CN218284104U - Quick-release device for welding chuck and welding equipment - Google Patents

Abstract

The utility model provides a weld quick detach device and welding equipment for chuck. Weld quick detach device for chuck includes: an expansion structure; the mounting structure is used for mounting the welding chuck; wherein, the tight structure of expanding has the tight end of expanding that can follow its radial expansion, and mounting structure's partial structure is located the periphery of the tight end of expanding, and the tight end of expanding has the locking position with the mounting structure butt and the unblock position of declutching with mounting structure. The technical scheme of the utility model the quick detach device for welding chuck can improve the change efficiency and the welding efficiency of welding pin.

Description

Quick-release device for welding chuck and welding equipment

Technical Field

The utility model relates to a resistance welds technical field, particularly, relates to a weld quick detach device and welding equipment for chuck.

Background

The resistance welding needle of general welding equipment passes through the welding chuck to be fixed on the welding machine, and fixedly connected between welding chuck and the welding machine. And resistance welding needle need change, polish after long-time the use, among the prior art, because the welding chuck is difficult to pull down from the welding machine, consequently, need dismantle change and tear open the line with every welding needle on the welding chuck when changing the welding needle, frequent dismouting, timing and polish to the welding needle can lead to equipment to need to shut down the wait for a long time, can seriously cause man-hour extravagant like this to reduce the change efficiency and the welding efficiency of welding needle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a weld quick detach device and welding equipment for chuck, the aforesaid welds quick detach device for chuck and can improve the change efficiency and the welding efficiency of welding pin.

In order to achieve the above object, the utility model provides a weld quick detach device for chuck, include: an expansion structure; the mounting structure is used for mounting the welding chuck; wherein, the tight structure of expanding has the tight end of expanding that can follow its radial expansion, and mounting structure's partial structure is located the periphery of the tight end of expanding, and the tight end of expanding has the locking position with the mounting structure butt and the unblock position of declutching with mounting structure.

Furthermore, the quick-release device for the welding chuck further comprises a guide rod, wherein the guide rod comprises a first shaft section and a conical section connected with the first shaft section; the tight structure of expanding is including the removal cover that is located the periphery of guide bar and the rolling member of wearing to establish in the radial through-hole of removing the cover, removes the movable setting of cover along the axis direction of guide bar, when the tight end that expands is in locking position, the rolling member by the primary shaft section along radial ejecting and with the mounting structure butt, when the tight end that expands is in unlocking position, the rolling member and the laminating of toper section, the one end that the removal cover was equipped with the rolling member forms the tight end that expands.

Furthermore, the guide rod further comprises a second shaft section connected with the first shaft section, the outer diameter of the second shaft section is larger than that of the first shaft section, and a first step surface is arranged at the joint between the outer wall surface of the first shaft section and the outer wall surface of the second shaft section; the movable sleeve comprises a first cylinder section and a second cylinder section which are connected, the inner diameter of the second cylinder section is larger than that of the first cylinder section, and a second step surface which can be abutted against the first step surface is arranged at the joint between the inner wall surface of the first cylinder section and the inner wall surface of the second cylinder section.

Furthermore, the mounting structure is provided with a taper hole, and the inner diameter of the taper hole is gradually reduced along the axis of the taper hole and towards the direction close to the expansion end.

Further, weld for chuck quick detach device still include: the cylinder body is provided with an accommodating cavity and an air inlet communicated with the accommodating cavity, and the expansion structure is positioned in the accommodating cavity; and the piston is connected with one end of the expansion structure and movably arranged in the accommodating cavity so as to drive the expansion end to move.

Further, the air inlet is located one side that deviates from the tight structure that expands of piston, welds for the chuck quick detach device still including the elastic component that deviates from air inlet one side that is located the piston, the one end and the piston butt of elastic component, the other end and the cylinder body butt of elastic component.

Furthermore, the cylinder body comprises a main body and a mounting seat which are connected, the piston is positioned in the main body, the mounting seat is provided with a conical hole, and the inner diameter of the conical hole is gradually increased along the direction from the main body to the mounting seat; the mounting structure comprises a connecting piece and a mounting piece connected with the connecting piece, the connecting piece is provided with a conical surface matched with the conical hole, and the mounting piece is used for being connected with the welding chuck.

Further, the installed part is connected and is the first plate section and the second plate section that the contained angle set up including being connected, and first plate section is connected with the connecting piece, is equipped with the mounting hole that is used for the installation to weld the chuck on the second plate section.

Further, the installed part still includes the reinforcing plate, and the one end and the first plate section of reinforcing plate are connected, and the other end and the second plate section of reinforcing plate are connected.

Furthermore, the quick-release device for the welding chuck further comprises a positioning part and a positioning hole matched with the positioning part, one of the cylinder body and the mounting structure is provided with the positioning hole, and the other of the cylinder body and the mounting structure is provided with the positioning part.

Furthermore, the quick-release device for the welding chuck further comprises a signal output module arranged on the cylinder body and a signal receiving module arranged on the mounting structure, and the signal output module is electrically connected with the signal receiving module.

Furthermore, the quick release device for the welding chuck further comprises an electric output module arranged on the cylinder body and an electric receiving module arranged on the mounting structure, and the electric output module is electrically connected with the electric receiving module.

According to the utility model discloses an on the other hand, this embodiment provides a welding equipment, including welding machine, foretell quick detach device and welding chuck, quick detach device is used for connecting the welding machine and welds the chuck.

Use the technical scheme of the utility model, be used for the installation to weld the mounting structure of chuck and set up on the welding machine and have the tight structure that expands of the bloated end that can radially stretch out and withdraw through setting up, can realize mounting structure and the quick assembly disassembly between the tight structure that expands like this, thereby realize welding quick assembly disassembly between chuck and the welding machine, thus, when the welding machine is in operating condition, can dismantle and change many welding pins on chuck and the welding chuck fast, thereby the man-hour of dismouting has been saved, and then the change efficiency and the welding efficiency of welding pin have been improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view showing one direction of a quick release device for a welding chuck according to an embodiment of the present invention;

FIG. 2 shows an exploded cross-sectional view of the quick release apparatus for a welding chuck of FIG. 1;

FIG. 3 is a schematic connection diagram illustrating a cylinder, a guide rod and an expansion structure of the quick release device for a welding chuck in FIG. 2;

FIG. 4 shows an enlarged view of a portion of the quick release mechanism for the weld cartridge of FIG. 3;

FIG. 5 is a schematic view of a guide bar of the quick release device for a welding chuck of FIG. 1;

FIG. 6 is a structural view showing another direction of the quick release device for a welding chuck in FIG. 1; and

fig. 7 shows an assembled cross-sectional view of the quick release device for a welding jaw of fig. 1.

Wherein the figures include the following reference numerals:

10. an expansion structure; 11. moving the sleeve; 111. a first barrel section; 112. a second barrel section; 12. a rolling member; 20. a mounting structure; 21. a taper hole; 22. a connecting member; 23. a mounting member; 231. a first plate section; 232. a second plate section; 233. mounting holes; 234. a reinforcing plate; 30. a guide bar; 31. a first shaft section; 32. a second shaft section; 33. a tapered section; 40. a cylinder body; 41. a main body; 42. a mounting seat; 43. an air inlet; 51. a piston; 52. an elastic member; 53. a positioning member; 54. positioning holes; 55. a signal output module; 56. a signal receiving module; 57. an electrical output module; 58. an electrical receiving module.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that the utility model discloses a weld quick detach device for chuck mainly used automatic resistance welding machine, the automatic field of changing of robot clamp tool of changing of chuck.

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a quick release device for a welding chuck, including an expanding structure 10 and a mounting structure 20. Wherein the expansion structure 10 is configured to be capable of being disposed on a welding machine; the mounting structure 20 is used for mounting a welding chuck; wherein, the structure 10 that expands has the end that expands that can stretch out and draw back along its radial, and mounting structure 20's part structure is located the periphery of the end that expands, and the end that expands has the locking position of abutting with mounting structure 20 and the unblock position of breaking away from mounting structure 20.

Among the above-mentioned technical scheme, through setting up mounting structure 20 that is used for the installation to weld the chuck and setting up on the welding machine and have the bloated tight structure 10 of the tight end that expands that can radially stretch out and withdraw, can realize like this quick assembly disassembly between mounting structure 20 and the bloated tight structure 10, thereby realize welding quick assembly disassembly between chuck and the welding machine, like this, when the welding machine is in operating condition, can dismantle and change welding chuck and many welding needles that weld on the chuck fast, thereby the man-hour of dismouting has been saved, and then the change efficiency and the welding efficiency of welding needle have been improved.

Further, the purpose of quickly replacing the welding pins is achieved.

Specifically, in the embodiment of the utility model, for among the prior art at the welding machine during operation, dismantle many welding pins one by one, this implementation can be with being used for the mounting structure 20 of fixed welding chuck from the tight structure 10 of bloating on the welding machine dismantlement fast, thereby make many welding pins on the welding chuck also dismantled, and like this, can change the welding pin and polish the welding pin one by one again under the line, change the mode of welding pin and polishing the welding pin on the replacement line, and like this, on the one hand, the dismouting time has been saved, in order to improve welding pin change efficiency and welding efficiency, on the other hand, welding quality also can be improved behind the quick replacement welding pin.

Further, for the mode of on-line direct change welding pin and the welding pin of polishing, this embodiment is through with the soldered connection from welding chuck quick assembly disassembly back of pulling down on the mechanism, polishes under the line to the welding pin, can reduce the operation risk.

As shown in fig. 2 to fig. 5, in the embodiment of the present invention, the quick release device for a welding chuck further includes a guide rod 30, and the guide rod 30 includes a first shaft section 31 and a tapered section 33 connected to the first shaft section 31; the expansion structure 10 comprises a movable sleeve 11 positioned on the periphery of the guide rod 30 and a rolling element 12 arranged in a radial through hole of the movable sleeve 11 in a penetrating mode, the movable sleeve 11 is movably arranged relative to the guide rod 30 along the axial direction of the guide rod 30, when the expansion end is located at the locking position, the rolling element 12 is ejected out in the radial direction by the first shaft section 31 and abutted against the mounting structure 20, when the expansion end is located at the unlocking position, the rolling element 12 is attached to the conical section 33, and the end, provided with the rolling element 12, of the movable sleeve 11 forms the expansion end.

Through the setting, can utilize along the rolling member 12 of the radial movement of removing cover 11 to realize expanding tight structure 10 and mounting structure 20's butt and throw off to the realization locks mounting structure 20 in the periphery of expanding tight structure 10 and mounting structure 20 and the purpose that the tight structure 10 of expanding was thrown off, like this, can realize mounting structure 20 and expand the quick assembly disassembly between the tight structure 10, thereby improve and weld needle change efficiency and welding efficiency.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the rolling member 12 is located at the outer periphery of the first shaft section 31 and the rolling member 12 is jacked up by the first shaft section 31, the rolling member 12 can abut against a part of the mounting structure 20 located at the outer periphery thereof, so that the mounting structure 20 can be clamped on the rolling member 12, that is, the expansion end is located at the locking position; when unlocking is required, the moving sleeve 11 in fig. 2 is moved rightwards along the axial direction of the guide rod 30 until the moving sleeve 11 carries the rolling members 12 to the position of the tapered section 33, so that the rolling members 12 can move relative to the moving sleeve 11 along the radial direction of the moving sleeve 11, namely the rolling members 12 are difficult to clamp the mounting structure 20, and at the moment, a technician pulls the mounting structure 20 out along the axial direction of the guide rod 30, so that the mounting structure 20 can be detached.

Preferably, in the embodiment of the present invention, the expansion structure 10 includes a plurality of rolling members 12, and the plurality of rolling members 12 are disposed at intervals around the axial direction of the moving sleeve 11.

Preferably, in the embodiment of the present invention, the rolling members 12 are balls, and the inner diameter of the radial through hole on the moving sleeve 11 is smaller than the maximum outer diameter of the rolling members 12, so that the rolling members 12 can be prevented from falling off from the moving sleeve 11.

Of course, in one embodiment, the rolling members 12 may not be provided, and one end of the moving sleeve 11 may be provided as an elastic sleeve capable of being opened and retracted, so that the elastic sleeve can be opened or closed by the movement of the tapered section of the guide rod to achieve quick detachment.

As shown in fig. 3, in the embodiment of the present invention, the guide bar 30 further includes a second shaft section 32 connected to the first shaft section 31, an outer diameter of the second shaft section 32 is larger than an outer diameter of the first shaft section 31, and a joint between an outer wall surface of the first shaft section 31 and an outer wall surface of the second shaft section has a first step surface; the movable sleeve 11 comprises a first cylinder section 111 and a second cylinder section 112 which are connected, the inner diameter of the second cylinder section 112 is larger than that of the first cylinder section 111, and a second step surface which can be abutted against the first step surface is arranged at the joint between the inner wall surface of the first cylinder section 111 and the inner wall surface of the second cylinder section 112.

Among the above-mentioned technical scheme, when changing and welding the chuck, need install the periphery at the bloated tight end of unblock position with new welding chuck, then make movable sleeve 11 move to the left side in the figure 3, like this, can be with mounting structure 20 and welding chuck locking after the change at the bloated tight end, and can restrict the extreme position that movable sleeve 11 moved to the left side through setting up first step face and second step face, avoid moving sleeve 11 to move the position to the air inlet to avoid influencing the motion of movable sleeve 11.

It should be noted that, in the embodiment of the present invention, since the outer diameter of the second shaft section 32 is greater than the outer diameter of the first shaft section 31, a step surface is formed at the joint of the outer wall surfaces of the first shaft section 31 and the second shaft section 32; similarly, the inner diameter of the second cylinder section 112 is larger than the inner diameter of the first cylinder section 111, and a step surface is formed at the connection position of the inner wall of the first cylinder section 111 and the inner wall of the second cylinder section 112.

As shown in fig. 2 and fig. 7, in the embodiment of the present invention, the mounting structure 20 is provided with a tapered hole 21, and the inner diameter of the tapered hole 21 gradually decreases along the axis of the tapered hole 21 and toward the direction close to the expansion end.

With the above arrangement, when the expansion end is in the locking position, the inclined inner wall of the tapered hole 21 can provide an acting force for preventing the mounting structure 20 from being separated from the expansion end, so that the mounting structure 20 is more stably locked on the periphery of the expansion end; in the process that the expansion end is switched from the locking position to the unlocking position, namely in the process that the movable sleeve 11 drives the rolling part 12 to move, sliding friction between the rolling part 12 and the mounting structure 20 can be effectively avoided, so that the probability of abrasion between the rolling part 12 and the mounting structure 20 can be reduced.

Specifically, the utility model discloses an in the embodiment, be equipped with on the mounting structure 20 with the hole of dodging of taper hole 21 intercommunication, and dodge the internal diameter in hole and be greater than or equal to the biggest internal diameter of taper hole 21 to dodge partial guide bar 30 and partial tight structure 10 of expanding, thereby avoid the restriction to remove the removal of cover 11.

As shown in fig. 3, in the embodiment of the present invention, the quick release device for a welding chuck further includes a cylinder 40 and a piston 51. The cylinder body 40 is arranged on the welding machine, an accommodating cavity and an air inlet 43 communicated with the accommodating cavity are formed in the cylinder body 40, and the expansion structure 10 is located in the accommodating cavity; the piston 51 is connected to one end of the expansion structure 10, and the piston 51 is movably disposed in the accommodating cavity to drive the expansion end to move.

Through the above arrangement, the air inlet 43 is connected with an air source providing air pressure, the air source conveys compressed air to the air inlet 43, the compressed air can push the piston 51 and the expansion structure 10 to move along the axial direction of the piston 51, so as to realize the movement of the expansion end (the movement of the rolling member 12), and thus the rolling member 12 can move to the position of the conical section 33, so that the rolling member 12 can move along the radial direction of the moving sleeve 11 relative to the moving sleeve 11, i.e. the rolling member 12 is difficult to clamp the mounting structure 20, so as to switch the expansion end from the locking position to the unlocking position, at this time, a technician pulls out the mounting structure 20 along the axial direction of the guide rod 30, and can detach the mounting structure 20, so as to realize quick detachment.

Specifically, the utility model discloses an in the embodiment, piston 51's week is equipped with the annular mounting groove on week, and the quick detach device for the welding chuck is still including the sealing washer that is located the annular mounting groove to realize the sealed between the internal face in piston 51 and the holding chamber.

Preferably, in the embodiment of the present invention, the piston 51 is located at the periphery of the second shaft section 32 and connected with the second cylinder section 112 of the moving sleeve 11. Of course, in an embodiment, the second shaft section 32 may not be provided, and the piston is a solid structure, so that the piston 51 is connected to the moving sleeve 11, as long as the piston 51 can drive the moving sleeve 11 to move.

As shown in fig. 3, in the embodiment of the present invention, the air inlet 43 is located on one side of the piston 51 that is away from the expansion structure 10, the quick release device for a welding head further includes an elastic member 52 located on one side of the piston 51 that is away from the air inlet 43, one end of the elastic member 52 abuts against the piston 51, and the other end of the elastic member 52 abuts against the cylinder 40.

With the above arrangement, when the locking position is switched to the unlocking position, the air source is turned on, and the compressed air applies an acting force to the piston 51, so that the piston 51 moves and compresses the elastic member 52; when the air supply is closed, the acting force exerted on the expansion structure 10 by the compressed air disappears, so that the compressed elastic member 52 can recover the deformation, thereby pushing the piston 51 to move in the direction away from the mounting structure 20, so that the reset of the expansion structure 10 can be realized, and the expansion end can be switched to the locking position from the unlocking position.

Certainly, in alternative embodiment, elastic component 52 also can not be set up, with air inlet 43 and vacuum pump connection, just can realize the reset of bloated tight structure 10, like this, when needs are closed, only need to close the air supply, open the vacuum pump can, the vacuum pump can be taken away piston 51's the one side air that deviates from the tight end that expands, make piston 51's the one side that deviates from the tight end that expands be the negative pressure, thereby can make the piston remove, in order to realize the reset of bloated tight structure 10, be about to the tight end that expands and switch to locking position by the unblock position.

As shown in fig. 2, in the embodiment of the present invention, the cylinder body 40 includes a main body 41 and a mounting seat 42 connected to each other, the piston 51 is located in the main body 41, the mounting seat 42 is provided with a tapered hole, and the inner diameter of the tapered hole gradually increases along the axial direction of the tapered hole from the main body 41 to the mounting seat 42; the mounting structure 20 comprises a connecting piece 22 and a mounting piece 23 connected to the connecting piece 22, the connecting piece 22 having a conical surface cooperating with the conical hole, the mounting piece 23 being intended to be connected to a welding collet.

Through the above setting, the conical surface and the bell mouth cooperation of connecting piece 22 can make connecting piece 22 wear to locate the inside of mount pad 42 like this to it is more stable to make being connected between mount pad 42 and the connecting piece 22, and further, the bell mouth can provide the guide effect for connecting piece 22 that has the conical surface, thereby makes things convenient for assembly mounting structure 20 more.

As shown in fig. 1, in the embodiment of the present invention, the mounting member 23 includes a first plate 231 and a second plate 232 connected to each other and disposed at an included angle, the first plate 231 is connected to the connecting member 22, and the second plate 232 is provided with a mounting hole 233 for mounting a welding head. Like this, can be connected the welding chuck with bloated tight structure 10 through second plate segment 232, first plate segment 231 and connecting piece 22, and first plate segment 231 and second plate segment 232 are the contained angle setting and can make the welding needle towards the below setting in fig. 1 to be convenient for weld.

Preferably, in the embodiment of the present invention, the welding clamp is connected to the mounting hole 233 of the second plate 232 by a bolt.

Specifically, in the embodiment of the present invention, the included angle between the first plate segment 231 and the second plate segment 232 is 90 ° ± 0.1 °, preferably 90 °, so that the welding precision can be improved.

As shown in fig. 1, in the embodiment of the present invention, the installation component 23 includes a first plate 231 and a second plate 232 connected to each other and disposed at an included angle, the installation component 23 further includes a reinforcing plate 234, one end of the reinforcing plate 234 is connected to the first plate 231, and the other end of the reinforcing plate 234 is connected to the second plate 232. This can increase the coupling strength between the first plate segment 231 and the second plate segment 232, thereby improving the stability of the welding collet installation.

Preferably, in the embodiment of the present invention, the number of the reinforcing plates 234 is two, and the reinforcing plates are respectively located at opposite sides of the mounting hole 233.

Specifically, as shown in fig. 1, in the embodiment of the present invention, the reinforcing plate 234 is in the shape of a right trapezoid, and two right-angled sides of the right trapezoid are respectively connected to the first plate section 231 and the second plate section 232. Alternatively, the reinforcing plate 234 may be shaped as a right triangle.

Preferably, as shown in fig. 1, in the embodiment of the present invention, the reinforcing plate 234 is provided with lightening holes to lighten the weight of the reinforcing plate 234.

As shown in fig. 1 and fig. 6, in the embodiment of the present invention, the quick detaching device for welding chuck further includes a positioning member 53 and a positioning hole 54 matched with the positioning member 53, the cylinder body 40 is provided with the positioning hole 54, and the mounting structure 20 is provided with the positioning member 53. Thus, when the mounting structure 20 and the welding head are replaced, the positioning hole 54 and the positioning piece 53 can be used to align the position between the tapered hole 21 and the expansion end, thereby improving the mounting efficiency.

Of course, in one embodiment, the positioning member 53 may be provided on the cylinder 40 and the positioning hole 54 may be provided on the mounting structure 20.

As shown in fig. 1, in an embodiment of the present invention, the quick release device for a welding chuck further includes a signal output module 55 disposed on the cylinder 40 and a signal receiving module 56 disposed on the mounting structure 20, and the signal output module 55 and the signal receiving module 56 are electrically connected.

Through the setting, the welding machine can be through signal output module 55 and signal receiving module 56 with signal transmission to welding pin to realize transmission welding parameter's purpose, further, for the signal line that needs the dismouting welding pin when changing the welding pin among the prior art, this embodiment only needs to aim at signal output module 55 and signal receiving module 56 with the connection and just can realize the signal connection of welding pin and welding machine, thereby improves and changes efficiency.

As shown in fig. 1, in the embodiment of the present invention, the quick release device for a welding chuck further includes an electrical output module 57 disposed on the cylinder 40 and an electrical receiving module 58 disposed on the mounting structure 20, and the electrical output module 57 and the electrical receiving module 58 are electrically connected.

Through the arrangement, the welding machine can supply power to the welding needle through the electric output module 57 and the electric receiving module 58, so that welding is achieved, and further, compared with the prior art that wires of the welding needle need to be disassembled and assembled when the welding needle is replaced, the electric welding machine can achieve electric connection between the welding needle and the welding machine only by aligning and connecting the electric output module 57 and the electric receiving module 58, so that replacement efficiency is improved. It should be noted that specific installation positions of the signal output module 55 and the signal receiving module 56, and the electrical output module 57 and the electrical receiving module 58 may be interchanged according to actual requirements, and only the aligned connection of the signal output module 55 and the signal receiving module 56, and the aligned connection of the electrical output module 57 and the electrical receiving module 58 need to be satisfied.

An embodiment of the utility model provides a welding equipment, including welding machine, foretell quick detach device and welding chuck, quick detach device is used for connecting the welding machine and welds the chuck. The welding equipment has all the advantages of the quick release device, and the description is omitted here.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: through setting up the mounting structure who is used for the installation to weld the chuck and setting up on the welding machine and have the tight structure that expands of the tight end that expands that can radially stretch out and withdraw, can realize like this mounting structure and the quick assembly disassembly between the tight structure that expands to realize welding between chuck and the welding machine quick assembly disassembly, like this, when the welding machine is in operating condition, can dismantle and change welding chuck and many welding pins on the welding chuck fast, thereby the man-hour of dismouting has been saved, and then improved welding pin change efficiency and welding efficiency.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. The utility model provides a weld quick detach device for chuck which characterized in that includes:

an expansion structure (10);

a mounting structure (20) for mounting a welding chuck;

the expansion structure (10) is provided with an expansion end capable of extending and contracting along the radial direction of the expansion structure, part of the structure of the mounting structure (20) is located on the periphery of the expansion end, and the expansion end is provided with a locking position abutted against the mounting structure (20) and an unlocking position disengaged from the mounting structure (20).

2. The quick release device for a welding chuck according to claim 1, characterized in that the quick release device for a welding chuck further comprises a guide rod (30), the guide rod (30) comprises a first shaft section (31) and a tapered section (33) connected with the first shaft section (31);

the expansion structure (10) is including being located the removal cover (11) of the periphery of guide bar (30) with wear to establish rolling member (12) in the radial through-hole of removal cover (11), remove cover (11) and follow the axis direction movably setting of guide bar (30), work as when the expansion end is in locking position, rolling member (12) quilt first shaft section (31) along radial ejecting and with mounting structure (20) butt, work as when the expansion end is in the unblock position, rolling member (12) with toper section (33) laminating, it is equipped with to remove cover (11) the one end of rolling member (12) forms the expansion end.

3. The quick release device for the welding chuck as claimed in claim 2, characterized in that the guide rod (30) further comprises a second shaft section (32) connected to the first shaft section (31), the outer diameter of the second shaft section (32) is larger than that of the first shaft section (31), and a joint between the outer wall surface of the first shaft section (31) and the outer wall surface of the second shaft section (32) has a first step surface;

the movable sleeve (11) comprises a first cylinder section (111) and a second cylinder section (112) which are connected, the inner diameter of the second cylinder section (112) is larger than that of the first cylinder section (111), and a second step surface capable of being abutted against the first step surface is arranged at the connection position between the inner wall surface of the first cylinder section (111) and the inner wall surface of the second cylinder section (112).

4. The quick release device for the welding chuck as claimed in any one of claims 1 to 3, characterized in that the mounting structure (20) is provided with a tapered hole (21), and the inner diameter of the tapered hole (21) is gradually reduced along the axis of the tapered hole (21) and towards the direction close to the expansion end.

5. The quick release device for a welding collet according to any one of claims 1 to 3, characterized in that the quick release device for a welding collet further comprises:

the cylinder body (40) is provided with an accommodating cavity and an air inlet (43) communicated with the accommodating cavity, and the expansion structure (10) is positioned in the accommodating cavity;

and the piston (51) is connected with one end of the expansion structure (10), and the piston (51) is movably arranged in the accommodating cavity so as to drive the expansion end to move.

6. The quick release device for a welding chuck according to claim 5, characterized in that the air inlet (43) is located on a side of the piston (51) facing away from the expansion structure (10), and further comprising an elastic member (52) located on a side of the piston (51) facing away from the air inlet (43), wherein one end of the elastic member (52) abuts against the piston (51), and the other end of the elastic member (52) abuts against the cylinder (40).

7. The quick release device for a welding chuck according to claim 5, characterized in that the cylinder (40) comprises a main body (41) and a mounting seat (42) which are connected, the piston (51) is located in the main body (41), the mounting seat (42) is provided with a tapered hole, and the inner diameter of the tapered hole is gradually increased from the main body (41) to the mounting seat (42);

the mounting structure (20) comprises a connecting piece (22) and a mounting piece (23) connected with the connecting piece (22), the connecting piece (22) is provided with a conical surface matched with the conical hole, and the mounting piece (23) is used for being connected with the welding chuck.

8. The quick release device for the welding chuck as claimed in claim 7, wherein the mounting member (23) comprises a first plate section (231) and a second plate section (232) connected and arranged at an included angle, the first plate section (231) is connected with the connecting member (22), and the second plate section (232) is provided with a mounting hole (233) for mounting the welding chuck.

9. The quick release device for a welding chuck according to claim 8, characterized in that the mounting part (23) further comprises a reinforcing plate (234), one end of the reinforcing plate (234) is connected with the first plate section (231), and the other end of the reinforcing plate (234) is connected with the second plate section (232).

10. The quick release device for welding chuck according to claim 5, further comprising a positioning member (53) and a positioning hole (54) engaged with the positioning member (53), wherein one of the cylinder body (40) and the mounting structure (20) is provided with the positioning hole (54), and the other of the cylinder body (40) and the mounting structure (20) is provided with the positioning member (53).

11. The quick release device for a welding chuck according to claim 5, characterized in that the quick release device for a welding chuck further comprises a signal output module (55) disposed on the cylinder (40) and a signal receiving module (56) disposed on the mounting structure (20), wherein the signal output module (55) and the signal receiving module (56) are electrically connected.

12. The quick release device for a welding chuck according to claim 5, characterized in that it further comprises an electrical output module (57) provided on the cylinder (40) and an electrical receiving module (58) provided on the mounting structure (20), the electrical output module (57) and the electrical receiving module (58) being electrically connected.

13. Welding apparatus comprising a welding machine, a quick release device as claimed in any one of claims 1 to 12 for connecting the welding machine and the welding collet, and a welding collet.

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