Metal plate welding spot detection device of electric automobile

Abstract

The invention discloses a sheet metal welding spot detection device for an electric vehicle, and the device comprises a placement detection frame, the bottom end of the placement detection frame is provided with four moving wheels which are arranged in a rectangular array, the top end of the placement detection frame is provided with a fixedly connected suction cup, and the bottom end of the suction cup is provided with a fixedly connected connection hard pipe. A detection mechanical arm is installed on one side of the placement detection frame, a multi-station detection mechanism is arranged between the placement detection frame and the detection mechanical arm, the multi-station detection mechanism comprises a fixed seat arranged between the placement detection frame and the detection mechanical arm, and starting of a servo motor is controlled through displacement drive; according to the invention, synchronous movement of the two connected placement detection frames by the connecting seat is realized, another pre-fixed electric automobile sheet metal part can be moved to the bottom end of the detection mechanical arm, and the moved electric automobile sheet metal part after welding spot detection can be rapidly taken out, placed and fixed. The efficiency of the welding spot detection device for detecting the surface welding spots of the sheet metal part of the electric vehicle is improved.

Description

Technical Field

[0001] This invention relates to the field of weld joint inspection technology, specifically a sheet metal weld joint inspection device for electric vehicles. Background Technology

[0002] The sheet metal weld inspection device for electric vehicles is a core piece of equipment to ensure the safety of the vehicle body structure, the compliance of welding quality, and the consistency of production. Its core function is to identify weld defects, verify the effectiveness of welding processes, and prevent safety risks. Compared with human eye inspection, the sheet metal weld inspection device for electric vehicles can reduce the error during inspection and is more accurate and less prone to errors than manual inspection.

[0003] The aforementioned sheet metal weld point inspection device for electric vehicles typically uses a single workstation for weld point inspection during processing. After inspection, the machine needs to be stopped to place and install the electric vehicle sheet metal parts. This process is not only cumbersome but also time-consuming due to the downtime, resulting in low efficiency when inspecting weld points on electric vehicle sheet metal parts. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sheet metal weld point detection device for electric vehicles.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] Compared with existing technologies, this sheet metal weld point inspection device for electric vehicles has the following advantages: 1. In use, the present invention uses the shift drive to control the start of the servo motor, so that the connecting seat moves synchronously to the two connected placement and testing frames. This allows another pre-fixed electric vehicle sheet metal part to be moved to the bottom of the testing robot arm. The electric vehicle sheet metal part that has been displaced and tested for weld points can be quickly removed and repositioned, thus improving the efficiency of the weld point testing device in testing the surface weld points of electric vehicle sheet metal parts.

[0007] Second, when using this invention, as the testing frame is placed and the work position is adjusted, the fixed rod slides along the inclined groove, driving the moving plate to move upward. Then, the lifting rod assists in lifting and pushing out the electric vehicle sheet metal parts from the bottom, which facilitates the removal of the electric vehicle sheet metal parts, improves the convenience of removal, and speeds up the efficiency of surface weld point detection of electric vehicle sheet metal parts through the weld point detection device.

[0008] Third, this invention pushes the test frame on one side of the fixed base, allowing the limiting block to rotate around the fixed axis and engage in the locking groove, thus achieving rapid positioning and docking between the fixed base and the test frame. By pushing the pull rod, the guide plate and push plate move, and the push plate pushes the limiting block out of the locking groove, achieving rapid disassembly and separation. This improves the rapid assembly efficiency of the weld point detection device and facilitates timely surface weld point detection of electric vehicle sheet metal parts after assembly.

[0009] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from an examination of the following, or may be learned from the practice of the invention. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the fixing base of the present invention; Figure 3 This is a three-dimensional cross-sectional view of the reinforced box of the present invention; Figure 4 This is a three-dimensional cross-sectional view of the sealing seat of the present invention; Figure 5 This is a three-dimensional structural diagram of the movable plate of the present invention; Figure 6 This is a three-dimensional structural diagram of the limiting circular block of the present invention; Figure 7 This is a three-dimensional cross-sectional view of the fixing and locking seat of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram of point A in the middle.

[0011] In the diagram: 1. Testing frame; 2. Casters; 3. Suction cup; 4. Connecting rigid pipe; 5. Testing robotic arm; 6. Multi-station testing mechanism; 601. Fixed base; 602. Reinforcement box; 603. Shift drive control servo motor; 604. Lead screw; 605. Synchronous pulley; 606. Displacement threaded seat; 607. Connecting seat; 608. Limiting ring; 609. Sealing seat; 610. Sealing valve core; 611. Rotating shaft; 612. Angular rotation gear; 613. 614. Torsion spring; 615. Protective frame; 616. Fixed toothed plate; 7. Lifting anti-suction mechanism; 701. Moving plate; 702. Inclined groove; 703. Guide rod; 704. Lifting rod; 705. Limiting spring; 706. Fixed rod; 8. Quick positioning mechanism; 801. Fixed shaft; 802. Limiting block; 803. Fixed locking seat; 804. Locking groove; 805. Pull rod; 806. Guide plate; 807. Stabilizing rod; 808. Push plate; 809. Return spring. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] like Figures 1-8 As shown, the present invention provides a technical solution: a sheet metal weld joint inspection device for electric vehicles, including a placement inspection frame 1, four movable wheels 2 arranged in a rectangular array at the bottom of the placement inspection frame 1, a suction cup 3 fixedly connected to the top of the placement inspection frame 1, a connecting rigid tube 4 fixedly connected to the bottom of the suction cup 3, an inspection robotic arm 5 installed on one side of the placement inspection frame 1, a multi-station inspection mechanism 6 provided between the placement inspection frame 1 and the inspection robotic arm 5, the multi-station inspection mechanism 6 including a fixed seat 601 provided between the placement inspection frame 1 and the inspection robotic arm 5, a reinforcement box 602 fixedly connected to one end of the fixed seat 601, a shift drive control servo motor 603 installed on one side of the reinforcement box 602, a lead screw 604 connected by a bearing inside the fixed seat 601, a synchronous pulley 605 provided between the lead screw 604 and the drive rod connected to the output end of the shift drive control servo motor 603, a lifting and anti-suction mechanism 7 for lifting at the bottom of the placement inspection frame 1, and a quick positioning mechanism 8 provided on one side of the fixed seat 601.

[0014] The lead screw 604 has a threaded connection to a displacement thread seat 606, and the displacement thread seats 606 are symmetrically distributed on the surface of the lead screw 604. One end of the displacement thread seat 606 is provided with a fixed connection seat 607.

[0015] Both sides of the connecting rigid pipe 4 near the fixed seat 601 are provided with fixedly connected limiting rings 608. A fixedly connected sealing seat 609 is provided on the side of the connecting rigid pipe 4 near the limiting ring 608. A sealing valve core 610 for sealing is provided inside the sealing seat 609. A fixedly connected rotating shaft 611 is provided at one end of the sealing valve core 610.

[0016] The end of the rotating shaft 611 away from the sealing valve core 610 is provided with a fixedly connected angle rotating gear 612. The end of the rotating shaft 611 near the angle rotating gear 612 is provided with a torsion spring 613 connected to the sealing seat 609. The bottom end of the sealing seat 609 near the torsion spring 613 is provided with a fixedly connected protective frame 614. The fixed seat 601 is provided with symmetrically distributed fixed toothed plates 615 at one end.

[0017] Working principle of the multi-station inspection mechanism 6: The electric vehicle sheet metal parts can be pre-placed on the top of two suction cups 3, and then the vacuum pump is activated so that the connecting rigid tube 4 can cooperate with the suction cups 3 to fix and suction the electric vehicle sheet metal parts. Then, the welding points of the electric vehicle sheet metal parts can be inspected by the inspection robotic arm 5.

[0018] After the inspection is completed, the shift drive control servo motor 603 can be started, so that the shift drive control servo motor 603 can rotate the lead screw 604 through the drive shaft connected to the output end. At the same time, when the lead screw 604 rotates, it can move the displacement thread seat 606 connected to the surface thread, and after moving, it can move the connecting seat 607 synchronously. When the connecting seat 607 moves, it can move the two connected placement inspection frames 1 synchronously, and after moving, it can realize the workstation movement, which can move another pre-fixed electric vehicle sheet metal part to the bottom of the inspection robot arm 5. The electric vehicle sheet metal part with the weld point inspection after displacement can be quickly taken out and repositioned and fixed, which improves the efficiency of surface weld point inspection of electric vehicle sheet metal parts.

[0019] Furthermore, as the two placement and testing frames 1 move, the connecting rigid pipe 4 can be moved synchronously. This movement of the connecting rigid pipe 4 causes the angle rotation gear 612 to move, and the angle rotation gear 612 can connect with the fixed toothed plate 615, allowing the angle rotation gear 612 to rotate. After rotation, the rotating shaft 611 and the sealing valve core 610 can rotate. The sealing valve core 610 has a semi-circular structure, initially parallel to the axial direction of the connecting rigid pipe 4, and does not obstruct airflow. When the angle rotation gear 612 meshes with the fixed toothed plate 615... After engagement, the angle-rotating gear 612 rotates, causing the rotating shaft 611 and the sealing valve core 610 to rotate synchronously by 90 degrees. This makes the sealing valve core 610 perpendicular to the axis of the connecting rigid pipe 4, blocking the internal channel of the connecting rigid pipe 4, thereby releasing the adsorption of the electric vehicle sheet metal parts. Furthermore, as the rotating shaft 611 moves, it can rotate the torsion spring 613 connected to the bottom end, thus facilitating the quick removal of the electric vehicle sheet metal parts after engagement. This avoids the negative pressure environment remaining, which may affect the removal of the electric vehicle sheet metal parts, and improves the efficiency of surface inspection of the electric vehicle sheet metal parts by the weld point detection device.

[0020] The lifting and anti-suction mechanism 7 includes a movable plate 701 set at the bottom of the placement and testing frame 1. The movable plate 701 has an inclined groove 702 inside. Guide rods 703 are provided on both sides of the movable plate 701 and are fixedly connected to it. A lifting rod 704 is fixedly connected to the top of the movable plate 701.

[0021] A limiting spring 705 connected to the fixed seat 601 is provided on the side of the top of the movable plate 701 near the lifting rod 704.

[0022] The inclined groove 702 is provided with a through-connected fixing rod 706, and one end of the fixing rod 706 is fixedly connected to the fixing seat 601.

[0023] Working principle of the lifting and anti-suction mechanism 7: As the placement and testing frame 1 is adjusted for its working position, the fixed rod 706 remains in a fixed position on the fixed base 601. The placement and testing frame 1 drives the moving plate 701 to move horizontally, causing the fixed rod 706 to slide relative to the fixed rod 706 within the inclined groove 702. Since the inclined groove 702 has an inclination angle of 30-60 degrees, when the fixed rod 706 slides along the inclined groove 702, it converts horizontal movement into vertical movement, pushing the moving plate 701 upwards along the guide rod 703, thus changing the direction of movement. The guide rod 703 guides and stabilizes the movement of the moving plate 701.

[0024] As the movable plate 701 moves, it can move the lifting rod 704 set at the top, so that the lifting rod 704 can lift the top of the testing frame 1. After being lifted, it can be pushed out from the bottom to the electric vehicle sheet metal part, which can then be removed when the weld point is inspected, improving the convenience of removal and speeding up the efficiency of the electric vehicle sheet metal part when the weld point is inspected.

[0025] The quick positioning mechanism 8 includes a fixed shaft 801 set at the top of the connecting seat 607. A limit block 802 is rotatably connected to the surface of the fixed shaft 801. A fixed locking seat 803 is set at the top of the fixed seat 601. A locking groove 804 matching the limit block 802 is opened inside the fixed locking seat 803.

[0026] The bottom end of the fixed locking seat 803 is provided with a movable pull rod 805, one end of the pull rod 805 is provided with a fixed guide plate 806, and both sides of the guide plate 806 are provided with stabilizing rods 807 that are connected to the inside of the fixed locking seat 803.

[0027] A push plate 808 is fixedly connected to the top of the guide plate 806, and symmetrically distributed reset springs 809 are connected between the push plate 808 and the guide plate 806.

[0028] Working principle of rapid positioning mechanism 8: The testing frame 1 can be pushed on one side of the fixed base 601, so that the fixed locking seat 803 on one side of the testing frame 1 can push the limiting block 802 when it moves, and can rotate around the fixed axis 801 after being pushed. At the same time, after rotating, it can lock and engage with the locking groove 804 inside the fixed locking seat 803, so as to achieve quick positioning and docking between the fixed base 601 and the testing frame 1.

[0029] When disassembly and separation are required, the pull rod 805 can be pushed, and the pull rod 805 can move the guide plate 806 set at the top in sync. When the guide plate 806 moves, it can move the push plate 808 set at the top in sync. The push plate 808 can push the limiting block 802 at the bottom, and the limiting block 802 can rotate around the fixed shaft 801. After rotation, it can separate from the locking groove 804.

[0030] At the same time, the guide plate 806 can simultaneously squeeze the reset spring 809 when it moves. After being ejected, the reset spring 809 can be moved and reset as the pull rod 805 is loosened, so that the push plate 808 can spring back to the reserved position. This enables quick disassembly and separation, improves the rapid assembly of the weld point detection device, and allows for timely surface inspection of electric vehicle sheet metal parts after assembly during operation.

[0031] Overall system workflow: Weld joint inspection: An ultrasonic inspection probe is installed at the end of the inspection robotic arm 5. The ultrasonic inspection probe emits ultrasonic waves towards the weld joint, receives the reflected signals and converts them into waveform data. The control system determines whether the weld joint quality is qualified based on the waveform data. The inspection robotic arm 5 can rotate left and right to realize multi-angle inspection of the sheet metal parts of electric vehicles, identify unqualified weld joints and improve the accuracy of inspection.

[0032] Multi-station inspection: Start the shift drive control servo motor 603, drive the lead screw 604 to rotate, and drive the two inspection frames 1 to move synchronously through the bottom moving wheels 2 to realize the switching of inspection stations. While one station is inspecting, the other station can perform loading and unloading operations, avoiding downtime and waiting, and improving the efficiency of surface weld point inspection of sheet metal parts of electric vehicles.

[0033] Fixed suction: One end of the connecting rigid tube 4 can be connected to the flexible tube, and after connection, it can be connected to the vacuum pump to form a negative pressure environment, which can stably place the electric vehicle sheet metal parts and improve the stability of surface inspection and treatment of electric vehicle sheet metal parts.

[0034] Assisted lifting: When the workstation is adjusted along with the placement of the inspection frame 1, the movable plate 701 can be moved by the fixed rod 706 and the inclined groove 702. After the movement, the lifting rod 704 can be moved synchronously, which can assist in the ejection of the electric vehicle sheet metal parts. This enables the auxiliary lifting of the electric vehicle sheet metal parts after the surface weld point inspection, which facilitates the placement and removal of the electric vehicle sheet metal parts and improves the weld point inspection of the electric vehicle sheet metal parts.

[0035] Quick docking: By moving the fixed locking seat 803, the limiting block 802 can be pushed after the movement, and it can rotate along the fixed axis 801 when pushed. At the same time, after flipping, it can lock with the locking groove 804, improving the quick and stable docking.

[0036] Summary of technical effects: This invention achieves the following through the coordinated operation of the multi-station detection mechanism 6, the lifting and anti-suction mechanism 7, and the rapid positioning mechanism 8: Multi-station operation and sealing and shut-off of negative pressure pipes; Lifting and anti-sucking mechanism for sheet metal parts in electric vehicles; Quick docking for placing test rack 1; This reduced operational complexity and production costs; It improves the efficiency of surface solder joint inspection.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sheet metal weld point inspection device for electric vehicles, comprising a testing rack (1), characterized in that: The number of the placement and testing racks (1) is two, and the two placement and testing racks (1) are switched alternately by a multi-station testing mechanism (6). The bottom of the placement and testing rack (1) is provided with four moving wheels (2) arranged in a rectangular array. The top of the placement and testing rack (1) is fixedly provided with a suction cup (3). The bottom of the suction cup (3) is fixedly connected with a connecting hard tube (4). The end of the connecting hard tube (4) away from the suction cup (3) is connected to an external vacuum pump through a hose. A testing robotic arm (5) is installed on one side of the placement and testing rack (1). The end of the testing robotic arm (5) is provided with a testing head mounting seat. A weld point testing probe is installed on the testing head mounting seat. A multi-station inspection mechanism (6) is provided between the placement inspection frame (1) and the inspection robot arm (5). The multi-station inspection mechanism (6) includes a fixed seat (601) provided between the placement inspection frame (1) and the inspection robot arm (5). A reinforcement box (602) is fixedly connected to one end of the fixed seat (601). A displacement drive control servo motor (603) is installed on one side of the reinforcement box (602). A lead screw (604) is provided inside the fixed seat (601) and rotatedly connected by a bearing. The lead screw (604) and the drive rod connected to the output end of the displacement drive control servo motor (603) are connected by a synchronous belt pulley (605). The bottom of the placement test rack (1) is provided with a lifting and anti-suction mechanism (7) for lifting, and a quick positioning mechanism (8) is provided on one side of the fixed base (601).

2. The sheet metal weld point detection device for electric vehicles according to claim 1, characterized in that: The lead screw (604) has two displacement thread seats (606) connected to its surface thread. The two displacement thread seats (606) are symmetrically arranged along the axial direction of the lead screw (604). One end of each displacement thread seat (606) is fixedly connected to a connecting seat (607), and the connecting seat (607) is fixedly connected to the bottom end of the placement test frame (1).

3. The sheet metal weld point detection device for electric vehicles according to claim 1, characterized in that: Limiting rings (608) are fixedly connected to both sides of the connecting rigid tube (4) near the fixed seat (601). A sealing seat (609) is fixedly connected to the side of the connecting rigid tube (4) near the limiting ring (608). A sealing valve core (610) is rotatably installed inside the sealing seat (609). The sealing valve core (610) is used to block the internal channel of the connecting rigid tube (4). A rotating shaft (611) is fixedly connected to one end of the sealing valve core (610).

4. The sheet metal weld point detection device for electric vehicles according to claim 3, characterized in that: An angle rotating gear (612) is fixedly connected to the end of the rotating shaft (611) away from the sealing valve core (610). A torsion spring (613) is sleeved on the end of the rotating shaft (611) close to the angle rotating gear (612). One end of the torsion spring (613) is fixedly connected to the sealing seat (609). A protective frame (614) is fixedly connected to the bottom end of the sealing seat (609) close to the side of the torsion spring (613). Fixed tooth plates (615) are fixedly provided at both ends of the fixed seat (601). The two fixed tooth plates (615) are symmetrically distributed along the central axis of the fixed seat (601). The angle rotating gear (612) meshes with the fixed tooth plate (615) when the placement test frame (1) moves.

5. The sheet metal weld point detection device for electric vehicles according to claim 1, characterized in that: The lifting and anti-suction mechanism (7) includes a movable plate (701) set at the bottom of the placement test frame (1). The movable plate (701) has an inclined groove (702) inside. The inclined groove (702) has an inclination angle of 30-60 degrees. Guide rods (703) are provided through both sides of the movable plate (701). The guide rods (703) are fixedly connected to the bottom of the placement test frame (1). The movable plate (701) is slidably connected along the guide rods (703). A lifting rod (704) is fixedly connected to the top of the movable plate (701). The lifting rod (704) passes through the top of the placement test frame (1) and is used to lift the sheet metal parts of the electric vehicle.

6. The sheet metal weld point detection device for electric vehicles according to claim 5, characterized in that: A limiting spring (705) connected to the fixed seat (601) is provided on the side of the top of the movable plate (701) near the lifting rod (704).

7. The sheet metal weld point detection device for electric vehicles according to claim 5, characterized in that: A fixed rod (706) slides through the inside of the inclined groove (702). One end of the fixed rod (706) is fixedly connected to the fixed seat (601). When the test frame (1) moves horizontally, the fixed rod (706) slides along the inclined groove (702), causing the moving plate (701) to move upward along the guide rod (703).

8. The sheet metal weld point detection device for electric vehicles according to claim 2, characterized in that: The quick positioning mechanism (8) includes a fixed shaft (801) fixedly mounted on the top of the connecting seat (607). A limiting block (802) is rotatably connected to the surface of the fixed shaft (801). A fixed locking seat (803) is fixedly mounted on the top of the fixed seat (601). A locking groove (804) matching the limiting block (802) is opened inside the fixed locking seat (803). The limiting block (802) can rotate around the fixed shaft (801) and be inserted into the locking groove (804) to achieve locking and positioning.

9. The sheet metal weld point detection device for electric vehicles according to claim 8, characterized in that: The bottom end of the fixed locking seat (803) is slidably connected to a pull rod (805), one end of the pull rod (805) is fixedly connected to a guide plate (806), and both sides of the guide plate (806) are slidably connected to a stabilizing rod (807). The two ends of the stabilizing rod (807) are fixedly connected to the inside of the fixed locking seat (803).

10. The sheet metal weld point detection device for electric vehicles according to claim 9, characterized in that: A push plate (808) is fixedly connected to the top of the guide plate (806). The push plate (808) is used to push the limiting block (802) to disengage it from the locking groove (804). Two return springs (809) are connected between the push plate (808) and the guide plate (806). The two return springs (809) are symmetrically distributed along the central axis of the guide plate (806).

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