CN113547475B

CN113547475B - Screw up rifle and criticize first change device and screw up module

Info

Publication number: CN113547475B
Application number: CN202010327818.XA
Authority: CN
Inventors: 张德峰; 齐芊枫
Original assignee: Shanghai Micro Electronics Equipment Co Ltd
Current assignee: Shanghai Micro Electronics Equipment Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2023-02-10
Anticipated expiration: 2040-04-23
Also published as: CN113547475A

Abstract

The invention provides a screwing gun bit replacing device which comprises a screwing execution unit, a screwing driving unit and a screwing detachable unit, wherein the screwing driving unit is fixed on a screwing module; the tightening execution unit is detachably connected with the tightening driving unit through a tightening detachable unit and is used for being matched with the piece to be tightened; when the tightening execution unit is connected with the tightening driving unit, the tightening driving unit is used for driving the tightening execution unit to disassemble and assemble the piece to be tightened. The invention also provides a screwing module comprising the screwing gun bit replacing device. The screwing gun bit replacing device provided by the invention fully utilizes the structure of the screwing detachable unit to realize the quick positioning and clamping of the screwing execution unit, and has the advantages of simple and compact structure, high reliability and convenience for quick replacement. For the parts to be screwed of different specifications, only the execution unit to be screwed needs to be replaced, so that the cost is saved while the working efficiency is improved.

Description

Screw up rifle and criticize first change device and screw up module

Technical Field

The invention relates to the field of machining and manufacturing equipment, in particular to a screwing gun bit replacing device and a screwing module.

Background

In the prior art of machining equipment manufacturing, locking members are often required to secure and lock some structures or components to the workpiece being machined, and in the prior art, the locking members are typically picked, placed, locked and/or removed using a tightening module. Among them, the screw is used as the most commonly used locking member, and the screwing module is usually adopted to perform the assembling and disassembling operation. As shown in fig. 1, which is a schematic structural diagram of one of the tightening modules for locking screws, the tightening module includes a mounting base 110, a slide rail 120, a propulsion cylinder 130, a connecting block 140, a tightening gun 150, a pickup tube 160, a tightening bit 170, and a compression spring 180. The propulsion cylinder 130 and the tightening gun 150 are fixed to the body of the tightening module by the connection block 140, respectively, and the sliding guide 120 guides the propulsion cylinder 130 when the propulsion cylinder 130 moves; the pick-up tube 160 is fixed on the body of the tightening module through the mounting base 110, the propulsion cylinder 130 is used for controlling the up-and-down motion state of the tightening gun 150, and the tightening gun 150 is used for controlling the tightening bit 170 to detach the screw 200 to be tightened. Fig. 2 is a schematic view of the pickup tube 160 of fig. 1 in a state of picking up screws. Preferably, the bottom of the pick-up tube 160 has a "stepped bore". When the screw 190 to be screwed is picked up, the vacuum is opened, the cavity of the pickup tube 160 is in a vacuum state, and the screw head of the screw 200 to be screwed is adsorbed and embedded into the step hole of the pickup tube 160, so that the pickup function is realized. When the screw 190 to be screwed is placed, the screwing screwdriver 170 is driven by the screwing gun 150 to rotate and move downwards to contact the screw 190 to be screwed, the screw 200 to be screwed is separated from the pickup tube 160, and vacuum is closed, so that the screw 190 to be screwed is placed and screwed. It can be seen that the tightening module needs to establish a vacuum chamber between the pickup tube 160 and the screw 190 to be tightened for suction, and the tightening is performed by the tightening bit 170. However, because the different sizes of screws have different "head" sizes, different pickups 160 and tightening bits 170 are required to tighten different sizes of screws.

In order to solve the problem of screwing screws of different specifications, in the prior art, two common solutions are provided, wherein one solution is to adapt to screwing screws of different specifications by manually replacing a pickup tube and a screwdriver head of a screwing module. In addition, different tightening modules are connected with the universal tightening module replacing device, and the universal tightening module replacing device is used for realizing automatic module replacing.

The publication date is 11/26/2014, and the Chinese patent with the application publication number of CN104162874A discloses a vacuum suction head and a vacuum adsorption device, which comprise a main body, a batch head and a linear positioning unit, wherein the position of a screw is prevented from shifting during adsorption, but the vacuum suction head cannot adapt to the disassembly of parts to be adsorbed with different specifications.

The date of authorizing the bulletin is 2014 01 month 15 days, and the china utility model patent of authorizing the bulletin number for CN203390208U discloses a head is criticized to well hollow lock screw, including criticizing first body, criticizing first body and having seted up airflow channel along the axial, airflow channel and external vacuum source switch-on utilize the vacuum adsorption power of the airflow channel of criticizing first inside to realize treating the absorption of screwing up the piece, can't satisfy the dismantlement of treating the absorption piece of different specifications equally.

Therefore, it is necessary to provide a replacing device for the bit of the tightening gun to solve the problem of tightening screws with different specifications.

It is noted that the information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to solve the technical problem that a screwing module in the prior art cannot adapt to workpieces to be screwed with various specifications, one purpose of the screwing module is to provide a screwing gun batch head replacing device, and the other purpose of the screwing module is to provide a screwing module.

In order to achieve the purpose, the invention is realized by the following technical scheme: a screwing gun bit replacing device comprises a screwing execution unit, a screwing driving unit and a screwing detachable unit, wherein the screwing driving unit is fixed on a screwing module;

the tightening execution unit is detachably connected with the tightening driving unit through the tightening detachable unit and is used for being matched with a piece to be tightened;

when the tightening execution unit is connected with the tightening driving unit, the tightening driving unit is used for driving the tightening execution unit to disassemble and assemble the piece to be tightened.

Optionally, the tightening driving unit includes a first picking cylinder and a first batch head, the first batch head is located in a cavity of the first picking cylinder, one end of the first picking cylinder is fixed on the tightening module, a tail of the first batch head is fixed on the tightening module, and a head of the first batch head is used for connecting with the tightening execution unit;

the tightening execution unit comprises a second picking cylinder and a second batch head, the second picking cylinder is a through cylinder, the two ends of the second picking cylinder are respectively a connecting end of the second picking cylinder and a picking port of the second picking cylinder, the connecting end of the second picking cylinder is used for being connected with the other end of the first picking cylinder, the second batch head is located in a cavity of the second picking cylinder, and the head of the second batch head is matched with the piece to be tightened;

the screwing detachable unit comprises a first connecting assembly and a second connecting assembly, the first connecting assembly is fixedly arranged on the outer wall of the first picking cylinder, the second connecting assembly is fixedly arranged on the outer wall of the second picking cylinder, and the first connecting assembly and the second connecting assembly are detachably connected;

the tightening execution unit is connected with the tightening driving unit and comprises a first picking cylinder communicated with a second picking cylinder.

Optionally, the first connecting assembly is arranged on an outer wall of the first picking cylinder close to the head of the first batch head;

the second connecting assembly is arranged on the outer wall of the second picking cylinder close to the connecting end of the second picking cylinder.

Optionally, the first connection assembly comprises a first adsorption end cap fixedly arranged at the periphery of the first picking drum;

the second connecting assembly comprises a first positioning base, the first positioning base comprises a first positioning base fixing part and a first positioning base extending part, the second connecting assembly is fixedly arranged on the outer wall of the second picking cylinder, and the first positioning base fixing part is fixedly arranged on the periphery of the second picking cylinder;

the outer wall of the first positioning base extension part is matched with the inner wall of the first adsorption end cover;

the first positioning base extension part is provided with a base through hole, and the inner wall of the base through hole is matched with the outer wall of the first picking cylinder;

when the first positioning base extension part is embedded into the first adsorption end cover, the first positioning base extension part, the first adsorption end cover and the first picking cylinder jointly form a closed chamber;

the first connection assembly further comprises at least one end cover vent pipe arranged on the cover part of the first adsorption end cover;

the end cover vent pipe is communicated with an air source to change the air pressure state in the closed cavity so as to control the connection or the separation of the tightening execution unit and the tightening driving unit;

when the tightening driving unit and the tightening performing unit are connected, the first pickup cylinder, the base through hole, and the second pickup cylinder form a communicating chamber.

Optionally, the number of the end cover vent pipes is two, and the two end cover vent pipes are uniformly distributed on the cover part of the first adsorption end cover.

Optionally, the first connection assembly further comprises a first connection cylinder fixedly arranged on the periphery of the first picking cylinder and located between the first picking cylinder and the first adsorption end cap fixedly arranged on the periphery of the first connection cylinder;

the outer wall of the first connecting cylinder is matched with the inner wall of the through hole of the base;

the first positioning base extension part, the first adsorption end cover and the first picking cylinder form a closed cavity together, the outer wall of the first connecting cylinder is embedded into the base through hole, and the first positioning base extension part, the first adsorption end cover and the first connecting cylinder form a closed cavity together;

the first pick-up cylinder, the base through hole and the second pick-up cylinder forming a communicating cavity comprises the first pick-up cylinder, the first connecting cylinder, the base through hole and the second pick-up cylinder forming a communicating cavity.

Optionally, the first connection assembly further includes a lock nut, and the first adsorption end cap and the first connection barrel are fixedly connected through the lock nut.

Optionally, the base through hole includes a first connection hole and a second connection hole, an inner diameter of the first connection hole is larger than an inner diameter of the second connection hole so that the base through hole is stepped, and the second connection hole is close to the first positioning base fixing portion;

the outer wall of the first connecting cylinder is matched with the inner walls of the first connecting hole and the second connecting hole, and the first connecting cylinder can be detachably connected with the base through hole to form a pin hole.

Optionally, the first connection hole comprises a square hole and the second connection hole comprises a circular hole.

Optionally, the base through hole further includes a third connecting hole, the third connecting hole is located between the second connecting hole and the first positioning base fixing portion, and an inner diameter of the third connecting hole is smaller than an inner diameter of the second connecting hole.

Optionally, the first positioning base has an outer shape including a stepped cylinder, and the outer diameter of the first positioning base extension portion is greater than the outer diameter of the first positioning base fixing portion.

Optionally, the first positioning base extension part comprises a base extension connecting part and a base extension positioning part, the first positioning base extension part has a shape of a stepped cylinder, and the outer wall of the base extension part connecting part is matched with the inner wall of the first adsorption end cap; the outer diameter of the base extension positioning part is larger than the inner diameter of the first adsorption end cover.

Optionally, the second connecting assembly further comprises at least one fastener, and the first positioning base fixing part and the second picking cylinder are fixedly connected through the fastener.

Optionally, the tail of the second batch head is matched with the inner wall of the second picking cylinder, and the second batch head is connected with the second picking cylinder in a sliding manner through the tail of the second batch head.

Optionally, the second batch head further comprises at least one batch head vent hole, and the batch head vent hole penetrates through the tail of the second batch head along the extending direction of the second batch head.

Optionally, the second batch head comprises four batch head vent holes, and the batch head vent holes are uniformly distributed at the tail of the second batch head.

Optionally, the first picking cartridge being in communication with the second picking cartridge comprises the first picking cartridge, the batch head vent and the second picking cartridge being in communication.

Optionally, when the tightening execution unit is connected to the tightening driving unit, the tightening execution unit further includes that the head of the first batch head is clamped to the tail of the second batch head.

Optionally, the afterbody of the second batch of head is provided with the recess, the recess with the head of first batch of head matches, the head of first batch of head with the afterbody joint of second batch of head includes, the head embedding of first batch of head the recess, first batch of head with the second batch of head passes through the recess joint.

Optionally, the groove is located in the center of the tail of the second batch head.

Optionally, the tightening execution unit further comprises an elastic member located within the cavity of the second pick cylinder;

the compression direction of the elastic piece is consistent with the extension direction of the second batch head.

Optionally, the second picking drum comprises a first sub picking drum and a second sub picking drum, the first sub picking drum is close to the connecting end of the second picking drum, and the inner diameter of the first sub picking drum is larger than that of the second sub picking drum;

the elastic piece is arranged in the cavity of the first sub picking cylinder and is positioned between the tail part of the second batch head and the second sub picking cylinder;

the second sub picking cylinder is close to the picking port of the second picking cylinder, and the inner diameter of the second sub picking cylinder is smaller than the outer diameter of the tail part of the second batch head.

Optionally, the resilient member comprises a spring, and the body of the second bit extends through an inner cavity of the spring.

Optionally, the second picking cylinder further comprises a third sub picking cylinder, the third sub picking cylinder is close to the picking end of the second picking cylinder and connected with the second sub picking cylinder, the inner diameter of the third sub picking cylinder is larger than that of the second sub picking cylinder, and the inner wall of the third sub picking cylinder is matched with the member to be screwed.

Optionally, a magnet is fixedly arranged at the pick-up port of the second pick-up cylinder.

Optionally, the tool further comprises a solenoid valve, when the tightening execution unit is connected with the tightening driving unit, the tightening driving unit is configured to drive the tightening execution unit to disassemble and assemble the to-be-tightened piece, the solenoid valve is configured to control a pneumatic state in a cavity of the first picking cylinder and the second picking cylinder to pick or place the to-be-tightened piece, and when the second picking cylinder picks or places the to-be-tightened piece, the head of the second batch head is located in the cavity of the second picking cylinder.

Optionally, when the tightening execution unit is connected with the tightening driving unit, the tightening driving unit is configured to drive the tightening execution unit to disassemble and assemble the piece to be tightened, and the tightening driving unit is configured to disassemble and assemble the piece to be tightened,

the first batch head is used for moving and rotating the second batch head to screw or disassemble the piece to be screwed, and when the second batch head screws or disassembles the piece to be screwed, the head of the second batch head is positioned outside the cavity of the second picking cylinder.

Optionally, the first connecting assembly includes an electromagnet, the first connecting assembly is fixedly disposed on an outer wall of the first picking cylinder, and the electromagnet is disposed at one end of the first picking cylinder, where the end of the first picking cylinder is used for connecting the second picking cylinder;

the second connecting assembly is made of a ferrous or magnetic material;

when the electromagnet is in a power-on state, the tightening execution unit is connected with the tightening driving unit, and when the electromagnet is in a power-off state, the tightening execution unit is separated from the tightening driving unit.

Optionally, the first connection assembly comprises a first spring-plunger connector and at least one first spring-plunger hole, the first spring-plunger hole being provided on the first spring-plunger connector;

the first connecting assembly is fixedly arranged on the outer wall of the first picking barrel, and the first spring plunger connecting piece is fixedly arranged on the periphery of the first picking barrel;

the second connecting assembly comprises a second spring plunger connecting piece and a spring plunger matched with the first spring plunger hole, the second spring plunger connecting piece comprises a second spring plunger fixing part and a second spring plunger extending part, the second connecting assembly is fixedly arranged on the outer wall of the second picking barrel, and the second spring plunger fixing part is fixedly arranged on the periphery of the second picking barrel;

the second spring plunger extension part is of a cylindrical structure, and the inner wall of the second spring plunger extension part is matched with the outer wall of the first spring plunger connecting piece;

the spring plunger is configured to change a locking state of the first spring plunger coupling and the second spring plunger coupling through the first spring plunger hole to control connection or disconnection of the tightening execution unit and the tightening driving unit.

Optionally, the first spring plunger bore comprises a blind bore or a through bore.

Optionally, the first connection assembly comprises a chuck driving part having chuck jaws, and the second connection assembly comprises a chuck body;

the first connecting component is fixedly arranged on the outer wall of the first picking cylinder, and the chuck driving part is fixedly arranged on the periphery of the first picking cylinder;

the second connecting assembly is fixedly arranged on the outer wall of the second picking cylinder, and the chuck body is fixedly arranged on the outer wall of the second picking cylinder;

the chuck driving part is matched with the chuck body;

the chuck driving part is used for driving the chuck jaws and the chuck body to be in a locking state so as to control the connection or the separation of the screwing execution unit and the screwing driving unit.

Optionally, the chuck driving part includes a chuck driving part body having a cavity, a driving chamber located in the cavity of the chuck driving part body, a chuck vent pipe communicated with the driving chamber, a chuck stop movably disposed inside the driving chamber, a jaw guide, a jaw reset member, and the chuck jaws, and jaw positioning holes penetrating through the driving chamber;

the chuck vent pipe is connected with an external air source, the chuck jaws are positioned between the jaw positioning holes and the jaw guide piece, and the jaw guide piece comprises a wedge piece which can be pushed by the jaw stop block and the jaw resetting piece to move along the extension direction of the driving cavity; the chuck jaws are matched with the jaw positioning holes;

the second connecting piece further comprises a clamping jaw locking groove, the chuck body comprises a chuck body fixing part and a chuck body extending part, the chuck body fixing part is fixedly connected with the outer wall of the second picking cylinder, and the chuck body extending part comprises a cylindrical structure;

the clamping jaw locking groove is fixedly arranged on the outer wall of the chuck body extending part, the inner wall of the chuck body extending part is matched with the outer wall of the first picking cylinder, and the outer wall of the chuck body extending part is matched with the inner wall of the chuck driving part body;

the chuck jaw, the jaw positioning hole and the jaw locking groove are matched.

In order to achieve another object of the invention, the invention also provides a tightening module, which comprises the tightening gun batch head replacing device.

Compared with the prior art, the screwing gun batch head replacing device provided by the invention has the following beneficial effects:

the invention provides a screwing gun bit replacing device which comprises a screwing driving unit and a screwing executing unit, wherein the screwing driving unit and a first connecting cylinder are connected with a screwing module, and the screwing executing unit is placed on a material rack to be fetched. The screwing gun bit replacing device provided by the invention fully utilizes the structure of the screwing detachable unit to realize the quick positioning and clamping of the screwing execution unit, and has the advantages of simple and compact structure, high reliability and convenience for quick replacement. For the parts to be screwed of different specifications, only the execution unit to be screwed needs to be replaced, so that the cost is saved while the working efficiency is improved.

Furthermore, the end cover vent pipe provided by the invention can be connected with an external air source, so that the vacuum adsorption force in the closed cavity formed by the first adsorption end cover and the first positioning base is controlled, and the connection and the separation of the screwing execution unit and the screwing driving unit are realized. Two parts are connected and are fixed a position through vacuum adsorption's mode about, to this quick replacement that realizes screwing up the execution unit, and the external air supply can multiplex the vacuum adsorption of screwing up the module among the prior art and treat the air supply of screwing up the piece, and current structure need not any change, simple structure. In addition, the whole process does not need to manually position and fix the tightening execution unit and the tightening driving unit, and the working efficiency is improved.

Still further, according to the replacing device for the batch head of the tightening gun provided by the invention, the first connecting cylinder is fixed with the first picking cylinder, and the locking nut fixes the first adsorption end cover with the first connecting cylinder, so that the first adsorption end cover is well bound with the first picking cylinder. The first picking cylinder provides guidance for the rotation motion and the up-and-down motion of the first batch head and the second batch head, and the picking and placing of the piece to be screwed are realized through the vacuum adsorption force of the first picking cylinder, the second picking cylinder and a closed cavity formed by the piece to be screwed.

Still further, in a tooling state, the screwing driving unit is connected with the screwing executing unit, and the first positioning base provides a mounting base for the second picking cylinder; the first connecting cylinder is connected with the base through hole pin hole, and the switching function between the screwing driving unit and the screwing executing unit is achieved.

According to the screwing gun batch head replacing device provided by the invention, the reset piece positioned in the second picking cylinder provides lift force, so that the second batch head is reset after the second batch head works.

Furthermore, when the screwing module needs to be replaced by a new batch head, an external air source introduces atmospheric air or positive pressure air source into the sealed cavity between the first adsorption end cover and the first positioning base through the end cover vent pipe, so that the separation of the upper part from the original lower part is realized; when the first adsorption end cover moves to the position above the new lower part, the air pipe of the end cover is vacuumized, and the combination of the upper part and the new lower part is realized. In the process of combining the upper part and the lower part, the first connecting cylinder and the first positioning base are matched through a pin hole to realize positioning in the horizontal direction, and the reverse friction torque generated when the first batch head and the second batch head rotate is overcome through the matching of a square hole and a first connecting hole. In the process that the first adsorption end cover adsorbs the first positioning base, the first adsorption end cover is attached to the first positioning base through a surface to surface fit, so that the vertical positioning of the first positioning base and the sealing of a closed cavity of the first adsorption end cover are realized.

Further, when the tightening module provided by the invention is used, the external electromagnetic valve can be used for controlling the vacuum state of the closed chamber formed by the first picking pipe of the tightening driving unit, the second batch head of the tightening execution unit, the second picking cylinder and the member to be tightened, so as to realize the picking and placing of the member to be tightened. When an external electromagnetic valve controls the closed chamber to be pumped into vacuum, the to-be-screwed piece is picked up; when positive pressure is introduced or atmosphere is introduced, the placement of the piece to be screwed is realized. When the to-be-screwed member is screwed and dismounted, a first batch head of a screwing driving unit moves downwards, is connected with a second batch head of the screwing execution unit, and drives the second batch head to move downwards simultaneously to realize the screwing and dismounting of the to-be-screwed member; when the first batch of head of screwing up the module moves upward and resets, the second batch of head realizes resetting under the driving of piece that resets.

Therefore, the tightening driving unit and the tightening execution unit after connection are integrated into a whole, and the requirements of picking, placing, tightening and disassembling of the piece to be tightened are well met.

The screwing detachable unit of the screwing gun batch head replacing device not only can realize detachable connection between the screwing driving unit and the screwing executing unit through vacuum adsorption force, but also can realize detachable connection between the screwing driving unit and the screwing executing unit through mechanical force, provides more selection possibilities, and can meet actual requirements of different working conditions.

Drawings

Fig. 1 is a schematic structural diagram of one of the tightening modules for locking screws in the prior art;

FIG. 2 is a partially enlarged schematic view of the picking tube and the tightening bit of FIG. 1;

fig. 3 is a schematic cross-sectional structural view of a batch head replacing device of a tightening gun according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the batch head changer of the tightening gun in FIG. 3 in a separated state;

FIG. 5 is a schematic structural view of the batch head exchanging device of the tightening gun in FIG. 3 in a tightening/dismantling state;

FIG. 6 is a schematic structural view of the lock nut of FIG. 3;

FIG. 7 is a schematic view of the first absorbent end cap configuration of FIG. 3;

FIG. 8 is a schematic view of the first connecting cylinder shown in FIG. 3;

FIG. 9 (a) is a schematic front view of the first positioning base of FIG. 3;

FIG. 9 (b) isbase:Sub>A schematic sectional view A-A' of FIG. 9 (base:Sub>A);

FIG. 10 is a schematic view of the second batch head structure in FIG. 3;

FIG. 11 is a schematic view of the second pick up drum of FIG. 3;

fig. 12 is a schematic structural view of a screwing gun batch head replacing device in which a pick-up port of the second pick-up cylinder in fig. 3 is provided with a magnet;

fig. 13 is a schematic structural view of a batch head replacing device of a tightening gun according to a second embodiment of the present invention;

fig. 14 (a) is a schematic structural view of a batch head replacing device of a tightening gun according to a third embodiment of the present invention;

FIG. 14 (b) is a schematic structural view of the second spring-plunger coupling element of FIG. 14 (a);

fig. 15 is a schematic structural view of a batch head replacing device of a tightening gun according to a fourth embodiment of the present invention;

wherein the reference numerals are as follows:

110-mounting base, 120-sliding guide rail, 130-propelling cylinder, 140-connecting block, 150-screwing gun, 160-picking pipe, 170-screwing batch head, 180-compression spring and 190-screw to be screwed;

210-first pick-up drum, 220-first batch head, 221-head of first batch head;

310-a second picking cylinder, 311-a first sub picking cylinder, 312-a second sub picking cylinder, 313-a third sub picking cylinder, 314-a picking port of the second picking cylinder, 320-a second batch head, 321-a head of the second batch head, 322-a tail of the second batch head, 323-a body of the second batch head, 324a, 324b, 324c, 324 d-a batch head vent hole, 325-a groove, 326-a spring, 327-a magnet;

401-a closed chamber;

411-first adsorption end cap, 411 a-end cap first vent pipe, 411 b-end cap second vent pipe, 412-first connecting cylinder, 413-locking nut;

421-a first positioning base, 421 a-a first positioning base fixing part, 421 b-a first positioning base extending part, 421b 1-a first positioning base extending connecting part, 421b 2-a first positioning base extending positioning part, 421 c-a base through hole, 421c 1-a first connecting hole, 421c 2-a second connecting hole, 421c 3-a third connecting hole, 422-a first screw;

431-an electromagnet;

451-first spring plunger connecting piece, 451 a-first spring plunger hole;

461-second spring plunger connecting piece, 461 a-second spring plunger fixing part, 461 b-second spring plunger extending part and 461 c-spring plunger;

471-chuck drive body, 472-drive chamber, 473-chuck vent, 474-jaw stop, 475-jaw guide, 476-jaw reset, 477-chuck jaws, 478-chuck locating hole;

481-chuck body, 482-claw locking groove;

501-communicating a cavity;

601-second screw.

Detailed Description

In order to make the objects, advantages and features of the present invention more apparent, a bit exchanging device and a tightening module of a tightening gun according to the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

The core idea of the invention is to provide a replacing device for a screw gun bit, so that one screw module can meet the dismounting requirements of parts to be screwed in various specifications.

In order to achieve the above object, the present invention provides a replacement device for a bit of a tightening gun, comprising a tightening execution unit, a tightening driving unit and a tightening detachable unit, wherein the tightening driving unit is fixed on a tightening module; the tightening execution unit is detachably connected with the tightening driving unit through the tightening detachable unit and is used for being matched with a piece to be tightened; when the tightening execution unit is connected with the tightening driving unit, the tightening driving unit is used for driving the tightening execution unit to disassemble and assemble the piece to be tightened.

The invention creatively provides a screwing gun bit replacing device, which changes a screwing module from an integrated structure to a split structure, wherein the screwing driving unit is used as a universal part, the screwing executing unit is used as an optional part, and the screwing detachable unit is used as a standard interface, so that the universal part and the optional part are integrally connected through the standard interface. After the tightening driving unit is connected with the tightening executing unit, power and working media (such as air) can be transmitted between the tightening driving unit and the tightening executing unit.

The invention also provides a screwing module which comprises the screwing gun batch head replacing device.

< first embodiment >

The embodiment provides a screwing gun bit replacing device which comprises a screwing execution unit, a screwing driving unit and a screwing detachable unit, wherein the screwing driving unit of the screwing gun bit replacing device is fixed on a screwing module; the tightening execution unit is detachably connected with the tightening driving unit through the tightening detachable unit and is matched with a piece to be tightened; when the tightening execution unit is connected with the tightening driving unit, the tightening driving unit is used for driving the tightening execution unit to disassemble and assemble the piece to be tightened.

Specifically, referring to fig. 3 to 12 as an exemplary embodiment, the tightening driving unit includes a first picking cylinder 210 and a first picking head 220, the first picking cylinder 220 is located in a cavity of the first picking cylinder 210, one end of the first picking cylinder 210 is fixed on the tightening module, a tail portion (not shown) of the first picking head is fixed on the tightening module, and a head portion 221 of the first picking head is used for connecting with the tightening performing unit. Further, the tightening execution unit includes a second picking cylinder 310 and a second batch head 320, the second picking cylinder 310 is a through cylinder, two ends of the second picking cylinder are respectively a connection end (not labeled in the figure) of the second picking cylinder and a picking port 314 of the second picking cylinder, the connection end of the second picking cylinder is used for being connected with the other end of the first picking cylinder 210, the second batch head 320 is located in a cavity of the second picking cylinder 310, and a head 321 of the second batch head is adapted to the member to be tightened. The screwing detachable unit comprises a first connecting assembly and a second connecting assembly, the first connecting assembly is fixedly arranged on the outer wall of the first picking cylinder 210, the second connecting assembly is fixedly arranged on the outer wall of the second picking cylinder 310, and the first connecting assembly and the second connecting assembly can be detachably connected. Preferably, when the tightening actuator unit is connected to the tightening drive unit, the first picking cylinder 210 is in communication with the second picking cylinder 310, and the head 221 of the first batch head is connected to the tail 322 of the second batch head. Obviously, the positional relationship between the first connecting assembly and the first picking cylinder and the positional relationship between the second connecting assembly and the second picking cylinder are only descriptions of preferred embodiments, and do not limit the present invention, nor do they constitute any limitation to the present invention.

Preferably, as one of the exemplary embodiments, as shown in fig. 3 and fig. 5, the first connecting assembly is disposed on an outer wall of the first picking cylinder 210 near the head 221 of the first batch head; the second connecting assembly is disposed on the outer wall of the second picking cylinder 310 near the connecting end of the second picking cylinder.

Next, referring to fig. 3 to 12, the first connecting member and the second connecting member of the screwing detachable unit, the screwing execution unit, and the screwing driving unit of the screwing gun bit exchanging device according to the present embodiment will be described in detail.

Preferably, the first connection assembly includes a first adsorption end cap 411, and the first adsorption end cap 411 is fixedly disposed at the outer circumference of the first pick-up cylinder 210.

Preferably, the second connecting assembly includes a first positioning base 421, the first positioning base 421 includes a first positioning base fixing portion 421a and a first positioning base extending portion 421b, and the first positioning base fixing portion 421a and the first positioning base extending portion 421b are integrally formed or fixedly connected. Preferably, the first positioning base fixing portion 421a and the first positioning base extending portion 421b are integrally formed. Wherein the first positioning base fixing part 421a is fixedly disposed at the outer circumference of the second pick up cylinder 310; the outer wall of the first positioning base extension 421b matches the inner wall of the first adsorption end cap 411; the first positioning base extension 421b has a base through hole 421c, and the inner wall of the base through hole 421c matches with the outer wall of the first pick-up cylinder 210. When the first positioning base extension part 421b is inserted into the first adsorption end cap 411, the first positioning base extension part 421b, the first adsorption end cap 411 and the first pick-up cylinder 210 together form a closed chamber 401.

Preferably, the first connection assembly further comprises at least one end cap vent pipe disposed at the cover portion of the first adsorption end cap 411. The end cover vent pipe is used for being communicated with a gas source to change the gas pressure state in the closed chamber 401, so as to control the connection or the disconnection of the screwing execution unit and the screwing driving unit. In this embodiment, the first vent pipe 411a and the second vent pipe 411b are disposed on the cover of the first adsorption end cover 411. Herein, the "connection or disconnection" should be understood in a broad sense and not in a narrow sense as the screwing and disconnecting unit can only connect or disconnect the screwing execution unit and the screwing drive unit, but should be understood as the screwing and disconnecting unit can both connect and disconnect the screwing execution unit and the screwing drive unit, and the screwing drive unit and the screwing execution unit are in one of a connected state or an executed state at the same time.

When the tightening driving unit and the tightening performing unit are connected, the first picking cylinder 210, the base through hole 421c, and the second picking cylinder 310 form a communicating chamber 501.

Thus, when the first positioning base extension 421b is inserted into the first adsorption end cap 411 and the first picking cylinder 210 is inserted into the base through hole 421c, the first adsorption end cap 411 is nested in the first positioning base 421, and the first positioning base 421 is nested in the layer-by-layer nested connection of the first picking cylinder 210 and the second picking cylinder 310, so that the first positioning base extension 421b, the first adsorption end cap 411 and the first picking cylinder 210 together form a closed chamber 401, thereby connecting the tightening execution unit and the tightening driving unit into a whole more tightly.

In still another exemplary embodiment, as shown in fig. 3, 5 and 8, the first connection assembly further includes a first connection cylinder 412, the first connection cylinder 412 is fixedly disposed at the periphery of the first pick-up cylinder 210 and is located between the first pick-up cylinder 210 and the first adsorption end cap 411, the first adsorption end cap 411 is fixedly disposed at the periphery of the first connection cylinder 412, and further, the outer wall of the first connection cylinder 412 is matched with the inner wall of the base through hole 421 c. Preferably, the other end of the first connecting cylinder is fixedly connected with the tightening module. The first connecting cylinder 412 is sleeved on the outer wall of the first picking cylinder 210, and a universal standard interface is provided for installing various detachable connecting components. Referring to fig. 3, the first positioning base extension part, the first adsorption end cap and the first pick-up cylinder together form a sealed chamber, including that the outer wall of the first connection cylinder 412 is embedded into the base through hole 421c, and the first positioning base extension part 421b, the first adsorption end cap 411 and the first connection cylinder 412 together form a sealed chamber 401. The first picking cylinder 210, the base through hole 421c and the second picking cylinder 310 form a communicating cavity 501. The first picking cylinder 210, the first connecting cylinder 412, the base through hole 421c and the second picking cylinder 310 form a communicating cavity 501.

Preferably, referring to fig. 3, 5 and 6, the first connection assembly further includes a locking nut 413, and preferably, the first adsorption end cap 411 has a first adsorption end cap fixing portion (not shown) located between the first connection cylinder 412 and the locking nut 413, and the locking nut 413 fixedly connects the first adsorption end cap 411 and the first connection cylinder 412 through the first adsorption end cap fixing portion.

Thereby, the locking nut 413 fixes the first suction cap 411 to the first connecting cylinder 412, and the first suction cap 411 is bound to the tightening driving unit. In the tool state, an external air source controls the vacuum adsorption force of the closed chamber 401 formed by the first adsorption end cover 411 and the first positioning base 421 through the end cover vent pipe, so as to realize the connection and positioning of the screwing execution unit and the screwing driving unit. The binding between the first connecting cylinder 412 and the first picking cylinder 210 functions as a transfer from the tightening driving unit to the tightening performing unit. The connection of the second batch head 320 and the first batch head 220 realizes the screwing and the unscrewing of the piece to be screwed.

Preferably, referring to fig. 3, 5, 8, 9 (a) and 9 (b), the base through hole 421c includes a first connection hole 421c1 and a second connection hole 421c2, an inner diameter of the first connection hole 421c1 is larger than an inner diameter of the second connection hole 421c2 such that the base through hole 421c is stepped, and the second connection hole 421c2 is close to the first positioning base fixing portion 421a. The outer wall of the first connecting cylinder 412 is matched with the inner walls of the first connecting hole 421c1 and the second connecting hole 421c2, and the first connecting cylinder 412 can be detachably connected with the base through hole 421c in a pin hole mode. Further, the first connection hole 421c1 is a square hole, and the second connection hole 421c2 is a circular hole. During the connection of the tightening driving unit and the tightening performing unit, the first connection cylinder 412 and the first positioning base 421 are horizontally positioned by the pin-hole engagement, and the "reverse friction torque" generated by the rotation of the second batch head 320 is overcome by the engagement of the "square-hole" first connection hole 421c 1. In the process of adsorbing the first positioning base 421 by the first adsorbing end cap 411, the first adsorbing end cap 411 and the first positioning base 421 realize vertical positioning of the first positioning base 421 through surface-to-surface fitting, and vacuum sealing with the closed chamber 401 of the first adsorbing end cap 411.

Preferably, referring to fig. 3, 5, 8, 9 (a) and 9 (b), the base through hole 421c further includes a third connection hole 421c3, the third connection hole 421c3 is located between the second connection hole 421c2 and the first positioning base fixing portion 421a, and an inner diameter of the third connection hole 421c3 is smaller than an inner diameter of the second connection hole 421c 2. When the first connection cylinder 412 is connected to the first positioning base 421, the first adsorption end cap 411 is used for realizing vertical positioning, the first connection hole 421c1 and the second connection hole 421c2 are used for realizing horizontal positioning, and the third connection hole 421c3 is used for limiting the position of the second batch head 320 so as to prevent the second batch head from popping upwards.

Preferably, as shown in fig. 9 (a) and 9 (b), the outer shape of the first positioning base 421 includes a stepped cylinder, and the outer diameter of the first positioning base extension portion 421b is larger than the outer diameter of the first positioning base fixing portion 421a. Further, the first positioning base extension part 421b is a stepped cylinder in shape, the first positioning base extension part 421b includes a base extension connecting part 421b1 and a base extension positioning part 421b2, and the outer wall of the base extension part connecting part 421b1 matches with the inner wall of the first adsorption end cap 411; the outer diameter of the base extension positioning part 421b2 is larger than the inner diameter of the first adsorption end cap 411, and further, the outer diameter of the base extension positioning part 421b2 matches the outer diameter of the first adsorption end cap 411. The external structure of the first positioning base 421 well realizes the connection and fixation of the first positioning base 421 and the first adsorption end cap in the horizontal direction and the vertical direction.

Preferably, referring to fig. 3 and 5, the second connecting assembly further includes at least one fastener, and the first positioning base fixing part 421a and the second picking cylinder 310 are fixedly connected by the fastener. In one embodiment, the fastener includes a first screw 422. Obviously, this is only a description of the preferred embodiment, not a limitation of the present invention, and in other embodiments, the first positioning base fixing portion 421a and the second picking drum 310 include, but are not limited to, screw connection or glue joint, etc.

In yet another exemplary embodiment, referring to fig. 3, 4, 5 and 10, the tail 322 of the second batch head matches with the inner wall of the second picking cylinder 310, and the second batch head 320 and the second picking cylinder 310 are slidably connected through the tail 322 of the second batch head.

Preferably, the second batch head 320 further comprises at least one batch head vent hole, and the batch head vent hole penetrates through the tail 322 of the second batch head along the extending direction of the second batch head 320. Preferably, the second batch head further comprises four batch

head vent holes

324a, 324b, 324c and 324d, and the four batch head vent holes are uniformly distributed at the tail 322 of the second batch head. Preferably, the first picking cylinder communicating with the second picking cylinder comprises that the first picking cylinder 210, the four batch

head vent holes

324a, 324b, 324c and 324d and the second picking cylinder 310 communicate to form the communication cavity 501.

Preferably, the head 221 of the first batch head is clamped with the tail 322 of the second batch head. Specifically, the tail portion 322 of the second batch head is provided with a groove 325, and the groove 325 is matched with the head portion 221 of the first batch head. The first batch of head 221 and the second batch of head tail 322 joint includes, the first batch of head 221 embedding the groove 325, the first batch of head 220 and the second batch of head 320 through the groove 325 joint. Preferably, the notch 325 is located at the center of the tail 322 of the second lot head. This snap-fit arrangement allows the first batch head 220 and the second batch head 320 to be more securely connected together. It is to be understood that this is merely a description of the preferred embodiment and is not a limitation of the invention.

In yet another exemplary embodiment, the tightening performing unit further includes an elastic member located within the cavity of the second picking cylinder 310; the compression direction of the elastic piece is consistent with the extension direction of the second batch head. Preferably, with continued reference to fig. 3 and 5 in conjunction with fig. 11, the second picking drum 310 includes a first sub picking drum 311 and a second sub picking drum 312, the first sub picking drum 311 is close to the connection end of the second picking drum, and the inner diameter of the first sub picking drum 311 is larger than the inner diameter of the second sub picking drum 312. The elastic piece is arranged in the cavity of the first sub-picking cylinder 311 and is positioned between the tail 322 of the second batch head and the second sub-picking cylinder 312; the second sub picking cylinder 312 is close to the picking port 314 of the second picking cylinder, and the inner diameter of the second sub picking cylinder 312 is smaller than the outer diameter of the tail 322 of the second batch head. Preferably, the elastic member comprises a spring 326, and the body 323 of the second batch head penetrates through the inner cavity of the spring 326. The spring 326 provides a lifting force to enable the second batch head 220 to reset after the work is finished, the first batch head moves downwards when the member to be screwed is screwed and disassembled, and the first batch head 220 is connected with the second batch head 320 and moves downwards simultaneously to realize the screwing and disassembling of screws.

Preferably, the second picking cylinder 310 further comprises a third sub picking cylinder 313, the third sub picking cylinder 313 is close to the picking port 314 of the second picking cylinder, the third sub picking cylinder 313 is connected with the second sub picking cylinder 312, the inner diameter of the third sub picking cylinder 313 is larger than the inner diameter of the second sub picking cylinder 312, the inner wall of the third sub picking cylinder 313 matches with the member to be screwed, and the second sub picking cylinder 312 is located between the first sub picking cylinder 311 and the third sub picking cylinder 313.

Preferably, referring to fig. 12, the pick-up port of the second pick-up cylinder is fixedly provided with a magnet 327. The magnet 327 can increase the attraction force to the iron member to be attracted, and improve the reliability of the tightening execution unit in picking up.

Preferably, the member to be tightened comprises a second screw 601, and the head 321 of the second bit is matched with the nut of the second screw 502. Obviously, this is not a limitation of the invention.

In yet another embodiment, the tightening gun bit exchanging device further comprises a solenoid valve (not shown in the figure). Referring to fig. 3, when the tightening performing unit is connected to the tightening driving unit, the solenoid valve is used to control the air pressure inside the cavities of the first picking cylinder 210 and the second picking cylinder 310 to pick or place the member to be tightened, and when the second picking cylinder 310 picks or places the member to be tightened, the head 321 of the second batch head is located inside the cavity of the second picking cylinder 310. As shown in fig. 12, a schematic structural diagram of the magnet attracting the second screw 601 is shown.

Preferably, referring to fig. 5, when the tightening performing unit is connected to the tightening driving unit, the first batch head 220 is used to move and rotate the second batch head 320 to tighten or loosen the member to be tightened, and the head 321 of the second batch head is located outside the cavity of the second pick up cylinder 310 when the second batch head 320 tightens or loosens the member to be tightened.

The invention also provides a tightening module, which comprises the tightening gun bit replacing device provided by any one of the above embodiments, wherein the tightening driving unit is fixed on the tightening module through the first picking cylinder and the first picking head, the tightening driving unit drives the tightening executing unit to disassemble and assemble the piece to be tightened by means of power provided by the tightening module, and the tightening executing unit is detachably connected with the tightening module by means of the tightening detachable unit.

In summary, the tightening gun bit replacing device provided by the embodiment includes a tightening driving unit and a tightening executing unit, which can be divided into an upper portion and a lower portion, wherein the tightening driving unit and the first connecting cylinder are connected to a tightening module, and the tightening executing unit is disposed on a material rack to be taken; the upper part and the lower part are connected and positioned in a vacuum adsorption mode. Further, an external air source controls the vacuum adsorption force in the closed cavity formed by the first adsorption end cover and the first positioning base through the end cover vent pipe, so that the connection and the separation of the screwing execution unit and the screwing driving unit are realized; thereby realizing the quick replacement of the tightening execution unit.

The first connecting cylinder is fixed with the first picking cylinder, and the locking nut fixes the first adsorption end cover and the first connecting cylinder, so that the first adsorption end cover and the first picking cylinder are bound. The screwing driving unit provides power for the rotation motion and the up-and-down motion of the second batch head through the first picking cylinder, and the picking and placing of the to-be-screwed piece are realized through the vacuum adsorption of a closed chamber formed by the first picking cylinder, the second picking cylinder and the to-be-screwed piece.

Further, in a tooling state, the tightening driving unit is connected with the tightening executing unit, and the first positioning base is a mounting base of the second picking cylinder; the first connecting cylinder is connected with the base through hole pin hole, and the switching function between the screwing driving unit and the screwing executing unit is achieved. The reset piece positioned in the second picking cylinder provides lifting force, so that the second batch head is reset after the second batch head is worked.

The following is a brief description of how to use the present invention for replacing the batch head of the tightening gun. When the screwing module needs to replace a new bit, an external air source introduces atmosphere or positive pressure air source into a sealing cavity between the first adsorption end cover and the first positioning base through the end cover vent pipe, so that the separation of the upper part from the original lower part is realized; when the first adsorption end cover moves to the position above the new lower part, the vent pipe of the end cover is communicated with vacuum, and the combination of the upper part and the new lower part is realized. In the process of combining the upper part and the lower part, the first connecting cylinder and the first positioning base are positioned in the horizontal direction through the pin-hole fit, and the reverse friction torque generated when the first batch head and the second batch head rotate is overcome through the square hole fit. In the process that the first adsorption end cover adsorbs the first positioning base, the first adsorption end cover and the first positioning base are attached through a surface to achieve the vertical positioning of the first positioning base and the sealing of the closed cavity of the first adsorption end cover.

When the tightening module provided by the invention is used, an external electromagnetic valve can be used for controlling the vacuum state of a closed chamber formed by the first picking pipe of the tightening driving unit, the second batch head of the tightening execution unit, the second picking cylinder and the to-be-tightened piece, so that the to-be-tightened piece can be picked and placed. When an external electromagnetic valve controls the closed chamber to be pumped into vacuum, the to-be-screwed piece is picked up; when positive pressure is introduced, the placement of the piece to be screwed is realized. When the to-be-screwed member is screwed and dismounted, a first batch head of a screwing driving unit moves downwards to be in contact with a second batch head of the screwing execution unit, and drives the second batch head to move downwards simultaneously to realize the screwing and dismounting of the to-be-screwed member; when the second batch head of screwing up the module moves upwards and resets, the second batch head realizes resetting under the driving of the resetting piece.

Therefore, the screwing gun bit replacing device provided by the invention fully utilizes vacuum adsorption to realize quick positioning and clamping of the screwing execution unit, has the advantages of simple and compact structure, high reliability and convenience for quick replacement, and saves the cost while improving the working efficiency.

< example II >

The present embodiment provides another kind of screwing gun batch head replacing device, as shown in fig. 13, which is a schematic structural diagram of two different screwing gun batch head replacing devices provided in the present embodiment respectively, and the screwing gun batch head replacing device provided in the present embodiment is different from the first embodiment in that the connection or separation state of the screwing execution unit and the screwing driving unit is realized through vacuum force, and the screwing gun replacing device provided in the present embodiment completes the quick replacement of the screwing execution unit through magnetic attraction force. In this embodiment, the first connecting assembly includes an electromagnet 431, and the first connecting assembly is fixedly disposed on an outer wall of the first picking cylinder and includes that the electromagnet is disposed at one end of the first picking cylinder for connecting to the second picking cylinder; the second connecting assembly is made of a ferrous or magnetic material; when the electromagnet is in a power-on state, the tightening execution unit is connected with the tightening driving unit, and when the electromagnet is in a power-off state, the tightening execution unit is separated from the tightening driving unit.

< example three >

In another embodiment of the present invention, as shown in fig. 14 (a), for the structure of the tightening gun bit exchanging device provided in this embodiment, unlike the first embodiment in which the tightening actuating unit and the tightening driving unit are connected or separated by the vacuum force, the tightening gun bit exchanging device provided in this embodiment completes the quick replacement of the tightening actuating unit by the spring-plunger scheme. In this embodiment, the first coupling assembly includes a first spring-plunger coupling member 451 and at least one first spring-plunger aperture 451a, the first spring-plunger aperture 451a being disposed on the first spring-plunger coupling member 451; the first spring plunger coupling member 451 is fixedly disposed at the outer circumference of the first pickup cylinder 210. The second connecting assembly includes a second spring plunger connector 461 and a spring plunger 461c matched with the first spring plunger hole 451a, and the second spring plunger connector 461 includes a second spring plunger fixing portion 461a and a second spring plunger extending portion 461b. Further, the second connecting assembly is fixedly disposed on the outer wall of the second picking cylinder, and the second spring plunger fixing portion 461a is fixedly disposed on the outer circumference of the second picking cylinder 310. Further, referring to fig. 14 (b), the second spring plunger extension 461b is a cylindrical structure, and the inner wall of the second spring plunger extension 461b matches with the outer wall of the first spring plunger connector 451.

The spring plunger 461c is configured to change a locking state of the first spring plunger link 451 and the second spring plunger link 461 through the first spring plunger hole 451a to control connection or disconnection of the tightening performing unit and the tightening driving unit. Preferably, the first spring plunger bore 451a comprises a blind or through bore.

< example four >

As shown in fig. 15, for the structure schematic diagram of the tightening gun bit replacing device provided in this embodiment, the tightening gun bit replacing device provided in this embodiment is different from the first embodiment in which the connection or separation relationship between the tightening execution unit and the tightening driving unit is realized by a vacuum force, and the tightening gun replacing device provided in this embodiment completes the quick replacement of the tightening execution unit by a chuck scheme. In the present embodiment, the first coupling assembly includes a chuck driving part having chuck jaws, and the second coupling assembly includes a chuck body 481. Wherein, the chuck driving part is fixedly arranged at the periphery of the first picking cylinder 210, and preferably, a connecting cylinder can be arranged between the chuck driving part and the first picking cylinder 210 for guiding; the chuck body is fixedly arranged on the outer wall of the second picking cylinder 310, and particularly, the chuck driving part is matched with the chuck body; the chuck driving part is used for driving the locking state of the chuck jaws and the chuck body so as to control the connection or the separation of the tightening execution unit and the tightening driving unit.

Specifically, the chuck driving part includes a chuck driving part body 471 having a cavity, a driving chamber 472 located in the cavity of the chuck driving part body 471, a chuck vent pipe 473 communicated with the driving chamber 472, a chuck stopper 474 movably disposed inside the driving chamber 472, a jaw guide 475, a jaw reset 476 and a chuck jaw 477, and a jaw positioning hole 478 passing through the driving chamber 472. Wherein, the chuck vent tube 473 is connected with an external air source; the chuck jaws 477 are located between the jaw positioning holes 478 and the jaw guides 475, and the jaw guides 475 are wedge-shaped members capable of being moved in the extending direction of the driving chamber 472 by the jaw stoppers 474 and the jaw release 476; the chuck jaws 477 mate with the jaw positioning holes 478.

Preferably, the second connector further includes a jaw locking groove 482, and the chuck body 481 includes a chuck body fixing portion (not shown) fixedly connected to an outer wall of the second pick up cylinder 310 and a chuck body extending portion (not shown) having a cylindrical structure. The jaw locking groove 482 is fixedly disposed on an outer wall of the chuck body extension. Preferably, an inner wall of the chuck body extension matches an outer wall of the first pick cylinder 210, and an outer wall of the chuck body extension matches an inner wall of the chuck driving part body 471. The chuck jaws 477, the jaw positioning holes 478, and the jaw locking grooves 482 mate.

When connecting the tightening drive unit with the tightening execution unit, first, the atmospheric pressure of the drive chamber 472 is increased by the air source through the chuck vent tube 473, the chuck stopper 474 moves toward the claw return 476 side, the reaction force of the claw return 476 is overcome, and the claw guide 475 is pushed to move toward the claw return 476, and the chuck claw 477 is in a relaxed state; further, matching the outer wall of the chuck body extension with the inner wall of the chuck drive body 471 and pressing down the tightening drive unit to drive the chuck drive body with the chuck body until the jaw positioning holes 478 and the jaw locking grooves 482 are aligned, the air source reduces the atmospheric pressure of the drive chamber 472 through the chuck vent tube 473 until the jaw reset 476 is reset, thereby pushing the jaw guide 475 to move in the direction of the jaw stopper 474 so that the chuck jaws 477 enter the jaw positioning holes 478 and the jaw locking grooves 482, locking the tightening actuator with the tightening drive unit. Similar to the embodiment, the first picking cylinder 210 and the second picking cylinder 310 are communicated, and the first batch head 220 is clamped with the second batch head.

When separating the tightening drive unit from the tightening implement unit, the air supply increases the atmospheric pressure of the drive chamber 472 through the chuck vent tube 473, so that the jaw stopper 474 pushes the jaw guide 475 to compress the jaw return 476, sliding back to the drive chamber 472 from the jaw positioning hole 478 and the jaw locking groove 482 under the guidance of the jaw guide 475, thereby achieving automatic separation of the tightening drive unit from the tightening implement unit.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In summary, the above embodiments have been described in detail with respect to different configurations of the tightening gun batch head changing device and the tightening module, and it should be understood that the above description is only for the description of the preferred embodiment of the present invention and is not intended to limit the scope of the present invention in any way, the present invention includes but is not limited to the configurations listed in the above embodiments, and those skilled in the art can take the above embodiments in all three, and any changes and modifications made by those skilled in the art in light of the above disclosure are all within the protection scope of the appended claims.

Claims

1. The tightening gun bit replacing device is characterized by comprising a tightening execution unit, a tightening driving unit and a tightening detachable unit, wherein the tightening driving unit is used for being fixed on a tightening module;

when the tightening execution unit is connected with the tightening driving unit, the tightening driving unit is used for driving the tightening execution unit to disassemble and assemble the piece to be tightened;

the screwing driving unit comprises a first picking cylinder and a first batch head, the first batch head is positioned in a cavity of the first picking cylinder, one end of the first picking cylinder is fixed on the screwing module, the tail part of the first batch head is fixed on the screwing module, and the head part of the first batch head is used for being connected with the screwing execution unit;

the tightening execution unit comprises a second picking cylinder and a second batch head, the second picking cylinder is a through cylinder, the two ends of the second picking cylinder are respectively a connecting end of the second picking cylinder and a picking port of the second picking cylinder, the connecting end of the second picking cylinder is used for being connected with the other end of the first picking cylinder, the second batch head is positioned in a cavity of the second picking cylinder, and the head of the second batch head is matched with the piece to be tightened;

the tightening execution unit is connected with the tightening driving unit and comprises a first picking cylinder communicated with a second picking cylinder;

the tightening execution unit further comprises an elastic piece which is positioned in the cavity of the second picking cylinder;

the compression direction of the elastic piece is consistent with the extension direction of the second batch head;

the second picking cylinder comprises a first sub picking cylinder and a second sub picking cylinder, the first sub picking cylinder is close to the connecting end of the second picking cylinder, and the inner diameter of the first sub picking cylinder is larger than that of the second sub picking cylinder;

the second sub picking cylinder is close to the picking port of the second picking cylinder, and the inner diameter of the second sub picking cylinder is smaller than the outer diameter of the tail of the second batch head.

2. The tightening gun bit exchanging device according to claim 1, wherein the first connection assembly is disposed at an outer wall of the first picking cylinder near a head of the first bit;

3. The tightening gun batch head replacement device according to claim 1, wherein the first connection assembly comprises a first suction end cap fixedly disposed at an outer periphery of the first pick up cylinder;

the first connection assembly further comprises at least one end cap vent pipe disposed at the cover portion of the first adsorption end cap;

4. The tightening gun batch head replacement device according to claim 3, wherein the number of the end cover vent pipes is two, and the two end cover vent pipes are evenly distributed on the cover part of the first adsorption end cover.

5. The tightening gun batch head replacement device according to claim 3, wherein the first connection assembly further comprises a first connection cylinder fixedly disposed at an outer periphery of the first pick cylinder and located between the first pick cylinder and the first adsorption end cap fixedly disposed at an outer periphery of the first connection cylinder;

6. The tightening gun batch head changing device according to claim 5, wherein the first connection assembly further comprises a lock nut, and the first suction end cap is fixedly connected with the first connecting cylinder through the lock nut.

7. The tightening gun batch head replacing device according to claim 5, wherein the base through hole includes a first connecting hole and a second connecting hole, the first connecting hole having an inner diameter larger than that of the second connecting hole such that the base through hole is stepped, the second connecting hole being close to the first positioning base fixing part;

the outer wall of first connecting cylinder with first connecting hole with the inner wall matching of second connecting hole, first connecting cylinder can with the base through-hole forms the pinhole and can dismantle the connection.

8. The tightening gun batch head replacement device according to claim 7, wherein the first connection hole comprises a square hole and the second connection hole comprises a circular hole.

9. The tightening gun batch head replacing device according to claim 7, wherein the base through hole further comprises a third connecting hole, the third connecting hole is located between the second connecting hole and the first positioning base fixing portion, and an inner diameter of the third connecting hole is smaller than an inner diameter of the second connecting hole.

10. The tightening gun batch head replacement device according to claim 3, wherein the first positioning base has an outer shape comprising a stepped cylinder, and the first positioning base extension portion has an outer diameter larger than an outer diameter of the first positioning base fixing portion.

11. The tightening gun bit replacing device according to claim 3, wherein the first positioning base extension part comprises a base extension connecting part and a base extension positioning part, the outer shape of the first positioning base extension part comprises a stepped cylinder, and the outer wall of the base extension part connecting part is matched with the inner wall of the first adsorption end cover; the outer diameter of the base extension positioning part is larger than the inner diameter of the first adsorption end cover.

12. The tightening gun batch head changing device according to claim 3, wherein the second connecting assembly further comprises at least one fastener by which the first positioning base fixing part and the second picking cartridge are fixedly connected.

13. The tightening gun bit exchanging device according to claim 1, wherein a tail portion of the second bit is matched with an inner wall of the second picking cylinder, and the second bit and the second picking cylinder are slidably connected through the tail portion of the second bit.

14. The tightening gun batch head replacement device according to claim 13, wherein the second batch head further comprises at least one batch head vent hole, and the batch head vent hole penetrates through the tail of the second batch head in the extension direction of the second batch head.

15. The tightening gun batch head replacing device according to claim 14, wherein the second batch head comprises four batch head vent holes, and the batch head vent holes are uniformly distributed at the tail of the second batch head.

16. The tightening gun batch head replacement device according to claim 14, wherein the first picking cartridge being in communication with the second picking cartridge comprises the first picking cartridge, the batch head vent, and the second picking cartridge being in communication.

17. The tightening gun bit replacing device according to claim 1, wherein the tightening performing unit is connected to the tightening driving unit, and the head of the first bit is engaged with the tail of the second bit.

18. The tightening gun batch head replacing device according to claim 17, wherein a groove is formed in the tail of the second batch head, the groove is matched with the head of the first batch head, the head of the first batch head is clamped with the tail of the second batch head, the head of the first batch head is embedded into the groove, and the first batch head and the second batch head are clamped through the groove.

19. The tightening gun bit exchanging device according to claim 18, wherein the recess is located at a center of a rear portion of the second bit.

20. The tightening gun bit replacing device according to claim 1, wherein the elastic member comprises a spring, and the body of the second bit extends through an inner cavity of the spring.

21. The tightening gun block head replacing device according to claim 20, wherein the second picking cylinder further comprises a third sub-picking cylinder connected to the second picking cylinder near the picking end of the second picking cylinder, the third sub-picking cylinder having an inner diameter larger than that of the second sub-picking cylinder, and an inner wall of the third sub-picking cylinder matching the member to be tightened.

22. The tightening gun batch head replacement device according to claim 1, wherein the pick-up port of the second pick-up barrel is fixedly provided with a magnet.

23. The tightening gun bit replacing device according to claim 1, further comprising a solenoid valve, wherein when the tightening executing unit is connected to the tightening driving unit, the tightening driving unit is configured to drive the tightening executing unit to disassemble and assemble the member to be tightened, the solenoid valve is configured to control a pressure state in the cavity of the first picking cylinder and the second picking cylinder to pick or place the member to be tightened, and when the second picking cylinder picks or places the member to be tightened, the head of the second bit is located in the cavity of the second picking cylinder.

24. The tightening gun bit exchanging device according to claim 1, wherein the tightening actuating unit is configured to drive the tightening actuating unit to disassemble and assemble the member to be tightened when the tightening actuating unit is connected to the tightening driving unit,

25. The tightening gun batch head replacement device according to claim 1, wherein the first connecting assembly comprises an electromagnet, the first connecting assembly is fixedly arranged on the outer wall of the first picking barrel and comprises the electromagnet, and the electromagnet is arranged at one end of the first picking barrel for connecting with the second picking barrel;

the second connecting assembly is made of a ferrous or magnetic material;

26. The tightening gun batch head changing device according to claim 1, wherein the first connection assembly comprises a first spring-plunger connector and at least one first spring-plunger bore, the first spring-plunger bore being disposed on the first spring-plunger connector;

27. The tightening gun batch head changing device according to claim 26, wherein the first spring plunger bore comprises a blind bore or a through bore.

28. The tightening gun batch head replacement device according to claim 1, wherein the first connection assembly includes a chuck drive having chuck jaws, and the second connection assembly includes a chuck body;

the first connecting assembly is fixedly arranged on the outer wall of the first picking cylinder, and the chuck driving part is fixedly arranged on the periphery of the first picking cylinder;

the chuck driving part is matched with the chuck body;

29. The tightening gun batch head changing device according to claim 28, wherein the chuck driving part comprises a chuck driving part body having a cavity, a driving chamber located in the cavity of the chuck driving part body, a chuck vent pipe communicated with the driving chamber, chuck stoppers, jaw guides, jaw resets, and the chuck jaws movably disposed inside the driving chamber, and jaw positioning holes penetrating the driving chamber;

the chuck vent pipe is connected with an external air source, the chuck jaws are positioned between the jaw positioning holes and the jaw guide piece, and the jaw guide piece comprises a wedge piece which can be pushed by the chuck stop block and the jaw resetting piece to move along the extension direction of the driving cavity; the chuck jaws are matched with the jaw positioning holes;

the second connecting assembly further comprises a clamping jaw locking groove, the chuck body comprises a chuck body fixing part and a chuck body extending part, the chuck body fixing part is fixedly connected with the outer wall of the second picking cylinder, and the chuck body extending part comprises a cylindrical structure;

the chuck jaw, the jaw positioning hole and the jaw locking groove are matched.

30. A tightening module comprising the tightening gun block head exchanging device according to any one of claims 1 to 29.