Positioning tool for mobile carriage welding

Abstract

This invention relates to the field of carriage positioning devices, specifically a positioning fixture for welding a mobile carriage. It includes a body with a groove in the middle. A placement plate is slidably connected inside the groove, allowing workpieces to fall into it for temporary placement, preventing welding from being performed before proper positioning. The placement plate supports the workpiece. This positioning fixture for welding a mobile carriage utilizes the cooperation between a positioning component and a lifting component. After the workpiece falls into the groove, the lifting component lifts the placement plate, causing the workpiece to detach from the groove. Then, the positioning component locks the workpiece in place, allowing welding to proceed. This prevents welding from being performed before proper positioning, avoiding welding deformation and dimensional deviations. Simultaneously, a locking component locks the placement plate. The lifting component can only return to its original position when the slider moves back and the locking component is released, eliminating operational errors during the unloading process and increasing the device's applicability.

Description

Technical Field

[0001] This invention relates to the field of carriage positioning device technology, specifically a positioning fixture for welding movable carriages. Background Technology

[0002] As is well known, mobile carriages are mostly long and narrow rectangular frame structures, widely used in conveying, lifting and warehousing equipment. They have a large overall slenderness ratio and weak structural rigidity. The welding forming accuracy directly determines the operational stability of the equipment. These types of workpieces have extremely high requirements for welding clamping. Welding operations can only be carried out after the workpiece is fully positioned and its posture is stable. However, the traditional mobile carriage welding positioning fixtures have defects. The fixtures do not have mechanical timing interlocking mechanisms inside, and there are no rigid work process constraints. They cannot enforce control over the work process, which makes it easy for violations such as welding to be carried out before positioning is completed, resulting in welding quality defects and failing to meet the requirements of standardized high-precision production.

[0003] Existing traditional positioning fixtures lack any mechanical interlocking or limiting mechanisms in their various operations. Positioning and welding operations are independent and unrestricted, with the entire process relying entirely on subjective control based on human experience. In actual production, operators are highly prone to oversights and misjudgments in timing. Welding may commence prematurely when the workpiece is not fully positioned and locked, its posture is not properly corrected, or its clamping state is unstable. Such non-standard operations are frequent errors and are a major cause of workpiece welding failures. Furthermore, due to the lack of mandatory mechanical interlocking protection, the fixtures cannot structurally prevent welding operations in substandard states. Welding directly on workpieces in unstable states such as offset, unfixed, or skewed postures can directly cause quality problems such as out-of-tolerance dimensions, frame distortion, and weld misalignment. Traditional fixtures rely solely on manual supervision to mitigate risks, but manual control is highly random and limited, making it difficult to achieve full-time, full-process rigid protection. This results in large quality fluctuations, low product qualification rates, and extremely poor production stability during mass production.

[0004] In summary, existing mobile carriage welding positioning fixtures generally lack mechanical timing interlocking structures, have no rigid process control capabilities, and cannot prevent illegal operations such as welding before the workpiece is properly positioned. They rely entirely on manual control of the work process, resulting in extremely high risks of misoperation and poor product quality stability. Summary of the Invention

[0005] In order to overcome the problem that existing positioning fixtures for welding mobile carriages are prone to welding before proper positioning, the present invention provides a positioning fixture for welding mobile carriages that can prevent welding misoperation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for welding a movable slide, comprising a body, a groove in the middle of the body, into which a workpiece can fall temporarily for placement, avoiding accidental welding before complete positioning; a placement plate is slidably arranged inside the groove to support the workpiece; at least two positioning components, each including a slider and an electric push rod; a clamping component inside the slider; a linkage component on one side of the slider; the electric push rod on one side of the body, with its output end fixed to the slider; a moving frame with a pulley rotatably arranged on one side and racks on both sides; at least two lifting components inside the body for raising and lowering the placement plate; and at least four locking components inside the body for fixing the raised placement plate. Welding can only proceed after the lifting components have raised the workpiece to position by lifting the placement plate and the positioning components have locked the workpiece in place.

[0007] Preferably, the clamping assembly includes a rotary motor and a positioning block. The rotary motor is fixedly mounted on one side of the slider. The output end of the rotary motor extends into the interior of the slider and is fixedly mounted with a bidirectional lead screw. Two sets of mounting plates are threadedly connected to the outer side of the bidirectional lead screw. One side of the mounting plate is fixedly mounted with a clamping plate that is slidably mounted on the outside of the slider. The positioning block is fixedly mounted on one side of the slider and is located between the two sets of clamping plates.

[0008] Preferably, two sets of mounting seats are fixedly provided on one side of the movable frame, a central shaft is fixedly provided between the two sets of mounting seats, a pulley is rotatably provided on the outer side of the central shaft, and two sets of discs are fixedly provided on the outer side of the central shaft, with the two sets of discs located on both sides of the pulley.

[0009] Preferably, the lifting assembly includes a fixed column, which is fixedly installed inside the machine body. A swing plate is rotatably installed on the outer side of the fixed column. A movable shaft is fixedly installed on one side of the swing plate. A roller is rotatably installed on the outer side of the movable shaft, and the outer side of the roller contacts one side of the placement plate. An installation shaft is fixedly installed on the side of the swing plate away from the movable shaft. A push plate is slidably installed on the outer side of the installation shaft. A connecting shaft is rotatably installed on the side of the push plate away from the installation shaft. A support platform is fixedly installed on one side of the connecting shaft, and the support platform is fixedly installed inside the machine body.

[0010] Preferably, two sets of anti-detachment blocks are fixedly installed on the outer side of the fixed column, and the two sets of anti-detachment blocks are respectively located on both sides of the swing plate.

[0011] Preferably, the locking assembly includes a mounting plate and a guide plate. The mounting plate is fixedly disposed inside the machine body. A fixing rod is fixedly disposed on one side of the mounting plate. A movable tube is rotatably disposed on the outside of the fixing rod. A rotating disk and a gear are fixedly disposed on the outside of the movable tube. A connecting rope is fixedly disposed inside the rotating disk.

[0012] Preferably, the guide plate is fixedly disposed inside the machine body, a parallel plate is slidably disposed on the outer side of the guide plate, the end of the connecting rope away from the rotating disk is fixedly disposed with the parallel plate, a protrusion is fixedly disposed on the side of the parallel plate away from the connecting rope, and the protrusion is located inside the groove, a limit block is fixedly disposed inside the parallel plate, and the limit block is slidably disposed inside the guide plate, a fixed plate is fixedly disposed on the outer side of the limit block, a movable plate is slidably disposed on the outer side of the limit block, and a first spring is fixedly disposed between the movable plate and the fixed plate.

[0013] Preferably, an anti-collision pad is fixedly provided on the outer side of the limiting block. The anti-collision pad is made of rubber and is located on the side of the guide plate away from the first spring.

[0014] Preferably, a baffle plate is fixedly provided on the outer side of the fixed rod, and the baffle plate is rotatably disposed inside the movable tube.

[0015] Preferably, two sets of fixed platforms are fixedly arranged inside the groove, and a connecting platform is slidably arranged inside the fixed platform. One side of the connecting platform is fixedly arranged with the placement plate, and a movable plate is fixedly arranged on both sides of the connecting platform. Two sets of guide rods are fixedly arranged inside the fixed platform, and the movable plate is slidably arranged outside the guide rods. A second spring is fixedly arranged on one side of the movable plate, and the end of the second spring away from the movable plate is fixedly arranged inside the fixed platform. Beneficial effects

[0016] This positioning fixture for welding mobile carriages works by coordinating a positioning component and a lifting component. After the workpiece falls into the groove, the lifting component lifts the placement plate to raise it, causing the workpiece to detach from the groove. Then, the positioning component locks the workpiece in place. Only then can welding be performed, preventing erroneous operations such as welding before the workpiece is positioned and preventing welding deformation and dimensional deviations. At the same time, the locking component locks the placement plate. The lifting component can only fall back to its original position when the slider moves back and the locking component is released, eliminating operational errors in the unloading process and increasing the applicability of the device. Attached Figure Description

[0017] Figure 1 This is a side view of the structure of the present invention; Figure 2 This is a partial structural cross-sectional view of the body of the present invention; Figure 3This is a partial structural cross-sectional view of the body of the present invention; Figure 4 This is a schematic diagram of the positioning component, lifting component, and locking component of the present invention; Figure 5 This is a schematic diagram of the positioning component of the present invention; Figure 6 This is a cross-sectional view of the slider and protective cover of the present invention; Figure 7 This is a schematic diagram of the structure of the mobile frame of the present invention; Figure 8 This is a schematic diagram of the lifting component of the present invention; Figure 9 This is a schematic diagram of the locking component of the present invention; Figure 10 This is a cross-sectional view of the parallel plate of the present invention; Figure 11 This is a cross-sectional view of the structure of the movable tube and rotating disk of the present invention; Figure 12 This is a cross-sectional view of the structure of the body of the present invention; Figure 13 This is a cross-sectional view of the structure of the fixing platform of the present invention.

[0018] In the diagram: 1. Machine body; 2. Positioning assembly; 201. Slider; 202. Positioning block; 203. Moving frame; 204. Protective cover; 205. Clamping plate; 206. Bidirectional lead screw; 207. Mounting plate; 208. Rotary motor; 209. Electric push rod; 210. Fixed plate; 211. Rack; 212. Pulley; 213. Disc; 214. Central shaft; 215. Mounting base; 3. Lifting assembly; 301. Fixed column; 302. Roller; 303. Movable shaft; 304. Swing plate; 305. Connecting shaft; 306. Support platform; 307. Push plate 308. Mounting shaft; 309. Anti-detachment block; 4. Locking assembly; 401. Mounting disc; 402. Rotating disc; 403. Movable tube; 404. Gear; 405. Guide plate; 406. Parallel plate; 407. Connecting rope; 408. Anti-collision pad; 409. Protrusion; 410. Limiting block; 411. Fixed disc; 412. First spring; 413. Movable disc; 414. Blocking plate; 415. Fixed rod; 5. Groove; 6. Placement plate; 7. Fixed platform; 8. Connecting platform; 9. Buffer pad; 10. Second spring; 11. Guide rod; 12. Moving plate. Detailed Implementation

[0019] 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.

[0020] See Figures 1-13 A positioning fixture for welding a movable slide includes a body 1. A groove 5 is formed in the middle of the body 1. A placement plate 6 is slidably connected inside the groove 5, allowing workpieces to fall into the groove 5 for temporary placement, preventing accidental welding before proper positioning. The placement plate 6 supports the workpiece. Two sets of fixed platforms 7 are fixedly connected inside the groove 5. A connecting platform 8 is slidably arranged inside the fixed platform 7. One side of the connecting platform 8 is fixedly connected to the placement plate 6. Movable plates 12 are fixedly arranged on both sides of the connecting platform 8. Two sets of guide rods 11 are fixedly arranged inside the fixed platform 7, and the movable plates 12 are slidably arranged outside the guide rods 11. A second spring 10 is fixedly installed on one side of the movable plate 12. The end of the second spring 10 away from the movable plate 12 is fixedly installed inside the fixed platform 7. When the placement plate 6 is pushed up, the second spring 10 will be squeezed by the movable plate 12. When the placement plate 6 is no longer pushed up, the second spring 10 will bounce the placement plate 6 back quickly by bouncing the movable plate 12 and the connecting platform 8. Two sets of buffer pads 9 are fixedly connected to the top of the fixed platform 7, and the buffer pads 9 are located between the fixed platform 7 and the placement plate 6. Two sets of positioning components 2, two sets of lifting components 3 and four sets of locking components 4 are provided on the body 1.

[0021] First, refer to Figures 1 to 7 In this embodiment, the positioning component 2 includes a slider 201 and an electric push rod 209. A clamping component is fixedly connected inside the slider 201, and a linkage component is fixedly connected to the bottom of the slider 201. The electric push rod 209 is connected to one side of the machine body 1, and the output end of the electric push rod 209 is fixedly connected to the slider 201.

[0022] The clamping assembly includes a rotary motor 208 and a positioning block 202. The rotary motor 208 is fixedly connected to one side of the slider 201. The rotary motor 208 is a bidirectional motor, and its output end can rotate forward or backward. The output end of the rotary motor 208 extends into the interior of the slider 201 and is fixedly connected to a bidirectional lead screw 206. Two sets of mounting plates 207 are threadedly connected to the outer side of the bidirectional lead screw 206. One side of the mounting plate 207 is fixedly connected to a clamping plate 205 that is slidably connected to the outside of the slider 201. The positioning block 202 is fixedly connected to one side of the slider 201 and is located between the two sets of clamping plates 205.

[0023] A protective cover 204 is fixedly connected to one side of the slider 201. The protective cover 204 is located outside the rotary motor 208, and a heat dissipation hole and a cable routing hole are provided on one side of the protective cover 204.

[0024] After the rotary motor 208 is turned on, the output end of the rotary motor 208 will drive the bidirectional lead screw 206 to rotate. The rotation of the bidirectional lead screw 206 will drive the two sets of mounting plates 207 to move relative to each other. The displacement of the mounting plates 207 will push the clamping plate 205 to move. The displacement of the clamping plate 205 will push the two sides of the workpiece, thereby adjusting the workpiece. At the same time, after the electric push rod 209 is turned on, the output end of the electric push rod 209 will push the slider 201 to move horizontally. The displacement of the slider 201 will push the positioning block 202 to move horizontally. At this time, the adjusted workpiece will be clamped by the two sets of positioning blocks 202, completing the positioning work.

[0025] After the workpiece is pushed into the groove 5 by the positioning block 202 or the clamping plate 205, the positioning block 202 and the clamping plate 205 can only perform positioning work on the workpiece after it is lifted out of the groove 5.

[0026] The linkage component includes a movable frame 203, which is fixedly connected to the bottom of the slider 201 and slidably connected inside the body 1. Two sets of mounting seats 215 are fixedly connected to one side of the movable frame 203, and a central shaft 214 is fixedly connected between the two sets of mounting seats 215. A pulley 212 is rotatably connected to the outside of the central shaft 214, and two sets of discs 213 are fixedly connected to the outside of the central shaft 214. The two sets of discs 213 are located on both sides of the pulley 212, so that the discs 213 can block the pulley 212 and prevent the pulley 212 from being misaligned. A fixing plate 210 is fixedly connected to both sides of the movable frame 203, and a rack 211 is fixedly connected to the bottom of the fixing plate 210.

[0027] The displacement of slider 201 will cause the movable frame 203 to move accordingly. The displacement of movable frame 203 will push pulley 212 to move horizontally by pushing mounting base 215 and central shaft 214. At the same time, the displacement of movable frame 203 will push rack 211 to move accordingly by pushing fixed plate 210.

[0028] In addition, see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8In this embodiment, the lifting assembly 3 includes a fixed column 301, which is fixedly connected to the inside of the body 1. A swing plate 304 is rotatably connected to the outside of the fixed column 301. The swing plate 304 is inclined, with one side of the swing plate 304 located inside the body 1 and the other side of the swing plate 304 located in the groove 5. A movable shaft 303 is fixedly connected to one side of the swing plate 304. A roller 302 is rotatably connected to the outside of the movable shaft 303, and the outside of the roller 302 contacts the bottom of the placement plate 6. An installation shaft 308 is fixedly connected to the side of the swing plate 304 away from the movable shaft 303. A push plate 307 is slidably connected to the outside of the installation shaft 308. The push plate 307 is inclined, and a connecting shaft 305 is rotatably connected to the side of the push plate 307 away from the installation shaft 308. A support platform 306 is fixedly connected to one side of the connecting shaft 305. The support platform 306 is fixedly connected to the inside of the body 1 and is located inside the push plate 307.

[0029] Specifically, in order to prevent the swing plate 304 from being misaligned, two sets of anti-detachment blocks 309 are fixedly connected to the outside of the fixed column 301, and the two sets of anti-detachment blocks 309 are located on both sides of the swing plate 304 respectively. Thus, the swing plate 304 can be blocked by the anti-detachment blocks 309, avoiding the situation of the swing plate 304 being misaligned during the operation.

[0030] When the displacement of the movable frame 203 pushes the pulley 212 to move, the pulley 212 will push one side of the push plate 307. At this time, the push plate 307 will swing around the connecting shaft 305 as the axis. The swing of the push plate 307 will push the mounting shaft 308 downward on the side away from the connecting shaft 305. When the mounting shaft 308 is pushed, it will push the swing plate 304 to swing around the fixed column 301 as the axis. The swing of the swing plate 304 will push the roller 302 upward by pushing the movable shaft 303 on the side away from the mounting shaft 308. The upward movement of the roller 302 will push the placement plate 6 upward. At this time, the placement plate 6 will push the workpiece to rise and get out of the groove 5.

[0031] Finally, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 9 , Figure 10 , Figure 11In this embodiment, the locking component 4 includes a mounting plate 401 and a guide plate 405. The mounting plate 401 is fixedly connected to the inside of the body 1. A fixing rod 415 is fixedly connected to one side of the mounting plate 401. A movable tube 403 is rotatably connected to the outside of the fixing rod 415. A blocking plate 414 is fixedly connected to the outside of the fixing rod 415. The blocking plate 414 is rotatably connected to the inside of the movable tube 403, thereby blocking the movable tube 403 and preventing the movable tube 403 from detaching from the fixing rod 415. A rotating plate 402 and a gear 404 are fixedly connected to the outside of the movable tube 403. A connecting rope 407 is fixedly connected to the inside of the rotating plate 402.

[0032] A guide plate 405 is fixedly connected inside the body 1. A parallel plate 406 is slidably connected to the outer side of the guide plate 405. The end of the connecting rope 407 away from the rotating disk 402 is fixedly connected to the parallel plate 406. A protrusion 409 is fixedly connected to the side of the parallel plate 406 away from the connecting rope 407. The bottom of the protrusion 409 is arc-shaped, and the top of the protrusion 409 is flat. The protrusion 409 is located inside the groove 5. A limiting block 410 is fixedly connected inside the parallel plate 406, and the limiting block 410 is slidably connected inside the guide plate 405. A fixed disk 411 is fixedly connected to the outer side of the limiting block 410. A movable disk 413 is slidably connected to the outer side of the limiting block 410, and a first spring 412 is fixedly connected between the movable disk 413 and the fixed disk 411. An anti-collision pad 408 is fixedly connected to the outer side of the limiting block 410. The anti-collision pad 408 is made of rubber and is located on the side of the guide plate 405 away from the first spring 412.

[0033] When the placement plate 6 moves upward, it will contact the protrusion 409 and push the protrusion 409 to move horizontally. At this time, the protrusion 409 will disengage from the groove 5 and enter the interior of the body 1. Simultaneously, the displacement of the protrusion 409 will push the parallel plate 406 to move. The displacement of the parallel plate 406 will push the limiting block 410 to move. The displacement of the limiting block 410 will cause the movable disk 413 to be squeezed by the guide plate 405. At this time, the first spring 412 will be squeezed by the movable disk 413 and the fixed disk 411. When the placement plate 6 continues to move upward and no longer squeezes the protrusion 409, the first spring 412 will bounce the parallel plate 406 and the protrusion 409 back by bouncing the fixed disk 411 back. At this time, the protrusion 409 will re-enter the interior of the groove 5, and the top of the protrusion 409 will... The placement plate 6 will be blocked, thus preventing it from resetting. When the welding slider 201 returns, the moving frame 203 will push the rack 211 back by pushing the fixed plate 210. The rack 211 will mesh with the gear 404 and drive the gear 404 to rotate. The rotation of the gear 404 will drive the movable tube 403 to rotate. The rotation of the movable tube 403 will drive the rotating disk 402 to rotate. The rotation of the rotating disk 402 will wrap around the connecting rope 407. At this time, one end of the connecting rope 407 will pull the parallel plate 406 to move horizontally. The displacement of the parallel plate 406 will push the protrusion 409 to move and enter the interior of the machine body 1 to disengage from the groove 5. At this time, the protrusion 409 no longer blocks the placement plate 6, and the placement plate 6 can be reset.

[0034] This positioning fixture for welding mobile carriages, through the cooperation between the positioning component 2 and the lifting component 3, allows the lifting component 3 to lift the placement plate 6 after the workpiece falls into the groove 5, so that the workpiece is removed from the groove 5. Then, the positioning component 2 positions and locks the workpiece, and welding can only be performed on the workpiece at this time. This avoids the misoperation of welding before the workpiece is positioned, and prevents welding deformation and dimensional deviation. At the same time, the locking component 4 can lock the placement plate 6. Only when the slider 201 moves back and the locking component 4 is released can the lifting component 3 fall back to its original position, eliminating the possibility of operational errors in the unloading process and increasing the application range of the device.

[0035] Working principle:

[0036] This positioning fixture for welding mobile carriage works by placing the workpiece to be welded on the machine body 1. Then, the electric push rod 209 is activated, causing its output end to push the slider 201 to move. The displacement of the slider 201 will push the positioning block 202 to move. Simultaneously, the rotary motor 208 is activated, causing its output end to drive the bidirectional lead screw 206 to rotate. The rotation of the bidirectional lead screw 206 will cause the two sets of mounting plates 207 to move relative to each other. The displacement of the mounting plates 207 will push the clamping plates 205 to move. The displacement of the clamping plates 205 will push the workpiece on both sides. At this time, the positioning block 202 or the clamping plates 205 will push the workpiece into the groove 5, and the workpiece will fall onto the placement plate 6, avoiding the misoperation of welding before complete positioning. Then, the displacement of the slider 201 will push the mobile frame 203 to move accordingly. The displacement of the mobile frame 203 will push the pulley 212 horizontally by pushing the mounting base 215 and the central shaft 214. Simultaneously, the displacement of the mobile frame 203 will push the pulley 212 horizontally by pushing the mounting base 215 and the central shaft 214. The fixed plate 210 pushes the rack 211 to move accordingly. When the displacement of the moving frame 203 pushes the pulley 212 to move, the pulley 212 will push one side of the push plate 307. At this time, the push plate 307 will swing around the connecting shaft 305. The swing of the push plate 307 will push the mounting shaft 308 downward away from the connecting shaft 305. When the mounting shaft 308 is pushed, it will push the swing plate 304 to swing around the fixed column 301. The swing of the swing plate 304 will push the roller 302 upward by pushing the movable shaft 303 away from the mounting shaft 308. The upward movement of the roller 302 will push the placement plate 6 upward. At this time, the placement plate 6 will push the workpiece to rise and get out of the groove 5. After the workpiece gets out of the groove 5, the displacement of the two sets of clamping plates 205 will push the two sides of the workpiece, thereby adjusting the workpiece. Furthermore, the continued movement of the slider 201 will make the positioning block 202 position and clamp the workpiece, thereby completing the positioning work of the workpiece.

[0037] Simultaneously, when the placement plate 6 moves upward, it will contact the protrusion 409 and push the protrusion 409 to move horizontally. At this time, the protrusion 409 will disengage from the groove 5 and enter the interior of the body 1. At the same time, the displacement of the protrusion 409 will push the parallel plate 406 to move. The displacement of the parallel plate 406 will push the limiting block 410 to move. The displacement of the limiting block 410 will cause the movable disk 413 to be squeezed by the guide plate 405. At this time, the first spring 412 will be squeezed by the movable disk 413 and the fixed disk 411. When the placement plate 6 continues to move upward and no longer squeezes the protrusion 409, the first spring 412 will bounce the parallel plate 406 and the protrusion 409 back by bouncing the fixed disk 411 back. At this time, the protrusion 409 will re-enter the interior of the groove 5, and the top of the protrusion 409 will abut against the placement plate 6, so that the placement plate 6 cannot be reset.

[0038] After the workpiece welding is completed, the electric push rod 209 is activated so that its output end pushes the slider 201 to move back. At this time, the moving frame 203 will move back accordingly. The movement of the moving frame 203 will push the rack 211 back by pushing the fixed plate 210. The rack 211 will mesh with the gear 404 and drive the gear 404 to rotate. The rotation of the gear 404 will drive the movable tube 403 to rotate. The rotation of the movable tube 403 will drive the rotating disk 402 to rotate. The rotation of the rotating disk 402 will wind the connecting rope 407. At this time, one end of the connecting rope 407 will pull the parallel plate 406 to move horizontally. The displacement of the parallel plate 406 will push the protrusion 409 to move and enter the interior of the machine body 1 to disengage from the groove 5. At this time, the protrusion 409 no longer blocks the placement plate 6. The second spring 10 will bounce the placement plate 6 back quickly by bouncing the moving plate 12 and the connecting table 8, thereby completing the reset of the placement plate 6.

[0039] 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 positioning fixture for welding a movable carriage, characterized in that, include: The machine body (1) has a groove (5) in the middle, and the workpiece can fall into the groove (5) for temporary placement to avoid the mistake of welding before it is fully positioned. The groove (5) is also equipped with a placement plate (6). At least two sets of positioning components (2), the positioning components (2) include a slider (201) and an electric push rod (209), the slider (201) is provided with a clamping component inside, a linkage component is provided on one side of the slider (201), the electric push rod (209) is provided on one side of the machine body (1), and the output end of the electric push rod (209) is fixedly set with the slider (201); The linkage component includes a movable frame (203), on one side of which a pulley (212) is rotatably provided, and on both sides of the movable frame (203) a rack (211). At least two sets of lifting components (3) are provided inside the body (1) for lifting and lowering the placement plate (6); At least four sets of locking components (4) are provided inside the body (1) for fixing the raised placement plate (6). Welding can only be carried out after the lifting assembly (3) lifts the workpiece into place by lifting the placement plate (6) and the positioning assembly (2) completes the workpiece positioning and locking.

2. The positioning fixture for welding a movable carriage according to claim 1, characterized in that, The clamping assembly includes a rotary motor (208) and a positioning block (202). The rotary motor (208) is fixedly mounted on one side of the slider (201). The output end of the rotary motor (208) extends into the interior of the slider (201) and is fixedly mounted with a bidirectional lead screw (206). Two sets of mounting plates (207) are threadedly connected to the outer side of the bidirectional lead screw (206). One side of the mounting plate (207) is fixedly mounted with a clamping plate (205) that is slidably mounted on the outside of the slider (201). The positioning block (202) is fixedly mounted on one side of the slider (201) and is located between the two sets of clamping plates (205).

3. The positioning fixture for welding a movable carriage according to claim 1, characterized in that, Two sets of mounting seats (215) are fixedly provided on one side of the movable frame (203). A central shaft (214) is fixedly provided between the two sets of mounting seats (215). A pulley (212) is rotatably provided on the outer side of the central shaft (214). Two sets of discs (213) are fixedly provided on the outer side of the central shaft (214), and the two sets of discs (213) are located on both sides of the pulley (212).

4. The positioning fixture for welding a movable carriage according to claim 1, characterized in that, The lifting assembly (3) includes a fixed column (301), which is fixedly installed inside the body (1). A swing plate (304) is rotatably installed on the outside of the fixed column (301). A movable shaft (303) is fixedly installed on one side of the swing plate (304). A roller (302) is rotatably installed on the outside of the movable shaft (303), and the outside of the roller (302) contacts one side of the placement plate (6). An installation shaft (308) is fixedly installed on the side of the swing plate (304) away from the movable shaft (303). A push plate (307) is slidably installed on the outside of the installation shaft (308). A connecting shaft (305) is rotatably installed on the side of the push plate (307) away from the installation shaft (308). A support platform (306) is fixedly installed on one side of the connecting shaft (305). The support platform (306) is fixedly installed inside the body (1).

5. The positioning fixture for welding a movable carriage according to claim 4, characterized in that, Two sets of anti-detachment blocks (309) are fixedly installed on the outside of the fixed column (301), and the two sets of anti-detachment blocks (309) are located on both sides of the swing plate (304).

6. The positioning fixture for welding a movable carriage according to claim 1, characterized in that, The locking assembly (4) includes a mounting plate (401) and a guide plate (405). The mounting plate (401) is fixedly installed inside the body (1). A fixing rod (415) is fixedly installed on one side of the mounting plate (401). A movable tube (403) is rotatably installed on the outside of the fixing rod (415). A rotating plate (402) and a gear (404) are fixedly installed on the outside of the movable tube (403). A connecting rope (407) is fixedly installed inside the rotating plate (402).

7. The positioning fixture for welding a movable carriage according to claim 6, characterized in that, The guide plate (405) is fixedly installed inside the body (1). A parallel plate (406) is slidably installed on the outer side of the guide plate (405). The end of the connecting rope (407) away from the rotating disk (402) is fixedly installed with the parallel plate (406). A protrusion (409) is fixedly installed on the side of the parallel plate (406) away from the connecting rope (407), and the protrusion (409) is located inside the groove (5). A limit block (410) is fixedly installed inside the parallel plate (406), and the limit block (410) is slidably installed inside the guide plate (405). A fixed disk (411) is fixedly installed on the outer side of the limit block (410). A movable disk (413) is slidably installed on the outer side of the limit block (410), and a first spring (412) is fixedly installed between the movable disk (413) and the fixed disk (411).

8. The positioning fixture for welding a movable carriage according to claim 7, characterized in that, An anti-collision pad (408) is fixedly provided on the outer side of the limiting block (410). The anti-collision pad (408) is made of rubber and is located on the side of the guide plate (405) away from the first spring (412).

9. The positioning fixture for welding a movable carriage according to claim 6, characterized in that, A baffle plate (414) is fixedly installed on the outside of the fixed rod (415), and the baffle plate (414) is rotatably installed inside the movable tube (403).

10. The positioning fixture for welding a movable carriage according to claim 1, characterized in that, Two sets of fixed platforms (7) are fixedly installed inside the groove (5). A connecting platform (8) is slidably installed inside the fixed platform (7). One side of the connecting platform (8) is fixedly installed with the placement plate (6). Movable plates (12) are fixedly installed on both sides of the connecting platform (8). Two sets of guide rods (11) are fixedly installed inside the fixed platform (7). The movable plate (12) is slidably installed on the outside of the guide rods (11). A second spring (10) is fixedly installed on one side of the movable plate (12). The end of the second spring (10) away from the movable plate (12) is fixedly installed inside the fixed platform (7).

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