Auxiliary tool for obc airtight test

Abstract

The invention discloses an obc airtight test auxiliary jig, and particularly relates to the technical field of obc airtight test.The obc airtight test auxiliary jig is provided with a rotating frame, a first clamping station and a second clamping station, the first clamping station and the second clamping station move alternately, and the protruding end of an eccentric wheel abuts against the inner side face of a corresponding first moving frame through rotation of the eccentric wheel; the first moving frames slide outwards in the rotating frame in the radial direction, the two first moving frames and supporting plates of the first moving frames move in the direction of a conveying strip and the direction of an output strip respectively, after the first moving frames slide in place, the supporting plates move upwards, clamping jaws clamp and support the bottom of the OBC shell in a fixed-point mode, the rotating frame rotates by 90 degrees, and the OBC shell is clamped by the clamping jaws. When the OBC shell is conveyed, a supporting plate and a clamping jaw on the second moving frame face the tail end of the conveying strip, the eccentric wheel rotates repeatedly, the second moving frames on the two sides slide outwards, the supporting plate provided with the OBC shell slides upwards, one station is used for clamping and conveying the OBC shell, the other station is used for airtight testing, waiting time is shortened, and the overall detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of obc air tightness testing, in particular to an obc air tightness testing auxiliary jig. BACKGROUND

[0002] As a key component in a high-voltage electrical system of a vehicle, an OBC is usually integrated with power devices, control circuits and cooling channels, and the structure is usually in the form of a sealed shell. In order to ensure the safety and reliability of the OBC under complex working conditions, especially in the environment of rain, dust, cooling liquid leakage and temperature difference change, long-term stable work, the air tightness detection of the OBC shell and its interface part has become a necessary link in the production and quality control process. The sealing performance is judged by filling test gas into the OBC and detecting the pressure change or leakage amount.

[0003] Through the search, the utility model patent with the publication number CN219301865U discloses an obc air tightness testing auxiliary jig. The part is placed on the placing plate. When the pushing block moves to the direction of the rotating sleeve, the inclined surface below the pushing block will gradually push the connecting plate on the rotating sleeve. The connecting plate and the rotating sleeve overturn to drive the clamping piece to overturn until the upper end of the clamping piece clamps the part.

[0004] The existing air tightness testing auxiliary jig adopts rigid fixation or simple clamping structure. The OBC shell can be subjected to air tightness testing only after clamping and positioning. After the testing is completed, the next part is unloaded and fed. The clamping, conveying and testing processes are sequentially serial, obvious waiting time exists, and the overall detection efficiency is low. SUMMARY

[0005] The purpose of the present application is to provide an obc air tightness testing auxiliary jig to solve the problems mentioned in the background.

[0006] The technical problem solved by the present application is: The existing OBC shell is unloaded and the next part is fed after the testing is completed. The clamping, conveying and testing processes are sequentially serial, obvious waiting time exists, and the overall detection efficiency is low.

[0007] The present application can be realized by the following technical scheme: An obc air tightness testing auxiliary jig, comprising a test bin installed in the middle of a base, one side of the test bin is provided with a conveying strip for positioning and conveying the OBC shell, and the other side of the test bin is provided with an output strip for positioning and outputting the OBC shell, the conveying strip and the output strip are symmetrically arranged about the center axis of the test bin, a rotating frame is rotatably installed in the test bin, and a clamping station one and a clamping station two are slidably arranged in the rotating frame. The inner part of the clamping station one and the clamping station two is provided with a supporting plate which is lifted, the inner cavity bottom of each supporting plate is provided with a clamping jaw which is used for clamping the bottom of the OBC shell, The clamping height of the clamping jaw is lower than the transmission height of the OBC shell, The clamping station one comprises two symmetrically arranged moving frames one, The clamping station two comprises two symmetrically arranged moving frames two, The moving frames one and the moving frames two are arranged in the rotating frame and are elastically limited to slide in the rotating frame, The center of the clamping station one and the clamping station two is provided with a driving shaft rod which is driven by an upper reversible motor, the outer side top and bottom of the driving shaft rod are fixedly provided with eccentric wheels, the protruding ends on the two sides of each eccentric wheel are respectively arranged in abutment with the inner side of the corresponding moving frame one, and the outer surface of the eccentric wheel is in abutment with the inner side of the corresponding moving frame two.

[0008] Further technical improvements of the present application are that the rotating frame comprises an upper rotating plate which is rotationally connected with the inner cavity top surface of the test bin, the top surface of the base is arranged below the upper rotating plate and is provided with a supporting table, the upper end surface of the supporting table is rotationally arranged with a lower rotating plate which is driven by a lower reversible motor, The upper reversible motor is arranged on the lower surface of the upper rotating plate.

[0009] Further technical improvements of the present application are that the conveying strips and the output strips are both provided with two, and the edges of the conveying strips and the output strips are both provided with a plurality of positioning strips which are used for limiting the end of the OBC shell, The interval for the corresponding supporting plate to enter is formed between the adjacent two conveying strips or the adjacent two output strips.

[0010] Further technical improvements of the present application are that the supporting plate is arranged in an L-shaped structure, and the width of the supporting plate is smaller than the width of the interval.

[0011] Further technical improvements of the present application are that the outer wall surface of each moving frame one and moving frame two is provided with a sliding rail, and the bottom of the moving frame one and the moving frame two is outwardly connected with a bottom plate, the upper end of the bottom plate is provided with an electric push rod, the pushing end of each electric push rod is connected with a supporting sliding block which is limited to slide along the corresponding sliding rail, and one end of the supporting sliding block is fixed with the corresponding side supporting plate.

[0012] Further technical improvements of the present application are that the lower surface of the upper rotating plate and the upper surface of the lower rotating plate are both provided with a rail groove which is used for the end of the moving frame one and the moving frame two to extend into, the inner part of the rail groove is provided with a damper, and the end of the damper is connected with the moving frame one or the moving frame two. The damper comprises a damping element and a spring.

[0013] Further technical improvements of the present application are that the inner cavity top surface of the test bin is adjacent to one side of the upper rotating plate and is provided with a docking seat, a three-way valve is installed on the docking seat, the three-way valve comprises a common port and two switching interfaces, one switching interface is connected with a vacuum pump through a pipeline, the other switching interface is connected with a nitrogen source through a hose, the common port is docked with a gas inlet of the OBC shell, and the common port is provided with a pressure sensor.

[0014] Compared with the prior art, the present application has the following beneficial effects: 1. By setting the rotating frame and the alternately moving clamping station one and clamping station two, the protruding end of the eccentric wheel abuts against the inner side surface of the corresponding moving frame one, so that the moving frame one slides outward in the radial direction in the rotating frame, so that the two moving frames one and the supporting plates thereof move towards the direction of the conveying belt and the output belt respectively, after sliding into position, the supporting plates move upward and the clamping jaws clamp and support the bottom of the OBC shell, the rotating frame rotates by 90 degrees, the clamping station two rotates to the position of the clamping station one, the supporting plates and the clamping jaws thereof on the moving frame two face the end of the conveying belt, at this time, the eccentric wheel is repeatedly rotated, the protruding end thereof pushes the two moving frames two, the two moving frames two slide outward, in this state, the supporting plates with the OBC shells slide upward, facilitating the air tightness test of the OBC shells in the moving frame one, one station is used for clamping and conveying the OBC shells, and the other station is used for air tightness test, so that the waiting time is reduced and the overall detection efficiency is improved. 2. By cooperating the docking seat with the clamping station one and the clamping station two in the rotating frame, the OBC shell can automatically complete the docking, vacuumizing or inflating and pressure detection process after completing clamping and positioning, manual intervention is reduced, the three-way valve is arranged on the docking seat, the vacuum pump and the nitrogen source are connected with the switching interfaces thereof respectively, the vacuumizing test and the inflating test of the OBC shell are performed according to the test requirement, and the switching is completed through a single valve body, so that the gas circuit complexity is reduced and the flexibility of the test process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to facilitate the understanding of those skilled in the art, the present application will be further described below with reference to the drawings.

[0016] Figure 1 is a schematic view of the external structure of the present application; Figure 2 is a schematic view of the external structure of the present application; Figure 1 is a partial enlarged view of A in the present application; Figure 3 is a schematic view of the external structure of the present application; Figure 4 is a schematic view of the external structure of the present application; Figure 5 is a schematic view of the external structure of the present application;

[0017] In the diagram: 1. Test chamber; 2. Conveyor belt; 3. Output belt; 4. Positioning bar; 5. Upper rotating plate; 6. Drive shaft; 7. Motion frame one; 8. Lower rotating plate; 9. Eccentric wheel; 10. Slide rail; 11. Support slider; 12. Support plate; 13. Gripper; 14. Electric push rod; 15. Damper; 16. Rail groove; 17. Motion frame two; 18. Base plate; 19. Docking seat; 20. Three-way valve; 21. Support platform. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0019] Please see Figures 1-5 As shown, the present invention provides an auxiliary fixture for OBC airtightness testing, including a test chamber 1 installed in the middle of the base. One side of the test chamber 1 is provided with a conveyor belt 2 for fixed-point conveying of OBC shells, and the other side of the test chamber 1 is provided with an output belt 3 for fixed-point output of OBC shells. The conveyor belt 2 and the output belt 3 are symmetrically arranged about the central axis of the test chamber 1. A rotating frame is rotatably installed inside the test chamber 1, and a clamping station one and a clamping station two are slidably provided inside the rotating frame. Both clamping station one and clamping station two are equipped with lifting support plates 12 inside, and each support plate 12 has a gripper 13 at the bottom of its inner cavity for clamping the bottom of the OBC shell. The clamping height of gripper 13 is lower than the transmission height of the OBC housing; Clamping station 1 includes two symmetrically arranged motion frames 7; Clamping station two includes two symmetrically arranged motion frames 17; Both motion frame 17 and motion frame 217 are set inside the rotating frame and are elastically limited and slid within the rotating frame; The center of clamping station one and clamping station two is provided with a drive shaft 6 driven by an upper forward and reverse motor. Eccentric wheels 9 are fixed on the top and bottom of the outer side of the drive shaft 6. The protruding ends on both sides of each eccentric wheel 9 are respectively abutted against the inner side of the corresponding motion frame one 7, and the outer surface of the eccentric wheel 9 abuts against the inner side of the corresponding motion frame two 17.

[0020] During operation, the OBC housing to be tested is conveyed to the clamping station position on the side adjacent to the test chamber 1 via the conveyor belt 2 in a fixed manner; Once the OBC housing is in position, the upper forward and reverse motors drive the drive shaft 6 to rotate. As the drive shaft 6 rotates, it drives the two eccentric wheels 9 to rotate synchronously. With the rotation of the eccentric wheels 9, their protruding ends abut against the inner surfaces of the corresponding motion frames 7, causing the motion frames 7 to slide radially outward within the rotating frame. This allows the two motion frames 7 and their support plates 12 to move towards the conveyor belt 2 and the output belt 3, respectively. Since the clamping height of the grippers 13 is lower than the transmission height of the OBC housing, it will not collide with the OBC housing during transmission. After sliding into position, the support plate 12 moves upward, and the grippers 13 clamp and support the bottom of the OBC housing at a fixed point. This achieves stable positioning of the OBC housing without interfering with the outer sealing surface of the OBC housing, providing reliable support conditions for subsequent airtightness testing. Meanwhile, as the eccentric wheel 9 continues to rotate, its outer surface gradually comes into contact with the inner surface of the corresponding motion frame 17, pushing the motion frame 17 to slide radially inward within the rotating frame. During this process, the motion frame 7 remains stable under the action of the elastic limiting structure. Through the rotation of the eccentric wheel 9, the coordinated movement of the motion frame 7 and the motion frame 17 is achieved, thereby completing the switching between the two clamping positions. When the eccentric wheel 9 continues to rotate or rotates in the opposite direction, the motion frame 7 automatically resets under the action of the elastic limiting structure, ensuring that the eccentric wheel 9 maintains contact with both the motion frame 7 and the motion frame 17 throughout the entire rotation process, guaranteeing the continuity and stability of the clamping and switching process. When the rotating frame rotates 90 degrees, the second clamping station rotates to the position of the first clamping station, that is, the support plate 12 and its grippers 13 on the second motion frame 17 face the end of the conveyor belt 2. At this time, the eccentric wheel 9 repeats the rotation operation, and its protruding end pushes against the second motion frame 17 on both sides. The outer surface is in contact with the first motion frame 7, so that the second motion frame 17 on both sides slides outward. The first motion frame 7 changes from the initial outward sliding state to resetting inward in the radial direction. In this state, the support plate 12 with the OBC shell slides upward, which facilitates the airtightness test of the OBC shell in the first motion frame 7.

[0021] See Figure 1 As shown, the rotating frame includes an upper rotating plate 5 that is rotatably connected to the top surface of the inner cavity of the test chamber 1. A support platform 21 is installed on the top surface of the base and directly below the upper rotating plate 5. A lower rotating plate 8 driven by a lower forward and reverse motor is rotatably installed on the upper end surface of the support platform 21. The forward and reverse motors are mounted on the lower surface of the upper rotating plate 5.

[0022] The lower forward and reverse motor drives the rotation of the rotating frame, thereby switching the positions of clamping station one and clamping station two. The upper forward and reverse motor drives the rotation of the drive shaft 6, and through the pushing force of the eccentric wheel 9, clamping station one or clamping station two is in the open or retracted state. In the open state, it is convenient to load or unload the OBC shell. In the retracted state, it is convenient to conduct airtightness testing in the test chamber 1.

[0023] See Figure 1 and Figure 3 As shown, there are two conveyor belts 2 and two output belts 3, and the edges of both conveyor belts 2 and output belts 3 are provided with several positioning strips 4 that define the ends of the OBC housing. A spacing is formed between two adjacent conveyor belts 2 or two adjacent output belts 3 for the corresponding support tray 12 to enter; The support plate 12 is configured as an L-shaped structure, and the width of the support plate 12 is less than the width of the spacing.

[0024] The positioning bar 4 limits the OBC housing to maintain a stable posture and move along a preset path during transport and output, thus preventing lateral deviation. During the OBC housing loading stage, the support plate 12 passes through the gap between the two conveyor belts 2 from bottom to top and clamps the OBC housing. During the testing phase of the OBC shell, the support plate 12 continues to rise and enter the designated position inside the test chamber 1 to facilitate its airtightness testing. During the OBC housing discharge stage, the support plate 12 passes through the gap between the two output strips 3 from top to bottom. The positioning strip 4 inside the output strip 3 restricts the OBC housing, releasing the clamping effect on the OBC housing. Then, the support plate 12 moves downward until the clamping height of the gripper 13 is lower than the transmission height of the OBC housing.

[0025] See Figure 2 As shown, each of the first and second motion frames 17 has a slide rail 10 installed on its outer wall, and the bottom of each of the first and second motion frames 17 is connected to a base plate 18. An electric push rod 14 is installed on the upper end of the base plate 18. The pushing end of each electric push rod 14 is connected to a support slider 11 that slides along the corresponding slide rail 10. One end of the support slider 11 is fixed to the support plate 12 on the corresponding side.

[0026] When the electric push rod 14 extends, it pushes the support slider 11 to slide upward along the slide rail 10, thereby driving the support plate 12 to rise vertically, so that the support plate 12 enters below the OBC housing and forms support for it; when the electric push rod 14 retracts, the support slider 11 slides downward under the limiting action of the slide rail 10, driving the support plate 12 to descend synchronously and exit the support position.

[0027] See Figure 2 As shown, the lower surface of the upper rotating plate 5 and the upper surface of the lower rotating plate 8 are provided with rail grooves 16 for the ends of the first moving frame 7 and the second moving frame 17 to extend into. A damper 15 is installed inside the rail groove 16, and the end of the damper 15 is connected to the first moving frame 7 or the second moving frame 17. The damper 15 includes a damping element and a spring.

[0028] When the first motion frame 7 and the second motion frame 17 are pushed by the protruding end of the eccentric wheel 9, the damping element is squeezed in the rail groove 16 and the spring is elastically compressed. After the eccentric wheel 9 is released from the push, the spring releases its elastic potential energy to drive the first motion frame 7 and the second motion frame 17 to reset.

[0029] See Figure 1 and Figure 5 As shown, a docking seat 19 is installed on the top surface of the inner cavity of the test chamber 1, near the upper rotating plate 5. A three-way valve 20 is installed on the docking seat 19. The three-way valve 20 includes a common port and two switching ports. One switching port is connected to a vacuum pump through a pipe, and the other switching port is connected to a nitrogen source through a hose. The common port is connected to the gas inlet of the OBC shell. A pressure sensor is installed on the common port.

[0030] After the rotating frame rotates and the OBC housing reaches the airtightness test position, the support plate 12 rises, allowing the gas inlet of the OBC housing to be sealed and connected to the common port of the three-way valve 20 through the mating seat 19. Subsequently, by controlling the valve position of the three-way valve 20, the common port can be selectively connected to a vacuum pump or a nitrogen source: when the three-way valve 20 is switched to the position connected to the vacuum pump, a vacuum operation is performed inside the OBC housing; when the three-way valve 20 is switched to the position connected to the nitrogen source, test gas is introduced into the OBC housing.

[0031] After vacuuming or filling with test gas, the three-way valve 20 switches to the closed or pressure-holding state. The pressure sensor collects real-time pressure change data of the sealed cavity inside the OBC housing and feeds the pressure signal back to the control system. By monitoring the pressure change inside the OBC housing within a preset time, the airtightness performance of the OBC housing is determined, thus completing the airtightness test process.

[0032] Because the pressure sensor is located at the common port of the three-way valve 20, it remains in communication with the sealed cavity inside the OBC housing regardless of the valve position of the three-way valve 20, thus ensuring the continuity and accuracy of the pressure detection data. Through the cooperation of the docking seat 19 with the first and second clamping stations inside the rotating frame, the OBC housing can automatically complete the docking, vacuuming or inflation and pressure detection process after clamping and positioning, reducing manual intervention. By setting the three-way valve 20 on the docking seat 19 and connecting the vacuum pump and nitrogen source to its switching interface, the vacuuming test and inflation test of the OBC housing can be switched through a single valve body according to the test requirements, reducing the complexity of the gas path and improving the flexibility of the test process.

[0033] In use, this invention employs a rotating frame and alternating clamping stations one and two. The eccentric wheel 9 rotates, its protruding end abutting against the inner surface of the corresponding moving frame 7, causing the moving frame 7 to slide radially outward within the rotating frame. This allows the two moving frames 7 and their supporting plates 12 to move towards the conveyor belt 2 and output belt 3, respectively. After sliding into position, the supporting plate 12 moves upward and is clamped and supported at a fixed point on the bottom of the OBC housing by the gripper 13. The rotating frame rotates 90 degrees, and the clamping station two... Rotate to the position of clamping station one. The support plate 12 and its grippers 13 on the second motion frame 17 face the end of the conveyor belt 2. At this time, the eccentric wheel 9 rotates repeatedly. Its protruding end pushes against the second motion frame 17 on both sides. The second motion frame 17 on both sides slides outward. In this state, the support plate 12 with the OBC shell slides upward, which facilitates the airtightness test of the OBC shell in the first motion frame 7. One station is used for clamping and conveying the OBC shell, and the other station is used for airtightness testing, which reduces waiting time and improves the overall testing efficiency. By cooperating with the docking seat 19 and the first and second clamping stations inside the rotating frame, the OBC housing can automatically complete the docking, vacuuming or inflation and pressure testing processes after clamping and positioning, reducing manual intervention. By setting a three-way valve 20 on the docking seat 19 and connecting the vacuum pump and nitrogen source to its switching interface, the vacuuming test and inflation test of the OBC housing can be performed according to the test requirements, and the switching can be completed through a single valve body, reducing the complexity of the gas path and improving the flexibility of the test process.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An obc airtight test auxiliary jig, characterized by: The utility model relates to a test bin (1) is installed in the middle of pedestal, one side of test bin (1) is equipped with the conveying strip (2) of fixed point conveying OBC shell, and the other side of test bin (1) is equipped with the output strip (3) of fixed point output OBC shell, conveying strip (2) and output strip (3) are symmetrically arranged about the center axis of test bin (1), the inside rotation of test bin (1) is installed with rotating frame, and the inside sliding of rotating frame is equipped with clamping station one and clamping station two, The inside of clamping station one and clamping station two is lifted and is equipped with support apron (12), and the inner chamber bottom of each support apron (12) is installed with the jaw (13) of fixed point clamping to the bottom of OBC shell, The clamping height of jaw (13) is lower than the transmission height of OBC shell, Clamping station one includes two symmetrically arranged motion frames one (7), Clamping station two includes two symmetrically arranged motion frames two (17), Motion frame one (7) and motion frame two (17) are arranged in the rotating frame and elastically limit sliding in the rotating frame, The center of clamping station one and clamping station two is equipped with the drive shaft rod (6) driven by upper reversible motor, the outer side top and bottom of drive shaft rod (6) are fixed with eccentric wheel (9), and the protruding end of each eccentric wheel (9) two sides is respectively arranged with the inner side of corresponding motion frame one (7) abutment, and the outer surface of eccentric wheel (9) is in abutment with the inner side of corresponding motion frame two (17).

2. The obc hermetic test auxiliary jig according to claim 1, wherein, Rotating frame includes upper rotating plate (5) rotationally connected with the inner chamber top surface of test bin (1), the top surface of pedestal and located the directly below of upper rotating plate (5) is installed with support table (21), and the upper end surface of support table (21) is rotationally installed with lower rotating plate (8) driven by lower reversible motor, The upper reversible motor is installed on the lower surface of upper rotating plate (5).

3. The obc hermetic test auxiliary jig according to claim 1, wherein Conveying strip (2) and output strip (3) are both equipped with two, and the edge of conveying strip (2) and output strip (3) is equipped with a plurality of positioning strips (4) for limiting the end of OBC shell, The interval for corresponding support apron (12) to enter is formed between adjacent two conveying strips (2) or adjacent two output strips (3).

4. The obc hermetic test auxiliary jig according to claim 3, wherein Support apron (12) is arranged as L-shaped structure, and the width of support apron (12) is less than the width of interval.

5. The obc hermetic test auxiliary jig according to claim 1, wherein, The outer wall surface of each motion frame one (7) and motion frame two (17) is installed with slide rail (10), and the bottom of motion frame one (7) and motion frame two (17) is outwardly connected with bottom plate (18), the upper end of bottom plate (18) is installed with electric push rod (14), the pushing end of each electric push rod (14) is connected with support sliding block (11) limit sliding along corresponding slide rail (10), and one end of support sliding block (11) is fixed with corresponding side support apron (12).

6. The obc hermetic test auxiliary jig according to claim 2, wherein The lower surface of upper rotating plate (5) and the upper surface of lower rotating plate (8) are both equipped with rail groove (16) for the end of motion frame one (7) and motion frame two (17) to extend, the inside of rail groove (16) is installed with damper (15), and the end of damper (15) is connected with motion frame one (7) or motion frame two (17). The damper (15) comprises a damping element and a spring.

7. The obc hermetic test auxiliary jig according to claim 1, wherein The inner cavity top surface of the test chamber (1) is adjacent to one side of the upper rotating plate (5) and is provided with a butt joint seat (19), and the butt joint seat (19) is provided with a three-way valve (20). The three-way valve (20) comprises a common port and two switching interfaces. One of the switching interfaces is connected with a vacuum pump through a pipeline, and the other switching interface is connected with a nitrogen source through a hose. The common port is butt jointed with a gas connection port of the OBC shell.

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