New energy automobile range extender camshaft oil duct air tightness detection device

Abstract

The invention relates to a new energy automobile range extender camshaft oil duct airtightness detection device, which comprises a machine body, a detection mechanism, a detection pipe, a manipulator, a placement plate, a rotating disc, an arc-shaped plate and a movable pipe, and is characterized in that one end of the placement plate is rotatably connected with the movable pipe, and the other end is fixedly connected with a pressing rod; the abutting rod is in abutting fit with the edge of the rotating disc and the circular ring at the same time. The end portion of the movable pipe is fixedly connected with an abutting plate, a notch is formed in the abutting plate, the rotating placing plate enables the cam shaft to enter the abutting plate through the notch, and meanwhile the end portion of the cam shaft is positioned, corrected and detected in cooperation with the effect of a circular ring. Through cooperation of the rotating disc, the circular ring and the abutting rod, the placing plate drives the camshaft to synchronously perform angle and position adjustment in the process of entering the abutting disc, end face centering and sealing self-adaption are realized, and the detection success rate is improved; the abutting plates on the two sides act cooperatively, sealing butt joint of the two ends of the cam shaft is completed at the same time, and integrity and accuracy of oil duct airtightness detection are ensured.

Description

Technical Field

[0001] This invention relates to the field of testing technology for new energy vehicle components, specifically a device for testing the airtightness of the oil passage of a camshaft in a new energy vehicle range extender. Background Technology

[0002] The sealing performance of the camshaft oil passages in new energy vehicle range extenders directly affects the reliability and lifespan of the engine lubrication system; therefore, rigorous airtightness testing is required before shipment. Currently, most automated airtightness testing devices for camshaft oil passages use fixed sealing heads in conjunction with linear pushing mechanisms to achieve shaft end docking and sealing. However, such devices struggle to dynamically correct the camshaft's posture and adaptively align it during testing. Especially when machining errors or loading position deviations cause misalignment between the camshaft end face and the sealing head, problems such as incomplete sealing, testing failure, or workpiece scratches can easily occur. Existing technologies largely rely on high-precision positioning mechanisms or manual intervention, resulting in low testing efficiency and poor adaptability, failing to meet the testing requirements of high-volume, high-rate-of-production of new energy vehicle components.

[0003] Therefore, a device for testing the air tightness of the oil passage of the camshaft in a range extender for new energy vehicles is proposed to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a device for testing the air tightness of the oil passage of the camshaft in a range extender for new energy vehicles.

[0005] The objective of this invention is achieved through the following technical solution: a device for testing the air tightness of the oil passage of a camshaft in a range extender for new energy vehicles, comprising a body with a testing mechanism inside, a testing tube connected to the testing mechanism, a robotic arm inside the body, and a placement plate for placing the camshaft in cooperation with the robotic arm, a rotating disk rotatably connected inside the body, an arc-shaped plate fixedly connected to the edge of the rotating disk, a circular ring fixedly connected to the side of the rotating disk, and an inclined groove opened on the upper side of the circular ring;

[0006] The end of the detection tube is fixedly connected to a movable tube. One end of the placement plate is rotatably connected to the movable tube, and the other end is fixedly connected to a pressing rod. The pressing rod simultaneously presses against the edge of the rotating disk and the circular ring.

[0007] A pressure plate is fixedly connected to the end of the movable tube. The pressure plate has a slot. The rotating placement plate pushes the camshaft through the slot into the pressure plate. At the same time, the circular ring helps to position, correct and inspect the end of the camshaft.

[0008] As a further description of the above technical solution:

[0009] An arc-shaped limiting plate is fixedly connected to the placement plate, and clearance grooves are provided on both sides of the placement plate. The clearance grooves cooperate with the robotic arm to facilitate picking.

[0010] As a further description of the above technical solution:

[0011] A first fixed plate is fixedly connected inside the machine body, and a movable tube movably passes through the first fixed plate. A compression spring is connected between the movable tube and the first fixed plate to improve the sealing fit and fault tolerance.

[0012] As a further description of the above technical solution:

[0013] A second fixed plate is fixedly connected inside the machine body. A limit groove is opened on the second fixed plate. The pressing rod has a U-shaped structure and passes through the limit groove. An elastic pull rope is hung between the pressing rod and the top of the limit groove to realize precise control of the movement of the placement plate and automatic reset.

[0014] As a further description of the above technical solution:

[0015] A motor is fixedly connected to the machine body. The output shaft of the motor is fixedly connected to the central shaft of the rotating disk. A rotating rod is fixedly connected to the central shaft on the other side of the rotating disk. The rotating rod is fixedly connected to the central shaft of another pressure plate, thereby improving detection efficiency and consistency.

[0016] As a further description of the above technical solution:

[0017] The inner side of the pressure plate is provided with a frustum-shaped pressure groove, which enhances the centering through conical guidance and achieves more precise end face sealing.

[0018] As a further description of the above technical solution:

[0019] A pressure plate is fixedly connected to the first fixing plate and the second fixing plate. The pressure plate is positioned corresponding to the pressure plate and is used to press against the camshaft entering the pressure plate to ensure stable sealing and accurate detection.

[0020] As a further description of the above technical solution:

[0021] Multiple pressure beads are fixedly connected to the circular ring. The pressure beads slide in conjunction with the pressure rod to enhance the correction effect and adaptability.

[0022] As a further description of the above technical solution:

[0023] The height of the arc-shaped limiting plate closer to the moving tube is greater than the height of the arc-shaped limiting plate farther away from the moving tube.

[0024] Compared with the prior art, the advantages of the present invention are as follows:

[0025] In this application, when the placement plate moves the camshaft upward, the placement plate moves the camshaft to the right, so that the camshaft enters a pressing plate whose horizontal position remains unchanged. The horizontal movement distance of the other pressing plate is greater than the horizontal movement distance of the camshaft on the placement plate, so that the other pressing plate presses against the other end of the camshaft, thereby completing the fixed clamping of the camshaft.

[0026] The cooperation of the rotating disk, circular ring, and pressure rod enables the placement plate to drive the camshaft to adjust its angle and position synchronously as it enters the pressure disk, achieving end face alignment and sealing self-adaptation, thus improving the success rate of the test. The two pressure disks work together to simultaneously complete the sealing connection at both ends of the camshaft, ensuring the integrity and accuracy of the oil passage airtightness test. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the cooperation structure between the robotic arm and the placement plate of the present invention;

[0030] Figure 4 This is a schematic diagram of the cooperation structure between the placement plate and the two pressure plates of the present invention;

[0031] Figure 5 This is a schematic diagram of the cooperation structure between the pressure plate and the pressure disc of the present invention;

[0032] Figure 6 This is the present invention. Figure 5 A front view of the central structure;

[0033] Figure 7 This is a schematic diagram of the cooperation structure between the pressure plate and the rotating plate of the present invention;

[0034] Figure 8 This is a schematic diagram of the disassembled structure of the pressure bar and the second fixing plate of the present invention;

[0035] Figure 9 This is a schematic diagram of the cooperative structure of the rotating disk, the arc plate, and the circular ring of the present invention;

[0036] Figure 10 This is a schematic diagram showing the disassembled structure of the pressure plate and the movable tube of the present invention.

[0037] Labeling Explanation: 1. Machine body; 2. Detection tube; 3. Robotic arm; 4. Placement plate; 5. Rotating disk; 6. Arc-shaped plate; 7. Circular ring; 8. Inclined groove; 9. Movable tube; 10. Pressing rod; 11. Pressing plate; 12. Groove; 13. Arc-shaped limiting plate; 14. Clearance groove; 15. First fixing plate; 16. Compression spring; 17. Second fixing plate; 18. Elastic pull rope; 19. Motor; 20. Rotating rod; 21. Pressing groove; 22. Pressing plate; 23. Pressing bead. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0039] like Figures 1-10 The diagram shows an embodiment of a new energy vehicle range extender camshaft oil passage air tightness testing device provided by the present invention. It includes a body 1 with a testing mechanism (a conventional mechanism in the art) inside, a testing tube 2 connected to the testing mechanism, a robot arm 3 inside the body 1, and a placement plate 4 for placing the camshaft in cooperation with the robot arm 3. A rotating disk 5 (elliptical) is rotatably connected inside the body 1. An arc plate 6 is fixedly connected to the edge of the rotating disk 5. A circular ring 7 is fixedly connected to the side of the rotating disk 5. An inclined groove 8 is opened on the upper side of the circular ring 7.

[0040] The end of the detection tube 2 is fixedly connected to the movable tube 9. One end of the placement plate 4 is rotatably connected to the movable tube 9, and the other end is fixedly connected to the pressing rod 10. The pressing rod 10 simultaneously presses against the edge of the rotating disk 5 and the circular ring 7.

[0041] The end of the movable tube 9 is fixedly connected to a pressure plate 11 (a through hole in the middle of the low-pressure plate, and a sealing layer on the inner wall of the through hole, which facilitates a sealed connection with the end of the camshaft, so that the camshaft oil passage can be connected to the detection tube 2, and the gas will not leak out during the detection). The pressure plate 11 has a slot 12. The rotating placement plate 4 pushes the camshaft through the slot 12 into the pressure plate 11. At the same time, with the help of the circular ring 7, the end of the camshaft is positioned, corrected and detected.

[0042] An arc-shaped limiting plate 13 is fixedly connected to the placement plate 4, and clearance grooves 14 are provided on both sides of the placement plate 4. The clearance grooves 14 cooperate with the robotic arm 3.

[0043] The arc-shaped limiting plate 13 restricts the radial movement of the camshaft, and the clearance groove 14 provides operating space for the robot arm 3, ensuring that the camshaft is stably positioned on the placement plate 4, avoiding motion interference between the robot arm 3 and the placement plate 4, and improving the feeding accuracy and safety.

[0044] A first fixed plate 15 is fixedly connected inside the body 1, and a movable tube 9 is movably passed through the first fixed plate 15. A compression spring 16 is connected between the movable tube 9 and the first fixed plate 15. The movable tube 9 is elastically connected to the first fixed plate 15 through the compression spring 16, so that the pressure plate 11 has axial floating ability, allowing the pressure plate 11 to adapt to the change of the camshaft end face position during docking.

[0045] A second fixing plate 17 is fixedly connected inside the body 1. A limiting groove is opened on the second fixing plate 17. The pressing rod 10 has a U-shaped structure and passes through the limiting groove. An elastic pull rope 18 is hung between the pressing rod 10 and the top of the limiting groove. The U-shaped pressing rod 10 passes through the limiting groove of the second fixing plate 17 and is provided with a restoring force by the elastic pull rope 18 to maintain contact with the circular ring 7. This ensures that the pressing rod 10 always moves with the circular ring 7.

[0046] A motor 19 is fixedly connected to the body 1. The output shaft of the motor 19 is fixedly connected to the central shaft of the rotating disk 5. A rotating rod 20 is fixedly connected to the central shaft of the other side of the rotating disk 5. The rotating rod 20 is fixedly connected to the central shaft of another pressure plate 11, so as to realize the coordinated drive of the two pressure plates 11 and ensure that the two ends of the camshaft enter the sealing position synchronously.

[0047] The inner side of the pressure plate 11 is provided with a frustum-shaped pressure groove 21; the frustum-shaped pressure groove 21 on the inner side of the pressure plate 11 cooperates with the tapered surface at the end of the camshaft, and the centering is enhanced by the tapered surface guidance, so as to achieve a more precise end face seal.

[0048] A pressure plate 22 is fixedly connected to the first fixing plate 15 and the second fixing plate 17. The pressure plate 22 corresponds to the position of the pressure plate 11 and is used to press the camshaft that enters the pressure plate 11.

[0049] Multiple pressure beads 23 are fixedly connected to the circular ring 7. The pressure beads 23 slide in cooperation with the pressure rod 10. The pressure beads 23 on the circular ring 7 slide in cooperation with the pressure rod 10, generating a slight shaking. The micro-vibration assists the camshaft to further adjust its posture when entering the pressure plate 11.

[0050] The height of the arc-shaped limiting plate 13 closer to the moving tube 9 is greater than the height of the arc-shaped limiting plate 13 farther away from the moving tube 9.

[0051] Working principle: First, the camshaft is clamped by the robotic arm 3 (the machine body 1 is sealed to ensure the accuracy of the detection, and there is no need to open the door of the machine body 1 for manual operation), so that the camshaft is placed on the placement plate 4. The placement plate 4 is provided with a relief groove 14 to facilitate the operation of the robotic arm 3 and avoid the movement interference between the robotic arm 3 and the placement plate 4.

[0052] It is worth noting that: under the action of the elastic pull rope 18 and the compression spring 16, the pressure bar 10 always adheres to the circular ring 7 and the arc plate 6;

[0053] Then, start the motor 19. The motor 19 drives the rotating disk 5 to rotate in its original position. The arc plate 6 and the circular ring 7 make circular motion. When the arc plate 6 moves away from the pressure rod 10 and the middle of the circular ring 7 acts on the pressure rod 10, the placement plate 4 (the end near the motor 19) rotates upward and moves horizontally to the left towards the direction of the motor 19. This drives the cam shaft on the placement plate 4 to move upward through the slot 12 into the pressure plate 11 and into the pressure plate 11, thereby completing the positioning of the end of the cam shaft.

[0054] Simultaneously rotating the placement plate 4 causes the other end of the camshaft to enter the pressure plate 11 near the movable tube 9. At this time, the pressure plate 11 near the movable tube 9 moves towards the other end of the camshaft.

[0055] When the placement plate 4 moves the camshaft upward, the placement plate 4 moves the camshaft to the right, so that the camshaft enters the pressure plate 11 (the right pressure plate 11, i.e. the pressure plate 11 near the motor 19) which remains in a horizontal position. The horizontal movement distance of the left pressure plate 11 is greater than the horizontal movement distance of the camshaft on the placement plate 4 (the placement plate 4 rotates and tilts, the camshaft is located in the middle of the placement plate 4, and the horizontal movement distance of the camshaft is less than the horizontal movement distance of the end of the placement plate 4 near the movable tube 9). This causes the left pressure plate 11 to press against the other end of the camshaft, thereby completing the fixed clamping of the camshaft.

[0056] The position of the camshaft is limited by the setting of the pressure plate 22, which facilitates the correction of the camshaft;

[0057] It is worth noting that the pressure plate 11 near the motor 19 rotates, and in conjunction with the frustum-shaped pressure groove 21, it further corrects the camshaft, and the groove 12 rotates to switch positions.

[0058] Furthermore, due to the action of the pressure ball 23 and the pressure rod 10, the placement plate 4 and the pressure plate 11 on the left side tilt and sway, which further helps the camshaft to be corrected.

[0059] Finally, gas is released through the testing mechanism, testing tube 2 and movable tube 9, and the pressure plate 11 fixed to the movable tube 9 to conduct an airtightness test.

[0060] After the test is completed, continue to rotate the motor 19 to disengage the camshaft from the pressure plate 11 and place it on the placement plate 4, where it is then removed by another robotic arm 3.

Claims

1. A device for testing the airtightness of the oil passage of a camshaft in a range extender for new energy vehicles, comprising: The machine body (1) is equipped with a detection mechanism, and the detection mechanism is connected to a detection tube (2). The machine body (1) is equipped with a robot arm (3). The machine body (1) is characterized by further including a placement plate (4) for placing a camshaft in cooperation with the robot arm (3). A rotating disk (5) is rotatably connected inside the machine body (1). An arc plate (6) is fixedly connected to the edge of the rotating disk (5). A circular ring (7) is fixedly connected to the side of the rotating disk (5). An inclined groove (8) is opened on the upper side of the circular ring (7). The end of the detection tube (2) is fixedly connected to the movable tube (9). One end of the placement plate (4) is rotatably connected to the movable tube (9), and the other end is fixedly connected to the pressing rod (10). The pressing rod (10) simultaneously presses against the edge of the rotating disk (5) and the circular ring (7). The end of the movable tube (9) is fixedly connected to a pressure plate (11), and a slot (12) is opened on the pressure plate (11). The rotating placement plate (4) puts the camshaft into the pressure plate (11) through the slot (12). At the same time, with the help of the circular ring (7), the end of the camshaft is positioned, corrected and tested.

2. The airtightness testing device for the camshaft oil passage of a new energy vehicle range extender according to claim 1, characterized in that: An arc-shaped limiting plate (13) is fixedly connected to the placement plate (4), and clearance grooves (14) are provided on both sides of the placement plate (4). The clearance grooves (14) cooperate with the robot arm (3).

3. The airtightness testing device for the camshaft oil passage of a new energy vehicle range extender according to claim 1, characterized in that: The body (1) is fixedly connected to a first fixed plate (15), and a movable tube (9) is movably passed through the first fixed plate (15). A compression spring (16) is connected between the movable tube (9) and the first fixed plate (15).

4. The airtightness testing device for the camshaft oil passage of a new energy vehicle range extender according to claim 3, characterized in that: The body (1) is fixedly connected to a second fixing plate (17). A limiting groove is opened on the second fixing plate (17). The pressing rod (10) has a U-shaped structure. The pressing rod (10) passes through the limiting groove. An elastic pull rope (18) is hung between the pressing rod (10) and the top of the limiting groove.

5. The airtightness testing device for the camshaft oil passage of a new energy vehicle range extender according to claim 1, characterized in that: A motor (19) is fixedly connected to the body (1). The output shaft of the motor (19) is fixedly connected to the central shaft of the rotating disk (5). A rotating rod (20) is fixedly connected to the central shaft on the other side of the rotating disk (5). The rotating rod (20) is fixedly connected to the central shaft of another pressing disk (11).

6. The airtightness testing device for the camshaft oil passage of a new energy vehicle range extender according to claim 1, characterized in that: The inner side of the pressure plate (11) is provided with a pressure groove (21) in the shape of a frustum.

7. The airtightness testing device for the camshaft oil passage of a new energy vehicle range extender according to claim 4, characterized in that: A pressure plate (22) is fixedly connected to the first fixing plate (15) and the second fixing plate (17). The pressure plate (22) corresponds to the position of the pressure plate (11) and is used to press the camshaft that enters the pressure plate (11).

8. The airtightness testing device for the camshaft oil passage of a new energy vehicle range extender according to claim 1, characterized in that: Multiple pressure beads (23) are fixedly connected to the circular ring (7), and the pressure beads (23) slide with the pressure rod (10).

9. The airtightness testing device for the camshaft oil passage of a new energy vehicle range extender according to claim 1, characterized in that: The height of the arc-shaped limiting plate (13) near the active tube (9) is greater than the height of the arc-shaped limiting plate (13) far away from the active tube (9).

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