Quick change mechanism for changing clamps

Abstract

The utility model provides a kind of quick-change mechanism for replacing clamp, belong to automobile accessory welding auxiliary technical field.The utility model embodiment provides the quick-change mechanism for replacing clamp, when needing to disassemble and replace clamp, only need to remove the drive mechanism to the drive of actuating column, under the elastic force of compressed first elastic member, telescopic part drives the outer peripheral surface of the connecting portion of pressure head and clamp to separate, so it can take down original clamp, then put the clamp needed to use, then drive actuating column by drive mechanism, so that actuating column can promote telescopic part and extend towards the outside of first guide sliding hole, telescopic part can drive pressure head to resist and compress tightly on the outer peripheral surface of the connecting portion of clamp at this time, so it can be firmly clamped and positioned on mounting seat under the mutual coordination of multiple pressure head, so it can save time and energy to realize the quick replacement of clamp, effectively shorten the replacement time of clamp, it is favorable to improve the welding processing efficiency of welding machine.

Description

Technical Field

[0001] This utility model belongs to the technical field of welding auxiliary equipment for automotive parts, and in particular, it relates to a quick-change mechanism for changing fixtures. Background Technology

[0002] When welding automotive parts, fixtures are typically used to hold the tools in place, preventing the workpiece from moving during welding and ensuring accurate positioning and improved efficiency. Different fixtures are generally required for welding different automotive parts. Currently, changing fixtures on welding machines is time-consuming and labor-intensive, leading to extended fixture replacement times and reduced welding efficiency. Utility Model Content

[0003] Based on the above-mentioned problems in the prior art, the purpose of this utility model embodiment is to provide a quick-change mechanism for changing fixtures, so as to solve the technical problem that when changing different fixtures on a welding machine, the disassembly and replacement of the fixtures is time-consuming and laborious, resulting in a long fixture replacement time and reducing the welding processing efficiency of the welding machine.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a quick-change mechanism for changing clamps, comprising: The mounting assembly includes a mounting base for fixed connection to the welding station of a welding machine and four positioning seats fixedly disposed on the mounting base. The four positioning seats are arranged at equal intervals along the circumference of the mounting base so that the four positioning seats surround a preset mounting position on the mounting base for accommodating the connecting portion of a fixture; and Multiple telescopic clamping and positioning mechanisms are used to clamp and position the connecting part of the clamp in the preset installation position, and each positioning seat is provided with at least one of the telescopic clamping and positioning mechanisms. The telescopic clamping and positioning mechanism includes a fixed base connected to the positioning seat, a guide seat disposed on the fixed base and having a first guide sliding hole, a telescopic member slidably disposed in the first guide sliding hole of the guide seat, a pressure head disposed at one end of the telescopic member away from the fixed base, an actuating column that pushes the telescopic member to extend outward toward the outside of the first guide sliding hole, a first elastic member capable of elastically pushing the telescopic member toward the inside of the first guide sliding hole to retract the telescopic member into the inside of the first guide sliding hole, and a driving mechanism for driving the actuating column to move axially. The fixed base is provided with a mechanism for guiding the movement of the actuating column and... A second guide slide hole communicates with the first guide slide hole. The actuating column is slidably disposed in the second guide slide hole. The first end of the actuating column abuts against the end of the telescopic member near the fixed seat. The driving mechanism can push the second end of the actuating column to drive the actuating column to move axially. A plurality of pressure heads are distributed circumferentially along the connecting part of the clamp. When each driving mechanism drives the corresponding actuating column to move axially, each telescopic member extends out of the first guide slide hole so that the pressure head abuts against and presses against the outer circumferential surface of the connecting part of the clamp to clamp and position the clamp in a preset mounting position on the mounting seat.

[0005] Furthermore, each of the driving mechanisms includes a wedge for axially moving the actuating column, a sliding block for moving the wedge, a piston structure for moving the sliding block, and a second elastic element for elastically pressing the wedge against the piston structure to reset the wedge. The fixed base has a first guide cavity inside to guide the sliding block to move in a direction perpendicular to the axial direction of the actuating column. The sliding block is slidably disposed in the first guide cavity. The second elastic element and the wedge are located in the first guide cavity. The second guide hole communicates with the first guide cavity so that the second end of the actuating column slides in contact with the inclined surface of the wedge. The fixed base also has a second guide cavity inside that communicates with the first guide cavity. The piston structure is slidably disposed in the second guide cavity. The outer peripheral surface of the piston structure is in interference contact with the inner sidewall of the second guide cavity. The fixed base has an air inlet pipe that connects the second guide cavity to the air outlet port of the air pump.

[0006] Furthermore, each of the driving mechanisms includes a rolling column disposed between the second end of the actuating column and the inclined surface of the wedge, wherein the circumferential surface of the rolling column is in rolling contact with the inclined surface of the wedge, and the circumferential surface of the rolling column is in rolling contact with the second end of the actuating column.

[0007] Furthermore, a semi-circular groove is recessed on the second end face of the actuating column to accommodate and position the rolling column, and the rolling column makes rolling contact with the inner side of the semi-circular groove.

[0008] Furthermore, the first end of the actuating column is provided with a hemispherical protrusion, and the end face of the telescopic member near the fixed seat is recessed with a hemispherical groove adapted to the hemispherical protrusion. The hemispherical protrusion is accommodated and positioned in the hemispherical groove, and the outer surface of the hemispherical protrusion slides in contact with the inner surface of the hemispherical groove.

[0009] Furthermore, the first guide slide hole is a stepped hole, and the telescopic component includes a telescopic post slidably disposed in the small hole of the first guide slide hole, an anti-detachment post slidably disposed in the large hole of the first guide slide hole, and a plurality of anti-rotation protrusions disposed on the outer peripheral surface of the telescopic post. The guide seat is provided with a guide groove for guiding the anti-rotation protrusions to move along the axial direction of the telescopic post, and each of the anti-rotation protrusions is slidably installed in the guide groove.

[0010] Furthermore, the first elastic element is a first helical spring, which is sleeved on the outside of the telescopic column. The first end of the first helical spring abuts against the anti-rotation protrusion, and the second end of the first helical spring abuts against the anti-detachment column.

[0011] Furthermore, the second elastic element is a second helical spring. The fixed base is provided with an assembly port that communicates with the first guide slide cavity. A sealing plug is detachably installed in the assembly port. One end of the sealing plug that is inserted into the first guide slide cavity is provided with a guide post. The second helical spring is sleeved on the guide post. The first end of the second helical spring abuts against the sealing plug. The second end of the second helical spring is used to abut against the wedge.

[0012] Furthermore, the wedge-shaped body is provided with an arc-shaped groove for accommodating the rolling column, the arc-shaped groove is connected to the inclined surface of the wedge-shaped body, and the rolling column is accommodated and positioned in the arc-shaped groove.

[0013] Furthermore, the pressure head is a circular pressure plate, and a rubber pad is provided on the pressing surface of the circular pressure plate.

[0014] Compared with the prior art, one or more technical solutions in the embodiments of this utility model have at least one of the following beneficial effects: The quick-change mechanism for changing the fixture in this embodiment of the utility model is provided with a mounting base that can be fixedly connected to the welding station of the welding machine. Four positioning seats are equally spaced along the circumference on the mounting base. The four positioning seats surround the mounting base to form a preset mounting position for accommodating the connecting part of the fixture. At least one telescopic clamping positioning mechanism is provided on each positioning seat, so that multiple telescopic clamping positioning mechanisms are arranged around the connecting part of the fixture. When it is necessary to disassemble and replace the fixture, simply release the drive mechanism from the actuating column. Under the elastic force of the compressed first elastic element, the telescopic member retracts into the interior of the first guide slide hole, thereby causing the pressure head to separate from the outer peripheral surface of the connection part of the fixture. In this way, the original fixture can be removed, and the fixture to be used can be placed on top. Then, the actuating column is driven by the drive mechanism, so that the actuating column can push the telescopic member to extend outward toward the outside of the first guide slide hole. At this time, the first elastic element is compressed, and the telescopic member extending outward of the first guide slide hole can drive the pressure head to resist and press against the outer peripheral surface of the connection part of the fixture. Thus, with the cooperation of multiple pressure heads, the fixture can be firmly clamped and positioned on the mounting base. This allows for quick fixture replacement in a time-saving and labor-saving manner, effectively shortening the fixture replacement time and, to a certain extent, improving the welding processing efficiency of the welding machine. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural diagram of the quick-change mechanism for changing fixtures provided by this utility model when it is in a non-working state; Figure 2 A top view of the quick-change mechanism for changing fixtures provided by this utility model when it is in a non-working state. Figure 3 A three-dimensional structural diagram of the quick-change mechanism for changing fixtures provided by this utility model in the working state; Figure 4 A top view of the quick-change mechanism for changing fixtures provided by this utility model in the working state; Figure 5 A three-dimensional structural diagram of the telescopic clamping and positioning mechanism provided by this utility model when it is in a non-working state; Figure 6 A cross-sectional view of the telescopic clamping and positioning mechanism provided by this utility model when it is in a non-working state. Figure 7A three-dimensional structural diagram of the telescopic clamping and positioning mechanism provided by this utility model in the working state; Figure 8 A cross-sectional view of the telescopic clamping and positioning mechanism provided by this utility model in its working state. Figure 9 An exploded view of the telescopic component and actuating column provided by this utility model; Figure 10 A three-dimensional structural diagram of the wedge-shaped body provided by this utility model; Figure 11 An exploded view of the quick-change mechanism for changing clamps provided by this utility model.

[0017] The following are the labeling elements in the figure: 1-Installation component; 11-Mounting base; 12-Positioning base; 13-Preset installation position; 2-Telescopic clamping and positioning mechanism; 21-Fixed seat; 211-Second guide slide hole; 212-First guide slide cavity; 213-Second guide slide cavity; 214-Assembly port; 22-Guide seat; 221-First guide slide hole; 222-Guide groove; 23-Telescopic component; 231-Telescopic column; 232-Anti-detachment column; 233-Anti-rotation protrusion; 234-Hemispherical groove; 24-Pressure head; 25-Actuating column; 251-Semi-circular groove; 252-Hemispherical protrusion; 26-Wedge-shaped body; 261-Inclined surface; 262-Arc groove; 27-Sliding block; 28-Piston structure; 281-Support component; 282-Rubber piston; 29-Second elastic component; 3-Guide post; 4-Rolling post; 5-Intake pipe; 6-Sealing plug; 7-First elastic element. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that when an element is referred to as "connected to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to or indirectly connected to the other element. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "attached" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.

[0021] Please refer to the following: Figures 1 to 11 The quick-change mechanism for changing clamps provided in this embodiment of the utility model will now be described. Please refer to the following for further details. Figure 1 , Figure 2 , Figure 3 and Figure 4The quick-change mechanism for changing fixtures provided in this embodiment of the utility model includes a mounting assembly 1 and multiple telescopic clamping and positioning mechanisms 2. The mounting assembly 1 includes a mounting base 11 for fixed connection to the welding station of a welding machine and four positioning bases 12 fixedly disposed on the mounting base 11. The four positioning bases 12 are arranged at equal intervals along the circumference of the mounting base 11, so that the four positioning bases 12 surround the mounting base 11 to form a preset mounting position 13 for accommodating the connecting part of the fixture. It should be noted that the connecting part of the fixture can be, but is not limited to, a rectangular or square connecting base. The multiple telescopic clamping and positioning mechanisms 2 are used to clamp and position the connecting part of the fixture in the preset mounting position 13. Each positioning base 12 is provided with at least one telescopic clamping and positioning mechanism 2. That is, the number of telescopic clamping and positioning mechanisms 2 provided on each positioning base 12 can be one, two, or more. The specific number of telescopic clamping and positioning mechanisms 2 provided on each positioning base 12 can be set according to actual usage requirements and is not limited here. Please refer to further details. Figure 5 , Figure 6 , Figure 7 and Figure 8The telescopic clamping and positioning mechanism 2 includes a fixed base 21 connected to the positioning base 12, a guide base 22 disposed on the fixed base 21 and having a first guide sliding hole 221, a telescopic member 23 slidably disposed in the first guide sliding hole 221 of the guide base 22, a pressure head 24 disposed at one end of the telescopic member 23 away from the fixed base 21, an actuating column 25 that pushes the telescopic member 23 toward the outside of the first guide sliding hole 221, a first elastic member 7 capable of elastically pushing the telescopic member 23 toward the inside of the first guide sliding hole 221 to retract the telescopic member 23 into the inside of the first guide sliding hole 221, and a drive mechanism for driving the actuating column 25 to move axially. It should be noted that the drive mechanism can be a linear drive actuator such as a cylinder or an electric cylinder. The fixed base 21 is provided with a second guide slide hole 211 for inducing the movement of the actuating column 25 and communicating with the first guide slide hole 221. The actuating column 25 is slidably disposed in the second guide slide hole 211. The first end of the actuating column 25 abuts against the end of the telescopic member 23 near the fixed base 21. The driving mechanism can push the second end of the actuating column 25 to drive the actuating column 25 to move axially. The central axes of the first guide slide hole 221 and the second guide slide hole 211 are collinear. Multiple pressure heads 24 are distributed circumferentially along the connection part of the clamp. When each driving mechanism drives the corresponding actuating column 25 to move axially, each telescopic member 23 extends out of the first guide slide hole 221 so that the pressure head 24 abuts against and presses against the outer circumferential surface of the connection part of the clamp. With the mutual cooperation of multiple pressure heads 24, the clamp can be clamped and positioned at the preset mounting position 13 on the mounting base 11. The quick-change mechanism for replacing fixtures provided in this embodiment of the invention uses bolts or other fasteners to fix the mounting base 11 to the welding station of the welding machine. When it is necessary to disassemble and replace the fixture, it is only necessary to release the drive mechanism from the actuating column 25. Under the elastic force of the compressed first elastic member 7, the telescopic member 23 is forced to retract from the outside of the first guide sliding hole 221 into the inside of the first guide sliding hole 221. At this time, the telescopic member 23 drives the pressure head 24 to retract to the non-pressing position, so that the outer peripheral surface of the connection between each pressure head 24 and the fixture is separated. In this way, the original fixture can be removed from the preset mounting position 13 on the mounting base 11, and then the connection of the fixture to be used can be replaced. The fixture is placed in the preset mounting position 13 on the mounting base 11. Then, the actuating column 25 is driven to move axially through the drive mechanism. The axially moving actuating column 25 can push the telescopic member 23 to extend outward toward the first guide sliding hole 221. At this time, the first elastic member 7 is compressed, and the extended telescopic member 23 drives the pressure head 24 to abut and press against the outer peripheral surface of the connecting part of the fixture. Thus, with the cooperation of multiple pressure heads 24, the fixture can be firmly clamped and positioned in the preset mounting position 13 on the mounting base 11. This allows for quick replacement of the fixture in a time-saving and labor-saving manner, effectively shortening the fixture replacement time and improving the welding processing efficiency of the welding machine to a certain extent.

[0022] The quick-change mechanism for changing fixtures provided in this embodiment of the utility model, compared with the prior art, features a mounting base 11 that can be fixedly connected to the welding station of a welding machine. Four positioning seats 12 are evenly spaced circumferentially on the mounting base 11, forming a preset mounting position 13 for accommodating the connecting part of the fixture. Each positioning seat 12 is equipped with at least one telescopic clamping positioning mechanism 2, resulting in multiple telescopic clamping positioning mechanisms 2 arranged around the connecting part of the fixture. Please refer to the reference [reference needed]. Figure 1 , Figure 5 and Figure 6 When it is necessary to disassemble and replace the clamp, simply release the drive mechanism from the actuating column 25. Under the elastic force of the compressed first elastic member 7, the telescopic member 23 retracts into the interior of the first guide sliding hole 221, thereby causing the pressure head 24 to separate from the outer peripheral surface of the connection part of the clamp. In this way, the original clamp can be removed and the clamp to be used can be placed. Please refer to the following: Figure 3 , Figure 7 and Figure 8 Then, the actuator 25 is driven by the drive mechanism, so that the actuator 25 can push the telescopic member 23 to extend outward toward the first guide slide hole 221. At this time, the first elastic member 7 is compressed, and the telescopic member 23 extending outward of the first guide slide hole 221 can drive the pressure head 24 to abut and press against the outer peripheral surface of the connecting part of the fixture. Thus, with the cooperation of multiple pressure heads 24, the fixture can be firmly clamped and positioned on the mounting base 11. In this way, the fixture can be quickly replaced in a time-saving and labor-saving manner, effectively shortening the fixture replacement time and improving the welding processing efficiency of the welding machine to a certain extent.

[0023] Please refer to the following: Figure 6 , Figure 8 and Figure 11In some embodiments, each drive mechanism includes a wedge 26 for axially moving the actuating column 25, a sliding block 27 for moving the wedge 26, a piston structure 28 for moving the sliding block 27, and a second elastic member 29 for elastically pressing the wedge 26 against the piston structure 28 to reset the wedge 26. The fixed base 21 has a first guide cavity 212 inside, guiding the sliding block 27 to move in a direction perpendicular to the axial direction of the actuating column 25. The sliding block 27 is slidably disposed in the first guide cavity 212. 9 and the wedge 26 are located in the first guide slide cavity 212. The second guide slide hole 211 communicates with the first guide slide cavity 212 so that the second end of the actuating column 25 slides in contact with the inclined surface 261 of the wedge 26. The fixed base 21 is also provided with a second guide slide cavity 213 communicating with the first guide slide cavity 212. The piston structure 28 is slidably disposed in the second guide slide cavity 213. The outer peripheral surface of the piston structure 28 is in interference contact with the inner sidewall of the second guide slide cavity 213. The fixed base 21 is provided with an air inlet pipe 5 that connects the second guide slide cavity 213 and the air outlet port of the air pump. It should be noted that the wedge 26 and the sliding block 27 are integrally formed. In this embodiment, the air pump is connected to the air supply pipe through a pressurized pipe. The air pump fills the second guide slide cavity 213 with gas. The pressurized gas in the second guide slide cavity 213 pushes the piston structure 28 to move along the second guide slide cavity 213. The piston structure 28 pushes the slider along the first guide slide cavity 212, and slides the wedge 26 to move in the first guide slide cavity 212. This causes the inclined surface 261 of the wedge 26 to push the actuating column 25 toward the telescopic member 23. Then, the actuating column 25 pushes the telescopic member 23 to extend toward the outside of the first guide slide hole 221. At this time, the first elastic member 7 and the second elastic member 29 are compressed respectively. The telescopic member 23 extending outside the first guide slide hole 221 can drive the pressure head 24 to abut and press against the outer peripheral surface of the connection part of the clamp. Thus, with the cooperation of multiple pressure heads 24, the clamp can be firmly clamped and positioned on the mounting base 11. When the gas in the second guide slide cavity 213 is depressurized, under the elastic force of the compressed first elastic member 7, the telescopic member 23 is forced to retract from the outside of the first guide slide hole 221 into the inside of the first guide slide hole 221. At this time, the telescopic member 23 drives the pressure head 24 to retract to the non-pressing position, so that the outer peripheral surface of the connection between each pressure head 24 and the clamp is separated. At the same time, the second elastic member 29 pushes the wedge 26 back to the initial position, releasing the pushing action of the actuating column 25 on the telescopic member 23. The telescopic member 23 retracts into the inside of the first guide slide hole 221 to drive the pressure head 24 to separate from the outer peripheral surface of the connection between the clamp and the clamp. In this way, the original clamp can be removed and the clamp to be used can be placed. It should be noted that the piston structure 28 includes an I-shaped support member 281 and a rubber piston 282 supported on the I-shaped support member 281, which can enhance the pressure bearing capacity of the piston structure 28 and improve the stability and reliability of the piston structure 28 pushing the sliding block 27.

[0024] Please refer to the following: Figure 6 , Figure 8 and Figure 10 In some embodiments, each driving mechanism includes a rolling pin 4 disposed between the second end of the actuating pin 25 and the inclined surface 261 of the wedge 26. The circumferential surface of the rolling pin 4 rolls in contact with the inclined surface 261 of the wedge 26, and the circumferential surface of the rolling pin 4 also rolls in contact with the second end of the actuating pin 25. In this embodiment, by providing the rolling pin 4 between the second end of the actuating pin 25 and the inclined surface 261 of the wedge 26, the friction between the actuating pin 25 and the inclined surface 261 of the wedge 26 can be reduced, which helps to improve the smoothness of the wedge 26 pushing the actuating pin 25 axially and avoids jamming between them.

[0025] Please refer to the following: Figure 6 , Figure 8 and Figure 9 In some embodiments, a semi-circular groove 251 for accommodating and positioning the rolling column 4 is recessed on the second end face of the actuating column 25. The rolling column 4 rolls in contact with the inner side of the semi-circular groove 251. The semi-circular groove 251 limits the rolling column 4 to the second end of the actuating column 25, which can prevent the rolling column 4 from slipping off the second end of the actuating column 25, thereby improving the stability and reliability of the wedge 26 in pushing the actuating column 25 to move axially.

[0026] Please refer to the following: Figure 6 , Figure 8 and Figure 9 In some embodiments, the first end of the actuating post 25 is provided with a hemispherical protrusion 252, and the end face of the telescopic member 23 near the fixed base 21 is recessed with a hemispherical groove 234 adapted to the hemispherical protrusion 252. The hemispherical protrusion 252 is accommodated and positioned within the hemispherical groove 234, and the outer surface of the hemispherical protrusion 252 slides in contact with the inner surface of the hemispherical groove 234. In this embodiment, through the sliding contact between the hemispherical protrusion 252 and the hemispherical groove 234, the first end of the actuating post 25 can be limited to the end of the telescopic member 23 near the fixed base 21, which can prevent the actuating post 25 from radially moving, thereby enhancing the stability and reliability of the actuating post 25 pushing the telescopic member 23 to move.

[0027] Please refer to the following: Figure 6 , Figure 8 , Figure 9 and Figure 11In some embodiments, the first guide slide hole 221 is a stepped hole, and the telescopic member 23 includes a telescopic post 231 slidably disposed in the small hole of the first guide slide hole 221, an anti-detachment post 232 slidably disposed in the large hole of the first guide slide hole 221, and a plurality of anti-rotation protrusions 233 disposed on the outer peripheral surface of the telescopic post 231. The guide seat 22 is provided with a guide groove 222 for guiding the anti-rotation protrusions 233 to move axially along the telescopic post 231. Each anti-rotation protrusion 233 is slidably installed in the guide groove 222, which can prevent the telescopic member 23 from rotating circumferentially and improve the stability and reliability of the sliding of the telescopic member 23.

[0028] Please refer to the following: Figure 6 , Figure 8 and Figure 11 In some embodiments, the first elastic element 7 is a first helical spring, which is sleeved on the outside of the telescopic post 231. The first end of the first helical spring abuts against the anti-rotation protrusion 233, and the second end of the first helical spring abuts against the anti-detachment post 232.

[0029] Please refer to the following: Figure 6 , Figure 8 and Figure 11 In some embodiments, the second elastic element 29 is a second helical spring. The fixed base 21 is provided with an assembly port 214 communicating with the first guide slide cavity 212. A sealing plug 6 is detachably installed in the assembly port 214 by bolts. One end of the sealing plug 6 inserted into the first guide slide cavity 212 is provided with a guide post 3. The second helical spring is sleeved on the guide post 3. The first end of the second helical spring abuts against the sealing plug 6. The second end of the second helical spring is used to abut against the wedge 26. After the external force pushing the wedge 26 is removed, the wedge 26 can be pushed back to its initial position by the compressed second helical spring.

[0030] Please refer to the following: Figure 6 , Figure 8 and Figure 10 In some embodiments, the wedge 26 is provided with an arcuate groove 262 for accommodating the rolling column 4. The arcuate groove 262 is connected to the inclined surface 261 of the wedge 26, and the rolling column 4 is accommodated and positioned in the arcuate groove 262.

[0031] Please refer to the following: Figure 5 , Figure 7 and Figure 9 In some embodiments, the pressure head 24 is a circular pressure plate, and a rubber pad is provided on the pressing surface of the circular pressure plate. On the one hand, it can reduce the impact force of the pressure head 24 on the fixture, and on the other hand, the compression generated by the compressed and deformed rubber pad can more stably clamp and position the fixture.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-change mechanism for changing clamps, characterized in that, include: The mounting assembly includes a mounting base for fixed connection to the welding station of a welding machine and four positioning bases fixedly disposed on the mounting base. The four positioning bases are arranged at equal intervals along the circumference of the mounting base so that the four positioning bases surround the mounting base to form a preset mounting position for accommodating the connecting part of the fixture. as well as Multiple telescopic clamping and positioning mechanisms are used to clamp and position the connecting part of the clamp in the preset installation position, and each positioning seat is provided with at least one of the telescopic clamping and positioning mechanisms. The telescopic clamping and positioning mechanism includes a fixed base connected to the positioning seat, a guide seat disposed on the fixed base and having a first guide sliding hole, a telescopic member slidably disposed in the first guide sliding hole of the guide seat, a pressure head disposed at one end of the telescopic member away from the fixed base, an actuating column that pushes the telescopic member to extend outward toward the outside of the first guide sliding hole, a first elastic member capable of elastically pushing the telescopic member toward the inside of the first guide sliding hole to retract the telescopic member into the inside of the first guide sliding hole, and a driving mechanism for driving the actuating column to move axially. The fixed base is provided with a mechanism for guiding the movement of the actuating column and... A second guide slide hole communicates with the first guide slide hole. The actuating column is slidably disposed in the second guide slide hole. The first end of the actuating column abuts against the end of the telescopic member near the fixed seat. The driving mechanism can push the second end of the actuating column to drive the actuating column to move axially. A plurality of pressure heads are distributed circumferentially along the connecting part of the clamp. When each driving mechanism drives the corresponding actuating column to move axially, each telescopic member extends out of the first guide slide hole so that the pressure head abuts against and presses against the outer circumferential surface of the connecting part of the clamp to clamp and position the clamp in a preset mounting position on the mounting seat.

2. The quick-change mechanism for changing fixtures as described in claim 1, characterized in that, Each of the aforementioned drive mechanisms includes a wedge for axially moving the actuating column, a sliding block for moving the wedge, a piston structure for moving the sliding block, and a second elastic element for elastically pressing the wedge against the piston structure to reset the wedge. The fixed base has a first guide cavity inside to guide the sliding block to move in a direction perpendicular to the axial direction of the actuating column. The sliding block is slidably disposed in the first guide cavity. The second elastic element and the wedge are located in the first guide cavity. The second guide hole communicates with the first guide cavity to allow the second end of the actuating column to slide in contact with the inclined surface of the wedge. The fixed base also has a second guide cavity inside that communicates with the first guide cavity. The piston structure is slidably disposed in the second guide cavity. The outer peripheral surface of the piston structure is in interference contact with the inner wall of the second guide cavity. The fixed base has an air inlet pipe connecting the second guide cavity to the air outlet port of the air pump.

3. The quick-change mechanism for changing fixtures as described in claim 2, characterized in that, Each of the driving mechanisms includes a rolling column disposed between the second end of the actuating column and the inclined surface of the wedge, wherein the circumferential surface of the rolling column is in rolling contact with the inclined surface of the wedge, and the circumferential surface of the rolling column is in rolling contact with the second end of the actuating column.

4. The quick-change mechanism for changing fixtures as described in claim 3, characterized in that, The second end face of the actuating column is recessed with a semi-circular groove for accommodating and positioning the rolling column, and the rolling column makes rolling contact with the inner side of the semi-circular groove.

5. The quick-change mechanism for changing fixtures as described in claim 2, characterized in that, The first end of the actuating column is provided with a hemispherical protrusion, and the end face of the telescopic member near the fixed seat is recessed with a hemispherical groove that is adapted to the hemispherical protrusion. The hemispherical protrusion is accommodated and positioned in the hemispherical groove, and the outer surface of the hemispherical protrusion slides in contact with the inner surface of the hemispherical groove.

6. The quick-change mechanism for changing fixtures as described in claim 1, characterized in that, The first guide slide hole is a stepped hole. The telescopic component includes a telescopic post slidably disposed in the small hole of the first guide slide hole, an anti-detachment post slidably disposed in the large hole of the first guide slide hole, and a plurality of anti-rotation protrusions disposed on the outer circumferential surface of the telescopic post. The guide seat is provided with a guide groove for guiding the anti-rotation protrusions to move along the axial direction of the telescopic post, and each of the anti-rotation protrusions is slidably installed in the guide groove.

7. The quick-change mechanism for changing fixtures as described in claim 6, characterized in that, The first elastic element is a first helical spring, which is sleeved on the outside of the telescopic column. The first end of the first helical spring abuts against the anti-rotation protrusion, and the second end of the first helical spring abuts against the anti-detachment column.

8. The quick-change mechanism for changing fixtures as described in claim 2, characterized in that, The second elastic element is a second helical spring. The fixed base is provided with an assembly port that communicates with the first guide slide cavity. A sealing plug is detachably installed in the assembly port. One end of the sealing plug that is inserted into the first guide slide cavity is provided with a guide post. The second helical spring is sleeved on the guide post. The first end of the second helical spring abuts against the sealing plug. The second end of the second helical spring is used to abut against the wedge.

9. The quick-change mechanism for changing fixtures as described in claim 3, characterized in that, The wedge-shaped body is provided with an arc-shaped groove for accommodating the rolling column. The arc-shaped groove is connected to the inclined surface of the wedge-shaped body, and the rolling column is accommodated and positioned in the arc-shaped groove.

10. The quick-change mechanism for changing a clamp as described in any one of claims 1 to 9, characterized in that, The pressure head is a circular pressure plate, and a rubber pad is provided on the pressing surface of the circular pressure plate.

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