Rotary clamp type contact tip dismounting mechanism with damping control

Abstract

The present application relates to the technical field of conductive nozzle replacement, and particularly relates to a rotating clamping type conductive nozzle dismounting mechanism with damping control, which comprises a bearing sleeve, a guide sleeve ball bearing, an outer cylinder, a lower inner cylinder section, a clamping assembly and the like; the bearing sleeve is fixed on an automatic conductive nozzle replacement device, the inner side of the bearing sleeve is installed with the outer cylinder through the guide sleeve ball bearing, a gear is installed at the lower part of the outer cylinder, a hollow cavity is formed through the center of the outer cylinder, the diameter of the top of the outer cylinder is larger than the diameter of the middle bottom of the outer cylinder; an installation groove is formed at the top of the outer cylinder. By adjusting the friction fit between the ball head plunger in the damping assembly and the circular groove of the lower inner cylinder section, the relative rotational speed difference between the upper inner cylinder section, the lower inner cylinder section and the outer cylinder can be accurately controlled, and a stable power basis is provided for the gradual clamping and loosening of the chuck.

Description

Technical Field

[0001] This invention relates to the field of conductive nozzle replacement technology, and more particularly to a rotary clamping conductive nozzle disassembly mechanism with damping control. Background Technology

[0002] In robotic arm-controlled welding operations, the contact tip, as a core and easily damaged component of the welding torch, directly affects welding stability and weld quality. Its lifespan is typically only about four hours, requiring frequent replacement. Currently, contact tip replacement in the industry largely relies on manual operation, presenting numerous technical bottlenecks and production challenges. Because the contact tip retains extremely high temperatures after welding, to prevent burns to operators, the machine must be stopped and allowed to cool naturally before disassembly. This process not only significantly extends equipment downtime and reduces overall welding efficiency but also requires dedicated personnel, increasing labor costs. Furthermore, manual replacement suffers from inconsistent results, easily damaging the welding torch interface due to uneven force during disassembly and assembly, further affecting subsequent welding accuracy.

[0003] With the rapid development of automated welding technology, manual replacement of contact tips is no longer adequate for the demands of efficient and continuous automated production lines. Developing automated contact tip replacement equipment and supporting disassembly mechanisms has become a key direction for industry upgrades. Existing automated replacement devices often lack stable clamping and buffering control structures, leading to problems such as insecure clamping causing contact tips to fall off, unstable rotational torque causing component wear, and difficulty in precisely controlling the disassembly rhythm, hindering smooth contact tip installation and automatic return collection. Furthermore, some devices lack contact tip detachment detection functions, failing to provide timely feedback on the replacement status, easily causing missed or incorrect replacements, affecting the continuity of the production line. Therefore, it is necessary to design a stable, damped, rotary clamping contact tip disassembly mechanism to solve these problems. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a rotary clamping conductive nozzle disassembly mechanism with damping control.

[0005] A damped rotary clamping conductive tip disassembly mechanism includes a bearing sleeve, a guide sleeve ball bearing, an outer cylinder, a lower section of the inner cylinder, a clamping assembly, a damping assembly, and a gear. The bearing sleeve is fixed to an automatic conductive tip changing device. The inner side of the bearing sleeve is installed to the outer cylinder via the guide sleeve ball bearing. The gear is installed at the lower part of the outer cylinder. A hollow cavity is opened through the center of the outer cylinder. The diameter of the top of the outer cylinder is larger than the diameter of its bottom. An installation groove is opened at the top of the outer cylinder. The top of the lower section of the inner cylinder is connected to the upper section of the inner cylinder. The upper section of the inner cylinder is placed in the installation groove at the top of the outer cylinder. The lower section of the inner cylinder passes through the hollow cavity of the outer cylinder. A conductive tip sliding cavity is opened at the center of the lower section and the upper section of the inner cylinder. A clamping assembly for clamping the conductive tip is provided in the installation groove at the top of the outer cylinder. A damping assembly that can provide resistance when the lower section of the inner cylinder rotates is provided at the bottom of the outer cylinder.

[0006] In a preferred embodiment of the present invention, the clamping assembly includes a fixing ring, a cover plate, a chuck, and a round shaft pin. The fixing ring is disposed in the mounting groove at the top of the outer cylinder, and the cover plate is disposed on the top of the fixing ring. The fixing ring has symmetrically opened guide grooves. The upper section of the inner cylinder has symmetrically opened rectangular holes. The chuck is slidably disposed in the rectangular hole of the upper section of the inner cylinder. The main body of the chuck is a rectangular block, and the side of the two chucks that is far apart from each other is an extended arc block. The rectangular block of the chuck is slidably engaged with the rectangular hole of the upper section of the inner cylinder. The arc block of the chuck is located in the guide groove of the fixing ring. The top of the arc block of the chuck is disposed in a round shaft pin. The bottom of the cover plate has symmetrically distributed arc-shaped guide grooves, which guide the round shaft pin.

[0007] In a preferred embodiment of the present invention, symmetrical limiting grooves are opened on the fixing ring, the limiting grooves are offset from the guide grooves, a support plate is provided on the upper part of the upper section of the inner cylinder, and there are two protruding limiting blocks on the outer circular surface of the support plate, the protruding limiting blocks cooperate with the limiting grooves of the fixing ring.

[0008] In a preferred embodiment of the present invention, the cover plate and the retaining ring are fixedly connected by fastening screws.

[0009] In a preferred embodiment of the present invention, the damping assembly includes a damping mounting base, a ball-head plunger, and a set screw. The damping mounting base is fixedly connected to the bottom of the outer cylinder. The side wall of the damping mounting base has threaded holes spaced apart circumferentially. The ball-head plunger is disposed in the threaded holes of the damping mounting base. The bottom of the damping mounting base has a screw hole that communicates with the threaded holes. The set screw passes through the screw hole to fasten and limit the ball-head plunger.

[0010] In a preferred embodiment of the present invention, an elastic element is also included, with an elastic element disposed between the upper part of the outer cylinder and the bearing sleeve.

[0011] In a preferred embodiment of the present invention, a proximity switch mounting plate and an annular proximity switch are further included. The proximity switch mounting plate is disposed at the bottom of the damping mounting base, and the annular proximity switch is mounted at the bottom of the proximity switch mounting plate.

[0012] In a preferred embodiment of the present invention, circular grooves are evenly distributed on the lower part of the outer side wall of the lower section of the inner cylinder, and the ball-head plunger in the damping assembly contacts the circular grooves of the lower section of the inner cylinder.

[0013] Compared with existing technologies, this invention has the following advantages: By adjusting the frictional engagement between the ball-head plunger and the lower section of the inner cylinder's circular groove in the damping assembly, the relative rotational speed difference between the upper and lower sections of the inner cylinder and the outer cylinder can be precisely controlled, providing a stable power foundation for the progressive clamping and releasing of the chuck. Simultaneously, the chuck achieves precise positioning of centripetal and centrifugal motion through the dual guidance of the arc-shaped guide groove and the guide slot. Combined with the limiting block of the support plate and the limiting groove of the fixing ring, the clamping stroke can be strictly controlled, and it can also bear the force on the upper and lower sections of the inner cylinder. This ensures that the chuck accurately engages with the conductive nozzle groove during each disassembly, facilitating precise disassembly of the conductive nozzle. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the exploded structure of the present invention;

[0016] Figure 3 This is an exploded view of the clamping assembly of the present invention;

[0017] Figure 4 This is a schematic diagram illustrating the fit between the round shaft pin and the arc-shaped guide groove of the present invention.

[0018] Figure 5 This is a schematic diagram of the installation structure of the support plate of the present invention;

[0019] Figure 6 This is a schematic diagram of the installation structure of the ball-head plunger of the present invention;

[0020] Figure 7 This is an exploded structural diagram of the damping component of the present invention;

[0021] Figure 8 This is a three-dimensional structural diagram of the conductive tip of the present invention.

[0022] The components are: 1_bearing sleeve, 2_guide sleeve ball bearing, 3_outer cylinder, 4_lower section of inner cylinder, 5_clamping assembly, 51_mounting groove, 52_upper section of inner cylinder, 53_fixing ring, 54_cover plate, 55_clamp, 56_round shaft pin, 57_arc guide groove, 58_guide groove, 59_limiting groove, 510_support plate, 511_fastening screw, 6_damping assembly, 61_damping mounting base, 62_threaded hole, 63_ball head plunger, 64_screw hole, 65_set screw, 7_gear, 8_elastic element, 9_proximity switch mounting plate, 10_ring proximity switch, 11_conductive nozzle. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example: A rotary clamping conductive tip disassembly mechanism with damping control, such as... Figures 1-2 As shown, the device includes a bearing sleeve 1, a guide sleeve ball bearing 2, an outer cylinder 3, a lower section of the inner cylinder 4, a clamping assembly 5, a damping assembly 6, a gear 7, and an elastic element 8. The bearing sleeve 1 is fixed to the automatic contact tip changing device. The inner side of the bearing sleeve 1 is installed to the outer cylinder 3 via the guide sleeve ball bearing 2. The gear 7 is installed at the lower part of the outer cylinder 3. When the gear 7 rotates, it rotates the outer cylinder 3. The outer cylinder 3 has a through-hole hollow cavity in its center. The diameter of the top of the outer cylinder 3 is larger than the diameter of its bottom. The top of the outer cylinder 3 has a mounting groove 51. The top of the lower section of the inner cylinder 4 is connected to the upper section of the inner cylinder 52. The upper section of the inner cylinder 52 is placed in the mounting groove 51 at the top of the outer cylinder 3. Section 4 penetrates the hollow cavity of the outer cylinder 3. The center of the lower section 4 and the upper section 52 of the inner cylinder has a conductive nozzle sliding cavity. The size of the conductive nozzle sliding cavity is just enough for the conductive nozzle to pass through. The mounting groove 51 at the top of the outer cylinder 3 is equipped with a clamping component 5 for clamping the conductive nozzle 11. The bottom of the outer cylinder 3 is equipped with a damping component 6 that can provide resistance when the lower section 4 of the inner cylinder rotates. An elastic element 8 is provided between the upper part of the outer cylinder 3 and the bearing sleeve 1. The elastic element 8 is a compression spring. When the conductive nozzle of the welding torch is replaced, the component installed on the inner side wall of the guide sleeve ball bearing 2 can move vertically. After the component is removed, the conductive nozzle 11 springs back to its original position.

[0025] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the clamping assembly 5 includes a retaining ring 53, a cover plate 54, a chuck 55, and a round shaft pin 56. The retaining ring 53 is installed in the mounting groove 51 at the top of the outer cylinder 3. The cover plate 54 is installed on the top of the retaining ring 53. The retaining ring 53 has symmetrically opened guide grooves 58. The upper section 52 of the inner cylinder has symmetrically opened rectangular holes. The chuck 55 is slidably installed in the rectangular hole of the upper section 52 of the inner cylinder. The main body of the chuck 55 is a rectangular block, and the side of the two chucks 55 that is far apart from each other is an extended arc block. The rectangular block of the chuck 55 slidably engages with the rectangular hole of the upper section 52 of the inner cylinder. The arc block of the chuck 55 is located on the guide of the retaining ring 53. Inside the groove 58, a round shaft pin 56 is provided on the top of the arc block of the chuck 55. There are symmetrically distributed arc-shaped guide grooves 57 at the bottom of the cover plate 54. The arc-shaped guide grooves 57 guide the round shaft pin 56. The fixing ring 53 has symmetrically opened limit grooves 59. The limit grooves 59 and the guide grooves 58 are staggered. A support plate 510 is provided on the upper part of the upper section 52 of the inner cylinder. The support plate 510 is welded to the upper section 52 of the inner cylinder. There are two protruding limit blocks on the outer circular surface of the support plate 510. The protruding limit blocks cooperate with the limit grooves 59 of the fixing ring 53. The cover plate 54 and the fixing ring 53 are fixedly connected by fastening screws 511.

[0026] like Figure 1 , Figure 6 and Figure 7 As shown, the damping assembly 6 includes a damping mounting base 61, a ball-head plunger 63, and a set screw 65. The damping mounting base 61 is fixedly connected to the bottom of the outer cylinder 3. The side wall of the damping mounting base 61 has threaded holes 62 spaced circumferentially. The ball-head plunger 63 is installed in the threaded holes 62 of the damping mounting base 61. The damping of the outer cylinder 3 is adjusted by adjusting the depth of the thread. The bottom of the damping mounting base 61 has a screw hole 64 that communicates with the threaded holes 62. The set screw 65 passes through the screw hole 64 to fasten and limit the ball-head plunger 63. The lower part of the outer side wall of the lower section of the inner cylinder 4 has evenly distributed circular grooves. The ball-head plunger 63 in the damping assembly 6 contacts the circular grooves of the lower section of the inner cylinder 4.

[0027] like Figure 1 and Figure 2 As shown, it also includes a proximity switch mounting plate 9 and a ring proximity switch 10. The damping mounting base 61 is provided with a proximity switch mounting plate 9 at the bottom, and the ring proximity switch 10 is installed at the bottom of the proximity switch mounting plate 9. The ring proximity switch 10 can detect whether the disassembled conductive nozzle 11 has fallen off, and send a signal to the controller of the automatic conductive nozzle replacement device, and then record the data.

[0028] This mechanism is fixed to the automatic contact tip changing device via bearing sleeve 1. The contact tip to be replaced is inserted into the contact tip sliding cavity of the upper section 52 of the inner cylinder. The automatic contact tip changing device is driven by a motor. The motor meshes with the gear 7 on the lower side of the outer cylinder 3 via gear 7. The outer cylinder 3 is driven by gear 7 to start rotating clockwise. Due to the contact friction between the ball plunger 63 in the damping assembly 6 and the circular groove of the lower section 4 of the inner cylinder, there is a speed difference between the rotation of the lower section 4 of the inner cylinder and the upper section 52 of the inner cylinder and the outer cylinder 3. The cover plate 54 with the circular shaft pin 56 moves along the arc-shaped guide groove 57. At the same time, the chuck 55 is also squeezed by the inner wall of the guide groove 58 of the fixing ring 53 when rotating. As a result, both chucks 55 move towards the axis. The two protruding limiting blocks of the support plate 510 reach the limiting position of the limiting groove 59 of the fixing ring 53 after the outer cylinder 3 rotates a certain angle. The chuck 55 clamps the groove at the bottom of the contact tip (such as...). Figure 8 As shown), the outer cylinder 3, the upper section 52 of the inner cylinder, and the lower section 4 of the inner cylinder rotate simultaneously. After rotating together for a specified time, the conductive tip on the welding gun can be unscrewed and detached. At this time, the drive motor of the automatic conductive tip replacement device rotates in the opposite direction, and the gear 7 drives the outer cylinder 3 to rotate in the opposite direction. Due to the resistance applied by the damping component 6 to the upper section 52 of the inner cylinder and the lower section 4 of the inner cylinder, the upper section 52 of the inner cylinder and the outer cylinder 3 rotate relative to each other. The round shaft pin 56 connected to the chuck 55 is squeezed by the inner wall of the arc-shaped guide groove 57 of the cover plate 54. The chuck 55 connected to the round shaft pin 56 moves away from the axis, loosening the disassembled conductive tip, which falls into the cavity from the conductive tip sliding into the cavity of the upper section 52 of the inner cylinder and the lower section 4 of the inner cylinder.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rotary clamping conductive nozzle disassembly mechanism with damping control, characterized in that, include: Bearing sleeve (1), the bearing sleeve (1) is fixed on the automatic contact tip changing device; The outer cylinder (3) is installed on the inner side of the bearing sleeve (1) through the guide sleeve ball bearing (2). The outer cylinder (3) has a through hollow cavity in the center. The top diameter of the outer cylinder (3) is larger than the bottom diameter of itself. The top of the outer cylinder (3) has an installation groove (51). The gear (7) is installed on the lower part of the outer cylinder (3). The lower section (4) of the inner cylinder is connected to the upper section (52) of the inner cylinder at its top. The upper section (52) of the inner cylinder is placed in the mounting groove (51) at the top of the outer cylinder (3). The lower section (4) of the inner cylinder penetrates the hollow cavity of the outer cylinder (3). The lower section (4) of the inner cylinder and the upper section (52) of the inner cylinder have a conductive nozzle sliding cavity at their center. The clamping assembly (5) is provided in the mounting groove (51) at the top of the outer cylinder (3) for clamping the conductive nozzle (11). The clamping assembly (5) includes: The fixing ring (53) is provided in the mounting groove (51) at the top of the outer cylinder (3). The fixing ring (53) has symmetrical guide grooves (58). The top of the fixing ring (53) is provided with a cover plate (54). The chuck (55) has rectangular holes symmetrically opened on the upper section (52) of the inner cylinder. The chuck (55) is slidably disposed in the rectangular holes of the upper section (52) of the inner cylinder. The main body of the chuck (55) is a rectangular block. The side of the two chucks (55) that is far apart from each other is an extended arc block. The rectangular block of the chuck (55) is slidably engaged with the rectangular holes of the upper section (52) of the inner cylinder. The arc block of the chuck (55) is located in the guide groove (58) of the fixing ring (53). The round shaft pin (56) is provided on the top of the arc block of the chuck (55); the bottom of the cover plate (54) has symmetrically distributed arc-shaped guide grooves (57), which guide the round shaft pin (56). The fixed ring (53) has symmetrically opened limit grooves (59), and the limit grooves (59) are offset from the guide grooves (58); the upper part of the inner cylinder upper section (52) is provided with a support plate (510), and the outer circular surface of the support plate (510) has two protruding limit blocks, which cooperate with the limit grooves (59) of the fixed ring (53); the damping component (6) is provided at the bottom of the outer cylinder (3) to provide resistance when the lower section (4) of the inner cylinder rotates.

2. The rotary clamping conductive nozzle disassembly mechanism with damping control as described in claim 1, characterized in that: The cover plate (54) and the fixing ring (53) are fixedly connected by fastening screws (511).

3. The rotary clamping conductive nozzle disassembly mechanism with damping control as described in claim 2, characterized in that: The damping component (6) includes: A damping mounting base (61) is fixedly connected to the bottom of the outer cylinder (3); the side wall of the damping mounting base (61) is provided with threaded holes (62) spaced circumferentially, and a ball plunger (63) is provided in the threaded holes (62) of the damping mounting base (61); the bottom of the damping mounting base (61) is provided with a screw hole (64) that communicates with the threaded holes (62), and a set screw (65) passes through the screw hole (64) to fasten and limit the ball plunger (63).

4. The rotary clamping conductive nozzle disassembly mechanism with damping control as described in claim 3, characterized in that: it also... include: The elastic element (8) is provided between the upper part of the outer cylinder (3) and the bearing sleeve (1).

5. The rotary clamping conductive nozzle disassembly mechanism with damping control as described in claim 4, characterized in that: it also... include: The proximity switch mounting plate (9) is provided at the bottom of the damping mounting base (61); a ring proximity switch (10) is installed at the bottom of the proximity switch mounting plate (9).

6. The rotary clamping conductive nozzle disassembly mechanism with damping control as described in claim 5, characterized in that: The lower outer wall of the lower section of the inner cylinder (4) is uniformly distributed with circular grooves, and the ball-head plunger (63) in the damping assembly (6) is in contact with the circular grooves of the lower section of the inner cylinder (4).

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