reference...) Figure 1 and Figure 2 The mounting cover 1 has a protrusion 11 for accommodating a lidar sensor and extensions 12 connecting both sides of the protrusion 11. The mounting cover 1 also has a detection opening 13 at the protrusion 11 for lidar detection. The mounting cover 1 mainly includes an exterior trim panel 14 and a mounting plate 15. The mounting cover 1 has a first mounting assembly 151 and a second mounting assembly 152 at the mounting plate 15 for connection and fixation to the vehicle roof. The first mounting assembly 151 has a mounting protrusion 1511 extending in a direction away from the exterior trim panel 14. To improve the sealing performance of the mounting cover 1, a sealing strip 16 is provided at the seam between the exterior trim panel 14 and the mounting plate 15. The side of the sealing strip 16 facing away from the exterior trim panel 14 has a mounting protrusion 161.

[0003] Regarding the aforementioned technologies, the inventors believe there is a need for a testing device suitable for testing the sealing performance of the aforementioned mounting cover. Utility Model Content

[0004] To quickly test the sealing performance of a mounting cover, this application provides a device for testing the sealing performance of a lidar mounting cover.

[0005] The sealing performance testing device for a lidar mounting cover provided in this application adopts the following technical solution:

[0006] A sealing performance testing device for a lidar mounting cover includes a frame, a testing fixture mounted on the top surface of the frame, and an air extraction testing mechanism for testing the sealing performance of the mounting cover. The testing fixture includes a support base mounted on the top surface of the frame, a fixing mechanism mounted on the top surface of the frame and cooperating with the support base, a sealing block for sealing the detection opening, and a sealing assembly for driving the sealing block. The support base has an arrangement slot for arranging the mounting cover, and a sealing protrusion is circumferentially provided on the support base at the arrangement slot, abutting against the bottom surface of the mounting cover. The outer wall of the sealing protrusion is sealed and engaged with the mounting ring of the sealing strip. The support base also has an air extraction channel penetrating the upper and lower sides of the support base and communicating with the air extraction testing mechanism.

[0007] By adopting the above technical solution, in the process of testing the sealing performance of the lidar mounting cover, the mounting cover is first placed in the arrangement groove of the support base, so that the bottom surface of the mounting cover abuts against the sealing protrusion. At the same time, the mounting protrusion of the sealing strip seals against the outer wall of the sealing protrusion. Then, the mounting cover arranged on the support base is fixed by the fixing mechanism. Next, the sealing block is driven by the sealing component to seal the detection opening of the mounting cover. Finally, the air extraction detection mechanism extracts the air from the mounting cover and the arrangement cavity and detects the pressure drop value, thereby quickly and effectively judging the sealing performance of the mounting cover.

[0008] Optionally, the fixing mechanism includes multiple fixing blocks for pressing the mounting cover against the support base and a drive assembly for driving the fixing blocks to move; the drive assembly includes a drive cylinder mounted on the top surface of the frame and a transmission linkage group that drives the drive cylinder and the fixing blocks.

[0009] By adopting the above technical solution, the specific structure of the fixing mechanism is disclosed. When fixing the mounting cover arranged on the support base, the piston rod of the driving cylinder drives the fixing block to press against the top surface of the mounting cover under the trend of the transmission linkage group during the upward process. This helps to ensure the stable placement of the mounting cover on the support base and improves the detection accuracy of the sealing performance test of the mounting cover.

[0010] Optionally, the fixing block has an abutting surface that abuts against the top surface of the mounting cover, and the fixing block is provided with rubber pads spaced apart along the length direction of the fixing block at the abutting surface.

[0011] By adopting the above technical solution, the setting of the rubber pad at the contact surface of the fixing block helps to improve the stable fit between the fixing block and the top surface of the mounting cover, while reducing the damage of the fixing block to the surface of the mounting cover.

[0012] Optionally, the top surface of the frame is provided with a support base, and the sealing assembly includes a guide rod arranged parallel to the extension direction of the detection opening, a guide sleeve installed on the support base and cooperating with the guide rod, and a sealing cylinder installed on the top surface of the support base; the piston rod of the sealing cylinder is arranged parallel to the guide rod and extends towards the detection opening.

[0013] By adopting the above technical solution, the specific structure of the sealing component is disclosed. During the sealing process of the detection opening of the mounting cover, the sealing block is driven by the sealing cylinder to slide in the extension direction of the detection opening, so that the sealing block can seal the detection opening and reduce the probability of inaccurate detection data due to air leakage at the detection opening. The guide rod and guide sleeve help to improve the guidance of the sliding process of the sealing block, ensuring that the sealing block accurately seals the detection opening.

[0014] Optionally, the number of guide rods is two.

[0015] By adopting the above technical solution, the installation of two guide rods helps to improve the stable guidance during the guiding process of the sealing block.

[0016] Optionally, the support base has a limiting groove at the arrangement groove, and the limiting groove is provided with a first limiting member and a second limiting member for arranging the first mounting component. The first limiting member has a limiting circular groove for arranging the mounting protrusion, and the second limiting member has a limiting strip groove for arranging the mounting protrusion. The first limiting member and the second limiting member are fixed to the limiting groove by screws.

[0017] By adopting the above technical solution, the first and second limiting members in the limiting groove of the support base facilitate the positioning of the first mounting component on the mounting plate on the support base, reducing the probability of the mounting cover shifting on the support base. Simultaneously, the upper limiting groove on the second limiting member helps accommodate positional errors in the first mounting groove of the mounting cover during production. The first and second limiting members are fixed in the limiting groove with screws, facilitating maintenance and replacement of the first and second limiting members.

[0018] Optionally, the support base has a clearance groove at the arrangement groove for arranging the second mounting component.

[0019] By adopting the above technical solution, the setting of the relief groove in the support base helps to reduce the probability that the bottom surface of the mounting cover cannot abut against the sealing protrusion due to the presence of the second mounting component, thus ensuring the accuracy of the sealing performance test of the mounting cover.

[0020] Optionally, the support base may also have a laser marking window at the arrangement slot.

[0021] By adopting the above technical solution and setting the laser marking window on the support base, the mounting cover can be laser-marked while its sealing performance is being tested, effectively improving the production efficiency of the mounting cover.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. A sealing performance testing device for a lidar mounting cover, wherein during the sealing performance testing process, the mounting cover is first placed in the arrangement groove of the support base, and then the mounting cover is fixed to the support base by a fixing mechanism. The sealing block is driven by a sealing component to seal the detection opening of the mounting cover, so that the mounting cover and the support base are sealed together. Finally, the sealing performance of the mounting cover is tested by an air extraction testing mechanism, and the quality of the sealing performance of the mounting cover is quickly determined by the pressure drop value between the mounting cover and the support base.

[0024] 2. The rubber pads at the contact surfaces of the fixing blocks help improve the stable fit between the fixing blocks and the top surface of the mounting cover, while also reducing damage to the surface of the mounting cover caused by the fixing blocks.

[0025] 3. The first and second limiting components help to limit the movement of the mounting cover. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the lidar mounting cover.

[0027] Figure 2 This is a partially enlarged schematic diagram of the mounting plate and sealing strip.

[0028] Figure 3 This is a schematic diagram of the sealing performance testing device for the lidar mounting cover in this embodiment of the application.

[0029] Figure 4 This is a schematic diagram of the structure of the frame and the testing fixture in an embodiment of this application.

[0030] Figure 5 This is a top view of the support base in an embodiment of this application.

[0031] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0032] Figure 7 This is a schematic diagram of the fixing mechanism in the embodiments of this application.

[0033] Figure 8 This is a schematic diagram of the structure of the sealing block and the sealing component in an embodiment of this application.

[0034] Figure 9 This is a schematic diagram of the guide sleeve in an embodiment of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Mounting cover; 11. Protrusion; 12. Extension; 13. Detection opening; 14. Outer panel; 15. Mounting plate; 151. First mounting assembly; 1511. Mounting protrusion; 152. Second mounting assembly; 16. Sealing strip; 161. Mounting protrusion; 2. Frame; 21. Support base; 3. Detection fixture; 31. Support base; 311. Arrangement groove; 312. Sealing protrusion; 313. Limiting groove; 314. First limiting element; 3141. Limiting circular groove; 315. Second limiting element; 3 151. Limiting groove; 316. Clearance groove; 317. Air extraction channel; 318. Laser marking window; 32. Fixing mechanism; 321. Fixing block; 322. Drive assembly; 3221. Drive cylinder; 3222. Transmission linkage assembly; 32221. First linkage; 32222. Mounting block; 32223. Second linkage; 33. Sealing block; 331. Sealing ring; 34. Sealing assembly; 341. Guide rod; 342. Guide sleeve; 343. Sealing cylinder; 35. Rubber pad; 4. Air extraction detection mechanism. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0037] This application discloses a device for testing the sealing performance of a lidar mounting cover. (Refer to...) Figure 3 A sealing performance testing device for a lidar mounting cover includes a frame 2, a testing fixture 3 mounted on the top surface of the frame 2, and an air extraction testing mechanism 4 for testing the sealing performance of the mounting cover 1. The top surface of the frame 2 is a flat surface.

[0038] Reference Figure 4 The detection fixture 3 includes a support base 31 mounted on the top surface of the frame 2, a fixing mechanism 32 mounted on the top surface of the frame 2 and cooperating with the support base 31, a blocking block 33 for blocking the detection opening 13 of the mounting cover 1, and a blocking assembly 34 for driving the blocking block 33 to move. The cross-section of the support base 31 is similar to that of the mounting cover 1. The support base 31 has an arrangement groove 311 for arranging the mounting cover 1, and the support base 31 has a sealing protrusion 312 circumferentially arranged in the arrangement groove 311 for abutting against the bottom surface of the mounting cover 1. When the mounting cover 1 is placed in the arrangement groove 311 of the support base 31, the outer wall of the sealing protrusion 312 seals against the inner wall of the mounting ring 161 of the sealing strip 16.

[0039] Reference Figure 5 and Figure 6To reduce the probability of inaccurate test results due to the presence of the first mounting component 151 and the second mounting component 152 on the bottom surface of the mounting cover 1 failing to seal properly with the sealing ring during testing, the support base 31 has a limiting groove 313 at the arrangement groove 311, and the limiting groove 313 is provided with a first limiting member 314 and a second limiting member 315 for arranging the first mounting component 151. The first limiting member 314 is correspondingly arranged at the protrusion 11 of the mounting cover 1, and the second limiting member 315 is correspondingly arranged at the extension 12 of the mounting cover 1. The first limiting member 314 has a limiting circular groove 3141 for arranging the mounting protrusion 1511 on the first mounting component 151, and the second limiting member 315 has a limiting strip groove 3151 for arranging the mounting protrusion 1511 of the first mounting component 151. The first limiting member 314 and the second limiting member 315 are fixed in the limiting groove 313 by screws. The support base 31 is also provided with a clearance groove 316 at the arrangement groove 311 for arranging the second mounting component 152 on the bottom surface of the mounting cover 1.

[0040] Reference Figure 4 and Figure 7 In the sealing performance test of the mounting cover 1, the probability of the mounting cover 1 shifting during the sealing performance test is reduced by the cooperation between the fixing mechanism 32 and the support base 31. The fixing mechanism 32 includes multiple fixing blocks 321 for pressing the mounting cover 1 against the support base 31 and a drive assembly 322 for driving the fixing blocks 321. The fixing blocks 321 have a contact surface that abuts against the top surface of the mounting cover 1, and rubber pads 35 are spaced apart along the length of the fixing blocks 321 at the contact surface. The drive assembly 322 includes a drive cylinder 3221 mounted on the top surface of the frame 2 and a transmission linkage 3222 that drives the drive cylinder 3221 and the fixing blocks 321. The transmission linkage assembly 3222 includes a first connecting rod 32221 hinged to the top surface of the piston rod of the drive cylinder 3221, a mounting block 32222 mounted on the top surface of the drive cylinder 3221, and a second connecting rod 32223 hinged at one end to the top surface of the mounting block 32222 and at the other end to the first connecting rod 32221. The hinge point of the second connecting rod 32223 with the first connecting rod 32221 is close to the side of the first connecting rod 32221 that is hinged to the piston rod of the drive cylinder 3221. The fixing block 321 is mounted on the side of the first connecting rod 32221 away from the piston rod of the drive cylinder 3221.

[0041] Reference Figure 8 and Figure 9A support base 21 is provided on the top surface of the frame 2. The top surface of the support base 21 is inclined downward toward the support base 31, and the inclination direction of the top surface of the support base 21 is consistent with the extension direction of the detection opening 13. A sealing assembly 34 is installed on the top surface of the support base 21. The sealing assembly 34 includes a guide rod 341 arranged parallel to the extension direction of the detection opening 13, a guide sleeve 342 installed on the top surface of the support base 21 and cooperating with the guide rod 341, and a sealing cylinder 343 installed on the top surface of the support base 21. The sealing block 33 is installed on the piston rod of the sealing cylinder 343, and the sealing block 33 has a sealing ring 331 that cooperates with the detection opening 13. The piston rod of the sealing cylinder 343 is arranged parallel to the guide rod 341 and extends toward the detection opening 13. In order to improve the stable guidance of the sliding process of the sealing block 33, there are two guide rods 341.

[0042] Reference Figure 3 and Figure 5 The air extraction detection mechanism 4 is arranged on one side of the frame 2. The support base 31 has an air extraction channel 317 that runs through the upper and lower sides of the support base 31 and communicates with the air extraction detection mechanism 4. When testing the sealing performance of the mounting cover 1, the mounting cover 1 is first fixed on the support base 31, and the detection opening 13 of the mounting cover 1 is sealed with a sealing block 33, so that the mounting cover 1 and the support base 31 are in a sealed state. Then, the air extraction detection mechanism 4 extracts the air between the mounting cover 1 and the support base 31 and detects the pressure value. When the pressure drop between the mounting cover 1 and the support base 31 exceeds the qualified value, the sealing performance of the mounting cover 1 is determined to be unqualified.

[0043] Reference Figure 5 The support base 31 is also provided with a laser marking window 318 at the arrangement groove 311, so that the mounting cover 1 can be laser marked at the same time as the sealing performance test.

[0044] The implementation principle of the sealing performance testing device for a lidar mounting cover according to an embodiment of this application is as follows: During the sealing performance testing of the mounting cover 1, the mounting cover 1 is first arranged in the arrangement groove 311 of the support base 31, so that the sealing protrusion 312 on the top surface of the support base 31 and the mounting protrusion 161 of the mounting cover 1 are sealed together. At the same time, the first mounting component 151 in the mounting cover 1 is arranged in the first limiting component and the second limiting component, and the second mounting component 152 in the mounting cover 1 is arranged in the clearance groove 316. Then, the mounting cover 1 is fixed on the support base 31 by the fixing mechanism 32. Then, the sealing block 33 is driven by the sealing component 34 to seal the detection opening 13 of the mounting cover 1, so that the mounting cover 1 and the support base 31 are sealed together. Finally, the air extraction detection mechanism 4 is used to extract air and detect the pressure drop value, thereby judging the sealing performance of the mounting cover 1 and completing the sealing performance testing of the mounting cover 1.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for testing the sealing performance of a lidar mounting cover, characterized in that, The device includes a frame (2), a testing fixture (3) mounted on the top surface of the frame (2), and a vacuum testing mechanism (4) for testing the sealing performance of the mounting cover (1). The testing fixture (3) includes a support base (31) mounted on the top surface of the frame (2), a fixing mechanism (32) mounted on the top surface of the frame (2) and cooperating with the support base (31), a blocking block (33) for blocking the detection opening (13), and a blocking assembly (34) for driving the blocking block (33) to move. The support base (31) has an opening for mounting. The cover (1) has an arrangement groove (311) and the support base (31) is provided with a sealing protrusion (312) that abuts against the bottom surface of the mounting cover (1) at the arrangement groove (311). The outer side wall of the sealing protrusion (312) is sealed and fitted with the mounting protrusion (161) of the sealing strip (16). The sealing block (33) has a sealing ring (331) that fits with the detection opening (13). The support base (31) is also provided with an air extraction channel (317) that runs through the upper and lower sides of the support base (31) and communicates with the air extraction detection mechanism (4).

2. The sealing performance testing device for a lidar mounting cover according to claim 1, characterized in that, The fixing mechanism (32) includes multiple fixing blocks (321) for pressing the mounting cover (1) against the support base (31) and a drive assembly (322) for driving the fixing blocks (321) to move; the drive assembly (322) includes a drive cylinder (3221) mounted on the top surface of the frame (2) and a transmission linkage group (3222) that drives the drive cylinder (3221) and the fixing blocks (321).

3. The sealing performance testing device for a lidar mounting cover according to claim 2, characterized in that, The fixing block (321) has an abutting surface that abuts against the top surface of the mounting cover (1), and rubber pads (35) are provided at intervals along the length direction of the fixing block (321) at the abutting surface.

4. The sealing performance testing device for a lidar mounting cover according to claim 1, characterized in that, The top surface of the frame (2) is provided with a support base (21). The sealing assembly (34) includes a guide rod (341) arranged parallel to the extension direction of the detection opening (13), a guide sleeve (342) installed on the support base (21) and cooperating with the guide rod (341), and a sealing cylinder (343) installed on the top surface of the support base (21). The piston rod of the sealing cylinder (343) is arranged parallel to the guide rod (341) and the piston rod of the sealing cylinder (343) extends toward the detection opening (13).

5. The sealing performance testing device for a lidar mounting cover according to claim 4, characterized in that, The number of guide rods (341) is two.

6. The sealing performance testing device for a lidar mounting cover according to claim 1, characterized in that, The support base (31) has a limiting groove (313) at the arrangement groove (311), and the limiting groove (313) is provided with a first limiting member (314) and a second limiting member (315) for arranging the first mounting component (151). The first limiting member (314) has a limiting circular groove (3141) for arranging the mounting protrusion (1511), and the second limiting member (315) has a limiting strip groove (3151) for arranging the mounting protrusion (1511). The first limiting member (314) and the second limiting member (315) are fixed to the limiting groove (313) by screws.

7. The sealing performance testing device for a lidar mounting cover according to claim 1, characterized in that, The support base (31) has a clearance groove (316) at the arrangement groove (311) for arranging the second mounting assembly (152).

8. The sealing performance testing device for a lidar mounting cover according to claim 1, characterized in that, The support base (31) is also provided with a laser marking window (318) at the arrangement groove (311).

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