Rotary locking device for annular workpiece and locking method of rotary locking device

Abstract

According to the rotary locking device and method for the annular workpiece, the annular workpiece comprises an annular workpiece body and a plurality of screw holes circumferentially distributed in the annular workpiece body, the rotary locking device comprises a base, a tray, a jacking mechanism, a positioning mechanism and a locking mechanism, and the tray is movably arranged on the base and used for containing the annular workpiece; the jacking mechanism is arranged on the base and located below the tray so that the annular workpiece can be jacked to the locking position. The positioning mechanism is arranged on the base and located above the tray so as to position the annular workpiece. And the locking mechanism is arranged on the mechanism, is used for locking screw holes of the annular workpieces and comprises a locking seat arranged on the base, two locking guns which are arranged on the locking seat in a manner of moving towards each other or away from each other, and a first moving mechanism which is arranged on the locking seat, is connected with the two locking guns and is used for driving the two locking guns to move. And a plurality of screw holes in the annular workpiece can be locked, the structure of the device is simplified, and the whole device is easy to maintain.

Description

Technical Field

[0001] The invention belongs to the technical field of workpiece assembly, and in particular relates to a rotation locking device for an annular workpiece and a locking method thereof. Background Art

[0002] In modern industry, metal materials are widely used in many fields such as machinery manufacturing, aerospace, shipbuilding, etc. Round metal workpieces are one type of metal components, such as gear plates, flange end plates, etc.

[0003] In the prior art, annular workpieces are usually fixed and installed with bolts during the installation process. Manual installation is mostly adopted during the installation process, or electric or pneumatic bolt locking guns are used to lock them one by one. This installation method requires assembly one by one, which is time-consuming and has low assembly efficiency. When locking them one by one, it is easy to cause different locking tightness of the bolts. In addition, when the bolts are tightened, uneven force may cause the bolts to fly up and cause accidents. Alternatively, the tightening gun is made into a circular moving part, and the screw locking is achieved by rotating the tightening gun. The problem brought about by this is that the overall rotating part is large, the structural layout is cramped, and it is not convenient for later repair and maintenance, which urgently needs to be improved. Summary of the invention

[0004] The object of the present invention is to overcome the disadvantages of the prior art and provide a rotation locking device for a reversing workpiece and a locking method thereof.

[0005] The present invention adopts the following technical solution:

[0006] A rotary locking device for an annular workpiece, the annular workpiece comprises an annular workpiece body and a plurality of screw holes circumferentially distributed on the annular workpiece body, the rotary locking device comprises a base, a tray, a lifting mechanism, a positioning mechanism and a locking mechanism,

[0007] A tray is movably arranged on the base and is used for placing the annular workpiece;

[0008] The lifting mechanism is arranged on the base and is located below the tray, and includes a lifting platform arranged on the base, a lifting seat which can be lifted and lowered on the lifting platform, a lifting rod arranged on the lifting seat which can lift the annular workpiece on the tray upward, a lifting assembly arranged on the lifting platform which drives the lifting seat to move up and down, a rotating assembly arranged on the lifting seat which is connected to and drives the lifting rod to rotate, a supporting seat which can move back and forth relative to the lifting seat and is supported at the bottom of the lifting seat, and a driving assembly arranged on the lifting platform which is connected to and drives the supporting seat to move;

[0009] The positioning mechanism is arranged on the base and located above the tray, including a positioning frame, a positioning plate arranged on the positioning frame and relative to the annular workpiece, a limiting assembly relatively arranged at the bottom of the positioning plate to limit the locking position of the annular workpiece, and a locking hole arranged on the positioning plate and capable of being opposite to two relatively arranged screw holes, wherein the limiting assembly includes two limiting seats relatively arranged at the bottom of the positioning plate, two limiting rods relatively arranged on the two limiting seats, and two elastic limiting pins respectively arranged in the two limiting rods; the locking hole includes a locking hole body arranged in the middle of the positioning plate and two locking grooves relatively arranged at both sides of the locking hole body and extending outwards and capable of being opposite to the two relatively arranged screw holes;

[0010] The locking mechanism includes a locking seat arranged on a base, two locking guns arranged on the locking seat and movable toward or away from each other, a first moving mechanism arranged on the locking seat and connected to and driving the two locking guns to move, a second moving mechanism arranged on the base and connected to and driving the locking seat to move up and down, and a third moving mechanism arranged on the base and connected to and driving the locking seat to move left and right. The lower ends of the two locking guns are respectively opposite to the two locking grooves to cooperate with the second moving mechanism and move downward to lock the screws in the corresponding screw holes.

[0011] Preferably, the rotating assembly includes a rotating motor arranged on the lifting seat, a rotating gear connected to the output shaft of the rotating motor, and a driven gear arranged at the bottom of the lifting rod and matched with the rotating gear.

[0012] Preferably, the annular workpiece also includes a connecting rod arranged in the middle of the annular workpiece body, the lifting rod includes a lifting rod body, a lifting block arranged on the lifting rod body and supported on the bottom of the annular workpiece body, and a lifting part arranged on the top of the lifting block and connected to the connecting rod, and an arc-shaped limiting slot extending downward for the connecting rod to be embedded is formed on the upper end of the lifting part. When the lifting rod lifts the annular workpiece, the annular workpiece body is supported on the lifting block, and the connecting rod is embedded in the relative arc-shaped limiting slot, so that the annular workpiece can rotate with the lifting rod.

[0013] Preferably, the annular workpiece body is formed with a mounting groove extending downward, and the plurality of screw holes are circumferentially distributed in the mounting groove. The limit seat is provided with an arc-shaped limiting portion that can be against the upper end of the annular workpiece, and the limiting rod is arranged on the inner side of the arc-shaped limiting portion, and the lower end thereof is lower than the lower end of the arc-shaped limiting portion.

[0014] Preferably, the positioning frame is provided with a yield hole opposite to the locking hole, the positioning plate is fixed to the bottom surface of the positioning frame by a quick locking mechanism, the positioning plate includes two quick locking holes diagonally arranged on the positioning plate and two positioning holes diagonally arranged, and the positioning frame is provided with two positioning rods that can be embedded in the relative positioning holes.

[0015] Preferably, the lifting assembly includes two lifting plates relatively arranged on both sides of the lifting seat, two lifting cylinders arranged on the lifting platform and connected to the two lifting plates respectively, two guide blocks relatively arranged on both sides of the lifting seat, two guide rails arranged on the lifting platform and respectively cooperating with the two guide blocks, and a buffer block arranged on the side of a guide rail.

[0016] Preferably, the driving assembly includes a moving block movably arranged on the lifting platform, a moving cylinder arranged on the lifting platform and connected to and driving the moving block to move, a positioning groove extending inward from the side of the lifting seat along the moving direction of the moving block, a positioning seat arranged in the positioning groove, and a moving cavity arranged on the positioning seat for the moving block to move back and forth.

[0017] Preferably, the first moving mechanism includes two mounting plates arranged on the lock seat for mounting two lock guns, a bidirectional screw rotatably arranged on the lock seat, two nut seats arranged on the bidirectional screw and connected to the two mounting plates respectively, a first moving motor arranged on the lock seat and connected to and driving the bidirectional screw, two first guide rails relatively arranged on both sides of the bidirectional screw and a first guide slide relatively arranged on the mounting plate and respectively cooperating with the two first guide rails.

[0018] Preferably, the second moving mechanism includes a mounting plate arranged on the base, a lifting screw rotatably arranged on the mounting plate and extending in a vertical direction, a lifting nut seat arranged on the locking seat and cooperating with the lifting screw, two second guide rails relatively arranged on the mounting plate and located on both sides of the lifting screw, and two second guide slides respectively arranged on the locking seat and cooperating with the two second guide rails.

[0019] A method for locking an annular workpiece, based on the above-mentioned rotary locking device, specifically comprises the following steps:

[0020] In preparation for locking, the annular workpiece is placed on the pallet, and moves with the pallet to the locking position, opposite to the two locking guns. The lifting seat moves upward to drive the lifting rod to lift the annular workpiece on the pallet upward, so that the two elastic limit pins at the bottom of the positioning plate are respectively embedded in the relative screw holes to complete the positioning of the annular workpiece. At the same time, the driving assembly drives the support seat to move to the bottom of the lifting seat to complete the locking preparation of the annular workpiece;

[0021] During the locking process, the first moving mechanism drives the two locking guns to move toward or away from each other so that the lower ends of the two locking guns are respectively opposite to the two locking grooves, and the second moving mechanism drives the two locking guns to move downward through the two locking grooves and extend into the two screw holes to lock the screws in the corresponding screw holes, and then the lifting assembly drives the lifting seat to move downward to be supported on the support seat, and the second moving mechanism drives the two locking guns to reset. At this time, the annular workpiece is supported on the lifting rod and does not fall back to the pallet, and the rotating assembly drives the lifting rod to rotate so that the adjacent unreturned parts on the annular workpiece are The locked screw hole rotates to the locked position, and the lifting assembly drives the lifting seat to move upward again to make the elastic limit pin embedded in the relatively unlocked screw hole, and the second moving mechanism drives the two locking guns to move downward through the two locking grooves and extend into the two screw holes to lock the screws in the corresponding screw holes. The above operation is repeated until the locking of multiple screw holes on the annular workpiece is completed. When the screw holes corresponding to the two elastic limit pins have been locked with screws, the elastic positioning pin is compressed upward under the action of the screw, so that the front end of the limit rod is pressed against the screw for limiting;

[0022] The locking is completed. When the locking gun completes the last screw locking of the annular workpiece, the driving assembly drives the support seat to move and reset in the direction away from the lifting seat, and the lifting assembly drives the lifting seat to move downward and reset, so that the annular workpiece falls back on the pallet and moves to the next workstation with the pallet.

[0023] It can be seen from the above description of the present invention that, compared with the prior art, the beneficial effects of the present invention are as follows: the present application defines the structure of the rotary locking device, and sets a rotating component in the lifting mechanism. While realizing the lifting of the annular workpiece, it can also drive the annular workpiece to rotate, so as to lock the multiple screw holes on the annular workpiece, thereby simplifying the structure of the device, and each mechanism is independently set, which is easy to maintain as a whole, and can reduce the subsequent maintenance cost; wherein, the structure of the positioning mechanism is further defined, and a limit component is set to cooperate with the lifting mechanism. When the annular workpiece is lifted to the locking position, the positioning of the annular workpiece can be completed to ensure the stability of the annular workpiece during the locking process, thereby improving the assembly quality of the finished annular workpiece; in addition, the structure of the locking mechanism is further defined, and two locking guns cooperate with the moving mechanism to simultaneously lock the screws of the two opposite screw holes on the annular workpiece, thereby effectively improving the assembly efficiency, and further defining the structure of the first moving mechanism so that the two locking guns can move toward or away from each other at the same time to adapt to the variable-distance locking of annular workpieces of different sizes, and the overall compatibility is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a rotary locking device;

[0025] Figure 2 It is a partial structural schematic diagram of the rotary locking device;

[0026] Figure 3The structure diagram of the lifting mechanism Figure 1 ;

[0027] Figure 4 The structure diagram of the lifting mechanism Figure 2 ;

[0028] Figure 5 The structure diagram of the positioning mechanism Figure 1 ;

[0029] Figure 6 The structure diagram of the positioning mechanism Figure 2 ;

[0030] Figure 7 It is a partial structural schematic diagram of the positioning mechanism;

[0031] Figure 8 It is a structural diagram of the locking mechanism;

[0032] Fig. 9 A partial structural diagram of the locking mechanism Figure 1 ;

[0033] Fig.10 A partial structural diagram of the locking mechanism Figure 2 ;

[0034] Fig.11 Schematic diagram of the assembly of the ring-shaped workpiece and the pallet Figure 1 ;

[0035] Fig.12 Schematic diagram of the assembly of the ring-shaped workpiece and the pallet Figure 1 ;

[0036] In the figure, 1-base, 2-tray, 3-lifting mechanism, 4-positioning mechanism, 5-locking mechanism, 6-annular workpiece, 31-lifting platform, 32-lifting seat, 33-lifting rod, 331-lifting rod body, 332-lifting block, 333-lifting part, 334-arc limit slot, 34-lifting assembly, 341-lifting plate, 342-lifting cylinder, 343-guide block, 344-guide slide rail, 345-buffer block, 35-rotating assembly, 351-rotating motor, 36-support seat, 37-driving assembly, 371-moving block, 372-moving cylinder, 373-positioning groove, 374-positioning seat, 375-moving cavity, 41-positioning frame, 411-allowing hole, 412-positioning rod, 42-positioning plate, 421-quick lock Hole, 422-positioning hole, 43-limiting assembly, 431-limiting seat, 432-limiting rod, 433-elastic positioning pin, 434-arc-shaped limiting part, 44-locking hole, 441-locking hole body, 442-locking groove, 45-quick locking mechanism, 51-locking seat, 52-locking gun, 53-first moving mechanism, 531-mounting plate, 532-bidirectional screw, 533-nut seat, 534-first moving motor, 535-first guide rail, 536-first guide slide, 54-second moving mechanism, 541-mounting vertical plate, 542-lifting screw, 543 second guide slide, 544-second guide slide, 55-third moving mechanism, 61-annular workpiece body, 62-screw hole, 63-connecting rod, 64-mounting groove. DETAILED DESCRIPTION

[0037] The present invention is further described below through specific implementation modes.

[0038] Reference Figures 1 to 12 As shown, a rotary locking device for an annular workpiece includes a base 1, a tray 2, a lifting mechanism 3, a positioning mechanism 4 and a locking mechanism 5, wherein the annular workpiece 6 includes an annular workpiece body 61, a plurality of screw holes 62 circumferentially distributed on the annular workpiece body 61 and a connecting rod 63 arranged in the middle of the annular workpiece body 61. Specifically, the annular workpiece body 61 is formed with a downwardly extending mounting groove 64, and a plurality of screw holes 62 are circumferentially distributed in the mounting groove 64.

[0039] The tray 2 is movably disposed on the base 1 and is used for placing the annular workpiece 6 .

[0040] The lifting mechanism 3 is arranged on the base 1 and is located below the tray 2, and includes a lifting platform 31 arranged on the base 1, a lifting seat 32 which can be lifted and lowered on the lifting platform 31, a lifting rod 33 arranged on the lifting seat 32 and can lift the annular workpiece 6 on the tray 2 upward, a lifting component 34 arranged on the lifting platform 31 and driving the lifting seat 32 to move up and down, a rotating component 35 arranged on the lifting seat 32 and connected to and driving the lifting rod 33 to rotate, a support seat 36 supported at the bottom of the lifting seat 32 and can move back and forth relative to the lifting seat 32, and a driving component 37 arranged on the lifting platform 31 and connected to and driving the support seat 36 to move.

[0041] The lifting rod 33 includes a lifting rod body 331, a lifting block 332 arranged on the lifting rod body 311 and supported on the bottom of the annular workpiece body 61, and a lifting portion 333 arranged on the top of the lifting block 332 and connected to the connecting rod 63, wherein an arc-shaped limiting slot 334 extending downward for the connecting rod 63 to be embedded in the upper end of the lifting portion 333 is formed. When the lifting rod 33 lifts the annular workpiece 6, the annular workpiece body 61 is supported on the lifting block 332, and the connecting rod 63 is embedded in the relative arc-shaped limiting slot 334, so that the annular workpiece 6 can rotate with the lifting rod 33.

[0042] The lifting assembly 34 includes two lifting plates 341 relatively arranged on both sides of the lifting seat 32, two lifting cylinders 342 arranged on the lifting platform 31 and connected to the two lifting plates 341 respectively, two guide blocks 343 relatively arranged on both sides of the lifting seat 32, two guide slide rails 344 arranged on the lifting platform 31 and respectively cooperating with the two guide blocks 343, and a buffer block 345 arranged on the side of a guide slide rail 344, wherein the buffer block 345 is located above the lifting seat 32 to buffer the lifting seat 32 moving upward.

[0043] The rotating assembly 35 includes a rotating motor 351 arranged on the lifting seat 32, a rotating gear connected to the output shaft of the rotating motor 351, and a driven gear arranged at the bottom of the lifting rod 33 and cooperating with the rotating gear. The rotating gear is driven by the rotating motor 351 to rotate, and then the driven gear is driven to rotate, so that the lifting rod 33 rotates a certain angle, so that the screw holes 62 rotate one by one to the locking position. Among them, the transmission mode of the rotating gear and the driven gear is a commonly used structure in the transmission assembly, so it is not shown in detail in the figure.

[0044] The driving assembly 37 includes a moving block 371 movably arranged on the lifting platform 31, a moving cylinder 372 arranged on the lifting platform 31 and connected to and driving the moving block 371 to move, a positioning groove 373 extending inward from the side of the lifting seat 32 along the moving direction of the moving block 371, a positioning seat 374 arranged in the positioning groove 373 and a moving cavity 375 arranged on the positioning seat 374 for the moving block 371 to move back and forth. When working, the locking mechanism 5 completes a locking operation, and the lifting seat 32 needs to cooperate to complete a lifting activity. The lifting cylinder 342 is frequently operated. Therefore, the driving assembly 37 is arranged to drive the support seat 36 to move, and cooperate with the lifting and lowering movement of the lifting platform 31, so that during the locking process of the annular workpiece 6, when the lifting seat 32 descends, it does not need to descend to the initial position, thereby reducing the consumption of compressed air and having a significant energy-saving effect.

[0045] The positioning mechanism 4 is arranged on the base 1 and is located above the tray 2, and includes a positioning frame 41, a positioning plate 42 arranged on the positioning frame 41 and relative to the annular workpiece 6, a limiting component 43 relatively arranged at the bottom of the positioning plate 42 to limit the locking position of the annular workpiece 6, and a locking hole 44 arranged on the positioning plate 42 and opposite to the two screw holes 62 relatively arranged, wherein the locking hole 44 includes a locking hole body 441 arranged in the middle of the positioning plate 42 and two locking grooves 442 relatively arranged on both sides of the locking hole body 441 and extending outwardly and opposite to the two screw holes 62; by arranging the positioning mechanism 4 above the tray 2 and specifically defining the structure of the positioning mechanism 4, when the annular workpiece 6 rises to the locking position, the limiting component 43 can be cooperated to achieve the limiting of the annular workpiece 6, so as to ensure the stability of the annular workpiece 6 during the locking process, thereby improving the assembly quality of the finished annular workpiece 6 to meet production needs.

[0046] The positioning frame 41 is provided with a yield hole 411 opposite to the locking hole 44, wherein the positioning plate 42 is fixed to the bottom surface of the positioning frame 41 through a quick locking mechanism 45. Specifically, the positioning plate 42 includes two quick locking holes 421 and two diagonally arranged positioning holes 422 on the positioning plate 42, and the positioning frame 41 is provided with two positioning rods 412 that can be embedded in the relative positioning holes 422. Through the cooperation of the quick locking mechanism 45 and the quick locking holes 421, the positioning plate 42 can be quickly disassembled and assembled to meet the locking work of annular workpieces 6 of different sizes.

[0047] The limiting assembly 43 includes two limiting seats 431 relatively arranged at the bottom of the positioning plate 42, two limiting rods 432 relatively arranged on the two limiting seats 431 and two elastic limiting pins 433 respectively arranged in the two limiting rods 432; wherein, the limiting seat 431 is provided with an arc-shaped limiting portion 434 which can abut against the upper end of the annular workpiece 6, and the limiting rod 432 is arranged on the inner side of the arc-shaped limiting portion 434, and its lower end is lower than the lower end of the arc-shaped limiting portion 434; when the lifting seat 32 drives the annular workpiece 6 to move upward to the locking position, if the screw hole corresponding to the elastic limiting pin 433 is not locked with the screw, the lower end of the elastic positioning pin 433 can be embedded in the relative screw hole 62 to realize the positioning of the annular workpiece 6; if the relative screw hole 62 is locked with the screw, the elastic positioning pin 433 is compressed upward into the limiting rod 432 under the action of the screw, and the lower end of the limiting rod 432 abuts against the upper end of the screw to realize the positioning of the annular workpiece 6.

[0048] The locking mechanism 5 includes a locking seat 51 disposed on the base 1, two locking guns 52 disposed on the locking seat 51 and movable toward or away from each other, a first moving mechanism 53 disposed on the locking seat 51 and connected to and driving the two locking guns 52 to move, a second moving mechanism 54 disposed on the base 1 and connected to and driving the locking seat 51 to move up and down, and a third moving mechanism 55 disposed on the base 1 and connected to and driving the locking seat 51 to move left and right. The lower ends of the two locking guns 52 are respectively opposite to the two locking grooves 442 to cooperate with the second moving mechanism 5 4, move downward to lock the screw in the corresponding screw hole 62; through the two locking guns 52 cooperating with the moving mechanism, the screws of the two opposite screw holes 62 on the annular workpiece 6 can be locked at the same time, effectively improving the assembly efficiency; wherein, the third moving mechanism 55 can adopt the mode of motor cooperating with screw nut or gear rack set, which is a commonly used structure in the mechanical field, and its specific structure and working principle are not further described here; specifically, there are four locking guns 52, two in a group, to adapt to the locking requirements of different screw sizes.

[0049] The first moving mechanism 53 includes two mounting plates 531 arranged on the locking seat 51 for mounting two locking guns 52, a bidirectional screw 532 rotatably arranged on the locking seat 51, two nut seats 532 arranged on the bidirectional screw 532 and connected to the two mounting plates 531 respectively, a first moving motor 534 arranged on the locking seat 51 and connected to and driving the bidirectional screw 532, two first guide rails 535 relatively arranged on both sides of the bidirectional screw 532, and a first guide slide 536 relatively arranged on the mounting plate 531 and cooperating with the two first guide rails 535 respectively. Through the cooperation between the bidirectional screw 532 and the two nut seats 533, the two locking guns 52 can be moved toward or away from each other to meet the locking requirements of annular workpieces of different sizes.

[0050] The second moving mechanism 54 includes a mounting plate 541 arranged on the base 1, a lifting screw 542 rotatably arranged on the mounting plate 541 and extending in the vertical direction, a lifting nut seat arranged on the lock seat 51 and cooperating with the lifting screw 542, two second guide rails 543 relatively arranged on the mounting plate 541 and located on both sides of the lifting screw 542, and two second guide slides 544 respectively arranged on the lock seat 51 and cooperating with the two second guide rails 543.

[0051] A method for locking an annular workpiece 6 is provided, based on the above-mentioned rotary locking device, and specifically comprises the following steps:

[0052] In preparation for locking, the annular workpiece 6 is placed on the tray 2, and moves to the locking position with the tray 2, opposite to the two locking guns 52. The lifting seat 32 drives the lifting rod 33 to move upward so that the annular workpiece body 61 is supported on the lifting block 332, and the connecting rod 63 is embedded in the relative arc-shaped limiting slot 334 to lift the annular workpiece 6 on the tray 2 upward, so that the two elastic limiting pins 433 at the bottom of the positioning plate 42 are respectively embedded in the relative screw holes 62 to complete the positioning of the annular workpiece 6. At the same time, the driving assembly 37 drives the supporting seat 36 to move to the bottom of the lifting seat 32 to complete the locking preparation of the annular workpiece 6.

[0053] During the locking process, the first moving mechanism 53 drives the two locking guns 52 to move toward or away from each other so that the lower ends of the two locking guns are respectively opposite to the two locking grooves 442, and the second moving mechanism 54 drives the two locking guns 52 to move downward through the two locking grooves 442 and extend into the two screw holes 62 to lock the screws in the corresponding screw holes 62, and then the lifting assembly 34 drives the lifting seat to move downward until it is supported on the support seat 36, and the second moving mechanism 54 drives the two locking guns 52 to reset. At this time, the annular workpiece 6 is supported on the lifting rod 33 and has not fallen back onto the tray 2, and the rotating assembly 35 drives the lifting rod 33 to rotate so that the adjacent ones on the annular workpiece 6 The unlocked screw hole rotates to the locked position, and the lifting assembly 34 drives the lifting seat 32 to move upward again so that the elastic limiting pin 433 is embedded in the relatively unlocked screw hole 62, and the second moving mechanism 54 drives the two locking guns 52 to move downward through the two locking grooves 442 and extend into the two screw holes 62 to lock the screws in the corresponding screw holes 62. The above operation is repeated until the locking of multiple screw holes on the annular workpiece 6 is completed. When the screw holes 62 corresponding to the two elastic limiting pins 433 have been locked with screws, the elastic positioning pin 433 is compressed upward under the action of the screw, so that the front end of the limiting rod 432 presses against the screw to limit the position;

[0054] The locking is completed. When the locking gun 52 completes the last screw locking of the annular workpiece 6, the driving assembly 37 drives the support seat 36 to move and reset in the direction away from the lifting seat 32, and the lifting assembly 34 drives the lifting seat 32 to move downward and reset, so that the annular workpiece 6 falls back on the pallet 2 and moves to the next workstation with the pallet.

[0055] The present application defines the structure of the rotary locking device and sets a rotating component 35 in the lifting mechanism 3. While realizing the lifting of the annular workpiece 6, it can also drive the annular workpiece 6 to rotate so as to lock the multiple screw holes 62 on the annular workpiece 6, thereby simplifying the structure of the device. In addition, each mechanism is independently set, and the overall maintenance is easy, which can reduce the subsequent maintenance cost. Among them, the structure of the positioning mechanism 4 is further defined, and a limit component 43 is set to cooperate with the lifting mechanism 3. When the annular workpiece 6 is lifted to the locking position, the positioning of the annular workpiece 6 can be completed to ensure the stability of the annular workpiece 6 during the locking process, thereby improving the assembly quality of the finished annular workpiece. In addition, the structure of the locking mechanism 5 is further defined, and the two locking guns 52 cooperate with the moving mechanism to simultaneously lock the screws of the two opposite screw holes on the annular workpiece 6, effectively improving the assembly efficiency, and further defining the structure of the first moving mechanism 53, so that the two locking guns 52 can move toward or away from each other at the same time to adapt to the variable-distance locking of annular workpieces 6 of different sizes, and the overall compatibility is strong.

[0056] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the application scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A rotation locking device for an annular workpiece, the annular workpiece comprising an annular workpiece body and a plurality of screw holes circumferentially distributed on the annular workpiece body, characterized in that: The rotary locking device comprises a base, a tray, a lifting mechanism, a positioning mechanism and a locking mechanism. A tray is movably arranged on the base and is used for placing the annular workpiece; The lifting mechanism is arranged on the base and is located below the tray, and includes a lifting platform arranged on the base, a lifting seat which can be lifted and lowered on the lifting platform, a lifting rod arranged on the lifting seat which can lift the annular workpiece on the tray upward, a lifting assembly arranged on the lifting platform which drives the lifting seat to move up and down, a rotating assembly arranged on the lifting seat which is connected to and drives the lifting rod to rotate, a supporting seat which can move back and forth relative to the lifting seat and is supported at the bottom of the lifting seat, and a driving assembly arranged on the lifting platform which is connected to and drives the supporting seat to move; The positioning mechanism is arranged on the base and located above the tray, including a positioning frame, a positioning plate arranged on the positioning frame and relative to the annular workpiece, a limiting assembly relatively arranged at the bottom of the positioning plate to limit the locking position of the annular workpiece, and a locking hole arranged on the positioning plate and capable of being opposite to two relatively arranged screw holes, wherein the limiting assembly includes two limiting seats relatively arranged at the bottom of the positioning plate, two limiting rods relatively arranged on the two limiting seats, and two elastic limiting pins respectively arranged in the two limiting rods; the locking hole includes a locking hole body arranged in the middle of the positioning plate and two locking grooves relatively arranged at both sides of the locking hole body and extending outwards and capable of being opposite to the two relatively arranged screw holes; The locking mechanism includes a locking seat arranged on a base, two locking guns arranged on the locking seat and movable toward or away from each other, a first moving mechanism arranged on the locking seat and connected to and driving the two locking guns to move, a second moving mechanism arranged on the base and connected to and driving the locking seat to move up and down, and a third moving mechanism arranged on the base and connected to and driving the locking seat to move left and right. The lower ends of the two locking guns are respectively opposite to the two locking grooves to cooperate with the second moving mechanism and move downward to lock the screws in the corresponding screw holes.

2. The rotation locking device for an annular workpiece according to claim 1, characterized in that: The rotating assembly comprises a rotating motor arranged on a lifting seat, a rotating gear connected to an output shaft of the rotating motor, and a driven gear arranged at the bottom of the lifting rod and matched with the rotating gear.

3. The rotation locking device for an annular workpiece according to claim 1, characterized in that: The annular workpiece also includes a connecting rod arranged in the middle of the annular workpiece body, the lifting rod includes a lifting rod body, a lifting block arranged on the lifting rod body and supported on the bottom of the annular workpiece body, and a lifting part arranged on the top of the lifting block and connected to the connecting rod, and an arc-shaped limiting slot extending downward for the connecting rod to be embedded is formed on the upper end of the lifting part. When the lifting rod lifts the annular workpiece, the annular workpiece body is supported on the lifting block, and the connecting rod is embedded in the relative arc-shaped limiting slot, so that the annular workpiece can rotate with the lifting rod.

4. The rotation locking device for an annular workpiece according to claim 1, characterized in that: The annular workpiece body is formed with a mounting groove extending downward, and a plurality of screw holes are circumferentially distributed in the mounting groove. The limit seat is provided with an arc-shaped limit portion that can be pressed against the upper end of the annular workpiece, and the limit rod is arranged on the inner side of the arc-shaped limit portion, and its lower end is lower than the lower end of the arc-shaped limit portion.

5. The rotation locking device for an annular workpiece according to claim 1, characterized in that: The positioning frame is provided with a clearance hole opposite to the locking hole, the positioning plate is fixed to the bottom surface of the positioning frame through a quick locking mechanism, the positioning plate includes two quick locking holes diagonally arranged on the positioning plate and two positioning holes diagonally arranged, and the positioning frame is provided with two positioning rods that can be embedded in the relative positioning holes.

6. The rotation locking device for an annular workpiece according to claim 1, characterized in that: The lifting assembly includes two lifting plates relatively arranged on both sides of the lifting seat, two lifting cylinders arranged on the lifting platform and connected to the two lifting plates respectively, two guide blocks relatively arranged on both sides of the lifting seat, two guide rails arranged on the lifting platform and respectively matched with the two guide blocks, and a buffer block arranged on the side of a guide rail.

7. The rotation locking device for an annular workpiece according to claim 1, characterized in that: The driving assembly includes a moving block movably arranged on the lifting platform, a moving cylinder arranged on the lifting platform and connected to and driving the moving block to move, a positioning groove extending inward from the side of the lifting seat along the moving direction of the moving block, a positioning seat arranged in the positioning groove, and a moving cavity arranged on the positioning seat for the moving block to move back and forth.

8. The rotation locking device for an annular workpiece according to claim 1, characterized in that: The first moving mechanism includes two mounting plates arranged on the lock base for mounting two lock guns, a bidirectional screw rotatably arranged on the lock base, two nut seats arranged on the bidirectional screw and connected to the two mounting plates respectively, a first moving motor arranged on the lock base and connected to and driving the bidirectional screw, two first guide rails relatively arranged on both sides of the bidirectional screw and a first guide slide relatively arranged on the mounting plate and respectively cooperating with the two first guide rails.

9. The rotation locking device for an annular workpiece according to claim 1, characterized in that: The second moving mechanism includes a mounting plate arranged on the base, a lifting screw rotatably arranged on the mounting plate and extending in a vertical direction, a lifting nut seat arranged on the lock seat and cooperating with the lifting screw, two second guide rails relatively arranged on the mounting plate and located on both sides of the lifting screw, and two second guide slides respectively arranged on the lock seat and cooperating with the two second guide rails.

10. A method for locking an annular workpiece, characterized in that: The locking is performed based on the rotary locking device according to claim 1, specifically comprising the following steps: In preparation for locking, the annular workpiece is placed on the pallet, and moves with the pallet to the locking position, opposite to the two locking guns. The lifting seat moves upward to drive the lifting rod to lift the annular workpiece on the pallet upward, so that the two elastic limit pins at the bottom of the positioning plate are respectively embedded in the relative screw holes to complete the positioning of the annular workpiece. At the same time, the driving assembly drives the support seat to move to the bottom of the lifting seat to complete the locking preparation of the annular workpiece; During the locking process, the first moving mechanism drives the two locking guns to move toward or away from each other so that the lower ends of the two locking guns are respectively opposite to the two locking grooves, and the second moving mechanism drives the two locking guns to move downward through the two locking grooves and extend into the two screw holes to lock the screws in the corresponding screw holes, and then the lifting assembly drives the lifting seat to move downward to be supported on the support seat, and the second moving mechanism drives the two locking guns to reset. At this time, the annular workpiece is supported on the lifting rod and does not fall back to the pallet, and the rotating assembly drives the lifting rod to rotate so that the adjacent unreturned parts on the annular workpiece are The locked screw hole rotates to the locked position, and the lifting assembly drives the lifting seat to move upward again to make the elastic limit pin embedded in the relatively unlocked screw hole, and the second moving mechanism drives the two locking guns to move downward through the two locking grooves and extend into the two screw holes to lock the screws in the corresponding screw holes. The above operation is repeated until the locking of multiple screw holes on the annular workpiece is completed. When the screw holes corresponding to the two elastic limit pins have been locked with screws, the elastic positioning pin is compressed upward under the action of the screw, so that the front end of the limit rod is pressed against the screw for limiting; The locking is completed. When the locking gun completes the last screw locking of the annular workpiece, the driving assembly drives the support seat to move and reset in the direction away from the lifting seat, and the lifting assembly drives the lifting seat to move downward and reset, so that the annular workpiece falls back on the pallet and moves to the next workstation with the pallet.

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