Airtightness testing apparatus for electric actuators

Abstract

This invention discloses an airtightness testing device for electric actuators, comprising a conveying mechanism, a transfer mechanism, a carrier, and a clamping mechanism respectively disposed on the top of a lower frame; the conveying mechanism carries and transports the electric actuator via a pallet; a lifting component on the conveying mechanism is adapted to control the pallet's movement or stationary position; the transfer mechanism is positioned above the conveying mechanism and is adapted to transfer the electric actuator on the pallet to a receiving slot on the top of the carrier when the pallet is stationary; the carrier is connected to the lower frame via a drive mechanism; the drive mechanism is adapted to transport the carrier to the clamping mechanism or the transfer mechanism; a pressure block on the clamping mechanism is positioned above the carrier; a mating groove is formed at the bottom of the pressure block, adapted to enclose the receiving slot to form a closed test chamber; the mating groove is connected to a detection mechanism installed via a gas pipeline. This invention enables automatic testing of the airtightness of electric actuators, is simple to operate, can achieve automated testing, greatly improves work efficiency, and reduces labor costs.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing devices, and more specifically to an airtightness testing device for an electric actuator. Background Technology

[0002] Electric actuators convert their own energy into mechanical motion, with the final output being rotary mechanical motion. Electric actuators must have good sealing properties to ensure waterproofing and dustproofing during use, thereby protecting the electrical performance of electronic components.

[0003] The production line for electric actuators includes, in sequence, a machine assembly station, an electrical component testing station, an airtightness testing station, and a packaging station. Existing airtightness testing equipment requires manual operation and testing, making the entire process complex and inefficient. Furthermore, existing airtightness testing equipment is incompatible with upstream automated production and testing processes. Summary of the Invention

[0004] This invention proposes an airtightness testing device for electric actuators to solve the problems of complex manual testing operations and low work efficiency.

[0005] The present invention discloses an airtightness testing device for an electric actuator, comprising a conveying mechanism, a transfer mechanism, a carrier, and a clamping mechanism respectively disposed on the top of the lower frame; The conveying mechanism carries the electric actuator on a pallet; the conveying mechanism is equipped with a lifting component located below the pallet, which is suitable for controlling the pallet to move or stay. The transfer mechanism is positioned above the conveying mechanism and is adapted to transfer the electric actuator on the pallet to the receiving slot on the top of the carrier when the pallet is in a stationary state. The carrier is connected to the lower frame via a drive mechanism; the drive mechanism is adapted to transport the carrier to the clamping mechanism and / or the transfer mechanism. The pressing mechanism is equipped with a pressing block that can be raised and lowered; the pressing block is positioned above the carrier; the bottom of the pressing block is provided with a mating groove, which is connected to a detection mechanism installed on the lower frame via a gas pipeline; The control mechanism mounted on the lower frame is adapted to control the testing mechanism to perform an airtightness test on the electric actuator placed in the test chamber when the mating groove and the receiving groove are closed to form a test chamber. Through the cooperation of the conveying mechanism, transfer mechanism, carrier, clamping mechanism, and testing mechanism, automatic testing of the airtightness of the electric actuator can be achieved. The operation is simple, and automated testing can be realized, greatly improving work efficiency and reducing labor costs.

[0006] Optionally, the carrier is detachably mounted on top of the movable slide plate of the drive mechanism; The lower end of the carrier is provided with a mounting flange on its outer side wall; a positioning pin is provided between the mounting flange and the movable sliding plate; The movable sliding plate is rotatably provided with a limiting lever; the rotation axis of the limiting lever is vertically arranged, and the radial extension of the limiting lever is adapted to be placed directly above the mounting flange to limit the mounting flange in the vertical direction. The top of the vehicle is provided with a sealing groove; the sealing groove is arranged around the outside of the receiving groove, and a sealing ring is embedded in the sealing groove; The top of the carrier is provided with a support protrusion; the support protrusion is distributed between the sealing groove and the receiving groove, and is suitable for supporting the upper edge of the lower housing of the electric actuator. Using the above solution, the carrier and the movable slide plate can be quickly replaced through the cooperation of the positioning pin, the limiting lever, and the mounting flange.

[0007] Optionally, the drive mechanism includes a drive base plate, a drive slide rail, and a movable slide plate; The drive base plate is mounted on the lower frame; The drive slide rail is horizontally disposed on the top of the drive base plate and extends along the first direction; the drive slide rail includes a transfer mating end and a pressing mating end disposed opposite to each other; the transfer mating end is disposed opposite to the transfer mechanism, and the pressing mating end is disposed opposite to the pressing block; The movable slide plate is positioned above the drive slide rail and is slidably connected to the drive slide rail via a drive slider; a drive cylinder extending in a first direction is provided between the movable slide plate and the drive base plate; The bottom of the movable slide plate is provided with a first abutting block; the first abutting block is adapted to be spaced apart from the drive base plate when the movable slide plate is placed at the transfer mating end; the first abutting block is also adapted to abut against the second abutting block on the top of the drive base plate when the movable slide plate is placed at the pressing mating end; The drive base plate is also equipped with a second photoelectric sensor connected to the control mechanism, which is suitable for detecting whether there is an electric actuator in the receiving slot when the movable slide plate is placed at the transfer mating end. By adopting the above solution, the cooperation between the first and second abutment blocks effectively protects the carrier and extends its service life.

[0008] Optionally, the clamping mechanism includes a press and the clamping block; The press includes a hydraulic cylinder and a movable pressure plate respectively mounted on the press frame; the hydraulic cylinder is adapted to drive the movable pressure plate to move up and down. The outer side wall at the upper end of the pressure block is provided with a pull-out protrusion, and the pressure block is detachably connected to the pull-out groove at the bottom of the movable pressure plate through the pull-out protrusion. A knob plunger is provided between the pull-out protrusion and the movable pressure plate; An air pipe connector connected to the mating groove is installed on the outer side wall of the lower end of the pressure block. The air pipe connector is connected to the detection mechanism through a gas pipeline. The inner wall of the mating groove is adapted to be spaced apart from the electric actuator placed in the test chamber when the mating groove and the receiving groove enclose it to allow for gas flow. This design enables quick replacement between the pressure block and the movable pressure plate.

[0009] Optionally, the conveying mechanism includes a transmission belt, the lifting assembly, and a limiting stop; There are two drive belts, which are parallel and spaced apart; the conveyor frame of the drive belt is mounted on the lower frame by a corresponding conveyor mounting block; the drive belt is adapted to convey the tray placed on the top surface of the two drive belts in the horizontal direction. The lifting assembly is vertically arranged and positioned between the two transmission belts; the lower end of the lifting assembly is a fixed end, connected to the lower frame; the upper end of the lifting assembly is a driving end, adapted to drive the tray to contact or separate from the top surface of the transmission belt. The limiting block is disposed at the top of the lower frame and is located on the side of the transmission belt away from the lifting assembly; the limiting part of the limiting block is positioned above the tray and is adapted to abut against the tray when the tray separates from the top surface of the transmission belt. The control mechanism is adapted to control the transfer mechanism to transfer the electric actuator on the pallet into the receiving slot when the pallet separates from the top surface of the drive belt. Using the above scheme, the pallet can be stopped or released by setting up a lifting assembly.

[0010] Optionally, the conveying mechanism further includes a first sensor and a first stopper; The first sensor is disposed at the top of the lower frame and on the side of the conveyor belt away from the lifting assembly; the first sensor is connected to the control mechanism and is adapted to detect whether the tray being conveyed on the conveyor belt has moved to directly above the lifting assembly; The first stopper is placed between the two drive belts; the fixed end of the first stopper is installed on the top of the lower frame; The first stopper is connected to the control mechanism and is adapted to control the pallet to move or stay. The control mechanism is adapted to, when the pallet moves to a position directly above the lifting assembly, first drive the drive end of the first stopper to stop the pallet located directly above the lifting assembly, and then control the lifting assembly to drive the pallet to separate from the top surface of the transmission belt. This scheme ensures smooth insertion of the lifting assembly into the pallet above it.

[0011] Optionally, the tray includes an upper support block, a support column, and a lower support block connected sequentially from top to bottom; The top of the upper support block is provided with a slot for accommodating the lower housing of the electric actuator; The top of the upper support block is provided with a limiting block; one end of the limiting block is connected to the upper support block through an oblong hole; the other end of the limiting block extends into the slot to limit the electric actuator placed in the slot in the horizontal direction. The lower support block is vertically provided with a positioning hole, which is adapted to cooperate with the drive end of the lifting assembly.

[0012] Optionally, the transfer mechanism includes a gantry, a horizontal drive module, a lifting drive module, and pneumatic fingers; The gantry frame is mounted on top of the lower frame; the top crossbeam of the gantry frame is located above the conveying mechanism and the carrier, and between the conveying mechanism and the carrier; The fixed end of the horizontal drive module is installed on the top crossbeam of the gantry frame. The drive end of the horizontal drive module is connected to the fixed end of the lifting drive module. The drive end of the lifting drive module is connected to the fixed end of the pneumatic finger. The drive end of the pneumatic finger is adapted to grip the electric actuator.

[0013] Optionally, the conveying mechanism is adapted to convey the tray along a first direction; The drive mechanism is adapted to drive the vehicle to move along the first direction; The transfer mechanism is adapted to transfer the electric actuator along the second direction; The first direction and the second direction are perpendicular to each other and lie in the same horizontal plane; The lifting components in the conveying mechanism are two, and are spaced apart along the first direction; The transfer mechanism has two transfer devices, symmetrically arranged on both sides of the transfer mechanism; each transfer device of the transfer mechanism corresponds to a lifting component. The driving mechanism has two driving devices, which are spaced apart along the first direction; each driving device of the driving mechanism is provided with a corresponding carrier; the carrier corresponds one-to-one with the transfer device of the transfer mechanism. Two clamping mechanisms are provided, spaced apart along the first direction and respectively located at both ends of the drive mechanism; each clamping mechanism corresponds to one of the carriers. This design allows the airtightness testing device to test two electric actuators, saving space and improving work efficiency.

[0014] Optionally, the control mechanism is located in the lower middle part of the lower frame; The upper frame is covered by the top edge of the lower frame; the transfer mechanism, the carrier, the clamping mechanism and the driving mechanism are all distributed in the inner cavity of the upper frame; a channel for the transfer mechanism to pass through is opened on the outer side wall of the upper frame; The detection mechanism includes a leak detector mounted on the upper frame and a gas pipeline connected to the leak detector.

[0015] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: By coordinating the conveying mechanism, transfer mechanism, carrier, clamping mechanism and testing mechanism, the airtightness of electric actuators can be automatically tested. The operation is simple and can realize automated testing, which greatly improves work efficiency and reduces labor costs. The pallet can be stopped or released by the cooperation between the lifting component and the first stop device; The quick-change mechanism between the carrier and the movable slide, and between the pressure block and the movable pressure plate, allows workers to change different carriers and pressure blocks, thereby adapting to different models of electric actuators. The cooperation between the first and second abutment blocks effectively protects the vehicle and extends its service life.

[0016] The above description of the disclosure and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. Attached Figure Description

[0017] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the airtightness testing device in this invention; Figure 2 This is a top view (a) of the airtightness testing device in this invention. Figure 3 This is a three-dimensional schematic diagram of the airtightness testing device in this invention; Figure 4 This is a schematic diagram showing the clamping of the pressure block and the carrier in this invention; Figure 5 This is a schematic diagram of the conveying mechanism in this invention; Figure 6 This is a partial schematic diagram of the conveying mechanism in this invention; Figure 7 This is a schematic diagram of the tray in this invention; Figure 8 This is a schematic diagram of the lifting assembly in this invention; Figure 9 This is a schematic diagram of the transfer mechanism in this invention; Figure 10 This is a schematic diagram of the vehicle and drive mechanism in this invention; Figure 11 This is a partial structural diagram of the vehicle and drive mechanism in this invention; Figure 12 This is a partial cross-sectional schematic diagram of the clamping block and the carrier in this invention; Figure 13 This is a schematic diagram of the pressure block in the present invention; Figure 14 This is a top view (II) of the airtightness testing device in this invention.

[0019] Explanation of icon numbers: 11. Lower frame; 111. Fixing plate; 12. Upper frame; 13. Identification device; 2. Conveying mechanism; 21. Transmission belt; 22. Lifting assembly; 221. Lifting mounting plate; 222. Lifting cylinder; 223. Lifting abutment plate; 224. Positioning pin; 23. Limit stop; 24. First sensor; 25. First stop device; 26. Conveying mounting block; 27. Second sensor; 28. Second stop device; 29. ​​First photoelectric sensor; 3. Transfer mechanism; 31. Gantry; 32. Horizontal drive module; 33. Lifting drive module; 34. Pneumatic fingers; 4. Carrier; 41. Receiving groove; 42. Mounting flange; 43. Sealing groove; 44. Supporting protrusion; 45. Locating pin; 5. Clamping mechanism; 51. Clamping block; 511. Mating groove; 512. Pull-out flange; 52. Press frame; 53. Hydraulic cylinder; 54. Movable pressure plate; 55. Knob plunger; 6. Testing institutions; 7. Drive mechanism; 71. Drive base plate; 711. Second abutment block; 72. Drive slide rail; 73. Movable slide plate; 731. First abutment block; 74. Limit lever; 75. Drive cylinder; 76. Second photoelectric sensor; 8. Pallet; 81. Upper support block; 811. Slot; 82. Support column; 83. Lower support block; 831. Positioning hole; 84. Limiting block; 85. Identification label; 9. Electric actuator. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0021] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0022] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0024] Example 1 This embodiment provides an airtightness testing device for electric actuators, used to detect the airtightness of electric actuators.

[0025] Specifically, the production line for electric actuators includes a complete assembly station, an electrical component testing station, and an airtightness testing station, arranged sequentially. The airtightness testing device in this embodiment is suitable for use at the airtightness testing station. The complete assembly station is used to assemble components into a finished electric actuator. The electrical component testing station is used to test the performance of the finished electric actuator. The airtightness testing station uses the airtightness testing device to perform airtightness testing on the finished electric actuator.

[0026] In this embodiment, the outer shell of the electric actuator is formed by fastening together an upper shell and a lower shell. The lower shell has an upper edge protrusion on its upper outer periphery, and the upper shell has a lower edge protrusion on its lower outer periphery that abuts against the top surface of the upper edge protrusion. When the upper and lower edge protrusions are abutted, they form the edge protrusions of the electric actuator 9.

[0027] Please see Figures 1-3 As shown, the airtightness testing device includes a frame, a conveying mechanism 2, a transfer mechanism 3, a carrier 4, a clamping mechanism 5, a testing mechanism 6, a drive mechanism 7, a tray 8, and a control mechanism. The conveying mechanism 2, the transfer mechanism 3, the clamping mechanism 5, and the drive mechanism 7 are all located on top of the lower frame 11 of the frame.

[0028] The conveying mechanism 2 carries the electric actuator 9 via a pallet 8. The pallet 8 is positioned above the conveying mechanism 2 to carry the electric actuator 9. The conveying mechanism 2 is equipped with a lifting assembly 22 located below the pallet 8 (e.g., Figure 6 (As shown). The lifting assembly 22 is adapted to control the movement or stationary position of the pallet 8. Specifically, the lifting assembly 22 drives the pallet 8 to rise and fall, thereby controlling the contact or separation of the pallet 8 from the top surface of the conveying mechanism 2. When the pallet 8 is in contact with the top surface of the conveying mechanism 2, the top surface of the conveying mechanism 2 can drive the pallet 8 to move through friction, i.e., the pallet 8 is in a moving state. When the pallet 8 is separated from the top surface of the conveying mechanism 2, the top surface of the conveying mechanism 2 cannot drive the pallet 8 to move, i.e., the pallet 8 is in a stationary state.

[0029] The transfer mechanism 3 is positioned above the conveying mechanism 2. The carrier 4 is positioned above and mounted on the drive mechanism 7. When the pallet 8 is in a stationary state, the transfer mechanism 3 is adapted to transfer the electric actuator 9 on the pallet 8 to the receiving slot 41 on top of the carrier 4 (e.g., Figure 10 (As shown). The drive mechanism 7 is adapted to transport the carrier 4 to the clamping mechanism 5, or to transport the carrier 4 to the transfer mechanism 3.

[0030] A pressure block 51 is provided on the clamping mechanism 5 in a height-adjustable manner (e.g., Figure 4 and Figure 12 (As shown). When the drive mechanism 7 transports the carrier 4 to the clamping mechanism 5, the pressure block 51 is placed above the carrier 4. The bottom of the pressure block 51 has a mating groove 511. When the drive mechanism 7 transports the carrier 4 to the clamping mechanism 5, the pressure block 51 descends to abut against the carrier 4 and closes, the mating groove 511 and the receiving groove 41 enclose a closed test chamber to accommodate the electric actuator 9.

[0031] The testing mechanism 6 is mounted on the lower frame 11 and is connected to the mating groove 511 via a gas pipeline. When the mating groove 511 and the receiving groove 41 enclose a closed test chamber, the testing mechanism 6 is suitable for performing an airtightness test on the electric actuator 9 placed in the test chamber and feeding back the test results to the control mechanism.

[0032] The control mechanism is mounted on the lower frame 11 and is electrically connected to the conveying mechanism 2, the transfer mechanism 3, the pressing mechanism 5, the detection mechanism 6 and the drive mechanism 7 respectively.

[0033] Furthermore, to ensure that the tested electric actuator 9 can be tracked afterward, an identification device 13 is provided on the top of the lower frame 11 (such as...). Figure 5 (As shown). The identification device 13 is distributed opposite to the lifting assembly 22. The identification device 13 is connected to the control mechanism. An identification tag 85 is provided on the tray 8.

[0034] When the pallet 8 is in a stationary state due to the lifting assembly 22, the identification device 13 is adapted to identify the identification label 85 on the pallet 8; the control mechanism is adapted to obtain the product information of the electric actuator 9 placed on the pallet 8 based on the identification result of the identification device 13.

[0035] In this embodiment, the lifting component 22 in the conveying mechanism 2 is one unit. The transfer device in the transfer mechanism 3 is one unit. The drive device in the drive mechanism 7 is one unit. The carrier 4 is one unit. The clamping mechanism 5 is one unit. The transfer mechanism 3 is positioned between one end of the lifting component 22 and one end of the drive mechanism 7. The transfer mechanism 3 is positioned at the other end of the drive mechanism 7.

[0036] In this embodiment, the working steps of the airtightness testing device are as follows: S1. When the tray 8 on the conveying mechanism 2 moves to the top of the lifting component 22, the control mechanism controls the tray 8 to separate from the top surface of the conveying mechanism 2 through the lifting component 22, so that the tray 8 is in a stationary state.

[0037] S2. When the pallet 8 located directly above the lifting assembly 22 is in a stationary state, the control mechanism controls the identification device 13 to identify the identification label 85 on the pallet 8 to obtain the product information of the electric actuator 9 placed on the pallet 8 (i.e., obtain the product information of the test piece); at the same time, the control mechanism also controls the transfer mechanism 3 to clamp the electric actuator 9 placed on the pallet 8 (i.e., clamp the test piece) and transfer the test piece to the receiving slot 41 of the carrier 4.

[0038] S3. The control mechanism drives the carrier 4 to move through the drive mechanism 7, so that the test piece placed in the receiving slot 41 is moved directly below the pressure block 51.

[0039] S5. The test piece is moved to directly below the pressure block 51. The control mechanism drives the pressure block 51 to press down through the clamping mechanism 5, so that the pressure block 51 abuts and closes with the carrier 4, and the mating groove 511 and the receiving groove 41 enclose a closed test cavity. At this time, the test piece is placed in the test cavity.

[0040] S6. The control mechanism injects a fixed amount of gas (i.e., air) into the test chamber through the gas pipeline controlled by the detection mechanism 6. Subsequently, the detection mechanism 6 detects the gas pressure in the test chamber and sends the detection result to the control mechanism. The control mechanism compares the detection result with the airtightness threshold. If the detection result of the gas pressure in the test chamber is greater than or equal to the airtightness threshold, the airtightness of the test piece is qualified, that is, the test piece is a good product. If the detection result of the gas pressure in the test chamber is less than the airtightness threshold, the airtightness of the test piece is unqualified, that is, the test piece is a defective product.

[0041] S7. Subsequently, the control mechanism binds the airtightness test result (i.e., whether it is a good product) to the identification tag 85 of the corresponding tray 8. This tray 8 is the tray 8 that was in the stationary state in step S2 and originally carried the test piece.

[0042] In this embodiment, the identification device 13 includes, but is not limited to, an RFID reader / writer; the identification tag 85 includes, but is not limited to, a radio frequency identification (RFID) high-frequency tag. The identification device 13 and the identification tag 85 cooperate with the control mechanism to input the airtightness test results into the manufacturing process monitoring system, thereby binding the airtightness test results with the corresponding identification tag 85. Subsequently, staff can use the identification device to identify the identification tag 85 to obtain the product information and airtightness test results of the test piece.

[0043] The identification device 13, identification tag 85, control mechanism, and manufacturing process monitoring system are all existing technologies. A patent with publication number CN119204615B describes a manufacturing process monitoring method and system based on tracking RFID tags, detailing how to achieve traceability and tracking of product manufacturing processes and product testing results.

[0044] S8. The control mechanism first controls the pressure block 51 to rise and reset, and then drives the carrier 4 to move through the drive mechanism 7 so that the test piece placed in the receiving slot 41 is moved to the transfer mechanism 3. After that, the control mechanism controls the transfer mechanism 3 to pick up the test piece that has moved to the transfer mechanism 3 and transfer the test piece to the tray 8 that originally carried the test piece.

[0045] During steps S2 to S8, the tray 8 that originally carried the test piece remains stationary.

[0046] S9. The control mechanism uses the lifting assembly 22 to control the tray 8 carrying the test piece to reset and descend, so that the top surface of the tray 8 contacts the lifting assembly 22 and the tray 8 separates. After that, the conveying mechanism 2 conveys the tray 8 to the next station.

[0047] In some embodiments, in step S9, the conveying mechanism 2 conveys the pallet 8 to a sorting station. The identification device at the sorting station identifies the identification tag 85 to determine whether the test items on the pallet 8 are good or defective. Subsequently, the sorting equipment at the sorting station conveys the pallet 8 containing defective items to a rework station and the pallet 8 containing good items to a packaging station.

[0048] Please see Figure 1 As shown, the rack includes a lower rack 11 and an upper rack 12.

[0049] The lower frame 11 has a fixed plate 111 on its top. The conveying mechanism 2, the transfer mechanism 3, the clamping mechanism 5, and the driving mechanism 7 are all located on the top of the fixed plate 111. The identification device 13 is also located on the top of the fixed plate 111.

[0050] The upper frame 12 is mounted on top of the lower frame 11. The identification device 13, the transfer mechanism 3, the carrier 4, the clamping mechanism 5, and the drive mechanism 7 are all located inside the upper frame 12. A channel is provided on the outer wall of the upper frame 12 for the conveying mechanism 2 to pass through.

[0051] In this embodiment, the control mechanism includes a controller and a control panel. The controller is located in the lower middle part of the lower frame 11, and the control panel is embedded in the side wall of the upper frame 12. The control panel is connected to the controller. Since both the controller and the control panel are existing technologies, they will not be described in detail.

[0052] In this embodiment, the detection mechanism 6 includes a leak detector and a gas pipeline. The leak detector is mounted on the upper frame 12 and is connected to the mating groove 511 via the gas pipeline. The leak detector is connected to the control mechanism. Using a leak detector to test airtightness is existing technology and will not be described in detail.

[0053] Please see Figure 2 and Figure 3 As shown, the conveying mechanism 2 is adapted to convey the pallet 8 along a first direction. The driving mechanism 7 is adapted to drive the carrier 4 to move along the first direction. The transfer mechanism 3 is adapted to transfer the electric actuator 9 along a second direction. The first direction and the second direction are perpendicular to each other and are located in the same horizontal plane.

[0054] In this embodiment, the first direction is the front-back direction, and the second direction is the left-right direction.

[0055] Please see Figure 5 and Figure 6As shown, the conveying mechanism 2 includes a transmission belt 21, a lifting assembly 22, a limit stop 23, a first sensor 24, and a first stopper 25.

[0056] Two drive belts 21 are arranged parallel to each other and spaced apart. The conveyor frame of the drive belt 21 extends along a first direction and is mounted on the top of the fixed plate 111 via corresponding conveyor mounting blocks 26. The drive motor of the drive belt 21 is adapted to be connected to a control mechanism. The top surface of the drive belt 21 is the conveying top surface. The top surfaces of the two drive belts 21 are adapted to contact the bottom surface of the same tray 8 respectively, and drive the tray 8 to move along the first direction by friction.

[0057] The lifting assembly 22 is vertically positioned between the two transmission belts 21. The lower end of the lifting assembly 22 is a fixed end, connected to the fixed plate 111. The upper end of the lifting assembly 22 is a driving end. The driving end of the lifting assembly 22 is adapted to drive the tray 8 above it to rise and fall, so that the tray 8 contacts or separates from the top surface of the transmission belt 21.

[0058] A limiting block 23 is disposed on the top of the fixed plate 111 and located on the side of the transmission belt 21 away from the lifting assembly 22. The limiting part of the limiting block 23 is positioned above the tray 8. When the driving end of the lifting assembly 22 drives the tray 8 to separate from the top surface of the transmission belt 21, the limiting part of the limiting block 23 is adapted to abut against the tray 8 to limit the lifting stroke of the tray 8.

[0059] The first sensor 24 is disposed on the top of the fixed plate 111 and located on the side of the conveyor belt 21 away from the lifting assembly 22. The first sensor 24 is connected to the control mechanism. The first sensor 24 is adapted to detect whether the tray 8 conveyed on the conveyor belt 21 has moved to directly above the lifting assembly 22.

[0060] The first stopper 25 is positioned between the two drive belts 21 and spaced apart from the lifting assembly 22. The fixed end of the first stopper 25 is mounted on the top of the fixed plate 111. The first stopper 25 is connected to the control mechanism, and the drive end of the first stopper 25 is adapted to control the movement or stopping of the pallet 8.

[0061] In this embodiment, two drive belts 21 constitute a conveying assembly extending in a front-to-back direction. The conveying assembly is adapted to convey the tray 8 forward. A first stopper 25 is positioned in front of the lifting assembly 22. The first stopper 25 includes, but is not limited to, a pneumatic stopper. An identification device 13 is distributed on the left side of the conveying assembly, and a first sensor 24 is distributed on the right side of the conveying assembly. The first sensor 24 includes, but is not limited to, an inductive proximity sensor.

[0062] In step S1, the working principle of the conveying mechanism 2 is as follows: When the first sensor 24 detects that the tray 8 conveyed on the conveyor belt 21 has moved to directly above the lifting assembly 22, the first sensor 24 feeds back the detection result to the control mechanism; then the control mechanism controls the drive end of the first stopper 25 to move upward, so that the drive end of the first stopper 25 is positioned in front of the tray 8 and abuts against the front side wall of the tray 8, that is, the first stopper 25 stops the tray 8 (e.g., Figure 6 (As shown).

[0063] After the first stopper 25 stops the pallet 8, the control mechanism controls the drive end of the lifting assembly 22 to move upward, so that the lifting assembly 22 contacts the bottom surface of the pallet 8 and drives the pallet 8 upward until the pallet 8 abuts against the limiting part of the limiting block 23 above it. At this time, the pallet 8 separates from the top surface of the transmission belt 21, that is, the pallet 8 is in a stationary state.

[0064] Furthermore, to ensure that tray 8 can be raised and lowered smoothly, please refer to... Figure 7 and Figure 8 As shown, a positioning hole 831 is vertically provided on the tray 8, and a positioning pin 224 is provided on the top of the lifting assembly 22. The positioning pin 224 is adapted to cooperate with the positioning hole 831.

[0065] In this embodiment, please refer to Figure 6 and Figure 8 As shown, the lifting assembly 22 includes a lifting mounting plate 221, a lifting cylinder 222, a lifting abutment plate 223, and a top positioning pin 224. Specifically, the lifting mounting plate 221 is mounted on the fixed plate 111. The lifting cylinder 222 is vertically arranged. The lower end of the lifting cylinder 222 is the fixed end, connected to the lifting mounting plate 221. The upper end of the lifting cylinder 222 is the driving end, connected to the lifting abutment plate 223. The positioning pin 224 is vertically arranged on the top of the lifting abutment plate 223.

[0066] Furthermore, there are two positioning pins 224, which are located diagonally opposite the top of the lifting abutment plate 223.

[0067] Furthermore, a guide post and a guide sleeve are provided between the lifting mounting plate 221 and the lifting abutment plate 223 to ensure that the lifting abutment plate 223 is raised and lowered smoothly.

[0068] Furthermore, the upper end face of the piston rod of the lifting cylinder 222 is spherical, and the upper end of the piston rod of the lifting cylinder 222 is connected to the lifting abutment plate 223 through a lifting floating block. The piston rod end face of the cylinder is spherical, and the piston rod drives external components to rise and fall through the floating block to protect the cylinder; this is existing technology. Existing patent CN207547601U describes a floating clamping structure for a vacuum casting chamber compression cylinder, detailing the fixed spherical top column at the end of the piston rod.

[0069] Furthermore, to prevent accidental collisions between the pallet 8 located behind the lifting assembly 22 and the pallet 8 in a stationary state, the conveying mechanism 2 also includes a second sensor 27 and a second stopper 28 (e.g., Figure 6 (As shown). In this embodiment, the second sensor 27 and the second stopper 28 are spaced apart on the top of the fixed plate 111 and located between the two transmission belts 21. Both the second sensor 27 and the second stopper 28 are positioned behind the lifting assembly 22. The second sensor 27 and the second stopper 28 are respectively connected to the control mechanism. The second sensor 27 includes, but is not limited to, an inductive proximity sensor. The second stopper 28 includes, but is not limited to, a pneumatic stopper.

[0070] When the lifting assembly 22 controls the tray 8 directly above it to be in a stationary state, if the second sensor 27 detects that another tray 8 being conveyed on the conveyor belt 21 has moved to the position directly above the second sensor 27, the second sensor 27 will feed back the detection result to the control mechanism; then the control mechanism will control the second stopper 28 to stop the tray 8 (i.e., the other tray 8 located directly above the second sensor 27).

[0071] When the first stopper 25 and the lifting assembly 22 release the pallet 8 which is in a stationary state (i.e., the first stopper 25 and the lifting assembly 22 are separated from the pallet 8 which is in a stationary state), the control mechanism controls the second stopper 28 to release the pallet 8 which is stopped by the second stopper 28.

[0072] In some embodiments, the tray 8 transferred from the electrical component testing station to the airtightness testing station is in an unloaded state. To prevent the first stopper 25 and the lifting assembly 22 from stopping or lifting the unloaded tray 8, the conveying mechanism 2 also includes a first photoelectric sensor 29. The first photoelectric sensor 29 is located on the top of the fixed plate 111 and on the side of the transmission belt 21 away from the lifting assembly 22. The first photoelectric sensor 29 is connected to the control mechanism. The first photoelectric sensor 29 is used to detect whether the tray 8 transferred to the top of the lifting assembly 22 is unloaded, that is, whether the electric actuator 9 is placed in the slot 811 of the tray 8. If the tray 8 transferred to the top of the lifting assembly 22 is unloaded, the first stopper 25 and the lifting assembly 22 will not stop or lift it, and the unloaded tray 8 will be directly transferred to the subsequent station. If the tray 8, which is transferred to the top of the lifting component 22, is fully loaded (i.e., the electric actuator 9 is placed in the slot 811 of the tray 8), the control mechanism controls the airtightness testing device to perform steps S1 to S9 in sequence.

[0073] Please see Figures 5-7As shown, the tray 8 includes an upper support block 81, a support column 82, and a lower support block 83 connected sequentially from top to bottom. A slot 811 is provided on the top of the upper support block 81 to accommodate the lower housing of the electric actuator 9. When the electric actuator 9 is placed in the slot 811, the lower housing of the electric actuator 9 is exposed outside the upper support block 81. The first photoelectric sensor 29 can detect the presence or absence of the lower housing of the electric actuator 9 to determine whether the tray 8 is empty. An identification tag 85 is affixed to the top of the upper support block 81.

[0074] The upper support block 81 has a limiting block 84 at its top. One end of the limiting block 84 is connected to the upper support block 81 via a slot and bolt. The other end of the limiting block 84 extends into the slot 811 to limit the horizontal movement of the lower housing of the electric actuator 9 placed in the slot 811. The operator can adjust the position of the limiting block 84 to adapt the tray 8 to electric actuators 9 of different specifications. The lower support block 83 has a positioning hole 831 at its bottom. The positioning hole 831 is suitable for insertion into the top positioning pin 224 on the lifting abutment plate 223.

[0075] Furthermore, a weight-reducing square hole is vertically formed in the center of the lower support block 83. When the tray 8 is stopped by the second sensor 27, the driving end of the second sensor 27 is placed inside the weight-reducing square hole of the tray 8 and abuts against the rear side wall of the weight-reducing square hole (e.g., Figure 6 (As shown). The top surface of the lower support block 83 is adapted to abut against the bottom surface of the limiting part of the limiting block 23 (as shown). Figure 5 (As shown).

[0076] Please see Figure 3 and Figure 9 As shown, the transfer mechanism 3 includes a gantry 31 and a transfer device mounted on the gantry 31. The gantry 31 is located on top of the fixed plate 111. The top crossbeam of the gantry 31 extends along a second direction, located above the transfer mechanism 2 and the carrier 4, and between the transfer mechanism 2 and the carrier 4.

[0077] In this embodiment, the two columns of the gantry frame 31 are distributed on the left and right sides of the conveying mechanism 2. The top crossbeam of the gantry frame 31 extends in the left-right direction.

[0078] The transfer device includes a horizontal drive module 32, a lifting drive module 33, and a pneumatic finger 34. The fixed end of the horizontal drive module 32 is mounted on the top crossbeam of the gantry 31. The drive end of the horizontal drive module 32 is connected to the fixed end of the lifting drive module 33. The drive end of the lifting drive module 33 is connected to the fixed end of the pneumatic finger 34. The drive end of the pneumatic finger 34 is adapted to grip the electric actuator 9. The horizontal drive module 32, the lifting drive module 33, and the pneumatic finger 34 are each connected to a control mechanism.

[0079] In this embodiment, the horizontal drive module 32 is a linear drive module that extends in the left-right direction. The lifting drive module 33 is a cylinder. The upper support block 81 of the tray 8 has a notch for avoiding the gripping part of the pneumatic finger 34; the notch is adapted to expose a portion of the protruding edge of the electric actuator 9 outside the tray 8 so that the pneumatic finger 34 can grip the electric actuator 9 placed on the upper support block 81.

[0080] The gripping portion (i.e., the two grippers) of the pneumatic finger 34 has grooves that mate with the raised edge of the electric actuator 9. (See also...) Figure 5 As shown, one side edge of the electric actuator 9 has an arc-shaped notch structure, while the other side edge has a straight strip structure. When the pneumatic finger 34 is in motion, its two grippers respectively hold the arc-shaped notch structure and the straight strip structure of the electric actuator 9. Therefore, during the motion of the pneumatic finger 34, the relative position between the electric actuator 9 and the pneumatic finger 34 does not change; that is, the electric actuator 9 will not slip on the pneumatic finger 34.

[0081] In this embodiment, the drive mechanism 7 is placed below the top crossbeam of the gantry 31 and is located to the right of the conveying mechanism 2.

[0082] Please see Figure 3 and Figure 10 As shown, the drive mechanism 7 includes a drive base plate 71 and a drive device. The drive device is mounted on top of the fixed plate 111 via the drive base plate 71.

[0083] The driving device includes a drive slide rail 72, a movable slide plate 73, and a drive cylinder 75. The drive slide rail 72 is horizontally disposed on top of the drive base plate 71 and extends along a first direction. The drive slide rail 72 includes a transfer mating end and a pressing mating end disposed opposite to each other. The transfer mating end is disposed opposite to the transfer mechanism 3, and the pressing mating end is disposed opposite to the pressure block 51. The movable slide plate 73 is placed above the drive slide rail 72 and is slidably connected to the drive slide rail 72 via a drive slider. A drive cylinder 75 extending along the first direction is provided between the movable slide plate 73 and the drive base plate 71 for driving the movable slide plate 73 to move along the first direction. A first abutment block 731 is provided at the bottom of the movable slide plate 73. The first abutment block 731 is adapted to be spaced apart from the drive base plate 71 when the movable slide plate 73 is placed at the transfer mating end (e.g., ...). Figure 10 (As shown). The first abutment block 731 is also adapted to abut against the second abutment block 711 on the top of the drive base plate 71 when the movable slide plate 73 is placed at the clamping end (as shown). Figure 12 (As shown).

[0084] In this embodiment, the movable sliding plate 73 is provided with weight reduction holes.

[0085] Please see Figures 10-11As shown, the carrier 4 is detachably mounted on the top of the movable slide plate 73. A mounting flange 42 is provided on the outer side wall at the lower end of the carrier 4. A positioning pin 45 is provided between the mounting flange 42 and the movable slide plate 73. A limiting lever 74 is rotatably provided on the movable slide plate 73. The rotation axis of the limiting lever 74 is vertically arranged, and the radial extension of the limiting lever 74 is adapted to be positioned directly above the mounting flange 42 to limit the mounting flange 42 in the vertical direction. In this embodiment, two limiting levers 74 are provided on the movable slide plate 73, and the two limiting levers 74 are distributed diagonally on the top of the movable slide plate 73. The mounting flange 42 extends along a first direction.

[0086] The top of the carrier 4 has a sealing groove 43. The sealing groove 43 is arranged around the receiving groove 41. A sealing ring is embedded in the sealing groove 43 to ensure that the test chamber is effectively sealed. The top of the carrier 4 has a support protrusion 44. The support protrusion 44 is distributed between the sealing groove 43 and the receiving groove 41, and is suitable for supporting the upper edge of the lower housing of the electric actuator 9. When the electric actuator 9 is placed in the receiving groove 41, the upper housing of the electric actuator 9 is exposed outside the carrier 4.

[0087] Furthermore, the support protrusion 44 has a notch for avoiding the gripping portion of the pneumatic finger 34; this notch is adapted to expose a portion of the protruding edge of the electric actuator 9 outside the carrier 4 so that the pneumatic finger 34 can grip the electric actuator 9 placed on the carrier 4. In addition, when the pressure block 51 abuts and closes with the carrier 4, the gap between the electric actuator 9 and the notch allows the receiving groove 41 to communicate with the mating groove 511.

[0088] Furthermore, a second photoelectric sensor 76 is provided on the drive base plate 71. The second photoelectric sensor 76 is connected to the control mechanism. When the carrier 4 is placed at the transfer mating end (i.e., the movable slide plate 73 is placed at the transfer mating end), the second photoelectric sensor 76 is used to detect whether there is an electric actuator 9 in the receiving slot 41 of the carrier 4. Specifically, the second photoelectric sensor 76 can determine whether the carrier 4 is unloaded by detecting whether there is an electric actuator 9 in the upper housing.

[0089] In steps S2 to S3, the working principle of the drive mechanism 7 is as follows: When the control mechanism controls the transfer mechanism 3 to transfer the test piece into the receiving slot 41 of the carrier 4, the second photoelectric sensor 76 detects that the electric actuator 9 is placed in the receiving slot 41 of the carrier 4. The second photoelectric sensor 76 feeds back the detection result to the control mechanism; then the control mechanism controls the drive cylinder 75 to move along the first direction, so that the test piece placed in the receiving slot 41 is moved directly below the pressure block 51.

[0090] In step S8, the working principle of the drive mechanism 7 is as follows: When the drive mechanism 7 drives the carrier 4 to move to the transfer mating end, the second photoelectric sensor 76 detects that the electric actuator 9 is placed in the receiving groove 41 of the carrier 4. The second photoelectric sensor 76 feeds back the detection result to the control mechanism; then the control mechanism controls the transfer mechanism 3 to transfer the test piece placed in the receiving groove 41 to the tray 8 that originally carried the test piece.

[0091] Furthermore, buffers are provided at both ends of the drive base plate 71, extending along the first direction. The buffers are distributed at the transfer mating end and the clamping mating end, respectively. The buffers are adapted to abut against the first abutment block 731 at the bottom of the movable slide plate 73, so that the movable slide plate 73 can be parked smoothly.

[0092] Furthermore, grooves are provided on the front and rear side walls of the vehicle 4 to facilitate gripping by the staff.

[0093] Please see Figure 12 As shown, the pressing mechanism 5 includes a press and a pressing block 51. The press includes a hydraulic cylinder 53 and a movable pressing plate 54 respectively mounted on the press frame 52. The hydraulic cylinder 53 is adapted to drive the movable pressing plate 54 to move up and down. The press is prior art and will not be described in detail.

[0094] Furthermore, the lower end face of the piston rod of the hydraulic cylinder 53 is spherical, and the lower end of the piston rod of the hydraulic cylinder 53 is connected to the movable pressure plate 54 through a floating block. The piston rod end face of the hydraulic cylinder or pneumatic cylinder is spherical, and the piston rod drives external components to rise and fall through the floating block to protect the hydraulic cylinder or pneumatic cylinder; this is existing technology.

[0095] Please see Figure 13 As shown, a pull-out protrusion 512 is provided on the outer wall of the upper end of the pressure block 51. The pressure block 51 is detachably connected to the pull-out groove at the bottom of the movable pressure plate 54 via the pull-out protrusion 512. In this embodiment, the pull-out groove extends along a first direction. A knob plunger 55 is provided between the pull-out protrusion 512 and the movable pressure plate 54. The knob plunger 55 extends along a second direction. The pull-out protrusion 512 and the movable pressure plate 54 are detachably connected via the knob plunger 55. A gas pipe connector communicating with the mating groove 511 is installed on the outer wall of the lower end of the pressure block 51. The gas pipe connector is connected to the leak detector via a gas pipeline.

[0096] When the mating groove 511 and the receiving groove 41 enclose the test chamber, the inner sidewall of the mating groove 511 is adapted to be spaced apart from the electric actuator 9 placed in the test chamber to allow gas to flow.

[0097] In this embodiment, the front or rear side wall of the pressure block 51 is provided with a handle that is easy for workers to grip.

[0098] In this embodiment, a buffer is provided between the bottom plate of the press frame 52 and the movable pressure plate 54, and the buffer is set vertically.

[0099] In this embodiment, the end of the drive base plate 71 near the press frame 52 is placed above the base plate of the press frame 52, and is connected to the fixing plate 111 through the base plate of the press frame 52.

[0100] This embodiment achieves automated testing of the airtightness of electric actuators through the cooperation of a conveying mechanism, a transfer mechanism, a carrier, a clamping mechanism, and a testing mechanism. It is simple to operate, enables automated testing, greatly improves work efficiency, and reduces labor costs. The cooperation between the lifting assembly and the first stop device allows for the stopping or releasing of the pallet. Quick-change mechanisms between the carrier and the movable slide plate, and between the pressure block and the movable pressure plate, allow operators to change different carriers and pressure blocks to adapt to different models of electric actuators. The cooperation between the first and second abutment blocks effectively protects the carrier and extends its service life.

[0101] Example 2 The difference between this embodiment and embodiment 1 is that there are two clamping mechanisms 5 in this embodiment.

[0102] Please see Figure 14 As shown, there are two lifting components 22 in the conveying mechanism 2. The two lifting components 22 are distributed at intervals along the first direction. Correspondingly, there are two identification devices 13, two first sensors 24, and two first stoppers 25, each corresponding to one of the lifting components 22.

[0103] There are two transfer devices in the transfer mechanism 3, symmetrically arranged on both sides of the gantry 31. Each transfer device in the transfer mechanism 3 corresponds to a lifting assembly 22.

[0104] The drive mechanism 7 has two drive units, spaced apart along the first direction. The two drive units are mounted on the same drive base plate 71. There are two second photoelectric sensors 76, each corresponding to one of the drive units. Each drive unit of the drive mechanism 7 has a corresponding carrier 4. The carrier 4 corresponds one-to-one with the transfer device of the transfer mechanism 3.

[0105] Two clamping mechanisms 5 are spaced apart along a first direction. In this embodiment, the two clamping mechanisms 5 are respectively located at the front and rear ends of the drive base plate 71. The front and rear ends of the drive base plate 71 are respectively connected to the fixed plate 111 through the base plate of the corresponding press frame 52. A support block is provided between the middle section of the drive base plate 71 and the fixed plate 111. The clamping mechanisms 5 correspond one-to-one with the carrier 4.

[0106] In this embodiment, the two lifting components 22 are a first lifting component and a second lifting component, with the first lifting component positioned in front of the second lifting component. When the device is in operation, the control mechanism prioritizes controlling the first lifting component and the corresponding first stop device 25 to perform stop and lifting operations. When the first lifting component is in the lifting state, i.e., when a tray 8 is positioned above the first lifting component, the control mechanism then controls the second lifting component and the corresponding first stop device 25 to stop and lift subsequent trays 8 (i.e., the tray 8 located behind the first lifting component).

[0107] The airtightness testing device in this embodiment can test two electric actuators, saving space and improving work efficiency.

[0108] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An airtightness testing device for an electric actuator, characterized in that, It includes a conveying mechanism (2), a transfer mechanism (3), a carrier (4) and a pressing mechanism (5) respectively installed on the top of the lower frame (11); The conveying mechanism (2) carries the electric actuator (9) on the pallet (8); the conveying mechanism (2) is provided with a lifting assembly (22) located below the pallet (8), which is suitable for controlling the pallet (8) to move or stay; The transfer mechanism (3) is positioned above the conveying mechanism (2) and is adapted to transfer the electric actuator (9) on the pallet (8) to the receiving slot (41) on the top of the carrier (4) when the pallet (8) is in a stationary state. The carrier (4) is connected to the lower frame (11) via a drive mechanism (7); the drive mechanism (7) is adapted to transport the carrier (4) to the pressing mechanism (5) and / or the transfer mechanism (3). The pressing mechanism (5) is provided with a pressing block (51) that can be raised and lowered; the pressing block (51) is placed above the carrier (4); the bottom of the pressing block (51) is provided with a mating groove (511), and the mating groove (511) is connected to the detection mechanism (6) installed on the lower frame (11) through a gas pipeline; The control mechanism provided on the lower frame (11) is adapted to control the detection mechanism (6) to perform an airtightness test on the electric actuator (9) placed in the test cavity when the mating groove (511) and the receiving groove (41) enclose the test cavity.

2. The airtightness testing device according to claim 1, characterized in that, The vehicle (4) is detachably mounted on top of the movable slide plate (73) of the drive mechanism (7); The lower end of the carrier (4) is provided with a mounting flange (42); a positioning pin (45) is provided between the mounting flange (42) and the movable slide plate (73). The movable slide (73) is rotatably provided with a limiting lever (74); the rotation axis of the limiting lever (74) is vertically arranged, and the radial extension of the limiting lever (74) is adapted to be placed directly above the mounting flange (42) to limit the mounting flange (42) in the vertical direction; The top of the carrier (4) is provided with a sealing groove (43); the sealing groove (43) is arranged around the outside of the receiving groove (41), and a sealing ring is embedded in the sealing groove (43); The top of the carrier (4) is provided with a support protrusion (44); the support protrusion (44) is distributed between the sealing groove (43) and the receiving groove (41), and is suitable for supporting the upper edge of the lower housing of the electric actuator (9).

3. The airtightness testing device according to claim 1, characterized in that, The drive mechanism (7) includes a drive base plate (71), a drive slide rail (72), and a movable slide plate (73). The drive base plate (71) is mounted on the lower frame (11); The drive slide rail (72) is horizontally disposed on the top of the drive base plate (71) and extends along the first direction; the drive slide rail (72) includes a transfer mating end and a pressing mating end disposed opposite to each other; the transfer mating end is disposed opposite to the transfer mechanism (3), and the pressing mating end is disposed opposite to the pressing block (51); The movable slide plate (73) is placed above the drive slide rail (72) and is slidably connected to the drive slide rail (72) via a drive slider; a drive cylinder (75) extending in a first direction is provided between the movable slide plate (73) and the drive base plate (71). The bottom of the movable slide plate (73) is provided with a first abutting block (731); the first abutting block (731) is adapted to be spaced apart from the drive base plate (71) when the movable slide plate (73) is placed at the transfer mating end; the first abutting block (731) is also adapted to abut against the second abutting block (711) on the top of the drive base plate (71) when the movable slide plate (73) is placed at the pressing mating end; The drive base plate (71) is also provided with a second photoelectric sensor (76) connected to the control mechanism, which is adapted to detect whether there is an electric actuator (9) in the receiving groove (41) when the movable slide plate (73) is placed at the transfer mating end.

4. The airtightness testing device according to claim 1, characterized in that, The pressing mechanism (5) includes a press and the pressing block (51); The press includes a hydraulic cylinder (53) and a movable pressure plate (54) respectively mounted on the press frame (52); the hydraulic cylinder (53) is adapted to drive the movable pressure plate (54) to move up and down; The outer side wall at the upper end of the pressure block (51) is provided with a pull-out protrusion (512), and the pressure block (51) is detachably connected to the pull-out groove at the bottom of the movable pressure plate (54) through the pull-out protrusion (512). A knob plunger (55) is provided between the pull-out protrusion (512) and the movable pressure plate (54). An air pipe connector connected to the mating groove (511) is installed on the outer side wall at the lower end of the pressure block (51). The air pipe connector is connected to the detection mechanism (6) through a gas pipeline. The inner wall of the mating groove (511) is adapted to be spaced apart from the electric actuator (9) placed in the test cavity when the mating groove (511) and the receiving groove (41) enclose the test cavity to allow gas to flow.

5. The airtightness testing device according to claim 1, characterized in that, The transmission mechanism (2) includes a transmission belt (21), the lifting assembly (22), and a limiting block (23). There are two transmission belts (21), which are parallel and spaced apart; the transmission frame of the transmission belt (21) is installed on the lower frame (11) through the corresponding transmission mounting block (26); the transmission belt (21) is adapted to convey the tray (8) placed on the top surface of the two transmission belts (21) in the horizontal direction. The lifting assembly (22) is vertically arranged and placed between the two transmission belts (21); the lower end of the lifting assembly (22) is a fixed end, which is connected to the lower frame (11); the upper end of the lifting assembly (22) is a driving end, which is suitable for driving the tray (8) to contact or separate from the top surface of the transmission belt (21); The limiting block (23) is disposed on the top of the lower frame (11) and located on the side of the transmission belt (21) away from the lifting assembly (22); the limiting part of the limiting block (23) is placed above the tray (8) and is adapted to abut against the tray (8) when the tray (8) is separated from the top surface of the transmission belt (21); The control mechanism is adapted to control the transfer mechanism (3) to transfer the electric actuator (9) on the pallet (8) into the receiving slot (41) when the pallet (8) is separated from the top surface of the drive belt (21).

6. The airtightness testing device according to claim 5, characterized in that, The conveying mechanism (2) also includes a first sensor (24) and a first stopper (25); The first sensor (24) is located on the top of the lower frame (11) and on the side of the conveyor belt (21) away from the lifting assembly (22); the first sensor (24) is connected to the control mechanism and is adapted to detect whether the tray (8) conveyed on the conveyor belt (21) has flowed to the top of the lifting assembly (22); The first stopper (25) is placed between the two drive belts (21); the fixed end of the first stopper (25) is installed on the top of the lower frame (11); The first stopper (25) is connected to the control mechanism and is adapted to control the pallet (8) to move or stay; The control mechanism is adapted to first drive the drive end of the first stopper (25) to stop the pallet (8) located directly above the lifting assembly (22) when the pallet (8) flows to the top of the lifting assembly (22), and then control the lifting assembly (22) to drive the pallet (8) to separate from the top surface of the transmission belt (21).

7. The airtightness testing device according to claim 1, characterized in that, The tray (8) includes an upper support block (81), a support column (82), and a lower support block (83) connected from top to bottom. The top of the upper support block (81) is provided with a slot (811) for accommodating the lower housing of the electric actuator (9); The top of the upper support block (81) is provided with a limiting block (84); one end of the limiting block (84) is connected to the upper support block (81) through a waist-shaped hole; the other end of the limiting block (84) extends into the slot (811) to limit the electric actuator (9) placed in the slot (811) in the horizontal direction. The lower support block (83) is vertically provided with a positioning hole (831), which is adapted to cooperate with the drive end of the lifting assembly (22).

8. The airtightness testing device according to claim 1, characterized in that, The transfer mechanism (3) includes a gantry (31), a horizontal drive module (32), a lifting drive module (33), and pneumatic fingers (34). The gantry (31) is located on top of the lower frame (11); the top beam of the gantry (31) is located above the conveying mechanism (2) and the carrier (4), and is located between the conveying mechanism (2) and the carrier (4); The fixed end of the horizontal drive module (32) is installed on the top crossbeam of the gantry (31). The drive end of the horizontal drive module (32) is connected to the fixed end of the lifting drive module (33). The drive end of the lifting drive module (33) is connected to the fixed end of the pneumatic finger (34). The drive end of the pneumatic finger (34) is adapted to grip the electric actuator (9).

9. The airtightness testing device according to claim 1, characterized in that, The conveying mechanism (2) is adapted to convey the tray (8) along a first direction; The drive mechanism (7) is adapted to drive the vehicle (4) to move along the first direction; The transfer mechanism (3) is adapted to transfer the electric actuator (9) in the second direction; The first direction and the second direction are perpendicular to each other and lie in the same horizontal plane; The lifting components (22) in the conveying mechanism (2) are two, and are spaced apart along the first direction; The transfer mechanism (3) has two transfer devices, which are symmetrically arranged on both sides of the transfer mechanism (3); the transfer devices of the transfer mechanism (3) correspond one-to-one with the lifting assembly (22); The driving mechanism (7) has two driving devices, which are spaced apart along the first direction; each driving device of the driving mechanism (7) is provided with a corresponding carrier (4); the carrier (4) corresponds one-to-one with the transfer device of the transfer mechanism (3); There are two clamping mechanisms (5), which are distributed at intervals along the first direction and are respectively located at both ends of the driving mechanism (7); the clamping mechanism (5) corresponds to the carrier (4) one by one.

10. The airtightness testing device according to claim 1, characterized in that, The control mechanism is located in the lower middle part of the lower frame (11); The upper frame (12) is covered by the top edge of the lower frame (11); the transfer mechanism (3), the carrier (4), the clamping mechanism (5) and the driving mechanism (7) are all distributed in the inner cavity of the upper frame (12); a channel for the conveying mechanism (2) to pass through is opened on the outer side wall of the upper frame (12); The detection mechanism (6) includes a leak detector installed on the upper frame (12) and a gas pipeline connected to the leak detector.

Images