阅读说明：本技术 一种五轴加工用龙门数控加工工装 (Gantry numerical control machining tool for five-axis machining ) 是由 林建新 罗田 于 2021-07-17 设计创作，主要内容包括：本发明属于加工中心领域,尤其是一种五轴加工用龙门数控加工工装,针对现有的工装夹持过程中不同尺寸工件的重心不一致,影响后续加工,且只能在较小范围内对工件进行夹持问题,现提出如下方案,其包括作业台和作业台底部栓接的支框,所述支框内侧中端的底部铰接有铰板,所述铰板顶部的中端栓接有连板,所述连板的顶端铰接有连架,所述连架的顶端铰接有齿杆,所述齿杆与支框铰接,所述齿杆的顶部啮合有齿条,利用移动的左夹板和右夹板可以保障待加工工件的重心一致,避免偏移,而且左夹板和右夹板的活动范围大,可以夹持的工件尺寸范围大,同时支框将大部分传动结构隐藏在其内部,减少外界因素的干扰。(The invention belongs to the field of machining centers, in particular to a gantry numerical control machining tool for five-axis machining, which aims at solving the problems that the centers of gravity of workpieces with different sizes are inconsistent in the clamping process of the existing tool, the subsequent machining is influenced, and the workpieces can only be clamped in a smaller range, and the prior tool comprises an operating platform and a support frame bolted to the bottom of the operating platform, wherein the bottom of the middle end of the inner side of the support frame is hinged with a hinged plate, the middle end of the top of the hinged plate is bolted with a connecting plate, the top end of the connecting plate is hinged with a connecting frame, the top end of the connecting frame is hinged with a toothed rod, the toothed rod is hinged with the support frame, the top of the toothed rod is meshed with a rack, the centers of gravity of the workpieces to be machined can be ensured to be consistent by utilizing a movable left clamping plate and a movable clamping plate, the deviation is avoided, the movable ranges of the left clamping plate and the right clamping plate are large, the sizes of the workpieces which can be clamped are large, and most of transmission structures are hidden in the support frame, reducing the interference of external factors.)

1. The gantry numerical control machining tool for five-axis machining comprises an operating platform (1) and a support frame (2) bolted to the bottom of the operating platform (1), and is characterized in that a hinge plate (3) is hinged to the bottom of the inner middle end of the support frame (2), a connecting plate (4) is bolted to the middle end of the top of the hinge plate (3), a connecting frame (5) is hinged to the top end of the connecting plate (4), a toothed bar (6) is hinged to the top end of the connecting frame (5), the toothed bar (6) is hinged to the support frame (2), a rack (7) is meshed to the top of the toothed bar (6), a lead screw (10) is connected to the inner thread of the rack (7), the right end of the lead screw (10) is connected with a motor (11), a left plate (12) is hinged to the left end of the hinge plate (3), a right plate (13) is hinged to the right end of the hinge plate (3), a chute (14) is formed in the top of the operating platform (1), the left side sliding connection of spout (14) inside has left splint (15), the right side sliding connection of spout (14) inside has right splint (16), the left end of left side board (12) is articulated to have drive mechanism (8), the right-hand member of right side board (13) articulates there is conduction mechanism (9).

2. The gantry numerical control machining tool for five-axis machining according to claim 1, wherein the transmission mechanism (8) comprises an upper pulley (81), a lower pulley (82), a transmission belt (83), a connecting block (84), a large gear (85), a small gear (86), a driving wheel (87), a driven wheel (88) and a chain (89), the axis of the upper pulley (81) is rotatably sleeved with the inside of the supporting frame (2), the axis of the lower pulley (82) is rotatably sleeved with the inside of the supporting frame (2) and the bottom of the upper pulley (81), the top and the bottom of the inner side of the transmission belt (83) are respectively in transmission connection with the surfaces of the upper pulley (81) and the lower pulley (82), the top and the bottom of the connecting block (84) are respectively bolted with two ends of the transmission belt (83), and the right side of the connecting block (84) is hinged with the left end of the left plate (12), the axle center department of gear wheel (85) and the rear side of last pulley (81) are fixed to be cup jointed, the top of gear wheel (85) meshes with the bottom of pinion (86), the axle center department of pinion (86) and the inside rotation of a frame (2) cup joint, the axle center department of action wheel (87) and the rear side of pinion (86) are fixed to be cup jointed, follower (88) quantity is two, and the axle center department of two follower (88) rotates with the left side and the middle-end of a frame (2) inside respectively and cup joints, chain (89) are the triangle-shaped structure and are connected with action wheel (87) and two follower (88) transmission respectively.

3. The gantry numerical control machining tool for five-axis machining according to claim 1, wherein the transmission mechanism (9) comprises a toothed plate (91), a connecting wheel (92), a lower bevel gear (93), an upper bevel gear (94), a transmission wheel (95), a transmission wheel (96), a first wheel (97), a second wheel (98) and a screw (99), the left side of the toothed plate (91) is hinged to the right end of a right plate (13), the right side of the toothed plate (91) is meshed with the left side of the connecting wheel (92), the rear side of the connecting wheel (92) is fixedly sleeved with the axis of the lower bevel gear (93), the axis of the rear side of the lower bevel gear (93) is rotatably sleeved with the inside of the supporting frame (2), the top of the lower bevel gear (93) is meshed with the bottom of the upper bevel gear (94), the right side of the upper bevel gear (94) is fixedly sleeved with the axis of the left side of the transmission wheel (95), the mechanism is characterized in that the axis of the driving wheel (95) is rotatably sleeved with the right side inside the support frame (2), the driving wheel (95) is in transmission connection with the transmission wheel (96), the axis of the right side of the transmission wheel (96) is rotatably sleeved with the right side inside the support frame (2), the left side of the transmission wheel (96) is fixedly sleeved with the axis of the right side of the first wheel (97), the top of the first wheel (97) is meshed with the bottom of the second wheel (98), the axis of the second wheel (98) is fixedly sleeved with the surface of the screw rod (99), and the right end of the screw rod (99) is rotatably sleeved with the right side inside the support frame (2).

4. The gantry numerical control machining tool for five-axis machining according to claim 2, characterized in that a sliding plate (17) is bolted to the inner side of the transmission belt (83) inside the supporting frame (2), the right side of the sliding plate (17) is slidably connected with the left side of the connecting block (84), and the left end of the left plate (12) is inclined upwards.

5. The gantry numerical control machining tool for five-axis machining is characterized in that a connecting frame (18) is bolted to the bottom of the left clamping plate (15), the bottom end of the connecting frame (18) penetrates through an opening in the bottom of the sliding chute (14) and extends to the bottom of the workbench (1), and two ends of the chain (89) are respectively bolted to two sides of the connecting frame (18).

6. The gantry numerical control machining tool for five-axis machining according to claim 3, characterized in that a limit rod (19) is bolted to the bottom end inside the support frame (2), the surface of the limit rod (19) is in sliding connection with the inside of the toothed plate (91), and the right end of the right plate (13) is inclined upwards.

7. The gantry numerical control machining tool for five-axis machining according to claim 3, wherein a connecting belt (20) is arranged between the surfaces of the driving wheel (95) and the conducting wheel (96), and the driving wheel (95) is in transmission connection with the conducting wheel (96) through the connecting belt (20).

8. The gantry numerical control machining tool for five-axis machining according to claim 3, wherein the lower helical gear (93) and the upper helical gear (94) are helical gears.

9. The gantry numerical control machining tool for five-axis machining according to claim 3, characterized in that a moving block (21) is connected to the surface of the screw (99) in a threaded manner, and the top of the moving block (21) penetrates through an opening in the bottom of the sliding groove (14) and is bolted to the bottom of the right clamping plate (16).

10. The gantry numerical control machining tool for five-axis machining is characterized in that a stabilizing block (22) is bolted to the top of the rack (7), a U-shaped frame (23) is slidably connected to the inside of the stabilizing block (22), a stabilizing frame (24) is bolted to the left side of the U-shaped frame (23), the rear side of the stabilizing frame (24) is bolted to the inside of the support frame (2), the bottom of the right side of the stabilizing frame (24) is rotatably sleeved with the left end of the screw rod (10), and the rear side of the motor (11) is fixedly installed to the inside of the support frame (2).

11. The gantry numerical control machining tool for five-axis machining according to claim 1, characterized in that a heat dissipation net (25) is clamped in an opening on the left side of the support frame (2), and the top end of the connecting frame (5) inclines to the left.

Technical Field

The invention relates to the technical field of machining centers, in particular to a gantry numerical control machining tool for five-axis machining.

Background

Five-axis linkage processing means that there are five coordinate axes at least on a lathe, and can process under the control of computer numerical control system simultaneous coordinated motion, longmen numerical control processing frock is wherein important component, application number CN 202010265367.1's patent discloses a numerical control machine tool machining center work piece pneumatic type centre gripping frock, through the setting of supporting device, make also can make the stable removal of activity grip block through less power cylinder, and then can make the stable centre gripping work piece of activity grip block and fixed grip block, thereby can be convenient for reduce the energy consumption of this centre gripping frock, help the energy-concerving and environment-protective of this centre gripping frock.

But this digit control machine tool machining center work piece pneumatic type centre gripping frock also has some problems, for example, only set up a movable clamp plate and a solid fixed splint, its focus often no longer on the same point when carrying out the centre gripping to not unidimensional article, lead to treating the focus skew of processing work piece, this brings the trouble for the processing of work piece, clamping structure's home range is little moreover, can only process the work piece of certain size, its drive structure exposes outside more simultaneously, receive external factor's influence easily, influence the transmission of result.

Disclosure of Invention

Based on the technical problems that the centers of gravity of workpieces with different sizes are inconsistent in the clamping process, subsequent machining is influenced, and the workpieces can be clamped only in a small range in the background technology, the invention provides a gantry numerical control machining tool for five-axis machining.

The invention provides a gantry numerical control machining tool for five-axis machining, which comprises a workbench and a support frame bolted to the bottom of the workbench, wherein a hinge plate is hinged to the bottom of the middle end of the inner side of the support frame, a connecting plate is bolted to the middle end of the top of the hinge plate, a connecting frame is hinged to the top end of the connecting plate, a rack rod is hinged to the top end of the connecting frame, the rack rod is hinged to the support frame, a rack is meshed to the top of the rack rod, a lead screw is connected to the inner thread of the rack rod, a motor is connected to the right end of the lead screw, a left plate is hinged to the left end of the hinge plate, a right plate is hinged to the right end of the hinge plate, a chute is formed in the top of the workbench, a left clamping plate is connected to the left side of the inside of the chute in a sliding manner, a right clamping plate is connected to the right side of the inside of the chute in a sliding manner, a transmission mechanism is hinged to the left end of the left plate, a transmission mechanism is hinged to the right plate, and the left clamping plate and the tool can clamp a workpiece by utilizing the synchronous movement of the left clamping plate and the right clamping plate simultaneously, avoid the work piece skew, left splint and right splint can all move about on a large scale in the inside of spout moreover, let it can the centre gripping bigger size or the work piece of smaller size, make things convenient for subsequent processing, hide the protection with most structure simultaneously, strengthen the stability of frock.

Preferably, the transmission mechanism comprises an upper pulley, a lower pulley, a transmission belt, a connecting block, a gear wheel, a pinion, a driving wheel, a driven wheel and a chain, wherein the axle center of the upper pulley is rotatably sleeved with the inside of the supporting frame, the axle center of the lower pulley is rotatably sleeved with the inside of the supporting frame and the bottom of the upper pulley, the top and the bottom of the inner side of the transmission belt are respectively in transmission connection with the surfaces of the upper pulley and the lower pulley, the top and the bottom of the connecting block are respectively in bolted connection with the two ends of the transmission belt, the right side of the connecting block is hinged with the left end of the left plate, the axle center of the gear wheel is fixedly sleeved with the rear side of the upper pulley, the top of the gear wheel is meshed with the bottom of the pinion, the axle center of the pinion is rotatably sleeved with the inside of the supporting frame, the axle center of the driving wheel is fixedly sleeved with the rear side of the pinion, and the number of the driven wheel is two, and the axle center department of two follower rotates with the inside left side and the middle-end of a frame respectively and cup joints, the chain is the triangle-shaped structure and is connected with action wheel and two follower transmissions respectively, the motor can drive the rack through the lead screw and remove, the rack can drive even frame through the ratch and remove, even the frame can drive the hinge plate through linking the board and rotate, the left end of hinge plate can drive mechanism through the left board and remove, drive mechanism can drive left splint and remove, the right-hand member of hinge plate can drive the conduction mechanism through the right board and remove, the conduction mechanism can drive right splint and remove, the focus that utilizes the left splint and the right splint that remove can ensure the work piece of waiting to process is unanimous, avoid the skew.

Preferably, the transmission mechanism comprises a toothed plate, a connecting wheel, a lower bevel gear, an upper bevel gear, a transmission wheel, a first wheel, a second wheel and a screw rod, wherein the left side of the toothed plate is hinged with the right end of the right plate, the right side of the toothed plate is meshed with the left side of the connecting wheel, the rear side of the connecting wheel is fixedly sleeved with the axis of the lower bevel gear, the axis of the rear side of the lower bevel gear is rotatably sleeved with the inside of the supporting frame, the top of the lower bevel gear is meshed with the bottom of the upper bevel gear, the right side of the upper bevel gear is fixedly sleeved with the axis of the left side of the transmission wheel, the axis of the transmission wheel is rotatably sleeved with the right side of the inside of the supporting frame, the transmission wheel is in transmission connection with the transmission wheel, the axis of the right side of the transmission wheel is rotatably sleeved with the right side of the supporting frame, the left side of the transmission wheel is fixedly sleeved with the axis of the right side of the first wheel, and the top of the first wheel is meshed with the bottom of the second wheel, the axle center department of second wheel cup joints with the fixed surface of screw rod, the right-hand member of screw rod is rotated with the inside right side of a frame and is cup jointed the motor and can be driven the rack through the lead screw and remove, the rack passes through the ratch and can drive even removal, even the frame can drive the hinge plate through even board and rotate, the left end of hinge plate can drive mechanism through the left plate and remove, drive mechanism can drive left splint and remove, the right-hand member of hinge plate can drive conduction mechanism through the right board and remove, conduction mechanism can drive right splint and remove, the focus that utilizes the left splint and the right splint that remove to ensure to treat the processing work piece is unanimous, avoid squinting.

Preferably, a sliding plate is bolted to the inner side of the transmission belt in the supporting frame, the right side of the sliding plate is slidably connected with the left side of the connecting block, the left end of the left plate inclines upwards, and the sliding plate can limit the sliding of the connecting block.

Preferably, the bottom of the left clamping plate is bolted with a connecting frame, the bottom end of the connecting frame penetrates through the opening in the bottom of the sliding groove and extends to the bottom of the operating platform, two ends of the chain are respectively bolted with two sides of the connecting frame, and the connecting frame can be used for connecting the left clamping plate and the transmission mechanism.

Preferably, the bottom bolt of the inside of a support frame is connected with a limiting rod, the surface of the limiting rod is connected with the inner sliding part of the toothed plate, the right end of the right plate inclines upwards, and the limiting rod can limit the toothed plate in a sliding mode.

Preferably, a connecting belt is arranged between the surfaces of the driving wheel and the transmission wheel, the driving wheel is in transmission connection with the transmission wheel through the connecting belt, the lower bevel gear and the upper bevel gear are bevel gears, and the connecting belt can be connected with the driving wheel and the transmission wheel.

Preferably, the lower bevel gear and the upper bevel gear are bevel gears, so that smooth transmission of the structure is guaranteed.

Preferably, the surface of the screw is in threaded connection with a moving block, the top of the moving block penetrates through an opening in the bottom of the sliding groove and is in bolted connection with the bottom of the right clamping plate, and the moving block can be connected with the right clamping plate and the conduction mechanism.

Preferably, the top of rack bolt has the steady piece, the inside sliding connection of steady piece has U type frame, the left side bolt of U type frame has the steady rest, the rear side of steady rest and the inside bolt of a frame, the bottom on steady rest right side rotates with the left end of lead screw and cup joints, the rear side of motor and the inside fixed mounting of a frame, the stability that the steady piece can strengthen the rack and remove.

Preferably, the radiator-grid is clamped at the opening on the left side of the support frame, the top end of the connecting frame inclines leftwards, and the radiator-grid can radiate heat.

The invention has the beneficial effects that:

1. the motor can drive the rack to move through the lead screw, the rack can drive the connecting frame to move through the rack bar, the connecting frame can drive the hinged plate to rotate through the connecting plate, the left end of the hinged plate can drive the transmission mechanism to move through the left plate, the transmission mechanism can drive the left clamping plate to move, the right end of the hinged plate can drive the transmission mechanism to move through the right plate, the transmission mechanism can drive the right clamping plate to move, the centers of gravity of workpieces to be processed can be ensured to be consistent by the aid of the movable left clamping plate and the movable right clamping plate, and deviation is avoided;

2. the movable range of the left clamping plate and the right clamping plate is large, the size range of workpieces which can be clamped is large, and workpieces with more sizes can be clamped;

3. the hinge plate, the connecting frame, the rack bar, the rack, the transmission mechanism, the conduction mechanism and the like are hidden in the support frame, so that the support frame can be effectively protected, the interference of external factors is reduced, the structural damage is avoided, and the stability of the tool is enhanced;

this frock can utilize left splint and right splint synchronous motion simultaneously to carry out the centre gripping to the work piece fixed, avoids the work piece skew, and left splint and right splint can all move about on a large scale in the inside of spout moreover, let it can the centre gripping bigger size or the work piece of less size, make things convenient for subsequent processing, hide the protection with most structure simultaneously, strengthen the stability of frock.

Drawings

Fig. 1 is a schematic front view structure diagram of a gantry numerical control machining tool for five-axis machining according to the present invention;

FIG. 2 is a schematic structural diagram of a transmission mechanism of a gantry numerical control machining tool for five-axis machining, which is provided by the invention;

FIG. 3 is a schematic structural view of a conducting mechanism of a gantry numerical control machining tool for five-axis machining, which is provided by the invention;

FIG. 4 is a schematic structural diagram of a screw rod of the gantry numerical control machining tool for five-axis machining, which is provided by the invention;

FIG. 5 is a schematic perspective view of a hinge plate of the gantry numerical control machining tool for five-axis machining according to the present invention;

fig. 6 is a three-dimensional schematic view of a toothed plate of the gantry numerical control machining tool for five-axis machining.

In the figure: 1 operating platform, 2 supporting frames, 3 hinge plates, 4 connecting plates, 5 connecting frames, 6 toothed bars, 7 racks, 8 transmission mechanisms, 81 upper pulleys, 82 lower pulleys, 83 transmission belts, 84 connecting blocks, 85 large gears, 86 small gears, 87 driving wheels, 88 driven wheels, 89 chains, 9 transmission mechanisms, 91 toothed plates, 92 connecting wheels, 93 lower bevel gears, 94 upper bevel gears, 95 transmission wheels, 96 transmission wheels, 97 first wheels, 98 second wheels, 99 screw rods, 10 lead screws, 11 motors, 12 left plates, 13 right plates, 14 sliding chutes, 15 left clamping plates, 16 right clamping plates, 17 sliding plates, 18 connecting frames, 19 limiting rods, 20 connecting belts, 21 moving blocks, 22 stabilizing blocks, 23U-shaped frames, 24 stabilizing frames and 25 heat dissipation nets.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Examples

Referring to fig. 1-6, the embodiment provides a gantry numerical control machining tool for five-axis machining, which includes a workbench 1 and a support frame 2 bolted to the bottom of the workbench 1, a heat dissipation net 25 is clamped in an opening on the left side of the support frame 2, the heat dissipation net 25 is used for heat dissipation of the support frame 2, a hinge plate 3 is hinged to the bottom of the middle end of the inner side of the support frame 2, a connecting plate 4 is bolted to the middle end of the top of the hinge plate 3, a connecting frame 5 is hinged to the top end of the connecting plate 4, the top end of the connecting frame 5 inclines to the left, a rack bar 6 is hinged to the top of the support frame 2, a rack 7 is meshed to the top of the rack bar 6, a lead screw 10 is connected to the internal thread of the rack 7, a motor 11 is connected to the right end of the lead screw 10, both ends of the hinge plate 3 can move synchronously, a stabilizing block 22 is bolted to the top of the rack bar 7, a U-shaped frame 23 is slidably connected to the inside of the stabilizing block 22, a stabilizing frame 24 is bolted to the left side of the U-shaped frame 23, the rear side of a stabilizing frame 24 is bolted with the inside of a support frame 2, the bottom of the right side of the stabilizing frame 24 is rotatably sleeved with the left end of a screw rod 10, a U-shaped frame 23 can limit the sliding of a rack 7, the rear side of a motor 11 is fixedly installed with the inside of the support frame 2, the left end of a hinge plate 3 is hinged with a left plate 12, the right end of the hinge plate 3 is hinged with a right plate 13, the top of a workbench 1 is provided with a chute 14, the left side of the chute 14 is slidably connected with a left clamping plate 15, the right side of the chute 14 is slidably connected with a right clamping plate 16, the chute 14 can limit the sliding of the left clamping plate 15 and the right clamping plate 16 to only move left and right, the left end of the left plate 12 is hinged with a transmission mechanism 8, the transmission mechanism 8 comprises an upper pulley 81, a lower pulley 82, a transmission belt 83, a connecting block 84, a large gear 85, a small gear 86, a driving gear 87, a driven gear 88 and a chain 89, the axis of the upper pulley 81 is sleeved with the inside of the support frame 2, the axle center of the lower pulley 82 is rotatably sleeved with the inner part of the supporting frame 2 and the bottom of the upper pulley 81, the top and the bottom of the inner side of the transmission belt 83 are respectively in transmission connection with the surfaces of the upper pulley 81 and the lower pulley 82, the top and the bottom of the connecting block 84 are respectively in bolted connection with two ends of the transmission belt 83, the right side of the connecting block 84 is hinged with the left end of the left plate 12, the axle center of the large gear 85 is fixedly sleeved with the rear side of the upper pulley 81, the top of the large gear 85 is meshed with the bottom of the small gear 86, the axle center of the small gear 86 is rotatably sleeved with the inner part of the supporting frame 2, the axle center of the driving wheel 87 is fixedly sleeved with the rear side of the small gear 86, the number of the driven wheels 88 is two, the axle centers of the two driven wheels 88 are respectively rotatably sleeved with the left side and the middle end of the inner part of the supporting frame 2, the chain 89 is in a triangular structure and is respectively in transmission connection with the driving wheel 87 and the two driven wheels 88, the left plate 12 drives the transmission belt 83 to rotate through the connecting block 84, the transmission belt 83 drives a large gear 85 to rotate through an upper pulley 81, the large gear 85 drives a driving wheel 87 to rotate through a small gear 86, the driving wheel 87 drives the connecting frame 18 to move through a chain 89, the connecting frame 18 drives the left clamping plate 15 to move, a sliding plate 17 is bolted inside the supporting frame 2 and positioned on the inner side of the transmission belt 83, the right side of the sliding plate 17 is in sliding connection with the left side of the connecting block 84, the left end of the left plate 12 inclines upwards, the connecting frame 18 is bolted at the bottom of the left clamping plate 15, the bottom end of the connecting frame 18 penetrates through an opening at the bottom of the sliding chute 14 and extends to the bottom of the operating platform 1, two ends of the chain 89 are respectively bolted with two sides of the connecting frame 18, the right end of the right plate 13 is hinged with a conduction mechanism 9, the conduction mechanism 9 comprises a toothed plate 91, a connecting wheel 92, a lower bevel gear 93, an upper bevel gear 94, a transmission wheel 95, a conduction wheel 96, a first wheel 97, a second wheel 98 and a screw 99, the left side of the toothed plate 91 is hinged with the right end of the right plate 13, the right side of the toothed plate 91 is engaged with the left side of the connecting wheel 92, the rear side of the connecting wheel 92 is fixedly sleeved with the axle center of the lower bevel gear 93, the axle center of the rear side of the lower bevel gear 93 is rotatably sleeved with the inside of the supporting frame 2, the top of the lower bevel gear 93 is engaged with the bottom of the upper bevel gear 94, the right side of the upper bevel gear 94 is fixedly sleeved with the axle center of the left side of the driving wheel 95, the axle center of the driving wheel 95 is rotatably sleeved with the right side of the inside of the supporting frame 2, the driving wheel 95 is in transmission connection with the transmission wheel 96, the axle center of the right side of the transmission wheel 96 is rotatably sleeved with the right side of the inside of the supporting frame 2, the left side of the transmission wheel 96 is fixedly sleeved with the axle center of the right side of the first wheel 97, the top of the first wheel 97 is engaged with the bottom of the second wheel 98, the axle center of the second wheel 98 is fixedly sleeved with the surface of the screw 99, the right end of the screw 99 is rotatably sleeved with the right side of the inside of the supporting frame 2, the toothed plate 91 drives the lower bevel gear 93 to rotate through the connecting wheel 92, the lower bevel gear 93 drives a driving wheel 95 to rotate through an upper bevel gear 94, the driving wheel 95 drives a transmission wheel 96 to rotate through a connecting belt 20, the transmission wheel 96 drives a second wheel 98 to rotate through a first wheel 97, the second wheel 98 drives a movable block 21 to move through a screw 99, the movable block 21 drives a right clamping plate 16 to move until a workpiece is firmly clamped by a left clamping plate 15 and the right clamping plate 16, a limiting rod 19 is bolted at the bottom end inside a supporting frame 2, the surface of the limiting rod 19 is in sliding connection with the inside of a toothed plate 91, the right end of a right plate 13 inclines upwards, the connecting belt 20 is arranged between the driving wheel 95 and the surface of the transmission wheel 96, the driving wheel 95 is in transmission connection with the transmission wheel 96 through the connecting belt 20, the lower bevel gear 93 and the upper bevel gear 94 are bevel gears, the surface of the screw 99 is in threaded connection with the movable block 21, the top of the movable block 21 penetrates through an opening at the bottom of the sliding chute 14 and is in bolted with the bottom of the right clamping plate 16, the motor 11 can drive the rack 7 to move through the lead screw 10, the rack 7 can drive the connecting frame 5 to move through the rack bar 6, the connecting frame 5 can drive the hinged plate 3 to rotate through the connecting plate 4, the left end of the hinged plate 3 can drive the transmission mechanism 8 to move through the left plate 12, the transmission mechanism 8 can drive the left clamping plate 15 to move, the right end of the hinged plate 3 can drive the transmission mechanism 9 to move through the right plate 13, the transmission mechanism 9 can drive the right clamping plate 16 to move, the centers of gravity of the workpieces to be processed can be guaranteed to be consistent by the aid of the movable left clamping plate 15 and the movable right clamping plate 16, and deviation is avoided; the movable range of the left clamping plate 15 and the right clamping plate 16 is large, the size range of workpieces which can be clamped is large, and workpieces with more sizes can be clamped; the hinge plate 3, the connecting plate 4, the connecting frame 5, the rack bar 6, the rack 7, the transmission mechanism 8, the transmission mechanism 9 and the like are hidden in the support frame 2, so that the support frame can be effectively protected, the interference of external factors is reduced, the structural damage is avoided, and the stability of the tool is enhanced; this frock can utilize left splint 15 and right splint 16 synchronous motion simultaneously to carry out the centre gripping to the work piece fixed, avoids the work piece skew, and left splint 15 and right splint 16 can all be in the inside activity on a large scale of spout 14 moreover, let it can the centre gripping bigger size or the work piece of smaller size, make things convenient for subsequent processing, hide the protection with most structure simultaneously, strengthen the stability of frock.

The working principle is as follows: the power supply of the motor 11 is switched on, a workpiece to be clamped is placed at the top of the operating platform 1, the gravity center is aligned with the middle end of the top of the operating platform 1, the motor 11 is started, the motor 11 drives the screw rod 10 to rotate, the screw rod 10 drives the rack 7 to move leftwards, the rack 7 drives the stabilizing block 22 to slide and limit on the surface of the U-shaped frame 23, the stabilizing frame 24 supports and limits the U-shaped frame 23 and the screw rod 10, the rack 7 drives the toothed bar 6 to rotate anticlockwise, the bottom end of the toothed bar 6 moves rightwards, the toothed bar 6 drives the connecting frame 5 to move rightwards, the connecting frame 5 drives the connecting plate 4 to move rightwards, the connecting plate 4 moving rightwards drives the hinged plate 3 to rotate clockwise, the left end of the hinged plate 3 moves upwards, the right end moves downwards, the hinged plate 3 drives the left plate 12 to move upwards, the left plate 12 drives the connecting block 84 to move upwards, the connecting block 84 slides and limits on the side surface of the sliding plate 17, the connecting block 84 drives the driving belt 83 to rotate anticlockwise, the lower pulley 82 limits the transmission of the transmission belt 83, the transmission belt 83 rotating counterclockwise drives the upper pulley 81 to rotate counterclockwise, the upper pulley 81 drives the big gear 85 to rotate counterclockwise, the big gear 85 drives the small gear 86 to rotate clockwise, the small gear 86 drives the driving wheel 87 to rotate clockwise, the driving wheel 87 drives the chain 89 to rotate clockwise, the chain 89 is guided by the two driven wheels 88 to be in a triangular structure, the top of the chain 89 drives the connecting frame 18 to move rightwards, the connecting frame 18 drives the left clamping plate 15 to move rightwards close to a workpiece, meanwhile, the right end of the hinge plate 3 drives the right plate 13 to move downwards, the right plate 13 drives the toothed plate 91 to move downwards, the toothed plate 91 limits the surface sliding of the limiting rod 19, the toothed plate 91 drives the connecting wheel 92 on the right side to rotate counterclockwise, the connecting wheel 92 drives the lower bevel gear 93 to rotate counterclockwise, the lower bevel gear 93 drives the upper bevel gear 94 to rotate, and the upper bevel gear 94 drives the transmission wheel 95 to rotate, the driving wheel 95 drives the connecting belt 20 to rotate, the connecting belt 20 drives the transmission wheel 96 to rotate, the transmission wheel 96 drives the first wheel 97 to rotate, the first wheel 97 drives the second wheel 98 to rotate, the second wheel 98 drives the screw 99 to rotate, the screw 99 drives the moving block 21 to move leftwards, and the moving block 21 drives the right clamping plate 16 to move leftwards to be close to a workpiece until the left clamping plate 15 and the right clamping plate 16 firmly clamp the workpiece.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.