A stable clamping tool for nut machining

Abstract

The application discloses a stable clamping tool for nut machining, relates to the technical field of nut machining, and comprises a bottom plate, a nut, a middle operation table fixedly arranged on the bottom plate through a support column, and a top operation table fixedly arranged on the upper portion of the middle operation table, further comprises a supporting module arranged on the bottom plate, a positioning module arranged on the middle operation table, and a locking module arranged on the top operation table. The advantages are that the plurality of abutting columns with the upper end inclined design are used to clamp and position the nut, so that the nut is placed more conveniently; the limiting telescopic rod is used to limit the stroke of the support, so that the elastic clamping is changed into rigid clamping, which not only plays a role in preliminary positioning, but also can lock the nut, and can ensure the accurate positioning of the nut.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of nut machining, and in particular to a stable clamping tool for nut machining. BACKGROUND

[0002] In the modern mechanical manufacturing field, as basic parts for connection and fastening, the machining quality of nuts directly affects the assembly precision and overall performance of mechanical products, and therefore, in the process of nut tapping, a clamping tool needs to be used to clamp and fix the nut in order to improve the precision of machining.

[0003] The existing clamping tools are mainly divided into two types, one is clamping disc fixing, and the other is mold fixing. The clamping disc fixing operation is complicated, and manual adjustment and alignment are needed when placing the nut, thereby reducing the overall machining efficiency. Therefore, the clamping tool for nut machining disclosed in the application has the installation seat, the mounting seat, the limiting frame, the limiting groove and the electric telescopic spring, and the mounting seat is arranged on the top end outer surface of the fixing seat, the limiting groove is arranged in the side edge of the mounting seat close to the middle, and the limiting frame is arranged on the top end inner wall of the mounting seat close to the limiting groove.

[0004] When the above-mentioned clamping tool is used, the placement plate, the limiting block, the limiting rod, the auxiliary block and the compression spring are arranged, so that when the nut body is placed, only the two side outer surfaces of the nut body need to be in contact with the one side outer surface of the auxiliary block, so that the two side clamping angles of the nut body are aligned with the centers of the two clamps, the accuracy of the overall placement alignment is ensured, the alignment is accurate when the clamping is performed, the clamping effect is good, the deviation is not easy to occur, and the positioning effect is ensured.

[0005] However, when the above-mentioned clamping tool is used, although the auxiliary block can be used to preliminarily position the nut, after long-term use, the compression spring for resetting will be elastically fatigued, the compression forces of the compression springs corresponding to the two auxiliary blocks are inconsistent, the compression forces of the two compression springs are the same when the auxiliary block is clamped, but the compression amounts are different, the positions of the nuts positioned on the placement plate are different, and the horizontal positions of the two limiting blocks are always the same. This will cause the nut and the limiting block to be misaligned, and the nut will relatively displace the limiting block to generate friction during the clamping stress process, thereby causing scratches on the surface of the nut.

[0006] Secondly, the operation of placing the nut is not convenient, the auxiliary block on one side needs to be manually pressed and moved, then the nut is placed on the placement plate, and then the auxiliary block is loosened. There is friction between the nut and the placement plate, the compression spring needs to overcome the friction, and the position of the nut placed each time will have a certain deviation. Even if the compression spring is new, the deviation still exists.

[0007] Therefore, a new type of stable clamping tool for nut machining can be used to solve the problems of the prior art. SUMMARY

[0008] The purpose of the present application is to solve the problem of the prior art that the positioning position of the nut is not fixed, resulting in misalignment of the nut and the limiting block and causing clamping friction scratches. Therefore, a stable clamping tool for nut machining is proposed.

[0009] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0010] A stable clamping tool for nut machining, comprising a base plate, a nut, a middle operation table fixedly installed on the base plate through a support column, and a top operation table fixedly installed on the upper part of the middle operation table, further comprising a supporting module installed on the base plate, a positioning module installed on the middle operation table, and a locking module installed on the top operation table.

[0011] The supporting module is used to lift the bottom of the nut, and the lifting position is adjusted according to different sizes of the nut.

[0012] The positioning module is used to preliminarily position the nut, so that the nut always remains in the same position, and the position clamped with the nut can be adjusted according to the size of the nut to meet the demand of clamping and positioning nuts of different sizes.

[0013] The locking module is used to clamp and lock the preliminarily positioned nut, keeping the nut in a stable state to facilitate tapping operation.

[0014] Preferably, the supporting module comprises a limiting plate slidably installed on two support columns, a tray unit is fixedly installed on the limiting plate and cooperates with the nut to support the bottom of the nut, a hydraulic rod is fixedly installed between the base plate and the limiting plate to change the height of the limiting plate.

[0015] Preferably, the tray unit comprises a disc fixedly connected with the limiting plate, a plurality of gear cylinders are rotatably installed on the disc, a gear ring is rotatably installed on the disc and engaged with the plurality of gear cylinders, a helical guide rail is fixedly installed on the gear ring, and a plurality of supporting claws cooperating with the nut are slidably installed on the disc, and a tooth plate cooperating with the helical guide rail is fixedly installed on the bottom of each supporting claw.

[0016] Preferably, the positioning module comprises two positioning units installed on the middle operation table, the positioning unit comprises a sliding plate slidably installed on the middle operation table, and a driving assembly cooperating with the two sliding plates is installed on the middle operation table.

[0017] Preferably, the driving assembly comprises two push rods provided with guide grooves and slidingly mounted on the middle operation table, one push wheel is rotatably mounted on each of the two sliding plates and matched with the corresponding guide groove, one movable frame is fixedly and jointly mounted on the two push rods, an electric push rod is fixedly mounted on the movable frame, and the telescopic end of the electric push rod is fixedly connected between the middle operation table.

[0018] Preferably, the positioning unit further comprises a connecting block fixedly mounted on the sliding plate, a support is mounted on the connecting block through a compensation mechanism, two rotating frames are rotatably mounted on the support, an abutting column with an inclined upper end and matched with the nut is fixedly mounted on the end of each of the two rotating frames away from the support, the two rotating frames are connected through the same gear set, a spring reel is fixedly mounted between each of the two rotating frames and the support, and an opening angle adjusting mechanism is mounted between the two rotating frames.

[0019] Preferably, the compensation mechanism comprises a plurality of limiting telescopic rods fixedly mounted on the connecting block, the telescopic end of each of the limiting telescopic rods is fixedly connected between the connecting block and the support, and a plurality of return springs are fixedly mounted between the connecting block and the support.

[0020] Preferably, the opening angle adjusting mechanism comprises a rotating block rotatably mounted on the corresponding rotating frame, a screw rod is fixedly mounted on one of the rotating blocks, a threaded sleeve for adjusting the opening angle between the two rotating frames is threadedly rotatably mounted on the screw rod, and the screw rod penetrates through the other rotating block.

[0021] Preferably, the locking module comprises two clamping plates for clamping the nut and slidingly mounted on the top operation table, a circular ring is rotatably mounted on the top operation table, two frame bodies are rotatably mounted on the circular ring, two clamping wheels matched with the corresponding clamping plate are rotatably mounted on each of the two frame bodies, the distance between the two clamping wheels on the same frame body is the same as the thickness of the clamping plate, a pneumatic telescopic rod matched with one of the clamping plates is fixedly mounted on the middle operation table, and a driving assembly matched with the circular ring is mounted on the top operation table.

[0022] Preferably, the driving assembly comprises an electric motor fixedly mounted on the top operation table, a worm is rotatably mounted on the top operation table, the worm is connected with the driving end of the electric motor through a transmission gear set, and a worm ring matched with the worm is fixedly mounted on the circular ring.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] 1. When clamping and tapping nuts, this device uses multiple pressure columns with an inclined upper end to clamp and position the nuts. This way, you only need to place the nut horizontally between the multiple pressure columns and then press it down, making the operation more convenient and the placement efficiency of the nuts higher.

[0025] 2. When clamping and tapping the nut, this device uses a limiting telescopic rod to limit the support. After the return spring is compressed to a certain extent, the limiting telescopic rod will restrict the movement of the support, causing the support and the connecting block to move together, thus forming a rigid resistance. At the same time, the connecting blocks on both sides of the nut move in the opposite direction, which will form a rigid clamp on the nut. This not only ensures that the initial positioning of the nut is fixed, but also improves the stability of the nut when clamping it in the future.

[0026] 3. When clamping and tapping nuts, this device can control the limit angle between two rotating frames on the same support by setting a lead screw, a rotating block and a threaded sleeve. This allows for the positioning of nuts of different sizes. The larger the angle, the larger the nut size that can be used, thus expanding the range of applications.

[0027] 4. When this device clamps and taps the nut, it drives the push wheel to move through the guide groove on the push rod, which in turn drives the sliding plate to move. Since the pressure between the guide groove and the push wheel will decompose the force along the guide groove, part of the reaction force will be transmitted to the central operating table, and the other part of the reaction force will be transmitted to the electric push rod. This can reduce the reaction force at the extension end of the electric push rod, improve the accuracy of the electric push rod, and extend the service life of the electric push rod.

[0028] 5. When this device clamps and taps the nut, the rotating ring and clamping wheel drive the two clamping plates to move synchronously in opposite directions, which is more accurate and can ensure the accuracy of tapping and improve the tapping quality. In addition, the worm gear ring drives the ring to rotate, so that the clamping plates can still clamp the nut when the motor stops. Attached Figure Description

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of a stable clamping fixture for nut processing proposed in this invention;

[0031] Figure 2 for Figure 1 Detailed schematic diagram of the structure after rotation at a certain angle;

[0032] Figure 3 for Figure 2 Detailed schematic diagram of the frontal planar structure;

[0033] Figure 4For Figure 2 Enlarged structural schematic diagram of the middle base plate and the supporting module;

[0034] Figure 5 For Figure 4 Enlarged structural schematic diagram of the middle tray unit;

[0035] Figure 6 For Figure 5 Schematic diagram of the internal structure of the tray unit;

[0036] Figure 7 For Figure 2 Enlarged structural schematic diagram of the middle operation platform and the positioning module;

[0037] Figure 8 For Figure 7 Schematic diagram of the structure after rotating by a certain angle;

[0038] Figure 9 For Figure 7 Enlarged structural schematic diagram of the positioning unit;

[0039] Figure 10 For Figure 9 Schematic diagram of the top planar structure;

[0040] Figure 11 For Figure 9 Schematic diagram of the structure after removing the sliding plate and the pushing wheel and rotating by a certain angle;

[0041] Figure 12 For Figure 11 Schematic diagram of the structure after removing the same-motion gear set, the connecting block, the reset spring and the limiting telescopic rod and rotating by a certain angle;

[0042] Figure 13 For Figure 2 Enlarged structural schematic diagram of the top operation platform and the locking module;

[0043] Figure 14 For Figure 13 Schematic diagram of the sectional structure;

[0044] Figure 15 For Figure 14 Enlarged structural schematic diagram of the worm gear ring, the nut and the clamping plate after rotating by a certain angle;

[0045] Figure 16 For Figure 15 Schematic diagram of the front planar structure.

[0046] In the figure: 1 bottom plate, 2 middle operation table, 3 top operation table, 4 supporting module, 5 positioning module, 6 locking module, 7 nut, 8 hydraulic rod, 9 tray unit, 10 limiting plate, 11 disc, 12 supporting claw, 13 tooth cylinder, 14 tooth ring, 15 spiral guide rail, 16 tooth plate, 17 movable frame, 18 electric push rod, 19 positioning unit, 20 push rod, 21 push wheel, 22 sliding plate, 23 pressing column, 24 connecting block, 25 same gear set, 26 support, 27 return spring, 28 limiting telescopic rod, 29 rotating block, 30 screw rod, 31 worm, 32 motor, 33 transmission gear set, 34 worm ring, 35 pneumatic telescopic rod, 36 clamping plate, 37 spring reel, 38 circular ring, 39 frame body, 40 clamping wheel. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0048] Embodiment one: refer to Figures 1-7 A stable clamping tool for nut machining, comprising a bottom plate 1, a nut 7, a middle operation table 2 fixedly installed on the bottom plate 1 through a support column, and a top operation table 3 fixedly installed on the upper part of the middle operation table 2, further comprising a supporting module 4 installed on the bottom plate 1, a positioning module 5 installed on the middle operation table 2, and a locking module 6 installed on the top operation table 3.

[0049] The supporting module 4 is used for lifting the bottom part of the nut 7, and adjusting the lifting position according to nuts 7 of different sizes, and adjusting according to nuts 7 of different lengths, so as to ensure that the bottom part of the nut 7 is lifted by the supporting module 4.

[0050] The supporting module 4 comprises a limiting plate 10 slidingly installed on two of the support columns, and the limiting plate 10 is fixedly installed with a tray unit 9, which cooperates with the nut 7 to support the bottom part of the nut 7. The bottom plate 1 and the limiting plate 10 are fixedly installed with a hydraulic rod 8 for changing the height of the limiting plate 10.

[0051] Starting the hydraulic rod 8, the height of the limiting plate 10 changes with the extension and retraction of the hydraulic rod 8, and the position of the tray unit 9 on the limiting plate 10 also changes. The position of the tray unit 9 requires that the upper surface of the nut 7 is lower than the height of the upper surface of the top operation table 3, so that the nut 7 can be effectively prevented from bouncing out. In order to reduce the influence of the debris generated by tapping on the tray unit 9, an air-jet cleaning method is used to clean the debris on the tray unit 9.

[0052] The tray unit 9 comprises a disc 11 fixedly connected with the limiting plate 10, a plurality of tooth cylinders 13 are rotatably installed on the disc 11, and a tooth ring 14 engaged with the plurality of tooth cylinders 13 is rotatably installed on the disc 11, the screw guide rail 15 is fixedly installed on the tooth ring 14, and a plurality of clamping claws 12 matched with the nuts 7 are slidably installed on the disc 11, and a tooth plate 16 matched with the screw guide rail 15 is fixedly installed at the bottom of each clamping claw 12.

[0053] Rotating one of the tooth cylinders 13 drives the tooth ring 14 engaged with the tooth cylinder 13 to rotate, and the rotation of the tooth ring 14 drives the screw guide rail 15 to rotate, so that the tooth plate 16 drives the clamping claw 12 to move on the disc 11, thereby changing the position of the clamping claw 12;

[0054] The tooth gap of the tooth plate 16 at the bottom of each clamping claw 12 is different, and the arrangement is staggered, so that each clamping claw 12 moves by the same stroke, and the clamping claw 12 moves to the outside of the tapping hole of the nut 7, so that the tapping drill can smoothly penetrate the nut 7, and the clamping claw 12 does not affect the movement of the tapping drill.

[0055] Embodiment two: The difference between the technical scheme of this embodiment and that of embodiment one is that Figures 1-3 , Figures 7-12 The positioning module 5 is used for preliminarily positioning the nut 7, so that the nut 7 always remains at the same position, and the position clamped with the nut 7 can be adjusted according to the size of the nut 7, thereby meeting the demand for clamping and positioning nuts 7 of different sizes.

[0056] The positioning module 5 comprises two positioning units 19 installed on the middle operation table 2, and the positioning unit 19 comprises a sliding plate 22 slidably installed on the middle operation table 2, and the middle operation table 2 is provided with a driving assembly matched with the two sliding plates 22.

[0057] The driving assembly comprises two push rods 20 provided with guide grooves and slidably installed on the middle operation table 2, one push wheel 21 matched with the corresponding guide groove is rotatably installed on each of the two sliding plates 22, one movable frame 17 is fixedly installed on the two push rods 20, an electric push rod 18 is fixedly installed on the movable frame 17, and the extension end of the electric push rod 18 is fixedly connected with the middle operation table 2.

[0058] Starting the electric push rod 18, the extension of the extension end of the electric push rod 18 drives the movable frame 17 fixedly connected therewith to move, thereby driving the push rod 20 fixedly connected with the movable frame 17 to move, and since the push rod 20 is provided with the guide groove, under the abutting force, the guide groove abuts against the push wheel 21 to drive the positioning unit 19 to slide along the middle operation table 2, thereby changing the distance between the two positioning units 19, so as to realize the clamping and positioning operation of the nut 7;

[0059] The moving design of the guide groove matched with the pushing wheel 21 can conduct part of the pressing force between the pushing wheel 21 and the pushing rod 20 to the pushing rod 20 and the middle operation table 2, and distribute the reaction force on the electric pushing rod 18, thereby reducing the stress on the electric pushing rod 18 (as shown in Figure 8 As shown, according to the force decomposition, the low pressure between the pushing wheel 21 and the pushing rod 20 is decomposed, part of which is along the direction of the line connecting the two pushing wheels 21, and the low pressure is used to drive the pushing wheel 21 to move to the side close to the nut 7, and the other part of the force is perpendicular to the line connecting the two pushing wheels 21, and the part of the force is offset by the pushing force of the electric pushing rod 18).

[0060] The positioning machine set 19 further comprises a connecting block 24 fixedly installed on the sliding plate 22, and a support 26 installed on the connecting block 24 through a compensation mechanism;

[0061] The compensation mechanism comprises a plurality of limiting telescopic rods 28 fixedly installed on the connecting block 24, and each telescopic end of each limiting telescopic rod 28 is fixedly connected with the support 26, and a plurality of return springs 27 are fixedly installed between the connecting block 24 and the support 26.

[0062] The support 26 is rotatably installed with two rotating frames, and the end away from the support 26 of each rotating frame is fixedly installed with a pressing column 23 with an inclined design at the upper end and matched with the nut 7, the two rotating frames are connected through the same gear set 25, and a spring reel 37 is fixedly installed between each rotating frame and the support 26, and an opening angle adjusting mechanism is installed between the two rotating frames.

[0063] Firstly, the nut 7 is horizontally placed between the plurality of pushing wheels 21, the corners of the nut 7 are inserted between the corresponding two pressing columns 23, and then the nut 7 is pressed to be clamped between the multi-purpose pressing columns 23, at this time each pressing column 23 will drive the rotating frame to rotate on the support 26, and the two rotating frames located on the same support 26 will have the same rotating angle under the action of the same gear set 25, so as to ensure that the nut 7 is located in the middle position of the two pressing columns 23, and the bottom of the nut 7 is in abutment with the claw 12, and under the action of the spring reel 37, the pressing column 23 will always abut against the nut 7 to position the nut 7;

[0064] The plurality of pressing columns 23 with the inclined design at the upper end are used to clamp and position the nut 7, so that the nut 7 only needs to be horizontally placed between the plurality of pressing columns 23, and then pressed, which is more convenient to operate and has higher efficiency in placing the nut 7.

[0065] After clamping and positioning, the electric push rod 18 is started to drive the push wheel 21 to move, the push wheel 21 drives the sliding plate 22 to move, thereby driving the sliding plate 22 to move and drive the connecting block 24 fixedly connected thereto to move, thereby driving the support 26 to move, the movement of the support 26 causes the abutting column 23 to abut against the nut 7, and until the included angle between the two abutting columns 23 on the same support 26 reaches the maximum, at this time, the movement of the connecting block 24 causes the distance between the support 26 and the connecting block 24 to decrease, and the reset spring 27 is compressed. The entire clamping and positioning process is elastic clamping and positioning, and the stability is not high. Until the distance between the connecting block 24 and the support 26 is compressed to the limit value of the limiting telescopic rod 28 (the limiting telescopic rod 28 cannot be compressed any more), at this time, the limiting telescopic rod 28, the connecting block 24 and the support 26 form a rigid connection, and a rigid abutting force is generated on the abutting column 23. At this time, the nut 7 is abutted by the abutting column 23 and does not tilt and deviate in any way, and the stability is greatly improved.

[0066] The included angle adjusting mechanism comprises a rotating block 29 rotatably installed on a corresponding rotating frame. One of the rotating blocks 29 is fixedly installed with a lead screw 30, and a threaded sleeve for adjusting the included angle between the two rotating frames is threadedly and rotatably installed on the lead screw 30. The lead screw 30 penetrates the other rotating block 29.

[0067] Because the nuts 7 of different sizes have different requirements for the included angle of the abutting column 23, for the small-sized nut 7, the included angle of the abutting column 23 needs to be small, and vice versa, for the large-sized nut 7, the included angle of the abutting column 23 needs to be large, so as to improve the stability of clamping the nut 7. Therefore, it is necessary to limit the included angle limit between the two rotating frames. The operation is as follows:

[0068] The threaded sleeve is rotated to change the position of the threaded sleeve on the lead screw 30. As the included angle between the two rotating frames gradually increases, the lead screw 30 will slide on the rotating block 29 penetrated thereby. As the angle between the two rotating frames changes, the two rotating blocks 29 will also rotate on the corresponding rotating frames to keep the lead screw 30 horizontal. Until the threaded sleeve on the lead screw 30 moves to abut against the rotating block 29 penetrated by the lead screw 30, the lead screw 30 will not continue to move relative to the rotating block 29, so the distance between the two rotating frames will not increase any more. In this way, the included angle between the two rotating frames is controlled, and the included angle limit is changed by only rotating the threaded sleeve to change the position of the threaded sleeve on the lead screw 30.

[0069] Embodiment three: The difference between the technical scheme of this embodiment and that of embodiment two is that the locking module 6 is used to clamp and lock the nut 7 after preliminary positioning, so as to keep the nut 7 in a stable state and facilitate tapping operation. Figures 1-3 Figures 13-16 The locking module 6 is used to clamp and lock the nut 7 after preliminary positioning, so as to keep the nut 7 in a stable state and facilitate tapping operation.

[0070] ​Locking module 6 includes two clamping plates 36 for clamping nut 7, which are slidingly installed on top operation table 3, and a circular ring 38 is rotatably installed on top operation table 3, two frame bodies 39 are rotatably installed on circular ring 38, two clamping wheels 40 are rotatably installed on each frame body 39, which are matched with corresponding clamping plates 36, the distance between the two clamping wheels 40 on the same frame body 39 is the same as the thickness of clamping plate 36, and a pneumatic telescopic rod 35 matched with one of the clamping plates 36 is fixedly installed on middle operation table 2 (after nut 7 is fixed, clamping plate 36 abuts against nut 7, at this time, in order to improve the rigidity of clamping plate 36, pneumatic telescopic rod 35 is started to make the telescopic end of pneumatic telescopic rod 35 abut against one of the clamping plates 36, and the middle position of the clamping plate 36 is pressed to improve the rigidity of clamping plate 36), and a driving assembly matched with circular ring 38 is installed on top operation table 3.

[0071] The driving assembly includes a motor 32 fixedly installed on top operation table 3, a worm 31 rotatably installed on top operation table 3, and a transmission gear set 33 connected between the driving end of motor 32 and worm 31, and a worm ring 34 fixedly installed on circular ring 38 and matched with worm 31.

[0072] After nut 7 is rigidly positioned by abutting against column 23, motor 32 is started, the driving end of motor 32 drives worm 31 to rotate, thereby driving worm ring 34 to rotate, worm ring 34 rotating drives two clamping plates 36 to move at the same time and in the opposite direction at the same stroke (at the same time, frame body 39 also rotates on worm ring 34), until the horizontal edges of nut 7 are clamped by two clamping plates 36, so as to finally lock nut 7;

[0073] The purpose of using clamping plate 36 is to increase the contact area with the edge of nut 7, thereby reducing the probability of nut 7 being scratched;

[0074] The thickness of clamping plate 36 in the figure is relatively thin, which is for the convenience of observation, and the thickness of clamping plate 36 actually used is more than 5 cm;

[0075] The purpose of using worm ring 34 and worm 31 is to clamp and fix nut 7 by clamping plate 36 when motor 32 is stopped.

[0076] The specific operation steps of the device are as follows:

[0077] Start hydraulic rod 8, the height of the limit plate 10 changes with the extension of the hydraulic rod 8, the height of the claw 12 is changed according to the size of the nut 7, then rotate one of the tooth barrels 13, the tooth barrel 13 drives the meshing tooth ring 14 to rotate, the tooth ring 14 drives the spiral guide rail 15 to rotate, so that the tooth plate 16 drives the claw 12 to move on the disc 11, so as to change the position of the claw 12, so that the claw 12 moves to the outside of the tapping hole of the nut 7, and ensures that the tapping drill can smoothly penetrate the nut 7;

[0078] Then, the nut 7 is horizontally placed between the plurality of push wheels 21, the edge of the nut 7 is inserted between the corresponding two pressing columns 23, and then the nut 7 is pressed to be clamped between the multi-purpose pressing columns 23, at this time, each pressing column 23 drives the rotating frame to rotate on the support 26, the two rotating frames located on the same support 26 will have the same rotating angle under the action of the same gear set 25, so as to ensure that the nut 7 is located between the two pressing columns 23, and the bottom of the nut 7 abuts against the claw 12, under the action of the spring reel 37, the pressing column 23 will always abut against the nut 7 to position the nut 7;

[0079] Start the electric push rod 18, the extension of the extension end of the electric push rod 18 drives the movable frame 17 to move, thereby driving the push rod 20 fixedly connected with the movable frame 17 to move, the guide groove on the push rod 20 abuts against the push wheel 21 to drive the push wheel 21 to move, thereby driving the sliding plate 22 to move, and driving the connecting block 24 fixedly connected with the sliding plate 22 to move, thereby driving the support 26 to move, the movement of the support 26 will make the pressing column 23 abut against the nut 7, until the included angle between the two pressing columns 23 on the same support 26 reaches the maximum, at this time, the movement of the connecting block 24 will reduce the distance between the support 26 and the connecting block 24, and the reset spring 27 is compressed, the whole clamping and positioning process is elastic clamping and positioning, and the stability is not high, until the distance between the connecting block 24 and the support 26 is compressed to the limit value of the limiting telescopic rod 28, at this time, the limiting telescopic rod 28, the connecting block 24 and the support 26 form a rigid connection, and a rigid pressing force is generated on the pressing column 23, at this time, the nut 7 is pressed by the pressing column 23;

[0080] Finally, start the motor 32, the driving end of the motor 32 drives the worm 31 to rotate, thereby driving the worm gear ring 34 to rotate, the rotation of the worm gear ring 34 will drive the two clamping plates 36 to move at the same time and in the opposite direction through the clamping wheel 40, until the two clamping plates 36 clamp the horizontal edge of the nut 7, so as to finally lock the nut 7.

[0081] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A stable clamping tool for nut machining, comprising a base plate (1), a nut (7), a middle operation table (2) fixedly installed on the base plate (1) through a support column, and a top operation table (3) fixedly installed on the upper part of the middle operation table (2), characterized in that, It also includes a support module (4) installed on the bottom plate (1), a positioning module (5) installed on the middle operating table (2), and a locking module (6) installed on the top operating table (3); The support module (4) is used to lift the bottom of the nut (7) and adjust the lifting position according to the size of the nut (7); The support module (4) includes a limiting plate (10) slidably installed on two struts, a tray unit (9) fixedly installed on the limiting plate (10), and a hydraulic rod (8) fixedly installed between the bottom plate (1) and the limiting plate (10) for changing the height of the limiting plate (10). The positioning module (5) is used to preliminarily position the nut (7) and keep the nut (7) in the same position, and can adjust the position of the nut (7) according to the size of the nut (7) to meet the demand of clamping and positioning nuts (7) of different sizes. The positioning module (5) includes two positioning units (19) installed on the middle operating table (2), and the positioning unit (19) includes a sliding plate (22) slidably installed on the middle operating table (2), and a drive assembly installed on the middle operating table (2) and cooperating with the two sliding plates (22). The locking module (6) is used to clamp and lock the preliminarily positioned nut (7) to keep the nut (7) in a stable state for tapping operation. The locking module (6) includes two clamping plates (36) slidably installed on the top operating table (3) for clamping the nut (7), a circular ring (38) rotatably installed on the top operating table (3), two frame bodies (39) rotatably installed on the circular ring (38), two clamping wheels (40) rotatably installed on each of the two frame bodies (39) and cooperating with the corresponding clamping plate (36), the distance between the two clamping wheels (40) on the same frame body (39) being the same as the thickness of the clamping plate (36), a pneumatic telescopic rod (35) fixedly installed on the middle operating table (2) and cooperating with one of the clamping plates (36), and a drive assembly installed on the top operating table (3) and cooperating with the circular ring (38).

2. The stable clamping tool for nut machining according to claim 1, wherein The tray unit (9) includes a disc (11) fixedly connected with the limiting plate (10), a plurality of gear cylinders (13) rotatably installed on the disc (11), a gear ring (14) rotatably installed on the disc (11) and engaging with the plurality of gear cylinders (13), a helical guide rail (15) fixedly installed on the gear ring (14), and a plurality of clamping jaws (12) slidably installed on the disc (11) and cooperating with the nut (7), each clamping jaw (12) having a tooth plate (16) fixedly installed at the bottom and cooperating with the helical guide rail (15).

3. The stable clamping tool for nut machining according to claim 1, wherein The driving assembly comprises two push rods (20) with guide grooves slidably mounted on the middle operation table (2), one push wheel (21) is rotatably mounted on each of the two sliding plates (22) and matched with the corresponding guide groove, an activity frame (17) is fixedly and commonly mounted on the two push rods (20), an electric push rod (18) is fixedly mounted on the activity frame (17), and the electric push rod (18) is fixedly connected between the telescopic end and the middle operation table (2).

4. The stable clamping tool for nut machining according to claim 1, wherein The positioning unit (19) further comprises a connecting block (24) fixedly mounted on the sliding plate (22), a support (26) mounted on the connecting block (24) through a compensation mechanism, two rotating frames rotatably mounted on the support (26), an upper end of each of the two rotating frames being fixedly installed and matched with the nut (7), the two rotating frames being connected through the same gear set (25), a spring reel (37) fixedly mounted between each of the two rotating frames and the support (26), and an opening angle adjusting mechanism mounted between the two rotating frames.

5. The stable clamping tool for nut machining according to claim 4, wherein The compensation mechanism comprises a plurality of limiting telescopic rods (28) fixedly mounted on the connecting block (24), the telescopic end of each of the limiting telescopic rods (28) being fixedly connected with the support (26), and a plurality of return springs (27) fixedly mounted between the connecting block (24) and the support (26).

6. The stable clamping tool for nut machining according to claim 4, wherein The opening angle adjusting mechanism comprises a rotating block (29) rotatably mounted on the corresponding rotating frame, one of the rotating blocks (29) being fixedly installed with a lead screw (30), a threaded sleeve for adjusting the opening angle between the two rotating frames being threadedly rotatably mounted on the lead screw (30), and the lead screw (30) penetrating the other rotating block (29).

7. The stable clamping tool for nut machining as claimed in claim 1, wherein, The driving assembly comprises a motor (32) fixedly mounted on the top operation table (3), a worm (31) rotatably mounted on the top operation table (3), the worm (31) being connected with the driving end of the motor (32) through a transmission gear set (33), and a worm ring (34) fixedly mounted on the circular ring (38) and matched with the worm (31).

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