Quick-change module and tightening device

Abstract

The utility model provides a quick-change module and a tightening device, and belongs to the technical field of bolt tightening. The quick-change module is used for being connected with a tightening device, the tightening device at least comprises a tightening unit and a bit unit, the bit unit is provided with a lock groove, and the quick-change module comprises a main body piece, a main body piece, a main body piece, a main body piece and a main body piece body, and the main body piece body is provided with an inner cavity and a horn mouth, the top of the main body piece is used for being connected with the tightening unit; the movable cylinder is movably arranged in the inner cavity and is coaxial with the horn mouth, and the movable cylinder can move in the axis direction of the horn mouth relative to the main body piece; the plurality of first locking pieces are respectively arranged on the movable cylinder and can synchronously move along with the movable cylinder; and the limiting piece is fixed in the inner cavity, is arranged around the movable barrel and is matched with the first locking piece in the process that the movable barrel moves in the axis direction of the horn mouth, so that the first locking piece is clamped in the locking groove to lock the bit unit or is separated from the locking groove to release the bit unit.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bolt tightening technical field especially relates to a quick change module and tightening device. BACKGROUND

[0002] Screw fastening is a common form of mechanical assembly connection, and the fastening torque of the screw is a key index affecting its fastening performance. In the prior art, screw fastening usually adopts automatic tightening equipment. For example, a Chinese patent with publication number CN114871748A discloses an automatic quick change mechanism of a pickup type tightening module. The automatic quick change mechanism can realize adsorption and automatic tightening of the screw. The automatic quick change mechanism includes a quick change mechanism and a screw adsorption and tightening assembly. In the quick change mechanism, a driving member drives a movable locking member to move, thereby controlling the movable limiting member to clamp or release the screw pipe, and achieving convenient release of the screw adsorption and tightening assembly. However, the movable locking member only moves in the radial direction during the movement, so that the screw adsorption and tightening assembly cannot be well centered during the process of fixing the screw adsorption and tightening assembly, thereby making the screw adsorption and tightening assembly not well fit the horn mouth at the bottom of the quick change mechanism, and the vacuum property is not good. SUMMARY

[0003] In view of the above problems existing in the prior art, the purpose of the embodiments of the utility model is to provide a quick change module and a tightening device. The quick change module can make the bit unit firmly adhere to the horn mouth of the main body member, improve the vacuum property, increase the stability of the bit unit, and effectively center the bit unit.

[0004] The technical scheme adopted by the embodiments of the utility model is as follows:

[0005] A quick change module is used to connect a tightening device. The tightening device at least includes a tightening unit and a bit unit. The bit unit has a locking groove. The quick change module includes:

[0006] A main body member has an inner cavity. The top of the main body member is used to connect the tightening unit. The bottom of the main body member is provided with a horn mouth communicating with the inner cavity.

[0007] A movable cylinder is movably arranged in the inner cavity and coaxial with the horn mouth. The movable cylinder can move along the axis direction of the horn mouth relative to the main body member.

[0008] A plurality of first locking members are respectively arranged on the movable cylinder and can move synchronously with the movable cylinder.

[0009] A limiting member is fixed in the inner cavity and arranged around the movable cylinder. During movement of the movable cylinder in the first direction, the limiting member can apply an external force to the plurality of first locking members to move each first locking member in a direction close to the axis of the movable cylinder to be clamped into the locking slot of the chuck unit and lock the chuck unit. During movement of the movable cylinder in the second direction, the limiting member can remove the applied external force to move each first locking member in a direction away from the axis of the movable cylinder to be released from the locking slot of the chuck unit and release the chuck unit.

[0010] In some embodiments, the main body member has a sealed cavity independent of the inner cavity, and at least part of the movable cylinder extends into the sealed cavity;

[0011] The main body member is provided with a first interface and a second interface respectively communicating with the sealed cavity, and one of the interfaces can be used to introduce a medium into the sealed cavity and the other interface can be used to discharge the medium, so as to push the movable cylinder to move in the first direction or the second direction by the medium.

[0012] In some embodiments, the top of the main body member has a cylindrical portion extending into the inner cavity, and an annular space is defined between the outer peripheral wall of the cylindrical portion and the inner peripheral wall of the inner cavity. The end of the movable cylinder away from the trumpet mouth has a head portion extending into the annular space.

[0013] Sealing rings are arranged between the outer peripheral wall of the cylindrical portion and the inner peripheral wall of the movable cylinder, and between the inner peripheral wall of the inner cavity and the outer peripheral wall of the movable cylinder, so that the annular space forms the sealed cavity. The medium introduced into the sealed cavity can act on the head portion to push the movable cylinder to move.

[0014] In some embodiments, the main body member comprises a main cylinder, an upper cover and a bottom cover. The upper cover is used to cover the top open end of the main cylinder, and the bottom cover is used to cover the bottom open end of the main cylinder. The cylindrical portion is arranged on the upper cover, and the trumpet hole is arranged on the bottom cover.

[0015] The inner peripheral wall of the main cylinder is provided with an annular protruding portion. The limiting member is located between the protruding portion and the bottom cover of the main body member. The two ends of the limiting member are correspondingly clamped on the protruding portion and the bottom cover.

[0016] In some embodiments, the first locking member is a steel ball, the movable barrel is provided with a first lock hole matched with the first locking member, the first locking member is clamped in the first lock hole, the limiting member is a cylindrical structure, the inner diameter of the limiting member gradually decreases in the direction away from the trumpet mouth, so that the inner wall surface of the limiting member can abut against the first limiting member during the movement of the movable barrel in the first direction, so as to apply an external force to move the first locking member in the direction close to the axis of the movable barrel.

[0017] A tightening device, comprising:

[0018] The quick-change module according to any one of the preceding embodiments;

[0019] A tightening unit connected to the top of the main body of the quick-change module, the tightening unit comprising a driving shaft and a transmission shaft connected to the driving shaft;

[0020] A chuck unit comprising a sleeve assembly and a chuck member penetrating into the sleeve assembly, the chuck member being capable of rotating around the axis of the sleeve assembly, the outer peripheral wall of the sleeve assembly being provided with a lock groove, and the chuck member being used to connect with the transmission shaft.

[0021] In some embodiments, the sleeve assembly comprises an outer cylinder, an inner cylinder, a vacuum tube and a locking and releasing mechanism;

[0022] The inner cylinder is arranged inside the outer cylinder, the vacuum tube is connected with the outer cylinder, one end of the chuck member is used to connect with the transmission shaft of the tightening unit, and the other end of the chuck member penetrates into the inner cylinder and the vacuum tube in sequence;

[0023] The inner cylinder is capable of moving along the axis direction of the outer cylinder and has a first position and a second position in the moving direction thereof;

[0024] When the inner cylinder is located at the first position, the locking and releasing mechanism cooperates with the chuck member to lock the chuck member and limit the chuck member from being pulled out of the inner cylinder; when the inner cylinder is located at the second position, the locking and releasing mechanism is separated from the chuck member to release the chuck member and enable the chuck member to be pulled out of the inner cylinder.

[0025] In some embodiments, the outer peripheral wall of the chuck member is provided with a first annular groove;

[0026] The locking and releasing mechanism comprises a second annular groove arranged on the inner peripheral wall of the outer cylinder, a second lock hole arranged on the inner cylinder and a second locking member clamped in the second lock hole;

[0027] When the inner cylinder is in the first position, the second locking member is misaligned with the second annular groove, and at least part of the second locking member is clamped in the first annular groove; when the inner cylinder is in the second position, the second locking member is opposite to the second annular groove, and an external force applied to the batch head member can push at least part of the second locking member clamped in the second annular groove, and enable the batch head member to be pulled out of the inner cylinder.

[0028] In some embodiments, a limiting groove is arranged on the outer peripheral wall of the inner cylinder, and the extending direction of the limiting groove is consistent with the axial direction of the inner cylinder; a limiting pin is arranged on the outer cylinder and extends into the limiting groove;

[0029] The sleeve assembly further comprises a connecting pipe and a reset spring, one end of the connecting pipe is clamped into the outer cylinder, and the other end of the connecting pipe is connected to the vacuum pipe;

[0030] The reset spring is located in the outer cylinder and is sleeved on the batch head member, one end of the reset spring abuts against the connecting pipe, and the other end of the reset spring abuts against the inner cylinder; the reset spring applies an acting force to the inner cylinder to enable the inner cylinder to be in the first position, and the limiting pin abuts against the end of the limiting groove.

[0031] In some embodiments, the tightening device further comprises a storage rack, a plurality of fixing positions for placing batch head units are arranged on the storage rack, and a buffer pad is arranged on each fixing position.

[0032] Compared with the prior art, the embodiments of the utility model have the beneficial effects that:

[0033] In the quick-change module, the movable cylinder can drive the first locking member to move synchronously in the axial direction of the movable cylinder, and the first locking member moves in the radial direction of the movable cylinder under the action of the limiting member to lock or release the batch head unit, so that the batch head unit can move upward during the locking process, the batch head unit can be tightly attached to the flared opening of the main body, the vacuum property is improved, the stability of the batch head unit is improved, and the batch head unit can be effectively centered.

[0034] It should be understood that the foregoing general description and the following detailed description are only exemplary and illustrative, but not for limiting the utility model.

[0035] The foregoing general description and the following detailed description of various implementations or examples of the technology described in the utility model are not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0036] In the drawings, which are not necessarily drawn to scale, like numerals describe similar components throughout the several views. The drawings illustrate various embodiments in accordance with the present application(s) by way of example and not by way of limitation. Like reference numerals refer to similar parts throughout the several views of the drawings, as described throughout this application and in accordance with common practice.

[0037] Figure 1 A sectional view of the quick-change module locking bit head unit of the embodiment of the present application;

[0038] Figure 2 A sectional view of the quick-change module releasing bit head unit of the embodiment of the present application;

[0039] Figure 3 A perspective structural schematic view of the quick-change module of the embodiment of the present application;

[0040] Figure 4 A perspective structural schematic view of the movable cylinder of the embodiment of the present application;

[0041] Figure 5 A half sectional view of the limiting piece of the embodiment of the present application;

[0042] Figure 6 A half sectional view of the upper cover of the embodiment of the present application;

[0043] Figure 7 A half sectional view of the main cylinder of the embodiment of the present application;

[0044] Figure 8 A perspective structural schematic view of the tightening device of the embodiment of the present application;

[0045] Figure 9 A sectional view of the bit head unit of the embodiment of the present application when the bit head piece is in the first position;

[0046] Figure 10 A sectional view of the bit head unit of the embodiment of the present application when the bit head piece is in the second position;

[0047] Figure 11 A perspective structural schematic view of the inner cylinder of the embodiment of the present application;

[0048] Figure 12 A perspective structural schematic view of the bit head piece of the embodiment of the present application;

[0049] Figure 13 A half sectional view of the outer cylinder of the embodiment of the present application;

[0050] Figure 14 A perspective structural schematic view of the storage rack of the embodiment of the present application;

[0051] Figure 15 It is a three-dimensional structure schematic view of the quick-change stroke module.

[0052] In the figure,

[0053] 100, main body; 1000, main cylinder; 1001, upper cover; 1002, bottom cover; 1003, first interface; 1004, second interface; 1005, vacuum interface; 1006, mounting hole; 1007, vacuum channel; 1008, protruding part; 1009, first sealing groove; 101, inner cavity; 102, cylindrical part; 103, sealing cavity; 104, horn mouth; 105, first sealing ring; 106, second sealing ring; 107, third sealing ring; 108, needle bearing;

[0054] 200, movable cylinder; 201, head; 202, second sealing groove; 203, first lock hole;

[0055] 300, first locking part;

[0056] 400, limiting part; 401, first annular surface; 402, second annular surface; 403, third annular surface;

[0057] 500, bit unit; 5000, outer cylinder; 5001, inner cylinder; 5002, vacuum pipe; 5003, connecting pipe; 5004, bit part; 5005, second locking part; 5006, return spring; 5007, limiting pin; 5008, induction ring; 5009, air groove; 5010, second lock hole; 5011, limiting groove; 5012, first annular groove; 5013, lock groove; 5014, second annular groove; 5015, suction port;

[0058] 600, tightening unit; 601, transmission shaft;

[0059] 700, storage rack; 701, first side plate; 702, second side plate; 703, bottom plate; 704, positioning hole; 705, top plate;

[0060] 800, quick-change stroke module; 801, air cylinder; 802, linear guide rail; 803, mounting block. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme of the utility model embodiment will be described clearly and completely below by combining the drawings of the utility model embodiment. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0062] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meaning as understood by a person of ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms used in the present application do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "comprise", "comprising", and similar terms mean that the elements or objects before the word encompass the elements or objects listed after the word, and equivalents thereof, and do not exclude other elements or objects. The terms "connected" or "coupled" and similar terms do not mean only physical or mechanical connections or couplings, but can include electrical connections or couplings, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0063] In order to keep the following description of the embodiments of the present application clear and concise, detailed descriptions of known functions and known components are omitted.

[0064] The embodiments of the present application provide a quick-change module for connecting a tightening device, which at least includes a tightening unit 600 and a chuck unit 500.

[0065] The embodiments of the present application provide a quick-change module for connecting a tightening device, which at least includes a tightening unit 600 and a chuck unit 500.

[0066] As shown in Figure 1 and As shown in Figure 2 The quick-change module of the present embodiment at least includes a main body 100, a movable cylinder 200, a plurality of first locking members 300, and a limiting member 400.

[0067] The main body 100 has an inner cavity 101, and the top of the main body 100 is used for connecting the tightening unit 600, and the bottom of the main body 100 is provided with a trumpet mouth 104 in communication with the inner cavity 101.

[0068] The movable cylinder 200 is movably arranged in the inner cavity 101 and coaxially arranged with the trumpet mouth 104, and the chuck unit 500 can pass through the trumpet mouth 104 on the main body 100 to extend into the movable cylinder 200 to be connected with the tightening unit 600.

[0069] The movable cylinder 200 can move along the axis direction of the trumpet mouth 104 relative to the main body 100.

[0070] The plurality of first locking members 300 are respectively arranged on the movable cylinder 200 and can move synchronously with the movable cylinder 200.

[0071] The limiting member 400 is fixed in the inner cavity 101 and is arranged around the movable cylinder 200. During the movement of the movable cylinder 200 in the first direction, the limiting member 400 can exert an external force on the plurality of first locking members 300 to move each first locking member 300 in the direction close to the axis of the movable cylinder 200 to be clamped into the locking slot 5013 of the bit unit 500 and lock the bit unit 500, as shown in Figure 2 During the movement of the movable cylinder 200 in the second direction, the limiting member 400 can remove the exerted external force to move each first locking member 300 in the direction away from the axis of the movable cylinder 200 to be released from the locking slot 5013 of the bit unit 500 and release the bit unit 500, as shown in Figure 1 .

[0072] Wherein, locking the bit unit 500 can be understood as fixing the bit unit 500 on the quick-change die set; releasing the bit unit 500 can be understood as the bit unit 500 can be removed from the quick-change die set.

[0073] In addition, when the main body member 100 is vertically placed, the movement of the movable cylinder 200 in the first direction can be understood as upward movement, and the movement of the movable cylinder 200 in the second direction can be understood as downward movement. The first direction is upward and the second direction is downward in this embodiment.

[0074] In the quick-change die set of this embodiment, the movable cylinder 200 can drive the first locking member 300 to move synchronously during the movement of the movable cylinder 200 in the axial direction, and under the action of the limiting member 400, the first locking member 300 moves in the radial direction of the movable cylinder 200 to lock or release the bit unit 500, so that the bit unit 500 can have an upward movement during the locking process, and the bit unit 500 can be firmly attached to the flared mouth 104 of the main body member 100, which not only increases the stability of the bit unit 500, but also effectively centers the bit unit 500.

[0075] As shown in Figure 1 , Figure 2 and Figure 3 , in some embodiments, the main body member 100 has a sealed cavity 103 independent of the inner cavity 101, and at least part of the movable cylinder 200 extends into the sealed cavity 103.

[0076] The main body member 100 is provided with a first interface 1003 and a second interface 1004 which respectively communicate with the sealed cavity 103.

[0077] The medium can be introduced into the sealed cavity 103 through one of the interfaces, and discharged through the other interface, so as to push the movable cylinder 200 to move in the first direction or the second direction by the medium in the sealed cavity 103.

[0078] In some embodiments, the first interface 1003 can be in communication with one end of the sealed cavity 103, and the second interface 1004 can be in communication with the other end of the sealed cavity 103, and the movable cylinder 200 can move back and forth between the two ends of the sealed cavity 103.

[0079] When the medium is introduced into the sealed cavity 103 through the first interface 1003, the medium can apply an upward pushing force to the bottom of the part of the movable cylinder 200 that extends into the sealed cavity 103, thereby moving the movable cylinder 200 in a first direction (downward), while the medium is discharged from the second interface 1004. When the medium is introduced into the sealed cavity 103 through the second interface 1004, the medium can apply a downward pushing force to the top of the part of the movable cylinder 200 that extends into the sealed cavity 103, thereby moving the movable cylinder 200 in a second direction (upward), while the medium is discharged from the first interface 1003. This structure can ensure efficient and reliable movement of the movable cylinder 200.

[0080] The medium introduced into the sealed cavity 103 can be a gaseous medium or a liquid medium, and the present application does not make specific limitations, and the liquid medium is preferred.

[0081] As shown in Figure 1 , Figure 2 and Figure 4 , in some embodiments, the top of the main body has a cylindrical part 102 extending into the inner cavity 101, and the outer peripheral wall of the cylindrical part 102 and the inner wall of the inner cavity 101 define an annular space.

[0082] The end of the movable cylinder 200 away from the trumpet mouth 104 has a head 201 extending into the annular space, and the outer peripheral wall of the movable cylinder 200 and the inner peripheral wall of the inner cavity 101 are provided with a first sealing ring 105, and the outer peripheral wall of the cylindrical part 102 and the outer peripheral wall of the movable cylinder 200 are provided with a second sealing ring 107. The annular space can form a sealed cavity 103 through the first sealing ring 105 and the second sealing ring 107. The medium entering the sealed cavity 103 can apply a pushing force to the head 201 of the movable cylinder 200, thereby driving the movable cylinder 200 to move between the first position and the second position. In addition, the head 201 of the movable cylinder 200 and the inner peripheral wall of the inner cavity 101 are further provided with a third sealing ring 106, so that the head 201 of the movable cylinder 200 forms a piston structure, and the sealed cavity 103 forms a cylinder structure.

[0083] In some embodiments, the head 201 of the movable cylinder 200 can be provided with a second sealing groove 202 for installing the third sealing ring 106.

[0084] As shown in Figure 1 , Figure 2 , Figure 4 andFigure 5 As shown, in some embodiments, the first locking member 300 is a steel ball structure, and the movable cylinder 200 is provided with a first lock hole 203 matched with the plurality of first locking members 300 one by one, and the first locking member 300 is clamped in the first lock hole 203.

[0085] The limiting member 400 is a cylindrical structure or a ring structure, the inner diameter of the limiting member 400 is greater than the outer diameter of the movable cylinder 200, and the inner diameter of the limiting member 400 gradually decreases in the direction away from the trumpet mouth 104, so that in the process of moving the movable cylinder 200 upward, the inner wall surface of the limiting member 400 can abut against the first limiting member 400 to apply an external force to push the first locking member 300 to move in the direction close to the axis of the movable cylinder 200. When the movable cylinder 200 moves downward, the first limiting member 400 has a degree of freedom in the radial direction of the movable cylinder 200 because the inner diameter of the limiting member 400 gradually increases, at this time, the first limiting member 400 can be clamped out of the lock slot 5013, so that the bit unit 500 can be removed from the quick-change die assembly.

[0086] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 , in some embodiments, the inner wall surface of the limiting member 400 has a first annular surface 401, a second annular surface 402 and a third annular surface 403 in sequence in the direction away from the trumpet mouth 104.

[0087] The radial distance between the first annular surface 401, the second annular surface 402 and the third annular surface 403 of the limiting member 400 and the outer peripheral wall of the movable cylinder 200 gradually decreases.

[0088] When the movable cylinder 200 is in the initial position, the first locking member 300 is opposite to the first annular surface 401, at this time, the first locking member 300 has a degree of freedom in the radial direction of the movable cylinder 200, and the first locking member 300 is not clamped into the lock slot 5013 of the bit unit 500, and when the movable cylinder 200 moves upward, the first locking member 300 abuts against the second annular surface 402 and the third annular surface 403 in sequence, the two annular surfaces can push the first locking member 300 to move in the direction close to the axis of the movable cylinder 200, so as to be clamped in the locking slot of the bit unit 500.

[0089] In some embodiments, the first lock hole 203 on the movable cylinder 200 is located at one end close to the trumpet mouth 104, and a plurality of first lock holes 203 are arranged around the circumference of the movable cylinder 200. Each first lock hole 203 corresponds to a first locking member 300, and the plurality of first locking members 300 collectively lock the bit unit 500, which can ensure the stability of the bit unit 500.

[0090] The first locking member 300 of the embodiment can also have other shapes, and is not limited in particular. The shape can be determined according to the fitting mode of the locking groove 5013 of the bit unit 500.

[0091] As shown in Figure 3 , Figure 6 and Figure 7 , in some embodiments, the main body member 100 includes a main cylinder 1000, an upper cover 1001, and a bottom cover 1002. The main cylinder 1000 has open ends, the upper cover 1001 is used to cover the top open end of the main cylinder 1000, and the bottom cover 1002 is used to cover the bottom open end of the main cylinder 1000. The inner circumferential wall of the main cylinder 1000 forms the inner circumferential wall of the inner cavity 101. The cylindrical portion 102 on the main body member 100 is arranged on the upper cover 1001, and the trumpet mouth 104 is arranged on the bottom cover 1002.

[0092] Further, the inner circumferential wall of the main cylinder 1000 is provided with an annular protruding portion 1008, the limiting member 400 is located between the protruding portion 1008 and the bottom cover 1002 of the main body member 100 in the inner cavity 101, and the two ends of the limiting member 400 are correspondingly clamped on the protruding portion 1008 and the bottom cover 1002, so as to fix the limiting member 400 and limit the synchronous movement of the limiting member 400 with the movable cylinder 200.

[0093] In some embodiments, the outer circumferential wall of the protruding portion 1008 and the cylindrical portion 102 of the main cylinder 1000 is respectively provided with a first sealing groove 1009 for mounting the first sealing ring 105 or the second sealing ring 107, so as to facilitate the fixation of the sealing ring.

[0094] As shown in Figure 1 , Figure 2 and 6 , in some embodiments, the upper cover 1001 of the main body member 100 is provided with a mounting hole 1006 penetrating through the upper and lower ends thereof, the tightening unit 600 can be fixed in the mounting hole 1006, the mounting hole 1006 can be coaxial with the movable cylinder 200, and the upper cover 1001 is further provided with a vacuum interface 1005 in communication with the mounting hole 1006 through a vacuum passage 1007. The vacuum interface 1005 can be connected to a vacuumizing device or other corresponding device, so as to vacuumize the inside of the bit unit 500, so as to realize the adsorption of the bit unit 500 to screws or the like.

[0095] A needle bearing 108 can be mounted in the mounting hole 1006, the needle bearing 108 can be sleeved on the transmission shaft 601 on the tightening unit 600, the transmission shaft 601 on the tightening unit 600 is used for the connection of the bit member 5004 in the bit unit 500, and the rotation of the transmission shaft 601 drives the rotation of the bit member 5004. The needle bearing 108 can realize the radial and axial movement of the transmission shaft 601, so that the transmission shaft 601 and the bit member 5004 can be well connected.

[0096] As Figure 8 shown, in some embodiments, the utility model embodiments also provide a tightening device, which comprises the quick-change module, the tightening unit 600 and the bit unit 500 according to any one of the above embodiments.

[0097] The tightening unit 600 is connected to the top of the main body 100 in the quick-change module, and the tightening unit 600 comprises a driving shaft and a transmission shaft 601 connected to the driving shaft.

[0098] The bit unit 500 comprises a sleeve assembly and a bit 5004 penetrating the sleeve assembly, and the bit 5004 can rotate around the axis of the sleeve assembly.

[0099] The outer peripheral wall of the sleeve assembly is provided with a locking groove 5013, and when the bit unit 500 is inserted into the movable cylinder 200, moving the movable cylinder 200 in the quick-change module can make the first locking member 300 be clamped in the locking groove 5013 of the bit unit 500. The bit 5004 is used to be connected with the transmission shaft, and the tightening unit 600 is used to drive the bit 5004 to rotate through the transmission shaft.

[0100] As Figure 9 and Figure 10 shown, in some embodiments, the sleeve assembly of the bit unit 500 comprises an outer cylinder 5000, an inner cylinder 5001, a vacuum tube 5002 and a locking release mechanism.

[0101] The inner cylinder 5001 is located inside the outer cylinder 5000, the vacuum tube 5002 is connected with the outer cylinder 5000, one end of the bit 5004 penetrates the inner cylinder 5001 and the vacuum tube 5002 in sequence, and the other end extends out of the inner cylinder 5001 and is used to be connected with the transmission shaft of the tightening unit 600. The bottom of the vacuum tube 5002 forms a suction port 5015 matched with a fastener such as a screw.

[0102] The inner cylinder 5001 can move along the axial direction of the outer cylinder 5000 and has a first position and a second position in the moving direction. When the inner cylinder 5001 is at the first position, the locking release mechanism cooperates with the bit 5004 to lock the bit 5004, so as to limit the bit 5004 from being pulled out of the inner cylinder 5001, as shown in Figure 9 When the inner cylinder 5001 is at the second position, the locking release mechanism is separated from the bit 5004 to release the bit 5004, so that the bit 5004 can be pulled out of the inner cylinder 5001, as shown in Figure 10 The locking release mechanism can facilitate replacement of the bit 5004.

[0103] In the embodiment, the locking slot 5013 for cooperating with the first locking member 300 is arranged on the outer cylinder 5000, and the outer cylinder 5000 can further be provided with an inclined surface opposite to the horn opening 104 on the main body 100. When the first locking member 300 is clamped into the locking slot 5013, the inclined surface on the first locking member 300 tightly abuts against the horn opening 104.

[0104] As shown in Figure 9 to Figure 13 , in some embodiments, the outer peripheral wall of the batch head member 5004 is provided with a first annular groove 5012. The locking and releasing mechanism on the sleeve assembly includes a second annular groove 5014 arranged on the inner peripheral wall of the outer cylinder 5000, a second locking hole 5010 arranged on the inner cylinder 5001, and a second locking member 5005 clamped in the second locking hole 5010.

[0105] The axial distance of the second locking hole 5010 is smaller than the outer diameter of the second locking member 5005. The part of the second locking member 5005 extending into the inner cylinder 5001 is clamped in the first annular groove 5012 on the batch head member 5004. When the inner cylinder 5001 is in the first position, the second locking member 5005 is out of position with the second annular groove 5014. At this time, the second locking member 5005 cannot move radially, so it is always clamped in the first annular groove 5012 of the batch head member 5004, thereby limiting the batch head member 5004 from being pulled out of the inner cylinder 5001, as shown in Figure 9 . When the inner cylinder 5001 is in the second position, the second locking member 5005 is opposite to the second annular groove 5014. At this time, the second locking member 5005 has freedom in the radial direction of the inner cylinder 5001, that is, the second locking member 5005 can move in the radial direction of the inner cylinder 5001. At this time, a pulling force is applied to the batch head member 5004, and the batch head member 5004 can push the second locking member 5005 to clamp it into the second annular groove 5014, thereby realizing the batch head member 5004 being pulled out of the inner cylinder 5001, as shown in Figure 9 .

[0106] As shown in Figure 9 , Figure 10 and Figure 11 , in some embodiments, the outer peripheral wall of the inner cylinder 5001 is further provided with a limiting groove 5011, and the extending direction of the limiting groove 5011 is consistent with the axial direction of the inner cylinder 5001. The outer cylinder 5000 is provided with a limiting pin 5007 extending into the limiting groove 5011.

[0107] The sleeve assembly further includes a connecting pipe 5003 and a reset spring 5006. One end of the connecting pipe 5003 is clamped into the outer cylinder 5000, and the other end is connected to the vacuum pipe 5002. The reset spring 5006 is located in the outer cylinder 5000 and is sleeved on the batch head member 5004. One end of the reset spring 5006 abuts against the connecting pipe 5003, and the other end abuts against the inner cylinder 5001.

[0108] Further, the reset spring 5006 of the present embodiment is always in a compressed state and exerts an upward force on the inner cylinder 5001 to keep the inner cylinder 5001 in the first position. At the same time, the bottom end of the limiting groove 5011 is in contact with the limiting pin 5007, thereby limiting the inner cylinder 5001 from being pulled out of the outer cylinder 5000. When the inner cylinder 5001 is pressed downward, the inner cylinder 5001 continues to compress the reset spring 5006 until the inner cylinder 5001 moves to the second position, at which time the top end of the limiting groove 5011 is in contact with the limiting pin 5007, thereby limiting the inner cylinder 5001 from moving downward.

[0109] As shown in FIG. 6, in some embodiments, the outer peripheral wall of the inner cylinder 5001 is provided with a spline, and a gas groove 5009 is formed on the spline. The gas groove 5009 can be in communication with the mounting hole 1006 of the upper cover 1001, and the vacuum tube 5002 and the mounting hole 1006 are in communication through the gas groove 5009, so that the screw can be conveniently adsorbed through the vacuum tube 5002. Figure 8 to Figure 10 As shown in FIG. 6, in some embodiments, the tightening device further comprises a storage rack 700, which is provided with a plurality of positioning holes 704 and a sensor (not shown in the figure) corresponding to each positioning hole 704. The sensor can be used to determine whether the positioning hole 704 is placed in the positioning hole 704.

[0110] Figure 14 As shown in FIG. 6, in some embodiments, the storage rack 700 comprises a bottom plate 703, a first side plate 701, a second side plate 702 and a top plate 705. The first side plate 701 is two and is fixed on the bottom plate 703 and is oppositely arranged, the second side plate 702 is two and is connected to the two first side plates 701, and the top plate 705 is connected to the top of the first side plate 701.

[0111] Further, the positioning hole 704 is arranged in the top plate 705, and the bit unit 500 can be vertically inserted into the positioning hole 704, thereby ensuring the stability of the bit unit 500 on the storage rack 700, and the first side plate 701 and the second side plate 702 can protect the bit unit 500.

[0112] Further, the positioning hole 704 is arranged in the top plate 705, and the bit unit 500 can be vertically inserted into the positioning hole 704, thereby ensuring the stability of the bit unit 500 on the storage rack 700, and the first side plate 701 and the second side plate 702 can protect the bit unit 500.

[0113] In some embodiments, the sensor can be fixed on the second side plate 702 or the first side plate 701, and each positioning hole 704 corresponds to one sensor.

[0114] In some embodiments, an annular buffer sleeve can be mounted on each positioning hole 704. The buffer sleeve can be made of flexible materials such as plastic, and the buffer sleeve can play a buffering role when the bit unit 500 is placed in the positioning hole 704, thereby effectively reducing noise.

[0115] As shown in FIG. 6, in some embodiments, the tightening device further comprises a storage rack 700, which is provided with a plurality of positioning holes 704 and a sensor (not shown in the figure) corresponding to each positioning hole 704. The sensor can be used to determine whether the positioning hole 704 is placed in the positioning hole 704. Figure 10 ​As shown, in some embodiments, the bottom of the outer casing of the bit unit 500 is provided with a sensing ring 5008, and the sensor on the storage rack 700 can determine the model of the bit unit 500 by the position of the sensing ring 5008.

[0116] like Figure 1 and Figure 2 As shown, in some embodiments, a spring is provided between the drive shaft 601 and the drive shaft in the tightening unit 600. The drive shaft 601 can move along the axial direction of the drive shaft to compress or release the spring. The end of the drive shaft 601 is provided with a groove, and the end of the bit 5004 can be stuck in the groove to realize the connection between the bit 5004 and the drive shaft. The spring can prevent the bit 5004 from making hard contact with the drive shaft.

[0117] like Figure 15 As shown, in some embodiments, the tightening device further includes a quick-change stroke module 800, which includes a base plate and a linear guide rail 802 and a cylinder 801 respectively mounted on the base plate. A mounting block 803 is provided on the linear guide rail 802.

[0118] The mounting block 803 can be connected to the main body 100 on the quick-change module, and the piston rod of the cylinder 801 can be connected to the mounting block 803. The extension and retraction of the cylinder 801 can drive the main body 100 to slide along the linear guide rail 802.

[0119] The base plate can be connected to a robotic arm device, which can move the entire quick-change module to a position directly above a certain annotation component on the storage rack 700. Then, by controlling the extension and retraction of the cylinder 801, the quick-change module can be connected to and disconnected from the bit assembly.

[0120] The above description is intended to be illustrative and not restrictive. Those skilled in the art can make variations, modifications, substitutions, and alterations to the above embodiments within the scope of this disclosure. Moreover, the above examples (or one or more of them) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A quick change die set for use in a screwing device, said screwing device comprising at least a screwing unit and a chuck unit, said chuck unit having a locking groove, characterized in that, The quick-change die assembly comprises: a main body having an inner cavity, a top of the main body being configured to connect a screwing unit, and a bottom of the main body being provided with a trumpet mouth communicating with the inner cavity; a movable cylinder movably arranged in the inner cavity and coaxial with the trumpet mouth, the movable cylinder being capable of moving along the axial direction of the trumpet mouth relative to the main body; a plurality of first locking members respectively arranged on the movable cylinder and capable of moving synchronously with the movable cylinder; a limiting member fixed in the inner cavity and arranged around the movable cylinder, the limiting member being capable of exerting an external force on the plurality of first locking members to move each first locking member along the axial direction close to the movable cylinder to be clamped into a locking slot of a chuck unit and lock the chuck unit during movement of the movable cylinder in a first direction, and the limiting member being capable of removing the external force to move each first locking member along the axial direction away from the movable cylinder to be released from the locking slot of the chuck unit and release the chuck unit during movement of the movable cylinder in a second direction.

2. The quick change die set of claim 1, wherein, The main body has a sealed cavity independent of the inner cavity, and at least a part of the movable cylinder extends into the sealed cavity; The main body is provided with a first interface and a second interface respectively communicating with the sealed cavity, and a medium can be introduced into the sealed cavity through one of the interfaces and discharged through the other interface to push the movable cylinder to move in the first direction or the second direction by the medium.

3. The quick change die set of claim 2, wherein, The top of the main body has a cylindrical portion extending into the inner cavity, an annular space is defined between the outer peripheral wall of the cylindrical portion and the inner peripheral wall of the inner cavity, and the end of the movable cylinder away from the trumpet mouth has a head portion extending into the annular space; Sealing rings are arranged between the outer peripheral wall of the cylindrical portion and the inner peripheral wall of the movable cylinder and between the inner peripheral wall of the inner cavity and the outer peripheral wall of the movable cylinder, respectively, so that the annular space forms the sealed cavity, and the medium introduced into the sealed cavity can act on the head portion to push the movable cylinder to move.

4. The quick change die set of claim 3, wherein, The main body comprises a main cylinder, an upper cover and a bottom cover, the upper cover is used to cover the top open end of the main cylinder, and the bottom cover is used to cover the bottom open end of the main cylinder; the cylindrical portion is arranged on the upper cover, and the trumpet mouth is arranged on the bottom cover; The inner peripheral wall of the main cylinder is provided with an annular protruding portion, the limiting member is located between the protruding portion and the bottom cover of the main body, and the two ends of the limiting member are clamped on the protruding portion and the bottom cover, respectively.

5. The quick change die set of claim 1 wherein, The first locking member is a steel ball, the movable cylinder is provided with a first locking hole matched with the plurality of first locking members one by one, the first locking member is clamped in the first locking hole, the limiting member is in a cylindrical structure, and the inner diameter of the limiting member gradually decreases in the direction away from the trumpet mouth, so that the inner wall surface of the limiting member can abut against the first locking member to exert an external force to push the first locking member to move along the axial direction close to the movable cylinder during movement of the movable cylinder in the first direction.

6. A tightening device, characterized in that The quick-change die assembly comprises: the quick-change die assembly according to any one of claims 1-5. The tightening unit is connected to the top of the main body of the quick-change die set, and comprises a driving shaft and a transmission shaft connected to the driving shaft; The chuck unit comprises a sleeve assembly and a chuck member arranged in the sleeve assembly, the chuck member is capable of rotating around the axis of the sleeve assembly, and the outer peripheral wall of the sleeve assembly is provided with a locking groove, and the chuck member is used to be connected to the transmission shaft.

7. A tightening device as claimed in claim 6, characterized in that The sleeve assembly comprises an outer cylinder, an inner cylinder, a vacuum tube and a locking and releasing mechanism; The inner cylinder is arranged in the inner part of the outer cylinder, the vacuum tube is connected to the outer cylinder, one end of the chuck member is used to be connected to the transmission shaft of the tightening unit, and the other end extends into the inner cylinder and the vacuum tube; The inner cylinder is capable of moving along the axial direction of the outer cylinder, and has a first position and a second position in the moving direction; When the inner cylinder is located at the first position, the locking and releasing mechanism cooperates with the chuck member to lock the chuck member and restrict the chuck member from being pulled out of the inner cylinder; When the inner cylinder is located at the second position, the locking and releasing mechanism is separated from the chuck member to release the chuck member and enable the chuck member to be pulled out of the inner cylinder.

8. A tightening device as claimed in claim 7, characterized in that The outer peripheral wall of the chuck member is provided with a first annular groove; The locking and releasing mechanism comprises a second annular groove arranged on the inner peripheral wall of the outer cylinder, a second locking hole arranged on the inner cylinder and a second locking member clamped in the second locking hole; When the inner cylinder is located at the first position, the second locking member is misaligned with the second annular groove, and at least part of the second locking member is clamped in the first annular groove; when the inner cylinder is located at the second position, the second locking member is opposite to the second annular groove, and an external force applied to the chuck member can push at least part of the second locking member to be clamped in the second annular groove, and enable the chuck member to be pulled out of the inner cylinder.

9. A tightening device as claimed in claim 7, characterized in that The outer peripheral wall of the inner cylinder is provided with a limiting groove, the extending direction of the limiting groove is consistent with the axial direction of the inner cylinder, and the outer cylinder is provided with a limiting pin extending into the limiting groove; The sleeve assembly further comprises a connecting tube and a reset spring, one end of the connecting tube is clamped into the outer cylinder, and the other end is connected to the vacuum tube; The reset spring is located in the outer cylinder and is sleeved on the chuck member, one end of the reset spring abuts against the connecting tube, and the other end abuts against the inner cylinder, the reset spring applies an acting force to the inner cylinder to enable the inner cylinder to be located at the first position, and the limiting pin abuts against the end part of the limiting groove.

10. A tightening device as claimed in claim 6, characterized in that The tightening device further comprises a storage rack, the storage rack is provided with a plurality of fixing positions for placing the chuck unit, and each fixing position is provided with a buffer pad.

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