Brake pedal robot welding fixture

Abstract

The application relates to the technical field of welding, and discloses a brake pedal robot welding tool, which comprises a case, the top of which is fixedly provided with an annular support frame, and the top of the annular support frame is movably provided with an annular rotary table; the case and the annular support frame are provided with a rotating mechanism for intermittently driving the annular rotary table to rotate; a work station frame is fixedly arranged on the top of the annular rotary table, and the work station frame divides the top of the annular rotary table into multiple work station areas with the same volume; a waste discharging assembly is arranged between the work station areas and the case; and a positioning tool is arranged in each work station area. The brake pedal robot welding tool realizes three-way positioning of the top, side and bottom of a brake pedal, solves the problem that a traditional clamp is difficult to accurately align, ensures that the positioning actions of a pedal arm and a pedal body are completely synchronized, improves the universality of the whole welding tool, meets the requirement of rapid welding, reduces the production cost, and significantly improves the welding precision.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to a welding fixture for a brake pedal robot. Background Technology

[0002] The brake pedal is an important device in the vehicle's cockpit used to control the braking system, and its main function is to slow down or stop the vehicle. The brake pedal generally consists of a pedal body and a pedal arm. During its manufacturing, it requires welding, and this welding process necessitates clamping the pedal; therefore, appropriate welding fixtures are required.

[0003] For example, Chinese patent CN102935566B discloses a welding fixture for automotive pedals, including a fixture base plate. The welding fixture is equipped with an adjusting block and an adjusting shim. The adjusting block has connecting bolt holes and locating pin holes, and the adjusting shim has slots corresponding to the positions of the connecting bolt holes and locating pin holes. Using this technical solution, the fixture can be quickly adjusted according to the on-site welding conditions; it can achieve standardization and is applicable to the production and manufacturing of various similar welding fixtures; it consumes less material, saving raw material costs; it improves the welding quality of the product; it is easy to maintain and has good interchangeability; and it has an aesthetically pleasing design.

[0004] However, in actual use, the aforementioned automotive pedal welding fixtures often struggle to accurately position the relative positions of the pedal arm and the pedal body, leading to welding deviations and affecting the performance of the brake pedal. Specifically, during the welding process, the brake pedal arm and pedal body cannot be positioned on the same welding fixture, requiring adjustment of the fixture to achieve docking. Furthermore, it is impossible to simultaneously position the pedal arm and pedal body, resulting in poor versatility of the entire welding fixture, making it difficult to adapt to rapid welding requirements. This leads to long equipment replacement and debugging times and high production costs. Therefore, there is an urgent need to design a robotic welding fixture for brake pedals to solve these problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a welding fixture for a brake pedal robot. The brake pedal arm and the pedal body are positioned on the same welding fixture, ensuring that the positioning movements of the pedal arm and the pedal body are completely synchronized. This improves the versatility of the entire welding fixture, meets the needs of rapid welding, reduces production costs, significantly improves welding accuracy, and solves the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for a brake pedal robot, comprising:

[0007] The chassis has an annular support frame fixedly installed on its top, and an annular turntable is movably installed on the top of the annular support frame. The chassis and the annular support frame are provided with a rotating mechanism for driving the annular turntable to rotate intermittently.

[0008] The workstation frame is fixedly installed on the top of the annular turntable, and the workstation frame divides the top of the annular turntable into multiple workstation areas of the same volume.

[0009] A waste discharge assembly is disposed between the workstation area and the chassis;

[0010] Each workstation is equipped with a positioning fixture, which includes a positioning frame fixedly installed on one side of the bottom center of the workstation. The inner wall of the positioning frame is fixedly installed with a pedal arm support for supporting the brake pedal. The top of the positioning frame is provided with a first positioning component for clamping the brake pedal arm. Both ends of the first positioning component are provided with centering components for centering the brake pedal arm. A connecting seat is fixedly installed at the bottom of one end of the positioning frame, and a pedal support for supporting the brake pedal body is fixedly installed at one end of the connecting seat. A second positioning component for clamping the brake pedal body is provided on the pedal support, and a linkage mechanism is provided between the second positioning component and the first positioning component.

[0011] Preferably, the rotating mechanism includes a toothed ring fixedly installed at the bottom of the annular turntable, and the outer wall of the toothed ring is rotatably connected to the inner wall of the annular support frame through a bearing. A drive gear is meshed on one side of the inner wall of the toothed ring, and a motor for driving the drive gear to rotate is fixedly installed on the top inner wall of the chassis.

[0012] Preferably, the workstation frame includes a central frame fixedly installed at the middle of the top of the annular turntable, and the surface of the central frame and the top of the annular turntable are fixedly equipped with partition plates that are distributed in a ring at equal intervals.

[0013] Preferably, the waste discharge assembly includes a central hole at the top center of the chassis, and a collection bucket is fixedly installed on the inner wall of the central hole and the bottom of the chassis. A waste discharge pipe extending out of the chassis is fixedly installed at the bottom of the collection bucket. A valve is installed at one end of the waste discharge pipe. A waste discharge port is opened on the other side at the bottom center of each workstation area. A waste discharge trough is opened at the bottom of the waste discharge port and the bottom of the annular turntable. An anti-fall net is fixedly installed on the inner wall of each waste discharge port. A discharge pipe is fixedly installed at the bottom of each waste discharge trough, and the discharge pipe is located above the collection bucket.

[0014] Preferably, a support frame is fixedly installed on the top of the inner wall of the collection bucket, and a mounting frame passing through the central hole and the middle of the annular turntable is fixedly installed at the top center of the support frame, and the welding robot is fixedly installed on the top of the mounting frame.

[0015] Preferably, the first positioning component includes an electric push rod fixedly installed at the top center of the positioning frame, and a compression seat is fixedly installed at the piston end of the electric push rod, with a protective pad installed at the bottom of the compression seat.

[0016] Preferably, the centering component includes guide openings on the top of both sides of the positioning frame, and L-shaped transverse seats are inserted into the inner walls of the guide openings. One side of the L-shaped transverse seat is in contact with both sides of the extrusion seat and is set as an inclined surface. A traction groove is opened on the inclined surface of the L-shaped transverse seat, and a second guide block inserted into the traction groove is installed on both inclined surfaces of the extrusion seat. Guide holes are opened on both sides of the positioning frame near the middle, and a movable cylinder inserted into the guide hole is fixed at the bottom of the L-shaped transverse seat. A centering clamp is inserted into the inner wall of the movable cylinder, and a first spring is fixedly installed on the outer wall of one end of the centering clamp and the inner wall of one end of the movable cylinder.

[0017] Preferably, the specifications of the pedal arm support are adapted to the bottom specifications of the brake pedal arm, and the top of the pedal arm support is rotatably connected with equally spaced sliding rollers, which are in contact with the bottom of the brake pedal arm. The specifications of the protective pad are adapted to the top specifications of the brake pedal arm, and the protective pad is in contact with the top of the brake pedal arm. The other end of the centering clamp is provided with equally spaced ball bearings, which are in contact with both sides of the brake pedal arm.

[0018] Preferably, the top surface of the pedal support is adapted to the bottom surface of the brake pedal body. The second positioning component includes a connecting hole formed in the pedal support and the connecting seat, and a top groove is formed at the top of the connecting hole. A sealing ring is installed on the inner wall of the top groove, and a flow equalization plate is installed in the middle of the inner wall of the top groove. A through hole is formed at one end of the connecting hole, and a pull rod is inserted into the inner wall of the through hole and the inner wall of the connecting hole. A movable plate is fixed at one end of the pull rod. A piston sleeve that fits against the inner wall of the connecting hole is fixedly installed on the outer wall of the movable plate, and a second spring is fixedly installed at one end of the movable plate and the inner wall of one end of the connecting hole.

[0019] Preferably, the linkage mechanism includes guide grooves formed on both sides of the pedal arm support and the bottom sides of the positioning frame, and guide racks passing through the guide grooves are fixedly installed on both sides of the compression seat. A long gear is rotatably connected to the inner wall of the positioning frame near the bottom by a pin. The outer walls of the long gear mesh with the two guide racks. A first guide block is fixedly installed at the bottom of the positioning frame, and a rack seat is slidably arranged on the first guide block. The rack seat meshes with the middle of the long gear, and one end of the rack seat is fixedly connected to the other end of the pull rod.

[0020] Compared with the prior art, the present invention provides a welding fixture for a brake pedal robot, which has the following advantages:

[0021] This robotic welding fixture for brake pedals utilizes an electric push rod within the first positioning component to drive the pressing seat downwards. This, combined with a protective pad, achieves flexible fixation of the top of the pedal arm, preventing deformation caused by rigid clamping. Simultaneously, it drives the centering component, using the inclined surface of the pressing seat to push the L-shaped transverse seat laterally. This causes the centering clamp to elastically clamp both sides of the pedal arm via a first spring, while ball bearings reduce friction, ensuring a smooth and damage-free centering process. The sliding rollers of the pedal arm support conform to the bottom of the pedal arm, providing stable support while allowing for slight sliding. This adapts to the positioning requirements of different pedal arm specifications, achieving three-dimensional positioning of the brake pedal (top, side, bottom), enabling precise positioning and synchronous clamping, improving welding accuracy, and solving the problem of inaccurate alignment with traditional fixtures.

[0022] This robotic welding fixture for brake pedals features a second positioning component that is linked to a pull rod via a piston sleeve within a connecting hole. When the pressing seat is pressed down, the linkage mechanism moves the pull rod, creating a negative pressure within the piston sleeve. This negative pressure is then evenly applied to the bottom surface of the pedal body via a flow equalization plate in the top groove. A sealing ring ensures the negative pressure seal, allowing for the rapid fixing of pedal bodies of different shapes using negative pressure adsorption. This avoids surface damage caused by traditional mechanical clamping and enables the positioning of the brake pedal arm and pedal body on the same welding fixture. This ensures that the positioning actions of the pedal arm and pedal body are completely synchronized, improving the versatility of the entire welding fixture, meeting the needs of rapid welding, reducing production costs, and significantly improving welding accuracy.

[0023] This brake pedal robot welding fixture uses a rotating mechanism driven by a motor to mesh with gears and a gear ring, causing the circular turntable to rotate intermittently. The workstation frame divides the turntable into multiple workstation areas, allowing for simultaneous loading, positioning, welding, and unloading of materials, thus achieving assembly line production and shortening the production cycle of a single workstation. The welding robot is integrated on the top of the mounting frame, located at the center of the circular turntable, and can cover all workstations 360°. Through program control, it achieves path planning and automatic welding, reducing manual intervention. Attached Figure Description

[0024] Figure 1 This is a perspective view of a welding fixture for a brake pedal robot according to the present invention.

[0025] Figure 2 This is a three-dimensional sectional view of a welding fixture for a brake pedal robot according to the present invention.

[0026] Figure 3 This is a schematic diagram of the rotating mechanism structure of a welding fixture for a brake pedal robot according to the present invention;

[0027] Figure 4 This is a schematic diagram of the mounting frame and support frame structure of a welding fixture for a brake pedal robot according to the present invention;

[0028] Figure 5This is a cross-sectional view of the annular turntable of a welding fixture for a brake pedal robot according to the present invention.

[0029] Figure 6 This is a schematic diagram of the positioning fixture structure of a welding fixture for a brake pedal robot according to the present invention;

[0030] Figure 7 This is a schematic diagram of the guide opening and guide hole structure of a welding fixture for a brake pedal robot according to the present invention;

[0031] Figure 8 This is a schematic diagram of the centering clamp and the first spring structure of a welding fixture for a brake pedal robot according to the present invention.

[0032] Figure 9 This is a schematic diagram of the sealing ring and flow equalization plate structure of a welding fixture for a brake pedal robot according to the present invention;

[0033] Figure 10 This is a schematic diagram of the connecting hole and piston sleeve structure of a welding fixture for a brake pedal robot according to the present invention.

[0034] The components include: 1. Chassis; 2. Annular support frame; 3. Annular turntable; 4. Waste discharge pipe; 5. Brake pedal; 6. Positioning fixture; 61. Positioning frame; 62. Electric push rod; 63. L-shaped transverse seat; 64. Pedal support seat; 65. Connecting seat; 66. Movable cylinder; 67. Extrusion seat; 68. Pedal arm support seat; 69. Guide rack; 610. Long gear; 611. Rack seat; 612. First guide block; 613. Pull rod; 614. Sliding roller; 615. Guide opening; 616. Guide hole; 617. Guide groove; 618. Pair 619. Middle clamp; 620. Ball bearing; 621. First spring; 622. Second guide block; 623. Traction groove; 624. Top groove; 625. Sealing ring; 626. Flow equalization plate; 627. Connecting hole; 628. Piston sleeve; 629. Second spring; 7. Welding robot; 80. Workstation frame; 81. Center frame; 82. Divider plate; 9. Waste discharge port; 10. Anti-fall net; 11. Mounting frame; 12. Support frame; 13. Collection bucket; 14. Motor; 15. Drive gear; 16. Gear ring; 17. Waste discharge groove; 18. Feed pipe. Detailed Implementation

[0035] 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.

[0036] Please see Figures 1-10 A welding fixture for a brake pedal robot, comprising:

[0037] The machine housing 1 has an annular support frame 2 fixedly installed on its top, and an annular turntable 3 is movably installed on the top of the annular support frame 2. The machine housing 1 and the annular support frame 2 are equipped with a rotating mechanism for driving the annular turntable 3 to rotate intermittently. The rotating mechanism includes a gear ring 16 fixedly installed at the bottom of the annular turntable 3, and the outer wall of the gear ring 16 is rotatably connected to the inner wall of the annular support frame 2 through a bearing. A drive gear 15 is meshed on one side of the inner wall of the gear ring 16, and a motor 14 for driving the drive gear 15 to rotate is fixedly installed on the top inner wall of the machine housing 1. The output shaft of the motor 14 drives the drive gear 15 to rotate. Since the drive gear 15 meshes with one side of the inner wall of the gear ring 16 fixed at the bottom of the annular turntable 3, the rotation of the drive gear 15 will drive the gear ring 16 and the annular turntable 3 to rotate intermittently, realizing multi-station cyclic welding operation.

[0038] The workstation frame 8 is fixedly installed on the top of the annular turntable 3, and the workstation frame 8 divides the top of the annular turntable 3 into multiple workstation areas of the same volume.

[0039] Waste discharge assembly is located between the workstation area and chassis 1;

[0040] Each workstation is equipped with a positioning fixture 6, which includes a positioning frame 61 fixedly installed on one side of the bottom center of the workstation. A pedal arm support 68 for supporting the brake pedal 5 is fixedly installed on the inner wall of the positioning frame 61. A first positioning component for clamping the brake pedal 5 pedal arm is provided on the top of the positioning frame 61. The first positioning component includes an electric push rod 62 fixedly installed at the top center of the positioning frame 61, and a compression seat 67 is fixedly installed on the piston end of the electric push rod 62. A protective pad is installed at the bottom of the compression seat 67. Both ends of the first positioning component are provided with centering components for centering the brake pedal 5 pedal arm. The centering components include guide openings 615 on the top of both sides of the positioning frame 61, and the inner walls of the guide openings 615 are inserted into… An L-shaped transverse shifter 63 is provided, with one side of the L-shaped transverse shifter 63 fitting against both sides of the extrusion seat 67, both of which are set as inclined surfaces. Traction grooves 622 are provided on the inclined surfaces of the L-shaped transverse shifter 63, and second guide blocks 621 inserted into the traction grooves 622 are installed on both sides of the inclined surfaces of the extrusion seat 67. Guide holes 616 are provided on both sides of the positioning frame 61 near the middle, and movable cylinders 66 inserted into the guide holes 616 are fixed to the bottom of the L-shaped transverse shifter 63. Centering clamps 618 are inserted into the inner walls of the movable cylinders 66. A first spring 620 is fixedly installed on the outer wall of one end of the centering clamp 618 and the inner wall of one end of the movable cylinder 66. A connecting seat 65 is fixedly installed at the bottom of one end of the positioning frame 61, and a useful... A pedal support 64 supports the pedal body of the brake pedal 5. A second positioning component is provided on the pedal support 64 to clamp the pedal body of the brake pedal 5. The second positioning component includes a connecting hole 626 formed in the pedal support 64 and the connecting seat 65. A top groove 623 is formed at the top of the connecting hole 626. A sealing ring 624 is installed on the inner wall of the top groove 623. A flow equalization plate 625 is installed in the middle of the inner wall of the top groove 623. A through hole is formed at one end of the connecting hole 626. A pull rod 613 is inserted into the inner wall of the through hole and the inner wall of the connecting hole 626. A movable plate is fixed to one end of the pull rod 613. A piston sleeve 627 is fixedly installed on the outer wall of the movable plate and fits against the inner wall of the connecting hole 626. One end of the movable plate is flush with the inner wall of one end of the connecting hole 626. A second spring 628 is fixedly installed, and a linkage mechanism is provided between the second positioning component and the first positioning component. The linkage mechanism includes guide grooves 617 on both sides of the pedal arm support 68 and both sides of the bottom of the positioning frame 61. Guide racks 69 passing through the guide grooves 617 are fixedly installed on both sides of the pressing seat 67. A long gear 610 is rotatably connected to the inner wall of the positioning frame 61 near the bottom via a pin. The outer walls of the long gear 610 mesh with the two guide racks 69. A first guide block 612 is fixedly installed at the bottom of the positioning frame 61, and a rack seat 611 is slidably arranged on the first guide block 612. The rack seat 611 meshes with the middle of the long gear 610, and one end of the rack seat 611 is fixedly connected to the other end of the pull rod 613.The pedal arm of brake pedal 5 is placed on the sliding roller 614 of the pedal arm support 68, and the pedal body of brake pedal 5 is placed on the pedal support 64, with the top of the pedal body corresponding to the bottom of the pedal arm. The electric push rod 62 in the first positioning assembly is activated, causing the compression seat 67 to move downward. The protective pad at the bottom of the compression seat 67 fits against the top of the pedal arm of brake pedal 5, stably clamping the pedal arm between the pedal arm support 68 and the compression seat 67. As the compression seat 67 moves downward, the second guide blocks 621 installed on the inclined surfaces on both sides of the compression seat 67 slide along the traction groove 622 on the inclined surface of the L-shaped transverse seat 63, pushing the L-shaped transverse seat 63 towards the center of the positioning frame 61. This causes the centering clamp 618 in the movable cylinder 66 to clamp the two sides of the pedal arm towards the center. The first spring 620 on the outer wall of one end of the centering clamp 618 and the inner wall of one end of the movable cylinder 66 provides elastic buffering to prevent excessive clamping force from damaging the pedal arm. When the pressing seat 67 moves downward to clamp the pedal arm, the linkage mechanism starts to work. The guide racks 69, which are fixedly installed on both sides of the pressing seat 67, move downward through the guide groove 617, driving the long gear 610 to rotate. This also drives the rack seat 611 to slide on the first guide block 612, thereby pulling the pull rod 613 and the piston sleeve 627 to move within the connecting hole 626, forming a negative pressure. The sealing ring 624 on the inner wall of the top groove 623 ensures the sealing of the negative pressure, and the flow equalization plate 625 in the middle of the inner wall of the top groove 623 makes the negative pressure evenly distributed. This stably adsorbs the pedal body onto the pedal support 64, realizing the top, side, and bottom three-way positioning of the brake pedal 5. It also realizes the function of positioning the pedal arm and the pedal body of the brake pedal 5 on the same welding fixture, ensuring that the positioning actions of the pedal arm and the pedal body are completely synchronized, improving the versatility of the entire welding fixture, meeting the needs of rapid welding, reducing production costs, and significantly improving welding accuracy.

[0041] To enable multi-station welding operations and avoid interference between different stations, please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 A workstation frame 8 needs to be set up. The workstation frame 8 includes a central frame 81 fixedly installed at the middle of the top of the annular turntable 3. The surface of the central frame 81 and the top of the annular turntable 3 are fixedly installed with partition plates 82 that are evenly distributed in a ring. The partition plates 82 and the central frame 81 divide the top of the annular turntable 3 into multiple workstation areas of the same volume. Each workstation area corresponds to a set of positioning fixtures 6 for positioning brake pedal 5, which facilitates multi-station welding operations and prevents interference between different workstations.

[0042] To maintain a clean working environment and prevent waste from affecting the normal operation of equipment, please refer to [link / reference needed]. Figure 1 , Figure 2 , Figure 3 and Figure 4A waste discharge assembly is required. The waste discharge assembly includes a central hole at the top center of the chassis 1, and a collection bucket 13 is fixedly installed on the inner wall of the central hole and the bottom of the chassis 1. A waste discharge pipe 4 extending out of the chassis 1 is fixedly installed at the bottom of the collection bucket 13. A valve is installed at one end of the waste discharge pipe 4. A waste discharge port 9 is opened on the other side at the bottom center of each work station area. A waste discharge trough 17 is opened at the bottom of the waste discharge port 9 and the bottom of the annular turntable 3. A fall-proof net 10 is fixedly installed on the inner wall of the waste discharge port 9. A feeding pipe 18 is fixedly installed at the bottom of the waste discharge trough 17 and is located above the collection bucket 13. During the welding process, the welding debris, sparks and other waste generated fall from the waste discharge port 9 at the bottom of the work station area, and then fall into the collection bucket 13 along the waste discharge trough 17 and the feeding pipe 18, which facilitates the collection of waste.

[0043] To enable multi-station welding operations, please refer to [link / reference]. Figure 1 and Figure 2 A welding robot 7 needs to be set up. A support frame 12 is fixedly installed on the top of the inner wall of the material collection bucket 13. A mounting frame 11 passing through the center hole and the middle of the annular turntable 3 is fixedly installed at the top middle of the support frame 12. The welding robot 7 is fixedly installed on the top of the mounting frame 11. The welding robot 7 controls the movement trajectory and welding parameters of the welding torch according to the preset program to automatically weld the connection between the pedal arm and the pedal body of the brake pedal 5, realizing multi-station welding operation.

[0044] To ensure smooth and precise clamping, please refer to [link / reference]. Figure 6 , Figure 7 and Figure 8 A welding robot 7 needs to be installed. The specifications of the pedal arm support 68 are adapted to the bottom specifications of the brake pedal 5 pedal arm, and the top of the pedal arm support 68 is rotatably connected with equally spaced sliding rollers 614. The sliding rollers 614 are attached to the bottom of the brake pedal 5 pedal arm. The specifications of the protective pad are adapted to the top specifications of the brake pedal 5 pedal arm, and the protective pad is attached to the top of the brake pedal 5 pedal arm. The other end of the centering clamp 618 is provided with equally spaced ball bearings 619, and the ball bearings 619 are attached to the brake pedal 5 pedal arm. During the clamping process, the equally spaced sliding rollers 614, which are rotatably connected to the top of the pedal arm support 68, will fit against the bottom of the pedal arm, providing support for the pedal arm while allowing the pedal arm to slide slightly within a certain range, making it easy to adjust its position. The protective pad at the bottom of the compression seat 67 fits against the top of the pedal arm, preventing damage to the pedal arm during clamping. The ball bearings 619, which are rolled at the other end of the centering clamp 618, will fit against both sides of the pedal arm, reducing friction during clamping and ensuring a stable and precise clamping process.

[0045] In summary, the working principle of this invention is as follows: In use, the pedal arm of the brake pedal 5 is first placed on the pedal arm support 68 on the inner wall of the positioning frame 61. The specifications of the pedal arm support 68 are adapted to the specifications of the bottom of the pedal arm. The equally spaced sliding rollers 614 rotatably connected at the top are attached to the bottom of the pedal arm, providing support for the pedal arm while allowing the pedal arm to slide slightly within a certain range, which is convenient for adjusting the position. At the same time, the pedal body of the brake pedal 5 is placed on the pedal support 64, with the top of the pedal body corresponding to the bottom of the pedal arm.

[0046] Next, the electric push rod 62 in the first positioning assembly is activated. The piston end of the electric push rod 62 drives the compression seat 67 to move downward. The protective pad at the bottom of the compression seat 67 is in contact with the top of the brake pedal 5 pedal arm. As the electric push rod 62 continues to press down, the pedal arm is stably clamped between the pedal arm support 68 and the compression seat 67. The protective pad can prevent damage to the pedal arm during clamping. When the compression seat 67 moves downward, since both sides of the compression seat 67 are in contact with one side of the L-shaped transverse seat 63 and are both inclined, the second guide blocks 621 installed on the inclined surfaces of the two sides of the compression seat 67 follow the traction groove 62 on the inclined surface of the L-shaped transverse seat 63. 2. Slide and push the L-shaped transverse seat 63 to move towards the middle of the positioning frame 61. The movable cylinder 66 at the bottom of the L-shaped transverse seat 63 is inserted into the guide holes 616 on both sides of the positioning frame 61 near the middle. As the L-shaped transverse seat 63 moves, it drives the centering clamp 618 in the movable cylinder 66 to clamp the two sides of the pedal arm towards the middle. The first spring 620 on the outer wall of one end of the centering clamp 618 and the inner wall of one end of the movable cylinder 66 provides elastic buffer to avoid excessive clamping force and damage to the pedal arm. The equally distributed balls 619 at the other end of the centering clamp 618 roll against the two sides of the pedal arm to reduce the friction during clamping and ensure a smooth and accurate centering process.

[0047] When the squeezing seat 67 moves downward to clamp the pedal arm, the linkage mechanism starts to work. The guide racks 69 fixedly installed on both sides of the squeezing seat 67 move downward through the guide grooves 617 on both sides of the pedal arm support 68 and the bottom sides of the positioning frame 61, driving the long gear 610 connected to the bottom inner wall of the positioning frame 61 to rotate. When the long gear 610 rotates, the rack seat 611 meshing with the middle of the long gear 610 slides on the first guide block 612. One end of the rack seat 611 is fixedly connected to the other end of the pull rod 613, thereby pulling the pull rod 613 to move. The movable disc fixed at one end of the pull rod 613 drives the piston sleeve 627 on the outer wall to move in the pedal support 64 and the connecting hole 626 in the connecting seat 65, forming a negative pressure. The sealing ring 624 on the inner wall of the top groove 623 ensures the sealing of the negative pressure. The flow equalization disc 625 in the middle of the inner wall of the top groove 623 makes the negative pressure evenly distributed, thereby stably adsorbing the pedal body onto the pedal support 64.

[0048] Then, after the system issues a workstation switching command, the motor 14 on the inner wall of the top of the chassis 1 starts. The output shaft of the motor 14 drives the drive gear 15 to rotate. Since the drive gear 15 meshes with one side of the inner wall of the gear ring 16 fixed at the bottom of the annular turntable 3, the rotation of the drive gear 15 will drive the gear ring 16 to rotate, thus causing the annular turntable 3 to rotate intermittently. After the annular turntable 3 rotates one workstation, the motor 14 stops. During the rotation of the annular turntable 3, the workstation frame 8 rotates accordingly to ensure that the relative positions of each workstation area are fixed, so that the welding robot 7 can accurately align the brake pedal 5 of each workstation area for welding operations. At this time, the welding robot 7 controls the movement trajectory and welding parameters of the welding torch according to the preset program to automatically weld the connection between the pedal arm and the pedal body of the brake pedal 5. After the welding is completed, wait for the annular turntable 3 to switch to the next workstation and continue to weld the new brake pedal 5 to achieve multi-workstation cyclic operation.

[0049] Finally, during the welding process, the welding debris, sparks and other waste generated fall from the waste discharge port 9 at the bottom of the work area and then into the waste discharge tank 17. The waste discharge tank 17 guides the debris through the bottom feed pipe 18 into the collection bucket 13. When the waste in the collection bucket 13 accumulates to a certain amount, the valve at one end of the waste discharge pipe 4 is opened to discharge the waste, keeping the working environment clean and preventing the waste from affecting the normal operation of the equipment.

[0050] 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 welding fixture for a brake pedal robot, characterized in that, include: The chassis (1) has a ring support frame (2) fixedly installed on its top, and a ring turntable (3) is movably provided on the top of the ring support frame (2). The chassis (1) and the ring support frame (2) are provided with a rotating mechanism for driving the ring turntable (3) to rotate intermittently. The workstation frame (8) is fixedly installed on the top of the annular turntable (3), and the workstation frame (8) divides the top of the annular turntable (3) into multiple workstation areas of the same volume. Waste discharge assembly, which is disposed between the workstation area and the chassis (1); Each workstation is equipped with a positioning fixture (6), and the positioning fixture (6) includes a positioning frame (61) fixedly installed on one side of the bottom middle of the workstation. The inner wall of the positioning frame (61) is fixedly installed with a pedal arm support (68) for supporting the brake pedal (5), and the top of the positioning frame (61) is provided with a first positioning component for clamping the brake pedal (5) pedal arm. Both ends of the first positioning component are provided with centering components for centering the brake pedal (5) pedal arm. A connecting seat (65) is fixedly installed at the bottom of one end of the positioning frame (61), and a pedal support (64) for supporting the brake pedal (5) pedal body is fixedly installed at one end of the connecting seat (65). A second positioning component for clamping the brake pedal (5) pedal body is provided on the pedal support (64). The first positioning component includes an electric push rod (62) fixedly installed at the top center of the positioning frame (61), and a compression seat (67) is fixedly installed on the piston end of the electric push rod (62), and a protective pad is installed on the bottom of the compression seat (67). The centering assembly includes guide openings (615) on the top of both sides of the positioning frame (61), and L-shaped transverse seats (63) are inserted into the inner walls of the guide openings (615). One side of the L-shaped transverse seats (63) is in contact with both sides of the extrusion seat (67) and is set as an inclined surface. Traction grooves (622) are opened on the inclined surfaces of the L-shaped transverse seats (63), and second guide blocks (621) inserted into the traction grooves (622) are installed on the inclined surfaces of both sides of the extrusion seat (67). Guide holes (616) are opened on both sides of the positioning frame (61) near the middle, and movable cylinders (66) inserted into the guide holes (616) are fixed at the bottom of the L-shaped transverse seats (63). Centering clamps (618) are inserted into the inner walls of the movable cylinders (66), and a first spring (620) is fixedly installed on the outer wall of one end of the centering clamp (618) and the inner wall of one end of the movable cylinder (66). The specifications of the pedal arm support (68) are adapted to the bottom specifications of the brake pedal (5) pedal arm, and the top of the pedal arm support (68) is rotatably connected with equally distributed sliding rollers (614), which are attached to the bottom of the brake pedal (5) pedal arm. The specifications of the protective pad are adapted to the top specifications of the brake pedal (5) pedal arm, and the protective pad is attached to the top of the brake pedal (5) pedal arm. The other end of the centering clamp (618) is rolled with equally distributed balls (619), which are attached to both sides of the brake pedal (5) pedal arm. The top surface of the pedal support (64) is adapted to the bottom surface of the brake pedal (5) body. The second positioning component includes a connecting hole (626) opened in the pedal support (64) and the connecting seat (65). A top groove (623) is opened at the top of the connecting hole (626). A sealing ring (624) is installed on the inner wall of the top groove (623). A flow equalization plate (625) is installed in the middle of the inner wall of the top groove (623). A through hole is opened at one end of the connecting hole (626). A pull rod (613) is inserted into the inner wall of the through hole and the inner wall of the connecting hole (626). A movable plate is fixed at one end of the pull rod (613). A piston sleeve (627) is fixedly installed on the outer wall of the movable plate and fits against the inner wall of the connecting hole (626). A second spring (628) is fixedly installed at one end of the movable plate and the inner wall of one end of the connecting hole (626). A linkage mechanism is provided between the second positioning component and the first positioning component. The linkage mechanism includes guide grooves (617) on both sides of the pedal arm support (68) and the bottom sides of the positioning frame (61). Guide racks (69) passing through the guide grooves (617) are fixedly installed on both sides of the pressing seat (67). A long gear (610) is rotatably connected to the inner wall of the positioning frame (61) near the bottom by a pin. The outer walls of the long gear (610) mesh with the two guide racks (69). A first guide block (612) is fixedly installed at the bottom of the positioning frame (61). A rack seat (611) is slidably provided on the first guide block (612). The rack seat (611) meshes with the long gear (610) at the middle. One end of the rack seat (611) is fixedly connected to the other end of the pull rod (613).

2. The welding fixture for a brake pedal robot according to claim 1, characterized in that, The rotating mechanism includes a toothed ring (16) fixedly installed at the bottom of the annular turntable (3), and the outer wall of the toothed ring (16) is rotatably connected to the inner wall of the annular support frame (2) through a bearing. A drive gear (15) is meshed on one side of the inner wall of the toothed ring (16), and a motor (14) for driving the drive gear (15) to rotate is fixedly installed on the top inner wall of the housing (1).

3. The welding fixture for a brake pedal robot according to claim 2, characterized in that, The workstation frame (8) includes a central frame (81) fixedly installed at the middle of the top of the annular turntable (3), and the surface of the central frame (81) and the top of the annular turntable (3) are fixedly installed with partition plates (82) that are distributed in a ring at equal distances.

4. The welding fixture for a brake pedal robot according to claim 1, characterized in that, The waste discharge assembly includes a central hole at the top center of the machine housing (1), and a collection bucket (13) is fixedly installed on the inner wall of the central hole and the bottom of the machine housing (1). A waste discharge pipe (4) extending out of the machine housing (1) is fixedly installed at the bottom of the collection bucket (13). A valve is installed at one end of the waste discharge pipe (4). A waste discharge port (9) is opened on the other side at the bottom center of each work station area. A waste discharge trough (17) is opened at the bottom of the waste discharge port (9) and the bottom of the annular turntable (3). A fall-proof net (10) is fixedly installed on the inner wall of the waste discharge port (9). A discharge pipe (18) is fixedly installed at the bottom of the waste discharge trough (17). The discharge pipe (18) is located above the collection bucket (13).

5. The welding fixture for a brake pedal robot according to claim 4, characterized in that, A support frame (12) is fixedly installed on the top of the inner wall of the collection bucket (13), and a mounting frame (11) passing through the center hole and the middle of the annular turntable (3) is fixedly installed at the top middle of the support frame (12). The welding robot (7) is fixedly installed on the top of the mounting frame (11).

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