A kind of automobile sleeve welding positioning fixture

Abstract

The present invention belongs to the technical field of automobile bracket sleeve welding, and provides an automobile sleeve welding positioning fixture, including a device frame, which is a "U"-shaped structure with one side open; a pair of fixture cylinders, respectively fixedly mounted on the upper and lower sides of the device frame; a pair of connecting frames, respectively fixedly mounted on the output rod ends of a pair of the fixture cylinders; a pair of chuck seats, respectively fixedly mounted on the corresponding sides of a pair of connecting frames, both of which can be used to fix the sleeve to be welded; a synchronous clamping adjustment mechanism, provided on the pair of chuck seats, is used to drive the chuck seats to position and fix the sleeve. The automobile sleeve welding positioning fixture provided by this solution can ensure the position accuracy of the sleeve during the welding process through the precise positioning and stable clamping of the fixture, thereby improving the welding quality; the outward-expanding support plate on the chuck seat of the fixture is fixed by expanding outward from the inside, which effectively avoids the problem of traditional fixtures blocking the line of sight and welding route.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile bracket sleeve welding, and in particular relates to an automobile sleeve welding positioning fixture. Background Art

[0002] In the automotive manufacturing industry, welding is a critical step in connecting auto parts. With the continuous advancement of automotive technology, the requirements for welding precision and quality are increasing. The welding positioning of automotive sleeves is particularly important, as it not only affects the quality of the connection but also the overall performance and service life of the vehicle.

[0003] Traditional automotive sleeve welding positioning fixtures usually use mechanical clamping or manual adjustment. However, whether mechanical clamping or manual adjustment, external clamping is often used. During use, external clamping is convenient, but it is easy to block the line of sight and the welding operation route, which affects the welding yield.

[0004] The engine bracket sleeve welding positioning fixture disclosed in the existing document CN114749864B has the aforementioned problems. Summary of the Invention

[0005] The present invention provides an automobile sleeve welding positioning fixture, which aims to solve the problem raised in the above background art that the currently used clamping method easily blocks the sight and welding route.

[0006] To solve the above problems, the present invention is implemented as follows: a welding positioning fixture for an automobile sleeve, comprising: a device frame, which is a "U"-shaped structure with an open side; a pair of fixture cylinders, respectively fixedly mounted on the upper and lower sides of the device frame; a pair of connecting frames, respectively fixedly mounted on the output rod ends of a pair of the fixture cylinders; a pair of chuck seats, respectively fixedly mounted on the corresponding sides of a pair of connecting frames, both of which can be used to fix the welded sleeve; a synchronous clamping adjustment mechanism, provided on a pair of the chuck seats, for driving the chuck seats to position and fix the sleeve; the other side of the chuck seat relative to the connecting frame is the positioning side, and the positioning side surface of the chuck seat is slidably provided with a plurality of outward-expanding inner support plates, which are used to cooperate in expanding and positioning from the inside of the sleeve outward.

[0007] Preferably, the chuck seat is provided with a plurality of sliding grooves on one side of the plurality of outward-expanded inner support pieces, and the plurality of sliding grooves correspond to the plurality of outward-expanded inner support pieces respectively. A driving screw can be rotatably installed in the plurality of sliding grooves, and a sliding block is threadedly sleeved on the plurality of driving screws. The plurality of sliding blocks are respectively fixedly connected to the plurality of outward-expanded inner support pieces. A transmission cavity is provided in the middle of the chuck seat, and the transmission cavity is provided with a center shaft rotatably installed on one side of the connecting frame. A driving bevel gear is fixedly installed on one end of the center shaft located in the transmission cavity, and a driven bevel gear is fixedly installed on one end of the plurality of driving screws located in the transmission cavity, and the plurality of driven bevel gears are meshed with the driving bevel gear.

[0008] The two chucks are connected by a plurality of guide wheels, each of which is connected to the two chuck wheels, and the two chuck wheels are connected by a plurality of guide wheels, each of which is connected to the two chuck wheels.

[0009] Preferably, the device frame is provided with an escape opening on one side of the support seat, the escape opening is staggered above the support seat, and the device frame is provided with a power mechanism on one side of the escape opening for driving the connecting main shaft to rotate.

[0010] Preferably, the power mechanism includes an engaging cylinder fixedly mounted on the outside of the device frame, the engaging cylinder is located on a side of the device frame where an avoidance opening is opened, a motor seat is slidably mounted in the avoidance opening, the motor seat is fixedly connected to the output rod of the engaging cylinder, a driving motor is fixedly mounted on the motor seat, a driving spindle is fixedly mounted on the output shaft of the driving motor, the driving spindle extends to the top of the support seat, a conical gear disk is fixedly sleeved on the connecting spindle, the conical gear disk is located above the driving spindle, a separation bevel gear is fixedly mounted on one end of the driving spindle located on the connecting spindle, and the separation bevel gear and the conical gear disk can be separated or meshed.

[0011] Preferably, the output rods of the pair of clamp oil cylinders can slide through the upper and lower sides of the device frame respectively, and the pair of clamp oil cylinders are located on the same longitudinal line.

[0012] Preferably, the chuck seat is a perfect circular structure, and the plurality of outwardly expanding inner supporting plates are evenly distributed in a circular array.

[0013] Preferably, the chuck seat is a polygonal structure, and the plurality of outwardly expanding inner supporting plates are respectively arranged along polygonal directions and are distributed in a circular array as a whole.

[0014] Preferably, the outer side of the outward-expanding inner support piece is an arc-shaped surface, and the outer upper side is an inclined surface structure.

[0015] Preferably, a cylinder seat is fixedly mounted on the side of the device frame, and the cylinder seat is fixedly connected to the engaging cylinder.

[0016] Beneficial effects: Compared with the existing technology, this device can ensure the position accuracy of the sleeve during the welding process through the precise positioning and stable clamping of the clamp, thereby improving the welding quality; the outward-expanding inner support piece on the clamp's chuck seat is fixed by expanding outward from the inside, effectively avoiding the problem of traditional clamps blocking the line of sight and welding route, and the synchronous clamping adjustment mechanism is flexibly adjusted to drive a pair of chuck seats to move together, making the fixing operation simpler. Since the sleeve is precisely positioned and stably clamped during the welding process, the welding quality and the connection strength of automobile parts can be ensured, thereby improving the overall performance and service life of the automobile. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main three-dimensional structure of an automobile sleeve welding positioning fixture provided by the present invention;

[0018] Figure 2 This is a rear-view stereoscopic structural diagram of an automobile sleeve welding positioning fixture provided by the present invention;

[0019] Figure 3 This is a schematic diagram of the main cross-sectional structure of an automobile sleeve welding positioning fixture provided by the present invention;

[0020] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part A shown in FIG;

[0021] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part B shown in FIG;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting main shaft part in the present invention;

[0023] Figure 7Schematic diagram of the three-dimensional structure of the chuck seat portion of the present invention;

[0024] Figure 8 It is a schematic diagram of the main cross-sectional structure of the chuck seat part of the present invention;

[0025] Figure 9 for Figure 8 Schematic diagram of the enlarged structure of part C shown in ;

[0026] Figure 10 This is a schematic diagram of the main cross-sectional structure of the outward-expanding support piece of the present invention;

[0027] Figure 11 It is a schematic diagram of the three-dimensional structure of the power mechanism and the connecting secondary shaft part in the present invention.

[0028] Figure 1: 1. Device frame; 2. Clamp oil cylinder; 3. Connecting frame; 4. Chuck seat; 5. Outward expansion inner support plate; 6. Slide groove; 7. Drive screw; 8. Slide block; 9. Transmission cavity; 10. Center shaft; 11. Driving bevel gear; 12. Driven bevel gear; 13. Support seat; 14. Connecting spindle; 15. Rectangular slide hole; 16. Rectangular long shaft; 17. Synchronous plate; 18. Short circular shaft; 19. Driving sprocket 1; 20. Driven sprocket 1; 21. Chain 1; 22. Avoidance; 23. Engaging oil cylinder; 24. Motor seat; 25. Driving motor; 26. Driving spindle; 27 , conical gear disc; 28. Separating bevel gear; 29. ​​Threaded column; 30. Assembly hole; 31. Ball seat; 32. Ball; 33. Nut; 34. Pressure column; 35. Support spring; 36. Longitudinal support plate; 37. U-shaped support plate; 38. Storage groove; 39. Sliding plate; 40. Driving wheel; 41. Static support; 42. Dynamic support; 43. Return spring; 44. Dynamic interference seat; 45. Static interference seat; 46. Connecting countershaft; 47. Rectangular short shaft; 48. Transmission bevel gear; 49. Driving sprocket 2; 50. Driven sprocket 2; 51. Chain 2; 52. Bracket seat. DETAILED DESCRIPTION

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the description of the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order; the terms "inside", "outside", "left", and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0030] This embodiment provides a kind of automobile sleeve welding positioning fixture, such as Figure 1-11 As shown, the automobile sleeve welding positioning fixture includes: a device frame 1, which is a "U"-shaped structure with an open side; a pair of fixture cylinders 2, respectively fixedly mounted on the upper and lower sides of the device frame 1; a pair of connecting frames 3, respectively fixedly mounted on the output rod ends of a pair of the fixture cylinders 2; a pair of chuck seats 4, respectively fixedly mounted on the corresponding sides of a pair of connecting frames 3, both of which can be used to fix the welded sleeve; a synchronous clamping adjustment mechanism, provided on a pair of the chuck seats 4, for driving the chuck seats 4 to position and fix the sleeve; the other side of the chuck seat 4 relative to the connecting frame 3 is the positioning side, and the positioning side surface of the chuck seat 4 is slidably provided with a plurality of outward-expanding inner support plates 5, which are used to cooperate with each other to expand and position from the inside of the sleeve.

[0031] In this embodiment, when in use, the device frame 1 is fixed on the welding workbench to ensure that the opening of the "U"-shaped structure faces the welding area, and then the two sections of the sleeve to be welded are fixed on the two chuck seats 4 respectively. The design of the chuck seat 4 has been enhanced, especially for the positioning and fixing method of the sleeve. The chuck seat 4 is on the other side relative to the connecting frame 3 as the positioning side, and the surface of the positioning side is slidably provided with a plurality of outward-expanding inner support plates 5. The function of these outward-expanding inner support plates 5 is to cooperate and expand outward from the inside of the sleeve to achieve precise positioning of the sleeve. Both chuck seats 4 use an internal outward expansion method to fix the sleeve. Finally, the output rods of the two clamp cylinders 2 are extended to dock the two sections of the sleeve. Through the synchronous clamping adjustment mechanism, a pair of common actions can be synchronously driven to achieve the common fixation of the two sleeves.

[0032] Adjustment of the outer expansion inner support pieces 5: According to the size and shape of the sleeve, the outer expansion inner support pieces 5 are controlled to expand outward from the inside of the sleeve until they fit tightly against the inner wall of the sleeve. This internal expansion method ensures the stability of the sleeve and the accuracy of positioning.

[0033] The positioning side design of the chuck base 4 allows the outward-expanding inner support plates 5 to expand outward from the interior of the sleeve, effectively avoiding obstruction of vision and welding routes. Furthermore, because the outward-expanding inner support plates 5 are slidable, they can be flexibly adjusted to accommodate sleeves of different sizes, thereby increasing the adaptability and flexibility of the clamp.

[0034] After the sleeve is positioned and fixed, welding can be carried out. Since the sleeve has been accurately positioned and fixed, the stability of the sleeve and the welding accuracy can be ensured during the welding process.

[0035] This clamp clamps and positions the sleeve by retracting and expanding the clamp cylinder 2, driving the connecting frame 3 and the chuck base 4. The synchronous clamping adjustment mechanism ensures that the two chuck bases 4 can move synchronously, ensuring uniform distribution of clamping force and precise positioning of the sleeve.

[0036] This fixture is suitable for sleeve welding processes in the automotive manufacturing industry, especially for sleeve welding tasks that require high-precision positioning and stable clamping.

[0037] Through the precise positioning and stable clamping of the fixture, the position accuracy of the sleeve during the welding process can be ensured, thereby improving the welding quality.

[0038] The use of mechanized operation instead of manual operation reduces the labor intensity of operators and reduces labor costs.

[0039] The outward-expanding support piece 5 on the chuck seat 4 of the clamp is fixed by expanding outward from the inside, which effectively avoids the problem of traditional clamps blocking the line of sight and welding route. The synchronous clamping adjustment mechanism is flexibly adjusted to drive a pair of chuck seats 4 to move together, and the fixing operation is simpler. Since the sleeve is accurately positioned and stably clamped during the welding process, the welding quality and the connection strength of automobile parts can be ensured, thereby improving the overall performance and service life of the automobile.

[0040] In a further preferred embodiment, the chuck seat 4 is provided with a plurality of sliding grooves 6 on one side of the plurality of outward-expanding inner support pieces 5, and the plurality of sliding grooves 6 correspond to the plurality of outward-expanding inner support pieces 5 one by one, and a driving screw 7 can be rotatably installed in the plurality of sliding grooves 6, and a sliding block 8 is threadedly sleeved on the plurality of driving screws 7, and the plurality of sliding blocks 8 are respectively fixedly connected to the plurality of outward-expanding inner support pieces 5, and a transmission cavity 9 is provided in the middle of the chuck seat 4, and the transmission cavity 9 is provided with a central shaft 10 rotatably installed on one side of the connecting frame 3, and a driving bevel gear 11 is fixedly installed on one end of the central shaft 10 located in the transmission cavity 9, and a driven bevel gear 12 is fixedly installed on one end of the plurality of driving screws 7 located in the transmission cavity 9, and the plurality of driven bevel gears 12 are all meshed with the driving bevel gear 11.

[0041] In this embodiment, the chuck base 4 has a plurality of sliding grooves 6 on one side corresponding to the plurality of outwardly expanding inner support pieces 5. These sliding grooves 6 correspond one to one with the outwardly expanding inner support pieces 5. A drive screw 7 is rotatably mounted in each sliding groove 6. A sliding block 8 is threadedly mounted on the drive screw 7 and fixedly connected to the outwardly expanding inner support piece 5.

[0042] A transmission chamber 9 is also defined in the center of the chuck base 4, located on one side of the connecting frame 3. A central shaft 10 is rotatably mounted within the transmission chamber 9. A driving bevel gear 11 is fixedly mounted at one end of the central shaft 10, while driven bevel gears 12 are fixedly mounted at each end of the multiple drive screws 7 located within the transmission chamber 9. These driven bevel gears 12 mesh with the driving bevel gear 11, forming a bevel gear transmission system.

[0043] During fixed operation, by rotating the central shaft 10, the driving bevel gear 11 rotates the meshing driven bevel gear 12. Since the driven bevel gear 12 is fixedly connected to the drive screw 7, the drive screw 7 also rotates synchronously. Since the sliding block 8 is threadedly connected to the drive screw 7, the rotation of the drive screw 7 causes the sliding block 8 to move within the sliding groove 6, thereby driving the outward-expanding inner support plate 5 to expand outward from the interior of the sleeve or contract inward to accommodate sleeves of different sizes.

[0044] After the sleeve is accurately positioned and stably clamped, the welding operation is carried out. Since the sleeve has been accurately positioned and fixed, the stability of the sleeve and the welding accuracy can be ensured during the welding process.

[0045] A bevel gear transmission system enables synchronized adjustment of the outward-expanding inner support plates 5. When the center shaft 10 rotates, the driving bevel gear 11 drives all meshing driven bevel gears 12, which in turn synchronizes the rotation of all drive screws 7. Because the sliding block 8 is threadedly connected to the drive screws 7, rotation of the drive screws 7 causes the sliding block 8 to move within the sliding groove 6, thereby driving the expansion or contraction of the outward-expanding inner support plates 5. This design not only improves the adaptability and flexibility of the clamp but also simplifies operation.

[0046] The position of the outward-expanding inner support piece 5 is adjusted by a bevel gear transmission system so that the clamp can adapt to sleeves of different sizes and shapes.

[0047] The use of the bevel gear transmission system greatly simplifies the adjustment process of the outward-expanding inner support piece 5 and improves work efficiency.

[0048] Because the sleeve is more accurately positioned and stably clamped during the welding process, the connection strength of automotive parts is further improved.

[0049] In a further preferred embodiment, the synchronous clamping adjustment mechanism includes a support seat 13 fixedly mounted on the longitudinal inner wall of the device frame 1, the support seat 13 and the clamp cylinder 2 are arranged vertically, the support seat 13 is staggered with a pair of the chuck seats 4, a connecting spindle 14 is longitudinally rotatably mounted on the support seat 13, the connecting spindle 14 is arranged parallel to the pair of the clamp cylinders 2, a rectangular sliding hole 15 is opened through the connecting spindle 14, a rectangular long shaft 16 is slidably mounted in the interior of the rectangular sliding hole 15 up and down, and the two rectangular long shafts 16 are provided with two ends away from each other. The chuck seat 4 is fixedly connected to a synchronization plate 17 so that when the chuck seat 4 moves, the synchronization plate 17 is synchronously driven to move and drive the rectangular long shaft 16 to slide along the rectangular sliding hole 15. Short circular shafts 18 can be rotatably installed on the two synchronization plates 17. The two short circular shafts 18 are respectively fixedly connected to the ends of the two rectangular long shafts 16 that are away from each other. The other ends of the two short circular shafts 18 are fixedly sleeved with a driving sprocket 19. The middle shafts 10 of the two chuck seats 4 are fixedly sleeved with a driven sprocket 20. The corresponding driving sprocket 19 and the driven sprocket 20 are sleeved with the same chain 21.

[0050] In this embodiment, a synchronous clamping adjustment mechanism is introduced to ensure that the two chuck seats 4 can move synchronously, thereby providing a more stable and precise clamping effect.

[0051] The support seat 13 is fixedly mounted on the longitudinal inner wall of the device frame 1 , is vertically arranged with respect to the clamp cylinder 2 , and is staggered with respect to a pair of chuck seats 4 .

[0052] The connecting spindle 14 is longitudinally rotatably mounted on the support base 13 and is arranged parallel to a pair of clamp oil cylinders 2. A rectangular sliding hole 15 is provided through the connecting spindle 14.

[0053] Two rectangular major shafts 16 are slidably installed up and down in the inside of the rectangular sliding hole 15. One end away from each other is provided with a synchronous plate 17, and these synchronous plates 17 are fixedly connected with the two chuck seats 4 respectively.

[0054] When the chuck base 4 moves, they synchronously drive the synchronous plate 17 to move, and further drive the rectangular long shaft 16 to slide along the rectangular sliding hole 15.

[0055] A short circular shaft 18 can be rotatably mounted on both synchronization plates 17. The short circular shaft 18 is fixedly connected to one end of the rectangular long shaft 16 that is away from each other. The other ends of the two short circular shafts 18 are fixedly sleeved with a driving sprocket 19, and the middle shafts 10 of the two chuck seats 4 are fixedly sleeved with a driven sprocket 20. The corresponding driving sprocket 19 and the driven sprocket 20 are sleeved with the same chain 21, forming a chain transmission system.

[0056] When the clamp oil cylinder 2 is started, the chuck seat 4 is pushed to move toward the middle. The movement of the chuck seat 4 will synchronously drive the synchronous plate 17 to move, and then drive the rectangular major shaft 16 to slide in the rectangular sliding hole 15.

[0057] As the synchronizing plate 17 moves, the short circular shaft 18 and driving sprocket 19 also move accordingly. To actuate the clamping, simply rotate the connecting spindle 14, causing it to drive the rectangular long shaft 16, the short circular shaft 18, and the driving sprocket 19 to rotate. Due to the connection of chain 1 21, the driven sprocket 1 20 also rotates, thereby driving the center shaft 10 of the chuck base 4. Through the chain transmission system, the center shafts 10 of the two chuck bases 4 rotate synchronously, ensuring that the two chuck bases 4 can move and adjust synchronously, improving the stability and precision of the clamping.

[0058] By introducing a synchronized clamping adjustment mechanism, the movement of the two chucks 4 is synchronized and controlled using a chain drive system. The interaction of the rectangular long shaft 16, the short circular shaft 18, the driving sprocket 19, the driven sprocket 20, and the chain 21 ensures synchronized adjustment of the two chucks 4. This design improves clamping stability and precision, making it particularly suitable for welding tasks requiring high-precision clamping and positioning.

[0059] In a further preferred embodiment, the device frame 1 is provided with an escape opening 22 on one side of the support seat 13, and the escape opening 22 is staggered above the support seat 13. The device frame 1 is provided with a power mechanism on one side of the escape opening 22 for driving the connecting main shaft 14 to rotate.

[0060] In this embodiment, in order to achieve effective driving of the connecting spindle 14 and simplify the mechanical structure, a series of optimized designs are performed on the device frame 1.

[0061] A clearance opening 22 is provided on one side of the device frame 1 on the support base 13. The position of the clearance opening 22 is deliberately staggered above the support base 13 to ensure that sufficient space is provided for the power mechanism without affecting the operation of the support base 13 and the components thereon.

[0062] A power mechanism is installed on the side of the device frame 1, located near the escape opening 22. This mechanism's primary function is to drive the connecting spindle 14. Precise control of the power mechanism ensures that the connecting spindle 14 rotates at the predetermined speed and direction, thereby driving the entire synchronous clamping and adjustment mechanism.

[0063] When the connecting main shaft 14 needs to be driven to rotate, the power mechanism is started. The power mechanism transmits power to the connecting main shaft 14 through a transmission device (such as a gear, a belt, etc.), causing it to start rotating.

[0064] As the connecting spindle 14 rotates, the rectangular long axis 16 ensures that the center shafts 10 of the two chuck seats 4 rotate synchronously, thereby achieving synchronous clamping or loosening of the chuck seats 4.

[0065] The provision of a clearance 22 and a power mechanism on the device frame 1 facilitates the driving of the connecting spindle 14. The power mechanism transmits power to the connecting spindle 14 via a transmission device, driving its rotation. The rotation of the connecting spindle 14 synchronizes the clamping and release of the chuck base 4. This design not only simplifies the mechanical structure but also improves clamping stability and precision.

[0066] In a further preferred embodiment, the power mechanism includes an engaging cylinder 23 fixedly mounted on the outside of the device frame 1, the engaging cylinder 23 is located on a side of the device frame 1 where an avoidance opening 22 is opened, and a motor seat 24 is slidably mounted in the avoidance opening 22, the motor seat 24 is fixedly connected to the output rod of the engaging cylinder 23, a driving motor 25 is fixedly mounted on the motor seat 24, a driving spindle 26 is fixedly mounted on the output shaft of the driving motor 25, the driving spindle 26 extends to above the support seat 13, a conical gear disc 27 is fixedly sleeved on the connecting spindle 14, the conical gear disc 27 is located above the driving spindle 26, and a separation bevel gear 28 is fixedly mounted on one end of the driving spindle 26 located on the connecting spindle 14, and the separation bevel gear 28 and the conical gear disc 27 can be separated or engaged.

[0067] In this embodiment, the engagement cylinder 23 is fixedly mounted on the outside of the device frame 1, and is located on the side of the device frame 1 where the avoidance opening 22 is opened. The engagement cylinder 23 is responsible for driving the motor base 24 to slide.

[0068] The motor base 24 is slidably mounted in the avoidance opening 22. The motor base 24 is fixedly connected to the output rod of the engagement cylinder 23 to ensure that the engagement cylinder 23 can drive the motor base 24 to perform precise linear motion.

[0069] The driving motor 25 is fixed on the motor base 24 to provide rotational power.

[0070] The driving spindle 26 is fixedly connected to the output shaft of the driving motor 25 and extends to the top of the support base 13 .

[0071] The conical gear disc 27 is fixedly mounted on the connecting spindle 14 and is located above the driving spindle 26 .

[0072] The separating bevel gear 28 is fixed to the end of the driving main shaft 26 connected to the main shaft 14 and can be separated from or engaged with the bevel gear disc 27 .

[0073] Start the engagement cylinder 23, and push the motor base 24 to slide through its output rod, so that the separation bevel gear 28 is engaged with the bevel gear disc 27. It is engaged when the main shaft 14 needs to be driven to rotate, and the drive motor 25 is turned off or separated when it is not needed.

[0074] After the meshing is completed, the drive motor 25 is started. The output shaft of the drive motor 25 drives the drive spindle 26 to rotate. Since the separation bevel gear 28 is meshed with the bevel gear disc 27, the rotation of the drive spindle 26 drives the bevel gear disc 27 to rotate, thereby driving the connection spindle 14 to rotate, realizing the synchronous clamping or loosening of the chuck.

[0075] By using the meshing cylinder 23 and the drive motor 25 in conjunction with each other, precise control of the connecting spindle 14 is achieved. The meshing cylinder 23 ensures the precise meshing of the separating bevel gear 28 and the bevel gear disc 27, while the drive motor 25 provides stable rotational power.

[0076] In a further preferred embodiment, the output rods of the pair of clamp oil cylinders 2 can slide through the upper and lower sides of the device frame 1 respectively, and the pair of clamp oil cylinders 2 are located on the same longitudinal line.

[0077] In this embodiment, the output rods of the pair of clamp oil cylinders 2 can slide through the upper and lower sides of the device frame 1. This means that the output rods of the clamp oil cylinders 2 can slide along the upper and lower sides of the device frame 1, thereby driving the clamp to open and close.

[0078] The device frame 1 provides a foundation for the installation and support of the clamp cylinder 2, ensuring that the clamp cylinder 2 can work stably. A pair of clamp cylinders 2 are located on the same longitudinal line. This design can ensure that the clamp is evenly stressed during the opening and closing process, thereby improving the stability and accuracy of the clamping.

[0079] When the sleeve workpiece needs to be clamped and docked, the clamp cylinder 2 is controlled to extend and retract, causing its output rod to slide on the upper and lower sides of the device frame 1. Since the pair of clamp cylinders 2 are located on the same longitudinal line, they can work synchronously, ensuring that the two chuck seats 4 can smoothly move closer or farther away, achieving stable clamping of the workpiece.

[0080] The clamp cylinder 2 operates on a hydraulic or pneumatic transmission principle. When liquid or gas is injected into the cylinder, a certain pressure is generated, causing the piston rod (i.e., output rod) of the clamp cylinder 2 to extend or retract. By controlling the flow rate and pressure of the liquid or gas, the extension or retraction speed of the clamp cylinder 2 can be controlled, thereby achieving precise control over the opening and closing of the clamp.

[0081] In a further preferred embodiment, the chuck seat 4 is a perfect circular structure, and the plurality of outwardly expanding inner support plates 5 are evenly distributed in a circular array.

[0082] In this embodiment, the chuck seat 4 is designed as a perfect circular structure, serving as a supporting base for the outward-expanding inner support piece 5 .

[0083] The plurality of outwardly expanding inner supporting pieces 5 are evenly distributed in a circular array on the chuck base 4. This distribution ensures that during the clamping process, each outwardly expanding inner supporting piece 5 can be evenly stressed, thereby improving the stability and uniformity of the clamping.

[0084] When clamping a workpiece, the chuck base 4 is driven by the rotation of the spindle 14 to move the outward and inward expansion plates 5. Because the outward and inward expansion plates 5 are evenly distributed in a circular array, they can simultaneously and evenly contact the workpiece surface, achieving stable and uniform clamping.

[0085] In a further preferred embodiment, the chuck seat 4 is a polygonal structure, and the plurality of outwardly expanding inner supporting plates 5 are respectively arranged along polygonal directions and are distributed in a circular array as a whole.

[0086] In this embodiment, the chuck seat 4 is designed to be a polygonal structure, such as a quadrilateral, a hexagon, etc., which serves as a supporting base for the outward-expanding inner support sheet 5 .

[0087] Multiple outward-expanding inner support pieces 5 are respectively arranged along the polygonal directions of the chuck seat 4, and are evenly distributed in a circular array as a whole. This design not only takes into account the stability of the clamping, but also ensures the uniform distribution of the clamping force.

[0088] When clamping a workpiece, the chuck base 4 is driven by the rotation of the connected spindle 14, driving the outward and inward expansion plates 5 to move outward or inward. Because the outward and inward expansion plates 5 are arranged along the polygonal directions of the chuck base 4 and are distributed in a circular array, they can simultaneously and evenly contact the workpiece surface, achieving stable and uniform clamping.

[0089] In a further preferred embodiment, the outer side of the outward-expanding inner support piece 5 is an arc-shaped surface, and the outer upper side is an inclined surface structure.

[0090] In this embodiment, the outer side of the outward-expanding inner support piece 5 is designed as an arc surface. This design enables the outward-expanding inner support piece 5 to better fit the workpiece surface when clamping the workpiece, improving the stability and uniformity of the clamping. The upper outer side is designed as a bevel structure to facilitate the introduction of the sleeve during installation.

[0091] When clamping a workpiece, the outward-expanding inner support plate 5 moves outward or inward in response to the movement of the chuck base 4. Due to its curved outer surface, the outward-expanding inner support plate 5 fits more closely to the workpiece surface, achieving stable clamping. Furthermore, the upper outer bevel provides guidance and self-positioning during the clamping process, allowing the outward-expanding inner support plate 5 to more accurately engage and fit the workpiece.

[0092] In a further preferred embodiment, a cylinder seat is fixedly installed on the side of the device frame 1, and the cylinder seat is fixedly connected to the engaging cylinder 23.

[0093] In this embodiment, the device frame 1 serves as the basic structure of the entire device, providing support and fixing functions for other components.

[0094] The oil cylinder seat is installed on the side of the device frame 1 for fixing and supporting the engagement oil cylinder 23. The design of the oil cylinder seat ensures the stability of the engagement oil cylinder 23.

[0095] During use, the action of clamping or releasing the workpiece can be achieved by controlling the extension and contraction of the piston rod of the engagement cylinder 23. Since the engagement cylinder 23 is fixedly connected to the cylinder base, the stability of the engagement cylinder 23 during the clamping process can be ensured, thereby improving the clamping accuracy and efficiency.

[0096] In order to further improve the use effect of this device, in addition to the above scheme, this scheme also has the following embodiments:

[0097] In another embodiment of the present invention, a threaded column 29 is extended from the inner side of each of the plurality of the outward-expanding inner support pieces 5, and an assembly hole 30 is opened on the outward-expanding inner support piece 5 to pass through the threaded column 29. A ball seat 31 and a ball 32 are movably provided in the assembly hole 30. Part of the ball 32 extends to the outside of the outward-expanding inner support piece 5 for contacting the inner wall of the sleeve. The ball 32 is movably connected to the ball seat 31, and a nut 33 is threadedly sleeved on the threaded column 29. A pressure column 34 fixedly connected to the inner side of the nut 33 is slidably provided in the assembly hole 30, and a support spring 35 is provided between the ball seat 31 and the pressure column 34.

[0098] In this embodiment, the multiple outwardly extending inner support pieces 5 are designed to have threaded studs 29 extending from their inner sides. These outwardly extending inner support pieces 5 also have mounting holes 30 extending through the threaded studs 29. A ball seat 31 and a ball 32 are movably mounted within the mounting holes 30. Part of the ball 32 extends outside the outwardly extending inner support piece 5, allowing it to contact the inner wall of the sleeve. The ball 32 is movably connected to the ball seat 31, allowing it to roll freely within the restraint of the ball seat 31.

[0099] A nut 33 is threadedly sleeved on the threaded column 29, which means that the nut 33 can be moved along the threaded column 29 by rotating. A pressure post 34 is slidably mounted in the assembly hole 30 and fixedly connected to the inner side of the nut 33. This pressure post 34 moves as the nut 33 rotates.

[0100] A support spring 35 is provided between the ball seat 31 and the pressure column 34. The support spring 35 is used to provide an outward thrust to push the ball 32 toward the inner wall of the sleeve, thereby ensuring that the ball 32 always maintains good contact with the inner wall of the sleeve.

[0101] When the sleeve is fixed, the ball 32 contacts the inner wall of the sleeve, ensuring that the sleeve can also rotate while being welded and fixed, making it easier to rotate the sleeve for welding. Under the action of the support spring 35, the friction is reduced by rolling, and the pressure column 34 can be moved by rotating the nut 33. Because the pressure column 34 is fixedly connected to the nut 33, its movement compresses or loosens the support spring 35, thereby controlling the pressure of the ball seat 31 on the ball 32, thereby achieving the desired adjustment of the rolling sensitivity of the ball 32 and the required force of the pressure against the inner wall of the sleeve. Combined with the displacement and expansion control of the outward-expanding inner support plate 5, the overall use is more precise.

[0102] The U-shaped support plate 37 is fixedly mounted on one side of the motor base 24 located in the device frame 1, and the longitudinal support plate 36 is rotatably connected to the driving main shaft 26. The bottom of the longitudinal support plate 36 is fixedly mounted with a U-shaped support plate 37, and the U-shaped support plate 37 is located above the support seat 13. One side of the U-shaped support plate 37 is slidably in contact with the inner wall of the device frame 1. The U-shaped support plate 37 is located outside the connecting main shaft 14, and a receiving groove 38 is opened on one side of the clamp cylinder 2. A sliding plate 39 is slidably mounted in the receiving groove 38. The part of the sliding plate 39 located outside the U-shaped support plate 37 is rotatably mounted with a driving wheel 40 using a wheel axle. The outer edge of the driving wheel 40 extends to the outside of the sliding plate 39 so that it can drive the sleeve to rotate after contacting the sleeve. The top of the U-shaped support plate 37 is fixedly mounted with a static support 41. A dynamic support 42 is provided between the wheel 40 and the static support 41, and the bottom of the dynamic support 42 is fixedly connected to the top of the sliding plate 39, and a return spring 43 is fixedly installed between the static support 41 and the dynamic support 42. The bottom of the sliding plate 39 outside the U-shaped support plate 37 is fixedly installed with a dynamic interference seat 44, and the top of the support seat 13 is fixedly installed with a static interference seat 45. The side where the dynamic interference seat 44 and the static interference seat 45 contact is a guide inclined surface, so that when the U-shaped support plate 37 and the sliding plate 39 descend, the dynamic interference seat 44 and the static interference seat 45 interact with each other to make the sliding plate 39 slide out of the U-shaped support plate 37, and the static support 41 and the dynamic support 42 expand the distance, otherwise they are reset under the action of the return spring 43, and the sliding plate 39 is flush with the outside of the dynamic interference seat 44, and the outside of the static interference seat 45 shall not exceed the outer longitudinal surface of the dynamic interference seat 44.

[0103] In this embodiment, a longitudinal support plate 36 is fixedly mounted on one side of the motor base 24 within the device frame 1. This longitudinal support plate 36 is rotatably connected to the drive spindle 26 via a connection, ensuring stable rotation of the drive spindle 26 thereon. A U-shaped support plate 37 is fixedly mounted at the bottom of the longitudinal support plate 36. This U-shaped support plate 37 is located above the support base 13, with one side of the U-shaped support plate 37 in slidable contact with the inner wall of the device frame 1 to accommodate position changes during different operations.

[0104] The U-shaped support plate 37 is located outside the connecting spindle 14 to avoid affecting the operation of the connecting spindle 14, ensuring convenient and safe operation. A storage slot 38 is provided on one side of the U-shaped support plate 37, i.e., on the side of the clamp cylinder 2. A sliding plate 39 is slidably mounted within this storage slot 38. The portion of the sliding plate 39 outside the U-shaped support plate 37 is rotatably mounted with a drive wheel 40 using an axle. The outer edge of the drive wheel 40 extends outside the sliding plate 39. When it contacts the sleeve, it can drive the sleeve to rotate, facilitating welding. During welding, the sleeve can be automatically driven to rotate, and synchronous rotation can be achieved by simply pre-welding a point between the two sleeves.

[0105] To ensure stable operation of the sliding plate 39 and the drive wheel 40, a static support 41 is fixedly mounted on the top of the U-shaped support plate 37. A dynamic support 42 is provided between the static support 41 and the drive wheel 40, with its bottom fixedly connected to the top of the sliding plate 39. A return spring 43 is fixedly mounted between the static support 41 and the dynamic support 42 to provide a return force when needed.

[0106] A dynamic interference seat 44 is fixedly installed at the bottom of the sliding plate 39 outside the U-shaped support plate 37, while a static interference seat 45 is fixedly installed on the top of the support seat 13. The design of these two interference seats is very clever, and their contacting sides are both guide slopes. When the U-shaped support plate 37 and the sliding plate 39 descend, the dynamic interference seat 44 and the static interference seat 45 will interact with each other, causing the sliding plate 39 to slide out of the U-shaped support plate 37. At the same time, the distance between the static support 41 and the dynamic support 42 will expand, and the reset spring 43 will be stretched to adapt to this change. At this time, the driving wheel 40 contacts the sleeve and drives. Conversely, when resetting is required, the reset spring 43 will play a role, causing the sliding plate 39 and the dynamic support 42 to return to their initial position, which is the position where the drive connecting spindle 14 rotates, facilitating the internal expansion and fixation of the sleeve.

[0107] When the sleeve needs to be driven to rotate, the motor base 24 can be controlled to rise and fall by engaging the oil cylinder 23, thereby controlling the descent of the longitudinal support plate 36, the U-shaped support plate 37 and the sliding plate 39. At this time, the sliding plate 39 slides outward, causing the driving wheel 40 to contact the sleeve and drive it to rotate.

[0108] In another embodiment of the present invention, a connecting secondary shaft 46 is rotatably mounted on the static support 41, and the connecting secondary shaft 46 is located on one side of the connecting main shaft 14, and the two are arranged vertically. A rectangular short shaft 47 is rotatably mounted on the dynamic support 42, and the rectangular short shaft 47 can slide and extend into the connecting secondary shaft 46. The length of the rectangular short shaft 47 pulled out of the connecting secondary shaft 46 is greater than or equal to the length of the sliding plate 39 pulled out of the receiving groove 38. A transmission bevel gear 48 is fixedly sleeved on the axle of the rectangular short shaft 47 and the driving wheel 40, and the two transmission bevel gears 48 are meshed with each other. A driving sprocket 2 49 is fixedly sleeved on the driving main shaft 26, and a driven sprocket 2 50 is fixedly sleeved on the connecting secondary shaft 46. The driving sprocket 2 49 and the driven sprocket 2 50 are fixedly sleeved with the same chain 2 51.

[0109] In this embodiment, we further optimize and enhance the previous design. Specifically, a connecting secondary shaft 46 is rotatably mounted on the static support 41. The connecting secondary shaft 46 is located on one side of the connecting primary shaft 14, and the two are arranged perpendicularly.

[0110] A rectangular short shaft 47 is rotatably mounted on the dynamic support 42. This short shaft 47 can slide into the connecting secondary shaft 46, ensuring reliable connection and transmission between the two. It is worth noting that the length of the short shaft 47 extended from the connecting secondary shaft 46 is greater than or equal to the length of the sliding plate 39 extended from the receiving slot 38. This means that the sliding plate 39 and the short shaft 47 have sufficient length for adaptive movement.

[0111] To rotate the drive wheel 40, bevel gears 48 are fixedly mounted on both the axle of the drive wheel 40 and the rectangular short shaft 47. These two bevel gears 48 mesh with each other, forming a gear transmission system. When the rectangular short shaft 47 rotates, the meshing of the bevel gears 48 drives the drive wheel 40 to rotate.

[0112] To transmit the rotational power of the main drive shaft 26 to the connecting countershaft 46, a second driving sprocket 49 is fixedly mounted on the main drive shaft 26, and a second driven sprocket 50 is fixedly mounted on the connecting countershaft 46. A second chain 51 is mounted on both the second driving sprocket 49 and the second driven sprocket 50, forming a chain transmission system. When the main drive shaft 26 rotates, the second chain 51 drives the second driven sprocket 50 and the connecting countershaft 46, which also rotate.

[0113] When the drive sleeve needs to rotate, since the rotation of the connecting main shaft 14 is no longer required, the output rod of the meshing cylinder 23 is retracted, thereby separating the bevel gear plate 27 from the separating bevel gear 28. By controlling the raising and lowering of the motor base 24 (usually achieved by the meshing cylinder 23), the U-shaped support plate 37 and the sliding plate 39 are lowered. At this time, the dynamic contact seat 44 interacts with the static contact seat 45, causing the sliding plate 39 to slide out of the receiving groove 38, and the rectangular short shaft 47 is simultaneously withdrawn from the connecting secondary shaft 46.

[0114] As the sliding plate 39 slides out, the driving wheel 40 contacts the sleeve and drives the sleeve to rotate. At this time, due to the transmission effect of the second chain 51, the rotational power of the driving main shaft 26 is transmitted to the connecting countershaft 46, and then through the engagement of the transmission bevel gear 48, the driving wheel 40 is driven to rotate.

[0115] When resetting or adjusting the position is required, the U-shaped support plate 37 and the sliding plate 39 are raised by controlling the rise of the motor base 24. At this time, the return spring 43 works to pull the sliding plate 39 back into the receiving groove 38, and the rectangular short shaft 47 is reinserted into the connecting secondary shaft 46, completing the disengagement action. During use, it is only necessary to control the rise and fall of the meshing cylinder 23 to achieve the switching of the equipment operating state.

[0116] In another embodiment of the present invention, a bracket seat 52 is fixedly installed on the bottom of the device frame 1.

[0117] In this embodiment, the bracket seat 52 is used to suspend the lower part, which facilitates installation while avoiding affecting the lower parts.

[0118] To sum up, compared with the relevant technologies, the present device can ensure the position accuracy of the sleeve during the welding process through the precise positioning and stable clamping of the clamp, thereby improving the welding quality; the outward support plate 5 on the chuck seat 4 of the clamp is fixed by expanding outward from the inside, which effectively avoids the problem of traditional clamps blocking the line of sight and welding route. The synchronous clamping adjustment mechanism is flexibly adjusted to drive a pair of chuck seats 4 to move together, and the fixing operation is simpler. Since the sleeve is precisely positioned and stably clamped during the welding process, the welding quality and the connection strength of automobile parts can be ensured, thereby improving the overall performance and service life of the automobile.

Claims

1. An automobile sleeve welding positioning fixture, characterized in that: include: The device frame is a "U"-shaped structure with one side open; A pair of clamp cylinders are fixedly mounted on the upper and lower sides of the device frame respectively; A pair of connecting frames, respectively fixedly mounted on the ends of the output rods of the pair of clamp cylinders; A pair of chuck seats, respectively fixedly mounted on corresponding sides of a pair of connecting frames, and both can be used to fix the sleeve to be welded; A synchronous clamping adjustment mechanism is provided on a pair of the chuck seats and is used to drive the chuck seats to position and fix the casing; The other side of the chuck seat relative to the connecting frame is the positioning side, and the positioning side surface of the chuck seat is slidably provided with a plurality of outward-expanding inner supporting pieces for cooperating and expanding outward from the inside of the sleeve for positioning; The chuck seat is provided with a plurality of sliding grooves on one side of the plurality of outward-expanded inner support pieces, and the plurality of sliding grooves correspond to the plurality of outward-expanded inner support pieces one by one. A driving screw can be rotatably installed in the plurality of sliding grooves, and a sliding block is threadedly sleeved on the plurality of driving screws. The plurality of sliding blocks are respectively fixedly connected to the plurality of outward-expanded inner support pieces. A transmission cavity is provided in the middle of the chuck seat, and a central shaft can be rotatably installed in the transmission cavity on one side of the connecting frame. A driving bevel gear is fixedly installed on one end of the central shaft located in the transmission cavity, and a driven bevel gear is fixedly installed on one end of the plurality of driving screws located in the transmission cavity, and the plurality of driven bevel gears are meshed with the driving bevel gear; The two guide wheels are fixedly mounted on the two support frames and the two guide wheels are connected along the vertical axis to form a circle around the two support frames, and the two guide wheels are connected along the vertical axis to form a circle around the two support frames. The device frame is provided with a clearance opening on one side of the support seat, the clearance opening is staggered and located above the support seat, and the device frame is provided with a power mechanism on one side of the clearance opening for driving the connecting main shaft to rotate; The power mechanism includes a meshing oil cylinder fixedly mounted on the outside of the device frame, the meshing oil cylinder is located on a side of the device frame with an avoidance opening, a motor seat is slidably mounted in the avoidance opening, the motor seat is fixedly connected to the upper end of the output rod of the meshing oil cylinder, a driving motor is fixedly mounted on the motor seat, a driving spindle is fixedly mounted on the output shaft of the driving motor, the driving spindle extends above the support seat, a conical gear disk is fixedly sleeved on the connecting spindle, the conical gear disk is located above the driving spindle, a separation bevel gear is fixedly mounted on one end of the driving spindle located on the connecting spindle, and the separation bevel gear and the conical gear disk can be separated or meshed; A cylinder seat is fixedly mounted on the side of the device frame, and the cylinder seat is fixedly connected to the engaging cylinder; A plurality of the outer expansion inner support pieces are provided with threaded columns extending from their inner sides, and an assembly hole penetrating the threaded column is provided on the outer expansion inner support piece, a ball seat and a ball are movably provided in the assembly hole, a portion of the ball extends to the outer side of the outer expansion inner support piece for contacting the inner wall of the sleeve, the ball is movably connected to the ball seat, a nut is threadedly sleeved on the threaded column, a pressure column fixedly connected to the inner side of the nut is slidably provided in the assembly hole, and a support spring is provided between the ball seat and the pressure column; The U-shaped support plate is located on the outside of the connecting spindle, and a receiving groove is provided on one side of the clamp cylinder. A sliding plate is slidably installed in the receiving groove, and the part of the sliding plate located outside the U-shaped support plate adopts a wheel axle to rotatably install a driving wheel, and the outer edge of the driving wheel extends outside the sliding plate so that it can drive the sleeve to rotate after contacting the sleeve. A static support is fixedly installed on the top of the U-shaped support plate, and the driving wheel A dynamic support is provided between the static support, the bottom of the dynamic support is fixedly connected to the top of the sliding plate, a return spring is fixedly installed between the static support and the dynamic support, the bottom of the sliding plate outside the U-shaped support plate is fixedly installed with a dynamic resistance seat, and the top of the support seat is fixedly installed with a static resistance seat, and the side where the dynamic resistance seat and the static resistance seat contact is a guide inclined surface, so that when the U-shaped support plate and the sliding plate descend, the dynamic resistance seat and the static resistance seat interact with each other to make the sliding plate slide out of the U-shaped support plate, and the static support and the dynamic support expand the distance, otherwise they are reset under the action of the return spring, and the sliding plate is flush with the outer side of the dynamic resistance seat, and the outer side of the static resistance seat shall not exceed the outer longitudinal surface of the dynamic resistance seat; A connecting countershaft is rotatably mounted on the static support, and the connecting countershaft is located on one side of the connecting main shaft, and the two are vertically arranged. A rectangular short shaft is rotatably mounted on the dynamic support, and the rectangular short shaft can slide and extend into the connecting countershaft. The length of the rectangular short shaft pulled out of the connecting countershaft is greater than or equal to the length of the sliding plate pulling out the storage groove. The rectangular short shaft and the wheel axle of the driving wheel are both fixedly sleeved with a transmission bevel gear, and the two transmission bevel gears are meshed. A driving sprocket 2 is fixedly sleeved on the driving main shaft, and a driven sprocket 2 is fixedly sleeved on the connecting countershaft. The same chain 2 is sleeved on the driving sprocket 2 and the driven sprocket 2.

2. The automobile sleeve welding positioning fixture according to claim 1, characterized in that: The output rods of the pair of clamp oil cylinders can slide through the upper and lower sides of the device frame respectively, and the pair of clamp oil cylinders are located on the same longitudinal line.

3. The automobile sleeve welding positioning fixture according to claim 1, characterized in that: The chuck seat is a perfect circular structure, and the plurality of outwardly expanded inner supporting plates are evenly distributed in a circular array.

4. The automobile sleeve welding positioning fixture according to claim 1, characterized in that: The chuck seat is a polygonal structure, and the plurality of outwardly expanding inner supporting plates are respectively arranged along polygonal directions and are distributed in a circular array as a whole.

5. The automobile sleeve welding positioning fixture according to claim 1, characterized in that: The outer side of the outward-expanding inner support piece is an arc-shaped surface, and the outer side of the upper side is an inclined surface structure.

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