CN112658468A - Coordination clamping chuck with V-shaped groove claw head - Google Patents
Coordination clamping chuck with V-shaped groove claw head Download PDFInfo
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- CN112658468A CN112658468A CN202110018042.8A CN202110018042A CN112658468A CN 112658468 A CN112658468 A CN 112658468A CN 202110018042 A CN202110018042 A CN 202110018042A CN 112658468 A CN112658468 A CN 112658468A
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Abstract
The invention discloses a coordinated clamping chuck with a V-shaped groove and a jaw head, which belongs to the technical field of laser pipe processing and comprises a main disc, a main shaft, a cylindrical roller bearing, a driving gear, a gas distribution ring, a clamping assembly, a guiding limit assembly, a driving part and a driving disc, wherein the main disc and the gas distribution ring are arranged on the main shaft; the driving end of the driving piece is connected with the driving disc, and the fixed end of the driving piece is connected with the main disc; the driving disk is provided with a plurality of groups of spiral grooves; the driving piece enables the driving disc to rotate relative to the main disc so as to drive the clamping mechanism positioned in the spiral groove to be close to or far away from the center of the main disc along the guide limiting assembly, and the clamping or loosening of the pipe is completed. The invention realizes asynchronous control and respective opposite synchronous control of the elastic pressure plate assembly and the jaw assembly on the single driving disc, simplifies the clamping chuck and ensures the centering clamping capability of pipes with different section shapes.
Description
Technical Field
The invention belongs to the technical field of laser pipe machining, and particularly relates to a coordinated clamping chuck with a V-shaped groove jaw head.
Background
The current precision thin-walled tube processing is usually completed by laser cutting. The cross-sectional shapes of the pipes needing to be processed in the market are various, such as: the pipe, rectangular pipe, oval pipe etc. for guaranteeing the processing point coincidence of laser beam focus and tubular product, need hold tubular product with the accurate positioning fixture that can adapt to different shape cross-sections to the feeding of control tubular product when adding man-hour.
The Chinese patent application CN107984157A discloses a four-jaw chuck driven by a cylinder, wherein four jaws of the chuck are respectively connected by four cylinders through hinges, and synchronous motion is realized between the opposite jaws through a synchronous rotating ring on a disk body; the jack catch is long L shape jack catch, and the claw head of jack catch is equipped with longer flat mouthful, can the comparatively complicated tubular product of centre gripping cross-sectional shape.
The chinese patent application CN109604658A discloses an automatic centering device for a chuck, in which jaws of the chuck are also connected by four cylinders through hinges respectively, but the synchronizing device adopts a gear transmission mechanism, and the chuck includes two sets of meshing gears for controlling the synchronous centering motion of two pairs of jaws respectively. When the gear disc rotates, the cylinder opposite to the clamping jaws extends in a certain posture under the motion of the bevel gear, and the clamping jaws are driven to move through the hinges and the connecting rods. The claw head of the claw of the disc is a single small bearing.
In the U.S. patent application No. 6220608B1, a four-jaw chuck is disclosed, the scheme of synchronous jaw-to-jaw movement of the chuck is an archimedes screw disk, a motor drives a driving disk to rotate through a gear, so that jaws are driven to do linear centripetal movement under the constraint of a disk surface structure, and the jaws used by the chuck are common jaws.
In the structures of the two chucks, four cylinders are adopted to respectively drive each clamping jaw, the structure can enable the size of the whole chuck to be larger, too much space is occupied on a precise thin-walled tube processing machine tool with a small diameter, and meanwhile, the flat opening of the jaw head of the first chuck is very thin, so that indentation and damage can be generated on the surface of a tube; the synchronous motion of the second chuck is realized by gear meshing transmission, the requirement on the processing precision of teeth is high, otherwise, the synchronous precision is reduced due to factors such as tooth thickness error, and the like; the driving disc drive of the third chuck is an external engagement drive, the rotation of the chuck body and the driving disc needs to be measured and controlled when the motors are controlled, and the two motors are not decoupled, so that the control is complex, the clamping jaws of the chuck are common hard jaws, and the adaptability to clamping of pipes with different interface shapes is poor.
In addition to the three chucks, according to practical application scenes, a plurality of different laser processing chuck products are available in the market at present, two pairs of two-jaw linkage clamping jaws are mostly adopted for four-jaw chucks, two sets of synchronizing mechanisms are needed for driving, and in the clamping process, because one pair of jaws always clamps a pipe before the other pair of jaws, the friction force generated by the clamping jaws clamped firstly can possibly cause that the clamping jaws clamped later can not center the pipe, so that the centering precision is influenced.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a coordinated clamping chuck with a V-shaped groove jaw head, which aims to realize the synchronous control of a clamping assembly by adopting a single driving piece and a single driving disc for transmission, thereby solving the technical problem that the prior four-jaw chuck needs to adopt two groups of driving transmission mechanisms when clamping a pipe and has a complex structure; meanwhile, the V-shaped groove jaw head has the function of simultaneously centering in two directions, and the influence of the clamping sequence of a common jaw chuck on the centering precision is avoided.
To achieve the above object, according to one aspect of the present invention, there is provided a coordinate clamping chuck having a V-groove jaw head, including a main disc, a main shaft, a cylindrical roller bearing, a driving gear and an air distribution ring, the main disc and the air distribution ring being disposed at two ends of the main shaft, the cylindrical roller bearing and the driving gear being sequentially sleeved on the main shaft, further including: a clamping mechanism and a driving mechanism;
the clamping mechanism comprises a clamping component and a guide limiting component, the guide limiting component is arranged on the surface of the main disc and forms mutually vertical guide grooves, and the clamping component is arranged in the guide grooves;
the driving mechanism comprises a driving part and a driving disc, the driving end of the driving part is connected to the driving disc, and the fixed end of the driving part is connected to the main disc;
the driving disc is provided with a plurality of groups of thread grooves, and the connecting rod assembly of the clamping assembly penetrates through the main disc and is positioned in the thread grooves of the driving disc;
the driving part is used for driving the driving disc to rotate relative to the main disc so as to drive the connecting rod mechanism positioned in the spiral groove to drive the clamping mechanism to approach or leave the center of the main disc along the guide limiting assembly, thereby completing clamping or loosening of an object to be clamped.
Preferably, the driving disc comprises two first spiral grooves and two second spiral grooves which are symmetrical about the circle center of the driving disc; the connecting line of the proximal ends of the two first spiral grooves close to the circle center of the driving disc is mutually perpendicular to the connecting line of the proximal ends of the two second spiral grooves close to the circle center of the driving disc, and the distance from the proximal ends of the first spiral grooves to the circle center is equal to the distance from the proximal ends of the second spiral grooves to the circle center.
Preferably, the distance from the far end of the first spiral groove to the center of the circle is greater than the distance from the far end of the second spiral groove to the center of the circle, that is, the pitch of the first spiral groove is greater than the pitch of the second spiral groove.
Preferably, the first spiral groove and the second spiral groove have the same rotation direction and the same rotation angle.
Preferably, the drive disc further comprises an avoidance slot and a mating hole;
the fixed end of the driving piece penetrates through the avoidance groove through a pin shaft to be in interference fit with the main disc;
the driving end of the driving piece is in interference fit with the matching hole through a pin shaft.
Preferably, the fixed end of the driving piece is in clearance fit with the pin shaft, and the driving end of the driving piece is in clearance fit with the pin shaft; and the retainer ring limits the freedom degree of axial movement of the fixed end and the driving end.
Preferably, fixture includes first jack catch subassembly, second jack catch subassembly and elasticity clamp plate subassembly, first jack catch subassembly with the second jack catch subassembly set up relatively in the spacing spout of first direction of the spacing subassembly of direction, elasticity clamp plate subassembly set up relatively in the spacing spout of second direction of the spacing subassembly of direction.
Preferably, the first jaw assembly consists of a jaw base body, a sliding base, an adjusting bolt base and an adjusting bolt; the claw head of the first claw component is a single V-shaped groove claw head; the clamping jaw base body is arranged on the sliding base, and a bolt countersunk hole is formed in the upper part of the clamping jaw base body; the adjusting bolt base is arranged at the upper part of the sliding base and is provided with a threaded hole, the adjusting bolt is arranged in the adjusting bolt base, and the jaw base body moves relative to the sliding base by rotating the adjusting bolt so as to adjust the relative position of the jaw base body and the second jaw assembly;
the second jaw assembly has the same structure as the first jaw assembly, and the jaw head of the second jaw assembly is a double-V-shaped groove jaw head.
Preferably, the elastic pressure plate assembly consists of a pressure plate base body, a linear groove, a spring, a transmission connecting rod and a ball bearing;
one end of the pressing plate base body is provided with a clamping part, and the clamping part is of a semi-cylindrical structure; one end of the spring is abutted against the supporting end of the pressing plate base body, and the other end of the spring is abutted against the tail end of the second guide limiting sliding groove; a linear groove is formed in the pressing plate base body, and the transmission connecting rod is installed in the linear groove; one end of the transmission connecting rod is provided with a limiting part for ensuring the transmission connecting rod to move in the linear groove, the other end of the transmission connecting rod is provided with the ball bearing, and the ball bearing is used for driving the transmission connecting rod to move towards the circle center of the main disc or move away from the circle center of the main disc in the track of the second spiral groove.
Preferably, the retainer includes, but is not limited to, a screw and a washer, an externally threaded screw and a nut, and a circlip.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. according to the coordination clamping chuck with the V-shaped groove and the jaw head, the single driving piece is adopted to drive the single driving disc to rotate relative to the main disc so as to drive the clamping mechanism positioned in the spiral groove to synchronously approach or depart from the center of the main disc along the guide limiting assembly, so that clamping or loosening of a pipe is completed, the clamping chuck is simplified, and meanwhile, the centering clamping capacity of the pipe is ensured.
2. According to the coordination clamping chuck with the V-shaped groove and the jaw head, the group of first spiral grooves and the group of second spiral grooves are arranged on the driving disc, and the thread pitch of the first spiral grooves is larger than that of the second spiral grooves, so that the elastic pressing plate assembly is required to be contracted inwards in the first spiral grooves before the jaw assembly when the elastic pressing plate assembly does centripetal movement in the second spiral grooves, and the elastic pressing plate assembly can be contacted with a pipe earlier than the jaw assembly, and the posture of the pipe is corrected.
3. According to the coordination clamping chuck with the V-shaped groove and the jaw head, after the elastic pressure plate assembly presses a pipe, the linear groove on the elastic pressure plate assembly enables the elastic pressure plate assembly to continue to move centripetally under the control of the track of the second spiral groove, but is static under the action of the spring and the pipe, so that certain pressure is applied to the pipe.
4. According to the coordination clamping chuck with the V-shaped groove jaw head, the jaws of the jaw assembly are designed to be V-shaped groove jaws, and the V-shaped groove positioning principle is utilized, so that the jaws can be centered in two directions simultaneously, and the self-centering clamping effect is achieved; the claw heads of the V-shaped grooves are designed into staggered tooth structures, so that the stress of the pipe is balanced, the torque internal force is not generated, and the staggered claw heads can ensure that the claws do not interfere when clamping small-diameter pipes.
5. According to the coordination clamping chuck with the V-shaped groove jaw head, the jaw head of the jaw assembly is connected with the base body through the large round angle, so that the problem of internal stress concentration during clamping of the jaws can be effectively solved; the inclined plane at the rear part of the claw base body is provided with an elastic pressure plate assembly capable of avoiding collision with the elastic pressure plate assembly during centripetal motion.
6. According to the coordination clamping chuck with the V-shaped groove and the jaw head, the clamping part of the elastic pressure plate assembly is of the arc flat structure, the flat structure can be in contact with a pipe when the position and the posture of the pipe are adjusted, and the arc contact can prevent the pressure plate from exerting excessive constraint on the pipe so as to prevent the pipe from generating excessive internal force.
7. The invention provides a coordination clamping chuck with a V-shaped groove jaw head.A large-variation rectangular spring is connected in series at the tail end of an elastic pressure plate assembly, and the spring is always kept in a compressed state during working and provides centripetal pressure for the elastic pressure plate assembly; the center of a pressing plate base body of the elastic pressing plate assembly is provided with a linear groove, a driving connecting rod driven by the driving disc and the elastic pressing plate assembly can slide in the linear groove, so that when the elastic pressing plate assembly is loosened, the driving connecting rod abuts against the tail end of the linear groove to drive the elastic pressing plate assembly to recover and compress the spring.
Drawings
FIG. 1 is a schematic diagram of a conformable clamp chuck having a V-groove jaw head according to the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention with a V-groove jaw head for a conformable clamping chuck;
FIG. 3 is a schematic structural diagram of a guide and limit mechanism of a coordinated clamping chuck with a V-shaped groove jaw head according to the present invention;
FIG. 4 is a schematic diagram of the drive plate of the present invention having a V-groove jaw head for a coordinated clamping chuck;
FIG. 5 is a schematic view of a first jaw assembly of the present invention having a V-groove jaw head for a cooperative gripping chuck;
FIG. 6 is a schematic view of the construction of the jaws of the present invention with a V-groove jaw head for a coordinated gripping chuck;
FIG. 7 is a schematic diagram of the spring platen of the present invention having a V-groove jaw head for a coordinated clamping chuck;
FIG. 8 is a schematic view of the operation of the chuck in an embodiment of the present invention when gripping a tubular;
FIG. 9 is a schematic view of the chuck operating to release a tubular in an embodiment of the present invention;
FIG. 10 is a schematic view of an embodiment of the present invention in which a rectangular tube is placed between the V-groove jaws and the elastic pressing plate in a random posture;
FIG. 11 is a schematic view of an embodiment of the present invention after the elastic pressure plate has straightened the rectangular tube;
FIG. 12 is a schematic view of a V-groove jaw centering clamped right-angled rectangular tube in an embodiment of the present invention;
FIG. 13 is a schematic view showing an elliptical tube being interposed between a V-groove jaw and an elastic pressing plate in an arbitrary posture in the embodiment of the present invention;
figure 14 is a schematic view of the centering clamp for correcting the posture of the elliptical tube in the embodiment of the invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: a main shaft 10; a main tray 20; a first guiding and limiting chute 21; a second guiding and limiting chute 22; a first jaw assembly 30; a slide base 31; an adjusting bolt base 32; an adjusting bolt 33; a second jaw assembly 40; a resilient platen assembly 50; a linear groove 51; a spring 52; a screw 53; a spacer 54; a drive link 55; a ball bearing 56; a drive disk 60; a first spiral groove 61; a second spiral groove 62; an avoidance groove 63; a mating hole 64; a driver 70; a cylindrical roller bearing 80; a drive gear 90; gas distribution ring 100.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the term pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in figures 1 and 2, the invention discloses a coordinated clamping chuck with V-shaped groove jaw heads, which is used for clamping, fixing and rotating a pipe in laser processing of the pipe and is matched with a feeding device to realize continuous feeding and feeding of the pipe, and the clamping chuck comprises a main shaft 10, a main disc 20, a clamping mechanism, a driving disc 60, a driving piece 70, a cylindrical roller bearing 80, a driving gear 90 and an air distribution ring 100, wherein the main shaft, the main disc, the clamping mechanism, the driving disc 60, the driving piece 70, the cylindrical roller bearing 80, the driving gear 90 and
the front end of main shaft 10 is equipped with the screw hole that distributes along the circumference at the terminal surface, main disc 20 passes through threaded connection and installs on the preceding terminal surface of main shaft 10, fixture includes centre gripping subassembly and the spacing subassembly of direction, centre gripping subassembly with the spacing subassembly of direction is installed the front surface of main disc 20, driving-disc 60 cover on the main shaft 10 and with the rear surface laminating of main disc 20, drive gear 90 installs on the main shaft 10, cylindrical roller bearing 80 installs on drive gear 90's the wheel hub excircle, gas distribution ring 100 installs the rear end of main shaft 10.
Specifically, in the embodiment of the present invention, the driving disk 60 is an archimedes disk, and the driving member 70 is an air cylinder.
In further illustration, as shown in fig. 2 and 3, the guiding and limiting assembly includes a first guiding and limiting sliding groove 21 and a second guiding and limiting sliding groove 22, and the clamping assembly includes a first jaw assembly 30, a second jaw assembly 40 and an elastic pressing plate assembly 50.
Specifically, the first guiding and limiting sliding groove 21 and the second guiding and limiting sliding groove 22 are positioned by pins and are installed on the front surface of the main plate 20 through threaded connection, and the first guiding and limiting sliding groove 21 and the second guiding and limiting sliding groove 22 are perpendicular to each other and limit the movement of the first jaw assembly 30, the second jaw assembly 40 and the elastic pressing plate assembly 50.
To explain further, as shown in fig. 2, the inner cylindrical surface of the driving disk 60 is engaged with the outer cylindrical surface of the main shaft 10, and the inner and outer rings of the driving disk 60 are provided with annular steps and frictionally contact the rear surface of the main disk 20. The fixed end of the driving member 70 is provided with a single-lug mounting base, the single-lug mounting base is connected with the main disc 20 through a pin shaft, and the degree of freedom of axial movement of the driving member 70 is limited by a retainer ring. Furthermore, a single-lug connector is arranged at the upper end of the driving part 70, the single-lug connector is connected with the driving disc 60 through a pin shaft, the pin shaft is in interference fit with the matching hole 64 in the driving disc 60, and the pin shaft is in clearance fit with the single-lug connector at the upper end of the driving part 70, so that the single-lug connector can rotate around the pin shaft.
The driving disc 60 is driven by the driving element 70 to rotate relative to the main disc 20 according to the following working principle: when the driving member 70, i.e. the air cylinder in this embodiment, the piston of the air cylinder extends, the driving disk 60, i.e. the archimedes disk in this embodiment, is pushed to rotate around the spindle 10, and simultaneously the single-lug mounting base rotates around the pin shaft, and simultaneously the single-lug connecting member rotates around the pin shaft, so as to match the extension of the piston of the air cylinder and the rotation of the archimedes disk.
To be further described, as shown in fig. 4, in the embodiment of the present invention, the driving disk 60 includes 6 linear grooves and 2 fitting holes, wherein the fitting hole 64 is in interference fit with the pin shaft, and the power of the driving element 70 is transmitted to the driving disk 60 through the pin shaft and the fitting hole 64 in interference fit.
Further, the driving disc 60 includes two first screw grooves 61 and two second screw grooves 62, the two first screw grooves 61 are symmetrically disposed about a center of the driving disc 60, and the two second screw grooves 62 are symmetrically disposed about the center of the driving disc 60. In this embodiment, the end of the four spiral grooves close to the center of the driving disk is called proximal end, and the end far away from the center of the driving disk is called distal end. Specifically, a proximal end connecting line of the first spiral groove 61 and a proximal end connecting line of the second spiral groove 62 are perpendicular to each other, and distances from proximal ends of the four spiral grooves to a center of the driving disc 60 are equal. The distance from the far end of the first spiral groove 61 to the center of the circle is far longer than the distance from the far end of the second spiral groove 62 to the center of the circle, namely, the thread pitch of the first spiral groove 61 is larger than that of the second spiral groove 62. In this embodiment, the first spiral groove 61 and the second spiral groove 62 have the same rotation direction and the same rotation angle.
As a preferred embodiment of the present invention, the driving disc 60 further includes an avoiding groove 63, and the avoiding groove 63 is an arc-shaped wire groove, so that the driving disc 60 can avoid a pin shaft connected with the single-lug mounting base when rotating.
In further illustration, as shown in fig. 5 and 6, the first jaw assembly 30 includes a jaw base body of a single V-groove jaw head, a slide base 31, an adjusting bolt base 32, and an adjusting bolt 33, and the single V-groove jaw head is connected with the jaw base body through a large radius transition section to reduce stress concentration. And the rear portion of base member has the inclined plane of dodging for avoid colliding with elastic pressure plate subassembly 50 when moving, base member upper portion is equipped with the bolt counter bore, adjusting bolt base 32 top surface has the screw hole, the base member passes through the bolt counter bore and installs on the sliding bottom 31, as shown in fig. 5, adjusting bolt 33 is located in adjusting bolt base 32, and its screw thread end screw in jack catch base member top surface screw hole, through rotating adjusting bolt 33, makes jack catch base member relative sliding bottom 31 micro-displacement, and then as shown in fig. 6 adjustment and the relative position of second jack catch subassembly, guarantee to heart centre gripping precision. And similarly, the second jaw assembly is adjusted to enable the jaw base body of the second jaw assembly to slightly move relative to the sliding base, so that the relative position of the second jaw assembly and the first jaw assembly is adjusted.
Further, the second jaw assembly 40 is structurally different from the first jaw assembly 30 only in the jaw head, the jaw head of the second jaw assembly 40 is a double-V-groove jaw head, and other structures are the same as those of the first jaw assembly 30.
To be further described, as shown in fig. 7, in the present embodiment, the elastic pressing plate assembly 50 includes a pressing plate base, a linear groove 51, a spring 52, a transmission link 55, a ball bearing 56, and a limiting member, wherein one end of the base has a clamping portion, the clamping portion has a semi-cylindrical structure, the pressing plate base is provided with the linear groove 51, and the transmission link 55 slides in the linear groove 51. The limiting member comprises a half-round head screw 53 and a gasket 54, and the half-round head screw 53 and the gasket 54 are matched with a step in the linear groove 51 to axially limit the transmission connecting rod 55. The other end of the transmission connecting rod 55 is matched with the ball bearing 56 and slides in the second spiral groove 62, a spring 52 is arranged at the tail end of the pressing plate base body, and the spring 52 is in a compressed state all the time in the movement process. It should be noted that the structure of the limiting member of the transmission link 55 in the linear groove 51 is not limited to the use of a screw and a washer, and may also use a structure of an external thread plus a nut, a circlip, or other limiting methods.
The coordination clamping chuck with the V-shaped groove claw head comprises two processes of clamping and unclamping a pipe when in work, wherein the two processes comprise
In the clamping process of the pipe
As shown in fig. 8, the linear movement of the piston of the driver 70 drives the drive disc 60 to rotate relative to the main disc 20. When the driving disc 60 rotates clockwise in the figure, because the pitch of the second spiral groove 62 is smaller than the pitch of the first spiral groove 61, the transmission link 55 of the elastic pressure plate assembly 50 is closer to the center of the driving disc 60 than the V-shaped groove jaws of the jaw assembly, and at this time, the tail end of the linear groove 51 is kept in contact with the transmission link 55 under the pressure of the spring 52, so that the elastic pressure plate assembly 50 contacts the pipe earlier than the first jaw assembly 30 and the second jaw assembly 40. After the elastic pressure plate assembly 50 compresses the pipe firstly, the compression force is provided by the spring 52, the elastic pressure plate assembly 50 does not move centripetally along with the transmission connecting rod 55 and is static, the driving disc 60 continues to rotate clockwise, the first spiral groove 61 drives the first jaw assembly 30 and the second jaw assembly 40 to continue to do synchronous centripetal linear motion, the transmission connecting rod 55 continues to move centripetally in the linear groove 51 until the first jaw assembly 30 and the second jaw assembly 40 clamp the pipe simultaneously, the driving disc 60 stops rotating under the reaction force of the jaws, and the whole clamping chuck finishes clamping the pipe.
During the unclamping process of the pipe
As shown in fig. 9, when the driving disc 60 rotates counterclockwise in the drawing, the first jaw assembly 30 and the second jaw assembly 40 perform synchronous centrifugal linear motion, the transmission link 55 performs centrifugal linear motion in the linear groove 51, after the transmission link 55 contacts the end of the linear groove 51, the elastic pressure plate assembly 50 performs centrifugal linear motion under the driving of the transmission link 55, and further compresses the spring 52, at this time, the clamping chuck releases the clamping of the tube.
In operation, as shown in figure 10, a rectangular tube is placed between the jaws in a random position and the linear motion of the piston of the driver 70 drives the drive disc 60 to rotate relative to the main disc 20. When the driving disc 60 rotates clockwise in the figure, because the pitch of the second spiral groove 62 is smaller than the pitch of the first spiral groove 61, the transmission link 55 of the elastic pressure plate assembly 50 is closer to the center of the circle of the driving disc 60 than the transmission link assembly of the V-shaped groove jaw of the jaw assembly, and at this time, the end of the linear groove 51 is kept in contact with the transmission link 55 under the pressure of the spring 52, so that the elastic pressure plate assembly 50 contacts the pipe earlier than the first jaw assembly 30 and the second jaw assembly 40, which can be approximately in point-surface contact, and the contact force is along the normal direction of the contact surface, so that the contact force of the two clamping parts and the rectangular pipe forms a moment, the rectangular pipe rotates under the action of the moment to adjust the posture, and simultaneously the first jaw and the second jaw continue to move centripetally, the spring 52 applies pressure to the elastic pressure plate assembly 50, so that the point-surface contact of the rectangular pipe is changed, the magnitude of the adjusting torque becomes 0, at this time, the posture of the rectangular tube is adjusted, as shown in fig. 11, the elastic pressure plate assembly 50 does not continue to move centripetally along with the transmission rail 55, the length of the spring 52 remains unchanged, the driving disc 60 continues to rotate clockwise, the first spiral groove 61 drives the first jaw assembly 30 and the second jaw assembly 40 to continue to move synchronously and centripetally, the transmission connecting rod 55 continues to move centripetally in the linear groove 51, after one side of the V-shaped jaw of the first jaw assembly 30 and the second jaw assembly 40 contacts the rectangular tube, the center of the rectangular tube is pushed to the center of the chuck through the continued centripetally movement, the clamping part of the elastic pressure plate assembly 50 can conform to the position of the tube through the spring 52 in the process, and thus the centering and positioning of the rectangular tube are completed. As shown in fig. 12, the first jaw assembly 30 and the second jaw assembly 40 simultaneously clamp the pipe, and the driving disc 60 stops rotating under the reaction force of the jaws, so that the centering and posture-fixing clamping of the rectangular pipe is completed.
As shown in fig. 13, the oval tube is placed between the jaws in a random posture, when the driving disc 60 rotates clockwise in the figure, the clamping portion of the elastic pressure plate assembly 50 will contact the tube first, at this time, the contact force can be similar to point-surface contact, the contact force is along the normal direction of the contact surface, so the contact force of the two clamping portions and the oval tube forms a moment, the oval tube rotates under the action of the moment to adjust the posture, meanwhile, the first jaw assembly 30 and the second jaw assembly 40 continue centripetal movement, the spring 52 applies pressure to the elastic pressure plate assembly 50 until the connecting line of the contact points of the oval tube and the two clamping portions is parallel to the movement direction of the elastic pressure plate assembly 50, the adjustment moment of the clamping portions to the oval tube is 0, and at this time, the posture adjustment of the oval tube is completed. As shown in fig. 14, the post centering process is similar to rectangular tube clamping.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a coordinate centre gripping chuck with V type groove claw head, includes main disc (20), main shaft (10), cylindrical roller bearing (80), drive gear (90) and gas distribution ring (100), and main disc (20) and gas distribution ring (100) set up in the both ends of main shaft (10), and cylindrical roller bearing (80) and drive gear (90) overlap in proper order and locate main shaft (10), its characterized in that still includes: a clamping mechanism and a driving mechanism;
the clamping mechanism comprises a clamping component and a guide limiting component, the guide limiting component is arranged on the surface of the main disc (20) and forms guide grooves which are vertical to each other, and the clamping component is arranged in the guide grooves;
the driving mechanism comprises a driving piece (70) and a driving disc (60), the driving end of the driving piece (70) is connected to the driving disc (60), and the fixed end of the driving piece is connected to the main disc (20);
the driving disc (60) is provided with a plurality of groups of thread grooves, and the connecting rod assembly of the clamping assembly penetrates through the main disc (20) and is positioned in the thread grooves of the driving disc (60);
the driving piece (70) is used for driving the driving disc (60) to rotate relative to the main disc (20) so as to drive the connecting rod mechanism positioned in the spiral groove to drive the clamping mechanism to approach or separate from the center of the main disc (20) along the guide limiting assembly, and therefore clamping or loosening of an object to be clamped is completed.
2. The coordination grip chuck with V-groove jaw head as claimed in claim 1, characterized in that said driving disc (60) comprises two first screw grooves (61) and two second screw grooves (62) symmetrical about its centre; the connecting line of the proximal ends of the two first spiral grooves (61) close to the circle center of the driving disc (60) is mutually vertical to the connecting line of the proximal ends of the two second spiral grooves (62) close to the circle center of the driving disc (60), and the distance from the proximal ends of the first spiral grooves (61) to the circle center is equal to the distance from the proximal ends of the second spiral grooves (62) to the circle center.
3. A conformable clamping chuck with V-groove jaw head according to claim 2, characterized in that the distance from the distal end of the first thread groove (61) to the centre of the circle is larger than the distance from the distal end of the second thread groove (62) to the centre of the circle, i.e. the pitch of the first thread groove (61) is larger than the pitch of the second thread groove (62).
4. The clamping chuck according to claim 3, wherein the first and second thread grooves (61, 62) are rotated in the same direction and at the same angle.
5. The coordination grip chuck with V-groove jaw head according to any one of claims 2 to 4, characterized in that the driving disk (60) further comprises an evasion groove (63) and a fitting hole (64);
the fixed end of the driving piece (70) penetrates through the avoidance groove (63) through a pin shaft to be in interference fit with the main disc (20);
the driving end of the driving piece (70) is in interference fit with the matching hole (64) through a pin shaft.
6. The coordination grip chuck with V-groove jaw head as claimed in claim 5, wherein the fixed end of the driving member (70) is in clearance fit with the pin, and the driving end of the driving member (70) is in clearance fit with the pin; and the retainer ring limits the freedom degree of axial movement of the fixed end and the driving end.
7. The coordination grip chuck with V-groove jaw head according to claim 1 or 6, characterized in that the gripping mechanism comprises a first jaw assembly (30), a second jaw assembly (40) and an elastic pressure plate assembly (50), the first jaw assembly (30) and the second jaw assembly (40) are relatively arranged in the first guiding and limiting sliding groove (21) of the guiding and limiting assembly, and the elastic pressure plate assembly (50) is relatively arranged in the second guiding and limiting sliding groove (22) of the guiding and limiting assembly.
8. The coordination grip chuck with V-groove jaw head as claimed in claim 7, characterized in that said first jaw assembly (30) is composed of a jaw base, a slide base (31), an adjusting bolt base (32) and an adjusting bolt (33); the claw head of the first claw component is a single V-shaped groove claw head; the jaw base body is arranged on the sliding base (31), and a bolt countersunk hole is formed in the upper part of the jaw base body; the adjusting bolt base (32) is arranged at the upper part of the sliding base (31) and is provided with a threaded hole, the adjusting bolt (33) is arranged in the adjusting bolt base (32), and the jaw base body moves relative to the sliding base (31) by rotating the adjusting bolt (33) so as to adjust the relative position of the jaw base body and the second jaw assembly;
the second jaw assembly (40) is identical to the first jaw assembly in structure, and the jaw head of the second jaw assembly (40) is a double-V-shaped groove jaw head.
9. The coordination grip chuck with V-groove jaw head as claimed in claim 7, characterized in that the elastic pressure plate assembly (50) is composed of a pressure plate base, a linear groove (51), a spring (52), a transmission link (55) and a ball bearing (56);
one end of the pressing plate base body is provided with a clamping part; one end of the spring (52) is abutted against the supporting end of the pressing plate base body, and the other end of the spring is abutted against the tail end of the second guide limiting sliding groove (22); a linear groove (51) is formed in the pressure plate base body, and the transmission connecting rod (55) is installed in the linear groove (51); one end of the transmission connecting rod (55) is provided with a limiting piece for ensuring that the transmission connecting rod (55) moves in the linear groove (51), the other end of the transmission connecting rod (55) is provided with the ball bearing (56), and the ball bearing (56) is used for driving the transmission connecting rod (55) to move towards the circle center direction of the main disc (20) or away from the circle center direction of the main disc (20) in the track of the second spiral groove (62).
10. The conformable clamping chuck with V-groove jaw head as in claim 9, wherein the retaining elements include, but are not limited to, screws (53) and washers (54), externally threaded screws and nuts and circlips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110018042.8A CN112658468B (en) | 2021-01-07 | 2021-01-07 | Coordinated clamping chuck with V-shaped groove claw heads |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110018042.8A CN112658468B (en) | 2021-01-07 | 2021-01-07 | Coordinated clamping chuck with V-shaped groove claw heads |
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| CN112658468A true CN112658468A (en) | 2021-04-16 |
| CN112658468B CN112658468B (en) | 2022-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110018042.8A Active CN112658468B (en) | 2021-01-07 | 2021-01-07 | Coordinated clamping chuck with V-shaped groove claw heads |
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| CN113894721A (en) * | 2021-10-25 | 2022-01-07 | 武汉市工程科学技术研究院 | Slender pipe rotating and clamping mechanism and slender pipe processing equipment |
| CN114086296A (en) * | 2021-10-11 | 2022-02-25 | 武汉博瑞智信科技有限公司 | Novel three-dimensional circular cone loom complete machine system |
| CN114161075A (en) * | 2022-02-14 | 2022-03-11 | 北京东方国信科技股份有限公司 | Tubular workpiece synchronous rotation clamping mechanism and welding system based on visual detection |
| CN114473057A (en) * | 2021-12-27 | 2022-05-13 | 江苏博凡科精密五金科技有限公司 | Fast machining equipment for fasteners |
| WO2023029107A1 (en) * | 2021-08-30 | 2023-03-09 | 苏州幕特克自动化设备有限公司 | Precision positioning clamp for pipe machining |
| EP4230340A1 (en) | 2022-02-17 | 2023-08-23 | Bystronic Laser AG | Clamping device for laser processing machine |
| CN117261253A (en) * | 2023-11-21 | 2023-12-22 | 中建二局第四建筑工程有限公司 | Pipe ironing equipment for indoor hydropower installation |
| CN117303225A (en) * | 2023-11-27 | 2023-12-29 | 扬州国电通用电力机具制造有限公司 | Lifting device for floor rocker arm holding pole for electric power construction |
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| CN117303225A (en) * | 2023-11-27 | 2023-12-29 | 扬州国电通用电力机具制造有限公司 | Lifting device for floor rocker arm holding pole for electric power construction |
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