Adaptive clamping device for welding fixation

Abstract

The invention relates to the technical field of welding machining, in particular to an adaptive clamping device for welding fixation, which comprises a base, a deflection assembly, a propelling assembly, an adjusting assembly, a folding assembly and a switching assembly, the deflection assembly is used for driving a movable clamping arm to rotate to be close to or far away from a fixed clamping arm, and the adjusting assembly is used for driving a clamping jaw to rotate to different directions; the folding assembly is used for driving the multiple fingers in the same clamping jaw to rotate to be close to or away from each other. The switching assembly is used for driving the two adjacent clamping jaws in the same clamping arm to rotate to be close to or away from each other. Through cooperation of the adjusting assembly and the deflection assembly, the included angle between the two extending plates can be adjusted, meanwhile, the position state of the adjusting assembly is correspondingly switched, and when the U-shaped plate is in the vertical state, auxiliary fixing can be conveniently conducted on the steel column in the vertical state; when the U-shaped plate is vertically horizontal, the scattered steel columns can be conveniently subjected to auxiliary fixing of prefabricated welding on the ground, and auxiliary fixing of horizontal and vertical welding of the steel columns is achieved.

Description

Technical Field

[0001] This invention relates to the field of welding processing technology, and in particular to an adaptive clamping device for welding fixation. Background Technology

[0002] Light steel structures use lightweight steel frame materials as the load-bearing framework, combined with floor slabs, roof panels, and wall panels to form the entire building. Steel columns are the main load-bearing support structure of light steel structures. During construction, steel columns need to be welded together according to the drawings to form a steel frame. During the welding process, auxiliary machinery is needed to fix and position the steel columns to facilitate the welding process.

[0003] A search revealed that Chinese patent CN220006496U discloses a steel column welding and fixing auxiliary device, including a first base frame, a top seat fixedly connected to the top of the first base frame, a sliding groove on the top surface of the top seat, a first sliding column inside the sliding groove, and a clamping ring fixedly connected to the top of the first sliding column; a movable shaft mounted on the right side surface of the first base frame, a second base frame mounted on the right side surface of the movable shaft, and a first connecting block fixedly connected to the back of the first base frame. By connecting and fixing the first connecting block and the second connecting block, parallel welding of the steel column can be achieved. When performing vertical welding, by rotating the movable shaft and then making the angle between the first base frame and the second base frame perpendicular, vertical welding of the steel column can be performed. This allows for welding of the steel column in multiple directions and has a strong adjustment effect. However, the above technical solution still has the following shortcomings in implementation: Limited functionality: During the construction of light steel buildings, it is not only about the prefabrication and welding of steel columns on the ground, but also the longitudinal welding between longitudinal beams. One longitudinal beam needs to be welded to the end of another longitudinal beam. At this time, the longitudinal beam is in an upright state, which makes it inconvenient to provide auxiliary fixation for the two steel columns. (2) Poor adaptability: In light steel buildings, not only square steel is used, but also round steel is used. For steel columns of different shapes, it is not easy to make targeted and effective positioning, which makes the device less applicable to positioning steel columns of different shapes. (3) Insufficient stability: Since the steel columns in the light steel building are of different sizes, it is not convenient to adjust according to the size of the steel column when assisting in fixing. This makes the device unstable when assisting in fixing steel columns of different sizes, and it is easy to shake during the welding process, which reduces the stability of the auxiliary fixing. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the problems of single functionality, poor adaptability and insufficient stability of the fixing structure when welding steel columns in the prior art, an adaptive clamping device for welding fixing is provided.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an adaptive clamping device for welding and fixing, comprising: A base on which two clamping arms are mounted to cooperate with each other. Each clamping arm includes multiple clamping jaws, and each clamping jaw includes multiple fingers. One of the two clamping arms is a movable clamping arm that is hinged to the base, and the other is a fixed clamping arm. A deflection assembly is used to drive the movable clamping arm to rotate closer to or away from the fixed clamping arm; A propulsion component is used to move the gripper closer to or away from the object to be gripped. An adjustment component is used to rotate the gripper to different positions; The retracting component is used to rotate multiple fingers in the same gripper to move closer or further apart; The switching component is used to drive two adjacent grippers in the same gripper arm to rotate closer or further apart, and cooperates with the retracting component to clamp different shaped objects.

[0006] Furthermore, the propulsion assembly includes a rotary drive, a drive wheel connected to the output end of the rotary drive, a driven wheel meshing with the drive wheel, a worm fixed to the driven wheel, a worm wheel meshing with the worm, a main pulley fixed to the worm wheel, a driven pulley, a synchronous belt wound around the main pulley and the driven pulley, a main turntable coaxially fixed to the driven pulley, a pull rod mounted on the outer edge of the main turntable, a driven turntable mounted on the end of the pull rod opposite to the main turntable, a threaded cylinder fixed to the driven turntable and having internal threads, and a threaded rod threadedly connected inside the threaded cylinder and undergoing linear displacement during the rotation of the threaded cylinder, wherein the threaded rod is connected to a clamp for mounting the grippers.

[0007] Furthermore, the adjustment assembly includes a connecting seat connected to the threaded rod, a rotating ring fixedly connected to the middle of the connecting seat, a U-shaped plate sleeved on the outside of the rotating ring and connected to the clamp, a rotating rod rotatably disposed inside the rotating ring, and a top rod slidably mounted on the rotating rod. The rotating ring has several openings, and the inner peripheral wall of the U-shaped plate has several positioning holes. When the rotating rod rotates, it can drive the top rod to enter or leave the positioning holes from the openings to fix the U-shaped plate in different positions.

[0008] Furthermore, the rotary rod has several arc-shaped grooves, each corresponding to a number of push rods. Each push rod includes a sliding part slidably connected in the arc-shaped groove and a switching part slidably connected in the through-hole. The arc-shaped groove has a first position and a second position along its extension direction. When the sliding part moves from the first position to the second position, the switching part enters the positioning hole from the through-hole.

[0009] Furthermore, the deflection assembly includes a plurality of first locking holes formed on the base, a second locking hole formed on the movable clamping arm, and a pin for inserting into the second locking holes and the first locking holes at different positions to lock the movable clamping arm at different positions on the base.

[0010] Furthermore, the worm gear is inserted into the clamping arm, and the base has a slide rail for the worm gear to slide to limit the rotation trajectory of the moving clamping arm.

[0011] Furthermore, the switching assembly includes a strip plate, a bidirectional lead screw installed inside the strip plate, a slide mounted on different threaded sections of the bidirectional lead screw, a linkage rod hinged between the slide and the clamp to drive the gripper to swing, a first bevel gear installed at the end of the bidirectional lead screw, a second bevel gear meshing with the first bevel gear, a spur gear coaxially fixed with the second bevel gear, and a rack meshing with the spur gear. The rack is slidably installed inside the strip plate, and the clamp is hinged to the end of the rack.

[0012] Furthermore, in each gripper, the one located in the middle is the central gripper, and the rest are side grippers. The retracting assembly includes an I-shaped rod slidably mounted on the gripper, a side rod hinged between the I-shaped rod and the side grippers, and a locking mechanism for locking the I-shaped rod in different positions of the gripper.

[0013] Furthermore, the locking mechanism includes a plurality of spaced positioning slots formed on the clamp, a positioning block for embedding in the positioning slots, and an elastic element installed between the positioning block and the I-shaped rod.

[0014] Furthermore, the locking mechanism also includes a guide cylinder sleeved outside the elastic element, one end of which is fixed to the I-shaped rod, and the other end is open for the positioning block to extend into.

[0015] The beneficial effects of this invention are: 1. By adjusting the combination of the adjustment component and the deflection component, the angle between the two clamping arms can be adjusted. At the same time, the position state of the component can be switched accordingly. When the U-shaped plate is in the vertical state, it is convenient to assist in fixing the upright steel column. When the U-shaped plate is in the horizontal state, it is convenient to assist in fixing the scattered steel columns to the ground for prefabrication welding. This achieves the auxiliary fixing of horizontal and vertical welding of steel columns. 2. By setting up a propulsion component, the drive of the motor and the transmission of the drive wheel, driven wheel, worm, worm gear and other structures drive the threaded cylinder to rotate. At the same time, under the limiting action of the positioning rod, the threaded rod will move linearly, which can push the gathering component to approach and clamp the steel column, which is convenient for auxiliary fixing of steel columns of different sizes and improves the stability of the auxiliary fixing of the device. 3. By setting a switching component, the rocker arm is turned to drive the bidirectional lead screw to rotate. Under the transmission of bevel gear and spur gear, the rack can be driven to move. At the same time, the slide moves along the bidirectional lead screw, which will drive the linkage rod to deflect, and then pull the retracting component to deflect. This allows the device to not only assist in fixing square steel columns, but also to assist in fixing round steel columns, thus improving the adaptability of the device. 4. By setting up a folding component, the I-shaped rod is positioned by sliding in the groove and by the positioning block and positioning groove. During the movement of the I-shaped rod, the side rod pushes the side finger to rotate around the hinge with the front finger, so that the three fingers change from a parallel state to an inclined state, which makes it easier to fix circular steel columns of different sizes. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a first-view structural schematic diagram of an adaptive clamping device for welding and fixing proposed in this invention. Figure 2 This is a second-view structural schematic diagram of an adaptive clamping device for welding and fixing proposed in this invention. Figure 3 This is a schematic diagram of the propulsion component structure of an adaptive clamping device for welding and fixing proposed in this invention; Figure 4 This is a schematic diagram of the connection structure between the propulsion component and the adjustment component of an adaptive clamping device for welding and fixing proposed in this invention (the rotating ring of the adjustment component is separated from the U-shaped plate for clarity). Figure 5 For the present invention Figure 4 Enlarged view of point A in the image; Figure 6 This is a schematic diagram of the adjustment component structure of an adaptive clamping device for welding fixation proposed in this invention; Figure 7 This is a schematic diagram of the switching component structure of an adaptive clamping device for welding and fixing proposed in this invention; Figure 8 For the present invention Figure 6 Enlarged view of point B in the image; Figure 9 This is a first-view structural schematic diagram of the folding assembly of an adaptive clamping device for welding and fixing proposed in this invention. Figure 10 This is a second-view structural diagram of the retractable assembly of an adaptive clamping device for welding and fixing proposed in this invention. Figure 11 This is a schematic diagram of the I-shaped rod structure of an adaptive clamping device for welding and fixing proposed in this invention; Figure 12 This is a schematic diagram of the deflection assembly structure of an adaptive clamping device for welding and fixing proposed in this invention.

[0018] In the picture: 1. Base; 2. Base frame; 3. Clamping arm; 3a. Movable clamping arm; 3b. Fixed clamping arm; 301. Extension plate; 302. Vertical plate; 303. Clamping seat; 304. Positive finger; 305. Lateral finger; 4. Deflection assembly; 401. Pin; 402. First locking hole; 403. Second locking hole; 404. Slide rail; 405. Slide cavity; 5. Propulsion assembly; 501. Rotary drive component; 502. Drive wheel; 503. Worm gear; 504. Driven wheel; 505. Worm wheel; 506. Main pulley; 507. Driven pulley; 508. Main turntable; 509. Tie rod; 510. Driven turntable; 511. Threaded cylinder; 512. Threaded rod; 513. Positioning rod; 6. Adjustment assembly; 601. Connecting seat; 602. U-shaped plate; 603. Rotary ring; 604. Rotary rod; 605. Arc groove; 606. Top rod; 607. Through port; 608. Positioning hole; 7. Switching assembly; 701. Strip plate; 702. Two-way lead screw; 703. First bevel gear; 704. Center rod; 705. Second bevel gear; 706. Spur gear; 707. Rack; 708. Rocker arm; 709. Slide block; 710. Linkage rod; 8. Retractable assembly; 801. I-shaped rod; 802. Side rod; 803. Slide groove; 804. Positioning groove; 805. Guide cylinder; 806. Elastic element; 807. Positioning block. Detailed Implementation

[0019] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and directions and references, such as up, down, left, right, etc., are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0020] Reference Figure 1 and Figure 2 The present invention is an adaptive clamping device for welding and fixing, comprising: The base 1 has two clamping arms 3 that cooperate with each other. The two clamping arms 3 cooperate to clamp the object to be clamped (such as a steel column). Each clamping arm 3 includes multiple jaws to improve the clamping force. The multiple jaws can be arranged linearly or in an array, and each jaw includes multiple fingers. One of the two clamping arms 3 is a movable clamping arm 3a that is hinged to the base 1, and the other is a fixed clamping arm 3b. The deflection component 4 is used to drive the movable clamping arm 3a to rotate closer to or further away from the fixed clamping arm 3b, thereby adjusting the angle between the two clamping arms 3 and clamping parts of different sizes. Figure 1 The moving clamping arm 3a is parallel to the fixed clamping arm 3b. Figure 2 The moving clamping arm 3a gradually moves closer to the fixed clamping arm 3b; The propulsion component 5 is used to move the gripper closer to or away from the object to be gripped; Adjustment component 6 is used to switch the gripper to different positions, which can be horizontal, vertical, or other positions between horizontal and vertical. When it is in the vertical state, it is convenient to assist in fixing the vertical steel column. When it is in the horizontal state, it is convenient to assist in fixing the scattered steel columns to the ground for prefabrication welding, thereby realizing the auxiliary fixing of horizontal and vertical welding of steel columns. The retracting component 8 is used to rotate multiple fingers in the same gripper to move closer or further away. When the multiple fingers are arranged in parallel, they can grip a square steel column. When the multiple fingers are retracted into an inclined state, they can assist in fixing round steel columns of different sizes. The switching component 7 is used to drive two adjacent grippers in the same gripper arm 3 to rotate closer or further apart, and cooperates with the retracting component 8 to clamp different shaped objects to be clamped.

[0021] In some examples, refer to Figure 3 and Figure 4The propulsion assembly 5 includes a rotary drive 501, a drive wheel 502 connected to the output end of the rotary drive 501, a driven wheel 504 meshing with the drive wheel 502, a worm gear 503 fixed to the driven wheel 504, a worm wheel 505 meshing with the worm gear 503, a main pulley 506 fixed to the worm wheel 505, a driven pulley 507, a synchronous belt wound around the main pulley 506 and the driven pulley 507, a main turntable 508 coaxially fixed to the driven pulley 507, a pull rod 509 mounted on the outer edge of the main turntable 508, and a driven turntable 510 mounted on the end of the pull rod 509 opposite to the main turntable 508. The system includes a threaded cylinder 511 fixed to the turntable 510 and having internal threads, and a threaded rod 512 threadedly connected inside the threaded cylinder 511 and linearly displaced during the rotation of the threaded cylinder 511. The threaded rod 512 is connected to a clamping seat 303 for mounting the grippers. The first rotary drive component 501 can be a motor, which is mounted on the base 1. The clamping arm 3 also includes a horizontally arranged extension plate 301 and a vertically arranged vertical plate 302. The timing belt is located inside the extension plate 301. The vertical plate 302 is for mounting the threaded cylinder 511, and a positioning rod 513 is inserted on the vertical plate 302. The bottom of the extension plate 301 is provided with a base frame 2, and the height of the base frame 2 is adjustable. The rotary drive 501 drives the drive wheel 502 to rotate and drives the driven wheel 504 to rotate. The driven wheel 504 drives the worm gear 503 to rotate synchronously and drives the worm wheel 505 to rotate. The main pulley 506 rotates accordingly and drives the driven pulley 507 to rotate through the synchronous belt. At the same time, it drives the main turntable 508 to rotate. The pull rod 509 rotates around the center of the main turntable 508 and pulls the driven turntable 510 to rotate. During the rotation of the driven turntable 510, it drives the threaded cylinder 511 to rotate. Due to the limitation of the positioning rod 513, the rotation of the threaded cylinder 511 drives the threaded rod 512 to move linearly, which can push the clamping seat 303 at the end of the threaded rod 512 to approach or move away from the workpiece to be clamped, thereby clamping or releasing the workpiece to be clamped.

[0022] In some examples, refer to Figures 4-6 The adjusting assembly 6 includes a connecting seat 601 connected to the threaded rod 512, a rotating ring 603 fixedly connected to the middle of the connecting seat 601, a U-shaped plate 602 sleeved on the outside of the rotating ring 603 and connected to the clamp 303, a rotating rod 604 rotatably disposed inside the rotating ring 603, and a top rod 606 slidably mounted on the rotating rod 604. The rotating ring 603 has several openings 607, and the inner peripheral wall of the U-shaped plate 602 has several positioning holes 608. When the rotating rod 604 rotates, it can drive the top rod 606 to enter the positioning hole 608 from the opening 607 or disengage from the positioning hole 608 to fix the U-shaped plate 602 in different positions. The through-hole 607 is located inside the positioning hole 608, and several through-holes 607 correspond one-to-one with several push rods 606. The number of positioning holes 608 is greater than the number of through-holes 607. In this embodiment, there are two through-holes 607 and four positioning holes 608. The rotating rod 604 can be rotated by a knob, and its rotation can be converted into linear motion of the push rod 606 in the radial direction. When the rotating rod 604 is rotated in the first direction, it drives the push rod 606 to move outward and enter the corresponding positioning hole 608 from the through-hole 607. At this time, the push rod 606 will rotate. When the rotating rod 604 is rotated in the second direction opposite to the first direction, the top rod 606 moves inward and retracts from the positioning hole 608 into the through hole 607. At this time, the rotating ring 603 and the U-shaped plate 602 are unlocked, and the U-shaped plate 602 can rotate around the rotating ring 603 to switch between the horizontal and vertical states. While ensuring that the vertical plate 302 and other structures remain stationary, the angle rotation of some structures is achieved, so that the device can meet the auxiliary fixing requirements for horizontal and vertical welding of steel columns, demonstrating the multi-functionality of the device.

[0023] In some examples, the rotary rod 604 has several arc-shaped grooves 605, which correspond one-to-one with several push rods 606. Each push rod 606 includes a sliding part slidably connected in the arc-shaped groove 605 and a switching part slidably connected in the through-hole 607. The arc-shaped groove 605 has at least a first position and a second position along its extension direction. The first position and the second position have a height difference in the radial direction. When the rotary rod 604 rotates, the sliding part located in the arc-shaped groove 605 moves from the first position to the second position. At this time, the switching part moves radially outward to enter the positioning hole 608 from the through-hole 607 to lock the position of the rotating ring 603 and the U-shaped plate 602.

[0024] In some examples, the deflection assembly 4 includes a plurality of first locking holes 402 formed on the base 1, a second locking hole 403 formed on the movable clamping arm 3a, and a pin 401 for inserting into the second locking hole 403 and the first locking holes 402 at different positions to lock the movable clamping arm 3a at different positions on the base 1. The base 1 is provided with a sliding cavity 405 into which the end of the extension plate 301 of the clamping arm 3 extends and rotates. The plurality of first locking holes 402 are distributed at intervals along the circumference of the base 1. During operation, the pin 401 is pulled out from the first locking hole 402 and the second locking hole 403, and then the extension plate 301 of the clamping arm 3a is pushed to rotate in the sliding cavity 405. After rotating to a predetermined angle, the pin 401 is inserted into the corresponding first locking hole 402 and the second locking hole 403 to fix the movable clamping arm 3a.

[0025] In some examples, the worm gear 503 is inserted into the movable clamping arm 3a, and the base 1 has a slide rail 404 for the worm gear 503 to slide to limit the rotation trajectory of the movable clamping arm 3a. The slide rail 404 has an arc-shaped structure. When the movable clamping arm 3a is pushed to rotate, the extension plate 301 can only rotate around the center of the base 1 through the cooperation of the worm gear 503 and the slide rail 404. Preferably, the base 1 has a circular structure.

[0026] In some examples, refer to Figures 7-9 The switching assembly 7 includes a strip plate 701, a bidirectional lead screw 702 installed inside the strip plate 701, a slide block 709 installed on different threaded sections of the bidirectional lead screw 702, a linkage rod 710 hinged between the slide block 709 and the clamp 303, a first bevel gear 703 installed at the end of the bidirectional lead screw 702, a second bevel gear 705 meshing with the first bevel gear 703, a spur gear 706 coaxially fixed with the second bevel gear 705, and a rack 707 meshing with the spur gear 706. The rack 707 is slidably installed inside the strip plate 701 and the clamp 303 is hinged to the end of the rack 707. The strip plate 701 is fixedly connected to the U-shaped plate 602. Two clamps 303 are installed on each strip plate 701. The second bevel gear 705 and the spur gear 706 are connected by a central rod 704. A drive mechanism is installed at the end of the bidirectional lead screw 702, which may be, but is not limited to, a rocker arm 708 or a motor, etc. Rotating the rocker arm 708 drives the bidirectional lead screw 702 to rotate. The rotation of the first bevel gear 703 simultaneously drives the second bevel gear 705 to rotate. Through the transmission of the central rod 704, the spur gear 706 is driven to rotate. During the rotation of the spur gear 706, the rack 707 is driven to move linearly along the direction perpendicular to the strip plate 701, which in turn pushes the clamp 303 forward. At the same time, the slide 709 slides along the bidirectional lead screw 702 as it rotates, which in turn drives the linkage rod 710 to deflect. Under the limit of the linkage rod 710, the clamp 303 rotates during the forward movement. The two grippers can rotate to move closer or further apart, so that the device can not only assist in fixing square steel columns, but also assist in fixing round steel columns, thus improving the adaptability of the device.

[0027] In some examples, refer to Figures 9-11Each gripper has a central finger 304, which is fixedly connected to the gripper base 303. The remaining fingers are side fingers 305. Both the central finger 304 and the side fingers 305 are plate-shaped structures. The retracting assembly 8 includes an I-shaped rod 801 slidably mounted on the gripper base 303, a side rod 802 hinged between the I-shaped rod 801 and the side fingers 305, and a locking mechanism for locking the I-shaped rod 801 at different positions on the gripper base 303. The gripper base 303 has a groove 803 for the I-shaped rod 801 to slide. First, the locking mechanism unlocks the I-shaped rod 801, pushes the I-shaped rod 801 to slide on the gripper base 303, and drives the side rod 802 to push the side fingers 305 to rotate around the hinged part with the central finger 304, so that the side fingers 305 on both sides retract towards the central gripper plate, so that the two fingers change from a parallel state to an inclined state, which makes it easier to assist in fixing circular steel columns of different sizes. After adjustment, the locking mechanism locks the I-shaped rod 801.

[0028] In some examples, the locking mechanism includes a plurality of spaced positioning slots 804 formed on the clamp 303, a positioning block 807 for embedding in the positioning slots 804, and an elastic element 806 installed between the positioning block 807 and the I-shaped rod 801, wherein the elastic element 806 may be a spring. When the positioning block 807 is pulled out of the positioning groove 804, the I-shaped rod 801 can slide freely in the clamp 303. At this time, the I-shaped rod 801 is in the unlocked state. When the I-shaped rod 801 slides to the predetermined position, the positioning block 807 is released, and it is locked into the corresponding positioning groove 804 under the elastic force of the elastic element 806. At this time, the I-shaped rod 801 is locked in this position.

[0029] In some examples, the locking mechanism further includes a guide cylinder 805 sleeved outside the elastic element 806. One end of the guide cylinder 805 is fixed to the bottom of the I-shaped rod 801, and the other end is open to allow the positioning block 807 to extend into it. The positioning block 807 includes a guide section extending into the guide cylinder 805 and a positioning section protruding radially from the end of the guide section. One end of the elastic element 806 abuts against the bottom of the guide cylinder 805, and the other end abuts against the guide section. A limiting step is provided between the guide section and the opening of the guide cylinder 805 to restrict the guide section from sliding out of the guide cylinder 805.

[0030] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A welding fixture adaptive clamping device, characterized by: The utility model relates to a kind of clamping devices, comprising: Base (1), two clamping arms (3) are installed on it, each clamping arm (3) includes multiple clamping claws, and each clamping claw includes multiple fingers, one of two clamping arms (3) is articulated with the base (1) dynamic clamping arm (3a), the other is fixed clamping arm (3b); Deflection assembly (4) is used to drive the dynamic clamping arm (3a) to rotate close to or away from the fixed clamping arm (3b); Propelling assembly (5) is used to drive the clamping claw to close to or away from the to-be-clamped piece; Adjusting assembly (6) is used to drive the clamping claw to rotate to different directions; Folding assembly (8) is used to drive multiple fingers in the same clamping claw to rotate close to or away from each other; And switching assembly (7) is used to drive two adjacent clamping claws in the same clamping arm (3) to rotate close to or away from each other, and cooperate with the folding assembly (8) to clamp different shapes of to-be-clamped pieces.

2. A welding fixture according to claim 1, wherein: The propelling assembly (5) includes a rotary drive (501), a driving wheel (502) connected to the output end of the rotary drive (501), a driven wheel (504) engaged with the driving wheel (502), a worm (503) fixed with the driven wheel (504), a worm gear (505) engaged with the worm (503), a main pulley (506) fixed with the worm gear (505), a follower pulley (507), a synchronous belt wound around the main pulley (506) and the follower pulley (507), a main turntable (508) coaxially fixed with the follower pulley (507), a pull rod (509) installed on the outer edge of the main turntable (508), a follower turntable (510) installed on the end of the pull rod (509) away from the main turntable (508), a threaded cylinder (511) fixed with the follower turntable (510) and having internal threads, and a threaded rod (512) threadedly connected inside the threaded cylinder (511) and linearly displaced during rotation of the threaded cylinder (511), the threaded rod (512) being connected with a clamping seat (303) for mounting the clamping claw.

3. A welding fixture according to claim 2, wherein: The adjusting assembly (6) includes a connecting seat (601) connected with the threaded rod (512), a swivel ring (603) fixedly connected in the middle of the connecting seat (601), a U-shaped plate (602) sleeved outside the swivel ring (603) and connected with the clamping seat (303), a rotating rod (604) rotatably arranged inside the swivel ring (603), and a top rod (606) slidingly installed on the rotating rod (604), the swivel ring (603) is provided with a plurality of through openings (607), the inner circumferential wall of the U-shaped plate (602) is provided with a plurality of positioning holes (608), and when the rotating rod (604) rotates, the top rod (606) can be driven to enter the positioning hole (608) from the through opening (607) or be separated from the positioning hole (608) to fix the U-shaped plate (602) at different directions.

4. The adaptive clamping device for welding fixation according to claim 3, characterized in that: The rotating rod (604) is provided with a plurality of arc-shaped grooves (605), and the plurality of arc-shaped grooves (605) correspond to a plurality of jacks (606) one by one. Each jack (606) comprises a sliding part slidingly connected in the arc-shaped groove (605) and a switching part slidingly connected in the through hole (607). The arc-shaped groove (605) has a first position and a second position along its extension direction. When the sliding part moves from the first position to the second position, the switching part enters the positioning hole (608) from the through hole (607).

5. The adaptive clamping device for welding fixation according to claim 2, characterized in that: The deflection assembly (4) comprises a plurality of first lock holes (402) formed in the base (1), a second lock hole (403) formed in the movable clamping arm (3a), and a pin (401) for inserting the second lock hole (403) and the first lock hole (402) at different positions to lock the movable clamping arm (3a) at different positions of the base (1).

6. A welding fixture according to claim 5, wherein: The worm (503) is inserted into the clamping arm (3), and the base (1) is provided with a slide (404) for the worm (503) to slide to define the rotation track of the movable clamping arm (3a).

7. The adaptive clamping device for welding fixation according to claim 1, characterized in that: The switching assembly (7) comprises a strip-shaped plate (701), a bidirectional screw rod (702) installed inside the strip-shaped plate (701), a sliding seat (709) installed on different threaded segments of the bidirectional screw rod (702), a linkage rod (710) hingedly arranged between the sliding seat (709) and the clamping seat (303), a first bevel gear (703) installed at the end of the bidirectional screw rod (702), a second bevel gear (705) meshing with the first bevel gear (703), a spur gear (706) coaxially fixed with the second bevel gear (705), and a rack (707) meshing with the spur gear (706). The rack (707) is slidingly installed inside the strip-shaped plate (701), and the clamping seat (303) is hingedly connected with the end of the rack (707).

8. The adaptive clamping device for welding fixation according to claim 1, characterized in that: The middle part of each clamping jaw is a positive finger (304), and the rest are side fingers (305). The closing assembly (8) comprises an I-shaped rod (801) slidingly installed on the clamping seat (303), a side rod (802) hingedly arranged between the I-shaped rod (801) and the side finger (305), and a locking mechanism for locking the I-shaped rod (801) at different positions of the clamping seat (303).

9. The adaptive clamping device for welding fixation according to claim 8, characterized in that: The locking mechanism comprises a plurality of spaced positioning grooves (804) formed in the clamping seat (303), a positioning block (807) for embedding in the positioning groove (804), and an elastic element (806) installed between the positioning block (807) and the I-shaped rod (801).

10. The adaptive clamping device for welding fixation according to claim 9, characterized in that: The locking mechanism further comprises a guide cylinder (805) sleeved outside the elastic element (806), one end of the guide cylinder (805) being fixed with the I-shaped rod (801), and the other end being open for the positioning block (807) to extend into.

Images