Clamp switching system based on automobile welding

Abstract

The invention relates to a clamp switching system based on automobile welding, and belongs to the technical field of automobile part welding, the clamp switching system based on automobile welding comprises a positioner, a vertical warehouse, a lifting machine and a telescopic conveyor, the positioner is used for installing a tool clamp and driving the tool clamp to move, the vertical warehouse is used for storing the tool clamp, and the lifting machine is used for conveying the tool clamp to the telescopic conveyor. The elevator is located between the position changing machine and the three-dimensional warehouse, the telescopic conveyor is arranged on the elevator, the elevator is used for driving the telescopic conveyor to ascend and descend, and the telescopic direction of the telescopic conveyor is parallel to the arrangement direction of the position changing machine and the three-dimensional warehouse. The telescopic conveyor is used for conveying the tool clamps in the direction close to the position changing machine or the vertical warehouse. The device has the effect that the tool clamps are convenient to switch.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts welding, and in particular to a fixture switching system based on automobile welding. Background Art

[0002] In the automated welding of body parts, welding robots and fixtures are the core equipment for welding operations. The fixtures are used to clamp and fix the body parts. After the body parts are moved to the welding position by the fixtures, welding is performed by the welding robots.

[0003] At present, in order to meet the welding requirements of automobile parts welding lines that can quickly adapt to different car models, welding robots can use different welding procedures for different car models to complete the welding work of parts for different car models. However, the tooling and fixtures for the floor parts of different car models are usually different. Due to the heavy weight of the tooling and fixtures, it is difficult for operators to replace them. Summary of the invention

[0004] In order to facilitate the replacement of tooling fixtures, the present invention provides a fixture switching system based on automobile welding.

[0005] The present invention provides a fixture switching system based on automobile welding, which adopts the following technical solution: A fixture switching system based on automobile welding includes a positioner, a vertical warehouse, an elevator and a telescopic conveyor. The positioner is used to install tooling fixtures and drive the tooling fixtures to move. The vertical warehouse is used to store tooling fixtures. The elevator is located between the positioner and the vertical warehouse. The telescopic conveyor is arranged on the elevator. The elevator is used to drive the telescopic conveyor to rise and fall. The telescopic direction of the telescopic conveyor is parallel to the arrangement direction of the positioner and the vertical warehouse. The telescopic conveyor is used to transport the tooling fixtures toward the direction close to the positioner or the vertical warehouse.

[0006] Preferably, the positioner includes a base, a rotating platform, a fixture fixing platform and a rotating mechanism. The rotating platform is arranged on the base to rotate along the vertical direction. There are multiple fixture fixing platforms, and multiple fixture fixing platforms are arranged on the rotating platform. The fixture fixing platform is used to place tooling fixtures. The rotating mechanism is arranged on the base, and the rotating mechanism is used to drive the rotating platform to rotate.

[0007] Preferably, each of the fixture fixing platforms includes two support platforms relatively arranged on the rotating platform, and each of the support platforms is installed with a cylinder and a positioning seat. The extension direction of the cylinder is parallel to the vertical direction, and the positioning seat is used to cooperate with the positioning structure on the lower surface of the tooling fixture.

[0008] Preferably, a connecting plate is provided on the piston rod of the cylinder, and a limit block is provided on the connecting plate for sliding in the horizontal direction. The limit block is used to abut against a side of the edge of the tooling fixture away from the cylinder, and an adjustment component is provided on the support platform for adjusting the limit block to move in a direction close to or away from the tooling fixture.

[0009] The cam is an angular channel formed between a pair of camshafts and a pair of camshafts, and the camshafts are connected by a threaded connection to the top of the camshaft. The camshafts are connected by a threaded connection to the top of the camshaft. When the camshafts are connected, the camshafts are connected by a threaded connection to the top of the camshaft.

[0010] Preferably, a limited arc railing is provided on the rotating platform, the center of the circle of the limited arc railing is concentric with the center of the rotating platform, and the distance from the side of the limited arc railing away from the center of the rotating platform to the center of the rotating platform is greater than the distance from the side of the tooling fixture located on the fixture fixing platform away from the center of the rotating platform to the center of the rotating platform.

[0011] Preferably, the vertical warehouse includes storage racks and storage platforms, and the storage platforms are arranged in multiple layers along the vertical direction of the storage racks. Each layer of the storage platforms includes multiple placement groups, and each group of the placement groups includes multiple support rods relatively arranged on the storage racks.

[0012] Preferably, a positioning pin is provided on one side of the support rod in each placement group, and a cushion block is provided on the other side of the support rod, and the positioning pin is used to be plugged and matched with the positioning structure on the lower surface of the fixture.

[0013] Preferably, the elevator includes a bracket, a lifting frame slidably arranged on the bracket and a driving source arranged on the bracket, the lifting frame is slidably arranged on the bracket in a vertical direction, the telescopic conveyor is arranged on the lifting frame, and the driving source is used to drive the lifting frame to drive the telescopic conveyor to move up and down.

[0014] Preferably, the telescopic conveyor is a telescopic fork, and the telescopic fork is arranged on a lifting frame, and the telescopic direction of the telescopic fork is parallel to the arrangement direction of the positioner and the vertical warehouse.

[0015] In summary, the present invention includes the following beneficial technical effects: When in use, the tooling fixture to be replaced is moved to the alignment hoist by the positioner, and then the telescopic conveyor is moved to align with the tooling fixture to be replaced by the hoist, and then the telescopic conveyor is extended to the bottom of the tooling fixture to be replaced, and then the telescopic conveyor is raised by the hoist, so that the telescopic conveyor lifts the tooling fixture to be replaced, and the tooling fixture to be replaced is separated from the positioner, and then the telescopic conveyor transports the tooling fixture to the hoist, and then the hoist drives the telescopic conveyor and the tooling fixture to be replaced to the required height, and the tooling fixture to be replaced is moved to the vertical warehouse by the telescopic conveyor; then the hoist drives the telescopic conveyor to move downward, so that the tooling fixture to be replaced is placed on the vertical warehouse, and the hoist continues to drive the telescopic conveyor downward , so that the telescopic conveyor is separated from the tooling fixture, and then the telescopic conveyor is retracted to complete the storage of the replaced tooling fixture; then the telescopic conveyor is moved to align with the selected tooling fixture through the hoist, the telescopic conveyor moves to the bottom of the selected tooling fixture, and the telescopic conveyor is raised by the hoist, the telescopic conveyor lifts the selected tooling fixture, and then the telescopic conveyor moves the selected tooling fixture out of the vertical warehouse, the hoist drives the telescopic conveyor and the selected tooling fixture to the installation height, the telescopic conveyor transports the selected tooling fixture to the positioner, and then the hoist drives the telescopic conveyor to move downward, so that the telescopic conveyor is separated from the tooling fixture, and then the telescopic conveyor is retracted, thereby completing the replacement of the tooling fixture, which is convenient and fast and saves manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the overall structure of the positioner in an embodiment of the present invention, and is mainly used to show the state of the positioner being installed with a fixture.

[0018] Figure 3 It is a schematic diagram of the overall structure of the positioner from another perspective in an embodiment of the present invention, and is mainly used to show the state where a fixture is not installed on one side of the positioner.

[0019] Figure 4 It is a schematic diagram of the overall structure of the hoist and the vertical warehouse in an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of the overall structure of adjacent support rods in an embodiment of the present invention.

[0021] Figure 6 Schematic diagram of the structure of the regulating component in the embodiment of the present invention.

[0022] Explanation of the reference numerals in the accompanying drawings: 1. Positioner; 11. Base; 12. Rotating platform; 13. Fixture fixing platform; 131. Support table; 2. Vertical warehouse; 21. Storage rack; 22. Storage platform; 221. Placement group; 2211. Support rod; 3. Hoist; 31. Bracket; 32. Lifting frame; 33. Driving source; 331. Winch; 332. Wire rope; 4. Telescopic conveyor; 5. Cylinder; 6. Positioning seat; 7. Connecting plate; 8. Limit block; 9. Rack; 10. Spring; 14. Screw; 15. Gear; 16. Transmission telescopic rod; 161. First rod body; 162. Second rod body; 17. Limit arc railing; 18. Positioning pin; 19. Pad; 20. Support plate; 23. Support rod; 24. Guide block; 25. Support block; 26. Guide pulley group; 27. Fixture. DETAILED DESCRIPTION

[0023] The following combination Figure 1-Figure 6 The present invention is described in further detail.

[0024] The embodiment of the present invention discloses a fixture switching system based on automobile welding. Figure 1 The fixture switching system based on automobile welding includes a positioner 1, a vertical warehouse 2, an elevator 3 and a telescopic conveyor 4. The positioner 1, the vertical warehouse 2 and the elevator 3 are all installed in the welding site, wherein the positioner 1 is used to install the tooling fixture 27 and drive the tooling fixture 27 to move. The tooling fixture 27 is a fixture for fixing the floor in the car, usually in a rectangular structure. The vertical warehouse 2 is used to store the tooling fixture 27. The vertical warehouse 2 has an opening on the side facing the positioner 1 to facilitate the removal and entry of the tooling fixture 27; the elevator 3 adopts a gantry elevator, the elevator 3 is located between the positioner 1 and the vertical warehouse 2, and the telescopic conveyor 4 is arranged on the elevator 3. The elevator 3 is used to drive the telescopic conveyor 4 to move up and down, and the telescopic conveyor 4 is used to transport the tooling fixture 27 toward the positioner 1 or the vertical warehouse 2.

[0025] When it is necessary to switch the fixture, the tooling fixture 27 to be replaced is moved to the alignment hoist 3 by the positioner 1, and then the telescopic conveyor 4 is moved to align with the tooling fixture 27 to be replaced by the hoist 3, and then the telescopic conveyor 4 is extended to the bottom of the tooling fixture 27 to be replaced, and the hoist 3 is used to raise the telescopic conveyor 4, so that the telescopic conveyor 4 lifts the tooling fixture 27 to be replaced, so that the tooling fixture 27 to be replaced is separated from the positioner 1, and then the telescopic conveyor 4 moves the tooling fixture 27 toward the vertical warehouse 2. The tooling fixture 27 to be replaced is transported to the elevator 3 in the direction of rotation, and then the elevator 3 drives the telescopic conveyor 4 and the tooling fixture 27 to be replaced to the required height, and the tooling fixture 27 to be replaced is moved to the vertical warehouse 2 through the telescopic conveyor 4; then the elevator 3 drives the telescopic conveyor 4 to move downward, so that the tooling fixture 27 to be replaced is placed on the vertical warehouse 2, and the elevator 3 continues to drive the telescopic conveyor 4 to move downward, so that the telescopic conveyor 4 is separated from the tooling fixture 27, and then the telescopic conveyor 4 is retracted to complete the storage of the replaced tooling fixture 27.

[0026] Then, the telescopic conveyor 4 is moved to align with the selected fixture 27 by the hoist 3, and the telescopic conveyor 4 is extended toward the vertical warehouse 2 and moved to the bottom of the selected fixture 27. The telescopic conveyor 4 is raised by the hoist 3, and the telescopic conveyor 4 lifts the selected fixture 27. Then, the telescopic conveyor 4 moves the selected fixture 27 out of the vertical warehouse 2. The hoist 3 drives the telescopic conveyor 4 and the selected fixture 27 to the installation height, and the telescopic conveyor 4 moves the selected fixture 27 to the positioner 1. Direction conveying, then the hoist 3 drives the telescopic conveyor 4 to move downward, so that the selected tooling fixture 27 is placed on the positioner 1, the telescopic conveyor 4 continues to move downward and disengages from the tooling fixture 27, and then the telescopic conveyor 4 is recovered, thereby completing the replacement of the tooling fixture 27, which is convenient, fast, and saves manpower. Next, the tooling fixture 27 can be driven by the positioner 1 to move to the workpiece loading place for workpiece installation, and then the tooling fixture 27 and the workpiece can be driven by the positioner 1 to move to the welding position for welding by the welding robot.

[0027] Reference Figure 2 and Figure 3In order to facilitate the installation of the fixture 27 and drive the fixture 27 to move, the positioner 1 includes a base 11, a rotary platform 12, a fixture fixing platform 13 and a rotary mechanism. The base 11 is fixed to the welding site. The rotary platform 12 is arranged on the base 11 in a vertical direction, that is, the rotation axis of the rotary platform 12 is arranged in a vertical direction. The rotary platform 12 is rectangular. There are multiple fixture fixing platforms 13, and the multiple fixture fixing platforms 13 are all fixedly arranged on the rotary platform 12. The fixture fixing platforms 13 are used to install the fixture 27. The arrangement of multiple fixture fixing platforms 13 facilitates the installation of multiple fixtures 27. In the embodiment of the present invention, two fixture fixing platforms 13 are arranged relatively. In other embodiments, the number of fixture fixing platforms 13 can be set as needed. The rotary mechanism is arranged on the base 11, and the rotary mechanism is used to drive the rotary platform 12 to rotate.

[0028] Reference Figure 2 and Figure 3 In order to drive the rotating platform 12 to rotate, the rotating mechanism can use a reduction motor or a gear motor box, which is not limited here. A rotating shaft (not marked in the figure) is fixed at the center of the rotating platform 12, and the rotating shaft rotates on the base 11. The rotating shaft is coaxially fixed with the output shaft of the rotating mechanism. The rotating shaft can drive the rotating platform 12 and the fixture fixing platform 13 to rotate through the rotating mechanism, so that the fixture fixing platform 13 can drive the tooling fixture 27 to move to the required position for loading, replacement or workpiece welding as needed.

[0029] Reference Figure 3 Each fixture fixing platform 13 includes two support platforms 131 relatively fixed on the rotary platform 12, the length direction of the support platform 131 is parallel to the arrangement direction of the two fixture fixing platforms 13, and the two support platforms 131 of the fixture fixing platform 13 are respectively used to support the two ends of the tooling fixture 27, and each support platform 131 is installed with a cylinder 5 and a positioning seat 6, and the cylinder 5 is embedded in the support platform 131, and there are two cylinders 5 on each support platform 131 spaced apart along the length direction of the support platform 131, and a support block 25 is fixed on the piston rod of the cylinder 5 The support block 25 is used to support the fixture 27; the positioning seat 6 on the support platform 131 corresponds to the cylinder 5 one by one, and the arrangement direction of the positioning seat 6 and the corresponding cylinder 5 is parallel to the length direction of the support platform 131. The positioning seat 6 is used to cooperate with the positioning part of the lower surface of the fixture 27. Specifically, a positioning hole can be opened on the positioning seat 6, and a positioning column that is plugged into the positioning hole is fixed on the lower surface of the fixture 27; or a positioning column can be fixed on the positioning seat 6, and a positioning hole that is plugged into the positioning column is opened on the lower surface of the fixture 27, which is not limited here.

[0030] When the tooling fixture 27 needs to be replaced, the cylinders 5 on the support platforms 131 on both sides lift the tooling fixture 27 to be replaced at the same time, and then the telescopic conveyor 4 extends under the tooling fixture 27 to be replaced between the two support platforms 131, and the telescopic conveyor 4 is driven by the hoist 3 to lift the tooling fixture 27 to be replaced, so that the tooling fixture 27 is separated from the multiple support blocks 25 on the support platform 131, so as to facilitate the removal of the tooling fixture 27 from the fixture fixing platform 13.

[0031] When the telescopic conveyor 4 conveys the selected jig 27 to the top of the jig fixing platform 13, the multiple cylinders 5 on the support platform 131 are started and raised at the same time, so that the support block 25 on the piston rod of the cylinder 5 abuts against the bottom of the selected jig 27, and then the telescopic conveyor 4 moves down and disengages from the selected jig 27, then the telescopic conveyor 4 is retracted to the elevator 3, and then the cylinder 5 is retracted downward to drive the jig 27 to move down so that the positioning part on the jig 27 is plugged into the positioning seat 6, thereby realizing the replacement of the jig 27, which is simple and convenient and saves manpower. Since the jig 27 has a certain weight, it is not easy to move horizontally under the action of the positioning seat 6.

[0032] Reference Figure 3 In order to facilitate the position limiting of the fixture 27, two guide blocks 24 are relatively fixed on the side of the rotary platform 12 close to the fixture fixing platform 13. The guide blocks 24 are provided with V-shaped grooves, which penetrate the guide blocks 24 from top to bottom. The V-shaped grooves are used to cooperate with the V-shaped blocks on the side of the fixture 27. When the cylinder 5 on the support platform 131 lifts the fixture 27 downward, the V-shaped blocks on the fixture 27 gradually move into the V-shaped grooves on the guide blocks 24, thereby guiding and limiting the fixture 27.

[0033] Reference Figure 3 , the two opposite sides of the rotating platform 12 are fixed with limited arc railings 17, the center of the circle of the limited arc railings 17 is concentric with the center of the rotating platform 12, the arrangement direction of the two limited arc railings 17 is perpendicular to the arrangement direction of the two fixture fixing platforms 13, and the distance from the side of the limited arc railing 17 away from the rotating platform 12 to the center of the rotating platform 12 is greater than the distance from the side of the tooling fixture 27 on the support platform 131 away from the rotating platform 12 to the center of the rotating platform 12. Through the arrangement of the limited arc railings 17, when the rotating platform 12 drives the limited arc railings 17 to rotate, the moving track of the limited arc railings 17 can eliminate some object obstacles, so that the rotation of the entire positioner 1 is not interfered.

[0034] Reference Figure 1 and Figure 4In order to store the fixtures 27, the vertical warehouse 2 includes a storage rack 21 and a storage platform 22. The storage rack 21 is a rectangular steel structure frame and is fixed to the welding site. The storage rack 21 is located on the side of the elevator 3 away from the rotary platform 12. The storage rack 21 has an opening on the side close to the elevator 3 to facilitate the telescopic conveyor 4 to move the fixtures 27 in or out. The storage platform 22 is fixedly provided with multiple layers along the vertical direction of the storage rack 21 to facilitate the storage of tooling fixtures 27 of different models and specifications. Each layer of the storage platform 22 includes multiple groups of placement groups 221, and the multiple groups of placement groups 221 are distributed along the horizontal direction. Specifically, the arrangement direction of the multiple groups of placement groups 221 in each layer of the storage platform 22 is parallel to the arrangement direction of the positioner 1 and the storage rack 21. Each group of placement groups 221 includes multiple support rods 2211 relatively fixed on both sides of the storage rack 21. The multiple support rods 2211 correspond to each other, and there is a gap between two opposite support rods 2211 that is greater than the width of the telescopic conveyor 4 to facilitate the movement of the telescopic conveyor 4 in and out; in an embodiment of the present invention, each group of placement groups 221 includes four support rods 2211 corresponding to each other.

[0035] Reference Figure 4 and Figure 5 A positioning pin 18 is fixed to the end of one of the two corresponding support rods 2211, and a cushion block 19 is fixed to the end of the other support rod 2211. The positioning pin 18 is used to align with the fixture 27 (refer to Figure 2 ) The positioning portion of the lower surface of the fixture 27 is plugged in and matched, specifically, the positioning portion of the lower surface of the fixture 27 and the positioning pin 18 cooperate with each other and the lower surface of the fixture 27 and the positioning seat 6 (refer to Figure 3 ) The mutually cooperating positioning parts can be in the same position or in different positioning structures, which is not limited here.

[0036] When the telescopic conveyor 4 needs to place the tooling fixture 27 on the storage rack 21, the telescopic conveyor 4 and the tooling fixture 27 to be stored on the telescopic conveyor 4 are moved to the storage platform 22 of the required height through the elevator 3, and then the telescopic conveyor 4 moves the tooling fixture 27 to be stored to the four support rods 2211 of the required placement group 221, so that the positioning part on the tooling fixture 27 is aligned with the positioning pin 18, and then the elevator 3 drives the telescopic conveyor 4 and the tooling fixture 27 to move downward, so that the tooling fixture 27 is placed on the four support rods 2211 of the corresponding placement group 221, and is positioned by the plug-in cooperation between the positioning pin 18 and the tooling fixture 27 to ensure that the tooling fixture 27 does not move horizontally; then the elevator 3 continues to drive the telescopic conveyor 4 to move downward and disengage from the tooling fixture 27, and the telescopic conveyor 4 is recovered to the elevator 3 to complete the placement of the tooling fixture 27.

[0037] When the telescopic conveyor 4 needs to take out the selected tooling fixture 27 from the storage rack 21, the telescopic conveyor 4 is moved to the bottom of the storage platform 22 where the tooling fixture 27 to be installed is located by the elevator 3, and then the telescopic conveyor 4 is extended to the bottom of the tooling fixture 27 to be installed, and then the telescopic conveyor 4 is driven to rise by the elevator 3, so that the telescopic conveyor 4 lifts the selected tooling fixture 27, and the selected tooling fixture 27 is separated from the multiple support rods 2211 below, and then the selected tooling fixture 27 is moved toward the direction close to the positioner 1 by the telescopic conveyor 4, so that it is moved out of the storage rack 21, and the tooling fixture 27 can be taken out.

[0038] Reference Figure 1 and Figure 4 In order to facilitate the lifting and lowering of the telescopic conveyor 4, the elevator 3 includes a bracket 31, a lifting frame 32 and a driving source 33. The bracket 31 is fixed at the welding site and adopts a gantry. The bracket 31 is located between the positioner 1 and the vertical warehouse 2. The arrangement direction of the positioner 1 and the vertical warehouse 2 is perpendicular to the plane where the bracket 31 is located. The bracket 31 is aligned with the opening of the storage rack 21, and the lifting frame 32 is slidably arranged on the bracket 31 along the vertical direction. Specifically, guide rails that slide with the lifting frame 32 are fixed on the opposite sides of the bracket 31 to guide the sliding of the lifting frame 32; the telescopic conveyor 4 is installed in the middle of the lifting frame 32, and the driving source 33 is arranged on the bracket 31. The driving source 33 is used to drive the lifting frame 32 to drive the telescopic conveyor 4 to lift and lower.

[0039] Reference Figure 4 In order to facilitate the lifting frame 32 to drive the telescopic conveyor 4 to move, the driving source 33 includes a winch 331 and a wire rope 332. The winch 331 is installed on the bracket 31. Specifically, two winches 331 are installed on the bracket 31. The wire rope 332 corresponds to the winches 331 one by one. One end of the wire rope 332 is wound around the winch 331 and the other end is fixed to the lifting frame 32. A guide pulley block 26 is installed on the top of the bracket 31. The guide pulley block 26 corresponds to the wire rope 332 one by one. The wire rope 332 between the winch 331 and the lifting frame 32 is slidably overlapped on the corresponding guide pulley block 26. In other embodiments, the winch 331 and the wire rope 332 can be replaced by a hydraulic cylinder, an electric cylinder, etc. installed on the bracket 31. The lifting frame 32 is fixed to the piston rod of the hydraulic cylinder or the electric cylinder, and the lifting frame 32 can also be lifted and lowered.

[0040] When it is necessary to drive the telescopic conveyor 4 to rise, the winch 331 is started, the winch 331 reels in the wire rope 332, and the wire rope 332 pulls the lifting frame 32 to drive the telescopic conveyor 4 to move upward, thereby helping the telescopic conveyor 4 to move to the required height for replacing the tooling fixture 27; when it is necessary to drive the telescopic conveyor 4 to descend, the winch 331 is started, the winch 331 unwinds the wire rope 332, and under the action of the gravity of the lifting frame 32 and the telescopic conveyor 4, the lifting frame 32 and the telescopic conveyor 4 descend synchronously, thereby helping the telescopic conveyor 4 to move to the required height for replacing the tooling fixture 27.

[0041] Reference Figure 1 and Figure 4 The telescopic conveyor 4 is a telescopic fork, which is fixedly mounted in the middle of the lifting frame 32. The telescopic direction of the telescopic fork is parallel to the arrangement direction of the positioner 1 and the vertical warehouse 2. In the embodiment of the present invention, the telescopic fork is a three-stage telescopic structure. In other embodiments, a two-stage telescopic, four-stage telescopic or five-stage telescopic structure can be used as needed; the telescopic fork can be telescoped toward the positioner 1 and the vertical warehouse 2. Its specific structure and principle are prior art and will not be described in detail here. When in use, the telescopic fork helps to transport the fixture 27 by extending or shortening in the direction close to the positioner 1 or the vertical warehouse 2.

[0042] Reference Figure 3 and Figure 6 , the support block 25 on each cylinder 5 is fixed with a connecting plate 7, the connecting plate 7 is U-shaped, the connecting plate 7 extends out of the support platform 131, the end of the connecting plate 7 away from the support block 25 is located above the end of the connecting plate 7 close to the support block 25, the upper end of the connecting plate 7 is slidably connected to the limit block 8 in the horizontal direction, and the sliding direction of the limit block 8 is parallel to the arrangement direction of the two support platforms 131 in the fixture fixing platform 13, specifically, the limit block 8 and the connecting plate 7 are slidably connected by the slider and the slide groove, so that the limit block 8 can extend out of the connecting plate 7 and can not be separated from the connecting plate 7. The limit block 8 is used to abut against the side of the edge of the fixture 27 away from the cylinder 5, and an adjustment component is provided on the support platform 131, and the adjustment component is used to adjust the limit block 8 at the support platform 131 on the same side to move toward or away from the fixture 27.

[0043] Reference Figure 3 and Figure 6The distance between the upper ends of the connecting plates 7 on the two support platforms 131 and the sides thereof that are close to each other is adapted to the length of the jig 27, so that when the jig 27 is placed on the support block 25 of the cylinder 5, the jig 27 is located between the upper ends of the connecting plates 7 of the two support platforms 131, and the position of the jig 27 is limited by the upper ends of the connecting plates 7. In addition, an inclined surface is designed on the upper ends of the connecting plates 7, and the spacing between the inclined surfaces on the connecting plates 7 between the two support platforms 131 increases from bottom to top, so as to guide the jig 27 when the cylinder 5 is lifted to support the jig 27.

[0044] Reference Figure 3 and Figure 6 To facilitate the sliding adjustment of the limit block 8, the adjustment component includes a rack 9, a spring 10, a screw 14, a gear 15 and a transmission telescopic rod 16. The rack 9 is slidably arranged on the support platform 131 in the vertical direction. The rack 9 is located between the two cylinders 5 corresponding to the support platform 131. The rack 9 is used to abut against the lower surface of the tooling fixture 27. The spring 10 is movably sleeved on the rack 9. The spring 10 is located below the support platform 131. One end of the spring 10 is fixed to the bottom wall of the support platform 131, and the other end is fixed to the rack 9. The spring 10 is used to pull the rack 9 to reset. When the spring 10 is in a natural state, the upper surface of the rack 9 is higher than the upper surface of the positioning seat 6.

[0045] Reference Figure 3 and Figure 6 A support plate 20 is fixed to the bottom wall of the support platform 131, and the screw 14 is rotatably penetrated on the support plate 20. The rotation axis of the screw 14 is parallel to the sliding direction of the limit block 8 on the corresponding side. The gear 15 is coaxially fixed on the screw 14, and the rack 9 is meshed with the gear 15 on the corresponding side. The elastic force of the spring 10 is greater than the sum of the meshing friction between the gear 15 and the rack 9 and the rotation friction of the screw 14. When the spring 10 is in a natural state, the distance between the limit blocks 8 corresponding to the two support platforms 131 on one side close to each other is greater than the length of the fixture 27.

[0046] Reference Figure 3 and Figure 6The transmission telescopic rod 16 includes a first rod body 161 and a second rod body 162 slidably inserted into the first rod body 161. The sliding direction of the second rod body 162 is parallel to the telescopic direction of the cylinder 5, so that the telescopic direction of the transmission telescopic rod 16 is parallel to the telescopic direction of the cylinder 5. The second rod body 162 extends upward. The first rod body 161 and the second rod body 162 are both square rods and cannot rotate relative to each other. Specifically, the first rod body 161 is threadedly sleeved on the screw rod 14, and the end of the second rod body 162 away from the screw rod 14 is fixedly connected to the limit block 8 on the corresponding side through the support rod 23. Since the limit block 8 can only support the corresponding connecting plate 7 to slide horizontally, and the second rod body 162 is fixedly connected to the limit block 8 through the support rod 23 The second rod 162 and the first rod 161 are fixed, so that the second rod 162 and the first rod 161 can move synchronously with the corresponding limit block 8; when the screw 14 rotates, since the first rod 161 cannot rotate with the screw 14, the first rod 161 will move along the screw 14 through the threaded fit under the rotation of the screw 14; when the rack 9 moves downward, the gear 15 drives the screw 14 to rotate and drives the transmission telescopic rod 16 to move in the direction close to the fixture 27; and by designing the rotation direction of the thread on the screw 14, it can be achieved that when the rack 9 moves downward to drive the gear 15 to rotate, the threaded fit between the screw 14 and the first rod 161 makes the entire transmission telescopic rod 16 approach the fixture 27 along the axial direction of the screw 14.

[0047] When the cylinder 5 supports the selected jig 27 to move downward, the upper end of the connecting plate 7 continues to limit the left and right ends of the jig 27, and the limit block 8 does not extend out of the upper end of the connecting plate 7, which will not affect the support of the cylinder 5 to the jig 27. As the jig 27 continues to move downward, the connecting plate 7 moves downward, causing the transmission telescopic rod 16 to contract, and then the lower surface of the jig 27 abuts against the upper end of the rack 9 and gradually presses the rack 9 to move downward, so that the spring 10 is stretched, and the rack 9 moves downward to drive the corresponding gear 15 to rotate The gear 15 drives the screw rod 14 to rotate, and the rotation of the screw rod 14 drives the transmission telescopic rod 16 to slide toward the direction close to the cylinder 5. Then the transmission telescopic rod 16 drives the two limit blocks 8 on the corresponding side to approach the fixture 27, so that the limit blocks 8 abut against the side of the edge of the fixture 27 away from the cylinder 5 until the fixture 27 is plugged into the positioning seat 6. Through the setting of the limit blocks 8, the displacement of the fixture 27 in the vertical direction can be limited to ensure that the fixture 27 does not jump during use.

[0048] When the cylinder 5 needs to lift the fixture 27 to be replaced, as the fixture 27 to be replaced gradually moves upward, the connecting plate 7 moves synchronously, the transmission telescopic rod 16 extends, the abutment force of the fixture 27 on the rack 9 is reduced, and then the stretched spring 10 pulls the rack 9 upward, causing the gear 15 and the screw 14 to rotate in opposite directions, thereby driving the transmission telescopic rod 16 to drive the limit block 8 to move in the direction away from the fixture 27 until the fixture 27 is completely disengaged from the rack 9. At this time, the limit block 8 is completely disengaged from the fixture 27, making it convenient for the telescopic fork to lift and remove the fixture 27 to be replaced from the cylinder 5.

[0049] The implementation principle of the embodiment of the present invention is: when it is necessary to switch the fixture, the rotating platform 12 is driven by the rotating mechanism to drive the fixture fixing platform 13 to rotate, and the tooling fixture 27 to be replaced is moved to the alignment hoist 3, and then the multiple cylinders 5 on the support platform 131 in the corresponding fixture fixing platform 13 rise synchronously to gradually lift the tooling fixture 27 to be replaced. As the tooling fixture 27 to be replaced gradually moves upward, the abutment force of the tooling fixture 27 on the rack 9 decreases, and then the stretched spring 10 pulls the rack 9 upward to rotate the gear 15 and the screw 14, and the screw 14 drives the transmission telescopic rod 16 to drive the corresponding side limit block 8 to move in the direction away from the tooling fixture 27 until the tooling fixture 27 is completely disengaged from the rack 9, at which time the limit block 8 is completely disengaged from the tooling fixture 27.

[0050] Then, the telescopic fork is moved by the hoist 3 to align with the bottom of the tooling fixture 27 to be replaced on the positioner 1, the telescopic fork is extended in the direction of the tooling fixture 27 to be replaced, and moved to the bottom of the tooling fixture 27 to be replaced, and then the telescopic fork is raised by the hoist 3, and then the telescopic fork lifts the tooling fixture 27 to be replaced, so that the tooling fixture 27 to be replaced is separated from the support block 25 on the cylinder 5; then the telescopic fork is retracted to transport the tooling fixture 27 to the position of the hoist 3, and the hoist 3 drives the telescopic fork and the tooling fixture 27 on the telescopic fork to move to the appropriate storage platform 22 height of the storage rack 21, so that the tooling fixture 27 is higher than the height of the corresponding storage platform 22, and then the telescopic fork is retracted to move to the storage rack 21. The fork extends toward the storage rack 21, and moves the tooling fixture 27 to be replaced to above the four support rods 2211 of the required placement group 221, and the positioning parts on the tooling fixture 27 are aligned with the positioning pins 18 on the corresponding support rods 2211, and then the hoist 3 drives the telescopic fork and the tooling fixture 27 to move downward, so that the tooling fixture 27 is placed on the corresponding four support rods 2211, and the horizontal movement of the tooling fixture 27 is restricted by the mutual cooperation between the positioning pins 18 and the positioning parts on the tooling fixture 27; then the hoist 3 continues to drive the telescopic fork downward, so that the telescopic fork is separated from the tooling fixture 27, and then the telescopic fork is recovered toward the hoist 3 to realize the storage of the tooling fixture 27 to be replaced.

[0051] Then the hoist 3 moves the telescopic fork to align with the bottom of the selected work fixture 27, the telescopic fork extends toward the storage rack 21, and moves to the bottom of the work fixture 27 to be installed, and the telescopic fork is moved up by the hoist 3 to lift the selected work fixture 27, so that the work fixture 27 is separated from the corresponding four support rods 2211, and then the telescopic fork drives the selected work fixture 27 to be transported toward the hoist 3, and then the hoist 3 moves the telescopic shelf and the selected work fixture 27 to the required installation height, and then the telescopic fork is extended toward the direction of the positioner 1 to transport the selected work fixture 27 to the top of the corresponding fixture fixing platform 13, and then the cylinder 5 rises to make the support block 25 abut against the bottom of the work fixture 27 to support the work fixture 27, and then the hoist 3 drives the telescopic fork to move downward, so that the telescopic fork is separated from the work fixture 27, and then the telescopic fork is retracted to the hoist 3.

[0052] Then the cylinder 5 supports the selected jig 27 to move downward, and the supporting block 25 of the cylinder 5 drives the connecting plate 7 to move downward synchronously, and at the same time, the transmission telescopic rod 16 is retracted, and then the lower surface of the jig 27 abuts against the rack 9 and gradually presses the rack 9 to move downward, and the downward movement of the rack 9 drives the corresponding gear 15 to rotate, and the gear 15 drives the screw 14 to rotate, and the rotation of the screw 14 drives the transmission telescopic rod 16 to slide in the direction close to the cylinder 5, and then the transmission telescopic rod 16 drives the two limit blocks 8 on the corresponding side to approach the jig 27, so that the limit blocks 8 abut against the side of the jig 27 edge away from the cylinder 5 pair, until the jig 27 is plugged into the positioning seat 6. By setting the limit blocks 8, the displacement of the jig 27 in the vertical direction can be limited, and the replacement of the jig 27 is completed, which is simple and convenient, and saves manpower.

[0053] Finally, the rotary platform 12 can be rotated to move the fixture 27 to the workpiece loading position for workpiece installation, and then the rotary platform 12 is rotated to drive the fixture 27 and the workpiece to move to the welding position to perform welding operations through the welding robot.

[0054] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture switching system based on automobile welding, characterized in that: The invention comprises a positioner (1), a vertical warehouse (2), an elevator (3) and a telescopic conveyor (4); the positioner (1) is used to install a tooling fixture (27) and drive the tooling fixture (27) to move; the vertical warehouse (2) is used to store the tooling fixture (27); the elevator (3) is located between the positioner (1) and the vertical warehouse (2); the telescopic conveyor (4) is arranged on the elevator (3); the elevator (3) is used to drive the telescopic conveyor (4) to rise and fall; the telescopic direction of the telescopic conveyor (4) is parallel to the arrangement direction of the positioner (1) and the vertical warehouse (2); the telescopic conveyor (4) is used to transport the tooling fixture (27) in a direction close to the positioner (1) or the vertical warehouse (2).

2. According to claim 1, a fixture switching system based on automobile welding is characterized in that: The positioner (1) comprises a base (11), a rotating platform (12), a fixture fixing platform (13) and a rotating mechanism. The rotating platform (12) is arranged on the base (11) to rotate in a vertical direction. A plurality of fixture fixing platforms (13) are arranged. The plurality of fixture fixing platforms (13) are arranged on the rotating platform (12). The fixture fixing platform (13) is used to place a tooling fixture (27). The rotating mechanism is arranged on the base (11) and is used to drive the rotating platform (12) to rotate.

3. The fixture switching system based on automobile welding according to claim 2 is characterized in that: Each of the fixture fixing platforms (13) comprises two support platforms (131) arranged relatively on the rotary platform (12), and each of the support platforms (131) is mounted with a cylinder (5) and a positioning seat (6), wherein the extension direction of the cylinder (5) is parallel to the vertical direction, and the positioning seat (6) is used to cooperate with the positioning structure on the lower surface of the tooling fixture (27).

4. The fixture switching system based on automobile welding according to claim 3 is characterized in that: A connecting plate (7) is provided on the piston rod of the cylinder (5), a limit block (8) is provided on the connecting plate (7) for sliding in the horizontal direction, the limit block (8) is used to abut against a side of the edge of the fixture (27) away from the cylinder (5), and an adjustment component is provided on the support platform (131) for adjusting the limit block (8) to move in a direction close to or away from the fixture (27).

5. The fixture switching system based on automobile welding according to claim 4 is characterized in that: The adjustment component comprises a rack (9) slidably arranged on a support platform (131), a spring (10) arranged on the support platform (131), a screw (14) rotatably arranged on the support platform (131), a gear (15) coaxially sleeved on the screw (14) and a transmission telescopic rod (16) threadedly sleeved on the screw (14), the rack (9) being slidably arranged in a vertical direction, the rack (9) being used to abut against the lower surface of a fixture (27), the end of the spring (10) away from the support platform (131) being arranged on the rack (9), the spring (10) being used to pull the rack (9) to reset, the rotation axis of the screw (14) being parallel to the corresponding support platform (131) In the sliding direction of the limit block (8) on one side of the support platform (131), the rack (9) meshes with the gear (15) on the corresponding side, the elastic force of the spring (10) is greater than the sum of the meshing friction between the gear (15) and the rack (9) and the rotational friction of the screw (14), the telescopic direction of the transmission telescopic rod (16) is parallel to the telescopic direction of the cylinder (5), and the end of the transmission telescopic rod (16) away from the screw (14) is connected to the limit block (8) on the corresponding side through a support rod (23), and when the rack (9) moves downward, the gear (15) drives the screw (14) to rotate and drives the transmission telescopic rod (16) to move in a direction close to the fixture (27).

6. The fixture switching system based on automobile welding according to claim 2 is characterized in that: A limited arc-shaped guardrail (17) is arranged on the rotating platform (12), the center of which is concentric with the center of the rotating platform (12), and the distance from the side of the limited arc-shaped guardrail (17) away from the center of the rotating platform (12) to the center of the rotating platform (12) is greater than the distance from the side of the tooling fixture (27) located on the fixture fixing platform (13) away from the center of the rotating platform (12) to the center of the rotating platform (12).

7. The fixture switching system based on automobile welding according to claim 1 is characterized in that: The vertical warehouse (2) comprises a storage rack (21) and a storage platform (22), wherein the storage platform (22) is provided with multiple layers along the vertical direction of the storage rack (21), and each layer of the storage platform (22) comprises multiple groups of placement groups (221), and each group of the placement groups (221) comprises multiple support rods (2211) arranged relatively on the storage rack (21).

8. The fixture switching system based on automobile welding according to claim 7 is characterized in that: A positioning pin (18) is provided on one side of the support rod (2211) of each placement group (221), and a cushion block (19) is provided on the other side of the support rod (2211), wherein the positioning pin (18) is used to be plugged into and matched with a positioning structure on the lower surface of a fixture (27).

9. A fixture switching system based on automobile welding according to any one of claims 1 to 8, characterized in that: The elevator (3) comprises a support (31), a lifting frame (32) slidably arranged on the support (31), and a driving source (33) arranged on the support (31); the lifting frame (32) is slidably arranged on the support (31) in a vertical direction; the telescopic conveyor (4) is arranged on the lifting frame (32); and the driving source (33) is used to drive the lifting frame (32) to drive the telescopic conveyor (4) to move up and down.

10. The fixture switching system based on automobile welding according to claim 9, characterized in that: The telescopic conveyor (4) is a telescopic fork, and the telescopic fork is arranged on a lifting frame (32). The telescopic direction of the telescopic fork is parallel to the arrangement direction of the positioner (1) and the vertical warehouse (2).

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