Multi-directional positioning fixture for welding gasoline engine water pump

Abstract

The present application is suitable for the technical field of welding tooling, and provides a multi-direction positioning clamp for gasoline engine water pump welding, which comprises an assembly seat, a plurality of round pipe clamping seats, a plurality of positioning plates and two rear support plates are fixedly installed on the top of the assembly seat, the plurality of round pipe clamping seats are used for clamping into the bottom of both sides when the round pipe frame is put in, the plurality of positioning plates are used for positioning support when the pump body mounting plate is placed in the welding position between the round pipe frames, the pump body mounting plate is placed on the positioning plate, and the two rear support plates are located on the same side of the assembly seat. The multi-direction positioning clamp for gasoline engine water pump welding provided by the scheme can realize three-dimensional vacuum positioning through the bottom, side and top, can realize one-time clamping and multi-direction welding through foldable guide arms, single motor synchronous driving and pitch and rotation double-freedom adjustment, can guarantee welding seam precision and operation safety while simplifying the structure and shortening the beat, and can significantly improve the welding efficiency and automation level of the gasoline engine water pump rack.

Description

Technical Field

[0001] This invention belongs to the field of welding tooling technology, and particularly relates to a multi-directional positioning fixture for welding gasoline engine water pumps. Background Technology

[0002] The frame of the gasoline engine unit is a circular tube frame made of bent steel pipes, with a pump body mounting plate and cross tie tubes welded between them. There are usually two cross tie tubes, welded between the upper part of the circular tube frame. The pump body mounting plate usually has bolt holes for mounting the gasoline engine pump body, welded between the lower part of the circular tube frame. To ensure strength, steel plates with U-shaped structures are usually used for welding. To improve processing efficiency, positioning fixtures are required during the welding process to meet the placement and positioning of multiple components, followed by manual or robotic welding.

[0003] In the existing technology, although some fixtures or tooling can meet the positioning requirements, when actually placing the round pipe frame, pump body mounting plate and horizontal pull round pipe, the fixture itself does not have a guiding placement function, so the position needs to be manually adjusted repeatedly to meet the welding accuracy. For example, the authorization announcement number CN111805137B has the above problem. Although it fixes the base plate of the platform and the round pipe frame to a certain extent, it does not reflect the positioning of the horizontal pull round pipe above. Summary of the Invention

[0004] This invention provides a multi-directional positioning fixture for welding gasoline engine water pumps, aiming to solve the problem mentioned in the background art that the currently used fixtures and tooling do not have the function of guiding the placement of various components.

[0005] To solve the above problems, the present invention is implemented as follows: a multi-directional positioning fixture for welding a gasoline engine water pump includes: an assembly base, on the top of which are fixedly mounted multiple round tube holders, multiple positioning plates, and two rear support plates. The multiple round tube holders are used to engage the bottom sides of the round tube frame when it is placed in. The multiple positioning plates are used for positioning and supporting the pump body mounting plate placed between the round tube frames at the welding position. The pump body mounting plate is placed on the positioning plates. The two rear support plates are located on the same side of the assembly base. Two limiting guide plates are fixedly mounted on each of the two rear support plates to limit the width when the round tube frame is placed along the opening, so as to accurately position the horizontally pulled round tube when it is placed in. A connecting plate is fixedly mounted on each of the two rear support plates. The same assembly back plate is fixedly mounted on the two connecting plates. A round tube placement plate is fixedly mounted on the assembly back plate. The round tube placement plate has multiple round tube slots for positioning and supporting the horizontally pulled round tube placed between the round tube frames at the welding position. The round tube placement plate is arranged parallel to the limiting guide plates on both sides.

[0006] Preferably, an air box and a motor are fixedly mounted on the bottom of the assembly base. A transverse sliding screw is rotatably mounted inside the air box, with one end extending outside the air box and fixedly connected to the output shaft of the motor. A valve plate is slidably mounted inside the air box, threaded onto the transverse sliding screw so that the transverse sliding screw drives the valve plate to slide. The same three-way valve pipe is fixedly mounted on the bottom of the air box and the assembly base. An air pressure balance port is opened on the other side of the air box opposite to the three-way valve pipe. An air cavity is opened on the assembly base, and the three-way valve pipe is connected to the air... The cavities are interconnected. Each of the multiple circular tube holders has an air port 1 connected to the air cavity for adsorbing and fixing the circular tube frame. Each of the multiple positioning plates has an air guide cavity 1 connected to the air cavity. Each of the multiple positioning plates has an air port 2 for adsorbing and fixing the pump body mounting plate. The circular tube placement plate has an air guide cavity 2. Each of the multiple circular tube slots has an air port 3 connected to the air guide cavity 2 for adsorbing and fixing the horizontally pulling circular tube. An air pipe is fixedly installed between the assembly base and the circular tube placement plate so that the air cavity is connected to the air guide cavity 2 and the air guide cavity 2.

[0007] Preferably, a lifting plate is provided above the round tube placement plate and fixedly connected to the assembly back plate. A lifting plate is slidably installed between the lifting plate and the round tube placement plate. A lifting screw is rotatably installed on the lifting plate, and the lifting screw is threaded through the lifting plate to drive the lifting plate to rise and fall. A lifting guide rod is fixedly installed at the bottom of the lifting plate, and the lifting guide rod slides through the lifting plate to guide the lifting plate to rise and fall. Rotating shafts are rotatably installed on both sides of the lifting plate. Support arm plates are fixedly sleeved on both rotating shafts. Pull rod limiting plates are installed on both support arm plates to position the horizontally pulled round tube when it is placed, so that the horizontally pulled round tube is correctly placed into the welding position of the round tube frame. The two support arm plates are unfolded when the horizontally pulled round tube is placed, so that the pull rod limiting plate is in the limiting position. The horizontally pulled round tube is stored after placement.

[0008] Preferably, a deflection gear is fixedly sleeved on each of the two rotating shafts, and a deflection rack is fixedly installed on both sides of the mounting back plate. The two deflection gears mesh with the two deflection racks respectively, so that when the lifting plate rises, the deflection gear drives the rotating shaft and the support arm plate to deflect upward, and deflect downward when it descends.

[0009] Preferably, the shape of the positioning plate is adapted to the pump body mounting plate, and the opening position of the second air port is staggered from the mounting hole on the pump body mounting plate.

[0010] Preferably, the space between the two corresponding limiting guide plates is the insertion channel, the side of the two limiting guide plates away from the rear support plate is the insertion side, and the round tube placement plate and the rear support plate are located on the same side.

[0011] Preferably, the position of the trachea is offset from the placement and removal trajectory of the circular tube frame, and the trachea is located on the rear side after the circular tube frame is installed.

[0012] Preferably, the support arm plate has an L-shaped structure, the lifting plate and the hoisting plate are staggered from the circular tube frame, and the lifting guide rod is a rectangular rod.

[0013] Preferably, the bottom of the pull rod limiting plate is provided with a blade-like surface, and the side of it located at the end of the horizontal pull tube is a flat surface, which is used for end face guidance when the horizontal pull tube is inserted.

[0014] Preferably, the deflection angle of the support arm plate is ±90°.

[0015] Compared with related technologies, the multi-directional positioning fixture for welding gasoline engine water pumps provided by this invention has the following beneficial effects:

[0016] Compared with existing technologies, the multi-directional positioning fixture for gasoline engine water pump welding provided by this solution achieves multi-directional welding with one clamping by using three-dimensional vacuum positioning from the bottom, side and top, foldable guide arm, single motor synchronous drive and pitch and rotation dual-degree-of-freedom adjustment. While simplifying the structure and shortening the cycle time, it ensures weld accuracy and operational safety, and significantly improves the welding efficiency and automation level of gasoline engine water pump stand. Attached Figure Description

[0017] Figure 1 This is a front-view stereoscopic structural diagram of the present invention;

[0018] Figure 2 for Figure 1 An enlarged structural diagram of part A shown in the figure;

[0019] Figure 3 This is a rear-view stereoscopic structural diagram of the present invention;

[0020] Figure 4 for Figure 3 An enlarged structural diagram of part B shown in the figure;

[0021] Figure 5 for Figure 3 An enlarged structural diagram of section C shown in the figure;

[0022] Figure 6 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0023] Figure 7 for Figure 6 An enlarged structural diagram of part D shown in the figure;

[0024] Figure 8 for Figure 6 An enlarged structural diagram of part E shown in the figure;

[0025] Figure 9 for Figure 6 An enlarged structural diagram of part F shown in the figure;

[0026] Figure 10 for Figure 6 An enlarged structural diagram of part G shown in the figure;

[0027] Figure 11 for Figure 6 An enlarged structural diagram of section H shown in the figure;

[0028] Figure 12 This is a rear-view three-dimensional structural diagram of the assembly panel section;

[0029] Figure 13 This is a bottom-view three-dimensional structural diagram of the assembly panel section;

[0030] Figure 14 This is a front-view three-dimensional structural diagram of the circular tube placement plate section;

[0031] Figure 15 A front-view three-dimensional structural diagram of the lifting platform and outrigger plate;

[0032] Figure 16 This is a bottom-view three-dimensional structural diagram of the lifting platform and the outrigger plate.

[0033] Reference numerals: 1. Assembly base; 2. Round tube holder; 3. Positioning plate; 4. Rear support plate; 5. Limiting guide plate; 6. Connecting plate; 7. Assembly back plate; 8. Round tube placement plate; 9. Round tube slot; 10. Round tube frame; 11. Pump body mounting plate; 12. Horizontal pull round tube; 13. Air box; 14. Motor 1; 15. Horizontal movement screw; 16. Valve plate; 17. Three-way valve pipe; 18. Air pressure balance port; 19. Air cavity; 20. Air port 1; 21. Air guide cavity 1; 22. Air port 2; 23. Air guide cavity 2; 24. Air port 3; 25. Air pipe; 26. Lifting plate; 27. Lifting plate; 28. Lifting screw; 29. ​​Lifting guide rod; 30. Rotating shaft; 31. Support arm plate; 32. Tie rod limiting plate; 33. Deflection gear; 34. Deflection rack; 35. 36. Positioning port; 37. Positioning strip; 38. Shaft seat; 39. Rotating shaft; 40. Moving gear; 41. Support seat; 42. Rectangular guide rod; 43. Counterweight slider; 44. Moving rack; 45. Return spring; 46. Protective strip; 47. Wheel axle one; 48. Pulley assembly one; 49. Wheel axle two; 50. Pulley assembly two; 51. Pulley assembly three; 52. Bevel gear one; 53. Base plate; 54. Hinge seat; 55. Hinge shaft; 56. Support arm; 57. Fixing plate; 58. Deflection electric telescopic rod; 59. Steering wheel; 60. Bevel gear ring; 61. Power conversion shaft; 62. Bevel gear two; 63. Small gear; 64. Motor two; 65. Large gear; 66. Limiting support plate; 67. Controller; 68. Gear groove. Detailed Implementation

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] This invention provides a multi-directional positioning fixture for welding gasoline engine water pumps, such as... Figure 1-16As shown, the multi-directional positioning fixture for welding a gasoline engine water pump includes: an assembly base 1, on the top of which are fixedly mounted multiple round tube holders 2, multiple positioning plates 3, and two rear support plates 4. The multiple round tube holders 2 are used to engage the bottom sides of the round tube frame 10 when it is inserted. The multiple positioning plates 3 are used for positioning and supporting the pump body mounting plate 11 at the welding position between the round tube frames 10. The pump body mounting plate 11 is placed on the positioning plates 3. The two rear support plates 4 are located on the same side of the assembly base 1, and two... A limiting guide plate 5 is used to limit the width of the round tube frame 10 when it is inserted along the opening, so as to accurately position the horizontally pulling round tube 12 when it is inserted; a connecting plate 6 is fixedly installed on each of the two rear support plates 4, and the same assembly back plate 7 is fixedly installed on the two connecting plates 6. A round tube placement plate 8 is fixedly installed on the assembly back plate 7. The round tube placement plate 8 has multiple round tube slots 9, which are used for positioning and supporting the horizontally pulling round tube 12 at the welding position between the round tube frame 10. The round tube placement plate 8 is arranged parallel to the limiting guide plates 5 on both sides.

[0036] In this embodiment, during use, the two sides of the circular tube frame 10 are first pushed in along the openings of the paired limiting guide plates 5 on the mounting base 1. The inner surfaces of the two limiting guide plates 5 are used to complete the initial guidance in the width direction until the circular tube frame 10 reaches the designated position, thus establishing the lateral reference. Then, the circular tube frame 10 is pressed down as a whole, and the U-shaped groove of the circular tube holder 2 clamps the bottom tubes on both sides of the circular tube frame 10 at once, providing vertical support and radial centering, so that the circular tube frame 10 remains horizontal. Then, the pump body mounting plate 11 is placed... The pump body mounting plate 11 is placed directly on the platform of the positioning plate 3. The height of the positioning plate 3 is flush with the weld seam below the circular tube frame 10, ensuring that the vertical distance between the pump body mounting plate 11 and the circular tube frame 10 is fixed. Finally, the two horizontal pull circular tubes 12 are horizontally placed into the circular tube slots 9 of the circular tube placement plate 8. The arc of the circular tube slot 9 is in zero-gap fit with the outer diameter of the horizontal pull circular tube 12, and the direction of the circular tube slot 9 is parallel to the limiting guide plate 5, ensuring that the horizontal pull circular tube 12 and the weld seam above the circular tube frame 10 are completely aligned, achieving three-way one-time positioning and reducing manual adjustment time.

[0037] After the circular tube frame 10 is locked by the circular tube holder 2 and the limiting guide plate 5, the pump body mounting plate 11 is placed directly on the positioning plate 3. The platform height of the positioning plate 3 is flush with the lower welding position of the circular tube frame 10, so as to achieve the relative height positioning of the pump body mounting plate 11 and the circular tube frame 10. Then, the two horizontal pull circular tubes 12 are horizontally placed into the circular tube slots 9 of the circular tube placement plate 8. The arc surface of the circular tube slot 9 matches the outer diameter of the horizontal pull circular tube 12, and the slot direction is parallel to the limiting guide plate 5 to ensure the coaxiality of the horizontal pull circular tube 12 and the upper welding position of the circular tube frame 10.

[0038] The round tube holder 2, the limiting guide plate 5, the round tube placement plate 8, and the round tube slot 9 together form a "bottom-side-top" three-dimensional positioning system. The round tube frame 10 can be pushed in once to simultaneously complete the bottom clamping, side guidance, and top horizontal pulling of the round tube 12 positioning, eliminating the need for repeated manual adjustments and significantly improving the welding accuracy and production efficiency of the gasoline engine water pump stand.

[0039] In a further preferred embodiment of the present invention, an air box 13 and a motor 14 are fixedly installed at the bottom of the mounting base 1. A transverse sliding screw 15 is rotatably installed inside the air box 13. One end of the transverse sliding screw 15 extends outside the air box 13 and is fixedly connected to the output shaft of the motor 14. A valve plate 16 is slidably installed inside the air box 13. The valve plate 16 is threaded onto the transverse sliding screw 15 so that the transverse sliding screw 15 drives the valve plate 16 to slide. The air box 13 and the bottom of the mounting base 1 are fixedly installed with the same three-way valve pipe 17. An air pressure balance port 18 is opened on the other side of the air box 13 opposite to the three-way valve pipe 17. An air cavity 19 is opened on the mounting base 1. The three-way valve... The gate tube 17 is connected to the air cavity 19. Each of the multiple round tube holders 2 has an air port 20 connected to the air cavity 19 for adsorbing and fixing the round tube frame 10. Each of the multiple positioning plates 3 has an air guide cavity 21 connected to the air cavity 19. Each of the multiple positioning plates 3 has an air port 22 for adsorbing and fixing the pump body mounting plate 11. The round tube placement plate 8 has an air guide cavity 23. Each of the multiple round tube slots 9 has an air port 24 connected to the air guide cavity 23 for adsorbing and fixing the horizontal pull round tube 12. An air pipe 25 is fixedly installed between the assembly base 1 and the round tube placement plate 8 so that the air cavity 19 is connected to the air guide cavity 23.

[0040] In this embodiment, before welding, the motor 14 is started and the transverse screw 15 drives the valve plate 16 to slide in the air box 13, so that the three-way valve pipe 17 is connected to the air chamber 19. The air chamber 19 then generates negative pressure at the round tube holder 2 through the air port 20, which adsorbs and locks the already positioned round tube frame 10 downward. At the same time, the negative pressure acts on the positioning plate 3 through the air guide chamber 21 and the air port 22, firmly sucking the pump body mounting plate 11 flat. The negative pressure continues to draw air from the air guide chamber 23 into the air chamber 19 through the air pipe 25, and then draws it out. The air port 24 in each round tube slot 9 generates suction force at the same time, pressing the transverse round tube 12 radially into the round tube slot 9. The air pressure balance port 18 compensates the pressure on the back side of the valve plate 16 in real time to ensure that the adsorption force is continuously stable, and the three components of the round tube frame 10, pump body mounting plate 11 and transverse round tube 12 are vacuum fixed at one time.

[0041] After welding, the reverse start motor 14 is activated, the valve plate 16 moves back, the air chamber 19 is instantly connected to the atmosphere, and the negative pressure is released; the round tube holder 2, the positioning plate 3, and the round tube slot 9 lose pressure simultaneously, and the round tube frame 10, the pump body mounting plate 11, and the horizontal pull round tube 12 can be removed without resistance, realizing one-click release and short part replacement cycle.

[0042] A single vacuum system driven by the same motor-14 can achieve one-time vacuum fixation of the three components: bottom, middle and top, eliminating the need for multiple sets of mechanical clamping mechanisms; the adsorption force is uniform and adjustable, avoiding mechanical indentation and thermal deformation, significantly improving the welding accuracy and production efficiency of the gasoline engine water pump stand, and removal is also relatively simple, the air pressure can be released by reversing the start of motor-14.

[0043] In a further preferred embodiment of the present invention, a lifting plate 26 fixedly connected to the assembly back plate 7 is provided above the circular tube placement plate 8. A lifting plate 27 is slidably installed between the lifting plate 26 and the circular tube placement plate 8. A lifting screw 28 is rotatably installed on the lifting plate 26, and the lifting screw 28 is threaded through the lifting plate 27 to drive the lifting plate 27 to rise and fall. A lifting guide rod 29 is fixedly installed at the bottom of the lifting plate 26, and the lifting guide rod 29 slidably passes through the lifting plate 27 to guide the lifting plate 27 to rise and fall. The lifting plate 27 is raised and lowered. Both sides of the lifting plate 27 are rotatably mounted with rotating shafts 30. Support arm plates 31 are fixedly sleeved on both rotating shafts 30. Pull rod limiting plates 32 are installed on both support arm plates 31. They are used to position the horizontally pulled round tube 12 when it is put in, so that the horizontally pulled round tube 12 is correctly put into the welding position of the round tube frame 10. The two support arm plates 31 are unfolded when the horizontally pulled round tube 12 is put in, so that the pull rod limiting plates 32 are in the limiting position. The horizontally pulled round tube 12 is stored after it is put in.

[0044] In this embodiment, the lifting plate 26 is fixed to the assembly back plate 7. First, the lifting screw 28 is rotated so that the lifting plate 27 slides down along the lifting guide rod 29. At the same time, the two support arm plates 31 unfold outward around the rotating shaft 30, and the pull rod limiting plate 32 rotates synchronously to both sides of the preset trajectory of the horizontal pull tube 12 to form a guide channel.

[0045] When inserting, the horizontal pull tube 12 is pushed horizontally into the guide channel formed by the pull rod limiting plate 32, with both ends abutting against the limiting surface between the pull rod limiting plates 32, and the horizontal pull tube 12 falls into the precise positioning of the tube slot 9; then the lifting screw 28 is rotated in the opposite direction, the lifting plate 27 moves up, the support arm plate 31 retracts inward, and the pull rod limiting plate 32 leaves the working area, leaving operating space for subsequent welding.

[0046] The lifting plate 27 and the pull rod limiting plate 32 form a liftable and foldable "movable guide door", which provides visual guidance during the placement stage and avoids repeated adjustments, and completely avoids obstacles during the welding stage, significantly shortening the clamping time of the horizontal pull tube 12 and improving welding accessibility.

[0047] In a further preferred embodiment of the present invention, deflection gears 33 are fixedly sleeved on both of the two rotating shafts 30, and deflection racks 34 are fixedly installed on both sides of the mounting back plate 7. The two deflection gears 33 mesh with the two deflection racks 34 respectively, so that when the lifting plate 27 rises, the deflection gears 33 drive the rotating shafts 30 and the support arm plate 31 to deflect upward, and deflect downward when it descends.

[0048] In this embodiment, when the lifting screw 28 drives the lifting plate 27 to descend along the lifting guide rod 29, the deflection gear 33 meshes with the deflection rack 34 fixed on the mounting back plate 7, forcing the rotating shaft 30 to rotate synchronously, and the support arm plate 31 unfolds downward, driving the pull rod limiting plate 32 to form a guide channel; conversely, when the lifting plate 27 rises, the meshing action causes the deflection gear 33 to rotate in the opposite direction, and the support arm plate 31 automatically folds upward and retracts.

[0049] After the horizontally pulled round tube 12 is pushed into the round tube slot 9 along the unfolded tie rod limiting plate 32, the lifting plate 27 continues to move upward. The meshing of the deflection gear 33 and the deflection rack 34 ensures that the support arm plate 31 is retracted at the set angle. The tie rod limiting plate 32 is completely removed from the welding area, and the welding gun path can be avoided without manual intervention, thus completing the automatic storage.

[0050] By utilizing the meshing of the deflection gear 33 and the deflection rack 34, the linear motion of the lifting plate 27 is directly converted into the precise angular deflection of the support arm plate 31, thereby achieving the linkage between guidance and avoidance.

[0051] In a further preferred embodiment of the present invention, the shape of the positioning plate 3 is adapted to the pump body mounting plate 11, and the opening position of the second air port 22 is staggered from the mounting hole on the pump body mounting plate 11.

[0052] In this embodiment, the pump body mounting plate 11 is placed directly on the positioning plate 3. The outline of the positioning plate 3 is completely matched with the outer edge shape of the pump body mounting plate 11 to achieve planar positioning. The second air port 22 is opened in the non-assembly hole area of ​​the positioning plate 3 to ensure that it does not interfere with the bolt holes of the pump body mounting plate 11 during negative pressure adsorption.

[0053] In a further preferred embodiment of the present invention, the space between the two corresponding limiting guide plates 5 is an insertion channel, the other side of the two limiting guide plates 5 away from the rear support plate 4 is the insertion side, and the round tube placement plate 8 and the rear support plate 4 are located on the same side.

[0054] In this embodiment, the circular tube frame 10 is horizontally pushed into the insertion channel between the two limiting guide plates 5 from the insertion side, and the limiting guide plates 5 achieve reference positioning in the width direction.

[0055] In a further preferred embodiment of the present invention, the position of the air tube 25 is offset from the pick-up and put-down trajectory of the circular tube frame 10, and the air tube 25 is located on the rear side after the circular tube frame 10 is installed.

[0056] In this embodiment, when the circular tube frame 10 is pushed along the insertion channel formed by the limiting guide plate 5, the air tube 25 is located behind the circular tube frame 10, completely avoiding its picking and placing trajectory. The circular tube frame 10 can be pushed into place in a straight line in one go without detouring or lifting.

[0057] In a further preferred embodiment of the present invention, the support arm plate 31 has an L-shaped structure, the lifting plate 27 and the hoisting plate 26 are staggered from the circular tube frame 10, and the lifting guide rod 29 is a rectangular rod.

[0058] In this embodiment, the L-shaped support arm plate 31 rotates synchronously with the lifting plate 27 around the pivot 30. Its short side forms a hook-shaped guide with the pull rod limiting plate 32. The support arm plate 31 and the lifting plate 27 completely avoid the pick-up and put-down path, reducing obstruction on the front of the fixture and providing a wide field of vision for operation.

[0059] In a further preferred embodiment of the present invention, the bottom of the pull rod limiting plate 32 is provided with a blade-like surface, and one side of it located at the end of the horizontal pull tube 12 is a plane, which is used for end face guidance when the horizontal pull tube 12 is inserted.

[0060] In this embodiment, when the horizontal pull tube 12 is pushed in from the insertion side, its end face first contacts the plane of the pull rod limiting plate 32. The plane provides vertical end face guidance, so that the horizontal pull tube 12 remains horizontal and slides along the correct axis. The blade design can avoid the top of the tube frame 10 and ensure the guidance of the horizontal pull tube 12.

[0061] In a further preferred embodiment of the present invention, the deflection angle of the support arm plate 31 is ±90°.

[0062] In this embodiment, when the lifting plate 27 descends, the deflection gear 33 meshes with the deflection rack 34, and the support arm plate 31 automatically deflects downward to the unfolded position within a range of ±90°. The pull rod limiting plate 32 then swings out to form the end face guide channel of the horizontal pull tube 12. When the lifting plate 27 rises, the meshing reverses and drives the support arm plate 31 to deflect upward 90° to reset, thus achieving complete folding.

[0063] The ±90° limit angle ensures that the pull rod limiting plate 32 remains perpendicular to the end face of the horizontal pull tube 12 in the unfolded state, guaranteeing accurate guidance; after folding, the support arm plate 31 is parallel to the lifting plate 27, minimizing the overall thickness and avoiding interference with the welding torch or the operator's arm.

[0064] To further improve the performance of this device, in addition to the above-mentioned solutions, this solution also includes the following embodiments:

[0065] In another embodiment of the present invention, each of the two pull rod limiting plates 32 is provided with a positioning port 35, and a positioning strip 36 is slidably installed in each of the two positioning ports 35. The positioning strip 36 is fixedly connected to the corresponding support arm plate 31 to stabilize and guide the sliding of the pull rod limiting plate 32. A shaft seat 37 and a support seat 40 are fixedly installed on the top of each of the two support arm plates 31. A toothed groove 68 is provided on one side of each of the two pull rod limiting plates 32 located on the shaft seat 37. A rotating shaft 38 is rotatably installed on each of the two shaft seats 37. A moving gear 39 is fixedly installed at both ends of each of the two rotating shafts 38. One of the moving gears 39 meshes with the toothed groove 68 so that when the rotating shaft 38 rotates, it drives the pull rod limiting plate 32 to slide out when positioned or to be folded and stored. The other moving gear 39 meshes with the pull rod limiting plate 32. The position plate 32 is staggered. A rectangular guide rod 41 is fixedly installed on the support base 40. A counterweight slider 42 is slidably sleeved on the rectangular guide rod 41. The counterweight slider 42 slides according to the folding angle of the support arm plate 31. A movable rack 43 is fixedly installed on the counterweight slider 42. The movable rack 43 is staggered from the sliding trajectory of the pull rod limiting plate 32 and meshes with the corresponding movable gear 39. When the support arm plate 31 deflects to control the sliding of the counterweight slider 42, the movable rack 43 drives the movable gear 39 and the rotating shaft 38 to rotate, thereby controlling the sliding of the pull rod limiting plate 32. A return spring 44 is slidably sleeved on the rectangular guide rod 41. The two ends of the return spring 44 abut against the support base 40 and the counterweight slider 42 respectively, for the reset of the counterweight slider 42 and the pull rod limiting plate 32.

[0066] In this embodiment, when the support arm plate 31 unfolds downward with the lifting plate 27, the counterweight slider 42 slides along the rectangular guide rod 41 under its own weight and the rebound of the return spring 44, driving the moving rack 43 to drive the moving gear 39 to rotate synchronously with the rotating shaft 38; another moving gear 39 meshing with the tooth groove 68 converts the rotational motion into linear motion, causing the pull rod limiting plate 32 to slide outward along the positioning port 35, forming a stable end face guide surface.

[0067] After welding is completed, the support arm plate 31 folds upward, the counterweight slider 42 slides in the opposite direction under its own weight, and the moving rack 43 drives the moving gear 39 in the opposite direction, so that the pull rod limit plate 32 retracts into the positioning port 35, completing the automatic folding and storage, and avoiding interference with subsequent processes.

[0068] The linkage mechanism of counterweight slider 42, moving rack 43, and moving gear 39 directly converts the folding angle of support arm plate 31 into the extension stroke of pull rod limit plate 32; rectangular guide rod 41 and return spring 44 ensure smooth sliding and reliable reset, realize fully automatic guidance and storage, and further improve clamping efficiency and operational safety.

[0069] In another embodiment of the present invention, protective strips 45 located on the side of the tie rod limiting plate 32 are fixedly installed on both of the two support arm plates 31, which are used to cover the blade surface of the tie rod limiting plate 32 when it is stored.

[0070] In this embodiment, when the support arm plate 31 is folded upward, the blade of the pull rod limiting plate 32 retracts inward; at this time, the protective strip 45 fixed to the side of the support arm plate 31 just covers the outer side of the blade, forming a physical barrier to avoid being scratched by the blade; before unfolding, the protective strip 45 automatically moves away as the support arm plate 31 moves downward, without affecting the guiding function.

[0071] In another embodiment of the present invention, an axle 46 is rotatably mounted on the air box 13. The end of the transverse screw 15 located outside the air box 13 and the axle 46 are synchronously driven by a pulley assembly 47. An axle 48 is rotatably mounted on the mounting back plate 7. The axle 48 and the axle 46 are synchronously driven by a pulley assembly 49. An axle 50 is rotatably mounted on the lifting plate 26. The axle 50 and the axle 48 are synchronously driven by a pulley assembly 51. A bevel gear 52 is fixedly mounted on the top of both the axle 50 and the lifting screw 28. The two bevel gears 52 mesh with each other so that when the motor 14 drives the transverse screw 15 to rotate, it synchronously drives the lifting screw 28 to rotate, thereby synchronizing the adsorption fixation with the folding and storage of the support arm plate 31, which facilitates welding operations.

[0072] In this embodiment, motor 14 drives the transverse screw 15 to rotate, which in turn drives the axle 46 on the air box 13 via pulley assembly 47. The axle 46 transmits power to the axle 48 on the mounting back plate 7 via pulley assembly 49, and then to the axle 50 on the lifting plate 26 via pulley assembly 51. The bevel gear 52 at the top of the axle 50 meshes with the bevel gear 52 at the top of the lifting screw 28, so that the lifting screw 28 and the transverse screw 15 can operate synchronously.

[0073] The transverse screw 15 controls the valve plate 16 to open and close the vacuum channel, completing the adsorption and fixation of the circular tube frame 10, the pump body mounting plate 11 and the transverse pull circular tube 12; at the same time, the lifting screw 28 drives the lifting plate 27 to rise and fall, so that the support arm plate 31 and the pull rod limit plate 32 automatically unfold for guidance or fold for storage. The two actions are completed at once by the same motor 14.

[0074] The single motor 14 is linked with the bevel gear 52 through multi-stage pulleys to achieve synchronous movement of vacuum adsorption and guiding mechanism. The structure is compact and the cycle is consistent, which significantly improves clamping efficiency and reduces energy consumption.

[0075] In another embodiment of the present invention, a base plate 53 is provided below the assembly base 1 and the air box 13. A hinge seat 54 is provided on the top of the base plate 53. A support arm 56 is hingedly mounted on the hinge seat 54 using a hinge shaft 55. The support arm 56 is fixedly connected to the assembly base 1. A fixing plate 57 is fixedly mounted on the hinge seat 54. The fixing plate 57 and the bottom of the assembly base 1 are hingedly mounted with the same deflection electric telescopic rod 58, which is used to adjust the angle of the assembly base 1 according to the welding situation.

[0076] In this embodiment, the hinge seat 54 on the base plate 53 is hinged to the support arm 56 through the hinge shaft 55, and the support arm 56 is fixedly connected to the mounting base 1; the two ends of the deflection electric telescopic rod 58 are respectively hinged to the fixed plate 57 and the bottom of the mounting base 1, and after starting, the telescopic rod can drive the mounting base 1 to pitch around the hinge axis.

[0077] Before or during welding, the extension and retraction of the electric telescopic rod 58 is controlled according to the weld position and welding torch posture requirements, so that the mounting base 1 can tilt steplessly within a range of ±30° to achieve the optimal welding angle; after the angle is reached, the telescopic rod self-locks to maintain a stable position.

[0078] In another embodiment of the present invention, a steering wheel 59 is rotatably mounted on the base plate 53, and the hinge seat 54 is fixedly connected to the top of the steering wheel 59. A conical gear ring 60 is fixedly mounted on the steering wheel 59, and the conical gear ring 60 is located outside the hinge seat 54. A power conversion shaft 61 is rotatably mounted on the top of the base plate 53. A second conical gear 62 and a small gear 63 are fixedly sleeved on the power conversion shaft 61. The second conical gear 62 meshes with the conical gear ring 60. A second motor 64 is fixedly mounted on the top of the base plate 53. A large gear 65 is fixedly mounted on the output shaft of the second motor 64. The large gear 65 meshes with the small gear 63 and is used to drive the steering wheel 59 and the mounting seat 1 to adjust the welding direction.

[0079] In this embodiment, the second motor 64 is started, the large gear 65 drives the small gear 63 to rotate, and the power is transmitted to the second bevel gear 62 through the power conversion shaft 61. The second bevel gear 62 drives the bevel gear ring 60 to rotate, so that the steering wheel 59 rotates horizontally on the base plate 53, driving the hinge seat 54 and the assembly seat 1 to rotate synchronously, so as to achieve rapid alignment of the direction to be welded.

[0080] During the turning process, the electric telescopic rod 58 maintains a fixed pitch angle, and the horizontal rotation and vertical tilt angle are superimposed to form any spatial posture; the welding robot or manual welding torch only needs to be in a fixed position to complete multi-directional welding operations without the need to readjust the workpiece position.

[0081] In another embodiment of the present invention, a limiting support plate 66 is fixedly installed on the top of the base plate 53 to limit the tilt angle of the assembly base 1, and a controller 67 is fixedly installed on the assembly base 1 to control the operation of each electrical appliance.

[0082] In this embodiment, when the deflection electric telescopic rod 58 extends or retracts, the mounting base 1 tilts and swings around the hinge shaft 55; when the tilt angle reaches the set limit, the bottom of the mounting base 1 contacts the limiting support plate 66 to form a mechanical hard limit, preventing excessive overturning and ensuring the safety of the equipment and the workpiece.

[0083] The controller 67 is integrated into the side wall of the assembly base 1. It receives welding process parameters in real time and uniformly schedules motor 14, motor 2 64, deflection electric telescopic rod 58 and various vacuum adsorption components to realize tilting, rotation and adsorption operation steps.

[0084] In summary, compared with related technologies, this device achieves multi-directional welding with a single clamping by using three-dimensional vacuum positioning at the bottom, side, and top, a foldable guide arm, synchronous drive by a single motor, and dual-degree-of-freedom adjustment for pitch and rotation. While simplifying the structure and shortening the cycle time, it ensures weld accuracy and operational safety, significantly improving the welding efficiency and automation level of gasoline engine water pump stands.

[0085] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A multi-directional positioning fixture for welding a gasoline engine water pump, characterized in that, include: The assembly base has multiple round tube holders, multiple positioning plates, and two rear support plates fixedly installed on its top. The multiple round tube holders are used to lock into the bottom sides when the round tube frame is placed in. The multiple positioning plates are used to position and support the pump body mounting plate at the welding position between the round tube frames. The pump body mounting plate is placed on the positioning plates. The two rear support plates are located on the same side of the assembly base. Two limiting guide plates are fixedly installed on each of the two rear support plates to limit the width when the round tube frame is placed along the opening, so as to accurately position the horizontally pulled round tube when it is placed in. Both of the rear support plates are fixedly mounted with connecting plates, and the same assembly back plate is fixedly mounted on both connecting plates. A round tube placement plate is fixedly mounted on the assembly back plate. The round tube placement plate has multiple round tube slots for positioning and supporting the horizontally pulled round tubes at the welding positions between the round tube frames. The round tube placement plate is arranged parallel to the limiting guide plates on both sides. An air box and a motor are fixedly mounted on the bottom of the assembly base. A transverse sliding screw is rotatably mounted inside the air box, with one end extending outside the air box and fixedly connected to the output shaft of the motor. A valve plate is slidably mounted inside the air box, threaded onto the transverse sliding screw so that the transverse sliding screw drives the valve plate to slide. The same three-way valve pipe is fixedly mounted on the bottom of the air box and the assembly base. A pressure balance port is opened on the other side of the air box opposite to the three-way valve pipe. An air cavity is opened on the assembly base, and the three-way valve pipe is connected to the air cavity. The system is interconnected, with each of the multiple cylindrical tube holders having an air port 1 connected to the air cavity for adsorbing and fixing the cylindrical tube frame. Each of the multiple positioning plates has an air guide cavity 1 connected to the air cavity, and each of the multiple positioning plates has an air port 2 for adsorbing and fixing the pump body mounting plate. The cylindrical tube placement plate has an air guide cavity 2, and each of the multiple cylindrical tube slots has an air port 3 connected to the air guide cavity 2 for adsorbing and fixing the horizontal cylindrical tube. An air pipe is fixedly installed between the assembly base and the cylindrical tube placement plate to connect the air cavity with the air guide cavity 2 and the air guide cavity 2.

2. The multi-directional positioning fixture for welding gasoline engine water pumps as described in claim 1, characterized in that, Above the circular tube placement plate is a lifting plate fixedly connected to the assembly back plate. A lifting plate is slidably installed between the lifting plate and the circular tube placement plate. A lifting screw is rotatably installed on the lifting plate, and the lifting screw is threaded through the lifting plate to drive the lifting plate to rise and fall. A lifting guide rod is fixedly installed at the bottom of the lifting plate, and the lifting guide rod slides through the lifting plate to guide the lifting plate to rise and fall. Rotating shafts are rotatably installed on both sides of the lifting plate. Support arm plates are fixedly sleeved on both rotating shafts. Pull rod limiting plates are installed on both support arm plates to position the horizontally pulled circular tube when it is placed, so that the horizontally pulled circular tube is correctly placed into the welding position of the circular tube frame. The two support arm plates unfold when the horizontally pulled circular tube is placed, so that the pull rod limiting plates are in the restricted position. The horizontally pulled circular tube is stored after placement.

3. The multi-directional positioning fixture for welding gasoline engine water pumps as described in claim 2, characterized in that, Deflection gears are fixedly fitted on both of the two rotating shafts, and deflection racks are fixedly installed on both sides of the mounting back plate. The two deflection gears mesh with the two deflection racks respectively, so that when the lifting plate rises, the deflection gears drive the rotating shafts and support arm plates to deflect upwards, and deflect downwards when it descends.

4. The multi-directional positioning fixture for welding gasoline engine water pumps as described in claim 1, characterized in that, The shape of the positioning plate is adapted to the pump body mounting plate, and the opening position of the second air port is staggered from the mounting hole on the pump body mounting plate.

5. The multi-directional positioning fixture for welding gasoline engine water pumps as described in claim 1, characterized in that, The two corresponding limiting guide plates form an insertion channel, and the side of the two limiting guide plates away from the rear support plate is the insertion side. The round tube placement plate and the rear support plate are located on the same side.

6. The multi-directional positioning fixture for welding gasoline engine water pumps as described in claim 1, characterized in that, The position of the trachea is offset from the placement and removal trajectory of the circular tube frame, and the trachea is located on the rear side after the circular tube frame is installed.

7. The multi-directional positioning fixture for welding gasoline engine water pumps as described in claim 2, characterized in that, The support arm plate has an L-shaped structure, the lifting plate and the hoisting plate are staggered from the circular tube frame, and the lifting guide rod is a rectangular rod.

8. The multi-directional positioning fixture for welding gasoline engine water pumps as described in claim 2, characterized in that, The bottom of the pull rod limiting plate is set with a blade-like surface, and one side of it located at the end of the horizontal pull tube is a flat surface, which is used to guide the end face when the horizontal pull tube is inserted.

9. The multi-directional positioning fixture for welding gasoline engine water pumps as described in claim 2, characterized in that, The deflection angle of the outrigger plate is ±90°.

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